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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
30MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
31MODULE_DESCRIPTION("Routines for control of the TEA6330T circuit via i2c bus");
32MODULE_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
48struct 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
60int 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
71static 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
86static 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
96static 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
108static 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
147static 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
159static 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
189static 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
201static 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
210static 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
236static 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
248static 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
257static 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
278static struct snd_kcontrol_new snd_tea6330t_controls[] = {
279TEA6330T_MASTER_SWITCH("Master Playback Switch", 0),
280TEA6330T_MASTER_VOLUME("Master Playback Volume", 0),
281TEA6330T_BASS("Tone Control - Bass", 0),
282TEA6330T_TREBLE("Tone Control - Treble", 0)
283};
284
285static void snd_tea6330_free(struct snd_i2c_device *device)
286{
287 kfree(device->private_data);
288}
289
290int 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
369EXPORT_SYMBOL(snd_tea6330t_detect);
370EXPORT_SYMBOL(snd_tea6330t_update_mixer);
371
372/*
373 * INIT part
374 */
375
376static int __init alsa_tea6330t_init(void)
377{
378 return 0;
379}
380
381static void __exit alsa_tea6330t_exit(void)
382{
383}
384
385module_init(alsa_tea6330t_init)
386module_exit(alsa_tea6330t_exit)