| /* |
| * Apple iSight audio driver |
| * |
| * Copyright (c) Clemens Ladisch <clemens@ladisch.de> |
| * Licensed under the terms of the GNU General Public License, version 2. |
| */ |
| |
| #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 fw_address_handler iris_handler; |
| 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 <clemens@ladisch.de>"); |
| 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; |
| ACCESS_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 (!ACCESS_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) |
| { |
| unsigned long flags; |
| |
| if (ACCESS_ONCE(isight->pcm_active)) { |
| snd_pcm_stream_lock_irqsave(isight->pcm, flags); |
| if (snd_pcm_running(isight->pcm)) |
| snd_pcm_stop(isight->pcm, SNDRV_PCM_STATE_XRUN); |
| snd_pcm_stream_unlock_irqrestore(isight->pcm, flags); |
| } |
| } |
| |
| static void isight_dropped_samples(struct isight *isight, unsigned int total) |
| { |
| struct snd_pcm_runtime *runtime; |
| u32 dropped; |
| unsigned int count1; |
| |
| if (!ACCESS_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, rcode, errors = 0; |
| __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)); |
| for (;;) { |
| rcode = fw_run_transaction( |
| isight->device->card, |
| TCODE_WRITE_QUADLET_REQUEST, |
| isight->device->node_id, |
| isight->resources.generation, |
| isight->device->max_speed, |
| isight->audio_base + REG_ISO_TX_CONFIG, |
| &value, 4); |
| if (rcode == RCODE_COMPLETE) { |
| return 0; |
| } else if (rcode == RCODE_GENERATION) { |
| fw_iso_resources_free(&isight->resources); |
| goto retry_after_bus_reset; |
| } else if (rcode_is_permanent_error(rcode) || ++errors >= 3) { |
| err = -EIO; |
| goto err_resources; |
| } |
| msleep(5); |
| } |
| |
| 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; |
| int err; |
| |
| err = snd_pcm_lib_alloc_vmalloc_buffer(substream, |
| params_buffer_bytes(hw_params)); |
| if (err < 0) |
| return err; |
| |
| ACCESS_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); |
| } |
| |
| 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); |
| } |
| |
| static void isight_stop_streaming(struct isight *isight) |
| { |
| 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); |
| reg_write(isight, REG_AUDIO_ENABLE, 0); |
| } |
| |
| static int isight_hw_free(struct snd_pcm_substream *substream) |
| { |
| struct isight *isight = substream->private_data; |
| |
| ACCESS_ONCE(isight->pcm_active) = false; |
| |
| mutex_lock(&isight->mutex); |
| isight_stop_streaming(isight); |
| mutex_unlock(&isight->mutex); |
| |
| return snd_pcm_lib_free_vmalloc_buffer(substream); |
| } |
| |
| 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: |
| ACCESS_ONCE(isight->pcm_running) = true; |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| ACCESS_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 ACCESS_ONCE(isight->buffer_pointer); |
| } |
| |
| static int isight_create_pcm(struct isight *isight) |
| { |
| static struct snd_pcm_ops ops = { |
| .open = isight_open, |
| .close = isight_close, |
| .ioctl = snd_pcm_lib_ioctl, |
| .hw_params = isight_hw_params, |
| .hw_free = isight_hw_free, |
| .prepare = isight_prepare, |
| .trigger = isight_trigger, |
| .pointer = isight_pointer, |
| .page = snd_pcm_lib_get_vmalloc_page, |
| .mmap = snd_pcm_lib_mmap_vmalloc, |
| }; |
| 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; |
| |
| 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[0] = SNDRV_CTL_TLVT_DB_MINMAX; |
| isight->gain_tlv[1] = 2 * sizeof(unsigned int); |
| |
| err = reg_read(isight, REG_GAIN_DB_START, &value); |
| if (err < 0) |
| return err; |
| isight->gain_tlv[2] = (s32)be32_to_cpu(value) * 100; |
| |
| err = reg_read(isight, REG_GAIN_DB_END, &value); |
| if (err < 0) |
| return err; |
| isight->gain_tlv[3] = (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); |
| fw_unit_put(isight->unit); |
| mutex_destroy(&isight->mutex); |
| } |
| |
| 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 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 isight *isight; |
| int err; |
| |
| err = snd_card_create(-1, NULL, THIS_MODULE, sizeof(*isight), &card); |
| if (err < 0) |
| return err; |
| snd_card_set_dev(card, unit_dev); |
| |
| 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 err_unit; |
| } |
| 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_dev, isight); |
| |
| return 0; |
| |
| err_unit: |
| fw_unit_put(isight->unit); |
| mutex_destroy(&isight->mutex); |
| error: |
| snd_card_free(card); |
| return err; |
| } |
| |
| static int isight_remove(struct device *dev) |
| { |
| struct isight *isight = dev_get_drvdata(dev); |
| |
| isight_pcm_abort(isight); |
| |
| snd_card_disconnect(isight->card); |
| |
| mutex_lock(&isight->mutex); |
| isight_stop_streaming(isight); |
| mutex_unlock(&isight->mutex); |
| |
| snd_card_free_when_closed(isight->card); |
| |
| return 0; |
| } |
| |
| 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 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, |
| .remove = isight_remove, |
| }, |
| .update = isight_bus_reset, |
| .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); |