Re: [PATCH 012/196 ver2] nozomi driver

Frank Seidel
2008-01-25T12:44:45Z

From: Frank Seidel <fseidel@suse.de>

This is a driver to control the cardbus wireless data card that works on
3g networks.

Greg Kroah-Hartman <gregkh@suse.de> did the initial driver cleanup.
Thanks to Arnaud Patard <apatard@mandriva.com> for help with bugfixing.
Thanks to Alan Cox for a lot of tty fixes.
Thanks to Satyam Sharma <satyam@infradead.org> for fixing buildbreakage.
Thanks to Frank Seidel <fseidel@suse.de> for a lot of bugfixes and
rewriting to make it a sane Linux driver
Thanks to Jiri Slaby <jirislaby@gmail.com> for a lot bugfixes, cleanups
and rewrites that make it much more readable.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Frank Seidel <fseidel@suse.de>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
---
drivers/char/Kconfig | 10
drivers/char/Makefile | 1
drivers/char/nozomi.c | 1943 ++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1954 insertions(+)

--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -373,6 +373,16 @@ config ISTALLION
To compile this driver as a module, choose M here: the
module will be called istallion.

+config NOZOMI
+ tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
+ depends on PCI && EXPERIMENTAL
+ help
+ If you have a HSDPA driver Broadband Wireless Data Card -
+ Globe Trotter PCMCIA card, say Y here.
+
+ To compile this driver as a module, choose M here, the module
+ will be called nozomi.
+
config A2232
tristate "Commodore A2232 serial support (EXPERIMENTAL)"
depends on EXPERIMENTAL && ZORRO && BROKEN_ON_SMP
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_SERIAL167) += serial167.o
obj-$(CONFIG_CYCLADES) += cyclades.o
obj-$(CONFIG_STALLION) += stallion.o
obj-$(CONFIG_ISTALLION) += istallion.o
+obj-$(CONFIG_NOZOMI) += nozomi.o
obj-$(CONFIG_DIGIEPCA) += epca.o
obj-$(CONFIG_SPECIALIX) += specialix.o
obj-$(CONFIG_MOXA_INTELLIO) += moxa.o
--- /dev/null
+++ b/drivers/char/nozomi.c
@@ -0,0 +1,1943 @@
+/*
+ * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
+ *
+ * Written by: Ulf Jakobsson,
+ * Jan Åkerfeldt,
+ * Stefan Thomasson,
+ *
+ * Maintained by: Paul Hardwick (p.hardwick@option.com)
+ *
+ * Patches:
+ * Locking code changes for Vodafone by Sphere Systems Ltd,
+ * Andrew Bird (ajb@spheresystems.co.uk )
+ * & Phil Sanderson
+ *
+ * Source has been ported from an implementation made by Filip Aben @ Option
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Copyright (c) 2005,2006 Option Wireless Sweden AB
+ * Copyright (c) 2006 Sphere Systems Ltd
+ * Copyright (c) 2006 Option Wireless n/v
+ * All rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * --------------------------------------------------------------------------
+ */
+
+/* Enable this to have a lot of debug printouts */
+#define DEBUG
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/interrupt.h>
+#include <linux/kmod.h>
+#include <linux/init.h>
+#include <linux/kfifo.h>
+#include <linux/uaccess.h>
+#include <asm/byteorder.h>
+
+#include <linux/delay.h>
+
+
+#define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \
+ __DATE__ " " __TIME__ ")"
+
+/* Macros definitions */
+
+/* Default debug printout level */
+#define NOZOMI_DEBUG_LEVEL 0x00
+
+#define P_BUF_SIZE 128
+#define NFO(_err_flag_, args...) \
+do { \
+ char tmp[P_BUF_SIZE]; \
+ snprintf(tmp, sizeof(tmp), ##args); \
+ printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \
+ __FUNCTION__, tmp); \
+} while (0)
+
+#define DBG1(args...) D_(0x01, ##args)
+#define DBG2(args...) D_(0x02, ##args)
+#define DBG3(args...) D_(0x04, ##args)
+#define DBG4(args...) D_(0x08, ##args)
+#define DBG5(args...) D_(0x10, ##args)
+#define DBG6(args...) D_(0x20, ##args)
+#define DBG7(args...) D_(0x40, ##args)
+#define DBG8(args...) D_(0x80, ##args)
+
+#ifdef DEBUG
+/* Do we need this settable at runtime? */
+static int debug = NOZOMI_DEBUG_LEVEL;
+
+#define D(lvl, args...) do \
+ {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
+ while (0)
+#define D_(lvl, args...) D(lvl, ##args)
+
+/* These printouts are always printed */
+
+#else
+static int debug;
+#define D_(lvl, args...)
+#endif
+
+/* TODO: rewrite to optimize macros... */
+
+#define TMP_BUF_MAX 256
+
+#define DUMP(buf__,len__) \
+ do { \
+ char tbuf[TMP_BUF_MAX] = {0};\
+ if (len__ > 1) {\
+ snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
+ if (tbuf[len__-2] == '\r') {\
+ tbuf[len__-2] = 'r';\
+ } \
+ DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
+ } else {\
+ DBG1("SENDING: '%s' (%d)", tbuf, len__);\
+ } \
+} while (0)
+
+/* Defines */
+#define NOZOMI_NAME "nozomi"
+#define NOZOMI_NAME_TTY "nozomi_tty"
+#define DRIVER_DESC "Nozomi driver"
+
+#define NTTY_TTY_MAXMINORS 256
+#define NTTY_FIFO_BUFFER_SIZE 8192
+
+/* Must be power of 2 */
+#define FIFO_BUFFER_SIZE_UL 8192
+
+/* Size of tmp send buffer to card */
+#define SEND_BUF_MAX 1024
+#define RECEIVE_BUF_MAX 4
+
+
+/* Define all types of vendors and devices to support */
+#define VENDOR1 0x1931 /* Vendor Option */
+#define DEVICE1 0x000c /* HSDPA card */
+
+#define R_IIR 0x0000 /* Interrupt Identity Register */
+#define R_FCR 0x0000 /* Flow Control Register */
+#define R_IER 0x0004 /* Interrupt Enable Register */
+
+#define CONFIG_MAGIC 0xEFEFFEFE
+#define TOGGLE_VALID 0x0000
+
+/* Definition of interrupt tokens */
+#define MDM_DL1 0x0001
+#define MDM_UL1 0x0002
+#define MDM_DL2 0x0004
+#define MDM_UL2 0x0008
+#define DIAG_DL1 0x0010
+#define DIAG_DL2 0x0020
+#define DIAG_UL 0x0040
+#define APP1_DL 0x0080
+#define APP1_UL 0x0100
+#define APP2_DL 0x0200
+#define APP2_UL 0x0400
+#define CTRL_DL 0x0800
+#define CTRL_UL 0x1000
+#define RESET 0x8000
+
+#define MDM_DL (MDM_DL1 | MDM_DL2)
+#define MDM_UL (MDM_UL1 | MDM_UL2)
+#define DIAG_DL (DIAG_DL1 | DIAG_DL2)
+
+/* modem signal definition */
+#define CTRL_DSR 0x0001
+#define CTRL_DCD 0x0002
+#define CTRL_RI 0x0004
+#define CTRL_CTS 0x0008
+
+#define CTRL_DTR 0x0001
+#define CTRL_RTS 0x0002
+
+#define MAX_PORT 4
+#define NOZOMI_MAX_PORTS 5
+#define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT)
+
+/* Type definitions */
+
+/*
+ * There are two types of nozomi cards,
+ * one with 2048 memory and with 8192 memory
+ */
+enum card_type {
+ F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */
+ F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
+};
+
+/* Two different toggle channels exist */
+enum channel_type {
+ CH_A = 0,
+ CH_B = 1,
+};
+
+/* Port definition for the card regarding flow control */
+enum ctrl_port_type {
+ CTRL_CMD = 0,
+ CTRL_MDM = 1,
+ CTRL_DIAG = 2,
+ CTRL_APP1 = 3,
+ CTRL_APP2 = 4,
+ CTRL_ERROR = -1,
+};
+
+/* Ports that the nozomi has */
+enum port_type {
+ PORT_MDM = 0,
+ PORT_DIAG = 1,
+ PORT_APP1 = 2,
+ PORT_APP2 = 3,
+ PORT_CTRL = 4,
+ PORT_ERROR = -1,
+};
+
+#ifdef __BIG_ENDIAN
+/* Big endian */
+
+struct toggles {
+ unsigned int enabled:5; /*
+ * Toggle fields are valid if enabled is 0,
+ * else A-channels must always be used.
+ */
+ unsigned int diag_dl:1;
+ unsigned int mdm_dl:1;
+ unsigned int mdm_ul:1;
+} __attribute__ ((packed));
+
+/* Configuration table to read at startup of card */
+/* Is for now only needed during initialization phase */
+struct config_table {
+ u32 signature;
+ u16 product_information;
+ u16 version;
+ u8 pad3[3];
+ struct toggles toggle;
+ u8 pad1[4];
+ u16 dl_mdm_len1; /*
+ * If this is 64, it can hold
+ * 60 bytes + 4 that is length field
+ */
+ u16 dl_start;
+
+ u16 dl_diag_len1;
+ u16 dl_mdm_len2; /*
+ * If this is 64, it can hold
+ * 60 bytes + 4 that is length field
+ */
+ u16 dl_app1_len;
+
+ u16 dl_diag_len2;
+ u16 dl_ctrl_len;
+ u16 dl_app2_len;
+ u8 pad2[16];
+ u16 ul_mdm_len1;
+ u16 ul_start;
+ u16 ul_diag_len;
+ u16 ul_mdm_len2;
+ u16 ul_app1_len;
+ u16 ul_app2_len;
+ u16 ul_ctrl_len;
+} __attribute__ ((packed));
+
+/* This stores all control downlink flags */
+struct ctrl_dl {
+ u8 port;
+ unsigned int reserved:4;
+ unsigned int CTS:1;
+ unsigned int RI:1;
+ unsigned int DCD:1;
+ unsigned int DSR:1;
+} __attribute__ ((packed));
+
+/* This stores all control uplink flags */
+struct ctrl_ul {
+ u8 port;
+ unsigned int reserved:6;
+ unsigned int RTS:1;
+ unsigned int DTR:1;
+} __attribute__ ((packed));
+
+#else
+/* Little endian */
+
+/* This represents the toggle information */
+struct toggles {
+ unsigned int mdm_ul:1;
+ unsigned int mdm_dl:1;
+ unsigned int diag_dl:1;
+ unsigned int enabled:5; /*
+ * Toggle fields are valid if enabled is 0,
+ * else A-channels must always be used.
+ */
+} __attribute__ ((packed));
+
+/* Configuration table to read at startup of card */
+struct config_table {
+ u32 signature;
+ u16 version;
+ u16 product_information;
+ struct toggles toggle;
+ u8 pad1[7];
+ u16 dl_start;
+ u16 dl_mdm_len1; /*
+ * If this is 64, it can hold
+ * 60 bytes + 4 that is length field
+ */
+ u16 dl_mdm_len2;
+ u16 dl_diag_len1;
+ u16 dl_diag_len2;
+ u16 dl_app1_len;
+ u16 dl_app2_len;
+ u16 dl_ctrl_len;
+ u8 pad2[16];
+ u16 ul_start;
+ u16 ul_mdm_len2;
+ u16 ul_mdm_len1;
+ u16 ul_diag_len;
+ u16 ul_app1_len;
+ u16 ul_app2_len;
+ u16 ul_ctrl_len;
+} __attribute__ ((packed));
+
+/* This stores all control downlink flags */
+struct ctrl_dl {
+ unsigned int DSR:1;
+ unsigned int DCD:1;
+ unsigned int RI:1;
+ unsigned int CTS:1;
+ unsigned int reserverd:4;
+ u8 port;
+} __attribute__ ((packed));
+
+/* This stores all control uplink flags */
+struct ctrl_ul {
+ unsigned int DTR:1;
+ unsigned int RTS:1;
+ unsigned int reserved:6;
+ u8 port;
+} __attribute__ ((packed));
+#endif
+
+/* This holds all information that is needed regarding a port */
+struct port {
+ u8 update_flow_control;
+ struct ctrl_ul ctrl_ul;
+ struct ctrl_dl ctrl_dl;
+ struct kfifo *fifo_ul;
+ void __iomem *dl_addr[2];
+ u32 dl_size[2];
+ u8 toggle_dl;
+ void __iomem *ul_addr[2];
+ u32 ul_size[2];
+ u8 toggle_ul;
+ u16 token_dl;
+
+ struct tty_struct *tty;
+ int tty_open_count;
+ /* mutex to ensure one access patch to this port */
+ struct mutex tty_sem;
+ wait_queue_head_t tty_wait;
+ struct async_icount tty_icount;
+};
+
+/* Private data one for each card in the system */
+struct nozomi {
+ void __iomem *base_addr;
+ unsigned long flip;
+
+ /* Pointers to registers */
+ void __iomem *reg_iir;
+ void __iomem *reg_fcr;
+ void __iomem *reg_ier;
+
+ u16 last_ier;
+ enum card_type card_type;
+ struct config_table config_table; /* Configuration table */
+ struct pci_dev *pdev;
+ struct port port[NOZOMI_MAX_PORTS];
+ u8 *send_buf;
+
+ spinlock_t spin_mutex; /* secures access to registers and tty */
+
+ unsigned int index_start;
+ u32 open_ttys;
+};
+
+/* This is a data packet that is read or written to/from card */
+struct buffer {
+ u32 size; /* size is the length of the data buffer */
+ u8 *data;
+} __attribute__ ((packed));
+
+/* Global variables */
+static struct pci_device_id nozomi_pci_tbl[] = {
+ {PCI_DEVICE(VENDOR1, DEVICE1)},
+ {},
+};
+
+MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
+
+static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
+static struct tty_driver *ntty_driver;
+
+/*
+ * find card by tty_index
+ */
+static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
+{
+ return tty ? ndevs[tty->index / MAX_PORT] : NULL;
+}
+
+static inline struct port *get_port_by_tty(const struct tty_struct *tty)
+{
+ struct nozomi *ndev = get_dc_by_tty(tty);
+ return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
+}
+
+/*
+ * TODO:
+ * -Optimize
+ * -Rewrite cleaner
+ */
+
+static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
+ u32 size_bytes)
+{
+ u32 i = 0;
+ const u32 *ptr = (__force u32 *) mem_addr_start;
+ u16 *buf16;
+
+ if (unlikely(!ptr || !buf))
+ goto out;
+
+ /* shortcut for extremely often used cases */
+ switch (size_bytes) {
+ case 2: /* 2 bytes */
+ buf16 = (u16 *) buf;
+ *buf16 = __le16_to_cpu(readw((void __iomem *)ptr));
+ goto out;
+ break;
+ case 4: /* 4 bytes */
+ *(buf) = __le32_to_cpu(readl((void __iomem *)ptr));
+ goto out;
+ break;
+ }
+
+ while (i < size_bytes) {
+ if (size_bytes - i == 2) {
+ /* Handle 2 bytes in the end */
+ buf16 = (u16 *) buf;
+ *(buf16) = __le16_to_cpu(readw((void __iomem *)ptr));
+ i += 2;
+ } else {
+ /* Read 4 bytes */
+ *(buf) = __le32_to_cpu(readl((void __iomem *)ptr));
+ i += 4;
+ }
+ buf++;
+ ptr++;
+ }
+out:
+ return;
+}
+
+/*
+ * TODO:
+ * -Optimize
+ * -Rewrite cleaner
+ */
+static u32 write_mem32(void __iomem *mem_addr_start, u32 *buf,
+ u32 size_bytes)
+{
+ u32 i = 0;
+ u32 *ptr = (__force u32 *) mem_addr_start;
+ u16 *buf16;
+
+ if (unlikely(!ptr || !buf))
+ return 0;
+
+ /* shortcut for extremely often used cases */
+ switch (size_bytes) {
+ case 2: /* 2 bytes */
+ buf16 = (u16 *) buf;
+ writew(__cpu_to_le16(*buf16), (void __iomem *)ptr);
+ return 2;
+ break;
+ case 1: /*
+ * also needs to write 4 bytes in this case
+ * so falling through..
+ */
+ case 4: /* 4 bytes */
+ writel(__cpu_to_le32(*buf), (void __iomem *)ptr);
+ return 4;
+ break;
+ }
+
+ while (i < size_bytes) {
+ if (size_bytes - i == 2) {
+ /* 2 bytes */
+ buf16 = (u16 *) buf;
+ writew(__cpu_to_le16(*buf16), (void __iomem *)ptr);
+ i += 2;
+ } else {
+ /* 4 bytes */
+ writel(__cpu_to_le32(*buf), (void __iomem *)ptr);
+ i += 4;
+ }
+ buf++;
+ ptr++;
+ }
+ return i;
+}
+
+/* Setup pointers to different channels and also setup buffer sizes. */
+static void setup_memory(struct nozomi *dc)
+{
+ void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
+ /* The length reported is including the length field of 4 bytes,
+ * hence subtract with 4.
+ */
+ const u16 buff_offset = 4;
+
+ /* Modem port dl configuration */
+ dc->port[PORT_MDM].dl_addr[CH_A] = offset;
+ dc->port[PORT_MDM].dl_addr[CH_B] =
+ (offset += dc->config_table.dl_mdm_len1);
+ dc->port[PORT_MDM].dl_size[CH_A] =
+ dc->config_table.dl_mdm_len1 - buff_offset;
+ dc->port[PORT_MDM].dl_size[CH_B] =
+ dc->config_table.dl_mdm_len2 - buff_offset;
+
+ /* Diag port dl configuration */
+ dc->port[PORT_DIAG].dl_addr[CH_A] =
+ (offset += dc->config_table.dl_mdm_len2);
+ dc->port[PORT_DIAG].dl_size[CH_A] =
+ dc->config_table.dl_diag_len1 - buff_offset;
+ dc->port[PORT_DIAG].dl_addr[CH_B] =
+ (offset += dc->config_table.dl_diag_len1);
+ dc->port[PORT_DIAG].dl_size[CH_B] =
+ dc->config_table.dl_diag_len2 - buff_offset;
+
+ /* App1 port dl configuration */
+ dc->port[PORT_APP1].dl_addr[CH_A] =
+ (offset += dc->config_table.dl_diag_len2);
+ dc->port[PORT_APP1].dl_size[CH_A] =
+ dc->config_table.dl_app1_len - buff_offset;
+
+ /* App2 port dl configuration */
+ dc->port[PORT_APP2].dl_addr[CH_A] =
+ (offset += dc->config_table.dl_app1_len);
+ dc->port[PORT_APP2].dl_size[CH_A] =
+ dc->config_table.dl_app2_len - buff_offset;
+
+ /* Ctrl dl configuration */
+ dc->port[PORT_CTRL].dl_addr[CH_A] =
+ (offset += dc->config_table.dl_app2_len);
+ dc->port[PORT_CTRL].dl_size[CH_A] =
+ dc->config_table.dl_ctrl_len - buff_offset;
+
+ offset = dc->base_addr + dc->config_table.ul_start;
+
+ /* Modem Port ul configuration */
+ dc->port[PORT_MDM].ul_addr[CH_A] = offset;
+ dc->port[PORT_MDM].ul_size[CH_A] =
+ dc->config_table.ul_mdm_len1 - buff_offset;
+ dc->port[PORT_MDM].ul_addr[CH_B] =
+ (offset += dc->config_table.ul_mdm_len1);
+ dc->port[PORT_MDM].ul_size[CH_B] =
+ dc->config_table.ul_mdm_len2 - buff_offset;
+
+ /* Diag port ul configuration */
+ dc->port[PORT_DIAG].ul_addr[CH_A] =
+ (offset += dc->config_table.ul_mdm_len2);
+ dc->port[PORT_DIAG].ul_size[CH_A] =
+ dc->config_table.ul_diag_len - buff_offset;
+
+ /* App1 port ul configuration */
+ dc->port[PORT_APP1].ul_addr[CH_A] =
+ (offset += dc->config_table.ul_diag_len);
+ dc->port[PORT_APP1].ul_size[CH_A] =
+ dc->config_table.ul_app1_len - buff_offset;
+
+ /* App2 port ul configuration */
+ dc->port[PORT_APP2].ul_addr[CH_A] =
+ (offset += dc->config_table.ul_app1_len);
+ dc->port[PORT_APP2].ul_size[CH_A] =
+ dc->config_table.ul_app2_len - buff_offset;
+
+ /* Ctrl ul configuration */
+ dc->port[PORT_CTRL].ul_addr[CH_A] =
+ (offset += dc->config_table.ul_app2_len);
+ dc->port[PORT_CTRL].ul_size[CH_A] =
+ dc->config_table.ul_ctrl_len - buff_offset;
+}
+
+/* Dump config table under initalization phase */
+#ifdef DEBUG
+static void dump_table(const struct nozomi *dc)
+{
+ DBG3("signature: 0x%08X", dc->config_table.signature);
+ DBG3("version: 0x%04X", dc->config_table.version);
+ DBG3("product_information: 0x%04X", \
+ dc->config_table.product_information);
+ DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
+ DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
+ DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
+ DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
+
+ DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
+ DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
+ dc->config_table.dl_mdm_len1);
+ DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
+ dc->config_table.dl_mdm_len2);
+ DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
+ dc->config_table.dl_diag_len1);
+ DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
+ dc->config_table.dl_diag_len2);
+ DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
+ dc->config_table.dl_app1_len);
+ DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
+ dc->config_table.dl_app2_len);
+ DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
+ dc->config_table.dl_ctrl_len);
+ DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
+ dc->config_table.ul_start);
+ DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
+ dc->config_table.ul_mdm_len1);
+ DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
+ dc->config_table.ul_mdm_len2);
+ DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
+ dc->config_table.ul_diag_len);
+ DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
+ dc->config_table.ul_app1_len);
+ DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
+ dc->config_table.ul_app2_len);
+ DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
+ dc->config_table.ul_ctrl_len);
+}
+#else
+static inline void dump_table(const struct nozomi *dc) { }
+#endif
+
+/*
+ * Read configuration table from card under intalization phase
+ * Returns 1 if ok, else 0
+ */
+static int nozomi_read_config_table(struct nozomi *dc)
+{
+ read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
+ sizeof(struct config_table));
+
+ if (dc->config_table.signature != CONFIG_MAGIC) {
+ dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
+ dc->config_table.signature, CONFIG_MAGIC);
+ return 0;
+ }
+
+ if ((dc->config_table.version == 0)
+ || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
+ int i;
+ DBG1("Second phase, configuring card");
+
+ setup_memory(dc);
+
+ dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
+ dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
+ dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
+ DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
+ dc->port[PORT_MDM].toggle_ul,
+ dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
+
+ dump_table(dc);
+
+ for (i = PORT_MDM; i < MAX_PORT; i++) {
+ dc->port[i].fifo_ul =
+ kfifo_alloc(FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL);
+ memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
+ memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
+ }
+
+ /* Enable control channel */
+ dc->last_ier = dc->last_ier | CTRL_DL;
+ writew(dc->last_ier, dc->reg_ier);
+
+ dev_info(&dc->pdev->dev, "Initialization OK!\n");
+ return 1;
+ }
+
+ if ((dc->config_table.version > 0)
+ && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
+ u32 offset = 0;
+ DBG1("First phase: pushing upload buffers, clearing download");
+
+ dev_info(&dc->pdev->dev, "Version of card: %d\n",
+ dc->config_table.version);
+
+ /* Here we should disable all I/O over F32. */
+ setup_memory(dc);
+
+ /*
+ * We should send ALL channel pair tokens back along
+ * with reset token
+ */
+
+ /* push upload modem buffers */
+ write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
+ (u32 *) &offset, 4);
+ write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
+ (u32 *) &offset, 4);
+
+ writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
+
+ DBG1("First phase done");
+ }
+
+ return 1;
+}
+
+/* Enable uplink interrupts */
+static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
+{
+ u16 mask[NOZOMI_MAX_PORTS] = \
+ {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
+
+ if (port < NOZOMI_MAX_PORTS) {
+ dc->last_ier |= mask[port];
+ writew(dc->last_ier, dc->reg_ier);
+ } else {
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ }
+}
+
+/* Disable uplink interrupts */
+static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
+{
+ u16 mask[NOZOMI_MAX_PORTS] = \
+ {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
+
+ if (port < NOZOMI_MAX_PORTS) {
+ dc->last_ier &= mask[port];
+ writew(dc->last_ier, dc->reg_ier);
+ } else {
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ }
+}
+
+/* Enable downlink interrupts */
+static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
+{
+ u16 mask[NOZOMI_MAX_PORTS] = \
+ {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
+
+ if (port < NOZOMI_MAX_PORTS) {
+ dc->last_ier |= mask[port];
+ writew(dc->last_ier, dc->reg_ier);
+ } else {
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ }
+}
+
+/* Disable downlink interrupts */
+static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
+{
+ u16 mask[NOZOMI_MAX_PORTS] = \
+ {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
+
+ if (port < NOZOMI_MAX_PORTS) {
+ dc->last_ier &= mask[port];
+ writew(dc->last_ier, dc->reg_ier);
+ } else {
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ }
+}
+
+/*
+ * Return 1 - send buffer to card and ack.
+ * Return 0 - don't ack, don't send buffer to card.
+ */
+static int send_data(enum port_type index, struct nozomi *dc)
+{
+ u32 size = 0;
+ struct port *port = &dc->port[index];
+ u8 toggle = port->toggle_ul;
+ void __iomem *addr = port->ul_addr[toggle];
+ u32 ul_size = port->ul_size[toggle];
+ struct tty_struct *tty = port->tty;
+
+ /* Get data from tty and place in buf for now */
+ size = __kfifo_get(port->fifo_ul, dc->send_buf,
+ ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
+
+ if (size == 0) {
+ DBG4("No more data to send, disable link:");
+ return 0;
+ }
+
+ /* DUMP(buf, size); */
+
+ /* Write length + data */
+ write_mem32(addr, (u32 *) &size, 4);
+ write_mem32(addr + 4, (u32 *) dc->send_buf, size);
+
+ if (tty)
+ tty_wakeup(tty);
+
+ return 1;
+}
+
+/* If all data has been read, return 1, else 0 */
+static int receive_data(enum port_type index, struct nozomi *dc)
+{
+ u8 buf[RECEIVE_BUF_MAX] = { 0 };
+ int size;
+ u32 offset = 4;
+ struct port *port = &dc->port[index];
+ void __iomem *addr = port->dl_addr[port->toggle_dl];
+ struct tty_struct *tty = port->tty;
+ int i;
+
+ if (unlikely(!tty)) {
+ DBG1("tty not open for port: %d?", index);
+ return 1;
+ }
+
+ read_mem32((u32 *) &size, addr, 4);
+ /* DBG1( "%d bytes port: %d", size, index); */
+
+ if (test_bit(TTY_THROTTLED, &tty->flags)) {
+ DBG1("No room in tty, don't read data, don't ack interrupt, "
+ "disable interrupt");
+
+ /* disable interrupt in downlink... */
+ disable_transmit_dl(index, dc);
+ return 0;
+ }
+
+ if (unlikely(size == 0)) {
+ dev_err(&dc->pdev->dev, "size == 0?\n");
+ return 1;
+ }
+
+ tty_buffer_request_room(tty, size);
+
+ while (size > 0) {
+ read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
+
+ if (size == 1) {
+ tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
+ size = 0;
+ } else if (size < RECEIVE_BUF_MAX) {
+ size -= tty_insert_flip_string(tty, (char *) buf, size);
+ } else {
+ i = tty_insert_flip_string(tty, \
+ (char *) buf, RECEIVE_BUF_MAX);
+ size -= i;
+ offset += i;
+ }
+ }
+
+ set_bit(index, &dc->flip);
+
+ return 1;
+}
+
+/* Debug for interrupts */
+#ifdef DEBUG
+static char *interrupt2str(u16 interrupt)
+{
+ static char buf[TMP_BUF_MAX];
+ char *p = buf;
+
+ interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
+ interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "MDM_DL2 ") : NULL;
+
+ interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "MDM_UL1 ") : NULL;
+ interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "MDM_UL2 ") : NULL;
+
+ interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "DIAG_DL1 ") : NULL;
+ interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "DIAG_DL2 ") : NULL;
+
+ interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "DIAG_UL ") : NULL;
+
+ interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "APP1_DL ") : NULL;
+ interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "APP2_DL ") : NULL;
+
+ interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "APP1_UL ") : NULL;
+ interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "APP2_UL ") : NULL;
+
+ interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "CTRL_DL ") : NULL;
+ interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "CTRL_UL ") : NULL;
+
+ interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "RESET ") : NULL;
+
+ return buf;
+}
+#endif
+
+/*
+ * Receive flow control
+ * Return 1 - If ok, else 0
+ */
+static int receive_flow_control(struct nozomi *dc)
+{
+ enum port_type port = PORT_MDM;
+ struct ctrl_dl ctrl_dl;
+ struct ctrl_dl old_ctrl;
+ u16 enable_ier = 0;
+
+ read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
+
+ switch (ctrl_dl.port) {
+ case CTRL_CMD:
+ DBG1("The Base Band sends this value as a response to a "
+ "request for IMSI detach sent over the control "
+ "channel uplink (see section 7.6.1).");
+ break;
+ case CTRL_MDM:
+ port = PORT_MDM;
+ enable_ier = MDM_DL;
+ break;
+ case CTRL_DIAG:
+ port = PORT_DIAG;
+ enable_ier = DIAG_DL;
+ break;
+ case CTRL_APP1:
+ port = PORT_APP1;
+ enable_ier = APP1_DL;
+ break;
+ case CTRL_APP2:
+ port = PORT_APP2;
+ enable_ier = APP2_DL;
+ break;
+ default:
+ dev_err(&dc->pdev->dev,
+ "ERROR: flow control received for non-existing port\n");
+ return 0;
+ };
+
+ DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
+ *((u16 *)&ctrl_dl));
+
+ old_ctrl = dc->port[port].ctrl_dl;
+ dc->port[port].ctrl_dl = ctrl_dl;
+
+ if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
+ DBG1("Disable interrupt (0x%04X) on port: %d",
+ enable_ier, port);
+ disable_transmit_ul(port, dc);
+
+ } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
+
+ if (__kfifo_len(dc->port[port].fifo_ul)) {
+ DBG1("Enable interrupt (0x%04X) on port: %d",
+ enable_ier, port);
+ DBG1("Data in buffer [%d], enable transmit! ",
+ __kfifo_len(dc->port[port].fifo_ul));
+ enable_transmit_ul(port, dc);
+ } else {
+ DBG1("No data in buffer...");
+ }
+ }
+
+ if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
+ DBG1(" No change in mctrl");
+ return 1;
+ }
+ /* Update statistics */
+ if (old_ctrl.CTS != ctrl_dl.CTS)
+ dc->port[port].tty_icount.cts++;
+ if (old_ctrl.DSR != ctrl_dl.DSR)
+ dc->port[port].tty_icount.dsr++;
+ if (old_ctrl.RI != ctrl_dl.RI)
+ dc->port[port].tty_icount.rng++;
+ if (old_ctrl.DCD != ctrl_dl.DCD)
+ dc->port[port].tty_icount.dcd++;
+
+ wake_up_interruptible(&dc->port[port].tty_wait);
+
+ DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
+ port,
+ dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
+ dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
+
+ return 1;
+}
+
+static enum ctrl_port_type port2ctrl(enum port_type port,
+ const struct nozomi *dc)
+{
+ switch (port) {
+ case PORT_MDM:
+ return CTRL_MDM;
+ case PORT_DIAG:
+ return CTRL_DIAG;
+ case PORT_APP1:
+ return CTRL_APP1;
+ case PORT_APP2:
+ return CTRL_APP2;
+ default:
+ dev_err(&dc->pdev->dev,
+ "ERROR: send flow control " \
+ "received for non-existing port\n");
+ };
+ return CTRL_ERROR;
+}
+
+/*
+ * Send flow control, can only update one channel at a time
+ * Return 0 - If we have updated all flow control
+ * Return 1 - If we need to update more flow control, ack current enable more
+ */
+static int send_flow_control(struct nozomi *dc)
+{
+ u32 i, more_flow_control_to_be_updated = 0;
+ u16 *ctrl;
+
+ for (i = PORT_MDM; i < MAX_PORT; i++) {
+ if (dc->port[i].update_flow_control) {
+ if (more_flow_control_to_be_updated) {
+ /* We have more flow control to be updated */
+ return 1;
+ }
+ dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
+ ctrl = (u16 *)&dc->port[i].ctrl_ul;
+ write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
+ (u32 *) ctrl, 2);
+ dc->port[i].update_flow_control = 0;
+ more_flow_control_to_be_updated = 1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Handle downlink data, ports that are handled are modem and diagnostics
+ * Return 1 - ok
+ * Return 0 - toggle fields are out of sync
+ */
+static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
+ u16 read_iir, u16 mask1, u16 mask2)
+{
+ if (*toggle == 0 && read_iir & mask1) {
+ if (receive_data(port, dc)) {
+ writew(mask1, dc->reg_fcr);
+ *toggle = !(*toggle);
+ }
+
+ if (read_iir & mask2) {
+ if (receive_data(port, dc)) {
+ writew(mask2, dc->reg_fcr);
+ *toggle = !(*toggle);
+ }
+ }
+ } else if (*toggle == 1 && read_iir & mask2) {
+ if (receive_data(port, dc)) {
+ writew(mask2, dc->reg_fcr);
+ *toggle = !(*toggle);
+ }
+
+ if (read_iir & mask1) {
+ if (receive_data(port, dc)) {
+ writew(mask1, dc->reg_fcr);
+ *toggle = !(*toggle);
+ }
+ }
+ } else {
+ dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
+ *toggle);
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * Handle uplink data, this is currently for the modem port
+ * Return 1 - ok
+ * Return 0 - toggle field are out of sync
+ */
+static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
+{
+ u8 *toggle = &(dc->port[port].toggle_ul);
+
+ if (*toggle == 0 && read_iir & MDM_UL1) {
+ dc->last_ier &= ~MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(port, dc)) {
+ writew(MDM_UL1, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ *toggle = !*toggle;
+ }
+
+ if (read_iir & MDM_UL2) {
+ dc->last_ier &= ~MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(port, dc)) {
+ writew(MDM_UL2, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ *toggle = !*toggle;
+ }
+ }
+
+ } else if (*toggle == 1 && read_iir & MDM_UL2) {
+ dc->last_ier &= ~MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(port, dc)) {
+ writew(MDM_UL2, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ *toggle = !*toggle;
+ }
+
+ if (read_iir & MDM_UL1) {
+ dc->last_ier &= ~MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(port, dc)) {
+ writew(MDM_UL1, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ *toggle = !*toggle;
+ }
+ }
+ } else {
+ writew(read_iir & MDM_UL, dc->reg_fcr);
+ dev_err(&dc->pdev->dev, "port out of sync!\n");
+ return 0;
+ }
+ return 1;
+}
+
+static irqreturn_t interrupt_handler(int irq, void *dev_id)
+{
+ struct nozomi *dc = dev_id;
+ unsigned int a;
+ u16 read_iir;
+
+ if (!dc)
+ return IRQ_NONE;
+
+ spin_lock(&dc->spin_mutex);
+ read_iir = readw(dc->reg_iir);
+
+ /* Card removed */
+ if (read_iir == (u16)-1)
+ goto none;
+ /*
+ * Just handle interrupt enabled in IER
+ * (by masking with dc->last_ier)
+ */
+ read_iir &= dc->last_ier;
+
+ if (read_iir == 0)
+ goto none;
+
+
+ DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
+ dc->last_ier);
+
+ if (read_iir & RESET) {
+ if (unlikely(!nozomi_read_config_table(dc))) {
+ dc->last_ier = 0x0;
+ writew(dc->last_ier, dc->reg_ier);
+ dev_err(&dc->pdev->dev, "Could not read status from "
+ "card, we should disable interface\n");
+ } else {
+ writew(RESET, dc->reg_fcr);
+ }
+ /* No more useful info if this was the reset interrupt. */
+ goto exit_handler;
+ }
+ if (read_iir & CTRL_UL) {
+ DBG1("CTRL_UL");
+ dc->last_ier &= ~CTRL_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_flow_control(dc)) {
+ writew(CTRL_UL, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | CTRL_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ }
+ }
+ if (read_iir & CTRL_DL) {
+ receive_flow_control(dc);
+ writew(CTRL_DL, dc->reg_fcr);
+ }
+ if (read_iir & MDM_DL) {
+ if (!handle_data_dl(dc, PORT_MDM,
+ &(dc->port[PORT_MDM].toggle_dl), read_iir,
+ MDM_DL1, MDM_DL2)) {
+ dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
+ goto exit_handler;
+ }
+ }
+ if (read_iir & MDM_UL) {
+ if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
+ dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
+ goto exit_handler;
+ }
+ }
+ if (read_iir & DIAG_DL) {
+ if (!handle_data_dl(dc, PORT_DIAG,
+ &(dc->port[PORT_DIAG].toggle_dl), read_iir,
+ DIAG_DL1, DIAG_DL2)) {
+ dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
+ goto exit_handler;
+ }
+ }
+ if (read_iir & DIAG_UL) {
+ dc->last_ier &= ~DIAG_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(PORT_DIAG, dc)) {
+ writew(DIAG_UL, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | DIAG_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ }
+ }
+ if (read_iir & APP1_DL) {
+ if (receive_data(PORT_APP1, dc))
+ writew(APP1_DL, dc->reg_fcr);
+ }
+ if (read_iir & APP1_UL) {
+ dc->last_ier &= ~APP1_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(PORT_APP1, dc)) {
+ writew(APP1_UL, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | APP1_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ }
+ }
+ if (read_iir & APP2_DL) {
+ if (receive_data(PORT_APP2, dc))
+ writew(APP2_DL, dc->reg_fcr);
+ }
+ if (read_iir & APP2_UL) {
+ dc->last_ier &= ~APP2_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(PORT_APP2, dc)) {
+ writew(APP2_UL, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | APP2_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ }
+ }
+
+exit_handler:
+ spin_unlock(&dc->spin_mutex);
+ for (a = 0; a < NOZOMI_MAX_PORTS; a++)
+ if (test_and_clear_bit(a, &dc->flip))
+ tty_flip_buffer_push(dc->port[a].tty);
+ return IRQ_HANDLED;
+none:
+ spin_unlock(&dc->spin_mutex);
+ return IRQ_NONE;
+}
+
+static void nozomi_get_card_type(struct nozomi *dc)
+{
+ int i;
+ u32 size = 0;
+
+ for (i = 0; i < 6; i++)
+ size += pci_resource_len(dc->pdev, i);
+
+ /* Assume card type F32_8 if no match */
+ dc->card_type = size == 2048 ? F32_2 : F32_8;
+
+ dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
+}
+
+static void nozomi_setup_private_data(struct nozomi *dc)
+{
+ void __iomem *offset = dc->base_addr + dc->card_type / 2;
+ unsigned int i;
+
+ dc->reg_fcr = (void __iomem *)(offset + R_FCR);
+ dc->reg_iir = (void __iomem *)(offset + R_IIR);
+ dc->reg_ier = (void __iomem *)(offset + R_IER);
+ dc->last_ier = 0;
+ dc->flip = 0;
+
+ dc->port[PORT_MDM].token_dl = MDM_DL;
+ dc->port[PORT_DIAG].token_dl = DIAG_DL;
+ dc->port[PORT_APP1].token_dl = APP1_DL;
+ dc->port[PORT_APP2].token_dl = APP2_DL;
+
+ for (i = 0; i < MAX_PORT; i++)
+ init_waitqueue_head(&dc->port[i].tty_wait);
+}
+
+static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
+
+ return sprintf(buf, "%d\n", dc->card_type);
+}
+static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
+
+static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
+
+ return sprintf(buf, "%u\n", dc->open_ttys);
+}
+static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
+
+static void make_sysfs_files(struct nozomi *dc)
+{
+ if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
+ dev_err(&dc->pdev->dev,
+ "Could not create sysfs file for card_type\n");
+ if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
+ dev_err(&dc->pdev->dev,
+ "Could not create sysfs file for open_ttys\n");
+}
+
+static void remove_sysfs_files(struct nozomi *dc)
+{
+ device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
+ device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
+}
+
+/* Allocate memory for one device */
+static int __devinit nozomi_card_init(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ resource_size_t start;
+ int ret;
+ struct nozomi *dc = NULL;
+ int ndev_idx;
+ int i;
+
+ dev_dbg(&pdev->dev, "Init, new card found\n");
+
+ for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
+ if (!ndevs[ndev_idx])
+ break;
+
+ if (ndev_idx >= ARRAY_SIZE(ndevs)) {
+ dev_err(&pdev->dev, "no free tty range for this card left\n");
+ ret = -EIO;
+ goto err;
+ }
+
+ dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
+ if (unlikely(!dc)) {
+ dev_err(&pdev->dev, "Could not allocate memory\n");
+ ret = -ENOMEM;
+ goto err_free;
+ }
+
+ dc->pdev = pdev;
+
+ /* Find out what card type it is */
+ nozomi_get_card_type(dc);
+
+ ret = pci_enable_device(dc->pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to enable PCI Device\n");
+ goto err_free;
+ }
+
+ start = pci_resource_start(dc->pdev, 0);
+ if (start == 0) {
+ dev_err(&pdev->dev, "No I/O address for card detected\n");
+ ret = -ENODEV;
+ goto err_disable_device;
+ }
+
+ ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
+ if (ret) {
+ dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
+ (int) /* nozomi_private.io_addr */ 0);
+ goto err_disable_device;
+ }
+
+ dc->base_addr = ioremap(start, dc->card_type);
+ if (!dc->base_addr) {
+ dev_err(&pdev->dev, "Unable to map card MMIO\n");
+ ret = -ENODEV;
+ goto err_rel_regs;
+ }
+
+ dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
+ if (!dc->send_buf) {
+ dev_err(&pdev->dev, "Could not allocate send buffer?\n");
+ ret = -ENOMEM;
+ goto err_free_sbuf;
+ }
+
+ spin_lock_init(&dc->spin_mutex);
+
+ nozomi_setup_private_data(dc);
+
+ /* Disable all interrupts */
+ dc->last_ier = 0;
+ writew(dc->last_ier, dc->reg_ier);
+
+ ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
+ NOZOMI_NAME, dc);
+ if (unlikely(ret)) {
+ dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
+ goto err_free_sbuf;
+ }
+
+ DBG1("base_addr: %p", dc->base_addr);
+
+ make_sysfs_files(dc);
+
+ dc->index_start = ndev_idx * MAX_PORT;
+ ndevs[ndev_idx] = dc;
+
+ for (i = 0; i < MAX_PORT; i++) {
+ mutex_init(&dc->port[i].tty_sem);
+ dc->port[i].tty_open_count = 0;
+ dc->port[i].tty = NULL;
+ tty_register_device(ntty_driver, dc->index_start + i,
+ &pdev->dev);
+ }
+
+ /* Enable RESET interrupt. */
+ dc->last_ier = RESET;
+ writew(dc->last_ier, dc->reg_ier);
+
+ pci_set_drvdata(pdev, dc);
+
+ return 0;
+
+err_free_sbuf:
+ kfree(dc->send_buf);
+ iounmap(dc->base_addr);
+err_rel_regs:
+ pci_release_regions(pdev);
+err_disable_device:
+ pci_disable_device(pdev);
+err_free:
+ kfree(dc);
+err:
+ return ret;
+}
+
+static void __devexit tty_exit(struct nozomi *dc)
+{
+ unsigned int i;
+
+ DBG1(" ");
+
+ flush_scheduled_work();
+
+ for (i = 0; i < MAX_PORT; ++i)
+ if (dc->port[i].tty && \
+ list_empty(&dc->port[i].tty->hangup_work.entry))
+ tty_hangup(dc->port[i].tty);
+
+ while (dc->open_ttys)
+ msleep(1);
+
+ for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
+ tty_unregister_device(ntty_driver, i);
+}
+
+/* Deallocate memory for one device */
+static void __devexit nozomi_card_exit(struct pci_dev *pdev)
+{
+ int i;
+ struct ctrl_ul ctrl;
+ struct nozomi *dc = pci_get_drvdata(pdev);
+
+ /* Disable all interrupts */
+ dc->last_ier = 0;
+ writew(dc->last_ier, dc->reg_ier);
+
+ tty_exit(dc);
+
+ /* Send 0x0001, command card to resend the reset token. */
+ /* This is to get the reset when the module is reloaded. */
+ ctrl.port = 0x00;
+ ctrl.reserved = 0;
+ ctrl.RTS = 0;
+ ctrl.DTR = 1;
+ DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
+
+ /* Setup dc->reg addresses to we can use defines here */
+ write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
+ writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */
+
+ remove_sysfs_files(dc);
+
+ free_irq(pdev->irq, dc);
+
+ for (i = 0; i < MAX_PORT; i++)
+ if (dc->port[i].fifo_ul)
+ kfifo_free(dc->port[i].fifo_ul);
+
+ kfree(dc->send_buf);
+
+ iounmap(dc->base_addr);
+
+ pci_release_regions(pdev);
+
+ pci_disable_device(pdev);
+
+ ndevs[dc->index_start / MAX_PORT] = NULL;
+
+ kfree(dc);
+}
+
+static void set_rts(const struct tty_struct *tty, int rts)
+{
+ struct port *port = get_port_by_tty(tty);
+
+ port->ctrl_ul.RTS = rts;
+ port->update_flow_control = 1;
+ enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
+}
+
+static void set_dtr(const struct tty_struct *tty, int dtr)
+{
+ struct port *port = get_port_by_tty(tty);
+
+ DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
+
+ port->ctrl_ul.DTR = dtr;
+ port->update_flow_control = 1;
+ enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
+}
+
+/*
+ * ----------------------------------------------------------------------------
+ * TTY code
+ * ----------------------------------------------------------------------------
+ */
+
+/* Called when the userspace process opens the tty, /dev/noz*. */
+static int ntty_open(struct tty_struct *tty, struct file *file)
+{
+ struct port *port = get_port_by_tty(tty);
+ struct nozomi *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ if (!port || !dc)
+ return -ENODEV;
+
+ if (mutex_lock_interruptible(&port->tty_sem))
+ return -ERESTARTSYS;
+
+ port->tty_open_count++;
+ dc->open_ttys++;
+
+ /* Enable interrupt downlink for channel */
+ if (port->tty_open_count == 1) {
+ tty->low_latency = 1;
+ tty->driver_data = port;
+ port->tty = tty;
+ DBG1("open: %d", port->token_dl);
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ dc->last_ier = dc->last_ier | port->token_dl;
+ writew(dc->last_ier, dc->reg_ier);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ }
+
+ mutex_unlock(&port->tty_sem);
+
+ return 0;
+}
+
+/* Called when the userspace process close the tty, /dev/noz*. */
+static void ntty_close(struct tty_struct *tty, struct file *file)
+{
+ struct nozomi *dc = get_dc_by_tty(tty);
+ struct port *port = tty->driver_data;
+ unsigned long flags;
+
+ if (!dc || !port)
+ return;
+
+ if (mutex_lock_interruptible(&port->tty_sem))
+ return;
+
+ if (!port->tty_open_count)
+ goto exit;
+
+ dc->open_ttys--;
+ port->tty_open_count--;
+
+ if (port->tty_open_count == 0) {
+ DBG1("close: %d", port->token_dl);
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ dc->last_ier &= ~(port->token_dl);
+ writew(dc->last_ier, dc->reg_ier);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ }
+
+exit:
+ mutex_unlock(&port->tty_sem);
+}
+
+/*
+ * called when the userspace process writes to the tty (/dev/noz*).
+ * Data is inserted into a fifo, which is then read and transfered to the modem.
+ */
+static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
+ int count)
+{
+ int rval = -EINVAL;
+ struct nozomi *dc = get_dc_by_tty(tty);
+ struct port *port = tty->driver_data;
+ unsigned long flags;
+
+ /* DBG1( "WRITEx: %d, index = %d", count, index); */
+
+ if (!dc || !port)
+ return -ENODEV;
+
+ if (unlikely(!mutex_trylock(&port->tty_sem))) {
+ /*
+ * must test lock as tty layer wraps calls
+ * to this function with BKL
+ */
+ dev_err(&dc->pdev->dev, "Would have deadlocked - "
+ "return EAGAIN\n");
+ return -EAGAIN;
+ }
+
+ if (unlikely(!port->tty_open_count)) {
+ DBG1(" ");
+ goto exit;
+ }
+
+ rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count);
+
+ /* notify card */
+ if (unlikely(dc == NULL)) {
+ DBG1("No device context?");
+ goto exit;
+ }
+
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ /* CTS is only valid on the modem channel */
+ if (port == &(dc->port[PORT_MDM])) {
+ if (port->ctrl_dl.CTS) {
+ DBG4("Enable interrupt");
+ enable_transmit_ul(tty->index % MAX_PORT, dc);
+ } else {
+ dev_err(&dc->pdev->dev,
+ "CTS not active on modem port?\n");
+ }
+ } else {
+ enable_transmit_ul(tty->index % MAX_PORT, dc);
+ }
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+
+exit:
+ mutex_unlock(&port->tty_sem);
+ return rval;
+}
+
+/*
+ * Calculate how much is left in device
+ * This method is called by the upper tty layer.
+ * #according to sources N_TTY.c it expects a value >= 0 and
+ * does not check for negative values.
+ */
+static int ntty_write_room(struct tty_struct *tty)
+{
+ struct port *port = tty->driver_data;
+ int room = 0;
+ struct nozomi *dc = get_dc_by_tty(tty);
+
+ if (!dc || !port)
+ return 0;
+ if (!mutex_trylock(&port->tty_sem))
+ return 0;
+
+ if (!port->tty_open_count)
+ goto exit;
+
+ room = port->fifo_ul->size - __kfifo_len(port->fifo_ul);
+
+exit:
+ mutex_unlock(&port->tty_sem);
+ return room;
+}
+
+/* Gets io control parameters */
+static int ntty_tiocmget(struct tty_struct *tty, struct file *file)
+{
+ struct port *port = tty->driver_data;
+ struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
+ struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
+
+ return (ctrl_ul->RTS ? TIOCM_RTS : 0) |
+ (ctrl_ul->DTR ? TIOCM_DTR : 0) |
+ (ctrl_dl->DCD ? TIOCM_CAR : 0) |
+ (ctrl_dl->RI ? TIOCM_RNG : 0) |
+ (ctrl_dl->DSR ? TIOCM_DSR : 0) |
+ (ctrl_dl->CTS ? TIOCM_CTS : 0);
+}
+
+/* Sets io controls parameters */
+static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ if (set & TIOCM_RTS)
+ set_rts(tty, 1);
+ else if (clear & TIOCM_RTS)
+ set_rts(tty, 0);
+
+ if (set & TIOCM_DTR)
+ set_dtr(tty, 1);
+ else if (clear & TIOCM_DTR)
+ set_dtr(tty, 0);
+
+ return 0;
+}
+
+static int ntty_cflags_changed(struct port *port, unsigned long flags,
+ struct async_icount *cprev)
+{
+ struct async_icount cnow = port->tty_icount;
+ int ret;
+
+ ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
+ ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
+ ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
+ ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
+
+ *cprev = cnow;
+
+ return ret;
+}
+
+static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp)
+{
+ struct async_icount cnow = port->tty_icount;
+ struct serial_icounter_struct icount;
+
+ icount.cts = cnow.cts;
+ icount.dsr = cnow.dsr;
+ icount.rng = cnow.rng;
+ icount.dcd = cnow.dcd;
+ icount.rx = cnow.rx;
+ icount.tx = cnow.tx;
+ icount.frame = cnow.frame;
+ icount.overrun = cnow.overrun;
+ icount.parity = cnow.parity;
+ icount.brk = cnow.brk;
+ icount.buf_overrun = cnow.buf_overrun;
+
+ return copy_to_user(argp, &icount, sizeof(icount));
+}
+
+static int ntty_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct port *port = tty->driver_data;
+ void __user *argp = (void __user *)arg;
+ int rval = -ENOIOCTLCMD;
+
+ DBG1("******** IOCTL, cmd: %d", cmd);
+
+ switch (cmd) {
+ case TIOCMIWAIT: {
+ struct async_icount cprev = port->tty_icount;
+
+ rval = wait_event_interruptible(port->tty_wait,
+ ntty_cflags_changed(port, arg, &cprev));
+ break;
+ } case TIOCGICOUNT:
+ rval = ntty_ioctl_tiocgicount(port, argp);
+ break;
+ default:
+ DBG1("ERR: 0x%08X, %d", cmd, cmd);
+ break;
+ };
+
+ return rval;
+}
+
+/*
+ * Called by the upper tty layer when tty buffers are ready
+ * to receive data again after a call to throttle.
+ */
+static void ntty_unthrottle(struct tty_struct *tty)
+{
+ struct nozomi *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ DBG1("UNTHROTTLE");
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ enable_transmit_dl(tty->index % MAX_PORT, dc);
+ set_rts(tty, 1);
+
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+}
+
+/*
+ * Called by the upper tty layer when the tty buffers are almost full.
+ * The driver should stop send more data.
+ */
+static void ntty_throttle(struct tty_struct *tty)
+{
+ struct nozomi *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ DBG1("THROTTLE");
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ set_rts(tty, 0);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+}
+
+/* just to discard single character writes */
+static void ntty_put_char(struct tty_struct *tty, unsigned char c)
+{
+ /*
+ * card does not react correct when we write single chars
+ * to the card, so we discard them
+ */
+ DBG2("PUT CHAR Function: %c", c);
+}
+
+/* Returns number of chars in buffer, called by tty layer */
+static s32 ntty_chars_in_buffer(struct tty_struct *tty)
+{
+ struct port *port = tty->driver_data;
+ struct nozomi *dc = get_dc_by_tty(tty);
+ s32 rval;
+
+ if (unlikely(!dc || !port)) {
+ rval = -ENODEV;
+ goto exit_in_buffer;
+ }
+
+ if (unlikely(!port->tty_open_count)) {
+ dev_err(&dc->pdev->dev, "No tty open?\n");
+ rval = -ENODEV;
+ goto exit_in_buffer;
+ }
+
+ rval = __kfifo_len(port->fifo_ul);
+
+exit_in_buffer:
+ return rval;
+}
+
+static struct tty_operations tty_ops = {
+ .ioctl = ntty_ioctl,
+ .open = ntty_open,
+ .close = ntty_close,
+ .write = ntty_write,
+ .write_room = ntty_write_room,
+ .unthrottle = ntty_unthrottle,
+ .throttle = ntty_throttle,
+ .chars_in_buffer = ntty_chars_in_buffer,
+ .put_char = ntty_put_char,
+ .tiocmget = ntty_tiocmget,
+ .tiocmset = ntty_tiocmset,
+};
+
+/* Module initialization */
+static struct pci_driver nozomi_driver = {
+ .name = NOZOMI_NAME,
+ .id_table = nozomi_pci_tbl,
+ .probe = nozomi_card_init,
+ .remove = __devexit_p(nozomi_card_exit),
+};
+
+static __init int nozomi_init(void)
+{
+ int ret;
+
+ printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
+
+ ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
+ if (!ntty_driver)
+ return -ENOMEM;
+
+ ntty_driver->owner = THIS_MODULE;
+ ntty_driver->driver_name = NOZOMI_NAME_TTY;
+ ntty_driver->name = "noz";
+ ntty_driver->major = 0;
+ ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ ntty_driver->subtype = SERIAL_TYPE_NORMAL;
+ ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ ntty_driver->init_termios = tty_std_termios;
+ ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
+ HUPCL | CLOCAL;
+ ntty_driver->init_termios.c_ispeed = 115200;
+ ntty_driver->init_termios.c_ospeed = 115200;
+ tty_set_operations(ntty_driver, &tty_ops);
+
+ ret = tty_register_driver(ntty_driver);
+ if (ret) {
+ printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
+ goto free_tty;
+ }
+
+ ret = pci_register_driver(&nozomi_driver);
+ if (ret) {
+ printk(KERN_ERR "Nozomi: can't register pci driver\n");
+ goto unr_tty;
+ }
+
+ return 0;
+unr_tty:
+ tty_unregister_driver(ntty_driver);
+free_tty:
+ put_tty_driver(ntty_driver);
+ return ret;
+}
+
+static __exit void nozomi_exit(void)
+{
+ printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
+ pci_unregister_driver(&nozomi_driver);
+ tty_unregister_driver(ntty_driver);
+ put_tty_driver(ntty_driver);
+}
+
+module_init(nozomi_init);
+module_exit(nozomi_exit);
+
+module_param(debug, int, S_IRUGO | S_IWUSR);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);