1/* 2 * Routines for control of the AK4114 via I2C and 4-wire serial interface 3 * IEC958 (S/PDIF) receiver by Asahi Kasei 4 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 5 * 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 23#include <sound/driver.h> 24#include <linux/slab.h> 25#include <linux/delay.h> 26#include <sound/core.h> 27#include <sound/control.h> 28#include <sound/pcm.h> 29#include <sound/ak4114.h> 30#include <sound/asoundef.h> 31 32MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); 33MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei"); 34MODULE_LICENSE("GPL"); 35 36#define AK4114_ADDR 0x00 /* fixed address */ 37 38static void ak4114_stats(struct work_struct *work); 39static void ak4114_init_regs(struct ak4114 *chip); 40 41static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val) 42{ 43 ak4114->write(ak4114->private_data, reg, val); 44 if (reg <= AK4114_REG_INT1_MASK) 45 ak4114->regmap[reg] = val; 46 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) 47 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val; 48} 49 50static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg) 51{ 52 return ak4114->read(ak4114->private_data, reg); 53} 54 55 56static void snd_ak4114_free(struct ak4114 *chip) 57{ 58 chip->init = 1; /* don't schedule new work */ 59 mb(); 60 cancel_delayed_work(&chip->work); 61 flush_scheduled_work(); 62 kfree(chip); 63} 64 65static int snd_ak4114_dev_free(struct snd_device *device) 66{ 67 struct ak4114 *chip = device->device_data; 68 snd_ak4114_free(chip); 69 return 0; 70} 71 72int snd_ak4114_create(struct snd_card *card, 73 ak4114_read_t *read, ak4114_write_t *write, 74 const unsigned char pgm[7], const unsigned char txcsb[5], 75 void *private_data, struct ak4114 **r_ak4114) 76{ 77 struct ak4114 *chip; 78 int err = 0; 79 unsigned char reg; 80 static struct snd_device_ops ops = { 81 .dev_free = snd_ak4114_dev_free, 82 }; 83 84 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 85 if (chip == NULL) 86 return -ENOMEM; 87 spin_lock_init(&chip->lock); 88 chip->card = card; 89 chip->read = read; 90 chip->write = write; 91 chip->private_data = private_data; 92 INIT_DELAYED_WORK(&chip->work, ak4114_stats); 93 94 for (reg = 0; reg < 7; reg++) 95 chip->regmap[reg] = pgm[reg]; 96 for (reg = 0; reg < 5; reg++) 97 chip->txcsb[reg] = txcsb[reg]; 98 99 ak4114_init_regs(chip); 100 101 chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT); 102 chip->rcs1 = reg_read(chip, AK4114_REG_RCS1); 103 104 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) 105 goto __fail; 106 107 if (r_ak4114) 108 *r_ak4114 = chip; 109 return 0; 110 111 __fail: 112 snd_ak4114_free(chip); 113 return err < 0 ? err : -EIO; 114} 115 116void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val) 117{ 118 if (reg <= AK4114_REG_INT1_MASK) 119 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val); 120 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) 121 reg_write(chip, reg, 122 (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val); 123} 124 125static void ak4114_init_regs(struct ak4114 *chip) 126{ 127 unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg; 128 129 /* bring the chip to reset state and powerdown state */ 130 reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN)); 131 udelay(200); 132 /* release reset, but leave powerdown */ 133 reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN); 134 udelay(200); 135 for (reg = 1; reg < 7; reg++) 136 reg_write(chip, reg, chip->regmap[reg]); 137 for (reg = 0; reg < 5; reg++) 138 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]); 139 /* release powerdown, everything is initialized now */ 140 reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN); 141} 142 143void snd_ak4114_reinit(struct ak4114 *chip) 144{ 145 chip->init = 1; 146 mb(); 147 flush_scheduled_work(); 148 ak4114_init_regs(chip); 149 /* bring up statistics / event queing */ 150 chip->init = 0; 151 if (chip->kctls[0]) 152 schedule_delayed_work(&chip->work, HZ / 10); 153} 154 155static unsigned int external_rate(unsigned char rcs1) 156{ 157 switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) { 158 case AK4114_FS_32000HZ: return 32000; 159 case AK4114_FS_44100HZ: return 44100; 160 case AK4114_FS_48000HZ: return 48000; 161 case AK4114_FS_88200HZ: return 88200; 162 case AK4114_FS_96000HZ: return 96000; 163 case AK4114_FS_176400HZ: return 176400; 164 case AK4114_FS_192000HZ: return 192000; 165 default: return 0; 166 } 167} 168 169static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol, 170 struct snd_ctl_elem_info *uinfo) 171{ 172 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 173 uinfo->count = 1; 174 uinfo->value.integer.min = 0; 175 uinfo->value.integer.max = LONG_MAX; 176 return 0; 177} 178 179static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol, 180 struct snd_ctl_elem_value *ucontrol) 181{ 182 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 183 long *ptr; 184 185 spin_lock_irq(&chip->lock); 186 ptr = (long *)(((char *)chip) + kcontrol->private_value); 187 ucontrol->value.integer.value[0] = *ptr; 188 *ptr = 0; 189 spin_unlock_irq(&chip->lock); 190 return 0; 191} 192 193static int snd_ak4114_in_bit_info(struct snd_kcontrol *kcontrol, 194 struct snd_ctl_elem_info *uinfo) 195{ 196 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 197 uinfo->count = 1; 198 uinfo->value.integer.min = 0; 199 uinfo->value.integer.max = 1; 200 return 0; 201} 202 203static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol, 204 struct snd_ctl_elem_value *ucontrol) 205{ 206 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 207 unsigned char reg = kcontrol->private_value & 0xff; 208 unsigned char bit = (kcontrol->private_value >> 8) & 0xff; 209 unsigned char inv = (kcontrol->private_value >> 31) & 1; 210 211 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv; 212 return 0; 213} 214 215static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol, 216 struct snd_ctl_elem_info *uinfo) 217{ 218 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 219 uinfo->count = 1; 220 uinfo->value.integer.min = 0; 221 uinfo->value.integer.max = 192000; 222 return 0; 223} 224 225static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol, 226 struct snd_ctl_elem_value *ucontrol) 227{ 228 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 229 230 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1)); 231 return 0; 232} 233 234static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 235{ 236 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 237 uinfo->count = 1; 238 return 0; 239} 240 241static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol, 242 struct snd_ctl_elem_value *ucontrol) 243{ 244 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 245 unsigned i; 246 247 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++) 248 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i); 249 return 0; 250} 251 252static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol, 253 struct snd_ctl_elem_value *ucontrol) 254{ 255 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 256 unsigned i; 257 258 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) 259 ucontrol->value.iec958.status[i] = chip->txcsb[i]; 260 return 0; 261} 262 263static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol, 264 struct snd_ctl_elem_value *ucontrol) 265{ 266 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 267 unsigned i; 268 269 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) 270 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]); 271 return 0; 272} 273 274static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 275{ 276 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 277 uinfo->count = 1; 278 return 0; 279} 280 281static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol, 282 struct snd_ctl_elem_value *ucontrol) 283{ 284 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE); 285 return 0; 286} 287 288static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 289{ 290 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 291 uinfo->value.integer.min = 0; 292 uinfo->value.integer.max = 0xffff; 293 uinfo->count = 4; 294 return 0; 295} 296 297static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol, 298 struct snd_ctl_elem_value *ucontrol) 299{ 300 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 301 unsigned short tmp; 302 303 ucontrol->value.integer.value[0] = 0xf8f2; 304 ucontrol->value.integer.value[1] = 0x4e1f; 305 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8); 306 ucontrol->value.integer.value[2] = tmp; 307 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8); 308 ucontrol->value.integer.value[3] = tmp; 309 return 0; 310} 311 312static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 313{ 314 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; 315 uinfo->count = AK4114_REG_QSUB_SIZE; 316 return 0; 317} 318 319static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol, 320 struct snd_ctl_elem_value *ucontrol) 321{ 322 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 323 unsigned i; 324 325 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++) 326 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i); 327 return 0; 328} 329 330/* Don't forget to change AK4114_CONTROLS define!!! */ 331static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = { 332{ 333 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 334 .name = "IEC958 Parity Errors", 335 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 336 .info = snd_ak4114_in_error_info, 337 .get = snd_ak4114_in_error_get, 338 .private_value = offsetof(struct ak4114, parity_errors), 339}, 340{ 341 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 342 .name = "IEC958 V-Bit Errors", 343 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 344 .info = snd_ak4114_in_error_info, 345 .get = snd_ak4114_in_error_get, 346 .private_value = offsetof(struct ak4114, v_bit_errors), 347}, 348{ 349 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 350 .name = "IEC958 C-CRC Errors", 351 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 352 .info = snd_ak4114_in_error_info, 353 .get = snd_ak4114_in_error_get, 354 .private_value = offsetof(struct ak4114, ccrc_errors), 355}, 356{ 357 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 358 .name = "IEC958 Q-CRC Errors", 359 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 360 .info = snd_ak4114_in_error_info, 361 .get = snd_ak4114_in_error_get, 362 .private_value = offsetof(struct ak4114, qcrc_errors), 363}, 364{ 365 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 366 .name = "IEC958 External Rate", 367 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 368 .info = snd_ak4114_rate_info, 369 .get = snd_ak4114_rate_get, 370}, 371{ 372 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 373 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK), 374 .access = SNDRV_CTL_ELEM_ACCESS_READ, 375 .info = snd_ak4114_spdif_mask_info, 376 .get = snd_ak4114_spdif_mask_get, 377}, 378{ 379 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 380 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT), 381 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 382 .info = snd_ak4114_spdif_info, 383 .get = snd_ak4114_spdif_playback_get, 384 .put = snd_ak4114_spdif_playback_put, 385}, 386{ 387 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 388 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK), 389 .access = SNDRV_CTL_ELEM_ACCESS_READ, 390 .info = snd_ak4114_spdif_mask_info, 391 .get = snd_ak4114_spdif_mask_get, 392}, 393{ 394 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 395 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT), 396 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 397 .info = snd_ak4114_spdif_info, 398 .get = snd_ak4114_spdif_get, 399}, 400{ 401 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 402 .name = "IEC958 Preample Capture Default", 403 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 404 .info = snd_ak4114_spdif_pinfo, 405 .get = snd_ak4114_spdif_pget, 406}, 407{ 408 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 409 .name = "IEC958 Q-subcode Capture Default", 410 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 411 .info = snd_ak4114_spdif_qinfo, 412 .get = snd_ak4114_spdif_qget, 413}, 414{ 415 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 416 .name = "IEC958 Audio", 417 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 418 .info = snd_ak4114_in_bit_info, 419 .get = snd_ak4114_in_bit_get, 420 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0, 421}, 422{ 423 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 424 .name = "IEC958 Non-PCM Bitstream", 425 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 426 .info = snd_ak4114_in_bit_info, 427 .get = snd_ak4114_in_bit_get, 428 .private_value = (6<<8) | AK4114_REG_RCS0, 429}, 430{ 431 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 432 .name = "IEC958 DTS Bitstream", 433 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 434 .info = snd_ak4114_in_bit_info, 435 .get = snd_ak4114_in_bit_get, 436 .private_value = (3<<8) | AK4114_REG_RCS0, 437}, 438{ 439 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 440 .name = "IEC958 PPL Lock Status", 441 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 442 .info = snd_ak4114_in_bit_info, 443 .get = snd_ak4114_in_bit_get, 444 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0, 445} 446}; 447 448int snd_ak4114_build(struct ak4114 *ak4114, 449 struct snd_pcm_substream *ply_substream, 450 struct snd_pcm_substream *cap_substream) 451{ 452 struct snd_kcontrol *kctl; 453 unsigned int idx; 454 int err; 455 456 snd_assert(cap_substream, return -EINVAL); 457 ak4114->playback_substream = ply_substream; 458 ak4114->capture_substream = cap_substream; 459 for (idx = 0; idx < AK4114_CONTROLS; idx++) { 460 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114); 461 if (kctl == NULL) 462 return -ENOMEM; 463 if (strstr(kctl->id.name, "Playback")) { 464 if (ply_substream == NULL) { 465 snd_ctl_free_one(kctl); 466 ak4114->kctls[idx] = NULL; 467 continue; 468 } 469 kctl->id.device = ply_substream->pcm->device; 470 kctl->id.subdevice = ply_substream->number; 471 } else { 472 kctl->id.device = cap_substream->pcm->device; 473 kctl->id.subdevice = cap_substream->number; 474 } 475 err = snd_ctl_add(ak4114->card, kctl); 476 if (err < 0) 477 return err; 478 ak4114->kctls[idx] = kctl; 479 } 480 /* trigger workq */ 481 schedule_delayed_work(&ak4114->work, HZ / 10); 482 return 0; 483} 484 485/* notify kcontrols if any parameters are changed */ 486static void ak4114_notify(struct ak4114 *ak4114, 487 unsigned char rcs0, unsigned char rcs1, 488 unsigned char c0, unsigned char c1) 489{ 490 if (!ak4114->kctls[0]) 491 return; 492 493 if (rcs0 & AK4114_PAR) 494 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 495 &ak4114->kctls[0]->id); 496 if (rcs0 & AK4114_V) 497 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 498 &ak4114->kctls[1]->id); 499 if (rcs1 & AK4114_CCRC) 500 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 501 &ak4114->kctls[2]->id); 502 if (rcs1 & AK4114_QCRC) 503 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 504 &ak4114->kctls[3]->id); 505 506 /* rate change */ 507 if (c1 & 0xf0) 508 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 509 &ak4114->kctls[4]->id); 510 511 if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT)) 512 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 513 &ak4114->kctls[9]->id); 514 if (c0 & AK4114_QINT) 515 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 516 &ak4114->kctls[10]->id); 517 518 if (c0 & AK4114_AUDION) 519 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 520 &ak4114->kctls[11]->id); 521 if (c0 & AK4114_AUTO) 522 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 523 &ak4114->kctls[12]->id); 524 if (c0 & AK4114_DTSCD) 525 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 526 &ak4114->kctls[13]->id); 527 if (c0 & AK4114_UNLCK) 528 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 529 &ak4114->kctls[14]->id); 530} 531 532int snd_ak4114_external_rate(struct ak4114 *ak4114) 533{ 534 unsigned char rcs1; 535 536 rcs1 = reg_read(ak4114, AK4114_REG_RCS1); 537 return external_rate(rcs1); 538} 539 540int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags) 541{ 542 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL; 543 unsigned long _flags; 544 int res = 0; 545 unsigned char rcs0, rcs1; 546 unsigned char c0, c1; 547 548 rcs1 = reg_read(ak4114, AK4114_REG_RCS1); 549 if (flags & AK4114_CHECK_NO_STAT) 550 goto __rate; 551 rcs0 = reg_read(ak4114, AK4114_REG_RCS0); 552 spin_lock_irqsave(&ak4114->lock, _flags); 553 if (rcs0 & AK4114_PAR) 554 ak4114->parity_errors++; 555 if (rcs1 & AK4114_V) 556 ak4114->v_bit_errors++; 557 if (rcs1 & AK4114_CCRC) 558 ak4114->ccrc_errors++; 559 if (rcs1 & AK4114_QCRC) 560 ak4114->qcrc_errors++; 561 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^ 562 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)); 563 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0); 564 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT); 565 ak4114->rcs1 = rcs1; 566 spin_unlock_irqrestore(&ak4114->lock, _flags); 567 568 ak4114_notify(ak4114, rcs0, rcs1, c0, c1); 569 if (ak4114->change_callback && (c0 | c1) != 0) 570 ak4114->change_callback(ak4114, c0, c1); 571 572 __rate: 573 /* compare rate */ 574 res = external_rate(rcs1); 575 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) { 576 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags); 577 if (snd_pcm_running(ak4114->capture_substream)) { 578 // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res); 579 snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING); 580 res = 1; 581 } 582 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags); 583 } 584 return res; 585} 586 587static void ak4114_stats(struct work_struct *work) 588{ 589 struct ak4114 *chip = container_of(work, struct ak4114, work.work); 590 591 if (!chip->init) 592 snd_ak4114_check_rate_and_errors(chip, 0); 593 594 schedule_delayed_work(&chip->work, HZ / 10); 595} 596 597EXPORT_SYMBOL(snd_ak4114_create); 598EXPORT_SYMBOL(snd_ak4114_reg_write); 599EXPORT_SYMBOL(snd_ak4114_reinit); 600EXPORT_SYMBOL(snd_ak4114_build); 601EXPORT_SYMBOL(snd_ak4114_external_rate); 602EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors); 603