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626 lines
18 KiB
626 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Routines for control of the AK4114 via I2C and 4-wire serial interface |
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* IEC958 (S/PDIF) receiver by Asahi Kasei |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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*/ |
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#include <linux/slab.h> |
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#include <linux/delay.h> |
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#include <linux/module.h> |
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#include <sound/core.h> |
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#include <sound/control.h> |
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#include <sound/pcm.h> |
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#include <sound/ak4114.h> |
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#include <sound/asoundef.h> |
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#include <sound/info.h> |
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MODULE_AUTHOR("Jaroslav Kysela <[email protected]>"); |
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MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei"); |
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MODULE_LICENSE("GPL"); |
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#define AK4114_ADDR 0x00 /* fixed address */ |
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static void ak4114_stats(struct work_struct *work); |
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static void ak4114_init_regs(struct ak4114 *chip); |
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static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val) |
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{ |
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ak4114->write(ak4114->private_data, reg, val); |
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if (reg <= AK4114_REG_INT1_MASK) |
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ak4114->regmap[reg] = val; |
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else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) |
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ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val; |
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} |
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static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg) |
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{ |
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return ak4114->read(ak4114->private_data, reg); |
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} |
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#if 0 |
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static void reg_dump(struct ak4114 *ak4114) |
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{ |
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int i; |
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printk(KERN_DEBUG "AK4114 REG DUMP:\n"); |
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for (i = 0; i < 0x20; i++) |
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printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < ARRAY_SIZE(ak4114->regmap) ? ak4114->regmap[i] : 0); |
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} |
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#endif |
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static void snd_ak4114_free(struct ak4114 *chip) |
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{ |
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atomic_inc(&chip->wq_processing); /* don't schedule new work */ |
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cancel_delayed_work_sync(&chip->work); |
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kfree(chip); |
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} |
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static int snd_ak4114_dev_free(struct snd_device *device) |
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{ |
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struct ak4114 *chip = device->device_data; |
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snd_ak4114_free(chip); |
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return 0; |
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} |
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int snd_ak4114_create(struct snd_card *card, |
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ak4114_read_t *read, ak4114_write_t *write, |
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const unsigned char pgm[6], const unsigned char txcsb[5], |
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void *private_data, struct ak4114 **r_ak4114) |
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{ |
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struct ak4114 *chip; |
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int err = 0; |
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unsigned char reg; |
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static const struct snd_device_ops ops = { |
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.dev_free = snd_ak4114_dev_free, |
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}; |
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chip = kzalloc(sizeof(*chip), GFP_KERNEL); |
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if (chip == NULL) |
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return -ENOMEM; |
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spin_lock_init(&chip->lock); |
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chip->card = card; |
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chip->read = read; |
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chip->write = write; |
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chip->private_data = private_data; |
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INIT_DELAYED_WORK(&chip->work, ak4114_stats); |
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atomic_set(&chip->wq_processing, 0); |
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mutex_init(&chip->reinit_mutex); |
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for (reg = 0; reg < 6; reg++) |
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chip->regmap[reg] = pgm[reg]; |
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for (reg = 0; reg < 5; reg++) |
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chip->txcsb[reg] = txcsb[reg]; |
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ak4114_init_regs(chip); |
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chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT); |
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chip->rcs1 = reg_read(chip, AK4114_REG_RCS1); |
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err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops); |
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if (err < 0) |
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goto __fail; |
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if (r_ak4114) |
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*r_ak4114 = chip; |
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return 0; |
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__fail: |
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snd_ak4114_free(chip); |
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return err; |
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} |
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EXPORT_SYMBOL(snd_ak4114_create); |
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void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val) |
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{ |
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if (reg <= AK4114_REG_INT1_MASK) |
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reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val); |
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else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4) |
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reg_write(chip, reg, |
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(chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val); |
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} |
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EXPORT_SYMBOL(snd_ak4114_reg_write); |
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static void ak4114_init_regs(struct ak4114 *chip) |
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{ |
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unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg; |
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/* bring the chip to reset state and powerdown state */ |
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reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN)); |
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udelay(200); |
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/* release reset, but leave powerdown */ |
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reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN); |
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udelay(200); |
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for (reg = 1; reg < 6; reg++) |
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reg_write(chip, reg, chip->regmap[reg]); |
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for (reg = 0; reg < 5; reg++) |
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reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]); |
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/* release powerdown, everything is initialized now */ |
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reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN); |
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} |
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void snd_ak4114_reinit(struct ak4114 *chip) |
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{ |
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if (atomic_inc_return(&chip->wq_processing) == 1) |
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cancel_delayed_work_sync(&chip->work); |
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mutex_lock(&chip->reinit_mutex); |
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ak4114_init_regs(chip); |
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mutex_unlock(&chip->reinit_mutex); |
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/* bring up statistics / event queing */ |
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if (atomic_dec_and_test(&chip->wq_processing)) |
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schedule_delayed_work(&chip->work, HZ / 10); |
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} |
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EXPORT_SYMBOL(snd_ak4114_reinit); |
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static unsigned int external_rate(unsigned char rcs1) |
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{ |
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switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) { |
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case AK4114_FS_32000HZ: return 32000; |
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case AK4114_FS_44100HZ: return 44100; |
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case AK4114_FS_48000HZ: return 48000; |
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case AK4114_FS_88200HZ: return 88200; |
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case AK4114_FS_96000HZ: return 96000; |
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case AK4114_FS_176400HZ: return 176400; |
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case AK4114_FS_192000HZ: return 192000; |
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default: return 0; |
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} |
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} |
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static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_info *uinfo) |
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{ |
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
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uinfo->count = 1; |
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uinfo->value.integer.min = 0; |
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uinfo->value.integer.max = LONG_MAX; |
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return 0; |
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} |
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static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4114 *chip = snd_kcontrol_chip(kcontrol); |
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spin_lock_irq(&chip->lock); |
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ucontrol->value.integer.value[0] = |
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chip->errors[kcontrol->private_value]; |
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chip->errors[kcontrol->private_value] = 0; |
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spin_unlock_irq(&chip->lock); |
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return 0; |
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} |
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#define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info |
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static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4114 *chip = snd_kcontrol_chip(kcontrol); |
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unsigned char reg = kcontrol->private_value & 0xff; |
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unsigned char bit = (kcontrol->private_value >> 8) & 0xff; |
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unsigned char inv = (kcontrol->private_value >> 31) & 1; |
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ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv; |
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return 0; |
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} |
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static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_info *uinfo) |
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{ |
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
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uinfo->count = 1; |
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uinfo->value.integer.min = 0; |
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uinfo->value.integer.max = 192000; |
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return 0; |
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} |
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static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4114 *chip = snd_kcontrol_chip(kcontrol); |
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ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1)); |
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return 0; |
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} |
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static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) |
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{ |
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uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; |
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uinfo->count = 1; |
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return 0; |
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} |
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static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4114 *chip = snd_kcontrol_chip(kcontrol); |
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unsigned i; |
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for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++) |
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ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i); |
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return 0; |
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} |
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static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4114 *chip = snd_kcontrol_chip(kcontrol); |
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unsigned i; |
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for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) |
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ucontrol->value.iec958.status[i] = chip->txcsb[i]; |
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return 0; |
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} |
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static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4114 *chip = snd_kcontrol_chip(kcontrol); |
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unsigned i; |
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for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++) |
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reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]); |
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return 0; |
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} |
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static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) |
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{ |
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uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; |
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uinfo->count = 1; |
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return 0; |
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} |
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static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE); |
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return 0; |
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} |
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static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) |
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{ |
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
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uinfo->value.integer.min = 0; |
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uinfo->value.integer.max = 0xffff; |
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uinfo->count = 4; |
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return 0; |
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} |
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static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4114 *chip = snd_kcontrol_chip(kcontrol); |
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unsigned short tmp; |
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ucontrol->value.integer.value[0] = 0xf8f2; |
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ucontrol->value.integer.value[1] = 0x4e1f; |
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tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8); |
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ucontrol->value.integer.value[2] = tmp; |
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tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8); |
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ucontrol->value.integer.value[3] = tmp; |
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return 0; |
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} |
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static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) |
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{ |
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uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; |
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uinfo->count = AK4114_REG_QSUB_SIZE; |
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return 0; |
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} |
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static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4114 *chip = snd_kcontrol_chip(kcontrol); |
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unsigned i; |
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for (i = 0; i < AK4114_REG_QSUB_SIZE; i++) |
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ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i); |
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return 0; |
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} |
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/* Don't forget to change AK4114_CONTROLS define!!! */ |
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static const struct snd_kcontrol_new snd_ak4114_iec958_controls[] = { |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 Parity Errors", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_in_error_info, |
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.get = snd_ak4114_in_error_get, |
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.private_value = AK4114_PARITY_ERRORS, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 V-Bit Errors", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_in_error_info, |
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.get = snd_ak4114_in_error_get, |
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.private_value = AK4114_V_BIT_ERRORS, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 C-CRC Errors", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_in_error_info, |
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.get = snd_ak4114_in_error_get, |
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.private_value = AK4114_CCRC_ERRORS, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 Q-CRC Errors", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_in_error_info, |
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.get = snd_ak4114_in_error_get, |
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.private_value = AK4114_QCRC_ERRORS, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 External Rate", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_rate_info, |
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.get = snd_ak4114_rate_get, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK), |
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.access = SNDRV_CTL_ELEM_ACCESS_READ, |
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.info = snd_ak4114_spdif_mask_info, |
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.get = snd_ak4114_spdif_mask_get, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT), |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_spdif_info, |
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.get = snd_ak4114_spdif_playback_get, |
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.put = snd_ak4114_spdif_playback_put, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK), |
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.access = SNDRV_CTL_ELEM_ACCESS_READ, |
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.info = snd_ak4114_spdif_mask_info, |
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.get = snd_ak4114_spdif_mask_get, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT), |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_spdif_info, |
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.get = snd_ak4114_spdif_get, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 Preamble Capture Default", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_spdif_pinfo, |
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.get = snd_ak4114_spdif_pget, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 Q-subcode Capture Default", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_spdif_qinfo, |
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.get = snd_ak4114_spdif_qget, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 Audio", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_in_bit_info, |
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.get = snd_ak4114_in_bit_get, |
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.private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 Non-PCM Bitstream", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_in_bit_info, |
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.get = snd_ak4114_in_bit_get, |
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.private_value = (6<<8) | AK4114_REG_RCS0, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 DTS Bitstream", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_in_bit_info, |
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.get = snd_ak4114_in_bit_get, |
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.private_value = (3<<8) | AK4114_REG_RCS0, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "IEC958 PPL Lock Status", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, |
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.info = snd_ak4114_in_bit_info, |
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.get = snd_ak4114_in_bit_get, |
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.private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0, |
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} |
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}; |
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static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry, |
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struct snd_info_buffer *buffer) |
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{ |
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struct ak4114 *ak4114 = entry->private_data; |
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int reg, val; |
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/* all ak4114 registers 0x00 - 0x1f */ |
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for (reg = 0; reg < 0x20; reg++) { |
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val = reg_read(ak4114, reg); |
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snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val); |
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} |
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} |
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static void snd_ak4114_proc_init(struct ak4114 *ak4114) |
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{ |
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snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114, |
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snd_ak4114_proc_regs_read); |
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} |
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int snd_ak4114_build(struct ak4114 *ak4114, |
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struct snd_pcm_substream *ply_substream, |
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struct snd_pcm_substream *cap_substream) |
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{ |
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struct snd_kcontrol *kctl; |
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unsigned int idx; |
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int err; |
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|
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if (snd_BUG_ON(!cap_substream)) |
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return -EINVAL; |
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ak4114->playback_substream = ply_substream; |
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ak4114->capture_substream = cap_substream; |
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for (idx = 0; idx < AK4114_CONTROLS; idx++) { |
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kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114); |
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if (kctl == NULL) |
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return -ENOMEM; |
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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->errors[AK4114_PARITY_ERRORS]++; |
|
if (rcs1 & AK4114_V) |
|
ak4114->errors[AK4114_V_BIT_ERRORS]++; |
|
if (rcs1 & AK4114_CCRC) |
|
ak4114->errors[AK4114_CCRC_ERRORS]++; |
|
if (rcs1 & AK4114_QCRC) |
|
ak4114->errors[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
|
|
|