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 snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1); 60 } 61 #endif 62 63 #define TEA6330T_MASTER_VOLUME(xname, xindex) \ 64 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 65 .info = snd_tea6330t_info_master_volume, \ 66 .get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume } 67 68 static int snd_tea6330t_info_master_volume(struct snd_kcontrol *kcontrol, 69 struct snd_ctl_elem_info *uinfo) 70 { 71 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 72 uinfo->count = 2; 73 uinfo->value.integer.min = 0; 74 uinfo->value.integer.max = 43; 75 return 0; 76 } 77 78 static int snd_tea6330t_get_master_volume(struct snd_kcontrol *kcontrol, 79 struct snd_ctl_elem_value *ucontrol) 80 { 81 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 82 83 snd_i2c_lock(tea->bus); 84 ucontrol->value.integer.value[0] = tea->mleft - 0x14; 85 ucontrol->value.integer.value[1] = tea->mright - 0x14; 86 snd_i2c_unlock(tea->bus); 87 return 0; 88 } 89 90 static int snd_tea6330t_put_master_volume(struct snd_kcontrol *kcontrol, 91 struct snd_ctl_elem_value *ucontrol) 92 { 93 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 94 int change, count, err; 95 unsigned char bytes[3]; 96 unsigned char val1, val2; 97 98 val1 = (ucontrol->value.integer.value[0] % 44) + 0x14; 99 val2 = (ucontrol->value.integer.value[1] % 44) + 0x14; 100 snd_i2c_lock(tea->bus); 101 change = val1 != tea->mleft || val2 != tea->mright; 102 tea->mleft = val1; 103 tea->mright = val2; 104 count = 0; 105 if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) { 106 bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT; 107 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft; 108 } 109 if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) { 110 if (count == 0) 111 bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT; 112 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright; 113 } 114 if (count > 0) { 115 err = snd_i2c_sendbytes(tea->device, bytes, count); 116 if (err < 0) 117 change = err; 118 } 119 snd_i2c_unlock(tea->bus); 120 return change; 121 } 122 123 #define TEA6330T_MASTER_SWITCH(xname, xindex) \ 124 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 125 .info = snd_tea6330t_info_master_switch, \ 126 .get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch } 127 128 #define snd_tea6330t_info_master_switch snd_ctl_boolean_stereo_info 129 130 static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol, 131 struct snd_ctl_elem_value *ucontrol) 132 { 133 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 134 135 snd_i2c_lock(tea->bus); 136 ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1; 137 ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1; 138 snd_i2c_unlock(tea->bus); 139 return 0; 140 } 141 142 static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol, 143 struct snd_ctl_elem_value *ucontrol) 144 { 145 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 146 int change, err; 147 unsigned char bytes[3]; 148 unsigned char oval1, oval2, val1, val2; 149 150 val1 = ucontrol->value.integer.value[0] & 1; 151 val2 = ucontrol->value.integer.value[1] & 1; 152 snd_i2c_lock(tea->bus); 153 oval1 = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1; 154 oval2 = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1; 155 change = val1 != oval1 || val2 != oval2; 156 tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = val1 ? tea->mleft : 0; 157 tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = val2 ? tea->mright : 0; 158 bytes[0] = TEA6330T_SADDR_VOLUME_LEFT; 159 bytes[1] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT]; 160 bytes[2] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT]; 161 err = snd_i2c_sendbytes(tea->device, bytes, 3); 162 if (err < 0) 163 change = err; 164 snd_i2c_unlock(tea->bus); 165 return change; 166 } 167 168 #define TEA6330T_BASS(xname, xindex) \ 169 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 170 .info = snd_tea6330t_info_bass, \ 171 .get = snd_tea6330t_get_bass, .put = snd_tea6330t_put_bass } 172 173 static int snd_tea6330t_info_bass(struct snd_kcontrol *kcontrol, 174 struct snd_ctl_elem_info *uinfo) 175 { 176 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 177 178 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 179 uinfo->count = 1; 180 uinfo->value.integer.min = 0; 181 uinfo->value.integer.max = tea->max_bass; 182 return 0; 183 } 184 185 static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol, 186 struct snd_ctl_elem_value *ucontrol) 187 { 188 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 189 190 ucontrol->value.integer.value[0] = tea->bass; 191 return 0; 192 } 193 194 static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol, 195 struct snd_ctl_elem_value *ucontrol) 196 { 197 struct tea6330t *tea = snd_kcontrol_chip(kcontrol); 198 int change, err; 199 unsigned char bytes[2]; 200 unsigned char val1; 201 202 val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1); 203 snd_i2c_lock(tea->bus); 204 tea->bass = val1; 205 val1 += tea->equalizer ? 7 : 3; 206 change = tea->regs[TEA6330T_SADDR_BASS] != val1; 207 bytes[0] = TEA6330T_SADDR_BASS; 208 bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1; 209 err = snd_i2c_sendbytes(tea->device, bytes, 2); 210 if (err < 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 err = snd_i2c_sendbytes(tea->device, bytes, 2); 258 if (err < 0) 259 change = err; 260 snd_i2c_unlock(tea->bus); 261 return change; 262 } 263 264 static const struct snd_kcontrol_new snd_tea6330t_controls[] = { 265 TEA6330T_MASTER_SWITCH("Master Playback Switch", 0), 266 TEA6330T_MASTER_VOLUME("Master Playback Volume", 0), 267 TEA6330T_BASS("Tone Control - Bass", 0), 268 TEA6330T_TREBLE("Tone Control - Treble", 0) 269 }; 270 271 static void snd_tea6330_free(struct snd_i2c_device *device) 272 { 273 kfree(device->private_data); 274 } 275 276 int snd_tea6330t_update_mixer(struct snd_card *card, 277 struct snd_i2c_bus *bus, 278 int equalizer, int fader) 279 { 280 struct snd_i2c_device *device; 281 struct tea6330t *tea; 282 const struct snd_kcontrol_new *knew; 283 unsigned int idx; 284 int err; 285 u8 default_treble, default_bass; 286 unsigned char bytes[7]; 287 288 tea = kzalloc(sizeof(*tea), GFP_KERNEL); 289 if (tea == NULL) 290 return -ENOMEM; 291 err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device); 292 if (err < 0) { 293 kfree(tea); 294 return err; 295 } 296 tea->device = device; 297 tea->bus = bus; 298 tea->equalizer = equalizer; 299 tea->fader = fader; 300 device->private_data = tea; 301 device->private_free = snd_tea6330_free; 302 303 snd_i2c_lock(bus); 304 305 /* turn fader off and handle equalizer */ 306 tea->regs[TEA6330T_SADDR_FADER] = 0x3f; 307 tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN; 308 /* initialize mixer */ 309 if (!tea->equalizer) { 310 tea->max_bass = 9; 311 tea->max_treble = 8; 312 default_bass = 3 + 4; 313 tea->bass = 4; 314 default_treble = 3 + 4; 315 tea->treble = 4; 316 } else { 317 tea->max_bass = 5; 318 tea->max_treble = 0; 319 default_bass = 7 + 4; 320 tea->bass = 4; 321 default_treble = 3; 322 tea->treble = 0; 323 } 324 tea->mleft = tea->mright = 0x14; 325 tea->regs[TEA6330T_SADDR_BASS] = default_bass; 326 tea->regs[TEA6330T_SADDR_TREBLE] = default_treble; 327 328 /* compose I2C message and put the hardware to initial state */ 329 bytes[0] = TEA6330T_SADDR_VOLUME_LEFT; 330 for (idx = 0; idx < 6; idx++) 331 bytes[idx+1] = tea->regs[idx]; 332 err = snd_i2c_sendbytes(device, bytes, 7); 333 if (err < 0) 334 goto __error; 335 336 strcat(card->mixername, ",TEA6330T"); 337 err = snd_component_add(card, "TEA6330T"); 338 if (err < 0) 339 goto __error; 340 341 for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) { 342 knew = &snd_tea6330t_controls[idx]; 343 if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble")) 344 continue; 345 err = snd_ctl_add(card, snd_ctl_new1(knew, tea)); 346 if (err < 0) 347 goto __error; 348 } 349 350 snd_i2c_unlock(bus); 351 return 0; 352 353 __error: 354 snd_i2c_unlock(bus); 355 snd_i2c_device_free(device); 356 return err; 357 } 358 359 EXPORT_SYMBOL(snd_tea6330t_detect); 360 EXPORT_SYMBOL(snd_tea6330t_update_mixer); 361