sound/ppc/daca.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * PMac DACA lowlevel functions
   4  *
   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   0x4d
  18
  19 /* registers */
  20 #define DACA_REG_SR     0x01
  21 #define DACA_REG_AVOL   0x02
  22 #define DACA_REG_GCFG   0x03
  23
  24 /* maximum volume value */
  25 #define DACA_VOL_MAX    0x38
  26
  27
  28 struct 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 DACA
  38  */
  39 static 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 volume
  53  */
  54 static 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         else
  64                 data[0] = mix->left_vol;
  65         if (mix->right_vol > DACA_VOL_MAX)
  66                 data[1] = DACA_VOL_MAX;
  67         else
  68                 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_info
  81
  82 static 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
  94 static 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 */
 113 static 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
 123 static 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
 136 static 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_deemphasis
 163
 164 static 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
 176 static 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
 195 static 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_deemphasis
 201         },
 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_volume
 207         },
 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_amp
 213         },
 214 };
 215
 216
 217 #ifdef CONFIG_PM
 218 static 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
 229 static 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 */
 240 int 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 mixers
 263          */
 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_PM
 273         chip->resume = daca_resume;
 274 #endif
 275
 276         return 0;
 277 }