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