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                 printk(KERN_ERR "ctxfi: Preparing pcm playback failed!!!\n");
 221                 return err;
 222         }
 223
 224         return 0;
 225 }
 226
 227 static int
 228 ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 229 {
 230         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 231         struct snd_pcm_runtime *runtime = substream->runtime;
 232         struct ct_atc_pcm *apcm = runtime->private_data;
 233
 234         switch (cmd) {
 235         case SNDRV_PCM_TRIGGER_START:
 236         case SNDRV_PCM_TRIGGER_RESUME:
 237         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 238                 atc->pcm_playback_start(atc, apcm);
 239                 break;
 240         case SNDRV_PCM_TRIGGER_STOP:
 241         case SNDRV_PCM_TRIGGER_SUSPEND:
 242         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 243                 atc->pcm_playback_stop(atc, apcm);
 244                 break;
 245         default:
 246                 break;
 247         }
 248
 249         return 0;
 250 }
 251
 252 static snd_pcm_uframes_t
 253 ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
 254 {
 255         unsigned long position;
 256         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 257         struct snd_pcm_runtime *runtime = substream->runtime;
 258         struct ct_atc_pcm *apcm = runtime->private_data;
 259
 260         /* Read out playback position */
 261         position = atc->pcm_playback_position(atc, apcm);
 262         position = bytes_to_frames(runtime, position);
 263         if (position >= runtime->buffer_size)
 264                 position = 0;
 265         return position;
 266 }
 267
 268 /* pcm capture operations */
 269 static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
 270 {
 271         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 272         struct snd_pcm_runtime *runtime = substream->runtime;
 273         struct ct_atc_pcm *apcm;
 274         int err;
 275
 276         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
 277         if (!apcm)
 278                 return -ENOMEM;
 279
 280         apcm->started = 0;
 281         apcm->substream = substream;
 282         apcm->interrupt = ct_atc_pcm_interrupt;
 283         runtime->hw = ct_pcm_capture_hw;
 284         runtime->hw.rate_max = atc->rsr * atc->msr;
 285
 286         err = snd_pcm_hw_constraint_integer(runtime,
 287                                             SNDRV_PCM_HW_PARAM_PERIODS);
 288         if (err < 0) {
 289                 kfree(apcm);
 290                 return err;
 291         }
 292         err = snd_pcm_hw_constraint_minmax(runtime,
 293                                            SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 294                                            1024, UINT_MAX);
 295         if (err < 0) {
 296                 kfree(apcm);
 297                 return err;
 298         }
 299
 300         apcm->timer = ct_timer_instance_new(atc->timer, apcm);
 301         if (!apcm->timer) {
 302                 kfree(apcm);
 303                 return -ENOMEM;
 304         }
 305         runtime->private_data = apcm;
 306         runtime->private_free = ct_atc_pcm_free_substream;
 307
 308         return 0;
 309 }
 310
 311 static int ct_pcm_capture_close(struct snd_pcm_substream *substream)
 312 {
 313         /* The ct_atc_pcm object will be freed by runtime->private_free */
 314         /* TODO: Notify mixer inactive. */
 315         return 0;
 316 }
 317
 318 static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream)
 319 {
 320         int err;
 321         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 322         struct snd_pcm_runtime *runtime = substream->runtime;
 323         struct ct_atc_pcm *apcm = runtime->private_data;
 324
 325         err = atc->pcm_capture_prepare(atc, apcm);
 326         if (err < 0) {
 327                 printk(KERN_ERR "ctxfi: Preparing pcm capture failed!!!\n");
 328                 return err;
 329         }
 330
 331         return 0;
 332 }
 333
 334 static int
 335 ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 336 {
 337         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 338         struct snd_pcm_runtime *runtime = substream->runtime;
 339         struct ct_atc_pcm *apcm = runtime->private_data;
 340
 341         switch (cmd) {
 342         case SNDRV_PCM_TRIGGER_START:
 343                 atc->pcm_capture_start(atc, apcm);
 344                 break;
 345         case SNDRV_PCM_TRIGGER_STOP:
 346                 atc->pcm_capture_stop(atc, apcm);
 347                 break;
 348         default:
 349                 atc->pcm_capture_stop(atc, apcm);
 350                 break;
 351         }
 352
 353         return 0;
 354 }
 355
 356 static snd_pcm_uframes_t
 357 ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
 358 {
 359         unsigned long position;
 360         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 361         struct snd_pcm_runtime *runtime = substream->runtime;
 362         struct ct_atc_pcm *apcm = runtime->private_data;
 363
 364         /* Read out playback position */
 365         position = atc->pcm_capture_position(atc, apcm);
 366         position = bytes_to_frames(runtime, position);
 367         if (position >= runtime->buffer_size)
 368                 position = 0;
 369         return position;
 370 }
 371
 372 /* PCM operators for playback */
 373 static struct snd_pcm_ops ct_pcm_playback_ops = {
 374         .open           = ct_pcm_playback_open,
 375         .close          = ct_pcm_playback_close,
 376         .ioctl          = snd_pcm_lib_ioctl,
 377         .hw_params      = ct_pcm_hw_params,
 378         .hw_free        = ct_pcm_hw_free,
 379         .prepare        = ct_pcm_playback_prepare,
 380         .trigger        = ct_pcm_playback_trigger,
 381         .pointer        = ct_pcm_playback_pointer,
 382         .page           = snd_pcm_sgbuf_ops_page,
 383 };
 384
 385 /* PCM operators for capture */
 386 static struct snd_pcm_ops ct_pcm_capture_ops = {
 387         .open           = ct_pcm_capture_open,
 388         .close          = ct_pcm_capture_close,
 389         .ioctl          = snd_pcm_lib_ioctl,
 390         .hw_params      = ct_pcm_hw_params,
 391         .hw_free        = ct_pcm_hw_free,
 392         .prepare        = ct_pcm_capture_prepare,
 393         .trigger        = ct_pcm_capture_trigger,
 394         .pointer        = ct_pcm_capture_pointer,
 395         .page           = snd_pcm_sgbuf_ops_page,
 396 };
 397
 398 /* Create ALSA pcm device */
 399 int ct_alsa_pcm_create(struct ct_atc *atc,
 400                        enum CTALSADEVS device,
 401                        const char *device_name)
 402 {
 403         struct snd_pcm *pcm;
 404         int err;
 405         int playback_count, capture_count;
 406
 407         playback_count = (IEC958 == device) ? 1 : 8;
 408         capture_count = (FRONT == device) ? 1 : 0;
 409         err = snd_pcm_new(atc->card, "ctxfi", device,
 410                           playback_count, capture_count, &pcm);
 411         if (err < 0) {
 412                 printk(KERN_ERR "ctxfi: snd_pcm_new failed!! Err=%d\n", err);
 413                 return err;
 414         }
 415
 416         pcm->private_data = atc;
 417         pcm->info_flags = 0;
 418         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
 419         strlcpy(pcm->name, device_name, sizeof(pcm->name));
 420
 421         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);
 422
 423         if (FRONT == device)
 424                 snd_pcm_set_ops(pcm,
 425                                 SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
 426
 427         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 428                         snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
 429
 430 #ifdef CONFIG_PM
 431         atc->pcms[device] = pcm;
 432 #endif
 433
 434         return 0;
 435 }