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path: root/drivers/staging/tm6000/tm6000-alsa.c
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-rw-r--r--drivers/staging/tm6000/tm6000-alsa.c512
1 files changed, 512 insertions, 0 deletions
diff --git a/drivers/staging/tm6000/tm6000-alsa.c b/drivers/staging/tm6000/tm6000-alsa.c
new file mode 100644
index 00000000000..bd5fa89af07
--- /dev/null
+++ b/drivers/staging/tm6000/tm6000-alsa.c
@@ -0,0 +1,512 @@
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
43static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
44
45static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
46
47module_param_array(enable, bool, NULL, 0444);
48MODULE_PARM_DESC(enable, "Enable tm6000x soundcard. default enabled.");
49
50module_param_array(index, int, NULL, 0444);
51MODULE_PARM_DESC(index, "Index value for tm6000x capture interface(s).");
52
53
54/****************************************************************************
55 Module macros
56 ****************************************************************************/
57
58MODULE_DESCRIPTION("ALSA driver module for tm5600/tm6000/tm6010 based TV cards");
59MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
60MODULE_LICENSE("GPL");
61MODULE_SUPPORTED_DEVICE("{{Trident,tm5600},"
62 "{{Trident,tm6000},"
63 "{{Trident,tm6010}");
64static unsigned int debug;
65module_param(debug, int, 0644);
66MODULE_PARM_DESC(debug, "enable debug messages");
67
68/****************************************************************************
69 Module specific funtions
70 ****************************************************************************/
71
72/*
73 * BOARD Specific: Sets audio DMA
74 */
75
76static 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_VIDEO_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 */
93static 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_VIDEO_IF, 0x00, 0x40);
101
102 return 0;
103}
104
105static 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
116static 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
148static struct snd_pcm_hardware snd_tm6000_digital_hw = {
149 .info = SNDRV_PCM_INFO_MMAP |
150 SNDRV_PCM_INFO_INTERLEAVED |
151 SNDRV_PCM_INFO_BLOCK_TRANSFER |
152 SNDRV_PCM_INFO_MMAP_VALID,
153 .formats = SNDRV_PCM_FMTBIT_S16_LE,
154
155 .rates = SNDRV_PCM_RATE_CONTINUOUS,
156 .rate_min = 48000,
157 .rate_max = 48000,
158 .channels_min = 2,
159 .channels_max = 2,
160 .period_bytes_min = 64,
161 .period_bytes_max = 12544,
162 .periods_min = 1,
163 .periods_max = 98,
164 .buffer_bytes_max = 62720 * 8,
165};
166
167/*
168 * audio pcm capture open callback
169 */
170static int snd_tm6000_pcm_open(struct snd_pcm_substream *substream)
171{
172 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
173 struct snd_pcm_runtime *runtime = substream->runtime;
174 int err;
175
176 err = snd_pcm_hw_constraint_pow2(runtime, 0,
177 SNDRV_PCM_HW_PARAM_PERIODS);
178 if (err < 0)
179 goto _error;
180
181 chip->substream = substream;
182
183 runtime->hw = snd_tm6000_digital_hw;
184
185 return 0;
186_error:
187 dprintk(1, "Error opening PCM!\n");
188 return err;
189}
190
191/*
192 * audio close callback
193 */
194static int snd_tm6000_close(struct snd_pcm_substream *substream)
195{
196 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
197 struct tm6000_core *core = chip->core;
198
199 if (atomic_read(&core->stream_started) > 0) {
200 atomic_set(&core->stream_started, 0);
201 schedule_work(&core->wq_trigger);
202 }
203
204 return 0;
205}
206
207static int tm6000_fillbuf(struct tm6000_core *core, char *buf, int size)
208{
209 struct snd_tm6000_card *chip = core->adev;
210 struct snd_pcm_substream *substream = chip->substream;
211 struct snd_pcm_runtime *runtime;
212 int period_elapsed = 0;
213 unsigned int stride, buf_pos;
214 int length;
215
216 if (atomic_read(&core->stream_started) == 0)
217 return 0;
218
219 if (!size || !substream) {
220 dprintk(1, "substream was NULL\n");
221 return -EINVAL;
222 }
223
224 runtime = substream->runtime;
225 if (!runtime || !runtime->dma_area) {
226 dprintk(1, "runtime was NULL\n");
227 return -EINVAL;
228 }
229
230 buf_pos = chip->buf_pos;
231 stride = runtime->frame_bits >> 3;
232
233 if (stride == 0) {
234 dprintk(1, "stride is zero\n");
235 return -EINVAL;
236 }
237
238 length = size / stride;
239 if (length == 0) {
240 dprintk(1, "%s: length was zero\n", __func__);
241 return -EINVAL;
242 }
243
244 dprintk(1, "Copying %d bytes at %p[%d] - buf size=%d x %d\n", size,
245 runtime->dma_area, buf_pos,
246 (unsigned int)runtime->buffer_size, stride);
247
248 if (buf_pos + length >= runtime->buffer_size) {
249 unsigned int cnt = runtime->buffer_size - buf_pos;
250 memcpy(runtime->dma_area + buf_pos * stride, buf, cnt * stride);
251 memcpy(runtime->dma_area, buf + cnt * stride,
252 length * stride - cnt * stride);
253 } else
254 memcpy(runtime->dma_area + buf_pos * stride, buf,
255 length * stride);
256
257 snd_pcm_stream_lock(substream);
258
259 chip->buf_pos += length;
260 if (chip->buf_pos >= runtime->buffer_size)
261 chip->buf_pos -= runtime->buffer_size;
262
263 chip->period_pos += length;
264 if (chip->period_pos >= runtime->period_size) {
265 chip->period_pos -= runtime->period_size;
266 period_elapsed = 1;
267 }
268
269 snd_pcm_stream_unlock(substream);
270
271 if (period_elapsed)
272 snd_pcm_period_elapsed(substream);
273
274 return 0;
275}
276
277/*
278 * hw_params callback
279 */
280static int snd_tm6000_hw_params(struct snd_pcm_substream *substream,
281 struct snd_pcm_hw_params *hw_params)
282{
283 int size, rc;
284
285 size = params_period_bytes(hw_params) * params_periods(hw_params);
286
287 rc = dsp_buffer_alloc(substream, size);
288 if (rc < 0)
289 return rc;
290
291 return 0;
292}
293
294/*
295 * hw free callback
296 */
297static int snd_tm6000_hw_free(struct snd_pcm_substream *substream)
298{
299 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
300 struct tm6000_core *core = chip->core;
301
302 if (atomic_read(&core->stream_started) > 0) {
303 atomic_set(&core->stream_started, 0);
304 schedule_work(&core->wq_trigger);
305 }
306
307 return 0;
308}
309
310/*
311 * prepare callback
312 */
313static int snd_tm6000_prepare(struct snd_pcm_substream *substream)
314{
315 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
316
317 chip->buf_pos = 0;
318 chip->period_pos = 0;
319
320 return 0;
321}
322
323
324/*
325 * trigger callback
326 */
327static void audio_trigger(struct work_struct *work)
328{
329 struct tm6000_core *core = container_of(work, struct tm6000_core,
330 wq_trigger);
331 struct snd_tm6000_card *chip = core->adev;
332
333 if (atomic_read(&core->stream_started)) {
334 dprintk(1, "starting capture");
335 _tm6000_start_audio_dma(chip);
336 } else {
337 dprintk(1, "stopping capture");
338 _tm6000_stop_audio_dma(chip);
339 }
340}
341
342static int snd_tm6000_card_trigger(struct snd_pcm_substream *substream, int cmd)
343{
344 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
345 struct tm6000_core *core = chip->core;
346 int err = 0;
347
348 switch (cmd) {
349 case SNDRV_PCM_TRIGGER_START:
350 atomic_set(&core->stream_started, 1);
351 break;
352 case SNDRV_PCM_TRIGGER_STOP:
353 atomic_set(&core->stream_started, 0);
354 break;
355 default:
356 err = -EINVAL;
357 break;
358 }
359 schedule_work(&core->wq_trigger);
360
361 return err;
362}
363/*
364 * pointer callback
365 */
366static snd_pcm_uframes_t snd_tm6000_pointer(struct snd_pcm_substream *substream)
367{
368 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
369
370 return chip->buf_pos;
371}
372
373/*
374 * operators
375 */
376static struct snd_pcm_ops snd_tm6000_pcm_ops = {
377 .open = snd_tm6000_pcm_open,
378 .close = snd_tm6000_close,
379 .ioctl = snd_pcm_lib_ioctl,
380 .hw_params = snd_tm6000_hw_params,
381 .hw_free = snd_tm6000_hw_free,
382 .prepare = snd_tm6000_prepare,
383 .trigger = snd_tm6000_card_trigger,
384 .pointer = snd_tm6000_pointer,
385};
386
387/*
388 * create a PCM device
389 */
390
391/* FIXME: Control interface - How to control volume/mute? */
392
393/****************************************************************************
394 Basic Flow for Sound Devices
395 ****************************************************************************/
396
397/*
398 * Alsa Constructor - Component probe
399 */
400int tm6000_audio_init(struct tm6000_core *dev)
401{
402 struct snd_card *card;
403 struct snd_tm6000_card *chip;
404 int rc;
405 static int devnr;
406 char component[14];
407 struct snd_pcm *pcm;
408
409 if (!dev)
410 return 0;
411
412 if (devnr >= SNDRV_CARDS)
413 return -ENODEV;
414
415 if (!enable[devnr])
416 return -ENOENT;
417
418 rc = snd_card_create(index[devnr], "tm6000", THIS_MODULE, 0, &card);
419 if (rc < 0) {
420 snd_printk(KERN_ERR "cannot create card instance %d\n", devnr);
421 return rc;
422 }
423 strcpy(card->driver, "tm6000-alsa");
424 strcpy(card->shortname, "TM5600/60x0");
425 sprintf(card->longname, "TM5600/60x0 Audio at bus %d device %d",
426 dev->udev->bus->busnum, dev->udev->devnum);
427
428 sprintf(component, "USB%04x:%04x",
429 le16_to_cpu(dev->udev->descriptor.idVendor),
430 le16_to_cpu(dev->udev->descriptor.idProduct));
431 snd_component_add(card, component);
432 snd_card_set_dev(card, &dev->udev->dev);
433
434 chip = kzalloc(sizeof(struct snd_tm6000_card), GFP_KERNEL);
435 if (!chip) {
436 rc = -ENOMEM;
437 goto error;
438 }
439
440 chip->core = dev;
441 chip->card = card;
442 dev->adev = chip;
443 spin_lock_init(&chip->reg_lock);
444
445 rc = snd_pcm_new(card, "TM6000 Audio", 0, 0, 1, &pcm);
446 if (rc < 0)
447 goto error_chip;
448
449 pcm->info_flags = 0;
450 pcm->private_data = chip;
451 strcpy(pcm->name, "Trident TM5600/60x0");
452
453 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_tm6000_pcm_ops);
454
455 INIT_WORK(&dev->wq_trigger, audio_trigger);
456 rc = snd_card_register(card);
457 if (rc < 0)
458 goto error_chip;
459
460 dprintk(1, "Registered audio driver for %s\n", card->longname);
461
462 return 0;
463
464error_chip:
465 kfree(chip);
466 dev->adev = NULL;
467error:
468 snd_card_free(card);
469 return rc;
470}
471
472static int tm6000_audio_fini(struct tm6000_core *dev)
473{
474 struct snd_tm6000_card *chip = dev->adev;
475
476 if (!dev)
477 return 0;
478
479 if (!chip)
480 return 0;
481
482 if (!chip->card)
483 return 0;
484
485 snd_card_free(chip->card);
486 chip->card = NULL;
487 kfree(chip);
488 dev->adev = NULL;
489
490 return 0;
491}
492
493struct tm6000_ops audio_ops = {
494 .type = TM6000_AUDIO,
495 .name = "TM6000 Audio Extension",
496 .init = tm6000_audio_init,
497 .fini = tm6000_audio_fini,
498 .fillbuf = tm6000_fillbuf,
499};
500
501static int __init tm6000_alsa_register(void)
502{
503 return tm6000_register_extension(&audio_ops);
504}
505
506static void __exit tm6000_alsa_unregister(void)
507{
508 tm6000_unregister_extension(&audio_ops);
509}
510
511module_init(tm6000_alsa_register);
512module_exit(tm6000_alsa_unregister);