SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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         return snd_pcm_lib_malloc_pages(substream,
 180                                         params_buffer_bytes(hw_params));
 181 }
 182
 183 static int ct_pcm_hw_free(struct snd_pcm_substream *substream)
 184 {
 185         /* Free snd-allocated pages */
 186         return snd_pcm_lib_free_pages(substream);
 187 }
 188
 189
 190 static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream)
 191 {
 192         int err;
 193         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 194         struct snd_pcm_runtime *runtime = substream->runtime;
 195         struct ct_atc_pcm *apcm = runtime->private_data;
 196
 197         if (IEC958 == substream->pcm->device)
 198                 err = atc->spdif_passthru_playback_prepare(atc, apcm);
 199         else
 200                 err = atc->pcm_playback_prepare(atc, apcm);
 201
 202         if (err < 0) {
 203                 printk(KERN_ERR "ctxfi: Preparing pcm playback failed!!!\n");
 204                 return err;
 205         }
 206
 207         return 0;
 208 }
 209
 210 static int
 211 ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 212 {
 213         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 214         struct snd_pcm_runtime *runtime = substream->runtime;
 215         struct ct_atc_pcm *apcm = runtime->private_data;
 216
 217         switch (cmd) {
 218         case SNDRV_PCM_TRIGGER_START:
 219         case SNDRV_PCM_TRIGGER_RESUME:
 220         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 221                 atc->pcm_playback_start(atc, apcm);
 222                 break;
 223         case SNDRV_PCM_TRIGGER_STOP:
 224         case SNDRV_PCM_TRIGGER_SUSPEND:
 225         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 226                 atc->pcm_playback_stop(atc, apcm);
 227                 break;
 228         default:
 229                 break;
 230         }
 231
 232         return 0;
 233 }
 234
 235 static snd_pcm_uframes_t
 236 ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
 237 {
 238         unsigned long position;
 239         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 240         struct snd_pcm_runtime *runtime = substream->runtime;
 241         struct ct_atc_pcm *apcm = runtime->private_data;
 242
 243         /* Read out playback position */
 244         position = atc->pcm_playback_position(atc, apcm);
 245         position = bytes_to_frames(runtime, position);
 246         return position;
 247 }
 248
 249 /* pcm capture operations */
 250 static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
 251 {
 252         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 253         struct snd_pcm_runtime *runtime = substream->runtime;
 254         struct ct_atc_pcm *apcm;
 255         int err;
 256
 257         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
 258         if (NULL == apcm)
 259                 return -ENOMEM;
 260
 261         apcm->started = 0;
 262         apcm->substream = substream;
 263         apcm->interrupt = ct_atc_pcm_interrupt;
 264         runtime->private_data = apcm;
 265         runtime->private_free = ct_atc_pcm_free_substream;
 266         runtime->hw = ct_pcm_capture_hw;
 267         runtime->hw.rate_max = atc->rsr * atc->msr;
 268
 269         err = snd_pcm_hw_constraint_integer(runtime,
 270                                             SNDRV_PCM_HW_PARAM_PERIODS);
 271         if (err < 0) {
 272                 kfree(apcm);
 273                 return err;
 274         }
 275         err = snd_pcm_hw_constraint_minmax(runtime,
 276                                            SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 277                                            1024, UINT_MAX);
 278         if (err < 0) {
 279                 kfree(apcm);
 280                 return err;
 281         }
 282
 283         apcm->timer = ct_timer_instance_new(atc->timer, apcm);
 284         if (!apcm->timer)
 285                 return -ENOMEM;
 286
 287         return 0;
 288 }
 289
 290 static int ct_pcm_capture_close(struct snd_pcm_substream *substream)
 291 {
 292         /* The ct_atc_pcm object will be freed by runtime->private_free */
 293         /* TODO: Notify mixer inactive. */
 294         return 0;
 295 }
 296
 297 static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream)
 298 {
 299         int err;
 300         struct ct_atc *atc = snd_pcm_substream_chip(substream);
 301         struct snd_pcm_runtime *runtime = substream->runtime;
 302         struct ct_atc_pcm *apcm = runtime->private_data;
 303
 304         err = atc->pcm_capture_prepare(atc, apcm);
 305         if (err < 0) {
 306                 printk(KERN_ERR "ctxfi: Preparing pcm capture failed!!!\n");
 307                 return err;
 308         }
 309
 310         return 0;
 311 }
 312
 313 static int
 314 ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 315 {
 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         switch (cmd) {
 321         case SNDRV_PCM_TRIGGER_START:
 322                 atc->pcm_capture_start(atc, apcm);
 323                 break;
 324         case SNDRV_PCM_TRIGGER_STOP:
 325                 atc->pcm_capture_stop(atc, apcm);
 326                 break;
 327         default:
 328                 atc->pcm_capture_stop(atc, apcm);
 329                 break;
 330         }
 331
 332         return 0;
 333 }
 334
 335 static snd_pcm_uframes_t
 336 ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
 337 {
 338         unsigned long position;
 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         /* Read out playback position */
 344         position = atc->pcm_capture_position(atc, apcm);
 345         position = bytes_to_frames(runtime, position);
 346         return position;
 347 }
 348
 349 /* PCM operators for playback */
 350 static struct snd_pcm_ops ct_pcm_playback_ops = {
 351         .open           = ct_pcm_playback_open,
 352         .close          = ct_pcm_playback_close,
 353         .ioctl          = snd_pcm_lib_ioctl,
 354         .hw_params      = ct_pcm_hw_params,
 355         .hw_free        = ct_pcm_hw_free,
 356         .prepare        = ct_pcm_playback_prepare,
 357         .trigger        = ct_pcm_playback_trigger,
 358         .pointer        = ct_pcm_playback_pointer,
 359         .page           = snd_pcm_sgbuf_ops_page,
 360 };
 361
 362 /* PCM operators for capture */
 363 static struct snd_pcm_ops ct_pcm_capture_ops = {
 364         .open           = ct_pcm_capture_open,
 365         .close          = ct_pcm_capture_close,
 366         .ioctl          = snd_pcm_lib_ioctl,
 367         .hw_params      = ct_pcm_hw_params,
 368         .hw_free        = ct_pcm_hw_free,
 369         .prepare        = ct_pcm_capture_prepare,
 370         .trigger        = ct_pcm_capture_trigger,
 371         .pointer        = ct_pcm_capture_pointer,
 372         .page           = snd_pcm_sgbuf_ops_page,
 373 };
 374
 375 /* Create ALSA pcm device */
 376 int ct_alsa_pcm_create(struct ct_atc *atc,
 377                        enum CTALSADEVS device,
 378                        const char *device_name)
 379 {
 380         struct snd_pcm *pcm;
 381         int err;
 382         int playback_count, capture_count;
 383
 384         playback_count = (IEC958 == device) ? 1 : 8;
 385         capture_count = (FRONT == device) ? 1 : 0;
 386         err = snd_pcm_new(atc->card, "ctxfi", device,
 387                           playback_count, capture_count, &pcm);
 388         if (err < 0) {
 389                 printk(KERN_ERR "ctxfi: snd_pcm_new failed!! Err=%d\n", err);
 390                 return err;
 391         }
 392
 393         pcm->private_data = atc;
 394         pcm->info_flags = 0;
 395         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
 396         strlcpy(pcm->name, device_name, sizeof(pcm->name));
 397
 398         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);
 399
 400         if (FRONT == device)
 401                 snd_pcm_set_ops(pcm,
 402                                 SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
 403
 404         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 405                         snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
 406
 407         return 0;
 408 }