sound/i2c/tea6330t.c

   1 /*
   2  *  Routines for control of the TEA6330T circuit via i2c bus
   3  *  Sound fader control circuit for car radios by Philips Semiconductors
   4  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   5  *
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22
  23 #include <sound/driver.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <sound/core.h>
  27 #include <sound/control.h>
  28 #include <sound/tea6330t.h>
  29
  30 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  31 MODULE_DESCRIPTION("Routines for control of the TEA6330T circuit via i2c bus");
  32 MODULE_LICENSE("GPL");
  33
  34 #define TEA6330T_ADDR                   (0x80>>1) /* fixed address */
  35
  36 #define TEA6330T_SADDR_VOLUME_LEFT      0x00    /* volume left */
  37 #define TEA6330T_SADDR_VOLUME_RIGHT     0x01    /* volume right */
  38 #define TEA6330T_SADDR_BASS             0x02    /* bass control */
  39 #define TEA6330T_SADDR_TREBLE           0x03    /* treble control */
  40 #define TEA6330T_SADDR_FADER            0x04    /* fader control */
  41 #define   TEA6330T_MFN                  0x20    /* mute control for selected channels */
  42 #define   TEA6330T_FCH                  0x10    /* select fader channels - front or rear */
  43 #define TEA6330T_SADDR_AUDIO_SWITCH     0x05    /* audio switch */
  44 #define   TEA6330T_GMU                  0x80    /* mute control, general mute */
  45 #define   TEA6330T_EQN                  0x40    /* equalizer switchover (0=equalizer-on) */
  46
  47
  48 struct tea6330t {
  49         struct snd_i2c_device *device;
  50         struct snd_i2c_bus *bus;
  51         int equalizer;
  52         int fader;
  53         unsigned char regs[8];
  54         unsigned char mleft, mright;
  55         unsigned char bass, treble;
  56         unsigned char max_bass, max_treble;
  57 };
  58
  59
  60 int snd_tea6330t_detect(struct snd_i2c_bus *bus, int equalizer)
  61 {
  62         int res;
  63
  64         snd_i2c_lock(bus);
  65         res = snd_i2c_probeaddr(bus, TEA6330T_ADDR);
  66         snd_i2c_unlock(bus);
  67         return res;
  68 }
  69
  70 #if 0
  71 static void snd_tea6330t_set(struct tea6330t *tea,
  72                              unsigned char addr, unsigned char value)
  73 {
  74 #if 0
  75         printk(KERN_DEBUG "set - 0x%x/0x%x\n", addr, value);
  76 #endif
  77         snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1);
  78 }
  79 #endif
  80
  81 #define TEA6330T_MASTER_VOLUME(xname, xindex) \
  82 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  83   .info = snd_tea6330t_info_master_volume, \
  84   .get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume }
  85
  86 static int snd_tea6330t_info_master_volume(struct snd_kcontrol *kcontrol,
  87                                            struct snd_ctl_elem_info *uinfo)
  88 {
  89         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  90         uinfo->count = 2;
  91         uinfo->value.integer.min = 0;
  92         uinfo->value.integer.max = 43;
  93         return 0;
  94 }
  95
  96 static int snd_tea6330t_get_master_volume(struct snd_kcontrol *kcontrol,
  97                                           struct snd_ctl_elem_value *ucontrol)
  98 {
  99         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 100
 101         snd_i2c_lock(tea->bus);
 102         ucontrol->value.integer.value[0] = tea->mleft - 0x14;
 103         ucontrol->value.integer.value[1] = tea->mright - 0x14;
 104         snd_i2c_unlock(tea->bus);
 105         return 0;
 106 }
 107
 108 static int snd_tea6330t_put_master_volume(struct snd_kcontrol *kcontrol,
 109                                           struct snd_ctl_elem_value *ucontrol)
 110 {
 111         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 112         int change, count, err;
 113         unsigned char bytes[3];
 114         unsigned char val1, val2;
 115
 116         val1 = (ucontrol->value.integer.value[0] % 44) + 0x14;
 117         val2 = (ucontrol->value.integer.value[1] % 44) + 0x14;
 118         snd_i2c_lock(tea->bus);
 119         change = val1 != tea->mleft || val2 != tea->mright;
 120         tea->mleft = val1;
 121         tea->mright = val2;
 122         count = 0;
 123         if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) {
 124                 bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT;
 125                 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft;
 126         }
 127         if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) {
 128                 if (count == 0)
 129                         bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT;
 130                 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright;
 131         }
 132         if (count > 0) {
 133                 if ((err = snd_i2c_sendbytes(tea->device, bytes, count)) < 0)
 134                         change = err;
 135         }
 136         snd_i2c_unlock(tea->bus);
 137         return change;
 138 }
 139
 140 #define TEA6330T_MASTER_SWITCH(xname, xindex) \
 141 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 142   .info = snd_tea6330t_info_master_switch, \
 143   .get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch }
 144
 145 #define snd_tea6330t_info_master_switch         snd_ctl_boolean_stereo_info
 146
 147 static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol,
 148                                           struct snd_ctl_elem_value *ucontrol)
 149 {
 150         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 151
 152         snd_i2c_lock(tea->bus);
 153         ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
 154         ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
 155         snd_i2c_unlock(tea->bus);
 156         return 0;
 157 }
 158
 159 static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol,
 160                                           struct snd_ctl_elem_value *ucontrol)
 161 {
 162         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 163         int change, err;
 164         unsigned char bytes[3];
 165         unsigned char oval1, oval2, val1, val2;
 166
 167         val1 = ucontrol->value.integer.value[0] & 1;
 168         val2 = ucontrol->value.integer.value[1] & 1;
 169         snd_i2c_lock(tea->bus);
 170         oval1 = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
 171         oval2 = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
 172         change = val1 != oval1 || val2 != oval2;
 173         tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = val1 ? tea->mleft : 0;
 174         tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = val2 ? tea->mright : 0;
 175         bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
 176         bytes[1] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT];
 177         bytes[2] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT];
 178         if ((err = snd_i2c_sendbytes(tea->device, bytes, 3)) < 0)
 179                 change = err;
 180         snd_i2c_unlock(tea->bus);
 181         return change;
 182 }
 183
 184 #define TEA6330T_BASS(xname, xindex) \
 185 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 186   .info = snd_tea6330t_info_bass, \
 187   .get = snd_tea6330t_get_bass, .put = snd_tea6330t_put_bass }
 188
 189 static int snd_tea6330t_info_bass(struct snd_kcontrol *kcontrol,
 190                                   struct snd_ctl_elem_info *uinfo)
 191 {
 192         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 193
 194         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 195         uinfo->count = 1;
 196         uinfo->value.integer.min = 0;
 197         uinfo->value.integer.max = tea->max_bass;
 198         return 0;
 199 }
 200
 201 static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol,
 202                                  struct snd_ctl_elem_value *ucontrol)
 203 {
 204         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 205
 206         ucontrol->value.integer.value[0] = tea->bass;
 207         return 0;
 208 }
 209
 210 static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol,
 211                                  struct snd_ctl_elem_value *ucontrol)
 212 {
 213         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 214         int change, err;
 215         unsigned char bytes[2];
 216         unsigned char val1;
 217
 218         val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1);
 219         snd_i2c_lock(tea->bus);
 220         tea->bass = val1;
 221         val1 += tea->equalizer ? 7 : 3;
 222         change = tea->regs[TEA6330T_SADDR_BASS] != val1;
 223         bytes[0] = TEA6330T_SADDR_BASS;
 224         bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1;
 225         if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
 226                 change = err;
 227         snd_i2c_unlock(tea->bus);
 228         return change;
 229 }
 230
 231 #define TEA6330T_TREBLE(xname, xindex) \
 232 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 233   .info = snd_tea6330t_info_treble, \
 234   .get = snd_tea6330t_get_treble, .put = snd_tea6330t_put_treble }
 235
 236 static int snd_tea6330t_info_treble(struct snd_kcontrol *kcontrol,
 237                                     struct snd_ctl_elem_info *uinfo)
 238 {
 239         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 240
 241         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 242         uinfo->count = 1;
 243         uinfo->value.integer.min = 0;
 244         uinfo->value.integer.max = tea->max_treble;
 245         return 0;
 246 }
 247
 248 static int snd_tea6330t_get_treble(struct snd_kcontrol *kcontrol,
 249                                    struct snd_ctl_elem_value *ucontrol)
 250 {
 251         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 252
 253         ucontrol->value.integer.value[0] = tea->treble;
 254         return 0;
 255 }
 256
 257 static int snd_tea6330t_put_treble(struct snd_kcontrol *kcontrol,
 258                                    struct snd_ctl_elem_value *ucontrol)
 259 {
 260         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 261         int change, err;
 262         unsigned char bytes[2];
 263         unsigned char val1;
 264
 265         val1 = ucontrol->value.integer.value[0] % (tea->max_treble + 1);
 266         snd_i2c_lock(tea->bus);
 267         tea->treble = val1;
 268         val1 += 3;
 269         change = tea->regs[TEA6330T_SADDR_TREBLE] != val1;
 270         bytes[0] = TEA6330T_SADDR_TREBLE;
 271         bytes[1] = tea->regs[TEA6330T_SADDR_TREBLE] = val1;
 272         if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
 273                 change = err;
 274         snd_i2c_unlock(tea->bus);
 275         return change;
 276 }
 277
 278 static struct snd_kcontrol_new snd_tea6330t_controls[] = {
 279 TEA6330T_MASTER_SWITCH("Master Playback Switch", 0),
 280 TEA6330T_MASTER_VOLUME("Master Playback Volume", 0),
 281 TEA6330T_BASS("Tone Control - Bass", 0),
 282 TEA6330T_TREBLE("Tone Control - Treble", 0)
 283 };
 284
 285 static void snd_tea6330_free(struct snd_i2c_device *device)
 286 {
 287         kfree(device->private_data);
 288 }
 289
 290 int snd_tea6330t_update_mixer(struct snd_card *card,
 291                               struct snd_i2c_bus *bus,
 292                               int equalizer, int fader)
 293 {
 294         struct snd_i2c_device *device;
 295         struct tea6330t *tea;
 296         struct snd_kcontrol_new *knew;
 297         unsigned int idx;
 298         int err = -ENOMEM;
 299         u8 default_treble, default_bass;
 300         unsigned char bytes[7];
 301
 302         tea = kzalloc(sizeof(*tea), GFP_KERNEL);
 303         if (tea == NULL)
 304                 return -ENOMEM;
 305         if ((err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device)) < 0) {
 306                 kfree(tea);
 307                 return err;
 308         }
 309         tea->device = device;
 310         tea->bus = bus;
 311         tea->equalizer = equalizer;
 312         tea->fader = fader;
 313         device->private_data = tea;
 314         device->private_free = snd_tea6330_free;
 315
 316         snd_i2c_lock(bus);
 317
 318         /* turn fader off and handle equalizer */
 319         tea->regs[TEA6330T_SADDR_FADER] = 0x3f;
 320         tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN;
 321         /* initialize mixer */
 322         if (!tea->equalizer) {
 323                 tea->max_bass = 9;
 324                 tea->max_treble = 8;
 325                 default_bass = 3 + 4;
 326                 tea->bass = 4;
 327                 default_treble = 3 + 4;
 328                 tea->treble = 4;
 329         } else {
 330                 tea->max_bass = 5;
 331                 tea->max_treble = 0;
 332                 default_bass = 7 + 4;
 333                 tea->bass = 4;
 334                 default_treble = 3;
 335                 tea->treble = 0;
 336         }
 337         tea->mleft = tea->mright = 0x14;
 338         tea->regs[TEA6330T_SADDR_BASS] = default_bass;
 339         tea->regs[TEA6330T_SADDR_TREBLE] = default_treble;
 340
 341         /* compose I2C message and put the hardware to initial state */
 342         bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
 343         for (idx = 0; idx < 6; idx++)
 344                 bytes[idx+1] = tea->regs[idx];
 345         if ((err = snd_i2c_sendbytes(device, bytes, 7)) < 0)
 346                 goto __error;
 347
 348         strcat(card->mixername, ",TEA6330T");
 349         if ((err = snd_component_add(card, "TEA6330T")) < 0)
 350                 goto __error;
 351
 352         for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) {
 353                 knew = &snd_tea6330t_controls[idx];
 354                 if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble"))
 355                         continue;
 356                 if ((err = snd_ctl_add(card, snd_ctl_new1(knew, tea))) < 0)
 357                         goto __error;
 358         }
 359
 360         snd_i2c_unlock(bus);
 361         return 0;
 362
 363       __error:
 364         snd_i2c_unlock(bus);
 365         snd_i2c_device_free(device);
 366         return err;
 367 }
 368
 369 EXPORT_SYMBOL(snd_tea6330t_detect);
 370 EXPORT_SYMBOL(snd_tea6330t_update_mixer);
 371
 372 /*
 373  *  INIT part
 374  */
 375
 376 static int __init alsa_tea6330t_init(void)
 377 {
 378         return 0;
 379 }
 380
 381 static void __exit alsa_tea6330t_exit(void)
 382 {
 383 }
 384
 385 module_init(alsa_tea6330t_init)
 386 module_exit(alsa_tea6330t_exit)