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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PMac DACA lowlevel functions
*
* Copyright (c) by Takashi Iwai <tiwai@suse.de>
*/
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/kmod.h>
#include <linux/slab.h>
#include <sound/core.h>
#include "pmac.h"
/* i2c address */
#define DACA_I2C_ADDR 0x4d
/* registers */
#define DACA_REG_SR 0x01
#define DACA_REG_AVOL 0x02
#define DACA_REG_GCFG 0x03
/* maximum volume value */
#define DACA_VOL_MAX 0x38
struct pmac_daca {
struct pmac_keywest i2c;
int left_vol, right_vol;
unsigned int deemphasis : 1;
unsigned int amp_on : 1;
};
/*
* initialize / detect DACA
*/
static int daca_init_client(struct pmac_keywest *i2c)
{
unsigned short wdata = 0x00;
/* SR: no swap, 1bit delay, 32-48kHz */
/* GCFG: power amp inverted, DAC on */
if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
return -EINVAL;
return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
2, (unsigned char*)&wdata);
}
/*
* update volume
*/
static int daca_set_volume(struct pmac_daca *mix)
{
unsigned char data[2];
if (! mix->i2c.client)
return -ENODEV;
if (mix->left_vol > DACA_VOL_MAX)
data[0] = DACA_VOL_MAX;
else
data[0] = mix->left_vol;
if (mix->right_vol > DACA_VOL_MAX)
data[1] = DACA_VOL_MAX;
else
data[1] = mix->right_vol;
data[1] |= mix->deemphasis ? 0x40 : 0;
if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
2, data) < 0) {
dev_err(&mix->i2c.client->dev, "failed to set volume\n");
return -EINVAL;
}
return 0;
}
/* deemphasis switch */
#define daca_info_deemphasis snd_ctl_boolean_mono_info
static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
struct pmac_daca *mix;
mix = chip->mixer_data;
if (!mix)
return -ENODEV;
ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
return 0;
}
static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
struct pmac_daca *mix;
int change;
mix = chip->mixer_data;
if (!mix)
return -ENODEV;
change = mix->deemphasis != ucontrol->value.integer.value[0];
if (change) {
mix->deemphasis = !!ucontrol->value.integer.value[0];
daca_set_volume(mix);
}
return change;
}
/* output volume */
static int daca_info_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = DACA_VOL_MAX;
return 0;
}
static int daca_get_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
struct pmac_daca *mix;
mix = chip->mixer_data;
if (!mix)
return -ENODEV;
ucontrol->value.integer.value[0] = mix->left_vol;
ucontrol->value.integer.value[1] = mix->right_vol;
return 0;
}
static int daca_put_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
struct pmac_daca *mix;
unsigned int vol[2];
int change;
mix = chip->mixer_data;
if (!mix)
return -ENODEV;
vol[0] = ucontrol->value.integer.value[0];
vol[1] = ucontrol->value.integer.value[1];
if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)
return -EINVAL;
change = mix->left_vol != vol[0] ||
mix->right_vol != vol[1];
if (change) {
mix->left_vol = vol[0];
mix->right_vol = vol[1];
daca_set_volume(mix);
}
return change;
}
/* amplifier switch */
#define daca_info_amp daca_info_deemphasis
static int daca_get_amp(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
struct pmac_daca *mix;
mix = chip->mixer_data;
if (!mix)
return -ENODEV;
ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
return 0;
}
static int daca_put_amp(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
struct pmac_daca *mix;
int change;
mix = chip->mixer_data;
if (!mix)
return -ENODEV;
change = mix->amp_on != ucontrol->value.integer.value[0];
if (change) {
mix->amp_on = !!ucontrol->value.integer.value[0];
i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
mix->amp_on ? 0x05 : 0x04);
}
return change;
}
static const struct snd_kcontrol_new daca_mixers[] = {
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Deemphasis Switch",
.info = daca_info_deemphasis,
.get = daca_get_deemphasis,
.put = daca_put_deemphasis
},
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Master Playback Volume",
.info = daca_info_volume,
.get = daca_get_volume,
.put = daca_put_volume
},
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Power Amplifier Switch",
.info = daca_info_amp,
.get = daca_get_amp,
.put = daca_put_amp
},
};
#ifdef CONFIG_PM
static void daca_resume(struct snd_pmac *chip)
{
struct pmac_daca *mix = chip->mixer_data;
i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
mix->amp_on ? 0x05 : 0x04);
daca_set_volume(mix);
}
#endif /* CONFIG_PM */
static void daca_cleanup(struct snd_pmac *chip)
{
struct pmac_daca *mix = chip->mixer_data;
if (! mix)
return;
snd_pmac_keywest_cleanup(&mix->i2c);
kfree(mix);
chip->mixer_data = NULL;
}
/* exported */
int snd_pmac_daca_init(struct snd_pmac *chip)
{
int i, err;
struct pmac_daca *mix;
request_module("i2c-powermac");
mix = kzalloc(sizeof(*mix), GFP_KERNEL);
if (! mix)
return -ENOMEM;
chip->mixer_data = mix;
chip->mixer_free = daca_cleanup;
mix->amp_on = 1; /* default on */
mix->i2c.addr = DACA_I2C_ADDR;
mix->i2c.init_client = daca_init_client;
mix->i2c.name = "DACA";
err = snd_pmac_keywest_init(&mix->i2c);
if (err < 0)
return err;
/*
* build mixers
*/
strcpy(chip->card->mixername, "PowerMac DACA");
for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip));
if (err < 0)
return err;
}
#ifdef CONFIG_PM
chip->resume = daca_resume;
#endif
return 0;
}
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