Root/sound/i2c/tea6330t.c

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)
387

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