278 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * PMac DACA lowlevel functions4 *5 * Copyright (c) by Takashi Iwai <tiwai@suse.de>6 */7 8 9#include <linux/init.h>10#include <linux/i2c.h>11#include <linux/kmod.h>12#include <linux/slab.h>13#include <sound/core.h>14#include "pmac.h"15 16/* i2c address */17#define DACA_I2C_ADDR 0x4d18 19/* registers */20#define DACA_REG_SR 0x0121#define DACA_REG_AVOL 0x0222#define DACA_REG_GCFG 0x0323 24/* maximum volume value */25#define DACA_VOL_MAX 0x3826 27 28struct pmac_daca {29 struct pmac_keywest i2c;30 int left_vol, right_vol;31 unsigned int deemphasis : 1;32 unsigned int amp_on : 1;33};34 35 36/*37 * initialize / detect DACA38 */39static int daca_init_client(struct pmac_keywest *i2c)40{41 unsigned short wdata = 0x00;42 /* SR: no swap, 1bit delay, 32-48kHz */43 /* GCFG: power amp inverted, DAC on */44 if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||45 i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)46 return -EINVAL;47 return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,48 2, (unsigned char*)&wdata);49}50 51/*52 * update volume53 */54static int daca_set_volume(struct pmac_daca *mix)55{56 unsigned char data[2];57 58 if (! mix->i2c.client)59 return -ENODEV;60 61 if (mix->left_vol > DACA_VOL_MAX)62 data[0] = DACA_VOL_MAX;63 else64 data[0] = mix->left_vol;65 if (mix->right_vol > DACA_VOL_MAX)66 data[1] = DACA_VOL_MAX;67 else68 data[1] = mix->right_vol;69 data[1] |= mix->deemphasis ? 0x40 : 0;70 if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,71 2, data) < 0) {72 dev_err(&mix->i2c.client->dev, "failed to set volume\n");73 return -EINVAL;74 }75 return 0;76}77 78 79/* deemphasis switch */80#define daca_info_deemphasis snd_ctl_boolean_mono_info81 82static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,83 struct snd_ctl_elem_value *ucontrol)84{85 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);86 struct pmac_daca *mix;87 mix = chip->mixer_data;88 if (!mix)89 return -ENODEV;90 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;91 return 0;92}93 94static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,95 struct snd_ctl_elem_value *ucontrol)96{97 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);98 struct pmac_daca *mix;99 int change;100 101 mix = chip->mixer_data;102 if (!mix)103 return -ENODEV;104 change = mix->deemphasis != ucontrol->value.integer.value[0];105 if (change) {106 mix->deemphasis = !!ucontrol->value.integer.value[0];107 daca_set_volume(mix);108 }109 return change;110}111 112/* output volume */113static int daca_info_volume(struct snd_kcontrol *kcontrol,114 struct snd_ctl_elem_info *uinfo)115{116 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;117 uinfo->count = 2;118 uinfo->value.integer.min = 0;119 uinfo->value.integer.max = DACA_VOL_MAX;120 return 0;121}122 123static int daca_get_volume(struct snd_kcontrol *kcontrol,124 struct snd_ctl_elem_value *ucontrol)125{126 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);127 struct pmac_daca *mix;128 mix = chip->mixer_data;129 if (!mix)130 return -ENODEV;131 ucontrol->value.integer.value[0] = mix->left_vol;132 ucontrol->value.integer.value[1] = mix->right_vol;133 return 0;134}135 136static int daca_put_volume(struct snd_kcontrol *kcontrol,137 struct snd_ctl_elem_value *ucontrol)138{139 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);140 struct pmac_daca *mix;141 unsigned int vol[2];142 int change;143 144 mix = chip->mixer_data;145 if (!mix)146 return -ENODEV;147 vol[0] = ucontrol->value.integer.value[0];148 vol[1] = ucontrol->value.integer.value[1];149 if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)150 return -EINVAL;151 change = mix->left_vol != vol[0] ||152 mix->right_vol != vol[1];153 if (change) {154 mix->left_vol = vol[0];155 mix->right_vol = vol[1];156 daca_set_volume(mix);157 }158 return change;159}160 161/* amplifier switch */162#define daca_info_amp daca_info_deemphasis163 164static int daca_get_amp(struct snd_kcontrol *kcontrol,165 struct snd_ctl_elem_value *ucontrol)166{167 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);168 struct pmac_daca *mix;169 mix = chip->mixer_data;170 if (!mix)171 return -ENODEV;172 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;173 return 0;174}175 176static int daca_put_amp(struct snd_kcontrol *kcontrol,177 struct snd_ctl_elem_value *ucontrol)178{179 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);180 struct pmac_daca *mix;181 int change;182 183 mix = chip->mixer_data;184 if (!mix)185 return -ENODEV;186 change = mix->amp_on != ucontrol->value.integer.value[0];187 if (change) {188 mix->amp_on = !!ucontrol->value.integer.value[0];189 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,190 mix->amp_on ? 0x05 : 0x04);191 }192 return change;193}194 195static const struct snd_kcontrol_new daca_mixers[] = {196 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,197 .name = "Deemphasis Switch",198 .info = daca_info_deemphasis,199 .get = daca_get_deemphasis,200 .put = daca_put_deemphasis201 },202 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,203 .name = "Master Playback Volume",204 .info = daca_info_volume,205 .get = daca_get_volume,206 .put = daca_put_volume207 },208 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,209 .name = "Power Amplifier Switch",210 .info = daca_info_amp,211 .get = daca_get_amp,212 .put = daca_put_amp213 },214};215 216 217#ifdef CONFIG_PM218static void daca_resume(struct snd_pmac *chip)219{220 struct pmac_daca *mix = chip->mixer_data;221 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);222 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,223 mix->amp_on ? 0x05 : 0x04);224 daca_set_volume(mix);225}226#endif /* CONFIG_PM */227 228 229static void daca_cleanup(struct snd_pmac *chip)230{231 struct pmac_daca *mix = chip->mixer_data;232 if (! mix)233 return;234 snd_pmac_keywest_cleanup(&mix->i2c);235 kfree(mix);236 chip->mixer_data = NULL;237}238 239/* exported */240int snd_pmac_daca_init(struct snd_pmac *chip)241{242 int i, err;243 struct pmac_daca *mix;244 245 request_module("i2c-powermac");246 247 mix = kzalloc(sizeof(*mix), GFP_KERNEL);248 if (! mix)249 return -ENOMEM;250 chip->mixer_data = mix;251 chip->mixer_free = daca_cleanup;252 mix->amp_on = 1; /* default on */253 254 mix->i2c.addr = DACA_I2C_ADDR;255 mix->i2c.init_client = daca_init_client;256 mix->i2c.name = "DACA";257 err = snd_pmac_keywest_init(&mix->i2c);258 if (err < 0)259 return err;260 261 /*262 * build mixers263 */264 strcpy(chip->card->mixername, "PowerMac DACA");265 266 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {267 err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip));268 if (err < 0)269 return err;270 }271 272#ifdef CONFIG_PM273 chip->resume = daca_resume;274#endif275 276 return 0;277}278