sound/ppc/daca.c

   1 /*
   2  * PMac DACA lowlevel functions
   3  *
   4  * Copyright (c) by Takashi Iwai <tiwai@suse.de>
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  */
  20
  21
  22 #include <sound/driver.h>
  23 #include <linux/init.h>
  24 #include <linux/i2c.h>
  25 #include <linux/kmod.h>
  26 #include <linux/slab.h>
  27 #include <sound/core.h>
  28 #include "pmac.h"
  29
  30 /* i2c address */
  31 #define DACA_I2C_ADDR   0x4d
  32
  33 /* registers */
  34 #define DACA_REG_SR     0x01
  35 #define DACA_REG_AVOL   0x02
  36 #define DACA_REG_GCFG   0x03
  37
  38 /* maximum volume value */
  39 #define DACA_VOL_MAX    0x38
  40
  41
  42 struct pmac_daca {
  43         struct pmac_keywest i2c;
  44         int left_vol, right_vol;
  45         unsigned int deemphasis : 1;
  46         unsigned int amp_on : 1;
  47 };
  48
  49
  50 /*
  51  * initialize / detect DACA
  52  */
  53 static int daca_init_client(struct pmac_keywest *i2c)
  54 {
  55         unsigned short wdata = 0x00;
  56         /* SR: no swap, 1bit delay, 32-48kHz */
  57         /* GCFG: power amp inverted, DAC on */
  58         if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
  59             i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
  60                 return -EINVAL;
  61         return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
  62                                           2, (unsigned char*)&wdata);
  63 }
  64
  65 /*
  66  * update volume
  67  */
  68 static int daca_set_volume(struct pmac_daca *mix)
  69 {
  70         unsigned char data[2];
  71
  72         if (! mix->i2c.client)
  73                 return -ENODEV;
  74
  75         if (mix->left_vol > DACA_VOL_MAX)
  76                 data[0] = DACA_VOL_MAX;
  77         else
  78                 data[0] = mix->left_vol;
  79         if (mix->right_vol > DACA_VOL_MAX)
  80                 data[1] = DACA_VOL_MAX;
  81         else
  82                 data[1] = mix->right_vol;
  83         data[1] |= mix->deemphasis ? 0x40 : 0;
  84         if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
  85                                        2, data) < 0) {
  86                 snd_printk("failed to set volume \n");
  87                 return -EINVAL;
  88         }
  89         return 0;
  90 }
  91
  92
  93 /* deemphasis switch */
  94 #define daca_info_deemphasis            snd_ctl_boolean_mono_info
  95
  96 static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
  97                                struct snd_ctl_elem_value *ucontrol)
  98 {
  99         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 100         struct pmac_daca *mix;
 101         if (! (mix = chip->mixer_data))
 102                 return -ENODEV;
 103         ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
 104         return 0;
 105 }
 106
 107 static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
 108                                struct snd_ctl_elem_value *ucontrol)
 109 {
 110         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 111         struct pmac_daca *mix;
 112         int change;
 113
 114         if (! (mix = chip->mixer_data))
 115                 return -ENODEV;
 116         change = mix->deemphasis != ucontrol->value.integer.value[0];
 117         if (change) {
 118                 mix->deemphasis = ucontrol->value.integer.value[0];
 119                 daca_set_volume(mix);
 120         }
 121         return change;
 122 }
 123
 124 /* output volume */
 125 static int daca_info_volume(struct snd_kcontrol *kcontrol,
 126                             struct snd_ctl_elem_info *uinfo)
 127 {
 128         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 129         uinfo->count = 2;
 130         uinfo->value.integer.min = 0;
 131         uinfo->value.integer.max = DACA_VOL_MAX;
 132         return 0;
 133 }
 134
 135 static int daca_get_volume(struct snd_kcontrol *kcontrol,
 136                            struct snd_ctl_elem_value *ucontrol)
 137 {
 138         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 139         struct pmac_daca *mix;
 140         if (! (mix = chip->mixer_data))
 141                 return -ENODEV;
 142         ucontrol->value.integer.value[0] = mix->left_vol;
 143         ucontrol->value.integer.value[1] = mix->right_vol;
 144         return 0;
 145 }
 146
 147 static int daca_put_volume(struct snd_kcontrol *kcontrol,
 148                            struct snd_ctl_elem_value *ucontrol)
 149 {
 150         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 151         struct pmac_daca *mix;
 152         int change;
 153
 154         if (! (mix = chip->mixer_data))
 155                 return -ENODEV;
 156         change = mix->left_vol != ucontrol->value.integer.value[0] ||
 157                 mix->right_vol != ucontrol->value.integer.value[1];
 158         if (change) {
 159                 mix->left_vol = ucontrol->value.integer.value[0];
 160                 mix->right_vol = ucontrol->value.integer.value[1];
 161                 daca_set_volume(mix);
 162         }
 163         return change;
 164 }
 165
 166 /* amplifier switch */
 167 #define daca_info_amp   daca_info_deemphasis
 168
 169 static int daca_get_amp(struct snd_kcontrol *kcontrol,
 170                         struct snd_ctl_elem_value *ucontrol)
 171 {
 172         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 173         struct pmac_daca *mix;
 174         if (! (mix = chip->mixer_data))
 175                 return -ENODEV;
 176         ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
 177         return 0;
 178 }
 179
 180 static int daca_put_amp(struct snd_kcontrol *kcontrol,
 181                         struct snd_ctl_elem_value *ucontrol)
 182 {
 183         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 184         struct pmac_daca *mix;
 185         int change;
 186
 187         if (! (mix = chip->mixer_data))
 188                 return -ENODEV;
 189         change = mix->amp_on != ucontrol->value.integer.value[0];
 190         if (change) {
 191                 mix->amp_on = ucontrol->value.integer.value[0];
 192                 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 193                                           mix->amp_on ? 0x05 : 0x04);
 194         }
 195         return change;
 196 }
 197
 198 static struct snd_kcontrol_new daca_mixers[] = {
 199         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 200           .name = "Deemphasis Switch",
 201           .info = daca_info_deemphasis,
 202           .get = daca_get_deemphasis,
 203           .put = daca_put_deemphasis
 204         },
 205         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 206           .name = "Master Playback Volume",
 207           .info = daca_info_volume,
 208           .get = daca_get_volume,
 209           .put = daca_put_volume
 210         },
 211         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 212           .name = "Power Amplifier Switch",
 213           .info = daca_info_amp,
 214           .get = daca_get_amp,
 215           .put = daca_put_amp
 216         },
 217 };
 218
 219
 220 #ifdef CONFIG_PM
 221 static void daca_resume(struct snd_pmac *chip)
 222 {
 223         struct pmac_daca *mix = chip->mixer_data;
 224         i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
 225         i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 226                                   mix->amp_on ? 0x05 : 0x04);
 227         daca_set_volume(mix);
 228 }
 229 #endif /* CONFIG_PM */
 230
 231
 232 static void daca_cleanup(struct snd_pmac *chip)
 233 {
 234         struct pmac_daca *mix = chip->mixer_data;
 235         if (! mix)
 236                 return;
 237         snd_pmac_keywest_cleanup(&mix->i2c);
 238         kfree(mix);
 239         chip->mixer_data = NULL;
 240 }
 241
 242 /* exported */
 243 int __init snd_pmac_daca_init(struct snd_pmac *chip)
 244 {
 245         int i, err;
 246         struct pmac_daca *mix;
 247
 248 #ifdef CONFIG_KMOD
 249         if (current->fs->root)
 250                 request_module("i2c-powermac");
 251 #endif /* CONFIG_KMOD */
 252
 253         mix = kzalloc(sizeof(*mix), GFP_KERNEL);
 254         if (! mix)
 255                 return -ENOMEM;
 256         chip->mixer_data = mix;
 257         chip->mixer_free = daca_cleanup;
 258         mix->amp_on = 1; /* default on */
 259
 260         mix->i2c.addr = DACA_I2C_ADDR;
 261         mix->i2c.init_client = daca_init_client;
 262         mix->i2c.name = "DACA";
 263         if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
 264                 return err;
 265
 266         /*
 267          * build mixers
 268          */
 269         strcpy(chip->card->mixername, "PowerMac DACA");
 270
 271         for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
 272                 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
 273                         return err;
 274         }
 275
 276 #ifdef CONFIG_PM
 277         chip->resume = daca_resume;
 278 #endif
 279
 280         return 0;
 281 }