1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family 4 * 5 * Copyright (c) 2014-2015 Takashi Sakamoto 6 */ 7 8 #include "digi00x.h" 9 10 static int hw_rule_rate(struct snd_pcm_hw_params *params, 11 struct snd_pcm_hw_rule *rule) 12 { 13 struct snd_interval *r = 14 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 15 const struct snd_interval *c = 16 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); 17 struct snd_interval t = { 18 .min = UINT_MAX, .max = 0, .integer = 1, 19 }; 20 unsigned int i; 21 22 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) { 23 if (!snd_interval_test(c, 24 snd_dg00x_stream_pcm_channels[i])) 25 continue; 26 27 t.min = min(t.min, snd_dg00x_stream_rates[i]); 28 t.max = max(t.max, snd_dg00x_stream_rates[i]); 29 } 30 31 return snd_interval_refine(r, &t); 32 } 33 34 static int hw_rule_channels(struct snd_pcm_hw_params *params, 35 struct snd_pcm_hw_rule *rule) 36 { 37 struct snd_interval *c = 38 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 39 const struct snd_interval *r = 40 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); 41 struct snd_interval t = { 42 .min = UINT_MAX, .max = 0, .integer = 1, 43 }; 44 unsigned int i; 45 46 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) { 47 if (!snd_interval_test(r, snd_dg00x_stream_rates[i])) 48 continue; 49 50 t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]); 51 t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]); 52 } 53 54 return snd_interval_refine(c, &t); 55 } 56 57 static int pcm_init_hw_params(struct snd_dg00x *dg00x, 58 struct snd_pcm_substream *substream) 59 { 60 struct snd_pcm_runtime *runtime = substream->runtime; 61 struct snd_pcm_hardware *hw = &runtime->hw; 62 struct amdtp_stream *s; 63 int err; 64 65 66 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 67 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; 68 s = &dg00x->tx_stream; 69 } else { 70 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; 71 s = &dg00x->rx_stream; 72 } 73 74 hw->channels_min = 10; 75 hw->channels_max = 18; 76 77 hw->rates = SNDRV_PCM_RATE_44100 | 78 SNDRV_PCM_RATE_48000 | 79 SNDRV_PCM_RATE_88200 | 80 SNDRV_PCM_RATE_96000; 81 snd_pcm_limit_hw_rates(runtime); 82 83 err = snd_pcm_hw_rule_add(substream->runtime, 0, 84 SNDRV_PCM_HW_PARAM_CHANNELS, 85 hw_rule_channels, NULL, 86 SNDRV_PCM_HW_PARAM_RATE, -1); 87 if (err < 0) 88 return err; 89 90 err = snd_pcm_hw_rule_add(substream->runtime, 0, 91 SNDRV_PCM_HW_PARAM_RATE, 92 hw_rule_rate, NULL, 93 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 94 if (err < 0) 95 return err; 96 97 return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime); 98 } 99 100 static int pcm_open(struct snd_pcm_substream *substream) 101 { 102 struct snd_dg00x *dg00x = substream->private_data; 103 struct amdtp_domain *d = &dg00x->domain; 104 enum snd_dg00x_clock clock; 105 bool detect; 106 int err; 107 108 err = snd_dg00x_stream_lock_try(dg00x); 109 if (err < 0) 110 return err; 111 112 err = pcm_init_hw_params(dg00x, substream); 113 if (err < 0) 114 goto err_locked; 115 116 /* Check current clock source. */ 117 err = snd_dg00x_stream_get_clock(dg00x, &clock); 118 if (err < 0) 119 goto err_locked; 120 if (clock != SND_DG00X_CLOCK_INTERNAL) { 121 err = snd_dg00x_stream_check_external_clock(dg00x, &detect); 122 if (err < 0) 123 goto err_locked; 124 if (!detect) { 125 err = -EBUSY; 126 goto err_locked; 127 } 128 } 129 130 mutex_lock(&dg00x->mutex); 131 132 // When source of clock is not internal or any stream is reserved for 133 // transmission of PCM frames, the available sampling rate is limited 134 // at current one. 135 if ((clock != SND_DG00X_CLOCK_INTERNAL) || 136 (dg00x->substreams_counter > 0 && d->events_per_period > 0)) { 137 unsigned int frames_per_period = d->events_per_period; 138 unsigned int frames_per_buffer = d->events_per_buffer; 139 unsigned int rate; 140 141 err = snd_dg00x_stream_get_external_rate(dg00x, &rate); 142 if (err < 0) { 143 mutex_unlock(&dg00x->mutex); 144 goto err_locked; 145 } 146 substream->runtime->hw.rate_min = rate; 147 substream->runtime->hw.rate_max = rate; 148 149 if (frames_per_period > 0) { 150 err = snd_pcm_hw_constraint_minmax(substream->runtime, 151 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 152 frames_per_period, frames_per_period); 153 if (err < 0) { 154 mutex_unlock(&dg00x->mutex); 155 goto err_locked; 156 } 157 158 err = snd_pcm_hw_constraint_minmax(substream->runtime, 159 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 160 frames_per_buffer, frames_per_buffer); 161 if (err < 0) { 162 mutex_unlock(&dg00x->mutex); 163 goto err_locked; 164 } 165 } 166 } 167 168 mutex_unlock(&dg00x->mutex); 169 170 snd_pcm_set_sync(substream); 171 172 return 0; 173 err_locked: 174 snd_dg00x_stream_lock_release(dg00x); 175 return err; 176 } 177 178 static int pcm_close(struct snd_pcm_substream *substream) 179 { 180 struct snd_dg00x *dg00x = substream->private_data; 181 182 snd_dg00x_stream_lock_release(dg00x); 183 184 return 0; 185 } 186 187 static int pcm_hw_params(struct snd_pcm_substream *substream, 188 struct snd_pcm_hw_params *hw_params) 189 { 190 struct snd_dg00x *dg00x = substream->private_data; 191 int err; 192 193 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); 194 if (err < 0) 195 return err; 196 197 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 198 unsigned int rate = params_rate(hw_params); 199 unsigned int frames_per_period = params_period_size(hw_params); 200 unsigned int frames_per_buffer = params_buffer_size(hw_params); 201 202 mutex_lock(&dg00x->mutex); 203 err = snd_dg00x_stream_reserve_duplex(dg00x, rate, 204 frames_per_period, frames_per_buffer); 205 if (err >= 0) 206 ++dg00x->substreams_counter; 207 mutex_unlock(&dg00x->mutex); 208 } 209 210 return err; 211 } 212 213 static int pcm_hw_free(struct snd_pcm_substream *substream) 214 { 215 struct snd_dg00x *dg00x = substream->private_data; 216 217 mutex_lock(&dg00x->mutex); 218 219 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 220 --dg00x->substreams_counter; 221 222 snd_dg00x_stream_stop_duplex(dg00x); 223 224 mutex_unlock(&dg00x->mutex); 225 226 return snd_pcm_lib_free_pages(substream); 227 } 228 229 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 230 { 231 struct snd_dg00x *dg00x = substream->private_data; 232 int err; 233 234 mutex_lock(&dg00x->mutex); 235 236 err = snd_dg00x_stream_start_duplex(dg00x); 237 if (err >= 0) 238 amdtp_stream_pcm_prepare(&dg00x->tx_stream); 239 240 mutex_unlock(&dg00x->mutex); 241 242 return err; 243 } 244 245 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 246 { 247 struct snd_dg00x *dg00x = substream->private_data; 248 int err; 249 250 mutex_lock(&dg00x->mutex); 251 252 err = snd_dg00x_stream_start_duplex(dg00x); 253 if (err >= 0) { 254 amdtp_stream_pcm_prepare(&dg00x->rx_stream); 255 amdtp_dot_reset(&dg00x->rx_stream); 256 } 257 258 mutex_unlock(&dg00x->mutex); 259 260 return err; 261 } 262 263 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 264 { 265 struct snd_dg00x *dg00x = substream->private_data; 266 267 switch (cmd) { 268 case SNDRV_PCM_TRIGGER_START: 269 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream); 270 break; 271 case SNDRV_PCM_TRIGGER_STOP: 272 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL); 273 break; 274 default: 275 return -EINVAL; 276 } 277 278 return 0; 279 } 280 281 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 282 { 283 struct snd_dg00x *dg00x = substream->private_data; 284 285 switch (cmd) { 286 case SNDRV_PCM_TRIGGER_START: 287 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream); 288 break; 289 case SNDRV_PCM_TRIGGER_STOP: 290 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL); 291 break; 292 default: 293 return -EINVAL; 294 } 295 296 return 0; 297 } 298 299 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) 300 { 301 struct snd_dg00x *dg00x = sbstrm->private_data; 302 303 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->tx_stream); 304 } 305 306 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) 307 { 308 struct snd_dg00x *dg00x = sbstrm->private_data; 309 310 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->rx_stream); 311 } 312 313 static int pcm_capture_ack(struct snd_pcm_substream *substream) 314 { 315 struct snd_dg00x *dg00x = substream->private_data; 316 317 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->tx_stream); 318 } 319 320 static int pcm_playback_ack(struct snd_pcm_substream *substream) 321 { 322 struct snd_dg00x *dg00x = substream->private_data; 323 324 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->rx_stream); 325 } 326 327 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x) 328 { 329 static const struct snd_pcm_ops capture_ops = { 330 .open = pcm_open, 331 .close = pcm_close, 332 .ioctl = snd_pcm_lib_ioctl, 333 .hw_params = pcm_hw_params, 334 .hw_free = pcm_hw_free, 335 .prepare = pcm_capture_prepare, 336 .trigger = pcm_capture_trigger, 337 .pointer = pcm_capture_pointer, 338 .ack = pcm_capture_ack, 339 }; 340 static const struct snd_pcm_ops playback_ops = { 341 .open = pcm_open, 342 .close = pcm_close, 343 .ioctl = snd_pcm_lib_ioctl, 344 .hw_params = pcm_hw_params, 345 .hw_free = pcm_hw_free, 346 .prepare = pcm_playback_prepare, 347 .trigger = pcm_playback_trigger, 348 .pointer = pcm_playback_pointer, 349 .ack = pcm_playback_ack, 350 }; 351 struct snd_pcm *pcm; 352 int err; 353 354 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm); 355 if (err < 0) 356 return err; 357 358 pcm->private_data = dg00x; 359 snprintf(pcm->name, sizeof(pcm->name), 360 "%s PCM", dg00x->card->shortname); 361 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 362 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 363 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_VMALLOC, 364 NULL, 0, 0); 365 366 return 0; 367 } 368