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3a691b28 CL |
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 | ||
ac34dad2 | 8 | #include <asm/byteorder.h> |
3a691b28 CL |
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; | |
03c29680 | 60 | bool pcm_active; |
3a691b28 CL |
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, | |
f2934cd4 | 86 | .header_length = 4, |
3a691b28 CL |
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 | ||
03c29680 CL |
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 | } | |
3a691b28 CL |
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 | ||
3a691b28 CL |
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 | } | |
cf6f1ff1 | 212 | fw_iso_context_queue_flush(isight->context); |
3a691b28 | 213 | |
898732d1 CL |
214 | if (++index >= QUEUE_LENGTH) |
215 | index = 0; | |
3a691b28 CL |
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 | { | |
03c29680 CL |
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; | |
3a691b28 CL |
314 | } |
315 | ||
ac34dad2 | 316 | static int reg_read(struct isight *isight, int offset, __be32 *value) |
3a691b28 | 317 | { |
ac34dad2 SR |
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 | } | |
3a691b28 | 327 | |
ac34dad2 SR |
328 | static void isight_stop_streaming(struct isight *isight) |
329 | { | |
3a691b28 CL |
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; | |
3a691b28 | 336 | fw_iso_resources_free(&isight->resources); |
ac34dad2 | 337 | reg_write(isight, REG_AUDIO_ENABLE, 0); |
3a691b28 CL |
338 | } |
339 | ||
340 | static int isight_hw_free(struct snd_pcm_substream *substream) | |
341 | { | |
342 | struct isight *isight = substream->private_data; | |
343 | ||
03c29680 CL |
344 | ACCESS_ONCE(isight->pcm_active) = false; |
345 | ||
3a691b28 CL |
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 | { | |
3a691b28 CL |
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 | ||
ac34dad2 | 365 | err = reg_write(isight, REG_SAMPLE_RATE, cpu_to_be32(RATE_48000)); |
3a691b28 | 366 | if (err < 0) |
ac34dad2 | 367 | goto error; |
3a691b28 CL |
368 | |
369 | err = isight_connect(isight); | |
370 | if (err < 0) | |
371 | goto error; | |
372 | ||
ac34dad2 | 373 | err = reg_write(isight, REG_AUDIO_ENABLE, cpu_to_be32(AUDIO_ENABLE)); |
8839eeda SR |
374 | if (err < 0) |
375 | goto err_resources; | |
376 | ||
3a691b28 CL |
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); | |
ac34dad2 | 411 | reg_write(isight, REG_AUDIO_ENABLE, 0); |
3a691b28 CL |
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 | ||
ac34dad2 | 503 | err = reg_read(isight, REG_GAIN, &gain); |
3a691b28 CL |
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; | |
3a691b28 CL |
516 | |
517 | if (value->value.integer.value[0] < isight->gain_min || | |
518 | value->value.integer.value[0] > isight->gain_max) | |
519 | return -EINVAL; | |
520 | ||
ac34dad2 SR |
521 | return reg_write(isight, REG_GAIN, |
522 | cpu_to_be32(value->value.integer.value[0])); | |
3a691b28 CL |
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 | ||
ac34dad2 | 532 | err = reg_read(isight, REG_MUTE, &mute); |
3a691b28 CL |
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; | |
3a691b28 | 545 | |
ac34dad2 SR |
546 | return reg_write(isight, REG_MUTE, |
547 | (__force __be32)!value->value.integer.value[0]); | |
3a691b28 CL |
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 | ||
ac34dad2 | 572 | err = reg_read(isight, REG_GAIN_RAW_START, &value); |
3a691b28 CL |
573 | if (err < 0) |
574 | return err; | |
575 | isight->gain_min = be32_to_cpu(value); | |
576 | ||
ac34dad2 | 577 | err = reg_read(isight, REG_GAIN_RAW_END, &value); |
3a691b28 CL |
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); | |
ac34dad2 SR |
584 | |
585 | err = reg_read(isight, REG_GAIN_DB_START, &value); | |
3a691b28 CL |
586 | if (err < 0) |
587 | return err; | |
588 | isight->gain_tlv[2] = (s32)be32_to_cpu(value) * 100; | |
ac34dad2 SR |
589 | |
590 | err = reg_read(isight, REG_GAIN_DB_END, &value); | |
3a691b28 CL |
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 | ||
3a691b28 | 696 | isight_pcm_abort(isight); |
f3f7c183 | 697 | |
aee70400 | 698 | snd_card_disconnect(isight->card); |
f3f7c183 CL |
699 | |
700 | mutex_lock(&isight->mutex); | |
3a691b28 CL |
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 | ||
3a691b28 CL |
713 | if (fw_iso_resources_update(&isight->resources) < 0) { |
714 | isight_pcm_abort(isight); | |
f3f7c183 CL |
715 | |
716 | mutex_lock(&isight->mutex); | |
3a691b28 | 717 | isight_stop_streaming(isight); |
f3f7c183 | 718 | mutex_unlock(&isight->mutex); |
3a691b28 | 719 | } |
3a691b28 CL |
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); |