1 /* 2 * digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family 3 * 4 * Copyright (c) 2014-2015 Takashi Sakamoto 5 * 6 * Licensed under the terms of the GNU General Public License, version 2. 7 */ 8 9 #include "digi00x.h" 10 11 static int hw_rule_rate(struct snd_pcm_hw_params *params, 12 struct snd_pcm_hw_rule *rule) 13 { 14 struct snd_interval *r = 15 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 16 const struct snd_interval *c = 17 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); 18 struct snd_interval t = { 19 .min = UINT_MAX, .max = 0, .integer = 1, 20 }; 21 unsigned int i; 22 23 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) { 24 if (!snd_interval_test(c, 25 snd_dg00x_stream_pcm_channels[i])) 26 continue; 27 28 t.min = min(t.min, snd_dg00x_stream_rates[i]); 29 t.max = max(t.max, snd_dg00x_stream_rates[i]); 30 } 31 32 return snd_interval_refine(r, &t); 33 } 34 35 static int hw_rule_channels(struct snd_pcm_hw_params *params, 36 struct snd_pcm_hw_rule *rule) 37 { 38 struct snd_interval *c = 39 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 40 const struct snd_interval *r = 41 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); 42 struct snd_interval t = { 43 .min = UINT_MAX, .max = 0, .integer = 1, 44 }; 45 unsigned int i; 46 47 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) { 48 if (!snd_interval_test(r, snd_dg00x_stream_rates[i])) 49 continue; 50 51 t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]); 52 t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]); 53 } 54 55 return snd_interval_refine(c, &t); 56 } 57 58 static int pcm_init_hw_params(struct snd_dg00x *dg00x, 59 struct snd_pcm_substream *substream) 60 { 61 struct snd_pcm_runtime *runtime = substream->runtime; 62 struct snd_pcm_hardware *hw = &runtime->hw; 63 struct amdtp_stream *s; 64 int err; 65 66 67 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 68 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; 69 s = &dg00x->tx_stream; 70 } else { 71 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; 72 s = &dg00x->rx_stream; 73 } 74 75 hw->channels_min = 10; 76 hw->channels_max = 18; 77 78 hw->rates = SNDRV_PCM_RATE_44100 | 79 SNDRV_PCM_RATE_48000 | 80 SNDRV_PCM_RATE_88200 | 81 SNDRV_PCM_RATE_96000; 82 snd_pcm_limit_hw_rates(runtime); 83 84 err = snd_pcm_hw_rule_add(substream->runtime, 0, 85 SNDRV_PCM_HW_PARAM_CHANNELS, 86 hw_rule_channels, NULL, 87 SNDRV_PCM_HW_PARAM_RATE, -1); 88 if (err < 0) 89 return err; 90 91 err = snd_pcm_hw_rule_add(substream->runtime, 0, 92 SNDRV_PCM_HW_PARAM_RATE, 93 hw_rule_rate, NULL, 94 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 95 if (err < 0) 96 return err; 97 98 return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime); 99 } 100 101 static int pcm_open(struct snd_pcm_substream *substream) 102 { 103 struct snd_dg00x *dg00x = substream->private_data; 104 enum snd_dg00x_clock clock; 105 bool detect; 106 unsigned int rate; 107 int err; 108 109 err = snd_dg00x_stream_lock_try(dg00x); 110 if (err < 0) 111 goto end; 112 113 err = pcm_init_hw_params(dg00x, substream); 114 if (err < 0) 115 goto err_locked; 116 117 /* Check current clock source. */ 118 err = snd_dg00x_stream_get_clock(dg00x, &clock); 119 if (err < 0) 120 goto err_locked; 121 if (clock != SND_DG00X_CLOCK_INTERNAL) { 122 err = snd_dg00x_stream_check_external_clock(dg00x, &detect); 123 if (err < 0) 124 goto err_locked; 125 if (!detect) { 126 err = -EBUSY; 127 goto err_locked; 128 } 129 } 130 131 if ((clock != SND_DG00X_CLOCK_INTERNAL) || 132 amdtp_stream_pcm_running(&dg00x->rx_stream) || 133 amdtp_stream_pcm_running(&dg00x->tx_stream)) { 134 err = snd_dg00x_stream_get_external_rate(dg00x, &rate); 135 if (err < 0) 136 goto err_locked; 137 substream->runtime->hw.rate_min = rate; 138 substream->runtime->hw.rate_max = rate; 139 } 140 141 snd_pcm_set_sync(substream); 142 end: 143 return err; 144 err_locked: 145 snd_dg00x_stream_lock_release(dg00x); 146 return err; 147 } 148 149 static int pcm_close(struct snd_pcm_substream *substream) 150 { 151 struct snd_dg00x *dg00x = substream->private_data; 152 153 snd_dg00x_stream_lock_release(dg00x); 154 155 return 0; 156 } 157 158 static int pcm_hw_params(struct snd_pcm_substream *substream, 159 struct snd_pcm_hw_params *hw_params) 160 { 161 struct snd_dg00x *dg00x = substream->private_data; 162 int err; 163 164 err = snd_pcm_lib_alloc_vmalloc_buffer(substream, 165 params_buffer_bytes(hw_params)); 166 if (err < 0) 167 return err; 168 169 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 170 unsigned int rate = params_rate(hw_params); 171 172 mutex_lock(&dg00x->mutex); 173 err = snd_dg00x_stream_reserve_duplex(dg00x, rate); 174 if (err >= 0) 175 ++dg00x->substreams_counter; 176 mutex_unlock(&dg00x->mutex); 177 } 178 179 return err; 180 } 181 182 static int pcm_hw_free(struct snd_pcm_substream *substream) 183 { 184 struct snd_dg00x *dg00x = substream->private_data; 185 186 mutex_lock(&dg00x->mutex); 187 188 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 189 --dg00x->substreams_counter; 190 191 snd_dg00x_stream_stop_duplex(dg00x); 192 193 mutex_unlock(&dg00x->mutex); 194 195 return snd_pcm_lib_free_vmalloc_buffer(substream); 196 } 197 198 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 199 { 200 struct snd_dg00x *dg00x = substream->private_data; 201 int err; 202 203 mutex_lock(&dg00x->mutex); 204 205 err = snd_dg00x_stream_start_duplex(dg00x); 206 if (err >= 0) 207 amdtp_stream_pcm_prepare(&dg00x->tx_stream); 208 209 mutex_unlock(&dg00x->mutex); 210 211 return err; 212 } 213 214 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 215 { 216 struct snd_dg00x *dg00x = substream->private_data; 217 int err; 218 219 mutex_lock(&dg00x->mutex); 220 221 err = snd_dg00x_stream_start_duplex(dg00x); 222 if (err >= 0) { 223 amdtp_stream_pcm_prepare(&dg00x->rx_stream); 224 amdtp_dot_reset(&dg00x->rx_stream); 225 } 226 227 mutex_unlock(&dg00x->mutex); 228 229 return err; 230 } 231 232 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 233 { 234 struct snd_dg00x *dg00x = substream->private_data; 235 236 switch (cmd) { 237 case SNDRV_PCM_TRIGGER_START: 238 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream); 239 break; 240 case SNDRV_PCM_TRIGGER_STOP: 241 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL); 242 break; 243 default: 244 return -EINVAL; 245 } 246 247 return 0; 248 } 249 250 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 251 { 252 struct snd_dg00x *dg00x = substream->private_data; 253 254 switch (cmd) { 255 case SNDRV_PCM_TRIGGER_START: 256 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream); 257 break; 258 case SNDRV_PCM_TRIGGER_STOP: 259 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL); 260 break; 261 default: 262 return -EINVAL; 263 } 264 265 return 0; 266 } 267 268 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) 269 { 270 struct snd_dg00x *dg00x = sbstrm->private_data; 271 272 return amdtp_stream_pcm_pointer(&dg00x->tx_stream); 273 } 274 275 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) 276 { 277 struct snd_dg00x *dg00x = sbstrm->private_data; 278 279 return amdtp_stream_pcm_pointer(&dg00x->rx_stream); 280 } 281 282 static int pcm_capture_ack(struct snd_pcm_substream *substream) 283 { 284 struct snd_dg00x *dg00x = substream->private_data; 285 286 return amdtp_stream_pcm_ack(&dg00x->tx_stream); 287 } 288 289 static int pcm_playback_ack(struct snd_pcm_substream *substream) 290 { 291 struct snd_dg00x *dg00x = substream->private_data; 292 293 return amdtp_stream_pcm_ack(&dg00x->rx_stream); 294 } 295 296 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x) 297 { 298 static const struct snd_pcm_ops capture_ops = { 299 .open = pcm_open, 300 .close = pcm_close, 301 .ioctl = snd_pcm_lib_ioctl, 302 .hw_params = pcm_hw_params, 303 .hw_free = pcm_hw_free, 304 .prepare = pcm_capture_prepare, 305 .trigger = pcm_capture_trigger, 306 .pointer = pcm_capture_pointer, 307 .ack = pcm_capture_ack, 308 .page = snd_pcm_lib_get_vmalloc_page, 309 }; 310 static const struct snd_pcm_ops playback_ops = { 311 .open = pcm_open, 312 .close = pcm_close, 313 .ioctl = snd_pcm_lib_ioctl, 314 .hw_params = pcm_hw_params, 315 .hw_free = pcm_hw_free, 316 .prepare = pcm_playback_prepare, 317 .trigger = pcm_playback_trigger, 318 .pointer = pcm_playback_pointer, 319 .ack = pcm_playback_ack, 320 .page = snd_pcm_lib_get_vmalloc_page, 321 }; 322 struct snd_pcm *pcm; 323 int err; 324 325 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm); 326 if (err < 0) 327 return err; 328 329 pcm->private_data = dg00x; 330 snprintf(pcm->name, sizeof(pcm->name), 331 "%s PCM", dg00x->card->shortname); 332 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 333 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 334 335 return 0; 336 } 337