Root/
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 | |
30 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.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 | #define snd_tea6330t_info_master_switch snd_ctl_boolean_stereo_info |
146 | |
147 | static 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 | |
159 | static 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 | |
189 | static 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 | |
201 | static 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 | |
210 | static 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 | |
236 | static 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 | |
248 | static 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 | |
257 | static 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 | |
278 | static struct snd_kcontrol_new snd_tea6330t_controls[] = { |
279 | TEA6330T_MASTER_SWITCH("Master Playback Switch", 0), |
280 | TEA6330T_MASTER_VOLUME("Master Playback Volume", 0), |
281 | TEA6330T_BASS("Tone Control - Bass", 0), |
282 | TEA6330T_TREBLE("Tone Control - Treble", 0) |
283 | }; |
284 | |
285 | static void snd_tea6330_free(struct snd_i2c_device *device) |
286 | { |
287 | kfree(device->private_data); |
288 | } |
289 | |
290 | int 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 | |
369 | EXPORT_SYMBOL(snd_tea6330t_detect); |
370 | EXPORT_SYMBOL(snd_tea6330t_update_mixer); |
371 | |
372 | /* |
373 | * INIT part |
374 | */ |
375 | |
376 | static int __init alsa_tea6330t_init(void) |
377 | { |
378 | return 0; |
379 | } |
380 | |
381 | static void __exit alsa_tea6330t_exit(void) |
382 | { |
383 | } |
384 | |
385 | module_init(alsa_tea6330t_init) |
386 | module_exit(alsa_tea6330t_exit) |
387 |
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