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_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 unsigned int rate = params_rate(hw_params); 234 235 mutex_lock(&efw->mutex); 236 err = snd_efw_stream_reserve_duplex(efw, rate); 237 if (err >= 0) 238 ++efw->substreams_counter; 239 mutex_unlock(&efw->mutex); 240 } 241 242 return err; 243 } 244 245 static int pcm_hw_free(struct snd_pcm_substream *substream) 246 { 247 struct snd_efw *efw = substream->private_data; 248 249 mutex_lock(&efw->mutex); 250 251 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 252 --efw->substreams_counter; 253 254 snd_efw_stream_stop_duplex(efw); 255 256 mutex_unlock(&efw->mutex); 257 258 return snd_pcm_lib_free_vmalloc_buffer(substream); 259 } 260 261 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 262 { 263 struct snd_efw *efw = substream->private_data; 264 int err; 265 266 err = snd_efw_stream_start_duplex(efw); 267 if (err >= 0) 268 amdtp_stream_pcm_prepare(&efw->tx_stream); 269 270 return err; 271 } 272 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 273 { 274 struct snd_efw *efw = substream->private_data; 275 int err; 276 277 err = snd_efw_stream_start_duplex(efw); 278 if (err >= 0) 279 amdtp_stream_pcm_prepare(&efw->rx_stream); 280 281 return err; 282 } 283 284 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 285 { 286 struct snd_efw *efw = substream->private_data; 287 288 switch (cmd) { 289 case SNDRV_PCM_TRIGGER_START: 290 amdtp_stream_pcm_trigger(&efw->tx_stream, substream); 291 break; 292 case SNDRV_PCM_TRIGGER_STOP: 293 amdtp_stream_pcm_trigger(&efw->tx_stream, NULL); 294 break; 295 default: 296 return -EINVAL; 297 } 298 299 return 0; 300 } 301 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 302 { 303 struct snd_efw *efw = substream->private_data; 304 305 switch (cmd) { 306 case SNDRV_PCM_TRIGGER_START: 307 amdtp_stream_pcm_trigger(&efw->rx_stream, substream); 308 break; 309 case SNDRV_PCM_TRIGGER_STOP: 310 amdtp_stream_pcm_trigger(&efw->rx_stream, NULL); 311 break; 312 default: 313 return -EINVAL; 314 } 315 316 return 0; 317 } 318 319 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) 320 { 321 struct snd_efw *efw = sbstrm->private_data; 322 return amdtp_stream_pcm_pointer(&efw->tx_stream); 323 } 324 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) 325 { 326 struct snd_efw *efw = sbstrm->private_data; 327 return amdtp_stream_pcm_pointer(&efw->rx_stream); 328 } 329 330 static int pcm_capture_ack(struct snd_pcm_substream *substream) 331 { 332 struct snd_efw *efw = substream->private_data; 333 334 return amdtp_stream_pcm_ack(&efw->tx_stream); 335 } 336 337 static int pcm_playback_ack(struct snd_pcm_substream *substream) 338 { 339 struct snd_efw *efw = substream->private_data; 340 341 return amdtp_stream_pcm_ack(&efw->rx_stream); 342 } 343 344 int snd_efw_create_pcm_devices(struct snd_efw *efw) 345 { 346 static const struct snd_pcm_ops capture_ops = { 347 .open = pcm_open, 348 .close = pcm_close, 349 .ioctl = snd_pcm_lib_ioctl, 350 .hw_params = pcm_hw_params, 351 .hw_free = pcm_hw_free, 352 .prepare = pcm_capture_prepare, 353 .trigger = pcm_capture_trigger, 354 .pointer = pcm_capture_pointer, 355 .ack = pcm_capture_ack, 356 .page = snd_pcm_lib_get_vmalloc_page, 357 }; 358 static const struct snd_pcm_ops playback_ops = { 359 .open = pcm_open, 360 .close = pcm_close, 361 .ioctl = snd_pcm_lib_ioctl, 362 .hw_params = pcm_hw_params, 363 .hw_free = pcm_hw_free, 364 .prepare = pcm_playback_prepare, 365 .trigger = pcm_playback_trigger, 366 .pointer = pcm_playback_pointer, 367 .ack = pcm_playback_ack, 368 .page = snd_pcm_lib_get_vmalloc_page, 369 }; 370 struct snd_pcm *pcm; 371 int err; 372 373 err = snd_pcm_new(efw->card, efw->card->driver, 0, 1, 1, &pcm); 374 if (err < 0) 375 goto end; 376 377 pcm->private_data = efw; 378 snprintf(pcm->name, sizeof(pcm->name), "%s PCM", efw->card->shortname); 379 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 380 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 381 end: 382 return err; 383 } 384 385