diff options
Diffstat (limited to 'kernel/sound/i2c/other/ak4114.c')
| -rw-r--r-- | kernel/sound/i2c/other/ak4114.c | 642 |
1 files changed, 642 insertions, 0 deletions
diff --git a/kernel/sound/i2c/other/ak4114.c b/kernel/sound/i2c/other/ak4114.c new file mode 100644 index 000000000..5a4cf3fab --- /dev/null +++ b/kernel/sound/i2c/other/ak4114.c @@ -0,0 +1,642 @@ +/* + * Routines for control of the AK4114 via I2C and 4-wire serial interface + * IEC958 (S/PDIF) receiver by Asahi Kasei + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <sound/core.h> +#include <sound/control.h> +#include <sound/pcm.h> +#include <sound/ak4114.h> +#include <sound/asoundef.h> +#include <sound/info.h> + +MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); +MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei"); +MODULE_LICENSE("GPL"); + +#define AK4114_ADDR 0x00 /* fixed address */ + +static void ak4114_stats(struct work_struct *work); +static void ak4114_init_regs(struct ak4114 *chip); + +static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val) +{ + ak4114->write(ak4114->private_data, reg, val); + if (reg <= AK4114_REG_INT1_MASK) + ak4114->regmap[reg] = val; + else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) + ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val; +} + +static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg) +{ + return ak4114->read(ak4114->private_data, reg); +} + +#if 0 +static void reg_dump(struct ak4114 *ak4114) +{ + int i; + + printk(KERN_DEBUG "AK4114 REG DUMP:\n"); + for (i = 0; i < 0x20; i++) + printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < ARRAY_SIZE(ak4114->regmap) ? ak4114->regmap[i] : 0); +} +#endif + +static void snd_ak4114_free(struct ak4114 *chip) +{ + atomic_inc(&chip->wq_processing); /* don't schedule new work */ + cancel_delayed_work_sync(&chip->work); + kfree(chip); +} + +static int snd_ak4114_dev_free(struct snd_device *device) +{ + struct ak4114 *chip = device->device_data; + snd_ak4114_free(chip); + return 0; +} + +int snd_ak4114_create(struct snd_card *card, + ak4114_read_t *read, ak4114_write_t *write, + const unsigned char pgm[6], const unsigned char txcsb[5], + void *private_data, struct ak4114 **r_ak4114) +{ + struct ak4114 *chip; + int err = 0; + unsigned char reg; + static struct snd_device_ops ops = { + .dev_free = snd_ak4114_dev_free, + }; + + chip = kzalloc(sizeof(*chip), GFP_KERNEL); + if (chip == NULL) + return -ENOMEM; + spin_lock_init(&chip->lock); + chip->card = card; + chip->read = read; + chip->write = write; + chip->private_data = private_data; + INIT_DELAYED_WORK(&chip->work, ak4114_stats); + atomic_set(&chip->wq_processing, 0); + mutex_init(&chip->reinit_mutex); + + for (reg = 0; reg < 6; reg++) + chip->regmap[reg] = pgm[reg]; + for (reg = 0; reg < 5; reg++) + chip->txcsb[reg] = txcsb[reg]; + + ak4114_init_regs(chip); + + chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT); + chip->rcs1 = reg_read(chip, AK4114_REG_RCS1); + + if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0) + goto __fail; + + if (r_ak4114) + *r_ak4114 = chip; + return 0; + + __fail: + snd_ak4114_free(chip); + return err < 0 ? err : -EIO; +} +EXPORT_SYMBOL(snd_ak4114_create); + +void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val) +{ + if (reg <= AK4114_REG_INT1_MASK) + reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val); + else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) + reg_write(chip, reg, + (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val); +} +EXPORT_SYMBOL(snd_ak4114_reg_write); + +static void ak4114_init_regs(struct ak4114 *chip) +{ + unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg; + + /* bring the chip to reset state and powerdown state */ + reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN)); + udelay(200); + /* release reset, but leave powerdown */ + reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN); + udelay(200); + for (reg = 1; reg < 6; reg++) + reg_write(chip, reg, chip->regmap[reg]); + for (reg = 0; reg < 5; reg++) + reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]); + /* release powerdown, everything is initialized now */ + reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN); +} + +void snd_ak4114_reinit(struct ak4114 *chip) +{ + if (atomic_inc_return(&chip->wq_processing) == 1) + cancel_delayed_work_sync(&chip->work); + mutex_lock(&chip->reinit_mutex); + ak4114_init_regs(chip); + mutex_unlock(&chip->reinit_mutex); + /* bring up statistics / event queing */ + if (atomic_dec_and_test(&chip->wq_processing)) + schedule_delayed_work(&chip->work, HZ / 10); +} +EXPORT_SYMBOL(snd_ak4114_reinit); + +static unsigned int external_rate(unsigned char rcs1) +{ + switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) { + case AK4114_FS_32000HZ: return 32000; + case AK4114_FS_44100HZ: return 44100; + case AK4114_FS_48000HZ: return 48000; + case AK4114_FS_88200HZ: return 88200; + case AK4114_FS_96000HZ: return 96000; + case AK4114_FS_176400HZ: return 176400; + case AK4114_FS_192000HZ: return 192000; + default: return 0; + } +} + +static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = LONG_MAX; + return 0; +} + +static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4114 *chip = snd_kcontrol_chip(kcontrol); + long *ptr; + + spin_lock_irq(&chip->lock); + ptr = (long *)(((char *)chip) + kcontrol->private_value); + ucontrol->value.integer.value[0] = *ptr; + *ptr = 0; + spin_unlock_irq(&chip->lock); + return 0; +} + +#define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info + +static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4114 *chip = snd_kcontrol_chip(kcontrol); + unsigned char reg = kcontrol->private_value & 0xff; + unsigned char bit = (kcontrol->private_value >> 8) & 0xff; + unsigned char inv = (kcontrol->private_value >> 31) & 1; + + ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv; + return 0; +} + +static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 192000; + return 0; +} + +static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4114 *chip = snd_kcontrol_chip(kcontrol); + + ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1)); + return 0; +} + +static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; + uinfo->count = 1; + return 0; +} + +static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4114 *chip = snd_kcontrol_chip(kcontrol); + unsigned i; + + for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++) + ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i); + return 0; +} + +static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4114 *chip = snd_kcontrol_chip(kcontrol); + unsigned i; + + for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) + ucontrol->value.iec958.status[i] = chip->txcsb[i]; + return 0; +} + +static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4114 *chip = snd_kcontrol_chip(kcontrol); + unsigned i; + + for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) + reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]); + return 0; +} + +static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; + uinfo->count = 1; + return 0; +} + +static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE); + return 0; +} + +static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 0xffff; + uinfo->count = 4; + return 0; +} + +static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4114 *chip = snd_kcontrol_chip(kcontrol); + unsigned short tmp; + + ucontrol->value.integer.value[0] = 0xf8f2; + ucontrol->value.integer.value[1] = 0x4e1f; + tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8); + ucontrol->value.integer.value[2] = tmp; + tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8); + ucontrol->value.integer.value[3] = tmp; + return 0; +} + +static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; + uinfo->count = AK4114_REG_QSUB_SIZE; + return 0; +} + +static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4114 *chip = snd_kcontrol_chip(kcontrol); + unsigned i; + + for (i = 0; i < AK4114_REG_QSUB_SIZE; i++) + ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i); + return 0; +} + +/* Don't forget to change AK4114_CONTROLS define!!! */ +static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = { +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Parity Errors", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_in_error_info, + .get = snd_ak4114_in_error_get, + .private_value = offsetof(struct ak4114, parity_errors), +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 V-Bit Errors", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_in_error_info, + .get = snd_ak4114_in_error_get, + .private_value = offsetof(struct ak4114, v_bit_errors), +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 C-CRC Errors", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_in_error_info, + .get = snd_ak4114_in_error_get, + .private_value = offsetof(struct ak4114, ccrc_errors), +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Q-CRC Errors", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_in_error_info, + .get = snd_ak4114_in_error_get, + .private_value = offsetof(struct ak4114, qcrc_errors), +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 External Rate", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_rate_info, + .get = snd_ak4114_rate_get, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK), + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = snd_ak4114_spdif_mask_info, + .get = snd_ak4114_spdif_mask_get, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT), + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_spdif_info, + .get = snd_ak4114_spdif_playback_get, + .put = snd_ak4114_spdif_playback_put, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK), + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = snd_ak4114_spdif_mask_info, + .get = snd_ak4114_spdif_mask_get, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT), + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_spdif_info, + .get = snd_ak4114_spdif_get, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Preamble Capture Default", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_spdif_pinfo, + .get = snd_ak4114_spdif_pget, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Q-subcode Capture Default", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_spdif_qinfo, + .get = snd_ak4114_spdif_qget, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Audio", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_in_bit_info, + .get = snd_ak4114_in_bit_get, + .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Non-PCM Bitstream", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_in_bit_info, + .get = snd_ak4114_in_bit_get, + .private_value = (6<<8) | AK4114_REG_RCS0, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 DTS Bitstream", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_in_bit_info, + .get = snd_ak4114_in_bit_get, + .private_value = (3<<8) | AK4114_REG_RCS0, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 PPL Lock Status", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4114_in_bit_info, + .get = snd_ak4114_in_bit_get, + .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0, +} +}; + + +static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry, + struct snd_info_buffer *buffer) +{ + struct ak4114 *ak4114 = entry->private_data; + int reg, val; + /* all ak4114 registers 0x00 - 0x1f */ + for (reg = 0; reg < 0x20; reg++) { + val = reg_read(ak4114, reg); + snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val); + } +} + +static void snd_ak4114_proc_init(struct ak4114 *ak4114) +{ + struct snd_info_entry *entry; + if (!snd_card_proc_new(ak4114->card, "ak4114", &entry)) + snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read); +} + +int snd_ak4114_build(struct ak4114 *ak4114, + struct snd_pcm_substream *ply_substream, + struct snd_pcm_substream *cap_substream) +{ + struct snd_kcontrol *kctl; + unsigned int idx; + int err; + + if (snd_BUG_ON(!cap_substream)) + return -EINVAL; + ak4114->playback_substream = ply_substream; + ak4114->capture_substream = cap_substream; + for (idx = 0; idx < AK4114_CONTROLS; idx++) { + kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114); + if (kctl == NULL) + return -ENOMEM; + if (strstr(kctl->id.name, "Playback")) { + if (ply_substream == NULL) { + snd_ctl_free_one(kctl); + ak4114->kctls[idx] = NULL; + continue; + } + kctl->id.device = ply_substream->pcm->device; + kctl->id.subdevice = ply_substream->number; + } else { + kctl->id.device = cap_substream->pcm->device; + kctl->id.subdevice = cap_substream->number; + } + err = snd_ctl_add(ak4114->card, kctl); + if (err < 0) + return err; + ak4114->kctls[idx] = kctl; + } + snd_ak4114_proc_init(ak4114); + /* trigger workq */ + schedule_delayed_work(&ak4114->work, HZ / 10); + return 0; +} +EXPORT_SYMBOL(snd_ak4114_build); + +/* notify kcontrols if any parameters are changed */ +static void ak4114_notify(struct ak4114 *ak4114, + unsigned char rcs0, unsigned char rcs1, + unsigned char c0, unsigned char c1) +{ + if (!ak4114->kctls[0]) + return; + + if (rcs0 & AK4114_PAR) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[0]->id); + if (rcs0 & AK4114_V) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[1]->id); + if (rcs1 & AK4114_CCRC) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[2]->id); + if (rcs1 & AK4114_QCRC) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[3]->id); + + /* rate change */ + if (c1 & 0xf0) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[4]->id); + + if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT)) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[9]->id); + if (c0 & AK4114_QINT) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[10]->id); + + if (c0 & AK4114_AUDION) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[11]->id); + if (c0 & AK4114_AUTO) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[12]->id); + if (c0 & AK4114_DTSCD) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[13]->id); + if (c0 & AK4114_UNLCK) + snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, + &ak4114->kctls[14]->id); +} + +int snd_ak4114_external_rate(struct ak4114 *ak4114) +{ + unsigned char rcs1; + + rcs1 = reg_read(ak4114, AK4114_REG_RCS1); + return external_rate(rcs1); +} +EXPORT_SYMBOL(snd_ak4114_external_rate); + +int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags) +{ + struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL; + unsigned long _flags; + int res = 0; + unsigned char rcs0, rcs1; + unsigned char c0, c1; + + rcs1 = reg_read(ak4114, AK4114_REG_RCS1); + if (flags & AK4114_CHECK_NO_STAT) + goto __rate; + rcs0 = reg_read(ak4114, AK4114_REG_RCS0); + spin_lock_irqsave(&ak4114->lock, _flags); + if (rcs0 & AK4114_PAR) + ak4114->parity_errors++; + if (rcs1 & AK4114_V) + ak4114->v_bit_errors++; + if (rcs1 & AK4114_CCRC) + ak4114->ccrc_errors++; + if (rcs1 & AK4114_QCRC) + ak4114->qcrc_errors++; + c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^ + (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)); + c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0); + ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT); + ak4114->rcs1 = rcs1; + spin_unlock_irqrestore(&ak4114->lock, _flags); + + ak4114_notify(ak4114, rcs0, rcs1, c0, c1); + if (ak4114->change_callback && (c0 | c1) != 0) + ak4114->change_callback(ak4114, c0, c1); + + __rate: + /* compare rate */ + res = external_rate(rcs1); + if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) { + snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags); + if (snd_pcm_running(ak4114->capture_substream)) { + // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res); + snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING); + res = 1; + } + snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags); + } + return res; +} +EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors); + +static void ak4114_stats(struct work_struct *work) +{ + struct ak4114 *chip = container_of(work, struct ak4114, work.work); + + if (atomic_inc_return(&chip->wq_processing) == 1) + snd_ak4114_check_rate_and_errors(chip, chip->check_flags); + if (atomic_dec_and_test(&chip->wq_processing)) + schedule_delayed_work(&chip->work, HZ / 10); +} + +#ifdef CONFIG_PM +void snd_ak4114_suspend(struct ak4114 *chip) +{ + atomic_inc(&chip->wq_processing); /* don't schedule new work */ + cancel_delayed_work_sync(&chip->work); +} +EXPORT_SYMBOL(snd_ak4114_suspend); + +void snd_ak4114_resume(struct ak4114 *chip) +{ + atomic_dec(&chip->wq_processing); + snd_ak4114_reinit(chip); +} +EXPORT_SYMBOL(snd_ak4114_resume); +#endif |