| // 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) { |
| snd_printk(KERN_ERR "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; |
| if (! (mix = chip->mixer_data)) |
| 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; |
| |
| if (! (mix = chip->mixer_data)) |
| 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; |
| if (! (mix = chip->mixer_data)) |
| 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; |
| |
| if (! (mix = chip->mixer_data)) |
| 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; |
| if (! (mix = chip->mixer_data)) |
| 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; |
| |
| if (! (mix = chip->mixer_data)) |
| 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 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"; |
| if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0) |
| return err; |
| |
| /* |
| * build mixers |
| */ |
| strcpy(chip->card->mixername, "PowerMac DACA"); |
| |
| for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) { |
| if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0) |
| return err; |
| } |
| |
| #ifdef CONFIG_PM |
| chip->resume = daca_resume; |
| #endif |
| |
| return 0; |
| } |