sound/pci/oxygen/xonar_lib.c

   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
  33 void 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
  42 void 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
  49 static 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
  68 void 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
  80 void 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
  87 void 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
 102 int 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
 108         value->value.integer.value[0] =
 109                 !!(oxygen_read16(chip, OXYGEN_GPIO_DATA) & bit);
 110         return 0;
 111 }
 112
 113 int xonar_gpio_bit_switch_put(struct snd_kcontrol *ctl,
 114                               struct snd_ctl_elem_value *value)
 115 {
 116         struct oxygen *chip = ctl->private_data;
 117         u16 bit = ctl->private_value;
 118         u16 old_bits, new_bits;
 119         int changed;
 120
 121         spin_lock_irq(&chip->reg_lock);
 122         old_bits = oxygen_read16(chip, OXYGEN_GPIO_DATA);
 123         if (value->value.integer.value[0])
 124                 new_bits = old_bits | bit;
 125         else
 126                 new_bits = old_bits & ~bit;
 127         changed = new_bits != old_bits;
 128         if (changed)
 129                 oxygen_write16(chip, OXYGEN_GPIO_DATA, new_bits);
 130         spin_unlock_irq(&chip->reg_lock);
 131         return changed;
 132 }