sound/i2c/tea6330t.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Routines for control of the TEA6330T circuit via i2c bus
   4  *  Sound fader control circuit for car radios by Philips Semiconductors
   5  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/slab.h>
  10 #include <linux/module.h>
  11 #include <sound/core.h>
  12 #include <sound/control.h>
  13 #include <sound/tea6330t.h>
  14
  15 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  16 MODULE_DESCRIPTION("Routines for control of the TEA6330T circuit via i2c bus");
  17 MODULE_LICENSE("GPL");
  18
  19 #define TEA6330T_ADDR                   (0x80>>1) /* fixed address */
  20
  21 #define TEA6330T_SADDR_VOLUME_LEFT      0x00    /* volume left */
  22 #define TEA6330T_SADDR_VOLUME_RIGHT     0x01    /* volume right */
  23 #define TEA6330T_SADDR_BASS             0x02    /* bass control */
  24 #define TEA6330T_SADDR_TREBLE           0x03    /* treble control */
  25 #define TEA6330T_SADDR_FADER            0x04    /* fader control */
  26 #define   TEA6330T_MFN                  0x20    /* mute control for selected channels */
  27 #define   TEA6330T_FCH                  0x10    /* select fader channels - front or rear */
  28 #define TEA6330T_SADDR_AUDIO_SWITCH     0x05    /* audio switch */
  29 #define   TEA6330T_GMU                  0x80    /* mute control, general mute */
  30 #define   TEA6330T_EQN                  0x40    /* equalizer switchover (0=equalizer-on) */
  31
  32
  33 struct tea6330t {
  34         struct snd_i2c_device *device;
  35         struct snd_i2c_bus *bus;
  36         int equalizer;
  37         int fader;
  38         unsigned char regs[8];
  39         unsigned char mleft, mright;
  40         unsigned char bass, treble;
  41         unsigned char max_bass, max_treble;
  42 };
  43
  44
  45 int snd_tea6330t_detect(struct snd_i2c_bus *bus, int equalizer)
  46 {
  47         int res;
  48
  49         snd_i2c_lock(bus);
  50         res = snd_i2c_probeaddr(bus, TEA6330T_ADDR);
  51         snd_i2c_unlock(bus);
  52         return res;
  53 }
  54
  55 #if 0
  56 static void snd_tea6330t_set(struct tea6330t *tea,
  57                              unsigned char addr, unsigned char value)
  58 {
  59         snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1);
  60 }
  61 #endif
  62
  63 #define TEA6330T_MASTER_VOLUME(xname, xindex) \
  64 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  65   .info = snd_tea6330t_info_master_volume, \
  66   .get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume }
  67
  68 static int snd_tea6330t_info_master_volume(struct snd_kcontrol *kcontrol,
  69                                            struct snd_ctl_elem_info *uinfo)
  70 {
  71         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  72         uinfo->count = 2;
  73         uinfo->value.integer.min = 0;
  74         uinfo->value.integer.max = 43;
  75         return 0;
  76 }
  77
  78 static int snd_tea6330t_get_master_volume(struct snd_kcontrol *kcontrol,
  79                                           struct snd_ctl_elem_value *ucontrol)
  80 {
  81         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
  82
  83         snd_i2c_lock(tea->bus);
  84         ucontrol->value.integer.value[0] = tea->mleft - 0x14;
  85         ucontrol->value.integer.value[1] = tea->mright - 0x14;
  86         snd_i2c_unlock(tea->bus);
  87         return 0;
  88 }
  89
  90 static int snd_tea6330t_put_master_volume(struct snd_kcontrol *kcontrol,
  91                                           struct snd_ctl_elem_value *ucontrol)
  92 {
  93         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
  94         int change, count, err;
  95         unsigned char bytes[3];
  96         unsigned char val1, val2;
  97
  98         val1 = (ucontrol->value.integer.value[0] % 44) + 0x14;
  99         val2 = (ucontrol->value.integer.value[1] % 44) + 0x14;
 100         snd_i2c_lock(tea->bus);
 101         change = val1 != tea->mleft || val2 != tea->mright;
 102         tea->mleft = val1;
 103         tea->mright = val2;
 104         count = 0;
 105         if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) {
 106                 bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT;
 107                 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft;
 108         }
 109         if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) {
 110                 if (count == 0)
 111                         bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT;
 112                 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright;
 113         }
 114         if (count > 0) {
 115                 err = snd_i2c_sendbytes(tea->device, bytes, count);
 116                 if (err < 0)
 117                         change = err;
 118         }
 119         snd_i2c_unlock(tea->bus);
 120         return change;
 121 }
 122
 123 #define TEA6330T_MASTER_SWITCH(xname, xindex) \
 124 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 125   .info = snd_tea6330t_info_master_switch, \
 126   .get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch }
 127
 128 #define snd_tea6330t_info_master_switch         snd_ctl_boolean_stereo_info
 129
 130 static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol,
 131                                           struct snd_ctl_elem_value *ucontrol)
 132 {
 133         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 134
 135         snd_i2c_lock(tea->bus);
 136         ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
 137         ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
 138         snd_i2c_unlock(tea->bus);
 139         return 0;
 140 }
 141
 142 static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol,
 143                                           struct snd_ctl_elem_value *ucontrol)
 144 {
 145         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 146         int change, err;
 147         unsigned char bytes[3];
 148         unsigned char oval1, oval2, val1, val2;
 149
 150         val1 = ucontrol->value.integer.value[0] & 1;
 151         val2 = ucontrol->value.integer.value[1] & 1;
 152         snd_i2c_lock(tea->bus);
 153         oval1 = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
 154         oval2 = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
 155         change = val1 != oval1 || val2 != oval2;
 156         tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = val1 ? tea->mleft : 0;
 157         tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = val2 ? tea->mright : 0;
 158         bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
 159         bytes[1] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT];
 160         bytes[2] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT];
 161         err = snd_i2c_sendbytes(tea->device, bytes, 3);
 162         if (err < 0)
 163                 change = err;
 164         snd_i2c_unlock(tea->bus);
 165         return change;
 166 }
 167
 168 #define TEA6330T_BASS(xname, xindex) \
 169 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 170   .info = snd_tea6330t_info_bass, \
 171   .get = snd_tea6330t_get_bass, .put = snd_tea6330t_put_bass }
 172
 173 static int snd_tea6330t_info_bass(struct snd_kcontrol *kcontrol,
 174                                   struct snd_ctl_elem_info *uinfo)
 175 {
 176         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 177
 178         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 179         uinfo->count = 1;
 180         uinfo->value.integer.min = 0;
 181         uinfo->value.integer.max = tea->max_bass;
 182         return 0;
 183 }
 184
 185 static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol,
 186                                  struct snd_ctl_elem_value *ucontrol)
 187 {
 188         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 189
 190         ucontrol->value.integer.value[0] = tea->bass;
 191         return 0;
 192 }
 193
 194 static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol,
 195                                  struct snd_ctl_elem_value *ucontrol)
 196 {
 197         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 198         int change, err;
 199         unsigned char bytes[2];
 200         unsigned char val1;
 201
 202         val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1);
 203         snd_i2c_lock(tea->bus);
 204         tea->bass = val1;
 205         val1 += tea->equalizer ? 7 : 3;
 206         change = tea->regs[TEA6330T_SADDR_BASS] != val1;
 207         bytes[0] = TEA6330T_SADDR_BASS;
 208         bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1;
 209         err = snd_i2c_sendbytes(tea->device, bytes, 2);
 210         if (err < 0)
 211                 change = err;
 212         snd_i2c_unlock(tea->bus);
 213         return change;
 214 }
 215
 216 #define TEA6330T_TREBLE(xname, xindex) \
 217 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 218   .info = snd_tea6330t_info_treble, \
 219   .get = snd_tea6330t_get_treble, .put = snd_tea6330t_put_treble }
 220
 221 static int snd_tea6330t_info_treble(struct snd_kcontrol *kcontrol,
 222                                     struct snd_ctl_elem_info *uinfo)
 223 {
 224         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 225
 226         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 227         uinfo->count = 1;
 228         uinfo->value.integer.min = 0;
 229         uinfo->value.integer.max = tea->max_treble;
 230         return 0;
 231 }
 232
 233 static int snd_tea6330t_get_treble(struct snd_kcontrol *kcontrol,
 234                                    struct snd_ctl_elem_value *ucontrol)
 235 {
 236         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 237
 238         ucontrol->value.integer.value[0] = tea->treble;
 239         return 0;
 240 }
 241
 242 static int snd_tea6330t_put_treble(struct snd_kcontrol *kcontrol,
 243                                    struct snd_ctl_elem_value *ucontrol)
 244 {
 245         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 246         int change, err;
 247         unsigned char bytes[2];
 248         unsigned char val1;
 249
 250         val1 = ucontrol->value.integer.value[0] % (tea->max_treble + 1);
 251         snd_i2c_lock(tea->bus);
 252         tea->treble = val1;
 253         val1 += 3;
 254         change = tea->regs[TEA6330T_SADDR_TREBLE] != val1;
 255         bytes[0] = TEA6330T_SADDR_TREBLE;
 256         bytes[1] = tea->regs[TEA6330T_SADDR_TREBLE] = val1;
 257         err = snd_i2c_sendbytes(tea->device, bytes, 2);
 258         if (err < 0)
 259                 change = err;
 260         snd_i2c_unlock(tea->bus);
 261         return change;
 262 }
 263
 264 static const struct snd_kcontrol_new snd_tea6330t_controls[] = {
 265 TEA6330T_MASTER_SWITCH("Master Playback Switch", 0),
 266 TEA6330T_MASTER_VOLUME("Master Playback Volume", 0),
 267 TEA6330T_BASS("Tone Control - Bass", 0),
 268 TEA6330T_TREBLE("Tone Control - Treble", 0)
 269 };
 270
 271 static void snd_tea6330_free(struct snd_i2c_device *device)
 272 {
 273         kfree(device->private_data);
 274 }
 275
 276 int snd_tea6330t_update_mixer(struct snd_card *card,
 277                               struct snd_i2c_bus *bus,
 278                               int equalizer, int fader)
 279 {
 280         struct snd_i2c_device *device;
 281         struct tea6330t *tea;
 282         const struct snd_kcontrol_new *knew;
 283         unsigned int idx;
 284         int err;
 285         u8 default_treble, default_bass;
 286         unsigned char bytes[7];
 287
 288         tea = kzalloc(sizeof(*tea), GFP_KERNEL);
 289         if (tea == NULL)
 290                 return -ENOMEM;
 291         err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device);
 292         if (err < 0) {
 293                 kfree(tea);
 294                 return err;
 295         }
 296         tea->device = device;
 297         tea->bus = bus;
 298         tea->equalizer = equalizer;
 299         tea->fader = fader;
 300         device->private_data = tea;
 301         device->private_free = snd_tea6330_free;
 302
 303         snd_i2c_lock(bus);
 304
 305         /* turn fader off and handle equalizer */
 306         tea->regs[TEA6330T_SADDR_FADER] = 0x3f;
 307         tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN;
 308         /* initialize mixer */
 309         if (!tea->equalizer) {
 310                 tea->max_bass = 9;
 311                 tea->max_treble = 8;
 312                 default_bass = 3 + 4;
 313                 tea->bass = 4;
 314                 default_treble = 3 + 4;
 315                 tea->treble = 4;
 316         } else {
 317                 tea->max_bass = 5;
 318                 tea->max_treble = 0;
 319                 default_bass = 7 + 4;
 320                 tea->bass = 4;
 321                 default_treble = 3;
 322                 tea->treble = 0;
 323         }
 324         tea->mleft = tea->mright = 0x14;
 325         tea->regs[TEA6330T_SADDR_BASS] = default_bass;
 326         tea->regs[TEA6330T_SADDR_TREBLE] = default_treble;
 327
 328         /* compose I2C message and put the hardware to initial state */
 329         bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
 330         for (idx = 0; idx < 6; idx++)
 331                 bytes[idx+1] = tea->regs[idx];
 332         err = snd_i2c_sendbytes(device, bytes, 7);
 333         if (err < 0)
 334                 goto __error;
 335
 336         strcat(card->mixername, ",TEA6330T");
 337         err = snd_component_add(card, "TEA6330T");
 338         if (err < 0)
 339                 goto __error;
 340
 341         for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) {
 342                 knew = &snd_tea6330t_controls[idx];
 343                 if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble"))
 344                         continue;
 345                 err = snd_ctl_add(card, snd_ctl_new1(knew, tea));
 346                 if (err < 0)
 347                         goto __error;
 348         }
 349
 350         snd_i2c_unlock(bus);
 351         return 0;
 352
 353       __error:
 354         snd_i2c_unlock(bus);
 355         snd_i2c_device_free(device);
 356         return err;
 357 }
 358
 359 EXPORT_SYMBOL(snd_tea6330t_detect);
 360 EXPORT_SYMBOL(snd_tea6330t_update_mixer);