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@perex.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 <linux/slab.h> 24 #include <linux/delay.h> 25 #include <sound/core.h> 26 #include <sound/control.h> 27 #include <sound/pcm.h> 28 #include <sound/ak4114.h> 29 #include <sound/asoundef.h> 30 31 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 32 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei"); 33 MODULE_LICENSE("GPL"); 34 35 #define AK4114_ADDR 0x00 /* fixed address */ 36 37 static void ak4114_stats(struct work_struct *work); 38 static void ak4114_init_regs(struct ak4114 *chip); 39 40 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val) 41 { 42 ak4114->write(ak4114->private_data, reg, val); 43 if (reg <= AK4114_REG_INT1_MASK) 44 ak4114->regmap[reg] = val; 45 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) 46 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val; 47 } 48 49 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg) 50 { 51 return ak4114->read(ak4114->private_data, reg); 52 } 53 54 #if 0 55 static void reg_dump(struct ak4114 *ak4114) 56 { 57 int i; 58 59 printk(KERN_DEBUG "AK4114 REG DUMP:\n"); 60 for (i = 0; i < 0x20; i++) 61 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < sizeof(ak4114->regmap) ? ak4114->regmap[i] : 0); 62 } 63 #endif 64 65 static void snd_ak4114_free(struct ak4114 *chip) 66 { 67 chip->init = 1; /* don't schedule new work */ 68 mb(); 69 cancel_delayed_work(&chip->work); 70 flush_scheduled_work(); 71 kfree(chip); 72 } 73 74 static int snd_ak4114_dev_free(struct snd_device *device) 75 { 76 struct ak4114 *chip = device->device_data; 77 snd_ak4114_free(chip); 78 return 0; 79 } 80 81 int snd_ak4114_create(struct snd_card *card, 82 ak4114_read_t *read, ak4114_write_t *write, 83 const unsigned char pgm[7], const unsigned char txcsb[5], 84 void *private_data, struct ak4114 **r_ak4114) 85 { 86 struct ak4114 *chip; 87 int err = 0; 88 unsigned char reg; 89 static struct snd_device_ops ops = { 90 .dev_free = snd_ak4114_dev_free, 91 }; 92 93 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 94 if (chip == NULL) 95 return -ENOMEM; 96 spin_lock_init(&chip->lock); 97 chip->card = card; 98 chip->read = read; 99 chip->write = write; 100 chip->private_data = private_data; 101 INIT_DELAYED_WORK(&chip->work, ak4114_stats); 102 103 for (reg = 0; reg < 7; reg++) 104 chip->regmap[reg] = pgm[reg]; 105 for (reg = 0; reg < 5; reg++) 106 chip->txcsb[reg] = txcsb[reg]; 107 108 ak4114_init_regs(chip); 109 110 chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT); 111 chip->rcs1 = reg_read(chip, AK4114_REG_RCS1); 112 113 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) 114 goto __fail; 115 116 if (r_ak4114) 117 *r_ak4114 = chip; 118 return 0; 119 120 __fail: 121 snd_ak4114_free(chip); 122 return err < 0 ? err : -EIO; 123 } 124 125 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val) 126 { 127 if (reg <= AK4114_REG_INT1_MASK) 128 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val); 129 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) 130 reg_write(chip, reg, 131 (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val); 132 } 133 134 static void ak4114_init_regs(struct ak4114 *chip) 135 { 136 unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg; 137 138 /* bring the chip to reset state and powerdown state */ 139 reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN)); 140 udelay(200); 141 /* release reset, but leave powerdown */ 142 reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN); 143 udelay(200); 144 for (reg = 1; reg < 7; reg++) 145 reg_write(chip, reg, chip->regmap[reg]); 146 for (reg = 0; reg < 5; reg++) 147 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]); 148 /* release powerdown, everything is initialized now */ 149 reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN); 150 } 151 152 void snd_ak4114_reinit(struct ak4114 *chip) 153 { 154 chip->init = 1; 155 mb(); 156 flush_scheduled_work(); 157 ak4114_init_regs(chip); 158 /* bring up statistics / event queing */ 159 chip->init = 0; 160 if (chip->kctls[0]) 161 schedule_delayed_work(&chip->work, HZ / 10); 162 } 163 164 static unsigned int external_rate(unsigned char rcs1) 165 { 166 switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) { 167 case AK4114_FS_32000HZ: return 32000; 168 case AK4114_FS_44100HZ: return 44100; 169 case AK4114_FS_48000HZ: return 48000; 170 case AK4114_FS_88200HZ: return 88200; 171 case AK4114_FS_96000HZ: return 96000; 172 case AK4114_FS_176400HZ: return 176400; 173 case AK4114_FS_192000HZ: return 192000; 174 default: return 0; 175 } 176 } 177 178 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol, 179 struct snd_ctl_elem_info *uinfo) 180 { 181 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 182 uinfo->count = 1; 183 uinfo->value.integer.min = 0; 184 uinfo->value.integer.max = LONG_MAX; 185 return 0; 186 } 187 188 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol, 189 struct snd_ctl_elem_value *ucontrol) 190 { 191 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 192 long *ptr; 193 194 spin_lock_irq(&chip->lock); 195 ptr = (long *)(((char *)chip) + kcontrol->private_value); 196 ucontrol->value.integer.value[0] = *ptr; 197 *ptr = 0; 198 spin_unlock_irq(&chip->lock); 199 return 0; 200 } 201 202 #define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info 203 204 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol, 205 struct snd_ctl_elem_value *ucontrol) 206 { 207 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 208 unsigned char reg = kcontrol->private_value & 0xff; 209 unsigned char bit = (kcontrol->private_value >> 8) & 0xff; 210 unsigned char inv = (kcontrol->private_value >> 31) & 1; 211 212 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv; 213 return 0; 214 } 215 216 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol, 217 struct snd_ctl_elem_info *uinfo) 218 { 219 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 220 uinfo->count = 1; 221 uinfo->value.integer.min = 0; 222 uinfo->value.integer.max = 192000; 223 return 0; 224 } 225 226 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol, 227 struct snd_ctl_elem_value *ucontrol) 228 { 229 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 230 231 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1)); 232 return 0; 233 } 234 235 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 236 { 237 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 238 uinfo->count = 1; 239 return 0; 240 } 241 242 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol, 243 struct snd_ctl_elem_value *ucontrol) 244 { 245 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 246 unsigned i; 247 248 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++) 249 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i); 250 return 0; 251 } 252 253 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol, 254 struct snd_ctl_elem_value *ucontrol) 255 { 256 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 257 unsigned i; 258 259 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) 260 ucontrol->value.iec958.status[i] = chip->txcsb[i]; 261 return 0; 262 } 263 264 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol, 265 struct snd_ctl_elem_value *ucontrol) 266 { 267 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 268 unsigned i; 269 270 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) 271 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]); 272 return 0; 273 } 274 275 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 276 { 277 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 278 uinfo->count = 1; 279 return 0; 280 } 281 282 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol, 283 struct snd_ctl_elem_value *ucontrol) 284 { 285 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE); 286 return 0; 287 } 288 289 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 290 { 291 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 292 uinfo->value.integer.min = 0; 293 uinfo->value.integer.max = 0xffff; 294 uinfo->count = 4; 295 return 0; 296 } 297 298 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol, 299 struct snd_ctl_elem_value *ucontrol) 300 { 301 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 302 unsigned short tmp; 303 304 ucontrol->value.integer.value[0] = 0xf8f2; 305 ucontrol->value.integer.value[1] = 0x4e1f; 306 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8); 307 ucontrol->value.integer.value[2] = tmp; 308 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8); 309 ucontrol->value.integer.value[3] = tmp; 310 return 0; 311 } 312 313 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 314 { 315 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; 316 uinfo->count = AK4114_REG_QSUB_SIZE; 317 return 0; 318 } 319 320 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol, 321 struct snd_ctl_elem_value *ucontrol) 322 { 323 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 324 unsigned i; 325 326 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++) 327 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i); 328 return 0; 329 } 330 331 /* Don't forget to change AK4114_CONTROLS define!!! */ 332 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = { 333 { 334 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 335 .name = "IEC958 Parity Errors", 336 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 337 .info = snd_ak4114_in_error_info, 338 .get = snd_ak4114_in_error_get, 339 .private_value = offsetof(struct ak4114, parity_errors), 340 }, 341 { 342 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 343 .name = "IEC958 V-Bit Errors", 344 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 345 .info = snd_ak4114_in_error_info, 346 .get = snd_ak4114_in_error_get, 347 .private_value = offsetof(struct ak4114, v_bit_errors), 348 }, 349 { 350 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 351 .name = "IEC958 C-CRC Errors", 352 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 353 .info = snd_ak4114_in_error_info, 354 .get = snd_ak4114_in_error_get, 355 .private_value = offsetof(struct ak4114, ccrc_errors), 356 }, 357 { 358 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 359 .name = "IEC958 Q-CRC Errors", 360 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 361 .info = snd_ak4114_in_error_info, 362 .get = snd_ak4114_in_error_get, 363 .private_value = offsetof(struct ak4114, qcrc_errors), 364 }, 365 { 366 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 367 .name = "IEC958 External Rate", 368 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 369 .info = snd_ak4114_rate_info, 370 .get = snd_ak4114_rate_get, 371 }, 372 { 373 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 374 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK), 375 .access = SNDRV_CTL_ELEM_ACCESS_READ, 376 .info = snd_ak4114_spdif_mask_info, 377 .get = snd_ak4114_spdif_mask_get, 378 }, 379 { 380 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 381 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT), 382 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 383 .info = snd_ak4114_spdif_info, 384 .get = snd_ak4114_spdif_playback_get, 385 .put = snd_ak4114_spdif_playback_put, 386 }, 387 { 388 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 389 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK), 390 .access = SNDRV_CTL_ELEM_ACCESS_READ, 391 .info = snd_ak4114_spdif_mask_info, 392 .get = snd_ak4114_spdif_mask_get, 393 }, 394 { 395 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 396 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT), 397 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 398 .info = snd_ak4114_spdif_info, 399 .get = snd_ak4114_spdif_get, 400 }, 401 { 402 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 403 .name = "IEC958 Preample Capture Default", 404 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 405 .info = snd_ak4114_spdif_pinfo, 406 .get = snd_ak4114_spdif_pget, 407 }, 408 { 409 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 410 .name = "IEC958 Q-subcode Capture Default", 411 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 412 .info = snd_ak4114_spdif_qinfo, 413 .get = snd_ak4114_spdif_qget, 414 }, 415 { 416 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 417 .name = "IEC958 Audio", 418 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 419 .info = snd_ak4114_in_bit_info, 420 .get = snd_ak4114_in_bit_get, 421 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0, 422 }, 423 { 424 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 425 .name = "IEC958 Non-PCM Bitstream", 426 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 427 .info = snd_ak4114_in_bit_info, 428 .get = snd_ak4114_in_bit_get, 429 .private_value = (6<<8) | AK4114_REG_RCS0, 430 }, 431 { 432 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 433 .name = "IEC958 DTS Bitstream", 434 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 435 .info = snd_ak4114_in_bit_info, 436 .get = snd_ak4114_in_bit_get, 437 .private_value = (3<<8) | AK4114_REG_RCS0, 438 }, 439 { 440 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 441 .name = "IEC958 PPL Lock Status", 442 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 443 .info = snd_ak4114_in_bit_info, 444 .get = snd_ak4114_in_bit_get, 445 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0, 446 } 447 }; 448 449 int snd_ak4114_build(struct ak4114 *ak4114, 450 struct snd_pcm_substream *ply_substream, 451 struct snd_pcm_substream *cap_substream) 452 { 453 struct snd_kcontrol *kctl; 454 unsigned int idx; 455 int err; 456 457 snd_assert(cap_substream, return -EINVAL); 458 ak4114->playback_substream = ply_substream; 459 ak4114->capture_substream = cap_substream; 460 for (idx = 0; idx < AK4114_CONTROLS; idx++) { 461 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114); 462 if (kctl == NULL) 463 return -ENOMEM; 464 if (strstr(kctl->id.name, "Playback")) { 465 if (ply_substream == NULL) { 466 snd_ctl_free_one(kctl); 467 ak4114->kctls[idx] = NULL; 468 continue; 469 } 470 kctl->id.device = ply_substream->pcm->device; 471 kctl->id.subdevice = ply_substream->number; 472 } else { 473 kctl->id.device = cap_substream->pcm->device; 474 kctl->id.subdevice = cap_substream->number; 475 } 476 err = snd_ctl_add(ak4114->card, kctl); 477 if (err < 0) 478 return err; 479 ak4114->kctls[idx] = kctl; 480 } 481 /* trigger workq */ 482 schedule_delayed_work(&ak4114->work, HZ / 10); 483 return 0; 484 } 485 486 /* notify kcontrols if any parameters are changed */ 487 static void ak4114_notify(struct ak4114 *ak4114, 488 unsigned char rcs0, unsigned char rcs1, 489 unsigned char c0, unsigned char c1) 490 { 491 if (!ak4114->kctls[0]) 492 return; 493 494 if (rcs0 & AK4114_PAR) 495 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 496 &ak4114->kctls[0]->id); 497 if (rcs0 & AK4114_V) 498 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 499 &ak4114->kctls[1]->id); 500 if (rcs1 & AK4114_CCRC) 501 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 502 &ak4114->kctls[2]->id); 503 if (rcs1 & AK4114_QCRC) 504 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 505 &ak4114->kctls[3]->id); 506 507 /* rate change */ 508 if (c1 & 0xf0) 509 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 510 &ak4114->kctls[4]->id); 511 512 if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT)) 513 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 514 &ak4114->kctls[9]->id); 515 if (c0 & AK4114_QINT) 516 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 517 &ak4114->kctls[10]->id); 518 519 if (c0 & AK4114_AUDION) 520 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 521 &ak4114->kctls[11]->id); 522 if (c0 & AK4114_AUTO) 523 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 524 &ak4114->kctls[12]->id); 525 if (c0 & AK4114_DTSCD) 526 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 527 &ak4114->kctls[13]->id); 528 if (c0 & AK4114_UNLCK) 529 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, 530 &ak4114->kctls[14]->id); 531 } 532 533 int snd_ak4114_external_rate(struct ak4114 *ak4114) 534 { 535 unsigned char rcs1; 536 537 rcs1 = reg_read(ak4114, AK4114_REG_RCS1); 538 return external_rate(rcs1); 539 } 540 541 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags) 542 { 543 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL; 544 unsigned long _flags; 545 int res = 0; 546 unsigned char rcs0, rcs1; 547 unsigned char c0, c1; 548 549 rcs1 = reg_read(ak4114, AK4114_REG_RCS1); 550 if (flags & AK4114_CHECK_NO_STAT) 551 goto __rate; 552 rcs0 = reg_read(ak4114, AK4114_REG_RCS0); 553 spin_lock_irqsave(&ak4114->lock, _flags); 554 if (rcs0 & AK4114_PAR) 555 ak4114->parity_errors++; 556 if (rcs1 & AK4114_V) 557 ak4114->v_bit_errors++; 558 if (rcs1 & AK4114_CCRC) 559 ak4114->ccrc_errors++; 560 if (rcs1 & AK4114_QCRC) 561 ak4114->qcrc_errors++; 562 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^ 563 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)); 564 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0); 565 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT); 566 ak4114->rcs1 = rcs1; 567 spin_unlock_irqrestore(&ak4114->lock, _flags); 568 569 ak4114_notify(ak4114, rcs0, rcs1, c0, c1); 570 if (ak4114->change_callback && (c0 | c1) != 0) 571 ak4114->change_callback(ak4114, c0, c1); 572 573 __rate: 574 /* compare rate */ 575 res = external_rate(rcs1); 576 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) { 577 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags); 578 if (snd_pcm_running(ak4114->capture_substream)) { 579 // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res); 580 snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING); 581 res = 1; 582 } 583 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags); 584 } 585 return res; 586 } 587 588 static void ak4114_stats(struct work_struct *work) 589 { 590 struct ak4114 *chip = container_of(work, struct ak4114, work.work); 591 592 if (!chip->init) 593 snd_ak4114_check_rate_and_errors(chip, 0); 594 595 schedule_delayed_work(&chip->work, HZ / 10); 596 } 597 598 EXPORT_SYMBOL(snd_ak4114_create); 599 EXPORT_SYMBOL(snd_ak4114_reg_write); 600 EXPORT_SYMBOL(snd_ak4114_reinit); 601 EXPORT_SYMBOL(snd_ak4114_build); 602 EXPORT_SYMBOL(snd_ak4114_external_rate); 603 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors); 604