1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * dice_pcm.c - a part of driver for DICE based devices 4 * 5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de> 6 * Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp> 7 */ 8 9 #include "dice.h" 10 11 static int dice_rate_constraint(struct snd_pcm_hw_params *params, 12 struct snd_pcm_hw_rule *rule) 13 { 14 struct snd_pcm_substream *substream = rule->private; 15 struct snd_dice *dice = substream->private_data; 16 unsigned int index = substream->pcm->device; 17 18 const struct snd_interval *c = 19 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); 20 struct snd_interval *r = 21 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 22 struct snd_interval rates = { 23 .min = UINT_MAX, .max = 0, .integer = 1 24 }; 25 unsigned int *pcm_channels; 26 enum snd_dice_rate_mode mode; 27 unsigned int i, rate; 28 29 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 30 pcm_channels = dice->tx_pcm_chs[index]; 31 else 32 pcm_channels = dice->rx_pcm_chs[index]; 33 34 for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) { 35 rate = snd_dice_rates[i]; 36 if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0) 37 continue; 38 39 if (!snd_interval_test(c, pcm_channels[mode])) 40 continue; 41 42 rates.min = min(rates.min, rate); 43 rates.max = max(rates.max, rate); 44 } 45 46 return snd_interval_refine(r, &rates); 47 } 48 49 static int dice_channels_constraint(struct snd_pcm_hw_params *params, 50 struct snd_pcm_hw_rule *rule) 51 { 52 struct snd_pcm_substream *substream = rule->private; 53 struct snd_dice *dice = substream->private_data; 54 unsigned int index = substream->pcm->device; 55 56 const struct snd_interval *r = 57 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); 58 struct snd_interval *c = 59 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 60 struct snd_interval channels = { 61 .min = UINT_MAX, .max = 0, .integer = 1 62 }; 63 unsigned int *pcm_channels; 64 enum snd_dice_rate_mode mode; 65 unsigned int i, rate; 66 67 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 68 pcm_channels = dice->tx_pcm_chs[index]; 69 else 70 pcm_channels = dice->rx_pcm_chs[index]; 71 72 for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) { 73 rate = snd_dice_rates[i]; 74 if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0) 75 continue; 76 77 if (!snd_interval_test(r, rate)) 78 continue; 79 80 channels.min = min(channels.min, pcm_channels[mode]); 81 channels.max = max(channels.max, pcm_channels[mode]); 82 } 83 84 return snd_interval_refine(c, &channels); 85 } 86 87 static int limit_channels_and_rates(struct snd_dice *dice, 88 struct snd_pcm_runtime *runtime, 89 enum amdtp_stream_direction dir, 90 unsigned int index) 91 { 92 struct snd_pcm_hardware *hw = &runtime->hw; 93 unsigned int *pcm_channels; 94 unsigned int i; 95 96 if (dir == AMDTP_IN_STREAM) 97 pcm_channels = dice->tx_pcm_chs[index]; 98 else 99 pcm_channels = dice->rx_pcm_chs[index]; 100 101 hw->channels_min = UINT_MAX; 102 hw->channels_max = 0; 103 104 for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) { 105 enum snd_dice_rate_mode mode; 106 unsigned int rate, channels; 107 108 rate = snd_dice_rates[i]; 109 if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0) 110 continue; 111 hw->rates |= snd_pcm_rate_to_rate_bit(rate); 112 113 channels = pcm_channels[mode]; 114 if (channels == 0) 115 continue; 116 hw->channels_min = min(hw->channels_min, channels); 117 hw->channels_max = max(hw->channels_max, channels); 118 } 119 120 snd_pcm_limit_hw_rates(runtime); 121 122 return 0; 123 } 124 125 static int init_hw_info(struct snd_dice *dice, 126 struct snd_pcm_substream *substream) 127 { 128 struct snd_pcm_runtime *runtime = substream->runtime; 129 struct snd_pcm_hardware *hw = &runtime->hw; 130 unsigned int index = substream->pcm->device; 131 enum amdtp_stream_direction dir; 132 struct amdtp_stream *stream; 133 int err; 134 135 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 136 hw->formats = AM824_IN_PCM_FORMAT_BITS; 137 dir = AMDTP_IN_STREAM; 138 stream = &dice->tx_stream[index]; 139 } else { 140 hw->formats = AM824_OUT_PCM_FORMAT_BITS; 141 dir = AMDTP_OUT_STREAM; 142 stream = &dice->rx_stream[index]; 143 } 144 145 err = limit_channels_and_rates(dice, substream->runtime, dir, 146 index); 147 if (err < 0) 148 return err; 149 150 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 151 dice_rate_constraint, substream, 152 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 153 if (err < 0) 154 return err; 155 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 156 dice_channels_constraint, substream, 157 SNDRV_PCM_HW_PARAM_RATE, -1); 158 if (err < 0) 159 return err; 160 161 return amdtp_am824_add_pcm_hw_constraints(stream, runtime); 162 } 163 164 static int pcm_open(struct snd_pcm_substream *substream) 165 { 166 struct snd_dice *dice = substream->private_data; 167 unsigned int source; 168 bool internal; 169 int err; 170 171 err = snd_dice_stream_lock_try(dice); 172 if (err < 0) 173 goto end; 174 175 err = init_hw_info(dice, substream); 176 if (err < 0) 177 goto err_locked; 178 179 err = snd_dice_transaction_get_clock_source(dice, &source); 180 if (err < 0) 181 goto err_locked; 182 switch (source) { 183 case CLOCK_SOURCE_AES1: 184 case CLOCK_SOURCE_AES2: 185 case CLOCK_SOURCE_AES3: 186 case CLOCK_SOURCE_AES4: 187 case CLOCK_SOURCE_AES_ANY: 188 case CLOCK_SOURCE_ADAT: 189 case CLOCK_SOURCE_TDIF: 190 case CLOCK_SOURCE_WC: 191 internal = false; 192 break; 193 default: 194 internal = true; 195 break; 196 } 197 198 /* 199 * When source of clock is not internal or any PCM streams are running, 200 * available sampling rate is limited at current sampling rate. 201 */ 202 if (!internal || 203 amdtp_stream_pcm_running(&dice->tx_stream[0]) || 204 amdtp_stream_pcm_running(&dice->tx_stream[1]) || 205 amdtp_stream_pcm_running(&dice->rx_stream[0]) || 206 amdtp_stream_pcm_running(&dice->rx_stream[1])) { 207 unsigned int rate; 208 209 err = snd_dice_transaction_get_rate(dice, &rate); 210 if (err < 0) 211 goto err_locked; 212 substream->runtime->hw.rate_min = rate; 213 substream->runtime->hw.rate_max = rate; 214 } 215 216 snd_pcm_set_sync(substream); 217 end: 218 return err; 219 err_locked: 220 snd_dice_stream_lock_release(dice); 221 return err; 222 } 223 224 static int pcm_close(struct snd_pcm_substream *substream) 225 { 226 struct snd_dice *dice = substream->private_data; 227 228 snd_dice_stream_lock_release(dice); 229 230 return 0; 231 } 232 233 static int pcm_hw_params(struct snd_pcm_substream *substream, 234 struct snd_pcm_hw_params *hw_params) 235 { 236 struct snd_dice *dice = substream->private_data; 237 int err; 238 239 err = snd_pcm_lib_alloc_vmalloc_buffer(substream, 240 params_buffer_bytes(hw_params)); 241 if (err < 0) 242 return err; 243 244 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 245 unsigned int rate = params_rate(hw_params); 246 247 mutex_lock(&dice->mutex); 248 err = snd_dice_stream_reserve_duplex(dice, rate); 249 if (err >= 0) 250 ++dice->substreams_counter; 251 mutex_unlock(&dice->mutex); 252 } 253 254 return err; 255 } 256 257 static int pcm_hw_free(struct snd_pcm_substream *substream) 258 { 259 struct snd_dice *dice = substream->private_data; 260 261 mutex_lock(&dice->mutex); 262 263 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 264 --dice->substreams_counter; 265 266 snd_dice_stream_stop_duplex(dice); 267 268 mutex_unlock(&dice->mutex); 269 270 return snd_pcm_lib_free_vmalloc_buffer(substream); 271 } 272 273 static int capture_prepare(struct snd_pcm_substream *substream) 274 { 275 struct snd_dice *dice = substream->private_data; 276 struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device]; 277 int err; 278 279 mutex_lock(&dice->mutex); 280 err = snd_dice_stream_start_duplex(dice); 281 mutex_unlock(&dice->mutex); 282 if (err >= 0) 283 amdtp_stream_pcm_prepare(stream); 284 285 return 0; 286 } 287 static int playback_prepare(struct snd_pcm_substream *substream) 288 { 289 struct snd_dice *dice = substream->private_data; 290 struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device]; 291 int err; 292 293 mutex_lock(&dice->mutex); 294 err = snd_dice_stream_start_duplex(dice); 295 mutex_unlock(&dice->mutex); 296 if (err >= 0) 297 amdtp_stream_pcm_prepare(stream); 298 299 return err; 300 } 301 302 static int capture_trigger(struct snd_pcm_substream *substream, int cmd) 303 { 304 struct snd_dice *dice = substream->private_data; 305 struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device]; 306 307 switch (cmd) { 308 case SNDRV_PCM_TRIGGER_START: 309 amdtp_stream_pcm_trigger(stream, substream); 310 break; 311 case SNDRV_PCM_TRIGGER_STOP: 312 amdtp_stream_pcm_trigger(stream, NULL); 313 break; 314 default: 315 return -EINVAL; 316 } 317 318 return 0; 319 } 320 static int playback_trigger(struct snd_pcm_substream *substream, int cmd) 321 { 322 struct snd_dice *dice = substream->private_data; 323 struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device]; 324 325 switch (cmd) { 326 case SNDRV_PCM_TRIGGER_START: 327 amdtp_stream_pcm_trigger(stream, substream); 328 break; 329 case SNDRV_PCM_TRIGGER_STOP: 330 amdtp_stream_pcm_trigger(stream, NULL); 331 break; 332 default: 333 return -EINVAL; 334 } 335 336 return 0; 337 } 338 339 static snd_pcm_uframes_t capture_pointer(struct snd_pcm_substream *substream) 340 { 341 struct snd_dice *dice = substream->private_data; 342 struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device]; 343 344 return amdtp_stream_pcm_pointer(stream); 345 } 346 static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream) 347 { 348 struct snd_dice *dice = substream->private_data; 349 struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device]; 350 351 return amdtp_stream_pcm_pointer(stream); 352 } 353 354 static int capture_ack(struct snd_pcm_substream *substream) 355 { 356 struct snd_dice *dice = substream->private_data; 357 struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device]; 358 359 return amdtp_stream_pcm_ack(stream); 360 } 361 362 static int playback_ack(struct snd_pcm_substream *substream) 363 { 364 struct snd_dice *dice = substream->private_data; 365 struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device]; 366 367 return amdtp_stream_pcm_ack(stream); 368 } 369 370 int snd_dice_create_pcm(struct snd_dice *dice) 371 { 372 static const struct snd_pcm_ops capture_ops = { 373 .open = pcm_open, 374 .close = pcm_close, 375 .ioctl = snd_pcm_lib_ioctl, 376 .hw_params = pcm_hw_params, 377 .hw_free = pcm_hw_free, 378 .prepare = capture_prepare, 379 .trigger = capture_trigger, 380 .pointer = capture_pointer, 381 .ack = capture_ack, 382 .page = snd_pcm_lib_get_vmalloc_page, 383 }; 384 static const struct snd_pcm_ops playback_ops = { 385 .open = pcm_open, 386 .close = pcm_close, 387 .ioctl = snd_pcm_lib_ioctl, 388 .hw_params = pcm_hw_params, 389 .hw_free = pcm_hw_free, 390 .prepare = playback_prepare, 391 .trigger = playback_trigger, 392 .pointer = playback_pointer, 393 .ack = playback_ack, 394 .page = snd_pcm_lib_get_vmalloc_page, 395 }; 396 struct snd_pcm *pcm; 397 unsigned int capture, playback; 398 int i, j; 399 int err; 400 401 for (i = 0; i < MAX_STREAMS; i++) { 402 capture = playback = 0; 403 for (j = 0; j < SND_DICE_RATE_MODE_COUNT; ++j) { 404 if (dice->tx_pcm_chs[i][j] > 0) 405 capture = 1; 406 if (dice->rx_pcm_chs[i][j] > 0) 407 playback = 1; 408 } 409 410 err = snd_pcm_new(dice->card, "DICE", i, playback, capture, 411 &pcm); 412 if (err < 0) 413 return err; 414 pcm->private_data = dice; 415 strcpy(pcm->name, dice->card->shortname); 416 417 if (capture > 0) 418 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 419 &capture_ops); 420 421 if (playback > 0) 422 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 423 &playback_ops); 424 } 425 426 return 0; 427 } 428