diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/firewire/isight.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/firewire/isight.c | 753 |
1 files changed, 0 insertions, 753 deletions
diff --git a/ANDROID_3.4.5/sound/firewire/isight.c b/ANDROID_3.4.5/sound/firewire/isight.c deleted file mode 100644 index d428ffed..00000000 --- a/ANDROID_3.4.5/sound/firewire/isight.c +++ /dev/null @@ -1,753 +0,0 @@ -/* - * 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 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); |