3 * Support for audio capture for tm5600/6000/6010
4 * (c) 2007-2008 Mauro Carvalho Chehab <mchehab@redhat.com>
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.
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>
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>
30 #include "tm6000-regs.h"
34 #define dprintk(level, fmt, arg...) do { \
36 printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg); \
39 /****************************************************************************
40 Module global static vars
41 ****************************************************************************/
43 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
45 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
47 module_param_array(enable, bool, NULL, 0444);
48 MODULE_PARM_DESC(enable, "Enable tm6000x soundcard. default enabled.");
50 module_param_array(index, int, NULL, 0444);
51 MODULE_PARM_DESC(index, "Index value for tm6000x capture interface(s).");
54 /****************************************************************************
56 ****************************************************************************/
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},"
64 static unsigned int debug;
65 module_param(debug, int, 0644);
66 MODULE_PARM_DESC(debug, "enable debug messages");
68 /****************************************************************************
69 Module specific funtions
70 ****************************************************************************/
73 * BOARD Specific: Sets audio DMA
76 static int _tm6000_start_audio_dma(struct snd_tm6000_card *chip)
78 struct tm6000_core *core = chip->core;
80 dprintk(1, "Starting audio DMA\n");
83 tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, 0x40, 0x40);
85 tm6000_set_audio_bitrate(core, 48000);
91 * BOARD Specific: Resets audio DMA
93 static int _tm6000_stop_audio_dma(struct snd_tm6000_card *chip)
95 struct tm6000_core *core = chip->core;
97 dprintk(1, "Stopping audio DMA\n");
100 tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, 0x00, 0x40);
105 static void dsp_buffer_free(struct snd_pcm_substream *substream)
107 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
109 dprintk(2, "Freeing buffer\n");
111 vfree(substream->runtime->dma_area);
112 substream->runtime->dma_area = NULL;
113 substream->runtime->dma_bytes = 0;
116 static int dsp_buffer_alloc(struct snd_pcm_substream *substream, int size)
118 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
120 dprintk(2, "Allocating buffer\n");
122 if (substream->runtime->dma_area) {
123 if (substream->runtime->dma_bytes > size)
126 dsp_buffer_free(substream);
129 substream->runtime->dma_area = vmalloc(size);
130 if (!substream->runtime->dma_area)
133 substream->runtime->dma_bytes = size;
139 /****************************************************************************
141 ****************************************************************************/
144 * Digital hardware definition
146 #define DEFAULT_FIFO_SIZE 4096
148 static 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,
155 .rates = SNDRV_PCM_RATE_CONTINUOUS,
160 .period_bytes_min = 64,
161 .period_bytes_max = 12544,
164 .buffer_bytes_max = 62720 * 8,
168 * audio pcm capture open callback
170 static int snd_tm6000_pcm_open(struct snd_pcm_substream *substream)
172 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
173 struct snd_pcm_runtime *runtime = substream->runtime;
176 err = snd_pcm_hw_constraint_pow2(runtime, 0,
177 SNDRV_PCM_HW_PARAM_PERIODS);
181 chip->substream = substream;
183 runtime->hw = snd_tm6000_digital_hw;
187 dprintk(1, "Error opening PCM!\n");
192 * audio close callback
194 static int snd_tm6000_close(struct snd_pcm_substream *substream)
196 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
197 struct tm6000_core *core = chip->core;
199 if (atomic_read(&core->stream_started) > 0) {
200 atomic_set(&core->stream_started, 0);
201 schedule_work(&core->wq_trigger);
207 static int tm6000_fillbuf(struct tm6000_core *core, char *buf, int size)
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;
216 if (atomic_read(&core->stream_started) == 0)
219 if (!size || !substream) {
220 dprintk(1, "substream was NULL\n");
224 runtime = substream->runtime;
225 if (!runtime || !runtime->dma_area) {
226 dprintk(1, "runtime was NULL\n");
230 buf_pos = chip->buf_pos;
231 stride = runtime->frame_bits >> 3;
234 dprintk(1, "stride is zero\n");
238 length = size / stride;
240 dprintk(1, "%s: length was zero\n", __func__);
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);
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);
254 memcpy(runtime->dma_area + buf_pos * stride, buf,
257 snd_pcm_stream_lock(substream);
259 chip->buf_pos += length;
260 if (chip->buf_pos >= runtime->buffer_size)
261 chip->buf_pos -= runtime->buffer_size;
263 chip->period_pos += length;
264 if (chip->period_pos >= runtime->period_size) {
265 chip->period_pos -= runtime->period_size;
269 snd_pcm_stream_unlock(substream);
272 snd_pcm_period_elapsed(substream);
280 static int snd_tm6000_hw_params(struct snd_pcm_substream *substream,
281 struct snd_pcm_hw_params *hw_params)
285 size = params_period_bytes(hw_params) * params_periods(hw_params);
287 rc = dsp_buffer_alloc(substream, size);
297 static int snd_tm6000_hw_free(struct snd_pcm_substream *substream)
299 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
300 struct tm6000_core *core = chip->core;
302 if (atomic_read(&core->stream_started) > 0) {
303 atomic_set(&core->stream_started, 0);
304 schedule_work(&core->wq_trigger);
313 static int snd_tm6000_prepare(struct snd_pcm_substream *substream)
315 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
318 chip->period_pos = 0;
327 static void audio_trigger(struct work_struct *work)
329 struct tm6000_core *core = container_of(work, struct tm6000_core,
331 struct snd_tm6000_card *chip = core->adev;
333 if (atomic_read(&core->stream_started)) {
334 dprintk(1, "starting capture");
335 _tm6000_start_audio_dma(chip);
337 dprintk(1, "stopping capture");
338 _tm6000_stop_audio_dma(chip);
342 static int snd_tm6000_card_trigger(struct snd_pcm_substream *substream, int cmd)
344 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
345 struct tm6000_core *core = chip->core;
349 case SNDRV_PCM_TRIGGER_START:
350 atomic_set(&core->stream_started, 1);
352 case SNDRV_PCM_TRIGGER_STOP:
353 atomic_set(&core->stream_started, 0);
359 schedule_work(&core->wq_trigger);
366 static snd_pcm_uframes_t snd_tm6000_pointer(struct snd_pcm_substream *substream)
368 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
370 return chip->buf_pos;
376 static 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,
388 * create a PCM device
391 /* FIXME: Control interface - How to control volume/mute? */
393 /****************************************************************************
394 Basic Flow for Sound Devices
395 ****************************************************************************/
398 * Alsa Constructor - Component probe
400 int tm6000_audio_init(struct tm6000_core *dev)
402 struct snd_card *card;
403 struct snd_tm6000_card *chip;
412 if (devnr >= SNDRV_CARDS)
418 rc = snd_card_create(index[devnr], "tm6000", THIS_MODULE, 0, &card);
420 snd_printk(KERN_ERR "cannot create card instance %d\n", devnr);
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);
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);
434 chip = kzalloc(sizeof(struct snd_tm6000_card), GFP_KERNEL);
443 spin_lock_init(&chip->reg_lock);
445 rc = snd_pcm_new(card, "TM6000 Audio", 0, 0, 1, &pcm);
450 pcm->private_data = chip;
451 strcpy(pcm->name, "Trident TM5600/60x0");
453 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_tm6000_pcm_ops);
455 INIT_WORK(&dev->wq_trigger, audio_trigger);
456 rc = snd_card_register(card);
460 dprintk(1, "Registered audio driver for %s\n", card->longname);
472 static int tm6000_audio_fini(struct tm6000_core *dev)
474 struct snd_tm6000_card *chip = dev->adev;
485 snd_card_free(chip->card);
493 struct 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,
501 static int __init tm6000_alsa_register(void)
503 return tm6000_register_extension(&audio_ops);
506 static void __exit tm6000_alsa_unregister(void)
508 tm6000_unregister_extension(&audio_ops);
511 module_init(tm6000_alsa_register);
512 module_exit(tm6000_alsa_unregister);