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 #if 0
60 printk(KERN_DEBUG "set - 0x%x/0x%x\n", addr, value);
61 #endif
62 snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1);
63 }
64 #endif
65
66 #define TEA6330T_MASTER_VOLUME(xname, xindex) \
67 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
68 .info = snd_tea6330t_info_master_volume, \
69 .get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume }
70
71 static int snd_tea6330t_info_master_volume(struct snd_kcontrol *kcontrol,
72 struct snd_ctl_elem_info *uinfo)
73 {
74 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
75 uinfo->count = 2;
76 uinfo->value.integer.min = 0;
77 uinfo->value.integer.max = 43;
78 return 0;
79 }
80
81 static int snd_tea6330t_get_master_volume(struct snd_kcontrol *kcontrol,
82 struct snd_ctl_elem_value *ucontrol)
83 {
84 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
85
86 snd_i2c_lock(tea->bus);
87 ucontrol->value.integer.value[0] = tea->mleft - 0x14;
88 ucontrol->value.integer.value[1] = tea->mright - 0x14;
89 snd_i2c_unlock(tea->bus);
90 return 0;
91 }
92
93 static int snd_tea6330t_put_master_volume(struct snd_kcontrol *kcontrol,
94 struct snd_ctl_elem_value *ucontrol)
95 {
96 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
97 int change, count, err;
98 unsigned char bytes[3];
99 unsigned char val1, val2;
100
101 val1 = (ucontrol->value.integer.value[0] % 44) + 0x14;
102 val2 = (ucontrol->value.integer.value[1] % 44) + 0x14;
103 snd_i2c_lock(tea->bus);
104 change = val1 != tea->mleft || val2 != tea->mright;
105 tea->mleft = val1;
106 tea->mright = val2;
107 count = 0;
108 if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) {
109 bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT;
110 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft;
111 }
112 if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) {
113 if (count == 0)
114 bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT;
115 bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright;
116 }
117 if (count > 0) {
118 err = snd_i2c_sendbytes(tea->device, bytes, count);
119 if (err < 0)
120 change = err;
121 }
122 snd_i2c_unlock(tea->bus);
123 return change;
124 }
125
126 #define TEA6330T_MASTER_SWITCH(xname, xindex) \
127 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
128 .info = snd_tea6330t_info_master_switch, \
129 .get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch }
130
131 #define snd_tea6330t_info_master_switch snd_ctl_boolean_stereo_info
132
133 static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol,
134 struct snd_ctl_elem_value *ucontrol)
135 {
136 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
137
138 snd_i2c_lock(tea->bus);
139 ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
140 ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
141 snd_i2c_unlock(tea->bus);
142 return 0;
143 }
144
145 static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol,
146 struct snd_ctl_elem_value *ucontrol)
147 {
148 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
149 int change, err;
150 unsigned char bytes[3];
151 unsigned char oval1, oval2, val1, val2;
152
153 val1 = ucontrol->value.integer.value[0] & 1;
154 val2 = ucontrol->value.integer.value[1] & 1;
155 snd_i2c_lock(tea->bus);
156 oval1 = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
157 oval2 = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
158 change = val1 != oval1 || val2 != oval2;
159 tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = val1 ? tea->mleft : 0;
160 tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = val2 ? tea->mright : 0;
161 bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
162 bytes[1] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT];
163 bytes[2] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT];
164 err = snd_i2c_sendbytes(tea->device, bytes, 3);
165 if (err < 0)
166 change = err;
167 snd_i2c_unlock(tea->bus);
168 return change;
169 }
170
171 #define TEA6330T_BASS(xname, xindex) \
172 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
173 .info = snd_tea6330t_info_bass, \
174 .get = snd_tea6330t_get_bass, .put = snd_tea6330t_put_bass }
175
176 static int snd_tea6330t_info_bass(struct snd_kcontrol *kcontrol,
177 struct snd_ctl_elem_info *uinfo)
178 {
179 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
180
181 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
182 uinfo->count = 1;
183 uinfo->value.integer.min = 0;
184 uinfo->value.integer.max = tea->max_bass;
185 return 0;
186 }
187
188 static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol,
189 struct snd_ctl_elem_value *ucontrol)
190 {
191 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
192
193 ucontrol->value.integer.value[0] = tea->bass;
194 return 0;
195 }
196
197 static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol,
198 struct snd_ctl_elem_value *ucontrol)
199 {
200 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
201 int change, err;
202 unsigned char bytes[2];
203 unsigned char val1;
204
205 val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1);
206 snd_i2c_lock(tea->bus);
207 tea->bass = val1;
208 val1 += tea->equalizer ? 7 : 3;
209 change = tea->regs[TEA6330T_SADDR_BASS] != val1;
210 bytes[0] = TEA6330T_SADDR_BASS;
211 bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1;
212 err = snd_i2c_sendbytes(tea->device, bytes, 2);
213 if (err < 0)
214 change = err;
215 snd_i2c_unlock(tea->bus);
216 return change;
217 }
218
219 #define TEA6330T_TREBLE(xname, xindex) \
220 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
221 .info = snd_tea6330t_info_treble, \
222 .get = snd_tea6330t_get_treble, .put = snd_tea6330t_put_treble }
223
224 static int snd_tea6330t_info_treble(struct snd_kcontrol *kcontrol,
225 struct snd_ctl_elem_info *uinfo)
226 {
227 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
228
229 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
230 uinfo->count = 1;
231 uinfo->value.integer.min = 0;
232 uinfo->value.integer.max = tea->max_treble;
233 return 0;
234 }
235
236 static int snd_tea6330t_get_treble(struct snd_kcontrol *kcontrol,
237 struct snd_ctl_elem_value *ucontrol)
238 {
239 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
240
241 ucontrol->value.integer.value[0] = tea->treble;
242 return 0;
243 }
244
245 static int snd_tea6330t_put_treble(struct snd_kcontrol *kcontrol,
246 struct snd_ctl_elem_value *ucontrol)
247 {
248 struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
249 int change, err;
250 unsigned char bytes[2];
251 unsigned char val1;
252
253 val1 = ucontrol->value.integer.value[0] % (tea->max_treble + 1);
254 snd_i2c_lock(tea->bus);
255 tea->treble = val1;
256 val1 += 3;
257 change = tea->regs[TEA6330T_SADDR_TREBLE] != val1;
258 bytes[0] = TEA6330T_SADDR_TREBLE;
259 bytes[1] = tea->regs[TEA6330T_SADDR_TREBLE] = val1;
260 err = snd_i2c_sendbytes(tea->device, bytes, 2);
261 if (err < 0)
262 change = err;
263 snd_i2c_unlock(tea->bus);
264 return change;
265 }
266
267 static const struct snd_kcontrol_new snd_tea6330t_controls[] = {
268 TEA6330T_MASTER_SWITCH("Master Playback Switch", 0),
269 TEA6330T_MASTER_VOLUME("Master Playback Volume", 0),
270 TEA6330T_BASS("Tone Control - Bass", 0),
271 TEA6330T_TREBLE("Tone Control - Treble", 0)
272 };
273
274 static void snd_tea6330_free(struct snd_i2c_device *device)
275 {
276 kfree(device->private_data);
277 }
278
279 int snd_tea6330t_update_mixer(struct snd_card *card,
280 struct snd_i2c_bus *bus,
281 int equalizer, int fader)
282 {
283 struct snd_i2c_device *device;
284 struct tea6330t *tea;
285 const struct snd_kcontrol_new *knew;
286 unsigned int idx;
287 int err;
288 u8 default_treble, default_bass;
289 unsigned char bytes[7];
290
291 tea = kzalloc(sizeof(*tea), GFP_KERNEL);
292 if (tea == NULL)
293 return -ENOMEM;
294 err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device);
295 if (err < 0) {
296 kfree(tea);
297 return err;
298 }
299 tea->device = device;
300 tea->bus = bus;
301 tea->equalizer = equalizer;
302 tea->fader = fader;
303 device->private_data = tea;
304 device->private_free = snd_tea6330_free;
305
306 snd_i2c_lock(bus);
307
308 /* turn fader off and handle equalizer */
309 tea->regs[TEA6330T_SADDR_FADER] = 0x3f;
310 tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN;
311 /* initialize mixer */
312 if (!tea->equalizer) {
313 tea->max_bass = 9;
314 tea->max_treble = 8;
315 default_bass = 3 + 4;
316 tea->bass = 4;
317 default_treble = 3 + 4;
318 tea->treble = 4;
319 } else {
320 tea->max_bass = 5;
321 tea->max_treble = 0;
322 default_bass = 7 + 4;
323 tea->bass = 4;
324 default_treble = 3;
325 tea->treble = 0;
326 }
327 tea->mleft = tea->mright = 0x14;
328 tea->regs[TEA6330T_SADDR_BASS] = default_bass;
329 tea->regs[TEA6330T_SADDR_TREBLE] = default_treble;
330
331 /* compose I2C message and put the hardware to initial state */
332 bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
333 for (idx = 0; idx < 6; idx++)
334 bytes[idx+1] = tea->regs[idx];
335 err = snd_i2c_sendbytes(device, bytes, 7);
336 if (err < 0)
337 goto __error;
338
339 strcat(card->mixername, ",TEA6330T");
340 err = snd_component_add(card, "TEA6330T");
341 if (err < 0)
342 goto __error;
343
344 for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) {
345 knew = &snd_tea6330t_controls[idx];
346 if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble"))
347 continue;
348 err = snd_ctl_add(card, snd_ctl_new1(knew, tea));
349 if (err < 0)
350 goto __error;
351 }
352
353 snd_i2c_unlock(bus);
354 return 0;
355
356 __error:
357 snd_i2c_unlock(bus);
358 snd_i2c_device_free(device);
359 return err;
360 }
361
362 EXPORT_SYMBOL(snd_tea6330t_detect);
363 EXPORT_SYMBOL(snd_tea6330t_update_mixer);
364
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