Checkpatch.pl generates false alarm

Roland Vossen
2011-07-11T14:49:15Z

[-- Attachment #1: Type: text/plain, Size: 436 bytes --]

Hello Andy,

when I feed attached file to checkpatch, several warnings are given, but
this one:

WARNING: externs should be avoided in .c files
#3555: FILE: staging/brcm80211/brcmsmac/main.c:3555:
+ END_FOREACH_BSS

does not seem to make sense. When I place a comment behind the
END_FOREACH_BSS line, the checkpatch warning disappears.

Let me know if you need additional info to work on this.

Thanks,

Roland Vossen
Broadcom

[-- Attachment #2: main.c --]
[-- Type: text/plain, Size: 265576 bytes --]

/*
* Copyright (c) 2010 Broadcom Corporation
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <linux/pci_ids.h>
#include <net/mac80211.h>
#include <brcm_hw_ids.h>
#include <aiutils.h>
#include <chipcommon.h>
#include "rate.h"
#include "scb.h"
#include "phy/phy_hal.h"
#include "channel.h"
#include "antsel.h"
#include "stf.h"
#include "ampdu.h"
#include "alloc.h"
#include "mac80211_if.h"
#include "ucode_loader.h"
#include "main.h"

/*
* WPA(2) definitions
*/
#define RSN_CAP_4_REPLAY_CNTRS 2
#define RSN_CAP_16_REPLAY_CNTRS 3

#define WPA_CAP_4_REPLAY_CNTRS RSN_CAP_4_REPLAY_CNTRS
#define WPA_CAP_16_REPLAY_CNTRS RSN_CAP_16_REPLAY_CNTRS

/*
* Indication for txflowcontrol that all priority bits in
* TXQ_STOP_FOR_PRIOFC_MASK are to be considered.
*/
#define ALLPRIO -1

/*
* 32 SSID chars, max of 4 chars for each SSID char "\xFF", plus NULL.
*/
#define SSID_FMT_BUF_LEN ((4 * IEEE80211_MAX_SSID_LEN) + 1)

#define TIMER_INTERVAL_WATCHDOG 1000 /* watchdog timer, in unit of ms */
#define TIMER_INTERVAL_RADIOCHK 800 /* radio monitor timer, in unit of ms */

/* Max MPC timeout, in unit of watchdog */
#ifndef BRCMS_MPC_MAX_DELAYCNT
#define BRCMS_MPC_MAX_DELAYCNT 10
#endif

/* Min MPC timeout, in unit of watchdog */
#define BRCMS_MPC_MIN_DELAYCNT 1
#define BRCMS_MPC_THRESHOLD 3 /* MPC count threshold level */

#define BEACON_INTERVAL_DEFAULT 100 /* beacon interval, in unit of 1024TU */
#define DTIM_INTERVAL_DEFAULT 3 /* DTIM interval, in unit of beacon interval */

/* Scale down delays to accommodate QT slow speed */
#define BEACON_INTERVAL_DEF_QT 20 /* beacon interval, in unit of 1024TU */
#define DTIM_INTERVAL_DEF_QT 1 /* DTIM interval, in unit of beacon interval */

#define TBTT_ALIGN_LEEWAY_US 100 /* min leeway before first TBTT in us */

/* Software feature flag defines used by wlfeatureflag */
#define WL_SWFL_NOHWRADIO 0x0004
#define WL_SWFL_FLOWCONTROL 0x0008 /* Enable backpressure to OS stack */
#define WL_SWFL_WLBSSSORT 0x0010 /* Per-port supports sorting of BSS */

/* n-mode support capability */
/* 2x2 includes both 1x1 & 2x2 devices
* reserved #define 2 for future when we want to separate 1x1 & 2x2 and
* control it independently
*/
#define WL_11N_2x2 1
#define WL_11N_3x3 3
#define WL_11N_4x4 4

/* define 11n feature disable flags */
#define WLFEATURE_DISABLE_11N 0x00000001
#define WLFEATURE_DISABLE_11N_STBC_TX 0x00000002
#define WLFEATURE_DISABLE_11N_STBC_RX 0x00000004
#define WLFEATURE_DISABLE_11N_SGI_TX 0x00000008
#define WLFEATURE_DISABLE_11N_SGI_RX 0x00000010
#define WLFEATURE_DISABLE_11N_AMPDU_TX 0x00000020
#define WLFEATURE_DISABLE_11N_AMPDU_RX 0x00000040
#define WLFEATURE_DISABLE_11N_GF 0x00000080

#define EDCF_ACI_MASK 0x60
#define EDCF_ACI_SHIFT 5
#define EDCF_ECWMIN_MASK 0x0f
#define EDCF_ECWMAX_SHIFT 4
#define EDCF_AIFSN_MASK 0x0f
#define EDCF_AIFSN_MAX 15
#define EDCF_ECWMAX_MASK 0xf0

#define EDCF_AC_BE_TXOP_STA 0x0000
#define EDCF_AC_BK_TXOP_STA 0x0000
#define EDCF_AC_VO_ACI_STA 0x62
#define EDCF_AC_VO_ECW_STA 0x32
#define EDCF_AC_VI_ACI_STA 0x42
#define EDCF_AC_VI_ECW_STA 0x43
#define EDCF_AC_BK_ECW_STA 0xA4
#define EDCF_AC_VI_TXOP_STA 0x005e
#define EDCF_AC_VO_TXOP_STA 0x002f
#define EDCF_AC_BE_ACI_STA 0x03
#define EDCF_AC_BE_ECW_STA 0xA4
#define EDCF_AC_BK_ACI_STA 0x27
#define EDCF_AC_VO_TXOP_AP 0x002f

#define EDCF_TXOP2USEC(txop) ((txop) << 5)
#define EDCF_ECW2CW(exp) ((1 << (exp)) - 1)

#define APHY_SYMBOL_TIME 4
#define APHY_PREAMBLE_TIME 16
#define APHY_SIGNAL_TIME 4
#define APHY_SIFS_TIME 16
#define APHY_SERVICE_NBITS 16
#define APHY_TAIL_NBITS 6
#define BPHY_SIFS_TIME 10
#define BPHY_PLCP_SHORT_TIME 96

#define PREN_PREAMBLE 24
#define PREN_MM_EXT 12
#define PREN_PREAMBLE_EXT 4

#define DOT11_MAC_HDR_LEN 24
#define DOT11_ACK_LEN 10
#define DOT11_BA_LEN 4
#define DOT11_OFDM_SIGNAL_EXTENSION 6
#define DOT11_MIN_FRAG_LEN 256
#define DOT11_RTS_LEN 16
#define DOT11_CTS_LEN 10
#define DOT11_BA_BITMAP_LEN 128
#define DOT11_MIN_BEACON_PERIOD 1
#define DOT11_MAX_BEACON_PERIOD 0xFFFF
#define DOT11_MAXNUMFRAGS 16
#define DOT11_MAX_FRAG_LEN 2346

#define BPHY_PLCP_TIME 192
#define RIFS_11N_TIME 2

#define WME_VER 1
#define WME_SUBTYPE_PARAM_IE 1
#define WME_TYPE 2
#define WME_OUI "\x00\x50\xf2"

#define AC_BE 0
#define AC_BK 1
#define AC_VI 2
#define AC_VO 3

/*
* driver maintains internal 'tick'(wlc->pub->now) which increments in 1s OS timer(soft
* watchdog) it is not a wall clock and won't increment when driver is in "down" state
* this low resolution driver tick can be used for maintenance tasks such as phy
* calibration and scb update
*/

/* To inform the ucode of the last mcast frame posted so that it can clear moredata bit */
#define BCMCFID(wlc, fid) brcms_b_write_shm((wlc)->hw, M_BCMC_FID, (fid))

#define BRCMS_WAR16165(wlc) (wlc->pub->sih->bustype == PCI_BUS && \
(!AP_ENAB(wlc->pub)) && (wlc->war16165))

/* Find basic rate for a given rate */
#define BRCMS_BASIC_RATE(wlc, rspec) (IS_MCS(rspec) ? \
(wlc)->band->basic_rate[mcs_table[rspec & RSPEC_RATE_MASK].leg_ofdm] : \
(wlc)->band->basic_rate[rspec & RSPEC_RATE_MASK])

#define FRAMETYPE(r, mimoframe) (IS_MCS(r) ? mimoframe : (IS_CCK(r) ? FT_CCK : FT_OFDM))

#define RFDISABLE_DEFAULT 10000000 /* rfdisable delay timer 500 ms, runs of ALP clock */

#define BRCMS_TEMPSENSE_PERIOD 10 /* 10 second timeout */

#define SCAN_IN_PROGRESS(x) 0

#define EPI_VERSION_NUM 0x054b0b00

/* precedences numbers for wlc queues. These are twice as may levels as
* 802.1D priorities.
* Odd numbers are used for HI priority traffic at same precedence levels
* These constants are used ONLY by wlc_prio2prec_map. Do not use them elsewhere.
*/
#define _BRCMS_PREC_NONE 0 /* None = - */
#define _BRCMS_PREC_BK 2 /* BK - Background */
#define _BRCMS_PREC_BE 4 /* BE - Best-effort */
#define _BRCMS_PREC_EE 6 /* EE - Excellent-effort */
#define _BRCMS_PREC_CL 8 /* CL - Controlled Load */
#define _BRCMS_PREC_VI 10 /* Vi - Video */
#define _BRCMS_PREC_VO 12 /* Vo - Voice */
#define _BRCMS_PREC_NC 14 /* NC - Network Control */

#define MAXMACLIST 64 /* max # source MAC matches */
#define BCN_TEMPLATE_COUNT 2

/* The BSS is generating beacons in HW */
#define BRCMS_BSSCFG_HW_BCN 0x20

#define HWBCN_ENAB(cfg) (((cfg)->flags & BRCMS_BSSCFG_HW_BCN) != 0)

#define MBSS_BCN_ENAB(cfg) 0
#define MBSS_PRB_ENAB(cfg) 0
#define SOFTBCN_ENAB(pub) (0)

#define TIMER_INTERVAL_WATCHDOG_BMAC 1000 /* watchdog timer, in unit of ms */

#define SYNTHPU_DLY_APHY_US 3700 /* a phy synthpu_dly time in us */
#define SYNTHPU_DLY_BPHY_US 1050 /* b/g phy synthpu_dly time in us, default */
#define SYNTHPU_DLY_NPHY_US 2048 /* n phy REV3 synthpu_dly time in us, default */
#define SYNTHPU_DLY_LPPHY_US 300 /* lpphy synthpu_dly time in us */

#define SYNTHPU_DLY_PHY_US_QT 100 /* QT synthpu_dly time in us */

#define ANTCNT 10 /* vanilla M_MAX_ANTCNT value */

#define DMAREG(wlc_hw, direction, fifonum) \
((direction == DMA_TX) ? \
(void *)&(wlc_hw->regs->fifo64regs[fifonum].dmaxmt) : \
(void *)&(wlc_hw->regs->fifo64regs[fifonum].dmarcv))

#define APHY_SLOT_TIME 9
#define BPHY_SLOT_TIME 20

/*
* The following table lists the buffer memory allocated to xmt fifos in HW.
* the size is in units of 256bytes(one block), total size is HW dependent
* ucode has default fifo partition, sw can overwrite if necessary
*
* This is documented in twiki under the topic UcodeTxFifo. Please ensure
* the twiki is updated before making changes.
*/

#define XMTFIFOTBL_STARTREV 20 /* Starting corerev for the fifo size table */

/* Check if a particular BSS config is AP or STA */
#define BSSCFG_AP(cfg) (0)
#define BSSCFG_STA(cfg) (1)
#define BSSCFG_IBSS(cfg) (!(cfg)->BSS)

/* iterate through all valid bsscfg entries */
#define FOREACH_BSS(wlc, idx, cfg) \
for (idx = 0; (int) idx < BRCMS_MAXBSSCFG; idx++) { \
cfg = (wlc)->bsscfg[idx]; \
if (!cfg) \
continue;

/* close marker for iterator code block */
#define END_FOREACH_BSS }

/* Shared memory location index for various AC params */
#define wme_shmemacindex(ac) wme_ac2fifo[ac]

/* currently the best mechanism for determining SIFS is the band in use */
#define SIFS(band) ((band)->bandtype == BRCM_BAND_5G ? APHY_SIFS_TIME : \
BPHY_SIFS_TIME);

/* dup state between BMAC(struct brcms_hardware) and HIGH(struct brcms_c_info)
driver */
struct brcms_b_state {
u32 machwcap; /* mac hw capibility */
u32 preamble_ovr; /* preamble override */
};

/* local prototypes */
static void brcms_b_clkctl_clk(struct brcms_hardware *wlc, uint mode);

/* used by wlc_wakeucode_init() */
static void brcms_c_write_inits(struct brcms_hardware *wlc_hw,
const struct d11init *inits);
static void brcms_ucode_write(struct brcms_hardware *wlc_hw, const u32 ucode[],
const uint nbytes);
static void brcms_ucode_download(struct brcms_hardware *wlc);
static void brcms_c_ucode_txant_set(struct brcms_hardware *wlc_hw);

/* used by brcms_c_down() */
static void brcms_c_flushqueues(struct brcms_c_info *wlc);

static void brcms_c_write_mhf(struct brcms_hardware *wlc_hw, u16 *mhfs);
static void brcms_c_mctrl_reset(struct brcms_hardware *wlc_hw);
static void brcms_b_corerev_fifofixup(struct brcms_hardware *wlc_hw);
static bool brcms_b_tx_fifo_suspended(struct brcms_hardware *wlc_hw,
uint tx_fifo);
static void brcms_b_tx_fifo_resume(struct brcms_hardware *wlc_hw,
uint tx_fifo);

/* Low Level Prototypes */

struct brcms_b_state;

static int brcms_b_attach(struct brcms_c_info *wlc, u16 vendor, u16 device,
uint unit, bool piomode, void *regsva, uint bustype,
void *btparam);

/* up/down, reset, clk */
static void brcms_b_reset(struct brcms_hardware *wlc_hw);
static int brcms_b_state_get(struct brcms_hardware *wlc_hw,
struct brcms_b_state *state);
static void brcms_b_copyfrom_vars(struct brcms_hardware *wlc_hw, char **buf,
uint *len);

static void brcms_b_hw_etheraddr(struct brcms_hardware *wlc_hw,
u8 *ea);

static bool brcms_b_radio_read_hwdisabled(struct brcms_hardware *wlc_hw);
static void brcms_b_wait_for_wake(struct brcms_hardware *wlc_hw);

static void brcms_b_set_addrmatch(struct brcms_hardware *wlc_hw,
int match_reg_offset,
const u8 *addr);
static void brcms_b_set_cwmin(struct brcms_hardware *wlc_hw, u16 newmin);
static void brcms_b_set_cwmax(struct brcms_hardware *wlc_hw, u16 newmax);

static void brcms_b_retrylimit_upd(struct brcms_hardware *wlc_hw, u16 SRL,
u16 LRL);

static void brcms_b_fifoerrors(struct brcms_hardware *wlc_hw);

static void brcms_b_pllreq(struct brcms_hardware *wlc_hw, bool set,
u32 req_bit);
static void brcms_b_antsel_set(struct brcms_hardware *wlc_hw,
u32 antsel_avail);
static int brcms_b_bandtype(struct brcms_hardware *wlc_hw);
static void brcms_b_info_init(struct brcms_hardware *wlc_hw);
static void brcms_b_xtal(struct brcms_hardware *wlc_hw, bool want);
static u16 brcms_b_read_objmem(struct brcms_hardware *wlc_hw, uint offset,
u32 sel);
static void brcms_b_write_objmem(struct brcms_hardware *wlc_hw, uint offset,
u16 v, u32 sel);
static void brcms_b_core_phy_clk(struct brcms_hardware *wlc_hw, bool clk);
static bool brcms_b_attach_dmapio(struct brcms_c_info *wlc, uint j, bool wme);
static void brcms_b_detach_dmapio(struct brcms_hardware *wlc_hw);
static void brcms_c_ucode_bsinit(struct brcms_hardware *wlc_hw);
static bool brcms_c_validboardtype(struct brcms_hardware *wlc);
static bool brcms_c_isgoodchip(struct brcms_hardware *wlc_hw);
static bool brcms_b_validate_chip_access(struct brcms_hardware *wlc_hw);
static char *brcms_c_get_macaddr(struct brcms_hardware *wlc_hw);
static void brcms_c_mhfdef(struct brcms_c_info *wlc, u16 *mhfs, u16 mhf2_init);
static void brcms_c_mctrl_write(struct brcms_hardware *wlc_hw);
static void brcms_b_mute(struct brcms_hardware *wlc_hw, bool want, u32 flags);
static void brcms_c_ucode_mute_override_set(struct brcms_hardware *wlc_hw);
static void brcms_c_ucode_mute_override_clear(struct brcms_hardware *wlc_hw);
static u32 brcms_c_wlintrsoff(struct brcms_c_info *wlc);
static void brcms_c_wlintrsrestore(struct brcms_c_info *wlc, u32 macintmask);
static void brcms_c_gpio_init(struct brcms_c_info *wlc);
static void brcms_c_write_hw_bcntemplate0(struct brcms_hardware *wlc_hw,
void *bcn, int len);
static void brcms_c_write_hw_bcntemplate1(struct brcms_hardware *wlc_hw,
void *bcn, int len);
static void brcms_b_bsinit(struct brcms_c_info *wlc, u16 chanspec);
static u32 brcms_c_setband_inact(struct brcms_c_info *wlc, uint bandunit);
static void brcms_b_setband(struct brcms_hardware *wlc_hw, uint bandunit,
u16 chanspec);
static void brcms_b_update_slot_timing(struct brcms_hardware *wlc_hw,
bool shortslot);
static void brcms_upd_ofdm_pctl1_table(struct brcms_hardware *wlc_hw);
static u16 brcms_b_ofdm_ratetable_offset(struct brcms_hardware *wlc_hw,
u8 rate);

static u16 brcms_c_d11hdrs_mac80211(struct brcms_c_info *wlc,
struct ieee80211_hw *hw,
struct sk_buff *p,
struct scb *scb, uint frag,
uint nfrags, uint queue,
uint next_frag_len,
struct wsec_key *key,
u32 rspec_override);
static void brcms_c_bss_default_init(struct brcms_c_info *wlc);
static void brcms_c_ucode_mac_upd(struct brcms_c_info *wlc);
static u32 mac80211_wlc_set_nrate(struct brcms_c_info *wlc,
struct brcms_band *cur_band,
u32 int_val);
static void brcms_c_tx_prec_map_init(struct brcms_c_info *wlc);
static void brcms_c_watchdog(void *arg);
static void brcms_c_watchdog_by_timer(void *arg);
static u16 brcms_c_rate_shm_offset(struct brcms_c_info *wlc, u8 rate);
static int brcms_c_set_rateset(struct brcms_c_info *wlc,
struct brcms_c_rateset *rs_arg);
static u8 brcms_c_local_constraint_qdbm(struct brcms_c_info *wlc);

/* send and receive */
static struct brcms_txq_info *brcms_c_txq_alloc(struct brcms_c_info *wlc);
static void brcms_c_txq_free(struct brcms_c_info *wlc,
struct brcms_txq_info *qi);
static void brcms_c_txflowcontrol_signal(struct brcms_c_info *wlc,
struct brcms_txq_info *qi,
bool on, int prio);
static void brcms_c_txflowcontrol_reset(struct brcms_c_info *wlc);
static void brcms_c_compute_cck_plcp(struct brcms_c_info *wlc, u32 rate,
uint length, u8 *plcp);
static void brcms_c_compute_ofdm_plcp(u32 rate, uint length, u8 *plcp);
static void brcms_c_compute_mimo_plcp(u32 rate, uint length, u8 *plcp);
static u16 brcms_c_compute_frame_dur(struct brcms_c_info *wlc, u32 rate,
u8 preamble_type, uint next_frag_len);
static u64 brcms_c_recover_tsf64(struct brcms_c_info *wlc,
struct brcms_d11rxhdr *rxh);
static void brcms_c_recvctl(struct brcms_c_info *wlc,
struct d11rxhdr *rxh, struct sk_buff *p);
static uint brcms_c_calc_frame_len(struct brcms_c_info *wlc, u32 rate,
u8 preamble_type, uint dur);
static uint brcms_c_calc_ack_time(struct brcms_c_info *wlc, u32 rate,
u8 preamble_type);
static uint brcms_c_calc_cts_time(struct brcms_c_info *wlc, u32 rate,
u8 preamble_type);
/* interrupt, up/down, band */
static void brcms_c_setband(struct brcms_c_info *wlc, uint bandunit);
static u16 brcms_c_init_chanspec(struct brcms_c_info *wlc);
static void brcms_c_bandinit_ordered(struct brcms_c_info *wlc,
u16 chanspec);
static void brcms_c_bsinit(struct brcms_c_info *wlc);
static int brcms_c_duty_cycle_set(struct brcms_c_info *wlc, int duty_cycle,
bool isOFDM, bool writeToShm);
static void brcms_c_radio_hwdisable_upd(struct brcms_c_info *wlc);
static bool brcms_c_radio_monitor_start(struct brcms_c_info *wlc);
static void brcms_c_radio_timer(void *arg);
static void brcms_c_radio_enable(struct brcms_c_info *wlc);
static void brcms_c_radio_upd(struct brcms_c_info *wlc);

/* scan, association, BSS */
static uint brcms_c_calc_ba_time(struct brcms_c_info *wlc, u32 rate,
u8 preamble_type);
static void brcms_c_update_mimo_band_bwcap(struct brcms_c_info *wlc, u8 bwcap);
static void brcms_c_ht_update_sgi_rx(struct brcms_c_info *wlc, int val);
static void brcms_c_ht_update_ldpc(struct brcms_c_info *wlc, s8 val);
static void brcms_c_war16165(struct brcms_c_info *wlc, bool tx);

static void brcms_c_wme_retries_write(struct brcms_c_info *wlc);
static bool brcms_c_attach_stf_ant_init(struct brcms_c_info *wlc);
static uint brcms_c_attach_module(struct brcms_c_info *wlc);
static void brcms_c_detach_module(struct brcms_c_info *wlc);
static void brcms_c_timers_deinit(struct brcms_c_info *wlc);
static void brcms_c_down_led_upd(struct brcms_c_info *wlc);
static uint brcms_c_down_del_timer(struct brcms_c_info *wlc);
static void brcms_c_ofdm_rateset_war(struct brcms_c_info *wlc);
static int _brcms_c_ioctl(struct brcms_c_info *wlc, int cmd, void *arg, int len,
struct brcms_c_if *wlcif);

const u8 prio2fifo[NUMPRIO] = {
TX_AC_BE_FIFO, /* 0 BE AC_BE Best Effort */
TX_AC_BK_FIFO, /* 1 BK AC_BK Background */
TX_AC_BK_FIFO, /* 2 -- AC_BK Background */
TX_AC_BE_FIFO, /* 3 EE AC_BE Best Effort */
TX_AC_VI_FIFO, /* 4 CL AC_VI Video */
TX_AC_VI_FIFO, /* 5 VI AC_VI Video */
TX_AC_VO_FIFO, /* 6 VO AC_VO Voice */
TX_AC_VO_FIFO /* 7 NC AC_VO Voice */
};

/* debug/trace */
uint brcm_msg_level =
#if defined(BCMDBG)
LOG_ERROR_VAL;
#else
0;
#endif /* BCMDBG */

/* TX FIFO number to WME/802.1E Access Category */
const u8 wme_fifo2ac[] = { AC_BK, AC_BE, AC_VI, AC_VO, AC_BE, AC_BE };

/* WME/802.1E Access Category to TX FIFO number */
static const u8 wme_ac2fifo[] = { 1, 0, 2, 3 };

static bool in_send_q;

/* 802.1D Priority to precedence queue mapping */
const u8 wlc_prio2prec_map[] = {
_BRCMS_PREC_BE, /* 0 BE - Best-effort */
_BRCMS_PREC_BK, /* 1 BK - Background */
_BRCMS_PREC_NONE, /* 2 None = - */
_BRCMS_PREC_EE, /* 3 EE - Excellent-effort */
_BRCMS_PREC_CL, /* 4 CL - Controlled Load */
_BRCMS_PREC_VI, /* 5 Vi - Video */
_BRCMS_PREC_VO, /* 6 Vo - Voice */
_BRCMS_PREC_NC, /* 7 NC - Network Control */
};

static u16 xmtfifo_sz[][NFIFO] = {
{20, 192, 192, 21, 17, 5}, /* corerev 20: 5120, 49152, 49152, 5376, 4352, 1280 */
{9, 58, 22, 14, 14, 5}, /* corerev 21: 2304, 14848, 5632, 3584, 3584, 1280 */
{20, 192, 192, 21, 17, 5}, /* corerev 22: 5120, 49152, 49152, 5376, 4352, 1280 */
{20, 192, 192, 21, 17, 5}, /* corerev 23: 5120, 49152, 49152, 5376, 4352, 1280 */
{9, 58, 22, 14, 14, 5}, /* corerev 24: 2304, 14848, 5632, 3584, 3584, 1280 */
};

static const u8 acbitmap2maxprio[] = {
PRIO_8021D_BE, PRIO_8021D_BE, PRIO_8021D_BK, PRIO_8021D_BK,
PRIO_8021D_VI, PRIO_8021D_VI, PRIO_8021D_VI, PRIO_8021D_VI,
PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO,
PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO
};

#ifdef BCMDBG
static const char * const fifo_names[] = {
"AC_BK", "AC_BE", "AC_VI", "AC_VO", "BCMC", "ATIM" };
#else
static const char fifo_names[6][0];
#endif

#ifdef BCMDBG
/* pointer to most recently allocated wl/wlc */
static struct brcms_c_info *wlc_info_dbg = (struct brcms_c_info *) (NULL);
#endif

/*
* Update the slot timing for standard 11b/g (20us slots)
* or shortslot 11g (9us slots)
* The PSM needs to be suspended for this call.
*/
static void brcms_b_update_slot_timing(struct brcms_hardware *wlc_hw,
bool shortslot)
{
struct d11regs *regs;

regs = wlc_hw->regs;

if (shortslot) {
/* 11g short slot: 11a timing */
W_REG(&regs->ifs_slot, 0x0207); /* APHY_SLOT_TIME */
brcms_b_write_shm(wlc_hw, M_DOT11_SLOT, APHY_SLOT_TIME);
} else {
/* 11g long slot: 11b timing */
W_REG(&regs->ifs_slot, 0x0212); /* BPHY_SLOT_TIME */
brcms_b_write_shm(wlc_hw, M_DOT11_SLOT, BPHY_SLOT_TIME);
}
}

static void brcms_c_ucode_bsinit(struct brcms_hardware *wlc_hw)
{
struct wiphy *wiphy = wlc_hw->wlc->wiphy;

/* init microcode host flags */
brcms_c_write_mhf(wlc_hw, wlc_hw->band->mhfs);

/* do band-specific ucode IHR, SHM, and SCR inits */
if (D11REV_IS(wlc_hw->corerev, 23)) {
if (BRCMS_ISNPHY(wlc_hw->band)) {
brcms_c_write_inits(wlc_hw, d11n0bsinitvals16);
} else {
wiphy_err(wiphy, "%s: wl%d: unsupported phy in corerev"
" %d\n", __func__, wlc_hw->unit,
wlc_hw->corerev);
}
} else {
if (D11REV_IS(wlc_hw->corerev, 24)) {
if (BRCMS_ISLCNPHY(wlc_hw->band)) {
brcms_c_write_inits(wlc_hw,
d11lcn0bsinitvals24);
} else
wiphy_err(wiphy, "%s: wl%d: unsupported phy in"
" core rev %d\n", __func__,
wlc_hw->unit, wlc_hw->corerev);
} else {
wiphy_err(wiphy, "%s: wl%d: unsupported corerev %d\n",
__func__, wlc_hw->unit, wlc_hw->corerev);
}
}
}

/* switch to new band but leave it inactive */
static u32 brcms_c_setband_inact(struct brcms_c_info *wlc, uint bandunit)
{
struct brcms_hardware *wlc_hw = wlc->hw;
u32 macintmask;

BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit);

WARN_ON((R_REG(&wlc_hw->regs->maccontrol) & MCTL_EN_MAC) != 0);

/* disable interrupts */
macintmask = brcms_intrsoff(wlc->wl);

/* radio off */
wlc_phy_switch_radio(wlc_hw->band->pi, OFF);

brcms_b_core_phy_clk(wlc_hw, OFF);

brcms_c_setxband(wlc_hw, bandunit);

return macintmask;
}

/* Process received frames */
/*
* Return true if more frames need to be processed. false otherwise.
* Param 'bound' indicates max. # frames to process before break out.
*/
static bool
brcms_b_recv(struct brcms_hardware *wlc_hw, uint fifo, bool bound)
{
struct sk_buff *p;
struct sk_buff *head = NULL;
struct sk_buff *tail = NULL;
uint n = 0;
uint bound_limit = bound ? wlc_hw->wlc->pub->tunables->rxbnd : -1;
struct brcms_d11rxhdr *wlc_rxhdr = NULL;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);
/* gather received frames */
while ((p = dma_rx(wlc_hw->di[fifo]))) {

if (!tail)
head = tail = p;
else {
tail->prev = p;
tail = p;
}

/* !give others some time to run! */
if (++n >= bound_limit)
break;
}

/* post more rbufs */
dma_rxfill(wlc_hw->di[fifo]);

/* process each frame */
while ((p = head) != NULL) {
head = head->prev;
p->prev = NULL;

wlc_rxhdr = (struct brcms_d11rxhdr *) p->data;

/* compute the RSSI from d11rxhdr and record it in wlc_rxd11hr */
wlc_phy_rssi_compute(wlc_hw->band->pi, wlc_rxhdr);

brcms_c_recv(wlc_hw->wlc, p);
}

return n >= bound_limit;
}

static bool
brcms_b_dotxstatus(struct brcms_hardware *wlc_hw, struct tx_status *txs,
u32 s2)
{
/* discard intermediate indications for ucode with one legitimate case:
* e.g. if "useRTS" is set. ucode did a successful rts/cts exchange, but the subsequent
* tx of DATA failed. so it will start rts/cts from the beginning (resetting the rts
* transmission count)
*/
if (!(txs->status & TX_STATUS_AMPDU)
&& (txs->status & TX_STATUS_INTERMEDIATE)) {
return false;
}

return brcms_c_dotxstatus(wlc_hw->wlc, txs, s2);
}

/* process tx completion events in BMAC
* Return true if more tx status need to be processed. false otherwise.
*/
static bool
brcms_b_txstatus(struct brcms_hardware *wlc_hw, bool bound, bool *fatal)
{
bool morepending = false;
struct brcms_c_info *wlc = wlc_hw->wlc;
struct d11regs *regs;
struct tx_status txstatus, *txs;
u32 s1, s2;
uint n = 0;
/*
* Param 'max_tx_num' indicates max. # tx status to process before
* break out.
*/
uint max_tx_num = bound ? wlc->pub->tunables->txsbnd : -1;

BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit);

txs = &txstatus;
regs = wlc_hw->regs;
while (!(*fatal)
&& (s1 = R_REG(&regs->frmtxstatus)) & TXS_V) {

if (s1 == 0xffffffff) {
wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n",
wlc_hw->unit, __func__);
return morepending;
}

s2 = R_REG(&regs->frmtxstatus2);

txs->status = s1 & TXS_STATUS_MASK;
txs->frameid = (s1 & TXS_FID_MASK) >> TXS_FID_SHIFT;
txs->sequence = s2 & TXS_SEQ_MASK;
txs->phyerr = (s2 & TXS_PTX_MASK) >> TXS_PTX_SHIFT;
txs->lasttxtime = 0;

*fatal = brcms_b_dotxstatus(wlc_hw, txs, s2);

/* !give others some time to run! */
if (++n >= max_tx_num)
break;
}

if (*fatal)
return 0;

if (n >= max_tx_num)
morepending = true;

if (!pktq_empty(&wlc->pkt_queue->q))
brcms_c_send_q(wlc);

return morepending;
}

/* second-level interrupt processing
* Return true if another dpc needs to be re-scheduled. false otherwise.
* Param 'bounded' indicates if applicable loops should be bounded.
*/
bool brcms_c_dpc(struct brcms_c_info *wlc, bool bounded)
{
u32 macintstatus;
struct brcms_hardware *wlc_hw = wlc->hw;
struct d11regs *regs = wlc_hw->regs;
bool fatal = false;
struct wiphy *wiphy = wlc->wiphy;

if (DEVICEREMOVED(wlc)) {
wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit,
__func__);
brcms_down(wlc->wl);
return false;
}

/* grab and clear the saved software intstatus bits */
macintstatus = wlc->macintstatus;
wlc->macintstatus = 0;

BCMMSG(wlc->wiphy, "wl%d: macintstatus 0x%x\n",
wlc_hw->unit, macintstatus);

WARN_ON(macintstatus & MI_PRQ); /* PRQ Interrupt in non-MBSS */

/* BCN template is available */
/* ZZZ: Use AP_ACTIVE ? */
if (AP_ENAB(wlc->pub) && (!APSTA_ENAB(wlc->pub))
&& (macintstatus & MI_BCNTPL)) {
brcms_c_update_beacon(wlc);
}

/* tx status */
if (macintstatus & MI_TFS) {
if (brcms_b_txstatus(wlc->hw, bounded, &fatal))
wlc->macintstatus |= MI_TFS;
if (fatal) {
wiphy_err(wiphy, "MI_TFS: fatal\n");
goto fatal;
}
}

if (macintstatus & (MI_TBTT | MI_DTIM_TBTT))
brcms_c_tbtt(wlc);

/* ATIM window end */
if (macintstatus & MI_ATIMWINEND) {
BCMMSG(wlc->wiphy, "end of ATIM window\n");
OR_REG(&regs->maccommand, wlc->qvalid);
wlc->qvalid = 0;
}

/* received data or control frame, MI_DMAINT is indication of RX_FIFO interrupt */
if (macintstatus & MI_DMAINT)
if (brcms_b_recv(wlc_hw, RX_FIFO, bounded))
wlc->macintstatus |= MI_DMAINT;

/* TX FIFO suspend/flush completion */
if (macintstatus & MI_TXSTOP)
brcms_b_tx_fifo_suspended(wlc_hw, TX_DATA_FIFO);

/* noise sample collected */
if (macintstatus & MI_BG_NOISE) {
wlc_phy_noise_sample_intr(wlc_hw->band->pi);
}

if (macintstatus & MI_GP0) {
wiphy_err(wiphy, "wl%d: PSM microcode watchdog fired at %d "
"(seconds). Resetting.\n", wlc_hw->unit, wlc_hw->now);

printk_once("%s : PSM Watchdog, chipid 0x%x, chiprev 0x%x\n",
__func__, wlc_hw->sih->chip,
wlc_hw->sih->chiprev);
/* big hammer */
brcms_init(wlc->wl);
}

/* gptimer timeout */
if (macintstatus & MI_TO) {
W_REG(&regs->gptimer, 0);
}

if (macintstatus & MI_RFDISABLE) {
BCMMSG(wlc->wiphy, "wl%d: BMAC Detected a change on the"
" RF Disable Input\n", wlc_hw->unit);
brcms_rfkill_set_hw_state(wlc->wl);
}

/* send any enq'd tx packets. Just makes sure to jump start tx */
if (!pktq_empty(&wlc->pkt_queue->q))
brcms_c_send_q(wlc);

/* it isn't done and needs to be resched if macintstatus is non-zero */
return wlc->macintstatus != 0;

fatal:
brcms_init(wlc->wl);
return wlc->macintstatus != 0;
}

int brcms_b_state_get(struct brcms_hardware *wlc_hw,
struct brcms_b_state *state)
{
state->machwcap = wlc_hw->machwcap;

return 0;
}

static bool brcms_b_attach_dmapio(struct brcms_c_info *wlc, uint j, bool wme)
{
uint i;
char name[8];
/* ucode host flag 2 needed for pio mode, independent of band and fifo */
u16 pio_mhf2 = 0;
struct brcms_hardware *wlc_hw = wlc->hw;
uint unit = wlc_hw->unit;
struct brcms_tunables *tune = wlc->pub->tunables;
struct wiphy *wiphy = wlc->wiphy;

/* name and offsets for dma_attach */
snprintf(name, sizeof(name), "wl%d", unit);

if (wlc_hw->di[0] == 0) { /* Init FIFOs */
uint addrwidth;
int dma_attach_err = 0;
/* Find out the DMA addressing capability and let OS know
* All the channels within one DMA core have 'common-minimum' same
* capability
*/
addrwidth =
dma_addrwidth(wlc_hw->sih, DMAREG(wlc_hw, DMA_TX, 0));

if (!wl_alloc_dma_resources(wlc_hw->wlc->wl, addrwidth)) {
wiphy_err(wiphy, "wl%d: wlc_attach: alloc_dma_"
"resources failed\n", unit);
return false;
}

/*
* FIFO 0
* TX: TX_AC_BK_FIFO (TX AC Background data packets)
* RX: RX_FIFO (RX data packets)
*/
wlc_hw->di[0] = dma_attach(name, wlc_hw->sih,
(wme ? DMAREG(wlc_hw, DMA_TX, 0) :
NULL), DMAREG(wlc_hw, DMA_RX, 0),
(wme ? tune->ntxd : 0), tune->nrxd,
tune->rxbufsz, -1, tune->nrxbufpost,
BRCMS_HWRXOFF, &brcm_msg_level);
dma_attach_err |= (NULL == wlc_hw->di[0]);

/*
* FIFO 1
* TX: TX_AC_BE_FIFO (TX AC Best-Effort data packets)
* (legacy) TX_DATA_FIFO (TX data packets)
* RX: UNUSED
*/
wlc_hw->di[1] = dma_attach(name, wlc_hw->sih,
DMAREG(wlc_hw, DMA_TX, 1), NULL,
tune->ntxd, 0, 0, -1, 0, 0,
&brcm_msg_level);
dma_attach_err |= (NULL == wlc_hw->di[1]);

/*
* FIFO 2
* TX: TX_AC_VI_FIFO (TX AC Video data packets)
* RX: UNUSED
*/
wlc_hw->di[2] = dma_attach(name, wlc_hw->sih,
DMAREG(wlc_hw, DMA_TX, 2), NULL,
tune->ntxd, 0, 0, -1, 0, 0,
&brcm_msg_level);
dma_attach_err |= (NULL == wlc_hw->di[2]);
/*
* FIFO 3
* TX: TX_AC_VO_FIFO (TX AC Voice data packets)
* (legacy) TX_CTL_FIFO (TX control & mgmt packets)
*/
wlc_hw->di[3] = dma_attach(name, wlc_hw->sih,
DMAREG(wlc_hw, DMA_TX, 3),
NULL, tune->ntxd, 0, 0, -1,
0, 0, &brcm_msg_level);
dma_attach_err |= (NULL == wlc_hw->di[3]);
/* Cleaner to leave this as if with AP defined */

if (dma_attach_err) {
wiphy_err(wiphy, "wl%d: wlc_attach: dma_attach failed"
"\n", unit);
return false;
}

/* get pointer to dma engine tx flow control variable */
for (i = 0; i < NFIFO; i++)
if (wlc_hw->di[i])
wlc_hw->txavail[i] =
(uint *) dma_getvar(wlc_hw->di[i],
"&txavail");
}

/* initial ucode host flags */
brcms_c_mhfdef(wlc, wlc_hw->band->mhfs, pio_mhf2);

return true;
}

static void brcms_b_detach_dmapio(struct brcms_hardware *wlc_hw)
{
uint j;

for (j = 0; j < NFIFO; j++) {
if (wlc_hw->di[j]) {
dma_detach(wlc_hw->di[j]);
wlc_hw->di[j] = NULL;
}
}
}

/*
* Initialize brcms_c_info default values ...
* may get overrides later in this function
* BMAC_NOTES, move low out and resolve the dangling ones
*/
static void brcms_b_info_init(struct brcms_hardware *wlc_hw)
{
struct brcms_c_info *wlc = wlc_hw->wlc;

/* set default sw macintmask value */
wlc->defmacintmask = DEF_MACINTMASK;

/* various 802.11g modes */
wlc_hw->shortslot = false;

wlc_hw->SFBL = RETRY_SHORT_FB;
wlc_hw->LFBL = RETRY_LONG_FB;

/* default mac retry limits */
wlc_hw->SRL = RETRY_SHORT_DEF;
wlc_hw->LRL = RETRY_LONG_DEF;
wlc_hw->chanspec = CH20MHZ_CHSPEC(1);
}

void brcms_b_wait_for_wake(struct brcms_hardware *wlc_hw)
{
/* delay before first read of ucode state */
udelay(40);

/* wait until ucode is no longer asleep */
SPINWAIT((brcms_b_read_shm(wlc_hw, M_UCODE_DBGST) ==
DBGST_ASLEEP), wlc_hw->wlc->fastpwrup_dly);
}

void brcms_b_hw_etheraddr(struct brcms_hardware *wlc_hw, u8 *ea)
{
memcpy(ea, wlc_hw->etheraddr, ETH_ALEN);
}

static int brcms_b_bandtype(struct brcms_hardware *wlc_hw)
{
return wlc_hw->band->bandtype;
}

/* control chip clock to save power, enable dynamic clock or force fast clock */
static void brcms_b_clkctl_clk(struct brcms_hardware *wlc_hw, uint mode)
{
if (PMUCTL_ENAB(wlc_hw->sih)) {
/* new chips with PMU, CCS_FORCEHT will distribute the HT clock on backplane,
* but mac core will still run on ALP(not HT) when it enters powersave mode,
* which means the FCA bit may not be set.
* should wakeup mac if driver wants it to run on HT.
*/

if (wlc_hw->clk) {
if (mode == CLK_FAST) {
OR_REG(&wlc_hw->regs->clk_ctl_st,
CCS_FORCEHT);

udelay(64);

SPINWAIT(((R_REG
(&wlc_hw->regs->
clk_ctl_st) & CCS_HTAVAIL) == 0),
PMU_MAX_TRANSITION_DLY);
WARN_ON(!(R_REG
(&wlc_hw->regs->
clk_ctl_st) & CCS_HTAVAIL));
} else {
if ((wlc_hw->sih->pmurev == 0) &&
(R_REG
(&wlc_hw->regs->
clk_ctl_st) & (CCS_FORCEHT | CCS_HTAREQ)))
SPINWAIT(((R_REG
(&wlc_hw->regs->
clk_ctl_st) & CCS_HTAVAIL)
== 0),
PMU_MAX_TRANSITION_DLY);
AND_REG(&wlc_hw->regs->clk_ctl_st,
~CCS_FORCEHT);
}
}
wlc_hw->forcefastclk = (mode == CLK_FAST);
} else {

/* old chips w/o PMU, force HT through cc,
* then use FCA to verify mac is running fast clock
*/

wlc_hw->forcefastclk = ai_clkctl_cc(wlc_hw->sih, mode);

/* check fast clock is available (if core is not in reset) */
if (wlc_hw->forcefastclk && wlc_hw->clk)
WARN_ON(!(ai_core_sflags(wlc_hw->sih, 0, 0) &
SISF_FCLKA));

/* keep the ucode wake bit on if forcefastclk is on
* since we do not want ucode to put us back to slow clock
* when it dozes for PM mode.
* Code below matches the wake override bit with current forcefastclk state
* Only setting bit in wake_override instead of waking ucode immediately
* since old code (wlc.c 1.4499) had this behavior. Older code set
* wlc->forcefastclk but only had the wake happen if the wakup_ucode work
* (protected by an up check) was executed just below.
*/
if (wlc_hw->forcefastclk)
mboolset(wlc_hw->wake_override,
BRCMS_WAKE_OVERRIDE_FORCEFAST);
else
mboolclr(wlc_hw->wake_override,
BRCMS_WAKE_OVERRIDE_FORCEFAST);
}
}

/* set initial host flags value */
static void
brcms_c_mhfdef(struct brcms_c_info *wlc, u16 *mhfs, u16 mhf2_init)
{
struct brcms_hardware *wlc_hw = wlc->hw;

memset(mhfs, 0, MHFMAX * sizeof(u16));

mhfs[MHF2] |= mhf2_init;

/* prohibit use of slowclock on multifunction boards */
if (wlc_hw->boardflags & BFL_NOPLLDOWN)
mhfs[MHF1] |= MHF1_FORCEFASTCLK;

if (BRCMS_ISNPHY(wlc_hw->band) && NREV_LT(wlc_hw->band->phyrev, 2)) {
mhfs[MHF2] |= MHF2_NPHY40MHZ_WAR;
mhfs[MHF1] |= MHF1_IQSWAP_WAR;
}
}

/* set or clear ucode host flag bits
* it has an optimization for no-change write
* it only writes through shared memory when the core has clock;
* pre-CLK changes should use wlc_write_mhf to get around the optimization
*
*
* bands values are: BRCM_BAND_AUTO <--- Current band only
* BRCM_BAND_5G <--- 5G band only
* BRCM_BAND_2G <--- 2G band only
* BRCM_BAND_ALL <--- All bands
*/
void
brcms_b_mhf(struct brcms_hardware *wlc_hw, u8 idx, u16 mask, u16 val,
int bands)
{
u16 save;
u16 addr[MHFMAX] = {
M_HOST_FLAGS1, M_HOST_FLAGS2, M_HOST_FLAGS3, M_HOST_FLAGS4,
M_HOST_FLAGS5
};
struct brcms_hw_band *band;

if ((val & ~mask) || idx >= MHFMAX)
return; /* error condition */

switch (bands) {
/* Current band only or all bands,
* then set the band to current band
*/
case BRCM_BAND_AUTO:
case BRCM_BAND_ALL:
band = wlc_hw->band;
break;
case BRCM_BAND_5G:
band = wlc_hw->bandstate[BAND_5G_INDEX];
break;
case BRCM_BAND_2G:
band = wlc_hw->bandstate[BAND_2G_INDEX];
break;
default:
band = NULL; /* error condition */
}

if (band) {
save = band->mhfs[idx];
band->mhfs[idx] = (band->mhfs[idx] & ~mask) | val;

/* optimization: only write through if changed, and
* changed band is the current band
*/
if (wlc_hw->clk && (band->mhfs[idx] != save)
&& (band == wlc_hw->band))
brcms_b_write_shm(wlc_hw, addr[idx],
(u16) band->mhfs[idx]);
}

if (bands == BRCM_BAND_ALL) {
wlc_hw->bandstate[0]->mhfs[idx] =
(wlc_hw->bandstate[0]->mhfs[idx] & ~mask) | val;
wlc_hw->bandstate[1]->mhfs[idx] =
(wlc_hw->bandstate[1]->mhfs[idx] & ~mask) | val;
}
}

static void brcms_c_write_mhf(struct brcms_hardware *wlc_hw, u16 *mhfs)
{
u8 idx;
u16 addr[] = {
M_HOST_FLAGS1, M_HOST_FLAGS2, M_HOST_FLAGS3, M_HOST_FLAGS4,
M_HOST_FLAGS5
};

for (idx = 0; idx < MHFMAX; idx++) {
brcms_b_write_shm(wlc_hw, addr[idx], mhfs[idx]);
}
}

/* set the maccontrol register to desired reset state and
* initialize the sw cache of the register
*/
static void brcms_c_mctrl_reset(struct brcms_hardware *wlc_hw)
{
/* IHR accesses are always enabled, PSM disabled, HPS off and WAKE on */
wlc_hw->maccontrol = 0;
wlc_hw->suspended_fifos = 0;
wlc_hw->wake_override = 0;
wlc_hw->mute_override = 0;
brcms_b_mctrl(wlc_hw, ~0, MCTL_IHR_EN | MCTL_WAKE);
}

/* set or clear maccontrol bits */
void brcms_b_mctrl(struct brcms_hardware *wlc_hw, u32 mask, u32 val)
{
u32 maccontrol;
u32 new_maccontrol;

if (val & ~mask)
return; /* error condition */
maccontrol = wlc_hw->maccontrol;
new_maccontrol = (maccontrol & ~mask) | val;

/* if the new maccontrol value is the same as the old, nothing to do */
if (new_maccontrol == maccontrol)
return;

/* something changed, cache the new value */
wlc_hw->maccontrol = new_maccontrol;

/* write the new values with overrides applied */
brcms_c_mctrl_write(wlc_hw);
}

/* write the software state of maccontrol and overrides to the maccontrol register */
static void brcms_c_mctrl_write(struct brcms_hardware *wlc_hw)
{
u32 maccontrol = wlc_hw->maccontrol;

/* OR in the wake bit if overridden */
if (wlc_hw->wake_override)
maccontrol |= MCTL_WAKE;

/* set AP and INFRA bits for mute if needed */
if (wlc_hw->mute_override) {
maccontrol &= ~(MCTL_AP);
maccontrol |= MCTL_INFRA;
}

W_REG(&wlc_hw->regs->maccontrol, maccontrol);
}

void brcms_c_ucode_wake_override_set(struct brcms_hardware *wlc_hw,
u32 override_bit)
{
if (wlc_hw->wake_override || (wlc_hw->maccontrol & MCTL_WAKE)) {
mboolset(wlc_hw->wake_override, override_bit);
return;
}

mboolset(wlc_hw->wake_override, override_bit);

brcms_c_mctrl_write(wlc_hw);
brcms_b_wait_for_wake(wlc_hw);

return;
}

void brcms_c_ucode_wake_override_clear(struct brcms_hardware *wlc_hw,
u32 override_bit)
{
mboolclr(wlc_hw->wake_override, override_bit);

if (wlc_hw->wake_override || (wlc_hw->maccontrol & MCTL_WAKE))
return;

brcms_c_mctrl_write(wlc_hw);

return;
}

/* When driver needs ucode to stop beaconing, it has to make sure that
* MCTL_AP is clear and MCTL_INFRA is set
* Mode MCTL_AP MCTL_INFRA
* AP 1 1
* STA 0 1 <--- This will ensure no beacons
* IBSS 0 0
*/
static void brcms_c_ucode_mute_override_set(struct brcms_hardware *wlc_hw)
{
wlc_hw->mute_override = 1;

/* if maccontrol already has AP == 0 and INFRA == 1 without this
* override, then there is no change to write
*/
if ((wlc_hw->maccontrol & (MCTL_AP | MCTL_INFRA)) == MCTL_INFRA)
return;

brcms_c_mctrl_write(wlc_hw);

return;
}

/* Clear the override on AP and INFRA bits */
static void brcms_c_ucode_mute_override_clear(struct brcms_hardware *wlc_hw)
{
if (wlc_hw->mute_override == 0)
return;

wlc_hw->mute_override = 0;

/* if maccontrol already has AP == 0 and INFRA == 1 without this
* override, then there is no change to write
*/
if ((wlc_hw->maccontrol & (MCTL_AP | MCTL_INFRA)) == MCTL_INFRA)
return;

brcms_c_mctrl_write(wlc_hw);
}

/*
* Write a MAC address to the given match reg offset in the RXE match engine.
*/
void
brcms_b_set_addrmatch(struct brcms_hardware *wlc_hw, int match_reg_offset,
const u8 *addr)
{
struct d11regs *regs;
u16 mac_l;
u16 mac_m;
u16 mac_h;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d: brcms_b_set_addrmatch\n",
wlc_hw->unit);

regs = wlc_hw->regs;
mac_l = addr[0] | (addr[1] << 8);
mac_m = addr[2] | (addr[3] << 8);
mac_h = addr[4] | (addr[5] << 8);

/* enter the MAC addr into the RXE match registers */
W_REG(&regs->rcm_ctl, RCM_INC_DATA | match_reg_offset);
W_REG(&regs->rcm_mat_data, mac_l);
W_REG(&regs->rcm_mat_data, mac_m);
W_REG(&regs->rcm_mat_data, mac_h);

}

void
brcms_b_write_template_ram(struct brcms_hardware *wlc_hw, int offset, int len,
void *buf)
{
struct d11regs *regs;
u32 word;
bool be_bit;
BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

regs = wlc_hw->regs;
W_REG(&regs->tplatewrptr, offset);

/* if MCTL_BIGEND bit set in mac control register,
* the chip swaps data in fifo, as well as data in
* template ram
*/
be_bit = (R_REG(&regs->maccontrol) & MCTL_BIGEND) != 0;

while (len > 0) {
memcpy(&word, buf, sizeof(u32));

if (be_bit)
word = cpu_to_be32(word);
else
word = cpu_to_le32(word);

W_REG(&regs->tplatewrdata, word);

buf = (u8 *) buf + sizeof(u32);
len -= sizeof(u32);
}
}

void brcms_b_set_cwmin(struct brcms_hardware *wlc_hw, u16 newmin)
{
wlc_hw->band->CWmin = newmin;

W_REG(&wlc_hw->regs->objaddr, OBJADDR_SCR_SEL | S_DOT11_CWMIN);
(void)R_REG(&wlc_hw->regs->objaddr);
W_REG(&wlc_hw->regs->objdata, newmin);
}

void brcms_b_set_cwmax(struct brcms_hardware *wlc_hw, u16 newmax)
{
wlc_hw->band->CWmax = newmax;

W_REG(&wlc_hw->regs->objaddr, OBJADDR_SCR_SEL | S_DOT11_CWMAX);
(void)R_REG(&wlc_hw->regs->objaddr);
W_REG(&wlc_hw->regs->objdata, newmax);
}

void brcms_b_bw_set(struct brcms_hardware *wlc_hw, u16 bw)
{
bool fastclk;

/* request FAST clock if not on */
fastclk = wlc_hw->forcefastclk;
if (!fastclk)
brcms_b_clkctl_clk(wlc_hw, CLK_FAST);

wlc_phy_bw_state_set(wlc_hw->band->pi, bw);

brcms_b_phy_reset(wlc_hw);
wlc_phy_init(wlc_hw->band->pi, wlc_phy_chanspec_get(wlc_hw->band->pi));

/* restore the clk */
if (!fastclk)
brcms_b_clkctl_clk(wlc_hw, CLK_DYNAMIC);
}

static void
brcms_c_write_hw_bcntemplate0(struct brcms_hardware *wlc_hw, void *bcn,
int len)
{
struct d11regs *regs = wlc_hw->regs;

brcms_b_write_template_ram(wlc_hw, T_BCN0_TPL_BASE, (len + 3) & ~3,
bcn);
/* write beacon length to SCR */
brcms_b_write_shm(wlc_hw, M_BCN0_FRM_BYTESZ, (u16) len);
/* mark beacon0 valid */
OR_REG(&regs->maccommand, MCMD_BCN0VLD);
}

static void
brcms_c_write_hw_bcntemplate1(struct brcms_hardware *wlc_hw, void *bcn,
int len)
{
struct d11regs *regs = wlc_hw->regs;

brcms_b_write_template_ram(wlc_hw, T_BCN1_TPL_BASE, (len + 3) & ~3,
bcn);
/* write beacon length to SCR */
brcms_b_write_shm(wlc_hw, M_BCN1_FRM_BYTESZ, (u16) len);
/* mark beacon1 valid */
OR_REG(&regs->maccommand, MCMD_BCN1VLD);
}

static void brcms_b_upd_synthpu(struct brcms_hardware *wlc_hw)
{
u16 v;
struct brcms_c_info *wlc = wlc_hw->wlc;
/* update SYNTHPU_DLY */

if (BRCMS_ISLCNPHY(wlc->band)) {
v = SYNTHPU_DLY_LPPHY_US;
} else if (BRCMS_ISNPHY(wlc->band) && (NREV_GE(wlc->band->phyrev, 3))) {
v = SYNTHPU_DLY_NPHY_US;
} else {
v = SYNTHPU_DLY_BPHY_US;
}

brcms_b_write_shm(wlc_hw, M_SYNTHPU_DLY, v);
}

/* band-specific init */
static void brcms_b_bsinit(struct brcms_c_info *wlc, u16 chanspec)
{
struct brcms_hardware *wlc_hw = wlc->hw;

BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit,
wlc_hw->band->bandunit);

brcms_c_ucode_bsinit(wlc_hw);

wlc_phy_init(wlc_hw->band->pi, chanspec);

brcms_c_ucode_txant_set(wlc_hw);

/* cwmin is band-specific, update hardware with value for current band */
brcms_b_set_cwmin(wlc_hw, wlc_hw->band->CWmin);
brcms_b_set_cwmax(wlc_hw, wlc_hw->band->CWmax);

brcms_b_update_slot_timing(wlc_hw,
BAND_5G(wlc_hw->band->
bandtype) ? true : wlc_hw->
shortslot);

/* write phytype and phyvers */
brcms_b_write_shm(wlc_hw, M_PHYTYPE, (u16) wlc_hw->band->phytype);
brcms_b_write_shm(wlc_hw, M_PHYVER, (u16) wlc_hw->band->phyrev);

/* initialize the txphyctl1 rate table since shmem is shared between bands */
brcms_upd_ofdm_pctl1_table(wlc_hw);

brcms_b_upd_synthpu(wlc_hw);
}

static void brcms_b_core_phy_clk(struct brcms_hardware *wlc_hw, bool clk)
{
BCMMSG(wlc_hw->wlc->wiphy, "wl%d: clk %d\n", wlc_hw->unit, clk);

wlc_hw->phyclk = clk;

if (OFF == clk) { /* clear gmode bit, put phy into reset */

ai_core_cflags(wlc_hw->sih, (SICF_PRST | SICF_FGC | SICF_GMODE),
(SICF_PRST | SICF_FGC));
udelay(1);
ai_core_cflags(wlc_hw->sih, (SICF_PRST | SICF_FGC), SICF_PRST);
udelay(1);

} else { /* take phy out of reset */

ai_core_cflags(wlc_hw->sih, (SICF_PRST | SICF_FGC), SICF_FGC);
udelay(1);
ai_core_cflags(wlc_hw->sih, (SICF_FGC), 0);
udelay(1);

}
}

/* Perform a soft reset of the PHY PLL */
void brcms_b_core_phypll_reset(struct brcms_hardware *wlc_hw)
{
BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

ai_corereg(wlc_hw->sih, SI_CC_IDX,
offsetof(struct chipcregs, chipcontrol_addr), ~0, 0);
udelay(1);
ai_corereg(wlc_hw->sih, SI_CC_IDX,
offsetof(struct chipcregs, chipcontrol_data), 0x4, 0);
udelay(1);
ai_corereg(wlc_hw->sih, SI_CC_IDX,
offsetof(struct chipcregs, chipcontrol_data), 0x4, 4);
udelay(1);
ai_corereg(wlc_hw->sih, SI_CC_IDX,
offsetof(struct chipcregs, chipcontrol_data), 0x4, 0);
udelay(1);
}

/* light way to turn on phy clock without reset for NPHY only
* refer to brcms_b_core_phy_clk for full version
*/
void brcms_b_phyclk_fgc(struct brcms_hardware *wlc_hw, bool clk)
{
/* support(necessary for NPHY and HYPHY) only */
if (!BRCMS_ISNPHY(wlc_hw->band))
return;

if (ON == clk)
ai_core_cflags(wlc_hw->sih, SICF_FGC, SICF_FGC);
else
ai_core_cflags(wlc_hw->sih, SICF_FGC, 0);

}

void brcms_b_macphyclk_set(struct brcms_hardware *wlc_hw, bool clk)
{
if (ON == clk)
ai_core_cflags(wlc_hw->sih, SICF_MPCLKE, SICF_MPCLKE);
else
ai_core_cflags(wlc_hw->sih, SICF_MPCLKE, 0);
}

void brcms_b_phy_reset(struct brcms_hardware *wlc_hw)
{
struct brcms_phy_pub *pih = wlc_hw->band->pi;
u32 phy_bw_clkbits;
bool phy_in_reset = false;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

if (pih == NULL)
return;

phy_bw_clkbits = wlc_phy_clk_bwbits(wlc_hw->band->pi);

/* Specific reset sequence required for NPHY rev 3 and 4 */
if (BRCMS_ISNPHY(wlc_hw->band) && NREV_GE(wlc_hw->band->phyrev, 3) &&
NREV_LE(wlc_hw->band->phyrev, 4)) {
/* Set the PHY bandwidth */
ai_core_cflags(wlc_hw->sih, SICF_BWMASK, phy_bw_clkbits);

udelay(1);

/* Perform a soft reset of the PHY PLL */
brcms_b_core_phypll_reset(wlc_hw);

/* reset the PHY */
ai_core_cflags(wlc_hw->sih, (SICF_PRST | SICF_PCLKE),
(SICF_PRST | SICF_PCLKE));
phy_in_reset = true;
} else {

ai_core_cflags(wlc_hw->sih,
(SICF_PRST | SICF_PCLKE | SICF_BWMASK),
(SICF_PRST | SICF_PCLKE | phy_bw_clkbits));
}

udelay(2);
brcms_b_core_phy_clk(wlc_hw, ON);

if (pih)
wlc_phy_anacore(pih, ON);
}

/* switch to and initialize new band */
static void brcms_b_setband(struct brcms_hardware *wlc_hw, uint bandunit,
u16 chanspec) {
struct brcms_c_info *wlc = wlc_hw->wlc;
u32 macintmask;

/* Enable the d11 core before accessing it */
if (!ai_iscoreup(wlc_hw->sih)) {
ai_core_reset(wlc_hw->sih, 0, 0);
brcms_c_mctrl_reset(wlc_hw);
}

macintmask = brcms_c_setband_inact(wlc, bandunit);

if (!wlc_hw->up)
return;

brcms_b_core_phy_clk(wlc_hw, ON);

/* band-specific initializations */
brcms_b_bsinit(wlc, chanspec);

/*
* If there are any pending software interrupt bits,
* then replace these with a harmless nonzero value
* so brcms_c_dpc() will re-enable interrupts when done.
*/
if (wlc->macintstatus)
wlc->macintstatus = MI_DMAINT;

/* restore macintmask */
brcms_intrsrestore(wlc->wl, macintmask);

/* ucode should still be suspended.. */
WARN_ON((R_REG(&wlc_hw->regs->maccontrol) & MCTL_EN_MAC) != 0);
}

/* low-level band switch utility routine */
void brcms_c_setxband(struct brcms_hardware *wlc_hw, uint bandunit)
{
BCMMSG(wlc_hw->wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit,
bandunit);

wlc_hw->band = wlc_hw->bandstate[bandunit];

/* BMAC_NOTE: until we eliminate need for wlc->band refs in low level code */
wlc_hw->wlc->band = wlc_hw->wlc->bandstate[bandunit];

/* set gmode core flag */
if (wlc_hw->sbclk && !wlc_hw->noreset) {
ai_core_cflags(wlc_hw->sih, SICF_GMODE,
((bandunit == 0) ? SICF_GMODE : 0));
}
}

static bool brcms_c_isgoodchip(struct brcms_hardware *wlc_hw)
{

/* reject unsupported corerev */
if (!VALID_COREREV(wlc_hw->corerev)) {
wiphy_err(wlc_hw->wlc->wiphy, "unsupported core rev %d\n",
wlc_hw->corerev);
return false;
}

return true;
}

/* Validate some board info parameters */
static bool brcms_c_validboardtype(struct brcms_hardware *wlc_hw)
{
uint boardrev = wlc_hw->boardrev;

/* 4 bits each for board type, major, minor, and tiny version */
uint brt = (boardrev & 0xf000) >> 12;
uint b0 = (boardrev & 0xf00) >> 8;
uint b1 = (boardrev & 0xf0) >> 4;
uint b2 = boardrev & 0xf;

/* voards from other vendors are always considered valid */
if (wlc_hw->sih->boardvendor != PCI_VENDOR_ID_BROADCOM)
return true;

/* do some boardrev sanity checks when boardvendor is Broadcom */
if (boardrev == 0)
return false;

if (boardrev <= 0xff)
return true;

if ((brt > 2) || (brt == 0) || (b0 > 9) || (b0 == 0) || (b1 > 9)
|| (b2 > 9))
return false;

return true;
}

static char *brcms_c_get_macaddr(struct brcms_hardware *wlc_hw)
{
const char *varname = "macaddr";
char *macaddr;

/* If macaddr exists, use it (Sromrev4, CIS, ...). */
macaddr = getvar(wlc_hw->vars, varname);
if (macaddr != NULL)
return macaddr;

if (NBANDS_HW(wlc_hw) > 1)
varname = "et1macaddr";
else
varname = "il0macaddr";

macaddr = getvar(wlc_hw->vars, varname);
if (macaddr == NULL) {
wiphy_err(wlc_hw->wlc->wiphy, "wl%d: wlc_get_macaddr: macaddr "
"getvar(%s) not found\n", wlc_hw->unit, varname);
}

return macaddr;
}

/*
* Return true if radio is disabled, otherwise false.
* hw radio disable signal is an external pin, users activate it asynchronously
* this function could be called when driver is down and w/o clock
* it operates on different registers depending on corerev and boardflag.
*/
bool brcms_b_radio_read_hwdisabled(struct brcms_hardware *wlc_hw)
{
bool v, clk, xtal;
u32 resetbits = 0, flags = 0;

xtal = wlc_hw->sbclk;
if (!xtal)
brcms_b_xtal(wlc_hw, ON);

/* may need to take core out of reset first */
clk = wlc_hw->clk;
if (!clk) {
/*
* mac no longer enables phyclk automatically when driver
* accesses phyreg throughput mac. This can be skipped since
* only mac reg is accessed below
*/
flags |= SICF_PCLKE;

/* AI chip doesn't restore bar0win2 on hibernation/resume, need sw fixup */
if ((wlc_hw->sih->chip == BCM43224_CHIP_ID) ||
(wlc_hw->sih->chip == BCM43225_CHIP_ID))
wlc_hw->regs = (struct d11regs *)
ai_setcore(wlc_hw->sih, D11_CORE_ID, 0);
ai_core_reset(wlc_hw->sih, flags, resetbits);
brcms_c_mctrl_reset(wlc_hw);
}

v = ((R_REG(&wlc_hw->regs->phydebug) & PDBG_RFD) != 0);

/* put core back into reset */
if (!clk)
ai_core_disable(wlc_hw->sih, 0);

if (!xtal)
brcms_b_xtal(wlc_hw, OFF);

return v;
}

static bool wlc_dma_rxreset(struct brcms_hardware *wlc_hw, uint fifo)
{
struct dma_pub *di = wlc_hw->di[fifo];
return dma_rxreset(di);
}

/* d11 core reset
* ensure fask clock during reset
* reset dma
* reset d11(out of reset)
* reset phy(out of reset)
* clear software macintstatus for fresh new start
* one testing hack wlc_hw->noreset will bypass the d11/phy reset
*/
void brcms_b_corereset(struct brcms_hardware *wlc_hw, u32 flags)
{
struct d11regs *regs;
uint i;
bool fastclk;
u32 resetbits = 0;

if (flags == BRCMS_USE_COREFLAGS)
flags = (wlc_hw->band->pi ? wlc_hw->band->core_flags : 0);

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

regs = wlc_hw->regs;

/* request FAST clock if not on */
fastclk = wlc_hw->forcefastclk;
if (!fastclk)
brcms_b_clkctl_clk(wlc_hw, CLK_FAST);

/* reset the dma engines except first time thru */
if (ai_iscoreup(wlc_hw->sih)) {
for (i = 0; i < NFIFO; i++)
if ((wlc_hw->di[i]) && (!dma_txreset(wlc_hw->di[i]))) {
wiphy_err(wlc_hw->wlc->wiphy, "wl%d: %s: "
"dma_txreset[%d]: cannot stop dma\n",
wlc_hw->unit, __func__, i);
}

if ((wlc_hw->di[RX_FIFO])
&& (!wlc_dma_rxreset(wlc_hw, RX_FIFO))) {
wiphy_err(wlc_hw->wlc->wiphy, "wl%d: %s: dma_rxreset"
"[%d]: cannot stop dma\n",
wlc_hw->unit, __func__, RX_FIFO);
}
}
/* if noreset, just stop the psm and return */
if (wlc_hw->noreset) {
wlc_hw->wlc->macintstatus = 0; /* skip wl_dpc after down */
brcms_b_mctrl(wlc_hw, MCTL_PSM_RUN | MCTL_EN_MAC, 0);
return;
}

/*
* mac no longer enables phyclk automatically when driver accesses
* phyreg throughput mac, AND phy_reset is skipped at early stage when
* band->pi is invalid. need to enable PHY CLK
*/
flags |= SICF_PCLKE;

/* reset the core
* In chips with PMU, the fastclk request goes through d11 core reg 0x1e0, which
* is cleared by the core_reset. have to re-request it.
* This adds some delay and we can optimize it by also requesting fastclk through
* chipcommon during this period if necessary. But that has to work coordinate
* with other driver like mips/arm since they may touch chipcommon as well.
*/
wlc_hw->clk = false;
ai_core_reset(wlc_hw->sih, flags, resetbits);
wlc_hw->clk = true;
if (wlc_hw->band && wlc_hw->band->pi)
wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, true);

brcms_c_mctrl_reset(wlc_hw);

if (PMUCTL_ENAB(wlc_hw->sih))
brcms_b_clkctl_clk(wlc_hw, CLK_FAST);

brcms_b_phy_reset(wlc_hw);

/* turn on PHY_PLL */
brcms_b_core_phypll_ctl(wlc_hw, true);

/* clear sw intstatus */
wlc_hw->wlc->macintstatus = 0;

/* restore the clk setting */
if (!fastclk)
brcms_b_clkctl_clk(wlc_hw, CLK_DYNAMIC);
}

/* txfifo sizes needs to be modified(increased) since the newer cores
* have more memory.
*/
static void brcms_b_corerev_fifofixup(struct brcms_hardware *wlc_hw)
{
struct d11regs *regs = wlc_hw->regs;
u16 fifo_nu;
u16 txfifo_startblk = TXFIFO_START_BLK, txfifo_endblk;
u16 txfifo_def, txfifo_def1;
u16 txfifo_cmd;

/* tx fifos start at TXFIFO_START_BLK from the Base address */
txfifo_startblk = TXFIFO_START_BLK;

/* sequence of operations: reset fifo, set fifo size, reset fifo */
for (fifo_nu = 0; fifo_nu < NFIFO; fifo_nu++) {

txfifo_endblk = txfifo_startblk + wlc_hw->xmtfifo_sz[fifo_nu];
txfifo_def = (txfifo_startblk & 0xff) |
(((txfifo_endblk - 1) & 0xff) << TXFIFO_FIFOTOP_SHIFT);
txfifo_def1 = ((txfifo_startblk >> 8) & 0x1) |
((((txfifo_endblk -
1) >> 8) & 0x1) << TXFIFO_FIFOTOP_SHIFT);
txfifo_cmd =
TXFIFOCMD_RESET_MASK | (fifo_nu << TXFIFOCMD_FIFOSEL_SHIFT);

W_REG(&regs->xmtfifocmd, txfifo_cmd);
W_REG(&regs->xmtfifodef, txfifo_def);
W_REG(&regs->xmtfifodef1, txfifo_def1);

W_REG(&regs->xmtfifocmd, txfifo_cmd);

txfifo_startblk += wlc_hw->xmtfifo_sz[fifo_nu];
}
/*
* need to propagate to shm location to be in sync since ucode/hw won't
* do this
*/
brcms_b_write_shm(wlc_hw, M_FIFOSIZE0,
wlc_hw->xmtfifo_sz[TX_AC_BE_FIFO]);
brcms_b_write_shm(wlc_hw, M_FIFOSIZE1,
wlc_hw->xmtfifo_sz[TX_AC_VI_FIFO]);
brcms_b_write_shm(wlc_hw, M_FIFOSIZE2,
((wlc_hw->xmtfifo_sz[TX_AC_VO_FIFO] << 8) | wlc_hw->
xmtfifo_sz[TX_AC_BK_FIFO]));
brcms_b_write_shm(wlc_hw, M_FIFOSIZE3,
((wlc_hw->xmtfifo_sz[TX_ATIM_FIFO] << 8) | wlc_hw->
xmtfifo_sz[TX_BCMC_FIFO]));
}

/* This function is used for changing the tsf frac register
* If spur avoidance mode is off, the mac freq will be 80/120/160Mhz
* If spur avoidance mode is on1, the mac freq will be 82/123/164Mhz
* If spur avoidance mode is on2, the mac freq will be 84/126/168Mhz
* HTPHY Formula is 2^26/freq(MHz) e.g.
* For spuron2 - 126MHz -> 2^26/126 = 532610.0
* - 532610 = 0x82082 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x2082
* For spuron: 123MHz -> 2^26/123 = 545600.5
* - 545601 = 0x85341 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x5341
* For spur off: 120MHz -> 2^26/120 = 559240.5
* - 559241 = 0x88889 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x8889
*/

void brcms_b_switch_macfreq(struct brcms_hardware *wlc_hw, u8 spurmode)
{
struct d11regs *regs;
regs = wlc_hw->regs;

if ((wlc_hw->sih->chip == BCM43224_CHIP_ID) ||
(wlc_hw->sih->chip == BCM43225_CHIP_ID)) {
if (spurmode == WL_SPURAVOID_ON2) { /* 126Mhz */
W_REG(&regs->tsf_clk_frac_l, 0x2082);
W_REG(&regs->tsf_clk_frac_h, 0x8);
} else if (spurmode == WL_SPURAVOID_ON1) { /* 123Mhz */
W_REG(&regs->tsf_clk_frac_l, 0x5341);
W_REG(&regs->tsf_clk_frac_h, 0x8);
} else { /* 120Mhz */
W_REG(&regs->tsf_clk_frac_l, 0x8889);
W_REG(&regs->tsf_clk_frac_h, 0x8);
}
} else if (BRCMS_ISLCNPHY(wlc_hw->band)) {
if (spurmode == WL_SPURAVOID_ON1) { /* 82Mhz */
W_REG(&regs->tsf_clk_frac_l, 0x7CE0);
W_REG(&regs->tsf_clk_frac_h, 0xC);
} else { /* 80Mhz */
W_REG(&regs->tsf_clk_frac_l, 0xCCCD);
W_REG(&regs->tsf_clk_frac_h, 0xC);
}
}
}

/* Initialize GPIOs that are controlled by D11 core */
static void brcms_c_gpio_init(struct brcms_c_info *wlc)
{
struct brcms_hardware *wlc_hw = wlc->hw;
struct d11regs *regs;
u32 gc, gm;

regs = wlc_hw->regs;

/* use GPIO select 0 to get all gpio signals from the gpio out reg */
brcms_b_mctrl(wlc_hw, MCTL_GPOUT_SEL_MASK, 0);

/*
* Common GPIO setup:
* G0 = LED 0 = WLAN Activity
* G1 = LED 1 = WLAN 2.4 GHz Radio State
* G2 = LED 2 = WLAN 5 GHz Radio State
* G4 = radio disable input (HI enabled, LO disabled)
*/

gc = gm = 0;

/* Allocate GPIOs for mimo antenna diversity feature */
if (wlc_hw->antsel_type == ANTSEL_2x3) {
/* Enable antenna diversity, use 2x3 mode */
brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_EN,
MHF3_ANTSEL_EN, BRCM_BAND_ALL);
brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_MODE,
MHF3_ANTSEL_MODE, BRCM_BAND_ALL);

/* init superswitch control */
wlc_phy_antsel_init(wlc_hw->band->pi, false);

} else if (wlc_hw->antsel_type == ANTSEL_2x4) {
gm |= gc |= (BOARD_GPIO_12 | BOARD_GPIO_13);
/*
* The board itself is powered by these GPIOs
* (when not sending pattern) so set them high
*/
OR_REG(&regs->psm_gpio_oe,
(BOARD_GPIO_12 | BOARD_GPIO_13));
OR_REG(&regs->psm_gpio_out,
(BOARD_GPIO_12 | BOARD_GPIO_13));

/* Enable antenna diversity, use 2x4 mode */
brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_EN,
MHF3_ANTSEL_EN, BRCM_BAND_ALL);
brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_MODE, 0,
BRCM_BAND_ALL);

/* Configure the desired clock to be 4Mhz */
brcms_b_write_shm(wlc_hw, M_ANTSEL_CLKDIV,
ANTSEL_CLKDIV_4MHZ);
}

/* gpio 9 controls the PA. ucode is responsible for wiggling out and oe */
if (wlc_hw->boardflags & BFL_PACTRL)
gm |= gc |= BOARD_GPIO_PACTRL;

/* apply to gpiocontrol register */
ai_gpiocontrol(wlc_hw->sih, gm, gc, GPIO_DRV_PRIORITY);
}

static void brcms_ucode_download(struct brcms_hardware *wlc_hw)
{
struct brcms_c_info *wlc;
wlc = wlc_hw->wlc;

if (wlc_hw->ucode_loaded)
return;

if (D11REV_IS(wlc_hw->corerev, 23)) {
if (BRCMS_ISNPHY(wlc_hw->band)) {
brcms_ucode_write(wlc_hw, bcm43xx_16_mimo,
bcm43xx_16_mimosz);
wlc_hw->ucode_loaded = true;
} else
wiphy_err(wlc->wiphy, "%s: wl%d: unsupported phy in "
"corerev %d\n",
__func__, wlc_hw->unit, wlc_hw->corerev);
} else if (D11REV_IS(wlc_hw->corerev, 24)) {
if (BRCMS_ISLCNPHY(wlc_hw->band)) {
brcms_ucode_write(wlc_hw, bcm43xx_24_lcn,
bcm43xx_24_lcnsz);
wlc_hw->ucode_loaded = true;
} else {
wiphy_err(wlc->wiphy, "%s: wl%d: unsupported phy in "
"corerev %d\n",
__func__, wlc_hw->unit, wlc_hw->corerev);
}
}
}

static void brcms_ucode_write(struct brcms_hardware *wlc_hw, const u32 ucode[],
const uint nbytes) {
struct d11regs *regs = wlc_hw->regs;
uint i;
uint count;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

count = (nbytes / sizeof(u32));

W_REG(&regs->objaddr, (OBJADDR_AUTO_INC | OBJADDR_UCM_SEL));
(void)R_REG(&regs->objaddr);
for (i = 0; i < count; i++)
W_REG(&regs->objdata, ucode[i]);
}

static void brcms_c_write_inits(struct brcms_hardware *wlc_hw,
const struct d11init *inits)
{
int i;
volatile u8 *base;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

base = (volatile u8 *)wlc_hw->regs;

for (i = 0; inits[i].addr != 0xffff; i++) {
if (inits[i].size == 2)
W_REG((u16 *)(base + inits[i].addr),
inits[i].value);
else if (inits[i].size == 4)
W_REG((u32 *)(base + inits[i].addr),
inits[i].value);
}
}

static void brcms_c_ucode_txant_set(struct brcms_hardware *wlc_hw)
{
u16 phyctl;
u16 phytxant = wlc_hw->bmac_phytxant;
u16 mask = PHY_TXC_ANT_MASK;

/* set the Probe Response frame phy control word */
phyctl = brcms_b_read_shm(wlc_hw, M_CTXPRS_BLK + C_CTX_PCTLWD_POS);
phyctl = (phyctl & ~mask) | phytxant;
brcms_b_write_shm(wlc_hw, M_CTXPRS_BLK + C_CTX_PCTLWD_POS, phyctl);

/* set the Response (ACK/CTS) frame phy control word */
phyctl = brcms_b_read_shm(wlc_hw, M_RSP_PCTLWD);
phyctl = (phyctl & ~mask) | phytxant;
brcms_b_write_shm(wlc_hw, M_RSP_PCTLWD, phyctl);
}

void brcms_b_txant_set(struct brcms_hardware *wlc_hw, u16 phytxant)
{
/* update sw state */
wlc_hw->bmac_phytxant = phytxant;

/* push to ucode if up */
if (!wlc_hw->up)
return;
brcms_c_ucode_txant_set(wlc_hw);

}

u16 brcms_b_get_txant(struct brcms_hardware *wlc_hw)
{
return (u16) wlc_hw->wlc->stf->txant;
}

void brcms_b_antsel_type_set(struct brcms_hardware *wlc_hw, u8 antsel_type)
{
wlc_hw->antsel_type = antsel_type;

/* Update the antsel type for phy module to use */
wlc_phy_antsel_type_set(wlc_hw->band->pi, antsel_type);
}

void brcms_b_fifoerrors(struct brcms_hardware *wlc_hw)
{
bool fatal = false;
uint unit;
uint intstatus, idx;
struct d11regs *regs = wlc_hw->regs;
struct wiphy *wiphy = wlc_hw->wlc->wiphy;

unit = wlc_hw->unit;

for (idx = 0; idx < NFIFO; idx++) {
/* read intstatus register and ignore any non-error bits */
intstatus =
R_REG(&regs->intctrlregs[idx].intstatus) & I_ERRORS;
if (!intstatus)
continue;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d: intstatus%d 0x%x\n",
unit, idx, intstatus);

if (intstatus & I_RO) {
wiphy_err(wiphy, "wl%d: fifo %d: receive fifo "
"overflow\n", unit, idx);
fatal = true;
}

if (intstatus & I_PC) {
wiphy_err(wiphy, "wl%d: fifo %d: descriptor error\n",
unit, idx);
fatal = true;
}

if (intstatus & I_PD) {
wiphy_err(wiphy, "wl%d: fifo %d: data error\n", unit,
idx);
fatal = true;
}

if (intstatus & I_DE) {
wiphy_err(wiphy, "wl%d: fifo %d: descriptor protocol "
"error\n", unit, idx);
fatal = true;
}

if (intstatus & I_RU) {
wiphy_err(wiphy, "wl%d: fifo %d: receive descriptor "
"underflow\n", idx, unit);
}

if (intstatus & I_XU) {
wiphy_err(wiphy, "wl%d: fifo %d: transmit fifo "
"underflow\n", idx, unit);
fatal = true;
}

if (fatal) {
brcms_c_fatal_error(wlc_hw->wlc); /* big hammer */
break;
} else
W_REG(&regs->intctrlregs[idx].intstatus,
intstatus);
}
}

void brcms_c_intrson(struct brcms_c_info *wlc)
{
struct brcms_hardware *wlc_hw = wlc->hw;
wlc->macintmask = wlc->defmacintmask;
W_REG(&wlc_hw->regs->macintmask, wlc->macintmask);
}

/* callback for siutils.c, which has only wlc handler, no wl
* they both check up, not only because there is no need to off/restore d11 interrupt
* but also because per-port code may require sync with valid interrupt.
*/

static u32 brcms_c_wlintrsoff(struct brcms_c_info *wlc)
{
if (!wlc->hw->up)
return 0;

return brcms_intrsoff(wlc->wl);
}

static void brcms_c_wlintrsrestore(struct brcms_c_info *wlc, u32 macintmask)
{
if (!wlc->hw->up)
return;

brcms_intrsrestore(wlc->wl, macintmask);
}

u32 brcms_c_intrsoff(struct brcms_c_info *wlc)
{
struct brcms_hardware *wlc_hw = wlc->hw;
u32 macintmask;

if (!wlc_hw->clk)
return 0;

macintmask = wlc->macintmask; /* isr can still happen */

W_REG(&wlc_hw->regs->macintmask, 0);
(void)R_REG(&wlc_hw->regs->macintmask); /* sync readback */
udelay(1); /* ensure int line is no longer driven */
wlc->macintmask = 0;

/* return previous macintmask; resolve race between us and our isr */
return wlc->macintstatus ? 0 : macintmask;
}

void brcms_c_intrsrestore(struct brcms_c_info *wlc, u32 macintmask)
{
struct brcms_hardware *wlc_hw = wlc->hw;
if (!wlc_hw->clk)
return;

wlc->macintmask = macintmask;
W_REG(&wlc_hw->regs->macintmask, wlc->macintmask);
}

static void brcms_b_tx_fifo_suspend(struct brcms_hardware *wlc_hw,
uint tx_fifo)
{
u8 fifo = 1 << tx_fifo;

/* Two clients of this code, 11h Quiet period and scanning. */

/* only suspend if not already suspended */
if ((wlc_hw->suspended_fifos & fifo) == fifo)
return;

/* force the core awake only if not already */
if (wlc_hw->suspended_fifos == 0)
brcms_c_ucode_wake_override_set(wlc_hw,
BRCMS_WAKE_OVERRIDE_TXFIFO);

wlc_hw->suspended_fifos |= fifo;

if (wlc_hw->di[tx_fifo]) {
/* Suspending AMPDU transmissions in the middle can cause underflow
* which may result in mismatch between ucode and driver
* so suspend the mac before suspending the FIFO
*/
if (BRCMS_PHY_11N_CAP(wlc_hw->band))
brcms_c_suspend_mac_and_wait(wlc_hw->wlc);

dma_txsuspend(wlc_hw->di[tx_fifo]);

if (BRCMS_PHY_11N_CAP(wlc_hw->band))
brcms_c_enable_mac(wlc_hw->wlc);
}
}

static void brcms_b_mute(struct brcms_hardware *wlc_hw, bool on, u32 flags)
{
u8 null_ether_addr[ETH_ALEN] = {0, 0, 0, 0, 0, 0};

if (on) {
/* suspend tx fifos */
brcms_b_tx_fifo_suspend(wlc_hw, TX_DATA_FIFO);
brcms_b_tx_fifo_suspend(wlc_hw, TX_CTL_FIFO);
brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_BK_FIFO);
brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_VI_FIFO);

/* zero the address match register so we do not send ACKs */
brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET,
null_ether_addr);
} else {
/* resume tx fifos */
if (!wlc_hw->wlc->tx_suspended) {
brcms_b_tx_fifo_resume(wlc_hw, TX_DATA_FIFO);
}
brcms_b_tx_fifo_resume(wlc_hw, TX_CTL_FIFO);
brcms_b_tx_fifo_resume(wlc_hw, TX_AC_BK_FIFO);
brcms_b_tx_fifo_resume(wlc_hw, TX_AC_VI_FIFO);

/* Restore address */
brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET,
wlc_hw->etheraddr);
}

wlc_phy_mute_upd(wlc_hw->band->pi, on, flags);

if (on)
brcms_c_ucode_mute_override_set(wlc_hw);
else
brcms_c_ucode_mute_override_clear(wlc_hw);
}

/* brcms_b_tx_fifo_suspended:
* Check the MAC's tx suspend status for a tx fifo.
*
* When the MAC acknowledges a tx suspend, it indicates that no more
* packets will be transmitted out the radio. This is independent of
* DMA channel suspension---the DMA may have finished suspending, or may still
* be pulling data into a tx fifo, by the time the MAC acks the suspend
* request.
*/
static bool brcms_b_tx_fifo_suspended(struct brcms_hardware *wlc_hw,
uint tx_fifo)
{
/* check that a suspend has been requested and is no longer pending */

/*
* for DMA mode, the suspend request is set in xmtcontrol of the DMA engine,
* and the tx fifo suspend at the lower end of the MAC is acknowledged in the
* chnstatus register.
* The tx fifo suspend completion is independent of the DMA suspend completion and
* may be acked before or after the DMA is suspended.
*/
if (dma_txsuspended(wlc_hw->di[tx_fifo]) &&
(R_REG(&wlc_hw->regs->chnstatus) &
(1 << tx_fifo)) == 0)
return true;

return false;
}

static void brcms_b_tx_fifo_resume(struct brcms_hardware *wlc_hw,
uint tx_fifo)
{
/* BMAC_NOTE: BRCMS_TX_FIFO_ENAB is done in brcms_c_dpc() for DMA case
* but need to be done here for PIO otherwise the watchdog will catch
* the inconsistency and fire
*/
/* Two clients of this code, 11h Quiet period and scanning. */
if (wlc_hw->di[tx_fifo])
dma_txresume(wlc_hw->di[tx_fifo]);

/* allow core to sleep again */
if (wlc_hw->suspended_fifos == 0)
return;
else {
wlc_hw->suspended_fifos &= ~(1 << tx_fifo);
if (wlc_hw->suspended_fifos == 0)
brcms_c_ucode_wake_override_clear(wlc_hw,
BRCMS_WAKE_OVERRIDE_TXFIFO);
}
}

/*
* Read and clear macintmask and macintstatus and intstatus registers.
* This routine should be called with interrupts off
* Return:
* -1 if DEVICEREMOVED(wlc) evaluates to true;
* 0 if the interrupt is not for us, or we are in some special cases;
* device interrupt status bits otherwise.
*/
static inline u32 wlc_intstatus(struct brcms_c_info *wlc, bool in_isr)
{
struct brcms_hardware *wlc_hw = wlc->hw;
struct d11regs *regs = wlc_hw->regs;
u32 macintstatus;

/* macintstatus includes a DMA interrupt summary bit */
macintstatus = R_REG(&regs->macintstatus);

BCMMSG(wlc->wiphy, "wl%d: macintstatus: 0x%x\n", wlc_hw->unit,
macintstatus);

/* detect cardbus removed, in power down(suspend) and in reset */
if (DEVICEREMOVED(wlc))
return -1;

/* DEVICEREMOVED succeeds even when the core is still resetting,
* handle that case here.
*/
if (macintstatus == 0xffffffff)
return 0;

/* defer unsolicited interrupts */
macintstatus &= (in_isr ? wlc->macintmask : wlc->defmacintmask);

/* if not for us */
if (macintstatus == 0)
return 0;

/* interrupts are already turned off for CFE build
* Caution: For CFE Turning off the interrupts again has some undesired
* consequences
*/
/* turn off the interrupts */
W_REG(&regs->macintmask, 0);
(void)R_REG(&regs->macintmask); /* sync readback */
wlc->macintmask = 0;

/* clear device interrupts */
W_REG(&regs->macintstatus, macintstatus);

/* MI_DMAINT is indication of non-zero intstatus */
if (macintstatus & MI_DMAINT) {
/*
* only fifo interrupt enabled is I_RI in
* RX_FIFO. If MI_DMAINT is set, assume it
* is set and clear the interrupt.
*/
W_REG(&regs->intctrlregs[RX_FIFO].intstatus,
DEF_RXINTMASK);
}

return macintstatus;
}

/* Update wlc->macintstatus and wlc->intstatus[]. */
/* Return true if they are updated successfully. false otherwise */
bool brcms_c_intrsupd(struct brcms_c_info *wlc)
{
u32 macintstatus;

/* read and clear macintstatus and intstatus registers */
macintstatus = wlc_intstatus(wlc, false);

/* device is removed */
if (macintstatus == 0xffffffff)
return false;

/* update interrupt status in software */
wlc->macintstatus |= macintstatus;

return true;
}

/*
* First-level interrupt processing.
* Return true if this was our interrupt, false otherwise.
* *wantdpc will be set to true if further brcms_c_dpc() processing is required,
* false otherwise.
*/
bool brcms_c_isr(struct brcms_c_info *wlc, bool *wantdpc)
{
struct brcms_hardware *wlc_hw = wlc->hw;
u32 macintstatus;

*wantdpc = false;

if (!wlc_hw->up || !wlc->macintmask)
return false;

/* read and clear macintstatus and intstatus registers */
macintstatus = wlc_intstatus(wlc, true);

if (macintstatus == 0xffffffff)
wiphy_err(wlc->wiphy, "DEVICEREMOVED detected in the ISR code"
" path\n");

/* it is not for us */
if (macintstatus == 0)
return false;

*wantdpc = true;

/* save interrupt status bits */
wlc->macintstatus = macintstatus;

return true;

}

void brcms_c_suspend_mac_and_wait(struct brcms_c_info *wlc)
{
struct brcms_hardware *wlc_hw = wlc->hw;
struct d11regs *regs = wlc_hw->regs;
u32 mc, mi;
struct wiphy *wiphy = wlc->wiphy;

BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit,
wlc_hw->band->bandunit);

/*
* Track overlapping suspend requests
*/
wlc_hw->mac_suspend_depth++;
if (wlc_hw->mac_suspend_depth > 1)
return;

/* force the core awake */
brcms_c_ucode_wake_override_set(wlc_hw, BRCMS_WAKE_OVERRIDE_MACSUSPEND);

mc = R_REG(&regs->maccontrol);

if (mc == 0xffffffff) {
wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit,
__func__);
brcms_down(wlc->wl);
return;
}
WARN_ON(mc & MCTL_PSM_JMP_0);
WARN_ON(!(mc & MCTL_PSM_RUN));
WARN_ON(!(mc & MCTL_EN_MAC));

mi = R_REG(&regs->macintstatus);
if (mi == 0xffffffff) {
wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit,
__func__);
brcms_down(wlc->wl);
return;
}
WARN_ON(mi & MI_MACSSPNDD);

brcms_b_mctrl(wlc_hw, MCTL_EN_MAC, 0);

SPINWAIT(!(R_REG(&regs->macintstatus) & MI_MACSSPNDD),
BRCMS_MAX_MAC_SUSPEND);

if (!(R_REG(&regs->macintstatus) & MI_MACSSPNDD)) {
wiphy_err(wiphy, "wl%d: wlc_suspend_mac_and_wait: waited %d uS"
" and MI_MACSSPNDD is still not on.\n",
wlc_hw->unit, BRCMS_MAX_MAC_SUSPEND);
wiphy_err(wiphy, "wl%d: psmdebug 0x%08x, phydebug 0x%08x, "
"psm_brc 0x%04x\n", wlc_hw->unit,
R_REG(&regs->psmdebug),
R_REG(&regs->phydebug),
R_REG(&regs->psm_brc));
}

mc = R_REG(&regs->maccontrol);
if (mc == 0xffffffff) {
wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit,
__func__);
brcms_down(wlc->wl);
return;
}
WARN_ON(mc & MCTL_PSM_JMP_0);
WARN_ON(!(mc & MCTL_PSM_RUN));
WARN_ON(mc & MCTL_EN_MAC);
}

void brcms_c_enable_mac(struct brcms_c_info *wlc)
{
struct brcms_hardware *wlc_hw = wlc->hw;
struct d11regs *regs = wlc_hw->regs;
u32 mc, mi;

BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit,
wlc->band->bandunit);

/*
* Track overlapping suspend requests
*/
wlc_hw->mac_suspend_depth--;
if (wlc_hw->mac_suspend_depth > 0)
return;

mc = R_REG(&regs->maccontrol);
WARN_ON(mc & MCTL_PSM_JMP_0);
WARN_ON(mc & MCTL_EN_MAC);
WARN_ON(!(mc & MCTL_PSM_RUN));

brcms_b_mctrl(wlc_hw, MCTL_EN_MAC, MCTL_EN_MAC);
W_REG(&regs->macintstatus, MI_MACSSPNDD);

mc = R_REG(&regs->maccontrol);
WARN_ON(mc & MCTL_PSM_JMP_0);
WARN_ON(!(mc & MCTL_EN_MAC));
WARN_ON(!(mc & MCTL_PSM_RUN));

mi = R_REG(&regs->macintstatus);
WARN_ON(mi & MI_MACSSPNDD);

brcms_c_ucode_wake_override_clear(wlc_hw,
BRCMS_WAKE_OVERRIDE_MACSUSPEND);
}

static void brcms_upd_ofdm_pctl1_table(struct brcms_hardware *wlc_hw)
{
u8 rate;
u8 rates[8] = {
BRCM_RATE_6M, BRCM_RATE_9M, BRCM_RATE_12M, BRCM_RATE_18M,
BRCM_RATE_24M, BRCM_RATE_36M, BRCM_RATE_48M, BRCM_RATE_54M
};
u16 entry_ptr;
u16 pctl1;
uint i;

if (!BRCMS_PHY_11N_CAP(wlc_hw->band))
return;

/* walk the phy rate table and update the entries */
for (i = 0; i < ARRAY_SIZE(rates); i++) {
rate = rates[i];

entry_ptr = brcms_b_ofdm_ratetable_offset(wlc_hw, rate);

/* read the SHM Rate Table entry OFDM PCTL1 values */
pctl1 =
brcms_b_read_shm(wlc_hw, entry_ptr + M_RT_OFDM_PCTL1_POS);

/* modify the value */
pctl1 &= ~PHY_TXC1_MODE_MASK;
pctl1 |= (wlc_hw->hw_stf_ss_opmode << PHY_TXC1_MODE_SHIFT);

/* Update the SHM Rate Table entry OFDM PCTL1 values */
brcms_b_write_shm(wlc_hw, entry_ptr + M_RT_OFDM_PCTL1_POS,
pctl1);
}
}

static u16 brcms_b_ofdm_ratetable_offset(struct brcms_hardware *wlc_hw,
u8 rate)
{
uint i;
u8 plcp_rate = 0;
struct plcp_signal_rate_lookup {
u8 rate;
u8 signal_rate;
};
/* OFDM RATE sub-field of PLCP SIGNAL field, per 802.11 sec 17.3.4.1 */
const struct plcp_signal_rate_lookup rate_lookup[] = {
{BRCM_RATE_6M, 0xB},
{BRCM_RATE_9M, 0xF},
{BRCM_RATE_12M, 0xA},
{BRCM_RATE_18M, 0xE},
{BRCM_RATE_24M, 0x9},
{BRCM_RATE_36M, 0xD},
{BRCM_RATE_48M, 0x8},
{BRCM_RATE_54M, 0xC}
};

for (i = 0; i < ARRAY_SIZE(rate_lookup); i++) {
if (rate == rate_lookup[i].rate) {
plcp_rate = rate_lookup[i].signal_rate;
break;
}
}

/* Find the SHM pointer to the rate table entry by looking in the
* Direct-map Table
*/
return 2 * brcms_b_read_shm(wlc_hw, M_RT_DIRMAP_A + (plcp_rate * 2));
}

void brcms_b_band_stf_ss_set(struct brcms_hardware *wlc_hw, u8 stf_mode)
{
wlc_hw->hw_stf_ss_opmode = stf_mode;

if (wlc_hw->clk)
brcms_upd_ofdm_pctl1_table(wlc_hw);
}

static bool brcms_b_validate_chip_access(struct brcms_hardware *wlc_hw)
{
struct d11regs *regs;
u32 w, val;
struct wiphy *wiphy = wlc_hw->wlc->wiphy;

BCMMSG(wiphy, "wl%d\n", wlc_hw->unit);

regs = wlc_hw->regs;

/* Validate dchip register access */

W_REG(&regs->objaddr, OBJADDR_SHM_SEL | 0);
(void)R_REG(&regs->objaddr);
w = R_REG(&regs->objdata);

/* Can we write and read back a 32bit register? */
W_REG(&regs->objaddr, OBJADDR_SHM_SEL | 0);
(void)R_REG(&regs->objaddr);
W_REG(&regs->objdata, (u32) 0xaa5555aa);

W_REG(&regs->objaddr, OBJADDR_SHM_SEL | 0);
(void)R_REG(&regs->objaddr);
val = R_REG(&regs->objdata);
if (val != (u32) 0xaa5555aa) {
wiphy_err(wiphy, "wl%d: validate_chip_access: SHM = 0x%x, "
"expected 0xaa5555aa\n", wlc_hw->unit, val);
return false;
}

W_REG(&regs->objaddr, OBJADDR_SHM_SEL | 0);
(void)R_REG(&regs->objaddr);
W_REG(&regs->objdata, (u32) 0x55aaaa55);

W_REG(&regs->objaddr, OBJADDR_SHM_SEL | 0);
(void)R_REG(&regs->objaddr);
val = R_REG(&regs->objdata);
if (val != (u32) 0x55aaaa55) {
wiphy_err(wiphy, "wl%d: validate_chip_access: SHM = 0x%x, "
"expected 0x55aaaa55\n", wlc_hw->unit, val);
return false;
}

W_REG(&regs->objaddr, OBJADDR_SHM_SEL | 0);
(void)R_REG(&regs->objaddr);
W_REG(&regs->objdata, w);

/* clear CFPStart */
W_REG(&regs->tsf_cfpstart, 0);

w = R_REG(&regs->maccontrol);
if ((w != (MCTL_IHR_EN | MCTL_WAKE)) &&
(w != (MCTL_IHR_EN | MCTL_GMODE | MCTL_WAKE))) {
wiphy_err(wiphy, "wl%d: validate_chip_access: maccontrol = "
"0x%x, expected 0x%x or 0x%x\n", wlc_hw->unit, w,
(MCTL_IHR_EN | MCTL_WAKE),
(MCTL_IHR_EN | MCTL_GMODE | MCTL_WAKE));
return false;
}

return true;
}

#define PHYPLL_WAIT_US 100000

void brcms_b_core_phypll_ctl(struct brcms_hardware *wlc_hw, bool on)
{
struct d11regs *regs;
u32 tmp;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

tmp = 0;
regs = wlc_hw->regs;

if (on) {
if ((wlc_hw->sih->chip == BCM4313_CHIP_ID)) {
OR_REG(&regs->clk_ctl_st,
(CCS_ERSRC_REQ_HT | CCS_ERSRC_REQ_D11PLL |
CCS_ERSRC_REQ_PHYPLL));
SPINWAIT((R_REG(&regs->clk_ctl_st) &
(CCS_ERSRC_AVAIL_HT)) != (CCS_ERSRC_AVAIL_HT),
PHYPLL_WAIT_US);

tmp = R_REG(&regs->clk_ctl_st);
if ((tmp & (CCS_ERSRC_AVAIL_HT)) !=
(CCS_ERSRC_AVAIL_HT)) {
wiphy_err(wlc_hw->wlc->wiphy, "%s: turn on PHY"
" PLL failed\n", __func__);
}
} else {
OR_REG(&regs->clk_ctl_st,
(CCS_ERSRC_REQ_D11PLL | CCS_ERSRC_REQ_PHYPLL));
SPINWAIT((R_REG(&regs->clk_ctl_st) &
(CCS_ERSRC_AVAIL_D11PLL |
CCS_ERSRC_AVAIL_PHYPLL)) !=
(CCS_ERSRC_AVAIL_D11PLL |
CCS_ERSRC_AVAIL_PHYPLL), PHYPLL_WAIT_US);

tmp = R_REG(&regs->clk_ctl_st);
if ((tmp &
(CCS_ERSRC_AVAIL_D11PLL | CCS_ERSRC_AVAIL_PHYPLL))
!=
(CCS_ERSRC_AVAIL_D11PLL | CCS_ERSRC_AVAIL_PHYPLL)) {
wiphy_err(wlc_hw->wlc->wiphy, "%s: turn on "
"PHY PLL failed\n", __func__);
}
}
} else {
/* Since the PLL may be shared, other cores can still be requesting it;
* so we'll deassert the request but not wait for status to comply.
*/
AND_REG(&regs->clk_ctl_st, ~CCS_ERSRC_REQ_PHYPLL);
tmp = R_REG(&regs->clk_ctl_st);
}
}

void brcms_c_coredisable(struct brcms_hardware *wlc_hw)
{
bool dev_gone;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

dev_gone = DEVICEREMOVED(wlc_hw->wlc);

if (dev_gone)
return;

if (wlc_hw->noreset)
return;

/* radio off */
wlc_phy_switch_radio(wlc_hw->band->pi, OFF);

/* turn off analog core */
wlc_phy_anacore(wlc_hw->band->pi, OFF);

/* turn off PHYPLL to save power */
brcms_b_core_phypll_ctl(wlc_hw, false);

/* No need to set wlc->pub->radio_active = OFF
* because this function needs down capability and
* radio_active is designed for BCMNODOWN.
*/

/* remove gpio controls */
if (wlc_hw->ucode_dbgsel)
ai_gpiocontrol(wlc_hw->sih, ~0, 0, GPIO_DRV_PRIORITY);

wlc_hw->clk = false;
ai_core_disable(wlc_hw->sih, 0);
wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false);
}

/* power both the pll and external oscillator on/off */
static void brcms_b_xtal(struct brcms_hardware *wlc_hw, bool want)
{
BCMMSG(wlc_hw->wlc->wiphy, "wl%d: want %d\n", wlc_hw->unit, want);

/* dont power down if plldown is false or we must poll hw radio disable */
if (!want && wlc_hw->pllreq)
return;

if (wlc_hw->sih)
ai_clkctl_xtal(wlc_hw->sih, XTAL | PLL, want);

wlc_hw->sbclk = want;
if (!wlc_hw->sbclk) {
wlc_hw->clk = false;
if (wlc_hw->band && wlc_hw->band->pi)
wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false);
}
}

static void brcms_c_flushqueues(struct brcms_c_info *wlc)
{
struct brcms_hardware *wlc_hw = wlc->hw;
uint i;

wlc->txpend16165war = 0;

/* free any posted tx packets */
for (i = 0; i < NFIFO; i++)
if (wlc_hw->di[i]) {
dma_txreclaim(wlc_hw->di[i], DMA_RANGE_ALL);
TXPKTPENDCLR(wlc, i);
BCMMSG(wlc->wiphy, "pktpend fifo %d clrd\n", i);
}

/* free any posted rx packets */
dma_rxreclaim(wlc_hw->di[RX_FIFO]);
}

u16 brcms_b_read_shm(struct brcms_hardware *wlc_hw, uint offset)
{
return brcms_b_read_objmem(wlc_hw, offset, OBJADDR_SHM_SEL);
}

void brcms_b_write_shm(struct brcms_hardware *wlc_hw, uint offset, u16 v)
{
brcms_b_write_objmem(wlc_hw, offset, v, OBJADDR_SHM_SEL);
}

static u16
brcms_b_read_objmem(struct brcms_hardware *wlc_hw, uint offset, u32 sel)
{
struct d11regs *regs = wlc_hw->regs;
volatile u16 *objdata_lo = (volatile u16 *)&regs->objdata;
volatile u16 *objdata_hi = objdata_lo + 1;
u16 v;

W_REG(&regs->objaddr, sel | (offset >> 2));
(void)R_REG(&regs->objaddr);
if (offset & 2) {
v = R_REG(objdata_hi);
} else {
v = R_REG(objdata_lo);
}

return v;
}

static void
brcms_b_write_objmem(struct brcms_hardware *wlc_hw, uint offset, u16 v,
u32 sel)
{
struct d11regs *regs = wlc_hw->regs;
volatile u16 *objdata_lo = (volatile u16 *)&regs->objdata;
volatile u16 *objdata_hi = objdata_lo + 1;

W_REG(&regs->objaddr, sel | (offset >> 2));
(void)R_REG(&regs->objaddr);
if (offset & 2) {
W_REG(objdata_hi, v);
} else {
W_REG(objdata_lo, v);
}
}

/* Copy a buffer to shared memory of specified type .
* SHM 'offset' needs to be an even address and
* Buffer length 'len' must be an even number of bytes
* 'sel' selects the type of memory
*/
void
brcms_b_copyto_objmem(struct brcms_hardware *wlc_hw, uint offset,
const void *buf, int len, u32 sel)
{
u16 v;
const u8 *p = (const u8 *)buf;
int i;

if (len <= 0 || (offset & 1) || (len & 1))
return;

for (i = 0; i < len; i += 2) {
v = p[i] | (p[i + 1] << 8);
brcms_b_write_objmem(wlc_hw, offset + i, v, sel);
}
}

/* Copy a piece of shared memory of specified type to a buffer .
* SHM 'offset' needs to be an even address and
* Buffer length 'len' must be an even number of bytes
* 'sel' selects the type of memory
*/
void
brcms_b_copyfrom_objmem(struct brcms_hardware *wlc_hw, uint offset, void *buf,
int len, u32 sel)
{
u16 v;
u8 *p = (u8 *) buf;
int i;

if (len <= 0 || (offset & 1) || (len & 1))
return;

for (i = 0; i < len; i += 2) {
v = brcms_b_read_objmem(wlc_hw, offset + i, sel);
p[i] = v & 0xFF;
p[i + 1] = (v >> 8) & 0xFF;
}
}

void brcms_b_copyfrom_vars(struct brcms_hardware *wlc_hw, char **buf,
uint *len)
{
BCMMSG(wlc_hw->wlc->wiphy, "nvram vars totlen=%d\n",
wlc_hw->vars_size);

*buf = wlc_hw->vars;
*len = wlc_hw->vars_size;
}

void brcms_b_retrylimit_upd(struct brcms_hardware *wlc_hw, u16 SRL, u16 LRL)
{
wlc_hw->SRL = SRL;
wlc_hw->LRL = LRL;

/* write retry limit to SCR, shouldn't need to suspend */
if (wlc_hw->up) {
W_REG(&wlc_hw->regs->objaddr,
OBJADDR_SCR_SEL | S_DOT11_SRC_LMT);
(void)R_REG(&wlc_hw->regs->objaddr);
W_REG(&wlc_hw->regs->objdata, wlc_hw->SRL);
W_REG(&wlc_hw->regs->objaddr,
OBJADDR_SCR_SEL | S_DOT11_LRC_LMT);
(void)R_REG(&wlc_hw->regs->objaddr);
W_REG(&wlc_hw->regs->objdata, wlc_hw->LRL);
}
}

void brcms_b_pllreq(struct brcms_hardware *wlc_hw, bool set, u32 req_bit)
{
if (set) {
if (mboolisset(wlc_hw->pllreq, req_bit))
return;

mboolset(wlc_hw->pllreq, req_bit);

if (mboolisset(wlc_hw->pllreq, BRCMS_PLLREQ_FLIP)) {
if (!wlc_hw->sbclk) {
brcms_b_xtal(wlc_hw, ON);
}
}
} else {
if (!mboolisset(wlc_hw->pllreq, req_bit))
return;

mboolclr(wlc_hw->pllreq, req_bit);

if (mboolisset(wlc_hw->pllreq, BRCMS_PLLREQ_FLIP)) {
if (wlc_hw->sbclk) {
brcms_b_xtal(wlc_hw, OFF);
}
}
}

return;
}

void brcms_b_antsel_set(struct brcms_hardware *wlc_hw, u32 antsel_avail)
{
wlc_hw->antsel_avail = antsel_avail;
}

/* conditions under which the PM bit should be set in outgoing frames and STAY_AWAKE is meaningful
*/
bool brcms_c_ps_allowed(struct brcms_c_info *wlc)
{
int idx;
struct brcms_bss_cfg *cfg;

/* disallow PS when one of the following global conditions meets */
if (!wlc->pub->associated)
return false;

/* disallow PS when one of these meets when not scanning */
if (AP_ACTIVE(wlc) || wlc->monitor)
return false;

for (idx = 0; idx < BRCMS_MAXBSSCFG; idx++) {
cfg = wlc->bsscfg[idx];
if (cfg && BSSCFG_STA(cfg) && cfg->associated) {
/*
* disallow PS when one of the following
* bsscfg specific conditions meets
*/
if (!cfg->BSS || !BRCMS_PORTOPEN(cfg))
return false;

if (!cfg->dtim_programmed)
return false;
}
}

return true;
}

void brcms_b_reset(struct brcms_hardware *wlc_hw)
{
BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

/* reset the core */
if (!DEVICEREMOVED(wlc_hw->wlc))
brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS);

/* purge the dma rings */
brcms_c_flushqueues(wlc_hw->wlc);

brcms_c_reset_bmac_done(wlc_hw->wlc);
}

void brcms_c_reset(struct brcms_c_info *wlc)
{
BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

/* slurp up hw mac counters before core reset */
brcms_c_statsupd(wlc);

/* reset our snapshot of macstat counters */
memset((char *)wlc->core->macstat_snapshot, 0,
sizeof(struct macstat));

brcms_b_reset(wlc->hw);
}

void brcms_c_fatal_error(struct brcms_c_info *wlc)
{
wiphy_err(wlc->wiphy, "wl%d: fatal error, reinitializing\n",
wlc->pub->unit);
brcms_init(wlc->wl);
}

/* Return the channel the driver should initialize during brcms_c_init.
* the channel may have to be changed from the currently configured channel
* if other configurations are in conflict (bandlocked, 11n mode disabled,
* invalid channel for current country, etc.)
*/
static u16 brcms_c_init_chanspec(struct brcms_c_info *wlc)
{
u16 chanspec =
1 | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE |
WL_CHANSPEC_BAND_2G;

return chanspec;
}

struct scb global_scb;

static void brcms_c_init_scb(struct brcms_c_info *wlc, struct scb *scb)
{
int i;
scb->flags = SCB_WMECAP | SCB_HTCAP;
for (i = 0; i < NUMPRIO; i++)
scb->seqnum[i] = 0;
}

/* d11 core init
* reset PSM
* download ucode/PCM
* let ucode run to suspended
* download ucode inits
* config other core registers
* init dma
*/
static void brcms_b_coreinit(struct brcms_c_info *wlc)
{
struct brcms_hardware *wlc_hw = wlc->hw;
struct d11regs *regs;
u32 sflags;
uint bcnint_us;
uint i = 0;
bool fifosz_fixup = false;
int err = 0;
u16 buf[NFIFO];
struct wiphy *wiphy = wlc->wiphy;

regs = wlc_hw->regs;

BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit);

/* reset PSM */
brcms_b_mctrl(wlc_hw, ~0, (MCTL_IHR_EN | MCTL_PSM_JMP_0 | MCTL_WAKE));

brcms_ucode_download(wlc_hw);
/*
* FIFOSZ fixup. driver wants to controls the fifo allocation.
*/
fifosz_fixup = true;

/* let the PSM run to the suspended state, set mode to BSS STA */
W_REG(&regs->macintstatus, -1);
brcms_b_mctrl(wlc_hw, ~0,
(MCTL_IHR_EN | MCTL_INFRA | MCTL_PSM_RUN | MCTL_WAKE));

/* wait for ucode to self-suspend after auto-init */
SPINWAIT(((R_REG(&regs->macintstatus) & MI_MACSSPNDD) == 0),
1000 * 1000);
if ((R_REG(&regs->macintstatus) & MI_MACSSPNDD) == 0)
wiphy_err(wiphy, "wl%d: wlc_coreinit: ucode did not self-"
"suspend!\n", wlc_hw->unit);

brcms_c_gpio_init(wlc);

sflags = ai_core_sflags(wlc_hw->sih, 0, 0);

if (D11REV_IS(wlc_hw->corerev, 23)) {
if (BRCMS_ISNPHY(wlc_hw->band))
brcms_c_write_inits(wlc_hw, d11n0initvals16);
else
wiphy_err(wiphy, "%s: wl%d: unsupported phy in corerev"
" %d\n", __func__, wlc_hw->unit,
wlc_hw->corerev);
} else if (D11REV_IS(wlc_hw->corerev, 24)) {
if (BRCMS_ISLCNPHY(wlc_hw->band)) {
brcms_c_write_inits(wlc_hw, d11lcn0initvals24);
} else {
wiphy_err(wiphy, "%s: wl%d: unsupported phy in corerev"
" %d\n", __func__, wlc_hw->unit,
wlc_hw->corerev);
}
} else {
wiphy_err(wiphy, "%s: wl%d: unsupported corerev %d\n",
__func__, wlc_hw->unit, wlc_hw->corerev);
}

/* For old ucode, txfifo sizes needs to be modified(increased) */
if (fifosz_fixup == true) {
brcms_b_corerev_fifofixup(wlc_hw);
}

/* check txfifo allocations match between ucode and driver */
buf[TX_AC_BE_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE0);
if (buf[TX_AC_BE_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_BE_FIFO]) {
i = TX_AC_BE_FIFO;
err = -1;
}
buf[TX_AC_VI_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE1);
if (buf[TX_AC_VI_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_VI_FIFO]) {
i = TX_AC_VI_FIFO;
err = -1;
}
buf[TX_AC_BK_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE2);
buf[TX_AC_VO_FIFO] = (buf[TX_AC_BK_FIFO] >> 8) & 0xff;
buf[TX_AC_BK_FIFO] &= 0xff;
if (buf[TX_AC_BK_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_BK_FIFO]) {
i = TX_AC_BK_FIFO;
err = -1;
}
if (buf[TX_AC_VO_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_VO_FIFO]) {
i = TX_AC_VO_FIFO;
err = -1;
}
buf[TX_BCMC_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE3);
buf[TX_ATIM_FIFO] = (buf[TX_BCMC_FIFO] >> 8) & 0xff;
buf[TX_BCMC_FIFO] &= 0xff;
if (buf[TX_BCMC_FIFO] != wlc_hw->xmtfifo_sz[TX_BCMC_FIFO]) {
i = TX_BCMC_FIFO;
err = -1;
}
if (buf[TX_ATIM_FIFO] != wlc_hw->xmtfifo_sz[TX_ATIM_FIFO]) {
i = TX_ATIM_FIFO;
err = -1;
}
if (err != 0) {
wiphy_err(wiphy, "wlc_coreinit: txfifo mismatch: ucode size %d"
" driver size %d index %d\n", buf[i],
wlc_hw->xmtfifo_sz[i], i);
}

/* make sure we can still talk to the mac */
WARN_ON(R_REG(&regs->maccontrol) == 0xffffffff);

/* band-specific inits done by wlc_bsinit() */

/* Set up frame burst size and antenna swap threshold init values */
brcms_b_write_shm(wlc_hw, M_MBURST_SIZE, MAXTXFRAMEBURST);
brcms_b_write_shm(wlc_hw, M_MAX_ANTCNT, ANTCNT);

/* enable one rx interrupt per received frame */
W_REG(&regs->intrcvlazy[0], (1 << IRL_FC_SHIFT));

/* set the station mode (BSS STA) */
brcms_b_mctrl(wlc_hw,
(MCTL_INFRA | MCTL_DISCARD_PMQ | MCTL_AP),
(MCTL_INFRA | MCTL_DISCARD_PMQ));

/* set up Beacon interval */
bcnint_us = 0x8000 << 10;
W_REG(&regs->tsf_cfprep, (bcnint_us << CFPREP_CBI_SHIFT));
W_REG(&regs->tsf_cfpstart, bcnint_us);
W_REG(&regs->macintstatus, MI_GP1);

/* write interrupt mask */
W_REG(&regs->intctrlregs[RX_FIFO].intmask, DEF_RXINTMASK);

/* allow the MAC to control the PHY clock (dynamic on/off) */
brcms_b_macphyclk_set(wlc_hw, ON);

/* program dynamic clock control fast powerup delay register */
wlc->fastpwrup_dly = ai_clkctl_fast_pwrup_delay(wlc_hw->sih);
W_REG(&regs->scc_fastpwrup_dly, wlc->fastpwrup_dly);

/* tell the ucode the corerev */
brcms_b_write_shm(wlc_hw, M_MACHW_VER, (u16) wlc_hw->corerev);

/* tell the ucode MAC capabilities */
brcms_b_write_shm(wlc_hw, M_MACHW_CAP_L,
(u16) (wlc_hw->machwcap & 0xffff));
brcms_b_write_shm(wlc_hw, M_MACHW_CAP_H,
(u16) ((wlc_hw->
machwcap >> 16) & 0xffff));

/* write retry limits to SCR, this done after PSM init */
W_REG(&regs->objaddr, OBJADDR_SCR_SEL | S_DOT11_SRC_LMT);
(void)R_REG(&regs->objaddr);
W_REG(&regs->objdata, wlc_hw->SRL);
W_REG(&regs->objaddr, OBJADDR_SCR_SEL | S_DOT11_LRC_LMT);
(void)R_REG(&regs->objaddr);
W_REG(&regs->objdata, wlc_hw->LRL);

/* write rate fallback retry limits */
brcms_b_write_shm(wlc_hw, M_SFRMTXCNTFBRTHSD, wlc_hw->SFBL);
brcms_b_write_shm(wlc_hw, M_LFRMTXCNTFBRTHSD, wlc_hw->LFBL);

AND_REG(&regs->ifs_ctl, 0x0FFF);
W_REG(&regs->ifs_aifsn, EDCF_AIFSN_MIN);

/* dma initializations */
wlc->txpend16165war = 0;

/* init the tx dma engines */
for (i = 0; i < NFIFO; i++) {
if (wlc_hw->di[i])
dma_txinit(wlc_hw->di[i]);
}

/* init the rx dma engine(s) and post receive buffers */
dma_rxinit(wlc_hw->di[RX_FIFO]);
dma_rxfill(wlc_hw->di[RX_FIFO]);
}

void
brcms_b_init(struct brcms_hardware *wlc_hw, u16 chanspec,
bool mute) {
u32 macintmask;
bool fastclk;
struct brcms_c_info *wlc = wlc_hw->wlc;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

/* request FAST clock if not on */
fastclk = wlc_hw->forcefastclk;
if (!fastclk)
brcms_b_clkctl_clk(wlc_hw, CLK_FAST);

/* disable interrupts */
macintmask = brcms_intrsoff(wlc->wl);

/* set up the specified band and chanspec */
brcms_c_setxband(wlc_hw, CHSPEC_BANDUNIT(chanspec));
wlc_phy_chanspec_radio_set(wlc_hw->band->pi, chanspec);

/* do one-time phy inits and calibration */
wlc_phy_cal_init(wlc_hw->band->pi);

/* core-specific initialization */
brcms_b_coreinit(wlc);

/* suspend the tx fifos and mute the phy for preism cac time */
if (mute)
brcms_b_mute(wlc_hw, ON, PHY_MUTE_FOR_PREISM);

/* band-specific inits */
brcms_b_bsinit(wlc, chanspec);

/* restore macintmask */
brcms_intrsrestore(wlc->wl, macintmask);

/* seed wake_override with BRCMS_WAKE_OVERRIDE_MACSUSPEND since the mac
* is suspended and brcms_c_enable_mac() will clear this override bit.
*/
mboolset(wlc_hw->wake_override, BRCMS_WAKE_OVERRIDE_MACSUSPEND);

/*
* initialize mac_suspend_depth to 1 to match ucode initial suspended state
*/
wlc_hw->mac_suspend_depth = 1;

/* restore the clk */
if (!fastclk)
brcms_b_clkctl_clk(wlc_hw, CLK_DYNAMIC);
}

void brcms_c_init(struct brcms_c_info *wlc)
{
struct d11regs *regs;
u16 chanspec;
int i;
struct brcms_bss_cfg *bsscfg;
bool mute = false;

BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

regs = wlc->regs;

/* This will happen if a big-hammer was executed. In that case, we want to go back
* to the channel that we were on and not new channel
*/
if (wlc->pub->associated)
chanspec = wlc->home_chanspec;
else
chanspec = brcms_c_init_chanspec(wlc);

brcms_b_init(wlc->hw, chanspec, mute);

/* update beacon listen interval */
brcms_c_bcn_li_upd(wlc);

/* the world is new again, so is our reported rate */
brcms_c_reprate_init(wlc);

/* write ethernet address to core */
FOREACH_BSS(wlc, i, bsscfg)
brcms_c_set_mac(bsscfg);
brcms_c_set_bssid(bsscfg);
END_FOREACH_BSS

/* Update tsf_cfprep if associated and up */
if (wlc->pub->associated) {
FOREACH_BSS(wlc, i, bsscfg)
if (bsscfg->up) {
u32 bi;

/* get beacon period and convert to uS */
bi = bsscfg->current_bss->beacon_period << 10;
/*
* update since init path would reset
* to default value
*/
W_REG(&regs->tsf_cfprep,
(bi << CFPREP_CBI_SHIFT));

/* Update maccontrol PM related bits */
brcms_c_set_ps_ctrl(wlc);

break;
}
END_FOREACH_BSS
}

brcms_c_bandinit_ordered(wlc, chanspec);

brcms_c_init_scb(wlc, &global_scb);

/* init probe response timeout */
brcms_c_write_shm(wlc, M_PRS_MAXTIME, wlc->prb_resp_timeout);

/* init max burst txop (framebursting) */
brcms_c_write_shm(wlc, M_MBURST_TXOP,
(wlc->
_rifs ? (EDCF_AC_VO_TXOP_AP << 5) : MAXFRAMEBURST_TXOP));

/* initialize maximum allowed duty cycle */
brcms_c_duty_cycle_set(wlc, wlc->tx_duty_cycle_ofdm, true, true);
brcms_c_duty_cycle_set(wlc, wlc->tx_duty_cycle_cck, false, true);

/* Update some shared memory locations related to max AMPDU size allowed to received */
brcms_c_ampdu_shm_upd(wlc->ampdu);

/* band-specific inits */
brcms_c_bsinit(wlc);

/* Enable EDCF mode (while the MAC is suspended) */
if (EDCF_ENAB(wlc->pub)) {
OR_REG(&regs->ifs_ctl, IFS_USEEDCF);
brcms_c_edcf_setparams(wlc, false);
}

/* Init precedence maps for empty FIFOs */
brcms_c_tx_prec_map_init(wlc);

/* read the ucode version if we have not yet done so */
if (wlc->ucode_rev == 0) {
wlc->ucode_rev =
brcms_c_read_shm(wlc, M_BOM_REV_MAJOR) << NBITS(u16);
wlc->ucode_rev |= brcms_c_read_shm(wlc, M_BOM_REV_MINOR);
}

/* ..now really unleash hell (allow the MAC out of suspend) */
brcms_c_enable_mac(wlc);

/* clear tx flow control */
brcms_c_txflowcontrol_reset(wlc);

/* clear tx data fifo suspends */
wlc->tx_suspended = false;

/* enable the RF Disable Delay timer */
W_REG(&wlc->regs->rfdisabledly, RFDISABLE_DEFAULT);

/* initialize mpc delay */
wlc->mpc_delay_off = wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT;

/*
* Initialize WME parameters; if they haven't been set by some other
* mechanism (IOVar, etc) then read them from the hardware.
*/
if (BRCMS_WME_RETRY_SHORT_GET(wlc, 0) == 0) {
/* Uninitialized; read from HW */
int ac;

for (ac = 0; ac < AC_COUNT; ac++) {
wlc->wme_retries[ac] =
brcms_c_read_shm(wlc, M_AC_TXLMT_ADDR(ac));
}
}
}

void brcms_c_mac_bcn_promisc_change(struct brcms_c_info *wlc, bool promisc)
{
wlc->bcnmisc_monitor = promisc;
brcms_c_mac_bcn_promisc(wlc);
}

void brcms_c_mac_bcn_promisc(struct brcms_c_info *wlc)
{
if ((AP_ENAB(wlc->pub) && (N_ENAB(wlc->pub) || wlc->band->gmode)) ||
wlc->bcnmisc_ibss || wlc->bcnmisc_scan || wlc->bcnmisc_monitor)
brcms_c_mctrl(wlc, MCTL_BCNS_PROMISC, MCTL_BCNS_PROMISC);
else
brcms_c_mctrl(wlc, MCTL_BCNS_PROMISC, 0);
}

/* set or clear maccontrol bits MCTL_PROMISC and MCTL_KEEPCONTROL */
void brcms_c_mac_promisc(struct brcms_c_info *wlc)
{
u32 promisc_bits = 0;

/* promiscuous mode just sets MCTL_PROMISC
* Note: APs get all BSS traffic without the need to set the MCTL_PROMISC bit
* since all BSS data traffic is directed at the AP
*/
if (PROMISC_ENAB(wlc->pub) && !AP_ENAB(wlc->pub))
promisc_bits |= MCTL_PROMISC;

/* monitor mode needs both MCTL_PROMISC and MCTL_KEEPCONTROL
* Note: monitor mode also needs MCTL_BCNS_PROMISC, but that is
* handled in brcms_c_mac_bcn_promisc()
*/
if (MONITOR_ENAB(wlc))
promisc_bits |= MCTL_PROMISC | MCTL_KEEPCONTROL;

brcms_c_mctrl(wlc, MCTL_PROMISC | MCTL_KEEPCONTROL, promisc_bits);
}

/* push sw hps and wake state through hardware */
void brcms_c_set_ps_ctrl(struct brcms_c_info *wlc)
{
u32 v1, v2;
bool hps;
bool awake_before;

hps = PS_ALLOWED(wlc);

BCMMSG(wlc->wiphy, "wl%d: hps %d\n", wlc->pub->unit, hps);

v1 = R_REG(&wlc->regs->maccontrol);
v2 = MCTL_WAKE;
if (hps)
v2 |= MCTL_HPS;

brcms_c_mctrl(wlc, MCTL_WAKE | MCTL_HPS, v2);

awake_before = ((v1 & MCTL_WAKE) || ((v1 & MCTL_HPS) == 0));

if (!awake_before)
brcms_b_wait_for_wake(wlc->hw);

}

/*
* Write this BSS config's MAC address to core.
* Updates RXE match engine.
*/
int brcms_c_set_mac(struct brcms_bss_cfg *cfg)
{
int err = 0;
struct brcms_c_info *wlc = cfg->wlc;

if (cfg == wlc->cfg) {
/* enter the MAC addr into the RXE match registers */
brcms_c_set_addrmatch(wlc, RCM_MAC_OFFSET, cfg->cur_etheraddr);
}

brcms_c_ampdu_macaddr_upd(wlc);

return err;
}

/* Write the BSS config's BSSID address to core (set_bssid in d11procs.tcl).
* Updates RXE match engine.
*/
void brcms_c_set_bssid(struct brcms_bss_cfg *cfg)
{
struct brcms_c_info *wlc = cfg->wlc;

/* if primary config, we need to update BSSID in RXE match registers */
if (cfg == wlc->cfg) {
brcms_c_set_addrmatch(wlc, RCM_BSSID_OFFSET, cfg->BSSID);
}
#ifdef SUPPORT_HWKEYS
else if (BSSCFG_STA(cfg) && cfg->BSS) {
brcms_c_rcmta_add_bssid(wlc, cfg);
}
#endif
}

void brcms_b_set_shortslot(struct brcms_hardware *wlc_hw, bool shortslot)
{
wlc_hw->shortslot = shortslot;

if (BAND_2G(brcms_b_bandtype(wlc_hw)) && wlc_hw->up) {
brcms_c_suspend_mac_and_wait(wlc_hw->wlc);
brcms_b_update_slot_timing(wlc_hw, shortslot);
brcms_c_enable_mac(wlc_hw->wlc);
}
}

/*
* Suspend the the MAC and update the slot timing
* for standard 11b/g (20us slots) or shortslot 11g (9us slots).
*/
void brcms_c_switch_shortslot(struct brcms_c_info *wlc, bool shortslot)
{
int idx;
struct brcms_bss_cfg *cfg;

/* use the override if it is set */
if (wlc->shortslot_override != BRCMS_SHORTSLOT_AUTO)
shortslot = (wlc->shortslot_override == BRCMS_SHORTSLOT_ON);

if (wlc->shortslot == shortslot)
return;

wlc->shortslot = shortslot;

/* update the capability based on current shortslot mode */
FOREACH_BSS(wlc, idx, cfg)
if (!cfg->associated)
continue;
cfg->current_bss->capability &=
~WLAN_CAPABILITY_SHORT_SLOT_TIME;
if (wlc->shortslot)
cfg->current_bss->capability |=
WLAN_CAPABILITY_SHORT_SLOT_TIME;
END_FOREACH_BSS

brcms_b_set_shortslot(wlc->hw, shortslot);
}

static u8 brcms_c_local_constraint_qdbm(struct brcms_c_info *wlc)
{
u8 local;
s16 local_max;

local = BRCMS_TXPWR_MAX;
if (wlc->pub->associated &&
(brcmu_chspec_ctlchan(wlc->chanspec) ==
brcmu_chspec_ctlchan(wlc->home_chanspec))) {

/* get the local power constraint if we are on the AP's
* channel [802.11h, 7.3.2.13]
*/
/* Clamp the value between 0 and BRCMS_TXPWR_MAX w/o
* overflowing the target */
local_max =
(wlc->txpwr_local_max -
wlc->txpwr_local_constraint) * BRCMS_TXPWR_DB_FACTOR;
if (local_max > 0 && local_max < BRCMS_TXPWR_MAX)
return (u8) local_max;
if (local_max < 0)
return 0;
}

return local;
}

/* propagate home chanspec to all bsscfgs in case bsscfg->current_bss->chanspec is referenced */
void brcms_c_set_home_chanspec(struct brcms_c_info *wlc, u16 chanspec)
{
if (wlc->home_chanspec != chanspec) {
int idx;
struct brcms_bss_cfg *cfg;

wlc->home_chanspec = chanspec;

FOREACH_BSS(wlc, idx, cfg)
if (!cfg->associated)
continue;

cfg->current_bss->chanspec = chanspec;
END_FOREACH_BSS

}
}

static void brcms_c_set_phy_chanspec(struct brcms_c_info *wlc,
u16 chanspec)
{
/* Save our copy of the chanspec */
wlc->chanspec = chanspec;

/* Set the chanspec and power limits for this locale after computing
* any 11h local tx power constraints.
*/
brcms_c_channel_set_chanspec(wlc->cmi, chanspec,
brcms_c_local_constraint_qdbm(wlc));

if (wlc->stf->ss_algosel_auto)
brcms_c_stf_ss_algo_channel_get(wlc, &wlc->stf->ss_algo_channel,
chanspec);

brcms_c_stf_ss_update(wlc, wlc->band);

}

void
brcms_b_set_chanspec(struct brcms_hardware *wlc_hw, u16 chanspec,
bool mute, struct txpwr_limits *txpwr)
{
uint bandunit;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d: 0x%x\n", wlc_hw->unit, chanspec);

wlc_hw->chanspec = chanspec;

/* Switch bands if necessary */
if (NBANDS_HW(wlc_hw) > 1) {
bandunit = CHSPEC_BANDUNIT(chanspec);
if (wlc_hw->band->bandunit != bandunit) {
/* brcms_b_setband disables other bandunit,
* use light band switch if not up yet
*/
if (wlc_hw->up) {
wlc_phy_chanspec_radio_set(wlc_hw->
bandstate[bandunit]->
pi, chanspec);
brcms_b_setband(wlc_hw, bandunit, chanspec);
} else {
brcms_c_setxband(wlc_hw, bandunit);
}
}
}

wlc_phy_initcal_enable(wlc_hw->band->pi, !mute);

if (!wlc_hw->up) {
if (wlc_hw->clk)
wlc_phy_txpower_limit_set(wlc_hw->band->pi, txpwr,
chanspec);
wlc_phy_chanspec_radio_set(wlc_hw->band->pi, chanspec);
} else {
wlc_phy_chanspec_set(wlc_hw->band->pi, chanspec);
wlc_phy_txpower_limit_set(wlc_hw->band->pi, txpwr, chanspec);

/* Update muting of the channel */
brcms_b_mute(wlc_hw, mute, 0);
}
}

void brcms_c_set_chanspec(struct brcms_c_info *wlc, u16 chanspec)
{
uint bandunit;
bool switchband = false;
u16 old_chanspec = wlc->chanspec;

if (!brcms_c_valid_chanspec_db(wlc->cmi, chanspec)) {
wiphy_err(wlc->wiphy, "wl%d: %s: Bad channel %d\n",
wlc->pub->unit, __func__, CHSPEC_CHANNEL(chanspec));
return;
}

/* Switch bands if necessary */
if (NBANDS(wlc) > 1) {
bandunit = CHSPEC_BANDUNIT(chanspec);
if (wlc->band->bandunit != bandunit || wlc->bandinit_pending) {
switchband = true;
if (wlc->bandlocked) {
wiphy_err(wlc->wiphy, "wl%d: %s: chspec %d "
"band is locked!\n",
wlc->pub->unit, __func__,
CHSPEC_CHANNEL(chanspec));
return;
}
/*
* should the setband call come after the
* brcms_b_chanspec() ? if the setband updates
* (brcms_c_bsinit) use low level calls to inspect and
* set state, the state inspected may be from the wrong
* band, or the following brcms_b_set_chanspec() may
* undo the work.
*/
brcms_c_setband(wlc, bandunit);
}
}

/* sync up phy/radio chanspec */
brcms_c_set_phy_chanspec(wlc, chanspec);

/* init antenna selection */
if (CHSPEC_WLC_BW(old_chanspec) != CHSPEC_WLC_BW(chanspec)) {
brcms_c_antsel_init(wlc->asi);

/* Fix the hardware rateset based on bw.
* Mainly add MCS32 for 40Mhz, remove MCS 32 for 20Mhz
*/
brcms_c_rateset_bw_mcs_filter(&wlc->band->hw_rateset,
wlc->band->
mimo_cap_40 ? CHSPEC_WLC_BW(chanspec)
: 0);
}

/* update some mac configuration since chanspec changed */
brcms_c_ucode_mac_upd(wlc);
}

u32 brcms_c_lowest_basic_rspec(struct brcms_c_info *wlc,
struct brcms_c_rateset *rs)
{
u32 lowest_basic_rspec;
uint i;

/* Use the lowest basic rate */
lowest_basic_rspec = rs->rates[0] & BRCMS_RATE_MASK;
for (i = 0; i < rs->count; i++) {
if (rs->rates[i] & BRCMS_RATE_FLAG) {
lowest_basic_rspec = rs->rates[i] & BRCMS_RATE_MASK;
break;
}
}
#if NCONF
/* pick siso/cdd as default for OFDM (note no basic rate MCSs are supported yet) */
if (IS_OFDM(lowest_basic_rspec)) {
lowest_basic_rspec |= (wlc->stf->ss_opmode << RSPEC_STF_SHIFT);
}
#endif

return lowest_basic_rspec;
}

/* This function changes the phytxctl for beacon based on current beacon ratespec AND txant
* setting as per this table:
* ratespec CCK ant = wlc->stf->txant
* OFDM ant = 3
*/
void brcms_c_beacon_phytxctl_txant_upd(struct brcms_c_info *wlc,
u32 bcn_rspec)
{
u16 phyctl;
u16 phytxant = wlc->stf->phytxant;
u16 mask = PHY_TXC_ANT_MASK;

/* for non-siso rates or default setting, use the available chains */
if (BRCMS_PHY_11N_CAP(wlc->band))
phytxant = brcms_c_stf_phytxchain_sel(wlc, bcn_rspec);

phyctl = brcms_c_read_shm(wlc, M_BCN_PCTLWD);
phyctl = (phyctl & ~mask) | phytxant;
brcms_c_write_shm(wlc, M_BCN_PCTLWD, phyctl);
}

/* centralized protection config change function to simplify debugging, no consistency checking
* this should be called only on changes to avoid overhead in periodic function
*/
void brcms_c_protection_upd(struct brcms_c_info *wlc, uint idx, int val)
{
BCMMSG(wlc->wiphy, "idx %d, val %d\n", idx, val);

switch (idx) {
case BRCMS_PROT_G_SPEC:
wlc->protection->_g = (bool) val;
break;
case BRCMS_PROT_G_OVR:
wlc->protection->g_override = (s8) val;
break;
case BRCMS_PROT_G_USER:
wlc->protection->gmode_user = (u8) val;
break;
case BRCMS_PROT_OVERLAP:
wlc->protection->overlap = (s8) val;
break;
case BRCMS_PROT_N_USER:
wlc->protection->nmode_user = (s8) val;
break;
case BRCMS_PROT_N_CFG:
wlc->protection->n_cfg = (s8) val;
break;
case BRCMS_PROT_N_CFG_OVR:
wlc->protection->n_cfg_override = (s8) val;
break;
case BRCMS_PROT_N_NONGF:
wlc->protection->nongf = (bool) val;
break;
case BRCMS_PROT_N_NONGF_OVR:
wlc->protection->nongf_override = (s8) val;
break;
case BRCMS_PROT_N_PAM_OVR:
wlc->protection->n_pam_override = (s8) val;
break;
case BRCMS_PROT_N_OBSS:
wlc->protection->n_obss = (bool) val;
break;

default:
break;
}

}

static void brcms_c_ht_update_sgi_rx(struct brcms_c_info *wlc, int val)
{
wlc->ht_cap.cap_info &= ~(IEEE80211_HT_CAP_SGI_20 |
IEEE80211_HT_CAP_SGI_40);
wlc->ht_cap.cap_info |= (val & BRCMS_N_SGI_20) ?
IEEE80211_HT_CAP_SGI_20 : 0;
wlc->ht_cap.cap_info |= (val & BRCMS_N_SGI_40) ?
IEEE80211_HT_CAP_SGI_40 : 0;

if (wlc->pub->up) {
brcms_c_update_beacon(wlc);
brcms_c_update_probe_resp(wlc, true);
}
}

static void brcms_c_ht_update_ldpc(struct brcms_c_info *wlc, s8 val)
{
wlc->stf->ldpc = val;

wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_LDPC_CODING;
if (wlc->stf->ldpc != OFF)
wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_LDPC_CODING;

if (wlc->pub->up) {
brcms_c_update_beacon(wlc);
brcms_c_update_probe_resp(wlc, true);
wlc_phy_ldpc_override_set(wlc->band->pi, (val ? true : false));
}
}

/*
* ucode, hwmac update
* Channel dependent updates for ucode and hw
*/
static void brcms_c_ucode_mac_upd(struct brcms_c_info *wlc)
{
/* enable or disable any active IBSSs depending on whether or not
* we are on the home channel
*/
if (wlc->home_chanspec == BRCMS_BAND_PI_RADIO_CHANSPEC) {
if (wlc->pub->associated) {
/* BMAC_NOTE: This is something that should be fixed in ucode inits.
* I think that the ucode inits set up the bcn templates and shm values
* with a bogus beacon. This should not be done in the inits. If ucode needs
* to set up a beacon for testing, the test routines should write it down,
* not expect the inits to populate a bogus beacon.
*/
if (BRCMS_PHY_11N_CAP(wlc->band)) {
brcms_c_write_shm(wlc, M_BCN_TXTSF_OFFSET,
wlc->band->bcntsfoff);
}
}
} else {
/* disable an active IBSS if we are not on the home channel */
}

/* update the various promisc bits */
brcms_c_mac_bcn_promisc(wlc);
brcms_c_mac_promisc(wlc);
}

static void brcms_c_bandinit_ordered(struct brcms_c_info *wlc,
u16 chanspec)
{
struct brcms_c_rateset default_rateset;
uint parkband;
uint i, band_order[2];

BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);
/*
* We might have been bandlocked during down and the chip power-cycled (hibernate).
* figure out the right band to park on
*/
if (wlc->bandlocked || NBANDS(wlc) == 1) {
/* updated in brcms_c_bandlock() */
parkband = wlc->band->bandunit;
band_order[0] = band_order[1] = parkband;
} else {
/* park on the band of the specified chanspec */
parkband = CHSPEC_BANDUNIT(chanspec);

/* order so that parkband initialize last */
band_order[0] = parkband ^ 1;
band_order[1] = parkband;
}

/* make each band operational, software state init */
for (i = 0; i < NBANDS(wlc); i++) {
uint j = band_order[i];

wlc->band = wlc->bandstate[j];

brcms_default_rateset(wlc, &default_rateset);

/* fill in hw_rate */
brcms_c_rateset_filter(&default_rateset, &wlc->band->hw_rateset,
false, BRCMS_RATES_CCK_OFDM, BRCMS_RATE_MASK,
(bool) N_ENAB(wlc->pub));

/* init basic rate lookup */
brcms_c_rate_lookup_init(wlc, &default_rateset);
}

/* sync up phy/radio chanspec */
brcms_c_set_phy_chanspec(wlc, chanspec);
}

/* band-specific init */
static void brcms_c_bsinit(struct brcms_c_info *wlc)
{
BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n",
wlc->pub->unit, wlc->band->bandunit);

/* write ucode ACK/CTS rate table */
brcms_c_set_ratetable(wlc);

/* update some band specific mac configuration */
brcms_c_ucode_mac_upd(wlc);

/* init antenna selection */
brcms_c_antsel_init(wlc->asi);

}

/* switch to and initialize new band */
static void brcms_c_setband(struct brcms_c_info *wlc,
uint bandunit)
{
int idx;
struct brcms_bss_cfg *cfg;

wlc->band = wlc->bandstate[bandunit];

if (!wlc->pub->up)
return;

/* wait for at least one beacon before entering sleeping state */
for (idx = 0; idx < BRCMS_MAXBSSCFG; idx++) {
cfg = wlc->bsscfg[idx];
if (cfg && BSSCFG_STA(cfg) && cfg->associated)
cfg->PMawakebcn = true;
}
brcms_c_set_ps_ctrl(wlc);

/* band-specific initializations */
brcms_c_bsinit(wlc);
}

/* Initialize a WME Parameter Info Element with default STA parameters from WMM Spec, Table 12 */
void
brcms_c_wme_initparams_sta(struct brcms_c_info *wlc, struct wme_param_ie *pe)
{
static const struct wme_param_ie stadef = {
WME_OUI,
WME_TYPE,
WME_SUBTYPE_PARAM_IE,
WME_VER,
0,
0,
{
{EDCF_AC_BE_ACI_STA, EDCF_AC_BE_ECW_STA,
cpu_to_le16(EDCF_AC_BE_TXOP_STA)},
{EDCF_AC_BK_ACI_STA, EDCF_AC_BK_ECW_STA,
cpu_to_le16(EDCF_AC_BK_TXOP_STA)},
{EDCF_AC_VI_ACI_STA, EDCF_AC_VI_ECW_STA,
cpu_to_le16(EDCF_AC_VI_TXOP_STA)},
{EDCF_AC_VO_ACI_STA, EDCF_AC_VO_ECW_STA,
cpu_to_le16(EDCF_AC_VO_TXOP_STA)}
}
};
memcpy(pe, &stadef, sizeof(*pe));
}

void brcms_c_wme_setparams(struct brcms_c_info *wlc, u16 aci,
const struct ieee80211_tx_queue_params *params,
bool suspend)
{
int i;
struct shm_acparams acp_shm;
u16 *shm_entry;

/* Only apply params if the core is out of reset and has clocks */
if (!wlc->clk) {
wiphy_err(wlc->wiphy, "wl%d: %s : no-clock\n", wlc->pub->unit,
__func__);
return;
}

do {
memset((char *)&acp_shm, 0, sizeof(struct shm_acparams));
/* fill in shm ac params struct */
acp_shm.txop = le16_to_cpu(params->txop);
/* convert from units of 32us to us for ucode */
wlc->edcf_txop[aci & 0x3] = acp_shm.txop =
EDCF_TXOP2USEC(acp_shm.txop);
acp_shm.aifs = (params->aifs & EDCF_AIFSN_MASK);

if (aci == AC_VI && acp_shm.txop == 0
&& acp_shm.aifs < EDCF_AIFSN_MAX)
acp_shm.aifs++;

if (acp_shm.aifs < EDCF_AIFSN_MIN
|| acp_shm.aifs > EDCF_AIFSN_MAX) {
wiphy_err(wlc->wiphy, "wl%d: edcf_setparams: bad "
"aifs %d\n", wlc->pub->unit, acp_shm.aifs);
continue;
}

acp_shm.cwmin = params->cw_min;
acp_shm.cwmax = params->cw_max;
acp_shm.cwcur = acp_shm.cwmin;
acp_shm.bslots =
R_REG(&wlc->regs->tsf_random) & acp_shm.cwcur;
acp_shm.reggap = acp_shm.bslots + acp_shm.aifs;
/* Indicate the new params to the ucode */
acp_shm.status = brcms_c_read_shm(wlc, (M_EDCF_QINFO +
wme_shmemacindex(aci) *
M_EDCF_QLEN +
M_EDCF_STATUS_OFF));
acp_shm.status |= WME_STATUS_NEWAC;

/* Fill in shm acparam table */
shm_entry = (u16 *) &acp_shm;
for (i = 0; i < (int)sizeof(struct shm_acparams); i += 2)
brcms_c_write_shm(wlc,
M_EDCF_QINFO +
wme_shmemacindex(aci) * M_EDCF_QLEN + i,
*shm_entry++);

} while (0);

if (suspend)
brcms_c_suspend_mac_and_wait(wlc);

if (suspend)
brcms_c_enable_mac(wlc);

}

void brcms_c_edcf_setparams(struct brcms_c_info *wlc, bool suspend)
{
u16 aci;
int i_ac;
struct edcf_acparam *edcf_acp;

struct ieee80211_tx_queue_params txq_pars;
struct ieee80211_tx_queue_params *params = &txq_pars;

/*
* AP uses AC params from wme_param_ie_ap.
* AP advertises AC params from wme_param_ie.
* STA uses AC params from wme_param_ie.
*/

edcf_acp = (struct edcf_acparam *) &wlc->wme_param_ie.acparam[0];

for (i_ac = 0; i_ac < AC_COUNT; i_ac++, edcf_acp++) {
/* find out which ac this set of params applies to */
aci = (edcf_acp->ACI & EDCF_ACI_MASK) >> EDCF_ACI_SHIFT;

/* fill in shm ac params struct */
params->txop = edcf_acp->TXOP;
params->aifs = edcf_acp->ACI;

/* CWmin = 2^(ECWmin) - 1 */
params->cw_min = EDCF_ECW2CW(edcf_acp->ECW & EDCF_ECWMIN_MASK);
/* CWmax = 2^(ECWmax) - 1 */
params->cw_max = EDCF_ECW2CW((edcf_acp->ECW & EDCF_ECWMAX_MASK)
>> EDCF_ECWMAX_SHIFT);
brcms_c_wme_setparams(wlc, aci, params, suspend);
}

if (suspend)
brcms_c_suspend_mac_and_wait(wlc);

if (AP_ENAB(wlc->pub) && WME_ENAB(wlc->pub)) {
brcms_c_update_beacon(wlc);
brcms_c_update_probe_resp(wlc, false);
}

if (suspend)
brcms_c_enable_mac(wlc);

}

bool brcms_c_timers_init(struct brcms_c_info *wlc, int unit)
{
wlc->wdtimer = brcms_init_timer(wlc->wl, brcms_c_watchdog_by_timer,
wlc, "watchdog");
if (!wlc->wdtimer) {
wiphy_err(wlc->wiphy, "wl%d: wl_init_timer for wdtimer "
"failed\n", unit);
goto fail;
}

wlc->radio_timer = brcms_init_timer(wlc->wl, brcms_c_radio_timer,
wlc, "radio");
if (!wlc->radio_timer) {
wiphy_err(wlc->wiphy, "wl%d: wl_init_timer for radio_timer "
"failed\n", unit);
goto fail;
}

return true;

fail:
return false;
}

/*
* Initialize brcms_c_info default values ...
* may get overrides later in this function
*/
void brcms_c_info_init(struct brcms_c_info *wlc, int unit)
{
int i;
/* Assume the device is there until proven otherwise */
wlc->device_present = true;

/* Save our copy of the chanspec */
wlc->chanspec = CH20MHZ_CHSPEC(1);

/* various 802.11g modes */
wlc->shortslot = false;
wlc->shortslot_override = BRCMS_SHORTSLOT_AUTO;

brcms_c_protection_upd(wlc, BRCMS_PROT_G_OVR, BRCMS_PROTECTION_AUTO);
brcms_c_protection_upd(wlc, BRCMS_PROT_G_SPEC, false);

brcms_c_protection_upd(wlc, BRCMS_PROT_N_CFG_OVR,
BRCMS_PROTECTION_AUTO);
brcms_c_protection_upd(wlc, BRCMS_PROT_N_CFG, BRCMS_N_PROTECTION_OFF);
brcms_c_protection_upd(wlc, BRCMS_PROT_N_NONGF_OVR,
BRCMS_PROTECTION_AUTO);
brcms_c_protection_upd(wlc, BRCMS_PROT_N_NONGF, false);
brcms_c_protection_upd(wlc, BRCMS_PROT_N_PAM_OVR, AUTO);

brcms_c_protection_upd(wlc, BRCMS_PROT_OVERLAP,
BRCMS_PROTECTION_CTL_OVERLAP);

/* 802.11g draft 4.0 NonERP elt advertisement */
wlc->include_legacy_erp = true;

wlc->stf->ant_rx_ovr = ANT_RX_DIV_DEF;
wlc->stf->txant = ANT_TX_DEF;

wlc->prb_resp_timeout = BRCMS_PRB_RESP_TIMEOUT;

wlc->usr_fragthresh = DOT11_DEFAULT_FRAG_LEN;
for (i = 0; i < NFIFO; i++)
wlc->fragthresh[i] = DOT11_DEFAULT_FRAG_LEN;
wlc->RTSThresh = DOT11_DEFAULT_RTS_LEN;

/* default rate fallback retry limits */
wlc->SFBL = RETRY_SHORT_FB;
wlc->LFBL = RETRY_LONG_FB;

/* default mac retry limits */
wlc->SRL = RETRY_SHORT_DEF;
wlc->LRL = RETRY_LONG_DEF;

/* Set flag to indicate that hw keys should be used when available. */
wlc->wsec_swkeys = false;

/* init the 4 static WEP default keys */
for (i = 0; i < WSEC_MAX_DEFAULT_KEYS; i++) {
wlc->wsec_keys[i] = wlc->wsec_def_keys[i];
wlc->wsec_keys[i]->idx = (u8) i;
}

/* WME QoS mode is Auto by default */
wlc->pub->_wme = AUTO;

#ifdef BCMSDIODEV_ENABLED
wlc->pub->_priofc = true; /* enable priority flow control for sdio dongle */
#endif

wlc->pub->_ampdu = AMPDU_AGG_HOST;
wlc->pub->bcmerror = 0;
wlc->pub->_coex = ON;

/* initialize mpc delay */
wlc->mpc_delay_off = wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT;
}

static bool brcms_c_state_bmac_sync(struct brcms_c_info *wlc)
{
struct brcms_b_state state_bmac = {0};

if (brcms_b_state_get(wlc->hw, &state_bmac) != 0)
return false;

wlc->machwcap = state_bmac.machwcap;
brcms_c_protection_upd(wlc, BRCMS_PROT_N_PAM_OVR,
(s8) state_bmac.preamble_ovr);

return true;
}

static uint brcms_c_attach_module(struct brcms_c_info *wlc)
{
uint err = 0;
uint unit;
unit = wlc->pub->unit;

wlc->asi = brcms_c_antsel_attach(wlc);
if (wlc->asi == NULL) {
wiphy_err(wlc->wiphy, "wl%d: attach: antsel_attach "
"failed\n", unit);
err = 44;
goto fail;
}

wlc->ampdu = brcms_c_ampdu_attach(wlc);
if (wlc->ampdu == NULL) {
wiphy_err(wlc->wiphy, "wl%d: attach: ampdu_attach "
"failed\n", unit);
err = 50;
goto fail;
}

if ((brcms_c_stf_attach(wlc) != 0)) {
wiphy_err(wlc->wiphy, "wl%d: attach: stf_attach "
"failed\n", unit);
err = 68;
goto fail;
}
fail:
return err;
}

struct brcms_pub *brcms_c_pub(void *wlc)
{
return ((struct brcms_c_info *) wlc)->pub;
}

#define CHIP_SUPPORTS_11N(wlc) 1

/* low level attach
* run backplane attach, init nvram
* run phy attach
* initialize software state for each core and band
* put the whole chip in reset(driver down state), no clock
*/
int brcms_b_attach(struct brcms_c_info *wlc, u16 vendor, u16 device, uint unit,
bool piomode, void *regsva, uint bustype, void *btparam)
{
struct brcms_hardware *wlc_hw;
struct d11regs *regs;
char *macaddr = NULL;
char *vars;
uint err = 0;
uint j;
bool wme = false;
struct shared_phy_params sha_params;
struct wiphy *wiphy = wlc->wiphy;

BCMMSG(wlc->wiphy, "wl%d: vendor 0x%x device 0x%x\n", unit, vendor,
device);

wme = true;

wlc_hw = wlc->hw;
wlc_hw->wlc = wlc;
wlc_hw->unit = unit;
wlc_hw->band = wlc_hw->bandstate[0];
wlc_hw->_piomode = piomode;

/* populate struct brcms_hardware with default values */
brcms_b_info_init(wlc_hw);

/*
* Do the hardware portion of the attach.
* Also initialize software state that depends on the particular hardware
* we are running.
*/
wlc_hw->sih = ai_attach(regsva, bustype, btparam,
&wlc_hw->vars, &wlc_hw->vars_size);
if (wlc_hw->sih == NULL) {
wiphy_err(wiphy, "wl%d: brcms_b_attach: si_attach failed\n",
unit);
err = 11;
goto fail;
}
vars = wlc_hw->vars;

/*
* Get vendid/devid nvram overwrites, which could be different
* than those the BIOS recognizes for devices on PCMCIA_BUS,
* SDIO_BUS, and SROMless devices on PCI_BUS.
*/
#ifdef BCMBUSTYPE
bustype = BCMBUSTYPE;
#endif
if (bustype != SI_BUS) {
char *var;

var = getvar(vars, "vendid");
if (var) {
vendor = (u16) simple_strtoul(var, NULL, 0);
wiphy_err(wiphy, "Overriding vendor id = 0x%x\n",
vendor);
}
var = getvar(vars, "devid");
if (var) {
u16 devid = (u16) simple_strtoul(var, NULL, 0);
if (devid != 0xffff) {
device = devid;
wiphy_err(wiphy, "Overriding device id = 0x%x"
"\n", device);
}
}

/* verify again the device is supported */
if (!brcms_c_chipmatch(vendor, device)) {
wiphy_err(wiphy, "wl%d: brcms_b_attach: Unsupported "
"vendor/device (0x%x/0x%x)\n",
unit, vendor, device);
err = 12;
goto fail;
}
}

wlc_hw->vendorid = vendor;
wlc_hw->deviceid = device;

/* set bar0 window to point at D11 core */
wlc_hw->regs = (struct d11regs *) ai_setcore(wlc_hw->sih, D11_CORE_ID,
0);
wlc_hw->corerev = ai_corerev(wlc_hw->sih);

regs = wlc_hw->regs;

wlc->regs = wlc_hw->regs;

/* validate chip, chiprev and corerev */
if (!brcms_c_isgoodchip(wlc_hw)) {
err = 13;
goto fail;
}

/* initialize power control registers */
ai_clkctl_init(wlc_hw->sih);

/* request fastclock and force fastclock for the rest of attach
* bring the d11 core out of reset.
* For PMU chips, the first wlc_clkctl_clk is no-op since core-clk is still false;
* But it will be called again inside wlc_corereset, after d11 is out of reset.
*/
brcms_b_clkctl_clk(wlc_hw, CLK_FAST);
brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS);

if (!brcms_b_validate_chip_access(wlc_hw)) {
wiphy_err(wiphy, "wl%d: brcms_b_attach: validate_chip_access "
"failed\n", unit);
err = 14;
goto fail;
}

/* get the board rev, used just below */
j = getintvar(vars, "boardrev");
/* promote srom boardrev of 0xFF to 1 */
if (j == BOARDREV_PROMOTABLE)
j = BOARDREV_PROMOTED;
wlc_hw->boardrev = (u16) j;
if (!brcms_c_validboardtype(wlc_hw)) {
wiphy_err(wiphy, "wl%d: brcms_b_attach: Unsupported Broadcom "
"board type (0x%x)" " or revision level (0x%x)\n",
unit, wlc_hw->sih->boardtype, wlc_hw->boardrev);
err = 15;
goto fail;
}
wlc_hw->sromrev = (u8) getintvar(vars, "sromrev");
wlc_hw->boardflags = (u32) getintvar(vars, "boardflags");
wlc_hw->boardflags2 = (u32) getintvar(vars, "boardflags2");

if (wlc_hw->boardflags & BFL_NOPLLDOWN)
brcms_b_pllreq(wlc_hw, true, BRCMS_PLLREQ_SHARED);

if ((wlc_hw->sih->bustype == PCI_BUS)
&& (ai_pci_war16165(wlc_hw->sih)))
wlc->war16165 = true;

/* check device id(srom, nvram etc.) to set bands */
if (wlc_hw->deviceid == BCM43224_D11N_ID ||
wlc_hw->deviceid == BCM43224_D11N_ID_VEN1) {
/* Dualband boards */
wlc_hw->_nbands = 2;
} else
wlc_hw->_nbands = 1;

if ((wlc_hw->sih->chip == BCM43225_CHIP_ID))
wlc_hw->_nbands = 1;

/* BMAC_NOTE: remove init of pub values when brcms_c_attach()
* unconditionally does the init of these values
*/
wlc->vendorid = wlc_hw->vendorid;
wlc->deviceid = wlc_hw->deviceid;
wlc->pub->sih = wlc_hw->sih;
wlc->pub->corerev = wlc_hw->corerev;
wlc->pub->sromrev = wlc_hw->sromrev;
wlc->pub->boardrev = wlc_hw->boardrev;
wlc->pub->boardflags = wlc_hw->boardflags;
wlc->pub->boardflags2 = wlc_hw->boardflags2;
wlc->pub->_nbands = wlc_hw->_nbands;

wlc_hw->physhim = wlc_phy_shim_attach(wlc_hw, wlc->wl, wlc);

if (wlc_hw->physhim == NULL) {
wiphy_err(wiphy, "wl%d: brcms_b_attach: wlc_phy_shim_attach "
"failed\n", unit);
err = 25;
goto fail;
}

/* pass all the parameters to wlc_phy_shared_attach in one struct */
sha_params.sih = wlc_hw->sih;
sha_params.physhim = wlc_hw->physhim;
sha_params.unit = unit;
sha_params.corerev = wlc_hw->corerev;
sha_params.vars = vars;
sha_params.vid = wlc_hw->vendorid;
sha_params.did = wlc_hw->deviceid;
sha_params.chip = wlc_hw->sih->chip;
sha_params.chiprev = wlc_hw->sih->chiprev;
sha_params.chippkg = wlc_hw->sih->chippkg;
sha_params.sromrev = wlc_hw->sromrev;
sha_params.boardtype = wlc_hw->sih->boardtype;
sha_params.boardrev = wlc_hw->boardrev;
sha_params.boardvendor = wlc_hw->sih->boardvendor;
sha_params.boardflags = wlc_hw->boardflags;
sha_params.boardflags2 = wlc_hw->boardflags2;
sha_params.bustype = wlc_hw->sih->bustype;
sha_params.buscorerev = wlc_hw->sih->buscorerev;

/* alloc and save pointer to shared phy state area */
wlc_hw->phy_sh = wlc_phy_shared_attach(&sha_params);
if (!wlc_hw->phy_sh) {
err = 16;
goto fail;
}

/* initialize software state for each core and band */
for (j = 0; j < NBANDS_HW(wlc_hw); j++) {
/*
* band0 is always 2.4Ghz
* band1, if present, is 5Ghz
*/

/* So if this is a single band 11a card, use band 1 */
if (IS_SINGLEBAND_5G(wlc_hw->deviceid))
j = BAND_5G_INDEX;

brcms_c_setxband(wlc_hw, j);

wlc_hw->band->bandunit = j;
wlc_hw->band->bandtype = j ? BRCM_BAND_5G : BRCM_BAND_2G;
wlc->band->bandunit = j;
wlc->band->bandtype = j ? BRCM_BAND_5G : BRCM_BAND_2G;
wlc->core->coreidx = ai_coreidx(wlc_hw->sih);

wlc_hw->machwcap = R_REG(&regs->machwcap);
wlc_hw->machwcap_backup = wlc_hw->machwcap;

/* init tx fifo size */
wlc_hw->xmtfifo_sz =
xmtfifo_sz[(wlc_hw->corerev - XMTFIFOTBL_STARTREV)];

/* Get a phy for this band */
wlc_hw->band->pi = wlc_phy_attach(wlc_hw->phy_sh,
(void *)regs, brcms_b_bandtype(wlc_hw), vars,
wlc->wiphy);
if (wlc_hw->band->pi == NULL) {
wiphy_err(wiphy, "wl%d: brcms_b_attach: wlc_phy_"
"attach failed\n", unit);
err = 17;
goto fail;
}

wlc_phy_machwcap_set(wlc_hw->band->pi, wlc_hw->machwcap);

wlc_phy_get_phyversion(wlc_hw->band->pi, &wlc_hw->band->phytype,
&wlc_hw->band->phyrev,
&wlc_hw->band->radioid,
&wlc_hw->band->radiorev);
wlc_hw->band->abgphy_encore =
wlc_phy_get_encore(wlc_hw->band->pi);
wlc->band->abgphy_encore = wlc_phy_get_encore(wlc_hw->band->pi);
wlc_hw->band->core_flags =
wlc_phy_get_coreflags(wlc_hw->band->pi);

/* verify good phy_type & supported phy revision */
if (BRCMS_ISNPHY(wlc_hw->band)) {
if (NCONF_HAS(wlc_hw->band->phyrev))
goto good_phy;
else
goto bad_phy;
} else if (BRCMS_ISLCNPHY(wlc_hw->band)) {
if (LCNCONF_HAS(wlc_hw->band->phyrev))
goto good_phy;
else
goto bad_phy;
} else {
bad_phy:
wiphy_err(wiphy, "wl%d: brcms_b_attach: unsupported "
"phy type/rev (%d/%d)\n", unit,
wlc_hw->band->phytype, wlc_hw->band->phyrev);
err = 18;
goto fail;
}

good_phy:
/* BMAC_NOTE: wlc->band->pi should not be set below and should be done in the
* high level attach. However we can not make that change until all low level access
* is changed to wlc_hw->band->pi. Instead do the wlc->band->pi init below, keeping
* wlc_hw->band->pi as well for incremental update of low level fns, and cut over
* low only init when all fns updated.
*/
wlc->band->pi = wlc_hw->band->pi;
wlc->band->phytype = wlc_hw->band->phytype;
wlc->band->phyrev = wlc_hw->band->phyrev;
wlc->band->radioid = wlc_hw->band->radioid;
wlc->band->radiorev = wlc_hw->band->radiorev;

/* default contention windows size limits */
wlc_hw->band->CWmin = APHY_CWMIN;
wlc_hw->band->CWmax = PHY_CWMAX;

if (!brcms_b_attach_dmapio(wlc, j, wme)) {
err = 19;
goto fail;
}
}

/* disable core to match driver "down" state */
brcms_c_coredisable(wlc_hw);

/* Match driver "down" state */
if (wlc_hw->sih->bustype == PCI_BUS)
ai_pci_down(wlc_hw->sih);

/* register sb interrupt callback functions */
ai_register_intr_callback(wlc_hw->sih, (void *)brcms_c_wlintrsoff,
(void *)brcms_c_wlintrsrestore, NULL, wlc);

/* turn off pll and xtal to match driver "down" state */
brcms_b_xtal(wlc_hw, OFF);

/* *********************************************************************
* The hardware is in the DOWN state at this point. D11 core
* or cores are in reset with clocks off, and the board PLLs
* are off if possible.
*
* Beyond this point, wlc->sbclk == false and chip registers
* should not be touched.
*********************************************************************
*/

/* init etheraddr state variables */
macaddr = brcms_c_get_macaddr(wlc_hw);
if (macaddr == NULL) {
wiphy_err(wiphy, "wl%d: brcms_b_attach: macaddr not found\n",
unit);
err = 21;
goto fail;
}
brcmu_ether_atoe(macaddr, wlc_hw->etheraddr);
if (is_broadcast_ether_addr(wlc_hw->etheraddr) ||
is_zero_ether_addr(wlc_hw->etheraddr)) {
wiphy_err(wiphy, "wl%d: brcms_b_attach: bad macaddr %s\n",
unit, macaddr);
err = 22;
goto fail;
}

BCMMSG(wlc->wiphy,
"deviceid 0x%x nbands %d board 0x%x macaddr: %s\n",
wlc_hw->deviceid, wlc_hw->_nbands,
wlc_hw->sih->boardtype, macaddr);

return err;

fail:
wiphy_err(wiphy, "wl%d: brcms_b_attach: failed with err %d\n", unit,
err);
return err;
}

/*
* The common driver entry routine. Error codes should be unique
*/
void *brcms_c_attach(struct brcms_info *wl, u16 vendor, u16 device, uint unit,
bool piomode, void *regsva, uint bustype, void *btparam,
uint *perr)
{
struct brcms_c_info *wlc;
uint err = 0;
uint j;
struct brcms_pub *pub;
uint n_disabled;

/* allocate struct brcms_c_info state and its substructures */
wlc = (struct brcms_c_info *) brcms_c_attach_malloc(unit, &err, device);
if (wlc == NULL)
goto fail;
wlc->wiphy = wl->wiphy;
pub = wlc->pub;

#if defined(BCMDBG)
wlc_info_dbg = wlc;
#endif

wlc->band = wlc->bandstate[0];
wlc->core = wlc->corestate;
wlc->wl = wl;
pub->unit = unit;
pub->_piomode = piomode;
wlc->bandinit_pending = false;

/* populate struct brcms_c_info with default values */
brcms_c_info_init(wlc, unit);

/* update sta/ap related parameters */
brcms_c_ap_upd(wlc);

/* 11n_disable nvram */
n_disabled = getintvar(pub->vars, "11n_disable");

/*
* low level attach steps(all hw accesses go
* inside, no more in rest of the attach)
*/
err = brcms_b_attach(wlc, vendor, device, unit, piomode, regsva,
bustype, btparam);
if (err)
goto fail;

/* for some states, due to different info pointer(e,g, wlc, wlc_hw) or master/slave split,
* HIGH driver(both monolithic and HIGH_ONLY) needs to sync states FROM BMAC portion driver
*/
if (!brcms_c_state_bmac_sync(wlc)) {
err = 20;
goto fail;
}

pub->phy_11ncapable = BRCMS_PHY_11N_CAP(wlc->band);

/* propagate *vars* from BMAC driver to high driver */
brcms_b_copyfrom_vars(wlc->hw, &pub->vars, &wlc->vars_size);

/* set maximum allowed duty cycle */
wlc->tx_duty_cycle_ofdm =
(u16) getintvar(pub->vars, "tx_duty_cycle_ofdm");
wlc->tx_duty_cycle_cck =
(u16) getintvar(pub->vars, "tx_duty_cycle_cck");

brcms_c_stf_phy_chain_calc(wlc);

/* txchain 1: txant 0, txchain 2: txant 1 */
if (BRCMS_ISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
wlc->stf->txant = wlc->stf->hw_txchain - 1;

/* push to BMAC driver */
wlc_phy_stf_chain_init(wlc->band->pi, wlc->stf->hw_txchain,
wlc->stf->hw_rxchain);

/* pull up some info resulting from the low attach */
{
int i;
for (i = 0; i < NFIFO; i++)
wlc->core->txavail[i] = wlc->hw->txavail[i];
}

brcms_b_hw_etheraddr(wlc->hw, wlc->perm_etheraddr);

memcpy(&pub->cur_etheraddr, &wlc->perm_etheraddr, ETH_ALEN);

for (j = 0; j < NBANDS(wlc); j++) {
/* Use band 1 for single band 11a */
if (IS_SINGLEBAND_5G(wlc->deviceid))
j = BAND_5G_INDEX;

wlc->band = wlc->bandstate[j];

if (!brcms_c_attach_stf_ant_init(wlc)) {
err = 24;
goto fail;
}

/* default contention windows size limits */
wlc->band->CWmin = APHY_CWMIN;
wlc->band->CWmax = PHY_CWMAX;

/* init gmode value */
if (BAND_2G(wlc->band->bandtype)) {
wlc->band->gmode = GMODE_AUTO;
brcms_c_protection_upd(wlc, BRCMS_PROT_G_USER,
wlc->band->gmode);
}

/* init _n_enab supported mode */
if (BRCMS_PHY_11N_CAP(wlc->band) && CHIP_SUPPORTS_11N(wlc)) {
if (n_disabled & WLFEATURE_DISABLE_11N) {
pub->_n_enab = OFF;
brcms_c_protection_upd(wlc, BRCMS_PROT_N_USER,
OFF);
} else {
pub->_n_enab = SUPPORT_11N;
brcms_c_protection_upd(wlc, BRCMS_PROT_N_USER,
((pub->_n_enab ==
SUPPORT_11N) ? WL_11N_2x2 :
WL_11N_3x3));
}
}

/* init per-band default rateset, depend on band->gmode */
brcms_default_rateset(wlc, &wlc->band->defrateset);

/* fill in hw_rateset (used early by BRCM_SET_RATESET) */
brcms_c_rateset_filter(&wlc->band->defrateset,
&wlc->band->hw_rateset, false,
BRCMS_RATES_CCK_OFDM, BRCMS_RATE_MASK,
(bool) N_ENAB(wlc->pub));
}

/* update antenna config due to wlc->stf->txant/txchain/ant_rx_ovr change */
brcms_c_stf_phy_txant_upd(wlc);

/* attach each modules */
err = brcms_c_attach_module(wlc);
if (err != 0)
goto fail;

if (!brcms_c_timers_init(wlc, unit)) {
wiphy_err(wl->wiphy, "wl%d: %s: init_timer failed\n", unit,
__func__);
err = 32;
goto fail;
}

/* depend on rateset, gmode */
wlc->cmi = brcms_c_channel_mgr_attach(wlc);
if (!wlc->cmi) {
wiphy_err(wl->wiphy, "wl%d: %s: channel_mgr_attach failed"
"\n", unit, __func__);
err = 33;
goto fail;
}

/* init default when all parameters are ready, i.e. ->rateset */
brcms_c_bss_default_init(wlc);

/*
* Complete the wlc default state initializations..
*/

/* allocate our initial queue */
wlc->pkt_queue = brcms_c_txq_alloc(wlc);
if (wlc->pkt_queue == NULL) {
wiphy_err(wl->wiphy, "wl%d: %s: failed to malloc tx queue\n",
unit, __func__);
err = 100;
goto fail;
}

wlc->bsscfg[0] = wlc->cfg;
wlc->cfg->_idx = 0;
wlc->cfg->wlc = wlc;
pub->txmaxpkts = MAXTXPKTS;

brcms_c_wme_initparams_sta(wlc, &wlc->wme_param_ie);

wlc->mimoft = FT_HT;
wlc->ht_cap.cap_info = HT_CAP;
if (HT_ENAB(wlc->pub))
wlc->stf->ldpc = AUTO;

wlc->mimo_40txbw = AUTO;
wlc->ofdm_40txbw = AUTO;
wlc->cck_40txbw = AUTO;
brcms_c_update_mimo_band_bwcap(wlc, BRCMS_N_BW_20IN2G_40IN5G);

/* Set default values of SGI */
if (BRCMS_SGI_CAP_PHY(wlc)) {
brcms_c_ht_update_sgi_rx(wlc, (BRCMS_N_SGI_20 |
BRCMS_N_SGI_40));
wlc->sgi_tx = AUTO;
} else if (BRCMS_ISSSLPNPHY(wlc->band)) {
brcms_c_ht_update_sgi_rx(wlc, (BRCMS_N_SGI_20 |
BRCMS_N_SGI_40));
wlc->sgi_tx = AUTO;
} else {
brcms_c_ht_update_sgi_rx(wlc, 0);
wlc->sgi_tx = OFF;
}

/* *******nvram 11n config overrides Start ********* */

/* apply the sgi override from nvram conf */
if (n_disabled & WLFEATURE_DISABLE_11N_SGI_TX)
wlc->sgi_tx = OFF;

if (n_disabled & WLFEATURE_DISABLE_11N_SGI_RX)
brcms_c_ht_update_sgi_rx(wlc, 0);

/* apply the stbc override from nvram conf */
if (n_disabled & WLFEATURE_DISABLE_11N_STBC_TX) {
wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
}
if (n_disabled & WLFEATURE_DISABLE_11N_STBC_RX)
brcms_c_stf_stbc_rx_set(wlc, HT_CAP_RX_STBC_NO);

/* apply the GF override from nvram conf */
if (n_disabled & WLFEATURE_DISABLE_11N_GF)
wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_GRN_FLD;

/* initialize radio_mpc_disable according to wlc->mpc */
brcms_c_radio_mpc_upd(wlc);
brcms_b_antsel_set(wlc->hw, wlc->asi->antsel_avail);

if (perr)
*perr = 0;

return (void *)wlc;

fail:
wiphy_err(wl->wiphy, "wl%d: %s: failed with err %d\n",
unit, __func__, err);
if (wlc)
brcms_c_detach(wlc);

if (perr)
*perr = err;
return NULL;
}

static void brcms_c_attach_antgain_init(struct brcms_c_info *wlc)
{
uint unit;
unit = wlc->pub->unit;

if ((wlc->band->antgain == -1) && (wlc->pub->sromrev == 1)) {
/* default antenna gain for srom rev 1 is 2 dBm (8 qdbm) */
wlc->band->antgain = 8;
} else if (wlc->band->antgain == -1) {
wiphy_err(wlc->wiphy, "wl%d: %s: Invalid antennas available in"
" srom, using 2dB\n", unit, __func__);
wlc->band->antgain = 8;
} else {
s8 gain, fract;
/* Older sroms specified gain in whole dbm only. In order
* be able to specify qdbm granularity and remain backward compatible
* the whole dbms are now encoded in only low 6 bits and remaining qdbms
* are encoded in the hi 2 bits. 6 bit signed number ranges from
* -32 - 31. Examples: 0x1 = 1 db,
* 0xc1 = 1.75 db (1 + 3 quarters),
* 0x3f = -1 (-1 + 0 quarters),
* 0x7f = -.75 (-1 in low 6 bits + 1 quarters in hi 2 bits) = -3 qdbm.
* 0xbf = -.50 (-1 in low 6 bits + 2 quarters in hi 2 bits) = -2 qdbm.
*/
gain = wlc->band->antgain & 0x3f;
gain <<= 2; /* Sign extend */
gain >>= 2;
fract = (wlc->band->antgain & 0xc0) >> 6;
wlc->band->antgain = 4 * gain + fract;
}
}

static bool brcms_c_attach_stf_ant_init(struct brcms_c_info *wlc)
{
int aa;
uint unit;
char *vars;
int bandtype;

unit = wlc->pub->unit;
vars = wlc->pub->vars;
bandtype = wlc->band->bandtype;

/* get antennas available */
aa = (s8) getintvar(vars, (BAND_5G(bandtype) ? "aa5g" : "aa2g"));
if (aa == 0)
aa = (s8) getintvar(vars,
(BAND_5G(bandtype) ? "aa1" : "aa0"));
if ((aa < 1) || (aa > 15)) {
wiphy_err(wlc->wiphy, "wl%d: %s: Invalid antennas available in"
" srom (0x%x), using 3\n", unit, __func__, aa);
aa = 3;
}

/* reset the defaults if we have a single antenna */
if (aa == 1) {
wlc->stf->ant_rx_ovr = ANT_RX_DIV_FORCE_0;
wlc->stf->txant = ANT_TX_FORCE_0;
} else if (aa == 2) {
wlc->stf->ant_rx_ovr = ANT_RX_DIV_FORCE_1;
wlc->stf->txant = ANT_TX_FORCE_1;
} else {
}

/* Compute Antenna Gain */
wlc->band->antgain =
(s8) getintvar(vars, (BAND_5G(bandtype) ? "ag1" : "ag0"));
brcms_c_attach_antgain_init(wlc);

return true;
}

static void brcms_c_timers_deinit(struct brcms_c_info *wlc)
{
/* free timer state */
if (wlc->wdtimer) {
brcms_free_timer(wlc->wl, wlc->wdtimer);
wlc->wdtimer = NULL;
}
if (wlc->radio_timer) {
brcms_free_timer(wlc->wl, wlc->radio_timer);
wlc->radio_timer = NULL;
}
}

static void brcms_c_detach_module(struct brcms_c_info *wlc)
{
if (wlc->asi) {
brcms_c_antsel_detach(wlc->asi);
wlc->asi = NULL;
}

if (wlc->ampdu) {
brcms_c_ampdu_detach(wlc->ampdu);
wlc->ampdu = NULL;
}

brcms_c_stf_detach(wlc);
}

/*
* low level detach
*/
int brcms_b_detach(struct brcms_c_info *wlc)
{
uint i;
struct brcms_hw_band *band;
struct brcms_hardware *wlc_hw = wlc->hw;
int callbacks;

callbacks = 0;

if (wlc_hw->sih) {
/* detach interrupt sync mechanism since interrupt is disabled and per-port
* interrupt object may has been freed. this must be done before sb core switch
*/
ai_deregister_intr_callback(wlc_hw->sih);

if (wlc_hw->sih->bustype == PCI_BUS)
ai_pci_sleep(wlc_hw->sih);
}

brcms_b_detach_dmapio(wlc_hw);

band = wlc_hw->band;
for (i = 0; i < NBANDS_HW(wlc_hw); i++) {
if (band->pi) {
/* Detach this band's phy */
wlc_phy_detach(band->pi);
band->pi = NULL;
}
band = wlc_hw->bandstate[OTHERBANDUNIT(wlc)];
}

/* Free shared phy state */
kfree(wlc_hw->phy_sh);

wlc_phy_shim_detach(wlc_hw->physhim);

/* free vars */
kfree(wlc_hw->vars);
wlc_hw->vars = NULL;

if (wlc_hw->sih) {
ai_detach(wlc_hw->sih);
wlc_hw->sih = NULL;
}

return callbacks;

}

/*
* Return a count of the number of driver callbacks still pending.
*
* General policy is that brcms_c_detach can only dealloc/free software states.
* It can NOT touch hardware registers since the d11core may be in reset and
* clock may not be available.
* One exception is sb register access, which is possible if crystal is turned
* on after "down" state, driver should avoid software timer with the exception
* of radio_monitor.
*/
uint brcms_c_detach(struct brcms_c_info *wlc)
{
uint callbacks = 0;

if (wlc == NULL)
return 0;

BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

callbacks += brcms_b_detach(wlc);

/* delete software timers */
if (!brcms_c_radio_monitor_stop(wlc))
callbacks++;

brcms_c_channel_mgr_detach(wlc->cmi);

brcms_c_timers_deinit(wlc);

brcms_c_detach_module(wlc);

while (wlc->tx_queues != NULL)
brcms_c_txq_free(wlc, wlc->tx_queues);

brcms_c_detach_mfree(wlc);
return callbacks;
}

/* update state that depends on the current value of "ap" */
void brcms_c_ap_upd(struct brcms_c_info *wlc)
{
if (AP_ENAB(wlc->pub))
/* AP: short not allowed, but not enforced */
wlc->PLCPHdr_override = BRCMS_PLCP_AUTO;
else
/* STA-BSS; short capable */
wlc->PLCPHdr_override = BRCMS_PLCP_SHORT;

/* fixup mpc */
wlc->mpc = true;
}

/* read hwdisable state and propagate to wlc flag */
static void brcms_c_radio_hwdisable_upd(struct brcms_c_info *wlc)
{
if (wlc->pub->wlfeatureflag & WL_SWFL_NOHWRADIO || wlc->pub->hw_off)
return;

if (brcms_b_radio_read_hwdisabled(wlc->hw)) {
mboolset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE);
} else {
mboolclr(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE);
}
}

/* return true if Minimum Power Consumption should be entered, false otherwise */
bool brcms_c_is_non_delay_mpc(struct brcms_c_info *wlc)
{
return false;
}

bool brcms_c_ismpc(struct brcms_c_info *wlc)
{
return (wlc->mpc_delay_off == 0) && (brcms_c_is_non_delay_mpc(wlc));
}

void brcms_c_radio_mpc_upd(struct brcms_c_info *wlc)
{
bool mpc_radio, radio_state;

/*
* Clear the WL_RADIO_MPC_DISABLE bit when mpc feature is disabled
* in case the WL_RADIO_MPC_DISABLE bit was set. Stop the radio
* monitor also when WL_RADIO_MPC_DISABLE is the only reason that
* the radio is going down.
*/
if (!wlc->mpc) {
if (!wlc->pub->radio_disabled)
return;
mboolclr(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE);
brcms_c_radio_upd(wlc);
if (!wlc->pub->radio_disabled)
brcms_c_radio_monitor_stop(wlc);
return;
}

/*
* sync ismpc logic with WL_RADIO_MPC_DISABLE bit in wlc->pub->radio_disabled
* to go ON, always call radio_upd synchronously
* to go OFF, postpone radio_upd to later when context is safe(e.g. watchdog)
*/
radio_state =
(mboolisset(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE) ? OFF :
ON);
mpc_radio = (brcms_c_ismpc(wlc) == true) ? OFF : ON;

if (radio_state == ON && mpc_radio == OFF)
wlc->mpc_delay_off = wlc->mpc_dlycnt;
else if (radio_state == OFF && mpc_radio == ON) {
mboolclr(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE);
brcms_c_radio_upd(wlc);
if (wlc->mpc_offcnt < BRCMS_MPC_THRESHOLD)
wlc->mpc_dlycnt = BRCMS_MPC_MAX_DELAYCNT;
else
wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT;
wlc->mpc_dur += OSL_SYSUPTIME() - wlc->mpc_laston_ts;
}
/* Below logic is meant to capture the transition from mpc off to mpc on for reasons
* other than wlc->mpc_delay_off keeping the mpc off. In that case reset
* wlc->mpc_delay_off to wlc->mpc_dlycnt, so that we restart the countdown of mpc_delay_off
*/
if ((wlc->prev_non_delay_mpc == false) &&
(brcms_c_is_non_delay_mpc(wlc) == true) && wlc->mpc_delay_off) {
wlc->mpc_delay_off = wlc->mpc_dlycnt;
}
wlc->prev_non_delay_mpc = brcms_c_is_non_delay_mpc(wlc);
}

/*
* centralized radio disable/enable function,
* invoke radio enable/disable after updating hwradio status
*/
static void brcms_c_radio_upd(struct brcms_c_info *wlc)
{
if (wlc->pub->radio_disabled) {
brcms_c_radio_disable(wlc);
} else {
brcms_c_radio_enable(wlc);
}
}

/* maintain LED behavior in down state */
static void brcms_c_down_led_upd(struct brcms_c_info *wlc)
{
/* maintain LEDs while in down state, turn on sbclk if not available yet */
/* turn on sbclk if necessary */
if (!AP_ENAB(wlc->pub)) {
brcms_c_pllreq(wlc, true, BRCMS_PLLREQ_FLIP);

brcms_c_pllreq(wlc, false, BRCMS_PLLREQ_FLIP);
}
}

/* update hwradio status and return it */
bool brcms_c_check_radio_disabled(struct brcms_c_info *wlc)
{
brcms_c_radio_hwdisable_upd(wlc);

return mboolisset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE) ? true : false;
}

void brcms_c_radio_disable(struct brcms_c_info *wlc)
{
if (!wlc->pub->up) {
brcms_c_down_led_upd(wlc);
return;
}

brcms_c_radio_monitor_start(wlc);
brcms_down(wlc->wl);
}

static void brcms_c_radio_enable(struct brcms_c_info *wlc)
{
if (wlc->pub->up)
return;

if (DEVICEREMOVED(wlc))
return;

brcms_up(wlc->wl);
}

/* periodical query hw radio button while driver is "down" */
static void brcms_c_radio_timer(void *arg)
{
struct brcms_c_info *wlc = (struct brcms_c_info *) arg;

if (DEVICEREMOVED(wlc)) {
wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", wlc->pub->unit,
__func__);
brcms_down(wlc->wl);
return;
}

/* cap mpc off count */
if (wlc->mpc_offcnt < BRCMS_MPC_MAX_DELAYCNT)
wlc->mpc_offcnt++;

brcms_c_radio_hwdisable_upd(wlc);
brcms_c_radio_upd(wlc);
}

static bool brcms_c_radio_monitor_start(struct brcms_c_info *wlc)
{
/* Don't start the timer if HWRADIO feature is disabled */
if (wlc->radio_monitor || (wlc->pub->wlfeatureflag & WL_SWFL_NOHWRADIO))
return true;

wlc->radio_monitor = true;
brcms_c_pllreq(wlc, true, BRCMS_PLLREQ_RADIO_MON);
brcms_add_timer(wlc->wl, wlc->radio_timer, TIMER_INTERVAL_RADIOCHK,
true);
return true;
}

bool brcms_c_radio_monitor_stop(struct brcms_c_info *wlc)
{
if (!wlc->radio_monitor)
return true;

wlc->radio_monitor = false;
brcms_c_pllreq(wlc, false, BRCMS_PLLREQ_RADIO_MON);
return brcms_del_timer(wlc->wl, wlc->radio_timer);
}

/* common low-level watchdog code */
void brcms_b_watchdog(void *arg)
{
struct brcms_c_info *wlc = (struct brcms_c_info *) arg;
struct brcms_hardware *wlc_hw = wlc->hw;

BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit);

if (!wlc_hw->up)
return;

/* increment second count */
wlc_hw->now++;

/* Check for FIFO error interrupts */
brcms_b_fifoerrors(wlc_hw);

/* make sure RX dma has buffers */
dma_rxfill(wlc->hw->di[RX_FIFO]);

wlc_phy_watchdog(wlc_hw->band->pi);
}

static void brcms_c_watchdog_by_timer(void *arg)
{
brcms_c_watchdog(arg);
}

/* common watchdog code */
static void brcms_c_watchdog(void *arg)
{
struct brcms_c_info *wlc = (struct brcms_c_info *) arg;
int i;
struct brcms_bss_cfg *cfg;

BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

if (!wlc->pub->up)
return;

if (DEVICEREMOVED(wlc)) {
wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", wlc->pub->unit,
__func__);
brcms_down(wlc->wl);
return;
}

/* increment second count */
wlc->pub->now++;

/* delay radio disable */
if (wlc->mpc_delay_off) {
if (--wlc->mpc_delay_off == 0) {
mboolset(wlc->pub->radio_disabled,
WL_RADIO_MPC_DISABLE);
if (wlc->mpc && brcms_c_ismpc(wlc))
wlc->mpc_offcnt = 0;
wlc->mpc_laston_ts = OSL_SYSUPTIME();
}
}

/* mpc sync */
brcms_c_radio_mpc_upd(wlc);
/* radio sync: sw/hw/mpc --> radio_disable/radio_enable */
brcms_c_radio_hwdisable_upd(wlc);
brcms_c_radio_upd(wlc);
/* if radio is disable, driver may be down, quit here */
if (wlc->pub->radio_disabled)
return;

brcms_b_watchdog(wlc);

/* occasionally sample mac stat counters to detect 16-bit counter wrap */
if ((wlc->pub->now % SW_TIMER_MAC_STAT_UPD) == 0)
brcms_c_statsupd(wlc);

/* Manage TKIP countermeasures timers */
FOREACH_BSS(wlc, i, cfg)
if (cfg->tk_cm_dt) {
cfg->tk_cm_dt--;
}
if (cfg->tk_cm_bt) {
cfg->tk_cm_bt--;
}
END_FOREACH_BSS

/* Call any registered watchdog handlers */
for (i = 0; i < BRCMS_MAXMODULES; i++) {
if (wlc->modulecb[i].watchdog_fn)
wlc->modulecb[i].watchdog_fn(wlc->modulecb[i].hdl);
}

if (BRCMS_ISNPHY(wlc->band) && !wlc->pub->tempsense_disable &&
((wlc->pub->now - wlc->tempsense_lasttime) >=
BRCMS_TEMPSENSE_PERIOD)) {
wlc->tempsense_lasttime = wlc->pub->now;
brcms_c_tempsense_upd(wlc);
}
}

/* Initialize just the hardware when coming out of POR or S3/S5 system states */
void brcms_b_hw_up(struct brcms_hardware *wlc_hw)
{
if (wlc_hw->wlc->pub->hw_up)
return;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

/*
* Enable pll and xtal, initialize the power control registers,
* and force fastclock for the remainder of brcms_c_up().
*/
brcms_b_xtal(wlc_hw, ON);
ai_clkctl_init(wlc_hw->sih);
brcms_b_clkctl_clk(wlc_hw, CLK_FAST);

if (wlc_hw->sih->bustype == PCI_BUS) {
ai_pci_fixcfg(wlc_hw->sih);

/* AI chip doesn't restore bar0win2 on hibernation/resume, need sw fixup */
if ((wlc_hw->sih->chip == BCM43224_CHIP_ID) ||
(wlc_hw->sih->chip == BCM43225_CHIP_ID))
wlc_hw->regs = (struct d11regs *)
ai_setcore(wlc_hw->sih, D11_CORE_ID, 0);
}

/* Inform phy that a POR reset has occurred so it does a complete phy init */
wlc_phy_por_inform(wlc_hw->band->pi);

wlc_hw->ucode_loaded = false;
wlc_hw->wlc->pub->hw_up = true;

if ((wlc_hw->boardflags & BFL_FEM)
&& (wlc_hw->sih->chip == BCM4313_CHIP_ID)) {
if (!
(wlc_hw->boardrev >= 0x1250
&& (wlc_hw->boardflags & BFL_FEM_BT)))
ai_epa_4313war(wlc_hw->sih);
}
}

int brcms_b_up_prep(struct brcms_hardware *wlc_hw)
{
uint coremask;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

/*
* Enable pll and xtal, initialize the power control registers,
* and force fastclock for the remainder of brcms_c_up().
*/
brcms_b_xtal(wlc_hw, ON);
ai_clkctl_init(wlc_hw->sih);
brcms_b_clkctl_clk(wlc_hw, CLK_FAST);

/*
* Configure pci/pcmcia here instead of in brcms_c_attach()
* to allow mfg hotswap: down, hotswap (chip power cycle), up.
*/
coremask = (1 << wlc_hw->wlc->core->coreidx);

if (wlc_hw->sih->bustype == PCI_BUS)
ai_pci_setup(wlc_hw->sih, coremask);

/*
* Need to read the hwradio status here to cover the case where the system
* is loaded with the hw radio disabled. We do not want to bring the driver up in this case.
*/
if (brcms_b_radio_read_hwdisabled(wlc_hw)) {
/* put SB PCI in down state again */
if (wlc_hw->sih->bustype == PCI_BUS)
ai_pci_down(wlc_hw->sih);
brcms_b_xtal(wlc_hw, OFF);
return -ENOMEDIUM;
}

if (wlc_hw->sih->bustype == PCI_BUS)
ai_pci_up(wlc_hw->sih);

/* reset the d11 core */
brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS);

return 0;
}

int brcms_b_up_finish(struct brcms_hardware *wlc_hw)
{
BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

wlc_hw->up = true;
wlc_phy_hw_state_upd(wlc_hw->band->pi, true);

/* FULLY enable dynamic power control and d11 core interrupt */
brcms_b_clkctl_clk(wlc_hw, CLK_DYNAMIC);
brcms_intrson(wlc_hw->wlc->wl);
return 0;
}

/* make interface operational */
int brcms_c_up(struct brcms_c_info *wlc)
{
BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

/* HW is turned off so don't try to access it */
if (wlc->pub->hw_off || DEVICEREMOVED(wlc))
return -ENOMEDIUM;

if (!wlc->pub->hw_up) {
brcms_b_hw_up(wlc->hw);
wlc->pub->hw_up = true;
}

if ((wlc->pub->boardflags & BFL_FEM)
&& (wlc->pub->sih->chip == BCM4313_CHIP_ID)) {
if (wlc->pub->boardrev >= 0x1250
&& (wlc->pub->boardflags & BFL_FEM_BT)) {
brcms_c_mhf(wlc, MHF5, MHF5_4313_GPIOCTRL,
MHF5_4313_GPIOCTRL, BRCM_BAND_ALL);
} else {
brcms_c_mhf(wlc, MHF4, MHF4_EXTPA_ENABLE,
MHF4_EXTPA_ENABLE, BRCM_BAND_ALL);
}
}

/*
* Need to read the hwradio status here to cover the case where the system
* is loaded with the hw radio disabled. We do not want to bring the driver up in this case.
* if radio is disabled, abort up, lower power, start radio timer and return 0(for NDIS)
* don't call radio_update to avoid looping brcms_c_up.
*
* brcms_b_up_prep() returns either 0 or -BCME_RADIOOFF only
*/
if (!wlc->pub->radio_disabled) {
int status = brcms_b_up_prep(wlc->hw);
if (status == -ENOMEDIUM) {
if (!mboolisset
(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE)) {
int idx;
struct brcms_bss_cfg *bsscfg;
mboolset(wlc->pub->radio_disabled,
WL_RADIO_HW_DISABLE);

FOREACH_BSS(wlc, idx, bsscfg)
if (!BSSCFG_STA(bsscfg)
|| !bsscfg->enable || !bsscfg->BSS)
continue;
wiphy_err(wlc->wiphy, "wl%d.%d: up"
": rfdisable -> "
"bsscfg_disable()\n",
wlc->pub->unit, idx);
END_FOREACH_BSS
}
}
}

if (wlc->pub->radio_disabled) {
brcms_c_radio_monitor_start(wlc);
return 0;
}

/* brcms_b_up_prep has done brcms_c_corereset(). so clk is on, set it */
wlc->clk = true;

brcms_c_radio_monitor_stop(wlc);

/* Set EDCF hostflags */
if (EDCF_ENAB(wlc->pub)) {
brcms_c_mhf(wlc, MHF1, MHF1_EDCF, MHF1_EDCF, BRCM_BAND_ALL);
} else {
brcms_c_mhf(wlc, MHF1, MHF1_EDCF, 0, BRCM_BAND_ALL);
}

if (BRCMS_WAR16165(wlc))
brcms_c_mhf(wlc, MHF2, MHF2_PCISLOWCLKWAR, MHF2_PCISLOWCLKWAR,
BRCM_BAND_ALL);

brcms_init(wlc->wl);
wlc->pub->up = true;

if (wlc->bandinit_pending) {
brcms_c_suspend_mac_and_wait(wlc);
brcms_c_set_chanspec(wlc, wlc->default_bss->chanspec);
wlc->bandinit_pending = false;
brcms_c_enable_mac(wlc);
}

brcms_b_up_finish(wlc->hw);

/* other software states up after ISR is running */
/* start APs that were to be brought up but are not up yet */
/* if (AP_ENAB(wlc->pub)) brcms_c_restart_ap(wlc->ap); */

/* Program the TX wme params with the current settings */
brcms_c_wme_retries_write(wlc);

/* start one second watchdog timer */
brcms_add_timer(wlc->wl, wlc->wdtimer, TIMER_INTERVAL_WATCHDOG, true);
wlc->WDarmed = true;

/* ensure antenna config is up to date */
brcms_c_stf_phy_txant_upd(wlc);
/* ensure LDPC config is in sync */
brcms_c_ht_update_ldpc(wlc, wlc->stf->ldpc);

return 0;
}

/* Initialize the base precedence map for dequeueing from txq based on WME settings */
static void brcms_c_tx_prec_map_init(struct brcms_c_info *wlc)
{
wlc->tx_prec_map = BRCMS_PREC_BMP_ALL;
memset(wlc->fifo2prec_map, 0, NFIFO * sizeof(u16));

/* For non-WME, both fifos have overlapping MAXPRIO. So just disable all precedences
* if either is full.
*/
if (!EDCF_ENAB(wlc->pub)) {
wlc->fifo2prec_map[TX_DATA_FIFO] = BRCMS_PREC_BMP_ALL;
wlc->fifo2prec_map[TX_CTL_FIFO] = BRCMS_PREC_BMP_ALL;
} else {
wlc->fifo2prec_map[TX_AC_BK_FIFO] = BRCMS_PREC_BMP_AC_BK;
wlc->fifo2prec_map[TX_AC_BE_FIFO] = BRCMS_PREC_BMP_AC_BE;
wlc->fifo2prec_map[TX_AC_VI_FIFO] = BRCMS_PREC_BMP_AC_VI;
wlc->fifo2prec_map[TX_AC_VO_FIFO] = BRCMS_PREC_BMP_AC_VO;
}
}

static uint brcms_c_down_del_timer(struct brcms_c_info *wlc)
{
uint callbacks = 0;

return callbacks;
}

int brcms_b_bmac_down_prep(struct brcms_hardware *wlc_hw)
{
bool dev_gone;
uint callbacks = 0;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

if (!wlc_hw->up)
return callbacks;

dev_gone = DEVICEREMOVED(wlc_hw->wlc);

/* disable interrupts */
if (dev_gone)
wlc_hw->wlc->macintmask = 0;
else {
/* now disable interrupts */
brcms_intrsoff(wlc_hw->wlc->wl);

/* ensure we're running on the pll clock again */
brcms_b_clkctl_clk(wlc_hw, CLK_FAST);
}
/* down phy at the last of this stage */
callbacks += wlc_phy_down(wlc_hw->band->pi);

return callbacks;
}

int brcms_b_down_finish(struct brcms_hardware *wlc_hw)
{
uint callbacks = 0;
bool dev_gone;

BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

if (!wlc_hw->up)
return callbacks;

wlc_hw->up = false;
wlc_phy_hw_state_upd(wlc_hw->band->pi, false);

dev_gone = DEVICEREMOVED(wlc_hw->wlc);

if (dev_gone) {
wlc_hw->sbclk = false;
wlc_hw->clk = false;
wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false);

/* reclaim any posted packets */
brcms_c_flushqueues(wlc_hw->wlc);
} else {

/* Reset and disable the core */
if (ai_iscoreup(wlc_hw->sih)) {
if (R_REG(&wlc_hw->regs->maccontrol) &
MCTL_EN_MAC)
brcms_c_suspend_mac_and_wait(wlc_hw->wlc);
callbacks += brcms_reset(wlc_hw->wlc->wl);
brcms_c_coredisable(wlc_hw);
}

/* turn off primary xtal and pll */
if (!wlc_hw->noreset) {
if (wlc_hw->sih->bustype == PCI_BUS)
ai_pci_down(wlc_hw->sih);
brcms_b_xtal(wlc_hw, OFF);
}
}

return callbacks;
}

/*
* Mark the interface nonoperational, stop the software mechanisms,
* disable the hardware, free any transient buffer state.
* Return a count of the number of driver callbacks still pending.
*/
uint brcms_c_down(struct brcms_c_info *wlc)
{

uint callbacks = 0;
int i;
bool dev_gone = false;
struct brcms_txq_info *qi;

BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

/* check if we are already in the going down path */
if (wlc->going_down) {
wiphy_err(wlc->wiphy, "wl%d: %s: Driver going down so return"
"\n", wlc->pub->unit, __func__);
return 0;
}
if (!wlc->pub->up)
return callbacks;

/* in between, mpc could try to bring down again.. */
wlc->going_down = true;

callbacks += brcms_b_bmac_down_prep(wlc->hw);

dev_gone = DEVICEREMOVED(wlc);

/* Call any registered down handlers */
for (i = 0; i < BRCMS_MAXMODULES; i++) {
if (wlc->modulecb[i].down_fn)
callbacks +=
wlc->modulecb[i].down_fn(wlc->modulecb[i].hdl);
}

/* cancel the watchdog timer */
if (wlc->WDarmed) {
if (!brcms_del_timer(wlc->wl, wlc->wdtimer))
callbacks++;
wlc->WDarmed = false;
}
/* cancel all other timers */
callbacks += brcms_c_down_del_timer(wlc);

wlc->pub->up = false;

wlc_phy_mute_upd(wlc->band->pi, false, PHY_MUTE_ALL);

/* clear txq flow control */
brcms_c_txflowcontrol_reset(wlc);

/* flush tx queues */
for (qi = wlc->tx_queues; qi != NULL; qi = qi->next) {
brcmu_pktq_flush(&qi->q, true, NULL, NULL);
}

callbacks += brcms_b_down_finish(wlc->hw);

/* brcms_b_down_finish has done brcms_c_coredisable(). so clk is off */
wlc->clk = false;

wlc->going_down = false;
return callbacks;
}

/* Set the current gmode configuration */
int brcms_c_set_gmode(struct brcms_c_info *wlc, u8 gmode, bool config)
{
int ret = 0;
uint i;
struct brcms_c_rateset rs;
/* Default to 54g Auto */
/* Advertise and use shortslot (-1/0/1 Auto/Off/On) */
s8 shortslot = BRCMS_SHORTSLOT_AUTO;
bool shortslot_restrict = false; /* Restrict association to stations that support shortslot
*/
bool ofdm_basic = false; /* Make 6, 12, and 24 basic rates */
/* Advertise and use short preambles (-1/0/1 Auto/Off/On) */
int preamble = BRCMS_PLCP_LONG;
bool preamble_restrict = false; /* Restrict association to stations that support short
* preambles
*/
struct brcms_band *band;

/* if N-support is enabled, allow Gmode set as long as requested
* Gmode is not GMODE_LEGACY_B
*/
if (N_ENAB(wlc->pub) && gmode == GMODE_LEGACY_B)
return -ENOTSUPP;

/* verify that we are dealing with 2G band and grab the band pointer */
if (wlc->band->bandtype == BRCM_BAND_2G)
band = wlc->band;
else if ((NBANDS(wlc) > 1) &&
(wlc->bandstate[OTHERBANDUNIT(wlc)]->bandtype == BRCM_BAND_2G))
band = wlc->bandstate[OTHERBANDUNIT(wlc)];
else
return -EINVAL;

/* Legacy or bust when no OFDM is supported by regulatory */
if ((brcms_c_channel_locale_flags_in_band(wlc->cmi, band->bandunit) &
BRCMS_NO_OFDM) && (gmode != GMODE_LEGACY_B))
return -EINVAL;

/* update configuration value */
if (config == true)
brcms_c_protection_upd(wlc, BRCMS_PROT_G_USER, gmode);

/* Clear supported rates filter */
memset(&wlc->sup_rates_override, 0, sizeof(struct brcms_c_rateset));

/* Clear rateset override */
memset(&rs, 0, sizeof(struct brcms_c_rateset));

switch (gmode) {
case GMODE_LEGACY_B:
shortslot = BRCMS_SHORTSLOT_OFF;
brcms_c_rateset_copy(&gphy_legacy_rates, &rs);

break;

case GMODE_LRS:
if (AP_ENAB(wlc->pub))
brcms_c_rateset_copy(&cck_rates,
&wlc->sup_rates_override);
break;

case GMODE_AUTO:
/* Accept defaults */
break;

case GMODE_ONLY:
ofdm_basic = true;
preamble = BRCMS_PLCP_SHORT;
preamble_restrict = true;
break;

case GMODE_PERFORMANCE:
if (AP_ENAB(wlc->pub)) /* Put all rates into the Supported Rates element */
brcms_c_rateset_copy(&cck_ofdm_rates,
&wlc->sup_rates_override);

shortslot = BRCMS_SHORTSLOT_ON;
shortslot_restrict = true;
ofdm_basic = true;
preamble = BRCMS_PLCP_SHORT;
preamble_restrict = true;
break;

default:
/* Error */
wiphy_err(wlc->wiphy, "wl%d: %s: invalid gmode %d\n",
wlc->pub->unit, __func__, gmode);
return -ENOTSUPP;
}

/*
* If we are switching to gmode == GMODE_LEGACY_B,
* clean up rate info that may refer to OFDM rates.
*/
if ((gmode == GMODE_LEGACY_B) && (band->gmode != GMODE_LEGACY_B)) {
band->gmode = gmode;
if (band->rspec_override && !IS_CCK(band->rspec_override)) {
band->rspec_override = 0;
brcms_c_reprate_init(wlc);
}
if (band->mrspec_override && !IS_CCK(band->mrspec_override)) {
band->mrspec_override = 0;
}
}

band->gmode = gmode;

wlc->shortslot_override = shortslot;

if (AP_ENAB(wlc->pub)) {
/* wlc->ap->shortslot_restrict = shortslot_restrict; */
wlc->PLCPHdr_override =
(preamble !=
BRCMS_PLCP_LONG) ? BRCMS_PLCP_SHORT : BRCMS_PLCP_AUTO;
}

if ((AP_ENAB(wlc->pub) && preamble != BRCMS_PLCP_LONG)
|| preamble == BRCMS_PLCP_SHORT)
wlc->default_bss->capability |= WLAN_CAPABILITY_SHORT_PREAMBLE;
else
wlc->default_bss->capability &= ~WLAN_CAPABILITY_SHORT_PREAMBLE;

/* Update shortslot capability bit for AP and IBSS */
if ((AP_ENAB(wlc->pub) && shortslot == BRCMS_SHORTSLOT_AUTO) ||
shortslot == BRCMS_SHORTSLOT_ON)
wlc->default_bss->capability |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
else
wlc->default_bss->capability &=
~WLAN_CAPABILITY_SHORT_SLOT_TIME;

/* Use the default 11g rateset */
if (!rs.count)
brcms_c_rateset_copy(&cck_ofdm_rates, &rs);

if (ofdm_basic) {
for (i = 0; i < rs.count; i++) {
if (rs.rates[i] == BRCM_RATE_6M
|| rs.rates[i] == BRCM_RATE_12M
|| rs.rates[i] == BRCM_RATE_24M)
rs.rates[i] |= BRCMS_RATE_FLAG;
}
}

/* Set default bss rateset */
wlc->default_bss->rateset.count = rs.count;
memcpy(wlc->default_bss->rateset.rates, rs.rates,
sizeof(wlc->default_bss->rateset.rates));

return ret;
}

static int brcms_c_nmode_validate(struct brcms_c_info *wlc, s32 nmode)
{
int err = 0;

switch (nmode) {

case OFF:
break;

case AUTO:
case WL_11N_2x2:
case WL_11N_3x3:
if (!(BRCMS_PHY_11N_CAP(wlc->band)))
err = -EINVAL;
break;

default:
err = -EINVAL;
break;
}

return err;
}

int brcms_c_set_nmode(struct brcms_c_info *wlc, s32 nmode)
{
uint i;
int err;

err = brcms_c_nmode_validate(wlc, nmode);
if (err)
return err;

switch (nmode) {
case OFF:
wlc->pub->_n_enab = OFF;
wlc->default_bss->flags &= ~BRCMS_BSS_HT;
/* delete the mcs rates from the default and hw ratesets */
brcms_c_rateset_mcs_clear(&wlc->default_bss->rateset);
for (i = 0; i < NBANDS(wlc); i++) {
memset(wlc->bandstate[i]->hw_rateset.mcs, 0,
MCSSET_LEN);
if (IS_MCS(wlc->band->rspec_override)) {
wlc->bandstate[i]->rspec_override = 0;
brcms_c_reprate_init(wlc);
}
if (IS_MCS(wlc->band->mrspec_override))
wlc->bandstate[i]->mrspec_override = 0;
}
break;

case AUTO:
if (wlc->stf->txstreams == WL_11N_3x3)
nmode = WL_11N_3x3;
else
nmode = WL_11N_2x2;
case WL_11N_2x2:
case WL_11N_3x3:
/* force GMODE_AUTO if NMODE is ON */
brcms_c_set_gmode(wlc, GMODE_AUTO, true);
if (nmode == WL_11N_3x3)
wlc->pub->_n_enab = SUPPORT_HT;
else
wlc->pub->_n_enab = SUPPORT_11N;
wlc->default_bss->flags |= BRCMS_BSS_HT;
/* add the mcs rates to the default and hw ratesets */
brcms_c_rateset_mcs_build(&wlc->default_bss->rateset,
wlc->stf->txstreams);
for (i = 0; i < NBANDS(wlc); i++)
memcpy(wlc->bandstate[i]->hw_rateset.mcs,
wlc->default_bss->rateset.mcs, MCSSET_LEN);
break;

default:
break;
}

return err;
}

static int
brcms_c_set_rateset(struct brcms_c_info *wlc, struct brcms_c_rateset *rs_arg)
{
struct brcms_c_rateset rs, new;
uint bandunit;

memcpy(&rs, rs_arg, sizeof(struct brcms_c_rateset));

/* check for bad count value */
if ((rs.count == 0) || (rs.count > BRCMS_NUMRATES))
return -EINVAL;

/* try the current band */
bandunit = wlc->band->bandunit;
memcpy(&new, &rs, sizeof(struct brcms_c_rateset));
if (brcms_c_rate_hwrs_filter_sort_validate
(&new, &wlc->bandstate[bandunit]->hw_rateset, true,
wlc->stf->txstreams))
goto good;

/* try the other band */
if (IS_MBAND_UNLOCKED(wlc)) {
bandunit = OTHERBANDUNIT(wlc);
memcpy(&new, &rs, sizeof(struct brcms_c_rateset));
if (brcms_c_rate_hwrs_filter_sort_validate(&new,
&wlc->
bandstate[bandunit]->
hw_rateset, true,
wlc->stf->txstreams))
goto good;
}

return -EBADE;

good:
/* apply new rateset */
memcpy(&wlc->default_bss->rateset, &new,
sizeof(struct brcms_c_rateset));
memcpy(&wlc->bandstate[bandunit]->defrateset, &new,
sizeof(struct brcms_c_rateset));
return 0;
}

/* simplified integer set interface for common ioctl handler */
int brcms_c_set(struct brcms_c_info *wlc, int cmd, int arg)
{
return brcms_c_ioctl(wlc, cmd, (void *)&arg, sizeof(arg), NULL);
}

/* simplified integer get interface for common ioctl handler */
int brcms_c_get(struct brcms_c_info *wlc, int cmd, int *arg)
{
return brcms_c_ioctl(wlc, cmd, arg, sizeof(int), NULL);
}

static void brcms_c_ofdm_rateset_war(struct brcms_c_info *wlc)
{
u8 r;
bool war = false;

if (wlc->cfg->associated)
r = wlc->cfg->current_bss->rateset.rates[0];
else
r = wlc->default_bss->rateset.rates[0];

wlc_phy_ofdm_rateset_war(wlc->band->pi, war);

return;
}

int
brcms_c_ioctl(struct brcms_c_info *wlc, int cmd, void *arg, int len,
struct brcms_c_if *wlcif)
{
return _brcms_c_ioctl(wlc, cmd, arg, len, wlcif);
}

/* common ioctl handler. return: 0=ok, -1=error, positive=particular error */
static int
_brcms_c_ioctl(struct brcms_c_info *wlc, int cmd, void *arg, int len,
struct brcms_c_if *wlcif)
{
int val, *pval;
bool bool_val;
int bcmerror;
struct scb *nextscb;
bool ta_ok;
uint band;
struct brcms_bss_cfg *bsscfg;
struct brcms_bss_info *current_bss;

/* update bsscfg pointer */
bsscfg = wlc->cfg;
current_bss = bsscfg->current_bss;

/* initialize the following to get rid of compiler warning */
nextscb = NULL;
ta_ok = false;
band = 0;

/* If the device is turned off, then it's not "removed" */
if (!wlc->pub->hw_off && DEVICEREMOVED(wlc)) {
wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", wlc->pub->unit,
__func__);
brcms_down(wlc->wl);
return -EBADE;
}

/* default argument is generic integer */
pval = arg ? (int *)arg : NULL;

/* This will prevent the misaligned access */
if (pval && (u32) len >= sizeof(val))
memcpy(&val, pval, sizeof(val));
else
val = 0;

/* bool conversion to avoid duplication below */
bool_val = val != 0;
bcmerror = 0;

if ((arg == NULL) || (len <= 0)) {
wiphy_err(wlc->wiphy, "wl%d: %s: Command %d needs arguments\n",
wlc->pub->unit, __func__, cmd);
bcmerror = -EINVAL;
goto done;
}

switch (cmd) {

case BRCM_SET_CHANNEL:{
u16 chspec = CH20MHZ_CHSPEC(val);

if (val < 0 || val > MAXCHANNEL) {
bcmerror = -EINVAL;
break;
}

if (!brcms_c_valid_chanspec_db(wlc->cmi, chspec)) {
bcmerror = -EINVAL;
break;
}

if (!wlc->pub->up && IS_MBAND_UNLOCKED(wlc)) {
if (wlc->band->bandunit !=
CHSPEC_BANDUNIT(chspec))
wlc->bandinit_pending = true;
else
wlc->bandinit_pending = false;
}

wlc->default_bss->chanspec = chspec;
/* brcms_c_BSSinit() will sanitize the rateset before
* using it.. */
if (wlc->pub->up &&
(BRCMS_BAND_PI_RADIO_CHANSPEC != chspec)) {
brcms_c_set_home_chanspec(wlc, chspec);
brcms_c_suspend_mac_and_wait(wlc);
brcms_c_set_chanspec(wlc, chspec);
brcms_c_enable_mac(wlc);
}
break;
}

case BRCM_SET_SRL:
if (val >= 1 && val <= RETRY_SHORT_MAX) {
int ac;
wlc->SRL = (u16) val;

brcms_b_retrylimit_upd(wlc->hw, wlc->SRL, wlc->LRL);

for (ac = 0; ac < AC_COUNT; ac++) {
BRCMS_WME_RETRY_SHORT_SET(wlc, ac, wlc->SRL);
}
brcms_c_wme_retries_write(wlc);
} else
bcmerror = -EINVAL;
break;

case BRCM_SET_LRL:
if (val >= 1 && val <= 255) {
int ac;
wlc->LRL = (u16) val;

brcms_b_retrylimit_upd(wlc->hw, wlc->SRL, wlc->LRL);

for (ac = 0; ac < AC_COUNT; ac++) {
BRCMS_WME_RETRY_LONG_SET(wlc, ac, wlc->LRL);
}
brcms_c_wme_retries_write(wlc);
} else
bcmerror = -EINVAL;
break;

case BRCM_GET_CURR_RATESET:{
struct brcm_rateset *ret_rs =
(struct brcm_rateset *) arg;
struct brcms_c_rateset *rs;

if (wlc->pub->associated)
rs = &current_bss->rateset;
else
rs = &wlc->default_bss->rateset;

if (len < (int)(rs->count + sizeof(rs->count))) {
bcmerror = -EOVERFLOW;
break;
}

/* Copy only legacy rateset section */
ret_rs->count = rs->count;
memcpy(&ret_rs->rates, &rs->rates, rs->count);
break;
}

case BRCM_SET_RATESET:{
struct brcms_c_rateset rs;
struct brcm_rateset *in_rs =
(struct brcm_rateset *) arg;

if (len < (int)(in_rs->count + sizeof(in_rs->count))) {
bcmerror = -EOVERFLOW;
break;
}

if (in_rs->count > BRCMS_NUMRATES) {
bcmerror = -ENOBUFS;
break;
}

memset(&rs, 0, sizeof(struct brcms_c_rateset));

/* Copy only legacy rateset section */
rs.count = in_rs->count;
memcpy(&rs.rates, &in_rs->rates, rs.count);

/* merge rateset coming in with the current mcsset */
if (N_ENAB(wlc->pub)) {
if (bsscfg->associated)
memcpy(rs.mcs,
&current_bss->rateset.mcs[0],
MCSSET_LEN);
else
memcpy(rs.mcs,
&wlc->default_bss->rateset.mcs[0],
MCSSET_LEN);
}

bcmerror = brcms_c_set_rateset(wlc, &rs);

if (!bcmerror)
brcms_c_ofdm_rateset_war(wlc);

break;
}

case BRCM_SET_BCNPRD:
/* range [1, 0xffff] */
if (val >= DOT11_MIN_BEACON_PERIOD
&& val <= DOT11_MAX_BEACON_PERIOD)
wlc->default_bss->beacon_period = (u16) val;
else
bcmerror = -EINVAL;
break;

case BRCM_GET_PHYLIST:
{
unsigned char *cp = arg;
if (len < 3) {
bcmerror = -EOVERFLOW;
break;
}

if (BRCMS_ISNPHY(wlc->band))
*cp++ = 'n';
else if (BRCMS_ISLCNPHY(wlc->band))
*cp++ = 'c';
else if (BRCMS_ISSSLPNPHY(wlc->band))
*cp++ = 's';
*cp = '\0';
break;
}

case BRCMS_SET_SHORTSLOT_OVERRIDE:
if (val != BRCMS_SHORTSLOT_AUTO && val != BRCMS_SHORTSLOT_OFF &&
val != BRCMS_SHORTSLOT_ON) {
bcmerror = -EINVAL;
break;
}

wlc->shortslot_override = (s8) val;

/* shortslot is an 11g feature, so no more work if we are
* currently on the 5G band
*/
if (BAND_5G(wlc->band->bandtype))
break;

if (wlc->pub->up && wlc->pub->associated) {
/* let watchdog or beacon processing update shortslot */
} else if (wlc->pub->up) {
/* unassociated shortslot is off */
brcms_c_switch_shortslot(wlc, false);
} else {
/* driver is down, so just update the brcms_c_info
* value */
if (wlc->shortslot_override == BRCMS_SHORTSLOT_AUTO) {
wlc->shortslot = false;
} else {
wlc->shortslot =
(wlc->shortslot_override ==
BRCMS_SHORTSLOT_ON);
}
}

break;

}
done:

if (bcmerror)
wlc->pub->bcmerror = bcmerror;

return bcmerror;
}

/*
* register watchdog and down handlers.
*/
int brcms_c_module_register(struct brcms_pub *pub,
const char *name, void *hdl,
int (*w_fn)(void *handle), int (*d_fn)(void *handle))
{
struct brcms_c_info *wlc = (struct brcms_c_info *) pub->wlc;
int i;

/* find an empty entry and just add, no duplication check! */
for (i = 0; i < BRCMS_MAXMODULES; i++) {
if (wlc->modulecb[i].name[0] == '\0') {
strncpy(wlc->modulecb[i].name, name,
sizeof(wlc->modulecb[i].name) - 1);
wlc->modulecb[i].hdl = hdl;
wlc->modulecb[i].watchdog_fn = w_fn;
wlc->modulecb[i].down_fn = d_fn;
return 0;
}
}

return -ENOSR;
}

/* unregister module callbacks */
int
brcms_c_module_unregister(struct brcms_pub *pub, const char *name, void *hdl)
{
struct brcms_c_info *wlc = (struct brcms_c_info *) pub->wlc;
int i;

if (wlc == NULL)
return -ENODATA;

for (i = 0; i < BRCMS_MAXMODULES; i++) {
if (!strcmp(wlc->modulecb[i].name, name) &&
(wlc->modulecb[i].hdl == hdl)) {
memset(&wlc->modulecb[i], 0, sizeof(struct modulecb));
return 0;
}
}

/* table not found! */
return -ENODATA;
}

/* Write WME tunable parameters for retransmit/max rate from wlc struct to ucode */
static void brcms_c_wme_retries_write(struct brcms_c_info *wlc)
{
int ac;

/* Need clock to do this */
if (!wlc->clk)
return;

for (ac = 0; ac < AC_COUNT; ac++) {
brcms_c_write_shm(wlc, M_AC_TXLMT_ADDR(ac),
wlc->wme_retries[ac]);
}
}

#ifdef BCMDBG
static const char * const supr_reason[] = {
"None", "PMQ Entry", "Flush request",
"Previous frag failure", "Channel mismatch",
"Lifetime Expiry", "Underflow"
};

static void brcms_c_print_txs_status(u16 s)
{
printk(KERN_DEBUG "[15:12] %d frame attempts\n",
(s & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT);
printk(KERN_DEBUG " [11:8] %d rts attempts\n",
(s & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT);
printk(KERN_DEBUG " [7] %d PM mode indicated\n",
((s & TX_STATUS_PMINDCTD) ? 1 : 0));
printk(KERN_DEBUG " [6] %d intermediate status\n",
((s & TX_STATUS_INTERMEDIATE) ? 1 : 0));
printk(KERN_DEBUG " [5] %d AMPDU\n",
(s & TX_STATUS_AMPDU) ? 1 : 0);
printk(KERN_DEBUG " [4:2] %d Frame Suppressed Reason (%s)\n",
((s & TX_STATUS_SUPR_MASK) >> TX_STATUS_SUPR_SHIFT),
supr_reason[(s & TX_STATUS_SUPR_MASK) >> TX_STATUS_SUPR_SHIFT]);
printk(KERN_DEBUG " [1] %d acked\n",
((s & TX_STATUS_ACK_RCV) ? 1 : 0));
}
#endif /* BCMDBG */

void brcms_c_print_txstatus(struct tx_status *txs)
{
#if defined(BCMDBG)
u16 s = txs->status;
u16 ackphyrxsh = txs->ackphyrxsh;

printk(KERN_DEBUG "\ntxpkt (MPDU) Complete\n");

printk(KERN_DEBUG "FrameID: %04x ", txs->frameid);
printk(KERN_DEBUG "TxStatus: %04x", s);
printk(KERN_DEBUG "\n");

brcms_c_print_txs_status(s);

printk(KERN_DEBUG "LastTxTime: %04x ", txs->lasttxtime);
printk(KERN_DEBUG "Seq: %04x ", txs->sequence);
printk(KERN_DEBUG "PHYTxStatus: %04x ", txs->phyerr);
printk(KERN_DEBUG "RxAckRSSI: %04x ",
(ackphyrxsh & PRXS1_JSSI_MASK) >> PRXS1_JSSI_SHIFT);
printk(KERN_DEBUG "RxAckSQ: %04x",
(ackphyrxsh & PRXS1_SQ_MASK) >> PRXS1_SQ_SHIFT);
printk(KERN_DEBUG "\n");
#endif /* defined(BCMDBG) */
}

void brcms_c_statsupd(struct brcms_c_info *wlc)
{
int i;
struct macstat macstats;
#ifdef BCMDBG
u16 delta;
u16 rxf0ovfl;
u16 txfunfl[NFIFO];
#endif /* BCMDBG */

/* if driver down, make no sense to update stats */
if (!wlc->pub->up)
return;

#ifdef BCMDBG
/* save last rx fifo 0 overflow count */
rxf0ovfl = wlc->core->macstat_snapshot->rxf0ovfl;

/* save last tx fifo underflow count */
for (i = 0; i < NFIFO; i++)
txfunfl[i] = wlc->core->macstat_snapshot->txfunfl[i];
#endif /* BCMDBG */

/* Read mac stats from contiguous shared memory */
brcms_b_copyfrom_shm(wlc->hw, M_UCODE_MACSTAT,
&macstats, sizeof(struct macstat));

#ifdef BCMDBG
/* check for rx fifo 0 overflow */
delta = (u16) (wlc->core->macstat_snapshot->rxf0ovfl - rxf0ovfl);
if (delta)
wiphy_err(wlc->wiphy, "wl%d: %u rx fifo 0 overflows!\n",
wlc->pub->unit, delta);

/* check for tx fifo underflows */
for (i = 0; i < NFIFO; i++) {
delta =
(u16) (wlc->core->macstat_snapshot->txfunfl[i] -
txfunfl[i]);
if (delta)
wiphy_err(wlc->wiphy, "wl%d: %u tx fifo %d underflows!"
"\n", wlc->pub->unit, delta, i);
}
#endif /* BCMDBG */

/* merge counters from dma module */
for (i = 0; i < NFIFO; i++) {
if (wlc->hw->di[i]) {
dma_counterreset(wlc->hw->di[i]);
}
}
}

bool brcms_c_chipmatch(u16 vendor, u16 device)
{
if (vendor != PCI_VENDOR_ID_BROADCOM) {
pr_err("chipmatch: unknown vendor id %04x\n", vendor);
return false;
}

if (device == BCM43224_D11N_ID_VEN1)
return true;
if ((device == BCM43224_D11N_ID) || (device == BCM43225_D11N2G_ID))
return true;
if (device == BCM4313_D11N2G_ID)
return true;
if ((device == BCM43236_D11N_ID) || (device == BCM43236_D11N2G_ID))
return true;

pr_err("chipmatch: unknown device id %04x\n", device);
return false;
}

#if defined(BCMDBG)
void brcms_c_print_txdesc(struct d11txh *txh)
{
u16 mtcl = le16_to_cpu(txh->MacTxControlLow);
u16 mtch = le16_to_cpu(txh->MacTxControlHigh);
u16 mfc = le16_to_cpu(txh->MacFrameControl);
u16 tfest = le16_to_cpu(txh->TxFesTimeNormal);
u16 ptcw = le16_to_cpu(txh->PhyTxControlWord);
u16 ptcw_1 = le16_to_cpu(txh->PhyTxControlWord_1);
u16 ptcw_1_Fbr = le16_to_cpu(txh->PhyTxControlWord_1_Fbr);
u16 ptcw_1_Rts = le16_to_cpu(txh->PhyTxControlWord_1_Rts);
u16 ptcw_1_FbrRts = le16_to_cpu(txh->PhyTxControlWord_1_FbrRts);
u16 mainrates = le16_to_cpu(txh->MainRates);
u16 xtraft = le16_to_cpu(txh->XtraFrameTypes);
u8 *iv = txh->IV;
u8 *ra = txh->TxFrameRA;
u16 tfestfb = le16_to_cpu(txh->TxFesTimeFallback);
u8 *rtspfb = txh->RTSPLCPFallback;
u16 rtsdfb = le16_to_cpu(txh->RTSDurFallback);
u8 *fragpfb = txh->FragPLCPFallback;
u16 fragdfb = le16_to_cpu(txh->FragDurFallback);
u16 mmodelen = le16_to_cpu(txh->MModeLen);
u16 mmodefbrlen = le16_to_cpu(txh->MModeFbrLen);
u16 tfid = le16_to_cpu(txh->TxFrameID);
u16 txs = le16_to_cpu(txh->TxStatus);
u16 mnmpdu = le16_to_cpu(txh->MaxNMpdus);
u16 mabyte = le16_to_cpu(txh->MaxABytes_MRT);
u16 mabyte_f = le16_to_cpu(txh->MaxABytes_FBR);
u16 mmbyte = le16_to_cpu(txh->MinMBytes);

u8 *rtsph = txh->RTSPhyHeader;
struct ieee80211_rts rts = txh->rts_frame;
char hexbuf[256];

/* add plcp header along with txh descriptor */
printk(KERN_DEBUG "Raw TxDesc + plcp header:\n");
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
txh, sizeof(struct d11txh) + 48);

printk(KERN_DEBUG "TxCtlLow: %04x ", mtcl);
printk(KERN_DEBUG "TxCtlHigh: %04x ", mtch);
printk(KERN_DEBUG "FC: %04x ", mfc);
printk(KERN_DEBUG "FES Time: %04x\n", tfest);
printk(KERN_DEBUG "PhyCtl: %04x%s ", ptcw,
(ptcw & PHY_TXC_SHORT_HDR) ? " short" : "");
printk(KERN_DEBUG "PhyCtl_1: %04x ", ptcw_1);
printk(KERN_DEBUG "PhyCtl_1_Fbr: %04x\n", ptcw_1_Fbr);
printk(KERN_DEBUG "PhyCtl_1_Rts: %04x ", ptcw_1_Rts);
printk(KERN_DEBUG "PhyCtl_1_Fbr_Rts: %04x\n", ptcw_1_FbrRts);
printk(KERN_DEBUG "MainRates: %04x ", mainrates);
printk(KERN_DEBUG "XtraFrameTypes: %04x ", xtraft);
printk(KERN_DEBUG "\n");

brcmu_format_hex(hexbuf, iv, sizeof(txh->IV));
printk(KERN_DEBUG "SecIV: %s\n", hexbuf);
brcmu_format_hex(hexbuf, ra, sizeof(txh->TxFrameRA));
printk(KERN_DEBUG "RA: %s\n", hexbuf);

printk(KERN_DEBUG "Fb FES Time: %04x ", tfestfb);
brcmu_format_hex(hexbuf, rtspfb, sizeof(txh->RTSPLCPFallback));
printk(KERN_DEBUG "RTS PLCP: %s ", hexbuf);
printk(KERN_DEBUG "RTS DUR: %04x ", rtsdfb);
brcmu_format_hex(hexbuf, fragpfb, sizeof(txh->FragPLCPFallback));
printk(KERN_DEBUG "PLCP: %s ", hexbuf);
printk(KERN_DEBUG "DUR: %04x", fragdfb);
printk(KERN_DEBUG "\n");

printk(KERN_DEBUG "MModeLen: %04x ", mmodelen);
printk(KERN_DEBUG "MModeFbrLen: %04x\n", mmodefbrlen);

printk(KERN_DEBUG "FrameID: %04x\n", tfid);
printk(KERN_DEBUG "TxStatus: %04x\n", txs);

printk(KERN_DEBUG "MaxNumMpdu: %04x\n", mnmpdu);
printk(KERN_DEBUG "MaxAggbyte: %04x\n", mabyte);
printk(KERN_DEBUG "MaxAggbyte_fb: %04x\n", mabyte_f);
printk(KERN_DEBUG "MinByte: %04x\n", mmbyte);

brcmu_format_hex(hexbuf, rtsph, sizeof(txh->RTSPhyHeader));
printk(KERN_DEBUG "RTS PLCP: %s ", hexbuf);
brcmu_format_hex(hexbuf, (u8 *) &rts, sizeof(txh->rts_frame));
printk(KERN_DEBUG "RTS Frame: %s", hexbuf);
printk(KERN_DEBUG "\n");
}
#endif /* defined(BCMDBG) */

#if defined(BCMDBG)
void brcms_c_print_rxh(struct d11rxhdr *rxh)
{
u16 len = rxh->RxFrameSize;
u16 phystatus_0 = rxh->PhyRxStatus_0;
u16 phystatus_1 = rxh->PhyRxStatus_1;
u16 phystatus_2 = rxh->PhyRxStatus_2;
u16 phystatus_3 = rxh->PhyRxStatus_3;
u16 macstatus1 = rxh->RxStatus1;
u16 macstatus2 = rxh->RxStatus2;
char flagstr[64];
char lenbuf[20];
static const struct brcmu_bit_desc macstat_flags[] = {
{RXS_FCSERR, "FCSErr"},
{RXS_RESPFRAMETX, "Reply"},
{RXS_PBPRES, "PADDING"},
{RXS_DECATMPT, "DeCr"},
{RXS_DECERR, "DeCrErr"},
{RXS_BCNSENT, "Bcn"},
{0, NULL}
};

printk(KERN_DEBUG "Raw RxDesc:\n");
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, rxh,
sizeof(struct d11rxhdr));

brcmu_format_flags(macstat_flags, macstatus1, flagstr, 64);

snprintf(lenbuf, sizeof(lenbuf), "0x%x", len);

printk(KERN_DEBUG "RxFrameSize: %6s (%d)%s\n", lenbuf, len,
(rxh->PhyRxStatus_0 & PRXS0_SHORTH) ? " short preamble" : "");
printk(KERN_DEBUG "RxPHYStatus: %04x %04x %04x %04x\n",
phystatus_0, phystatus_1, phystatus_2, phystatus_3);
printk(KERN_DEBUG "RxMACStatus: %x %s\n", macstatus1, flagstr);
printk(KERN_DEBUG "RXMACaggtype: %x\n",
(macstatus2 & RXS_AGGTYPE_MASK));
printk(KERN_DEBUG "RxTSFTime: %04x\n", rxh->RxTSFTime);
}
#endif /* defined(BCMDBG) */

u16 brcms_b_rate_shm_offset(struct brcms_hardware *wlc_hw, u8 rate)
{
u16 table_ptr;
u8 phy_rate, index;

/* get the phy specific rate encoding for the PLCP SIGNAL field */
if (IS_OFDM(rate))
table_ptr = M_RT_DIRMAP_A;
else
table_ptr = M_RT_DIRMAP_B;

/* for a given rate, the LS-nibble of the PLCP SIGNAL field is
* the index into the rate table.
*/
phy_rate = rate_info[rate] & BRCMS_RATE_MASK;
index = phy_rate & 0xf;

/* Find the SHM pointer to the rate table entry by looking in the
* Direct-map Table
*/
return 2 * brcms_b_read_shm(wlc_hw, table_ptr + (index * 2));
}

static u16 brcms_c_rate_shm_offset(struct brcms_c_info *wlc, u8 rate)
{
return brcms_b_rate_shm_offset(wlc->hw, rate);
}

/* Callback for device removed */

/*
* Attempts to queue a packet onto a multiple-precedence queue,
* if necessary evicting a lower precedence packet from the queue.
*
* 'prec' is the precedence number that has already been mapped
* from the packet priority.
*
* Returns true if packet consumed (queued), false if not.
*/
bool
brcms_c_prec_enq(struct brcms_c_info *wlc, struct pktq *q, void *pkt, int prec)
{
return brcms_c_prec_enq_head(wlc, q, pkt, prec, false);
}

bool
brcms_c_prec_enq_head(struct brcms_c_info *wlc, struct pktq *q,
struct sk_buff *pkt, int prec, bool head)
{
struct sk_buff *p;
int eprec = -1; /* precedence to evict from */

/* Determine precedence from which to evict packet, if any */
if (pktq_pfull(q, prec))
eprec = prec;
else if (pktq_full(q)) {
p = brcmu_pktq_peek_tail(q, &eprec);
if (eprec > prec) {
wiphy_err(wlc->wiphy, "%s: Failing: eprec %d > prec %d"
"\n", __func__, eprec, prec);
return false;
}
}

/* Evict if needed */
if (eprec >= 0) {
bool discard_oldest;

discard_oldest = AC_BITMAP_TST(wlc->wme_dp, eprec);

/* Refuse newer packet unless configured to discard oldest */
if (eprec == prec && !discard_oldest) {
wiphy_err(wlc->wiphy, "%s: No where to go, prec == %d"
"\n", __func__, prec);
return false;
}

/* Evict packet according to discard policy */
p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) :
brcmu_pktq_pdeq_tail(q, eprec);
brcmu_pkt_buf_free_skb(p);
}

/* Enqueue */
if (head)
p = brcmu_pktq_penq_head(q, prec, pkt);
else
p = brcmu_pktq_penq(q, prec, pkt);

return true;
}

void brcms_c_txq_enq(void *ctx, struct scb *scb, struct sk_buff *sdu,
uint prec)
{
struct brcms_c_info *wlc = (struct brcms_c_info *) ctx;
struct brcms_txq_info *qi = wlc->pkt_queue; /* Check me */
struct pktq *q = &qi->q;
int prio;

prio = sdu->priority;

if (!brcms_c_prec_enq(wlc, q, sdu, prec)) {
if (!EDCF_ENAB(wlc->pub)
|| (wlc->pub->wlfeatureflag & WL_SWFL_FLOWCONTROL))
wiphy_err(wlc->wiphy, "wl%d: txq_enq: txq overflow"
"\n", wlc->pub->unit);

/*
* we might hit this condtion in case
* packet flooding from mac80211 stack
*/
brcmu_pkt_buf_free_skb(sdu);
}

/* Check if flow control needs to be turned on after enqueuing the packet
* Don't turn on flow control if EDCF is enabled. Driver would make the decision on what
* to drop instead of relying on stack to make the right decision
*/
if (!EDCF_ENAB(wlc->pub)
|| (wlc->pub->wlfeatureflag & WL_SWFL_FLOWCONTROL)) {
if (pktq_len(q) >= wlc->pub->tunables->datahiwat) {
brcms_c_txflowcontrol(wlc, qi, ON, ALLPRIO);
}
} else if (wlc->pub->_priofc) {
if (pktq_plen(q, wlc_prio2prec_map[prio]) >=
wlc->pub->tunables->datahiwat) {
brcms_c_txflowcontrol(wlc, qi, ON, prio);
}
}
}

bool
brcms_c_sendpkt_mac80211(struct brcms_c_info *wlc, struct sk_buff *sdu,
struct ieee80211_hw *hw)
{
u8 prio;
uint fifo;
void *pkt;
struct scb *scb = &global_scb;
struct ieee80211_hdr *d11_header = (struct ieee80211_hdr *)(sdu->data);

/* 802.11 standard requires management traffic to go at highest priority */
prio = ieee80211_is_data(d11_header->frame_control) ? sdu->priority :
MAXPRIO;
fifo = prio2fifo[prio];
pkt = sdu;
if (unlikely
(brcms_c_d11hdrs_mac80211(
wlc, hw, pkt, scb, 0, 1, fifo, 0, NULL, 0)))
return -EINVAL;
brcms_c_txq_enq(wlc, scb, pkt, BRCMS_PRIO_TO_PREC(prio));
brcms_c_send_q(wlc);
return 0;
}

void brcms_c_send_q(struct brcms_c_info *wlc)
{
struct sk_buff *pkt[DOT11_MAXNUMFRAGS];
int prec;
u16 prec_map;
int err = 0, i, count;
uint fifo;
struct brcms_txq_info *qi = wlc->pkt_queue;
struct pktq *q = &qi->q;
struct ieee80211_tx_info *tx_info;

if (in_send_q)
return;
else
in_send_q = true;

prec_map = wlc->tx_prec_map;

/* Send all the enq'd pkts that we can.
* Dequeue packets with precedence with empty HW fifo only
*/
while (prec_map && (pkt[0] = brcmu_pktq_mdeq(q, prec_map, &prec))) {
tx_info = IEEE80211_SKB_CB(pkt[0]);
if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
err = brcms_c_sendampdu(wlc->ampdu, qi, pkt, prec);
} else {
count = 1;
err = brcms_c_prep_pdu(wlc, pkt[0], &fifo);
if (!err) {
for (i = 0; i < count; i++) {
brcms_c_txfifo(wlc, fifo, pkt[i], true,
1);
}
}
}

if (err == -EBUSY) {
brcmu_pktq_penq_head(q, prec, pkt[0]);
/* If send failed due to any other reason than a change in
* HW FIFO condition, quit. Otherwise, read the new prec_map!
*/
if (prec_map == wlc->tx_prec_map)
break;
prec_map = wlc->tx_prec_map;
}
}

/* Check if flow control needs to be turned off after sending the packet */
if (!EDCF_ENAB(wlc->pub)
|| (wlc->pub->wlfeatureflag & WL_SWFL_FLOWCONTROL)) {
if (brcms_c_txflowcontrol_prio_isset(wlc, qi, ALLPRIO)
&& (pktq_len(q) < wlc->pub->tunables->datahiwat / 2)) {
brcms_c_txflowcontrol(wlc, qi, OFF, ALLPRIO);
}
} else if (wlc->pub->_priofc) {
int prio;
for (prio = MAXPRIO; prio >= 0; prio--) {
if (brcms_c_txflowcontrol_prio_isset(wlc, qi, prio) &&
(pktq_plen(q, wlc_prio2prec_map[prio]) <
wlc->pub->tunables->datahiwat / 2)) {
brcms_c_txflowcontrol(wlc, qi, OFF, prio);
}
}
}
in_send_q = false;
}

/*
* bcmc_fid_generate:
* Generate frame ID for a BCMC packet. The frag field is not used
* for MC frames so is used as part of the sequence number.
*/
static inline u16
bcmc_fid_generate(struct brcms_c_info *wlc, struct brcms_bss_cfg *bsscfg,
struct d11txh *txh)
{
u16 frameid;

frameid = le16_to_cpu(txh->TxFrameID) & ~(TXFID_SEQ_MASK |
TXFID_QUEUE_MASK);
frameid |=
(((wlc->
mc_fid_counter++) << TXFID_SEQ_SHIFT) & TXFID_SEQ_MASK) |
TX_BCMC_FIFO;

return frameid;
}

void
brcms_c_txfifo(struct brcms_c_info *wlc, uint fifo, struct sk_buff *p,
bool commit, s8 txpktpend)
{
u16 frameid = INVALIDFID;
struct d11txh *txh;

txh = (struct d11txh *) (p->data);

/* When a BC/MC frame is being committed to the BCMC fifo via DMA (NOT PIO), update
* ucode or BSS info as appropriate.
*/
if (fifo == TX_BCMC_FIFO) {
frameid = le16_to_cpu(txh->TxFrameID);

}

if (BRCMS_WAR16165(wlc))
brcms_c_war16165(wlc, true);

/* Bump up pending count for if not using rpc. If rpc is used, this will be handled
* in brcms_b_txfifo()
*/
if (commit) {
TXPKTPENDINC(wlc, fifo, txpktpend);
BCMMSG(wlc->wiphy, "pktpend inc %d to %d\n",
txpktpend, TXPKTPENDGET(wlc, fifo));
}

/* Commit BCMC sequence number in the SHM frame ID location */
if (frameid != INVALIDFID)
BCMCFID(wlc, frameid);

if (dma_txfast(wlc->hw->di[fifo], p, commit) < 0) {
wiphy_err(wlc->wiphy, "txfifo: fatal, toss frames !!!\n");
}
}

void
brcms_c_compute_plcp(struct brcms_c_info *wlc, u32 rspec,
uint length, u8 *plcp)
{
if (IS_MCS(rspec)) {
brcms_c_compute_mimo_plcp(rspec, length, plcp);
} else if (IS_OFDM(rspec)) {
brcms_c_compute_ofdm_plcp(rspec, length, plcp);
} else {
brcms_c_compute_cck_plcp(wlc, rspec, length, plcp);
}
return;
}

/* Rate: 802.11 rate code, length: PSDU length in octets */
static void brcms_c_compute_mimo_plcp(u32 rspec, uint length, u8 *plcp)
{
u8 mcs = (u8) (rspec & RSPEC_RATE_MASK);
plcp[0] = mcs;
if (RSPEC_IS40MHZ(rspec) || (mcs == 32))
plcp[0] |= MIMO_PLCP_40MHZ;
BRCMS_SET_MIMO_PLCP_LEN(plcp, length);
plcp[3] = RSPEC_MIMOPLCP3(rspec); /* rspec already holds this byte */
plcp[3] |= 0x7; /* set smoothing, not sounding ppdu & reserved */
plcp[4] = 0; /* number of extension spatial streams bit 0 & 1 */
plcp[5] = 0;
}

/* Rate: 802.11 rate code, length: PSDU length in octets */
static void
brcms_c_compute_ofdm_plcp(u32 rspec, u32 length, u8 *plcp)
{
u8 rate_signal;
u32 tmp = 0;
int rate = RSPEC2RATE(rspec);

/* encode rate per 802.11a-1999 sec 17.3.4.1, with lsb transmitted first */
rate_signal = rate_info[rate] & BRCMS_RATE_MASK;
memset(plcp, 0, D11_PHY_HDR_LEN);
D11A_PHY_HDR_SRATE((struct ofdm_phy_hdr *) plcp, rate_signal);

tmp = (length & 0xfff) << 5;
plcp[2] |= (tmp >> 16) & 0xff;
plcp[1] |= (tmp >> 8) & 0xff;
plcp[0] |= tmp & 0xff;

return;
}

/*
* Compute PLCP, but only requires actual rate and length of pkt.
* Rate is given in the driver standard multiple of 500 kbps.
* le is set for 11 Mbps rate if necessary.
* Broken out for PRQ.
*/

static void brcms_c_cck_plcp_set(struct brcms_c_info *wlc, int rate_500,
uint length, u8 *plcp)
{
u16 usec = 0;
u8 le = 0;

switch (rate_500) {
case BRCM_RATE_1M:
usec = length << 3;
break;
case BRCM_RATE_2M:
usec = length << 2;
break;
case BRCM_RATE_5M5:
usec = (length << 4) / 11;
if ((length << 4) - (usec * 11) > 0)
usec++;
break;
case BRCM_RATE_11M:
usec = (length << 3) / 11;
if ((length << 3) - (usec * 11) > 0) {
usec++;
if ((usec * 11) - (length << 3) >= 8)
le = D11B_PLCP_SIGNAL_LE;
}
break;

default:
wiphy_err(wlc->wiphy, "brcms_c_cck_plcp_set: unsupported rate %d"
"\n", rate_500);
rate_500 = BRCM_RATE_1M;
usec = length << 3;
break;
}
/* PLCP signal byte */
plcp[0] = rate_500 * 5; /* r (500kbps) * 5 == r (100kbps) */
/* PLCP service byte */
plcp[1] = (u8) (le | D11B_PLCP_SIGNAL_LOCKED);
/* PLCP length u16, little endian */
plcp[2] = usec & 0xff;
plcp[3] = (usec >> 8) & 0xff;
/* PLCP CRC16 */
plcp[4] = 0;
plcp[5] = 0;
}

/* Rate: 802.11 rate code, length: PSDU length in octets */
static void brcms_c_compute_cck_plcp(struct brcms_c_info *wlc, u32 rspec,
uint length, u8 *plcp)
{
int rate = RSPEC2RATE(rspec);

brcms_c_cck_plcp_set(wlc, rate, length, plcp);
}

/* brcms_c_compute_frame_dur()
*
* Calculate the 802.11 MAC header DUR field for MPDU
* DUR for a single frame = 1 SIFS + 1 ACK
* DUR for a frame with following frags = 3 SIFS + 2 ACK + next frag time
*
* rate MPDU rate in unit of 500kbps
* next_frag_len next MPDU length in bytes
* preamble_type use short/GF or long/MM PLCP header
*/
static u16
brcms_c_compute_frame_dur(struct brcms_c_info *wlc, u32 rate,
u8 preamble_type, uint next_frag_len)
{
u16 dur, sifs;

sifs = SIFS(wlc->band);

dur = sifs;
dur += (u16) brcms_c_calc_ack_time(wlc, rate, preamble_type);

if (next_frag_len) {
/* Double the current DUR to get 2 SIFS + 2 ACKs */
dur *= 2;
/* add another SIFS and the frag time */
dur += sifs;
dur +=
(u16) brcms_c_calc_frame_time(wlc, rate, preamble_type,
next_frag_len);
}
return dur;
}

/* brcms_c_compute_rtscts_dur()
*
* Calculate the 802.11 MAC header DUR field for an RTS or CTS frame
* DUR for normal RTS/CTS w/ frame = 3 SIFS + 1 CTS + next frame time + 1 ACK
* DUR for CTS-TO-SELF w/ frame = 2 SIFS + next frame time + 1 ACK
*
* cts cts-to-self or rts/cts
* rts_rate rts or cts rate in unit of 500kbps
* rate next MPDU rate in unit of 500kbps
* frame_len next MPDU frame length in bytes
*/
u16
brcms_c_compute_rtscts_dur(struct brcms_c_info *wlc, bool cts_only,
u32 rts_rate,
u32 frame_rate, u8 rts_preamble_type,
u8 frame_preamble_type, uint frame_len, bool ba)
{
u16 dur, sifs;

sifs = SIFS(wlc->band);

if (!cts_only) { /* RTS/CTS */
dur = 3 * sifs;
dur +=
(u16) brcms_c_calc_cts_time(wlc, rts_rate,
rts_preamble_type);
} else { /* CTS-TO-SELF */
dur = 2 * sifs;
}

dur +=
(u16) brcms_c_calc_frame_time(wlc, frame_rate, frame_preamble_type,
frame_len);
if (ba)
dur +=
(u16) brcms_c_calc_ba_time(wlc, frame_rate,
BRCMS_SHORT_PREAMBLE);
else
dur +=
(u16) brcms_c_calc_ack_time(wlc, frame_rate,
frame_preamble_type);
return dur;
}

u16 brcms_c_phytxctl1_calc(struct brcms_c_info *wlc, u32 rspec)
{
u16 phyctl1 = 0;
u16 bw;

if (BRCMS_ISLCNPHY(wlc->band)) {
bw = PHY_TXC1_BW_20MHZ;
} else {
bw = RSPEC_GET_BW(rspec);
/* 10Mhz is not supported yet */
if (bw < PHY_TXC1_BW_20MHZ) {
wiphy_err(wlc->wiphy, "phytxctl1_calc: bw %d is "
"not supported yet, set to 20L\n", bw);
bw = PHY_TXC1_BW_20MHZ;
}
}

if (IS_MCS(rspec)) {
uint mcs = rspec & RSPEC_RATE_MASK;

/* bw, stf, coding-type is part of RSPEC_PHYTXBYTE2 returns */
phyctl1 = RSPEC_PHYTXBYTE2(rspec);
/* set the upper byte of phyctl1 */
phyctl1 |= (mcs_table[mcs].tx_phy_ctl3 << 8);
} else if (IS_CCK(rspec) && !BRCMS_ISLCNPHY(wlc->band)
&& !BRCMS_ISSSLPNPHY(wlc->band)) {
/* In CCK mode LPPHY overloads OFDM Modulation bits with CCK Data Rate */
/* Eventually MIMOPHY would also be converted to this format */
/* 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps */
phyctl1 = (bw | (RSPEC_STF(rspec) << PHY_TXC1_MODE_SHIFT));
} else { /* legacy OFDM/CCK */
s16 phycfg;
/* get the phyctl byte from rate phycfg table */
phycfg = brcms_c_rate_legacy_phyctl(RSPEC2RATE(rspec));
if (phycfg == -1) {
wiphy_err(wlc->wiphy, "phytxctl1_calc: wrong "
"legacy OFDM/CCK rate\n");
phycfg = 0;
}
/* set the upper byte of phyctl1 */
phyctl1 =
(bw | (phycfg << 8) |
(RSPEC_STF(rspec) << PHY_TXC1_MODE_SHIFT));
}
return phyctl1;
}

u32
brcms_c_rspec_to_rts_rspec(struct brcms_c_info *wlc, u32 rspec,
bool use_rspec, u16 mimo_ctlchbw)
{
u32 rts_rspec = 0;

if (use_rspec) {
/* use frame rate as rts rate */
rts_rspec = rspec;

} else if (wlc->band->gmode && wlc->protection->_g && !IS_CCK(rspec)) {
/* Use 11Mbps as the g protection RTS target rate and fallback.
* Use the BRCMS_BASIC_RATE() lookup to find the best basic rate
* under the target in case 11 Mbps is not Basic.
* 6 and 9 Mbps are not usually selected by rate selection, but even
* if the OFDM rate we are protecting is 6 or 9 Mbps, 11 is more robust.
*/
rts_rspec = BRCMS_BASIC_RATE(wlc, BRCM_RATE_11M);
} else {
/* calculate RTS rate and fallback rate based on the frame rate
* RTS must be sent at a basic rate since it is a
* control frame, sec 9.6 of 802.11 spec
*/
rts_rspec = BRCMS_BASIC_RATE(wlc, rspec);
}

if (BRCMS_PHY_11N_CAP(wlc->band)) {
/* set rts txbw to correct side band */
rts_rspec &= ~RSPEC_BW_MASK;

/* if rspec/rspec_fallback is 40MHz, then send RTS on both 20MHz channel
* (DUP), otherwise send RTS on control channel
*/
if (RSPEC_IS40MHZ(rspec) && !IS_CCK(rts_rspec))
rts_rspec |= (PHY_TXC1_BW_40MHZ_DUP << RSPEC_BW_SHIFT);
else
rts_rspec |= (mimo_ctlchbw << RSPEC_BW_SHIFT);

/* pick siso/cdd as default for ofdm */
if (IS_OFDM(rts_rspec)) {
rts_rspec &= ~RSPEC_STF_MASK;
rts_rspec |= (wlc->stf->ss_opmode << RSPEC_STF_SHIFT);
}
}
return rts_rspec;
}

/*
* Add struct d11txh, struct cck_phy_hdr.
*
* 'p' data must start with 802.11 MAC header
* 'p' must allow enough bytes of local headers to be "pushed" onto the packet
*
* headroom == D11_PHY_HDR_LEN + D11_TXH_LEN (D11_TXH_LEN is now 104 bytes)
*
*/
static u16
brcms_c_d11hdrs_mac80211(struct brcms_c_info *wlc, struct ieee80211_hw *hw,
struct sk_buff *p, struct scb *scb, uint frag,
uint nfrags, uint queue, uint next_frag_len,
struct wsec_key *key, u32 rspec_override)
{
struct ieee80211_hdr *h;
struct d11txh *txh;
u8 *plcp, plcp_fallback[D11_PHY_HDR_LEN];
int len, phylen, rts_phylen;
u16 mch, phyctl, xfts, mainrates;
u16 seq = 0, mcl = 0, status = 0, frameid = 0;
u32 rspec[2] = { BRCM_RATE_1M, BRCM_RATE_1M }, rts_rspec[2] = {
BRCM_RATE_1M, BRCM_RATE_1M};
bool use_rts = false;
bool use_cts = false;
bool use_rifs = false;
bool short_preamble[2] = { false, false };
u8 preamble_type[2] = { BRCMS_LONG_PREAMBLE, BRCMS_LONG_PREAMBLE };
u8 rts_preamble_type[2] = { BRCMS_LONG_PREAMBLE, BRCMS_LONG_PREAMBLE };
u8 *rts_plcp, rts_plcp_fallback[D11_PHY_HDR_LEN];
struct ieee80211_rts *rts = NULL;
bool qos;
uint ac;
u32 rate_val[2];
bool hwtkmic = false;
u16 mimo_ctlchbw = PHY_TXC1_BW_20MHZ;
#define ANTCFG_NONE 0xFF
u8 antcfg = ANTCFG_NONE;
u8 fbantcfg = ANTCFG_NONE;
uint phyctl1_stf = 0;
u16 durid = 0;
struct ieee80211_tx_rate *txrate[2];
int k;
struct ieee80211_tx_info *tx_info;
bool is_mcs[2];
u16 mimo_txbw;
u8 mimo_preamble_type;

/* locate 802.11 MAC header */
h = (struct ieee80211_hdr *)(p->data);
qos = ieee80211_is_data_qos(h->frame_control);

/* compute length of frame in bytes for use in PLCP computations */
len = brcmu_pkttotlen(p);
phylen = len + FCS_LEN;

/* If WEP enabled, add room in phylen for the additional bytes of
* ICV which MAC generates. We do NOT add the additional bytes to
* the packet itself, thus phylen = packet length + ICV_LEN + FCS_LEN
* in this case
*/
if (key) {
phylen += key->icv_len;
}

/* Get tx_info */
tx_info = IEEE80211_SKB_CB(p);

/* add PLCP */
plcp = skb_push(p, D11_PHY_HDR_LEN);

/* add Broadcom tx descriptor header */
txh = (struct d11txh *) skb_push(p, D11_TXH_LEN);
memset(txh, 0, D11_TXH_LEN);

/* setup frameid */
if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
/* non-AP STA should never use BCMC queue */
if (queue == TX_BCMC_FIFO) {
wiphy_err(wlc->wiphy, "wl%d: %s: ASSERT queue == "
"TX_BCMC!\n", BRCMS_UNIT(wlc), __func__);
frameid = bcmc_fid_generate(wlc, NULL, txh);
} else {
/* Increment the counter for first fragment */
if (tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) {
SCB_SEQNUM(scb, p->priority)++;
}

/* extract fragment number from frame first */
seq = le16_to_cpu(seq) & FRAGNUM_MASK;
seq |= (SCB_SEQNUM(scb, p->priority) << SEQNUM_SHIFT);
h->seq_ctrl = cpu_to_le16(seq);

frameid = ((seq << TXFID_SEQ_SHIFT) & TXFID_SEQ_MASK) |
(queue & TXFID_QUEUE_MASK);
}
}
frameid |= queue & TXFID_QUEUE_MASK;

/* set the ignpmq bit for all pkts tx'd in PS mode and for beacons */
if (SCB_PS(scb) || ieee80211_is_beacon(h->frame_control))
mcl |= TXC_IGNOREPMQ;

txrate[0] = tx_info->control.rates;
txrate[1] = txrate[0] + 1;

/* if rate control algorithm didn't give us a fallback rate, use the primary rate */
if (txrate[1]->idx < 0) {
txrate[1] = txrate[0];
}

for (k = 0; k < hw->max_rates; k++) {
is_mcs[k] =
txrate[k]->flags & IEEE80211_TX_RC_MCS ? true : false;
if (!is_mcs[k]) {
if ((txrate[k]->idx >= 0)
&& (txrate[k]->idx <
hw->wiphy->bands[tx_info->band]->n_bitrates)) {
rate_val[k] =
hw->wiphy->bands[tx_info->band]->
bitrates[txrate[k]->idx].hw_value;
short_preamble[k] =
txrate[k]->
flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE ?
true : false;
} else {
rate_val[k] = BRCM_RATE_1M;
}
} else {
rate_val[k] = txrate[k]->idx;
}
/* Currently only support same setting for primay and fallback rates.
* Unify flags for each rate into a single value for the frame
*/
use_rts |=
txrate[k]->
flags & IEEE80211_TX_RC_USE_RTS_CTS ? true : false;
use_cts |=
txrate[k]->
flags & IEEE80211_TX_RC_USE_CTS_PROTECT ? true : false;

if (is_mcs[k])
rate_val[k] |= NRATE_MCS_INUSE;

rspec[k] = mac80211_wlc_set_nrate(wlc, wlc->band, rate_val[k]);

/* (1) RATE: determine and validate primary rate and fallback rates */
if (!RSPEC_ACTIVE(rspec[k])) {
rspec[k] = BRCM_RATE_1M;
} else {
if (!is_multicast_ether_addr(h->addr1)) {
/* set tx antenna config */
brcms_c_antsel_antcfg_get(wlc->asi, false,
false, 0, 0, &antcfg, &fbantcfg);
}
}
}

phyctl1_stf = wlc->stf->ss_opmode;

if (N_ENAB(wlc->pub)) {
for (k = 0; k < hw->max_rates; k++) {
/* apply siso/cdd to single stream mcs's or ofdm if rspec is auto selected */
if (((IS_MCS(rspec[k]) &&
IS_SINGLE_STREAM(rspec[k] & RSPEC_RATE_MASK)) ||
IS_OFDM(rspec[k]))
&& ((rspec[k] & RSPEC_OVERRIDE_MCS_ONLY)
|| !(rspec[k] & RSPEC_OVERRIDE))) {
rspec[k] &= ~(RSPEC_STF_MASK | RSPEC_STC_MASK);

/* For SISO MCS use STBC if possible */
if (IS_MCS(rspec[k])
&& BRCMS_STF_SS_STBC_TX(wlc, scb)) {
u8 stc;

stc = 1; /* Nss for single stream is always 1 */
rspec[k] |=
(PHY_TXC1_MODE_STBC <<
RSPEC_STF_SHIFT) | (stc <<
RSPEC_STC_SHIFT);
} else
rspec[k] |=
(phyctl1_stf << RSPEC_STF_SHIFT);
}

/* Is the phy configured to use 40MHZ frames? If so then pick the desired txbw */
if (CHSPEC_WLC_BW(wlc->chanspec) == BRCMS_40_MHZ) {
/* default txbw is 20in40 SB */
mimo_ctlchbw = mimo_txbw =
CHSPEC_SB_UPPER(BRCMS_BAND_PI_RADIO_CHANSPEC)
? PHY_TXC1_BW_20MHZ_UP : PHY_TXC1_BW_20MHZ;

if (IS_MCS(rspec[k])) {
/* mcs 32 must be 40b/w DUP */
if ((rspec[k] & RSPEC_RATE_MASK) == 32) {
mimo_txbw =
PHY_TXC1_BW_40MHZ_DUP;
/* use override */
} else if (wlc->mimo_40txbw != AUTO)
mimo_txbw = wlc->mimo_40txbw;
/* else check if dst is using 40 Mhz */
else if (scb->flags & SCB_IS40)
mimo_txbw = PHY_TXC1_BW_40MHZ;
} else if (IS_OFDM(rspec[k])) {
if (wlc->ofdm_40txbw != AUTO)
mimo_txbw = wlc->ofdm_40txbw;
} else {
if (wlc->cck_40txbw != AUTO)
mimo_txbw = wlc->cck_40txbw;
}
} else {
/* mcs32 is 40 b/w only.
* This is possible for probe packets on a STA during SCAN
*/
if ((rspec[k] & RSPEC_RATE_MASK) == 32) {
/* mcs 0 */
rspec[k] = RSPEC_MIMORATE;
}
mimo_txbw = PHY_TXC1_BW_20MHZ;
}

/* Set channel width */
rspec[k] &= ~RSPEC_BW_MASK;
if ((k == 0) || ((k > 0) && IS_MCS(rspec[k])))
rspec[k] |= (mimo_txbw << RSPEC_BW_SHIFT);
else
rspec[k] |= (mimo_ctlchbw << RSPEC_BW_SHIFT);

/* Set Short GI */
#ifdef NOSGIYET
if (IS_MCS(rspec[k])
&& (txrate[k]->flags & IEEE80211_TX_RC_SHORT_GI))
rspec[k] |= RSPEC_SHORT_GI;
else if (!(txrate[k]->flags & IEEE80211_TX_RC_SHORT_GI))
rspec[k] &= ~RSPEC_SHORT_GI;
#else
rspec[k] &= ~RSPEC_SHORT_GI;
#endif

mimo_preamble_type = BRCMS_MM_PREAMBLE;
if (txrate[k]->flags & IEEE80211_TX_RC_GREEN_FIELD)
mimo_preamble_type = BRCMS_GF_PREAMBLE;

if ((txrate[k]->flags & IEEE80211_TX_RC_MCS)
&& (!IS_MCS(rspec[k]))) {
wiphy_err(wlc->wiphy, "wl%d: %s: IEEE80211_TX_"
"RC_MCS != IS_MCS(rspec)\n",
BRCMS_UNIT(wlc), __func__);
}

if (IS_MCS(rspec[k])) {
preamble_type[k] = mimo_preamble_type;

/* if SGI is selected, then forced mm for single stream */
if ((rspec[k] & RSPEC_SHORT_GI)
&& IS_SINGLE_STREAM(rspec[k] &
RSPEC_RATE_MASK)) {
preamble_type[k] = BRCMS_MM_PREAMBLE;
}
}

/* should be better conditionalized */
if (!IS_MCS(rspec[0])
&& (tx_info->control.rates[0].
flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE))
preamble_type[k] = BRCMS_SHORT_PREAMBLE;
}
} else {
for (k = 0; k < hw->max_rates; k++) {
/* Set ctrlchbw as 20Mhz */
rspec[k] &= ~RSPEC_BW_MASK;
rspec[k] |= (PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT);

/* for nphy, stf of ofdm frames must follow policies */
if (BRCMS_ISNPHY(wlc->band) && IS_OFDM(rspec[k])) {
rspec[k] &= ~RSPEC_STF_MASK;
rspec[k] |= phyctl1_stf << RSPEC_STF_SHIFT;
}
}
}

/* Reset these for use with AMPDU's */
txrate[0]->count = 0;
txrate[1]->count = 0;

/* (2) PROTECTION, may change rspec */
if ((ieee80211_is_data(h->frame_control) ||
ieee80211_is_mgmt(h->frame_control)) &&
(phylen > wlc->RTSThresh) && !is_multicast_ether_addr(h->addr1))
use_rts = true;

/* (3) PLCP: determine PLCP header and MAC duration,
* fill struct d11txh */
brcms_c_compute_plcp(wlc, rspec[0], phylen, plcp);
brcms_c_compute_plcp(wlc, rspec[1], phylen, plcp_fallback);
memcpy(&txh->FragPLCPFallback,
plcp_fallback, sizeof(txh->FragPLCPFallback));

/* Length field now put in CCK FBR CRC field */
if (IS_CCK(rspec[1])) {
txh->FragPLCPFallback[4] = phylen & 0xff;
txh->FragPLCPFallback[5] = (phylen & 0xff00) >> 8;
}

/* MIMO-RATE: need validation ?? */
mainrates = IS_OFDM(rspec[0]) ?
D11A_PHY_HDR_GRATE((struct ofdm_phy_hdr *) plcp) :
plcp[0];

/* DUR field for main rate */
if (!ieee80211_is_pspoll(h->frame_control) &&
!is_multicast_ether_addr(h->addr1) && !use_rifs) {
durid =
brcms_c_compute_frame_dur(wlc, rspec[0], preamble_type[0],
next_frag_len);
h->duration_id = cpu_to_le16(durid);
} else if (use_rifs) {
/* NAV protect to end of next max packet size */
durid =
(u16) brcms_c_calc_frame_time(wlc, rspec[0],
preamble_type[0],
DOT11_MAX_FRAG_LEN);
durid += RIFS_11N_TIME;
h->duration_id = cpu_to_le16(durid);
}

/* DUR field for fallback rate */
if (ieee80211_is_pspoll(h->frame_control))
txh->FragDurFallback = h->duration_id;
else if (is_multicast_ether_addr(h->addr1) || use_rifs)
txh->FragDurFallback = 0;
else {
durid = brcms_c_compute_frame_dur(wlc, rspec[1],
preamble_type[1], next_frag_len);
txh->FragDurFallback = cpu_to_le16(durid);
}

/* (4) MAC-HDR: MacTxControlLow */
if (frag == 0)
mcl |= TXC_STARTMSDU;

if (!is_multicast_ether_addr(h->addr1))
mcl |= TXC_IMMEDACK;

if (BAND_5G(wlc->band->bandtype))
mcl |= TXC_FREQBAND_5G;

if (CHSPEC_IS40(BRCMS_BAND_PI_RADIO_CHANSPEC))
mcl |= TXC_BW_40;

/* set AMIC bit if using hardware TKIP MIC */
if (hwtkmic)
mcl |= TXC_AMIC;

txh->MacTxControlLow = cpu_to_le16(mcl);

/* MacTxControlHigh */
mch = 0;

/* Set fallback rate preamble type */
if ((preamble_type[1] == BRCMS_SHORT_PREAMBLE) ||
(preamble_type[1] == BRCMS_GF_PREAMBLE)) {
if (RSPEC2RATE(rspec[1]) != BRCM_RATE_1M)
mch |= TXC_PREAMBLE_DATA_FB_SHORT;
}

/* MacFrameControl */
memcpy(&txh->MacFrameControl, &h->frame_control, sizeof(u16));
txh->TxFesTimeNormal = cpu_to_le16(0);

txh->TxFesTimeFallback = cpu_to_le16(0);

/* TxFrameRA */
memcpy(&txh->TxFrameRA, &h->addr1, ETH_ALEN);

/* TxFrameID */
txh->TxFrameID = cpu_to_le16(frameid);

/* TxStatus, Note the case of recreating the first frag of a suppressed frame
* then we may need to reset the retry cnt's via the status reg
*/
txh->TxStatus = cpu_to_le16(status);

/* extra fields for ucode AMPDU aggregation, the new fields are added to
* the END of previous structure so that it's compatible in driver.
*/
txh->MaxNMpdus = cpu_to_le16(0);
txh->MaxABytes_MRT = cpu_to_le16(0);
txh->MaxABytes_FBR = cpu_to_le16(0);
txh->MinMBytes = cpu_to_le16(0);

/* (5) RTS/CTS: determine RTS/CTS PLCP header and MAC duration,
* furnish struct d11txh */
/* RTS PLCP header and RTS frame */
if (use_rts || use_cts) {
if (use_rts && use_cts)
use_cts = false;

for (k = 0; k < 2; k++) {
rts_rspec[k] = brcms_c_rspec_to_rts_rspec(wlc, rspec[k],
false,
mimo_ctlchbw);
}

if (!IS_OFDM(rts_rspec[0]) &&
!((RSPEC2RATE(rts_rspec[0]) == BRCM_RATE_1M) ||
(wlc->PLCPHdr_override == BRCMS_PLCP_LONG))) {
rts_preamble_type[0] = BRCMS_SHORT_PREAMBLE;
mch |= TXC_PREAMBLE_RTS_MAIN_SHORT;
}

if (!IS_OFDM(rts_rspec[1]) &&
!((RSPEC2RATE(rts_rspec[1]) == BRCM_RATE_1M) ||
(wlc->PLCPHdr_override == BRCMS_PLCP_LONG))) {
rts_preamble_type[1] = BRCMS_SHORT_PREAMBLE;
mch |= TXC_PREAMBLE_RTS_FB_SHORT;
}

/* RTS/CTS additions to MacTxControlLow */
if (use_cts) {
txh->MacTxControlLow |= cpu_to_le16(TXC_SENDCTS);
} else {
txh->MacTxControlLow |= cpu_to_le16(TXC_SENDRTS);
txh->MacTxControlLow |= cpu_to_le16(TXC_LONGFRAME);
}

/* RTS PLCP header */
rts_plcp = txh->RTSPhyHeader;
if (use_cts)
rts_phylen = DOT11_CTS_LEN + FCS_LEN;
else
rts_phylen = DOT11_RTS_LEN + FCS_LEN;

brcms_c_compute_plcp(wlc, rts_rspec[0], rts_phylen, rts_plcp);

/* fallback rate version of RTS PLCP header */
brcms_c_compute_plcp(wlc, rts_rspec[1], rts_phylen,
rts_plcp_fallback);
memcpy(&txh->RTSPLCPFallback, rts_plcp_fallback,
sizeof(txh->RTSPLCPFallback));

/* RTS frame fields... */
rts = (struct ieee80211_rts *)&txh->rts_frame;

durid = brcms_c_compute_rtscts_dur(wlc, use_cts, rts_rspec[0],
rspec[0], rts_preamble_type[0],
preamble_type[0], phylen, false);
rts->duration = cpu_to_le16(durid);
/* fallback rate version of RTS DUR field */
durid = brcms_c_compute_rtscts_dur(wlc, use_cts,
rts_rspec[1], rspec[1],
rts_preamble_type[1],
preamble_type[1], phylen, false);
txh->RTSDurFallback = cpu_to_le16(durid);

if (use_cts) {
rts->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
IEEE80211_STYPE_CTS);

memcpy(&rts->ra, &h->addr2, ETH_ALEN);
} else {
rts->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
IEEE80211_STYPE_RTS);

memcpy(&rts->ra, &h->addr1, 2 * ETH_ALEN);
}

/* mainrate
* low 8 bits: main frag rate/mcs,
* high 8 bits: rts/cts rate/mcs
*/
mainrates |= (IS_OFDM(rts_rspec[0]) ?
D11A_PHY_HDR_GRATE(
(struct ofdm_phy_hdr *) rts_plcp) :
rts_plcp[0]) << 8;
} else {
memset((char *)txh->RTSPhyHeader, 0, D11_PHY_HDR_LEN);
memset((char *)&txh->rts_frame, 0,
sizeof(struct ieee80211_rts));
memset((char *)txh->RTSPLCPFallback, 0,
sizeof(txh->RTSPLCPFallback));
txh->RTSDurFallback = 0;
}

#ifdef SUPPORT_40MHZ
/* add null delimiter count */
if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && IS_MCS(rspec)) {
txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM] =
brcm_c_ampdu_null_delim_cnt(wlc->ampdu, scb, rspec, phylen);
}
#endif

/* Now that RTS/RTS FB preamble types are updated, write the final value */
txh->MacTxControlHigh = cpu_to_le16(mch);

/* MainRates (both the rts and frag plcp rates have been calculated now) */
txh->MainRates = cpu_to_le16(mainrates);

/* XtraFrameTypes */
xfts = FRAMETYPE(rspec[1], wlc->mimoft);
xfts |= (FRAMETYPE(rts_rspec[0], wlc->mimoft) << XFTS_RTS_FT_SHIFT);
xfts |= (FRAMETYPE(rts_rspec[1], wlc->mimoft) << XFTS_FBRRTS_FT_SHIFT);
xfts |=
CHSPEC_CHANNEL(BRCMS_BAND_PI_RADIO_CHANSPEC) << XFTS_CHANNEL_SHIFT;
txh->XtraFrameTypes = cpu_to_le16(xfts);

/* PhyTxControlWord */
phyctl = FRAMETYPE(rspec[0], wlc->mimoft);
if ((preamble_type[0] == BRCMS_SHORT_PREAMBLE) ||
(preamble_type[0] == BRCMS_GF_PREAMBLE)) {
if (RSPEC2RATE(rspec[0]) != BRCM_RATE_1M)
phyctl |= PHY_TXC_SHORT_HDR;
}

/* phytxant is properly bit shifted */
phyctl |= brcms_c_stf_d11hdrs_phyctl_txant(wlc, rspec[0]);
txh->PhyTxControlWord = cpu_to_le16(phyctl);

/* PhyTxControlWord_1 */
if (BRCMS_PHY_11N_CAP(wlc->band)) {
u16 phyctl1 = 0;

phyctl1 = brcms_c_phytxctl1_calc(wlc, rspec[0]);
txh->PhyTxControlWord_1 = cpu_to_le16(phyctl1);
phyctl1 = brcms_c_phytxctl1_calc(wlc, rspec[1]);
txh->PhyTxControlWord_1_Fbr = cpu_to_le16(phyctl1);

if (use_rts || use_cts) {
phyctl1 = brcms_c_phytxctl1_calc(wlc, rts_rspec[0]);
txh->PhyTxControlWord_1_Rts = cpu_to_le16(phyctl1);
phyctl1 = brcms_c_phytxctl1_calc(wlc, rts_rspec[1]);
txh->PhyTxControlWord_1_FbrRts = cpu_to_le16(phyctl1);
}

/*
* For mcs frames, if mixedmode(overloaded with long preamble) is going to be set,
* fill in non-zero MModeLen and/or MModeFbrLen
* it will be unnecessary if they are separated
*/
if (IS_MCS(rspec[0]) &&
(preamble_type[0] == BRCMS_MM_PREAMBLE)) {
u16 mmodelen =
brcms_c_calc_lsig_len(wlc, rspec[0], phylen);
txh->MModeLen = cpu_to_le16(mmodelen);
}

if (IS_MCS(rspec[1]) &&
(preamble_type[1] == BRCMS_MM_PREAMBLE)) {
u16 mmodefbrlen =
brcms_c_calc_lsig_len(wlc, rspec[1], phylen);
txh->MModeFbrLen = cpu_to_le16(mmodefbrlen);
}
}

ac = skb_get_queue_mapping(p);
if (SCB_WME(scb) && qos && wlc->edcf_txop[ac]) {
uint frag_dur, dur, dur_fallback;

/* WME: Update TXOP threshold */
if ((!(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) && (frag == 0)) {
frag_dur =
brcms_c_calc_frame_time(wlc, rspec[0],
preamble_type[0], phylen);

if (rts) {
/* 1 RTS or CTS-to-self frame */
dur =
brcms_c_calc_cts_time(wlc, rts_rspec[0],
rts_preamble_type[0]);
dur_fallback =
brcms_c_calc_cts_time(wlc, rts_rspec[1],
rts_preamble_type[1]);
/* (SIFS + CTS) + SIFS + frame + SIFS + ACK */
dur += le16_to_cpu(rts->duration);
dur_fallback +=
le16_to_cpu(txh->RTSDurFallback);
} else if (use_rifs) {
dur = frag_dur;
dur_fallback = 0;
} else {
/* frame + SIFS + ACK */
dur = frag_dur;
dur +=
brcms_c_compute_frame_dur(wlc, rspec[0],
preamble_type[0], 0);

dur_fallback =
brcms_c_calc_frame_time(wlc, rspec[1],
preamble_type[1],
phylen);
dur_fallback +=
brcms_c_compute_frame_dur(wlc, rspec[1],
preamble_type[1], 0);
}
/* NEED to set TxFesTimeNormal (hard) */
txh->TxFesTimeNormal = cpu_to_le16((u16) dur);
/* NEED to set fallback rate version of TxFesTimeNormal (hard) */
txh->TxFesTimeFallback =
cpu_to_le16((u16) dur_fallback);

/* update txop byte threshold (txop minus intraframe overhead) */
if (wlc->edcf_txop[ac] >= (dur - frag_dur)) {
{
uint newfragthresh;

newfragthresh =
brcms_c_calc_frame_len(wlc,
rspec[0], preamble_type[0],
(wlc->edcf_txop[ac] -
(dur - frag_dur)));
/* range bound the fragthreshold */
if (newfragthresh < DOT11_MIN_FRAG_LEN)
newfragthresh =
DOT11_MIN_FRAG_LEN;
else if (newfragthresh >
wlc->usr_fragthresh)
newfragthresh =
wlc->usr_fragthresh;
/* update the fragthresh and do txc update */
if (wlc->fragthresh[queue] !=
(u16) newfragthresh) {
wlc->fragthresh[queue] =
(u16) newfragthresh;
}
}
} else
wiphy_err(wlc->wiphy, "wl%d: %s txop invalid "
"for rate %d\n",
wlc->pub->unit, fifo_names[queue],
RSPEC2RATE(rspec[0]));

if (dur > wlc->edcf_txop[ac])
wiphy_err(wlc->wiphy, "wl%d: %s: %s txop "
"exceeded phylen %d/%d dur %d/%d\n",
wlc->pub->unit, __func__,
fifo_names[queue],
phylen, wlc->fragthresh[queue],
dur, wlc->edcf_txop[ac]);
}
}

return 0;
}

void brcms_c_tbtt(struct brcms_c_info *wlc)
{
struct brcms_bss_cfg *cfg = wlc->cfg;

if (!cfg->BSS) {
/* DirFrmQ is now valid...defer setting until end of ATIM window */
wlc->qvalid |= MCMD_DIRFRMQVAL;
}
}

static void brcms_c_war16165(struct brcms_c_info *wlc, bool tx)
{
if (tx) {
/* the post-increment is used in STAY_AWAKE macro */
if (wlc->txpend16165war++ == 0)
brcms_c_set_ps_ctrl(wlc);
} else {
wlc->txpend16165war--;
if (wlc->txpend16165war == 0)
brcms_c_set_ps_ctrl(wlc);
}
}

/* process an individual struct tx_status */
bool
brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs, u32 frm_tx2)
{
struct sk_buff *p;
uint queue;
struct d11txh *txh;
struct scb *scb = NULL;
bool free_pdu;
int tx_rts, tx_frame_count, tx_rts_count;
uint totlen, supr_status;
bool lastframe;
struct ieee80211_hdr *h;
u16 mcl;
struct ieee80211_tx_info *tx_info;
struct ieee80211_tx_rate *txrate;
int i;

(void)(frm_tx2); /* Compiler reference to avoid unused variable warning */

/* discard intermediate indications for ucode with one legitimate case:
* e.g. if "useRTS" is set. ucode did a successful rts/cts exchange, but the subsequent
* tx of DATA failed. so it will start rts/cts from the beginning (resetting the rts
* transmission count)
*/
if (!(txs->status & TX_STATUS_AMPDU)
&& (txs->status & TX_STATUS_INTERMEDIATE)) {
wiphy_err(wlc->wiphy, "%s: INTERMEDIATE but not AMPDU\n",
__func__);
return false;
}

queue = txs->frameid & TXFID_QUEUE_MASK;
if (queue >= NFIFO) {
p = NULL;
goto fatal;
}

p = GETNEXTTXP(wlc, queue);
if (BRCMS_WAR16165(wlc))
brcms_c_war16165(wlc, false);
if (p == NULL)
goto fatal;

txh = (struct d11txh *) (p->data);
mcl = le16_to_cpu(txh->MacTxControlLow);

if (txs->phyerr) {
if (WL_ERROR_ON()) {
wiphy_err(wlc->wiphy, "phyerr 0x%x, rate 0x%x\n",
txs->phyerr, txh->MainRates);
brcms_c_print_txdesc(txh);
}
brcms_c_print_txstatus(txs);
}

if (txs->frameid != cpu_to_le16(txh->TxFrameID))
goto fatal;
tx_info = IEEE80211_SKB_CB(p);
h = (struct ieee80211_hdr *)((u8 *) (txh + 1) + D11_PHY_HDR_LEN);

if (tx_info->control.sta)
scb = (struct scb *)tx_info->control.sta->drv_priv;

if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
brcms_c_ampdu_dotxstatus(wlc->ampdu, scb, p, txs);
return false;
}

supr_status = txs->status & TX_STATUS_SUPR_MASK;
if (supr_status == TX_STATUS_SUPR_BADCH)
BCMMSG(wlc->wiphy,
"%s: Pkt tx suppressed, possibly channel %d\n",
__func__, CHSPEC_CHANNEL(wlc->default_bss->chanspec));

tx_rts = cpu_to_le16(txh->MacTxControlLow) & TXC_SENDRTS;
tx_frame_count =
(txs->status & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT;
tx_rts_count =
(txs->status & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT;

lastframe = !ieee80211_has_morefrags(h->frame_control);

if (!lastframe) {
wiphy_err(wlc->wiphy, "Not last frame!\n");
} else {
/*
* Set information to be consumed by Minstrel ht.
*
* The "fallback limit" is the number of tx attempts a given
* MPDU is sent at the "primary" rate. Tx attempts beyond that
* limit are sent at the "secondary" rate.
* A 'short frame' does not exceed RTS treshold.
*/
u16 sfbl, /* Short Frame Rate Fallback Limit */
lfbl, /* Long Frame Rate Fallback Limit */
fbl;

if (queue < AC_COUNT) {
sfbl = BRCMS_WME_RETRY_SFB_GET(wlc, wme_fifo2ac[queue]);
lfbl = BRCMS_WME_RETRY_LFB_GET(wlc, wme_fifo2ac[queue]);
} else {
sfbl = wlc->SFBL;
lfbl = wlc->LFBL;
}

txrate = tx_info->status.rates;
if (txrate[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
fbl = lfbl;
else
fbl = sfbl;

ieee80211_tx_info_clear_status(tx_info);

if ((tx_frame_count > fbl) && (txrate[1].idx >= 0)) {
/* rate selection requested a fallback rate and we used it */
txrate[0].count = fbl;
txrate[1].count = tx_frame_count - fbl;
} else {
/* rate selection did not request fallback rate, or we didn't need it */
txrate[0].count = tx_frame_count;
/* rc80211_minstrel.c:minstrel_tx_status() expects unused rates to be marked with idx = -1 */
txrate[1].idx = -1;
txrate[1].count = 0;
}

/* clear the rest of the rates */
for (i = 2; i < IEEE80211_TX_MAX_RATES; i++) {
txrate[i].idx = -1;
txrate[i].count = 0;
}

if (txs->status & TX_STATUS_ACK_RCV)
tx_info->flags |= IEEE80211_TX_STAT_ACK;
}

totlen = brcmu_pkttotlen(p);
free_pdu = true;

brcms_c_txfifo_complete(wlc, queue, 1);

if (lastframe) {
p->next = NULL;
p->prev = NULL;
/* remove PLCP & Broadcom tx descriptor header */
skb_pull(p, D11_PHY_HDR_LEN);
skb_pull(p, D11_TXH_LEN);
ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, p);
} else {
wiphy_err(wlc->wiphy, "%s: Not last frame => not calling "
"tx_status\n", __func__);
}

return false;

fatal:
if (p)
brcmu_pkt_buf_free_skb(p);

return true;

}

void
brcms_c_txfifo_complete(struct brcms_c_info *wlc, uint fifo, s8 txpktpend)
{
TXPKTPENDDEC(wlc, fifo, txpktpend);
BCMMSG(wlc->wiphy, "pktpend dec %d to %d\n", txpktpend,
TXPKTPENDGET(wlc, fifo));

/* There is more room; mark precedences related to this FIFO sendable */
BRCMS_TX_FIFO_ENAB(wlc, fifo);

/* Clear MHF2_TXBCMC_NOW flag if BCMC fifo has drained */
if (AP_ENAB(wlc->pub) &&
!TXPKTPENDGET(wlc, TX_BCMC_FIFO)) {
brcms_c_mhf(wlc, MHF2, MHF2_TXBCMC_NOW, 0, BRCM_BAND_AUTO);
}

/* figure out which bsscfg is being worked on... */
}

/* Update beacon listen interval in shared memory */
void brcms_c_bcn_li_upd(struct brcms_c_info *wlc)
{
if (AP_ENAB(wlc->pub))
return;

/* wake up every DTIM is the default */
if (wlc->bcn_li_dtim == 1)
brcms_c_write_shm(wlc, M_BCN_LI, 0);
else
brcms_c_write_shm(wlc, M_BCN_LI,
(wlc->bcn_li_dtim << 8) | wlc->bcn_li_bcn);
}

void
brcms_b_read_tsf(struct brcms_hardware *wlc_hw, u32 *tsf_l_ptr,
u32 *tsf_h_ptr)
{
struct d11regs *regs = wlc_hw->regs;

/* read the tsf timer low, then high to get an atomic read */
*tsf_l_ptr = R_REG(&regs->tsf_timerlow);
*tsf_h_ptr = R_REG(&regs->tsf_timerhigh);

return;
}

/*
* recover 64bit TSF value from the 16bit TSF value in the rx header
* given the assumption that the TSF passed in header is within 65ms
* of the current tsf.
*
* 6 5 4 4 3 2 1
* 3.......6.......8.......0.......2.......4.......6.......8......0
* |<---------- tsf_h ----------->||<--- tsf_l -->||<-RxTSFTime ->|
*
* The RxTSFTime are the lowest 16 bits and provided by the ucode. The
* tsf_l is filled in by brcms_b_recv, which is done earlier in the
* receive call sequence after rx interrupt. Only the higher 16 bits
* are used. Finally, the tsf_h is read from the tsf register.
*/
static u64 brcms_c_recover_tsf64(struct brcms_c_info *wlc,
struct brcms_d11rxhdr *rxh)
{
u32 tsf_h, tsf_l;
u16 rx_tsf_0_15, rx_tsf_16_31;

brcms_b_read_tsf(wlc->hw, &tsf_l, &tsf_h);

rx_tsf_16_31 = (u16)(tsf_l >> 16);
rx_tsf_0_15 = rxh->rxhdr.RxTSFTime;

/*
* a greater tsf time indicates the low 16 bits of
* tsf_l wrapped, so decrement the high 16 bits.
*/
if ((u16)tsf_l < rx_tsf_0_15) {
rx_tsf_16_31 -= 1;
if (rx_tsf_16_31 == 0xffff)
tsf_h -= 1;
}

return ((u64)tsf_h << 32) | (((u32)rx_tsf_16_31 << 16) + rx_tsf_0_15);
}

static void
prep_mac80211_status(struct brcms_c_info *wlc, struct d11rxhdr *rxh,
struct sk_buff *p,
struct ieee80211_rx_status *rx_status)
{
struct brcms_d11rxhdr *wlc_rxh = (struct brcms_d11rxhdr *) rxh;
int preamble;
int channel;
u32 rspec;
unsigned char *plcp;

/* fill in TSF and flag its presence */
rx_status->mactime = brcms_c_recover_tsf64(wlc, wlc_rxh);
rx_status->flag |= RX_FLAG_MACTIME_MPDU;

channel = BRCMS_CHAN_CHANNEL(rxh->RxChan);

if (channel > 14) {
rx_status->band = IEEE80211_BAND_5GHZ;
rx_status->freq = ieee80211_ofdm_chan_to_freq(
WF_CHAN_FACTOR_5_G/2, channel);

} else {
rx_status->band = IEEE80211_BAND_2GHZ;
rx_status->freq = ieee80211_dsss_chan_to_freq(channel);
}

rx_status->signal = wlc_rxh->rssi; /* signal */

/* noise */
/* qual */
rx_status->antenna = (rxh->PhyRxStatus_0 & PRXS0_RXANT_UPSUBBAND) ? 1 : 0; /* ant */

plcp = p->data;

rspec = brcms_c_compute_rspec(rxh, plcp);
if (IS_MCS(rspec)) {
rx_status->rate_idx = rspec & RSPEC_RATE_MASK;
rx_status->flag |= RX_FLAG_HT;
if (RSPEC_IS40MHZ(rspec))
rx_status->flag |= RX_FLAG_40MHZ;
} else {
switch (RSPEC2RATE(rspec)) {
case BRCM_RATE_1M:
rx_status->rate_idx = 0;
break;
case BRCM_RATE_2M:
rx_status->rate_idx = 1;
break;
case BRCM_RATE_5M5:
rx_status->rate_idx = 2;
break;
case BRCM_RATE_11M:
rx_status->rate_idx = 3;
break;
case BRCM_RATE_6M:
rx_status->rate_idx = 4;
break;
case BRCM_RATE_9M:
rx_status->rate_idx = 5;
break;
case BRCM_RATE_12M:
rx_status->rate_idx = 6;
break;
case BRCM_RATE_18M:
rx_status->rate_idx = 7;
break;
case BRCM_RATE_24M:
rx_status->rate_idx = 8;
break;
case BRCM_RATE_36M:
rx_status->rate_idx = 9;
break;
case BRCM_RATE_48M:
rx_status->rate_idx = 10;
break;
case BRCM_RATE_54M:
rx_status->rate_idx = 11;
break;
default:
wiphy_err(wlc->wiphy, "%s: Unknown rate\n", __func__);
}

/* Determine short preamble and rate_idx */
preamble = 0;
if (IS_CCK(rspec)) {
if (rxh->PhyRxStatus_0 & PRXS0_SHORTH)
rx_status->flag |= RX_FLAG_SHORTPRE;
} else if (IS_OFDM(rspec)) {
rx_status->flag |= RX_FLAG_SHORTPRE;
} else {
wiphy_err(wlc->wiphy, "%s: Unknown modulation\n",
__func__);
}
}

if (PLCP3_ISSGI(plcp[3]))
rx_status->flag |= RX_FLAG_SHORT_GI;

if (rxh->RxStatus1 & RXS_DECERR) {
rx_status->flag |= RX_FLAG_FAILED_PLCP_CRC;
wiphy_err(wlc->wiphy, "%s: RX_FLAG_FAILED_PLCP_CRC\n",
__func__);
}
if (rxh->RxStatus1 & RXS_FCSERR) {
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
wiphy_err(wlc->wiphy, "%s: RX_FLAG_FAILED_FCS_CRC\n",
__func__);
}
}

static void
brcms_c_recvctl(struct brcms_c_info *wlc, struct d11rxhdr *rxh,
struct sk_buff *p)
{
int len_mpdu;
struct ieee80211_rx_status rx_status;

memset(&rx_status, 0, sizeof(rx_status));
prep_mac80211_status(wlc, rxh, p, &rx_status);

/* mac header+body length, exclude CRC and plcp header */
len_mpdu = p->len - D11_PHY_HDR_LEN - FCS_LEN;
skb_pull(p, D11_PHY_HDR_LEN);
__skb_trim(p, len_mpdu);

memcpy(IEEE80211_SKB_RXCB(p), &rx_status, sizeof(rx_status));
ieee80211_rx_irqsafe(wlc->pub->ieee_hw, p);
return;
}

/* Process received frames */
/*
* Return true if more frames need to be processed. false otherwise.
* Param 'bound' indicates max. # frames to process before break out.
*/
void brcms_c_recv(struct brcms_c_info *wlc, struct sk_buff *p)
{
struct d11rxhdr *rxh;
struct ieee80211_hdr *h;
uint len;
bool is_amsdu;

BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

/* frame starts with rxhdr */
rxh = (struct d11rxhdr *) (p->data);

/* strip off rxhdr */
skb_pull(p, BRCMS_HWRXOFF);

/* fixup rx header endianness */
rxh->RxFrameSize = le16_to_cpu(rxh->RxFrameSize);
rxh->PhyRxStatus_0 = le16_to_cpu(rxh->PhyRxStatus_0);
rxh->PhyRxStatus_1 = le16_to_cpu(rxh->PhyRxStatus_1);
rxh->PhyRxStatus_2 = le16_to_cpu(rxh->PhyRxStatus_2);
rxh->PhyRxStatus_3 = le16_to_cpu(rxh->PhyRxStatus_3);
rxh->PhyRxStatus_4 = le16_to_cpu(rxh->PhyRxStatus_4);
rxh->PhyRxStatus_5 = le16_to_cpu(rxh->PhyRxStatus_5);
rxh->RxStatus1 = le16_to_cpu(rxh->RxStatus1);
rxh->RxStatus2 = le16_to_cpu(rxh->RxStatus2);
rxh->RxTSFTime = le16_to_cpu(rxh->RxTSFTime);
rxh->RxChan = le16_to_cpu(rxh->RxChan);

/* MAC inserts 2 pad bytes for a4 headers or QoS or A-MSDU subframes */
if (rxh->RxStatus1 & RXS_PBPRES) {
if (p->len < 2) {
wiphy_err(wlc->wiphy, "wl%d: recv: rcvd runt of "
"len %d\n", wlc->pub->unit, p->len);
goto toss;
}
skb_pull(p, 2);
}

h = (struct ieee80211_hdr *)(p->data + D11_PHY_HDR_LEN);
len = p->len;

if (rxh->RxStatus1 & RXS_FCSERR) {
if (wlc->pub->mac80211_state & MAC80211_PROMISC_BCNS) {
wiphy_err(wlc->wiphy, "FCSERR while scanning******* -"
" tossing\n");
goto toss;
} else {
wiphy_err(wlc->wiphy, "RCSERR!!!\n");
goto toss;
}
}

/* check received pkt has at least frame control field */
if (len < D11_PHY_HDR_LEN + sizeof(h->frame_control)) {
goto toss;
}

is_amsdu = rxh->RxStatus2 & RXS_AMSDU_MASK;

/* explicitly test bad src address to avoid sending bad deauth */
if (!is_amsdu) {
/* CTS and ACK CTL frames are w/o a2 */

if (ieee80211_is_data(h->frame_control) ||
ieee80211_is_mgmt(h->frame_control)) {
if ((is_zero_ether_addr(h->addr2) ||
is_multicast_ether_addr(h->addr2))) {
wiphy_err(wlc->wiphy, "wl%d: %s: dropping a "
"frame with invalid src mac address,"
" a2: %pM\n",
wlc->pub->unit, __func__, h->addr2);
goto toss;
}
}
}

/* due to sheer numbers, toss out probe reqs for now */
if (ieee80211_is_probe_req(h->frame_control))
goto toss;

if (is_amsdu)
goto toss;

brcms_c_recvctl(wlc, rxh, p);
return;

toss:
brcmu_pkt_buf_free_skb(p);
}

/* calculate frame duration for Mixed-mode L-SIG spoofing, return
* number of bytes goes in the length field
*
* Formula given by HT PHY Spec v 1.13
* len = 3(nsyms + nstream + 3) - 3
*/
u16
brcms_c_calc_lsig_len(struct brcms_c_info *wlc, u32 ratespec,
uint mac_len)
{
uint nsyms, len = 0, kNdps;

BCMMSG(wlc->wiphy, "wl%d: rate %d, len%d\n",
wlc->pub->unit, RSPEC2RATE(ratespec), mac_len);

if (IS_MCS(ratespec)) {
uint mcs = ratespec & RSPEC_RATE_MASK;
/* MCS_TXS(mcs) returns num tx streams - 1 */
int tot_streams = (MCS_TXS(mcs) + 1) + RSPEC_STC(ratespec);

/* the payload duration calculation matches that of regular ofdm */
/* 1000Ndbps = kbps * 4 */
kNdps =
MCS_RATE(mcs, RSPEC_IS40MHZ(ratespec),
RSPEC_ISSGI(ratespec)) * 4;

if (RSPEC_STC(ratespec) == 0)
/* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */
nsyms =
CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
APHY_TAIL_NBITS) * 1000, kNdps);
else
/* STBC needs to have even number of symbols */
nsyms =
2 *
CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
APHY_TAIL_NBITS) * 1000, 2 * kNdps);

nsyms += (tot_streams + 3); /* (+3) account for HT-SIG(2) and HT-STF(1) */
/* 3 bytes/symbol @ legacy 6Mbps rate */
len = (3 * nsyms) - 3; /* (-3) excluding service bits and tail bits */
}

return (u16) len;
}

/* calculate frame duration of a given rate and length, return time in usec unit */
uint
brcms_c_calc_frame_time(struct brcms_c_info *wlc, u32 ratespec,
u8 preamble_type, uint mac_len)
{
uint nsyms, dur = 0, Ndps, kNdps;
uint rate = RSPEC2RATE(ratespec);

if (rate == 0) {
wiphy_err(wlc->wiphy, "wl%d: WAR: using rate of 1 mbps\n",
wlc->pub->unit);
rate = BRCM_RATE_1M;
}

BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d, len%d\n",
wlc->pub->unit, ratespec, preamble_type, mac_len);

if (IS_MCS(ratespec)) {
uint mcs = ratespec & RSPEC_RATE_MASK;
int tot_streams = MCS_TXS(mcs) + RSPEC_STC(ratespec);

dur = PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT);
if (preamble_type == BRCMS_MM_PREAMBLE)
dur += PREN_MM_EXT;
/* 1000Ndbps = kbps * 4 */
kNdps =
MCS_RATE(mcs, RSPEC_IS40MHZ(ratespec),
RSPEC_ISSGI(ratespec)) * 4;

if (RSPEC_STC(ratespec) == 0)
/* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */
nsyms =
CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
APHY_TAIL_NBITS) * 1000, kNdps);
else
/* STBC needs to have even number of symbols */
nsyms =
2 *
CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
APHY_TAIL_NBITS) * 1000, 2 * kNdps);

dur += APHY_SYMBOL_TIME * nsyms;
if (BAND_2G(wlc->band->bandtype))
dur += DOT11_OFDM_SIGNAL_EXTENSION;
} else if (IS_OFDM(rate)) {
dur = APHY_PREAMBLE_TIME;
dur += APHY_SIGNAL_TIME;
/* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */
Ndps = rate * 2;
/* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */
nsyms =
CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS),
Ndps);
dur += APHY_SYMBOL_TIME * nsyms;
if (BAND_2G(wlc->band->bandtype))
dur += DOT11_OFDM_SIGNAL_EXTENSION;
} else {
/* calc # bits * 2 so factor of 2 in rate (1/2 mbps) will divide out */
mac_len = mac_len * 8 * 2;
/* calc ceiling of bits/rate = microseconds of air time */
dur = (mac_len + rate - 1) / rate;
if (preamble_type & BRCMS_SHORT_PREAMBLE)
dur += BPHY_PLCP_SHORT_TIME;
else
dur += BPHY_PLCP_TIME;
}
return dur;
}

/* The opposite of brcms_c_calc_frame_time */
static uint
brcms_c_calc_frame_len(struct brcms_c_info *wlc, u32 ratespec,
u8 preamble_type, uint dur)
{
uint nsyms, mac_len, Ndps, kNdps;
uint rate = RSPEC2RATE(ratespec);

BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d, dur %d\n",
wlc->pub->unit, ratespec, preamble_type, dur);

if (IS_MCS(ratespec)) {
uint mcs = ratespec & RSPEC_RATE_MASK;
int tot_streams = MCS_TXS(mcs) + RSPEC_STC(ratespec);
dur -= PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT);
/* payload calculation matches that of regular ofdm */
if (BAND_2G(wlc->band->bandtype))
dur -= DOT11_OFDM_SIGNAL_EXTENSION;
/* kNdbps = kbps * 4 */
kNdps =
MCS_RATE(mcs, RSPEC_IS40MHZ(ratespec),
RSPEC_ISSGI(ratespec)) * 4;
nsyms = dur / APHY_SYMBOL_TIME;
mac_len =
((nsyms * kNdps) -
((APHY_SERVICE_NBITS + APHY_TAIL_NBITS) * 1000)) / 8000;
} else if (IS_OFDM(ratespec)) {
dur -= APHY_PREAMBLE_TIME;
dur -= APHY_SIGNAL_TIME;
/* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */
Ndps = rate * 2;
nsyms = dur / APHY_SYMBOL_TIME;
mac_len =
((nsyms * Ndps) -
(APHY_SERVICE_NBITS + APHY_TAIL_NBITS)) / 8;
} else {
if (preamble_type & BRCMS_SHORT_PREAMBLE)
dur -= BPHY_PLCP_SHORT_TIME;
else
dur -= BPHY_PLCP_TIME;
mac_len = dur * rate;
/* divide out factor of 2 in rate (1/2 mbps) */
mac_len = mac_len / 8 / 2;
}
return mac_len;
}

static uint
brcms_c_calc_ba_time(struct brcms_c_info *wlc, u32 rspec,
u8 preamble_type)
{
BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, "
"preamble_type %d\n", wlc->pub->unit, rspec, preamble_type);
/* Spec 9.6: ack rate is the highest rate in BSSBasicRateSet that is less than
* or equal to the rate of the immediately previous frame in the FES
*/
rspec = BRCMS_BASIC_RATE(wlc, rspec);
/* BA len == 32 == 16(ctl hdr) + 4(ba len) + 8(bitmap) + 4(fcs) */
return brcms_c_calc_frame_time(wlc, rspec, preamble_type,
(DOT11_BA_LEN + DOT11_BA_BITMAP_LEN +
FCS_LEN));
}

static uint
brcms_c_calc_ack_time(struct brcms_c_info *wlc, u32 rspec,
u8 preamble_type)
{
uint dur = 0;

BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d\n",
wlc->pub->unit, rspec, preamble_type);
/* Spec 9.6: ack rate is the highest rate in BSSBasicRateSet that is less than
* or equal to the rate of the immediately previous frame in the FES
*/
rspec = BRCMS_BASIC_RATE(wlc, rspec);
/* ACK frame len == 14 == 2(fc) + 2(dur) + 6(ra) + 4(fcs) */
dur =
brcms_c_calc_frame_time(wlc, rspec, preamble_type,
(DOT11_ACK_LEN + FCS_LEN));
return dur;
}

static uint
brcms_c_calc_cts_time(struct brcms_c_info *wlc, u32 rspec,
u8 preamble_type)
{
BCMMSG(wlc->wiphy, "wl%d: ratespec 0x%x, preamble_type %d\n",
wlc->pub->unit, rspec, preamble_type);
return brcms_c_calc_ack_time(wlc, rspec, preamble_type);
}

/* derive wlc->band->basic_rate[] table from 'rateset' */
void brcms_c_rate_lookup_init(struct brcms_c_info *wlc,
struct brcms_c_rateset *rateset)
{
u8 rate;
u8 mandatory;
u8 cck_basic = 0;
u8 ofdm_basic = 0;
u8 *br = wlc->band->basic_rate;
uint i;

/* incoming rates are in 500kbps units as in 802.11 Supported Rates */
memset(br, 0, BRCM_MAXRATE + 1);

/* For each basic rate in the rates list, make an entry in the
* best basic lookup.
*/
for (i = 0; i < rateset->count; i++) {
/* only make an entry for a basic rate */
if (!(rateset->rates[i] & BRCMS_RATE_FLAG))
continue;

/* mask off basic bit */
rate = (rateset->rates[i] & BRCMS_RATE_MASK);

if (rate > BRCM_MAXRATE) {
wiphy_err(wlc->wiphy, "brcms_c_rate_lookup_init: "
"invalid rate 0x%X in rate set\n",
rateset->rates[i]);
continue;
}

br[rate] = rate;
}

/* The rate lookup table now has non-zero entries for each
* basic rate, equal to the basic rate: br[basicN] = basicN
*
* To look up the best basic rate corresponding to any
* particular rate, code can use the basic_rate table
* like this
*
* basic_rate = wlc->band->basic_rate[tx_rate]
*
* Make sure there is a best basic rate entry for
* every rate by walking up the table from low rates
* to high, filling in holes in the lookup table
*/

for (i = 0; i < wlc->band->hw_rateset.count; i++) {
rate = wlc->band->hw_rateset.rates[i];

if (br[rate] != 0) {
/* This rate is a basic rate.
* Keep track of the best basic rate so far by
* modulation type.
*/
if (IS_OFDM(rate))
ofdm_basic = rate;
else
cck_basic = rate;

continue;
}

/* This rate is not a basic rate so figure out the
* best basic rate less than this rate and fill in
* the hole in the table
*/

br[rate] = IS_OFDM(rate) ? ofdm_basic : cck_basic;

if (br[rate] != 0)
continue;

if (IS_OFDM(rate)) {
/* In 11g and 11a, the OFDM mandatory rates are 6, 12, and 24 Mbps */
if (rate >= BRCM_RATE_24M)
mandatory = BRCM_RATE_24M;
else if (rate >= BRCM_RATE_12M)
mandatory = BRCM_RATE_12M;
else
mandatory = BRCM_RATE_6M;
} else {
/* In 11b, all the CCK rates are mandatory 1 - 11 Mbps */
mandatory = rate;
}

br[rate] = mandatory;
}
}

static void brcms_c_write_rate_shm(struct brcms_c_info *wlc, u8 rate,
u8 basic_rate)
{
u8 phy_rate, index;
u8 basic_phy_rate, basic_index;
u16 dir_table, basic_table;
u16 basic_ptr;

/* Shared memory address for the table we are reading */
dir_table = IS_OFDM(basic_rate) ? M_RT_DIRMAP_A : M_RT_DIRMAP_B;

/* Shared memory address for the table we are writing */
basic_table = IS_OFDM(rate) ? M_RT_BBRSMAP_A : M_RT_BBRSMAP_B;

/*
* for a given rate, the LS-nibble of the PLCP SIGNAL field is
* the index into the rate table.
*/
phy_rate = rate_info[rate] & BRCMS_RATE_MASK;
basic_phy_rate = rate_info[basic_rate] & BRCMS_RATE_MASK;
index = phy_rate & 0xf;
basic_index = basic_phy_rate & 0xf;

/* Find the SHM pointer to the ACK rate entry by looking in the
* Direct-map Table
*/
basic_ptr = brcms_c_read_shm(wlc, (dir_table + basic_index * 2));

/* Update the SHM BSS-basic-rate-set mapping table with the pointer
* to the correct basic rate for the given incoming rate
*/
brcms_c_write_shm(wlc, (basic_table + index * 2), basic_ptr);
}

static const struct brcms_c_rateset *
brcms_c_rateset_get_hwrs(struct brcms_c_info *wlc)
{
const struct brcms_c_rateset *rs_dflt;

if (BRCMS_PHY_11N_CAP(wlc->band)) {
if (BAND_5G(wlc->band->bandtype))
rs_dflt = &ofdm_mimo_rates;
else
rs_dflt = &cck_ofdm_mimo_rates;
} else if (wlc->band->gmode)
rs_dflt = &cck_ofdm_rates;
else
rs_dflt = &cck_rates;

return rs_dflt;
}

void brcms_c_set_ratetable(struct brcms_c_info *wlc)
{
const struct brcms_c_rateset *rs_dflt;
struct brcms_c_rateset rs;
u8 rate, basic_rate;
uint i;

rs_dflt = brcms_c_rateset_get_hwrs(wlc);

brcms_c_rateset_copy(rs_dflt, &rs);
brcms_c_rateset_mcs_upd(&rs, wlc->stf->txstreams);

/* walk the phy rate table and update SHM basic rate lookup table */
for (i = 0; i < rs.count; i++) {
rate = rs.rates[i] & BRCMS_RATE_MASK;

/* for a given rate BRCMS_BASIC_RATE returns the rate at
* which a response ACK/CTS should be sent.
*/
basic_rate = BRCMS_BASIC_RATE(wlc, rate);
if (basic_rate == 0) {
/* This should only happen if we are using a
* restricted rateset.
*/
basic_rate = rs.rates[0] & BRCMS_RATE_MASK;
}

brcms_c_write_rate_shm(wlc, rate, basic_rate);
}
}

/*
* Return true if the specified rate is supported by the specified band.
* BRCM_BAND_AUTO indicates the current band.
*/
bool brcms_c_valid_rate(struct brcms_c_info *wlc, u32 rspec, int band,
bool verbose)
{
struct brcms_c_rateset *hw_rateset;
uint i;

if ((band == BRCM_BAND_AUTO) || (band == wlc->band->bandtype)) {
hw_rateset = &wlc->band->hw_rateset;
} else if (NBANDS(wlc) > 1) {
hw_rateset = &wlc->bandstate[OTHERBANDUNIT(wlc)]->hw_rateset;
} else {
/* other band specified and we are a single band device */
return false;
}

/* check if this is a mimo rate */
if (IS_MCS(rspec)) {
if (!VALID_MCS((rspec & RSPEC_RATE_MASK)))
goto error;

return isset(hw_rateset->mcs, (rspec & RSPEC_RATE_MASK));
}

for (i = 0; i < hw_rateset->count; i++)
if (hw_rateset->rates[i] == RSPEC2RATE(rspec))
return true;
error:
if (verbose) {
wiphy_err(wlc->wiphy, "wl%d: valid_rate: rate spec 0x%x "
"not in hw_rateset\n", wlc->pub->unit, rspec);
}

return false;
}

static void brcms_c_update_mimo_band_bwcap(struct brcms_c_info *wlc, u8 bwcap)
{
uint i;
struct brcms_band *band;

for (i = 0; i < NBANDS(wlc); i++) {
if (IS_SINGLEBAND_5G(wlc->deviceid))
i = BAND_5G_INDEX;
band = wlc->bandstate[i];
if (band->bandtype == BRCM_BAND_5G) {
if ((bwcap == BRCMS_N_BW_40ALL)
|| (bwcap == BRCMS_N_BW_20IN2G_40IN5G))
band->mimo_cap_40 = true;
else
band->mimo_cap_40 = false;
} else {
if (bwcap == BRCMS_N_BW_40ALL)
band->mimo_cap_40 = true;
else
band->mimo_cap_40 = false;
}
}
}

void brcms_c_mod_prb_rsp_rate_table(struct brcms_c_info *wlc, uint frame_len)
{
const struct brcms_c_rateset *rs_dflt;
struct brcms_c_rateset rs;
u8 rate;
u16 entry_ptr;
u8 plcp[D11_PHY_HDR_LEN];
u16 dur, sifs;
uint i;

sifs = SIFS(wlc->band);

rs_dflt = brcms_c_rateset_get_hwrs(wlc);

brcms_c_rateset_copy(rs_dflt, &rs);
brcms_c_rateset_mcs_upd(&rs, wlc->stf->txstreams);

/* walk the phy rate table and update MAC core SHM basic rate table entries */
for (i = 0; i < rs.count; i++) {
rate = rs.rates[i] & BRCMS_RATE_MASK;

entry_ptr = brcms_c_rate_shm_offset(wlc, rate);

/* Calculate the Probe Response PLCP for the given rate */
brcms_c_compute_plcp(wlc, rate, frame_len, plcp);

/* Calculate the duration of the Probe Response frame plus SIFS for the MAC */
dur = (u16) brcms_c_calc_frame_time(wlc, rate,
BRCMS_LONG_PREAMBLE, frame_len);
dur += sifs;

/* Update the SHM Rate Table entry Probe Response values */
brcms_c_write_shm(wlc, entry_ptr + M_RT_PRS_PLCP_POS,
(u16) (plcp[0] + (plcp[1] << 8)));
brcms_c_write_shm(wlc, entry_ptr + M_RT_PRS_PLCP_POS + 2,
(u16) (plcp[2] + (plcp[3] << 8)));
brcms_c_write_shm(wlc, entry_ptr + M_RT_PRS_DUR_POS, dur);
}
}

/* Max buffering needed for beacon template/prb resp template is 142 bytes.
*
* PLCP header is 6 bytes.
* 802.11 A3 header is 24 bytes.
* Max beacon frame body template length is 112 bytes.
* Max probe resp frame body template length is 110 bytes.
*
* *len on input contains the max length of the packet available.
*
* The *len value is set to the number of bytes in buf used, and starts with the PLCP
* and included up to, but not including, the 4 byte FCS.
*/
static void
brcms_c_bcn_prb_template(struct brcms_c_info *wlc, u16 type,
u32 bcn_rspec,
struct brcms_bss_cfg *cfg, u16 *buf, int *len)
{
static const u8 ether_bcast[ETH_ALEN] = {255, 255, 255, 255, 255, 255};
struct cck_phy_hdr *plcp;
struct ieee80211_mgmt *h;
int hdr_len, body_len;

if (MBSS_BCN_ENAB(cfg) && type == IEEE80211_STYPE_BEACON)
hdr_len = DOT11_MAC_HDR_LEN;
else
hdr_len = D11_PHY_HDR_LEN + DOT11_MAC_HDR_LEN;
body_len = *len - hdr_len; /* calc buffer size provided for frame body */

*len = hdr_len + body_len; /* return actual size */

/* format PHY and MAC headers */
memset((char *)buf, 0, hdr_len);

plcp = (struct cck_phy_hdr *) buf;

/* PLCP for Probe Response frames are filled in from core's rate table */
if (type == IEEE80211_STYPE_BEACON && !MBSS_BCN_ENAB(cfg)) {
/* fill in PLCP */
brcms_c_compute_plcp(wlc, bcn_rspec,
(DOT11_MAC_HDR_LEN + body_len + FCS_LEN),
(u8 *) plcp);

}
/* "Regular" and 16 MBSS but not for 4 MBSS */
/* Update the phytxctl for the beacon based on the rspec */
if (!SOFTBCN_ENAB(cfg))
brcms_c_beacon_phytxctl_txant_upd(wlc, bcn_rspec);

if (MBSS_BCN_ENAB(cfg) && type == IEEE80211_STYPE_BEACON)
h = (struct ieee80211_mgmt *)&plcp[0];
else
h = (struct ieee80211_mgmt *)&plcp[1];

/* fill in 802.11 header */
h->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | type);

/* DUR is 0 for multicast bcn, or filled in by MAC for prb resp */
/* A1 filled in by MAC for prb resp, broadcast for bcn */
if (type == IEEE80211_STYPE_BEACON)
memcpy(&h->da, &ether_bcast, ETH_ALEN);
memcpy(&h->sa, &cfg->cur_etheraddr, ETH_ALEN);
memcpy(&h->bssid, &cfg->BSSID, ETH_ALEN);

/* SEQ filled in by MAC */

return;
}

int brcms_c_get_header_len()
{
return TXOFF;
}

/* mac is assumed to be suspended at this point */
void
brcms_b_write_hw_bcntemplates(struct brcms_hardware *wlc_hw, void *bcn,
int len, bool both)
{
struct d11regs *regs = wlc_hw->regs;

if (both) {
brcms_c_write_hw_bcntemplate0(wlc_hw, bcn, len);
brcms_c_write_hw_bcntemplate1(wlc_hw, bcn, len);
} else {
/* bcn 0 */
if (!(R_REG(&regs->maccommand) & MCMD_BCN0VLD))
brcms_c_write_hw_bcntemplate0(wlc_hw, bcn, len);
/* bcn 1 */
else if (!
(R_REG(&regs->maccommand) & MCMD_BCN1VLD))
brcms_c_write_hw_bcntemplate1(wlc_hw, bcn, len);
}
}

/* Update a beacon for a particular BSS
* For MBSS, this updates the software template and sets "latest" to the index of the
* template updated.
* Otherwise, it updates the hardware template.
*/
void brcms_c_bss_update_beacon(struct brcms_c_info *wlc,
struct brcms_bss_cfg *cfg)
{
int len = BCN_TMPL_LEN;

/* Clear the soft intmask */
wlc->defmacintmask &= ~MI_BCNTPL;

if (!cfg->up) { /* Only allow updates on an UP bss */
return;
}

/* Optimize: Some of if/else could be combined */
if (!MBSS_BCN_ENAB(cfg) && HWBCN_ENAB(cfg)) {
/* Hardware beaconing for this config */
u16 bcn[BCN_TMPL_LEN / 2];
u32 both_valid = MCMD_BCN0VLD | MCMD_BCN1VLD;
struct d11regs *regs = wlc->regs;

/* Check if both templates are in use, if so sched. an interrupt
* that will call back into this routine
*/
if ((R_REG(&regs->maccommand) & both_valid) == both_valid) {
/* clear any previous status */
W_REG(&regs->macintstatus, MI_BCNTPL);
}
/* Check that after scheduling the interrupt both of the
* templates are still busy. if not clear the int. & remask
*/
if ((R_REG(&regs->maccommand) & both_valid) == both_valid) {
wlc->defmacintmask |= MI_BCNTPL;
return;
}

wlc->bcn_rspec =
brcms_c_lowest_basic_rspec(wlc, &cfg->current_bss->rateset);
/* update the template and ucode shm */
brcms_c_bcn_prb_template(wlc, IEEE80211_STYPE_BEACON,
wlc->bcn_rspec, cfg, bcn, &len);
brcms_c_write_hw_bcntemplates(wlc, bcn, len, false);
}
}

/*
* Update all beacons for the system.
*/
void brcms_c_update_beacon(struct brcms_c_info *wlc)
{
int idx;
struct brcms_bss_cfg *bsscfg;

/* update AP or IBSS beacons */
FOREACH_BSS(wlc, idx, bsscfg)
if (bsscfg->up && (BSSCFG_AP(bsscfg) || !bsscfg->BSS))
brcms_c_bss_update_beacon(wlc, bsscfg);
END_FOREACH_BSS
}

/* Write ssid into shared memory */
void brcms_c_shm_ssid_upd(struct brcms_c_info *wlc, struct brcms_bss_cfg *cfg)
{
u8 *ssidptr = cfg->SSID;
u16 base = M_SSID;
u8 ssidbuf[IEEE80211_MAX_SSID_LEN];

/* padding the ssid with zero and copy it into shm */
memset(ssidbuf, 0, IEEE80211_MAX_SSID_LEN);
memcpy(ssidbuf, ssidptr, cfg->SSID_len);

brcms_c_copyto_shm(wlc, base, ssidbuf, IEEE80211_MAX_SSID_LEN);

if (!MBSS_BCN_ENAB(cfg))
brcms_c_write_shm(wlc, M_SSIDLEN, (u16) cfg->SSID_len);
}

void brcms_c_update_probe_resp(struct brcms_c_info *wlc, bool suspend)
{
int idx;
struct brcms_bss_cfg *bsscfg;

/* update AP or IBSS probe responses */
FOREACH_BSS(wlc, idx, bsscfg)
if (bsscfg->up && (BSSCFG_AP(bsscfg) || !bsscfg->BSS))
brcms_c_bss_update_probe_resp(wlc, bsscfg, suspend);
END_FOREACH_BSS
}

void
brcms_c_bss_update_probe_resp(struct brcms_c_info *wlc,
struct brcms_bss_cfg *cfg,
bool suspend)
{
u16 prb_resp[BCN_TMPL_LEN / 2];
int len = BCN_TMPL_LEN;

/* write the probe response to hardware, or save in the config structure */
if (!MBSS_PRB_ENAB(cfg)) {

/* create the probe response template */
brcms_c_bcn_prb_template(wlc, IEEE80211_STYPE_PROBE_RESP, 0,
cfg, prb_resp, &len);

if (suspend)
brcms_c_suspend_mac_and_wait(wlc);

/* write the probe response into the template region */
brcms_b_write_template_ram(wlc->hw, T_PRS_TPL_BASE,
(len + 3) & ~3, prb_resp);

/* write the length of the probe response frame (+PLCP/-FCS) */
brcms_c_write_shm(wlc, M_PRB_RESP_FRM_LEN, (u16) len);

/* write the SSID and SSID length */
brcms_c_shm_ssid_upd(wlc, cfg);

/*
* Write PLCP headers and durations for probe response frames at all rates.
* Use the actual frame length covered by the PLCP header for the call to
* brcms_c_mod_prb_rsp_rate_table() by subtracting the PLCP len
* and adding the FCS.
*/
len += (-D11_PHY_HDR_LEN + FCS_LEN);
brcms_c_mod_prb_rsp_rate_table(wlc, (u16) len);

if (suspend)
brcms_c_enable_mac(wlc);
} else { /* Generating probe resp in sw; update local template */
/* error: No software probe response support without MBSS */
}
}

/* prepares pdu for transmission. returns BCM error codes */
int brcms_c_prep_pdu(struct brcms_c_info *wlc, struct sk_buff *pdu, uint *fifop)
{
uint fifo;
struct d11txh *txh;
struct ieee80211_hdr *h;
struct scb *scb;

txh = (struct d11txh *) (pdu->data);
h = (struct ieee80211_hdr *)((u8 *) (txh + 1) + D11_PHY_HDR_LEN);

/* get the pkt queue info. This was put at brcms_c_sendctl or
* brcms_c_send for PDU */
fifo = le16_to_cpu(txh->TxFrameID) & TXFID_QUEUE_MASK;

scb = NULL;

*fifop = fifo;

/* return if insufficient dma resources */
if (TXAVAIL(wlc, fifo) < MAX_DMA_SEGS) {
/* Mark precedences related to this FIFO, unsendable */
BRCMS_TX_FIFO_CLEAR(wlc, fifo);
return -EBUSY;
}
return 0;
}

/* init tx reported rate mechanism */
void brcms_c_reprate_init(struct brcms_c_info *wlc)
{
int i;
struct brcms_bss_cfg *bsscfg;

FOREACH_BSS(wlc, i, bsscfg)
brcms_c_bsscfg_reprate_init(bsscfg);
END_FOREACH_BSS
}

/* per bsscfg init tx reported rate mechanism */
void brcms_c_bsscfg_reprate_init(struct brcms_bss_cfg *bsscfg)
{
bsscfg->txrspecidx = 0;
memset((char *)bsscfg->txrspec, 0, sizeof(bsscfg->txrspec));
}

void brcms_default_rateset(struct brcms_c_info *wlc, struct brcms_c_rateset *rs)
{
brcms_c_rateset_default(rs, NULL, wlc->band->phytype,
wlc->band->bandtype, false, BRCMS_RATE_MASK_FULL,
(bool) N_ENAB(wlc->pub),
CHSPEC_WLC_BW(wlc->default_bss->chanspec),
wlc->stf->txstreams);
}

static void brcms_c_bss_default_init(struct brcms_c_info *wlc)
{
u16 chanspec;
struct brcms_band *band;
struct brcms_bss_info *bi = wlc->default_bss;

/* init default and target BSS with some sane initial values */
memset((char *)(bi), 0, sizeof(struct brcms_bss_info));
bi->beacon_period = BEACON_INTERVAL_DEFAULT;
bi->dtim_period = DTIM_INTERVAL_DEFAULT;

/* fill the default channel as the first valid channel
* starting from the 2G channels
*/
chanspec = CH20MHZ_CHSPEC(1);
wlc->home_chanspec = bi->chanspec = chanspec;

/* find the band of our default channel */
band = wlc->band;
if (NBANDS(wlc) > 1 && band->bandunit != CHSPEC_BANDUNIT(chanspec))
band = wlc->bandstate[OTHERBANDUNIT(wlc)];

/* init bss rates to the band specific default rate set */
brcms_c_rateset_default(&bi->rateset, NULL, band->phytype,
band->bandtype, false, BRCMS_RATE_MASK_FULL,
(bool) N_ENAB(wlc->pub), CHSPEC_WLC_BW(chanspec),
wlc->stf->txstreams);

if (N_ENAB(wlc->pub))
bi->flags |= BRCMS_BSS_HT;
}

static u32
mac80211_wlc_set_nrate(struct brcms_c_info *wlc, struct brcms_band *cur_band,
u32 int_val)
{
u8 stf = (int_val & NRATE_STF_MASK) >> NRATE_STF_SHIFT;
u8 rate = int_val & NRATE_RATE_MASK;
u32 rspec;
bool ismcs = ((int_val & NRATE_MCS_INUSE) == NRATE_MCS_INUSE);
bool issgi = ((int_val & NRATE_SGI_MASK) >> NRATE_SGI_SHIFT);
bool override_mcs_only = ((int_val & NRATE_OVERRIDE_MCS_ONLY)
== NRATE_OVERRIDE_MCS_ONLY);
int bcmerror = 0;

if (!ismcs) {
return (u32) rate;
}

/* validate the combination of rate/mcs/stf is allowed */
if (N_ENAB(wlc->pub) && ismcs) {
/* mcs only allowed when nmode */
if (stf > PHY_TXC1_MODE_SDM) {
wiphy_err(wlc->wiphy, "wl%d: %s: Invalid stf\n",
BRCMS_UNIT(wlc), __func__);
bcmerror = -EINVAL;
goto done;
}

/* mcs 32 is a special case, DUP mode 40 only */
if (rate == 32) {
if (!CHSPEC_IS40(wlc->home_chanspec) ||
((stf != PHY_TXC1_MODE_SISO)
&& (stf != PHY_TXC1_MODE_CDD))) {
wiphy_err(wlc->wiphy, "wl%d: %s: Invalid mcs "
"32\n", BRCMS_UNIT(wlc), __func__);
bcmerror = -EINVAL;
goto done;
}
/* mcs > 7 must use stf SDM */
} else if (rate > HIGHEST_SINGLE_STREAM_MCS) {
/* mcs > 7 must use stf SDM */
if (stf != PHY_TXC1_MODE_SDM) {
BCMMSG(wlc->wiphy, "wl%d: enabling "
"SDM mode for mcs %d\n",
BRCMS_UNIT(wlc), rate);
stf = PHY_TXC1_MODE_SDM;
}
} else {
/* MCS 0-7 may use SISO, CDD, and for phy_rev >= 3 STBC */
if ((stf > PHY_TXC1_MODE_STBC) ||
(!BRCMS_STBC_CAP_PHY(wlc)
&& (stf == PHY_TXC1_MODE_STBC))) {
wiphy_err(wlc->wiphy, "wl%d: %s: Invalid STBC"
"\n", BRCMS_UNIT(wlc), __func__);
bcmerror = -EINVAL;
goto done;
}
}
} else if (IS_OFDM(rate)) {
if ((stf != PHY_TXC1_MODE_CDD) && (stf != PHY_TXC1_MODE_SISO)) {
wiphy_err(wlc->wiphy, "wl%d: %s: Invalid OFDM\n",
BRCMS_UNIT(wlc), __func__);
bcmerror = -EINVAL;
goto done;
}
} else if (IS_CCK(rate)) {
if ((cur_band->bandtype != BRCM_BAND_2G)
|| (stf != PHY_TXC1_MODE_SISO)) {
wiphy_err(wlc->wiphy, "wl%d: %s: Invalid CCK\n",
BRCMS_UNIT(wlc), __func__);
bcmerror = -EINVAL;
goto done;
}
} else {
wiphy_err(wlc->wiphy, "wl%d: %s: Unknown rate type\n",
BRCMS_UNIT(wlc), __func__);
bcmerror = -EINVAL;
goto done;
}
/* make sure multiple antennae are available for non-siso rates */
if ((stf != PHY_TXC1_MODE_SISO) && (wlc->stf->txstreams == 1)) {
wiphy_err(wlc->wiphy, "wl%d: %s: SISO antenna but !SISO "
"request\n", BRCMS_UNIT(wlc), __func__);
bcmerror = -EINVAL;
goto done;
}

rspec = rate;
if (ismcs) {
rspec |= RSPEC_MIMORATE;
/* For STBC populate the STC field of the ratespec */
if (stf == PHY_TXC1_MODE_STBC) {
u8 stc;
stc = 1; /* Nss for single stream is always 1 */
rspec |= (stc << RSPEC_STC_SHIFT);
}
}

rspec |= (stf << RSPEC_STF_SHIFT);

if (override_mcs_only)
rspec |= RSPEC_OVERRIDE_MCS_ONLY;

if (issgi)
rspec |= RSPEC_SHORT_GI;

if ((rate != 0)
&& !brcms_c_valid_rate(wlc, rspec, cur_band->bandtype, true)) {
return rate;
}

return rspec;
done:
return rate;
}

/* formula: IDLE_BUSY_RATIO_X_16 = (100-duty_cycle)/duty_cycle*16 */
static int
brcms_c_duty_cycle_set(struct brcms_c_info *wlc, int duty_cycle, bool isOFDM,
bool writeToShm)
{
int idle_busy_ratio_x_16 = 0;
uint offset =
isOFDM ? M_TX_IDLE_BUSY_RATIO_X_16_OFDM :
M_TX_IDLE_BUSY_RATIO_X_16_CCK;
if (duty_cycle > 100 || duty_cycle < 0) {
wiphy_err(wlc->wiphy, "wl%d: duty cycle value off limit\n",
wlc->pub->unit);
return -EINVAL;
}
if (duty_cycle)
idle_busy_ratio_x_16 = (100 - duty_cycle) * 16 / duty_cycle;
/* Only write to shared memory when wl is up */
if (writeToShm)
brcms_c_write_shm(wlc, offset, (u16) idle_busy_ratio_x_16);

if (isOFDM)
wlc->tx_duty_cycle_ofdm = (u16) duty_cycle;
else
wlc->tx_duty_cycle_cck = (u16) duty_cycle;

return 0;
}

/* Read a single u16 from shared memory.
* SHM 'offset' needs to be an even address
*/
u16 brcms_c_read_shm(struct brcms_c_info *wlc, uint offset)
{
return brcms_b_read_shm(wlc->hw, offset);
}

/* Write a single u16 to shared memory.
* SHM 'offset' needs to be an even address
*/
void brcms_c_write_shm(struct brcms_c_info *wlc, uint offset, u16 v)
{
brcms_b_write_shm(wlc->hw, offset, v);
}

/* Copy a buffer to shared memory.
* SHM 'offset' needs to be an even address and
* Buffer length 'len' must be an even number of bytes
*/
void brcms_c_copyto_shm(struct brcms_c_info *wlc, uint offset, const void *buf,
int len)
{
/* offset and len need to be even */
if (len <= 0 || (offset & 1) || (len & 1))
return;

brcms_b_copyto_objmem(wlc->hw, offset, buf, len, OBJADDR_SHM_SEL);

}

/* wrapper BMAC functions to for HIGH driver access */
void brcms_c_mctrl(struct brcms_c_info *wlc, u32 mask, u32 val)
{
brcms_b_mctrl(wlc->hw, mask, val);
}

void brcms_c_mhf(struct brcms_c_info *wlc, u8 idx, u16 mask, u16 val, int bands)
{
brcms_b_mhf(wlc->hw, idx, mask, val, bands);
}

int brcms_b_xmtfifo_sz_get(struct brcms_hardware *wlc_hw, uint fifo,
uint *blocks)
{
if (fifo >= NFIFO)
return -EINVAL;

*blocks = wlc_hw->xmtfifo_sz[fifo];

return 0;
}

int brcms_c_xmtfifo_sz_get(struct brcms_c_info *wlc, uint fifo, uint *blocks)
{
return brcms_b_xmtfifo_sz_get(wlc->hw, fifo, blocks);
}

void brcms_c_write_template_ram(struct brcms_c_info *wlc, int offset, int len,
void *buf)
{
brcms_b_write_template_ram(wlc->hw, offset, len, buf);
}

void brcms_c_write_hw_bcntemplates(struct brcms_c_info *wlc, void *bcn, int len,
bool both)
{
brcms_b_write_hw_bcntemplates(wlc->hw, bcn, len, both);
}

void
brcms_c_set_addrmatch(struct brcms_c_info *wlc, int match_reg_offset,
const u8 *addr)
{
brcms_b_set_addrmatch(wlc->hw, match_reg_offset, addr);
if (match_reg_offset == RCM_BSSID_OFFSET)
memcpy(wlc->cfg->BSSID, addr, ETH_ALEN);
}

void brcms_c_pllreq(struct brcms_c_info *wlc, bool set, u32 req_bit)
{
brcms_b_pllreq(wlc->hw, set, req_bit);
}

void brcms_c_reset_bmac_done(struct brcms_c_info *wlc)
{
}

/* check for the particular priority flow control bit being set */
bool
brcms_c_txflowcontrol_prio_isset(struct brcms_c_info *wlc,
struct brcms_txq_info *q,
int prio)
{
uint prio_mask;

if (prio == ALLPRIO) {
prio_mask = TXQ_STOP_FOR_PRIOFC_MASK;
} else {
prio_mask = NBITVAL(prio);
}

return (q->stopped & prio_mask) == prio_mask;
}

/* propagate the flow control to all interfaces using the given tx queue */
void brcms_c_txflowcontrol(struct brcms_c_info *wlc,
struct brcms_txq_info *qi,
bool on, int prio)
{
uint prio_bits;
uint cur_bits;

BCMMSG(wlc->wiphy, "flow control kicks in\n");

if (prio == ALLPRIO) {
prio_bits = TXQ_STOP_FOR_PRIOFC_MASK;
} else {
prio_bits = NBITVAL(prio);
}

cur_bits = qi->stopped & prio_bits;

/* Check for the case of no change and return early
* Otherwise update the bit and continue
*/
if (on) {
if (cur_bits == prio_bits) {
return;
}
mboolset(qi->stopped, prio_bits);
} else {
if (cur_bits == 0) {
return;
}
mboolclr(qi->stopped, prio_bits);
}

/* If there is a flow control override we will not change the external
* flow control state.
*/
if (qi->stopped & ~TXQ_STOP_FOR_PRIOFC_MASK) {
return;
}

brcms_c_txflowcontrol_signal(wlc, qi, on, prio);
}

void
brcms_c_txflowcontrol_override(struct brcms_c_info *wlc,
struct brcms_txq_info *qi,
bool on, uint override)
{
uint prev_override;

prev_override = (qi->stopped & ~TXQ_STOP_FOR_PRIOFC_MASK);

/* Update the flow control bits and do an early return if there is
* no change in the external flow control state.
*/
if (on) {
mboolset(qi->stopped, override);
/* if there was a previous override bit on, then setting this
* makes no difference.
*/
if (prev_override) {
return;
}

brcms_c_txflowcontrol_signal(wlc, qi, ON, ALLPRIO);
} else {
mboolclr(qi->stopped, override);
/* clearing an override bit will only make a difference for
* flow control if it was the only bit set. For any other
* override setting, just return
*/
if (prev_override != override) {
return;
}

if (qi->stopped == 0) {
brcms_c_txflowcontrol_signal(wlc, qi, OFF, ALLPRIO);
} else {
int prio;

for (prio = MAXPRIO; prio >= 0; prio--) {
if (!mboolisset(qi->stopped, NBITVAL(prio)))
brcms_c_txflowcontrol_signal(
wlc, qi, OFF, prio);
}
}
}
}

static void brcms_c_txflowcontrol_reset(struct brcms_c_info *wlc)
{
struct brcms_txq_info *qi;

for (qi = wlc->tx_queues; qi != NULL; qi = qi->next) {
if (qi->stopped) {
brcms_c_txflowcontrol_signal(wlc, qi, OFF, ALLPRIO);
qi->stopped = 0;
}
}
}

static void
brcms_c_txflowcontrol_signal(struct brcms_c_info *wlc,
struct brcms_txq_info *qi, bool on, int prio)
{
#ifdef NON_FUNCTIONAL
/* wlcif_list is never filled so this function is not functional */
struct brcms_c_if *wlcif;

for (wlcif = wlc->wlcif_list; wlcif != NULL; wlcif = wlcif->next) {
if (wlcif->qi == qi && wlcif->flags & BRCMS_IF_LINKED)
brcms_txflowcontrol(wlc->wl, wlcif->wlif, on, prio);
}
#endif
}

static struct brcms_txq_info *brcms_c_txq_alloc(struct brcms_c_info *wlc)
{
struct brcms_txq_info *qi, *p;

qi = kzalloc(sizeof(struct brcms_txq_info), GFP_ATOMIC);
if (qi != NULL) {
/*
* Have enough room for control packets along with HI watermark
* Also, add room to txq for total psq packets if all the SCBs
* leave PS mode. The watermark for flowcontrol to OS packets
* will remain the same
*/
brcmu_pktq_init(&qi->q, BRCMS_PREC_COUNT,
(2 * wlc->pub->tunables->datahiwat) + PKTQ_LEN_DEFAULT
+ wlc->pub->psq_pkts_total);

/* add this queue to the the global list */
p = wlc->tx_queues;
if (p == NULL) {
wlc->tx_queues = qi;
} else {
while (p->next != NULL)
p = p->next;
p->next = qi;
}
}
return qi;
}

static void brcms_c_txq_free(struct brcms_c_info *wlc,
struct brcms_txq_info *qi)
{
struct brcms_txq_info *p;

if (qi == NULL)
return;

/* remove the queue from the linked list */
p = wlc->tx_queues;
if (p == qi)
wlc->tx_queues = p->next;
else {
while (p != NULL && p->next != qi)
p = p->next;
if (p != NULL)
p->next = p->next->next;
}

kfree(qi);
}

/*
* Flag 'scan in progress' to withhold dynamic phy calibration
*/
void brcms_c_scan_start(struct brcms_c_info *wlc)
{
wlc_phy_hold_upd(wlc->band->pi, PHY_HOLD_FOR_SCAN, true);
}

void brcms_c_scan_stop(struct brcms_c_info *wlc)
{
wlc_phy_hold_upd(wlc->band->pi, PHY_HOLD_FOR_SCAN, false);
}

void brcms_c_associate_upd(struct brcms_c_info *wlc, bool state)
{
wlc->pub->associated = state;
wlc->cfg->associated = state;
}

/*
* When a remote STA/AP is removed by Mac80211, or when it can no longer accept
* AMPDU traffic, packets pending in hardware have to be invalidated so that
* when later on hardware releases them, they can be handled appropriately.
*/
void brcms_c_inval_dma_pkts(struct brcms_hardware *hw,
struct ieee80211_sta *sta,
void (*dma_callback_fn))
{
struct dma_pub *dmah;
int i;
for (i = 0; i < NFIFO; i++) {
dmah = hw->di[i];
if (dmah != NULL)
dma_walk_packets(dmah, dma_callback_fn, sta);
}
}

int brcms_c_get_curband(struct brcms_c_info *wlc)
{
return wlc->band->bandunit;
}

void brcms_c_wait_for_tx_completion(struct brcms_c_info *wlc, bool drop)
{
/* flush packet queue when requested */
if (drop)
brcmu_pktq_flush(&wlc->pkt_queue->q, false, NULL, NULL);

/* wait for queue and DMA fifos to run dry */
while (!pktq_empty(&wlc->pkt_queue->q) ||
TXPKTPENDTOT(wlc) > 0) {
brcms_msleep(wlc->wl, 1);
}
}

int brcms_c_set_par(struct brcms_c_info *wlc, enum wlc_par_id par_id,
int int_val)
{
int err = 0;

switch (par_id) {
case IOV_BCN_LI_BCN:
wlc->bcn_li_bcn = (u8) int_val;
if (wlc->pub->up)
brcms_c_bcn_li_upd(wlc);
break;
/* As long as override is false, this only sets the *user*
targets. User can twiddle this all he wants with no harm.
wlc_phy_txpower_set() explicitly sets override to false if
not internal or test.
*/
case IOV_QTXPOWER:{
u8 qdbm;
bool override;

/* Remove override bit and clip to max qdbm value */
qdbm = (u8)min_t(u32, (int_val & ~WL_TXPWR_OVERRIDE), 0xff);
/* Extract override setting */
override = (int_val & WL_TXPWR_OVERRIDE) ? true : false;
err =
wlc_phy_txpower_set(wlc->band->pi, qdbm, override);
break;
}
case IOV_MPC:
wlc->mpc = (bool)int_val;
brcms_c_radio_mpc_upd(wlc);
break;
default:
err = -ENOTSUPP;
}
return err;
}

int brcms_c_get_par(struct brcms_c_info *wlc, enum wlc_par_id par_id,
int *ret_int_ptr)
{
int err = 0;

switch (par_id) {
case IOV_BCN_LI_BCN:
*ret_int_ptr = wlc->bcn_li_bcn;
break;
case IOV_QTXPOWER: {
uint qdbm;
bool override;

err = wlc_phy_txpower_get(wlc->band->pi, &qdbm,
&override);
if (err != 0)
return err;

/* Return qdbm units */
*ret_int_ptr =
qdbm | (override ? WL_TXPWR_OVERRIDE : 0);
break;
}
case IOV_MPC:
*ret_int_ptr = (s32) wlc->mpc;
break;
default:
err = -ENOTSUPP;
}
return err;
}

/*
* Search the name=value vars for a specific one and return its value.
* Returns NULL if not found.
*/
char *getvar(char *vars, const char *name)
{
char *s;
int len;

if (!name)
return NULL;

len = strlen(name);
if (len == 0)
return NULL;

/* first look in vars[] */
for (s = vars; s && *s;) {
if ((memcmp(s, name, len) == 0) && (s[len] == '='))
return &s[len + 1];

while (*s++)
;
}
/* nothing found */
return NULL;
}

/*
* Search the vars for a specific one and return its value as
* an integer. Returns 0 if not found.
*/
int getintvar(char *vars, const char *name)
{
char *val;

val = getvar(vars, name);
if (val == NULL)
return 0;

return simple_strtoul(val, NULL, 0);
}