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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-31 18:09:19 +00:00
ALSA: add Apple iSight microphone driver
This adds an experimental driver for the front and rear microphones of the Apple iSight web camera. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Clemens Ladisch
Takashi Iwai
parent
d7ba858a7f
commit
3a691b28a0
5 changed files with 765 additions and 0 deletions
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@ -22,4 +22,16 @@ config SND_FIREWIRE_SPEAKERS
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To compile this driver as a module, choose M here: the module
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To compile this driver as a module, choose M here: the module
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will be called snd-firewire-speakers.
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will be called snd-firewire-speakers.
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config SND_ISIGHT
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tristate "Apple iSight microphone (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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select SND_PCM
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select SND_FIREWIRE_LIB
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help
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Say Y here to include support for the front and rear microphones
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of the Apple iSight web camera.
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To compile this driver as a module, choose M here: the module
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will be called snd-isight.
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endif # SND_FIREWIRE
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endif # SND_FIREWIRE
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@ -1,6 +1,8 @@
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snd-firewire-lib-objs := lib.o iso-resources.o packets-buffer.o \
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snd-firewire-lib-objs := lib.o iso-resources.o packets-buffer.o \
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fcp.o cmp.o amdtp.o
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fcp.o cmp.o amdtp.o
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snd-firewire-speakers-objs := speakers.o
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snd-firewire-speakers-objs := speakers.o
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snd-isight-objs := isight.o
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obj-$(CONFIG_SND_FIREWIRE_LIB) += snd-firewire-lib.o
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obj-$(CONFIG_SND_FIREWIRE_LIB) += snd-firewire-lib.o
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obj-$(CONFIG_SND_FIREWIRE_SPEAKERS) += snd-firewire-speakers.o
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obj-$(CONFIG_SND_FIREWIRE_SPEAKERS) += snd-firewire-speakers.o
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obj-$(CONFIG_SND_ISIGHT) += snd-isight.o
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744
sound/firewire/isight.c
Normal file
744
sound/firewire/isight.c
Normal file
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@ -0,0 +1,744 @@
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/*
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* Apple iSight audio driver
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*
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* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/firewire.h>
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#include <linux/firewire-constants.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/mutex.h>
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#include <linux/string.h>
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#include <sound/control.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/pcm.h>
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#include <sound/tlv.h>
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#include "lib.h"
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#include "iso-resources.h"
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#include "packets-buffer.h"
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#define OUI_APPLE 0x000a27
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#define MODEL_APPLE_ISIGHT 0x000008
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#define SW_ISIGHT_AUDIO 0x000010
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#define REG_AUDIO_ENABLE 0x000
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#define AUDIO_ENABLE 0x80000000
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#define REG_DEF_AUDIO_GAIN 0x204
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#define REG_GAIN_RAW_START 0x210
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#define REG_GAIN_RAW_END 0x214
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#define REG_GAIN_DB_START 0x218
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#define REG_GAIN_DB_END 0x21c
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#define REG_SAMPLE_RATE_INQUIRY 0x280
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#define REG_ISO_TX_CONFIG 0x300
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#define SPEED_SHIFT 16
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#define REG_SAMPLE_RATE 0x400
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#define RATE_48000 0x80000000
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#define REG_GAIN 0x500
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#define REG_MUTE 0x504
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#define MAX_FRAMES_PER_PACKET 475
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#define QUEUE_LENGTH 20
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struct isight {
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struct snd_card *card;
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struct fw_unit *unit;
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struct fw_device *device;
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u64 audio_base;
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struct fw_address_handler iris_handler;
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struct snd_pcm_substream *pcm;
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struct mutex mutex;
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struct iso_packets_buffer buffer;
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struct fw_iso_resources resources;
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struct fw_iso_context *context;
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bool pcm_running;
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bool first_packet;
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int packet_index;
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u32 total_samples;
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unsigned int buffer_pointer;
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unsigned int period_counter;
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s32 gain_min, gain_max;
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unsigned int gain_tlv[4];
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};
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struct audio_payload {
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__be32 sample_count;
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__be32 signature;
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__be32 sample_total;
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__be32 reserved;
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__be16 samples[2 * MAX_FRAMES_PER_PACKET];
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};
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MODULE_DESCRIPTION("iSight audio driver");
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MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
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MODULE_LICENSE("GPL v2");
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static struct fw_iso_packet audio_packet = {
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.payload_length = sizeof(struct audio_payload),
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.interrupt = 1,
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};
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static void isight_update_pointers(struct isight *isight, unsigned int count)
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{
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struct snd_pcm_runtime *runtime = isight->pcm->runtime;
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unsigned int ptr;
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smp_wmb(); /* update buffer data before buffer pointer */
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ptr = isight->buffer_pointer;
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ptr += count;
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if (ptr >= runtime->buffer_size)
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ptr -= runtime->buffer_size;
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ACCESS_ONCE(isight->buffer_pointer) = ptr;
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isight->period_counter += count;
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if (isight->period_counter >= runtime->period_size) {
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isight->period_counter -= runtime->period_size;
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snd_pcm_period_elapsed(isight->pcm);
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}
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}
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static void isight_samples(struct isight *isight,
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const __be16 *samples, unsigned int count)
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{
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struct snd_pcm_runtime *runtime;
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unsigned int count1;
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if (!ACCESS_ONCE(isight->pcm_running))
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return;
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runtime = isight->pcm->runtime;
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if (isight->buffer_pointer + count <= runtime->buffer_size) {
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memcpy(runtime->dma_area + isight->buffer_pointer * 4,
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samples, count * 4);
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} else {
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count1 = runtime->buffer_size - isight->buffer_pointer;
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memcpy(runtime->dma_area + isight->buffer_pointer * 4,
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samples, count1 * 4);
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samples += count1 * 2;
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memcpy(runtime->dma_area, samples, (count - count1) * 4);
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}
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isight_update_pointers(isight, count);
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}
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static void isight_pcm_abort(struct isight *isight)
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{
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unsigned long flags;
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snd_pcm_stream_lock_irqsave(isight->pcm, flags);
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if (snd_pcm_running(isight->pcm))
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snd_pcm_stop(isight->pcm, SNDRV_PCM_STATE_XRUN);
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snd_pcm_stream_unlock_irqrestore(isight->pcm, flags);
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}
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static void isight_dropped_samples(struct isight *isight, unsigned int total)
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{
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struct snd_pcm_runtime *runtime;
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u32 dropped;
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unsigned int count1;
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if (!ACCESS_ONCE(isight->pcm_running))
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return;
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runtime = isight->pcm->runtime;
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dropped = total - isight->total_samples;
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if (dropped < runtime->buffer_size) {
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if (isight->buffer_pointer + dropped <= runtime->buffer_size) {
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memset(runtime->dma_area + isight->buffer_pointer * 4,
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0, dropped * 4);
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} else {
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count1 = runtime->buffer_size - isight->buffer_pointer;
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memset(runtime->dma_area + isight->buffer_pointer * 4,
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0, count1 * 4);
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memset(runtime->dma_area, 0, (dropped - count1) * 4);
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}
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isight_update_pointers(isight, dropped);
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} else {
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isight_pcm_abort(isight);
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}
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}
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static void isight_packet(struct fw_iso_context *context, u32 cycle,
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size_t header_length, void *header, void *data)
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{
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struct isight *isight = data;
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const struct audio_payload *payload;
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unsigned int index, length, count, total;
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int err;
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if (isight->packet_index < 0)
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return;
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index = isight->packet_index;
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payload = isight->buffer.packets[index].buffer;
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length = be32_to_cpup(header) >> 16;
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if (likely(length >= 16 &&
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payload->signature == cpu_to_be32(0x73676874/*"sght"*/))) {
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count = be32_to_cpu(payload->sample_count);
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if (likely(count <= (length - 16) / 4)) {
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total = be32_to_cpu(payload->sample_total);
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if (unlikely(total != isight->total_samples)) {
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if (!isight->first_packet)
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isight_dropped_samples(isight, total);
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isight->first_packet = false;
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isight->total_samples = total;
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}
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isight_samples(isight, payload->samples, count);
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isight->total_samples += count;
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}
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}
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if (++index >= QUEUE_LENGTH)
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index = 0;
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err = fw_iso_context_queue(isight->context, &audio_packet,
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&isight->buffer.iso_buffer,
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isight->buffer.packets[index].offset);
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if (err < 0) {
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dev_err(&isight->unit->device, "queueing error: %d\n", err);
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isight_pcm_abort(isight);
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isight->packet_index = -1;
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return;
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}
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isight->packet_index = index;
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}
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static int isight_connect(struct isight *isight)
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{
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int ch, err, rcode, errors = 0;
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__be32 value;
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retry_after_bus_reset:
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ch = fw_iso_resources_allocate(&isight->resources,
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sizeof(struct audio_payload),
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isight->device->max_speed);
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if (ch < 0) {
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err = ch;
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goto error;
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}
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value = cpu_to_be32(ch | (isight->device->max_speed << SPEED_SHIFT));
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for (;;) {
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rcode = fw_run_transaction(
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isight->device->card,
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TCODE_WRITE_QUADLET_REQUEST,
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isight->device->node_id,
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isight->resources.generation,
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isight->device->max_speed,
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isight->audio_base + REG_ISO_TX_CONFIG,
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&value, 4);
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if (rcode == RCODE_COMPLETE) {
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return 0;
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} else if (rcode == RCODE_GENERATION) {
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fw_iso_resources_free(&isight->resources);
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goto retry_after_bus_reset;
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} else if (rcode_is_permanent_error(rcode) || ++errors >= 3) {
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err = -EIO;
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goto err_resources;
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}
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msleep(5);
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}
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err_resources:
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fw_iso_resources_free(&isight->resources);
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error:
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return err;
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}
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static int isight_open(struct snd_pcm_substream *substream)
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{
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static const struct snd_pcm_hardware hardware = {
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.info = SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_BATCH |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER,
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.formats = SNDRV_PCM_FMTBIT_S16_BE,
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.rates = SNDRV_PCM_RATE_48000,
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.rate_min = 48000,
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.rate_max = 48000,
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.channels_min = 2,
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.channels_max = 2,
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.buffer_bytes_max = 4 * 1024 * 1024,
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.period_bytes_min = MAX_FRAMES_PER_PACKET * 4,
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.period_bytes_max = 1024 * 1024,
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.periods_min = 2,
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.periods_max = UINT_MAX,
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};
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struct isight *isight = substream->private_data;
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substream->runtime->hw = hardware;
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return iso_packets_buffer_init(&isight->buffer, isight->unit,
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QUEUE_LENGTH,
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sizeof(struct audio_payload),
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DMA_FROM_DEVICE);
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}
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static int isight_close(struct snd_pcm_substream *substream)
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{
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struct isight *isight = substream->private_data;
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iso_packets_buffer_destroy(&isight->buffer, isight->unit);
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return 0;
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}
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static int isight_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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return snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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}
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static void isight_stop_streaming(struct isight *isight)
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{
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__be32 value;
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if (!isight->context)
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return;
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fw_iso_context_stop(isight->context);
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fw_iso_context_destroy(isight->context);
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isight->context = NULL;
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value = 0;
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snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
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isight->audio_base + REG_AUDIO_ENABLE,
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&value, 4);
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fw_iso_resources_free(&isight->resources);
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}
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static int isight_hw_free(struct snd_pcm_substream *substream)
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|
{
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struct isight *isight = substream->private_data;
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mutex_lock(&isight->mutex);
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isight_stop_streaming(isight);
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mutex_unlock(&isight->mutex);
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return snd_pcm_lib_free_vmalloc_buffer(substream);
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}
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static int isight_start_streaming(struct isight *isight)
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{
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__be32 sample_rate;
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unsigned int i;
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int err;
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if (isight->context) {
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if (isight->packet_index < 0)
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isight_stop_streaming(isight);
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else
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return 0;
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}
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sample_rate = cpu_to_be32(RATE_48000);
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||||||
|
err = snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_SAMPLE_RATE,
|
||||||
|
&sample_rate, 4);
|
||||||
|
if (err < 0)
|
||||||
|
return err;
|
||||||
|
|
||||||
|
err = isight_connect(isight);
|
||||||
|
if (err < 0)
|
||||||
|
goto error;
|
||||||
|
|
||||||
|
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);
|
||||||
|
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 = snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_GAIN, &gain, 4);
|
||||||
|
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;
|
||||||
|
__be32 gain;
|
||||||
|
|
||||||
|
if (value->value.integer.value[0] < isight->gain_min ||
|
||||||
|
value->value.integer.value[0] > isight->gain_max)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
gain = cpu_to_be32(value->value.integer.value[0]);
|
||||||
|
return snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_GAIN, &gain, 4);
|
||||||
|
}
|
||||||
|
|
||||||
|
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 = snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_MUTE, &mute, 4);
|
||||||
|
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;
|
||||||
|
__be32 mute;
|
||||||
|
|
||||||
|
mute = (__force __be32)!value->value.integer.value[0];
|
||||||
|
return snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_MUTE, &mute, 4);
|
||||||
|
}
|
||||||
|
|
||||||
|
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 = snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_GAIN_RAW_START,
|
||||||
|
&value, 4);
|
||||||
|
if (err < 0)
|
||||||
|
return err;
|
||||||
|
isight->gain_min = be32_to_cpu(value);
|
||||||
|
|
||||||
|
err = snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_GAIN_RAW_END,
|
||||||
|
&value, 4);
|
||||||
|
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 = snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_GAIN_DB_START,
|
||||||
|
&value, 4);
|
||||||
|
if (err < 0)
|
||||||
|
return err;
|
||||||
|
isight->gain_tlv[2] = (s32)be32_to_cpu(value) * 100;
|
||||||
|
err = snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST,
|
||||||
|
isight->audio_base + REG_GAIN_DB_END,
|
||||||
|
&value, 4);
|
||||||
|
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);
|
||||||
|
fw_device_put(isight->device);
|
||||||
|
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_device_get(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);
|
||||||
|
fw_device_put(isight->device);
|
||||||
|
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);
|
||||||
|
|
||||||
|
snd_card_disconnect(isight->card);
|
||||||
|
|
||||||
|
mutex_lock(&isight->mutex);
|
||||||
|
isight_pcm_abort(isight);
|
||||||
|
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);
|
||||||
|
|
||||||
|
mutex_lock(&isight->mutex);
|
||||||
|
if (fw_iso_resources_update(&isight->resources) < 0) {
|
||||||
|
isight_pcm_abort(isight);
|
||||||
|
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);
|
||||||
|
|
@ -36,6 +36,7 @@ int fw_iso_resources_init(struct fw_iso_resources *r, struct fw_unit *unit)
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(fw_iso_resources_init);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* fw_iso_resources_destroy - destroy a resource manager
|
* fw_iso_resources_destroy - destroy a resource manager
|
||||||
|
|
@ -48,6 +49,7 @@ void fw_iso_resources_destroy(struct fw_iso_resources *r)
|
||||||
mutex_destroy(&r->mutex);
|
mutex_destroy(&r->mutex);
|
||||||
fw_unit_put(r->unit);
|
fw_unit_put(r->unit);
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(fw_iso_resources_destroy);
|
||||||
|
|
||||||
static unsigned int packet_bandwidth(unsigned int max_payload_bytes, int speed)
|
static unsigned int packet_bandwidth(unsigned int max_payload_bytes, int speed)
|
||||||
{
|
{
|
||||||
|
|
@ -152,6 +154,7 @@ retry_after_bus_reset:
|
||||||
|
|
||||||
return channel;
|
return channel;
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(fw_iso_resources_allocate);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* fw_iso_resources_update - update resource allocations after a bus reset
|
* fw_iso_resources_update - update resource allocations after a bus reset
|
||||||
|
|
@ -203,6 +206,7 @@ int fw_iso_resources_update(struct fw_iso_resources *r)
|
||||||
|
|
||||||
return channel;
|
return channel;
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(fw_iso_resources_update);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* fw_iso_resources_free - frees allocated resources
|
* fw_iso_resources_free - frees allocated resources
|
||||||
|
|
@ -230,3 +234,4 @@ void fw_iso_resources_free(struct fw_iso_resources *r)
|
||||||
|
|
||||||
mutex_unlock(&r->mutex);
|
mutex_unlock(&r->mutex);
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(fw_iso_resources_free);
|
||||||
|
|
|
||||||
|
|
@ -60,6 +60,7 @@ err_packets:
|
||||||
error:
|
error:
|
||||||
return err;
|
return err;
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(iso_packets_buffer_init);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* iso_packets_buffer_destroy - frees packet buffer resources
|
* iso_packets_buffer_destroy - frees packet buffer resources
|
||||||
|
|
@ -72,3 +73,4 @@ void iso_packets_buffer_destroy(struct iso_packets_buffer *b,
|
||||||
fw_iso_buffer_destroy(&b->iso_buffer, fw_parent_device(unit)->card);
|
fw_iso_buffer_destroy(&b->iso_buffer, fw_parent_device(unit)->card);
|
||||||
kfree(b->packets);
|
kfree(b->packets);
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(iso_packets_buffer_destroy);
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue