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/i2c-dev.h>
  26 #include <linux/kmod.h>
  27 #include <linux/slab.h>
  28 #include <sound/core.h>
  29 #include "pmac.h"
  30
  31 /* i2c address */
  32 #define DACA_I2C_ADDR   0x4d
  33
  34 /* registers */
  35 #define DACA_REG_SR     0x01
  36 #define DACA_REG_AVOL   0x02
  37 #define DACA_REG_GCFG   0x03
  38
  39 /* maximum volume value */
  40 #define DACA_VOL_MAX    0x38
  41
  42
  43 struct pmac_daca {
  44         struct pmac_keywest i2c;
  45         int left_vol, right_vol;
  46         unsigned int deemphasis : 1;
  47         unsigned int amp_on : 1;
  48 };
  49
  50
  51 /*
  52  * initialize / detect DACA
  53  */
  54 static int daca_init_client(struct pmac_keywest *i2c)
  55 {
  56         unsigned short wdata = 0x00;
  57         /* SR: no swap, 1bit delay, 32-48kHz */
  58         /* GCFG: power amp inverted, DAC on */
  59         if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
  60             i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
  61                 return -EINVAL;
  62         return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
  63                                           2, (unsigned char*)&wdata);
  64 }
  65
  66 /*
  67  * update volume
  68  */
  69 static int daca_set_volume(struct pmac_daca *mix)
  70 {
  71         unsigned char data[2];
  72
  73         if (! mix->i2c.client)
  74                 return -ENODEV;
  75
  76         if (mix->left_vol > DACA_VOL_MAX)
  77                 data[0] = DACA_VOL_MAX;
  78         else
  79                 data[0] = mix->left_vol;
  80         if (mix->right_vol > DACA_VOL_MAX)
  81                 data[1] = DACA_VOL_MAX;
  82         else
  83                 data[1] = mix->right_vol;
  84         data[1] |= mix->deemphasis ? 0x40 : 0;
  85         if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
  86                                        2, data) < 0) {
  87                 snd_printk("failed to set volume \n");
  88                 return -EINVAL;
  89         }
  90         return 0;
  91 }
  92
  93
  94 /* deemphasis switch */
  95 static int daca_info_deemphasis(struct snd_kcontrol *kcontrol,
  96                                 struct snd_ctl_elem_info *uinfo)
  97 {
  98         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
  99         uinfo->count = 1;
 100         uinfo->value.integer.min = 0;
 101         uinfo->value.integer.max = 1;
 102         return 0;
 103 }
 104
 105 static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
 106                                struct snd_ctl_elem_value *ucontrol)
 107 {
 108         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 109         struct pmac_daca *mix;
 110         if (! (mix = chip->mixer_data))
 111                 return -ENODEV;
 112         ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
 113         return 0;
 114 }
 115
 116 static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
 117                                struct snd_ctl_elem_value *ucontrol)
 118 {
 119         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 120         struct pmac_daca *mix;
 121         int change;
 122
 123         if (! (mix = chip->mixer_data))
 124                 return -ENODEV;
 125         change = mix->deemphasis != ucontrol->value.integer.value[0];
 126         if (change) {
 127                 mix->deemphasis = ucontrol->value.integer.value[0];
 128                 daca_set_volume(mix);
 129         }
 130         return change;
 131 }
 132
 133 /* output volume */
 134 static int daca_info_volume(struct snd_kcontrol *kcontrol,
 135                             struct snd_ctl_elem_info *uinfo)
 136 {
 137         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 138         uinfo->count = 2;
 139         uinfo->value.integer.min = 0;
 140         uinfo->value.integer.max = DACA_VOL_MAX;
 141         return 0;
 142 }
 143
 144 static int daca_get_volume(struct snd_kcontrol *kcontrol,
 145                            struct snd_ctl_elem_value *ucontrol)
 146 {
 147         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 148         struct pmac_daca *mix;
 149         if (! (mix = chip->mixer_data))
 150                 return -ENODEV;
 151         ucontrol->value.integer.value[0] = mix->left_vol;
 152         ucontrol->value.integer.value[1] = mix->right_vol;
 153         return 0;
 154 }
 155
 156 static int daca_put_volume(struct snd_kcontrol *kcontrol,
 157                            struct snd_ctl_elem_value *ucontrol)
 158 {
 159         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 160         struct pmac_daca *mix;
 161         int change;
 162
 163         if (! (mix = chip->mixer_data))
 164                 return -ENODEV;
 165         change = mix->left_vol != ucontrol->value.integer.value[0] ||
 166                 mix->right_vol != ucontrol->value.integer.value[1];
 167         if (change) {
 168                 mix->left_vol = ucontrol->value.integer.value[0];
 169                 mix->right_vol = ucontrol->value.integer.value[1];
 170                 daca_set_volume(mix);
 171         }
 172         return change;
 173 }
 174
 175 /* amplifier switch */
 176 #define daca_info_amp   daca_info_deemphasis
 177
 178 static int daca_get_amp(struct snd_kcontrol *kcontrol,
 179                         struct snd_ctl_elem_value *ucontrol)
 180 {
 181         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 182         struct pmac_daca *mix;
 183         if (! (mix = chip->mixer_data))
 184                 return -ENODEV;
 185         ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
 186         return 0;
 187 }
 188
 189 static int daca_put_amp(struct snd_kcontrol *kcontrol,
 190                         struct snd_ctl_elem_value *ucontrol)
 191 {
 192         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 193         struct pmac_daca *mix;
 194         int change;
 195
 196         if (! (mix = chip->mixer_data))
 197                 return -ENODEV;
 198         change = mix->amp_on != ucontrol->value.integer.value[0];
 199         if (change) {
 200                 mix->amp_on = ucontrol->value.integer.value[0];
 201                 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 202                                           mix->amp_on ? 0x05 : 0x04);
 203         }
 204         return change;
 205 }
 206
 207 static struct snd_kcontrol_new daca_mixers[] = {
 208         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 209           .name = "Deemphasis Switch",
 210           .info = daca_info_deemphasis,
 211           .get = daca_get_deemphasis,
 212           .put = daca_put_deemphasis
 213         },
 214         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 215           .name = "Master Playback Volume",
 216           .info = daca_info_volume,
 217           .get = daca_get_volume,
 218           .put = daca_put_volume
 219         },
 220         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 221           .name = "Power Amplifier Switch",
 222           .info = daca_info_amp,
 223           .get = daca_get_amp,
 224           .put = daca_put_amp
 225         },
 226 };
 227
 228
 229 #ifdef CONFIG_PM
 230 static void daca_resume(struct snd_pmac *chip)
 231 {
 232         struct pmac_daca *mix = chip->mixer_data;
 233         i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
 234         i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 235                                   mix->amp_on ? 0x05 : 0x04);
 236         daca_set_volume(mix);
 237 }
 238 #endif /* CONFIG_PM */
 239
 240
 241 static void daca_cleanup(struct snd_pmac *chip)
 242 {
 243         struct pmac_daca *mix = chip->mixer_data;
 244         if (! mix)
 245                 return;
 246         snd_pmac_keywest_cleanup(&mix->i2c);
 247         kfree(mix);
 248         chip->mixer_data = NULL;
 249 }
 250
 251 /* exported */
 252 int __init snd_pmac_daca_init(struct snd_pmac *chip)
 253 {
 254         int i, err;
 255         struct pmac_daca *mix;
 256
 257 #ifdef CONFIG_KMOD
 258         if (current->fs->root)
 259                 request_module("i2c-keywest");
 260 #endif /* CONFIG_KMOD */
 261
 262         mix = kmalloc(sizeof(*mix), GFP_KERNEL);
 263         if (! mix)
 264                 return -ENOMEM;
 265         memset(mix, 0, sizeof(*mix));
 266         chip->mixer_data = mix;
 267         chip->mixer_free = daca_cleanup;
 268         mix->amp_on = 1; /* default on */
 269
 270         mix->i2c.addr = DACA_I2C_ADDR;
 271         mix->i2c.init_client = daca_init_client;
 272         mix->i2c.name = "DACA";
 273         if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
 274                 return err;
 275
 276         /*
 277          * build mixers
 278          */
 279         strcpy(chip->card->mixername, "PowerMac DACA");
 280
 281         for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
 282                 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
 283                         return err;
 284         }
 285
 286 #ifdef CONFIG_PM
 287         chip->resume = daca_resume;
 288 #endif
 289
 290         return 0;
 291 }