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_alloc_vmalloc_buffer(substream, 194 params_buffer_bytes(hw_params)); 195 if (err < 0) 196 return err; 197 198 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 199 unsigned int rate = params_rate(hw_params); 200 unsigned int frames_per_period = params_period_size(hw_params); 201 unsigned int frames_per_buffer = params_buffer_size(hw_params); 202 203 mutex_lock(&dg00x->mutex); 204 err = snd_dg00x_stream_reserve_duplex(dg00x, rate, 205 frames_per_period, frames_per_buffer); 206 if (err >= 0) 207 ++dg00x->substreams_counter; 208 mutex_unlock(&dg00x->mutex); 209 } 210 211 return err; 212 } 213 214 static int pcm_hw_free(struct snd_pcm_substream *substream) 215 { 216 struct snd_dg00x *dg00x = substream->private_data; 217 218 mutex_lock(&dg00x->mutex); 219 220 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 221 --dg00x->substreams_counter; 222 223 snd_dg00x_stream_stop_duplex(dg00x); 224 225 mutex_unlock(&dg00x->mutex); 226 227 return snd_pcm_lib_free_vmalloc_buffer(substream); 228 } 229 230 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 231 { 232 struct snd_dg00x *dg00x = substream->private_data; 233 int err; 234 235 mutex_lock(&dg00x->mutex); 236 237 err = snd_dg00x_stream_start_duplex(dg00x); 238 if (err >= 0) 239 amdtp_stream_pcm_prepare(&dg00x->tx_stream); 240 241 mutex_unlock(&dg00x->mutex); 242 243 return err; 244 } 245 246 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 247 { 248 struct snd_dg00x *dg00x = substream->private_data; 249 int err; 250 251 mutex_lock(&dg00x->mutex); 252 253 err = snd_dg00x_stream_start_duplex(dg00x); 254 if (err >= 0) { 255 amdtp_stream_pcm_prepare(&dg00x->rx_stream); 256 amdtp_dot_reset(&dg00x->rx_stream); 257 } 258 259 mutex_unlock(&dg00x->mutex); 260 261 return err; 262 } 263 264 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 265 { 266 struct snd_dg00x *dg00x = substream->private_data; 267 268 switch (cmd) { 269 case SNDRV_PCM_TRIGGER_START: 270 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream); 271 break; 272 case SNDRV_PCM_TRIGGER_STOP: 273 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL); 274 break; 275 default: 276 return -EINVAL; 277 } 278 279 return 0; 280 } 281 282 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 283 { 284 struct snd_dg00x *dg00x = substream->private_data; 285 286 switch (cmd) { 287 case SNDRV_PCM_TRIGGER_START: 288 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream); 289 break; 290 case SNDRV_PCM_TRIGGER_STOP: 291 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL); 292 break; 293 default: 294 return -EINVAL; 295 } 296 297 return 0; 298 } 299 300 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) 301 { 302 struct snd_dg00x *dg00x = sbstrm->private_data; 303 304 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->tx_stream); 305 } 306 307 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) 308 { 309 struct snd_dg00x *dg00x = sbstrm->private_data; 310 311 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->rx_stream); 312 } 313 314 static int pcm_capture_ack(struct snd_pcm_substream *substream) 315 { 316 struct snd_dg00x *dg00x = substream->private_data; 317 318 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->tx_stream); 319 } 320 321 static int pcm_playback_ack(struct snd_pcm_substream *substream) 322 { 323 struct snd_dg00x *dg00x = substream->private_data; 324 325 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->rx_stream); 326 } 327 328 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x) 329 { 330 static const struct snd_pcm_ops capture_ops = { 331 .open = pcm_open, 332 .close = pcm_close, 333 .ioctl = snd_pcm_lib_ioctl, 334 .hw_params = pcm_hw_params, 335 .hw_free = pcm_hw_free, 336 .prepare = pcm_capture_prepare, 337 .trigger = pcm_capture_trigger, 338 .pointer = pcm_capture_pointer, 339 .ack = pcm_capture_ack, 340 .page = snd_pcm_lib_get_vmalloc_page, 341 }; 342 static const struct snd_pcm_ops playback_ops = { 343 .open = pcm_open, 344 .close = pcm_close, 345 .ioctl = snd_pcm_lib_ioctl, 346 .hw_params = pcm_hw_params, 347 .hw_free = pcm_hw_free, 348 .prepare = pcm_playback_prepare, 349 .trigger = pcm_playback_trigger, 350 .pointer = pcm_playback_pointer, 351 .ack = pcm_playback_ack, 352 .page = snd_pcm_lib_get_vmalloc_page, 353 }; 354 struct snd_pcm *pcm; 355 int err; 356 357 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm); 358 if (err < 0) 359 return err; 360 361 pcm->private_data = dg00x; 362 snprintf(pcm->name, sizeof(pcm->name), 363 "%s PCM", dg00x->card->shortname); 364 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 365 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 366 367 return 0; 368 } 369