1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * fireworks_pcm.c - a part of driver for Fireworks based devices 4 * 5 * Copyright (c) 2009-2010 Clemens Ladisch 6 * Copyright (c) 2013-2014 Takashi Sakamoto 7 */ 8 #include "./fireworks.h" 9 10 /* 11 * NOTE: 12 * Fireworks changes its AMDTP channels for PCM data according to its sampling 13 * rate. There are three modes. Here _XX is either _rx or _tx. 14 * 0: 32.0- 48.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels applied 15 * 1: 88.2- 96.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_2x applied 16 * 2: 176.4-192.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_4x applied 17 * 18 * The number of PCM channels for analog input and output are always fixed but 19 * the number of PCM channels for digital input and output are differed. 20 * 21 * Additionally, according to "AudioFire Owner's Manual Version 2.2", in some 22 * model, the number of PCM channels for digital input has more restriction 23 * depending on which digital interface is selected. 24 * - S/PDIF coaxial and optical : use input 1-2 25 * - ADAT optical at 32.0-48.0 kHz : use input 1-8 26 * - ADAT optical at 88.2-96.0 kHz : use input 1-4 (S/MUX format) 27 * 28 * The data in AMDTP channels for blank PCM channels are zero. 29 */ 30 static const unsigned int freq_table[] = { 31 /* multiplier mode 0 */ 32 [0] = 32000, 33 [1] = 44100, 34 [2] = 48000, 35 /* multiplier mode 1 */ 36 [3] = 88200, 37 [4] = 96000, 38 /* multiplier mode 2 */ 39 [5] = 176400, 40 [6] = 192000, 41 }; 42 43 static inline unsigned int 44 get_multiplier_mode_with_index(unsigned int index) 45 { 46 return ((int)index - 1) / 2; 47 } 48 49 int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode) 50 { 51 unsigned int i; 52 53 for (i = 0; i < ARRAY_SIZE(freq_table); i++) { 54 if (freq_table[i] == sampling_rate) { 55 *mode = get_multiplier_mode_with_index(i); 56 return 0; 57 } 58 } 59 60 return -EINVAL; 61 } 62 63 static int 64 hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) 65 { 66 unsigned int *pcm_channels = rule->private; 67 struct snd_interval *r = 68 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 69 const struct snd_interval *c = 70 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); 71 struct snd_interval t = { 72 .min = UINT_MAX, .max = 0, .integer = 1 73 }; 74 unsigned int i, mode; 75 76 for (i = 0; i < ARRAY_SIZE(freq_table); i++) { 77 mode = get_multiplier_mode_with_index(i); 78 if (!snd_interval_test(c, pcm_channels[mode])) 79 continue; 80 81 t.min = min(t.min, freq_table[i]); 82 t.max = max(t.max, freq_table[i]); 83 } 84 85 return snd_interval_refine(r, &t); 86 } 87 88 static int 89 hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) 90 { 91 unsigned int *pcm_channels = rule->private; 92 struct snd_interval *c = 93 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 94 const struct snd_interval *r = 95 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); 96 struct snd_interval t = { 97 .min = UINT_MAX, .max = 0, .integer = 1 98 }; 99 unsigned int i, mode; 100 101 for (i = 0; i < ARRAY_SIZE(freq_table); i++) { 102 mode = get_multiplier_mode_with_index(i); 103 if (!snd_interval_test(r, freq_table[i])) 104 continue; 105 106 t.min = min(t.min, pcm_channels[mode]); 107 t.max = max(t.max, pcm_channels[mode]); 108 } 109 110 return snd_interval_refine(c, &t); 111 } 112 113 static void 114 limit_channels(struct snd_pcm_hardware *hw, unsigned int *pcm_channels) 115 { 116 unsigned int i, mode; 117 118 hw->channels_min = UINT_MAX; 119 hw->channels_max = 0; 120 121 for (i = 0; i < ARRAY_SIZE(freq_table); i++) { 122 mode = get_multiplier_mode_with_index(i); 123 if (pcm_channels[mode] == 0) 124 continue; 125 126 hw->channels_min = min(hw->channels_min, pcm_channels[mode]); 127 hw->channels_max = max(hw->channels_max, pcm_channels[mode]); 128 } 129 } 130 131 static int 132 pcm_init_hw_params(struct snd_efw *efw, 133 struct snd_pcm_substream *substream) 134 { 135 struct snd_pcm_runtime *runtime = substream->runtime; 136 struct amdtp_stream *s; 137 unsigned int *pcm_channels; 138 int err; 139 140 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 141 runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS; 142 s = &efw->tx_stream; 143 pcm_channels = efw->pcm_capture_channels; 144 } else { 145 runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS; 146 s = &efw->rx_stream; 147 pcm_channels = efw->pcm_playback_channels; 148 } 149 150 /* limit rates */ 151 runtime->hw.rates = efw->supported_sampling_rate, 152 snd_pcm_limit_hw_rates(runtime); 153 154 limit_channels(&runtime->hw, pcm_channels); 155 156 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 157 hw_rule_channels, pcm_channels, 158 SNDRV_PCM_HW_PARAM_RATE, -1); 159 if (err < 0) 160 goto end; 161 162 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 163 hw_rule_rate, pcm_channels, 164 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 165 if (err < 0) 166 goto end; 167 168 err = amdtp_am824_add_pcm_hw_constraints(s, runtime); 169 end: 170 return err; 171 } 172 173 static int pcm_open(struct snd_pcm_substream *substream) 174 { 175 struct snd_efw *efw = substream->private_data; 176 unsigned int sampling_rate; 177 enum snd_efw_clock_source clock_source; 178 int err; 179 180 err = snd_efw_stream_lock_try(efw); 181 if (err < 0) 182 goto end; 183 184 err = pcm_init_hw_params(efw, substream); 185 if (err < 0) 186 goto err_locked; 187 188 err = snd_efw_command_get_clock_source(efw, &clock_source); 189 if (err < 0) 190 goto err_locked; 191 192 /* 193 * When source of clock is not internal or any PCM streams are running, 194 * available sampling rate is limited at current sampling rate. 195 */ 196 if ((clock_source != SND_EFW_CLOCK_SOURCE_INTERNAL) || 197 amdtp_stream_pcm_running(&efw->tx_stream) || 198 amdtp_stream_pcm_running(&efw->rx_stream)) { 199 err = snd_efw_command_get_sampling_rate(efw, &sampling_rate); 200 if (err < 0) 201 goto err_locked; 202 substream->runtime->hw.rate_min = sampling_rate; 203 substream->runtime->hw.rate_max = sampling_rate; 204 } 205 206 snd_pcm_set_sync(substream); 207 end: 208 return err; 209 err_locked: 210 snd_efw_stream_lock_release(efw); 211 return err; 212 } 213 214 static int pcm_close(struct snd_pcm_substream *substream) 215 { 216 struct snd_efw *efw = substream->private_data; 217 snd_efw_stream_lock_release(efw); 218 return 0; 219 } 220 221 static int pcm_capture_hw_params(struct snd_pcm_substream *substream, 222 struct snd_pcm_hw_params *hw_params) 223 { 224 struct snd_efw *efw = substream->private_data; 225 int err; 226 227 err = snd_pcm_lib_alloc_vmalloc_buffer(substream, 228 params_buffer_bytes(hw_params)); 229 if (err < 0) 230 return err; 231 232 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 233 mutex_lock(&efw->mutex); 234 efw->capture_substreams++; 235 mutex_unlock(&efw->mutex); 236 } 237 238 return 0; 239 } 240 static int pcm_playback_hw_params(struct snd_pcm_substream *substream, 241 struct snd_pcm_hw_params *hw_params) 242 { 243 struct snd_efw *efw = substream->private_data; 244 int err; 245 246 err = snd_pcm_lib_alloc_vmalloc_buffer(substream, 247 params_buffer_bytes(hw_params)); 248 if (err < 0) 249 return err; 250 251 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 252 mutex_lock(&efw->mutex); 253 efw->playback_substreams++; 254 mutex_unlock(&efw->mutex); 255 } 256 257 return 0; 258 } 259 260 static int pcm_capture_hw_free(struct snd_pcm_substream *substream) 261 { 262 struct snd_efw *efw = substream->private_data; 263 264 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { 265 mutex_lock(&efw->mutex); 266 efw->capture_substreams--; 267 mutex_unlock(&efw->mutex); 268 } 269 270 snd_efw_stream_stop_duplex(efw); 271 272 return snd_pcm_lib_free_vmalloc_buffer(substream); 273 } 274 static int pcm_playback_hw_free(struct snd_pcm_substream *substream) 275 { 276 struct snd_efw *efw = substream->private_data; 277 278 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { 279 mutex_lock(&efw->mutex); 280 efw->playback_substreams--; 281 mutex_unlock(&efw->mutex); 282 } 283 284 snd_efw_stream_stop_duplex(efw); 285 286 return snd_pcm_lib_free_vmalloc_buffer(substream); 287 } 288 289 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 290 { 291 struct snd_efw *efw = substream->private_data; 292 struct snd_pcm_runtime *runtime = substream->runtime; 293 int err; 294 295 err = snd_efw_stream_start_duplex(efw, runtime->rate); 296 if (err >= 0) 297 amdtp_stream_pcm_prepare(&efw->tx_stream); 298 299 return err; 300 } 301 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 302 { 303 struct snd_efw *efw = substream->private_data; 304 struct snd_pcm_runtime *runtime = substream->runtime; 305 int err; 306 307 err = snd_efw_stream_start_duplex(efw, runtime->rate); 308 if (err >= 0) 309 amdtp_stream_pcm_prepare(&efw->rx_stream); 310 311 return err; 312 } 313 314 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 315 { 316 struct snd_efw *efw = substream->private_data; 317 318 switch (cmd) { 319 case SNDRV_PCM_TRIGGER_START: 320 amdtp_stream_pcm_trigger(&efw->tx_stream, substream); 321 break; 322 case SNDRV_PCM_TRIGGER_STOP: 323 amdtp_stream_pcm_trigger(&efw->tx_stream, NULL); 324 break; 325 default: 326 return -EINVAL; 327 } 328 329 return 0; 330 } 331 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 332 { 333 struct snd_efw *efw = substream->private_data; 334 335 switch (cmd) { 336 case SNDRV_PCM_TRIGGER_START: 337 amdtp_stream_pcm_trigger(&efw->rx_stream, substream); 338 break; 339 case SNDRV_PCM_TRIGGER_STOP: 340 amdtp_stream_pcm_trigger(&efw->rx_stream, NULL); 341 break; 342 default: 343 return -EINVAL; 344 } 345 346 return 0; 347 } 348 349 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) 350 { 351 struct snd_efw *efw = sbstrm->private_data; 352 return amdtp_stream_pcm_pointer(&efw->tx_stream); 353 } 354 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) 355 { 356 struct snd_efw *efw = sbstrm->private_data; 357 return amdtp_stream_pcm_pointer(&efw->rx_stream); 358 } 359 360 static int pcm_capture_ack(struct snd_pcm_substream *substream) 361 { 362 struct snd_efw *efw = substream->private_data; 363 364 return amdtp_stream_pcm_ack(&efw->tx_stream); 365 } 366 367 static int pcm_playback_ack(struct snd_pcm_substream *substream) 368 { 369 struct snd_efw *efw = substream->private_data; 370 371 return amdtp_stream_pcm_ack(&efw->rx_stream); 372 } 373 374 int snd_efw_create_pcm_devices(struct snd_efw *efw) 375 { 376 static const struct snd_pcm_ops capture_ops = { 377 .open = pcm_open, 378 .close = pcm_close, 379 .ioctl = snd_pcm_lib_ioctl, 380 .hw_params = pcm_capture_hw_params, 381 .hw_free = pcm_capture_hw_free, 382 .prepare = pcm_capture_prepare, 383 .trigger = pcm_capture_trigger, 384 .pointer = pcm_capture_pointer, 385 .ack = pcm_capture_ack, 386 .page = snd_pcm_lib_get_vmalloc_page, 387 }; 388 static const struct snd_pcm_ops playback_ops = { 389 .open = pcm_open, 390 .close = pcm_close, 391 .ioctl = snd_pcm_lib_ioctl, 392 .hw_params = pcm_playback_hw_params, 393 .hw_free = pcm_playback_hw_free, 394 .prepare = pcm_playback_prepare, 395 .trigger = pcm_playback_trigger, 396 .pointer = pcm_playback_pointer, 397 .ack = pcm_playback_ack, 398 .page = snd_pcm_lib_get_vmalloc_page, 399 }; 400 struct snd_pcm *pcm; 401 int err; 402 403 err = snd_pcm_new(efw->card, efw->card->driver, 0, 1, 1, &pcm); 404 if (err < 0) 405 goto end; 406 407 pcm->private_data = efw; 408 snprintf(pcm->name, sizeof(pcm->name), "%s PCM", efw->card->shortname); 409 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 410 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 411 end: 412 return err; 413 } 414 415