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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / media / video / tda9875.c
blob3c0557130a704ec1084899b18288be3b7a36f514
1 /*
2 * For the TDA9875 chip
3 * (The TDA9875 is used on the Diamond DTV2000 french version
4 * Other cards probably use these chips as well.)
5 * This driver will not complain if used with any
6 * other i2c device with the same address.
7 *
8 * Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and
9 * Eric Sandeen
10 * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
11 * This code is placed under the terms of the GNU General Public License
12 * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
13 * Which was based on tda8425.c by Greg Alexander (c) 1998
14 *
15 * OPTIONS:
16 * debug - set to 1 if you'd like to see debug messages
17 *
18 * Revision: 0.1 - original version
19 */
20
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/string.h>
24 #include <linux/timer.h>
25 #include <linux/delay.h>
26 #include <linux/errno.h>
27 #include <linux/slab.h>
28 #include <linux/videodev.h>
29 #include <media/v4l2-common.h>
30 #include <linux/i2c.h>
31 #include <linux/init.h>
32
33
34 #include <media/i2c-addr.h>
35
36 static int debug; /* insmod parameter */
37 module_param(debug, int, S_IRUGO | S_IWUSR);
38 MODULE_LICENSE("GPL");
39
40 /* Addresses to scan */
41 static unsigned short normal_i2c[] = {
42 I2C_ADDR_TDA9875 >> 1,
43 I2C_CLIENT_END
44 };
45 I2C_CLIENT_INSMOD;
46
47 /* This is a superset of the TDA9875 */
48 struct tda9875 {
49 int rvol, lvol;
50 int bass, treble;
51 struct i2c_client c;
52 };
53
54 static struct i2c_driver driver;
55 static struct i2c_client client_template;
56
57 #define dprintk if (debug) printk
58
59 /* The TDA9875 is made by Philips Semiconductor
60 * http://www.semiconductors.philips.com
61 * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
62 *
63 */
64
65 /* subaddresses for TDA9875 */
66 #define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/
67 #define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */
68 #define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/
69 #define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/
70
71 #define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/
72 #define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/
73 #define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/
74 #define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/
75
76 #define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/
77 #define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/
78 #define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/
79 #define TDA9875_MVL 0x1a /* Main volume gauche */
80 #define TDA9875_MVR 0x1b /* Main volume droite */
81 #define TDA9875_MBA 0x1d /* Main Basse */
82 #define TDA9875_MTR 0x1e /* Main treble */
83 #define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/
84 #define TDA9875_AVL 0x20 /* Auxilary volume gauche */
85 #define TDA9875_AVR 0x21 /* Auxilary volume droite */
86 #define TDA9875_ABA 0x22 /* Auxilary Basse */
87 #define TDA9875_ATR 0x23 /* Auxilary treble */
88
89 #define TDA9875_MSR 0x02 /* Monitor select register */
90 #define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */
91 #define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */
92 #define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */
93 #define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */
94 #define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */
95 #define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */
96 #define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/
97 #define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/
98 #define TDA9875_FMAT 0x0b /* FM Matrix regirter*/
99
100 /* values */
101 #define TDA9875_MUTE_ON 0xff /* general mute */
102 #define TDA9875_MUTE_OFF 0xcc /* general no mute */
103
104
105
106 /* Begin code */
107
108 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
109 {
110 unsigned char buffer[2];
111 dprintk("In tda9875_write\n");
112 dprintk("Writing %d 0x%x\n", subaddr, val);
113 buffer[0] = subaddr;
114 buffer[1] = val;
115 if (2 != i2c_master_send(client,buffer,2)) {
116 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
117 subaddr, val);
118 return -1;
119 }
120 return 0;
121 }
122
123
124 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
125 {
126 unsigned char write[1];
127 unsigned char read[1];
128 struct i2c_msg msgs[2] = {
129 { addr, 0, 1, write },
130 { addr, I2C_M_RD, 1, read }
131 };
132 write[0] = reg;
133
134 if (2 != i2c_transfer(adap,msgs,2)) {
135 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
136 return -1;
137 }
138 dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
139 return read[0];
140 }
141
142 static void tda9875_set(struct i2c_client *client)
143 {
144 struct tda9875 *tda = i2c_get_clientdata(client);
145 unsigned char a;
146
147 dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
148 tda->lvol,tda->rvol,tda->bass,tda->treble);
149
150
151 a = tda->lvol & 0xff;
152 tda9875_write(client, TDA9875_MVL, a);
153 a =tda->rvol & 0xff;
154 tda9875_write(client, TDA9875_MVR, a);
155 a =tda->bass & 0xff;
156 tda9875_write(client, TDA9875_MBA, a);
157 a =tda->treble & 0xff;
158 tda9875_write(client, TDA9875_MTR, a);
159 }
160
161 static void do_tda9875_init(struct i2c_client *client)
162 {
163 struct tda9875 *t = i2c_get_clientdata(client);
164 dprintk("In tda9875_init\n");
165 tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
166 tda9875_write(client, TDA9875_MSR, 0x03 ); /* Monitor 0b00000XXX*/
167 tda9875_write(client, TDA9875_C1MSB, 0x00 ); /*Car1(FM) MSB XMHz*/
168 tda9875_write(client, TDA9875_C1MIB, 0x00 ); /*Car1(FM) MIB XMHz*/
169 tda9875_write(client, TDA9875_C1LSB, 0x00 ); /*Car1(FM) LSB XMHz*/
170 tda9875_write(client, TDA9875_C2MSB, 0x00 ); /*Car2(NICAM) MSB XMHz*/
171 tda9875_write(client, TDA9875_C2MIB, 0x00 ); /*Car2(NICAM) MIB XMHz*/
172 tda9875_write(client, TDA9875_C2LSB, 0x00 ); /*Car2(NICAM) LSB XMHz*/
173 tda9875_write(client, TDA9875_DCR, 0x00 ); /*Demod config 0x00*/
174 tda9875_write(client, TDA9875_DEEM, 0x44 ); /*DE-Emph 0b0100 0100*/
175 tda9875_write(client, TDA9875_FMAT, 0x00 ); /*FM Matrix reg 0x00*/
176 tda9875_write(client, TDA9875_SC1, 0x00 ); /* SCART 1 (SC1)*/
177 tda9875_write(client, TDA9875_SC2, 0x01 ); /* SCART 2 (sc2)*/
178
179 tda9875_write(client, TDA9875_CH1V, 0x10 ); /* Channel volume 1 mute*/
180 tda9875_write(client, TDA9875_CH2V, 0x10 ); /* Channel volume 2 mute */
181 tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
182 tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
183 tda9875_write(client, TDA9875_LOSR, 0x00 ); /* line out (in:mono)*/
184 tda9875_write(client, TDA9875_AER, 0x00 ); /*06 Effect (AVL+PSEUDO) */
185 tda9875_write(client, TDA9875_MCS, 0x44 ); /* Main ch select (DAC) */
186 tda9875_write(client, TDA9875_MVL, 0x03 ); /* Vol Main left 10dB */
187 tda9875_write(client, TDA9875_MVR, 0x03 ); /* Vol Main right 10dB*/
188 tda9875_write(client, TDA9875_MBA, 0x00 ); /* Main Bass Main 0dB*/
189 tda9875_write(client, TDA9875_MTR, 0x00 ); /* Main Treble Main 0dB*/
190 tda9875_write(client, TDA9875_ACS, 0x44 ); /* Aux chan select (dac)*/
191 tda9875_write(client, TDA9875_AVL, 0x00 ); /* Vol Aux left 0dB*/
192 tda9875_write(client, TDA9875_AVR, 0x00 ); /* Vol Aux right 0dB*/
193 tda9875_write(client, TDA9875_ABA, 0x00 ); /* Aux Bass Main 0dB*/
194 tda9875_write(client, TDA9875_ATR, 0x00 ); /* Aux Aigus Main 0dB*/
195
196 tda9875_write(client, TDA9875_MUT, 0xcc ); /* General mute */
197
198 t->lvol=t->rvol =0; /* 0dB */
199 t->bass=0; /* 0dB */
200 t->treble=0; /* 0dB */
201 tda9875_set(client);
202
203 }
204
205
206 /* *********************** *
207 * i2c interface functions *
208 * *********************** */
209
210 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
211 {
212 int dic,rev;
213
214 dic=i2c_read_register(adap,addr,254);
215 rev=i2c_read_register(adap,addr,255);
216
217 if(dic==0 || dic==2) { // tda9875 and tda9875A
218 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
219 dic==0?"":"A", rev,addr<<1);
220 return 1;
221 }
222 printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
223 return(0);
224 }
225
226 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
227 {
228 struct tda9875 *t;
229 struct i2c_client *client;
230 dprintk("In tda9875_attach\n");
231
232 t = kzalloc(sizeof *t,GFP_KERNEL);
233 if (!t)
234 return -ENOMEM;
235
236 client = &t->c;
237 memcpy(client,&client_template,sizeof(struct i2c_client));
238 client->adapter = adap;
239 client->addr = addr;
240 i2c_set_clientdata(client, t);
241
242 if(!tda9875_checkit(adap,addr)) {
243 kfree(t);
244 return 1;
245 }
246
247 do_tda9875_init(client);
248 printk(KERN_INFO "tda9875: init\n");
249
250 i2c_attach_client(client);
251 return 0;
252 }
253
254 static int tda9875_probe(struct i2c_adapter *adap)
255 {
256 if (adap->class & I2C_CLASS_TV_ANALOG)
257 return i2c_probe(adap, &addr_data, tda9875_attach);
258 return 0;
259 }
260
261 static int tda9875_detach(struct i2c_client *client)
262 {
263 struct tda9875 *t = i2c_get_clientdata(client);
264
265 do_tda9875_init(client);
266 i2c_detach_client(client);
267
268 kfree(t);
269 return 0;
270 }
271
272 static int tda9875_get_ctrl(struct i2c_client *client,
273 struct v4l2_control *ctrl)
274 {
275 struct tda9875 *t = i2c_get_clientdata(client);
276
277 switch (ctrl->id) {
278 case V4L2_CID_AUDIO_VOLUME:
279 {
280 int left = (t->lvol+84)*606;
281 int right = (t->rvol+84)*606;
282
283 ctrl->value=max(left,right);
284 return 0;
285 }
286 case V4L2_CID_AUDIO_BALANCE:
287 {
288 int left = (t->lvol+84)*606;
289 int right = (t->rvol+84)*606;
290 int volume = max(left,right);
291 int balance = (32768*min(left,right))/
292 (volume ? volume : 1);
293 ctrl->value=(left<right)?
294 (65535-balance) : balance;
295 return 0;
296 }
297 case V4L2_CID_AUDIO_BASS:
298 ctrl->value = (t->bass+12)*2427; /* min -12 max +15 */
299 return 0;
300 case V4L2_CID_AUDIO_TREBLE:
301 ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */
302 return 0;
303 }
304 return -EINVAL;
305 }
306
307 static int tda9875_set_ctrl(struct i2c_client *client,
308 struct v4l2_control *ctrl)
309 {
310 struct tda9875 *t = i2c_get_clientdata(client);
311 int chvol=0, volume, balance, left, right;
312
313 switch (ctrl->id) {
314 case V4L2_CID_AUDIO_VOLUME:
315 left = (t->lvol+84)*606;
316 right = (t->rvol+84)*606;
317
318 volume = max(left,right);
319 balance = (32768*min(left,right))/
320 (volume ? volume : 1);
321 balance =(left<right)?
322 (65535-balance) : balance;
323
324 volume = ctrl->value;
325
326 chvol=1;
327 break;
328 case V4L2_CID_AUDIO_BALANCE:
329 left = (t->lvol+84)*606;
330 right = (t->rvol+84)*606;
331
332 volume=max(left,right);
333
334 balance = ctrl->value;
335
336 chvol=1;
337 break;
338 case V4L2_CID_AUDIO_BASS:
339 t->bass = ((ctrl->value/2400)-12) & 0xff;
340 if (t->bass > 15)
341 t->bass = 15;
342 if (t->bass < -12)
343 t->bass = -12 & 0xff;
344 break;
345 case V4L2_CID_AUDIO_TREBLE:
346 t->treble = ((ctrl->value/2700)-12) & 0xff;
347 if (t->treble > 12)
348 t->treble = 12;
349 if (t->treble < -12)
350 t->treble = -12 & 0xff;
351 break;
352 default:
353 return -EINVAL;
354 }
355
356 if (chvol) {
357 left = (min(65536 - balance,32768) *
358 volume) / 32768;
359 right = (min(balance,32768) *
360 volume) / 32768;
361 t->lvol = ((left/606)-84) & 0xff;
362 if (t->lvol > 24)
363 t->lvol = 24;
364 if (t->lvol < -84)
365 t->lvol = -84 & 0xff;
366
367 t->rvol = ((right/606)-84) & 0xff;
368 if (t->rvol > 24)
369 t->rvol = 24;
370 if (t->rvol < -84)
371 t->rvol = -84 & 0xff;
372 }
373
374 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
375
376 tda9875_set(client);
377
378 return 0;
379 }
380
381
382 static int tda9875_command(struct i2c_client *client,
383 unsigned int cmd, void *arg)
384 {
385 dprintk("In tda9875_command...\n");
386
387 switch (cmd) {
388 /* --- v4l ioctls --- */
389 /* take care: bttv does userspace copying, we'll get a
390 kernel pointer here... */
391 case VIDIOC_QUERYCTRL:
392 {
393 struct v4l2_queryctrl *qc = arg;
394
395 switch (qc->id) {
396 case V4L2_CID_AUDIO_VOLUME:
397 case V4L2_CID_AUDIO_BASS:
398 case V4L2_CID_AUDIO_TREBLE:
399 default:
400 return -EINVAL;
401 }
402 return v4l2_ctrl_query_fill_std(qc);
403 }
404 case VIDIOC_S_CTRL:
405 return tda9875_set_ctrl(client, arg);
406
407 case VIDIOC_G_CTRL:
408 return tda9875_get_ctrl(client, arg);
409
410 default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
411
412 /* nothing */
413 dprintk("Default\n");
414
415 } /* end of (cmd) switch */
416
417 return 0;
418 }
419
420
421 static struct i2c_driver driver = {
422 .driver = {
423 .name = "tda9875",
424 },
425 .id = I2C_DRIVERID_TDA9875,
426 .attach_adapter = tda9875_probe,
427 .detach_client = tda9875_detach,
428 .command = tda9875_command,
429 };
430
431 static struct i2c_client client_template =
432 {
433 .name = "tda9875",
434 .driver = &driver,
435 };
436
437 static int __init tda9875_init(void)
438 {
439 return i2c_add_driver(&driver);
440 }
441
442 static void __exit tda9875_fini(void)
443 {
444 i2c_del_driver(&driver);
445 }
446
447 module_init(tda9875_init);
448 module_exit(tda9875_fini);
449
450 /*
451 * Local variables:
452 * c-basic-offset: 8
453 * End:
454 */
455
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