Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: 12d82b5582
Fetching contributors…

Cannot retrieve contributors at this time

file 385 lines (333 sloc) 11.555 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385
/*
* Routines for control of the TEA6330T circuit via i2c bus
* Sound fader control circuit for car radios by Philips Semiconductors
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/

#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/tea6330t.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for control of the TEA6330T circuit via i2c bus");
MODULE_LICENSE("GPL");

#define TEA6330T_ADDR (0x80>>1) /* fixed address */

#define TEA6330T_SADDR_VOLUME_LEFT 0x00 /* volume left */
#define TEA6330T_SADDR_VOLUME_RIGHT 0x01 /* volume right */
#define TEA6330T_SADDR_BASS 0x02 /* bass control */
#define TEA6330T_SADDR_TREBLE 0x03 /* treble control */
#define TEA6330T_SADDR_FADER 0x04 /* fader control */
#define TEA6330T_MFN 0x20 /* mute control for selected channels */
#define TEA6330T_FCH 0x10 /* select fader channels - front or rear */
#define TEA6330T_SADDR_AUDIO_SWITCH 0x05 /* audio switch */
#define TEA6330T_GMU 0x80 /* mute control, general mute */
#define TEA6330T_EQN 0x40 /* equalizer switchover (0=equalizer-on) */


struct tea6330t {
struct snd_i2c_device *device;
struct snd_i2c_bus *bus;
int equalizer;
int fader;
unsigned char regs[8];
unsigned char mleft, mright;
unsigned char bass, treble;
unsigned char max_bass, max_treble;
};


int snd_tea6330t_detect(struct snd_i2c_bus *bus, int equalizer)
{
int res;

snd_i2c_lock(bus);
res = snd_i2c_probeaddr(bus, TEA6330T_ADDR);
snd_i2c_unlock(bus);
return res;
}

#if 0
static void snd_tea6330t_set(struct tea6330t *tea,
unsigned char addr, unsigned char value)
{
#if 0
printk(KERN_DEBUG "set - 0x%x/0x%x\n", addr, value);
#endif
snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1);
}
#endif

#define TEA6330T_MASTER_VOLUME(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
.info = snd_tea6330t_info_master_volume, \
.get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume }

static int snd_tea6330t_info_master_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 43;
return 0;
}

static int snd_tea6330t_get_master_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);

snd_i2c_lock(tea->bus);
ucontrol->value.integer.value[0] = tea->mleft - 0x14;
ucontrol->value.integer.value[1] = tea->mright - 0x14;
snd_i2c_unlock(tea->bus);
return 0;
}

static int snd_tea6330t_put_master_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
int change, count, err;
unsigned char bytes[3];
unsigned char val1, val2;

val1 = (ucontrol->value.integer.value[0] % 44) + 0x14;
val2 = (ucontrol->value.integer.value[1] % 44) + 0x14;
snd_i2c_lock(tea->bus);
change = val1 != tea->mleft || val2 != tea->mright;
tea->mleft = val1;
tea->mright = val2;
count = 0;
if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) {
bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT;
bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft;
}
if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) {
if (count == 0)
bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT;
bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright;
}
if (count > 0) {
if ((err = snd_i2c_sendbytes(tea->device, bytes, count)) < 0)
change = err;
}
snd_i2c_unlock(tea->bus);
return change;
}

#define TEA6330T_MASTER_SWITCH(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
.info = snd_tea6330t_info_master_switch, \
.get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch }

#define snd_tea6330t_info_master_switch snd_ctl_boolean_stereo_info

static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);

snd_i2c_lock(tea->bus);
ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
snd_i2c_unlock(tea->bus);
return 0;
}

static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
int change, err;
unsigned char bytes[3];
unsigned char oval1, oval2, val1, val2;

val1 = ucontrol->value.integer.value[0] & 1;
val2 = ucontrol->value.integer.value[1] & 1;
snd_i2c_lock(tea->bus);
oval1 = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
oval2 = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
change = val1 != oval1 || val2 != oval2;
tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = val1 ? tea->mleft : 0;
tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = val2 ? tea->mright : 0;
bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
bytes[1] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT];
bytes[2] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT];
if ((err = snd_i2c_sendbytes(tea->device, bytes, 3)) < 0)
change = err;
snd_i2c_unlock(tea->bus);
return change;
}

#define TEA6330T_BASS(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
.info = snd_tea6330t_info_bass, \
.get = snd_tea6330t_get_bass, .put = snd_tea6330t_put_bass }

static int snd_tea6330t_info_bass(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);

uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = tea->max_bass;
return 0;
}

static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);

ucontrol->value.integer.value[0] = tea->bass;
return 0;
}

static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
int change, err;
unsigned char bytes[2];
unsigned char val1;

val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1);
snd_i2c_lock(tea->bus);
tea->bass = val1;
val1 += tea->equalizer ? 7 : 3;
change = tea->regs[TEA6330T_SADDR_BASS] != val1;
bytes[0] = TEA6330T_SADDR_BASS;
bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1;
if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
change = err;
snd_i2c_unlock(tea->bus);
return change;
}

#define TEA6330T_TREBLE(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
.info = snd_tea6330t_info_treble, \
.get = snd_tea6330t_get_treble, .put = snd_tea6330t_put_treble }

static int snd_tea6330t_info_treble(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);

uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = tea->max_treble;
return 0;
}

static int snd_tea6330t_get_treble(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);

ucontrol->value.integer.value[0] = tea->treble;
return 0;
}

static int snd_tea6330t_put_treble(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
int change, err;
unsigned char bytes[2];
unsigned char val1;

val1 = ucontrol->value.integer.value[0] % (tea->max_treble + 1);
snd_i2c_lock(tea->bus);
tea->treble = val1;
val1 += 3;
change = tea->regs[TEA6330T_SADDR_TREBLE] != val1;
bytes[0] = TEA6330T_SADDR_TREBLE;
bytes[1] = tea->regs[TEA6330T_SADDR_TREBLE] = val1;
if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
change = err;
snd_i2c_unlock(tea->bus);
return change;
}

static struct snd_kcontrol_new snd_tea6330t_controls[] = {
TEA6330T_MASTER_SWITCH("Master Playback Switch", 0),
TEA6330T_MASTER_VOLUME("Master Playback Volume", 0),
TEA6330T_BASS("Tone Control - Bass", 0),
TEA6330T_TREBLE("Tone Control - Treble", 0)
};

static void snd_tea6330_free(struct snd_i2c_device *device)
{
kfree(device->private_data);
}
                                        
int snd_tea6330t_update_mixer(struct snd_card *card,
struct snd_i2c_bus *bus,
int equalizer, int fader)
{
struct snd_i2c_device *device;
struct tea6330t *tea;
struct snd_kcontrol_new *knew;
unsigned int idx;
int err = -ENOMEM;
u8 default_treble, default_bass;
unsigned char bytes[7];

tea = kzalloc(sizeof(*tea), GFP_KERNEL);
if (tea == NULL)
return -ENOMEM;
if ((err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device)) < 0) {
kfree(tea);
return err;
}
tea->device = device;
tea->bus = bus;
tea->equalizer = equalizer;
tea->fader = fader;
device->private_data = tea;
device->private_free = snd_tea6330_free;

snd_i2c_lock(bus);

/* turn fader off and handle equalizer */
tea->regs[TEA6330T_SADDR_FADER] = 0x3f;
tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN;
/* initialize mixer */
if (!tea->equalizer) {
tea->max_bass = 9;
tea->max_treble = 8;
default_bass = 3 + 4;
tea->bass = 4;
default_treble = 3 + 4;
tea->treble = 4;
} else {
tea->max_bass = 5;
tea->max_treble = 0;
default_bass = 7 + 4;
tea->bass = 4;
default_treble = 3;
tea->treble = 0;
}
tea->mleft = tea->mright = 0x14;
tea->regs[TEA6330T_SADDR_BASS] = default_bass;
tea->regs[TEA6330T_SADDR_TREBLE] = default_treble;

/* compose I2C message and put the hardware to initial state */
bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
for (idx = 0; idx < 6; idx++)
bytes[idx+1] = tea->regs[idx];
if ((err = snd_i2c_sendbytes(device, bytes, 7)) < 0)
goto __error;

strcat(card->mixername, ",TEA6330T");
if ((err = snd_component_add(card, "TEA6330T")) < 0)
goto __error;

for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) {
knew = &snd_tea6330t_controls[idx];
if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble"))
continue;
if ((err = snd_ctl_add(card, snd_ctl_new1(knew, tea))) < 0)
goto __error;
}

snd_i2c_unlock(bus);
return 0;

      __error:
       snd_i2c_unlock(bus);
       snd_i2c_device_free(device);
       return err;
}

EXPORT_SYMBOL(snd_tea6330t_detect);
EXPORT_SYMBOL(snd_tea6330t_update_mixer);

/*
* INIT part
*/

static int __init alsa_tea6330t_init(void)
{
return 0;
}

static void __exit alsa_tea6330t_exit(void)
{
}

module_init(alsa_tea6330t_init)
module_exit(alsa_tea6330t_exit)
Something went wrong with that request. Please try again.