1 /* 2 * oxfw_pcm.c - a part of driver for OXFW970/971 based devices 3 * 4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de> 5 * Licensed under the terms of the GNU General Public License, version 2. 6 */ 7 8 #include "oxfw.h" 9 10 static int hw_rule_rate(struct snd_pcm_hw_params *params, 11 struct snd_pcm_hw_rule *rule) 12 { 13 u8 **formats = rule->private; 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 struct snd_oxfw_stream_formation formation; 22 int i, err; 23 24 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 25 if (formats[i] == NULL) 26 continue; 27 28 err = snd_oxfw_stream_parse_format(formats[i], &formation); 29 if (err < 0) 30 continue; 31 if (!snd_interval_test(c, formation.pcm)) 32 continue; 33 34 t.min = min(t.min, formation.rate); 35 t.max = max(t.max, formation.rate); 36 37 } 38 return snd_interval_refine(r, &t); 39 } 40 41 static int hw_rule_channels(struct snd_pcm_hw_params *params, 42 struct snd_pcm_hw_rule *rule) 43 { 44 u8 **formats = rule->private; 45 struct snd_interval *c = 46 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 47 const struct snd_interval *r = 48 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); 49 struct snd_oxfw_stream_formation formation; 50 int i, j, err; 51 unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0}; 52 53 count = 0; 54 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 55 if (formats[i] == NULL) 56 break; 57 58 err = snd_oxfw_stream_parse_format(formats[i], &formation); 59 if (err < 0) 60 continue; 61 if (!snd_interval_test(r, formation.rate)) 62 continue; 63 if (list[count] == formation.pcm) 64 continue; 65 66 for (j = 0; j < ARRAY_SIZE(list); j++) { 67 if (list[j] == formation.pcm) 68 break; 69 } 70 if (j == ARRAY_SIZE(list)) { 71 list[count] = formation.pcm; 72 if (++count == ARRAY_SIZE(list)) 73 break; 74 } 75 } 76 77 return snd_interval_list(c, count, list, 0); 78 } 79 80 static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats) 81 { 82 struct snd_oxfw_stream_formation formation; 83 int i, err; 84 85 hw->channels_min = UINT_MAX; 86 hw->channels_max = 0; 87 88 hw->rate_min = UINT_MAX; 89 hw->rate_max = 0; 90 hw->rates = 0; 91 92 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 93 if (formats[i] == NULL) 94 break; 95 96 err = snd_oxfw_stream_parse_format(formats[i], &formation); 97 if (err < 0) 98 continue; 99 100 hw->channels_min = min(hw->channels_min, formation.pcm); 101 hw->channels_max = max(hw->channels_max, formation.pcm); 102 103 hw->rate_min = min(hw->rate_min, formation.rate); 104 hw->rate_max = max(hw->rate_max, formation.rate); 105 hw->rates |= snd_pcm_rate_to_rate_bit(formation.rate); 106 } 107 } 108 109 static void limit_period_and_buffer(struct snd_pcm_hardware *hw) 110 { 111 hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */ 112 hw->periods_max = UINT_MAX; 113 114 hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */ 115 116 /* Just to prevent from allocating much pages. */ 117 hw->period_bytes_max = hw->period_bytes_min * 2048; 118 hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min; 119 } 120 121 static int init_hw_params(struct snd_oxfw *oxfw, 122 struct snd_pcm_substream *substream) 123 { 124 struct snd_pcm_runtime *runtime = substream->runtime; 125 u8 **formats; 126 struct amdtp_stream *stream; 127 int err; 128 129 runtime->hw.info = SNDRV_PCM_INFO_BATCH | 130 SNDRV_PCM_INFO_BLOCK_TRANSFER | 131 SNDRV_PCM_INFO_INTERLEAVED | 132 SNDRV_PCM_INFO_JOINT_DUPLEX | 133 SNDRV_PCM_INFO_MMAP | 134 SNDRV_PCM_INFO_MMAP_VALID; 135 136 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 137 runtime->hw.formats = AMDTP_IN_PCM_FORMAT_BITS; 138 stream = &oxfw->tx_stream; 139 formats = oxfw->tx_stream_formats; 140 } else { 141 runtime->hw.formats = AMDTP_OUT_PCM_FORMAT_BITS; 142 stream = &oxfw->rx_stream; 143 formats = oxfw->rx_stream_formats; 144 } 145 146 limit_channels_and_rates(&runtime->hw, formats); 147 limit_period_and_buffer(&runtime->hw); 148 149 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 150 hw_rule_channels, formats, 151 SNDRV_PCM_HW_PARAM_RATE, -1); 152 if (err < 0) 153 goto end; 154 155 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 156 hw_rule_rate, formats, 157 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 158 if (err < 0) 159 goto end; 160 161 err = amdtp_stream_add_pcm_hw_constraints(stream, runtime); 162 end: 163 return err; 164 } 165 166 static int limit_to_current_params(struct snd_pcm_substream *substream) 167 { 168 struct snd_oxfw *oxfw = substream->private_data; 169 struct snd_oxfw_stream_formation formation; 170 enum avc_general_plug_dir dir; 171 int err; 172 173 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 174 dir = AVC_GENERAL_PLUG_DIR_OUT; 175 else 176 dir = AVC_GENERAL_PLUG_DIR_IN; 177 178 err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); 179 if (err < 0) 180 goto end; 181 182 substream->runtime->hw.channels_min = formation.pcm; 183 substream->runtime->hw.channels_max = formation.pcm; 184 substream->runtime->hw.rate_min = formation.rate; 185 substream->runtime->hw.rate_max = formation.rate; 186 end: 187 return err; 188 } 189 190 static int pcm_open(struct snd_pcm_substream *substream) 191 { 192 struct snd_oxfw *oxfw = substream->private_data; 193 int err; 194 195 err = snd_oxfw_stream_lock_try(oxfw); 196 if (err < 0) 197 goto end; 198 199 err = init_hw_params(oxfw, substream); 200 if (err < 0) 201 goto err_locked; 202 203 /* 204 * When any PCM streams are already running, the available sampling 205 * rate is limited at current value. 206 */ 207 if (amdtp_stream_pcm_running(&oxfw->tx_stream) || 208 amdtp_stream_pcm_running(&oxfw->rx_stream)) { 209 err = limit_to_current_params(substream); 210 if (err < 0) 211 goto end; 212 } 213 214 snd_pcm_set_sync(substream); 215 end: 216 return err; 217 err_locked: 218 snd_oxfw_stream_lock_release(oxfw); 219 return err; 220 } 221 222 static int pcm_close(struct snd_pcm_substream *substream) 223 { 224 struct snd_oxfw *oxfw = substream->private_data; 225 226 snd_oxfw_stream_lock_release(oxfw); 227 return 0; 228 } 229 230 static int pcm_capture_hw_params(struct snd_pcm_substream *substream, 231 struct snd_pcm_hw_params *hw_params) 232 { 233 struct snd_oxfw *oxfw = substream->private_data; 234 235 236 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 237 mutex_lock(&oxfw->mutex); 238 oxfw->capture_substreams++; 239 mutex_unlock(&oxfw->mutex); 240 } 241 242 amdtp_stream_set_pcm_format(&oxfw->tx_stream, params_format(hw_params)); 243 244 return snd_pcm_lib_alloc_vmalloc_buffer(substream, 245 params_buffer_bytes(hw_params)); 246 } 247 static int pcm_playback_hw_params(struct snd_pcm_substream *substream, 248 struct snd_pcm_hw_params *hw_params) 249 { 250 struct snd_oxfw *oxfw = substream->private_data; 251 252 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { 253 mutex_lock(&oxfw->mutex); 254 oxfw->playback_substreams++; 255 mutex_unlock(&oxfw->mutex); 256 } 257 258 amdtp_stream_set_pcm_format(&oxfw->rx_stream, params_format(hw_params)); 259 260 return snd_pcm_lib_alloc_vmalloc_buffer(substream, 261 params_buffer_bytes(hw_params)); 262 } 263 264 static int pcm_capture_hw_free(struct snd_pcm_substream *substream) 265 { 266 struct snd_oxfw *oxfw = substream->private_data; 267 268 mutex_lock(&oxfw->mutex); 269 270 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 271 oxfw->capture_substreams--; 272 273 snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream); 274 275 mutex_unlock(&oxfw->mutex); 276 277 return snd_pcm_lib_free_vmalloc_buffer(substream); 278 } 279 static int pcm_playback_hw_free(struct snd_pcm_substream *substream) 280 { 281 struct snd_oxfw *oxfw = substream->private_data; 282 283 mutex_lock(&oxfw->mutex); 284 285 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 286 oxfw->playback_substreams--; 287 288 snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream); 289 290 mutex_unlock(&oxfw->mutex); 291 292 return snd_pcm_lib_free_vmalloc_buffer(substream); 293 } 294 295 static int pcm_capture_prepare(struct snd_pcm_substream *substream) 296 { 297 struct snd_oxfw *oxfw = substream->private_data; 298 struct snd_pcm_runtime *runtime = substream->runtime; 299 int err; 300 301 mutex_lock(&oxfw->mutex); 302 err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream, 303 runtime->rate, runtime->channels); 304 mutex_unlock(&oxfw->mutex); 305 if (err < 0) 306 goto end; 307 308 amdtp_stream_pcm_prepare(&oxfw->tx_stream); 309 end: 310 return err; 311 } 312 static int pcm_playback_prepare(struct snd_pcm_substream *substream) 313 { 314 struct snd_oxfw *oxfw = substream->private_data; 315 struct snd_pcm_runtime *runtime = substream->runtime; 316 int err; 317 318 mutex_lock(&oxfw->mutex); 319 err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->rx_stream, 320 runtime->rate, runtime->channels); 321 mutex_unlock(&oxfw->mutex); 322 if (err < 0) 323 goto end; 324 325 amdtp_stream_pcm_prepare(&oxfw->rx_stream); 326 end: 327 return err; 328 } 329 330 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) 331 { 332 struct snd_oxfw *oxfw = substream->private_data; 333 struct snd_pcm_substream *pcm; 334 335 switch (cmd) { 336 case SNDRV_PCM_TRIGGER_START: 337 pcm = substream; 338 break; 339 case SNDRV_PCM_TRIGGER_STOP: 340 pcm = NULL; 341 break; 342 default: 343 return -EINVAL; 344 } 345 amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm); 346 return 0; 347 } 348 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) 349 { 350 struct snd_oxfw *oxfw = substream->private_data; 351 struct snd_pcm_substream *pcm; 352 353 switch (cmd) { 354 case SNDRV_PCM_TRIGGER_START: 355 pcm = substream; 356 break; 357 case SNDRV_PCM_TRIGGER_STOP: 358 pcm = NULL; 359 break; 360 default: 361 return -EINVAL; 362 } 363 amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm); 364 return 0; 365 } 366 367 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm) 368 { 369 struct snd_oxfw *oxfw = sbstm->private_data; 370 371 return amdtp_stream_pcm_pointer(&oxfw->tx_stream); 372 } 373 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm) 374 { 375 struct snd_oxfw *oxfw = sbstm->private_data; 376 377 return amdtp_stream_pcm_pointer(&oxfw->rx_stream); 378 } 379 380 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw) 381 { 382 static struct snd_pcm_ops capture_ops = { 383 .open = pcm_open, 384 .close = pcm_close, 385 .ioctl = snd_pcm_lib_ioctl, 386 .hw_params = pcm_capture_hw_params, 387 .hw_free = pcm_capture_hw_free, 388 .prepare = pcm_capture_prepare, 389 .trigger = pcm_capture_trigger, 390 .pointer = pcm_capture_pointer, 391 .page = snd_pcm_lib_get_vmalloc_page, 392 .mmap = snd_pcm_lib_mmap_vmalloc, 393 }; 394 static struct snd_pcm_ops playback_ops = { 395 .open = pcm_open, 396 .close = pcm_close, 397 .ioctl = snd_pcm_lib_ioctl, 398 .hw_params = pcm_playback_hw_params, 399 .hw_free = pcm_playback_hw_free, 400 .prepare = pcm_playback_prepare, 401 .trigger = pcm_playback_trigger, 402 .pointer = pcm_playback_pointer, 403 .page = snd_pcm_lib_get_vmalloc_page, 404 .mmap = snd_pcm_lib_mmap_vmalloc, 405 }; 406 struct snd_pcm *pcm; 407 unsigned int cap = 0; 408 int err; 409 410 if (oxfw->has_output) 411 cap = 1; 412 413 err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm); 414 if (err < 0) 415 return err; 416 417 pcm->private_data = oxfw; 418 strcpy(pcm->name, oxfw->card->shortname); 419 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); 420 if (cap > 0) 421 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); 422 423 return 0; 424 } 425