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 = 0; 192 193 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) { 194 unsigned int rate = params_rate(hw_params); 195 unsigned int frames_per_period = params_period_size(hw_params); 196 unsigned int frames_per_buffer = params_buffer_size(hw_params); 197 198 mutex_lock(&dg00x->mutex); 199 err = snd_dg00x_stream_reserve_duplex(dg00x, rate, 200 frames_per_period, frames_per_buffer); 201 if (err >= 0) 202 ++dg00x->substreams_counter; 203 mutex_unlock(&dg00x->mutex); 204 } 205 206 return err; 207 } 208 209 static int pcm_hw_free(struct snd_pcm_substream *substream) 210 { 211 struct snd_dg00x *dg00x = substream->private_data; 212 213 mutex_lock(&dg00x->mutex); 214 215 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN) 216 --dg00x->substreams_counter; 217 218 snd_dg00x_stream_stop_duplex(dg00x); 219 220 mutex_unlock(&dg00x->mutex); 221 222 return 0; 223 } 224 225 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 226 { 227 struct snd_dg00x *dg00x = substream->private_data; 228 int err; 229 230 mutex_lock(&dg00x->mutex); 231 232 err = snd_dg00x_stream_start_duplex(dg00x); 233 if (err >= 0) 234 amdtp_stream_pcm_prepare(&dg00x->tx_stream); 235 236 mutex_unlock(&dg00x->mutex); 237 238 return err; 239 } 240 241 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 242 { 243 struct snd_dg00x *dg00x = substream->private_data; 244 int err; 245 246 mutex_lock(&dg00x->mutex); 247 248 err = snd_dg00x_stream_start_duplex(dg00x); 249 if (err >= 0) { 250 amdtp_stream_pcm_prepare(&dg00x->rx_stream); 251 amdtp_dot_reset(&dg00x->rx_stream); 252 } 253 254 mutex_unlock(&dg00x->mutex); 255 256 return err; 257 } 258 259 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 260 { 261 struct snd_dg00x *dg00x = substream->private_data; 262 263 switch (cmd) { 264 case SNDRV_PCM_TRIGGER_START: 265 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream); 266 break; 267 case SNDRV_PCM_TRIGGER_STOP: 268 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL); 269 break; 270 default: 271 return -EINVAL; 272 } 273 274 return 0; 275 } 276 277 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 278 { 279 struct snd_dg00x *dg00x = substream->private_data; 280 281 switch (cmd) { 282 case SNDRV_PCM_TRIGGER_START: 283 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream); 284 break; 285 case SNDRV_PCM_TRIGGER_STOP: 286 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL); 287 break; 288 default: 289 return -EINVAL; 290 } 291 292 return 0; 293 } 294 295 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) 296 { 297 struct snd_dg00x *dg00x = sbstrm->private_data; 298 299 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->tx_stream); 300 } 301 302 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) 303 { 304 struct snd_dg00x *dg00x = sbstrm->private_data; 305 306 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->rx_stream); 307 } 308 309 static int pcm_capture_ack(struct snd_pcm_substream *substream) 310 { 311 struct snd_dg00x *dg00x = substream->private_data; 312 313 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->tx_stream); 314 } 315 316 static int pcm_playback_ack(struct snd_pcm_substream *substream) 317 { 318 struct snd_dg00x *dg00x = substream->private_data; 319 320 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->rx_stream); 321 } 322 323 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x) 324 { 325 static const struct snd_pcm_ops capture_ops = { 326 .open = pcm_open, 327 .close = pcm_close, 328 .hw_params = pcm_hw_params, 329 .hw_free = pcm_hw_free, 330 .prepare = pcm_capture_prepare, 331 .trigger = pcm_capture_trigger, 332 .pointer = pcm_capture_pointer, 333 .ack = pcm_capture_ack, 334 }; 335 static const struct snd_pcm_ops playback_ops = { 336 .open = pcm_open, 337 .close = pcm_close, 338 .hw_params = pcm_hw_params, 339 .hw_free = pcm_hw_free, 340 .prepare = pcm_playback_prepare, 341 .trigger = pcm_playback_trigger, 342 .pointer = pcm_playback_pointer, 343 .ack = pcm_playback_ack, 344 }; 345 struct snd_pcm *pcm; 346 int err; 347 348 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm); 349 if (err < 0) 350 return err; 351 352 pcm->private_data = dg00x; 353 snprintf(pcm->name, sizeof(pcm->name), 354 "%s PCM", dg00x->card->shortname); 355 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 356 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 357 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); 358 359 return 0; 360 } 361