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Clemens Ladisch3a691b22011-05-11 10:44:51 +02001/*
2 * Apple iSight audio driver
3 *
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 * Licensed under the terms of the GNU General Public License, version 2.
6 */
7
Stefan Richterac34dad2011-05-11 10:52:21 +02008#include <asm/byteorder.h>
Clemens Ladisch3a691b22011-05-11 10:44:51 +02009#include <linux/delay.h>
10#include <linux/device.h>
11#include <linux/firewire.h>
12#include <linux/firewire-constants.h>
13#include <linux/module.h>
14#include <linux/mod_devicetable.h>
15#include <linux/mutex.h>
16#include <linux/string.h>
17#include <sound/control.h>
18#include <sound/core.h>
19#include <sound/initval.h>
20#include <sound/pcm.h>
21#include <sound/tlv.h>
22#include "lib.h"
23#include "iso-resources.h"
24#include "packets-buffer.h"
25
26#define OUI_APPLE 0x000a27
27#define MODEL_APPLE_ISIGHT 0x000008
28#define SW_ISIGHT_AUDIO 0x000010
29
30#define REG_AUDIO_ENABLE 0x000
31#define AUDIO_ENABLE 0x80000000
32#define REG_DEF_AUDIO_GAIN 0x204
33#define REG_GAIN_RAW_START 0x210
34#define REG_GAIN_RAW_END 0x214
35#define REG_GAIN_DB_START 0x218
36#define REG_GAIN_DB_END 0x21c
37#define REG_SAMPLE_RATE_INQUIRY 0x280
38#define REG_ISO_TX_CONFIG 0x300
39#define SPEED_SHIFT 16
40#define REG_SAMPLE_RATE 0x400
41#define RATE_48000 0x80000000
42#define REG_GAIN 0x500
43#define REG_MUTE 0x504
44
45#define MAX_FRAMES_PER_PACKET 475
46
47#define QUEUE_LENGTH 20
48
49struct isight {
50 struct snd_card *card;
51 struct fw_unit *unit;
52 struct fw_device *device;
53 u64 audio_base;
Clemens Ladisch3a691b22011-05-11 10:44:51 +020054 struct snd_pcm_substream *pcm;
55 struct mutex mutex;
56 struct iso_packets_buffer buffer;
57 struct fw_iso_resources resources;
58 struct fw_iso_context *context;
Clemens Ladisch03c29682011-05-11 10:47:30 +020059 bool pcm_active;
Clemens Ladisch3a691b22011-05-11 10:44:51 +020060 bool pcm_running;
61 bool first_packet;
62 int packet_index;
63 u32 total_samples;
64 unsigned int buffer_pointer;
65 unsigned int period_counter;
66 s32 gain_min, gain_max;
67 unsigned int gain_tlv[4];
68};
69
70struct audio_payload {
71 __be32 sample_count;
72 __be32 signature;
73 __be32 sample_total;
74 __be32 reserved;
75 __be16 samples[2 * MAX_FRAMES_PER_PACKET];
76};
77
78MODULE_DESCRIPTION("iSight audio driver");
79MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
80MODULE_LICENSE("GPL v2");
81
82static struct fw_iso_packet audio_packet = {
83 .payload_length = sizeof(struct audio_payload),
84 .interrupt = 1,
Clemens Ladischf2934cd2011-05-11 10:49:02 +020085 .header_length = 4,
Clemens Ladisch3a691b22011-05-11 10:44:51 +020086};
87
88static void isight_update_pointers(struct isight *isight, unsigned int count)
89{
90 struct snd_pcm_runtime *runtime = isight->pcm->runtime;
91 unsigned int ptr;
92
93 smp_wmb(); /* update buffer data before buffer pointer */
94
95 ptr = isight->buffer_pointer;
96 ptr += count;
97 if (ptr >= runtime->buffer_size)
98 ptr -= runtime->buffer_size;
99 ACCESS_ONCE(isight->buffer_pointer) = ptr;
100
101 isight->period_counter += count;
102 if (isight->period_counter >= runtime->period_size) {
103 isight->period_counter -= runtime->period_size;
104 snd_pcm_period_elapsed(isight->pcm);
105 }
106}
107
108static void isight_samples(struct isight *isight,
109 const __be16 *samples, unsigned int count)
110{
111 struct snd_pcm_runtime *runtime;
112 unsigned int count1;
113
114 if (!ACCESS_ONCE(isight->pcm_running))
115 return;
116
117 runtime = isight->pcm->runtime;
118 if (isight->buffer_pointer + count <= runtime->buffer_size) {
119 memcpy(runtime->dma_area + isight->buffer_pointer * 4,
120 samples, count * 4);
121 } else {
122 count1 = runtime->buffer_size - isight->buffer_pointer;
123 memcpy(runtime->dma_area + isight->buffer_pointer * 4,
124 samples, count1 * 4);
125 samples += count1 * 2;
126 memcpy(runtime->dma_area, samples, (count - count1) * 4);
127 }
128
129 isight_update_pointers(isight, count);
130}
131
132static void isight_pcm_abort(struct isight *isight)
133{
134 unsigned long flags;
135
Clemens Ladisch03c29682011-05-11 10:47:30 +0200136 if (ACCESS_ONCE(isight->pcm_active)) {
137 snd_pcm_stream_lock_irqsave(isight->pcm, flags);
138 if (snd_pcm_running(isight->pcm))
139 snd_pcm_stop(isight->pcm, SNDRV_PCM_STATE_XRUN);
140 snd_pcm_stream_unlock_irqrestore(isight->pcm, flags);
141 }
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200142}
143
144static void isight_dropped_samples(struct isight *isight, unsigned int total)
145{
146 struct snd_pcm_runtime *runtime;
147 u32 dropped;
148 unsigned int count1;
149
150 if (!ACCESS_ONCE(isight->pcm_running))
151 return;
152
153 runtime = isight->pcm->runtime;
154 dropped = total - isight->total_samples;
155 if (dropped < runtime->buffer_size) {
156 if (isight->buffer_pointer + dropped <= runtime->buffer_size) {
157 memset(runtime->dma_area + isight->buffer_pointer * 4,
158 0, dropped * 4);
159 } else {
160 count1 = runtime->buffer_size - isight->buffer_pointer;
161 memset(runtime->dma_area + isight->buffer_pointer * 4,
162 0, count1 * 4);
163 memset(runtime->dma_area, 0, (dropped - count1) * 4);
164 }
165 isight_update_pointers(isight, dropped);
166 } else {
167 isight_pcm_abort(isight);
168 }
169}
170
171static void isight_packet(struct fw_iso_context *context, u32 cycle,
172 size_t header_length, void *header, void *data)
173{
174 struct isight *isight = data;
175 const struct audio_payload *payload;
176 unsigned int index, length, count, total;
177 int err;
178
179 if (isight->packet_index < 0)
180 return;
181 index = isight->packet_index;
182 payload = isight->buffer.packets[index].buffer;
183 length = be32_to_cpup(header) >> 16;
184
185 if (likely(length >= 16 &&
186 payload->signature == cpu_to_be32(0x73676874/*"sght"*/))) {
187 count = be32_to_cpu(payload->sample_count);
188 if (likely(count <= (length - 16) / 4)) {
189 total = be32_to_cpu(payload->sample_total);
190 if (unlikely(total != isight->total_samples)) {
191 if (!isight->first_packet)
192 isight_dropped_samples(isight, total);
193 isight->first_packet = false;
194 isight->total_samples = total;
195 }
196
197 isight_samples(isight, payload->samples, count);
198 isight->total_samples += count;
199 }
200 }
201
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200202 err = fw_iso_context_queue(isight->context, &audio_packet,
203 &isight->buffer.iso_buffer,
204 isight->buffer.packets[index].offset);
205 if (err < 0) {
206 dev_err(&isight->unit->device, "queueing error: %d\n", err);
207 isight_pcm_abort(isight);
208 isight->packet_index = -1;
209 return;
210 }
Clemens Ladischcf6f1ff2011-06-17 08:18:35 +0200211 fw_iso_context_queue_flush(isight->context);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200212
Clemens Ladisch898732d2011-05-11 10:48:24 +0200213 if (++index >= QUEUE_LENGTH)
214 index = 0;
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200215 isight->packet_index = index;
216}
217
218static int isight_connect(struct isight *isight)
219{
220 int ch, err, rcode, errors = 0;
221 __be32 value;
222
223retry_after_bus_reset:
224 ch = fw_iso_resources_allocate(&isight->resources,
225 sizeof(struct audio_payload),
226 isight->device->max_speed);
227 if (ch < 0) {
228 err = ch;
229 goto error;
230 }
231
232 value = cpu_to_be32(ch | (isight->device->max_speed << SPEED_SHIFT));
233 for (;;) {
234 rcode = fw_run_transaction(
235 isight->device->card,
236 TCODE_WRITE_QUADLET_REQUEST,
237 isight->device->node_id,
238 isight->resources.generation,
239 isight->device->max_speed,
240 isight->audio_base + REG_ISO_TX_CONFIG,
241 &value, 4);
242 if (rcode == RCODE_COMPLETE) {
243 return 0;
244 } else if (rcode == RCODE_GENERATION) {
245 fw_iso_resources_free(&isight->resources);
246 goto retry_after_bus_reset;
247 } else if (rcode_is_permanent_error(rcode) || ++errors >= 3) {
248 err = -EIO;
249 goto err_resources;
250 }
251 msleep(5);
252 }
253
254err_resources:
255 fw_iso_resources_free(&isight->resources);
256error:
257 return err;
258}
259
260static int isight_open(struct snd_pcm_substream *substream)
261{
262 static const struct snd_pcm_hardware hardware = {
263 .info = SNDRV_PCM_INFO_MMAP |
264 SNDRV_PCM_INFO_MMAP_VALID |
265 SNDRV_PCM_INFO_BATCH |
266 SNDRV_PCM_INFO_INTERLEAVED |
267 SNDRV_PCM_INFO_BLOCK_TRANSFER,
268 .formats = SNDRV_PCM_FMTBIT_S16_BE,
269 .rates = SNDRV_PCM_RATE_48000,
270 .rate_min = 48000,
271 .rate_max = 48000,
272 .channels_min = 2,
273 .channels_max = 2,
274 .buffer_bytes_max = 4 * 1024 * 1024,
275 .period_bytes_min = MAX_FRAMES_PER_PACKET * 4,
276 .period_bytes_max = 1024 * 1024,
277 .periods_min = 2,
278 .periods_max = UINT_MAX,
279 };
280 struct isight *isight = substream->private_data;
281
282 substream->runtime->hw = hardware;
283
284 return iso_packets_buffer_init(&isight->buffer, isight->unit,
285 QUEUE_LENGTH,
286 sizeof(struct audio_payload),
287 DMA_FROM_DEVICE);
288}
289
290static int isight_close(struct snd_pcm_substream *substream)
291{
292 struct isight *isight = substream->private_data;
293
294 iso_packets_buffer_destroy(&isight->buffer, isight->unit);
295
296 return 0;
297}
298
299static int isight_hw_params(struct snd_pcm_substream *substream,
300 struct snd_pcm_hw_params *hw_params)
301{
Clemens Ladisch03c29682011-05-11 10:47:30 +0200302 struct isight *isight = substream->private_data;
303 int err;
304
305 err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
306 params_buffer_bytes(hw_params));
307 if (err < 0)
308 return err;
309
310 ACCESS_ONCE(isight->pcm_active) = true;
311
312 return 0;
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200313}
314
Stefan Richterac34dad2011-05-11 10:52:21 +0200315static int reg_read(struct isight *isight, int offset, __be32 *value)
316{
317 return snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST,
318 isight->audio_base + offset, value, 4);
319}
320
321static int reg_write(struct isight *isight, int offset, __be32 value)
322{
323 return snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
324 isight->audio_base + offset, &value, 4);
325}
326
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200327static void isight_stop_streaming(struct isight *isight)
328{
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200329 if (!isight->context)
330 return;
331
332 fw_iso_context_stop(isight->context);
333 fw_iso_context_destroy(isight->context);
334 isight->context = NULL;
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200335 fw_iso_resources_free(&isight->resources);
Stefan Richterac34dad2011-05-11 10:52:21 +0200336 reg_write(isight, REG_AUDIO_ENABLE, 0);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200337}
338
339static int isight_hw_free(struct snd_pcm_substream *substream)
340{
341 struct isight *isight = substream->private_data;
342
Clemens Ladisch03c29682011-05-11 10:47:30 +0200343 ACCESS_ONCE(isight->pcm_active) = false;
344
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200345 mutex_lock(&isight->mutex);
346 isight_stop_streaming(isight);
347 mutex_unlock(&isight->mutex);
348
349 return snd_pcm_lib_free_vmalloc_buffer(substream);
350}
351
352static int isight_start_streaming(struct isight *isight)
353{
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200354 unsigned int i;
355 int err;
356
357 if (isight->context) {
358 if (isight->packet_index < 0)
359 isight_stop_streaming(isight);
360 else
361 return 0;
362 }
363
Stefan Richterac34dad2011-05-11 10:52:21 +0200364 err = reg_write(isight, REG_SAMPLE_RATE, cpu_to_be32(RATE_48000));
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200365 if (err < 0)
Stefan Richterac34dad2011-05-11 10:52:21 +0200366 goto error;
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200367
368 err = isight_connect(isight);
369 if (err < 0)
370 goto error;
371
Stefan Richterac34dad2011-05-11 10:52:21 +0200372 err = reg_write(isight, REG_AUDIO_ENABLE, cpu_to_be32(AUDIO_ENABLE));
Stefan Richter8839eed2011-05-11 10:49:58 +0200373 if (err < 0)
374 goto err_resources;
375
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200376 isight->context = fw_iso_context_create(isight->device->card,
377 FW_ISO_CONTEXT_RECEIVE,
378 isight->resources.channel,
379 isight->device->max_speed,
380 4, isight_packet, isight);
381 if (IS_ERR(isight->context)) {
382 err = PTR_ERR(isight->context);
383 isight->context = NULL;
384 goto err_resources;
385 }
386
387 for (i = 0; i < QUEUE_LENGTH; ++i) {
388 err = fw_iso_context_queue(isight->context, &audio_packet,
389 &isight->buffer.iso_buffer,
390 isight->buffer.packets[i].offset);
391 if (err < 0)
392 goto err_context;
393 }
394
395 isight->first_packet = true;
396 isight->packet_index = 0;
397
398 err = fw_iso_context_start(isight->context, -1, 0,
399 FW_ISO_CONTEXT_MATCH_ALL_TAGS/*?*/);
400 if (err < 0)
401 goto err_context;
402
403 return 0;
404
405err_context:
406 fw_iso_context_destroy(isight->context);
407 isight->context = NULL;
408err_resources:
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200409 fw_iso_resources_free(&isight->resources);
Stefan Richterac34dad2011-05-11 10:52:21 +0200410 reg_write(isight, REG_AUDIO_ENABLE, 0);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200411error:
412 return err;
413}
414
415static int isight_prepare(struct snd_pcm_substream *substream)
416{
417 struct isight *isight = substream->private_data;
418 int err;
419
420 isight->buffer_pointer = 0;
421 isight->period_counter = 0;
422
423 mutex_lock(&isight->mutex);
424 err = isight_start_streaming(isight);
425 mutex_unlock(&isight->mutex);
426
427 return err;
428}
429
430static int isight_trigger(struct snd_pcm_substream *substream, int cmd)
431{
432 struct isight *isight = substream->private_data;
433
434 switch (cmd) {
435 case SNDRV_PCM_TRIGGER_START:
436 ACCESS_ONCE(isight->pcm_running) = true;
437 break;
438 case SNDRV_PCM_TRIGGER_STOP:
439 ACCESS_ONCE(isight->pcm_running) = false;
440 break;
441 default:
442 return -EINVAL;
443 }
444 return 0;
445}
446
447static snd_pcm_uframes_t isight_pointer(struct snd_pcm_substream *substream)
448{
449 struct isight *isight = substream->private_data;
450
451 return ACCESS_ONCE(isight->buffer_pointer);
452}
453
454static int isight_create_pcm(struct isight *isight)
455{
456 static struct snd_pcm_ops ops = {
457 .open = isight_open,
458 .close = isight_close,
459 .ioctl = snd_pcm_lib_ioctl,
460 .hw_params = isight_hw_params,
461 .hw_free = isight_hw_free,
462 .prepare = isight_prepare,
463 .trigger = isight_trigger,
464 .pointer = isight_pointer,
465 .page = snd_pcm_lib_get_vmalloc_page,
466 .mmap = snd_pcm_lib_mmap_vmalloc,
467 };
468 struct snd_pcm *pcm;
469 int err;
470
471 err = snd_pcm_new(isight->card, "iSight", 0, 0, 1, &pcm);
472 if (err < 0)
473 return err;
474 pcm->private_data = isight;
475 strcpy(pcm->name, "iSight");
476 isight->pcm = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
477 isight->pcm->ops = &ops;
478
479 return 0;
480}
481
482static int isight_gain_info(struct snd_kcontrol *ctl,
483 struct snd_ctl_elem_info *info)
484{
485 struct isight *isight = ctl->private_data;
486
487 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
488 info->count = 1;
489 info->value.integer.min = isight->gain_min;
490 info->value.integer.max = isight->gain_max;
491
492 return 0;
493}
494
495static int isight_gain_get(struct snd_kcontrol *ctl,
496 struct snd_ctl_elem_value *value)
497{
498 struct isight *isight = ctl->private_data;
499 __be32 gain;
500 int err;
501
Stefan Richterac34dad2011-05-11 10:52:21 +0200502 err = reg_read(isight, REG_GAIN, &gain);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200503 if (err < 0)
504 return err;
505
506 value->value.integer.value[0] = (s32)be32_to_cpu(gain);
507
508 return 0;
509}
510
511static int isight_gain_put(struct snd_kcontrol *ctl,
512 struct snd_ctl_elem_value *value)
513{
514 struct isight *isight = ctl->private_data;
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200515
516 if (value->value.integer.value[0] < isight->gain_min ||
517 value->value.integer.value[0] > isight->gain_max)
518 return -EINVAL;
519
Stefan Richterac34dad2011-05-11 10:52:21 +0200520 return reg_write(isight, REG_GAIN,
521 cpu_to_be32(value->value.integer.value[0]));
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200522}
523
524static int isight_mute_get(struct snd_kcontrol *ctl,
525 struct snd_ctl_elem_value *value)
526{
527 struct isight *isight = ctl->private_data;
528 __be32 mute;
529 int err;
530
Stefan Richterac34dad2011-05-11 10:52:21 +0200531 err = reg_read(isight, REG_MUTE, &mute);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200532 if (err < 0)
533 return err;
534
535 value->value.integer.value[0] = !mute;
536
537 return 0;
538}
539
540static int isight_mute_put(struct snd_kcontrol *ctl,
541 struct snd_ctl_elem_value *value)
542{
543 struct isight *isight = ctl->private_data;
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200544
Stefan Richterac34dad2011-05-11 10:52:21 +0200545 return reg_write(isight, REG_MUTE,
546 (__force __be32)!value->value.integer.value[0]);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200547}
548
549static int isight_create_mixer(struct isight *isight)
550{
551 static const struct snd_kcontrol_new gain_control = {
552 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
553 .name = "Mic Capture Volume",
554 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
555 SNDRV_CTL_ELEM_ACCESS_TLV_READ,
556 .info = isight_gain_info,
557 .get = isight_gain_get,
558 .put = isight_gain_put,
559 };
560 static const struct snd_kcontrol_new mute_control = {
561 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
562 .name = "Mic Capture Switch",
563 .info = snd_ctl_boolean_mono_info,
564 .get = isight_mute_get,
565 .put = isight_mute_put,
566 };
567 __be32 value;
568 struct snd_kcontrol *ctl;
569 int err;
570
Stefan Richterac34dad2011-05-11 10:52:21 +0200571 err = reg_read(isight, REG_GAIN_RAW_START, &value);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200572 if (err < 0)
573 return err;
574 isight->gain_min = be32_to_cpu(value);
575
Stefan Richterac34dad2011-05-11 10:52:21 +0200576 err = reg_read(isight, REG_GAIN_RAW_END, &value);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200577 if (err < 0)
578 return err;
579 isight->gain_max = be32_to_cpu(value);
580
581 isight->gain_tlv[0] = SNDRV_CTL_TLVT_DB_MINMAX;
582 isight->gain_tlv[1] = 2 * sizeof(unsigned int);
Stefan Richterac34dad2011-05-11 10:52:21 +0200583
584 err = reg_read(isight, REG_GAIN_DB_START, &value);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200585 if (err < 0)
586 return err;
587 isight->gain_tlv[2] = (s32)be32_to_cpu(value) * 100;
Stefan Richterac34dad2011-05-11 10:52:21 +0200588
589 err = reg_read(isight, REG_GAIN_DB_END, &value);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200590 if (err < 0)
591 return err;
592 isight->gain_tlv[3] = (s32)be32_to_cpu(value) * 100;
593
594 ctl = snd_ctl_new1(&gain_control, isight);
595 if (ctl)
596 ctl->tlv.p = isight->gain_tlv;
597 err = snd_ctl_add(isight->card, ctl);
598 if (err < 0)
599 return err;
600
601 err = snd_ctl_add(isight->card, snd_ctl_new1(&mute_control, isight));
602 if (err < 0)
603 return err;
604
605 return 0;
606}
607
608static void isight_card_free(struct snd_card *card)
609{
610 struct isight *isight = card->private_data;
611
612 fw_iso_resources_destroy(&isight->resources);
613 fw_unit_put(isight->unit);
614 fw_device_put(isight->device);
615 mutex_destroy(&isight->mutex);
616}
617
618static u64 get_unit_base(struct fw_unit *unit)
619{
620 struct fw_csr_iterator i;
621 int key, value;
622
623 fw_csr_iterator_init(&i, unit->directory);
624 while (fw_csr_iterator_next(&i, &key, &value))
625 if (key == CSR_OFFSET)
626 return CSR_REGISTER_BASE + value * 4;
627 return 0;
628}
629
630static int isight_probe(struct device *unit_dev)
631{
632 struct fw_unit *unit = fw_unit(unit_dev);
633 struct fw_device *fw_dev = fw_parent_device(unit);
634 struct snd_card *card;
635 struct isight *isight;
636 int err;
637
638 err = snd_card_create(-1, NULL, THIS_MODULE, sizeof(*isight), &card);
639 if (err < 0)
640 return err;
641 snd_card_set_dev(card, unit_dev);
642
643 isight = card->private_data;
644 isight->card = card;
645 mutex_init(&isight->mutex);
646 isight->unit = fw_unit_get(unit);
647 isight->device = fw_device_get(fw_dev);
648 isight->audio_base = get_unit_base(unit);
649 if (!isight->audio_base) {
650 dev_err(&unit->device, "audio unit base not found\n");
651 err = -ENXIO;
652 goto err_unit;
653 }
654 fw_iso_resources_init(&isight->resources, unit);
655
656 card->private_free = isight_card_free;
657
658 strcpy(card->driver, "iSight");
659 strcpy(card->shortname, "Apple iSight");
660 snprintf(card->longname, sizeof(card->longname),
661 "Apple iSight (GUID %08x%08x) at %s, S%d",
662 fw_dev->config_rom[3], fw_dev->config_rom[4],
663 dev_name(&unit->device), 100 << fw_dev->max_speed);
664 strcpy(card->mixername, "iSight");
665
666 err = isight_create_pcm(isight);
667 if (err < 0)
668 goto error;
669
670 err = isight_create_mixer(isight);
671 if (err < 0)
672 goto error;
673
674 err = snd_card_register(card);
675 if (err < 0)
676 goto error;
677
678 dev_set_drvdata(unit_dev, isight);
679
680 return 0;
681
682err_unit:
683 fw_unit_put(isight->unit);
684 fw_device_put(isight->device);
685 mutex_destroy(&isight->mutex);
686error:
687 snd_card_free(card);
688 return err;
689}
690
691static int isight_remove(struct device *dev)
692{
693 struct isight *isight = dev_get_drvdata(dev);
694
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200695 isight_pcm_abort(isight);
Clemens Ladischf3f7c182011-05-11 11:07:09 +0200696
Clemens Ladischaee70402011-05-11 10:53:12 +0200697 snd_card_disconnect(isight->card);
Clemens Ladischf3f7c182011-05-11 11:07:09 +0200698
699 mutex_lock(&isight->mutex);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200700 isight_stop_streaming(isight);
701 mutex_unlock(&isight->mutex);
702
703 snd_card_free_when_closed(isight->card);
704
705 return 0;
706}
707
708static void isight_bus_reset(struct fw_unit *unit)
709{
710 struct isight *isight = dev_get_drvdata(&unit->device);
711
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200712 if (fw_iso_resources_update(&isight->resources) < 0) {
713 isight_pcm_abort(isight);
Clemens Ladischf3f7c182011-05-11 11:07:09 +0200714
715 mutex_lock(&isight->mutex);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200716 isight_stop_streaming(isight);
Clemens Ladischf3f7c182011-05-11 11:07:09 +0200717 mutex_unlock(&isight->mutex);
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200718 }
Clemens Ladisch3a691b22011-05-11 10:44:51 +0200719}
720
721static const struct ieee1394_device_id isight_id_table[] = {
722 {
723 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
724 IEEE1394_MATCH_VERSION,
725 .specifier_id = OUI_APPLE,
726 .version = SW_ISIGHT_AUDIO,
727 },
728 { }
729};
730MODULE_DEVICE_TABLE(ieee1394, isight_id_table);
731
732static struct fw_driver isight_driver = {
733 .driver = {
734 .owner = THIS_MODULE,
735 .name = KBUILD_MODNAME,
736 .bus = &fw_bus_type,
737 .probe = isight_probe,
738 .remove = isight_remove,
739 },
740 .update = isight_bus_reset,
741 .id_table = isight_id_table,
742};
743
744static int __init alsa_isight_init(void)
745{
746 return driver_register(&isight_driver.driver);
747}
748
749static void __exit alsa_isight_exit(void)
750{
751 driver_unregister(&isight_driver.driver);
752}
753
754module_init(alsa_isight_init);
755module_exit(alsa_isight_exit);