580 lines
17 KiB
C
580 lines
17 KiB
C
/*
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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 <perex@suse.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <linux/slab.h>
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#include <linux/delay.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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MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
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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 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_RXCSB0 && reg <= AK4114_REG_TXCSB4)
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ak4114->txcsb[reg-AK4114_REG_RXCSB0] = 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 < sizeof(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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chip->init = 1; /* don't schedule new work */
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mb();
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if (chip->workqueue != NULL) {
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flush_workqueue(chip->workqueue);
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destroy_workqueue(chip->workqueue);
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}
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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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unsigned char pgm[7], 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 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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for (reg = 0; reg < 7; 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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chip->workqueue = create_workqueue("snd-ak4114");
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if (chip->workqueue == NULL) {
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kfree(chip);
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return -ENOMEM;
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}
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snd_ak4114_reinit(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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if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 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 < 0 ? err : -EIO;
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}
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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, (chip->txcsb[reg] & ~mask) | val);
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}
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void snd_ak4114_reinit(struct ak4114 *chip)
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{
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unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
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chip->init = 1;
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mb();
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flush_workqueue(chip->workqueue);
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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 < 7; 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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/* bring up statistics / event queing */
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chip->init = 0;
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INIT_DELAYED_WORK(&chip->work, ak4114_stats);
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queue_delayed_work(chip->workqueue, &chip->work, HZ / 10);
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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 & (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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long *ptr;
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spin_lock_irq(&chip->lock);
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ptr = (long *)(((char *)chip) + kcontrol->private_value);
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ucontrol->value.integer.value[0] = *ptr;
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*ptr = 0;
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spin_unlock_irq(&chip->lock);
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return 0;
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}
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static int snd_ak4114_in_bit_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_BOOLEAN;
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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_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 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 = offsetof(struct 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 = offsetof(struct 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 = offsetof(struct 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 = offsetof(struct 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 Preample 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,
|
|
.private_value = (6<<8) | AK4114_REG_RCS1,
|
|
},
|
|
{
|
|
.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_RCS1,
|
|
}
|
|
};
|
|
|
|
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;
|
|
|
|
snd_assert(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;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int snd_ak4114_external_rate(struct ak4114 *ak4114)
|
|
{
|
|
unsigned char rcs1;
|
|
|
|
rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
|
|
return external_rate(rcs1);
|
|
}
|
|
|
|
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);
|
|
|
|
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 (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;
|
|
}
|
|
|
|
static void ak4114_stats(struct work_struct *work)
|
|
{
|
|
struct ak4114 *chip = container_of(work, struct ak4114, work.work);
|
|
|
|
if (chip->init)
|
|
return;
|
|
snd_ak4114_check_rate_and_errors(chip, 0);
|
|
queue_delayed_work(chip->workqueue, &chip->work, HZ / 10);
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_ak4114_create);
|
|
EXPORT_SYMBOL(snd_ak4114_reg_write);
|
|
EXPORT_SYMBOL(snd_ak4114_reinit);
|
|
EXPORT_SYMBOL(snd_ak4114_build);
|
|
EXPORT_SYMBOL(snd_ak4114_external_rate);
|
|
EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
|