LXR linux/sound/pci/oxygen/xonar

   1/*
   2 * helper functions for Asus Xonar cards
   3 *
   4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
   5 *
   6 *
   7 *  This driver is free software; you can redistribute it and/or modify
   8 *  it under the terms of the GNU General Public License, version 2.
   9 *
  10 *  This driver is distributed in the hope that it will be useful,
  11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 *  GNU General Public License for more details.
  14 *
  15 *  You should have received a copy of the GNU General Public License
  16 *  along with this driver; if not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19#include <linux/delay.h>
  20#include <sound/core.h>
  21#include <sound/control.h>
  22#include <sound/pcm.h>
  23#include <sound/pcm_params.h>
  24#include "xonar.h"
  25
  26
  27#define GPIO_CS53x1_M_MASK      0x000c
  28#define GPIO_CS53x1_M_SINGLE    0x0000
  29#define GPIO_CS53x1_M_DOUBLE    0x0004
  30#define GPIO_CS53x1_M_QUAD      0x0008
  31
  32
  33void xonar_enable_output(struct oxygen *chip)
  34{
  35        struct xonar_generic *data = chip->model_data;
  36
  37        oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, data->output_enable_bit);
  38        msleep(data->anti_pop_delay);
  39        oxygen_set_bits16(chip, OXYGEN_GPIO_DATA, data->output_enable_bit);
  40}
  41
  42void xonar_disable_output(struct oxygen *chip)
  43{
  44        struct xonar_generic *data = chip->model_data;
  45
  46        oxygen_clear_bits16(chip, OXYGEN_GPIO_DATA, data->output_enable_bit);
  47}
  48
  49static void xonar_ext_power_gpio_changed(struct oxygen *chip)
  50{
  51        struct xonar_generic *data = chip->model_data;
  52        u8 has_power;
  53
  54        has_power = !!(oxygen_read8(chip, data->ext_power_reg)
  55                       & data->ext_power_bit);
  56        if (has_power != data->has_power) {
  57                data->has_power = has_power;
  58                if (has_power) {
  59                        snd_printk(KERN_NOTICE "power restored\n");
  60                } else {
  61                        snd_printk(KERN_CRIT
  62                                   "Hey! Don't unplug the power cable!\n");
  63                        /* TODO: stop PCMs */
  64                }
  65        }
  66}
  67
  68void xonar_init_ext_power(struct oxygen *chip)
  69{
  70        struct xonar_generic *data = chip->model_data;
  71
  72        oxygen_set_bits8(chip, data->ext_power_int_reg,
  73                         data->ext_power_bit);
  74        chip->interrupt_mask |= OXYGEN_INT_GPIO;
  75        chip->model.gpio_changed = xonar_ext_power_gpio_changed;
  76        data->has_power = !!(oxygen_read8(chip, data->ext_power_reg)
  77                             & data->ext_power_bit);
  78}
  79
  80void xonar_init_cs53x1(struct oxygen *chip)
  81{
  82        oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_CS53x1_M_MASK);
  83        oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
  84                              GPIO_CS53x1_M_SINGLE, GPIO_CS53x1_M_MASK);
  85}
  86
  87void xonar_set_cs53x1_params(struct oxygen *chip,
  88                             struct snd_pcm_hw_params *params)
  89{
  90        unsigned int value;
  91
  92        if (params_rate(params) <= 54000)
  93                value = GPIO_CS53x1_M_SINGLE;
  94        else if (params_rate(params) <= 108000)
  95                value = GPIO_CS53x1_M_DOUBLE;
  96        else
  97                value = GPIO_CS53x1_M_QUAD;
  98        oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
  99                              value, GPIO_CS53x1_M_MASK);
 100}
 101
 102int xonar_gpio_bit_switch_get(struct snd_kcontrol *ctl,
 103                              struct snd_ctl_elem_value *value)
 104{
 105        struct oxygen *chip = ctl->private_data;
 106        u16 bit = ctl->private_value;
 107        bool invert = ctl->private_value & XONAR_GPIO_BIT_INVERT;
 108
 109        value->value.integer.value[0] =
 110                !!(oxygen_read16(chip, OXYGEN_GPIO_DATA) & bit) ^ invert;
 111        return 0;
 112}
 113
 114int xonar_gpio_bit_switch_put(struct snd_kcontrol *ctl,
 115                              struct snd_ctl_elem_value *value)
 116{
 117        struct oxygen *chip = ctl->private_data;
 118        u16 bit = ctl->private_value;
 119        bool invert = ctl->private_value & XONAR_GPIO_BIT_INVERT;
 120        u16 old_bits, new_bits;
 121        int changed;
 122
 123        spin_lock_irq(&chip->reg_lock);
 124        old_bits = oxygen_read16(chip, OXYGEN_GPIO_DATA);
 125        if (!!value->value.integer.value[0] ^ invert)
 126                new_bits = old_bits | bit;
 127        else
 128                new_bits = old_bits & ~bit;
 129        changed = new_bits != old_bits;
 130        if (changed)
 131                oxygen_write16(chip, OXYGEN_GPIO_DATA, new_bits);
 132        spin_unlock_irq(&chip->reg_lock);
 133        return changed;
 134}
 135