kernel/sound/pci/ctxfi/ctpcm.c

   1 /**
   2  * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
   3  *
   4  * This source file is released under GPL v2 license (no other versions).
   5  * See the COPYING file included in the main directory of this source
   6  * distribution for the license terms and conditions.
   7  *
   8  * @File        ctpcm.c
   9  *
  10  * @Brief
  11  * This file contains the definition of the pcm device functions.
  12  *
  13  * @Author      Liu Chun
  14  * @Date        Apr 2 2008
  15  *
  16  */
  17
  18 #include "ctpcm.h"
  19 #include "cttimer.h"
  20 #include <linux/slab.h>
  21 #include <sound/pcm.h>
  22
  23 /* Hardware descriptions for playback */
  24 static struct snd_pcm_hardware ct_pcm_playback_hw = {
  25         .info                   = (SNDRV_PCM_INFO_MMAP |
  26                                    SNDRV_PCM_INFO_INTERLEAVED |
  27                                    SNDRV_PCM_INFO_BLOCK_TRANSFER |
  28                                    SNDRV_PCM_INFO_MMAP_VALID |
  29                                    SNDRV_PCM_INFO_PAUSE),
  30         .formats                = (SNDRV_PCM_FMTBIT_U8 |
  31                                    SNDRV_PCM_FMTBIT_S16_LE |
  32                                    SNDRV_PCM_FMTBIT_S24_3LE |
  33                                    SNDRV_PCM_FMTBIT_S32_LE |
  34                                    SNDRV_PCM_FMTBIT_FLOAT_LE),
  35         .rates                  = (SNDRV_PCM_RATE_CONTINUOUS |
  36                                    SNDRV_PCM_RATE_8000_192000),
  37         .rate_min               = 8000,
  38         .rate_max               = 192000,
  39         .channels_min           = 1,
  40         .channels_max           = 2,
  41         .buffer_bytes_max       = (128*1024),
  42         .period_bytes_min       = (64),
  43         .period_bytes_max       = (128*1024),
  44         .periods_min            = 2,
  45         .periods_max            = 1024,
  46         .fifo_size              = 0,
  47 };
  48
  49 static struct snd_pcm_hardware ct_spdif_passthru_playback_hw = {
  50         .info                   = (SNDRV_PCM_INFO_MMAP |
  51                                    SNDRV_PCM_INFO_INTERLEAVED |
  52                                    SNDRV_PCM_INFO_BLOCK_TRANSFER |
  53                                    SNDRV_PCM_INFO_MMAP_VALID |
  54                                    SNDRV_PCM_INFO_PAUSE),
  55         .formats                = SNDRV_PCM_FMTBIT_S16_LE,
  56         .rates                  = (SNDRV_PCM_RATE_48000 |
  57                                    SNDRV_PCM_RATE_44100 |
  58                                    SNDRV_PCM_RATE_32000),
  59         .rate_min               = 32000,
  60         .rate_max               = 48000,
  61         .channels_min           = 2,
  62         .channels_max           = 2,
  63         .buffer_bytes_max       = (128*1024),
  64         .period_bytes_min       = (64),
  65         .period_bytes_max       = (128*1024),
  66         .periods_min            = 2,
  67         .periods_max            = 1024,
  68         .fifo_size              = 0,
  69 };
  70
  71 /* Hardware descriptions for capture */
  72 static struct snd_pcm_hardware ct_pcm_capture_hw = {
  73         .info                   = (SNDRV_PCM_INFO_MMAP |
  74                                    SNDRV_PCM_INFO_INTERLEAVED |
  75                                    SNDRV_PCM_INFO_BLOCK_TRANSFER |
  76                                    SNDRV_PCM_INFO_PAUSE |
  77                                    SNDRV_PCM_INFO_MMAP_VALID),
  78         .formats                = (SNDRV_PCM_FMTBIT_U8 |
  79                                    SNDRV_PCM_FMTBIT_S16_LE |
  80                                    SNDRV_PCM_FMTBIT_S24_3LE |
  81                                    SNDRV_PCM_FMTBIT_S32_LE |
  82                                    SNDRV_PCM_FMTBIT_FLOAT_LE),
  83         .rates                  = (SNDRV_PCM_RATE_CONTINUOUS |
  84                                    SNDRV_PCM_RATE_8000_96000),
  85         .rate_min               = 8000,
  86         .rate_max               = 96000,
  87         .channels_min           = 1,
  88         .channels_max           = 2,
  89         .buffer_bytes_max       = (128*1024),
  90         .period_bytes_min       = (384),
  91         .period_bytes_max       = (64*1024),
  92         .periods_min            = 2,
  93         .periods_max            = 1024,
  94         .fifo_size              = 0,
  95 };
  96
  97 static void ct_atc_pcm_interrupt(struct ct_atc_pcm *atc_pcm)
  98 {
  99         struct ct_atc_pcm *apcm = atc_pcm;
 100
 101         if (!apcm->substream)
 102                 return;
 103
 104         snd_pcm_period_elapsed(apcm->substream);
 105 }
 106
 107 static void ct_atc_pcm_free_substream(struct snd_pcm_runtime *runtime)
 108 {
 109         struct ct_atc_pcm *apcm = runtime->private_data;
 110         struct ct_atc *atc = snd_pcm_substream_chip(apcm->substream);
 111
 112         atc->pcm_release_resources(atc, apcm);
 113         ct_timer_instance_free(apcm->timer);
 114         kfree(apcm);
 115         runtime->private_data = NULL;
 116 }
 117
 118 /* pcm playback operations */
 119 static int ct_pcm_playback_open(struct snd_pcm_substream *substream)
 120 {
 121         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 122         struct snd_pcm_runtime *runtime = substream->runtime;
 123         struct ct_atc_pcm *apcm;
 124         int err;
 125
 126         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
 127         if (!apcm)
 128                 return -ENOMEM;
 129
 130         apcm->substream = substream;
 131         apcm->interrupt = ct_atc_pcm_interrupt;
 132         if (IEC958 == substream->pcm->device) {
 133                 runtime->hw = ct_spdif_passthru_playback_hw;
 134                 atc->spdif_out_passthru(atc, 1);
 135         } else {
 136                 runtime->hw = ct_pcm_playback_hw;
 137                 if (FRONT == substream->pcm->device)
 138                         runtime->hw.channels_max = 8;
 139         }
 140
 141         err = snd_pcm_hw_constraint_integer(runtime,
 142                                             SNDRV_PCM_HW_PARAM_PERIODS);
 143         if (err < 0) {
 144                 kfree(apcm);
 145                 return err;
 146         }
 147         err = snd_pcm_hw_constraint_minmax(runtime,
 148                                            SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 149                                            1024, UINT_MAX);
 150         if (err < 0) {
 151                 kfree(apcm);
 152                 return err;
 153         }
 154
 155         apcm->timer = ct_timer_instance_new(atc->timer, apcm);
 156         if (!apcm->timer) {
 157                 kfree(apcm);
 158                 return -ENOMEM;
 159         }
 160         runtime->private_data = apcm;
 161         runtime->private_free = ct_atc_pcm_free_substream;
 162
 163         return 0;
 164 }
 165
 166 static int ct_pcm_playback_close(struct snd_pcm_substream *substream)
 167 {
 168         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 169
 170         /* TODO: Notify mixer inactive. */
 171         if (IEC958 == substream->pcm->device)
 172                 atc->spdif_out_passthru(atc, 0);
 173
 174         /* The ct_atc_pcm object will be freed by runtime->private_free */
 175
 176         return 0;
 177 }
 178
 179 static int ct_pcm_hw_params(struct snd_pcm_substream *substream,
 180                                      struct snd_pcm_hw_params *hw_params)
 181 {
 182         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 183         struct ct_atc_pcm *apcm = substream->runtime->private_data;
 184         int err;
 185
 186         err = snd_pcm_lib_malloc_pages(substream,
 187                                         params_buffer_bytes(hw_params));
 188         if (err < 0)
 189                 return err;
 190         /* clear previous resources */
 191         atc->pcm_release_resources(atc, apcm);
 192         return err;
 193 }
 194
 195 static int ct_pcm_hw_free(struct snd_pcm_substream *substream)
 196 {
 197         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 198         struct ct_atc_pcm *apcm = substream->runtime->private_data;
 199
 200         /* clear previous resources */
 201         atc->pcm_release_resources(atc, apcm);
 202         /* Free snd-allocated pages */
 203         return snd_pcm_lib_free_pages(substream);
 204 }
 205
 206
 207 static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream)
 208 {
 209         int err;
 210         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 211         struct snd_pcm_runtime *runtime = substream->runtime;
 212         struct ct_atc_pcm *apcm = runtime->private_data;
 213
 214         if (IEC958 == substream->pcm->device)
 215                 err = atc->spdif_passthru_playback_prepare(atc, apcm);
 216         else
 217                 err = atc->pcm_playback_prepare(atc, apcm);
 218
 219         if (err < 0) {
 220                 dev_err(atc->card->dev,
 221                         "Preparing pcm playback failed!!!\n");
 222                 return err;
 223         }
 224
 225         return 0;
 226 }
 227
 228 static int
 229 ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 230 {
 231         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 232         struct snd_pcm_runtime *runtime = substream->runtime;
 233         struct ct_atc_pcm *apcm = runtime->private_data;
 234
 235         switch (cmd) {
 236         case SNDRV_PCM_TRIGGER_START:
 237         case SNDRV_PCM_TRIGGER_RESUME:
 238         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 239                 atc->pcm_playback_start(atc, apcm);
 240                 break;
 241         case SNDRV_PCM_TRIGGER_STOP:
 242         case SNDRV_PCM_TRIGGER_SUSPEND:
 243         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 244                 atc->pcm_playback_stop(atc, apcm);
 245                 break;
 246         default:
 247                 break;
 248         }
 249
 250         return 0;
 251 }
 252
 253 static snd_pcm_uframes_t
 254 ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
 255 {
 256         unsigned long position;
 257         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 258         struct snd_pcm_runtime *runtime = substream->runtime;
 259         struct ct_atc_pcm *apcm = runtime->private_data;
 260
 261         /* Read out playback position */
 262         position = atc->pcm_playback_position(atc, apcm);
 263         position = bytes_to_frames(runtime, position);
 264         if (position >= runtime->buffer_size)
 265                 position = 0;
 266         return position;
 267 }
 268
 269 /* pcm capture operations */
 270 static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
 271 {
 272         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 273         struct snd_pcm_runtime *runtime = substream->runtime;
 274         struct ct_atc_pcm *apcm;
 275         int err;
 276
 277         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
 278         if (!apcm)
 279                 return -ENOMEM;
 280
 281         apcm->started = 0;
 282         apcm->substream = substream;
 283         apcm->interrupt = ct_atc_pcm_interrupt;
 284         runtime->hw = ct_pcm_capture_hw;
 285         runtime->hw.rate_max = atc->rsr * atc->msr;
 286
 287         err = snd_pcm_hw_constraint_integer(runtime,
 288                                             SNDRV_PCM_HW_PARAM_PERIODS);
 289         if (err < 0) {
 290                 kfree(apcm);
 291                 return err;
 292         }
 293         err = snd_pcm_hw_constraint_minmax(runtime,
 294                                            SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 295                                            1024, UINT_MAX);
 296         if (err < 0) {
 297                 kfree(apcm);
 298                 return err;
 299         }
 300
 301         apcm->timer = ct_timer_instance_new(atc->timer, apcm);
 302         if (!apcm->timer) {
 303                 kfree(apcm);
 304                 return -ENOMEM;
 305         }
 306         runtime->private_data = apcm;
 307         runtime->private_free = ct_atc_pcm_free_substream;
 308
 309         return 0;
 310 }
 311
 312 static int ct_pcm_capture_close(struct snd_pcm_substream *substream)
 313 {
 314         /* The ct_atc_pcm object will be freed by runtime->private_free */
 315         /* TODO: Notify mixer inactive. */
 316         return 0;
 317 }
 318
 319 static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream)
 320 {
 321         int err;
 322         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 323         struct snd_pcm_runtime *runtime = substream->runtime;
 324         struct ct_atc_pcm *apcm = runtime->private_data;
 325
 326         err = atc->pcm_capture_prepare(atc, apcm);
 327         if (err < 0) {
 328                 dev_err(atc->card->dev,
 329                         "Preparing pcm capture failed!!!\n");
 330                 return err;
 331         }
 332
 333         return 0;
 334 }
 335
 336 static int
 337 ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 338 {
 339         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 340         struct snd_pcm_runtime *runtime = substream->runtime;
 341         struct ct_atc_pcm *apcm = runtime->private_data;
 342
 343         switch (cmd) {
 344         case SNDRV_PCM_TRIGGER_START:
 345                 atc->pcm_capture_start(atc, apcm);
 346                 break;
 347         case SNDRV_PCM_TRIGGER_STOP:
 348                 atc->pcm_capture_stop(atc, apcm);
 349                 break;
 350         default:
 351                 atc->pcm_capture_stop(atc, apcm);
 352                 break;
 353         }
 354
 355         return 0;
 356 }
 357
 358 static snd_pcm_uframes_t
 359 ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
 360 {
 361         unsigned long position;
 362         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 363         struct snd_pcm_runtime *runtime = substream->runtime;
 364         struct ct_atc_pcm *apcm = runtime->private_data;
 365
 366         /* Read out playback position */
 367         position = atc->pcm_capture_position(atc, apcm);
 368         position = bytes_to_frames(runtime, position);
 369         if (position >= runtime->buffer_size)
 370                 position = 0;
 371         return position;
 372 }
 373
 374 /* PCM operators for playback */
 375 static struct snd_pcm_ops ct_pcm_playback_ops = {
 376         .open           = ct_pcm_playback_open,
 377         .close          = ct_pcm_playback_close,
 378         .ioctl          = snd_pcm_lib_ioctl,
 379         .hw_params      = ct_pcm_hw_params,
 380         .hw_free        = ct_pcm_hw_free,
 381         .prepare        = ct_pcm_playback_prepare,
 382         .trigger        = ct_pcm_playback_trigger,
 383         .pointer        = ct_pcm_playback_pointer,
 384         .page           = snd_pcm_sgbuf_ops_page,
 385 };
 386
 387 /* PCM operators for capture */
 388 static struct snd_pcm_ops ct_pcm_capture_ops = {
 389         .open           = ct_pcm_capture_open,
 390         .close          = ct_pcm_capture_close,
 391         .ioctl          = snd_pcm_lib_ioctl,
 392         .hw_params      = ct_pcm_hw_params,
 393         .hw_free        = ct_pcm_hw_free,
 394         .prepare        = ct_pcm_capture_prepare,
 395         .trigger        = ct_pcm_capture_trigger,
 396         .pointer        = ct_pcm_capture_pointer,
 397         .page           = snd_pcm_sgbuf_ops_page,
 398 };
 399
 400 static const struct snd_pcm_chmap_elem surround_map[] = {
 401         { .channels = 1,
 402           .map = { SNDRV_CHMAP_MONO } },
 403         { .channels = 2,
 404           .map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
 405         { }
 406 };
 407
 408 static const struct snd_pcm_chmap_elem clfe_map[] = {
 409         { .channels = 1,
 410           .map = { SNDRV_CHMAP_MONO } },
 411         { .channels = 2,
 412           .map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
 413         { }
 414 };
 415
 416 static const struct snd_pcm_chmap_elem side_map[] = {
 417         { .channels = 1,
 418           .map = { SNDRV_CHMAP_MONO } },
 419         { .channels = 2,
 420           .map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
 421         { }
 422 };
 423
 424 /* Create ALSA pcm device */
 425 int ct_alsa_pcm_create(struct ct_atc *atc,
 426                        enum CTALSADEVS device,
 427                        const char *device_name)
 428 {
 429         struct snd_pcm *pcm;
 430         const struct snd_pcm_chmap_elem *map;
 431         int chs;
 432         int err;
 433         int playback_count, capture_count;
 434
 435         playback_count = (IEC958 == device) ? 1 : 256;
 436         capture_count = (FRONT == device) ? 1 : 0;
 437         err = snd_pcm_new(atc->card, "ctxfi", device,
 438                           playback_count, capture_count, &pcm);
 439         if (err < 0) {
 440                 dev_err(atc->card->dev, "snd_pcm_new failed!! Err=%d\n",
 441                         err);
 442                 return err;
 443         }
 444
 445         pcm->private_data = atc;
 446         pcm->info_flags = 0;
 447         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
 448         strlcpy(pcm->name, device_name, sizeof(pcm->name));
 449
 450         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);
 451
 452         if (FRONT == device)
 453                 snd_pcm_set_ops(pcm,
 454                                 SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
 455
 456         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 457                         snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
 458
 459         chs = 2;
 460         switch (device) {
 461         case FRONT:
 462                 chs = 8;
 463                 map = snd_pcm_std_chmaps;
 464                 break;
 465         case SURROUND:
 466                 map = surround_map;
 467                 break;
 468         case CLFE:
 469                 map = clfe_map;
 470                 break;
 471         case SIDE:
 472                 map = side_map;
 473                 break;
 474         default:
 475                 map = snd_pcm_std_chmaps;
 476                 break;
 477         }
 478         err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, chs,
 479                                      0, NULL);
 480         if (err < 0)
 481                 return err;
 482
 483 #ifdef CONFIG_PM_SLEEP
 484         atc->pcms[device] = pcm;
 485 #endif
 486
 487         return 0;
 488 }