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@suse.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@suse.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 typedef struct {
  48         snd_i2c_device_t *device;
  49         snd_i2c_bus_t *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 } tea6330t_t;
  57
  58 int snd_tea6330t_detect(snd_i2c_bus_t *bus, int equalizer)
  59 {
  60         int res;
  61
  62         snd_i2c_lock(bus);
  63         res = snd_i2c_probeaddr(bus, TEA6330T_ADDR);
  64         snd_i2c_unlock(bus);
  65         return res;
  66 }
  67
  68 #if 0
  69 static void snd_tea6330t_set(tea6330t_t *tea,
  70                              unsigned char addr, unsigned char value)
  71 {
  72 #if 0
  73         printk(KERN_DEBUG "set - 0x%x/0x%x\n", addr, value);
  74 #endif
  75         snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1);
  76 }
  77 #endif
  78
  79 #define TEA6330T_MASTER_VOLUME(xname, xindex) \
  80 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  81   .info = snd_tea6330t_info_master_volume, \
  82   .get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume }
  83
  84 static int snd_tea6330t_info_master_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
  85 {
  86         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  87         uinfo->count = 2;
  88         uinfo->value.integer.min = 0;
  89         uinfo->value.integer.max = 43;
  90         return 0;
  91 }
  92
  93 static int snd_tea6330t_get_master_volume(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
  94 {
  95         tea6330t_t *tea = snd_kcontrol_chip(kcontrol);
  96
  97         snd_i2c_lock(tea->bus);
  98         ucontrol->value.integer.value[0] = tea->mleft - 0x14;
  99         ucontrol->value.integer.value[1] = tea->mright - 0x14;
 100         snd_i2c_unlock(tea->bus);
 101         return 0;
 102 }
 103
 104 static int snd_tea6330t_put_master_volume(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 105 {
 106         tea6330t_t *tea = snd_kcontrol_chip(kcontrol);
 107         int change, count, err;
 108         unsigned char bytes[3];
 109         unsigned char val1, val2;
 110
 111         val1 = (ucontrol->value.integer.value[0] % 44) + 0x14;
 112         val2 = (ucontrol->value.integer.value[1] % 44) + 0x14;
 113         snd_i2c_lock(tea->bus);
 114         change = val1 != tea->mleft || val2 != tea->mright;
 115         tea->mleft = val1;
 116         tea->mright = val2;
 117         count = 0;
 118         if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) {
 119                 bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT;
 120                 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft;
 121         }
 122         if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) {
 123                 if (count == 0)
 124                         bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT;
 125                 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright;
 126         }
 127         if (count > 0) {
 128                 if ((err = snd_i2c_sendbytes(tea->device, bytes, count)) < 0)
 129                         change = err;
 130         }
 131         snd_i2c_unlock(tea->bus);
 132         return change;
 133 }
 134
 135 #define TEA6330T_MASTER_SWITCH(xname, xindex) \
 136 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 137   .info = snd_tea6330t_info_master_switch, \
 138   .get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch }
 139
 140 static int snd_tea6330t_info_master_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
 141 {
 142         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 143         uinfo->count = 2;
 144         uinfo->value.integer.min = 0;
 145         uinfo->value.integer.max = 1;
 146         return 0;
 147 }
 148
 149 static int snd_tea6330t_get_master_switch(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 150 {
 151         tea6330t_t *tea = snd_kcontrol_chip(kcontrol);
 152
 153         snd_i2c_lock(tea->bus);
 154         ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
 155         ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
 156         snd_i2c_unlock(tea->bus);
 157         return 0;
 158 }
 159
 160 static int snd_tea6330t_put_master_switch(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 161 {
 162         tea6330t_t *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(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
 190 {
 191         tea6330t_t *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(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 201 {
 202         tea6330t_t *tea = snd_kcontrol_chip(kcontrol);
 203
 204         ucontrol->value.integer.value[0] = tea->bass;
 205         return 0;
 206 }
 207
 208 static int snd_tea6330t_put_bass(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 209 {
 210         tea6330t_t *tea = snd_kcontrol_chip(kcontrol);
 211         int change, err;
 212         unsigned char bytes[2];
 213         unsigned char val1;
 214
 215         val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1);
 216         snd_i2c_lock(tea->bus);
 217         tea->bass = val1;
 218         val1 += tea->equalizer ? 7 : 3;
 219         change = tea->regs[TEA6330T_SADDR_BASS] != val1;
 220         bytes[0] = TEA6330T_SADDR_BASS;
 221         bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1;
 222         if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
 223                 change = err;
 224         snd_i2c_unlock(tea->bus);
 225         return change;
 226 }
 227
 228 #define TEA6330T_TREBLE(xname, xindex) \
 229 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 230   .info = snd_tea6330t_info_treble, \
 231   .get = snd_tea6330t_get_treble, .put = snd_tea6330t_put_treble }
 232
 233 static int snd_tea6330t_info_treble(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
 234 {
 235         tea6330t_t *tea = snd_kcontrol_chip(kcontrol);
 236
 237         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 238         uinfo->count = 1;
 239         uinfo->value.integer.min = 0;
 240         uinfo->value.integer.max = tea->max_treble;
 241         return 0;
 242 }
 243
 244 static int snd_tea6330t_get_treble(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 245 {
 246         tea6330t_t *tea = snd_kcontrol_chip(kcontrol);
 247
 248         ucontrol->value.integer.value[0] = tea->treble;
 249         return 0;
 250 }
 251
 252 static int snd_tea6330t_put_treble(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 253 {
 254         tea6330t_t *tea = snd_kcontrol_chip(kcontrol);
 255         int change, err;
 256         unsigned char bytes[2];
 257         unsigned char val1;
 258
 259         val1 = ucontrol->value.integer.value[0] % (tea->max_treble + 1);
 260         snd_i2c_lock(tea->bus);
 261         tea->treble = val1;
 262         val1 += 3;
 263         change = tea->regs[TEA6330T_SADDR_TREBLE] != val1;
 264         bytes[0] = TEA6330T_SADDR_TREBLE;
 265         bytes[1] = tea->regs[TEA6330T_SADDR_TREBLE] = val1;
 266         if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
 267                 change = err;
 268         snd_i2c_unlock(tea->bus);
 269         return change;
 270 }
 271
 272 static snd_kcontrol_new_t snd_tea6330t_controls[] = {
 273 TEA6330T_MASTER_SWITCH("Master Playback Switch", 0),
 274 TEA6330T_MASTER_VOLUME("Master Playback Volume", 0),
 275 TEA6330T_BASS("Tone Control - Bass", 0),
 276 TEA6330T_TREBLE("Tone Control - Treble", 0)
 277 };
 278
 279 static void snd_tea6330_free(snd_i2c_device_t *device)
 280 {
 281         kfree(device->private_data);
 282 }
 283
 284 int snd_tea6330t_update_mixer(snd_card_t * card,
 285                               snd_i2c_bus_t *bus,
 286                               int equalizer, int fader)
 287 {
 288         snd_i2c_device_t *device;
 289         tea6330t_t *tea;
 290         snd_kcontrol_new_t *knew;
 291         unsigned int idx;
 292         int err = -ENOMEM;
 293         u8 default_treble, default_bass;
 294         unsigned char bytes[7];
 295
 296         tea = kzalloc(sizeof(*tea), GFP_KERNEL);
 297         if (tea == NULL)
 298                 return -ENOMEM;
 299         if ((err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device)) < 0) {
 300                 kfree(tea);
 301                 return err;
 302         }
 303         tea->device = device;
 304         tea->bus = bus;
 305         tea->equalizer = equalizer;
 306         tea->fader = fader;
 307         device->private_data = tea;
 308         device->private_free = snd_tea6330_free;
 309
 310         snd_i2c_lock(bus);
 311
 312         /* turn fader off and handle equalizer */
 313         tea->regs[TEA6330T_SADDR_FADER] = 0x3f;
 314         tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN;
 315         /* initialize mixer */
 316         if (!tea->equalizer) {
 317                 tea->max_bass = 9;
 318                 tea->max_treble = 8;
 319                 default_bass = 3 + 4;
 320                 tea->bass = 4;
 321                 default_treble = 3 + 4;
 322                 tea->treble = 4;
 323         } else {
 324                 tea->max_bass = 5;
 325                 tea->max_treble = 0;
 326                 default_bass = 7 + 4;
 327                 tea->bass = 4;
 328                 default_treble = 3;
 329                 tea->treble = 0;
 330         }
 331         tea->mleft = tea->mright = 0x14;
 332         tea->regs[TEA6330T_SADDR_BASS] = default_bass;
 333         tea->regs[TEA6330T_SADDR_TREBLE] = default_treble;
 334
 335         /* compose I2C message and put the hardware to initial state */
 336         bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
 337         for (idx = 0; idx < 6; idx++)
 338                 bytes[idx+1] = tea->regs[idx];
 339         if ((err = snd_i2c_sendbytes(device, bytes, 7)) < 0)
 340                 goto __error;
 341
 342         strcat(card->mixername, ",TEA6330T");
 343         if ((err = snd_component_add(card, "TEA6330T")) < 0)
 344                 goto __error;
 345
 346         for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) {
 347                 knew = &snd_tea6330t_controls[idx];
 348                 if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble"))
 349                         continue;
 350                 if ((err = snd_ctl_add(card, snd_ctl_new1(knew, tea))) < 0)
 351                         goto __error;
 352         }
 353
 354         snd_i2c_unlock(bus);
 355         return 0;
 356
 357       __error:
 358         snd_i2c_unlock(bus);
 359         snd_i2c_device_free(device);
 360         return err;
 361 }
 362
 363 EXPORT_SYMBOL(snd_tea6330t_detect);
 364 EXPORT_SYMBOL(snd_tea6330t_update_mixer);
 365
 366 /*
 367  *  INIT part
 368  */
 369
 370 static int __init alsa_tea6330t_init(void)
 371 {
 372         return 0;
 373 }
 374
 375 static void __exit alsa_tea6330t_exit(void)
 376 {
 377 }
 378
 379 module_init(alsa_tea6330t_init)
 380 module_exit(alsa_tea6330t_exit)