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
snd_tea6330t_detect(struct snd_i2c_bus * bus,int equalizer)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
snd_tea6330t_info_master_volume(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)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
snd_tea6330t_get_master_volume(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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
snd_tea6330t_put_master_volume(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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
snd_tea6330t_get_master_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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
snd_tea6330t_put_master_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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
snd_tea6330t_info_bass(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)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
snd_tea6330t_get_bass(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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
snd_tea6330t_put_bass(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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
snd_tea6330t_info_treble(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)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
snd_tea6330t_get_treble(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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
snd_tea6330t_put_treble(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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
snd_tea6330_free(struct snd_i2c_device * device)271 static void snd_tea6330_free(struct snd_i2c_device *device)
272 {
273 kfree(device->private_data);
274 }
275
snd_tea6330t_update_mixer(struct snd_card * card,struct snd_i2c_bus * bus,int equalizer,int fader)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