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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / media / video / tda7432.c
blob80f1cee23fa5a70bba5f3afd44faa1be21c3d3b6
1 /*
2 * For the STS-Thompson TDA7432 audio processor chip
3 *
4 * Handles audio functions: volume, balance, tone, loudness
5 * This driver will not complain if used with any
6 * other i2c device with the same address.
7 *
8 * Muting and tone control by Jonathan Isom <jisom@ematic.com>
9 *
10 * Copyright (c) 2000 Eric Sandeen <eric_sandeen@bigfoot.com>
11 * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
12 * This code is placed under the terms of the GNU General Public License
13 * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
14 * Which was based on tda8425.c by Greg Alexander (c) 1998
15 *
16 * OPTIONS:
17 * debug - set to 1 if you'd like to see debug messages
18 * set to 2 if you'd like to be inundated with debug messages
19 *
20 * loudness - set between 0 and 15 for varying degrees of loudness effect
21 *
22 * maxvol - set maximium volume to +20db (1), default is 0db(0)
23 */
24
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/string.h>
29 #include <linux/timer.h>
30 #include <linux/delay.h>
31 #include <linux/errno.h>
32 #include <linux/slab.h>
33 #include <linux/videodev2.h>
34 #include <linux/i2c.h>
35
36 #include <media/v4l2-device.h>
37 #include <media/v4l2-ioctl.h>
38 #include <media/i2c-addr.h>
39 #include <media/v4l2-i2c-drv.h>
40
41 #ifndef VIDEO_AUDIO_BALANCE
42 # define VIDEO_AUDIO_BALANCE 32
43 #endif
44
45 MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>");
46 MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip");
47 MODULE_LICENSE("GPL");
48
49 static int maxvol;
50 static int loudness; /* disable loudness by default */
51 static int debug; /* insmod parameter */
52 module_param(debug, int, S_IRUGO | S_IWUSR);
53 module_param(loudness, int, S_IRUGO);
54 MODULE_PARM_DESC(maxvol,"Set maximium volume to +20db (0), default is 0db(1)");
55 module_param(maxvol, int, S_IRUGO | S_IWUSR);
56
57
58
59 /* Structure of address and subaddresses for the tda7432 */
60
61 struct tda7432 {
62 struct v4l2_subdev sd;
63 int addr;
64 int input;
65 int volume;
66 int muted;
67 int bass, treble;
68 int lf, lr, rf, rr;
69 int loud;
70 };
71
72 static inline struct tda7432 *to_state(struct v4l2_subdev *sd)
73 {
74 return container_of(sd, struct tda7432, sd);
75 }
76
77 /* The TDA7432 is made by STS-Thompson
78 * http://www.st.com
79 * http://us.st.com/stonline/books/pdf/docs/4056.pdf
80 *
81 * TDA7432: I2C-bus controlled basic audio processor
82 *
83 * The TDA7432 controls basic audio functions like volume, balance,
84 * and tone control (including loudness). It also has four channel
85 * output (for front and rear). Since most vidcap cards probably
86 * don't have 4 channel output, this driver will set front & rear
87 * together (no independent control).
88 */
89
90 /* Subaddresses for TDA7432 */
91
92 #define TDA7432_IN 0x00 /* Input select */
93 #define TDA7432_VL 0x01 /* Volume */
94 #define TDA7432_TN 0x02 /* Bass, Treble (Tone) */
95 #define TDA7432_LF 0x03 /* Attenuation LF (Left Front) */
96 #define TDA7432_LR 0x04 /* Attenuation LR (Left Rear) */
97 #define TDA7432_RF 0x05 /* Attenuation RF (Right Front) */
98 #define TDA7432_RR 0x06 /* Attenuation RR (Right Rear) */
99 #define TDA7432_LD 0x07 /* Loudness */
100
101
102 /* Masks for bits in TDA7432 subaddresses */
103
104 /* Many of these not used - just for documentation */
105
106 /* Subaddress 0x00 - Input selection and bass control */
107
108 /* Bits 0,1,2 control input:
109 * 0x00 - Stereo input
110 * 0x02 - Mono input
111 * 0x03 - Mute (Using Attenuators Plays better with modules)
112 * Mono probably isn't used - I'm guessing only the stereo
113 * input is connected on most cards, so we'll set it to stereo.
114 *
115 * Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut
116 * Bit 4 controls bass range: 0/1 is extended/standard bass range
117 *
118 * Highest 3 bits not used
119 */
120
121 #define TDA7432_STEREO_IN 0
122 #define TDA7432_MONO_IN 2 /* Probably won't be used */
123 #define TDA7432_BASS_SYM 1 << 3
124 #define TDA7432_BASS_NORM 1 << 4
125
126 /* Subaddress 0x01 - Volume */
127
128 /* Lower 7 bits control volume from -79dB to +32dB in 1dB steps
129 * Recommended maximum is +20 dB
130 *
131 * +32dB: 0x00
132 * +20dB: 0x0c
133 * 0dB: 0x20
134 * -79dB: 0x6f
135 *
136 * MSB (bit 7) controls loudness: 1/0 is loudness on/off
137 */
138
139 #define TDA7432_VOL_0DB 0x20
140 #define TDA7432_LD_ON 1 << 7
141
142
143 /* Subaddress 0x02 - Tone control */
144
145 /* Bits 0,1,2 control absolute treble gain from 0dB to 14dB
146 * 0x0 is 14dB, 0x7 is 0dB
147 *
148 * Bit 3 controls treble attenuation/gain (sign)
149 * 1 = gain (+)
150 * 0 = attenuation (-)
151 *
152 * Bits 4,5,6 control absolute bass gain from 0dB to 14dB
153 * (This is only true for normal base range, set in 0x00)
154 * 0x0 << 4 is 14dB, 0x7 is 0dB
155 *
156 * Bit 7 controls bass attenuation/gain (sign)
157 * 1 << 7 = gain (+)
158 * 0 << 7 = attenuation (-)
159 *
160 * Example:
161 * 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble
162 */
163
164 #define TDA7432_TREBLE_0DB 0xf
165 #define TDA7432_TREBLE 7
166 #define TDA7432_TREBLE_GAIN 1 << 3
167 #define TDA7432_BASS_0DB 0xf
168 #define TDA7432_BASS 7 << 4
169 #define TDA7432_BASS_GAIN 1 << 7
170
171
172 /* Subaddress 0x03 - Left Front attenuation */
173 /* Subaddress 0x04 - Left Rear attenuation */
174 /* Subaddress 0x05 - Right Front attenuation */
175 /* Subaddress 0x06 - Right Rear attenuation */
176
177 /* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB
178 * in 1.5dB steps.
179 *
180 * 0x00 is 0dB
181 * 0x1f is -37.5dB
182 *
183 * Bit 5 mutes that channel when set (1 = mute, 0 = unmute)
184 * We'll use the mute on the input, though (above)
185 * Bits 6,7 unused
186 */
187
188 #define TDA7432_ATTEN_0DB 0x00
189 #define TDA7432_MUTE 0x1 << 5
190
191
192 /* Subaddress 0x07 - Loudness Control */
193
194 /* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps
195 * when bit 4 is NOT set
196 *
197 * 0x0 is 0dB
198 * 0xf is -15dB
199 *
200 * If bit 4 is set, then there is a flat attenuation according to
201 * the lower 4 bits, as above.
202 *
203 * Bits 5,6,7 unused
204 */
205
206
207
208 /* Begin code */
209
210 static int tda7432_write(struct v4l2_subdev *sd, int subaddr, int val)
211 {
212 struct i2c_client *client = v4l2_get_subdevdata(sd);
213 unsigned char buffer[2];
214
215 v4l2_dbg(2, debug, sd, "In tda7432_write\n");
216 v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
217 buffer[0] = subaddr;
218 buffer[1] = val;
219 if (2 != i2c_master_send(client, buffer, 2)) {
220 v4l2_err(sd, "I/O error, trying (write %d 0x%x)\n",
221 subaddr, val);
222 return -1;
223 }
224 return 0;
225 }
226
227 static int tda7432_set(struct v4l2_subdev *sd)
228 {
229 struct i2c_client *client = v4l2_get_subdevdata(sd);
230 struct tda7432 *t = to_state(sd);
231 unsigned char buf[16];
232
233 v4l2_dbg(1, debug, sd,
234 "tda7432: 7432_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n",
235 t->input, t->volume, t->bass, t->treble, t->lf, t->lr,
236 t->rf, t->rr, t->loud);
237 buf[0] = TDA7432_IN;
238 buf[1] = t->input;
239 buf[2] = t->volume;
240 buf[3] = t->bass;
241 buf[4] = t->treble;
242 buf[5] = t->lf;
243 buf[6] = t->lr;
244 buf[7] = t->rf;
245 buf[8] = t->rr;
246 buf[9] = t->loud;
247 if (10 != i2c_master_send(client, buf, 10)) {
248 v4l2_err(sd, "I/O error, trying tda7432_set\n");
249 return -1;
250 }
251
252 return 0;
253 }
254
255 static void do_tda7432_init(struct v4l2_subdev *sd)
256 {
257 struct tda7432 *t = to_state(sd);
258
259 v4l2_dbg(2, debug, sd, "In tda7432_init\n");
260
261 t->input = TDA7432_STEREO_IN | /* Main (stereo) input */
262 TDA7432_BASS_SYM | /* Symmetric bass cut */
263 TDA7432_BASS_NORM; /* Normal bass range */
264 t->volume = 0x3b ; /* -27dB Volume */
265 if (loudness) /* Turn loudness on? */
266 t->volume |= TDA7432_LD_ON;
267 t->muted = 1;
268 t->treble = TDA7432_TREBLE_0DB; /* 0dB Treble */
269 t->bass = TDA7432_BASS_0DB; /* 0dB Bass */
270 t->lf = TDA7432_ATTEN_0DB; /* 0dB attenuation */
271 t->lr = TDA7432_ATTEN_0DB; /* 0dB attenuation */
272 t->rf = TDA7432_ATTEN_0DB; /* 0dB attenuation */
273 t->rr = TDA7432_ATTEN_0DB; /* 0dB attenuation */
274 t->loud = loudness; /* insmod parameter */
275
276 tda7432_set(sd);
277 }
278
279 static int tda7432_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
280 {
281 struct tda7432 *t = to_state(sd);
282
283 switch (ctrl->id) {
284 case V4L2_CID_AUDIO_MUTE:
285 ctrl->value=t->muted;
286 return 0;
287 case V4L2_CID_AUDIO_VOLUME:
288 if (!maxvol){ /* max +20db */
289 ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 630;
290 } else { /* max 0db */
291 ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 829;
292 }
293 return 0;
294 case V4L2_CID_AUDIO_BALANCE:
295 {
296 if ( (t->lf) < (t->rf) )
297 /* right is attenuated, balance shifted left */
298 ctrl->value = (32768 - 1057*(t->rf));
299 else
300 /* left is attenuated, balance shifted right */
301 ctrl->value = (32768 + 1057*(t->lf));
302 return 0;
303 }
304 case V4L2_CID_AUDIO_BASS:
305 {
306 /* Bass/treble 4 bits each */
307 int bass=t->bass;
308 if(bass >= 0x8)
309 bass = ~(bass - 0x8) & 0xf;
310 ctrl->value = (bass << 12)+(bass << 8)+(bass << 4)+(bass);
311 return 0;
312 }
313 case V4L2_CID_AUDIO_TREBLE:
314 {
315 int treble=t->treble;
316 if(treble >= 0x8)
317 treble = ~(treble - 0x8) & 0xf;
318 ctrl->value = (treble << 12)+(treble << 8)+(treble << 4)+(treble);
319 return 0;
320 }
321 }
322 return -EINVAL;
323 }
324
325 static int tda7432_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
326 {
327 struct tda7432 *t = to_state(sd);
328
329 switch (ctrl->id) {
330 case V4L2_CID_AUDIO_MUTE:
331 t->muted=ctrl->value;
332 break;
333 case V4L2_CID_AUDIO_VOLUME:
334 if(!maxvol){ /* max +20db */
335 t->volume = 0x6f - ((ctrl->value)/630);
336 } else { /* max 0db */
337 t->volume = 0x6f - ((ctrl->value)/829);
338 }
339 if (loudness) /* Turn on the loudness bit */
340 t->volume |= TDA7432_LD_ON;
341
342 tda7432_write(sd, TDA7432_VL, t->volume);
343 return 0;
344 case V4L2_CID_AUDIO_BALANCE:
345 if (ctrl->value < 32768) {
346 /* shifted to left, attenuate right */
347 t->rr = (32768 - ctrl->value)/1057;
348 t->rf = t->rr;
349 t->lr = TDA7432_ATTEN_0DB;
350 t->lf = TDA7432_ATTEN_0DB;
351 } else if(ctrl->value > 32769) {
352 /* shifted to right, attenuate left */
353 t->lf = (ctrl->value - 32768)/1057;
354 t->lr = t->lf;
355 t->rr = TDA7432_ATTEN_0DB;
356 t->rf = TDA7432_ATTEN_0DB;
357 } else {
358 /* centered */
359 t->rr = TDA7432_ATTEN_0DB;
360 t->rf = TDA7432_ATTEN_0DB;
361 t->lf = TDA7432_ATTEN_0DB;
362 t->lr = TDA7432_ATTEN_0DB;
363 }
364 break;
365 case V4L2_CID_AUDIO_BASS:
366 t->bass = ctrl->value >> 12;
367 if(t->bass>= 0x8)
368 t->bass = (~t->bass & 0xf) + 0x8 ;
369
370 tda7432_write(sd, TDA7432_TN, 0x10 | (t->bass << 4) | t->treble);
371 return 0;
372 case V4L2_CID_AUDIO_TREBLE:
373 t->treble= ctrl->value >> 12;
374 if(t->treble>= 0x8)
375 t->treble = (~t->treble & 0xf) + 0x8 ;
376
377 tda7432_write(sd, TDA7432_TN, 0x10 | (t->bass << 4) | t->treble);
378 return 0;
379 default:
380 return -EINVAL;
381 }
382
383 /* Used for both mute and balance changes */
384 if (t->muted)
385 {
386 /* Mute & update balance*/
387 tda7432_write(sd, TDA7432_LF, t->lf | TDA7432_MUTE);
388 tda7432_write(sd, TDA7432_LR, t->lr | TDA7432_MUTE);
389 tda7432_write(sd, TDA7432_RF, t->rf | TDA7432_MUTE);
390 tda7432_write(sd, TDA7432_RR, t->rr | TDA7432_MUTE);
391 } else {
392 tda7432_write(sd, TDA7432_LF, t->lf);
393 tda7432_write(sd, TDA7432_LR, t->lr);
394 tda7432_write(sd, TDA7432_RF, t->rf);
395 tda7432_write(sd, TDA7432_RR, t->rr);
396 }
397 return 0;
398 }
399
400 static int tda7432_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
401 {
402 switch (qc->id) {
403 case V4L2_CID_AUDIO_VOLUME:
404 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880);
405 case V4L2_CID_AUDIO_MUTE:
406 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
407 case V4L2_CID_AUDIO_BALANCE:
408 case V4L2_CID_AUDIO_BASS:
409 case V4L2_CID_AUDIO_TREBLE:
410 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
411 }
412 return -EINVAL;
413 }
414
415 /* ----------------------------------------------------------------------- */
416
417 static const struct v4l2_subdev_core_ops tda7432_core_ops = {
418 .queryctrl = tda7432_queryctrl,
419 .g_ctrl = tda7432_g_ctrl,
420 .s_ctrl = tda7432_s_ctrl,
421 };
422
423 static const struct v4l2_subdev_ops tda7432_ops = {
424 .core = &tda7432_core_ops,
425 };
426
427 /* ----------------------------------------------------------------------- */
428
429 /* *********************** *
430 * i2c interface functions *
431 * *********************** */
432
433 static int tda7432_probe(struct i2c_client *client,
434 const struct i2c_device_id *id)
435 {
436 struct tda7432 *t;
437 struct v4l2_subdev *sd;
438
439 v4l_info(client, "chip found @ 0x%02x (%s)\n",
440 client->addr << 1, client->adapter->name);
441
442 t = kzalloc(sizeof(*t), GFP_KERNEL);
443 if (!t)
444 return -ENOMEM;
445 sd = &t->sd;
446 v4l2_i2c_subdev_init(sd, client, &tda7432_ops);
447 if (loudness < 0 || loudness > 15) {
448 v4l2_warn(sd, "loudness parameter must be between 0 and 15\n");
449 if (loudness < 0)
450 loudness = 0;
451 if (loudness > 15)
452 loudness = 15;
453 }
454
455 do_tda7432_init(sd);
456 return 0;
457 }
458
459 static int tda7432_remove(struct i2c_client *client)
460 {
461 struct v4l2_subdev *sd = i2c_get_clientdata(client);
462
463 do_tda7432_init(sd);
464 v4l2_device_unregister_subdev(sd);
465 kfree(to_state(sd));
466 return 0;
467 }
468
469 static const struct i2c_device_id tda7432_id[] = {
470 { "tda7432", 0 },
471 { }
472 };
473 MODULE_DEVICE_TABLE(i2c, tda7432_id);
474
475 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
476 .name = "tda7432",
477 .probe = tda7432_probe,
478 .remove = tda7432_remove,
479 .id_table = tda7432_id,
480 };
Tomato firmware and modifications.