* [PATCH 0/2] LaCie Firewire Speakers/Griffin FireWave support [not found] <4D46933D.5050609@ladisch.de> @ 2011-02-07 9:13 ` Clemens Ladisch 2011-02-07 9:14 ` [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver Clemens Ladisch 2011-02-07 9:14 ` [PATCH 2/2] alsa-lib: add LaCie Firewire Speakers/Griffin FireWave Surround driver Clemens Ladisch 0 siblings, 2 replies; 12+ messages in thread From: Clemens Ladisch @ 2011-02-07 9:13 UTC (permalink / raw) To: Stefan Richter, Jay Fenlason; +Cc: alsa-devel, linux1394-devel This driver version is, I hope, finished enough so that I can commit it soon. The FireWave's low-frequency processing makes me believe that this device is prepared to accept two- and four-channel data, so I've enabled this in the driver; but I'd still like to actually know if it works. (If it does, adding support for the AC-3 decoding will be possible too.) I haven't yet looked into volume controls. Jay, are you OK with "Tested-by: Jay Fenlason <fenlason@redhat.com>"? Stefan, if those firewire core bits are worth your notice :) , please give an Acked-by for them. Regards, Clemens ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 9:13 ` [PATCH 0/2] LaCie Firewire Speakers/Griffin FireWave support Clemens Ladisch @ 2011-02-07 9:14 ` Clemens Ladisch 2011-02-07 14:40 ` Stefan Richter ` (2 more replies) 2011-02-07 9:14 ` [PATCH 2/2] alsa-lib: add LaCie Firewire Speakers/Griffin FireWave Surround driver Clemens Ladisch 1 sibling, 3 replies; 12+ messages in thread From: Clemens Ladisch @ 2011-02-07 9:14 UTC (permalink / raw) To: Stefan Richter, Jay Fenlason; +Cc: alsa-devel, linux1394-devel Add a driver for two playback-only FireWire devices based on the OXFW970 chip. v2: Better AMDTP API abstraction; fix fw_unit leak; small fixes. Two- and four-channel output on the FireWave is experimental. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> --- drivers/firewire/core-iso.c | 1 drivers/firewire/core.h | 3 include/linux/firewire.h | 7 sound/Kconfig | 2 sound/Makefile | 2 sound/firewire/Kconfig | 25 + sound/firewire/Makefile | 6 sound/firewire/amdtp.c | 511 ++++++++++++++++++++++++++++++++ sound/firewire/amdtp.h | 151 +++++++++ sound/firewire/cmp.c | 316 +++++++++++++++++++ sound/firewire/cmp.h | 40 ++ sound/firewire/fcp.c | 223 +++++++++++++ sound/firewire/fcp.h | 12 sound/firewire/iso-resources.c | 224 ++++++++++++++ sound/firewire/iso-resources.h | 39 ++ sound/firewire/lib.c | 68 ++++ sound/firewire/lib.h | 19 + sound/firewire/packets-buffer.c | 74 ++++ sound/firewire/packets-buffer.h | 26 + sound/firewire/speakers.c | 484 ++++++++++++++++++++++++++++++ 20 files changed, 2229 insertions(+), 4 deletions(-) --- a/sound/Kconfig +++ b/sound/Kconfig @@ -97,6 +97,8 @@ source "sound/sh/Kconfig" # here assuming USB is defined before ALSA source "sound/usb/Kconfig" +source "sound/firewire/Kconfig" + # the following will depend on the order of config. # here assuming PCMCIA is defined before ALSA source "sound/pcmcia/Kconfig" --- a/sound/Makefile +++ b/sound/Makefile @@ -6,7 +6,7 @@ obj-$(CONFIG_SOUND_PRIME) += sound_firmw obj-$(CONFIG_SOUND_PRIME) += oss/ obj-$(CONFIG_DMASOUND) += oss/ obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \ - sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ + firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ obj-$(CONFIG_SND_AOA) += aoa/ # This one must be compilable even if sound is configured out --- /dev/null +++ b/sound/firewire/Kconfig @@ -0,0 +1,25 @@ +menuconfig SND_FIREWIRE + bool "FireWire sound devices" + depends on FIREWIRE + default y + help + Support for IEEE-1394/FireWire/iLink sound devices. + +if SND_FIREWIRE && FIREWIRE + +config SND_FIREWIRE_LIB + tristate + depends on SND_PCM + +config SND_FIREWIRE_SPEAKERS + tristate "FireWire speakers" + select SND_PCM + select SND_FIREWIRE_LIB + help + Say Y here to include support for the LaCie Firewire Speakers + and the Griffin FireWave Surround. + + To compile this driver as a module, choose M here: the module + will be called snd-firewire-speakers. + +endif # SND_FIREWIRE --- /dev/null +++ b/sound/firewire/Makefile @@ -0,0 +1,6 @@ +snd-firewire-lib-objs := lib.o iso-resources.o packets-buffer.o \ + fcp.o cmp.o amdtp.o +snd-firewire-speakers-objs := speakers.o + +obj-$(CONFIG_SND_FIREWIRE_LIB) += snd-firewire-lib.o +obj-$(CONFIG_SND_FIREWIRE_SPEAKERS) += snd-firewire-speakers.o --- a/drivers/firewire/core-iso.c +++ b/drivers/firewire/core-iso.c @@ -369,3 +369,4 @@ void fw_iso_resource_manage(struct fw_ca *channel = ret; } } +EXPORT_SYMBOL(fw_iso_resource_manage); --- a/drivers/firewire/core.h +++ b/drivers/firewire/core.h @@ -147,9 +147,6 @@ void fw_node_event(struct fw_card *card, /* -iso */ int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma); -void fw_iso_resource_manage(struct fw_card *card, int generation, - u64 channels_mask, int *channel, int *bandwidth, - bool allocate, __be32 buffer[2]); /* -topology */ --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -42,6 +42,10 @@ #define CSR_BROADCAST_CHANNEL 0x234 #define CSR_CONFIG_ROM 0x400 #define CSR_CONFIG_ROM_END 0x800 +#define CSR_OMPR 0x900 +#define CSR_OPCR(i) (0x904 + (i) * 4) +#define CSR_IMPR 0x980 +#define CSR_IPCR(i) (0x984 + (i) * 4) #define CSR_FCP_COMMAND 0xB00 #define CSR_FCP_RESPONSE 0xD00 #define CSR_FCP_END 0xF00 @@ -441,5 +445,8 @@ int fw_iso_context_start(struct fw_iso_c int cycle, int sync, int tags); int fw_iso_context_stop(struct fw_iso_context *ctx); void fw_iso_context_destroy(struct fw_iso_context *ctx); +void fw_iso_resource_manage(struct fw_card *card, int generation, + u64 channels_mask, int *channel, int *bandwidth, + bool allocate, __be32 buffer[2]); #endif /* _LINUX_FIREWIRE_H */ --- /dev/null +++ b/sound/firewire/cmp.c @@ -0,0 +1,316 @@ +/* + * Connection Management Procedures (IEC 61883-1) helper functions + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/module.h> +#include <linux/sched.h> +#include "lib.h" +#include "iso-resources.h" +#include "cmp.h" + +#define IMPR_SPEED_MASK 0xc0000000 +#define IMPR_SPEED_SHIFT 30 +#define IMPR_XSPEED_MASK 0x00000060 +#define IMPR_XSPEED_SHIFT 5 +#define IMPR_PLUGS_MASK 0x0000001f + +#define IPCR_ONLINE 0x80000000 +#define IPCR_BCAST_CONN 0x40000000 +#define IPCR_P2P_CONN_MASK 0x3f000000 +#define IPCR_P2P_CONN_SHIFT 24 +#define IPCR_CHANNEL_MASK 0x003f0000 +#define IPCR_CHANNEL_SHIFT 16 + +enum bus_reset_handling { + ABORT_ON_BUS_RESET, + SUCCEED_ON_BUS_RESET, +}; + +#define cmp_err(c, fmt, arg...) \ + dev_err(&(c)->resources.unit->device, fmt, ##arg) + +static int pcr_modify(struct cmp_connection *c, + __be32 (*modify)(struct cmp_connection *c, __be32 old), + int (*check)(struct cmp_connection *c, __be32 pcr), + enum bus_reset_handling bus_reset_handling) +{ + struct fw_device *device = fw_parent_device(c->resources.unit); + __be32 *buffer = c->resources.buffer; + int generation = c->resources.generation; + int rcode, errors; + __be32 old_arg; + int err; + + errors = 0; + for (;;) { + rcode = fw_run_transaction( + device->card, TCODE_READ_QUADLET_REQUEST, + device->node_id, generation, device->max_speed, + CSR_REGISTER_BASE + CSR_IPCR(c->pcr_index), + buffer, 4); + if (rcode == RCODE_COMPLETE) { + if (check) { + err = check(c, buffer[0]); + if (err < 0) + return err; + } + break; + } else if (rcode == RCODE_GENERATION) + goto bus_reset; + else if (rcode_is_permanent_error(rcode) || ++errors >= 3) + goto io_error; + } + + errors = 0; + for (;;) { + old_arg = buffer[0]; + buffer[1] = modify(c, buffer[0]); + + rcode = fw_run_transaction( + device->card, TCODE_LOCK_COMPARE_SWAP, + device->node_id, generation, device->max_speed, + CSR_REGISTER_BASE + CSR_IPCR(c->pcr_index), + buffer, 8); + + if (rcode == RCODE_COMPLETE) { + if (buffer[0] == old_arg) /* success? */ + break; + + if (check) { + err = check(c, buffer[0]); + if (err < 0) + return err; + } + } else if (rcode == RCODE_GENERATION) + goto bus_reset; + else if (rcode_is_permanent_error(rcode) || ++errors >= 3) + goto io_error; + } + + return 0; + +io_error: + cmp_err(c, "iPCR%u: transaction failed: %s\n", + c->pcr_index, rcode_string(rcode)); + return -EIO; + +bus_reset: + return bus_reset_handling == ABORT_ON_BUS_RESET ? -EAGAIN : 0; +} + + +/** + * cmp_connection_init - initializes a connection manager + * @c: the connection manager to initialize + * @unit: a unit of the target device + * @ipcr_index: the index of the iPCR on the target device + */ +int cmp_connection_init(struct cmp_connection* c, + struct fw_unit *unit, + unsigned int ipcr_index) +{ + __be32 impr_be; + u32 impr; + int err; + + err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST, + CSR_REGISTER_BASE + CSR_IMPR, + &impr_be, 4); + if (err < 0) + return err; + impr = be32_to_cpu(impr_be); + + if (ipcr_index >= (impr & IMPR_PLUGS_MASK)) + return -EINVAL; + + fw_iso_resources_init(&c->resources, unit); + c->connected = false; + mutex_init(&c->mutex); + c->pcr_index = ipcr_index; + c->max_speed = (impr & IMPR_SPEED_MASK) >> IMPR_SPEED_SHIFT; + if (c->max_speed == SCODE_BETA) + c->max_speed += (impr & IMPR_XSPEED_MASK) >> IMPR_XSPEED_SHIFT; + + return 0; +} +EXPORT_SYMBOL(cmp_connection_init); + +/** + * cmp_connection_destroy - free connection manager resources + * @c: the connection manager + */ +void cmp_connection_destroy(struct cmp_connection *c) +{ + WARN_ON(c->connected); + mutex_destroy(&c->mutex); + fw_iso_resources_destroy(&c->resources); +} +EXPORT_SYMBOL(cmp_connection_destroy); + + +static __be32 ipcr_set_modify(struct cmp_connection *c, __be32 ipcr) +{ + ipcr &= ~cpu_to_be32(IPCR_BCAST_CONN | + IPCR_P2P_CONN_MASK | + IPCR_CHANNEL_MASK); + ipcr |= cpu_to_be32(1 << IPCR_P2P_CONN_SHIFT); + ipcr |= cpu_to_be32(c->resources.channel << IPCR_CHANNEL_SHIFT); + + return ipcr; +} + +static int ipcr_set_check(struct cmp_connection *c, __be32 ipcr) +{ + if (ipcr & cpu_to_be32(IPCR_BCAST_CONN | + IPCR_P2P_CONN_MASK)) { + cmp_err(c, "iPCR%u: plug is already in use\n", c->pcr_index); + return -EBUSY; + } + if (!(ipcr & cpu_to_be32(IPCR_ONLINE))) { + cmp_err(c, "iPCR%u: plug is not on-line\n", c->pcr_index); + return -ECONNREFUSED; + } + + return 0; +} + +/** + * cmp_connection_establish - establish a connection to the target + * @c: the connection manager + * @max_payload_bytes: the amount of data (including CIP headers) per packet + * + * This function establishes a point-to-point connection from the local + * computer to the target by allocating isochronous resources (channel and + * bandwidth) and setting the target's input plug control register. When this + * function succeeds, the caller is responsible for starting transmitting + * packets. + */ +int cmp_connection_establish(struct cmp_connection *c, + unsigned int max_payload_bytes) +{ + int err; + + if (WARN_ON(c->connected)) + return -EISCONN; + + c->speed = min(c->max_speed, + fw_parent_device(c->resources.unit)->max_speed); + + mutex_lock(&c->mutex); + +retry_after_bus_reset: + err = fw_iso_resources_allocate(&c->resources, + max_payload_bytes, c->speed); + if (err < 0) + goto err_mutex; + + err = pcr_modify(c, ipcr_set_modify, ipcr_set_check, + ABORT_ON_BUS_RESET); + if (err == -EAGAIN) { + fw_iso_resources_free(&c->resources); + goto retry_after_bus_reset; + } + if (err < 0) + goto err_resources; + + c->connected = true; + + mutex_unlock(&c->mutex); + + return 0; + +err_resources: + fw_iso_resources_free(&c->resources); +err_mutex: + mutex_unlock(&c->mutex); + + return err; +} +EXPORT_SYMBOL(cmp_connection_establish); + +/** + * cmp_connection_update - update the connection after a bus reset + * @c: the connection manager + * + * This function must be called from the driver's .update handler to reestablish + * any connection that might have been active. + * + * Returns zero on success, or a negative error code. On an error, the + * connection is broken and the caller must stop transmitting iso packets. + */ +int cmp_connection_update(struct cmp_connection *c) +{ + int err; + + mutex_lock(&c->mutex); + + if (!c->connected) { + mutex_unlock(&c->mutex); + return 0; + } + + err = fw_iso_resources_update(&c->resources); + if (err < 0) + goto err_unconnect; + + err = pcr_modify(c, ipcr_set_modify, ipcr_set_check, + SUCCEED_ON_BUS_RESET); + if (err < 0) + goto err_resources; + + mutex_unlock(&c->mutex); + + return 0; + +err_resources: + fw_iso_resources_free(&c->resources); +err_unconnect: + c->connected = false; + mutex_unlock(&c->mutex); + + return err; +} +EXPORT_SYMBOL(cmp_connection_update); + + +static __be32 ipcr_break_modify(struct cmp_connection *c, __be32 ipcr) +{ + return ipcr & ~cpu_to_be32(IPCR_BCAST_CONN | IPCR_P2P_CONN_MASK); +} + +/** + * cmp_connection_break - break the connection to the target + * @c: the connection manager + * + * This function deactives the connection in the target's input plug control + * register, and frees the isochronous resources of the connection. Before + * calling this function, the caller should cease transmitting packets. + */ +void cmp_connection_break(struct cmp_connection *c) +{ + int err; + + mutex_lock(&c->mutex); + + if (!c->connected) { + mutex_unlock(&c->mutex); + return; + } + + err = pcr_modify(c, ipcr_break_modify, NULL, SUCCEED_ON_BUS_RESET); + if (err < 0) + cmp_err(c, "plug is still connected\n"); + + fw_iso_resources_free(&c->resources); + + c->connected = false; + + mutex_unlock(&c->mutex); +} +EXPORT_SYMBOL(cmp_connection_break); --- /dev/null +++ b/sound/firewire/cmp.h @@ -0,0 +1,40 @@ +#ifndef SOUND_FIREWIRE_CMP_H_INCLUDED +#define SOUND_FIREWIRE_CMP_H_INCLUDED + +#include <linux/mutex.h> +#include <linux/types.h> +#include "iso-resources.h" + +struct fw_unit; + +/** + * struct cmp_connection - manages an isochronous connection to a device + * @speed: the connection's actual speed + * + * This structure manages (using CMP) an isochronous stream from the local + * computer to a device's input plug (iPCR). + * + * There is no corresponding oPCR created on the local computer, so it is not + * possible to overlay connections on top of this one. + */ +struct cmp_connection { + int speed; + /* private: */ + bool connected; + struct mutex mutex; + struct fw_iso_resources resources; + unsigned int pcr_index; + unsigned int max_speed; +}; + +int cmp_connection_init(struct cmp_connection* connection, + struct fw_unit *unit, + unsigned int ipcr_index); +void cmp_connection_destroy(struct cmp_connection *connection); + +int cmp_connection_establish(struct cmp_connection *connection, + unsigned int max_payload); +int cmp_connection_update(struct cmp_connection *connection); +void cmp_connection_break(struct cmp_connection *connection); + +#endif --- /dev/null +++ b/sound/firewire/fcp.c @@ -0,0 +1,223 @@ +/* + * Function Control Protocol (IEC 61883-1) helper functions + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/spinlock.h> +#include <linux/wait.h> +#include "fcp.h" +#include "lib.h" + +#define CTS_AVC 0x00 + +#define ERROR_RETRIES 3 +#define ERROR_DELAY_MS 5 +#define FCP_TIMEOUT_MS 125 + +static DEFINE_SPINLOCK(transactions_lock); +static LIST_HEAD(transactions); + +enum fcp_state { + STATE_PENDING, + STATE_BUS_RESET, + STATE_COMPLETE, +}; + +struct fcp_transaction { + struct list_head list; + struct fw_unit *unit; + void *response_buffer; + unsigned int response_size; + unsigned int response_match_bytes; + enum fcp_state state; + wait_queue_head_t wait; +}; + +/** + * fcp_avc_transaction - send an AV/C command and wait for its response + * @unit: a unit on the target device + * @command: a buffer containing the command frame; must be DMA-able + * @command_size: the size of @command + * @response: a buffer for the response frame + * @response_size: the maximum size of @response + * @response_match_bytes: a bitmap specifying the bytes used to detect the + * correct response frame + * + * This function sends a FCP command frame to the target and waits for the + * corresponding response frame to be returned. + * + * Because it is possible for multiple FCP transactions to be active at the + * same time, the correct response frame is detected by the value of certain + * bytes. These bytes must be set in @response before calling this function, + * and the corresponding bits must be set in @response_match_bytes. + * + * @command and @response can point to the same buffer. + * + * Asynchronous operation (INTERIM, NOTIFY) is not supported at the moment. + * + * Returns the actual size of the response frame, or a negative error code. + */ +int fcp_avc_transaction(struct fw_unit *unit, + const void *command, unsigned int command_size, + void *response, unsigned int response_size, + unsigned int response_match_bytes) +{ + struct fcp_transaction t; + int tcode, ret, tries = 0; + + t.unit = unit; + t.response_buffer = response; + t.response_size = response_size; + t.response_match_bytes = response_match_bytes; + t.state = STATE_PENDING; + init_waitqueue_head(&t.wait); + + spin_lock_irq(&transactions_lock); + list_add_tail(&t.list, &transactions); + spin_unlock_irq(&transactions_lock); + + for (;;) { + tcode = command_size == 4 ? TCODE_WRITE_QUADLET_REQUEST + : TCODE_WRITE_BLOCK_REQUEST; + ret = snd_fw_transaction(t.unit, tcode, + CSR_REGISTER_BASE + CSR_FCP_COMMAND, + (void *)command, command_size); + if (ret < 0) + break; + + wait_event_timeout(t.wait, t.state != STATE_PENDING, + msecs_to_jiffies(FCP_TIMEOUT_MS)); + + if (t.state == STATE_COMPLETE) { + ret = t.response_size; + break; + } else if (t.state == STATE_BUS_RESET) { + msleep(ERROR_DELAY_MS); + } else if (++tries >= ERROR_RETRIES) { + dev_err(&t.unit->device, "FCP command timed out\n"); + ret = -EIO; + break; + } + } + + spin_lock_irq(&transactions_lock); + list_del(&t.list); + spin_unlock_irq(&transactions_lock); + + return ret; +} +EXPORT_SYMBOL(fcp_avc_transaction); + +/** + * fcp_bus_reset - inform the target handler about a bus reset + * @unit: the unit that might be used by fcp_avc_transaction() + * + * This function must be called from the driver's .update handler to inform + * the FCP transaction handler that a bus reset has happened. Any pending FCP + * transactions are retried. + */ +void fcp_bus_reset(struct fw_unit *unit) +{ + struct fcp_transaction *t; + + spin_lock_irq(&transactions_lock); + list_for_each_entry(t, &transactions, list) { + if (t->unit == unit && + t->state == STATE_PENDING) { + t->state = STATE_BUS_RESET; + wake_up(&t->wait); + } + } + spin_unlock_irq(&transactions_lock); +} +EXPORT_SYMBOL(fcp_bus_reset); + +/* checks whether the response matches the masked bytes in response_buffer */ +static bool is_matching_response(struct fcp_transaction *transaction, + const void *response, size_t length) +{ + const u8 *p1, *p2; + unsigned int mask, i; + + p1 = response; + p2 = transaction->response_buffer; + mask = transaction->response_match_bytes; + + for (i = 0; ; ++i) { + if ((mask & 1) && p1[i] != p2[i]) + return false; + mask >>= 1; + if (!mask) + return true; + if (--length == 0) + return false; + } +} + +static void fcp_response(struct fw_card *card, struct fw_request *request, + int tcode, int destination, int source, + int generation, unsigned long long offset, + void *data, size_t length, void *callback_data) +{ + struct fcp_transaction *t; + unsigned long flags; + + if (length < 1 || (*(const u8 *)data & 0xf0) != CTS_AVC) + return; + + spin_lock_irqsave(&transactions_lock, flags); + list_for_each_entry(t, &transactions, list) { + struct fw_device *device = fw_parent_device(t->unit); + if (device->card != card || + device->generation != generation) + continue; + smp_rmb(); /* node_id vs. generation */ + if (device->node_id != source) + continue; + + if (t->state == STATE_PENDING && + is_matching_response(t, data, length)) { + t->state = STATE_COMPLETE; + t->response_size = min((unsigned int)length, + t->response_size); + memcpy(t->response_buffer, data, t->response_size); + wake_up(&t->wait); + } + } + spin_unlock_irqrestore(&transactions_lock, flags); +} + +static struct fw_address_handler response_register_handler = { + .length = 0x200, + .address_callback = fcp_response, +}; + +static int __init fcp_module_init(void) +{ + static const struct fw_address_region response_register_region = { + .start = CSR_REGISTER_BASE + CSR_FCP_RESPONSE, + .end = CSR_REGISTER_BASE + CSR_FCP_END, + }; + + fw_core_add_address_handler(&response_register_handler, + &response_register_region); + + return 0; +} + +static void __exit fcp_module_exit(void) +{ + WARN_ON(!list_empty(&transactions)); + fw_core_remove_address_handler(&response_register_handler); +} + +module_init(fcp_module_init); +module_exit(fcp_module_exit); --- /dev/null +++ b/sound/firewire/fcp.h @@ -0,0 +1,12 @@ +#ifndef SOUND_FIREWIRE_FCP_H_INCLUDED +#define SOUND_FIREWIRE_FCP_H_INCLUDED + +struct fw_unit; + +int fcp_avc_transaction(struct fw_unit *unit, + const void *command, unsigned int command_size, + void *response, unsigned int response_size, + unsigned int response_match_bytes); +void fcp_bus_reset(struct fw_unit *unit); + +#endif --- /dev/null +++ b/sound/firewire/speakers.c @@ -0,0 +1,484 @@ +/* + * OXFW970-based speakers driver + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/initval.h> +#include <sound/pcm.h> +#include "cmp.h" +#include "fcp.h" +#include "amdtp.h" +#include "lib.h" + +#define OXFORD_FIRMWARE_ID_ADDRESS (CSR_REGISTER_BASE + 0x50000) +/* 0x970?vvvv or 0x971?vvvv, where vvvv = firmware version */ + +#define OXFORD_HARDWARE_ID_ADDRESS (CSR_REGISTER_BASE + 0x90020) +#define OXFORD_HARDWARE_ID_OXFW970 0x39443841 +#define OXFORD_HARDWARE_ID_OXFW971 0x39373100 + +#define VENDOR_GRIFFIN 0x001292 +#define VENDOR_LACIE 0x00d04b + +#define SPECIFIER_1394TA 0x00a02d +#define VERSION_AVC 0x010001 + +struct device_info { + const char *driver_name; + const char *short_name; + const char *long_name; + unsigned int rates; + unsigned int channels_max; +}; + +struct fwspk { + struct snd_card *card; + struct fw_unit *unit; + const struct device_info *device_info; + struct snd_pcm_substream *pcm; + struct mutex mutex; + struct cmp_connection connection; + struct amdtp_out_stream stream; + bool stream_running; +}; + +MODULE_DESCRIPTION("FireWire speakers driver"); +MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); +MODULE_LICENSE("GPL v2"); + +static int fwspk_open(struct snd_pcm_substream *substream) +{ + static const struct snd_pcm_hardware hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER, + .formats = AMDTP_OUT_PCM_FORMAT_BITS, + .channels_min = 2, + .buffer_bytes_max = 16 * 1024 * 1024, + .period_bytes_min = 1, + .period_bytes_max = UINT_MAX, + .periods_min = 1, + .periods_max = UINT_MAX, + }; + struct fwspk *fwspk = substream->private_data; + int err; + + substream->runtime->hw = hardware; + substream->runtime->hw.rates = fwspk->device_info->rates; + substream->runtime->hw.channels_max = fwspk->device_info->channels_max; + + err = snd_pcm_limit_hw_rates(substream->runtime); + if (err < 0) + return err; + + err = snd_pcm_hw_constraint_step(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_CHANNELS, 2); + if (err < 0) + return err; + + err = snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIOD_TIME, + 5000, 8192000); + if (err < 0) + return err; + + err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24); + if (err < 0) + return err; + + return 0; +} + +static int fwspk_close(struct snd_pcm_substream *substream) +{ + return 0; +} + +static void fwspk_stop_stream(struct fwspk *fwspk) +{ + if (fwspk->stream_running) { + amdtp_out_stream_stop(&fwspk->stream); + cmp_connection_break(&fwspk->connection); + fwspk->stream_running = false; + } +} + +static int fwspk_set_rate(struct fwspk *fwspk, unsigned int sfc) +{ + u8 *buf; + int err; + + buf = kmalloc(8, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + buf[0] = 0x00; /* AV/C, CONTROL */ + buf[1] = 0xff; /* unit */ + buf[2] = 0x19; /* INPUT PLUG SIGNAL FORMAT */ + buf[3] = 0x00; /* plug 0 */ + buf[4] = 0x90; /* format: audio */ + buf[5] = 0x00 | sfc; /* AM824, frequency */ + buf[6] = 0xff; /* SYT (not used) */ + buf[7] = 0xff; + + err = fcp_avc_transaction(fwspk->unit, buf, 8, buf, 8, + BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5)); + if (err < 0) + goto error; + if (err < 6 || buf[0] != 0x09 /* ACCEPTED */) { + dev_err(&fwspk->unit->device, "failed to set sample rate\n"); + err = -EIO; + goto error; + } + + err = 0; + +error: + kfree(buf); + + return err; +} + +static int fwspk_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct fwspk *fwspk = substream->private_data; + int err; + + mutex_lock(&fwspk->mutex); + fwspk_stop_stream(fwspk); + mutex_unlock(&fwspk->mutex); + + err = snd_pcm_lib_alloc_vmalloc_buffer(substream, + params_buffer_bytes(hw_params)); + if (err < 0) + goto error; + + amdtp_out_stream_set_rate(&fwspk->stream, params_rate(hw_params)); + amdtp_out_stream_set_pcm(&fwspk->stream, params_channels(hw_params)); + + err = fwspk_set_rate(fwspk, fwspk->stream.sfc); + if (err < 0) + goto err_buffer; + + return 0; + +err_buffer: + snd_pcm_lib_free_vmalloc_buffer(substream); +error: + return err; +} + +static int fwspk_hw_free(struct snd_pcm_substream *substream) +{ + struct fwspk *fwspk = substream->private_data; + + mutex_lock(&fwspk->mutex); + fwspk_stop_stream(fwspk); + mutex_unlock(&fwspk->mutex); + + return snd_pcm_lib_free_vmalloc_buffer(substream); +} + +static int fwspk_prepare(struct snd_pcm_substream *substream) +{ + struct fwspk *fwspk = substream->private_data; + int err; + + mutex_lock(&fwspk->mutex); + + if (!fwspk->stream_running) { + err = cmp_connection_establish(&fwspk->connection, + amdtp_out_stream_get_max_payload(&fwspk->stream)); + if (err < 0) + goto err_mutex; + + err = amdtp_out_stream_start(&fwspk->stream, + fwspk->connection.resources.channel, + fwspk->connection.speed); + if (err < 0) + goto err_connection; + + fwspk->stream_running = true; + } + + mutex_unlock(&fwspk->mutex); + + amdtp_out_stream_pcm_prepare(&fwspk->stream); + + return 0; + +err_connection: + cmp_connection_break(&fwspk->connection); +err_mutex: + mutex_unlock(&fwspk->mutex); + + return err; +} + +static int fwspk_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct fwspk *fwspk = substream->private_data; + struct snd_pcm_substream *pcm; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + pcm = substream; + break; + case SNDRV_PCM_TRIGGER_STOP: + pcm = NULL; + break; + default: + return -EINVAL; + } + amdtp_out_stream_pcm_trigger(&fwspk->stream, pcm); + return 0; +} + +static snd_pcm_uframes_t fwspk_pointer(struct snd_pcm_substream *substream) +{ + struct fwspk *fwspk = substream->private_data; + + return amdtp_out_stream_pcm_pointer(&fwspk->stream); +} + +static int fwspk_create_pcm(struct fwspk *fwspk) +{ + static struct snd_pcm_ops ops = { + .open = fwspk_open, + .close = fwspk_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = fwspk_hw_params, + .hw_free = fwspk_hw_free, + .prepare = fwspk_prepare, + .trigger = fwspk_trigger, + .pointer = fwspk_pointer, + .page = snd_pcm_lib_get_vmalloc_page, + .mmap = snd_pcm_lib_mmap_vmalloc, + }; + struct snd_pcm *pcm; + int err; + + err = snd_pcm_new(fwspk->card, "OXFW970", 0, 1, 0, &pcm); + if (err < 0) + return err; + pcm->private_data = fwspk; + strcpy(pcm->name, fwspk->device_info->short_name); + fwspk->pcm = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; + fwspk->pcm->ops = &ops; + return 0; +} + +static u32 fwspk_read_firmware_version(struct fw_unit *unit) +{ + __be32 data; + int err; + + err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST, + OXFORD_FIRMWARE_ID_ADDRESS, &data, 4); + return err >= 0 ? be32_to_cpu(data) : 0; +} + +static void fwspk_card_free(struct snd_card *card) +{ + struct fwspk *fwspk = card->private_data; + + amdtp_out_stream_destroy(&fwspk->stream); + cmp_connection_destroy(&fwspk->connection); + fw_unit_put(fwspk->unit); + mutex_destroy(&fwspk->mutex); +} + +static const struct device_info *__devinit fwspk_detect(struct fw_device *dev) +{ + static const struct device_info griffin_firewave = { + .driver_name = "FireWave", + .short_name = "FireWave", + .long_name = "Griffin FireWave Surround", + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_96000, + .channels_max = 6, + }; + static const struct device_info lacie_speakers = { + .driver_name = "FWSpeakers", + .short_name = "Firewire Speakers", + .long_name = "LaCie Firewire Speakers", + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | + SNDRV_PCM_RATE_96000, + .channels_max = 2, + }; + struct fw_csr_iterator i; + int key, value; + + fw_csr_iterator_init(&i, dev->config_rom); + while (fw_csr_iterator_next(&i, &key, &value)) + if (key == CSR_VENDOR) + switch (value) { + case VENDOR_GRIFFIN: + return &griffin_firewave; + case VENDOR_LACIE: + return &lacie_speakers; + } + + return NULL; +} + +static int __devinit fwspk_probe(struct device *unit_dev) +{ + struct fw_unit *unit = fw_unit(unit_dev); + struct fw_device *fw_dev = fw_parent_device(unit); + struct snd_card *card; + struct fwspk *fwspk; + u32 firmware; + int err; + + err = snd_card_create(-1, NULL, THIS_MODULE, sizeof(*fwspk), &card); + if (err < 0) + return err; + snd_card_set_dev(card, unit_dev); + + fwspk = card->private_data; + fwspk->card = card; + mutex_init(&fwspk->mutex); + fwspk->unit = fw_unit_get(unit); + fwspk->device_info = fwspk_detect(fw_dev); + if (!fwspk->device_info) { + err = -ENODEV; + goto err_unit; + } + + err = cmp_connection_init(&fwspk->connection, unit, 0); + if (err < 0) + goto err_unit; + + err = amdtp_out_stream_init(&fwspk->stream, unit, CIP_NONBLOCKING); + if (err < 0) + goto err_connection; + + card->private_free = fwspk_card_free; + + strcpy(card->driver, fwspk->device_info->driver_name); + strcpy(card->shortname, fwspk->device_info->short_name); + firmware = fwspk_read_firmware_version(unit); + snprintf(card->longname, sizeof(card->longname), + "%s (OXFW%x %04x), GUID %08x%08x at %s, S%d", + fwspk->device_info->long_name, + firmware >> 20, firmware & 0xffff, + fw_dev->config_rom[3], fw_dev->config_rom[4], + dev_name(&unit->device), 100 << fw_dev->max_speed); + strcpy(card->mixername, "OXFW970"); + + err = fwspk_create_pcm(fwspk); + if (err < 0) + goto error; + + err = snd_card_register(card); + if (err < 0) + goto error; + + dev_set_drvdata(unit_dev, fwspk); + + return 0; + +err_connection: + cmp_connection_destroy(&fwspk->connection); +err_unit: + fw_unit_put(fwspk->unit); + mutex_destroy(&fwspk->mutex); +error: + snd_card_free(card); + return err; +} + +static int __devexit fwspk_remove(struct device *dev) +{ + struct fwspk *fwspk = dev_get_drvdata(dev); + + snd_card_disconnect(fwspk->card); + snd_card_free_when_closed(fwspk->card); + return 0; +} + +static void fwspk_bus_reset(struct fw_unit *unit) +{ + struct fwspk *fwspk = dev_get_drvdata(&unit->device); + + fcp_bus_reset(fwspk->unit); + + if (cmp_connection_update(&fwspk->connection) < 0) { + mutex_lock(&fwspk->mutex); + amdtp_out_stream_pcm_abort(&fwspk->stream); + fwspk_stop_stream(fwspk); + mutex_unlock(&fwspk->mutex); + return; + } + + amdtp_out_stream_update(&fwspk->stream); +} + +static const struct ieee1394_device_id fwspk_id_table[] = { + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION, + .vendor_id = VENDOR_GRIFFIN, + .model_id = 0x00f970, + .specifier_id = SPECIFIER_1394TA, + .version = VERSION_AVC, + }, + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION, + .vendor_id = VENDOR_LACIE, + .model_id = 0x00f970, + .specifier_id = SPECIFIER_1394TA, + .version = VERSION_AVC, + }, + { } +}; +MODULE_DEVICE_TABLE(ieee1394, fwspk_id_table); + +static struct fw_driver fwspk_driver = { + .driver = { + .owner = THIS_MODULE, + .name = KBUILD_MODNAME, + .bus = &fw_bus_type, + .probe = fwspk_probe, + .remove = __devexit_p(fwspk_remove), + }, + .update = fwspk_bus_reset, + .id_table = fwspk_id_table, +}; + +static int __init alsa_fwspk_init(void) +{ + return driver_register(&fwspk_driver.driver); +} + +static void __exit alsa_fwspk_exit(void) +{ + driver_unregister(&fwspk_driver.driver); +} + +module_init(alsa_fwspk_init); +module_exit(alsa_fwspk_exit); --- /dev/null +++ b/sound/firewire/lib.c @@ -0,0 +1,68 @@ +/* + * miscellaneous helper functions + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/module.h> +#include "lib.h" + +#define ERROR_RETRY_DELAY_MS 5 + +const char *rcode_string(unsigned int rcode) +{ + static const char *const names[] = { + [RCODE_COMPLETE] = "complete", + [RCODE_CONFLICT_ERROR] = "conflict error", + [RCODE_DATA_ERROR] = "data error", + [RCODE_TYPE_ERROR] = "type error", + [RCODE_ADDRESS_ERROR] = "address error", + [RCODE_SEND_ERROR] = "send error", + [RCODE_CANCELLED] = "cancelled", + [RCODE_BUSY] = "busy", + [RCODE_GENERATION] = "generation", + [RCODE_NO_ACK] = "no ack", + }; + + if (rcode < ARRAY_SIZE(names) && names[rcode]) + return names[rcode]; + else + return "unknown"; +} +EXPORT_SYMBOL(rcode_string); + +int snd_fw_transaction(struct fw_unit *unit, int tcode, + u64 offset, void *buffer, size_t length) +{ + struct fw_device *device = fw_parent_device(unit); + int generation, rcode, tries = 0; + + for (;;) { + generation = device->generation; + smp_rmb(); /* node_id vs. generation */ + rcode = fw_run_transaction(device->card, tcode, + device->node_id, generation, + device->max_speed, offset, + buffer, length); + + if (rcode == RCODE_COMPLETE) + return 0; + + if (rcode_is_permanent_error(rcode) || ++tries >= 3) { + dev_err(&unit->device, "transaction failed: %s\n", + rcode_string(rcode)); + return -EIO; + } + + msleep(ERROR_RETRY_DELAY_MS); + } +} +EXPORT_SYMBOL(snd_fw_transaction); + +MODULE_DESCRIPTION("FireWire audio helper functions"); +MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); +MODULE_LICENSE("GPL v2"); --- /dev/null +++ b/sound/firewire/lib.h @@ -0,0 +1,19 @@ +#ifndef SOUND_FIREWIRE_LIB_H_INCLUDED +#define SOUND_FIREWIRE_LIB_H_INCLUDED + +#include <linux/firewire-constants.h> +#include <linux/types.h> + +struct fw_unit; + +int snd_fw_transaction(struct fw_unit *unit, int tcode, + u64 offset, void *buffer, size_t length); +const char *rcode_string(unsigned int rcode); + +/* returns true if retrying the transaction would not make sense */ +static inline bool rcode_is_permanent_error(int rcode) +{ + return rcode == RCODE_TYPE_ERROR || rcode == RCODE_ADDRESS_ERROR; +} + +#endif --- /dev/null +++ b/sound/firewire/iso-resources.c @@ -0,0 +1,224 @@ +/* + * isochronous resources helper functions + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/jiffies.h> +#include <linux/mutex.h> +#include <linux/sched.h> +#include <linux/spinlock.h> +#include "iso-resources.h" + +/** + * fw_iso_resources_init - initializes a &struct fw_iso_resources + * @r: the resource manager to initialize + * @unit: the device unit for which the resources will be needed + * + * If the device does not support all channel numbers, change @r->channels_mask + * after calling this function. + */ +void fw_iso_resources_init(struct fw_iso_resources *r, struct fw_unit *unit) +{ + r->channels_mask = ~0uLL; + r->unit = fw_unit_get(unit); + mutex_init(&r->mutex); + r->allocated = false; +} + +/** + * fw_iso_resources_destroy - destroy a resource manager + * @r: the resource manager that is no longer needed + */ +void fw_iso_resources_destroy(struct fw_iso_resources *r) +{ + WARN_ON(r->allocated); + mutex_destroy(&r->mutex); + fw_unit_put(r->unit); +} + +static unsigned int packet_bandwidth(unsigned int max_payload_bytes, int speed) +{ + unsigned int bytes, s400_bytes; + + /* iso packets have three header quadlets and quadlet-aligned payload */ + bytes = 3 * 4 + ALIGN(max_payload_bytes, 4); + + /* convert to bandwidth units (quadlets at S1600 = bytes at S400) */ + if (speed <= SCODE_400) + s400_bytes = bytes * (1 << (SCODE_400 - speed)); + else + s400_bytes = DIV_ROUND_UP(bytes, 1 << (speed - SCODE_400)); + + return s400_bytes; +} + +static int current_bandwidth_overhead(struct fw_card *card) +{ + /* + * Under the usual pessimistic assumption (cable length 4.5 m), the + * isochronous overhead for N cables is 1.797 µs + N * 0.494 µs, or + * 88.3 + N * 24.3 in bandwidth units. + * + * The calculation below tries to deduce N from the current gap count. + * If the gap count has been optimized by measuring the actual packet + * transmission time, this derived overhead should be near the actual + * overhead as well. + */ + return card->gap_count * 97 / 10 + 89; +} + +static int wait_isoch_resource_delay_after_bus_reset(struct fw_card *card) +{ + for (;;) { + s64 delay = (card->reset_jiffies + HZ) - get_jiffies_64(); + if (delay <= 0) + return 0; + if (schedule_timeout_interruptible(delay) > 0) + return -ERESTARTSYS; + } +} + +/** + * fw_iso_resources_allocate - allocate isochronous channel and bandwidth + * @r: the resource manager + * @max_payload_bytes: the amount of data (including CIP headers) per packet + * @speed: the speed (e.g., SCODE_400) at which the packets will be sent + * + * This function allocates one isochronous channel and enough bandwidth for the + * specified packet size. + * + * Returns the channel number that the caller must use for streaming, or + * a negative error code. Due to potentionally long delays, this function is + * interruptible and can return -ERESTARTSYS. On success, the caller is + * responsible for calling fw_iso_resources_update() on bus resets, and + * fw_iso_resources_free() when the resources are not longer needed. + */ +int fw_iso_resources_allocate(struct fw_iso_resources *r, + unsigned int max_payload_bytes, int speed) +{ + struct fw_card *card = fw_parent_device(r->unit)->card; + int bandwidth, channel, err; + + if (WARN_ON(r->allocated)) + return -EBADFD; + + r->bandwidth = packet_bandwidth(max_payload_bytes, speed); + +retry_after_bus_reset: + spin_lock_irq(&card->lock); + r->generation = card->generation; + r->bandwidth_overhead = current_bandwidth_overhead(card); + spin_unlock_irq(&card->lock); + + err = wait_isoch_resource_delay_after_bus_reset(card); + if (err < 0) + return err; + + mutex_lock(&r->mutex); + + bandwidth = r->bandwidth + r->bandwidth_overhead; + fw_iso_resource_manage(card, r->generation, r->channels_mask, + &channel, &bandwidth, true, r->buffer); + if (channel == -EAGAIN) { + mutex_unlock(&r->mutex); + goto retry_after_bus_reset; + } + if (channel >= 0) { + r->channel = channel; + r->allocated = true; + } else { + if (channel == -EBUSY) + dev_err(&r->unit->device, + "isochronous resources exhausted\n"); + else + dev_err(&r->unit->device, + "isochronous resource allocation failed\n"); + } + + mutex_unlock(&r->mutex); + + return channel; +} + +/** + * fw_iso_resources_update - update resource allocations after a bus reset + * @r: the resource manager + * + * This function must be called from the driver's .update handler to reallocate + * any resources that were allocated before the bus reset. It is safe to call + * this function if no resources are currently allocated. + * + * Returns a negative error code on failure. If this happens, the caller must + * stop streaming. + */ +int fw_iso_resources_update(struct fw_iso_resources *r) +{ + struct fw_card *card = fw_parent_device(r->unit)->card; + int bandwidth, channel; + + mutex_lock(&r->mutex); + + if (!r->allocated) { + mutex_unlock(&r->mutex); + return 0; + } + + spin_lock_irq(&card->lock); + r->generation = card->generation; + r->bandwidth_overhead = current_bandwidth_overhead(card); + spin_unlock_irq(&card->lock); + + bandwidth = r->bandwidth + r->bandwidth_overhead; + + fw_iso_resource_manage(card, r->generation, 1uLL << r->channel, + &channel, &bandwidth, true, r->buffer); + /* + * When another bus reset happens, pretend that the allocation + * succeeded; we will try again for the new generation later. + */ + if (channel < 0 && channel != -EAGAIN) { + r->allocated = false; + if (channel == -EBUSY) + dev_err(&r->unit->device, + "isochronous resources exhausted\n"); + else + dev_err(&r->unit->device, + "isochronous resource allocation failed\n"); + } + + mutex_unlock(&r->mutex); + + return channel; +} + +/** + * fw_iso_resources_free - frees allocated resources + * @r: the resource manager + * + * This function deallocates the channel and bandwidth, if allocated. + */ +void fw_iso_resources_free(struct fw_iso_resources *r) +{ + struct fw_card *card = fw_parent_device(r->unit)->card; + int bandwidth, channel; + + mutex_lock(&r->mutex); + + if (r->allocated) { + bandwidth = r->bandwidth + r->bandwidth_overhead; + fw_iso_resource_manage(card, r->generation, 1uLL << r->channel, + &channel, &bandwidth, false, r->buffer); + if (channel < 0) + dev_err(&r->unit->device, + "isochronous resource deallocation failed\n"); + + r->allocated = false; + } + + mutex_unlock(&r->mutex); +} --- /dev/null +++ b/sound/firewire/iso-resources.h @@ -0,0 +1,39 @@ +#ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED +#define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED + +#include <linux/mutex.h> +#include <linux/types.h> + +struct fw_unit; + +/** + * struct fw_iso_resources - manages channel/bandwidth allocation + * @channels_mask: if the device does not support all channel numbers, set this + * bit mask to something else than the default (all ones) + * + * This structure manages (de)allocation of isochronous resources (channel and + * bandwidth) for one isochronous stream. + */ +struct fw_iso_resources { + u64 channels_mask; + /* private: */ + struct fw_unit *unit; + struct mutex mutex; + unsigned int channel; + unsigned int bandwidth; /* in bandwidth units, without overhead */ + unsigned int bandwidth_overhead; + int generation; /* in which allocation is valid */ + bool allocated; + __be32 buffer[2]; +}; + +void fw_iso_resources_init(struct fw_iso_resources *r, + struct fw_unit *unit); +void fw_iso_resources_destroy(struct fw_iso_resources *r); + +int fw_iso_resources_allocate(struct fw_iso_resources *r, + unsigned int max_payload_bytes, int speed); +int fw_iso_resources_update(struct fw_iso_resources *r); +void fw_iso_resources_free(struct fw_iso_resources *r); + +#endif --- /dev/null +++ b/sound/firewire/packets-buffer.c @@ -0,0 +1,74 @@ +/* + * helpers for managing a buffer for many packets + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/firewire.h> +#include <linux/slab.h> +#include "packets-buffer.h" + +/** + * iso_packets_buffer_init - allocates the memory for packets + * @b: the buffer structure to initialize + * @unit: the device at the other end of the stream + * @count: the number of packets + * @packet_size: the (maximum) size of a packet, in bytes + * @direction: %DMA_TO_DEVICE or %DMA_FROM_DEVICE + */ +int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit, + unsigned int count, unsigned int packet_size, + enum dma_data_direction direction) +{ + unsigned int packets_per_page, pages; + unsigned int i, page_index, offset_in_page; + void *p; + int err; + + b->packets = kmalloc(count * sizeof(*b->packets), GFP_KERNEL); + if (!b->packets) { + err = -ENOMEM; + goto error; + } + + packet_size = L1_CACHE_ALIGN(packet_size); + packets_per_page = PAGE_SIZE / packet_size; + if (WARN_ON(!packets_per_page)) { + err = -EINVAL; + goto error; + } + pages = DIV_ROUND_UP(count, packets_per_page); + + err = fw_iso_buffer_init(&b->iso_buffer, fw_parent_device(unit)->card, + pages, direction); + if (err < 0) + goto err_packets; + + for (i = 0; i < count; ++i) { + page_index = i / packets_per_page; + p = page_address(b->iso_buffer.pages[page_index]); + offset_in_page = (i % packets_per_page) * packet_size; + b->packets[i].buffer = p + offset_in_page; + b->packets[i].offset = page_index * PAGE_SIZE + offset_in_page; + } + + return 0; + +err_packets: + kfree(b->packets); +error: + return err; +} + +/** + * iso_packets_buffer_destroy - frees packet buffer resources + * @b: the buffer structure to free + * @unit: the device at the other end of the stream + */ +void iso_packets_buffer_destroy(struct iso_packets_buffer *b, + struct fw_unit *unit) +{ + fw_iso_buffer_destroy(&b->iso_buffer, fw_parent_device(unit)->card); + kfree(b->packets); +} --- /dev/null +++ b/sound/firewire/packets-buffer.h @@ -0,0 +1,26 @@ +#ifndef SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED +#define SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED + +#include <linux/dma-mapping.h> +#include <linux/firewire.h> + +/** + * struct iso_packets_buffer - manages a buffer for many packets + * @iso_buffer: the memory containing the packets + * @packets: an array, with each element pointing to one packet + */ +struct iso_packets_buffer { + struct fw_iso_buffer iso_buffer; + struct { + void *buffer; + unsigned int offset; + } *packets; +}; + +int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit, + unsigned int count, unsigned int packet_size, + enum dma_data_direction direction); +void iso_packets_buffer_destroy(struct iso_packets_buffer *b, + struct fw_unit *unit); + +#endif --- /dev/null +++ b/sound/firewire/amdtp.c @@ -0,0 +1,511 @@ +/* + * Audio and Music Data Transmission Protocol (IEC 61883-6) streams + * with Common Isochronous Packet (IEC 61883-1) headers + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/firewire.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <sound/pcm.h> +#include "amdtp.h" + +#define TICKS_PER_CYCLE 3072 +#define CYCLES_PER_SECOND 8000 +#define TICKS_PER_SECOND (TICKS_PER_CYCLE * CYCLES_PER_SECOND) + +#define TRANSFER_DELAY_TICKS 0x2e00 /* 479.17 µs */ + +#define TAG_CIP 1 + +#define CIP_EOH (1u << 31) +#define CIP_FMT_AM (0x10 << 24) +#define AMDTP_FDF_AM824 (0 << 19) +#define AMDTP_FDF_SFC_SHIFT 16 + +/* TODO: make these configurable */ +#define INTERRUPT_INTERVAL 16 +#define QUEUE_LENGTH 48 + +/** + * amdtp_out_stream_init - initialize an AMDTP output stream structure + * @s: the AMDTP output stream to initialize + * @unit: the target of the stream + * @flags: the packet transmission method to use + */ +int amdtp_out_stream_init(struct amdtp_out_stream *s, struct fw_unit *unit, + enum cip_out_flags flags) +{ + if (flags != CIP_NONBLOCKING) + return -EINVAL; + + s->unit = fw_unit_get(unit); + s->flags = flags; + s->context = ERR_PTR(-1); + mutex_init(&s->mutex); + + return 0; +} +EXPORT_SYMBOL(amdtp_out_stream_init); + +/** + * amdtp_out_stream_destroy - free stream resources + * @s: the AMDTP output stream to destroy + */ +void amdtp_out_stream_destroy(struct amdtp_out_stream *s) +{ + WARN_ON(!IS_ERR(s->context)); + mutex_destroy(&s->mutex); + fw_unit_put(s->unit); +} +EXPORT_SYMBOL(amdtp_out_stream_destroy); + +/** + * amdtp_out_stream_set_rate - configure the sampling frequency + * @s: the AMDTP output stream to configure + * @rate: 32000, 44100, 48000, 88200, 96000, 176400, or 192000 + * + * The stream rate must be set before the stream is started, and must not be + * changed while the stream is running. + */ +void amdtp_out_stream_set_rate(struct amdtp_out_stream *s, unsigned int rate) +{ + static const struct { + unsigned int rate; + unsigned int syt_interval; + } rate_info[] = { + [CIP_SFC_32000] = { 32000, 8, }, + [CIP_SFC_44100] = { 44100, 8, }, + [CIP_SFC_48000] = { 48000, 8, }, + [CIP_SFC_88200] = { 88200, 16, }, + [CIP_SFC_96000] = { 96000, 16, }, + [CIP_SFC_176400] = { 176400, 32, }, + [CIP_SFC_192000] = { 192000, 32, }, + }; + unsigned int sfc; + + if (WARN_ON(!IS_ERR(s->context))) + return; + + for (sfc = 0; sfc < ARRAY_SIZE(rate_info); ++sfc) + if (rate_info[sfc].rate == rate) { + s->sfc = sfc; + s->syt_interval = rate_info[sfc].syt_interval; + return; + } + WARN_ON(1); +} +EXPORT_SYMBOL(amdtp_out_stream_set_rate); + +/** + * amdtp_out_stream_get_max_payload - get the stream's packet size + * @s: the AMDTP output stream + * + * This function must not be called before the stream has been configured + * with amdtp_out_stream_set_rate(), amdtp_out_stream_set_pcm(), and + * amdtp_out_stream_set_midi(). + */ +unsigned int amdtp_out_stream_get_max_payload(struct amdtp_out_stream *s) +{ + static const unsigned int max_data_blocks[] = { + [CIP_SFC_32000] = 4, + [CIP_SFC_44100] = 6, + [CIP_SFC_48000] = 6, + [CIP_SFC_88200] = 12, + [CIP_SFC_96000] = 12, + [CIP_SFC_176400] = 23, + [CIP_SFC_192000] = 24, + }; + + s->data_block_quadlets = s->pcm_channels; + s->data_block_quadlets += DIV_ROUND_UP(s->midi_ports, 8); + + return 8 + max_data_blocks[s->sfc] * 4 * s->data_block_quadlets; +} +EXPORT_SYMBOL(amdtp_out_stream_get_max_payload); + +static unsigned int calculate_data_blocks(struct amdtp_out_stream *s) +{ + unsigned int phase, data_blocks; + + if (!cip_sfc_is_base_44100(s->sfc)) { + /* Sample_rate / 8000 is an integer, and precomputed. */ + data_blocks = s->data_block_state; + } else { + phase = s->data_block_state; + + /* + * This calculates the number of data blocks per packet so that + * 1) the overall rate is correct and exactly synchronized to + * the bus clock, and + * 2) packets with a rounded-up number of blocks occur as early + * as possible in the sequence (to prevent underruns of the + * device's buffer). + */ + if (s->sfc == CIP_SFC_44100) + /* 6 6 5 6 5 6 5 ... */ + data_blocks = 5 + ((phase & 1) ^ + (phase == 0 || phase >= 40)); + else + /* 12 11 11 11 11 ... or 23 22 22 22 22 ... */ + data_blocks = 11 * (s->sfc >> 1) + (phase == 0); + if (++phase >= (80 >> (s->sfc >> 1))) + phase = 0; + s->data_block_state = phase; + } + + return data_blocks; +} + +static unsigned int calculate_syt(struct amdtp_out_stream *s, unsigned int cycle) +{ + unsigned int syt_offset, phase, index, syt_index, tick_offset, syt; + + if (s->last_syt_offset < TICKS_PER_CYCLE) { + if (!cip_sfc_is_base_44100(s->sfc)) + syt_offset = s->last_syt_offset + s->syt_offset_state; + else { + /* + * The time, in ticks, of the n'th SYT_INTERVAL sample is: + * n * SYT_INTERVAL * 24576000 / sample_rate + * Modulo TICKS_PER_CYCLE, the difference between successive + * elements is about 1386.23. Rounding the results of this + * formula to the SYT precision results in a sequence of + * differences that begins with: + * 1386 1386 1387 1386 1386 1386 1387 1386 1386 1386 1387 ... + * This code generates _exactly_ the same sequence. + */ + phase = s->syt_offset_state; + index = phase % 13; + syt_offset = s->last_syt_offset; + syt_offset += 1386 + ((index && !(index & 3)) || + phase == 146); + if (++phase >= 147) + phase = 0; + s->syt_offset_state = phase; + } + } else + syt_offset = s->last_syt_offset - TICKS_PER_CYCLE; + s->last_syt_offset = syt_offset; + + syt_index = -s->data_block_counter & (s->syt_interval - 1); + tick_offset = TRANSFER_DELAY_TICKS - TICKS_PER_CYCLE + syt_offset; + syt = (cycle + tick_offset / TICKS_PER_CYCLE) << 12; + syt += tick_offset % TICKS_PER_CYCLE; + + return syt & 0xffff; +} + +static bool amdtp_fill_pcm(struct amdtp_out_stream *s, + __be32 *buffer, unsigned int frames) +{ + struct snd_pcm_runtime *runtime = s->pcm->runtime; + unsigned int channels, remaining_frames, frame_step, i, c, ptr; + const void *src; + + channels = s->pcm_channels; + src = runtime->dma_area + + s->pcm_buffer_pointer * (runtime->frame_bits / 8); + remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer; + frame_step = s->data_block_quadlets - channels; + + switch (runtime->format) { + case SNDRV_PCM_FORMAT_S32: + for (i = 0; i < frames; ++i) { + for (c = 0; c < channels; ++c) { + *buffer = cpu_to_be32((*(const u32 *)src >> 8) | + 0x40000000); + src += 4; + buffer++; + } + buffer += frame_step; + if (--remaining_frames == 0) + src = runtime->dma_area; + } + break; + + case SNDRV_PCM_FORMAT_S16: + for (i = 0; i < frames; ++i) { + for (c = 0; c < channels; ++c) { + *buffer = cpu_to_be32((*(const u16 *)src << 8) | + 0x40000000); + src += 2; + buffer++; + } + buffer += frame_step; + if (--remaining_frames == 0) + src = runtime->dma_area; + } + break; + } + + ptr = s->pcm_buffer_pointer + frames; + if (ptr >= runtime->buffer_size) + ptr -= runtime->buffer_size; + ACCESS_ONCE(s->pcm_buffer_pointer) = ptr; + + s->pcm_period_pointer += frames; + if (s->pcm_period_pointer >= runtime->period_size) { + s->pcm_period_pointer -= runtime->period_size; + return true; + } else + return false; +} + +static void amdtp_fill_pcm_silence(struct amdtp_out_stream *s, + __be32 *buffer, unsigned int frames) +{ + unsigned int i, c; + + for (i = 0; i < frames; ++i) { + for (c = 0; c < s->pcm_channels; ++c) + buffer[c] = cpu_to_be32(0x40000000); + buffer += s->data_block_quadlets; + } +} + +static void amdtp_fill_midi(struct amdtp_out_stream *s, + __be32 *buffer, unsigned int frames) +{ + unsigned int i; + + for (i = 0; i < frames; ++i) + buffer[s->pcm_channels + i * s->data_block_quadlets] = + cpu_to_be32(0x80000000); +} + +static void queue_out_packet(struct amdtp_out_stream *s, unsigned int cycle) +{ + __be32 *buffer; + unsigned int data_blocks, syt; + struct snd_pcm_substream *pcm; + bool pcm_period_elapsed; + struct fw_iso_packet packet; + int err; + + data_blocks = calculate_data_blocks(s); + syt = calculate_syt(s, cycle); + + buffer = s->buffer.packets[s->packet_counter].buffer; + buffer[0] = cpu_to_be32(ACCESS_ONCE(s->source_node_id_field) | + (s->data_block_quadlets << 16) | + s->data_block_counter); + buffer[1] = cpu_to_be32(CIP_EOH | CIP_FMT_AM | AMDTP_FDF_AM824 | + (s->sfc << AMDTP_FDF_SFC_SHIFT) | syt); + buffer += 2; + + pcm = ACCESS_ONCE(s->pcm); + if (pcm) + pcm_period_elapsed = amdtp_fill_pcm(s, buffer, data_blocks); + else { + amdtp_fill_pcm_silence(s, buffer, data_blocks); + pcm_period_elapsed = false; + } + if (s->midi_ports) + amdtp_fill_midi(s, buffer, data_blocks); + + s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff; + + packet.payload_length = 8 + data_blocks * 4 * s->data_block_quadlets; + packet.interrupt = IS_ALIGNED(s->packet_counter + 1, + INTERRUPT_INTERVAL); + packet.skip = 0; + packet.tag = TAG_CIP; + packet.sy = 0; + packet.header_length = 0; + + err = fw_iso_context_queue(s->context, &packet, &s->buffer.iso_buffer, + s->buffer.packets[s->packet_counter].offset); + if (err < 0) + dev_err(&s->unit->device, "queueing error: %d\n", err); + + if (++s->packet_counter >= QUEUE_LENGTH) + s->packet_counter = 0; + + if (pcm_period_elapsed) + snd_pcm_period_elapsed(pcm); +} + +static void out_packet_callback(struct fw_iso_context *context, u32 cycle, + size_t header_length, void *header, void *data) +{ + struct amdtp_out_stream *s = data; + unsigned int i, packets = header_length / 4; + + /* + * Compute the cycle of the last queued packet. + * (We need only the four lowest bits for the SYT, so we can ignore + * that bits 0-11 must wrap around at 3072.) + */ + cycle += QUEUE_LENGTH - packets; + + for (i = 0; i < packets; ++i) + queue_out_packet(s, ++cycle); +} + +static int queue_initial_skip_packets(struct amdtp_out_stream *s) +{ + struct fw_iso_packet skip_packet = { + .skip = 1, + }; + unsigned int i; + int err; + + for (i = 0; i < QUEUE_LENGTH; ++i) { + skip_packet.interrupt = IS_ALIGNED(s->packet_counter + 1, + INTERRUPT_INTERVAL); + err = fw_iso_context_queue(s->context, &skip_packet, NULL, 0); + if (err < 0) + return err; + if (++s->packet_counter >= QUEUE_LENGTH) + s->packet_counter = 0; + } + + return 0; +} + +/** + * amdtp_out_stream_start - start sending packets + * @s: the AMDTP output stream to start + * @channel: the isochronous channel on the bus + * @speed: firewire speed code + * + * The stream cannot be started until it has been configured with + * amdtp_out_stream_set_rate(), amdtp_out_stream_set_pcm(), and + * amdtp_out_stream_set_midi(); and it must be started before any + * PCM or MIDI device can be started. + */ +int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed) +{ + static const struct { + unsigned int data_block; + unsigned int syt_offset; + } initial_state[] = { + [CIP_SFC_32000] = { 4, 3072 }, + [CIP_SFC_48000] = { 6, 1024 }, + [CIP_SFC_96000] = { 12, 1024 }, + [CIP_SFC_192000] = { 24, 1024 }, + [CIP_SFC_44100] = { 0, 67 }, + [CIP_SFC_88200] = { 0, 67 }, + [CIP_SFC_176400] = { 0, 67 }, + }; + int err; + + mutex_lock(&s->mutex); + + if (WARN_ON(!IS_ERR(s->context) || + (!s->pcm_channels && !s->midi_ports))) { + err = -EBADFD; + goto err_unlock; + } + + s->data_block_state = initial_state[s->sfc].data_block; + s->syt_offset_state = initial_state[s->sfc].syt_offset; + s->last_syt_offset = TICKS_PER_CYCLE; + + err = iso_packets_buffer_init(&s->buffer, s->unit, QUEUE_LENGTH, + amdtp_out_stream_get_max_payload(s), + DMA_TO_DEVICE); + if (err < 0) + goto err_unlock; + + s->context = fw_iso_context_create(fw_parent_device(s->unit)->card, + FW_ISO_CONTEXT_TRANSMIT, + channel, speed, 0, + out_packet_callback, s); + if (IS_ERR(s->context)) { + err = PTR_ERR(s->context); + if (err == -EBUSY) + dev_err(&s->unit->device, + "no free output stream on this controller\n"); + goto err_buffer; + } + + amdtp_out_stream_update(s); + + s->packet_counter = 0; + s->data_block_counter = 0; + err = queue_initial_skip_packets(s); + if (err < 0) + goto err_context; + + err = fw_iso_context_start(s->context, -1, 0, 0); + if (err < 0) + goto err_context; + + mutex_unlock(&s->mutex); + + return 0; + +err_context: + fw_iso_context_destroy(s->context); + s->context = ERR_PTR(-1); +err_buffer: + iso_packets_buffer_destroy(&s->buffer, s->unit); +err_unlock: + mutex_unlock(&s->mutex); + + return err; +} +EXPORT_SYMBOL(amdtp_out_stream_start); + +/** + * amdtp_out_stream_update - update the stream after a bus reset + * @s: the AMDTP output stream + */ +void amdtp_out_stream_update(struct amdtp_out_stream *s) +{ + ACCESS_ONCE(s->source_node_id_field) = + (fw_parent_device(s->unit)->card->node_id & 0x3f) << 24; +} +EXPORT_SYMBOL(amdtp_out_stream_update); + +/** + * amdtp_out_stream_stop - stop sending packets + * @s: the AMDTP output stream to stop + * + * All PCM and MIDI devices of the stream must be stopped before the stream + * itself can be stopped. + */ +void amdtp_out_stream_stop(struct amdtp_out_stream *s) +{ + mutex_lock(&s->mutex); + + if (IS_ERR(s->context)) { + mutex_unlock(&s->mutex); + return; + } + + fw_iso_context_stop(s->context); + fw_iso_context_destroy(s->context); + s->context = ERR_PTR(-1); + iso_packets_buffer_destroy(&s->buffer, s->unit); + + mutex_unlock(&s->mutex); +} +EXPORT_SYMBOL(amdtp_out_stream_stop); + +/** + * amdtp_out_stream_pcm_abort - abort the running PCM device + * @s: the AMDTP stream about to be stopped + * + * If the isochronous stream needs to be stopped asynchronously, call this + * function first to stop the PCM device. + */ +void amdtp_out_stream_pcm_abort(struct amdtp_out_stream *s) +{ + struct snd_pcm_substream *pcm; + + pcm = ACCESS_ONCE(s->pcm); + if (pcm) { + snd_pcm_stream_lock_irq(pcm); + if (snd_pcm_running(pcm)) + snd_pcm_stop(pcm, SNDRV_PCM_STATE_XRUN); + snd_pcm_stream_unlock_irq(pcm); + } +} +EXPORT_SYMBOL(amdtp_out_stream_pcm_abort); --- /dev/null +++ b/sound/firewire/amdtp.h @@ -0,0 +1,151 @@ +#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED +#define SOUND_FIREWIRE_AMDTP_H_INCLUDED + +#include <linux/mutex.h> +#include <linux/spinlock.h> +#include "packets-buffer.h" + +/** + * enum cip_out_flags - describes details of the streaming protocol + * @CIP_NONBLOCKING: In non-blocking mode, each packet contains + * sample_rate/8000 samples, with rounding up or down to adjust + * for clock skew and left-over fractional samples. This should + * be used if supported by the device. + */ +enum cip_out_flags { + CIP_NONBLOCKING = 0, +}; + +/** + * enum cip_sfc - a stream's sample rate + */ +enum cip_sfc { + CIP_SFC_32000 = 0, + CIP_SFC_44100 = 1, + CIP_SFC_48000 = 2, + CIP_SFC_88200 = 3, + CIP_SFC_96000 = 4, + CIP_SFC_176400 = 5, + CIP_SFC_192000 = 6, +}; + +#define AMDTP_OUT_PCM_FORMAT_BITS (SNDRV_PCM_FMTBIT_S16 | \ + SNDRV_PCM_FMTBIT_S32) + +struct fw_unit; +struct fw_iso_context; +struct snd_pcm_substream; + +struct amdtp_out_stream { + struct fw_unit *unit; + enum cip_out_flags flags; + struct fw_iso_context *context; + struct mutex mutex; + + enum cip_sfc sfc; + unsigned int data_block_quadlets; + unsigned int pcm_channels; + unsigned int midi_ports; + + unsigned int syt_interval; + unsigned int source_node_id_field; + struct iso_packets_buffer buffer; + + struct snd_pcm_substream *pcm; + + unsigned int packet_counter; + unsigned int data_block_counter; + + unsigned int data_block_state; + + unsigned int last_syt_offset; + unsigned int syt_offset_state; + + unsigned int pcm_buffer_pointer; + unsigned int pcm_period_pointer; +}; + +int amdtp_out_stream_init(struct amdtp_out_stream *s, struct fw_unit *unit, + enum cip_out_flags flags); +void amdtp_out_stream_destroy(struct amdtp_out_stream *s); + +void amdtp_out_stream_set_rate(struct amdtp_out_stream *s, unsigned int rate); +unsigned int amdtp_out_stream_get_max_payload(struct amdtp_out_stream *s); + +int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed); +void amdtp_out_stream_update(struct amdtp_out_stream *s); +void amdtp_out_stream_stop(struct amdtp_out_stream *s); +void amdtp_out_stream_pcm_abort(struct amdtp_out_stream *s); + +/** + * amdtp_out_stream_set_pcm - configure format of PCM samples + * @s: the AMDTP output stream to be configured + * @pcm_channels: the number of PCM samples in each data block, to be encoded + * as AM824 multi-bit linear audio + * + * This function must not be called while the stream is running. + */ +static inline void amdtp_out_stream_set_pcm(struct amdtp_out_stream *s, + unsigned int pcm_channels) +{ + s->pcm_channels = pcm_channels; +} + +/** + * amdtp_out_stream_set_midi - configure format of MIDI data + * @s: the AMDTP output stream to be configured + * @midi_ports: the number of MIDI ports (i.e., MPX-MIDI Data Channels) + * + * This function must not be called while the stream is running. + */ +static inline void amdtp_out_stream_set_midi(struct amdtp_out_stream *s, + unsigned int midi_ports) +{ + s->midi_ports = midi_ports; +} + +/** + * amdtp_out_stream_pcm_prepare - prepare PCM device for running + * @s: the AMDTP output stream + * + * This function should be called from the PCM device's .prepare callback. + */ +static inline void amdtp_out_stream_pcm_prepare(struct amdtp_out_stream *s) +{ + s->pcm_buffer_pointer = 0; + s->pcm_period_pointer = 0; +} + +/** + * amdtp_out_stream_pcm_trigger - start/stop playback from a PCM device + * @s: the AMDTP output stream + * @pcm: the PCM device to be started, or %NULL to stop the current device + * + * Call this function on a running isochronous stream to enable the actual + * transmission of PCM data. This function should be called from the PCM + * device's .trigger callback. + */ +static inline void amdtp_out_stream_pcm_trigger(struct amdtp_out_stream *s, + struct snd_pcm_substream *pcm) +{ + ACCESS_ONCE(s->pcm) = pcm; +} + +/** + * amdtp_out_stream_pcm_pointer - get the PCM buffer position + * @s: the AMDTP output stream that transports the PCM data + * + * Returns the current buffer position, in frames. + */ +static inline unsigned long +amdtp_out_stream_pcm_pointer(struct amdtp_out_stream *s) +{ + return ACCESS_ONCE(s->pcm_buffer_pointer); +} + +static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc) +{ + return sfc & 1; +} + +#endif ------------------------------------------------------------------------------ The modern datacenter depends on network connectivity to access resources and provide services. The best practices for maximizing a physical server's connectivity to a physical network are well understood - see how these rules translate into the virtual world? http://p.sf.net/sfu/oracle-sfdevnlfb _______________________________________________ mailing list linux1394-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux1394-devel ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 9:14 ` [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver Clemens Ladisch @ 2011-02-07 14:40 ` Stefan Richter 2011-02-07 14:56 ` Clemens Ladisch 2011-02-07 21:56 ` Stefan Richter 2011-02-07 16:49 ` Stefan Richter 2011-02-10 9:46 ` [PATCH] " Clemens Ladisch 2 siblings, 2 replies; 12+ messages in thread From: Stefan Richter @ 2011-02-07 14:40 UTC (permalink / raw) To: Clemens Ladisch; +Cc: alsa-devel, linux1394-devel, Jay Fenlason On Feb 07 Clemens Ladisch wrote: > Add a driver for two playback-only FireWire devices based on the OXFW970 > chip. > > v2: Better AMDTP API abstraction; fix fw_unit leak; small fixes. > Two- and four-channel output on the FireWave is experimental. > > Signed-off-by: Clemens Ladisch <clemens@ladisch.de> > --- > drivers/firewire/core-iso.c | 1 > drivers/firewire/core.h | 3 > include/linux/firewire.h | 7 > sound/Kconfig | 2 > sound/Makefile | 2 > sound/firewire/Kconfig | 25 + > sound/firewire/Makefile | 6 > sound/firewire/amdtp.c | 511 ++++++++++++++++++++++++++++++++ > sound/firewire/amdtp.h | 151 +++++++++ > sound/firewire/cmp.c | 316 +++++++++++++++++++ > sound/firewire/cmp.h | 40 ++ > sound/firewire/fcp.c | 223 +++++++++++++ > sound/firewire/fcp.h | 12 > sound/firewire/iso-resources.c | 224 ++++++++++++++ > sound/firewire/iso-resources.h | 39 ++ > sound/firewire/lib.c | 68 ++++ > sound/firewire/lib.h | 19 + > sound/firewire/packets-buffer.c | 74 ++++ > sound/firewire/packets-buffer.h | 26 + > sound/firewire/speakers.c | 484 ++++++++++++++++++++++++++++++ > 20 files changed, 2229 insertions(+), 4 deletions(-) [...] > --- a/drivers/firewire/core-iso.c > +++ b/drivers/firewire/core-iso.c > @@ -369,3 +369,4 @@ void fw_iso_resource_manage(struct fw_ca > *channel = ret; > } > } > +EXPORT_SYMBOL(fw_iso_resource_manage); > --- a/drivers/firewire/core.h > +++ b/drivers/firewire/core.h > @@ -147,9 +147,6 @@ void fw_node_event(struct fw_card *card, > /* -iso */ > > int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma); > -void fw_iso_resource_manage(struct fw_card *card, int generation, > - u64 channels_mask, int *channel, int *bandwidth, > - bool allocate, __be32 buffer[2]); > > > /* -topology */ > --- a/include/linux/firewire.h > +++ b/include/linux/firewire.h > @@ -42,6 +42,10 @@ > #define CSR_BROADCAST_CHANNEL 0x234 > #define CSR_CONFIG_ROM 0x400 > #define CSR_CONFIG_ROM_END 0x800 > +#define CSR_OMPR 0x900 > +#define CSR_OPCR(i) (0x904 + (i) * 4) > +#define CSR_IMPR 0x980 > +#define CSR_IPCR(i) (0x984 + (i) * 4) > #define CSR_FCP_COMMAND 0xB00 > #define CSR_FCP_RESPONSE 0xD00 > #define CSR_FCP_END 0xF00 > @@ -441,5 +445,8 @@ int fw_iso_context_start(struct fw_iso_c > int cycle, int sync, int tags); > int fw_iso_context_stop(struct fw_iso_context *ctx); > void fw_iso_context_destroy(struct fw_iso_context *ctx); > +void fw_iso_resource_manage(struct fw_card *card, int generation, > + u64 channels_mask, int *channel, int *bandwidth, > + bool allocate, __be32 buffer[2]); > > #endif /* _LINUX_FIREWIRE_H */ [...] The firewire subsystem parts of this patch and their being routed through the ALSA development repository are fine with me. The export of fw_iso_resource_manage is also going to be needed by drivers/media/dvb/firewire/firedtv* eventually (maintained through the v4l-dvb tree), but I suppose my lack of development speed with firedtv will prevent any conflicts (which would be trivial to resolve in git anyway). Hence, Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> I am going to test this driver with LaCie FireWire Speakers and Griffin FireWave RSN. BTW, FireWave is a 6-channel-out device which is targeted to be used on OS X as either a stereo or a 5.1-Dolby-surround output. I heard that the 5.1 mode is configured by a vendor-specific AV/C command. (The FireWave was sold with an OS X driver; without this vendor driver it just works as a stereo-out soundcard with OS X' stock driver.) -- Stefan Richter -=====-==-== --=- --=== http://arcgraph.de/sr/ ------------------------------------------------------------------------------ The modern datacenter depends on network connectivity to access resources and provide services. The best practices for maximizing a physical server's connectivity to a physical network are well understood - see how these rules translate into the virtual world? http://p.sf.net/sfu/oracle-sfdevnlfb ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 14:40 ` Stefan Richter @ 2011-02-07 14:56 ` Clemens Ladisch 2011-02-07 21:56 ` Stefan Richter 1 sibling, 0 replies; 12+ messages in thread From: Clemens Ladisch @ 2011-02-07 14:56 UTC (permalink / raw) To: Stefan Richter; +Cc: alsa-devel, linux1394-devel, Jay Fenlason Stefan Richter wrote: > I am going to test this driver with LaCie FireWire Speakers and Griffin > FireWave RSN. BTW, FireWave is a 6-channel-out device which is targeted to > be used on OS X as either a stereo or a 5.1-Dolby-surround output. I heard > that the 5.1 mode is configured by a vendor-specific AV/C command. (The > FireWave was sold with an OS X driver; without this vendor driver it just > works as a stereo-out soundcard with OS X' stock driver.) Jay has already tested the FireWave in 6-channel mode; in fact, this was the only format that the previous patch supported for the FireWave. If OS X works with two channels without knowing that the device expects six, this implies that the device automatically detects the format of the incoming stream, and that sending Dolby data (which would just be two-channel data labeled as "SPDIF") should work too. Regards, Clemens ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 14:40 ` Stefan Richter 2011-02-07 14:56 ` Clemens Ladisch @ 2011-02-07 21:56 ` Stefan Richter 2011-02-08 8:05 ` Clemens Ladisch 2011-02-08 13:37 ` Clemens Ladisch 1 sibling, 2 replies; 12+ messages in thread From: Stefan Richter @ 2011-02-07 21:56 UTC (permalink / raw) To: Clemens Ladisch; +Cc: alsa-devel, linux1394-devel, Jay Fenlason Here are the results of a few quick smoke tests. First I attached FireWave and Speakers to my Mac mini and booted into OS X to make sure that this hardware still works. Both do. I don't have Griffin's driver installed. The FireWave puts out proper stereo sound on the L/R port, some muffled sound and pops on the C/S port, and nothing on the LS/RS port. The Speakers put out a loud tinny sound as expected from them. Rebooted into Linux (2.6.38-rc3). snd_firewire_speakers gets loaded right after I modprobed firewire-ohci, yet somehow no devices are bound to it. (I guess I will add some printks here to look closer onto the device probe under various circumstances.) Removed the speakers, and perhaps replugged the FireWave. They get bound, programs show them as sound card. Unloaded the snd_hda_intel driver to make testing easier. Xine, although configured to the alsa backend, somehow refuses to use the alsa backend and falls through to jack which doesn't have any devices present at the moment. Kaffeine which uses xine as backend pops up a window that it can't open the sound device. Audacious complains about missing mixer and can't use this sound card. KDE4's hardware control, sound pane, shows the card and lets me play the test sound on it. First few seconds are choppy. Shortly after the test sound faded I press teh test button again and get a kernel panic: BUG: unable to handle kernel paging request at [...] IP: [...] iso_packets_buffer_destroy+0x8/0x1d [snd_firewire_lib] [...] Call Trace: [...] amdtp_out_stream_stop+0x3b/0x46 [snd_firewire_lib] [...] I will send you a screenshot off list. Next test: Plugged the Speakers in, unloaded snd_hda_intel, loaded firewire-ohci, snd_firewire_speakers now gets bound to devie right away. Started xine and played a file. No complaint. (Hmm, I wonder whether I had an operator error in my earlier session with FireWave.) There is the same problem as in the first KDE4 control panel test: Playback starts with an Autechre remix during the first few seconds. ;-) Subsequent pause/resume or program exit/ program restart of xine do not feature the choppy lead in anymore. Audacious again pops up a window titled "ALSA error", saying "No suitable mixer element found." But it actually plays back now. Alas the missing mixer makes the whole affair not quite usable yet: The LaCie FireWire Speakers are very loud; too loud for the desk or living room. On OS X, I had their volume pulled down to the lowest mark. No kernel panic yet. Plugged Speakers out and FireWave in. Gets bound. Xine plays back, as does Audacious (which again first the missing mixer nag window). Alas there is choppy noise during the whole playback, with different audio sources. Reboot with FireWave plugged in. Same results as in the session before. The choppy noise apparently starts as soon as there was a louder part in the audio stream. This noise changes is pitch all the time along with the music. The Speakers don't seem to have that noise, but I can't really be sure because the building where I live in is not suitable to test them longer at full volume, at least not at this time of day. Still haven't reproduced the aforementioned kernel panic. ----- By the way, the ALSA subsystem is not sparse-clean if CF="-D__CHECK_ENDIAN__" is specified in the make command line. Sparse gets nervous about __bitwise types being used as integers. -- Stefan Richter -=====-==-== --=- --=== http://arcgraph.de/sr/ ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 21:56 ` Stefan Richter @ 2011-02-08 8:05 ` Clemens Ladisch 2011-02-08 13:37 ` Clemens Ladisch 1 sibling, 0 replies; 12+ messages in thread From: Clemens Ladisch @ 2011-02-08 8:05 UTC (permalink / raw) To: Stefan Richter; +Cc: alsa-devel, linux1394-devel, Jay Fenlason Stefan Richter wrote: > BUG: unable to handle kernel paging request at [...] > IP: [...] iso_packets_buffer_destroy+0x8/0x1d [snd_firewire_lib] > [...] > Call Trace: > [...] amdtp_out_stream_stop+0x3b/0x46 [snd_firewire_lib] > [...] f8cc3400: 55 push %ebp f8cc3401: 89 e5 mov %esp,%ebp f8cc3403: 53 push %ebx f8cc3404: 89 c3 mov %eax,%ebx f8cc3406: 8b 02 mov (%edx),%eax f8cc3408: <8b>50 fc mov -0x4(%eax),%edx f8cc340b: 89 d8 mov %ebx,%eax f8cc340d: e8 9a fe 02 00 call 0xf8cf32ac f8cc3412: 8b 43 0c mov 0xc(%ebx),%eax f8cc3415: e8 1f 62 3c c8 call 0xc1089639 f8cc341a: 5b pop %ebx f8cc341b: c9 leave f8cc341c: c3 ret The crash happens when iso_packets_buffer_destroy() tries to read fw_parent_device(unit)->card. b points to address 0xf3120c58, unit to 0xf1164df0. fw_parent_device(unit) results in 0xf12e8bf4, which looks more or less like a kmalloc()ed pointer, but is not correctly aligned if the standard buddy allocator is used, and turns out not to be in a valid address range. There must be a wrong pointer somewhere in this chain, but I have no clue where. Regards, Clemens ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 21:56 ` Stefan Richter 2011-02-08 8:05 ` Clemens Ladisch @ 2011-02-08 13:37 ` Clemens Ladisch 2011-02-08 21:10 ` Stefan Richter 1 sibling, 1 reply; 12+ messages in thread From: Clemens Ladisch @ 2011-02-08 13:37 UTC (permalink / raw) To: Stefan Richter; +Cc: alsa-devel, linux1394-devel, Jay Fenlason [-- Attachment #1: Type: text/plain, Size: 1744 bytes --] Stefan Richter wrote: > Xine, although configured to the alsa backend, somehow refuses to use the > alsa backend and falls through to jack which doesn't have any devices > present at the moment. Kaffeine which uses xine as backend pops up a > window that it can't open the sound device. Unfortunately, xine doesn't have useful error messages ... Try "aplay -D plughw:FireWave something.wav" (or -D plughw:Speakers). > KDE4's hardware control, sound pane, shows the card and lets me play the > test sound on it. First few seconds are choppy. [...] > > Next test: Plugged the Speakers in, unloaded snd_hda_intel, loaded > firewire-ohci, snd_firewire_speakers now gets bound to devie right away. > Started xine and played a file. No complaint. (Hmm, I wonder whether I > had an operator error in my earlier session with FireWave.) There is the > same problem as in the first KDE4 control panel test: Playback starts > with an Autechre remix during the first few seconds. ;-) If it is the same with both devices, the problem is probably not a wrong number of channels. Choppy sound could indicate a wrong sample rate. Jay used speaker-test, which uses 48 kHz by default, but most music files are 44.1 kHz, so it looks as if switching the sample rate does not work correctly. > Alas the missing mixer makes the whole affair not quite usable yet: The > LaCie FireWire Speakers are very loud; too loud for the desk or living > room. On OS X, I had their volume pulled down to the lowest mark. Attached are .conf files that enable software volume emulation for devices "default", "front", "surround40", and "surround51", but not "hw". Put them into /usr/share/alsa/cards/ (or wherever your distribution puts them). Regards, Clemens [-- Attachment #2: FWSpeakers.conf --] [-- Type: text/plain, Size: 516 bytes --] # # Configuration for the LaCie Firewire speakers # FWSpeakers.pcm.default { @args [ CARD ] @args.CARD { type string } type plug slave.pcm { type softvol slave.pcm { @func concat strings [ "dmix:" $CARD ",FORMAT=S32" ] } control { name "PCM Playback Volume" card $CARD } } } <confdir:pcm/front.conf> FWSpeakers.pcm.front.0 { @args [ CARD ] @args.CARD { type string } type softvol slave.pcm { type hw card $CARD } control { name "PCM Playback Volume" card $CARD } } [-- Attachment #3: FireWave.conf --] [-- Type: text/plain, Size: 1168 bytes --] # # Configuration for the Griffin FireWave Surround # FireWave.pcm.default { @args [ CARD ] @args.CARD { type string } type plug slave.pcm { type softvol slave.pcm { @func concat strings [ "dmix:" $CARD ",FORMAT=S32" ] } control { name "PCM Playback Volume" card $CARD } } } <confdir:pcm/front.conf> FireWave.pcm.front.0 { @args [ CARD ] @args.CARD { type string } type softvol slave.pcm { type hw card $CARD } control { name "PCM Playback Volume" card $CARD } } <confdir:pcm/surround40.conf> FireWave.pcm.surround40.0 { @args [ CARD ] @args.CARD { type string } type softvol slave.pcm { type hw card $CARD } control { name "PCM Playback Volume" card $CARD } } <confdir:pcm/surround41.conf> <confdir:pcm/surround50.conf> <confdir:pcm/surround51.conf> FireWave.pcm.surround51.0 { @args [ CARD ] @args.CARD { type string } type route ttable [ [ 1 0 0 0 0 0 ] [ 0 1 0 0 0 0 ] [ 0 0 0 0 1 0 ] [ 0 0 0 0 0 1 ] [ 0 0 1 0 0 0 ] [ 0 0 0 1 0 0 ] ] slave.pcm { type softvol slave.pcm { type hw card $CARD } control { name "PCM Playback Volume" card $CARD } } } [-- Attachment #4: Type: text/plain, Size: 160 bytes --] _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-08 13:37 ` Clemens Ladisch @ 2011-02-08 21:10 ` Stefan Richter 0 siblings, 0 replies; 12+ messages in thread From: Stefan Richter @ 2011-02-08 21:10 UTC (permalink / raw) To: Clemens Ladisch; +Cc: alsa-devel, linux1394-devel, Jay Fenlason On Feb 08 Clemens Ladisch wrote: > Stefan Richter wrote: > > Next test: Plugged the Speakers in, unloaded snd_hda_intel, loaded > > firewire-ohci, snd_firewire_speakers now gets bound to devie right away. > > Started xine and played a file. No complaint. (Hmm, I wonder whether I > > had an operator error in my earlier session with FireWave.) There is the > > same problem as in the first KDE4 control panel test: Playback starts > > with an Autechre remix during the first few seconds. ;-) I cannot reproduce the noise (clicks) at the start. But clicks or pops during playback are fully reproducible with the FireWave. I am not 100% sure but I think the Speakers are not affected. These clicks or pops occur at a fast rate whenever there is a louder passage in the sound stream. The pitch and rate of clicks or pops apparently depends on the spectrum of of the sound stream. They happen alongside the normal expected sound. > If it is the same with both devices, the problem is probably not a wrong > number of channels. > > Choppy sound could indicate a wrong sample rate. Jay used speaker-test, > which uses 48 kHz by default, but most music files are 44.1 kHz, so it > looks as if switching the sample rate does not work correctly. > > > Alas the missing mixer makes the whole affair not quite usable yet: The > > LaCie FireWire Speakers are very loud; too loud for the desk or living > > room. On OS X, I had their volume pulled down to the lowest mark. > > Attached are .conf files that enable software volume emulation for > devices "default", "front", "surround40", and "surround51", but not "hw". > Put them into /usr/share/alsa/cards/ (or wherever your distribution puts > them). This works indeed... most of the time. Eventually (after device replugs or driver reloading), somehow this software mixer/ volume control was not found anymore. It was back again in a later session. But I learned that Audacious has an option to add such a software mixer/ volume control itself. The effect of either way of volume control on the Speakers is that they become usable (as far as desktop speakers can be considered usable). The effect on the FireWave is that above mentioned clicks or pops are avoided if the volume is turned down far enough. However, at this state the right channel puts out a high-frequency tone, close to what I suspect is the upper frequency of the hearing capability of a well-maintained ear. The left channel doesn't do that. Furthermore, the muffled sound that the C/S port (the S channel) puts out under OS X by Apple's stock driver¹ does not occur under Linux. ¹) as if it was driven as a 2.1 system, but it is probably just accidental because it is too quiet and there are occasional pops on this channel -- Stefan Richter -=====-==-== --=- -=--- http://arcgraph.de/sr/ ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ mailing list linux1394-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux1394-devel ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 9:14 ` [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver Clemens Ladisch 2011-02-07 14:40 ` Stefan Richter @ 2011-02-07 16:49 ` Stefan Richter 2011-02-07 16:57 ` Clemens Ladisch 2011-02-10 9:46 ` [PATCH] " Clemens Ladisch 2 siblings, 1 reply; 12+ messages in thread From: Stefan Richter @ 2011-02-07 16:49 UTC (permalink / raw) To: Clemens Ladisch; +Cc: alsa-devel, linux1394-devel, Jay Fenlason On Feb 07 Clemens Ladisch wrote: > + static const struct device_info lacie_speakers = { > + .driver_name = "FWSpeakers", > + .short_name = "Firewire Speakers", > + .long_name = "LaCie Firewire Speakers", FWIW, it is spelled "LaCie FireWire Speakers" in LaCie's printed material and on their web site, whereas their firmware programmers put "LaCie Firewire speakers" as model descriptor leaf into the Configuration ROM. Does the precise case of device_info strings matter to userspace? -- Stefan Richter -=====-==-== --=- --=== http://arcgraph.de/sr/ ------------------------------------------------------------------------------ The modern datacenter depends on network connectivity to access resources and provide services. The best practices for maximizing a physical server's connectivity to a physical network are well understood - see how these rules translate into the virtual world? http://p.sf.net/sfu/oracle-sfdevnlfb ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 16:49 ` Stefan Richter @ 2011-02-07 16:57 ` Clemens Ladisch 0 siblings, 0 replies; 12+ messages in thread From: Clemens Ladisch @ 2011-02-07 16:57 UTC (permalink / raw) To: Stefan Richter; +Cc: alsa-devel, linux1394-devel, Jay Fenlason Stefan Richter wrote: > On Feb 07 Clemens Ladisch wrote: > > + static const struct device_info lacie_speakers = { > > + .driver_name = "FWSpeakers", > > + .short_name = "Firewire Speakers", > > + .long_name = "LaCie Firewire Speakers", > > FWIW, it is spelled "LaCie FireWire Speakers" in LaCie's printed material > and on their web site, whereas their firmware programmers put "LaCie > Firewire speakers" as model descriptor leaf into the Configuration ROM. I took the latter as model, but capitalized "Speakers" because it's a proper noun. I'll change it to "W". > Does the precise case of device_info strings matter to userspace? Only for the driver name. If I had used a common driver name for both, the .conf file would have to use the short name to differentiate them. The long name contains random junk (as far as everybody except PulseAudio is concerned). Regards, Clemens ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver 2011-02-07 9:14 ` [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver Clemens Ladisch 2011-02-07 14:40 ` Stefan Richter 2011-02-07 16:49 ` Stefan Richter @ 2011-02-10 9:46 ` Clemens Ladisch 2 siblings, 0 replies; 12+ messages in thread From: Clemens Ladisch @ 2011-02-10 9:46 UTC (permalink / raw) To: Stefan Richter, Jay Fenlason; +Cc: alsa-devel, linux1394-devel Add a driver for two playback-only FireWire devices based on the OXFW970 chip. v2: Better AMDTP API abstraction; fix fw_unit leak; small fixes. Two- and four-channel output on the FireWave is experimental. v3: cache the iPCR value to (hopefully) prevent FireWave hangs Signed-off-by: Clemens Ladisch <clemens@ladisch.de> --- drivers/firewire/core-iso.c | 1 drivers/firewire/core.h | 3 include/linux/firewire.h | 7 sound/Kconfig | 2 sound/Makefile | 2 sound/firewire/Kconfig | 25 + sound/firewire/Makefile | 6 sound/firewire/amdtp.c | 511 ++++++++++++++++++++++++++++++++ sound/firewire/amdtp.h | 151 +++++++++ sound/firewire/cmp.c | 298 ++++++++++++++++++ sound/firewire/cmp.h | 41 ++ sound/firewire/fcp.c | 223 +++++++++++++ sound/firewire/fcp.h | 12 sound/firewire/iso-resources.c | 224 ++++++++++++++ sound/firewire/iso-resources.h | 39 ++ sound/firewire/lib.c | 68 ++++ sound/firewire/lib.h | 19 + sound/firewire/packets-buffer.c | 74 ++++ sound/firewire/packets-buffer.h | 26 + sound/firewire/speakers.c | 484 ++++++++++++++++++++++++++++++ 20 files changed, 2212 insertions(+), 4 deletions(-) --- a/sound/Kconfig +++ b/sound/Kconfig @@ -97,6 +97,8 @@ source "sound/sh/Kconfig" # here assuming USB is defined before ALSA source "sound/usb/Kconfig" +source "sound/firewire/Kconfig" + # the following will depend on the order of config. # here assuming PCMCIA is defined before ALSA source "sound/pcmcia/Kconfig" --- a/sound/Makefile +++ b/sound/Makefile @@ -6,7 +6,7 @@ obj-$(CONFIG_SOUND_PRIME) += sound_firmw obj-$(CONFIG_SOUND_PRIME) += oss/ obj-$(CONFIG_DMASOUND) += oss/ obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \ - sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ + firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ obj-$(CONFIG_SND_AOA) += aoa/ # This one must be compilable even if sound is configured out --- /dev/null +++ b/sound/firewire/Kconfig @@ -0,0 +1,25 @@ +menuconfig SND_FIREWIRE + bool "FireWire sound devices" + depends on FIREWIRE + default y + help + Support for IEEE-1394/FireWire/iLink sound devices. + +if SND_FIREWIRE && FIREWIRE + +config SND_FIREWIRE_LIB + tristate + depends on SND_PCM + +config SND_FIREWIRE_SPEAKERS + tristate "FireWire speakers" + select SND_PCM + select SND_FIREWIRE_LIB + help + Say Y here to include support for the LaCie Firewire Speakers + and the Griffin FireWave Surround. + + To compile this driver as a module, choose M here: the module + will be called snd-firewire-speakers. + +endif # SND_FIREWIRE --- /dev/null +++ b/sound/firewire/Makefile @@ -0,0 +1,6 @@ +snd-firewire-lib-objs := lib.o iso-resources.o packets-buffer.o \ + fcp.o cmp.o amdtp.o +snd-firewire-speakers-objs := speakers.o + +obj-$(CONFIG_SND_FIREWIRE_LIB) += snd-firewire-lib.o +obj-$(CONFIG_SND_FIREWIRE_SPEAKERS) += snd-firewire-speakers.o --- a/drivers/firewire/core-iso.c +++ b/drivers/firewire/core-iso.c @@ -369,3 +369,4 @@ void fw_iso_resource_manage(struct fw_ca *channel = ret; } } +EXPORT_SYMBOL(fw_iso_resource_manage); --- a/drivers/firewire/core.h +++ b/drivers/firewire/core.h @@ -147,9 +147,6 @@ void fw_node_event(struct fw_card *card, /* -iso */ int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma); -void fw_iso_resource_manage(struct fw_card *card, int generation, - u64 channels_mask, int *channel, int *bandwidth, - bool allocate, __be32 buffer[2]); /* -topology */ --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -42,6 +42,10 @@ #define CSR_BROADCAST_CHANNEL 0x234 #define CSR_CONFIG_ROM 0x400 #define CSR_CONFIG_ROM_END 0x800 +#define CSR_OMPR 0x900 +#define CSR_OPCR(i) (0x904 + (i) * 4) +#define CSR_IMPR 0x980 +#define CSR_IPCR(i) (0x984 + (i) * 4) #define CSR_FCP_COMMAND 0xB00 #define CSR_FCP_RESPONSE 0xD00 #define CSR_FCP_END 0xF00 @@ -441,5 +445,8 @@ int fw_iso_context_start(struct fw_iso_c int cycle, int sync, int tags); int fw_iso_context_stop(struct fw_iso_context *ctx); void fw_iso_context_destroy(struct fw_iso_context *ctx); +void fw_iso_resource_manage(struct fw_card *card, int generation, + u64 channels_mask, int *channel, int *bandwidth, + bool allocate, __be32 buffer[2]); #endif /* _LINUX_FIREWIRE_H */ --- /dev/null +++ b/sound/firewire/cmp.c @@ -0,0 +1,298 @@ +/* + * Connection Management Procedures (IEC 61883-1) helper functions + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/module.h> +#include <linux/sched.h> +#include "lib.h" +#include "iso-resources.h" +#include "cmp.h" + +#define IMPR_SPEED_MASK 0xc0000000 +#define IMPR_SPEED_SHIFT 30 +#define IMPR_XSPEED_MASK 0x00000060 +#define IMPR_XSPEED_SHIFT 5 +#define IMPR_PLUGS_MASK 0x0000001f + +#define IPCR_ONLINE 0x80000000 +#define IPCR_BCAST_CONN 0x40000000 +#define IPCR_P2P_CONN_MASK 0x3f000000 +#define IPCR_P2P_CONN_SHIFT 24 +#define IPCR_CHANNEL_MASK 0x003f0000 +#define IPCR_CHANNEL_SHIFT 16 + +enum bus_reset_handling { + ABORT_ON_BUS_RESET, + SUCCEED_ON_BUS_RESET, +}; + +#define cmp_err(c, fmt, arg...) \ + dev_err(&(c)->resources.unit->device, fmt, ##arg) + +static int pcr_modify(struct cmp_connection *c, + __be32 (*modify)(struct cmp_connection *c, __be32 old), + int (*check)(struct cmp_connection *c, __be32 pcr), + enum bus_reset_handling bus_reset_handling) +{ + struct fw_device *device = fw_parent_device(c->resources.unit); + __be32 *buffer = c->resources.buffer; + int generation = c->resources.generation; + int rcode, errors = 0; + __be32 old_arg; + int err; + + buffer[0] = c->last_pcr_value; + for (;;) { + old_arg = buffer[0]; + buffer[1] = modify(c, buffer[0]); + + rcode = fw_run_transaction( + device->card, TCODE_LOCK_COMPARE_SWAP, + device->node_id, generation, device->max_speed, + CSR_REGISTER_BASE + CSR_IPCR(c->pcr_index), + buffer, 8); + + if (rcode == RCODE_COMPLETE) { + if (buffer[0] == old_arg) /* success? */ + break; + + if (check) { + err = check(c, buffer[0]); + if (err < 0) + return err; + } + } else if (rcode == RCODE_GENERATION) + goto bus_reset; + else if (rcode_is_permanent_error(rcode) || ++errors >= 3) + goto io_error; + } + c->last_pcr_value = buffer[0]; + + return 0; + +io_error: + cmp_err(c, "iPCR%u: transaction failed: %s\n", + c->pcr_index, rcode_string(rcode)); + return -EIO; + +bus_reset: + return bus_reset_handling == ABORT_ON_BUS_RESET ? -EAGAIN : 0; +} + + +/** + * cmp_connection_init - initializes a connection manager + * @c: the connection manager to initialize + * @unit: a unit of the target device + * @ipcr_index: the index of the iPCR on the target device + */ +int cmp_connection_init(struct cmp_connection* c, + struct fw_unit *unit, + unsigned int ipcr_index) +{ + __be32 impr_be; + u32 impr; + int err; + + err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST, + CSR_REGISTER_BASE + CSR_IMPR, + &impr_be, 4); + if (err < 0) + return err; + impr = be32_to_cpu(impr_be); + + if (ipcr_index >= (impr & IMPR_PLUGS_MASK)) + return -EINVAL; + + c->connected = false; + mutex_init(&c->mutex); + fw_iso_resources_init(&c->resources, unit); + c->last_pcr_value = cpu_to_be32(0x80000000); + c->pcr_index = ipcr_index; + c->max_speed = (impr & IMPR_SPEED_MASK) >> IMPR_SPEED_SHIFT; + if (c->max_speed == SCODE_BETA) + c->max_speed += (impr & IMPR_XSPEED_MASK) >> IMPR_XSPEED_SHIFT; + + return 0; +} +EXPORT_SYMBOL(cmp_connection_init); + +/** + * cmp_connection_destroy - free connection manager resources + * @c: the connection manager + */ +void cmp_connection_destroy(struct cmp_connection *c) +{ + WARN_ON(c->connected); + mutex_destroy(&c->mutex); + fw_iso_resources_destroy(&c->resources); +} +EXPORT_SYMBOL(cmp_connection_destroy); + + +static __be32 ipcr_set_modify(struct cmp_connection *c, __be32 ipcr) +{ + ipcr &= ~cpu_to_be32(IPCR_BCAST_CONN | + IPCR_P2P_CONN_MASK | + IPCR_CHANNEL_MASK); + ipcr |= cpu_to_be32(1 << IPCR_P2P_CONN_SHIFT); + ipcr |= cpu_to_be32(c->resources.channel << IPCR_CHANNEL_SHIFT); + + return ipcr; +} + +static int ipcr_set_check(struct cmp_connection *c, __be32 ipcr) +{ + if (ipcr & cpu_to_be32(IPCR_BCAST_CONN | + IPCR_P2P_CONN_MASK)) { + cmp_err(c, "iPCR%u: plug is already in use\n", c->pcr_index); + return -EBUSY; + } + if (!(ipcr & cpu_to_be32(IPCR_ONLINE))) { + cmp_err(c, "iPCR%u: plug is not on-line\n", c->pcr_index); + return -ECONNREFUSED; + } + + return 0; +} + +/** + * cmp_connection_establish - establish a connection to the target + * @c: the connection manager + * @max_payload_bytes: the amount of data (including CIP headers) per packet + * + * This function establishes a point-to-point connection from the local + * computer to the target by allocating isochronous resources (channel and + * bandwidth) and setting the target's input plug control register. When this + * function succeeds, the caller is responsible for starting transmitting + * packets. + */ +int cmp_connection_establish(struct cmp_connection *c, + unsigned int max_payload_bytes) +{ + int err; + + if (WARN_ON(c->connected)) + return -EISCONN; + + c->speed = min(c->max_speed, + fw_parent_device(c->resources.unit)->max_speed); + + mutex_lock(&c->mutex); + +retry_after_bus_reset: + err = fw_iso_resources_allocate(&c->resources, + max_payload_bytes, c->speed); + if (err < 0) + goto err_mutex; + + err = pcr_modify(c, ipcr_set_modify, ipcr_set_check, + ABORT_ON_BUS_RESET); + if (err == -EAGAIN) { + fw_iso_resources_free(&c->resources); + goto retry_after_bus_reset; + } + if (err < 0) + goto err_resources; + + c->connected = true; + + mutex_unlock(&c->mutex); + + return 0; + +err_resources: + fw_iso_resources_free(&c->resources); +err_mutex: + mutex_unlock(&c->mutex); + + return err; +} +EXPORT_SYMBOL(cmp_connection_establish); + +/** + * cmp_connection_update - update the connection after a bus reset + * @c: the connection manager + * + * This function must be called from the driver's .update handler to reestablish + * any connection that might have been active. + * + * Returns zero on success, or a negative error code. On an error, the + * connection is broken and the caller must stop transmitting iso packets. + */ +int cmp_connection_update(struct cmp_connection *c) +{ + int err; + + mutex_lock(&c->mutex); + + if (!c->connected) { + mutex_unlock(&c->mutex); + return 0; + } + + err = fw_iso_resources_update(&c->resources); + if (err < 0) + goto err_unconnect; + + err = pcr_modify(c, ipcr_set_modify, ipcr_set_check, + SUCCEED_ON_BUS_RESET); + if (err < 0) + goto err_resources; + + mutex_unlock(&c->mutex); + + return 0; + +err_resources: + fw_iso_resources_free(&c->resources); +err_unconnect: + c->connected = false; + mutex_unlock(&c->mutex); + + return err; +} +EXPORT_SYMBOL(cmp_connection_update); + + +static __be32 ipcr_break_modify(struct cmp_connection *c, __be32 ipcr) +{ + return ipcr & ~cpu_to_be32(IPCR_BCAST_CONN | IPCR_P2P_CONN_MASK); +} + +/** + * cmp_connection_break - break the connection to the target + * @c: the connection manager + * + * This function deactives the connection in the target's input plug control + * register, and frees the isochronous resources of the connection. Before + * calling this function, the caller should cease transmitting packets. + */ +void cmp_connection_break(struct cmp_connection *c) +{ + int err; + + mutex_lock(&c->mutex); + + if (!c->connected) { + mutex_unlock(&c->mutex); + return; + } + + err = pcr_modify(c, ipcr_break_modify, NULL, SUCCEED_ON_BUS_RESET); + if (err < 0) + cmp_err(c, "plug is still connected\n"); + + fw_iso_resources_free(&c->resources); + + c->connected = false; + + mutex_unlock(&c->mutex); +} +EXPORT_SYMBOL(cmp_connection_break); --- /dev/null +++ b/sound/firewire/cmp.h @@ -0,0 +1,41 @@ +#ifndef SOUND_FIREWIRE_CMP_H_INCLUDED +#define SOUND_FIREWIRE_CMP_H_INCLUDED + +#include <linux/mutex.h> +#include <linux/types.h> +#include "iso-resources.h" + +struct fw_unit; + +/** + * struct cmp_connection - manages an isochronous connection to a device + * @speed: the connection's actual speed + * + * This structure manages (using CMP) an isochronous stream from the local + * computer to a device's input plug (iPCR). + * + * There is no corresponding oPCR created on the local computer, so it is not + * possible to overlay connections on top of this one. + */ +struct cmp_connection { + int speed; + /* private: */ + bool connected; + struct mutex mutex; + struct fw_iso_resources resources; + __be32 last_pcr_value; + unsigned int pcr_index; + unsigned int max_speed; +}; + +int cmp_connection_init(struct cmp_connection* connection, + struct fw_unit *unit, + unsigned int ipcr_index); +void cmp_connection_destroy(struct cmp_connection *connection); + +int cmp_connection_establish(struct cmp_connection *connection, + unsigned int max_payload); +int cmp_connection_update(struct cmp_connection *connection); +void cmp_connection_break(struct cmp_connection *connection); + +#endif --- /dev/null +++ b/sound/firewire/fcp.c @@ -0,0 +1,223 @@ +/* + * Function Control Protocol (IEC 61883-1) helper functions + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/spinlock.h> +#include <linux/wait.h> +#include "fcp.h" +#include "lib.h" + +#define CTS_AVC 0x00 + +#define ERROR_RETRIES 3 +#define ERROR_DELAY_MS 5 +#define FCP_TIMEOUT_MS 125 + +static DEFINE_SPINLOCK(transactions_lock); +static LIST_HEAD(transactions); + +enum fcp_state { + STATE_PENDING, + STATE_BUS_RESET, + STATE_COMPLETE, +}; + +struct fcp_transaction { + struct list_head list; + struct fw_unit *unit; + void *response_buffer; + unsigned int response_size; + unsigned int response_match_bytes; + enum fcp_state state; + wait_queue_head_t wait; +}; + +/** + * fcp_avc_transaction - send an AV/C command and wait for its response + * @unit: a unit on the target device + * @command: a buffer containing the command frame; must be DMA-able + * @command_size: the size of @command + * @response: a buffer for the response frame + * @response_size: the maximum size of @response + * @response_match_bytes: a bitmap specifying the bytes used to detect the + * correct response frame + * + * This function sends a FCP command frame to the target and waits for the + * corresponding response frame to be returned. + * + * Because it is possible for multiple FCP transactions to be active at the + * same time, the correct response frame is detected by the value of certain + * bytes. These bytes must be set in @response before calling this function, + * and the corresponding bits must be set in @response_match_bytes. + * + * @command and @response can point to the same buffer. + * + * Asynchronous operation (INTERIM, NOTIFY) is not supported at the moment. + * + * Returns the actual size of the response frame, or a negative error code. + */ +int fcp_avc_transaction(struct fw_unit *unit, + const void *command, unsigned int command_size, + void *response, unsigned int response_size, + unsigned int response_match_bytes) +{ + struct fcp_transaction t; + int tcode, ret, tries = 0; + + t.unit = unit; + t.response_buffer = response; + t.response_size = response_size; + t.response_match_bytes = response_match_bytes; + t.state = STATE_PENDING; + init_waitqueue_head(&t.wait); + + spin_lock_irq(&transactions_lock); + list_add_tail(&t.list, &transactions); + spin_unlock_irq(&transactions_lock); + + for (;;) { + tcode = command_size == 4 ? TCODE_WRITE_QUADLET_REQUEST + : TCODE_WRITE_BLOCK_REQUEST; + ret = snd_fw_transaction(t.unit, tcode, + CSR_REGISTER_BASE + CSR_FCP_COMMAND, + (void *)command, command_size); + if (ret < 0) + break; + + wait_event_timeout(t.wait, t.state != STATE_PENDING, + msecs_to_jiffies(FCP_TIMEOUT_MS)); + + if (t.state == STATE_COMPLETE) { + ret = t.response_size; + break; + } else if (t.state == STATE_BUS_RESET) { + msleep(ERROR_DELAY_MS); + } else if (++tries >= ERROR_RETRIES) { + dev_err(&t.unit->device, "FCP command timed out\n"); + ret = -EIO; + break; + } + } + + spin_lock_irq(&transactions_lock); + list_del(&t.list); + spin_unlock_irq(&transactions_lock); + + return ret; +} +EXPORT_SYMBOL(fcp_avc_transaction); + +/** + * fcp_bus_reset - inform the target handler about a bus reset + * @unit: the unit that might be used by fcp_avc_transaction() + * + * This function must be called from the driver's .update handler to inform + * the FCP transaction handler that a bus reset has happened. Any pending FCP + * transactions are retried. + */ +void fcp_bus_reset(struct fw_unit *unit) +{ + struct fcp_transaction *t; + + spin_lock_irq(&transactions_lock); + list_for_each_entry(t, &transactions, list) { + if (t->unit == unit && + t->state == STATE_PENDING) { + t->state = STATE_BUS_RESET; + wake_up(&t->wait); + } + } + spin_unlock_irq(&transactions_lock); +} +EXPORT_SYMBOL(fcp_bus_reset); + +/* checks whether the response matches the masked bytes in response_buffer */ +static bool is_matching_response(struct fcp_transaction *transaction, + const void *response, size_t length) +{ + const u8 *p1, *p2; + unsigned int mask, i; + + p1 = response; + p2 = transaction->response_buffer; + mask = transaction->response_match_bytes; + + for (i = 0; ; ++i) { + if ((mask & 1) && p1[i] != p2[i]) + return false; + mask >>= 1; + if (!mask) + return true; + if (--length == 0) + return false; + } +} + +static void fcp_response(struct fw_card *card, struct fw_request *request, + int tcode, int destination, int source, + int generation, unsigned long long offset, + void *data, size_t length, void *callback_data) +{ + struct fcp_transaction *t; + unsigned long flags; + + if (length < 1 || (*(const u8 *)data & 0xf0) != CTS_AVC) + return; + + spin_lock_irqsave(&transactions_lock, flags); + list_for_each_entry(t, &transactions, list) { + struct fw_device *device = fw_parent_device(t->unit); + if (device->card != card || + device->generation != generation) + continue; + smp_rmb(); /* node_id vs. generation */ + if (device->node_id != source) + continue; + + if (t->state == STATE_PENDING && + is_matching_response(t, data, length)) { + t->state = STATE_COMPLETE; + t->response_size = min((unsigned int)length, + t->response_size); + memcpy(t->response_buffer, data, t->response_size); + wake_up(&t->wait); + } + } + spin_unlock_irqrestore(&transactions_lock, flags); +} + +static struct fw_address_handler response_register_handler = { + .length = 0x200, + .address_callback = fcp_response, +}; + +static int __init fcp_module_init(void) +{ + static const struct fw_address_region response_register_region = { + .start = CSR_REGISTER_BASE + CSR_FCP_RESPONSE, + .end = CSR_REGISTER_BASE + CSR_FCP_END, + }; + + fw_core_add_address_handler(&response_register_handler, + &response_register_region); + + return 0; +} + +static void __exit fcp_module_exit(void) +{ + WARN_ON(!list_empty(&transactions)); + fw_core_remove_address_handler(&response_register_handler); +} + +module_init(fcp_module_init); +module_exit(fcp_module_exit); --- /dev/null +++ b/sound/firewire/fcp.h @@ -0,0 +1,12 @@ +#ifndef SOUND_FIREWIRE_FCP_H_INCLUDED +#define SOUND_FIREWIRE_FCP_H_INCLUDED + +struct fw_unit; + +int fcp_avc_transaction(struct fw_unit *unit, + const void *command, unsigned int command_size, + void *response, unsigned int response_size, + unsigned int response_match_bytes); +void fcp_bus_reset(struct fw_unit *unit); + +#endif --- /dev/null +++ b/sound/firewire/speakers.c @@ -0,0 +1,484 @@ +/* + * OXFW970-based speakers driver + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/initval.h> +#include <sound/pcm.h> +#include "cmp.h" +#include "fcp.h" +#include "amdtp.h" +#include "lib.h" + +#define OXFORD_FIRMWARE_ID_ADDRESS (CSR_REGISTER_BASE + 0x50000) +/* 0x970?vvvv or 0x971?vvvv, where vvvv = firmware version */ + +#define OXFORD_HARDWARE_ID_ADDRESS (CSR_REGISTER_BASE + 0x90020) +#define OXFORD_HARDWARE_ID_OXFW970 0x39443841 +#define OXFORD_HARDWARE_ID_OXFW971 0x39373100 + +#define VENDOR_GRIFFIN 0x001292 +#define VENDOR_LACIE 0x00d04b + +#define SPECIFIER_1394TA 0x00a02d +#define VERSION_AVC 0x010001 + +struct device_info { + const char *driver_name; + const char *short_name; + const char *long_name; + unsigned int rates; + unsigned int channels_max; +}; + +struct fwspk { + struct snd_card *card; + struct fw_unit *unit; + const struct device_info *device_info; + struct snd_pcm_substream *pcm; + struct mutex mutex; + struct cmp_connection connection; + struct amdtp_out_stream stream; + bool stream_running; +}; + +MODULE_DESCRIPTION("FireWire speakers driver"); +MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); +MODULE_LICENSE("GPL v2"); + +static int fwspk_open(struct snd_pcm_substream *substream) +{ + static const struct snd_pcm_hardware hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER, + .formats = AMDTP_OUT_PCM_FORMAT_BITS, + .channels_min = 2, + .buffer_bytes_max = 16 * 1024 * 1024, + .period_bytes_min = 1, + .period_bytes_max = UINT_MAX, + .periods_min = 1, + .periods_max = UINT_MAX, + }; + struct fwspk *fwspk = substream->private_data; + int err; + + substream->runtime->hw = hardware; + substream->runtime->hw.rates = fwspk->device_info->rates; + substream->runtime->hw.channels_max = fwspk->device_info->channels_max; + + err = snd_pcm_limit_hw_rates(substream->runtime); + if (err < 0) + return err; + + err = snd_pcm_hw_constraint_step(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_CHANNELS, 2); + if (err < 0) + return err; + + err = snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIOD_TIME, + 5000, 8192000); + if (err < 0) + return err; + + err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24); + if (err < 0) + return err; + + return 0; +} + +static int fwspk_close(struct snd_pcm_substream *substream) +{ + return 0; +} + +static void fwspk_stop_stream(struct fwspk *fwspk) +{ + if (fwspk->stream_running) { + amdtp_out_stream_stop(&fwspk->stream); + cmp_connection_break(&fwspk->connection); + fwspk->stream_running = false; + } +} + +static int fwspk_set_rate(struct fwspk *fwspk, unsigned int sfc) +{ + u8 *buf; + int err; + + buf = kmalloc(8, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + buf[0] = 0x00; /* AV/C, CONTROL */ + buf[1] = 0xff; /* unit */ + buf[2] = 0x19; /* INPUT PLUG SIGNAL FORMAT */ + buf[3] = 0x00; /* plug 0 */ + buf[4] = 0x90; /* format: audio */ + buf[5] = 0x00 | sfc; /* AM824, frequency */ + buf[6] = 0xff; /* SYT (not used) */ + buf[7] = 0xff; + + err = fcp_avc_transaction(fwspk->unit, buf, 8, buf, 8, + BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5)); + if (err < 0) + goto error; + if (err < 6 || buf[0] != 0x09 /* ACCEPTED */) { + dev_err(&fwspk->unit->device, "failed to set sample rate\n"); + err = -EIO; + goto error; + } + + err = 0; + +error: + kfree(buf); + + return err; +} + +static int fwspk_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct fwspk *fwspk = substream->private_data; + int err; + + mutex_lock(&fwspk->mutex); + fwspk_stop_stream(fwspk); + mutex_unlock(&fwspk->mutex); + + err = snd_pcm_lib_alloc_vmalloc_buffer(substream, + params_buffer_bytes(hw_params)); + if (err < 0) + goto error; + + amdtp_out_stream_set_rate(&fwspk->stream, params_rate(hw_params)); + amdtp_out_stream_set_pcm(&fwspk->stream, params_channels(hw_params)); + + err = fwspk_set_rate(fwspk, fwspk->stream.sfc); + if (err < 0) + goto err_buffer; + + return 0; + +err_buffer: + snd_pcm_lib_free_vmalloc_buffer(substream); +error: + return err; +} + +static int fwspk_hw_free(struct snd_pcm_substream *substream) +{ + struct fwspk *fwspk = substream->private_data; + + mutex_lock(&fwspk->mutex); + fwspk_stop_stream(fwspk); + mutex_unlock(&fwspk->mutex); + + return snd_pcm_lib_free_vmalloc_buffer(substream); +} + +static int fwspk_prepare(struct snd_pcm_substream *substream) +{ + struct fwspk *fwspk = substream->private_data; + int err; + + mutex_lock(&fwspk->mutex); + + if (!fwspk->stream_running) { + err = cmp_connection_establish(&fwspk->connection, + amdtp_out_stream_get_max_payload(&fwspk->stream)); + if (err < 0) + goto err_mutex; + + err = amdtp_out_stream_start(&fwspk->stream, + fwspk->connection.resources.channel, + fwspk->connection.speed); + if (err < 0) + goto err_connection; + + fwspk->stream_running = true; + } + + mutex_unlock(&fwspk->mutex); + + amdtp_out_stream_pcm_prepare(&fwspk->stream); + + return 0; + +err_connection: + cmp_connection_break(&fwspk->connection); +err_mutex: + mutex_unlock(&fwspk->mutex); + + return err; +} + +static int fwspk_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct fwspk *fwspk = substream->private_data; + struct snd_pcm_substream *pcm; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + pcm = substream; + break; + case SNDRV_PCM_TRIGGER_STOP: + pcm = NULL; + break; + default: + return -EINVAL; + } + amdtp_out_stream_pcm_trigger(&fwspk->stream, pcm); + return 0; +} + +static snd_pcm_uframes_t fwspk_pointer(struct snd_pcm_substream *substream) +{ + struct fwspk *fwspk = substream->private_data; + + return amdtp_out_stream_pcm_pointer(&fwspk->stream); +} + +static int fwspk_create_pcm(struct fwspk *fwspk) +{ + static struct snd_pcm_ops ops = { + .open = fwspk_open, + .close = fwspk_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = fwspk_hw_params, + .hw_free = fwspk_hw_free, + .prepare = fwspk_prepare, + .trigger = fwspk_trigger, + .pointer = fwspk_pointer, + .page = snd_pcm_lib_get_vmalloc_page, + .mmap = snd_pcm_lib_mmap_vmalloc, + }; + struct snd_pcm *pcm; + int err; + + err = snd_pcm_new(fwspk->card, "OXFW970", 0, 1, 0, &pcm); + if (err < 0) + return err; + pcm->private_data = fwspk; + strcpy(pcm->name, fwspk->device_info->short_name); + fwspk->pcm = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; + fwspk->pcm->ops = &ops; + return 0; +} + +static u32 fwspk_read_firmware_version(struct fw_unit *unit) +{ + __be32 data; + int err; + + err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST, + OXFORD_FIRMWARE_ID_ADDRESS, &data, 4); + return err >= 0 ? be32_to_cpu(data) : 0; +} + +static void fwspk_card_free(struct snd_card *card) +{ + struct fwspk *fwspk = card->private_data; + + amdtp_out_stream_destroy(&fwspk->stream); + cmp_connection_destroy(&fwspk->connection); + fw_unit_put(fwspk->unit); + mutex_destroy(&fwspk->mutex); +} + +static const struct device_info *__devinit fwspk_detect(struct fw_device *dev) +{ + static const struct device_info griffin_firewave = { + .driver_name = "FireWave", + .short_name = "FireWave", + .long_name = "Griffin FireWave Surround", + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_96000, + .channels_max = 6, + }; + static const struct device_info lacie_speakers = { + .driver_name = "FWSpeakers", + .short_name = "FireWire Speakers", + .long_name = "LaCie FireWire Speakers", + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | + SNDRV_PCM_RATE_96000, + .channels_max = 2, + }; + struct fw_csr_iterator i; + int key, value; + + fw_csr_iterator_init(&i, dev->config_rom); + while (fw_csr_iterator_next(&i, &key, &value)) + if (key == CSR_VENDOR) + switch (value) { + case VENDOR_GRIFFIN: + return &griffin_firewave; + case VENDOR_LACIE: + return &lacie_speakers; + } + + return NULL; +} + +static int __devinit fwspk_probe(struct device *unit_dev) +{ + struct fw_unit *unit = fw_unit(unit_dev); + struct fw_device *fw_dev = fw_parent_device(unit); + struct snd_card *card; + struct fwspk *fwspk; + u32 firmware; + int err; + + err = snd_card_create(-1, NULL, THIS_MODULE, sizeof(*fwspk), &card); + if (err < 0) + return err; + snd_card_set_dev(card, unit_dev); + + fwspk = card->private_data; + fwspk->card = card; + mutex_init(&fwspk->mutex); + fwspk->unit = fw_unit_get(unit); + fwspk->device_info = fwspk_detect(fw_dev); + if (!fwspk->device_info) { + err = -ENODEV; + goto err_unit; + } + + err = cmp_connection_init(&fwspk->connection, unit, 0); + if (err < 0) + goto err_unit; + + err = amdtp_out_stream_init(&fwspk->stream, unit, CIP_NONBLOCKING); + if (err < 0) + goto err_connection; + + card->private_free = fwspk_card_free; + + strcpy(card->driver, fwspk->device_info->driver_name); + strcpy(card->shortname, fwspk->device_info->short_name); + firmware = fwspk_read_firmware_version(unit); + snprintf(card->longname, sizeof(card->longname), + "%s (OXFW%x %04x), GUID %08x%08x at %s, S%d", + fwspk->device_info->long_name, + firmware >> 20, firmware & 0xffff, + fw_dev->config_rom[3], fw_dev->config_rom[4], + dev_name(&unit->device), 100 << fw_dev->max_speed); + strcpy(card->mixername, "OXFW970"); + + err = fwspk_create_pcm(fwspk); + if (err < 0) + goto error; + + err = snd_card_register(card); + if (err < 0) + goto error; + + dev_set_drvdata(unit_dev, fwspk); + + return 0; + +err_connection: + cmp_connection_destroy(&fwspk->connection); +err_unit: + fw_unit_put(fwspk->unit); + mutex_destroy(&fwspk->mutex); +error: + snd_card_free(card); + return err; +} + +static int __devexit fwspk_remove(struct device *dev) +{ + struct fwspk *fwspk = dev_get_drvdata(dev); + + snd_card_disconnect(fwspk->card); + snd_card_free_when_closed(fwspk->card); + return 0; +} + +static void fwspk_bus_reset(struct fw_unit *unit) +{ + struct fwspk *fwspk = dev_get_drvdata(&unit->device); + + fcp_bus_reset(fwspk->unit); + + if (cmp_connection_update(&fwspk->connection) < 0) { + mutex_lock(&fwspk->mutex); + amdtp_out_stream_pcm_abort(&fwspk->stream); + fwspk_stop_stream(fwspk); + mutex_unlock(&fwspk->mutex); + return; + } + + amdtp_out_stream_update(&fwspk->stream); +} + +static const struct ieee1394_device_id fwspk_id_table[] = { + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION, + .vendor_id = VENDOR_GRIFFIN, + .model_id = 0x00f970, + .specifier_id = SPECIFIER_1394TA, + .version = VERSION_AVC, + }, + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION, + .vendor_id = VENDOR_LACIE, + .model_id = 0x00f970, + .specifier_id = SPECIFIER_1394TA, + .version = VERSION_AVC, + }, + { } +}; +MODULE_DEVICE_TABLE(ieee1394, fwspk_id_table); + +static struct fw_driver fwspk_driver = { + .driver = { + .owner = THIS_MODULE, + .name = KBUILD_MODNAME, + .bus = &fw_bus_type, + .probe = fwspk_probe, + .remove = __devexit_p(fwspk_remove), + }, + .update = fwspk_bus_reset, + .id_table = fwspk_id_table, +}; + +static int __init alsa_fwspk_init(void) +{ + return driver_register(&fwspk_driver.driver); +} + +static void __exit alsa_fwspk_exit(void) +{ + driver_unregister(&fwspk_driver.driver); +} + +module_init(alsa_fwspk_init); +module_exit(alsa_fwspk_exit); --- /dev/null +++ b/sound/firewire/lib.c @@ -0,0 +1,68 @@ +/* + * miscellaneous helper functions + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/module.h> +#include "lib.h" + +#define ERROR_RETRY_DELAY_MS 5 + +const char *rcode_string(unsigned int rcode) +{ + static const char *const names[] = { + [RCODE_COMPLETE] = "complete", + [RCODE_CONFLICT_ERROR] = "conflict error", + [RCODE_DATA_ERROR] = "data error", + [RCODE_TYPE_ERROR] = "type error", + [RCODE_ADDRESS_ERROR] = "address error", + [RCODE_SEND_ERROR] = "send error", + [RCODE_CANCELLED] = "cancelled", + [RCODE_BUSY] = "busy", + [RCODE_GENERATION] = "generation", + [RCODE_NO_ACK] = "no ack", + }; + + if (rcode < ARRAY_SIZE(names) && names[rcode]) + return names[rcode]; + else + return "unknown"; +} +EXPORT_SYMBOL(rcode_string); + +int snd_fw_transaction(struct fw_unit *unit, int tcode, + u64 offset, void *buffer, size_t length) +{ + struct fw_device *device = fw_parent_device(unit); + int generation, rcode, tries = 0; + + for (;;) { + generation = device->generation; + smp_rmb(); /* node_id vs. generation */ + rcode = fw_run_transaction(device->card, tcode, + device->node_id, generation, + device->max_speed, offset, + buffer, length); + + if (rcode == RCODE_COMPLETE) + return 0; + + if (rcode_is_permanent_error(rcode) || ++tries >= 3) { + dev_err(&unit->device, "transaction failed: %s\n", + rcode_string(rcode)); + return -EIO; + } + + msleep(ERROR_RETRY_DELAY_MS); + } +} +EXPORT_SYMBOL(snd_fw_transaction); + +MODULE_DESCRIPTION("FireWire audio helper functions"); +MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); +MODULE_LICENSE("GPL v2"); --- /dev/null +++ b/sound/firewire/lib.h @@ -0,0 +1,19 @@ +#ifndef SOUND_FIREWIRE_LIB_H_INCLUDED +#define SOUND_FIREWIRE_LIB_H_INCLUDED + +#include <linux/firewire-constants.h> +#include <linux/types.h> + +struct fw_unit; + +int snd_fw_transaction(struct fw_unit *unit, int tcode, + u64 offset, void *buffer, size_t length); +const char *rcode_string(unsigned int rcode); + +/* returns true if retrying the transaction would not make sense */ +static inline bool rcode_is_permanent_error(int rcode) +{ + return rcode == RCODE_TYPE_ERROR || rcode == RCODE_ADDRESS_ERROR; +} + +#endif --- /dev/null +++ b/sound/firewire/iso-resources.c @@ -0,0 +1,224 @@ +/* + * isochronous resources helper functions + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/jiffies.h> +#include <linux/mutex.h> +#include <linux/sched.h> +#include <linux/spinlock.h> +#include "iso-resources.h" + +/** + * fw_iso_resources_init - initializes a &struct fw_iso_resources + * @r: the resource manager to initialize + * @unit: the device unit for which the resources will be needed + * + * If the device does not support all channel numbers, change @r->channels_mask + * after calling this function. + */ +void fw_iso_resources_init(struct fw_iso_resources *r, struct fw_unit *unit) +{ + r->channels_mask = ~0uLL; + r->unit = fw_unit_get(unit); + mutex_init(&r->mutex); + r->allocated = false; +} + +/** + * fw_iso_resources_destroy - destroy a resource manager + * @r: the resource manager that is no longer needed + */ +void fw_iso_resources_destroy(struct fw_iso_resources *r) +{ + WARN_ON(r->allocated); + mutex_destroy(&r->mutex); + fw_unit_put(r->unit); +} + +static unsigned int packet_bandwidth(unsigned int max_payload_bytes, int speed) +{ + unsigned int bytes, s400_bytes; + + /* iso packets have three header quadlets and quadlet-aligned payload */ + bytes = 3 * 4 + ALIGN(max_payload_bytes, 4); + + /* convert to bandwidth units (quadlets at S1600 = bytes at S400) */ + if (speed <= SCODE_400) + s400_bytes = bytes * (1 << (SCODE_400 - speed)); + else + s400_bytes = DIV_ROUND_UP(bytes, 1 << (speed - SCODE_400)); + + return s400_bytes; +} + +static int current_bandwidth_overhead(struct fw_card *card) +{ + /* + * Under the usual pessimistic assumption (cable length 4.5 m), the + * isochronous overhead for N cables is 1.797 µs + N * 0.494 µs, or + * 88.3 + N * 24.3 in bandwidth units. + * + * The calculation below tries to deduce N from the current gap count. + * If the gap count has been optimized by measuring the actual packet + * transmission time, this derived overhead should be near the actual + * overhead as well. + */ + return card->gap_count * 97 / 10 + 89; +} + +static int wait_isoch_resource_delay_after_bus_reset(struct fw_card *card) +{ + for (;;) { + s64 delay = (card->reset_jiffies + HZ) - get_jiffies_64(); + if (delay <= 0) + return 0; + if (schedule_timeout_interruptible(delay) > 0) + return -ERESTARTSYS; + } +} + +/** + * fw_iso_resources_allocate - allocate isochronous channel and bandwidth + * @r: the resource manager + * @max_payload_bytes: the amount of data (including CIP headers) per packet + * @speed: the speed (e.g., SCODE_400) at which the packets will be sent + * + * This function allocates one isochronous channel and enough bandwidth for the + * specified packet size. + * + * Returns the channel number that the caller must use for streaming, or + * a negative error code. Due to potentionally long delays, this function is + * interruptible and can return -ERESTARTSYS. On success, the caller is + * responsible for calling fw_iso_resources_update() on bus resets, and + * fw_iso_resources_free() when the resources are not longer needed. + */ +int fw_iso_resources_allocate(struct fw_iso_resources *r, + unsigned int max_payload_bytes, int speed) +{ + struct fw_card *card = fw_parent_device(r->unit)->card; + int bandwidth, channel, err; + + if (WARN_ON(r->allocated)) + return -EBADFD; + + r->bandwidth = packet_bandwidth(max_payload_bytes, speed); + +retry_after_bus_reset: + spin_lock_irq(&card->lock); + r->generation = card->generation; + r->bandwidth_overhead = current_bandwidth_overhead(card); + spin_unlock_irq(&card->lock); + + err = wait_isoch_resource_delay_after_bus_reset(card); + if (err < 0) + return err; + + mutex_lock(&r->mutex); + + bandwidth = r->bandwidth + r->bandwidth_overhead; + fw_iso_resource_manage(card, r->generation, r->channels_mask, + &channel, &bandwidth, true, r->buffer); + if (channel == -EAGAIN) { + mutex_unlock(&r->mutex); + goto retry_after_bus_reset; + } + if (channel >= 0) { + r->channel = channel; + r->allocated = true; + } else { + if (channel == -EBUSY) + dev_err(&r->unit->device, + "isochronous resources exhausted\n"); + else + dev_err(&r->unit->device, + "isochronous resource allocation failed\n"); + } + + mutex_unlock(&r->mutex); + + return channel; +} + +/** + * fw_iso_resources_update - update resource allocations after a bus reset + * @r: the resource manager + * + * This function must be called from the driver's .update handler to reallocate + * any resources that were allocated before the bus reset. It is safe to call + * this function if no resources are currently allocated. + * + * Returns a negative error code on failure. If this happens, the caller must + * stop streaming. + */ +int fw_iso_resources_update(struct fw_iso_resources *r) +{ + struct fw_card *card = fw_parent_device(r->unit)->card; + int bandwidth, channel; + + mutex_lock(&r->mutex); + + if (!r->allocated) { + mutex_unlock(&r->mutex); + return 0; + } + + spin_lock_irq(&card->lock); + r->generation = card->generation; + r->bandwidth_overhead = current_bandwidth_overhead(card); + spin_unlock_irq(&card->lock); + + bandwidth = r->bandwidth + r->bandwidth_overhead; + + fw_iso_resource_manage(card, r->generation, 1uLL << r->channel, + &channel, &bandwidth, true, r->buffer); + /* + * When another bus reset happens, pretend that the allocation + * succeeded; we will try again for the new generation later. + */ + if (channel < 0 && channel != -EAGAIN) { + r->allocated = false; + if (channel == -EBUSY) + dev_err(&r->unit->device, + "isochronous resources exhausted\n"); + else + dev_err(&r->unit->device, + "isochronous resource allocation failed\n"); + } + + mutex_unlock(&r->mutex); + + return channel; +} + +/** + * fw_iso_resources_free - frees allocated resources + * @r: the resource manager + * + * This function deallocates the channel and bandwidth, if allocated. + */ +void fw_iso_resources_free(struct fw_iso_resources *r) +{ + struct fw_card *card = fw_parent_device(r->unit)->card; + int bandwidth, channel; + + mutex_lock(&r->mutex); + + if (r->allocated) { + bandwidth = r->bandwidth + r->bandwidth_overhead; + fw_iso_resource_manage(card, r->generation, 1uLL << r->channel, + &channel, &bandwidth, false, r->buffer); + if (channel < 0) + dev_err(&r->unit->device, + "isochronous resource deallocation failed\n"); + + r->allocated = false; + } + + mutex_unlock(&r->mutex); +} --- /dev/null +++ b/sound/firewire/iso-resources.h @@ -0,0 +1,39 @@ +#ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED +#define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED + +#include <linux/mutex.h> +#include <linux/types.h> + +struct fw_unit; + +/** + * struct fw_iso_resources - manages channel/bandwidth allocation + * @channels_mask: if the device does not support all channel numbers, set this + * bit mask to something else than the default (all ones) + * + * This structure manages (de)allocation of isochronous resources (channel and + * bandwidth) for one isochronous stream. + */ +struct fw_iso_resources { + u64 channels_mask; + /* private: */ + struct fw_unit *unit; + struct mutex mutex; + unsigned int channel; + unsigned int bandwidth; /* in bandwidth units, without overhead */ + unsigned int bandwidth_overhead; + int generation; /* in which allocation is valid */ + bool allocated; + __be32 buffer[2]; +}; + +void fw_iso_resources_init(struct fw_iso_resources *r, + struct fw_unit *unit); +void fw_iso_resources_destroy(struct fw_iso_resources *r); + +int fw_iso_resources_allocate(struct fw_iso_resources *r, + unsigned int max_payload_bytes, int speed); +int fw_iso_resources_update(struct fw_iso_resources *r); +void fw_iso_resources_free(struct fw_iso_resources *r); + +#endif --- /dev/null +++ b/sound/firewire/packets-buffer.c @@ -0,0 +1,74 @@ +/* + * helpers for managing a buffer for many packets + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/firewire.h> +#include <linux/slab.h> +#include "packets-buffer.h" + +/** + * iso_packets_buffer_init - allocates the memory for packets + * @b: the buffer structure to initialize + * @unit: the device at the other end of the stream + * @count: the number of packets + * @packet_size: the (maximum) size of a packet, in bytes + * @direction: %DMA_TO_DEVICE or %DMA_FROM_DEVICE + */ +int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit, + unsigned int count, unsigned int packet_size, + enum dma_data_direction direction) +{ + unsigned int packets_per_page, pages; + unsigned int i, page_index, offset_in_page; + void *p; + int err; + + b->packets = kmalloc(count * sizeof(*b->packets), GFP_KERNEL); + if (!b->packets) { + err = -ENOMEM; + goto error; + } + + packet_size = L1_CACHE_ALIGN(packet_size); + packets_per_page = PAGE_SIZE / packet_size; + if (WARN_ON(!packets_per_page)) { + err = -EINVAL; + goto error; + } + pages = DIV_ROUND_UP(count, packets_per_page); + + err = fw_iso_buffer_init(&b->iso_buffer, fw_parent_device(unit)->card, + pages, direction); + if (err < 0) + goto err_packets; + + for (i = 0; i < count; ++i) { + page_index = i / packets_per_page; + p = page_address(b->iso_buffer.pages[page_index]); + offset_in_page = (i % packets_per_page) * packet_size; + b->packets[i].buffer = p + offset_in_page; + b->packets[i].offset = page_index * PAGE_SIZE + offset_in_page; + } + + return 0; + +err_packets: + kfree(b->packets); +error: + return err; +} + +/** + * iso_packets_buffer_destroy - frees packet buffer resources + * @b: the buffer structure to free + * @unit: the device at the other end of the stream + */ +void iso_packets_buffer_destroy(struct iso_packets_buffer *b, + struct fw_unit *unit) +{ + fw_iso_buffer_destroy(&b->iso_buffer, fw_parent_device(unit)->card); + kfree(b->packets); +} --- /dev/null +++ b/sound/firewire/packets-buffer.h @@ -0,0 +1,26 @@ +#ifndef SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED +#define SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED + +#include <linux/dma-mapping.h> +#include <linux/firewire.h> + +/** + * struct iso_packets_buffer - manages a buffer for many packets + * @iso_buffer: the memory containing the packets + * @packets: an array, with each element pointing to one packet + */ +struct iso_packets_buffer { + struct fw_iso_buffer iso_buffer; + struct { + void *buffer; + unsigned int offset; + } *packets; +}; + +int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit, + unsigned int count, unsigned int packet_size, + enum dma_data_direction direction); +void iso_packets_buffer_destroy(struct iso_packets_buffer *b, + struct fw_unit *unit); + +#endif --- /dev/null +++ b/sound/firewire/amdtp.c @@ -0,0 +1,511 @@ +/* + * Audio and Music Data Transmission Protocol (IEC 61883-6) streams + * with Common Isochronous Packet (IEC 61883-1) headers + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/firewire.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <sound/pcm.h> +#include "amdtp.h" + +#define TICKS_PER_CYCLE 3072 +#define CYCLES_PER_SECOND 8000 +#define TICKS_PER_SECOND (TICKS_PER_CYCLE * CYCLES_PER_SECOND) + +#define TRANSFER_DELAY_TICKS 0x2e00 /* 479.17 µs */ + +#define TAG_CIP 1 + +#define CIP_EOH (1u << 31) +#define CIP_FMT_AM (0x10 << 24) +#define AMDTP_FDF_AM824 (0 << 19) +#define AMDTP_FDF_SFC_SHIFT 16 + +/* TODO: make these configurable */ +#define INTERRUPT_INTERVAL 16 +#define QUEUE_LENGTH 48 + +/** + * amdtp_out_stream_init - initialize an AMDTP output stream structure + * @s: the AMDTP output stream to initialize + * @unit: the target of the stream + * @flags: the packet transmission method to use + */ +int amdtp_out_stream_init(struct amdtp_out_stream *s, struct fw_unit *unit, + enum cip_out_flags flags) +{ + if (flags != CIP_NONBLOCKING) + return -EINVAL; + + s->unit = fw_unit_get(unit); + s->flags = flags; + s->context = ERR_PTR(-1); + mutex_init(&s->mutex); + + return 0; +} +EXPORT_SYMBOL(amdtp_out_stream_init); + +/** + * amdtp_out_stream_destroy - free stream resources + * @s: the AMDTP output stream to destroy + */ +void amdtp_out_stream_destroy(struct amdtp_out_stream *s) +{ + WARN_ON(!IS_ERR(s->context)); + mutex_destroy(&s->mutex); + fw_unit_put(s->unit); +} +EXPORT_SYMBOL(amdtp_out_stream_destroy); + +/** + * amdtp_out_stream_set_rate - configure the sampling frequency + * @s: the AMDTP output stream to configure + * @rate: 32000, 44100, 48000, 88200, 96000, 176400, or 192000 + * + * The stream rate must be set before the stream is started, and must not be + * changed while the stream is running. + */ +void amdtp_out_stream_set_rate(struct amdtp_out_stream *s, unsigned int rate) +{ + static const struct { + unsigned int rate; + unsigned int syt_interval; + } rate_info[] = { + [CIP_SFC_32000] = { 32000, 8, }, + [CIP_SFC_44100] = { 44100, 8, }, + [CIP_SFC_48000] = { 48000, 8, }, + [CIP_SFC_88200] = { 88200, 16, }, + [CIP_SFC_96000] = { 96000, 16, }, + [CIP_SFC_176400] = { 176400, 32, }, + [CIP_SFC_192000] = { 192000, 32, }, + }; + unsigned int sfc; + + if (WARN_ON(!IS_ERR(s->context))) + return; + + for (sfc = 0; sfc < ARRAY_SIZE(rate_info); ++sfc) + if (rate_info[sfc].rate == rate) { + s->sfc = sfc; + s->syt_interval = rate_info[sfc].syt_interval; + return; + } + WARN_ON(1); +} +EXPORT_SYMBOL(amdtp_out_stream_set_rate); + +/** + * amdtp_out_stream_get_max_payload - get the stream's packet size + * @s: the AMDTP output stream + * + * This function must not be called before the stream has been configured + * with amdtp_out_stream_set_rate(), amdtp_out_stream_set_pcm(), and + * amdtp_out_stream_set_midi(). + */ +unsigned int amdtp_out_stream_get_max_payload(struct amdtp_out_stream *s) +{ + static const unsigned int max_data_blocks[] = { + [CIP_SFC_32000] = 4, + [CIP_SFC_44100] = 6, + [CIP_SFC_48000] = 6, + [CIP_SFC_88200] = 12, + [CIP_SFC_96000] = 12, + [CIP_SFC_176400] = 23, + [CIP_SFC_192000] = 24, + }; + + s->data_block_quadlets = s->pcm_channels; + s->data_block_quadlets += DIV_ROUND_UP(s->midi_ports, 8); + + return 8 + max_data_blocks[s->sfc] * 4 * s->data_block_quadlets; +} +EXPORT_SYMBOL(amdtp_out_stream_get_max_payload); + +static unsigned int calculate_data_blocks(struct amdtp_out_stream *s) +{ + unsigned int phase, data_blocks; + + if (!cip_sfc_is_base_44100(s->sfc)) { + /* Sample_rate / 8000 is an integer, and precomputed. */ + data_blocks = s->data_block_state; + } else { + phase = s->data_block_state; + + /* + * This calculates the number of data blocks per packet so that + * 1) the overall rate is correct and exactly synchronized to + * the bus clock, and + * 2) packets with a rounded-up number of blocks occur as early + * as possible in the sequence (to prevent underruns of the + * device's buffer). + */ + if (s->sfc == CIP_SFC_44100) + /* 6 6 5 6 5 6 5 ... */ + data_blocks = 5 + ((phase & 1) ^ + (phase == 0 || phase >= 40)); + else + /* 12 11 11 11 11 ... or 23 22 22 22 22 ... */ + data_blocks = 11 * (s->sfc >> 1) + (phase == 0); + if (++phase >= (80 >> (s->sfc >> 1))) + phase = 0; + s->data_block_state = phase; + } + + return data_blocks; +} + +static unsigned int calculate_syt(struct amdtp_out_stream *s, unsigned int cycle) +{ + unsigned int syt_offset, phase, index, syt_index, tick_offset, syt; + + if (s->last_syt_offset < TICKS_PER_CYCLE) { + if (!cip_sfc_is_base_44100(s->sfc)) + syt_offset = s->last_syt_offset + s->syt_offset_state; + else { + /* + * The time, in ticks, of the n'th SYT_INTERVAL sample is: + * n * SYT_INTERVAL * 24576000 / sample_rate + * Modulo TICKS_PER_CYCLE, the difference between successive + * elements is about 1386.23. Rounding the results of this + * formula to the SYT precision results in a sequence of + * differences that begins with: + * 1386 1386 1387 1386 1386 1386 1387 1386 1386 1386 1387 ... + * This code generates _exactly_ the same sequence. + */ + phase = s->syt_offset_state; + index = phase % 13; + syt_offset = s->last_syt_offset; + syt_offset += 1386 + ((index && !(index & 3)) || + phase == 146); + if (++phase >= 147) + phase = 0; + s->syt_offset_state = phase; + } + } else + syt_offset = s->last_syt_offset - TICKS_PER_CYCLE; + s->last_syt_offset = syt_offset; + + syt_index = -s->data_block_counter & (s->syt_interval - 1); + tick_offset = TRANSFER_DELAY_TICKS - TICKS_PER_CYCLE + syt_offset; + syt = (cycle + tick_offset / TICKS_PER_CYCLE) << 12; + syt += tick_offset % TICKS_PER_CYCLE; + + return syt & 0xffff; +} + +static bool amdtp_fill_pcm(struct amdtp_out_stream *s, + __be32 *buffer, unsigned int frames) +{ + struct snd_pcm_runtime *runtime = s->pcm->runtime; + unsigned int channels, remaining_frames, frame_step, i, c, ptr; + const void *src; + + channels = s->pcm_channels; + src = runtime->dma_area + + s->pcm_buffer_pointer * (runtime->frame_bits / 8); + remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer; + frame_step = s->data_block_quadlets - channels; + + switch (runtime->format) { + case SNDRV_PCM_FORMAT_S32: + for (i = 0; i < frames; ++i) { + for (c = 0; c < channels; ++c) { + *buffer = cpu_to_be32((*(const u32 *)src >> 8) | + 0x40000000); + src += 4; + buffer++; + } + buffer += frame_step; + if (--remaining_frames == 0) + src = runtime->dma_area; + } + break; + + case SNDRV_PCM_FORMAT_S16: + for (i = 0; i < frames; ++i) { + for (c = 0; c < channels; ++c) { + *buffer = cpu_to_be32((*(const u16 *)src << 8) | + 0x40000000); + src += 2; + buffer++; + } + buffer += frame_step; + if (--remaining_frames == 0) + src = runtime->dma_area; + } + break; + } + + ptr = s->pcm_buffer_pointer + frames; + if (ptr >= runtime->buffer_size) + ptr -= runtime->buffer_size; + ACCESS_ONCE(s->pcm_buffer_pointer) = ptr; + + s->pcm_period_pointer += frames; + if (s->pcm_period_pointer >= runtime->period_size) { + s->pcm_period_pointer -= runtime->period_size; + return true; + } else + return false; +} + +static void amdtp_fill_pcm_silence(struct amdtp_out_stream *s, + __be32 *buffer, unsigned int frames) +{ + unsigned int i, c; + + for (i = 0; i < frames; ++i) { + for (c = 0; c < s->pcm_channels; ++c) + buffer[c] = cpu_to_be32(0x40000000); + buffer += s->data_block_quadlets; + } +} + +static void amdtp_fill_midi(struct amdtp_out_stream *s, + __be32 *buffer, unsigned int frames) +{ + unsigned int i; + + for (i = 0; i < frames; ++i) + buffer[s->pcm_channels + i * s->data_block_quadlets] = + cpu_to_be32(0x80000000); +} + +static void queue_out_packet(struct amdtp_out_stream *s, unsigned int cycle) +{ + __be32 *buffer; + unsigned int data_blocks, syt; + struct snd_pcm_substream *pcm; + bool pcm_period_elapsed; + struct fw_iso_packet packet; + int err; + + data_blocks = calculate_data_blocks(s); + syt = calculate_syt(s, cycle); + + buffer = s->buffer.packets[s->packet_counter].buffer; + buffer[0] = cpu_to_be32(ACCESS_ONCE(s->source_node_id_field) | + (s->data_block_quadlets << 16) | + s->data_block_counter); + buffer[1] = cpu_to_be32(CIP_EOH | CIP_FMT_AM | AMDTP_FDF_AM824 | + (s->sfc << AMDTP_FDF_SFC_SHIFT) | syt); + buffer += 2; + + pcm = ACCESS_ONCE(s->pcm); + if (pcm) + pcm_period_elapsed = amdtp_fill_pcm(s, buffer, data_blocks); + else { + amdtp_fill_pcm_silence(s, buffer, data_blocks); + pcm_period_elapsed = false; + } + if (s->midi_ports) + amdtp_fill_midi(s, buffer, data_blocks); + + s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff; + + packet.payload_length = 8 + data_blocks * 4 * s->data_block_quadlets; + packet.interrupt = IS_ALIGNED(s->packet_counter + 1, + INTERRUPT_INTERVAL); + packet.skip = 0; + packet.tag = TAG_CIP; + packet.sy = 0; + packet.header_length = 0; + + err = fw_iso_context_queue(s->context, &packet, &s->buffer.iso_buffer, + s->buffer.packets[s->packet_counter].offset); + if (err < 0) + dev_err(&s->unit->device, "queueing error: %d\n", err); + + if (++s->packet_counter >= QUEUE_LENGTH) + s->packet_counter = 0; + + if (pcm_period_elapsed) + snd_pcm_period_elapsed(pcm); +} + +static void out_packet_callback(struct fw_iso_context *context, u32 cycle, + size_t header_length, void *header, void *data) +{ + struct amdtp_out_stream *s = data; + unsigned int i, packets = header_length / 4; + + /* + * Compute the cycle of the last queued packet. + * (We need only the four lowest bits for the SYT, so we can ignore + * that bits 0-11 must wrap around at 3072.) + */ + cycle += QUEUE_LENGTH - packets; + + for (i = 0; i < packets; ++i) + queue_out_packet(s, ++cycle); +} + +static int queue_initial_skip_packets(struct amdtp_out_stream *s) +{ + struct fw_iso_packet skip_packet = { + .skip = 1, + }; + unsigned int i; + int err; + + for (i = 0; i < QUEUE_LENGTH; ++i) { + skip_packet.interrupt = IS_ALIGNED(s->packet_counter + 1, + INTERRUPT_INTERVAL); + err = fw_iso_context_queue(s->context, &skip_packet, NULL, 0); + if (err < 0) + return err; + if (++s->packet_counter >= QUEUE_LENGTH) + s->packet_counter = 0; + } + + return 0; +} + +/** + * amdtp_out_stream_start - start sending packets + * @s: the AMDTP output stream to start + * @channel: the isochronous channel on the bus + * @speed: firewire speed code + * + * The stream cannot be started until it has been configured with + * amdtp_out_stream_set_rate(), amdtp_out_stream_set_pcm(), and + * amdtp_out_stream_set_midi(); and it must be started before any + * PCM or MIDI device can be started. + */ +int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed) +{ + static const struct { + unsigned int data_block; + unsigned int syt_offset; + } initial_state[] = { + [CIP_SFC_32000] = { 4, 3072 }, + [CIP_SFC_48000] = { 6, 1024 }, + [CIP_SFC_96000] = { 12, 1024 }, + [CIP_SFC_192000] = { 24, 1024 }, + [CIP_SFC_44100] = { 0, 67 }, + [CIP_SFC_88200] = { 0, 67 }, + [CIP_SFC_176400] = { 0, 67 }, + }; + int err; + + mutex_lock(&s->mutex); + + if (WARN_ON(!IS_ERR(s->context) || + (!s->pcm_channels && !s->midi_ports))) { + err = -EBADFD; + goto err_unlock; + } + + s->data_block_state = initial_state[s->sfc].data_block; + s->syt_offset_state = initial_state[s->sfc].syt_offset; + s->last_syt_offset = TICKS_PER_CYCLE; + + err = iso_packets_buffer_init(&s->buffer, s->unit, QUEUE_LENGTH, + amdtp_out_stream_get_max_payload(s), + DMA_TO_DEVICE); + if (err < 0) + goto err_unlock; + + s->context = fw_iso_context_create(fw_parent_device(s->unit)->card, + FW_ISO_CONTEXT_TRANSMIT, + channel, speed, 0, + out_packet_callback, s); + if (IS_ERR(s->context)) { + err = PTR_ERR(s->context); + if (err == -EBUSY) + dev_err(&s->unit->device, + "no free output stream on this controller\n"); + goto err_buffer; + } + + amdtp_out_stream_update(s); + + s->packet_counter = 0; + s->data_block_counter = 0; + err = queue_initial_skip_packets(s); + if (err < 0) + goto err_context; + + err = fw_iso_context_start(s->context, -1, 0, 0); + if (err < 0) + goto err_context; + + mutex_unlock(&s->mutex); + + return 0; + +err_context: + fw_iso_context_destroy(s->context); + s->context = ERR_PTR(-1); +err_buffer: + iso_packets_buffer_destroy(&s->buffer, s->unit); +err_unlock: + mutex_unlock(&s->mutex); + + return err; +} +EXPORT_SYMBOL(amdtp_out_stream_start); + +/** + * amdtp_out_stream_update - update the stream after a bus reset + * @s: the AMDTP output stream + */ +void amdtp_out_stream_update(struct amdtp_out_stream *s) +{ + ACCESS_ONCE(s->source_node_id_field) = + (fw_parent_device(s->unit)->card->node_id & 0x3f) << 24; +} +EXPORT_SYMBOL(amdtp_out_stream_update); + +/** + * amdtp_out_stream_stop - stop sending packets + * @s: the AMDTP output stream to stop + * + * All PCM and MIDI devices of the stream must be stopped before the stream + * itself can be stopped. + */ +void amdtp_out_stream_stop(struct amdtp_out_stream *s) +{ + mutex_lock(&s->mutex); + + if (IS_ERR(s->context)) { + mutex_unlock(&s->mutex); + return; + } + + fw_iso_context_stop(s->context); + fw_iso_context_destroy(s->context); + s->context = ERR_PTR(-1); + iso_packets_buffer_destroy(&s->buffer, s->unit); + + mutex_unlock(&s->mutex); +} +EXPORT_SYMBOL(amdtp_out_stream_stop); + +/** + * amdtp_out_stream_pcm_abort - abort the running PCM device + * @s: the AMDTP stream about to be stopped + * + * If the isochronous stream needs to be stopped asynchronously, call this + * function first to stop the PCM device. + */ +void amdtp_out_stream_pcm_abort(struct amdtp_out_stream *s) +{ + struct snd_pcm_substream *pcm; + + pcm = ACCESS_ONCE(s->pcm); + if (pcm) { + snd_pcm_stream_lock_irq(pcm); + if (snd_pcm_running(pcm)) + snd_pcm_stop(pcm, SNDRV_PCM_STATE_XRUN); + snd_pcm_stream_unlock_irq(pcm); + } +} +EXPORT_SYMBOL(amdtp_out_stream_pcm_abort); --- /dev/null +++ b/sound/firewire/amdtp.h @@ -0,0 +1,151 @@ +#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED +#define SOUND_FIREWIRE_AMDTP_H_INCLUDED + +#include <linux/mutex.h> +#include <linux/spinlock.h> +#include "packets-buffer.h" + +/** + * enum cip_out_flags - describes details of the streaming protocol + * @CIP_NONBLOCKING: In non-blocking mode, each packet contains + * sample_rate/8000 samples, with rounding up or down to adjust + * for clock skew and left-over fractional samples. This should + * be used if supported by the device. + */ +enum cip_out_flags { + CIP_NONBLOCKING = 0, +}; + +/** + * enum cip_sfc - a stream's sample rate + */ +enum cip_sfc { + CIP_SFC_32000 = 0, + CIP_SFC_44100 = 1, + CIP_SFC_48000 = 2, + CIP_SFC_88200 = 3, + CIP_SFC_96000 = 4, + CIP_SFC_176400 = 5, + CIP_SFC_192000 = 6, +}; + +#define AMDTP_OUT_PCM_FORMAT_BITS (SNDRV_PCM_FMTBIT_S16 | \ + SNDRV_PCM_FMTBIT_S32) + +struct fw_unit; +struct fw_iso_context; +struct snd_pcm_substream; + +struct amdtp_out_stream { + struct fw_unit *unit; + enum cip_out_flags flags; + struct fw_iso_context *context; + struct mutex mutex; + + enum cip_sfc sfc; + unsigned int data_block_quadlets; + unsigned int pcm_channels; + unsigned int midi_ports; + + unsigned int syt_interval; + unsigned int source_node_id_field; + struct iso_packets_buffer buffer; + + struct snd_pcm_substream *pcm; + + unsigned int packet_counter; + unsigned int data_block_counter; + + unsigned int data_block_state; + + unsigned int last_syt_offset; + unsigned int syt_offset_state; + + unsigned int pcm_buffer_pointer; + unsigned int pcm_period_pointer; +}; + +int amdtp_out_stream_init(struct amdtp_out_stream *s, struct fw_unit *unit, + enum cip_out_flags flags); +void amdtp_out_stream_destroy(struct amdtp_out_stream *s); + +void amdtp_out_stream_set_rate(struct amdtp_out_stream *s, unsigned int rate); +unsigned int amdtp_out_stream_get_max_payload(struct amdtp_out_stream *s); + +int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed); +void amdtp_out_stream_update(struct amdtp_out_stream *s); +void amdtp_out_stream_stop(struct amdtp_out_stream *s); +void amdtp_out_stream_pcm_abort(struct amdtp_out_stream *s); + +/** + * amdtp_out_stream_set_pcm - configure format of PCM samples + * @s: the AMDTP output stream to be configured + * @pcm_channels: the number of PCM samples in each data block, to be encoded + * as AM824 multi-bit linear audio + * + * This function must not be called while the stream is running. + */ +static inline void amdtp_out_stream_set_pcm(struct amdtp_out_stream *s, + unsigned int pcm_channels) +{ + s->pcm_channels = pcm_channels; +} + +/** + * amdtp_out_stream_set_midi - configure format of MIDI data + * @s: the AMDTP output stream to be configured + * @midi_ports: the number of MIDI ports (i.e., MPX-MIDI Data Channels) + * + * This function must not be called while the stream is running. + */ +static inline void amdtp_out_stream_set_midi(struct amdtp_out_stream *s, + unsigned int midi_ports) +{ + s->midi_ports = midi_ports; +} + +/** + * amdtp_out_stream_pcm_prepare - prepare PCM device for running + * @s: the AMDTP output stream + * + * This function should be called from the PCM device's .prepare callback. + */ +static inline void amdtp_out_stream_pcm_prepare(struct amdtp_out_stream *s) +{ + s->pcm_buffer_pointer = 0; + s->pcm_period_pointer = 0; +} + +/** + * amdtp_out_stream_pcm_trigger - start/stop playback from a PCM device + * @s: the AMDTP output stream + * @pcm: the PCM device to be started, or %NULL to stop the current device + * + * Call this function on a running isochronous stream to enable the actual + * transmission of PCM data. This function should be called from the PCM + * device's .trigger callback. + */ +static inline void amdtp_out_stream_pcm_trigger(struct amdtp_out_stream *s, + struct snd_pcm_substream *pcm) +{ + ACCESS_ONCE(s->pcm) = pcm; +} + +/** + * amdtp_out_stream_pcm_pointer - get the PCM buffer position + * @s: the AMDTP output stream that transports the PCM data + * + * Returns the current buffer position, in frames. + */ +static inline unsigned long +amdtp_out_stream_pcm_pointer(struct amdtp_out_stream *s) +{ + return ACCESS_ONCE(s->pcm_buffer_pointer); +} + +static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc) +{ + return sfc & 1; +} + +#endif ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ mailing list linux1394-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux1394-devel ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 2/2] alsa-lib: add LaCie Firewire Speakers/Griffin FireWave Surround driver 2011-02-07 9:13 ` [PATCH 0/2] LaCie Firewire Speakers/Griffin FireWave support Clemens Ladisch 2011-02-07 9:14 ` [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver Clemens Ladisch @ 2011-02-07 9:14 ` Clemens Ladisch 1 sibling, 0 replies; 12+ messages in thread From: Clemens Ladisch @ 2011-02-07 9:14 UTC (permalink / raw) To: Stefan Richter, Jay Fenlason; +Cc: alsa-devel, linux1394-devel Add configuration files for the "default"/"front"/"surround40"/ "surround51" devices for the snd-firewire-speakers driver. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> --- src/conf/cards/Makefile.am | 2 + src/conf/cards/FWSpeakers.conf | 26 ++++++++++++++ src/conf/cards/FireWave.conf | 61 +++++++++++++++++++++++++++++++++ 3 files changed, 89 insertions(+) --- alsa-lib/src/conf/cards/Makefile.am +++ alsa-lib/src/conf/cards/Makefile.am @@ -25,6 +25,8 @@ cfg_files = aliases.conf \ ENS1371.conf \ ES1968.conf \ FM801.conf \ + FWSpeakers.conf \ + FireWave.conf \ GUS.conf \ HDA-Intel.conf \ ICE1712.conf \ --- /dev/null +++ alsa-lib/src/conf/cards/FWSpeakers.conf @@ -0,0 +1,26 @@ +# +# Configuration for the LaCie Firewire speakers +# + +FWSpeakers.pcm.default { + @args [ CARD ] + @args.CARD { + type string + } + type plug + slave.pcm { + @func concat + strings [ "dmix:" $CARD ",FORMAT=S32" ] + } +} + +<confdir:pcm/front.conf> + +FWSpeakers.pcm.front.0 { + @args [ CARD ] + @args.CARD { + type string + } + type hw + card $CARD +} --- /dev/null +++ alsa-lib/src/conf/cards/FireWave.conf @@ -0,0 +1,61 @@ +# +# Configuration for the Griffin FireWave Surround +# + +FireWave.pcm.default { + @args [ CARD ] + @args.CARD { + type string + } + type plug + slave.pcm { + @func concat + strings [ "dmix:" $CARD ",FORMAT=S32" ] + } +} + +<confdir:pcm/front.conf> + +FireWave.pcm.front.0 { + @args [ CARD ] + @args.CARD { + type string + } + type hw + card $CARD +} + +<confdir:pcm/surround40.conf> + +FireWave.pcm.surround40.0 { + @args [ CARD ] + @args.CARD { + type string + } + type hw + card $CARD +} + +<confdir:pcm/surround41.conf> +<confdir:pcm/surround50.conf> +<confdir:pcm/surround51.conf> + +FireWave.pcm.surround51.0 { + @args [ CARD ] + @args.CARD { + type string + } + type route + ttable [ + [ 1 0 0 0 0 0 ] + [ 0 1 0 0 0 0 ] + [ 0 0 0 0 1 0 ] + [ 0 0 0 0 0 1 ] + [ 0 0 1 0 0 0 ] + [ 0 0 0 1 0 0 ] + ] + slave.pcm { + type hw + card $CARD + } +} ^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2011-02-10 9:46 UTC | newest]
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[not found] <4D46933D.5050609@ladisch.de>
2011-02-07 9:13 ` [PATCH 0/2] LaCie Firewire Speakers/Griffin FireWave support Clemens Ladisch
2011-02-07 9:14 ` [PATCH 1/2] ALSA: add LaCie Firewire Speakers/Griffin FireWave surround driver Clemens Ladisch
2011-02-07 14:40 ` Stefan Richter
2011-02-07 14:56 ` Clemens Ladisch
2011-02-07 21:56 ` Stefan Richter
2011-02-08 8:05 ` Clemens Ladisch
2011-02-08 13:37 ` Clemens Ladisch
2011-02-08 21:10 ` Stefan Richter
2011-02-07 16:49 ` Stefan Richter
2011-02-07 16:57 ` Clemens Ladisch
2011-02-10 9:46 ` [PATCH] " Clemens Ladisch
2011-02-07 9:14 ` [PATCH 2/2] alsa-lib: add LaCie Firewire Speakers/Griffin FireWave Surround driver Clemens Ladisch
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