xref: /openbmc/linux/sound/i2c/tea6330t.c (revision e868d61272caa648214046a096e5a6bfc068dc8c)
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