1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Routines for control of the AK4114 via I2C and 4-wire serial interface 4 * IEC958 (S/PDIF) receiver by Asahi Kasei 5 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 6 */ 7 8 #include <linux/slab.h> 9 #include <linux/delay.h> 10 #include <linux/module.h> 11 #include <sound/core.h> 12 #include <sound/control.h> 13 #include <sound/pcm.h> 14 #include <sound/ak4114.h> 15 #include <sound/asoundef.h> 16 #include <sound/info.h> 17 18 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 19 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei"); 20 MODULE_LICENSE("GPL"); 21 22 #define AK4114_ADDR 0x00 /* fixed address */ 23 24 static void ak4114_stats(struct work_struct *work); 25 static void ak4114_init_regs(struct ak4114 *chip); 26 27 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val) 28 { 29 ak4114->write(ak4114->private_data, reg, val); 30 if (reg <= AK4114_REG_INT1_MASK) 31 ak4114->regmap[reg] = val; 32 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) 33 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val; 34 } 35 36 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg) 37 { 38 return ak4114->read(ak4114->private_data, reg); 39 } 40 41 static void snd_ak4114_free(struct ak4114 *chip) 42 { 43 atomic_inc(&chip->wq_processing); /* don't schedule new work */ 44 cancel_delayed_work_sync(&chip->work); 45 kfree(chip); 46 } 47 48 static int snd_ak4114_dev_free(struct snd_device *device) 49 { 50 struct ak4114 *chip = device->device_data; 51 snd_ak4114_free(chip); 52 return 0; 53 } 54 55 int snd_ak4114_create(struct snd_card *card, 56 ak4114_read_t *read, ak4114_write_t *write, 57 const unsigned char pgm[6], const unsigned char txcsb[5], 58 void *private_data, struct ak4114 **r_ak4114) 59 { 60 struct ak4114 *chip; 61 int err = 0; 62 unsigned char reg; 63 static const struct snd_device_ops ops = { 64 .dev_free = snd_ak4114_dev_free, 65 }; 66 67 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 68 if (chip == NULL) 69 return -ENOMEM; 70 spin_lock_init(&chip->lock); 71 chip->card = card; 72 chip->read = read; 73 chip->write = write; 74 chip->private_data = private_data; 75 INIT_DELAYED_WORK(&chip->work, ak4114_stats); 76 atomic_set(&chip->wq_processing, 0); 77 mutex_init(&chip->reinit_mutex); 78 79 for (reg = 0; reg < 6; reg++) 80 chip->regmap[reg] = pgm[reg]; 81 for (reg = 0; reg < 5; reg++) 82 chip->txcsb[reg] = txcsb[reg]; 83 84 ak4114_init_regs(chip); 85 86 chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT); 87 chip->rcs1 = reg_read(chip, AK4114_REG_RCS1); 88 89 err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops); 90 if (err < 0) 91 goto __fail; 92 93 if (r_ak4114) 94 *r_ak4114 = chip; 95 return 0; 96 97 __fail: 98 snd_ak4114_free(chip); 99 return err; 100 } 101 EXPORT_SYMBOL(snd_ak4114_create); 102 103 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val) 104 { 105 if (reg <= AK4114_REG_INT1_MASK) 106 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val); 107 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) 108 reg_write(chip, reg, 109 (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val); 110 } 111 EXPORT_SYMBOL(snd_ak4114_reg_write); 112 113 static void ak4114_init_regs(struct ak4114 *chip) 114 { 115 unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg; 116 117 /* bring the chip to reset state and powerdown state */ 118 reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN)); 119 udelay(200); 120 /* release reset, but leave powerdown */ 121 reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN); 122 udelay(200); 123 for (reg = 1; reg < 6; reg++) 124 reg_write(chip, reg, chip->regmap[reg]); 125 for (reg = 0; reg < 5; reg++) 126 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]); 127 /* release powerdown, everything is initialized now */ 128 reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN); 129 } 130 131 void snd_ak4114_reinit(struct ak4114 *chip) 132 { 133 if (atomic_inc_return(&chip->wq_processing) == 1) 134 cancel_delayed_work_sync(&chip->work); 135 scoped_guard(mutex, &chip->reinit_mutex) { 136 ak4114_init_regs(chip); 137 } 138 /* bring up statistics / event queing */ 139 if (atomic_dec_and_test(&chip->wq_processing)) 140 schedule_delayed_work(&chip->work, HZ / 10); 141 } 142 EXPORT_SYMBOL(snd_ak4114_reinit); 143 144 static unsigned int external_rate(unsigned char rcs1) 145 { 146 switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) { 147 case AK4114_FS_32000HZ: return 32000; 148 case AK4114_FS_44100HZ: return 44100; 149 case AK4114_FS_48000HZ: return 48000; 150 case AK4114_FS_88200HZ: return 88200; 151 case AK4114_FS_96000HZ: return 96000; 152 case AK4114_FS_176400HZ: return 176400; 153 case AK4114_FS_192000HZ: return 192000; 154 default: return 0; 155 } 156 } 157 158 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol, 159 struct snd_ctl_elem_info *uinfo) 160 { 161 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 162 uinfo->count = 1; 163 uinfo->value.integer.min = 0; 164 uinfo->value.integer.max = LONG_MAX; 165 return 0; 166 } 167 168 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol, 169 struct snd_ctl_elem_value *ucontrol) 170 { 171 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 172 173 guard(spinlock_irq)(&chip->lock); 174 ucontrol->value.integer.value[0] = 175 chip->errors[kcontrol->private_value]; 176 chip->errors[kcontrol->private_value] = 0; 177 return 0; 178 } 179 180 #define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info 181 182 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol, 183 struct snd_ctl_elem_value *ucontrol) 184 { 185 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 186 unsigned char reg = kcontrol->private_value & 0xff; 187 unsigned char bit = (kcontrol->private_value >> 8) & 0xff; 188 unsigned char inv = (kcontrol->private_value >> 31) & 1; 189 190 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv; 191 return 0; 192 } 193 194 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol, 195 struct snd_ctl_elem_info *uinfo) 196 { 197 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 198 uinfo->count = 1; 199 uinfo->value.integer.min = 0; 200 uinfo->value.integer.max = 192000; 201 return 0; 202 } 203 204 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol, 205 struct snd_ctl_elem_value *ucontrol) 206 { 207 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 208 209 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1)); 210 return 0; 211 } 212 213 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 214 { 215 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 216 uinfo->count = 1; 217 return 0; 218 } 219 220 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol, 221 struct snd_ctl_elem_value *ucontrol) 222 { 223 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 224 unsigned i; 225 226 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++) 227 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i); 228 return 0; 229 } 230 231 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol, 232 struct snd_ctl_elem_value *ucontrol) 233 { 234 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 235 unsigned i; 236 237 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) 238 ucontrol->value.iec958.status[i] = chip->txcsb[i]; 239 return 0; 240 } 241 242 static int snd_ak4114_spdif_playback_put(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_TXCSB_SIZE; i++) 249 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]); 250 return 0; 251 } 252 253 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 254 { 255 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 256 uinfo->count = 1; 257 return 0; 258 } 259 260 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol, 261 struct snd_ctl_elem_value *ucontrol) 262 { 263 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE); 264 return 0; 265 } 266 267 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 268 { 269 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 270 uinfo->value.integer.min = 0; 271 uinfo->value.integer.max = 0xffff; 272 uinfo->count = 4; 273 return 0; 274 } 275 276 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol, 277 struct snd_ctl_elem_value *ucontrol) 278 { 279 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 280 unsigned short tmp; 281 282 ucontrol->value.integer.value[0] = 0xf8f2; 283 ucontrol->value.integer.value[1] = 0x4e1f; 284 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8); 285 ucontrol->value.integer.value[2] = tmp; 286 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8); 287 ucontrol->value.integer.value[3] = tmp; 288 return 0; 289 } 290 291 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 292 { 293 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; 294 uinfo->count = AK4114_REG_QSUB_SIZE; 295 return 0; 296 } 297 298 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol, 299 struct snd_ctl_elem_value *ucontrol) 300 { 301 struct ak4114 *chip = snd_kcontrol_chip(kcontrol); 302 unsigned i; 303 304 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++) 305 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i); 306 return 0; 307 } 308 309 /* Don't forget to change AK4114_CONTROLS define!!! */ 310 static const struct snd_kcontrol_new snd_ak4114_iec958_controls[] = { 311 { 312 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 313 .name = "IEC958 Parity Errors", 314 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 315 .info = snd_ak4114_in_error_info, 316 .get = snd_ak4114_in_error_get, 317 .private_value = AK4114_PARITY_ERRORS, 318 }, 319 { 320 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 321 .name = "IEC958 V-Bit Errors", 322 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 323 .info = snd_ak4114_in_error_info, 324 .get = snd_ak4114_in_error_get, 325 .private_value = AK4114_V_BIT_ERRORS, 326 }, 327 { 328 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 329 .name = "IEC958 C-CRC Errors", 330 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 331 .info = snd_ak4114_in_error_info, 332 .get = snd_ak4114_in_error_get, 333 .private_value = AK4114_CCRC_ERRORS, 334 }, 335 { 336 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 337 .name = "IEC958 Q-CRC Errors", 338 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 339 .info = snd_ak4114_in_error_info, 340 .get = snd_ak4114_in_error_get, 341 .private_value = AK4114_QCRC_ERRORS, 342 }, 343 { 344 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 345 .name = "IEC958 External Rate", 346 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 347 .info = snd_ak4114_rate_info, 348 .get = snd_ak4114_rate_get, 349 }, 350 { 351 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 352 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK), 353 .access = SNDRV_CTL_ELEM_ACCESS_READ, 354 .info = snd_ak4114_spdif_mask_info, 355 .get = snd_ak4114_spdif_mask_get, 356 }, 357 { 358 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 359 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT), 360 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 361 .info = snd_ak4114_spdif_info, 362 .get = snd_ak4114_spdif_playback_get, 363 .put = snd_ak4114_spdif_playback_put, 364 }, 365 { 366 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 367 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK), 368 .access = SNDRV_CTL_ELEM_ACCESS_READ, 369 .info = snd_ak4114_spdif_mask_info, 370 .get = snd_ak4114_spdif_mask_get, 371 }, 372 { 373 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 374 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT), 375 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 376 .info = snd_ak4114_spdif_info, 377 .get = snd_ak4114_spdif_get, 378 }, 379 { 380 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 381 .name = "IEC958 Preamble Capture Default", 382 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 383 .info = snd_ak4114_spdif_pinfo, 384 .get = snd_ak4114_spdif_pget, 385 }, 386 { 387 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 388 .name = "IEC958 Q-subcode Capture Default", 389 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 390 .info = snd_ak4114_spdif_qinfo, 391 .get = snd_ak4114_spdif_qget, 392 }, 393 { 394 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 395 .name = "IEC958 Audio", 396 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 397 .info = snd_ak4114_in_bit_info, 398 .get = snd_ak4114_in_bit_get, 399 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0, 400 }, 401 { 402 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 403 .name = "IEC958 Non-PCM Bitstream", 404 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 405 .info = snd_ak4114_in_bit_info, 406 .get = snd_ak4114_in_bit_get, 407 .private_value = (6<<8) | AK4114_REG_RCS0, 408 }, 409 { 410 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 411 .name = "IEC958 DTS Bitstream", 412 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 413 .info = snd_ak4114_in_bit_info, 414 .get = snd_ak4114_in_bit_get, 415 .private_value = (3<<8) | AK4114_REG_RCS0, 416 }, 417 { 418 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 419 .name = "IEC958 PPL Lock Status", 420 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 421 .info = snd_ak4114_in_bit_info, 422 .get = snd_ak4114_in_bit_get, 423 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0, 424 } 425 }; 426 427 428 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry, 429 struct snd_info_buffer *buffer) 430 { 431 struct ak4114 *ak4114 = entry->private_data; 432 int reg, val; 433 /* all ak4114 registers 0x00 - 0x1f */ 434 for (reg = 0; reg < 0x20; reg++) { 435 val = reg_read(ak4114, reg); 436 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val); 437 } 438 } 439 440 static void snd_ak4114_proc_init(struct ak4114 *ak4114) 441 { 442 snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114, 443 snd_ak4114_proc_regs_read); 444 } 445 446 int snd_ak4114_build(struct ak4114 *ak4114, 447 struct snd_pcm_substream *ply_substream, 448 struct snd_pcm_substream *cap_substream) 449 { 450 struct snd_kcontrol *kctl; 451 unsigned int idx; 452 int err; 453 454 if (snd_BUG_ON(!cap_substream)) 455 return -EINVAL; 456 ak4114->playback_substream = ply_substream; 457 ak4114->capture_substream = cap_substream; 458 for (idx = 0; idx < AK4114_CONTROLS; idx++) { 459 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114); 460 if (kctl == NULL) 461 return -ENOMEM; 462 if (strstr(kctl->id.name, "Playback")) { 463 if (ply_substream == NULL) { 464 snd_ctl_free_one(kctl); 465 ak4114->kctls[idx] = NULL; 466 continue; 467 } 468 kctl->id.device = ply_substream->pcm->device; 469 kctl->id.subdevice = ply_substream->number; 470 } else { 471 kctl->id.device = cap_substream->pcm->device; 472 kctl->id.subdevice = cap_substream->number; 473 } 474 err = snd_ctl_add(ak4114->card, kctl); 475 if (err < 0) 476 return err; 477 ak4114->kctls[idx] = kctl; 478 } 479 snd_ak4114_proc_init(ak4114); 480 /* trigger workq */ 481 schedule_delayed_work(&ak4114->work, HZ / 10); 482 return 0; 483 } 484 EXPORT_SYMBOL(snd_ak4114_build); 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 EXPORT_SYMBOL(snd_ak4114_external_rate); 541 542 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags) 543 { 544 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL; 545 unsigned long _flags; 546 int res = 0; 547 unsigned char rcs0, rcs1; 548 unsigned char c0, c1; 549 550 rcs1 = reg_read(ak4114, AK4114_REG_RCS1); 551 if (flags & AK4114_CHECK_NO_STAT) 552 goto __rate; 553 rcs0 = reg_read(ak4114, AK4114_REG_RCS0); 554 scoped_guard(spinlock_irqsave, &ak4114->lock) { 555 if (rcs0 & AK4114_PAR) 556 ak4114->errors[AK4114_PARITY_ERRORS]++; 557 if (rcs1 & AK4114_V) 558 ak4114->errors[AK4114_V_BIT_ERRORS]++; 559 if (rcs1 & AK4114_CCRC) 560 ak4114->errors[AK4114_CCRC_ERRORS]++; 561 if (rcs1 & AK4114_QCRC) 562 ak4114->errors[AK4114_QCRC_ERRORS]++; 563 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^ 564 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)); 565 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0); 566 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT); 567 ak4114->rcs1 = rcs1; 568 } 569 570 ak4114_notify(ak4114, rcs0, rcs1, c0, c1); 571 if (ak4114->change_callback && (c0 | c1) != 0) 572 ak4114->change_callback(ak4114, c0, c1); 573 574 __rate: 575 /* compare rate */ 576 res = external_rate(rcs1); 577 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) { 578 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags); 579 if (snd_pcm_running(ak4114->capture_substream)) { 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 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors); 588 589 static void ak4114_stats(struct work_struct *work) 590 { 591 struct ak4114 *chip = container_of(work, struct ak4114, work.work); 592 593 if (atomic_inc_return(&chip->wq_processing) == 1) 594 snd_ak4114_check_rate_and_errors(chip, chip->check_flags); 595 if (atomic_dec_and_test(&chip->wq_processing)) 596 schedule_delayed_work(&chip->work, HZ / 10); 597 } 598 599 #ifdef CONFIG_PM 600 void snd_ak4114_suspend(struct ak4114 *chip) 601 { 602 atomic_inc(&chip->wq_processing); /* don't schedule new work */ 603 cancel_delayed_work_sync(&chip->work); 604 } 605 EXPORT_SYMBOL(snd_ak4114_suspend); 606 607 void snd_ak4114_resume(struct ak4114 *chip) 608 { 609 atomic_dec(&chip->wq_processing); 610 snd_ak4114_reinit(chip); 611 } 612 EXPORT_SYMBOL(snd_ak4114_resume); 613 #endif 614