drivers/staging/tm6000/tm6000-alsa.c

   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 <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>
  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 int 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         int val;
  80
  81         dprintk(1, "Starting audio DMA\n");
  82
  83         /* Enables audio */
  84         val = tm6000_get_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, 0x0);
  85         val |= 0x20;
  86         tm6000_set_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, val);
  87
  88         tm6000_set_audio_bitrate(core, 48000);
  89
  90         tm6000_set_reg(core, TM6010_REQ08_R01_A_INIT, 0x80);
  91
  92         return 0;
  93 }
  94
  95 /*
  96  * BOARD Specific: Resets audio DMA
  97  */
  98 static int _tm6000_stop_audio_dma(struct snd_tm6000_card *chip)
  99 {
 100         struct tm6000_core *core = chip->core;
 101         int val;
 102         dprintk(1, "Stopping audio DMA\n");
 103
 104         /* Enables audio */
 105         val = tm6000_get_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, 0x0);
 106         val &= ~0x20;
 107         tm6000_set_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, val);
 108
 109         tm6000_set_reg(core, TM6010_REQ08_R01_A_INIT, 0);
 110
 111         return 0;
 112 }
 113
 114 static void dsp_buffer_free(struct snd_pcm_substream *substream)
 115 {
 116         struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
 117
 118         dprintk(2, "Freeing buffer\n");
 119
 120         vfree(substream->runtime->dma_area);
 121         substream->runtime->dma_area = NULL;
 122         substream->runtime->dma_bytes = 0;
 123 }
 124
 125 static int dsp_buffer_alloc(struct snd_pcm_substream *substream, int size)
 126 {
 127         struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
 128
 129         dprintk(2, "Allocating buffer\n");
 130
 131         if (substream->runtime->dma_area) {
 132                 if (substream->runtime->dma_bytes > size)
 133                         return 0;
 134                 dsp_buffer_free(substream);
 135         }
 136
 137         substream->runtime->dma_area = vmalloc(size);
 138         if (!substream->runtime->dma_area)
 139                 return -ENOMEM;
 140
 141         substream->runtime->dma_bytes = size;
 142
 143         return 0;
 144 }
 145
 146
 147 /****************************************************************************
 148                                 ALSA PCM Interface
 149  ****************************************************************************/
 150
 151 /*
 152  * Digital hardware definition
 153  */
 154 #define DEFAULT_FIFO_SIZE       4096
 155
 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,
 162
 163         .rates =                SNDRV_PCM_RATE_48000,
 164         .rate_min =             48000,
 165         .rate_max =             48000,
 166         .channels_min = 2,
 167         .channels_max = 2,
 168         .period_bytes_min = 62720,
 169         .period_bytes_max = 62720,
 170         .periods_min = 1,
 171         .periods_max = 1024,
 172         .buffer_bytes_max = 62720 * 8,
 173 };
 174
 175 /*
 176  * audio pcm capture open callback
 177  */
 178 static int snd_tm6000_pcm_open(struct snd_pcm_substream *substream)
 179 {
 180         struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
 181         struct snd_pcm_runtime *runtime = substream->runtime;
 182         int err;
 183
 184         err = snd_pcm_hw_constraint_pow2(runtime, 0,
 185                                          SNDRV_PCM_HW_PARAM_PERIODS);
 186         if (err < 0)
 187                 goto _error;
 188
 189         chip->substream = substream;
 190
 191         runtime->hw = snd_tm6000_digital_hw;
 192
 193         return 0;
 194 _error:
 195         dprintk(1, "Error opening PCM!\n");
 196         return err;
 197 }
 198
 199 /*
 200  * audio close callback
 201  */
 202 static int snd_tm6000_close(struct snd_pcm_substream *substream)
 203 {
 204         return 0;
 205 }
 206
 207 static 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
 215         if (!size || !substream)
 216                 return -EINVAL;
 217
 218         runtime = substream->runtime;
 219         if (!runtime || !runtime->dma_area)
 220                 return -EINVAL;
 221
 222         buf_pos = chip->buf_pos;
 223         stride = runtime->frame_bits >> 3;
 224
 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);
 228
 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);
 233         } else
 234                 memcpy(runtime->dma_area + buf_pos, buf, size);
 235
 236         chip->buf_pos += size;
 237         if (chip->buf_pos >= runtime->buffer_size * stride)
 238                 chip->buf_pos -= runtime->buffer_size * stride;
 239
 240         chip->period_pos += size;
 241         if (chip->period_pos >= runtime->period_size) {
 242                 chip->period_pos -= runtime->period_size;
 243                 period_elapsed = 1;
 244         }
 245
 246         if (period_elapsed)
 247                 snd_pcm_period_elapsed(substream);
 248
 249         return 0;
 250 }
 251
 252 /*
 253  * hw_params callback
 254  */
 255 static int snd_tm6000_hw_params(struct snd_pcm_substream *substream,
 256                               struct snd_pcm_hw_params *hw_params)
 257 {
 258         int size, rc;
 259
 260         size = params_period_bytes(hw_params) * params_periods(hw_params);
 261
 262         rc = dsp_buffer_alloc(substream, size);
 263         if (rc < 0)
 264                 return rc;
 265
 266         return 0;
 267 }
 268
 269 /*
 270  * hw free callback
 271  */
 272 static int snd_tm6000_hw_free(struct snd_pcm_substream *substream)
 273 {
 274         struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
 275
 276         _tm6000_stop_audio_dma(chip);
 277
 278         return 0;
 279 }
 280
 281 /*
 282  * prepare callback
 283  */
 284 static int snd_tm6000_prepare(struct snd_pcm_substream *substream)
 285 {
 286         struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
 287
 288         chip->buf_pos = 0;
 289         chip->period_pos = 0;
 290
 291         return 0;
 292 }
 293
 294
 295 /*
 296  * trigger callback
 297  */
 298 static int snd_tm6000_card_trigger(struct snd_pcm_substream *substream, int cmd)
 299 {
 300         struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
 301         int err;
 302
 303         spin_lock(&chip->reg_lock);
 304
 305         switch (cmd) {
 306         case SNDRV_PCM_TRIGGER_START:
 307                 err = _tm6000_start_audio_dma(chip);
 308                 break;
 309         case SNDRV_PCM_TRIGGER_STOP:
 310                 err = _tm6000_stop_audio_dma(chip);
 311                 break;
 312         default:
 313                 err = -EINVAL;
 314                 break;
 315         }
 316
 317         spin_unlock(&chip->reg_lock);
 318
 319         return err;
 320 }
 321
 322 /*
 323  * pointer callback
 324  */
 325 static snd_pcm_uframes_t snd_tm6000_pointer(struct snd_pcm_substream *substream)
 326 {
 327         struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
 328
 329         return chip->buf_pos;
 330 }
 331
 332 /*
 333  * operators
 334  */
 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,
 344 };
 345
 346 /*
 347  * create a PCM device
 348  */
 349
 350 /* FIXME: Control interface - How to control volume/mute? */
 351
 352 /****************************************************************************
 353                         Basic Flow for Sound Devices
 354  ****************************************************************************/
 355
 356 /*
 357  * Alsa Constructor - Component probe
 358  */
 359 int tm6000_audio_init(struct tm6000_core *dev)
 360 {
 361         struct snd_card         *card;
 362         struct snd_tm6000_card  *chip;
 363         int                     rc;
 364         static int              devnr;
 365         char                    component[14];
 366         struct snd_pcm          *pcm;
 367
 368         if (!dev)
 369                 return 0;
 370
 371         if (devnr >= SNDRV_CARDS)
 372                 return -ENODEV;
 373
 374         if (!enable[devnr])
 375                 return -ENOENT;
 376
 377         rc = snd_card_create(index[devnr], "tm6000", THIS_MODULE, 0, &card);
 378         if (rc < 0) {
 379                 snd_printk(KERN_ERR "cannot create card instance %d\n", devnr);
 380                 return rc;
 381         }
 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);
 386
 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);
 392
 393         chip = kzalloc(sizeof(struct snd_tm6000_card), GFP_KERNEL);
 394         if (!chip) {
 395                 rc = -ENOMEM;
 396                 goto error;
 397         }
 398
 399         chip->core = dev;
 400         chip->card = card;
 401         dev->adev = chip;
 402         spin_lock_init(&chip->reg_lock);
 403
 404         rc = snd_pcm_new(card, "TM6000 Audio", 0, 0, 1, &pcm);
 405         if (rc < 0)
 406                 goto error_chip;
 407
 408         pcm->info_flags = 0;
 409         pcm->private_data = chip;
 410         strcpy(pcm->name, "Trident TM5600/60x0");
 411
 412         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_tm6000_pcm_ops);
 413
 414         rc = snd_card_register(card);
 415         if (rc < 0)
 416                 goto error_chip;
 417
 418         dprintk(1,"Registered audio driver for %s\n", card->longname);
 419
 420         return 0;
 421
 422 error_chip:
 423         kfree(chip);
 424         dev->adev = NULL;
 425 error:
 426         snd_card_free(card);
 427         return rc;
 428 }
 429
 430 static int tm6000_audio_fini(struct tm6000_core *dev)
 431 {
 432         struct snd_tm6000_card  *chip = dev->adev;
 433
 434         if (!dev)
 435                 return 0;
 436
 437         if (!chip)
 438                 return 0;
 439
 440         if (!chip->card)
 441                 return 0;
 442
 443         snd_card_free(chip->card);
 444         chip->card = NULL;
 445         kfree(chip);
 446         dev->adev = NULL;
 447
 448         return 0;
 449 }
 450
 451 struct tm6000_ops audio_ops = {
 452         .type   = TM6000_AUDIO,
 453         .name   = "TM6000 Audio Extension",
 454         .init   = tm6000_audio_init,
 455         .fini   = tm6000_audio_fini,
 456         .fillbuf = tm6000_fillbuf,
 457 };
 458
 459 static int __init tm6000_alsa_register(void)
 460 {
 461         return tm6000_register_extension(&audio_ops);
 462 }
 463
 464 static void __exit tm6000_alsa_unregister(void)
 465 {
 466         tm6000_unregister_extension(&audio_ops);
 467 }
 468
 469 module_init(tm6000_alsa_register);
 470 module_exit(tm6000_alsa_unregister);