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 rate; 139 140 err = snd_dg00x_stream_get_external_rate(dg00x, &rate); 141 if (err < 0) { 142 mutex_unlock(&dg00x->mutex); 143 goto err_locked; 144 } 145 substream->runtime->hw.rate_min = rate; 146 substream->runtime->hw.rate_max = rate; 147 148 if (frames_per_period > 0) { 149 err = snd_pcm_hw_constraint_minmax(substream->runtime, 150 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 151 frames_per_period, frames_per_period); 152 if (err < 0) { 153 mutex_unlock(&dg00x->mutex); 154 goto err_locked; 155 } 156 } 157 } 158 159 mutex_unlock(&dg00x->mutex); 160 161 snd_pcm_set_sync(substream); 162 163 return 0; 164 err_locked: 165 snd_dg00x_stream_lock_release(dg00x); 166 return err; 167 } 168 169 static int pcm_close(struct snd_pcm_substream *substream) 170 { 171 struct snd_dg00x *dg00x = substream->private_data; 172 173 snd_dg00x_stream_lock_release(dg00x); 174 175 return 0; 176 } 177 178 static int pcm_hw_params(struct snd_pcm_substream *substream, 179 struct snd_pcm_hw_params *hw_params) 180 { 181 struct snd_dg00x *dg00x = substream->private_data; 182 int err; 183 184 err = snd_pcm_lib_alloc_vmalloc_buffer(substream, 185 params_buffer_bytes(hw_params)); 186 if (err < 0) 187 return err; 188 189 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 190 unsigned int rate = params_rate(hw_params); 191 unsigned int frames_per_period = params_period_size(hw_params); 192 193 mutex_lock(&dg00x->mutex); 194 err = snd_dg00x_stream_reserve_duplex(dg00x, rate, 195 frames_per_period); 196 if (err >= 0) 197 ++dg00x->substreams_counter; 198 mutex_unlock(&dg00x->mutex); 199 } 200 201 return err; 202 } 203 204 static int pcm_hw_free(struct snd_pcm_substream *substream) 205 { 206 struct snd_dg00x *dg00x = substream->private_data; 207 208 mutex_lock(&dg00x->mutex); 209 210 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 211 --dg00x->substreams_counter; 212 213 snd_dg00x_stream_stop_duplex(dg00x); 214 215 mutex_unlock(&dg00x->mutex); 216 217 return snd_pcm_lib_free_vmalloc_buffer(substream); 218 } 219 220 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 221 { 222 struct snd_dg00x *dg00x = substream->private_data; 223 int err; 224 225 mutex_lock(&dg00x->mutex); 226 227 err = snd_dg00x_stream_start_duplex(dg00x); 228 if (err >= 0) 229 amdtp_stream_pcm_prepare(&dg00x->tx_stream); 230 231 mutex_unlock(&dg00x->mutex); 232 233 return err; 234 } 235 236 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 237 { 238 struct snd_dg00x *dg00x = substream->private_data; 239 int err; 240 241 mutex_lock(&dg00x->mutex); 242 243 err = snd_dg00x_stream_start_duplex(dg00x); 244 if (err >= 0) { 245 amdtp_stream_pcm_prepare(&dg00x->rx_stream); 246 amdtp_dot_reset(&dg00x->rx_stream); 247 } 248 249 mutex_unlock(&dg00x->mutex); 250 251 return err; 252 } 253 254 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 255 { 256 struct snd_dg00x *dg00x = substream->private_data; 257 258 switch (cmd) { 259 case SNDRV_PCM_TRIGGER_START: 260 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream); 261 break; 262 case SNDRV_PCM_TRIGGER_STOP: 263 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL); 264 break; 265 default: 266 return -EINVAL; 267 } 268 269 return 0; 270 } 271 272 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 273 { 274 struct snd_dg00x *dg00x = substream->private_data; 275 276 switch (cmd) { 277 case SNDRV_PCM_TRIGGER_START: 278 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream); 279 break; 280 case SNDRV_PCM_TRIGGER_STOP: 281 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL); 282 break; 283 default: 284 return -EINVAL; 285 } 286 287 return 0; 288 } 289 290 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) 291 { 292 struct snd_dg00x *dg00x = sbstrm->private_data; 293 294 return amdtp_stream_pcm_pointer(&dg00x->tx_stream); 295 } 296 297 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) 298 { 299 struct snd_dg00x *dg00x = sbstrm->private_data; 300 301 return amdtp_stream_pcm_pointer(&dg00x->rx_stream); 302 } 303 304 static int pcm_capture_ack(struct snd_pcm_substream *substream) 305 { 306 struct snd_dg00x *dg00x = substream->private_data; 307 308 return amdtp_stream_pcm_ack(&dg00x->tx_stream); 309 } 310 311 static int pcm_playback_ack(struct snd_pcm_substream *substream) 312 { 313 struct snd_dg00x *dg00x = substream->private_data; 314 315 return amdtp_stream_pcm_ack(&dg00x->rx_stream); 316 } 317 318 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x) 319 { 320 static const struct snd_pcm_ops capture_ops = { 321 .open = pcm_open, 322 .close = pcm_close, 323 .ioctl = snd_pcm_lib_ioctl, 324 .hw_params = pcm_hw_params, 325 .hw_free = pcm_hw_free, 326 .prepare = pcm_capture_prepare, 327 .trigger = pcm_capture_trigger, 328 .pointer = pcm_capture_pointer, 329 .ack = pcm_capture_ack, 330 .page = snd_pcm_lib_get_vmalloc_page, 331 }; 332 static const struct snd_pcm_ops playback_ops = { 333 .open = pcm_open, 334 .close = pcm_close, 335 .ioctl = snd_pcm_lib_ioctl, 336 .hw_params = pcm_hw_params, 337 .hw_free = pcm_hw_free, 338 .prepare = pcm_playback_prepare, 339 .trigger = pcm_playback_trigger, 340 .pointer = pcm_playback_pointer, 341 .ack = pcm_playback_ack, 342 .page = snd_pcm_lib_get_vmalloc_page, 343 }; 344 struct snd_pcm *pcm; 345 int err; 346 347 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm); 348 if (err < 0) 349 return err; 350 351 pcm->private_data = dg00x; 352 snprintf(pcm->name, sizeof(pcm->name), 353 "%s PCM", dg00x->card->shortname); 354 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 355 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 356 357 return 0; 358 } 359