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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Routines for control of the AK4114 via I2C and 4-wire serial interface4 * IEC958 (S/PDIF) receiver by Asahi Kasei5 * 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 18MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");19MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");20MODULE_LICENSE("GPL");21 22#define AK4114_ADDR 0x00 /* fixed address */23 24static void ak4114_stats(struct work_struct *work);25static void ak4114_init_regs(struct ak4114 *chip);26 27static 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 36static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)37{38 return ak4114->read(ak4114->private_data, reg);39}40 41static 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 48static 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 55int 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}101EXPORT_SYMBOL(snd_ak4114_create);102 103void 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}111EXPORT_SYMBOL(snd_ak4114_reg_write);112 113static 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 131void snd_ak4114_reinit(struct ak4114 *chip)132{133 if (atomic_inc_return(&chip->wq_processing) == 1)134 cancel_delayed_work_sync(&chip->work);135 mutex_lock(&chip->reinit_mutex);136 ak4114_init_regs(chip);137 mutex_unlock(&chip->reinit_mutex);138 /* bring up statistics / event queing */139 if (atomic_dec_and_test(&chip->wq_processing))140 schedule_delayed_work(&chip->work, HZ / 10);141}142EXPORT_SYMBOL(snd_ak4114_reinit);143 144static 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 158static 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 168static 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 spin_lock_irq(&chip->lock);174 ucontrol->value.integer.value[0] =175 chip->errors[kcontrol->private_value];176 chip->errors[kcontrol->private_value] = 0;177 spin_unlock_irq(&chip->lock);178 return 0;179}180 181#define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info182 183static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,184 struct snd_ctl_elem_value *ucontrol)185{186 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);187 unsigned char reg = kcontrol->private_value & 0xff;188 unsigned char bit = (kcontrol->private_value >> 8) & 0xff;189 unsigned char inv = (kcontrol->private_value >> 31) & 1;190 191 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;192 return 0;193}194 195static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,196 struct snd_ctl_elem_info *uinfo)197{198 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;199 uinfo->count = 1;200 uinfo->value.integer.min = 0;201 uinfo->value.integer.max = 192000;202 return 0;203}204 205static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,206 struct snd_ctl_elem_value *ucontrol)207{208 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);209 210 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));211 return 0;212}213 214static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)215{216 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;217 uinfo->count = 1;218 return 0;219}220 221static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,222 struct snd_ctl_elem_value *ucontrol)223{224 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);225 unsigned i;226 227 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)228 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);229 return 0;230}231 232static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,233 struct snd_ctl_elem_value *ucontrol)234{235 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);236 unsigned i;237 238 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)239 ucontrol->value.iec958.status[i] = chip->txcsb[i];240 return 0;241}242 243static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,244 struct snd_ctl_elem_value *ucontrol)245{246 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);247 unsigned i;248 249 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)250 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);251 return 0;252}253 254static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)255{256 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;257 uinfo->count = 1;258 return 0;259}260 261static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,262 struct snd_ctl_elem_value *ucontrol)263{264 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);265 return 0;266}267 268static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)269{270 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;271 uinfo->value.integer.min = 0;272 uinfo->value.integer.max = 0xffff;273 uinfo->count = 4;274 return 0;275}276 277static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,278 struct snd_ctl_elem_value *ucontrol)279{280 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);281 unsigned short tmp;282 283 ucontrol->value.integer.value[0] = 0xf8f2;284 ucontrol->value.integer.value[1] = 0x4e1f;285 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);286 ucontrol->value.integer.value[2] = tmp;287 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);288 ucontrol->value.integer.value[3] = tmp;289 return 0;290}291 292static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)293{294 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;295 uinfo->count = AK4114_REG_QSUB_SIZE;296 return 0;297}298 299static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,300 struct snd_ctl_elem_value *ucontrol)301{302 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);303 unsigned i;304 305 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)306 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);307 return 0;308}309 310/* Don't forget to change AK4114_CONTROLS define!!! */311static const struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {312{313 .iface = SNDRV_CTL_ELEM_IFACE_PCM,314 .name = "IEC958 Parity Errors",315 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,316 .info = snd_ak4114_in_error_info,317 .get = snd_ak4114_in_error_get,318 .private_value = AK4114_PARITY_ERRORS,319},320{321 .iface = SNDRV_CTL_ELEM_IFACE_PCM,322 .name = "IEC958 V-Bit Errors",323 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,324 .info = snd_ak4114_in_error_info,325 .get = snd_ak4114_in_error_get,326 .private_value = AK4114_V_BIT_ERRORS,327},328{329 .iface = SNDRV_CTL_ELEM_IFACE_PCM,330 .name = "IEC958 C-CRC Errors",331 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,332 .info = snd_ak4114_in_error_info,333 .get = snd_ak4114_in_error_get,334 .private_value = AK4114_CCRC_ERRORS,335},336{337 .iface = SNDRV_CTL_ELEM_IFACE_PCM,338 .name = "IEC958 Q-CRC Errors",339 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,340 .info = snd_ak4114_in_error_info,341 .get = snd_ak4114_in_error_get,342 .private_value = AK4114_QCRC_ERRORS,343},344{345 .iface = SNDRV_CTL_ELEM_IFACE_PCM,346 .name = "IEC958 External Rate",347 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,348 .info = snd_ak4114_rate_info,349 .get = snd_ak4114_rate_get,350},351{352 .iface = SNDRV_CTL_ELEM_IFACE_PCM,353 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),354 .access = SNDRV_CTL_ELEM_ACCESS_READ,355 .info = snd_ak4114_spdif_mask_info,356 .get = snd_ak4114_spdif_mask_get,357},358{359 .iface = SNDRV_CTL_ELEM_IFACE_PCM,360 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),361 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,362 .info = snd_ak4114_spdif_info,363 .get = snd_ak4114_spdif_playback_get,364 .put = snd_ak4114_spdif_playback_put,365},366{367 .iface = SNDRV_CTL_ELEM_IFACE_PCM,368 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),369 .access = SNDRV_CTL_ELEM_ACCESS_READ,370 .info = snd_ak4114_spdif_mask_info,371 .get = snd_ak4114_spdif_mask_get,372},373{374 .iface = SNDRV_CTL_ELEM_IFACE_PCM,375 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),376 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,377 .info = snd_ak4114_spdif_info,378 .get = snd_ak4114_spdif_get,379},380{381 .iface = SNDRV_CTL_ELEM_IFACE_PCM,382 .name = "IEC958 Preamble Capture Default",383 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,384 .info = snd_ak4114_spdif_pinfo,385 .get = snd_ak4114_spdif_pget,386},387{388 .iface = SNDRV_CTL_ELEM_IFACE_PCM,389 .name = "IEC958 Q-subcode Capture Default",390 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,391 .info = snd_ak4114_spdif_qinfo,392 .get = snd_ak4114_spdif_qget,393},394{395 .iface = SNDRV_CTL_ELEM_IFACE_PCM,396 .name = "IEC958 Audio",397 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,398 .info = snd_ak4114_in_bit_info,399 .get = snd_ak4114_in_bit_get,400 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,401},402{403 .iface = SNDRV_CTL_ELEM_IFACE_PCM,404 .name = "IEC958 Non-PCM Bitstream",405 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,406 .info = snd_ak4114_in_bit_info,407 .get = snd_ak4114_in_bit_get,408 .private_value = (6<<8) | AK4114_REG_RCS0,409},410{411 .iface = SNDRV_CTL_ELEM_IFACE_PCM,412 .name = "IEC958 DTS Bitstream",413 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,414 .info = snd_ak4114_in_bit_info,415 .get = snd_ak4114_in_bit_get,416 .private_value = (3<<8) | AK4114_REG_RCS0,417},418{419 .iface = SNDRV_CTL_ELEM_IFACE_PCM,420 .name = "IEC958 PPL Lock Status",421 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,422 .info = snd_ak4114_in_bit_info,423 .get = snd_ak4114_in_bit_get,424 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,425}426};427 428 429static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,430 struct snd_info_buffer *buffer)431{432 struct ak4114 *ak4114 = entry->private_data;433 int reg, val;434 /* all ak4114 registers 0x00 - 0x1f */435 for (reg = 0; reg < 0x20; reg++) {436 val = reg_read(ak4114, reg);437 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);438 }439}440 441static void snd_ak4114_proc_init(struct ak4114 *ak4114)442{443 snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114,444 snd_ak4114_proc_regs_read);445}446 447int snd_ak4114_build(struct ak4114 *ak4114,448 struct snd_pcm_substream *ply_substream,449 struct snd_pcm_substream *cap_substream)450{451 struct snd_kcontrol *kctl;452 unsigned int idx;453 int err;454 455 if (snd_BUG_ON(!cap_substream))456 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 snd_ak4114_proc_init(ak4114);481 /* trigger workq */482 schedule_delayed_work(&ak4114->work, HZ / 10);483 return 0;484}485EXPORT_SYMBOL(snd_ak4114_build);486 487/* notify kcontrols if any parameters are changed */488static void ak4114_notify(struct ak4114 *ak4114,489 unsigned char rcs0, unsigned char rcs1,490 unsigned char c0, unsigned char c1)491{492 if (!ak4114->kctls[0])493 return;494 495 if (rcs0 & AK4114_PAR)496 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,497 &ak4114->kctls[0]->id);498 if (rcs0 & AK4114_V)499 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,500 &ak4114->kctls[1]->id);501 if (rcs1 & AK4114_CCRC)502 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,503 &ak4114->kctls[2]->id);504 if (rcs1 & AK4114_QCRC)505 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,506 &ak4114->kctls[3]->id);507 508 /* rate change */509 if (c1 & 0xf0)510 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,511 &ak4114->kctls[4]->id);512 513 if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))514 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,515 &ak4114->kctls[9]->id);516 if (c0 & AK4114_QINT)517 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,518 &ak4114->kctls[10]->id);519 520 if (c0 & AK4114_AUDION)521 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,522 &ak4114->kctls[11]->id);523 if (c0 & AK4114_AUTO)524 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,525 &ak4114->kctls[12]->id);526 if (c0 & AK4114_DTSCD)527 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,528 &ak4114->kctls[13]->id);529 if (c0 & AK4114_UNLCK)530 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,531 &ak4114->kctls[14]->id);532}533 534int snd_ak4114_external_rate(struct ak4114 *ak4114)535{536 unsigned char rcs1;537 538 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);539 return external_rate(rcs1);540}541EXPORT_SYMBOL(snd_ak4114_external_rate);542 543int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)544{545 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;546 unsigned long _flags;547 int res = 0;548 unsigned char rcs0, rcs1;549 unsigned char c0, c1;550 551 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);552 if (flags & AK4114_CHECK_NO_STAT)553 goto __rate;554 rcs0 = reg_read(ak4114, AK4114_REG_RCS0);555 spin_lock_irqsave(&ak4114->lock, _flags);556 if (rcs0 & AK4114_PAR)557 ak4114->errors[AK4114_PARITY_ERRORS]++;558 if (rcs1 & AK4114_V)559 ak4114->errors[AK4114_V_BIT_ERRORS]++;560 if (rcs1 & AK4114_CCRC)561 ak4114->errors[AK4114_CCRC_ERRORS]++;562 if (rcs1 & AK4114_QCRC)563 ak4114->errors[AK4114_QCRC_ERRORS]++;564 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^565 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));566 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);567 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);568 ak4114->rcs1 = rcs1;569 spin_unlock_irqrestore(&ak4114->lock, _flags);570 571 ak4114_notify(ak4114, rcs0, rcs1, c0, c1);572 if (ak4114->change_callback && (c0 | c1) != 0)573 ak4114->change_callback(ak4114, c0, c1);574 575 __rate:576 /* compare rate */577 res = external_rate(rcs1);578 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {579 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);580 if (snd_pcm_running(ak4114->capture_substream)) {581 snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);582 res = 1;583 }584 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);585 }586 return res;587}588EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);589 590static void ak4114_stats(struct work_struct *work)591{592 struct ak4114 *chip = container_of(work, struct ak4114, work.work);593 594 if (atomic_inc_return(&chip->wq_processing) == 1)595 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);596 if (atomic_dec_and_test(&chip->wq_processing))597 schedule_delayed_work(&chip->work, HZ / 10);598}599 600#ifdef CONFIG_PM601void snd_ak4114_suspend(struct ak4114 *chip)602{603 atomic_inc(&chip->wq_processing); /* don't schedule new work */604 cancel_delayed_work_sync(&chip->work);605}606EXPORT_SYMBOL(snd_ak4114_suspend);607 608void snd_ak4114_resume(struct ak4114 *chip)609{610 atomic_dec(&chip->wq_processing);611 snd_ak4114_reinit(chip);612}613EXPORT_SYMBOL(snd_ak4114_resume);614#endif615