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