mirror of https://gitee.com/openkylin/linux.git
284 lines
6.9 KiB
C
284 lines
6.9 KiB
C
/*
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* PMac DACA lowlevel functions
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*
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* Copyright (c) by Takashi Iwai <tiwai@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <sound/driver.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/i2c-dev.h>
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#include <linux/kmod.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include "pmac.h"
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/* i2c address */
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#define DACA_I2C_ADDR 0x4d
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/* registers */
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#define DACA_REG_SR 0x01
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#define DACA_REG_AVOL 0x02
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#define DACA_REG_GCFG 0x03
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/* maximum volume value */
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#define DACA_VOL_MAX 0x38
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typedef struct pmac_daca_t {
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pmac_keywest_t i2c;
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int left_vol, right_vol;
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unsigned int deemphasis : 1;
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unsigned int amp_on : 1;
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} pmac_daca_t;
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/*
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* initialize / detect DACA
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*/
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static int daca_init_client(pmac_keywest_t *i2c)
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{
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unsigned short wdata = 0x00;
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/* SR: no swap, 1bit delay, 32-48kHz */
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/* GCFG: power amp inverted, DAC on */
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if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
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i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
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return -EINVAL;
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return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
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2, (unsigned char*)&wdata);
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}
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/*
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* update volume
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*/
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static int daca_set_volume(pmac_daca_t *mix)
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{
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unsigned char data[2];
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if (! mix->i2c.client)
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return -ENODEV;
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if (mix->left_vol > DACA_VOL_MAX)
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data[0] = DACA_VOL_MAX;
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else
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data[0] = mix->left_vol;
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if (mix->right_vol > DACA_VOL_MAX)
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data[1] = DACA_VOL_MAX;
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else
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data[1] = mix->right_vol;
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data[1] |= mix->deemphasis ? 0x40 : 0;
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if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
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2, data) < 0) {
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snd_printk("failed to set volume \n");
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return -EINVAL;
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}
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return 0;
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}
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/* deemphasis switch */
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static int daca_info_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = 1;
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return 0;
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}
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static int daca_get_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
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{
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pmac_t *chip = snd_kcontrol_chip(kcontrol);
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pmac_daca_t *mix;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
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return 0;
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}
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static int daca_put_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
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{
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pmac_t *chip = snd_kcontrol_chip(kcontrol);
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pmac_daca_t *mix;
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int change;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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change = mix->deemphasis != ucontrol->value.integer.value[0];
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if (change) {
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mix->deemphasis = ucontrol->value.integer.value[0];
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daca_set_volume(mix);
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}
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return change;
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}
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/* output volume */
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static int daca_info_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 2;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = DACA_VOL_MAX;
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return 0;
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}
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static int daca_get_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
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{
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pmac_t *chip = snd_kcontrol_chip(kcontrol);
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pmac_daca_t *mix;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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ucontrol->value.integer.value[0] = mix->left_vol;
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ucontrol->value.integer.value[1] = mix->right_vol;
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return 0;
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}
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static int daca_put_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
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{
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pmac_t *chip = snd_kcontrol_chip(kcontrol);
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pmac_daca_t *mix;
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int change;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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change = mix->left_vol != ucontrol->value.integer.value[0] ||
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mix->right_vol != ucontrol->value.integer.value[1];
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if (change) {
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mix->left_vol = ucontrol->value.integer.value[0];
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mix->right_vol = ucontrol->value.integer.value[1];
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daca_set_volume(mix);
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}
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return change;
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}
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/* amplifier switch */
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#define daca_info_amp daca_info_deemphasis
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static int daca_get_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
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{
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pmac_t *chip = snd_kcontrol_chip(kcontrol);
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pmac_daca_t *mix;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
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return 0;
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}
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static int daca_put_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
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{
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pmac_t *chip = snd_kcontrol_chip(kcontrol);
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pmac_daca_t *mix;
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int change;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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change = mix->amp_on != ucontrol->value.integer.value[0];
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if (change) {
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mix->amp_on = ucontrol->value.integer.value[0];
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i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
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mix->amp_on ? 0x05 : 0x04);
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}
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return change;
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}
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static snd_kcontrol_new_t daca_mixers[] = {
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Deemphasis Switch",
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.info = daca_info_deemphasis,
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.get = daca_get_deemphasis,
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.put = daca_put_deemphasis
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},
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Master Playback Volume",
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.info = daca_info_volume,
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.get = daca_get_volume,
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.put = daca_put_volume
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},
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Power Amplifier Switch",
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.info = daca_info_amp,
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.get = daca_get_amp,
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.put = daca_put_amp
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},
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};
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#ifdef CONFIG_PMAC_PBOOK
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static void daca_resume(pmac_t *chip)
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{
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pmac_daca_t *mix = chip->mixer_data;
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i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
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i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
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mix->amp_on ? 0x05 : 0x04);
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daca_set_volume(mix);
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}
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#endif /* CONFIG_PMAC_PBOOK */
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static void daca_cleanup(pmac_t *chip)
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{
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pmac_daca_t *mix = chip->mixer_data;
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if (! mix)
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return;
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snd_pmac_keywest_cleanup(&mix->i2c);
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kfree(mix);
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chip->mixer_data = NULL;
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}
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/* exported */
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int __init snd_pmac_daca_init(pmac_t *chip)
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{
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int i, err;
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pmac_daca_t *mix;
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#ifdef CONFIG_KMOD
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if (current->fs->root)
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request_module("i2c-keywest");
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#endif /* CONFIG_KMOD */
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mix = kmalloc(sizeof(*mix), GFP_KERNEL);
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if (! mix)
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return -ENOMEM;
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memset(mix, 0, sizeof(*mix));
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chip->mixer_data = mix;
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chip->mixer_free = daca_cleanup;
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mix->amp_on = 1; /* default on */
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mix->i2c.addr = DACA_I2C_ADDR;
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mix->i2c.init_client = daca_init_client;
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mix->i2c.name = "DACA";
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if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
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return err;
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/*
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* build mixers
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*/
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strcpy(chip->card->mixername, "PowerMac DACA");
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for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
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if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
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return err;
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}
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#ifdef CONFIG_PMAC_PBOOK
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chip->resume = daca_resume;
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#endif
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return 0;
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}
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