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