278 lines
6.2 KiB
C
278 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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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#include <linux/init.h>
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#include <linux/i2c.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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struct pmac_daca {
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struct pmac_keywest 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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};
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/*
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* initialize / detect DACA
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*/
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static int daca_init_client(struct pmac_keywest *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(struct pmac_daca *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(KERN_ERR "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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#define daca_info_deemphasis snd_ctl_boolean_mono_info
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static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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mix = chip->mixer_data;
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if (!mix)
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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(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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int change;
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mix = chip->mixer_data;
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if (!mix)
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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(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *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(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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mix = chip->mixer_data;
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if (!mix)
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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(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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unsigned int vol[2];
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int change;
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mix = chip->mixer_data;
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if (!mix)
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return -ENODEV;
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vol[0] = ucontrol->value.integer.value[0];
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vol[1] = ucontrol->value.integer.value[1];
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if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)
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return -EINVAL;
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change = mix->left_vol != vol[0] ||
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mix->right_vol != vol[1];
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if (change) {
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mix->left_vol = vol[0];
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mix->right_vol = vol[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(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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mix = chip->mixer_data;
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if (!mix)
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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(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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int change;
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mix = chip->mixer_data;
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if (!mix)
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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 const struct snd_kcontrol_new 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_PM
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static void daca_resume(struct snd_pmac *chip)
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{
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struct pmac_daca *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_PM */
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static void daca_cleanup(struct snd_pmac *chip)
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{
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struct pmac_daca *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 snd_pmac_daca_init(struct snd_pmac *chip)
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{
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int i, err;
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struct pmac_daca *mix;
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request_module("i2c-powermac");
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mix = kzalloc(sizeof(*mix), GFP_KERNEL);
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if (! mix)
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return -ENOMEM;
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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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err = snd_pmac_keywest_init(&mix->i2c);
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if (err < 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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err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip));
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if (err < 0)
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return err;
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}
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#ifdef CONFIG_PM
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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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