diff options
Diffstat (limited to 'drivers/media/usb/tm6000/tm6000-alsa.c')
-rw-r--r-- | drivers/media/usb/tm6000/tm6000-alsa.c | 528 |
1 files changed, 528 insertions, 0 deletions
diff --git a/drivers/media/usb/tm6000/tm6000-alsa.c b/drivers/media/usb/tm6000/tm6000-alsa.c new file mode 100644 index 000000000000..bd07ec707956 --- /dev/null +++ b/drivers/media/usb/tm6000/tm6000-alsa.c | |||
@@ -0,0 +1,528 @@ | |||
1 | /* | ||
2 | * | ||
3 | * Support for audio capture for tm5600/6000/6010 | ||
4 | * (c) 2007-2008 Mauro Carvalho Chehab <mchehab@redhat.com> | ||
5 | * | ||
6 | * Based on cx88-alsa.c | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License version 2 as | ||
10 | * published by the Free Software Foundation. | ||
11 | */ | ||
12 | |||
13 | #include <linux/module.h> | ||
14 | #include <linux/init.h> | ||
15 | #include <linux/device.h> | ||
16 | #include <linux/interrupt.h> | ||
17 | #include <linux/usb.h> | ||
18 | #include <linux/slab.h> | ||
19 | #include <linux/vmalloc.h> | ||
20 | |||
21 | #include <linux/delay.h> | ||
22 | #include <sound/core.h> | ||
23 | #include <sound/pcm.h> | ||
24 | #include <sound/pcm_params.h> | ||
25 | #include <sound/control.h> | ||
26 | #include <sound/initval.h> | ||
27 | |||
28 | |||
29 | #include "tm6000.h" | ||
30 | #include "tm6000-regs.h" | ||
31 | |||
32 | #undef dprintk | ||
33 | |||
34 | #define dprintk(level, fmt, arg...) do { \ | ||
35 | if (debug >= level) \ | ||
36 | printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg); \ | ||
37 | } while (0) | ||
38 | |||
39 | /**************************************************************************** | ||
40 | Module global static vars | ||
41 | ****************************************************************************/ | ||
42 | |||
43 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | ||
44 | |||
45 | static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1}; | ||
46 | |||
47 | module_param_array(enable, bool, NULL, 0444); | ||
48 | MODULE_PARM_DESC(enable, "Enable tm6000x soundcard. default enabled."); | ||
49 | |||
50 | module_param_array(index, int, NULL, 0444); | ||
51 | MODULE_PARM_DESC(index, "Index value for tm6000x capture interface(s)."); | ||
52 | |||
53 | |||
54 | /**************************************************************************** | ||
55 | Module macros | ||
56 | ****************************************************************************/ | ||
57 | |||
58 | MODULE_DESCRIPTION("ALSA driver module for tm5600/tm6000/tm6010 based TV cards"); | ||
59 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); | ||
60 | MODULE_LICENSE("GPL"); | ||
61 | MODULE_SUPPORTED_DEVICE("{{Trident,tm5600}," | ||
62 | "{{Trident,tm6000}," | ||
63 | "{{Trident,tm6010}"); | ||
64 | static unsigned int debug; | ||
65 | module_param(debug, int, 0644); | ||
66 | MODULE_PARM_DESC(debug, "enable debug messages"); | ||
67 | |||
68 | /**************************************************************************** | ||
69 | Module specific funtions | ||
70 | ****************************************************************************/ | ||
71 | |||
72 | /* | ||
73 | * BOARD Specific: Sets audio DMA | ||
74 | */ | ||
75 | |||
76 | static int _tm6000_start_audio_dma(struct snd_tm6000_card *chip) | ||
77 | { | ||
78 | struct tm6000_core *core = chip->core; | ||
79 | |||
80 | dprintk(1, "Starting audio DMA\n"); | ||
81 | |||
82 | /* Enables audio */ | ||
83 | tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_IF, 0x40, 0x40); | ||
84 | |||
85 | tm6000_set_audio_bitrate(core, 48000); | ||
86 | |||
87 | return 0; | ||
88 | } | ||
89 | |||
90 | /* | ||
91 | * BOARD Specific: Resets audio DMA | ||
92 | */ | ||
93 | static int _tm6000_stop_audio_dma(struct snd_tm6000_card *chip) | ||
94 | { | ||
95 | struct tm6000_core *core = chip->core; | ||
96 | |||
97 | dprintk(1, "Stopping audio DMA\n"); | ||
98 | |||
99 | /* Disables audio */ | ||
100 | tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_IF, 0x00, 0x40); | ||
101 | |||
102 | return 0; | ||
103 | } | ||
104 | |||
105 | static void dsp_buffer_free(struct snd_pcm_substream *substream) | ||
106 | { | ||
107 | struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); | ||
108 | |||
109 | dprintk(2, "Freeing buffer\n"); | ||
110 | |||
111 | vfree(substream->runtime->dma_area); | ||
112 | substream->runtime->dma_area = NULL; | ||
113 | substream->runtime->dma_bytes = 0; | ||
114 | } | ||
115 | |||
116 | static int dsp_buffer_alloc(struct snd_pcm_substream *substream, int size) | ||
117 | { | ||
118 | struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); | ||
119 | |||
120 | dprintk(2, "Allocating buffer\n"); | ||
121 | |||
122 | if (substream->runtime->dma_area) { | ||
123 | if (substream->runtime->dma_bytes > size) | ||
124 | return 0; | ||
125 | |||
126 | dsp_buffer_free(substream); | ||
127 | } | ||
128 | |||
129 | substream->runtime->dma_area = vmalloc(size); | ||
130 | if (!substream->runtime->dma_area) | ||
131 | return -ENOMEM; | ||
132 | |||
133 | substream->runtime->dma_bytes = size; | ||
134 | |||
135 | return 0; | ||
136 | } | ||
137 | |||
138 | |||
139 | /**************************************************************************** | ||
140 | ALSA PCM Interface | ||
141 | ****************************************************************************/ | ||
142 | |||
143 | /* | ||
144 | * Digital hardware definition | ||
145 | */ | ||
146 | #define DEFAULT_FIFO_SIZE 4096 | ||
147 | |||
148 | static struct snd_pcm_hardware snd_tm6000_digital_hw = { | ||
149 | .info = SNDRV_PCM_INFO_BATCH | | ||
150 | SNDRV_PCM_INFO_MMAP | | ||
151 | SNDRV_PCM_INFO_INTERLEAVED | | ||
152 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | ||
153 | SNDRV_PCM_INFO_MMAP_VALID, | ||
154 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | ||
155 | |||
156 | .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT, | ||
157 | .rate_min = 48000, | ||
158 | .rate_max = 48000, | ||
159 | .channels_min = 2, | ||
160 | .channels_max = 2, | ||
161 | .period_bytes_min = 64, | ||
162 | .period_bytes_max = 12544, | ||
163 | .periods_min = 2, | ||
164 | .periods_max = 98, | ||
165 | .buffer_bytes_max = 62720 * 8, | ||
166 | }; | ||
167 | |||
168 | /* | ||
169 | * audio pcm capture open callback | ||
170 | */ | ||
171 | static int snd_tm6000_pcm_open(struct snd_pcm_substream *substream) | ||
172 | { | ||
173 | struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); | ||
174 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
175 | int err; | ||
176 | |||
177 | err = snd_pcm_hw_constraint_pow2(runtime, 0, | ||
178 | SNDRV_PCM_HW_PARAM_PERIODS); | ||
179 | if (err < 0) | ||
180 | goto _error; | ||
181 | |||
182 | chip->substream = substream; | ||
183 | |||
184 | runtime->hw = snd_tm6000_digital_hw; | ||
185 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); | ||
186 | |||
187 | return 0; | ||
188 | _error: | ||
189 | dprintk(1, "Error opening PCM!\n"); | ||
190 | return err; | ||
191 | } | ||
192 | |||
193 | /* | ||
194 | * audio close callback | ||
195 | */ | ||
196 | static int snd_tm6000_close(struct snd_pcm_substream *substream) | ||
197 | { | ||
198 | struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); | ||
199 | struct tm6000_core *core = chip->core; | ||
200 | |||
201 | if (atomic_read(&core->stream_started) > 0) { | ||
202 | atomic_set(&core->stream_started, 0); | ||
203 | schedule_work(&core->wq_trigger); | ||
204 | } | ||
205 | |||
206 | return 0; | ||
207 | } | ||
208 | |||
209 | static int tm6000_fillbuf(struct tm6000_core *core, char *buf, int size) | ||
210 | { | ||
211 | struct snd_tm6000_card *chip = core->adev; | ||
212 | struct snd_pcm_substream *substream = chip->substream; | ||
213 | struct snd_pcm_runtime *runtime; | ||
214 | int period_elapsed = 0; | ||
215 | unsigned int stride, buf_pos; | ||
216 | int length; | ||
217 | |||
218 | if (atomic_read(&core->stream_started) == 0) | ||
219 | return 0; | ||
220 | |||
221 | if (!size || !substream) { | ||
222 | dprintk(1, "substream was NULL\n"); | ||
223 | return -EINVAL; | ||
224 | } | ||
225 | |||
226 | runtime = substream->runtime; | ||
227 | if (!runtime || !runtime->dma_area) { | ||
228 | dprintk(1, "runtime was NULL\n"); | ||
229 | return -EINVAL; | ||
230 | } | ||
231 | |||
232 | buf_pos = chip->buf_pos; | ||
233 | stride = runtime->frame_bits >> 3; | ||
234 | |||
235 | if (stride == 0) { | ||
236 | dprintk(1, "stride is zero\n"); | ||
237 | return -EINVAL; | ||
238 | } | ||
239 | |||
240 | length = size / stride; | ||
241 | if (length == 0) { | ||
242 | dprintk(1, "%s: length was zero\n", __func__); | ||
243 | return -EINVAL; | ||
244 | } | ||
245 | |||
246 | dprintk(1, "Copying %d bytes at %p[%d] - buf size=%d x %d\n", size, | ||
247 | runtime->dma_area, buf_pos, | ||
248 | (unsigned int)runtime->buffer_size, stride); | ||
249 | |||
250 | if (buf_pos + length >= runtime->buffer_size) { | ||
251 | unsigned int cnt = runtime->buffer_size - buf_pos; | ||
252 | memcpy(runtime->dma_area + buf_pos * stride, buf, cnt * stride); | ||
253 | memcpy(runtime->dma_area, buf + cnt * stride, | ||
254 | length * stride - cnt * stride); | ||
255 | } else | ||
256 | memcpy(runtime->dma_area + buf_pos * stride, buf, | ||
257 | length * stride); | ||
258 | |||
259 | snd_pcm_stream_lock(substream); | ||
260 | |||
261 | chip->buf_pos += length; | ||
262 | if (chip->buf_pos >= runtime->buffer_size) | ||
263 | chip->buf_pos -= runtime->buffer_size; | ||
264 | |||
265 | chip->period_pos += length; | ||
266 | if (chip->period_pos >= runtime->period_size) { | ||
267 | chip->period_pos -= runtime->period_size; | ||
268 | period_elapsed = 1; | ||
269 | } | ||
270 | |||
271 | snd_pcm_stream_unlock(substream); | ||
272 | |||
273 | if (period_elapsed) | ||
274 | snd_pcm_period_elapsed(substream); | ||
275 | |||
276 | return 0; | ||
277 | } | ||
278 | |||
279 | /* | ||
280 | * hw_params callback | ||
281 | */ | ||
282 | static int snd_tm6000_hw_params(struct snd_pcm_substream *substream, | ||
283 | struct snd_pcm_hw_params *hw_params) | ||
284 | { | ||
285 | int size, rc; | ||
286 | |||
287 | size = params_period_bytes(hw_params) * params_periods(hw_params); | ||
288 | |||
289 | rc = dsp_buffer_alloc(substream, size); | ||
290 | if (rc < 0) | ||
291 | return rc; | ||
292 | |||
293 | return 0; | ||
294 | } | ||
295 | |||
296 | /* | ||
297 | * hw free callback | ||
298 | */ | ||
299 | static int snd_tm6000_hw_free(struct snd_pcm_substream *substream) | ||
300 | { | ||
301 | struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); | ||
302 | struct tm6000_core *core = chip->core; | ||
303 | |||
304 | if (atomic_read(&core->stream_started) > 0) { | ||
305 | atomic_set(&core->stream_started, 0); | ||
306 | schedule_work(&core->wq_trigger); | ||
307 | } | ||
308 | |||
309 | dsp_buffer_free(substream); | ||
310 | return 0; | ||
311 | } | ||
312 | |||
313 | /* | ||
314 | * prepare callback | ||
315 | */ | ||
316 | static int snd_tm6000_prepare(struct snd_pcm_substream *substream) | ||
317 | { | ||
318 | struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); | ||
319 | |||
320 | chip->buf_pos = 0; | ||
321 | chip->period_pos = 0; | ||
322 | |||
323 | return 0; | ||
324 | } | ||
325 | |||
326 | |||
327 | /* | ||
328 | * trigger callback | ||
329 | */ | ||
330 | static void audio_trigger(struct work_struct *work) | ||
331 | { | ||
332 | struct tm6000_core *core = container_of(work, struct tm6000_core, | ||
333 | wq_trigger); | ||
334 | struct snd_tm6000_card *chip = core->adev; | ||
335 | |||
336 | if (atomic_read(&core->stream_started)) { | ||
337 | dprintk(1, "starting capture"); | ||
338 | _tm6000_start_audio_dma(chip); | ||
339 | } else { | ||
340 | dprintk(1, "stopping capture"); | ||
341 | _tm6000_stop_audio_dma(chip); | ||
342 | } | ||
343 | } | ||
344 | |||
345 | static int snd_tm6000_card_trigger(struct snd_pcm_substream *substream, int cmd) | ||
346 | { | ||
347 | struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); | ||
348 | struct tm6000_core *core = chip->core; | ||
349 | int err = 0; | ||
350 | |||
351 | switch (cmd) { | ||
352 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ | ||
353 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ | ||
354 | case SNDRV_PCM_TRIGGER_START: | ||
355 | atomic_set(&core->stream_started, 1); | ||
356 | break; | ||
357 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ | ||
358 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ | ||
359 | case SNDRV_PCM_TRIGGER_STOP: | ||
360 | atomic_set(&core->stream_started, 0); | ||
361 | break; | ||
362 | default: | ||
363 | err = -EINVAL; | ||
364 | break; | ||
365 | } | ||
366 | schedule_work(&core->wq_trigger); | ||
367 | |||
368 | return err; | ||
369 | } | ||
370 | /* | ||
371 | * pointer callback | ||
372 | */ | ||
373 | static snd_pcm_uframes_t snd_tm6000_pointer(struct snd_pcm_substream *substream) | ||
374 | { | ||
375 | struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); | ||
376 | |||
377 | return chip->buf_pos; | ||
378 | } | ||
379 | |||
380 | static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs, | ||
381 | unsigned long offset) | ||
382 | { | ||
383 | void *pageptr = subs->runtime->dma_area + offset; | ||
384 | |||
385 | return vmalloc_to_page(pageptr); | ||
386 | } | ||
387 | |||
388 | /* | ||
389 | * operators | ||
390 | */ | ||
391 | static struct snd_pcm_ops snd_tm6000_pcm_ops = { | ||
392 | .open = snd_tm6000_pcm_open, | ||
393 | .close = snd_tm6000_close, | ||
394 | .ioctl = snd_pcm_lib_ioctl, | ||
395 | .hw_params = snd_tm6000_hw_params, | ||
396 | .hw_free = snd_tm6000_hw_free, | ||
397 | .prepare = snd_tm6000_prepare, | ||
398 | .trigger = snd_tm6000_card_trigger, | ||
399 | .pointer = snd_tm6000_pointer, | ||
400 | .page = snd_pcm_get_vmalloc_page, | ||
401 | }; | ||
402 | |||
403 | /* | ||
404 | * create a PCM device | ||
405 | */ | ||
406 | |||
407 | /* FIXME: Control interface - How to control volume/mute? */ | ||
408 | |||
409 | /**************************************************************************** | ||
410 | Basic Flow for Sound Devices | ||
411 | ****************************************************************************/ | ||
412 | |||
413 | /* | ||
414 | * Alsa Constructor - Component probe | ||
415 | */ | ||
416 | static int tm6000_audio_init(struct tm6000_core *dev) | ||
417 | { | ||
418 | struct snd_card *card; | ||
419 | struct snd_tm6000_card *chip; | ||
420 | int rc; | ||
421 | static int devnr; | ||
422 | char component[14]; | ||
423 | struct snd_pcm *pcm; | ||
424 | |||
425 | if (!dev) | ||
426 | return 0; | ||
427 | |||
428 | if (devnr >= SNDRV_CARDS) | ||
429 | return -ENODEV; | ||
430 | |||
431 | if (!enable[devnr]) | ||
432 | return -ENOENT; | ||
433 | |||
434 | rc = snd_card_create(index[devnr], "tm6000", THIS_MODULE, 0, &card); | ||
435 | if (rc < 0) { | ||
436 | snd_printk(KERN_ERR "cannot create card instance %d\n", devnr); | ||
437 | return rc; | ||
438 | } | ||
439 | strcpy(card->driver, "tm6000-alsa"); | ||
440 | strcpy(card->shortname, "TM5600/60x0"); | ||
441 | sprintf(card->longname, "TM5600/60x0 Audio at bus %d device %d", | ||
442 | dev->udev->bus->busnum, dev->udev->devnum); | ||
443 | |||
444 | sprintf(component, "USB%04x:%04x", | ||
445 | le16_to_cpu(dev->udev->descriptor.idVendor), | ||
446 | le16_to_cpu(dev->udev->descriptor.idProduct)); | ||
447 | snd_component_add(card, component); | ||
448 | snd_card_set_dev(card, &dev->udev->dev); | ||
449 | |||
450 | chip = kzalloc(sizeof(struct snd_tm6000_card), GFP_KERNEL); | ||
451 | if (!chip) { | ||
452 | rc = -ENOMEM; | ||
453 | goto error; | ||
454 | } | ||
455 | |||
456 | chip->core = dev; | ||
457 | chip->card = card; | ||
458 | dev->adev = chip; | ||
459 | spin_lock_init(&chip->reg_lock); | ||
460 | |||
461 | rc = snd_pcm_new(card, "TM6000 Audio", 0, 0, 1, &pcm); | ||
462 | if (rc < 0) | ||
463 | goto error_chip; | ||
464 | |||
465 | pcm->info_flags = 0; | ||
466 | pcm->private_data = chip; | ||
467 | strcpy(pcm->name, "Trident TM5600/60x0"); | ||
468 | |||
469 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_tm6000_pcm_ops); | ||
470 | |||
471 | INIT_WORK(&dev->wq_trigger, audio_trigger); | ||
472 | rc = snd_card_register(card); | ||
473 | if (rc < 0) | ||
474 | goto error_chip; | ||
475 | |||
476 | dprintk(1, "Registered audio driver for %s\n", card->longname); | ||
477 | |||
478 | return 0; | ||
479 | |||
480 | error_chip: | ||
481 | kfree(chip); | ||
482 | dev->adev = NULL; | ||
483 | error: | ||
484 | snd_card_free(card); | ||
485 | return rc; | ||
486 | } | ||
487 | |||
488 | static int tm6000_audio_fini(struct tm6000_core *dev) | ||
489 | { | ||
490 | struct snd_tm6000_card *chip = dev->adev; | ||
491 | |||
492 | if (!dev) | ||
493 | return 0; | ||
494 | |||
495 | if (!chip) | ||
496 | return 0; | ||
497 | |||
498 | if (!chip->card) | ||
499 | return 0; | ||
500 | |||
501 | snd_card_free(chip->card); | ||
502 | chip->card = NULL; | ||
503 | kfree(chip); | ||
504 | dev->adev = NULL; | ||
505 | |||
506 | return 0; | ||
507 | } | ||
508 | |||
509 | static struct tm6000_ops audio_ops = { | ||
510 | .type = TM6000_AUDIO, | ||
511 | .name = "TM6000 Audio Extension", | ||
512 | .init = tm6000_audio_init, | ||
513 | .fini = tm6000_audio_fini, | ||
514 | .fillbuf = tm6000_fillbuf, | ||
515 | }; | ||
516 | |||
517 | static int __init tm6000_alsa_register(void) | ||
518 | { | ||
519 | return tm6000_register_extension(&audio_ops); | ||
520 | } | ||
521 | |||
522 | static void __exit tm6000_alsa_unregister(void) | ||
523 | { | ||
524 | tm6000_unregister_extension(&audio_ops); | ||
525 | } | ||
526 | |||
527 | module_init(tm6000_alsa_register); | ||
528 | module_exit(tm6000_alsa_unregister); | ||