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|
/*
* Routines for control of the AK4117 via 4-wire serial interface
* IEC958 (S/PDIF) receiver by Asahi Kasei
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/ak4117.h>
#include <sound/asoundef.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("AK4117 IEC958 (S/PDIF) receiver by Asahi Kasei");
MODULE_LICENSE("GPL");
#define AK4117_ADDR 0x00 /* fixed address */
static void snd_ak4117_timer(unsigned long data);
static void reg_write(struct ak4117 *ak4117, unsigned char reg, unsigned char val)
{
ak4117->write(ak4117->private_data, reg, val);
if (reg < sizeof(ak4117->regmap))
ak4117->regmap[reg] = val;
}
static inline unsigned char reg_read(struct ak4117 *ak4117, unsigned char reg)
{
return ak4117->read(ak4117->private_data, reg);
}
#if 0
static void reg_dump(struct ak4117 *ak4117)
{
int i;
printk(KERN_DEBUG "AK4117 REG DUMP:\n");
for (i = 0; i < 0x1b; i++)
printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4117, i), i < sizeof(ak4117->regmap) ? ak4117->regmap[i] : 0);
}
#endif
static void snd_ak4117_free(struct ak4117 *chip)
{
del_timer(&chip->timer);
kfree(chip);
}
static int snd_ak4117_dev_free(struct snd_device *device)
{
struct ak4117 *chip = device->device_data;
snd_ak4117_free(chip);
return 0;
}
int snd_ak4117_create(struct snd_card *card, ak4117_read_t *read, ak4117_write_t *write,
const unsigned char pgm[5], void *private_data, struct ak4117 **r_ak4117)
{
struct ak4117 *chip;
int err = 0;
unsigned char reg;
static struct snd_device_ops ops = {
.dev_free = snd_ak4117_dev_free,
};
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
spin_lock_init(&chip->lock);
chip->card = card;
chip->read = read;
chip->write = write;
chip->private_data = private_data;
init_timer(&chip->timer);
chip->timer.data = (unsigned long)chip;
chip->timer.function = snd_ak4117_timer;
for (reg = 0; reg < 5; reg++)
chip->regmap[reg] = pgm[reg];
snd_ak4117_reinit(chip);
chip->rcs0 = reg_read(chip, AK4117_REG_RCS0) & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
chip->rcs1 = reg_read(chip, AK4117_REG_RCS1);
chip->rcs2 = reg_read(chip, AK4117_REG_RCS2);
if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
goto __fail;
if (r_ak4117)
*r_ak4117 = chip;
return 0;
__fail:
snd_ak4117_free(chip);
return err < 0 ? err : -EIO;
}
void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val)
{
if (reg >= 5)
return;
reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
}
void snd_ak4117_reinit(struct ak4117 *chip)
{
unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg;
del_timer(&chip->timer);
chip->init = 1;
/* bring the chip to reset state and powerdown state */
reg_write(chip, AK4117_REG_PWRDN, 0);
udelay(200);
/* release reset, but leave powerdown */
reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN);
udelay(200);
for (reg = 1; reg < 5; reg++)
reg_write(chip, reg, chip->regmap[reg]);
/* release powerdown, everything is initialized now */
reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN);
chip->init = 0;
chip->timer.expires = 1 + jiffies;
add_timer(&chip->timer);
}
static unsigned int external_rate(unsigned char rcs1)
{
switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) {
case AK4117_FS_32000HZ: return 32000;
case AK4117_FS_44100HZ: return 44100;
case AK4117_FS_48000HZ: return 48000;
case AK4117_FS_88200HZ: return 88200;
case AK4117_FS_96000HZ: return 96000;
case AK4117_FS_176400HZ: return 176400;
case AK4117_FS_192000HZ: return 192000;
default: return 0;
}
}
static int snd_ak4117_in_error_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = LONG_MAX;
return 0;
}
static int snd_ak4117_in_error_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
long *ptr;
spin_lock_irq(&chip->lock);
ptr = (long *)(((char *)chip) + kcontrol->private_value);
ucontrol->value.integer.value[0] = *ptr;
*ptr = 0;
spin_unlock_irq(&chip->lock);
return 0;
}
#define snd_ak4117_in_bit_info snd_ctl_boolean_mono_info
static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
unsigned char reg = kcontrol->private_value & 0xff;
unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
unsigned char inv = (kcontrol->private_value >> 31) & 1;
ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
return 0;
}
static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count =
|