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 scoped_guard(mutex, &dg00x->mutex) { 131 // When source of clock is not internal or any stream is reserved for 132 // transmission of PCM frames, the available sampling rate is limited 133 // at current one. 134 if ((clock != SND_DG00X_CLOCK_INTERNAL) || 135 (dg00x->substreams_counter > 0 && d->events_per_period > 0)) { 136 unsigned int frames_per_period = d->events_per_period; 137 unsigned int frames_per_buffer = d->events_per_buffer; 138 unsigned int rate; 139 140 err = snd_dg00x_stream_get_external_rate(dg00x, &rate); 141 if (err < 0) 142 goto err_locked; 143 substream->runtime->hw.rate_min = rate; 144 substream->runtime->hw.rate_max = rate; 145 146 if (frames_per_period > 0) { 147 err = snd_pcm_hw_constraint_minmax(substream->runtime, 148 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 149 frames_per_period, frames_per_period); 150 if (err < 0) 151 goto err_locked; 152 153 err = snd_pcm_hw_constraint_minmax(substream->runtime, 154 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 155 frames_per_buffer, frames_per_buffer); 156 if (err < 0) 157 goto err_locked; 158 } 159 } 160 } 161 162 snd_pcm_set_sync(substream); 163 164 return 0; 165 err_locked: 166 snd_dg00x_stream_lock_release(dg00x); 167 return err; 168 } 169 170 static int pcm_close(struct snd_pcm_substream *substream) 171 { 172 struct snd_dg00x *dg00x = substream->private_data; 173 174 snd_dg00x_stream_lock_release(dg00x); 175 176 return 0; 177 } 178 179 static int pcm_hw_params(struct snd_pcm_substream *substream, 180 struct snd_pcm_hw_params *hw_params) 181 { 182 struct snd_dg00x *dg00x = substream->private_data; 183 int err = 0; 184 185 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) { 186 unsigned int rate = params_rate(hw_params); 187 unsigned int frames_per_period = params_period_size(hw_params); 188 unsigned int frames_per_buffer = params_buffer_size(hw_params); 189 190 guard(mutex)(&dg00x->mutex); 191 err = snd_dg00x_stream_reserve_duplex(dg00x, rate, 192 frames_per_period, frames_per_buffer); 193 if (err >= 0) 194 ++dg00x->substreams_counter; 195 } 196 197 return err; 198 } 199 200 static int pcm_hw_free(struct snd_pcm_substream *substream) 201 { 202 struct snd_dg00x *dg00x = substream->private_data; 203 204 guard(mutex)(&dg00x->mutex); 205 206 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN) 207 --dg00x->substreams_counter; 208 209 snd_dg00x_stream_stop_duplex(dg00x); 210 211 return 0; 212 } 213 214 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 215 { 216 struct snd_dg00x *dg00x = substream->private_data; 217 int err; 218 219 guard(mutex)(&dg00x->mutex); 220 221 err = snd_dg00x_stream_start_duplex(dg00x); 222 if (err >= 0) 223 amdtp_stream_pcm_prepare(&dg00x->tx_stream); 224 225 return err; 226 } 227 228 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 229 { 230 struct snd_dg00x *dg00x = substream->private_data; 231 int err; 232 233 guard(mutex)(&dg00x->mutex); 234 235 err = snd_dg00x_stream_start_duplex(dg00x); 236 if (err >= 0) { 237 amdtp_stream_pcm_prepare(&dg00x->rx_stream); 238 amdtp_dot_reset(&dg00x->rx_stream); 239 } 240 241 return err; 242 } 243 244 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 245 { 246 struct snd_dg00x *dg00x = substream->private_data; 247 248 switch (cmd) { 249 case SNDRV_PCM_TRIGGER_START: 250 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream); 251 break; 252 case SNDRV_PCM_TRIGGER_STOP: 253 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL); 254 break; 255 default: 256 return -EINVAL; 257 } 258 259 return 0; 260 } 261 262 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 263 { 264 struct snd_dg00x *dg00x = substream->private_data; 265 266 switch (cmd) { 267 case SNDRV_PCM_TRIGGER_START: 268 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream); 269 break; 270 case SNDRV_PCM_TRIGGER_STOP: 271 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL); 272 break; 273 default: 274 return -EINVAL; 275 } 276 277 return 0; 278 } 279 280 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) 281 { 282 struct snd_dg00x *dg00x = sbstrm->private_data; 283 284 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->tx_stream); 285 } 286 287 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) 288 { 289 struct snd_dg00x *dg00x = sbstrm->private_data; 290 291 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->rx_stream); 292 } 293 294 static int pcm_capture_ack(struct snd_pcm_substream *substream) 295 { 296 struct snd_dg00x *dg00x = substream->private_data; 297 298 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->tx_stream); 299 } 300 301 static int pcm_playback_ack(struct snd_pcm_substream *substream) 302 { 303 struct snd_dg00x *dg00x = substream->private_data; 304 305 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->rx_stream); 306 } 307 308 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x) 309 { 310 static const struct snd_pcm_ops capture_ops = { 311 .open = pcm_open, 312 .close = pcm_close, 313 .hw_params = pcm_hw_params, 314 .hw_free = pcm_hw_free, 315 .prepare = pcm_capture_prepare, 316 .trigger = pcm_capture_trigger, 317 .pointer = pcm_capture_pointer, 318 .ack = pcm_capture_ack, 319 }; 320 static const struct snd_pcm_ops playback_ops = { 321 .open = pcm_open, 322 .close = pcm_close, 323 .hw_params = pcm_hw_params, 324 .hw_free = pcm_hw_free, 325 .prepare = pcm_playback_prepare, 326 .trigger = pcm_playback_trigger, 327 .pointer = pcm_playback_pointer, 328 .ack = pcm_playback_ack, 329 }; 330 struct snd_pcm *pcm; 331 int err; 332 333 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm); 334 if (err < 0) 335 return err; 336 337 pcm->private_data = dg00x; 338 pcm->nonatomic = true; 339 snprintf(pcm->name, sizeof(pcm->name), 340 "%s PCM", dg00x->card->shortname); 341 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 342 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 343 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); 344 345 return 0; 346 } 347