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 scoped_guard(mutex, &oxfw->mutex) { 185 // When source of clock is not internal or any stream is reserved for 186 // transmission of PCM frames, the available sampling rate is limited 187 // at current one. 188 if (oxfw->substreams_count > 0 && d->events_per_period > 0) { 189 unsigned int frames_per_period = d->events_per_period; 190 unsigned int frames_per_buffer = d->events_per_buffer; 191 192 err = limit_to_current_params(substream); 193 if (err < 0) 194 goto err_locked; 195 196 if (frames_per_period > 0) { 197 err = snd_pcm_hw_constraint_minmax(substream->runtime, 198 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 199 frames_per_period, frames_per_period); 200 if (err < 0) 201 goto err_locked; 202 203 err = snd_pcm_hw_constraint_minmax(substream->runtime, 204 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 205 frames_per_buffer, frames_per_buffer); 206 if (err < 0) 207 goto err_locked; 208 } 209 } 210 } 211 212 snd_pcm_set_sync(substream); 213 214 return 0; 215 err_locked: 216 snd_oxfw_stream_lock_release(oxfw); 217 return err; 218 } 219 220 static int pcm_close(struct snd_pcm_substream *substream) 221 { 222 struct snd_oxfw *oxfw = substream->private_data; 223 224 snd_oxfw_stream_lock_release(oxfw); 225 return 0; 226 } 227 228 static int pcm_capture_hw_params(struct snd_pcm_substream *substream, 229 struct snd_pcm_hw_params *hw_params) 230 { 231 struct snd_oxfw *oxfw = substream->private_data; 232 int err = 0; 233 234 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) { 235 unsigned int rate = params_rate(hw_params); 236 unsigned int channels = params_channels(hw_params); 237 unsigned int frames_per_period = params_period_size(hw_params); 238 unsigned int frames_per_buffer = params_buffer_size(hw_params); 239 240 guard(mutex)(&oxfw->mutex); 241 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream, 242 rate, channels, frames_per_period, 243 frames_per_buffer); 244 if (err >= 0) 245 ++oxfw->substreams_count; 246 } 247 248 return err; 249 } 250 static int pcm_playback_hw_params(struct snd_pcm_substream *substream, 251 struct snd_pcm_hw_params *hw_params) 252 { 253 struct snd_oxfw *oxfw = substream->private_data; 254 int err = 0; 255 256 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) { 257 unsigned int rate = params_rate(hw_params); 258 unsigned int channels = params_channels(hw_params); 259 unsigned int frames_per_period = params_period_size(hw_params); 260 unsigned int frames_per_buffer = params_buffer_size(hw_params); 261 262 guard(mutex)(&oxfw->mutex); 263 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream, 264 rate, channels, frames_per_period, 265 frames_per_buffer); 266 if (err >= 0) 267 ++oxfw->substreams_count; 268 } 269 270 return err; 271 } 272 273 static int pcm_capture_hw_free(struct snd_pcm_substream *substream) 274 { 275 struct snd_oxfw *oxfw = substream->private_data; 276 277 guard(mutex)(&oxfw->mutex); 278 279 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN) 280 --oxfw->substreams_count; 281 282 snd_oxfw_stream_stop_duplex(oxfw); 283 284 return 0; 285 } 286 static int pcm_playback_hw_free(struct snd_pcm_substream *substream) 287 { 288 struct snd_oxfw *oxfw = substream->private_data; 289 290 guard(mutex)(&oxfw->mutex); 291 292 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN) 293 --oxfw->substreams_count; 294 295 snd_oxfw_stream_stop_duplex(oxfw); 296 297 return 0; 298 } 299 300 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 301 { 302 struct snd_oxfw *oxfw = substream->private_data; 303 int err; 304 305 scoped_guard(mutex, &oxfw->mutex) { 306 err = snd_oxfw_stream_start_duplex(oxfw); 307 if (err < 0) 308 return err; 309 } 310 311 amdtp_stream_pcm_prepare(&oxfw->tx_stream); 312 return 0; 313 } 314 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 315 { 316 struct snd_oxfw *oxfw = substream->private_data; 317 int err; 318 319 scoped_guard(mutex, &oxfw->mutex) { 320 err = snd_oxfw_stream_start_duplex(oxfw); 321 if (err < 0) 322 return err; 323 } 324 325 amdtp_stream_pcm_prepare(&oxfw->rx_stream); 326 return 0; 327 } 328 329 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 330 { 331 struct snd_oxfw *oxfw = substream->private_data; 332 struct snd_pcm_substream *pcm; 333 334 switch (cmd) { 335 case SNDRV_PCM_TRIGGER_START: 336 pcm = substream; 337 break; 338 case SNDRV_PCM_TRIGGER_STOP: 339 pcm = NULL; 340 break; 341 default: 342 return -EINVAL; 343 } 344 amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm); 345 return 0; 346 } 347 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 348 { 349 struct snd_oxfw *oxfw = substream->private_data; 350 struct snd_pcm_substream *pcm; 351 352 switch (cmd) { 353 case SNDRV_PCM_TRIGGER_START: 354 pcm = substream; 355 break; 356 case SNDRV_PCM_TRIGGER_STOP: 357 pcm = NULL; 358 break; 359 default: 360 return -EINVAL; 361 } 362 amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm); 363 return 0; 364 } 365 366 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm) 367 { 368 struct snd_oxfw *oxfw = sbstm->private_data; 369 370 return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->tx_stream); 371 } 372 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm) 373 { 374 struct snd_oxfw *oxfw = sbstm->private_data; 375 376 return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->rx_stream); 377 } 378 379 static int pcm_capture_ack(struct snd_pcm_substream *substream) 380 { 381 struct snd_oxfw *oxfw = substream->private_data; 382 383 return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->tx_stream); 384 } 385 386 static int pcm_playback_ack(struct snd_pcm_substream *substream) 387 { 388 struct snd_oxfw *oxfw = substream->private_data; 389 390 return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->rx_stream); 391 } 392 393 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw) 394 { 395 static const struct snd_pcm_ops capture_ops = { 396 .open = pcm_open, 397 .close = pcm_close, 398 .hw_params = pcm_capture_hw_params, 399 .hw_free = pcm_capture_hw_free, 400 .prepare = pcm_capture_prepare, 401 .trigger = pcm_capture_trigger, 402 .pointer = pcm_capture_pointer, 403 .ack = pcm_capture_ack, 404 }; 405 static const struct snd_pcm_ops playback_ops = { 406 .open = pcm_open, 407 .close = pcm_close, 408 .hw_params = pcm_playback_hw_params, 409 .hw_free = pcm_playback_hw_free, 410 .prepare = pcm_playback_prepare, 411 .trigger = pcm_playback_trigger, 412 .pointer = pcm_playback_pointer, 413 .ack = pcm_playback_ack, 414 }; 415 struct snd_pcm *pcm; 416 unsigned int cap = 0; 417 int err; 418 419 if (oxfw->has_output) 420 cap = 1; 421 422 err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm); 423 if (err < 0) 424 return err; 425 426 pcm->private_data = oxfw; 427 pcm->nonatomic = true; 428 strscpy(pcm->name, oxfw->card->shortname); 429 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 430 if (cap > 0) 431 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 432 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); 433 434 return 0; 435 } 436