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 } 436