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532 lines
16 KiB
532 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Routines for control of the AK4117 via 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/ak4117.h> |
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#include <sound/asoundef.h> |
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MODULE_AUTHOR("Jaroslav Kysela <[email protected]>"); |
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MODULE_DESCRIPTION("AK4117 IEC958 (S/PDIF) receiver by Asahi Kasei"); |
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MODULE_LICENSE("GPL"); |
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#define AK4117_ADDR 0x00 /* fixed address */ |
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static void snd_ak4117_timer(struct timer_list *t); |
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static void reg_write(struct ak4117 *ak4117, unsigned char reg, unsigned char val) |
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{ |
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ak4117->write(ak4117->private_data, reg, val); |
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if (reg < sizeof(ak4117->regmap)) |
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ak4117->regmap[reg] = val; |
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} |
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static inline unsigned char reg_read(struct ak4117 *ak4117, unsigned char reg) |
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{ |
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return ak4117->read(ak4117->private_data, reg); |
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} |
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#if 0 |
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static void reg_dump(struct ak4117 *ak4117) |
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{ |
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int i; |
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printk(KERN_DEBUG "AK4117 REG DUMP:\n"); |
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for (i = 0; i < 0x1b; i++) |
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printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4117, i), i < sizeof(ak4117->regmap) ? ak4117->regmap[i] : 0); |
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} |
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#endif |
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static void snd_ak4117_free(struct ak4117 *chip) |
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{ |
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del_timer_sync(&chip->timer); |
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kfree(chip); |
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} |
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static int snd_ak4117_dev_free(struct snd_device *device) |
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{ |
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struct ak4117 *chip = device->device_data; |
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snd_ak4117_free(chip); |
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return 0; |
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} |
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int snd_ak4117_create(struct snd_card *card, ak4117_read_t *read, ak4117_write_t *write, |
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const unsigned char pgm[5], void *private_data, struct ak4117 **r_ak4117) |
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{ |
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struct ak4117 *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_ak4117_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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timer_setup(&chip->timer, snd_ak4117_timer, 0); |
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for (reg = 0; reg < 5; reg++) |
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chip->regmap[reg] = pgm[reg]; |
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snd_ak4117_reinit(chip); |
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chip->rcs0 = reg_read(chip, AK4117_REG_RCS0) & ~(AK4117_QINT | AK4117_CINT | AK4117_STC); |
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chip->rcs1 = reg_read(chip, AK4117_REG_RCS1); |
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chip->rcs2 = reg_read(chip, AK4117_REG_RCS2); |
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if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0) |
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goto __fail; |
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if (r_ak4117) |
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*r_ak4117 = chip; |
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return 0; |
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__fail: |
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snd_ak4117_free(chip); |
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return err; |
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} |
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void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val) |
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{ |
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if (reg >= 5) |
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return; |
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reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val); |
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} |
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void snd_ak4117_reinit(struct ak4117 *chip) |
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{ |
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unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg; |
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del_timer(&chip->timer); |
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chip->init = 1; |
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/* bring the chip to reset state and powerdown state */ |
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reg_write(chip, AK4117_REG_PWRDN, 0); |
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udelay(200); |
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/* release reset, but leave powerdown */ |
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reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN); |
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udelay(200); |
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for (reg = 1; reg < 5; reg++) |
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reg_write(chip, reg, chip->regmap[reg]); |
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/* release powerdown, everything is initialized now */ |
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reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN); |
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chip->init = 0; |
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mod_timer(&chip->timer, 1 + jiffies); |
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} |
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static unsigned int external_rate(unsigned char rcs1) |
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{ |
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switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) { |
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case AK4117_FS_32000HZ: return 32000; |
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case AK4117_FS_44100HZ: return 44100; |
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case AK4117_FS_48000HZ: return 48000; |
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case AK4117_FS_88200HZ: return 88200; |
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case AK4117_FS_96000HZ: return 96000; |
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case AK4117_FS_176400HZ: return 176400; |
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case AK4117_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_ak4117_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_ak4117_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 ak4117 *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_ak4117_in_bit_info snd_ctl_boolean_mono_info |
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static int snd_ak4117_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 ak4117 *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_ak4117_rx_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 = 1; |
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return 0; |
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} |
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static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol); |
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ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0; |
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return 0; |
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} |
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static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol); |
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int change; |
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u8 old_val; |
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spin_lock_irq(&chip->lock); |
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old_val = chip->regmap[AK4117_REG_IO]; |
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change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0); |
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if (change) |
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reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0)); |
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spin_unlock_irq(&chip->lock); |
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return change; |
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} |
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static int snd_ak4117_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_ak4117_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 ak4117 *chip = snd_kcontrol_chip(kcontrol); |
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ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1)); |
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return 0; |
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} |
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static int snd_ak4117_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_ak4117_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 ak4117 *chip = snd_kcontrol_chip(kcontrol); |
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unsigned i; |
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for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++) |
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ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i); |
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return 0; |
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} |
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static int snd_ak4117_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_ak4117_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, AK4117_REG_RXCSB_SIZE); |
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return 0; |
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} |
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static int snd_ak4117_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_ak4117_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 ak4117 *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, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8); |
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ucontrol->value.integer.value[2] = tmp; |
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tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_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_ak4117_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 = AK4117_REG_QSUB_SIZE; |
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return 0; |
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} |
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static int snd_ak4117_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 ak4117 *chip = snd_kcontrol_chip(kcontrol); |
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unsigned i; |
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for (i = 0; i < AK4117_REG_QSUB_SIZE; i++) |
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ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i); |
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return 0; |
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} |
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/* Don't forget to change AK4117_CONTROLS define!!! */ |
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static const struct snd_kcontrol_new snd_ak4117_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_ak4117_in_error_info, |
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.get = snd_ak4117_in_error_get, |
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.private_value = AK4117_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_ak4117_in_error_info, |
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.get = snd_ak4117_in_error_get, |
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.private_value = AK4117_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_ak4117_in_error_info, |
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.get = snd_ak4117_in_error_get, |
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.private_value = AK4117_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_ak4117_in_error_info, |
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.get = snd_ak4117_in_error_get, |
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.private_value = AK4117_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_ak4117_rate_info, |
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.get = snd_ak4117_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("",CAPTURE,MASK), |
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.access = SNDRV_CTL_ELEM_ACCESS_READ, |
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.info = snd_ak4117_spdif_mask_info, |
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.get = snd_ak4117_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_ak4117_spdif_info, |
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.get = snd_ak4117_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_ak4117_spdif_pinfo, |
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.get = snd_ak4117_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_ak4117_spdif_qinfo, |
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.get = snd_ak4117_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_ak4117_in_bit_info, |
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.get = snd_ak4117_in_bit_get, |
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.private_value = (1<<31) | (3<<8) | AK4117_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_ak4117_in_bit_info, |
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.get = snd_ak4117_in_bit_get, |
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.private_value = (5<<8) | AK4117_REG_RCS1, |
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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_ak4117_in_bit_info, |
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.get = snd_ak4117_in_bit_get, |
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.private_value = (6<<8) | AK4117_REG_RCS1, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = "AK4117 Input Select", |
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE, |
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.info = snd_ak4117_rx_info, |
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.get = snd_ak4117_rx_get, |
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.put = snd_ak4117_rx_put, |
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} |
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}; |
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int snd_ak4117_build(struct ak4117 *ak4117, 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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if (snd_BUG_ON(!cap_substream)) |
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return -EINVAL; |
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ak4117->substream = cap_substream; |
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for (idx = 0; idx < AK4117_CONTROLS; idx++) { |
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kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117); |
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if (kctl == NULL) |
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return -ENOMEM; |
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kctl->id.device = cap_substream->pcm->device; |
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kctl->id.subdevice = cap_substream->number; |
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err = snd_ctl_add(ak4117->card, kctl); |
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if (err < 0) |
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return err; |
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ak4117->kctls[idx] = kctl; |
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} |
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return 0; |
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} |
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int snd_ak4117_external_rate(struct ak4117 *ak4117) |
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{ |
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unsigned char rcs1; |
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rcs1 = reg_read(ak4117, AK4117_REG_RCS1); |
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return external_rate(rcs1); |
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} |
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int snd_ak4117_check_rate_and_errors(struct ak4117 *ak4117, unsigned int flags) |
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{ |
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struct snd_pcm_runtime *runtime = ak4117->substream ? ak4117->substream->runtime : NULL; |
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unsigned long _flags; |
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int res = 0; |
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unsigned char rcs0, rcs1, rcs2; |
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unsigned char c0, c1; |
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rcs1 = reg_read(ak4117, AK4117_REG_RCS1); |
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if (flags & AK4117_CHECK_NO_STAT) |
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goto __rate; |
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rcs0 = reg_read(ak4117, AK4117_REG_RCS0); |
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rcs2 = reg_read(ak4117, AK4117_REG_RCS2); |
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// printk(KERN_DEBUG "AK IRQ: rcs0 = 0x%x, rcs1 = 0x%x, rcs2 = 0x%x\n", rcs0, rcs1, rcs2); |
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spin_lock_irqsave(&ak4117->lock, _flags); |
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if (rcs0 & AK4117_PAR) |
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ak4117->errors[AK4117_PARITY_ERRORS]++; |
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if (rcs0 & AK4117_V) |
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ak4117->errors[AK4117_V_BIT_ERRORS]++; |
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if (rcs2 & AK4117_CCRC) |
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ak4117->errors[AK4117_CCRC_ERRORS]++; |
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if (rcs2 & AK4117_QCRC) |
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ak4117->errors[AK4117_QCRC_ERRORS]++; |
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c0 = (ak4117->rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)) ^ |
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(rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)); |
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c1 = (ak4117->rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)) ^ |
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(rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)); |
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ak4117->rcs0 = rcs0 & ~(AK4117_QINT | AK4117_CINT | AK4117_STC); |
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ak4117->rcs1 = rcs1; |
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ak4117->rcs2 = rcs2; |
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spin_unlock_irqrestore(&ak4117->lock, _flags); |
|
|
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if (rcs0 & AK4117_PAR) |
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[0]->id); |
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if (rcs0 & AK4117_V) |
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snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[1]->id); |
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if (rcs2 & AK4117_CCRC) |
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snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[2]->id); |
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if (rcs2 & AK4117_QCRC) |
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[3]->id); |
|
|
|
/* rate change */ |
|
if (c1 & 0x0f) |
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[4]->id); |
|
|
|
if ((c1 & AK4117_PEM) | (c0 & AK4117_CINT)) |
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[6]->id); |
|
if (c0 & AK4117_QINT) |
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[8]->id); |
|
|
|
if (c0 & AK4117_AUDION) |
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[9]->id); |
|
if (c1 & AK4117_NPCM) |
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[10]->id); |
|
if (c1 & AK4117_DTSCD) |
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[11]->id); |
|
|
|
if (ak4117->change_callback && (c0 | c1) != 0) |
|
ak4117->change_callback(ak4117, c0, c1); |
|
|
|
__rate: |
|
/* compare rate */ |
|
res = external_rate(rcs1); |
|
if (!(flags & AK4117_CHECK_NO_RATE) && runtime && runtime->rate != res) { |
|
snd_pcm_stream_lock_irqsave(ak4117->substream, _flags); |
|
if (snd_pcm_running(ak4117->substream)) { |
|
// printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res); |
|
snd_pcm_stop(ak4117->substream, SNDRV_PCM_STATE_DRAINING); |
|
wake_up(&runtime->sleep); |
|
res = 1; |
|
} |
|
snd_pcm_stream_unlock_irqrestore(ak4117->substream, _flags); |
|
} |
|
return res; |
|
} |
|
|
|
static void snd_ak4117_timer(struct timer_list *t) |
|
{ |
|
struct ak4117 *chip = from_timer(chip, t, timer); |
|
|
|
if (chip->init) |
|
return; |
|
snd_ak4117_check_rate_and_errors(chip, 0); |
|
mod_timer(&chip->timer, 1 + jiffies); |
|
} |
|
|
|
EXPORT_SYMBOL(snd_ak4117_create); |
|
EXPORT_SYMBOL(snd_ak4117_reg_write); |
|
EXPORT_SYMBOL(snd_ak4117_reinit); |
|
EXPORT_SYMBOL(snd_ak4117_build); |
|
EXPORT_SYMBOL(snd_ak4117_external_rate); |
|
EXPORT_SYMBOL(snd_ak4117_check_rate_and_errors);
|
|
|