release/src-rt-6.x/linux/linux-2.6/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 static int daca_info_deemphasis(struct snd_kcontrol *kcontrol,
  95                                 struct snd_ctl_elem_info *uinfo)
  96 {
  97         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
  98         uinfo->count = 1;
  99         uinfo->value.integer.min = 0;
 100         uinfo->value.integer.max = 1;
 101         return 0;
 102 }
 103
 104 static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
 105                                struct snd_ctl_elem_value *ucontrol)
 106 {
 107         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 108         struct pmac_daca *mix;
 109         if (! (mix = chip->mixer_data))
 110                 return -ENODEV;
 111         ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
 112         return 0;
 113 }
 114
 115 static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
 116                                struct snd_ctl_elem_value *ucontrol)
 117 {
 118         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 119         struct pmac_daca *mix;
 120         int change;
 121
 122         if (! (mix = chip->mixer_data))
 123                 return -ENODEV;
 124         change = mix->deemphasis != ucontrol->value.integer.value[0];
 125         if (change) {
 126                 mix->deemphasis = ucontrol->value.integer.value[0];
 127                 daca_set_volume(mix);
 128         }
 129         return change;
 130 }
 131
 132 /* output volume */
 133 static int daca_info_volume(struct snd_kcontrol *kcontrol,
 134                             struct snd_ctl_elem_info *uinfo)
 135 {
 136         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 137         uinfo->count = 2;
 138         uinfo->value.integer.min = 0;
 139         uinfo->value.integer.max = DACA_VOL_MAX;
 140         return 0;
 141 }
 142
 143 static int daca_get_volume(struct snd_kcontrol *kcontrol,
 144                            struct snd_ctl_elem_value *ucontrol)
 145 {
 146         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 147         struct pmac_daca *mix;
 148         if (! (mix = chip->mixer_data))
 149                 return -ENODEV;
 150         ucontrol->value.integer.value[0] = mix->left_vol;
 151         ucontrol->value.integer.value[1] = mix->right_vol;
 152         return 0;
 153 }
 154
 155 static int daca_put_volume(struct snd_kcontrol *kcontrol,
 156                            struct snd_ctl_elem_value *ucontrol)
 157 {
 158         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 159         struct pmac_daca *mix;
 160         int change;
 161
 162         if (! (mix = chip->mixer_data))
 163                 return -ENODEV;
 164         change = mix->left_vol != ucontrol->value.integer.value[0] ||
 165                 mix->right_vol != ucontrol->value.integer.value[1];
 166         if (change) {
 167                 mix->left_vol = ucontrol->value.integer.value[0];
 168                 mix->right_vol = ucontrol->value.integer.value[1];
 169                 daca_set_volume(mix);
 170         }
 171         return change;
 172 }
 173
 174 /* amplifier switch */
 175 #define daca_info_amp   daca_info_deemphasis
 176
 177 static int daca_get_amp(struct snd_kcontrol *kcontrol,
 178                         struct snd_ctl_elem_value *ucontrol)
 179 {
 180         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 181         struct pmac_daca *mix;
 182         if (! (mix = chip->mixer_data))
 183                 return -ENODEV;
 184         ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
 185         return 0;
 186 }
 187
 188 static int daca_put_amp(struct snd_kcontrol *kcontrol,
 189                         struct snd_ctl_elem_value *ucontrol)
 190 {
 191         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 192         struct pmac_daca *mix;
 193         int change;
 194
 195         if (! (mix = chip->mixer_data))
 196                 return -ENODEV;
 197         change = mix->amp_on != ucontrol->value.integer.value[0];
 198         if (change) {
 199                 mix->amp_on = ucontrol->value.integer.value[0];
 200                 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 201                                           mix->amp_on ? 0x05 : 0x04);
 202         }
 203         return change;
 204 }
 205
 206 static struct snd_kcontrol_new daca_mixers[] = {
 207         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 208           .name = "Deemphasis Switch",
 209           .info = daca_info_deemphasis,
 210           .get = daca_get_deemphasis,
 211           .put = daca_put_deemphasis
 212         },
 213         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 214           .name = "Master Playback Volume",
 215           .info = daca_info_volume,
 216           .get = daca_get_volume,
 217           .put = daca_put_volume
 218         },
 219         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 220           .name = "Power Amplifier Switch",
 221           .info = daca_info_amp,
 222           .get = daca_get_amp,
 223           .put = daca_put_amp
 224         },
 225 };
 226
 227
 228 #ifdef CONFIG_PM
 229 static void daca_resume(struct snd_pmac *chip)
 230 {
 231         struct pmac_daca *mix = chip->mixer_data;
 232         i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
 233         i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 234                                   mix->amp_on ? 0x05 : 0x04);
 235         daca_set_volume(mix);
 236 }
 237 #endif /* CONFIG_PM */
 238
 239
 240 static void daca_cleanup(struct snd_pmac *chip)
 241 {
 242         struct pmac_daca *mix = chip->mixer_data;
 243         if (! mix)
 244                 return;
 245         snd_pmac_keywest_cleanup(&mix->i2c);
 246         kfree(mix);
 247         chip->mixer_data = NULL;
 248 }
 249
 250 /* exported */
 251 int __init snd_pmac_daca_init(struct snd_pmac *chip)
 252 {
 253         int i, err;
 254         struct pmac_daca *mix;
 255
 256 #ifdef CONFIG_KMOD
 257         if (current->fs->root)
 258                 request_module("i2c-powermac");
 259 #endif /* CONFIG_KMOD */
 260
 261         mix = kzalloc(sizeof(*mix), GFP_KERNEL);
 262         if (! mix)
 263                 return -ENOMEM;
 264         chip->mixer_data = mix;
 265         chip->mixer_free = daca_cleanup;
 266         mix->amp_on = 1; /* default on */
 267
 268         mix->i2c.addr = DACA_I2C_ADDR;
 269         mix->i2c.init_client = daca_init_client;
 270         mix->i2c.name = "DACA";
 271         if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
 272                 return err;
 273
 274         /*
 275          * build mixers
 276          */
 277         strcpy(chip->card->mixername, "PowerMac DACA");
 278
 279         for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
 280                 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
 281                         return err;
 282         }
 283
 284 #ifdef CONFIG_PM
 285         chip->resume = daca_resume;
 286 #endif
 287
 288         return 0;
 289 }