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 const 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 const 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 const 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                 goto free_pcm;
 145
 146         err = snd_pcm_hw_constraint_minmax(runtime,
 147                                            SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 148                                            1024, UINT_MAX);
 149         if (err < 0)
 150                 goto free_pcm;
 151
 152         apcm->timer = ct_timer_instance_new(atc->timer, apcm);
 153         if (!apcm->timer) {
 154                 err = -ENOMEM;
 155                 goto free_pcm;
 156         }
 157         runtime->private_data = apcm;
 158         runtime->private_free = ct_atc_pcm_free_substream;
 159
 160         return 0;
 161
 162 free_pcm:
 163         kfree(apcm);
 164         return err;
 165 }
 166
 167 static int ct_pcm_playback_close(struct snd_pcm_substream *substream)
 168 {
 169         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 170
 171         /* TODO: Notify mixer inactive. */
 172         if (IEC958 == substream->pcm->device)
 173                 atc->spdif_out_passthru(atc, 0);
 174
 175         /* The ct_atc_pcm object will be freed by runtime->private_free */
 176
 177         return 0;
 178 }
 179
 180 static int ct_pcm_hw_params(struct snd_pcm_substream *substream,
 181                                      struct snd_pcm_hw_params *hw_params)
 182 {
 183         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 184         struct ct_atc_pcm *apcm = substream->runtime->private_data;
 185         int err;
 186
 187         err = snd_pcm_lib_malloc_pages(substream,
 188                                         params_buffer_bytes(hw_params));
 189         if (err < 0)
 190                 return err;
 191         /* clear previous resources */
 192         atc->pcm_release_resources(atc, apcm);
 193         return err;
 194 }
 195
 196 static int ct_pcm_hw_free(struct snd_pcm_substream *substream)
 197 {
 198         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 199         struct ct_atc_pcm *apcm = substream->runtime->private_data;
 200
 201         /* clear previous resources */
 202         atc->pcm_release_resources(atc, apcm);
 203         /* Free snd-allocated pages */
 204         return snd_pcm_lib_free_pages(substream);
 205 }
 206
 207
 208 static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream)
 209 {
 210         int err;
 211         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 212         struct snd_pcm_runtime *runtime = substream->runtime;
 213         struct ct_atc_pcm *apcm = runtime->private_data;
 214
 215         if (IEC958 == substream->pcm->device)
 216                 err = atc->spdif_passthru_playback_prepare(atc, apcm);
 217         else
 218                 err = atc->pcm_playback_prepare(atc, apcm);
 219
 220         if (err < 0) {
 221                 dev_err(atc->card->dev,
 222                         "Preparing pcm playback failed!!!\n");
 223                 return err;
 224         }
 225
 226         return 0;
 227 }
 228
 229 static int
 230 ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 231 {
 232         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 233         struct snd_pcm_runtime *runtime = substream->runtime;
 234         struct ct_atc_pcm *apcm = runtime->private_data;
 235
 236         switch (cmd) {
 237         case SNDRV_PCM_TRIGGER_START:
 238         case SNDRV_PCM_TRIGGER_RESUME:
 239         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 240                 atc->pcm_playback_start(atc, apcm);
 241                 break;
 242         case SNDRV_PCM_TRIGGER_STOP:
 243         case SNDRV_PCM_TRIGGER_SUSPEND:
 244         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 245                 atc->pcm_playback_stop(atc, apcm);
 246                 break;
 247         default:
 248                 break;
 249         }
 250
 251         return 0;
 252 }
 253
 254 static snd_pcm_uframes_t
 255 ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
 256 {
 257         unsigned long position;
 258         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 259         struct snd_pcm_runtime *runtime = substream->runtime;
 260         struct ct_atc_pcm *apcm = runtime->private_data;
 261
 262         /* Read out playback position */
 263         position = atc->pcm_playback_position(atc, apcm);
 264         position = bytes_to_frames(runtime, position);
 265         if (position >= runtime->buffer_size)
 266                 position = 0;
 267         return position;
 268 }
 269
 270 /* pcm capture operations */
 271 static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
 272 {
 273         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 274         struct snd_pcm_runtime *runtime = substream->runtime;
 275         struct ct_atc_pcm *apcm;
 276         int err;
 277
 278         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
 279         if (!apcm)
 280                 return -ENOMEM;
 281
 282         apcm->started = 0;
 283         apcm->substream = substream;
 284         apcm->interrupt = ct_atc_pcm_interrupt;
 285         runtime->hw = ct_pcm_capture_hw;
 286         runtime->hw.rate_max = atc->rsr * atc->msr;
 287
 288         err = snd_pcm_hw_constraint_integer(runtime,
 289                                             SNDRV_PCM_HW_PARAM_PERIODS);
 290         if (err < 0)
 291                 goto free_pcm;
 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                 goto free_pcm;
 298
 299         apcm->timer = ct_timer_instance_new(atc->timer, apcm);
 300         if (!apcm->timer) {
 301                 err = -ENOMEM;
 302                 goto free_pcm;
 303         }
 304         runtime->private_data = apcm;
 305         runtime->private_free = ct_atc_pcm_free_substream;
 306
 307         return 0;
 308
 309 free_pcm:
 310         kfree(apcm);
 311         return err;
 312 }
 313
 314 static int ct_pcm_capture_close(struct snd_pcm_substream *substream)
 315 {
 316         /* The ct_atc_pcm object will be freed by runtime->private_free */
 317         /* TODO: Notify mixer inactive. */
 318         return 0;
 319 }
 320
 321 static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream)
 322 {
 323         int err;
 324         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 325         struct snd_pcm_runtime *runtime = substream->runtime;
 326         struct ct_atc_pcm *apcm = runtime->private_data;
 327
 328         err = atc->pcm_capture_prepare(atc, apcm);
 329         if (err < 0) {
 330                 dev_err(atc->card->dev,
 331                         "Preparing pcm capture failed!!!\n");
 332                 return err;
 333         }
 334
 335         return 0;
 336 }
 337
 338 static int
 339 ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 340 {
 341         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 342         struct snd_pcm_runtime *runtime = substream->runtime;
 343         struct ct_atc_pcm *apcm = runtime->private_data;
 344
 345         switch (cmd) {
 346         case SNDRV_PCM_TRIGGER_START:
 347                 atc->pcm_capture_start(atc, apcm);
 348                 break;
 349         case SNDRV_PCM_TRIGGER_STOP:
 350                 atc->pcm_capture_stop(atc, apcm);
 351                 break;
 352         default:
 353                 atc->pcm_capture_stop(atc, apcm);
 354                 break;
 355         }
 356
 357         return 0;
 358 }
 359
 360 static snd_pcm_uframes_t
 361 ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
 362 {
 363         unsigned long position;
 364         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 365         struct snd_pcm_runtime *runtime = substream->runtime;
 366         struct ct_atc_pcm *apcm = runtime->private_data;
 367
 368         /* Read out playback position */
 369         position = atc->pcm_capture_position(atc, apcm);
 370         position = bytes_to_frames(runtime, position);
 371         if (position >= runtime->buffer_size)
 372                 position = 0;
 373         return position;
 374 }
 375
 376 /* PCM operators for playback */
 377 static const struct snd_pcm_ops ct_pcm_playback_ops = {
 378         .open           = ct_pcm_playback_open,
 379         .close          = ct_pcm_playback_close,
 380         .ioctl          = snd_pcm_lib_ioctl,
 381         .hw_params      = ct_pcm_hw_params,
 382         .hw_free        = ct_pcm_hw_free,
 383         .prepare        = ct_pcm_playback_prepare,
 384         .trigger        = ct_pcm_playback_trigger,
 385         .pointer        = ct_pcm_playback_pointer,
 386         .page           = snd_pcm_sgbuf_ops_page,
 387 };
 388
 389 /* PCM operators for capture */
 390 static const struct snd_pcm_ops ct_pcm_capture_ops = {
 391         .open           = ct_pcm_capture_open,
 392         .close          = ct_pcm_capture_close,
 393         .ioctl          = snd_pcm_lib_ioctl,
 394         .hw_params      = ct_pcm_hw_params,
 395         .hw_free        = ct_pcm_hw_free,
 396         .prepare        = ct_pcm_capture_prepare,
 397         .trigger        = ct_pcm_capture_trigger,
 398         .pointer        = ct_pcm_capture_pointer,
 399         .page           = snd_pcm_sgbuf_ops_page,
 400 };
 401
 402 static const struct snd_pcm_chmap_elem surround_map[] = {
 403         { .channels = 1,
 404           .map = { SNDRV_CHMAP_MONO } },
 405         { .channels = 2,
 406           .map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
 407         { }
 408 };
 409
 410 static const struct snd_pcm_chmap_elem clfe_map[] = {
 411         { .channels = 1,
 412           .map = { SNDRV_CHMAP_MONO } },
 413         { .channels = 2,
 414           .map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
 415         { }
 416 };
 417
 418 static const struct snd_pcm_chmap_elem side_map[] = {
 419         { .channels = 1,
 420           .map = { SNDRV_CHMAP_MONO } },
 421         { .channels = 2,
 422           .map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
 423         { }
 424 };
 425
 426 /* Create ALSA pcm device */
 427 int ct_alsa_pcm_create(struct ct_atc *atc,
 428                        enum CTALSADEVS device,
 429                        const char *device_name)
 430 {
 431         struct snd_pcm *pcm;
 432         const struct snd_pcm_chmap_elem *map;
 433         int chs;
 434         int err;
 435         int playback_count, capture_count;
 436
 437         playback_count = (IEC958 == device) ? 1 : 256;
 438         capture_count = (FRONT == device) ? 1 : 0;
 439         err = snd_pcm_new(atc->card, "ctxfi", device,
 440                           playback_count, capture_count, &pcm);
 441         if (err < 0) {
 442                 dev_err(atc->card->dev, "snd_pcm_new failed!! Err=%d\n",
 443                         err);
 444                 return err;
 445         }
 446
 447         pcm->private_data = atc;
 448         pcm->info_flags = 0;
 449         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
 450         strlcpy(pcm->name, device_name, sizeof(pcm->name));
 451
 452         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);
 453
 454         if (FRONT == device)
 455                 snd_pcm_set_ops(pcm,
 456                                 SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
 457
 458         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 459                         snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
 460
 461         chs = 2;
 462         switch (device) {
 463         case FRONT:
 464                 chs = 8;
 465                 map = snd_pcm_std_chmaps;
 466                 break;
 467         case SURROUND:
 468                 map = surround_map;
 469                 break;
 470         case CLFE:
 471                 map = clfe_map;
 472                 break;
 473         case SIDE:
 474                 map = side_map;
 475                 break;
 476         default:
 477                 map = snd_pcm_std_chmaps;
 478                 break;
 479         }
 480         err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, chs,
 481                                      0, NULL);
 482         if (err < 0)
 483                 return err;
 484
 485 #ifdef CONFIG_PM_SLEEP
 486         atc->pcms[device] = pcm;
 487 #endif
 488
 489         return 0;
 490 }