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 <asm/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;
81 dprintk(1, "Starting audio DMA\n");
84 val = tm6000_get_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, 0x0);
86 tm6000_set_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, val);
88 tm6000_set_audio_bitrate(core, 48000);
90 tm6000_set_reg(core, TM6010_REQ08_R01_A_INIT, 0x80);
96 * BOARD Specific: Resets audio DMA
98 static int _tm6000_stop_audio_dma(struct snd_tm6000_card *chip)
100 struct tm6000_core *core = chip->core;
102 dprintk(1, "Stopping audio DMA\n");
105 val = tm6000_get_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, 0x0);
107 tm6000_set_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, val);
109 tm6000_set_reg(core, TM6010_REQ08_R01_A_INIT, 0);
114 static void dsp_buffer_free(struct snd_pcm_substream *substream)
116 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
118 dprintk(2, "Freeing buffer\n");
120 vfree(substream->runtime->dma_area);
121 substream->runtime->dma_area = NULL;
122 substream->runtime->dma_bytes = 0;
125 static int dsp_buffer_alloc(struct snd_pcm_substream *substream, int size)
127 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
129 dprintk(2, "Allocating buffer\n");
131 if (substream->runtime->dma_area) {
132 if (substream->runtime->dma_bytes > size)
134 dsp_buffer_free(substream);
137 substream->runtime->dma_area = vmalloc(size);
138 if (!substream->runtime->dma_area)
141 substream->runtime->dma_bytes = size;
147 /****************************************************************************
149 ****************************************************************************/
152 * Digital hardware definition
154 #define DEFAULT_FIFO_SIZE 4096
156 static struct snd_pcm_hardware snd_tm6000_digital_hw = {
157 .info = SNDRV_PCM_INFO_MMAP |
158 SNDRV_PCM_INFO_INTERLEAVED |
159 SNDRV_PCM_INFO_BLOCK_TRANSFER |
160 SNDRV_PCM_INFO_MMAP_VALID,
161 .formats = SNDRV_PCM_FMTBIT_S16_LE,
163 .rates = SNDRV_PCM_RATE_48000,
168 .period_bytes_min = 62720,
169 .period_bytes_max = 62720,
172 .buffer_bytes_max = 62720 * 8,
176 * audio pcm capture open callback
178 static int snd_tm6000_pcm_open(struct snd_pcm_substream *substream)
180 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
181 struct snd_pcm_runtime *runtime = substream->runtime;
184 err = snd_pcm_hw_constraint_pow2(runtime, 0,
185 SNDRV_PCM_HW_PARAM_PERIODS);
189 chip->substream = substream;
191 runtime->hw = snd_tm6000_digital_hw;
195 dprintk(1, "Error opening PCM!\n");
200 * audio close callback
202 static int snd_tm6000_close(struct snd_pcm_substream *substream)
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;
215 if (!size || !substream)
218 runtime = substream->runtime;
219 if (!runtime || !runtime->dma_area)
222 buf_pos = chip->buf_pos;
223 stride = runtime->frame_bits >> 3;
225 dprintk(1, "Copying %d bytes at %p[%d] - buf size=%d x %d\n", size,
226 runtime->dma_area, buf_pos,
227 (unsigned int)runtime->buffer_size, stride);
229 if (buf_pos + size >= runtime->buffer_size * stride) {
230 unsigned int cnt = runtime->buffer_size * stride - buf_pos;
231 memcpy(runtime->dma_area + buf_pos, buf, cnt);
232 memcpy(runtime->dma_area, buf + cnt, size - cnt);
234 memcpy(runtime->dma_area + buf_pos, buf, size);
236 chip->buf_pos += size;
237 if (chip->buf_pos >= runtime->buffer_size * stride)
238 chip->buf_pos -= runtime->buffer_size * stride;
240 chip->period_pos += size;
241 if (chip->period_pos >= runtime->period_size) {
242 chip->period_pos -= runtime->period_size;
247 snd_pcm_period_elapsed(substream);
255 static int snd_tm6000_hw_params(struct snd_pcm_substream *substream,
256 struct snd_pcm_hw_params *hw_params)
260 size = params_period_bytes(hw_params) * params_periods(hw_params);
262 rc = dsp_buffer_alloc(substream, size);
272 static int snd_tm6000_hw_free(struct snd_pcm_substream *substream)
274 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
276 _tm6000_stop_audio_dma(chip);
284 static int snd_tm6000_prepare(struct snd_pcm_substream *substream)
286 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
289 chip->period_pos = 0;
298 static int snd_tm6000_card_trigger(struct snd_pcm_substream *substream, int cmd)
300 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
303 spin_lock(&chip->reg_lock);
306 case SNDRV_PCM_TRIGGER_START:
307 err = _tm6000_start_audio_dma(chip);
309 case SNDRV_PCM_TRIGGER_STOP:
310 err = _tm6000_stop_audio_dma(chip);
317 spin_unlock(&chip->reg_lock);
325 static snd_pcm_uframes_t snd_tm6000_pointer(struct snd_pcm_substream *substream)
327 struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
329 return chip->buf_pos;
335 static struct snd_pcm_ops snd_tm6000_pcm_ops = {
336 .open = snd_tm6000_pcm_open,
337 .close = snd_tm6000_close,
338 .ioctl = snd_pcm_lib_ioctl,
339 .hw_params = snd_tm6000_hw_params,
340 .hw_free = snd_tm6000_hw_free,
341 .prepare = snd_tm6000_prepare,
342 .trigger = snd_tm6000_card_trigger,
343 .pointer = snd_tm6000_pointer,
347 * create a PCM device
350 /* FIXME: Control interface - How to control volume/mute? */
352 /****************************************************************************
353 Basic Flow for Sound Devices
354 ****************************************************************************/
357 * Alsa Constructor - Component probe
359 int tm6000_audio_init(struct tm6000_core *dev)
361 struct snd_card *card;
362 struct snd_tm6000_card *chip;
371 if (devnr >= SNDRV_CARDS)
377 rc = snd_card_create(index[devnr], "tm6000", THIS_MODULE, 0, &card);
379 snd_printk(KERN_ERR "cannot create card instance %d\n", devnr);
382 strcpy(card->driver, "tm6000-alsa");
383 strcpy(card->shortname, "TM5600/60x0");
384 sprintf(card->longname, "TM5600/60x0 Audio at bus %d device %d",
385 dev->udev->bus->busnum, dev->udev->devnum);
387 sprintf(component, "USB%04x:%04x",
388 le16_to_cpu(dev->udev->descriptor.idVendor),
389 le16_to_cpu(dev->udev->descriptor.idProduct));
390 snd_component_add(card, component);
391 snd_card_set_dev(card, &dev->udev->dev);
393 chip = kzalloc(sizeof(struct snd_tm6000_card), GFP_KERNEL);
402 spin_lock_init(&chip->reg_lock);
404 rc = snd_pcm_new(card, "TM6000 Audio", 0, 0, 1, &pcm);
409 pcm->private_data = chip;
410 strcpy(pcm->name, "Trident TM5600/60x0");
412 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_tm6000_pcm_ops);
414 rc = snd_card_register(card);
418 dprintk(1,"Registered audio driver for %s\n", card->longname);
427 static int tm6000_audio_fini(struct tm6000_core *dev)
429 struct snd_tm6000_card *chip = dev->adev;
440 snd_card_free(chip->card);
448 struct tm6000_ops audio_ops = {
449 .type = TM6000_AUDIO,
450 .name = "TM6000 Audio Extension",
451 .init = tm6000_audio_init,
452 .fini = tm6000_audio_fini,
453 .fillbuf = tm6000_fillbuf,
456 static int __init tm6000_alsa_register(void)
458 return tm6000_register_extension(&audio_ops);
461 static void __exit tm6000_alsa_unregister(void)
463 tm6000_unregister_extension(&audio_ops);
466 module_init(tm6000_alsa_register);
467 module_exit(tm6000_alsa_unregister);