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         runtime->private_data = apcm;
 133         runtime->private_free = ct_atc_pcm_free_substream;
 134         if (IEC958 == substream->pcm->device) {
 135                 runtime->hw = ct_spdif_passthru_playback_hw;
 136                 atc->spdif_out_passthru(atc, 1);
 137         } else {
 138                 runtime->hw = ct_pcm_playback_hw;
 139                 if (FRONT == substream->pcm->device)
 140                         runtime->hw.channels_max = 8;
 141         }
 142
 143         err = snd_pcm_hw_constraint_integer(runtime,
 144                                             SNDRV_PCM_HW_PARAM_PERIODS);
 145         if (err < 0) {
 146                 kfree(apcm);
 147                 return err;
 148         }
 149         err = snd_pcm_hw_constraint_minmax(runtime,
 150                                            SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 151                                            1024, UINT_MAX);
 152         if (err < 0) {
 153                 kfree(apcm);
 154                 return err;
 155         }
 156
 157         apcm->timer = ct_timer_instance_new(atc->timer, apcm);
 158         if (!apcm->timer)
 159                 return -ENOMEM;
 160
 161         return 0;
 162 }
 163
 164 static int ct_pcm_playback_close(struct snd_pcm_substream *substream)
 165 {
 166         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 167
 168         /* TODO: Notify mixer inactive. */
 169         if (IEC958 == substream->pcm->device)
 170                 atc->spdif_out_passthru(atc, 0);
 171
 172         /* The ct_atc_pcm object will be freed by runtime->private_free */
 173
 174         return 0;
 175 }
 176
 177 static int ct_pcm_hw_params(struct snd_pcm_substream *substream,
 178                                      struct snd_pcm_hw_params *hw_params)
 179 {
 180         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 181         struct ct_atc_pcm *apcm = substream->runtime->private_data;
 182         int err;
 183
 184         err = snd_pcm_lib_malloc_pages(substream,
 185                                         params_buffer_bytes(hw_params));
 186         if (err < 0)
 187                 return err;
 188         /* clear previous resources */
 189         atc->pcm_release_resources(atc, apcm);
 190         return err;
 191 }
 192
 193 static int ct_pcm_hw_free(struct snd_pcm_substream *substream)
 194 {
 195         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 196         struct ct_atc_pcm *apcm = substream->runtime->private_data;
 197
 198         /* clear previous resources */
 199         atc->pcm_release_resources(atc, apcm);
 200         /* Free snd-allocated pages */
 201         return snd_pcm_lib_free_pages(substream);
 202 }
 203
 204
 205 static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream)
 206 {
 207         int err;
 208         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 209         struct snd_pcm_runtime *runtime = substream->runtime;
 210         struct ct_atc_pcm *apcm = runtime->private_data;
 211
 212         if (IEC958 == substream->pcm->device)
 213                 err = atc->spdif_passthru_playback_prepare(atc, apcm);
 214         else
 215                 err = atc->pcm_playback_prepare(atc, apcm);
 216
 217         if (err < 0) {
 218                 printk(KERN_ERR "ctxfi: Preparing pcm playback failed!!!\n");
 219                 return err;
 220         }
 221
 222         return 0;
 223 }
 224
 225 static int
 226 ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 227 {
 228         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 229         struct snd_pcm_runtime *runtime = substream->runtime;
 230         struct ct_atc_pcm *apcm = runtime->private_data;
 231
 232         switch (cmd) {
 233         case SNDRV_PCM_TRIGGER_START:
 234         case SNDRV_PCM_TRIGGER_RESUME:
 235         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 236                 atc->pcm_playback_start(atc, apcm);
 237                 break;
 238         case SNDRV_PCM_TRIGGER_STOP:
 239         case SNDRV_PCM_TRIGGER_SUSPEND:
 240         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 241                 atc->pcm_playback_stop(atc, apcm);
 242                 break;
 243         default:
 244                 break;
 245         }
 246
 247         return 0;
 248 }
 249
 250 static snd_pcm_uframes_t
 251 ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
 252 {
 253         unsigned long position;
 254         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 255         struct snd_pcm_runtime *runtime = substream->runtime;
 256         struct ct_atc_pcm *apcm = runtime->private_data;
 257
 258         /* Read out playback position */
 259         position = atc->pcm_playback_position(atc, apcm);
 260         position = bytes_to_frames(runtime, position);
 261         if (position >= runtime->buffer_size)
 262                 position = 0;
 263         return position;
 264 }
 265
 266 /* pcm capture operations */
 267 static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
 268 {
 269         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 270         struct snd_pcm_runtime *runtime = substream->runtime;
 271         struct ct_atc_pcm *apcm;
 272         int err;
 273
 274         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
 275         if (!apcm)
 276                 return -ENOMEM;
 277
 278         apcm->started = 0;
 279         apcm->substream = substream;
 280         apcm->interrupt = ct_atc_pcm_interrupt;
 281         runtime->private_data = apcm;
 282         runtime->private_free = ct_atc_pcm_free_substream;
 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                 return -ENOMEM;
 303
 304         return 0;
 305 }
 306
 307 static int ct_pcm_capture_close(struct snd_pcm_substream *substream)
 308 {
 309         /* The ct_atc_pcm object will be freed by runtime->private_free */
 310         /* TODO: Notify mixer inactive. */
 311         return 0;
 312 }
 313
 314 static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream)
 315 {
 316         int err;
 317         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 318         struct snd_pcm_runtime *runtime = substream->runtime;
 319         struct ct_atc_pcm *apcm = runtime->private_data;
 320
 321         err = atc->pcm_capture_prepare(atc, apcm);
 322         if (err < 0) {
 323                 printk(KERN_ERR "ctxfi: Preparing pcm capture failed!!!\n");
 324                 return err;
 325         }
 326
 327         return 0;
 328 }
 329
 330 static int
 331 ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 332 {
 333         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 334         struct snd_pcm_runtime *runtime = substream->runtime;
 335         struct ct_atc_pcm *apcm = runtime->private_data;
 336
 337         switch (cmd) {
 338         case SNDRV_PCM_TRIGGER_START:
 339                 atc->pcm_capture_start(atc, apcm);
 340                 break;
 341         case SNDRV_PCM_TRIGGER_STOP:
 342                 atc->pcm_capture_stop(atc, apcm);
 343                 break;
 344         default:
 345                 atc->pcm_capture_stop(atc, apcm);
 346                 break;
 347         }
 348
 349         return 0;
 350 }
 351
 352 static snd_pcm_uframes_t
 353 ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
 354 {
 355         unsigned long position;
 356         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 357         struct snd_pcm_runtime *runtime = substream->runtime;
 358         struct ct_atc_pcm *apcm = runtime->private_data;
 359
 360         /* Read out playback position */
 361         position = atc->pcm_capture_position(atc, apcm);
 362         position = bytes_to_frames(runtime, position);
 363         if (position >= runtime->buffer_size)
 364                 position = 0;
 365         return position;
 366 }
 367
 368 /* PCM operators for playback */
 369 static struct snd_pcm_ops ct_pcm_playback_ops = {
 370         .open           = ct_pcm_playback_open,
 371         .close          = ct_pcm_playback_close,
 372         .ioctl          = snd_pcm_lib_ioctl,
 373         .hw_params      = ct_pcm_hw_params,
 374         .hw_free        = ct_pcm_hw_free,
 375         .prepare        = ct_pcm_playback_prepare,
 376         .trigger        = ct_pcm_playback_trigger,
 377         .pointer        = ct_pcm_playback_pointer,
 378         .page           = snd_pcm_sgbuf_ops_page,
 379 };
 380
 381 /* PCM operators for capture */
 382 static struct snd_pcm_ops ct_pcm_capture_ops = {
 383         .open           = ct_pcm_capture_open,
 384         .close          = ct_pcm_capture_close,
 385         .ioctl          = snd_pcm_lib_ioctl,
 386         .hw_params      = ct_pcm_hw_params,
 387         .hw_free        = ct_pcm_hw_free,
 388         .prepare        = ct_pcm_capture_prepare,
 389         .trigger        = ct_pcm_capture_trigger,
 390         .pointer        = ct_pcm_capture_pointer,
 391         .page           = snd_pcm_sgbuf_ops_page,
 392 };
 393
 394 /* Create ALSA pcm device */
 395 int ct_alsa_pcm_create(struct ct_atc *atc,
 396                        enum CTALSADEVS device,
 397                        const char *device_name)
 398 {
 399         struct snd_pcm *pcm;
 400         int err;
 401         int playback_count, capture_count;
 402
 403         playback_count = (IEC958 == device) ? 1 : 8;
 404         capture_count = (FRONT == device) ? 1 : 0;
 405         err = snd_pcm_new(atc->card, "ctxfi", device,
 406                           playback_count, capture_count, &pcm);
 407         if (err < 0) {
 408                 printk(KERN_ERR "ctxfi: snd_pcm_new failed!! Err=%d\n", err);
 409                 return err;
 410         }
 411
 412         pcm->private_data = atc;
 413         pcm->info_flags = 0;
 414         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
 415         strlcpy(pcm->name, device_name, sizeof(pcm->name));
 416
 417         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);
 418
 419         if (FRONT == device)
 420                 snd_pcm_set_ops(pcm,
 421                                 SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
 422
 423         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 424                         snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
 425
 426 #ifdef CONFIG_PM
 427         atc->pcms[device] = pcm;
 428 #endif
 429
 430         return 0;
 431 }