Root/
1 | /* |
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 | |
8 | #include <asm/byteorder.h> |
9 | #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 | |
49 | struct isight { |
50 | struct snd_card *card; |
51 | struct fw_unit *unit; |
52 | struct fw_device *device; |
53 | u64 audio_base; |
54 | struct fw_address_handler iris_handler; |
55 | struct snd_pcm_substream *pcm; |
56 | struct mutex mutex; |
57 | struct iso_packets_buffer buffer; |
58 | struct fw_iso_resources resources; |
59 | struct fw_iso_context *context; |
60 | bool pcm_active; |
61 | bool pcm_running; |
62 | bool first_packet; |
63 | int packet_index; |
64 | u32 total_samples; |
65 | unsigned int buffer_pointer; |
66 | unsigned int period_counter; |
67 | s32 gain_min, gain_max; |
68 | unsigned int gain_tlv[4]; |
69 | }; |
70 | |
71 | struct audio_payload { |
72 | __be32 sample_count; |
73 | __be32 signature; |
74 | __be32 sample_total; |
75 | __be32 reserved; |
76 | __be16 samples[2 * MAX_FRAMES_PER_PACKET]; |
77 | }; |
78 | |
79 | MODULE_DESCRIPTION("iSight audio driver"); |
80 | MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); |
81 | MODULE_LICENSE("GPL v2"); |
82 | |
83 | static struct fw_iso_packet audio_packet = { |
84 | .payload_length = sizeof(struct audio_payload), |
85 | .interrupt = 1, |
86 | .header_length = 4, |
87 | }; |
88 | |
89 | static void isight_update_pointers(struct isight *isight, unsigned int count) |
90 | { |
91 | struct snd_pcm_runtime *runtime = isight->pcm->runtime; |
92 | unsigned int ptr; |
93 | |
94 | smp_wmb(); /* update buffer data before buffer pointer */ |
95 | |
96 | ptr = isight->buffer_pointer; |
97 | ptr += count; |
98 | if (ptr >= runtime->buffer_size) |
99 | ptr -= runtime->buffer_size; |
100 | ACCESS_ONCE(isight->buffer_pointer) = ptr; |
101 | |
102 | isight->period_counter += count; |
103 | if (isight->period_counter >= runtime->period_size) { |
104 | isight->period_counter -= runtime->period_size; |
105 | snd_pcm_period_elapsed(isight->pcm); |
106 | } |
107 | } |
108 | |
109 | static void isight_samples(struct isight *isight, |
110 | const __be16 *samples, unsigned int count) |
111 | { |
112 | struct snd_pcm_runtime *runtime; |
113 | unsigned int count1; |
114 | |
115 | if (!ACCESS_ONCE(isight->pcm_running)) |
116 | return; |
117 | |
118 | runtime = isight->pcm->runtime; |
119 | if (isight->buffer_pointer + count <= runtime->buffer_size) { |
120 | memcpy(runtime->dma_area + isight->buffer_pointer * 4, |
121 | samples, count * 4); |
122 | } else { |
123 | count1 = runtime->buffer_size - isight->buffer_pointer; |
124 | memcpy(runtime->dma_area + isight->buffer_pointer * 4, |
125 | samples, count1 * 4); |
126 | samples += count1 * 2; |
127 | memcpy(runtime->dma_area, samples, (count - count1) * 4); |
128 | } |
129 | |
130 | isight_update_pointers(isight, count); |
131 | } |
132 | |
133 | static void isight_pcm_abort(struct isight *isight) |
134 | { |
135 | unsigned long flags; |
136 | |
137 | if (ACCESS_ONCE(isight->pcm_active)) { |
138 | snd_pcm_stream_lock_irqsave(isight->pcm, flags); |
139 | if (snd_pcm_running(isight->pcm)) |
140 | snd_pcm_stop(isight->pcm, SNDRV_PCM_STATE_XRUN); |
141 | snd_pcm_stream_unlock_irqrestore(isight->pcm, flags); |
142 | } |
143 | } |
144 | |
145 | static void isight_dropped_samples(struct isight *isight, unsigned int total) |
146 | { |
147 | struct snd_pcm_runtime *runtime; |
148 | u32 dropped; |
149 | unsigned int count1; |
150 | |
151 | if (!ACCESS_ONCE(isight->pcm_running)) |
152 | return; |
153 | |
154 | runtime = isight->pcm->runtime; |
155 | dropped = total - isight->total_samples; |
156 | if (dropped < runtime->buffer_size) { |
157 | if (isight->buffer_pointer + dropped <= runtime->buffer_size) { |
158 | memset(runtime->dma_area + isight->buffer_pointer * 4, |
159 | 0, dropped * 4); |
160 | } else { |
161 | count1 = runtime->buffer_size - isight->buffer_pointer; |
162 | memset(runtime->dma_area + isight->buffer_pointer * 4, |
163 | 0, count1 * 4); |
164 | memset(runtime->dma_area, 0, (dropped - count1) * 4); |
165 | } |
166 | isight_update_pointers(isight, dropped); |
167 | } else { |
168 | isight_pcm_abort(isight); |
169 | } |
170 | } |
171 | |
172 | static void isight_packet(struct fw_iso_context *context, u32 cycle, |
173 | size_t header_length, void *header, void *data) |
174 | { |
175 | struct isight *isight = data; |
176 | const struct audio_payload *payload; |
177 | unsigned int index, length, count, total; |
178 | int err; |
179 | |
180 | if (isight->packet_index < 0) |
181 | return; |
182 | index = isight->packet_index; |
183 | payload = isight->buffer.packets[index].buffer; |
184 | length = be32_to_cpup(header) >> 16; |
185 | |
186 | if (likely(length >= 16 && |
187 | payload->signature == cpu_to_be32(0x73676874/*"sght"*/))) { |
188 | count = be32_to_cpu(payload->sample_count); |
189 | if (likely(count <= (length - 16) / 4)) { |
190 | total = be32_to_cpu(payload->sample_total); |
191 | if (unlikely(total != isight->total_samples)) { |
192 | if (!isight->first_packet) |
193 | isight_dropped_samples(isight, total); |
194 | isight->first_packet = false; |
195 | isight->total_samples = total; |
196 | } |
197 | |
198 | isight_samples(isight, payload->samples, count); |
199 | isight->total_samples += count; |
200 | } |
201 | } |
202 | |
203 | err = fw_iso_context_queue(isight->context, &audio_packet, |
204 | &isight->buffer.iso_buffer, |
205 | isight->buffer.packets[index].offset); |
206 | if (err < 0) { |
207 | dev_err(&isight->unit->device, "queueing error: %d\n", err); |
208 | isight_pcm_abort(isight); |
209 | isight->packet_index = -1; |
210 | return; |
211 | } |
212 | fw_iso_context_queue_flush(isight->context); |
213 | |
214 | if (++index >= QUEUE_LENGTH) |
215 | index = 0; |
216 | isight->packet_index = index; |
217 | } |
218 | |
219 | static int isight_connect(struct isight *isight) |
220 | { |
221 | int ch, err, rcode, errors = 0; |
222 | __be32 value; |
223 | |
224 | retry_after_bus_reset: |
225 | ch = fw_iso_resources_allocate(&isight->resources, |
226 | sizeof(struct audio_payload), |
227 | isight->device->max_speed); |
228 | if (ch < 0) { |
229 | err = ch; |
230 | goto error; |
231 | } |
232 | |
233 | value = cpu_to_be32(ch | (isight->device->max_speed << SPEED_SHIFT)); |
234 | for (;;) { |
235 | rcode = fw_run_transaction( |
236 | isight->device->card, |
237 | TCODE_WRITE_QUADLET_REQUEST, |
238 | isight->device->node_id, |
239 | isight->resources.generation, |
240 | isight->device->max_speed, |
241 | isight->audio_base + REG_ISO_TX_CONFIG, |
242 | &value, 4); |
243 | if (rcode == RCODE_COMPLETE) { |
244 | return 0; |
245 | } else if (rcode == RCODE_GENERATION) { |
246 | fw_iso_resources_free(&isight->resources); |
247 | goto retry_after_bus_reset; |
248 | } else if (rcode_is_permanent_error(rcode) || ++errors >= 3) { |
249 | err = -EIO; |
250 | goto err_resources; |
251 | } |
252 | msleep(5); |
253 | } |
254 | |
255 | err_resources: |
256 | fw_iso_resources_free(&isight->resources); |
257 | error: |
258 | return err; |
259 | } |
260 | |
261 | static int isight_open(struct snd_pcm_substream *substream) |
262 | { |
263 | static const struct snd_pcm_hardware hardware = { |
264 | .info = SNDRV_PCM_INFO_MMAP | |
265 | SNDRV_PCM_INFO_MMAP_VALID | |
266 | SNDRV_PCM_INFO_BATCH | |
267 | SNDRV_PCM_INFO_INTERLEAVED | |
268 | SNDRV_PCM_INFO_BLOCK_TRANSFER, |
269 | .formats = SNDRV_PCM_FMTBIT_S16_BE, |
270 | .rates = SNDRV_PCM_RATE_48000, |
271 | .rate_min = 48000, |
272 | .rate_max = 48000, |
273 | .channels_min = 2, |
274 | .channels_max = 2, |
275 | .buffer_bytes_max = 4 * 1024 * 1024, |
276 | .period_bytes_min = MAX_FRAMES_PER_PACKET * 4, |
277 | .period_bytes_max = 1024 * 1024, |
278 | .periods_min = 2, |
279 | .periods_max = UINT_MAX, |
280 | }; |
281 | struct isight *isight = substream->private_data; |
282 | |
283 | substream->runtime->hw = hardware; |
284 | |
285 | return iso_packets_buffer_init(&isight->buffer, isight->unit, |
286 | QUEUE_LENGTH, |
287 | sizeof(struct audio_payload), |
288 | DMA_FROM_DEVICE); |
289 | } |
290 | |
291 | static int isight_close(struct snd_pcm_substream *substream) |
292 | { |
293 | struct isight *isight = substream->private_data; |
294 | |
295 | iso_packets_buffer_destroy(&isight->buffer, isight->unit); |
296 | |
297 | return 0; |
298 | } |
299 | |
300 | static int isight_hw_params(struct snd_pcm_substream *substream, |
301 | struct snd_pcm_hw_params *hw_params) |
302 | { |
303 | struct isight *isight = substream->private_data; |
304 | int err; |
305 | |
306 | err = snd_pcm_lib_alloc_vmalloc_buffer(substream, |
307 | params_buffer_bytes(hw_params)); |
308 | if (err < 0) |
309 | return err; |
310 | |
311 | ACCESS_ONCE(isight->pcm_active) = true; |
312 | |
313 | return 0; |
314 | } |
315 | |
316 | static int reg_read(struct isight *isight, int offset, __be32 *value) |
317 | { |
318 | return snd_fw_transaction(isight->unit, TCODE_READ_QUADLET_REQUEST, |
319 | isight->audio_base + offset, value, 4); |
320 | } |
321 | |
322 | static int reg_write(struct isight *isight, int offset, __be32 value) |
323 | { |
324 | return snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST, |
325 | isight->audio_base + offset, &value, 4); |
326 | } |
327 | |
328 | static void isight_stop_streaming(struct isight *isight) |
329 | { |
330 | if (!isight->context) |
331 | return; |
332 | |
333 | fw_iso_context_stop(isight->context); |
334 | fw_iso_context_destroy(isight->context); |
335 | isight->context = NULL; |
336 | fw_iso_resources_free(&isight->resources); |
337 | reg_write(isight, REG_AUDIO_ENABLE, 0); |
338 | } |
339 | |
340 | static int isight_hw_free(struct snd_pcm_substream *substream) |
341 | { |
342 | struct isight *isight = substream->private_data; |
343 | |
344 | ACCESS_ONCE(isight->pcm_active) = false; |
345 | |
346 | mutex_lock(&isight->mutex); |
347 | isight_stop_streaming(isight); |
348 | mutex_unlock(&isight->mutex); |
349 | |
350 | return snd_pcm_lib_free_vmalloc_buffer(substream); |
351 | } |
352 | |
353 | static int isight_start_streaming(struct isight *isight) |
354 | { |
355 | unsigned int i; |
356 | int err; |
357 | |
358 | if (isight->context) { |
359 | if (isight->packet_index < 0) |
360 | isight_stop_streaming(isight); |
361 | else |
362 | return 0; |
363 | } |
364 | |
365 | err = reg_write(isight, REG_SAMPLE_RATE, cpu_to_be32(RATE_48000)); |
366 | if (err < 0) |
367 | goto error; |
368 | |
369 | err = isight_connect(isight); |
370 | if (err < 0) |
371 | goto error; |
372 | |
373 | err = reg_write(isight, REG_AUDIO_ENABLE, cpu_to_be32(AUDIO_ENABLE)); |
374 | if (err < 0) |
375 | goto err_resources; |
376 | |
377 | isight->context = fw_iso_context_create(isight->device->card, |
378 | FW_ISO_CONTEXT_RECEIVE, |
379 | isight->resources.channel, |
380 | isight->device->max_speed, |
381 | 4, isight_packet, isight); |
382 | if (IS_ERR(isight->context)) { |
383 | err = PTR_ERR(isight->context); |
384 | isight->context = NULL; |
385 | goto err_resources; |
386 | } |
387 | |
388 | for (i = 0; i < QUEUE_LENGTH; ++i) { |
389 | err = fw_iso_context_queue(isight->context, &audio_packet, |
390 | &isight->buffer.iso_buffer, |
391 | isight->buffer.packets[i].offset); |
392 | if (err < 0) |
393 | goto err_context; |
394 | } |
395 | |
396 | isight->first_packet = true; |
397 | isight->packet_index = 0; |
398 | |
399 | err = fw_iso_context_start(isight->context, -1, 0, |
400 | FW_ISO_CONTEXT_MATCH_ALL_TAGS/*?*/); |
401 | if (err < 0) |
402 | goto err_context; |
403 | |
404 | return 0; |
405 | |
406 | err_context: |
407 | fw_iso_context_destroy(isight->context); |
408 | isight->context = NULL; |
409 | err_resources: |
410 | fw_iso_resources_free(&isight->resources); |
411 | reg_write(isight, REG_AUDIO_ENABLE, 0); |
412 | error: |
413 | return err; |
414 | } |
415 | |
416 | static int isight_prepare(struct snd_pcm_substream *substream) |
417 | { |
418 | struct isight *isight = substream->private_data; |
419 | int err; |
420 | |
421 | isight->buffer_pointer = 0; |
422 | isight->period_counter = 0; |
423 | |
424 | mutex_lock(&isight->mutex); |
425 | err = isight_start_streaming(isight); |
426 | mutex_unlock(&isight->mutex); |
427 | |
428 | return err; |
429 | } |
430 | |
431 | static int isight_trigger(struct snd_pcm_substream *substream, int cmd) |
432 | { |
433 | struct isight *isight = substream->private_data; |
434 | |
435 | switch (cmd) { |
436 | case SNDRV_PCM_TRIGGER_START: |
437 | ACCESS_ONCE(isight->pcm_running) = true; |
438 | break; |
439 | case SNDRV_PCM_TRIGGER_STOP: |
440 | ACCESS_ONCE(isight->pcm_running) = false; |
441 | break; |
442 | default: |
443 | return -EINVAL; |
444 | } |
445 | return 0; |
446 | } |
447 | |
448 | static snd_pcm_uframes_t isight_pointer(struct snd_pcm_substream *substream) |
449 | { |
450 | struct isight *isight = substream->private_data; |
451 | |
452 | return ACCESS_ONCE(isight->buffer_pointer); |
453 | } |
454 | |
455 | static int isight_create_pcm(struct isight *isight) |
456 | { |
457 | static struct snd_pcm_ops ops = { |
458 | .open = isight_open, |
459 | .close = isight_close, |
460 | .ioctl = snd_pcm_lib_ioctl, |
461 | .hw_params = isight_hw_params, |
462 | .hw_free = isight_hw_free, |
463 | .prepare = isight_prepare, |
464 | .trigger = isight_trigger, |
465 | .pointer = isight_pointer, |
466 | .page = snd_pcm_lib_get_vmalloc_page, |
467 | .mmap = snd_pcm_lib_mmap_vmalloc, |
468 | }; |
469 | struct snd_pcm *pcm; |
470 | int err; |
471 | |
472 | err = snd_pcm_new(isight->card, "iSight", 0, 0, 1, &pcm); |
473 | if (err < 0) |
474 | return err; |
475 | pcm->private_data = isight; |
476 | strcpy(pcm->name, "iSight"); |
477 | isight->pcm = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; |
478 | isight->pcm->ops = &ops; |
479 | |
480 | return 0; |
481 | } |
482 | |
483 | static int isight_gain_info(struct snd_kcontrol *ctl, |
484 | struct snd_ctl_elem_info *info) |
485 | { |
486 | struct isight *isight = ctl->private_data; |
487 | |
488 | info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
489 | info->count = 1; |
490 | info->value.integer.min = isight->gain_min; |
491 | info->value.integer.max = isight->gain_max; |
492 | |
493 | return 0; |
494 | } |
495 | |
496 | static int isight_gain_get(struct snd_kcontrol *ctl, |
497 | struct snd_ctl_elem_value *value) |
498 | { |
499 | struct isight *isight = ctl->private_data; |
500 | __be32 gain; |
501 | int err; |
502 | |
503 | err = reg_read(isight, REG_GAIN, &gain); |
504 | if (err < 0) |
505 | return err; |
506 | |
507 | value->value.integer.value[0] = (s32)be32_to_cpu(gain); |
508 | |
509 | return 0; |
510 | } |
511 | |
512 | static int isight_gain_put(struct snd_kcontrol *ctl, |
513 | struct snd_ctl_elem_value *value) |
514 | { |
515 | struct isight *isight = ctl->private_data; |
516 | |
517 | if (value->value.integer.value[0] < isight->gain_min || |
518 | value->value.integer.value[0] > isight->gain_max) |
519 | return -EINVAL; |
520 | |
521 | return reg_write(isight, REG_GAIN, |
522 | cpu_to_be32(value->value.integer.value[0])); |
523 | } |
524 | |
525 | static int isight_mute_get(struct snd_kcontrol *ctl, |
526 | struct snd_ctl_elem_value *value) |
527 | { |
528 | struct isight *isight = ctl->private_data; |
529 | __be32 mute; |
530 | int err; |
531 | |
532 | err = reg_read(isight, REG_MUTE, &mute); |
533 | if (err < 0) |
534 | return err; |
535 | |
536 | value->value.integer.value[0] = !mute; |
537 | |
538 | return 0; |
539 | } |
540 | |
541 | static int isight_mute_put(struct snd_kcontrol *ctl, |
542 | struct snd_ctl_elem_value *value) |
543 | { |
544 | struct isight *isight = ctl->private_data; |
545 | |
546 | return reg_write(isight, REG_MUTE, |
547 | (__force __be32)!value->value.integer.value[0]); |
548 | } |
549 | |
550 | static int isight_create_mixer(struct isight *isight) |
551 | { |
552 | static const struct snd_kcontrol_new gain_control = { |
553 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
554 | .name = "Mic Capture Volume", |
555 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | |
556 | SNDRV_CTL_ELEM_ACCESS_TLV_READ, |
557 | .info = isight_gain_info, |
558 | .get = isight_gain_get, |
559 | .put = isight_gain_put, |
560 | }; |
561 | static const struct snd_kcontrol_new mute_control = { |
562 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
563 | .name = "Mic Capture Switch", |
564 | .info = snd_ctl_boolean_mono_info, |
565 | .get = isight_mute_get, |
566 | .put = isight_mute_put, |
567 | }; |
568 | __be32 value; |
569 | struct snd_kcontrol *ctl; |
570 | int err; |
571 | |
572 | err = reg_read(isight, REG_GAIN_RAW_START, &value); |
573 | if (err < 0) |
574 | return err; |
575 | isight->gain_min = be32_to_cpu(value); |
576 | |
577 | err = reg_read(isight, REG_GAIN_RAW_END, &value); |
578 | if (err < 0) |
579 | return err; |
580 | isight->gain_max = be32_to_cpu(value); |
581 | |
582 | isight->gain_tlv[0] = SNDRV_CTL_TLVT_DB_MINMAX; |
583 | isight->gain_tlv[1] = 2 * sizeof(unsigned int); |
584 | |
585 | err = reg_read(isight, REG_GAIN_DB_START, &value); |
586 | if (err < 0) |
587 | return err; |
588 | isight->gain_tlv[2] = (s32)be32_to_cpu(value) * 100; |
589 | |
590 | err = reg_read(isight, REG_GAIN_DB_END, &value); |
591 | if (err < 0) |
592 | return err; |
593 | isight->gain_tlv[3] = (s32)be32_to_cpu(value) * 100; |
594 | |
595 | ctl = snd_ctl_new1(&gain_control, isight); |
596 | if (ctl) |
597 | ctl->tlv.p = isight->gain_tlv; |
598 | err = snd_ctl_add(isight->card, ctl); |
599 | if (err < 0) |
600 | return err; |
601 | |
602 | err = snd_ctl_add(isight->card, snd_ctl_new1(&mute_control, isight)); |
603 | if (err < 0) |
604 | return err; |
605 | |
606 | return 0; |
607 | } |
608 | |
609 | static void isight_card_free(struct snd_card *card) |
610 | { |
611 | struct isight *isight = card->private_data; |
612 | |
613 | fw_iso_resources_destroy(&isight->resources); |
614 | fw_unit_put(isight->unit); |
615 | fw_device_put(isight->device); |
616 | mutex_destroy(&isight->mutex); |
617 | } |
618 | |
619 | static u64 get_unit_base(struct fw_unit *unit) |
620 | { |
621 | struct fw_csr_iterator i; |
622 | int key, value; |
623 | |
624 | fw_csr_iterator_init(&i, unit->directory); |
625 | while (fw_csr_iterator_next(&i, &key, &value)) |
626 | if (key == CSR_OFFSET) |
627 | return CSR_REGISTER_BASE + value * 4; |
628 | return 0; |
629 | } |
630 | |
631 | static int isight_probe(struct device *unit_dev) |
632 | { |
633 | struct fw_unit *unit = fw_unit(unit_dev); |
634 | struct fw_device *fw_dev = fw_parent_device(unit); |
635 | struct snd_card *card; |
636 | struct isight *isight; |
637 | int err; |
638 | |
639 | err = snd_card_create(-1, NULL, THIS_MODULE, sizeof(*isight), &card); |
640 | if (err < 0) |
641 | return err; |
642 | snd_card_set_dev(card, unit_dev); |
643 | |
644 | isight = card->private_data; |
645 | isight->card = card; |
646 | mutex_init(&isight->mutex); |
647 | isight->unit = fw_unit_get(unit); |
648 | isight->device = fw_device_get(fw_dev); |
649 | isight->audio_base = get_unit_base(unit); |
650 | if (!isight->audio_base) { |
651 | dev_err(&unit->device, "audio unit base not found\n"); |
652 | err = -ENXIO; |
653 | goto err_unit; |
654 | } |
655 | fw_iso_resources_init(&isight->resources, unit); |
656 | |
657 | card->private_free = isight_card_free; |
658 | |
659 | strcpy(card->driver, "iSight"); |
660 | strcpy(card->shortname, "Apple iSight"); |
661 | snprintf(card->longname, sizeof(card->longname), |
662 | "Apple iSight (GUID %08x%08x) at %s, S%d", |
663 | fw_dev->config_rom[3], fw_dev->config_rom[4], |
664 | dev_name(&unit->device), 100 << fw_dev->max_speed); |
665 | strcpy(card->mixername, "iSight"); |
666 | |
667 | err = isight_create_pcm(isight); |
668 | if (err < 0) |
669 | goto error; |
670 | |
671 | err = isight_create_mixer(isight); |
672 | if (err < 0) |
673 | goto error; |
674 | |
675 | err = snd_card_register(card); |
676 | if (err < 0) |
677 | goto error; |
678 | |
679 | dev_set_drvdata(unit_dev, isight); |
680 | |
681 | return 0; |
682 | |
683 | err_unit: |
684 | fw_unit_put(isight->unit); |
685 | fw_device_put(isight->device); |
686 | mutex_destroy(&isight->mutex); |
687 | error: |
688 | snd_card_free(card); |
689 | return err; |
690 | } |
691 | |
692 | static int isight_remove(struct device *dev) |
693 | { |
694 | struct isight *isight = dev_get_drvdata(dev); |
695 | |
696 | isight_pcm_abort(isight); |
697 | |
698 | snd_card_disconnect(isight->card); |
699 | |
700 | mutex_lock(&isight->mutex); |
701 | isight_stop_streaming(isight); |
702 | mutex_unlock(&isight->mutex); |
703 | |
704 | snd_card_free_when_closed(isight->card); |
705 | |
706 | return 0; |
707 | } |
708 | |
709 | static void isight_bus_reset(struct fw_unit *unit) |
710 | { |
711 | struct isight *isight = dev_get_drvdata(&unit->device); |
712 | |
713 | if (fw_iso_resources_update(&isight->resources) < 0) { |
714 | isight_pcm_abort(isight); |
715 | |
716 | mutex_lock(&isight->mutex); |
717 | isight_stop_streaming(isight); |
718 | mutex_unlock(&isight->mutex); |
719 | } |
720 | } |
721 | |
722 | static const struct ieee1394_device_id isight_id_table[] = { |
723 | { |
724 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
725 | IEEE1394_MATCH_VERSION, |
726 | .specifier_id = OUI_APPLE, |
727 | .version = SW_ISIGHT_AUDIO, |
728 | }, |
729 | { } |
730 | }; |
731 | MODULE_DEVICE_TABLE(ieee1394, isight_id_table); |
732 | |
733 | static struct fw_driver isight_driver = { |
734 | .driver = { |
735 | .owner = THIS_MODULE, |
736 | .name = KBUILD_MODNAME, |
737 | .bus = &fw_bus_type, |
738 | .probe = isight_probe, |
739 | .remove = isight_remove, |
740 | }, |
741 | .update = isight_bus_reset, |
742 | .id_table = isight_id_table, |
743 | }; |
744 | |
745 | static int __init alsa_isight_init(void) |
746 | { |
747 | return driver_register(&isight_driver.driver); |
748 | } |
749 | |
750 | static void __exit alsa_isight_exit(void) |
751 | { |
752 | driver_unregister(&isight_driver.driver); |
753 | } |
754 | |
755 | module_init(alsa_isight_init); |
756 | module_exit(alsa_isight_exit); |
757 |
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