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 typedef struct pmac_daca_t {
  44         pmac_keywest_t i2c;
  45         int left_vol, right_vol;
  46         unsigned int deemphasis : 1;
  47         unsigned int amp_on : 1;
  48 } pmac_daca_t;
  49
  50
  51 /*
  52  * initialize / detect DACA
  53  */
  54 static int daca_init_client(pmac_keywest_t *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(pmac_daca_t *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(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *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(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 105 {
 106         pmac_t *chip = snd_kcontrol_chip(kcontrol);
 107         pmac_daca_t *mix;
 108         if (! (mix = chip->mixer_data))
 109                 return -ENODEV;
 110         ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
 111         return 0;
 112 }
 113
 114 static int daca_put_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 115 {
 116         pmac_t *chip = snd_kcontrol_chip(kcontrol);
 117         pmac_daca_t *mix;
 118         int change;
 119
 120         if (! (mix = chip->mixer_data))
 121                 return -ENODEV;
 122         change = mix->deemphasis != ucontrol->value.integer.value[0];
 123         if (change) {
 124                 mix->deemphasis = ucontrol->value.integer.value[0];
 125                 daca_set_volume(mix);
 126         }
 127         return change;
 128 }
 129
 130 /* output volume */
 131 static int daca_info_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
 132 {
 133         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 134         uinfo->count = 2;
 135         uinfo->value.integer.min = 0;
 136         uinfo->value.integer.max = DACA_VOL_MAX;
 137         return 0;
 138 }
 139
 140 static int daca_get_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 141 {
 142         pmac_t *chip = snd_kcontrol_chip(kcontrol);
 143         pmac_daca_t *mix;
 144         if (! (mix = chip->mixer_data))
 145                 return -ENODEV;
 146         ucontrol->value.integer.value[0] = mix->left_vol;
 147         ucontrol->value.integer.value[1] = mix->right_vol;
 148         return 0;
 149 }
 150
 151 static int daca_put_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 152 {
 153         pmac_t *chip = snd_kcontrol_chip(kcontrol);
 154         pmac_daca_t *mix;
 155         int change;
 156
 157         if (! (mix = chip->mixer_data))
 158                 return -ENODEV;
 159         change = mix->left_vol != ucontrol->value.integer.value[0] ||
 160                 mix->right_vol != ucontrol->value.integer.value[1];
 161         if (change) {
 162                 mix->left_vol = ucontrol->value.integer.value[0];
 163                 mix->right_vol = ucontrol->value.integer.value[1];
 164                 daca_set_volume(mix);
 165         }
 166         return change;
 167 }
 168
 169 /* amplifier switch */
 170 #define daca_info_amp   daca_info_deemphasis
 171
 172 static int daca_get_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 173 {
 174         pmac_t *chip = snd_kcontrol_chip(kcontrol);
 175         pmac_daca_t *mix;
 176         if (! (mix = chip->mixer_data))
 177                 return -ENODEV;
 178         ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
 179         return 0;
 180 }
 181
 182 static int daca_put_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 183 {
 184         pmac_t *chip = snd_kcontrol_chip(kcontrol);
 185         pmac_daca_t *mix;
 186         int change;
 187
 188         if (! (mix = chip->mixer_data))
 189                 return -ENODEV;
 190         change = mix->amp_on != ucontrol->value.integer.value[0];
 191         if (change) {
 192                 mix->amp_on = ucontrol->value.integer.value[0];
 193                 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 194                                           mix->amp_on ? 0x05 : 0x04);
 195         }
 196         return change;
 197 }
 198
 199 static snd_kcontrol_new_t daca_mixers[] = {
 200         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 201           .name = "Deemphasis Switch",
 202           .info = daca_info_deemphasis,
 203           .get = daca_get_deemphasis,
 204           .put = daca_put_deemphasis
 205         },
 206         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 207           .name = "Master Playback Volume",
 208           .info = daca_info_volume,
 209           .get = daca_get_volume,
 210           .put = daca_put_volume
 211         },
 212         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 213           .name = "Power Amplifier Switch",
 214           .info = daca_info_amp,
 215           .get = daca_get_amp,
 216           .put = daca_put_amp
 217         },
 218 };
 219
 220
 221 #ifdef CONFIG_PMAC_PBOOK
 222 static void daca_resume(pmac_t *chip)
 223 {
 224         pmac_daca_t *mix = chip->mixer_data;
 225         i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
 226         i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 227                                   mix->amp_on ? 0x05 : 0x04);
 228         daca_set_volume(mix);
 229 }
 230 #endif /* CONFIG_PMAC_PBOOK */
 231
 232
 233 static void daca_cleanup(pmac_t *chip)
 234 {
 235         pmac_daca_t *mix = chip->mixer_data;
 236         if (! mix)
 237                 return;
 238         snd_pmac_keywest_cleanup(&mix->i2c);
 239         kfree(mix);
 240         chip->mixer_data = NULL;
 241 }
 242
 243 /* exported */
 244 int __init snd_pmac_daca_init(pmac_t *chip)
 245 {
 246         int i, err;
 247         pmac_daca_t *mix;
 248
 249 #ifdef CONFIG_KMOD
 250         if (current->fs->root)
 251                 request_module("i2c-keywest");
 252 #endif /* CONFIG_KMOD */
 253
 254         mix = kmalloc(sizeof(*mix), GFP_KERNEL);
 255         if (! mix)
 256                 return -ENOMEM;
 257         memset(mix, 0, sizeof(*mix));
 258         chip->mixer_data = mix;
 259         chip->mixer_free = daca_cleanup;
 260         mix->amp_on = 1; /* default on */
 261
 262         mix->i2c.addr = DACA_I2C_ADDR;
 263         mix->i2c.init_client = daca_init_client;
 264         mix->i2c.name = "DACA";
 265         if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
 266                 return err;
 267
 268         /*
 269          * build mixers
 270          */
 271         strcpy(chip->card->mixername, "PowerMac DACA");
 272
 273         for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
 274                 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
 275                         return err;
 276         }
 277
 278 #ifdef CONFIG_PMAC_PBOOK
 279         chip->resume = daca_resume;
 280 #endif
 281
 282         return 0;
 283 }