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