1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * oxfw_pcm.c - a part of driver for OXFW970/971 based devices 4 * 5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de> 6 */ 7 8 #include "oxfw.h" 9 10 static int hw_rule_rate(struct snd_pcm_hw_params *params, 11 struct snd_pcm_hw_rule *rule) 12 { 13 u8 **formats = rule->private; 14 struct snd_interval *r = 15 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 16 const struct snd_interval *c = 17 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); 18 struct snd_interval t = { 19 .min = UINT_MAX, .max = 0, .integer = 1 20 }; 21 struct snd_oxfw_stream_formation formation; 22 int i, err; 23 24 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 25 if (formats[i] == NULL) 26 continue; 27 28 err = snd_oxfw_stream_parse_format(formats[i], &formation); 29 if (err < 0) 30 continue; 31 if (!snd_interval_test(c, formation.pcm)) 32 continue; 33 34 t.min = min(t.min, formation.rate); 35 t.max = max(t.max, formation.rate); 36 37 } 38 return snd_interval_refine(r, &t); 39 } 40 41 static int hw_rule_channels(struct snd_pcm_hw_params *params, 42 struct snd_pcm_hw_rule *rule) 43 { 44 u8 **formats = rule->private; 45 struct snd_interval *c = 46 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 47 const struct snd_interval *r = 48 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); 49 struct snd_oxfw_stream_formation formation; 50 int i, j, err; 51 unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0}; 52 53 count = 0; 54 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 55 if (formats[i] == NULL) 56 break; 57 58 err = snd_oxfw_stream_parse_format(formats[i], &formation); 59 if (err < 0) 60 continue; 61 if (!snd_interval_test(r, formation.rate)) 62 continue; 63 if (list[count] == formation.pcm) 64 continue; 65 66 for (j = 0; j < ARRAY_SIZE(list); j++) { 67 if (list[j] == formation.pcm) 68 break; 69 } 70 if (j == ARRAY_SIZE(list)) { 71 list[count] = formation.pcm; 72 if (++count == ARRAY_SIZE(list)) 73 break; 74 } 75 } 76 77 return snd_interval_list(c, count, list, 0); 78 } 79 80 static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats) 81 { 82 struct snd_oxfw_stream_formation formation; 83 int i, err; 84 85 hw->channels_min = UINT_MAX; 86 hw->channels_max = 0; 87 88 hw->rate_min = UINT_MAX; 89 hw->rate_max = 0; 90 hw->rates = 0; 91 92 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 93 if (formats[i] == NULL) 94 break; 95 96 err = snd_oxfw_stream_parse_format(formats[i], &formation); 97 if (err < 0) 98 continue; 99 100 hw->channels_min = min(hw->channels_min, formation.pcm); 101 hw->channels_max = max(hw->channels_max, formation.pcm); 102 103 hw->rate_min = min(hw->rate_min, formation.rate); 104 hw->rate_max = max(hw->rate_max, formation.rate); 105 hw->rates |= snd_pcm_rate_to_rate_bit(formation.rate); 106 } 107 } 108 109 static int init_hw_params(struct snd_oxfw *oxfw, 110 struct snd_pcm_substream *substream) 111 { 112 struct snd_pcm_runtime *runtime = substream->runtime; 113 u8 **formats; 114 struct amdtp_stream *stream; 115 int err; 116 117 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 118 runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS; 119 stream = &oxfw->tx_stream; 120 formats = oxfw->tx_stream_formats; 121 } else { 122 runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS; 123 stream = &oxfw->rx_stream; 124 formats = oxfw->rx_stream_formats; 125 } 126 127 limit_channels_and_rates(&runtime->hw, formats); 128 129 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 130 hw_rule_channels, formats, 131 SNDRV_PCM_HW_PARAM_RATE, -1); 132 if (err < 0) 133 goto end; 134 135 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 136 hw_rule_rate, formats, 137 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 138 if (err < 0) 139 goto end; 140 141 err = amdtp_am824_add_pcm_hw_constraints(stream, runtime); 142 end: 143 return err; 144 } 145 146 static int limit_to_current_params(struct snd_pcm_substream *substream) 147 { 148 struct snd_oxfw *oxfw = substream->private_data; 149 struct snd_oxfw_stream_formation formation; 150 enum avc_general_plug_dir dir; 151 int err; 152 153 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 154 dir = AVC_GENERAL_PLUG_DIR_OUT; 155 else 156 dir = AVC_GENERAL_PLUG_DIR_IN; 157 158 err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); 159 if (err < 0) 160 goto end; 161 162 substream->runtime->hw.channels_min = formation.pcm; 163 substream->runtime->hw.channels_max = formation.pcm; 164 substream->runtime->hw.rate_min = formation.rate; 165 substream->runtime->hw.rate_max = formation.rate; 166 end: 167 return err; 168 } 169 170 static int pcm_open(struct snd_pcm_substream *substream) 171 { 172 struct snd_oxfw *oxfw = substream->private_data; 173 struct amdtp_domain *d = &oxfw->domain; 174 int err; 175 176 err = snd_oxfw_stream_lock_try(oxfw); 177 if (err < 0) 178 return err; 179 180 err = init_hw_params(oxfw, substream); 181 if (err < 0) 182 goto err_locked; 183 184 mutex_lock(&oxfw->mutex); 185 186 // When source of clock is not internal or any stream is reserved for 187 // transmission of PCM frames, the available sampling rate is limited 188 // at current one. 189 if (oxfw->substreams_count > 0 && d->events_per_period > 0) { 190 unsigned int frames_per_period = d->events_per_period; 191 unsigned int frames_per_buffer = d->events_per_buffer; 192 193 err = limit_to_current_params(substream); 194 if (err < 0) { 195 mutex_unlock(&oxfw->mutex); 196 goto err_locked; 197 } 198 199 if (frames_per_period > 0) { 200 err = snd_pcm_hw_constraint_minmax(substream->runtime, 201 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 202 frames_per_period, frames_per_period); 203 if (err < 0) { 204 mutex_unlock(&oxfw->mutex); 205 goto err_locked; 206 } 207 208 err = snd_pcm_hw_constraint_minmax(substream->runtime, 209 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 210 frames_per_buffer, frames_per_buffer); 211 if (err < 0) { 212 mutex_unlock(&oxfw->mutex); 213 goto err_locked; 214 } 215 } 216 } 217 218 mutex_unlock(&oxfw->mutex); 219 220 snd_pcm_set_sync(substream); 221 222 return 0; 223 err_locked: 224 snd_oxfw_stream_lock_release(oxfw); 225 return err; 226 } 227 228 static int pcm_close(struct snd_pcm_substream *substream) 229 { 230 struct snd_oxfw *oxfw = substream->private_data; 231 232 snd_oxfw_stream_lock_release(oxfw); 233 return 0; 234 } 235 236 static int pcm_capture_hw_params(struct snd_pcm_substream *substream, 237 struct snd_pcm_hw_params *hw_params) 238 { 239 struct snd_oxfw *oxfw = substream->private_data; 240 int err; 241 242 err = snd_pcm_lib_alloc_vmalloc_buffer(substream, 243 params_buffer_bytes(hw_params)); 244 if (err < 0) 245 return err; 246 247 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 248 unsigned int rate = params_rate(hw_params); 249 unsigned int channels = params_channels(hw_params); 250 unsigned int frames_per_period = params_period_size(hw_params); 251 unsigned int frames_per_buffer = params_buffer_size(hw_params); 252 253 mutex_lock(&oxfw->mutex); 254 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream, 255 rate, channels, frames_per_period, 256 frames_per_buffer); 257 if (err >= 0) 258 ++oxfw->substreams_count; 259 mutex_unlock(&oxfw->mutex); 260 } 261 262 return err; 263 } 264 static int pcm_playback_hw_params(struct snd_pcm_substream *substream, 265 struct snd_pcm_hw_params *hw_params) 266 { 267 struct snd_oxfw *oxfw = substream->private_data; 268 int err; 269 270 err = snd_pcm_lib_alloc_vmalloc_buffer(substream, 271 params_buffer_bytes(hw_params)); 272 if (err < 0) 273 return err; 274 275 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 276 unsigned int rate = params_rate(hw_params); 277 unsigned int channels = params_channels(hw_params); 278 unsigned int frames_per_period = params_period_size(hw_params); 279 unsigned int frames_per_buffer = params_buffer_size(hw_params); 280 281 mutex_lock(&oxfw->mutex); 282 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream, 283 rate, channels, frames_per_period, 284 frames_per_buffer); 285 if (err >= 0) 286 ++oxfw->substreams_count; 287 mutex_unlock(&oxfw->mutex); 288 } 289 290 return 0; 291 } 292 293 static int pcm_capture_hw_free(struct snd_pcm_substream *substream) 294 { 295 struct snd_oxfw *oxfw = substream->private_data; 296 297 mutex_lock(&oxfw->mutex); 298 299 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 300 --oxfw->substreams_count; 301 302 snd_oxfw_stream_stop_duplex(oxfw); 303 304 mutex_unlock(&oxfw->mutex); 305 306 return snd_pcm_lib_free_vmalloc_buffer(substream); 307 } 308 static int pcm_playback_hw_free(struct snd_pcm_substream *substream) 309 { 310 struct snd_oxfw *oxfw = substream->private_data; 311 312 mutex_lock(&oxfw->mutex); 313 314 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 315 --oxfw->substreams_count; 316 317 snd_oxfw_stream_stop_duplex(oxfw); 318 319 mutex_unlock(&oxfw->mutex); 320 321 return snd_pcm_lib_free_vmalloc_buffer(substream); 322 } 323 324 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 325 { 326 struct snd_oxfw *oxfw = substream->private_data; 327 int err; 328 329 mutex_lock(&oxfw->mutex); 330 err = snd_oxfw_stream_start_duplex(oxfw); 331 mutex_unlock(&oxfw->mutex); 332 if (err < 0) 333 goto end; 334 335 amdtp_stream_pcm_prepare(&oxfw->tx_stream); 336 end: 337 return err; 338 } 339 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 340 { 341 struct snd_oxfw *oxfw = substream->private_data; 342 int err; 343 344 mutex_lock(&oxfw->mutex); 345 err = snd_oxfw_stream_start_duplex(oxfw); 346 mutex_unlock(&oxfw->mutex); 347 if (err < 0) 348 goto end; 349 350 amdtp_stream_pcm_prepare(&oxfw->rx_stream); 351 end: 352 return err; 353 } 354 355 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 356 { 357 struct snd_oxfw *oxfw = substream->private_data; 358 struct snd_pcm_substream *pcm; 359 360 switch (cmd) { 361 case SNDRV_PCM_TRIGGER_START: 362 pcm = substream; 363 break; 364 case SNDRV_PCM_TRIGGER_STOP: 365 pcm = NULL; 366 break; 367 default: 368 return -EINVAL; 369 } 370 amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm); 371 return 0; 372 } 373 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 374 { 375 struct snd_oxfw *oxfw = substream->private_data; 376 struct snd_pcm_substream *pcm; 377 378 switch (cmd) { 379 case SNDRV_PCM_TRIGGER_START: 380 pcm = substream; 381 break; 382 case SNDRV_PCM_TRIGGER_STOP: 383 pcm = NULL; 384 break; 385 default: 386 return -EINVAL; 387 } 388 amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm); 389 return 0; 390 } 391 392 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm) 393 { 394 struct snd_oxfw *oxfw = sbstm->private_data; 395 396 return amdtp_stream_pcm_pointer(&oxfw->tx_stream); 397 } 398 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm) 399 { 400 struct snd_oxfw *oxfw = sbstm->private_data; 401 402 return amdtp_stream_pcm_pointer(&oxfw->rx_stream); 403 } 404 405 static int pcm_capture_ack(struct snd_pcm_substream *substream) 406 { 407 struct snd_oxfw *oxfw = substream->private_data; 408 409 return amdtp_stream_pcm_ack(&oxfw->tx_stream); 410 } 411 412 static int pcm_playback_ack(struct snd_pcm_substream *substream) 413 { 414 struct snd_oxfw *oxfw = substream->private_data; 415 416 return amdtp_stream_pcm_ack(&oxfw->rx_stream); 417 } 418 419 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw) 420 { 421 static const struct snd_pcm_ops capture_ops = { 422 .open = pcm_open, 423 .close = pcm_close, 424 .ioctl = snd_pcm_lib_ioctl, 425 .hw_params = pcm_capture_hw_params, 426 .hw_free = pcm_capture_hw_free, 427 .prepare = pcm_capture_prepare, 428 .trigger = pcm_capture_trigger, 429 .pointer = pcm_capture_pointer, 430 .ack = pcm_capture_ack, 431 .page = snd_pcm_lib_get_vmalloc_page, 432 }; 433 static const struct snd_pcm_ops playback_ops = { 434 .open = pcm_open, 435 .close = pcm_close, 436 .ioctl = snd_pcm_lib_ioctl, 437 .hw_params = pcm_playback_hw_params, 438 .hw_free = pcm_playback_hw_free, 439 .prepare = pcm_playback_prepare, 440 .trigger = pcm_playback_trigger, 441 .pointer = pcm_playback_pointer, 442 .ack = pcm_playback_ack, 443 .page = snd_pcm_lib_get_vmalloc_page, 444 }; 445 struct snd_pcm *pcm; 446 unsigned int cap = 0; 447 int err; 448 449 if (oxfw->has_output) 450 cap = 1; 451 452 err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm); 453 if (err < 0) 454 return err; 455 456 pcm->private_data = oxfw; 457 strcpy(pcm->name, oxfw->card->shortname); 458 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 459 if (cap > 0) 460 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 461 462 return 0; 463 } 464