mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
738 lines
18 KiB
738 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Apple iSight audio driver |
|
* |
|
* Copyright (c) Clemens Ladisch <[email protected]> |
|
*/ |
|
|
|
#include <asm/byteorder.h> |
|
#include <linux/delay.h> |
|
#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/string.h> |
|
#include <sound/control.h> |
|
#include <sound/core.h> |
|
#include <sound/initval.h> |
|
#include <sound/pcm.h> |
|
#include <sound/tlv.h> |
|
#include "lib.h" |
|
#include "iso-resources.h" |
|
#include "packets-buffer.h" |
|
|
|
#define OUI_APPLE 0x000a27 |
|
#define MODEL_APPLE_ISIGHT 0x000008 |
|
#define SW_ISIGHT_AUDIO 0x000010 |
|
|
|
#define REG_AUDIO_ENABLE 0x000 |
|
#define AUDIO_ENABLE 0x80000000 |
|
#define REG_DEF_AUDIO_GAIN 0x204 |
|
#define REG_GAIN_RAW_START 0x210 |
|
#define REG_GAIN_RAW_END 0x214 |
|
#define REG_GAIN_DB_START 0x218 |
|
#define REG_GAIN_DB_END 0x21c |
|
#define REG_SAMPLE_RATE_INQUIRY 0x280 |
|
#define REG_ISO_TX_CONFIG 0x300 |
|
#define SPEED_SHIFT 16 |
|
#define REG_SAMPLE_RATE 0x400 |
|
#define RATE_48000 0x80000000 |
|
#define REG_GAIN 0x500 |
|
#define REG_MUTE 0x504 |
|
|
|
#define MAX_FRAMES_PER_PACKET 475 |
|
|
|
#define QUEUE_LENGTH 20 |
|
|
|
struct isight { |
|
struct snd_card *card; |
|
struct fw_unit *unit; |
|
struct fw_device *device; |
|
u64 audio_base; |
|
struct snd_pcm_substream *pcm; |
|
struct mutex mutex; |
|
struct iso_packets_buffer buffer; |
|
struct fw_iso_resources resources; |
|
struct fw_iso_context *context; |
|
bool pcm_active; |
|
bool pcm_running; |
|
bool first_packet; |
|
int packet_index; |
|
u32 total_samples; |
|
unsigned int buffer_pointer; |
|
unsigned int period_counter; |
|
s32 gain_min, gain_max; |
|
unsigned int gain_tlv[4]; |
|
}; |
|
|
|
struct audio_payload { |
|
__be32 sample_count; |
|
__be32 signature; |
|
__be32 sample_total; |
|
__be32 reserved; |
|
__be16 samples[2 * MAX_FRAMES_PER_PACKET]; |
|
}; |
|
|
|
MODULE_DESCRIPTION("iSight audio driver"); |
|
MODULE_AUTHOR("Clemens Ladisch <[email protected]>"); |
|
MODULE_LICENSE("GPL v2"); |
|
|
|
static struct fw_iso_packet audio_packet = { |
|
.payload_length = sizeof(struct audio_payload), |
|
.interrupt = 1, |
|
.header_length = 4, |
|
}; |
|
|
|
static void isight_update_pointers(struct isight *isight, unsigned int count) |
|
{ |
|
struct snd_pcm_runtime *runtime = isight->pcm->runtime; |
|
unsigned int ptr; |
|
|
|
smp_wmb(); /* update buffer data before buffer pointer */ |
|
|
|
ptr = isight->buffer_pointer; |
|
ptr += count; |
|
if (ptr >= runtime->buffer_size) |
|
ptr -= runtime->buffer_size; |
|
WRITE_ONCE(isight->buffer_pointer, ptr); |
|
|
|
isight->period_counter += count; |
|
if (isight->period_counter >= runtime->period_size) { |
|
isight->period_counter -= runtime->period_size; |
|
snd_pcm_period_elapsed(isight->pcm); |
|
} |
|
} |
|
|
|
static void isight_samples(struct isight *isight, |
|
const __be16 *samples, unsigned int count) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
unsigned int count1; |
|
|
|
if (!READ_ONCE(isight->pcm_running)) |
|
return; |
|
|
|
runtime = isight->pcm->runtime; |
|
if (isight->buffer_pointer + count <= runtime->buffer_size) { |
|
memcpy(runtime->dma_area + isight->buffer_pointer * 4, |
|
samples, count * 4); |
|
} else { |
|
count1 = runtime->buffer_size - isight->buffer_pointer; |
|
memcpy(runtime->dma_area + isight->buffer_pointer * 4, |
|
samples, count1 * 4); |
|
samples += count1 * 2; |
|
memcpy(runtime->dma_area, samples, (count - count1) * 4); |
|
} |
|
|
|
isight_update_pointers(isight, count); |
|
} |
|
|
|
static void isight_pcm_abort(struct isight *isight) |
|
{ |
|
if (READ_ONCE(isight->pcm_active)) |
|
snd_pcm_stop_xrun(isight->pcm); |
|
} |
|
|
|
static void isight_dropped_samples(struct isight *isight, unsigned int total) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
u32 dropped; |
|
unsigned int count1; |
|
|
|
if (!READ_ONCE(isight->pcm_running)) |
|
return; |
|
|
|
runtime = isight->pcm->runtime; |
|
dropped = total - isight->total_samples; |
|
if (dropped < runtime->buffer_size) { |
|
if (isight->buffer_pointer + dropped <= runtime->buffer_size) { |
|
memset(runtime->dma_area + isight->buffer_pointer * 4, |
|
0, dropped * 4); |
|
} else { |
|
count1 = runtime->buffer_size - isight->buffer_pointer; |
|
memset(runtime->dma_area + isight->buffer_pointer * 4, |
|
0, count1 * 4); |
|
memset(runtime->dma_area, 0, (dropped - count1) * 4); |
|
} |
|
isight_update_pointers(isight, dropped); |
|
} else { |
|
isight_pcm_abort(isight); |
|
} |
|
} |
|
|
|
static void isight_packet(struct fw_iso_context *context, u32 cycle, |
|
size_t header_length, void *header, void *data) |
|
{ |
|
struct isight *isight = data; |
|
const struct audio_payload *payload; |
|
unsigned int index, length, count, total; |
|
int err; |
|
|
|
if (isight->packet_index < 0) |
|
return; |
|
index = isight->packet_index; |
|
payload = isight->buffer.packets[index].buffer; |
|
length = be32_to_cpup(header) >> 16; |
|
|
|
if (likely(length >= 16 && |
|
payload->signature == cpu_to_be32(0x73676874/*"sght"*/))) { |
|
count = be32_to_cpu(payload->sample_count); |
|
if (likely(count <= (length - 16) / 4)) { |
|
total = be32_to_cpu(payload->sample_total); |
|
if (unlikely(total != isight->total_samples)) { |
|
if (!isight->first_packet) |
|
isight_dropped_samples(isight, total); |
|
isight->first_packet = false; |
|
isight->total_samples = total; |
|
} |
|
|
|
isight_samples(isight, payload->samples, count); |
|
isight->total_samples += count; |
|
} |
|
} |
|
|
|
err = fw_iso_context_queue(isight->context, &audio_packet, |
|
&isight->buffer.iso_buffer, |
|
isight->buffer.packets[index].offset); |
|
if (err < 0) { |
|
dev_err(&isight->unit->device, "queueing error: %d\n", err); |
|
isight_pcm_abort(isight); |
|
isight->packet_index = -1; |
|
return; |
|
} |
|
fw_iso_context_queue_flush(isight->context); |
|
|
|
if (++index >= QUEUE_LENGTH) |
|
index = 0; |
|
isight->packet_index = index; |
|
} |
|
|
|
static int isight_connect(struct isight *isight) |
|
{ |
|
int ch, err; |
|
__be32 value; |
|
|
|
retry_after_bus_reset: |
|
ch = fw_iso_resources_allocate(&isight->resources, |
|
sizeof(struct audio_payload), |
|
isight->device->max_speed); |
|
if (ch < 0) { |
|
err = ch; |
|
goto error; |
|
} |
|
|
|
value = cpu_to_be32(ch | (isight->device->max_speed << SPEED_SHIFT)); |
|
err = snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST, |
|
isight->audio_base + REG_ISO_TX_CONFIG, |
|
&value, 4, FW_FIXED_GENERATION | |
|
isight->resources.generation); |
|
if (err == -EAGAIN) { |
|
fw_iso_resources_free(&isight->resources); |
|
goto retry_after_bus_reset; |
|
} else if (err < 0) { |
|
goto err_resources; |
|
} |
|
|
|
return 0; |
|
|
|
err_resources: |
|
fw_iso_resources_free(&isight->resources); |
|
error: |
|
return err; |
|
} |
|
|
|
static int isight_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 = SNDRV_PCM_FMTBIT_S16_BE, |
|
.rates = SNDRV_PCM_RATE_48000, |
|
.rate_min = 48000, |
|
.rate_max = 48000, |
|
.channels_min = 2, |
|
.channels_max = 2, |
|
.buffer_bytes_max = 4 * 1024 * 1024, |
|
.period_bytes_min = MAX_FRAMES_PER_PACKET * 4, |
|
.period_bytes_max = 1024 * 1024, |
|
.periods_min = 2, |
|
.periods_max = UINT_MAX, |
|
}; |
|
struct isight *isight = substream->private_data; |
|
|
|
substream->runtime->hw = hardware; |
|
|
|
return iso_packets_buffer_init(&isight->buffer, isight->unit, |
|
QUEUE_LENGTH, |
|
sizeof(struct audio_payload), |
|
DMA_FROM_DEVICE); |
|
} |
|
|
|
static int isight_close(struct snd_pcm_substream *substream) |
|
{ |
|
struct isight *isight = substream->private_data; |
|
|
|
iso_packets_buffer_destroy(&isight->buffer, isight->unit); |
|
|
|
return 0; |
|
} |
|
|
|
static int isight_hw_params(struct snd_pcm_substream *substream, |
|
struct snd_pcm_hw_params *hw_params) |
|
{ |
|
struct isight *isight = substream->private_data; |
|
|
|
WRITE_ONCE(isight->pcm_active, true); |
|
|
|
return 0; |
|
} |
|
|
|
static int reg_read(struct isight *isight, int offset, __be32 *value) |
|
{ |
|
return snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST, |
|
isight->audio_base + offset, value, 4, 0); |
|
} |
|
|
|
static int reg_write(struct isight *isight, int offset, __be32 value) |
|
{ |
|
return snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST, |
|
isight->audio_base + offset, &value, 4, 0); |
|
} |
|
|
|
static void isight_stop_streaming(struct isight *isight) |
|
{ |
|
__be32 value; |
|
|
|
if (!isight->context) |
|
return; |
|
|
|
fw_iso_context_stop(isight->context); |
|
fw_iso_context_destroy(isight->context); |
|
isight->context = NULL; |
|
fw_iso_resources_free(&isight->resources); |
|
value = 0; |
|
snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST, |
|
isight->audio_base + REG_AUDIO_ENABLE, |
|
&value, 4, FW_QUIET); |
|
} |
|
|
|
static int isight_hw_free(struct snd_pcm_substream *substream) |
|
{ |
|
struct isight *isight = substream->private_data; |
|
|
|
WRITE_ONCE(isight->pcm_active, false); |
|
|
|
mutex_lock(&isight->mutex); |
|
isight_stop_streaming(isight); |
|
mutex_unlock(&isight->mutex); |
|
|
|
return 0; |
|
} |
|
|
|
static int isight_start_streaming(struct isight *isight) |
|
{ |
|
unsigned int i; |
|
int err; |
|
|
|
if (isight->context) { |
|
if (isight->packet_index < 0) |
|
isight_stop_streaming(isight); |
|
else |
|
return 0; |
|
} |
|
|
|
err = reg_write(isight, REG_SAMPLE_RATE, cpu_to_be32(RATE_48000)); |
|
if (err < 0) |
|
goto error; |
|
|
|
err = isight_connect(isight); |
|
if (err < 0) |
|
goto error; |
|
|
|
err = reg_write(isight, REG_AUDIO_ENABLE, cpu_to_be32(AUDIO_ENABLE)); |
|
if (err < 0) |
|
goto err_resources; |
|
|
|
isight->context = fw_iso_context_create(isight->device->card, |
|
FW_ISO_CONTEXT_RECEIVE, |
|
isight->resources.channel, |
|
isight->device->max_speed, |
|
4, isight_packet, isight); |
|
if (IS_ERR(isight->context)) { |
|
err = PTR_ERR(isight->context); |
|
isight->context = NULL; |
|
goto err_resources; |
|
} |
|
|
|
for (i = 0; i < QUEUE_LENGTH; ++i) { |
|
err = fw_iso_context_queue(isight->context, &audio_packet, |
|
&isight->buffer.iso_buffer, |
|
isight->buffer.packets[i].offset); |
|
if (err < 0) |
|
goto err_context; |
|
} |
|
|
|
isight->first_packet = true; |
|
isight->packet_index = 0; |
|
|
|
err = fw_iso_context_start(isight->context, -1, 0, |
|
FW_ISO_CONTEXT_MATCH_ALL_TAGS/*?*/); |
|
if (err < 0) |
|
goto err_context; |
|
|
|
return 0; |
|
|
|
err_context: |
|
fw_iso_context_destroy(isight->context); |
|
isight->context = NULL; |
|
err_resources: |
|
fw_iso_resources_free(&isight->resources); |
|
reg_write(isight, REG_AUDIO_ENABLE, 0); |
|
error: |
|
return err; |
|
} |
|
|
|
static int isight_prepare(struct snd_pcm_substream *substream) |
|
{ |
|
struct isight *isight = substream->private_data; |
|
int err; |
|
|
|
isight->buffer_pointer = 0; |
|
isight->period_counter = 0; |
|
|
|
mutex_lock(&isight->mutex); |
|
err = isight_start_streaming(isight); |
|
mutex_unlock(&isight->mutex); |
|
|
|
return err; |
|
} |
|
|
|
static int isight_trigger(struct snd_pcm_substream *substream, int cmd) |
|
{ |
|
struct isight *isight = substream->private_data; |
|
|
|
switch (cmd) { |
|
case SNDRV_PCM_TRIGGER_START: |
|
WRITE_ONCE(isight->pcm_running, true); |
|
break; |
|
case SNDRV_PCM_TRIGGER_STOP: |
|
WRITE_ONCE(isight->pcm_running, false); |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
return 0; |
|
} |
|
|
|
static snd_pcm_uframes_t isight_pointer(struct snd_pcm_substream *substream) |
|
{ |
|
struct isight *isight = substream->private_data; |
|
|
|
return READ_ONCE(isight->buffer_pointer); |
|
} |
|
|
|
static int isight_create_pcm(struct isight *isight) |
|
{ |
|
static const struct snd_pcm_ops ops = { |
|
.open = isight_open, |
|
.close = isight_close, |
|
.hw_params = isight_hw_params, |
|
.hw_free = isight_hw_free, |
|
.prepare = isight_prepare, |
|
.trigger = isight_trigger, |
|
.pointer = isight_pointer, |
|
}; |
|
struct snd_pcm *pcm; |
|
int err; |
|
|
|
err = snd_pcm_new(isight->card, "iSight", 0, 0, 1, &pcm); |
|
if (err < 0) |
|
return err; |
|
pcm->private_data = isight; |
|
strcpy(pcm->name, "iSight"); |
|
isight->pcm = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; |
|
isight->pcm->ops = &ops; |
|
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); |
|
|
|
return 0; |
|
} |
|
|
|
static int isight_gain_info(struct snd_kcontrol *ctl, |
|
struct snd_ctl_elem_info *info) |
|
{ |
|
struct isight *isight = ctl->private_data; |
|
|
|
info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
|
info->count = 1; |
|
info->value.integer.min = isight->gain_min; |
|
info->value.integer.max = isight->gain_max; |
|
|
|
return 0; |
|
} |
|
|
|
static int isight_gain_get(struct snd_kcontrol *ctl, |
|
struct snd_ctl_elem_value *value) |
|
{ |
|
struct isight *isight = ctl->private_data; |
|
__be32 gain; |
|
int err; |
|
|
|
err = reg_read(isight, REG_GAIN, &gain); |
|
if (err < 0) |
|
return err; |
|
|
|
value->value.integer.value[0] = (s32)be32_to_cpu(gain); |
|
|
|
return 0; |
|
} |
|
|
|
static int isight_gain_put(struct snd_kcontrol *ctl, |
|
struct snd_ctl_elem_value *value) |
|
{ |
|
struct isight *isight = ctl->private_data; |
|
|
|
if (value->value.integer.value[0] < isight->gain_min || |
|
value->value.integer.value[0] > isight->gain_max) |
|
return -EINVAL; |
|
|
|
return reg_write(isight, REG_GAIN, |
|
cpu_to_be32(value->value.integer.value[0])); |
|
} |
|
|
|
static int isight_mute_get(struct snd_kcontrol *ctl, |
|
struct snd_ctl_elem_value *value) |
|
{ |
|
struct isight *isight = ctl->private_data; |
|
__be32 mute; |
|
int err; |
|
|
|
err = reg_read(isight, REG_MUTE, &mute); |
|
if (err < 0) |
|
return err; |
|
|
|
value->value.integer.value[0] = !mute; |
|
|
|
return 0; |
|
} |
|
|
|
static int isight_mute_put(struct snd_kcontrol *ctl, |
|
struct snd_ctl_elem_value *value) |
|
{ |
|
struct isight *isight = ctl->private_data; |
|
|
|
return reg_write(isight, REG_MUTE, |
|
(__force __be32)!value->value.integer.value[0]); |
|
} |
|
|
|
static int isight_create_mixer(struct isight *isight) |
|
{ |
|
static const struct snd_kcontrol_new gain_control = { |
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
|
.name = "Mic Capture Volume", |
|
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | |
|
SNDRV_CTL_ELEM_ACCESS_TLV_READ, |
|
.info = isight_gain_info, |
|
.get = isight_gain_get, |
|
.put = isight_gain_put, |
|
}; |
|
static const struct snd_kcontrol_new mute_control = { |
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
|
.name = "Mic Capture Switch", |
|
.info = snd_ctl_boolean_mono_info, |
|
.get = isight_mute_get, |
|
.put = isight_mute_put, |
|
}; |
|
__be32 value; |
|
struct snd_kcontrol *ctl; |
|
int err; |
|
|
|
err = reg_read(isight, REG_GAIN_RAW_START, &value); |
|
if (err < 0) |
|
return err; |
|
isight->gain_min = be32_to_cpu(value); |
|
|
|
err = reg_read(isight, REG_GAIN_RAW_END, &value); |
|
if (err < 0) |
|
return err; |
|
isight->gain_max = be32_to_cpu(value); |
|
|
|
isight->gain_tlv[SNDRV_CTL_TLVO_TYPE] = SNDRV_CTL_TLVT_DB_MINMAX; |
|
isight->gain_tlv[SNDRV_CTL_TLVO_LEN] = 2 * sizeof(unsigned int); |
|
|
|
err = reg_read(isight, REG_GAIN_DB_START, &value); |
|
if (err < 0) |
|
return err; |
|
isight->gain_tlv[SNDRV_CTL_TLVO_DB_MINMAX_MIN] = |
|
(s32)be32_to_cpu(value) * 100; |
|
|
|
err = reg_read(isight, REG_GAIN_DB_END, &value); |
|
if (err < 0) |
|
return err; |
|
isight->gain_tlv[SNDRV_CTL_TLVO_DB_MINMAX_MAX] = |
|
(s32)be32_to_cpu(value) * 100; |
|
|
|
ctl = snd_ctl_new1(&gain_control, isight); |
|
if (ctl) |
|
ctl->tlv.p = isight->gain_tlv; |
|
err = snd_ctl_add(isight->card, ctl); |
|
if (err < 0) |
|
return err; |
|
|
|
err = snd_ctl_add(isight->card, snd_ctl_new1(&mute_control, isight)); |
|
if (err < 0) |
|
return err; |
|
|
|
return 0; |
|
} |
|
|
|
static void isight_card_free(struct snd_card *card) |
|
{ |
|
struct isight *isight = card->private_data; |
|
|
|
fw_iso_resources_destroy(&isight->resources); |
|
} |
|
|
|
static u64 get_unit_base(struct fw_unit *unit) |
|
{ |
|
struct fw_csr_iterator i; |
|
int key, value; |
|
|
|
fw_csr_iterator_init(&i, unit->directory); |
|
while (fw_csr_iterator_next(&i, &key, &value)) |
|
if (key == CSR_OFFSET) |
|
return CSR_REGISTER_BASE + value * 4; |
|
return 0; |
|
} |
|
|
|
static int isight_probe(struct fw_unit *unit, |
|
const struct ieee1394_device_id *id) |
|
{ |
|
struct fw_device *fw_dev = fw_parent_device(unit); |
|
struct snd_card *card; |
|
struct isight *isight; |
|
int err; |
|
|
|
err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, |
|
sizeof(*isight), &card); |
|
if (err < 0) |
|
return err; |
|
|
|
isight = card->private_data; |
|
isight->card = card; |
|
mutex_init(&isight->mutex); |
|
isight->unit = fw_unit_get(unit); |
|
isight->device = fw_dev; |
|
isight->audio_base = get_unit_base(unit); |
|
if (!isight->audio_base) { |
|
dev_err(&unit->device, "audio unit base not found\n"); |
|
err = -ENXIO; |
|
goto error; |
|
} |
|
fw_iso_resources_init(&isight->resources, unit); |
|
|
|
card->private_free = isight_card_free; |
|
|
|
strcpy(card->driver, "iSight"); |
|
strcpy(card->shortname, "Apple iSight"); |
|
snprintf(card->longname, sizeof(card->longname), |
|
"Apple iSight (GUID %08x%08x) at %s, S%d", |
|
fw_dev->config_rom[3], fw_dev->config_rom[4], |
|
dev_name(&unit->device), 100 << fw_dev->max_speed); |
|
strcpy(card->mixername, "iSight"); |
|
|
|
err = isight_create_pcm(isight); |
|
if (err < 0) |
|
goto error; |
|
|
|
err = isight_create_mixer(isight); |
|
if (err < 0) |
|
goto error; |
|
|
|
err = snd_card_register(card); |
|
if (err < 0) |
|
goto error; |
|
|
|
dev_set_drvdata(&unit->device, isight); |
|
|
|
return 0; |
|
error: |
|
snd_card_free(card); |
|
|
|
mutex_destroy(&isight->mutex); |
|
fw_unit_put(isight->unit); |
|
|
|
return err; |
|
} |
|
|
|
static void isight_bus_reset(struct fw_unit *unit) |
|
{ |
|
struct isight *isight = dev_get_drvdata(&unit->device); |
|
|
|
if (fw_iso_resources_update(&isight->resources) < 0) { |
|
isight_pcm_abort(isight); |
|
|
|
mutex_lock(&isight->mutex); |
|
isight_stop_streaming(isight); |
|
mutex_unlock(&isight->mutex); |
|
} |
|
} |
|
|
|
static void isight_remove(struct fw_unit *unit) |
|
{ |
|
struct isight *isight = dev_get_drvdata(&unit->device); |
|
|
|
isight_pcm_abort(isight); |
|
|
|
snd_card_disconnect(isight->card); |
|
|
|
mutex_lock(&isight->mutex); |
|
isight_stop_streaming(isight); |
|
mutex_unlock(&isight->mutex); |
|
|
|
// Block till all of ALSA character devices are released. |
|
snd_card_free(isight->card); |
|
|
|
mutex_destroy(&isight->mutex); |
|
fw_unit_put(isight->unit); |
|
} |
|
|
|
static const struct ieee1394_device_id isight_id_table[] = { |
|
{ |
|
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
|
IEEE1394_MATCH_VERSION, |
|
.specifier_id = OUI_APPLE, |
|
.version = SW_ISIGHT_AUDIO, |
|
}, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(ieee1394, isight_id_table); |
|
|
|
static struct fw_driver isight_driver = { |
|
.driver = { |
|
.owner = THIS_MODULE, |
|
.name = KBUILD_MODNAME, |
|
.bus = &fw_bus_type, |
|
}, |
|
.probe = isight_probe, |
|
.update = isight_bus_reset, |
|
.remove = isight_remove, |
|
.id_table = isight_id_table, |
|
}; |
|
|
|
static int __init alsa_isight_init(void) |
|
{ |
|
return driver_register(&isight_driver.driver); |
|
} |
|
|
|
static void __exit alsa_isight_exit(void) |
|
{ |
|
driver_unregister(&isight_driver.driver); |
|
} |
|
|
|
module_init(alsa_isight_init); |
|
module_exit(alsa_isight_exit);
|
|
|