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/*
* helper functions for Asus Xonar cards
*
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
*
*
* This driver is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2.
*
* This driver 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 driver; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include "xonar.h"
#define GPIO_CS53x1_M_MASK 0x000c
#define GPIO_CS53x1_M_SINGLE 0x0000
#define GPIO_CS53x1_M_DOUBLE 0x0004
#define GPIO_CS53x1_M_QUAD 0x0008
void xonar_enable_output(struct oxygen *chip)
{
struct xonar_generic *data = chip->model_data;
oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, data->output_enable_bit);
msleep(data->anti_pop_delay);
oxygen_set_bits16(chip, OXYGEN_GPIO_DATA, data->output_enable_bit);
}
void xonar_disable_output(struct oxygen *chip)
{
struct xonar_generic *data = chip->model_data;
oxygen_clear_bits16(chip, OXYGEN_GPIO_DATA, data->output_enable_bit);
}
static void xonar_ext_power_gpio_changed(struct oxygen *chip)
{
struct xonar_generic *data = chip->model_data;
u8 has_power;
has_power = !!(oxygen_read8(chip, data->ext_power_reg)
& data->ext_power_bit);
if (has_power != data->has_power) {
data->has_power = has_power;
if (has_power) {
snd_printk(KERN_NOTICE "power restored\n");
} else {
snd_printk(KERN_CRIT
"Hey! Don't unplug the power cable!\n");
/* TODO: stop PCMs */
}
}
}
void xonar_init_ext_power(struct oxygen *chip)
{
struct xonar_generic *data = chip->model_data;
oxygen_set_bits8(chip, data->ext_power_int_reg,
data->ext_power_bit);
chip->interrupt_mask |= OXYGEN_INT_GPIO;
chip->model.gpio_changed = xonar_ext_power_gpio_changed;
data->has_power = !!(oxygen_read8(chip, data->ext_power_reg)
& data->ext_power_bit);
}
void xonar_init_cs53x1(struct oxygen *chip)
{
oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_CS53x1_M_MASK);
oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
GPIO_CS53x1_M_SINGLE, GPIO_CS53x1_M_MASK);
}
void xonar_set_cs53x1_params(struct oxygen *chip,
struct snd_pcm_hw_params *params)
{
unsigned int value;
if (params_rate(params) <= 54000)
value = GPIO_CS53x1_M_SINGLE;
else if (params_rate(params) <= 108000)
value = GPIO_CS53x1_M_DOUBLE;
else
value = GPIO_CS53x1_M_QUAD;
oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
value, GPIO_CS53x1_M_MASK);
}
int xonar_gpio_bit_switch_get(struct snd_kcontrol *ctl,
struct snd_ctl_elem_value *value)
{
struct oxygen *chip = ctl->private_data;
u16 bit = ctl->private_value;
value->value.integer.value[0] =
!!(oxygen_read16(chip, OXYGEN_GPIO_DATA) & bit);
return 0;
}
int xonar_gpio_bit_switch_put(struct snd_kcontrol *ctl,
struct snd_ctl_elem_value *value)
{
struct oxygen *chip = ctl->private_data;
u16 bit = ctl->private_value;
u16 old_bits, new_bits;
int changed;
spin_lock_irq(&chip->reg_lock);
old_bits = oxygen_read16(chip, OXYGEN_GPIO_DATA);
if (value->value.integer.value[0])
new_bits = old_bits | bit;
else
new_bits = old_bits & ~bit;
changed = new_bits != old_bits;
if (changed)
oxygen_write16(chip, OXYGEN_GPIO_DATA, new_bits);
spin_unlock_irq(&chip->reg_lock);
return changed;
}
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