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 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 static int snd_tea6330t_info_master_switch(struct snd_kcontrol *kcontrol, 146 struct snd_ctl_elem_info *uinfo) 147 { 148 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 149 uinfo->count = 2; 150 uinfo->value.integer.min = 0; 151 uinfo->value.integer.max = 1; 152 return 0; 153 } 154 155 static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol, 156 struct snd_ctl_elem_value *ucontrol) 157 { 158 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 159 160 snd_i2c_lock(tea->bus); 161 ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1; 162 ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1; 163 snd_i2c_unlock(tea->bus); 164 return 0; 165 } 166 167 static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol, 168 struct snd_ctl_elem_value *ucontrol) 169 { 170 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 171 int change, err; 172 unsigned char bytes[3]; 173 unsigned char oval1, oval2, val1, val2; 174 175 val1 = ucontrol->value.integer.value[0] & 1; 176 val2 = ucontrol->value.integer.value[1] & 1; 177 snd_i2c_lock(tea->bus); 178 oval1 = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1; 179 oval2 = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1; 180 change = val1 != oval1 || val2 != oval2; 181 tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = val1 ? tea->mleft : 0; 182 tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = val2 ? tea->mright : 0; 183 bytes[0] = TEA6330T_SADDR_VOLUME_LEFT; 184 bytes[1] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT]; 185 bytes[2] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT]; 186 if ((err = snd_i2c_sendbytes(tea->device, bytes, 3)) < 0) 187 change = err; 188 snd_i2c_unlock(tea->bus); 189 return change; 190 } 191 192 #define TEA6330T_BASS(xname, xindex) \ 193 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 194 .info = snd_tea6330t_info_bass, \ 195 .get = snd_tea6330t_get_bass, .put = snd_tea6330t_put_bass } 196 197 static int snd_tea6330t_info_bass(struct snd_kcontrol *kcontrol, 198 struct snd_ctl_elem_info *uinfo) 199 { 200 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 201 202 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 203 uinfo->count = 1; 204 uinfo->value.integer.min = 0; 205 uinfo->value.integer.max = tea->max_bass; 206 return 0; 207 } 208 209 static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol, 210 struct snd_ctl_elem_value *ucontrol) 211 { 212 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 213 214 ucontrol->value.integer.value[0] = tea->bass; 215 return 0; 216 } 217 218 static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol, 219 struct snd_ctl_elem_value *ucontrol) 220 { 221 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 222 int change, err; 223 unsigned char bytes[2]; 224 unsigned char val1; 225 226 val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1); 227 snd_i2c_lock(tea->bus); 228 tea->bass = val1; 229 val1 += tea->equalizer ? 7 : 3; 230 change = tea->regs[TEA6330T_SADDR_BASS] != val1; 231 bytes[0] = TEA6330T_SADDR_BASS; 232 bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1; 233 if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0) 234 change = err; 235 snd_i2c_unlock(tea->bus); 236 return change; 237 } 238 239 #define TEA6330T_TREBLE(xname, xindex) \ 240 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 241 .info = snd_tea6330t_info_treble, \ 242 .get = snd_tea6330t_get_treble, .put = snd_tea6330t_put_treble } 243 244 static int snd_tea6330t_info_treble(struct snd_kcontrol *kcontrol, 245 struct snd_ctl_elem_info *uinfo) 246 { 247 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 248 249 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 250 uinfo->count = 1; 251 uinfo->value.integer.min = 0; 252 uinfo->value.integer.max = tea->max_treble; 253 return 0; 254 } 255 256 static int snd_tea6330t_get_treble(struct snd_kcontrol *kcontrol, 257 struct snd_ctl_elem_value *ucontrol) 258 { 259 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 260 261 ucontrol->value.integer.value[0] = tea->treble; 262 return 0; 263 } 264 265 static int snd_tea6330t_put_treble(struct snd_kcontrol *kcontrol, 266 struct snd_ctl_elem_value *ucontrol) 267 { 268 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 269 int change, err; 270 unsigned char bytes[2]; 271 unsigned char val1; 272 273 val1 = ucontrol->value.integer.value[0] % (tea->max_treble + 1); 274 snd_i2c_lock(tea->bus); 275 tea->treble = val1; 276 val1 += 3; 277 change = tea->regs[TEA6330T_SADDR_TREBLE] != val1; 278 bytes[0] = TEA6330T_SADDR_TREBLE; 279 bytes[1] = tea->regs[TEA6330T_SADDR_TREBLE] = val1; 280 if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0) 281 change = err; 282 snd_i2c_unlock(tea->bus); 283 return change; 284 } 285 286 static struct snd_kcontrol_new snd_tea6330t_controls[] = { 287 TEA6330T_MASTER_SWITCH("Master Playback Switch", 0), 288 TEA6330T_MASTER_VOLUME("Master Playback Volume", 0), 289 TEA6330T_BASS("Tone Control - Bass", 0), 290 TEA6330T_TREBLE("Tone Control - Treble", 0) 291 }; 292 293 static void snd_tea6330_free(struct snd_i2c_device *device) 294 { 295 kfree(device->private_data); 296 } 297 298 int snd_tea6330t_update_mixer(struct snd_card *card, 299 struct snd_i2c_bus *bus, 300 int equalizer, int fader) 301 { 302 struct snd_i2c_device *device; 303 struct tea6330t *tea; 304 struct snd_kcontrol_new *knew; 305 unsigned int idx; 306 int err = -ENOMEM; 307 u8 default_treble, default_bass; 308 unsigned char bytes[7]; 309 310 tea = kzalloc(sizeof(*tea), GFP_KERNEL); 311 if (tea == NULL) 312 return -ENOMEM; 313 if ((err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device)) < 0) { 314 kfree(tea); 315 return err; 316 } 317 tea->device = device; 318 tea->bus = bus; 319 tea->equalizer = equalizer; 320 tea->fader = fader; 321 device->private_data = tea; 322 device->private_free = snd_tea6330_free; 323 324 snd_i2c_lock(bus); 325 326 /* turn fader off and handle equalizer */ 327 tea->regs[TEA6330T_SADDR_FADER] = 0x3f; 328 tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN; 329 /* initialize mixer */ 330 if (!tea->equalizer) { 331 tea->max_bass = 9; 332 tea->max_treble = 8; 333 default_bass = 3 + 4; 334 tea->bass = 4; 335 default_treble = 3 + 4; 336 tea->treble = 4; 337 } else { 338 tea->max_bass = 5; 339 tea->max_treble = 0; 340 default_bass = 7 + 4; 341 tea->bass = 4; 342 default_treble = 3; 343 tea->treble = 0; 344 } 345 tea->mleft = tea->mright = 0x14; 346 tea->regs[TEA6330T_SADDR_BASS] = default_bass; 347 tea->regs[TEA6330T_SADDR_TREBLE] = default_treble; 348 349 /* compose I2C message and put the hardware to initial state */ 350 bytes[0] = TEA6330T_SADDR_VOLUME_LEFT; 351 for (idx = 0; idx < 6; idx++) 352 bytes[idx+1] = tea->regs[idx]; 353 if ((err = snd_i2c_sendbytes(device, bytes, 7)) < 0) 354 goto __error; 355 356 strcat(card->mixername, ",TEA6330T"); 357 if ((err = snd_component_add(card, "TEA6330T")) < 0) 358 goto __error; 359 360 for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) { 361 knew = &snd_tea6330t_controls[idx]; 362 if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble")) 363 continue; 364 if ((err = snd_ctl_add(card, snd_ctl_new1(knew, tea))) < 0) 365 goto __error; 366 } 367 368 snd_i2c_unlock(bus); 369 return 0; 370 371 __error: 372 snd_i2c_unlock(bus); 373 snd_i2c_device_free(device); 374 return err; 375 } 376 377 EXPORT_SYMBOL(snd_tea6330t_detect); 378 EXPORT_SYMBOL(snd_tea6330t_update_mixer); 379 380 /* 381 * INIT part 382 */ 383 384 static int __init alsa_tea6330t_init(void) 385 { 386 return 0; 387 } 388 389 static void __exit alsa_tea6330t_exit(void) 390 { 391 } 392 393 module_init(alsa_tea6330t_init) 394 module_exit(alsa_tea6330t_exit) 395