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 <linux/module.h> 26 #include <sound/core.h> 27 #include <sound/control.h> 28 #include <sound/tea6330t.h> 29 30 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.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 48 struct tea6330t { 49 struct snd_i2c_device *device; 50 struct snd_i2c_bus *bus; 51 int equalizer; 52 int fader; 53 unsigned char regs[8]; 54 unsigned char mleft, mright; 55 unsigned char bass, treble; 56 unsigned char max_bass, max_treble; 57 }; 58 59 60 int snd_tea6330t_detect(struct snd_i2c_bus *bus, int equalizer) 61 { 62 int res; 63 64 snd_i2c_lock(bus); 65 res = snd_i2c_probeaddr(bus, TEA6330T_ADDR); 66 snd_i2c_unlock(bus); 67 return res; 68 } 69 70 #if 0 71 static void snd_tea6330t_set(struct tea6330t *tea, 72 unsigned char addr, unsigned char value) 73 { 74 #if 0 75 printk(KERN_DEBUG "set - 0x%x/0x%x\n", addr, value); 76 #endif 77 snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1); 78 } 79 #endif 80 81 #define TEA6330T_MASTER_VOLUME(xname, xindex) \ 82 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 83 .info = snd_tea6330t_info_master_volume, \ 84 .get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume } 85 86 static int snd_tea6330t_info_master_volume(struct snd_kcontrol *kcontrol, 87 struct snd_ctl_elem_info *uinfo) 88 { 89 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 90 uinfo->count = 2; 91 uinfo->value.integer.min = 0; 92 uinfo->value.integer.max = 43; 93 return 0; 94 } 95 96 static int snd_tea6330t_get_master_volume(struct snd_kcontrol *kcontrol, 97 struct snd_ctl_elem_value *ucontrol) 98 { 99 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 100 101 snd_i2c_lock(tea->bus); 102 ucontrol->value.integer.value[0] = tea->mleft - 0x14; 103 ucontrol->value.integer.value[1] = tea->mright - 0x14; 104 snd_i2c_unlock(tea->bus); 105 return 0; 106 } 107 108 static int snd_tea6330t_put_master_volume(struct snd_kcontrol *kcontrol, 109 struct snd_ctl_elem_value *ucontrol) 110 { 111 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 112 int change, count, err; 113 unsigned char bytes[3]; 114 unsigned char val1, val2; 115 116 val1 = (ucontrol->value.integer.value[0] % 44) + 0x14; 117 val2 = (ucontrol->value.integer.value[1] % 44) + 0x14; 118 snd_i2c_lock(tea->bus); 119 change = val1 != tea->mleft || val2 != tea->mright; 120 tea->mleft = val1; 121 tea->mright = val2; 122 count = 0; 123 if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) { 124 bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT; 125 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft; 126 } 127 if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) { 128 if (count == 0) 129 bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT; 130 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright; 131 } 132 if (count > 0) { 133 if ((err = snd_i2c_sendbytes(tea->device, bytes, count)) < 0) 134 change = err; 135 } 136 snd_i2c_unlock(tea->bus); 137 return change; 138 } 139 140 #define TEA6330T_MASTER_SWITCH(xname, xindex) \ 141 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 142 .info = snd_tea6330t_info_master_switch, \ 143 .get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch } 144 145 #define snd_tea6330t_info_master_switch snd_ctl_boolean_stereo_info 146 147 static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol, 148 struct snd_ctl_elem_value *ucontrol) 149 { 150 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 151 152 snd_i2c_lock(tea->bus); 153 ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1; 154 ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1; 155 snd_i2c_unlock(tea->bus); 156 return 0; 157 } 158 159 static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol, 160 struct snd_ctl_elem_value *ucontrol) 161 { 162 struct tea6330t *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(struct snd_kcontrol *kcontrol, 190 struct snd_ctl_elem_info *uinfo) 191 { 192 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 193 194 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 195 uinfo->count = 1; 196 uinfo->value.integer.min = 0; 197 uinfo->value.integer.max = tea->max_bass; 198 return 0; 199 } 200 201 static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol, 202 struct snd_ctl_elem_value *ucontrol) 203 { 204 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 205 206 ucontrol->value.integer.value[0] = tea->bass; 207 return 0; 208 } 209 210 static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol, 211 struct snd_ctl_elem_value *ucontrol) 212 { 213 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 214 int change, err; 215 unsigned char bytes[2]; 216 unsigned char val1; 217 218 val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1); 219 snd_i2c_lock(tea->bus); 220 tea->bass = val1; 221 val1 += tea->equalizer ? 7 : 3; 222 change = tea->regs[TEA6330T_SADDR_BASS] != val1; 223 bytes[0] = TEA6330T_SADDR_BASS; 224 bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1; 225 if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0) 226 change = err; 227 snd_i2c_unlock(tea->bus); 228 return change; 229 } 230 231 #define TEA6330T_TREBLE(xname, xindex) \ 232 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 233 .info = snd_tea6330t_info_treble, \ 234 .get = snd_tea6330t_get_treble, .put = snd_tea6330t_put_treble } 235 236 static int snd_tea6330t_info_treble(struct snd_kcontrol *kcontrol, 237 struct snd_ctl_elem_info *uinfo) 238 { 239 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 240 241 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 242 uinfo->count = 1; 243 uinfo->value.integer.min = 0; 244 uinfo->value.integer.max = tea->max_treble; 245 return 0; 246 } 247 248 static int snd_tea6330t_get_treble(struct snd_kcontrol *kcontrol, 249 struct snd_ctl_elem_value *ucontrol) 250 { 251 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 252 253 ucontrol->value.integer.value[0] = tea->treble; 254 return 0; 255 } 256 257 static int snd_tea6330t_put_treble(struct snd_kcontrol *kcontrol, 258 struct snd_ctl_elem_value *ucontrol) 259 { 260 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 261 int change, err; 262 unsigned char bytes[2]; 263 unsigned char val1; 264 265 val1 = ucontrol->value.integer.value[0] % (tea->max_treble + 1); 266 snd_i2c_lock(tea->bus); 267 tea->treble = val1; 268 val1 += 3; 269 change = tea->regs[TEA6330T_SADDR_TREBLE] != val1; 270 bytes[0] = TEA6330T_SADDR_TREBLE; 271 bytes[1] = tea->regs[TEA6330T_SADDR_TREBLE] = val1; 272 if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0) 273 change = err; 274 snd_i2c_unlock(tea->bus); 275 return change; 276 } 277 278 static struct snd_kcontrol_new snd_tea6330t_controls[] = { 279 TEA6330T_MASTER_SWITCH("Master Playback Switch", 0), 280 TEA6330T_MASTER_VOLUME("Master Playback Volume", 0), 281 TEA6330T_BASS("Tone Control - Bass", 0), 282 TEA6330T_TREBLE("Tone Control - Treble", 0) 283 }; 284 285 static void snd_tea6330_free(struct snd_i2c_device *device) 286 { 287 kfree(device->private_data); 288 } 289 290 int snd_tea6330t_update_mixer(struct snd_card *card, 291 struct snd_i2c_bus *bus, 292 int equalizer, int fader) 293 { 294 struct snd_i2c_device *device; 295 struct tea6330t *tea; 296 struct snd_kcontrol_new *knew; 297 unsigned int idx; 298 int err = -ENOMEM; 299 u8 default_treble, default_bass; 300 unsigned char bytes[7]; 301 302 tea = kzalloc(sizeof(*tea), GFP_KERNEL); 303 if (tea == NULL) 304 return -ENOMEM; 305 if ((err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device)) < 0) { 306 kfree(tea); 307 return err; 308 } 309 tea->device = device; 310 tea->bus = bus; 311 tea->equalizer = equalizer; 312 tea->fader = fader; 313 device->private_data = tea; 314 device->private_free = snd_tea6330_free; 315 316 snd_i2c_lock(bus); 317 318 /* turn fader off and handle equalizer */ 319 tea->regs[TEA6330T_SADDR_FADER] = 0x3f; 320 tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN; 321 /* initialize mixer */ 322 if (!tea->equalizer) { 323 tea->max_bass = 9; 324 tea->max_treble = 8; 325 default_bass = 3 + 4; 326 tea->bass = 4; 327 default_treble = 3 + 4; 328 tea->treble = 4; 329 } else { 330 tea->max_bass = 5; 331 tea->max_treble = 0; 332 default_bass = 7 + 4; 333 tea->bass = 4; 334 default_treble = 3; 335 tea->treble = 0; 336 } 337 tea->mleft = tea->mright = 0x14; 338 tea->regs[TEA6330T_SADDR_BASS] = default_bass; 339 tea->regs[TEA6330T_SADDR_TREBLE] = default_treble; 340 341 /* compose I2C message and put the hardware to initial state */ 342 bytes[0] = TEA6330T_SADDR_VOLUME_LEFT; 343 for (idx = 0; idx < 6; idx++) 344 bytes[idx+1] = tea->regs[idx]; 345 if ((err = snd_i2c_sendbytes(device, bytes, 7)) < 0) 346 goto __error; 347 348 strcat(card->mixername, ",TEA6330T"); 349 if ((err = snd_component_add(card, "TEA6330T")) < 0) 350 goto __error; 351 352 for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) { 353 knew = &snd_tea6330t_controls[idx]; 354 if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble")) 355 continue; 356 if ((err = snd_ctl_add(card, snd_ctl_new1(knew, tea))) < 0) 357 goto __error; 358 } 359 360 snd_i2c_unlock(bus); 361 return 0; 362 363 __error: 364 snd_i2c_unlock(bus); 365 snd_i2c_device_free(device); 366 return err; 367 } 368 369 EXPORT_SYMBOL(snd_tea6330t_detect); 370 EXPORT_SYMBOL(snd_tea6330t_update_mixer); 371 372 /* 373 * INIT part 374 */ 375 376 static int __init alsa_tea6330t_init(void) 377 { 378 return 0; 379 } 380 381 static void __exit alsa_tea6330t_exit(void) 382 { 383 } 384 385 module_init(alsa_tea6330t_init) 386 module_exit(alsa_tea6330t_exit) 387