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Linux/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 
 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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