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 #if 0
  60         printk(KERN_DEBUG "set - 0x%x/0x%x\n", addr, value);
  61 #endif
  62         snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1);
  63 }
  64 #endif
  65
  66 #define TEA6330T_MASTER_VOLUME(xname, xindex) \
  67 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  68   .info = snd_tea6330t_info_master_volume, \
  69   .get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume }
  70
  71 static int snd_tea6330t_info_master_volume(struct snd_kcontrol *kcontrol,
  72                                            struct snd_ctl_elem_info *uinfo)
  73 {
  74         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  75         uinfo->count = 2;
  76         uinfo->value.integer.min = 0;
  77         uinfo->value.integer.max = 43;
  78         return 0;
  79 }
  80
  81 static int snd_tea6330t_get_master_volume(struct snd_kcontrol *kcontrol,
  82                                           struct snd_ctl_elem_value *ucontrol)
  83 {
  84         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
  85
  86         snd_i2c_lock(tea->bus);
  87         ucontrol->value.integer.value[0] = tea->mleft - 0x14;
  88         ucontrol->value.integer.value[1] = tea->mright - 0x14;
  89         snd_i2c_unlock(tea->bus);
  90         return 0;
  91 }
  92
  93 static int snd_tea6330t_put_master_volume(struct snd_kcontrol *kcontrol,
  94                                           struct snd_ctl_elem_value *ucontrol)
  95 {
  96         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
  97         int change, count, err;
  98         unsigned char bytes[3];
  99         unsigned char val1, val2;
 100
 101         val1 = (ucontrol->value.integer.value[0] % 44) + 0x14;
 102         val2 = (ucontrol->value.integer.value[1] % 44) + 0x14;
 103         snd_i2c_lock(tea->bus);
 104         change = val1 != tea->mleft || val2 != tea->mright;
 105         tea->mleft = val1;
 106         tea->mright = val2;
 107         count = 0;
 108         if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) {
 109                 bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT;
 110                 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft;
 111         }
 112         if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) {
 113                 if (count == 0)
 114                         bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT;
 115                 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright;
 116         }
 117         if (count > 0) {
 118                 if ((err = snd_i2c_sendbytes(tea->device, bytes, count)) < 0)
 119                         change = err;
 120         }
 121         snd_i2c_unlock(tea->bus);
 122         return change;
 123 }
 124
 125 #define TEA6330T_MASTER_SWITCH(xname, xindex) \
 126 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 127   .info = snd_tea6330t_info_master_switch, \
 128   .get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch }
 129
 130 #define snd_tea6330t_info_master_switch         snd_ctl_boolean_stereo_info
 131
 132 static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol,
 133                                           struct snd_ctl_elem_value *ucontrol)
 134 {
 135         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 136
 137         snd_i2c_lock(tea->bus);
 138         ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
 139         ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
 140         snd_i2c_unlock(tea->bus);
 141         return 0;
 142 }
 143
 144 static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol,
 145                                           struct snd_ctl_elem_value *ucontrol)
 146 {
 147         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 148         int change, err;
 149         unsigned char bytes[3];
 150         unsigned char oval1, oval2, val1, val2;
 151
 152         val1 = ucontrol->value.integer.value[0] & 1;
 153         val2 = ucontrol->value.integer.value[1] & 1;
 154         snd_i2c_lock(tea->bus);
 155         oval1 = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
 156         oval2 = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
 157         change = val1 != oval1 || val2 != oval2;
 158         tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = val1 ? tea->mleft : 0;
 159         tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = val2 ? tea->mright : 0;
 160         bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
 161         bytes[1] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT];
 162         bytes[2] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT];
 163         if ((err = snd_i2c_sendbytes(tea->device, bytes, 3)) < 0)
 164                 change = err;
 165         snd_i2c_unlock(tea->bus);
 166         return change;
 167 }
 168
 169 #define TEA6330T_BASS(xname, xindex) \
 170 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 171   .info = snd_tea6330t_info_bass, \
 172   .get = snd_tea6330t_get_bass, .put = snd_tea6330t_put_bass }
 173
 174 static int snd_tea6330t_info_bass(struct snd_kcontrol *kcontrol,
 175                                   struct snd_ctl_elem_info *uinfo)
 176 {
 177         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 178
 179         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 180         uinfo->count = 1;
 181         uinfo->value.integer.min = 0;
 182         uinfo->value.integer.max = tea->max_bass;
 183         return 0;
 184 }
 185
 186 static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol,
 187                                  struct snd_ctl_elem_value *ucontrol)
 188 {
 189         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 190
 191         ucontrol->value.integer.value[0] = tea->bass;
 192         return 0;
 193 }
 194
 195 static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol,
 196                                  struct snd_ctl_elem_value *ucontrol)
 197 {
 198         struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
 199         int change, err;
 200         unsigned char bytes[2];
 201         unsigned char val1;
 202
 203         val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1);
 204         snd_i2c_lock(tea->bus);
 205         tea->bass = val1;
 206         val1 += tea->equalizer ? 7 : 3;
 207         change = tea->regs[TEA6330T_SADDR_BASS] != val1;
 208         bytes[0] = TEA6330T_SADDR_BASS;
 209         bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1;
 210         if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 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         if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
 258                 change = err;
 259         snd_i2c_unlock(tea->bus);
 260         return change;
 261 }
 262
 263 static const struct snd_kcontrol_new snd_tea6330t_controls[] = {
 264 TEA6330T_MASTER_SWITCH("Master Playback Switch", 0),
 265 TEA6330T_MASTER_VOLUME("Master Playback Volume", 0),
 266 TEA6330T_BASS("Tone Control - Bass", 0),
 267 TEA6330T_TREBLE("Tone Control - Treble", 0)
 268 };
 269
 270 static void snd_tea6330_free(struct snd_i2c_device *device)
 271 {
 272         kfree(device->private_data);
 273 }
 274
 275 int snd_tea6330t_update_mixer(struct snd_card *card,
 276                               struct snd_i2c_bus *bus,
 277                               int equalizer, int fader)
 278 {
 279         struct snd_i2c_device *device;
 280         struct tea6330t *tea;
 281         const struct snd_kcontrol_new *knew;
 282         unsigned int idx;
 283         int err = -ENOMEM;
 284         u8 default_treble, default_bass;
 285         unsigned char bytes[7];
 286
 287         tea = kzalloc(sizeof(*tea), GFP_KERNEL);
 288         if (tea == NULL)
 289                 return -ENOMEM;
 290         if ((err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device)) < 0) {
 291                 kfree(tea);
 292                 return err;
 293         }
 294         tea->device = device;
 295         tea->bus = bus;
 296         tea->equalizer = equalizer;
 297         tea->fader = fader;
 298         device->private_data = tea;
 299         device->private_free = snd_tea6330_free;
 300
 301         snd_i2c_lock(bus);
 302
 303         /* turn fader off and handle equalizer */
 304         tea->regs[TEA6330T_SADDR_FADER] = 0x3f;
 305         tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN;
 306         /* initialize mixer */
 307         if (!tea->equalizer) {
 308                 tea->max_bass = 9;
 309                 tea->max_treble = 8;
 310                 default_bass = 3 + 4;
 311                 tea->bass = 4;
 312                 default_treble = 3 + 4;
 313                 tea->treble = 4;
 314         } else {
 315                 tea->max_bass = 5;
 316                 tea->max_treble = 0;
 317                 default_bass = 7 + 4;
 318                 tea->bass = 4;
 319                 default_treble = 3;
 320                 tea->treble = 0;
 321         }
 322         tea->mleft = tea->mright = 0x14;
 323         tea->regs[TEA6330T_SADDR_BASS] = default_bass;
 324         tea->regs[TEA6330T_SADDR_TREBLE] = default_treble;
 325
 326         /* compose I2C message and put the hardware to initial state */
 327         bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
 328         for (idx = 0; idx < 6; idx++)
 329                 bytes[idx+1] = tea->regs[idx];
 330         if ((err = snd_i2c_sendbytes(device, bytes, 7)) < 0)
 331                 goto __error;
 332
 333         strcat(card->mixername, ",TEA6330T");
 334         if ((err = snd_component_add(card, "TEA6330T")) < 0)
 335                 goto __error;
 336
 337         for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) {
 338                 knew = &snd_tea6330t_controls[idx];
 339                 if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble"))
 340                         continue;
 341                 if ((err = snd_ctl_add(card, snd_ctl_new1(knew, tea))) < 0)
 342                         goto __error;
 343         }
 344
 345         snd_i2c_unlock(bus);
 346         return 0;
 347
 348       __error:
 349         snd_i2c_unlock(bus);
 350         snd_i2c_device_free(device);
 351         return err;
 352 }
 353
 354 EXPORT_SYMBOL(snd_tea6330t_detect);
 355 EXPORT_SYMBOL(snd_tea6330t_update_mixer);