File: /usr/src/linux/drivers/media/video/tda9875.c
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 * This code is placed under the terms of the GNU General Public License
11 * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
12 * Which was based on tda8425.c by Greg Alexander (c) 1998
13 *
14 * OPTIONS:
15 * debug - set to 1 if you'd like to see debug messages
16 *
17 * Revision: 0.1 - original version
18 */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/sched.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 <linux/i2c.h>
30 #include <linux/i2c-algo-bit.h>
31
32 #include "bttv.h"
33 #include "audiochip.h"
34 #include "id.h"
35
36 MODULE_PARM(debug,"i");
37
38 static int debug = 0; /* insmod parameter */
39
40 /* Addresses to scan */
41 static unsigned short normal_i2c[] = {
42 I2C_TDA9875 >> 1,
43 I2C_CLIENT_END};
44 static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
45 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
46 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
47 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
48 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
49 static unsigned short force[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
50 static struct i2c_client_address_data addr_data = {
51 normal_i2c, normal_i2c_range,
52 probe, probe_range,
53 ignore, ignore_range,
54 force
55 };
56
57 /* This is a superset of the TDA9875 */
58 struct tda9875 {
59 int mode;
60 int rvol, lvol;
61 int bass, treble;
62 struct i2c_client c;
63 };
64
65
66 static struct i2c_driver driver;
67 static struct i2c_client client_template;
68
69 #define dprintk if (debug) printk
70
71 /* The TDA9875 is made by Philips Semiconductor
72 * http://www.semiconductors.philips.com
73 * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
74 *
75 */
76
77 /* subaddresses for TDA9875 */
78 #define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/
79 #define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */
80 #define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/
81 #define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/
82
83 #define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/
84 #define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/
85 #define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/
86 #define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/
87
88 #define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/
89 #define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/
90 #define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/
91 #define TDA9875_MVL 0x1a /* Main volume gauche */
92 #define TDA9875_MVR 0x1b /* Main volume droite */
93 #define TDA9875_MBA 0x1d /* Main Basse */
94 #define TDA9875_MTR 0x1e /* Main treble */
95 #define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/
96 #define TDA9875_AVL 0x20 /* Auxilary volume gauche */
97 #define TDA9875_AVR 0x21 /* Auxilary volume droite */
98 #define TDA9875_ABA 0x22 /* Auxilary Basse */
99 #define TDA9875_ATR 0x23 /* Auxilary treble */
100
101 #define TDA9875_MSR 0x02 /* Monitor select register */
102 #define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */
103 #define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */
104 #define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */
105 #define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */
106 #define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */
107 #define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */
108 #define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/
109 #define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/
110 #define TDA9875_FMAT 0x0b /* FM Matrix regirter*/
111
112 /* values */
113 #define TDA9875_MUTE_ON 0xff /* general mute */
114 #define TDA9875_MUTE_OFF 0xcc /* general no mute */
115
116
117
118 /* Begin code */
119
120 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
121 {
122 unsigned char buffer[2];
123 dprintk("In tda9875_write\n");
124 dprintk("Writing %d 0x%x\n", subaddr, val);
125 buffer[0] = subaddr;
126 buffer[1] = val;
127 if (2 != i2c_master_send(client,buffer,2)) {
128 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
129 subaddr, val);
130 return -1;
131 }
132 return 0;
133 }
134
135 #if 0
136 static int tda9875_read(struct i2c_client *client)
137 {
138 unsigned char buffer;
139 dprintk("In tda9875_read\n");
140 if (1 != i2c_master_recv(client,&buffer,1)) {
141 printk(KERN_WARNING "tda9875: I/O error, trying (read)\n");
142 return -1;
143 }
144 dprintk("Read 0x%02x\n", buffer);
145 return buffer;
146 }
147 #endif
148
149 static void tda9875_set(struct i2c_client *client)
150 {
151 struct tda9875 *tda = client->data;
152 unsigned char a;
153
154 dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",tda->lvol,tda->rvol,tda->bass,tda->treble);
155
156
157 a = tda->lvol & 0xff;
158 tda9875_write(client, TDA9875_MVL, a);
159 a =tda->rvol & 0xff;
160 tda9875_write(client, TDA9875_MVR, a);
161 a =tda->bass & 0xff;
162 tda9875_write(client, TDA9875_MBA, a);
163 a =tda->treble & 0xff;
164 tda9875_write(client, TDA9875_MTR, a);
165 }
166
167 static void do_tda9875_init(struct i2c_client *client)
168 {
169 struct tda9875 *t = client->data;
170 dprintk("In tda9875_init\n");
171 tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
172 tda9875_write(client, TDA9875_MSR, 0x03 ); /* Monitor 0b00000XXX*/
173 tda9875_write(client, TDA9875_C1MSB, 0x00 ); /*Car1(FM) MSB XMHz*/
174 tda9875_write(client, TDA9875_C1MIB, 0x00 ); /*Car1(FM) MIB XMHz*/
175 tda9875_write(client, TDA9875_C1LSB, 0x00 ); /*Car1(FM) LSB XMHz*/
176 tda9875_write(client, TDA9875_C2MSB, 0x00 ); /*Car2(NICAM) MSB XMHz*/
177 tda9875_write(client, TDA9875_C2MIB, 0x00 ); /*Car2(NICAM) MIB XMHz*/
178 tda9875_write(client, TDA9875_C2LSB, 0x00 ); /*Car2(NICAM) LSB XMHz*/
179 tda9875_write(client, TDA9875_DCR, 0x00 ); /*Demod config 0x00*/
180 tda9875_write(client, TDA9875_DEEM, 0x44 ); /*DE-Emph 0b0100 0100*/
181 tda9875_write(client, TDA9875_FMAT, 0x00 ); /*FM Matrix reg 0x00*/
182 tda9875_write(client, TDA9875_SC1, 0x00 ); /* SCART 1 (SC1)*/
183 tda9875_write(client, TDA9875_SC2, 0x01 ); /* SCART 2 (sc2)*/
184
185 tda9875_write(client, TDA9875_CH1V, 0x10 ); /* Channel volume 1 mute*/
186 tda9875_write(client, TDA9875_CH2V, 0x10 ); /* Channel volume 2 mute */
187 tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
188 tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
189 tda9875_write(client, TDA9875_LOSR, 0x00 ); /* line out (in:mono)*/
190 tda9875_write(client, TDA9875_AER, 0x00 ); /*06 Effect (AVL+PSEUDO) */
191 tda9875_write(client, TDA9875_MCS, 0x44 ); /* Main ch select (DAC) */
192 tda9875_write(client, TDA9875_MVL, 0x03 ); /* Vol Main left 10dB */
193 tda9875_write(client, TDA9875_MVR, 0x03 ); /* Vol Main right 10dB*/
194 tda9875_write(client, TDA9875_MBA, 0x00 ); /* Main Bass Main 0dB*/
195 tda9875_write(client, TDA9875_MTR, 0x00 ); /* Main Treble Main 0dB*/
196 tda9875_write(client, TDA9875_ACS, 0x44 ); /* Aux chan select (dac)*/
197 tda9875_write(client, TDA9875_AVL, 0x00 ); /* Vol Aux left 0dB*/
198 tda9875_write(client, TDA9875_AVR, 0x00 ); /* Vol Aux right 0dB*/
199 tda9875_write(client, TDA9875_ABA, 0x00 ); /* Aux Bass Main 0dB*/
200 tda9875_write(client, TDA9875_ATR, 0x00 ); /* Aux Aigus Main 0dB*/
201
202 tda9875_write(client, TDA9875_MUT, 0xcc ); /* General mute */
203
204 t->mode=AUDIO_UNMUTE;
205 t->lvol=t->rvol =0; /* 0dB */
206 t->bass=0; /* 0dB */
207 t->treble=0; /* 0dB */
208 tda9875_set(client);
209
210 }
211
212
213 /* *********************** *
214 * i2c interface functions *
215 * *********************** */
216
217 static int tda9875_attach(struct i2c_adapter *adap, int addr,
218 unsigned short flags, int kind)
219 {
220 struct tda9875 *t;
221 struct i2c_client *client;
222 dprintk("In tda9875_attach\n");
223
224 t = kmalloc(sizeof *t,GFP_KERNEL);
225 if (!t)
226 return -ENOMEM;
227 memset(t,0,sizeof *t);
228
229 client = &t->c;
230 memcpy(client,&client_template,sizeof(struct i2c_client));
231 client->adapter = adap;
232 client->addr = addr;
233 client->data = t;
234
235 do_tda9875_init(client);
236 MOD_INC_USE_COUNT;
237 strcpy(client->name,"TDA9875");
238 printk(KERN_INFO "tda9875: init\n");
239
240 i2c_attach_client(client);
241 return 0;
242 }
243
244 static int tda9875_probe(struct i2c_adapter *adap)
245 {
246 if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
247 return i2c_probe(adap, &addr_data, tda9875_attach);
248 return 0;
249 }
250
251 static int tda9875_detach(struct i2c_client *client)
252 {
253 struct tda9875 *t = client->data;
254
255 do_tda9875_init(client);
256 i2c_detach_client(client);
257
258 kfree(t);
259 MOD_DEC_USE_COUNT;
260 return 0;
261 }
262
263 static int tda9875_command(struct i2c_client *client,
264 unsigned int cmd, void *arg)
265 {
266 struct tda9875 *t = client->data;
267
268 dprintk("In tda9875_command...\n");
269
270 switch (cmd) {
271 /* --- v4l ioctls --- */
272 /* take care: bttv does userspace copying, we'll get a
273 kernel pointer here... */
274 case VIDIOCGAUDIO:
275 {
276 struct video_audio *va = arg;
277 int left,right;
278
279 dprintk("VIDIOCGAUDIO\n");
280
281 va->flags |= VIDEO_AUDIO_VOLUME |
282 VIDEO_AUDIO_BASS |
283 VIDEO_AUDIO_TREBLE;
284
285 /* min is -84 max is 24 */
286 left = (t->lvol+84)*606;
287 right = (t->rvol+84)*606;
288 va->volume=MAX(left,right);
289 va->balance=(32768*MIN(left,right))/
290 (va->volume ? va->volume : 1);
291 va->balance=(left<right)?
292 (65535-va->balance) : va->balance;
293 va->bass = (t->bass+12)*2427; /* min -12 max +15 */
294 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
295
296 va->mode |= VIDEO_SOUND_MONO;
297
298
299 break; /* VIDIOCGAUDIO case */
300 }
301
302 case VIDIOCSAUDIO:
303 {
304 struct video_audio *va = arg;
305 int left,right;
306
307 dprintk("VIDEOCSAUDIO...\n");
308 left = (MIN(65536 - va->balance,32768) *
309 va->volume) / 32768;
310 right = (MIN(va->balance,32768) *
311 va->volume) / 32768;
312 t->lvol = ((left/606)-84) & 0xff;
313 if (t->lvol > 24)
314 t->lvol = 24;
315 if (t->lvol < -84)
316 t->lvol = -84 & 0xff;
317
318 t->rvol = ((right/606)-84) & 0xff;
319 if (t->rvol > 24)
320 t->rvol = 24;
321 if (t->rvol < -84)
322 t->rvol = -84 & 0xff;
323
324 t->bass = ((va->bass/2400)-12) & 0xff;
325 if (t->bass > 15)
326 t->bass = 15;
327 if (t->bass < -12)
328 t->bass = -12 & 0xff;
329
330 t->treble = ((va->treble/2700)-12) & 0xff;
331 if (t->treble > 12)
332 t->treble = 12;
333 if (t->treble < -12)
334 t->treble = -12 & 0xff;
335
336
337
338 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
339
340
341 tda9875_set(client);
342
343 break;
344
345 } /* end of VIDEOCSAUDIO case */
346
347 default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
348
349 /* nothing */
350 dprintk("Default\n");
351
352 } /* end of (cmd) switch */
353
354 return 0;
355 }
356
357
358 static struct i2c_driver driver = {
359 "i2c tda9875 driver",
360 I2C_DRIVERID_TDA9875, /* Get new one for TDA9875 */
361 I2C_DF_NOTIFY,
362 tda9875_probe,
363 tda9875_detach,
364 tda9875_command,
365 };
366
367 static struct i2c_client client_template =
368 {
369 "(unset)", /* name */
370 -1,
371 0,
372 0,
373 NULL,
374 &driver
375 };
376
377 #ifdef MODULE
378 int init_module(void)
379 #else
380 int tda9875_init(void)
381 #endif
382 {
383 i2c_add_driver(&driver);
384 return 0;
385 }
386
387 #ifdef MODULE
388 void cleanup_module(void)
389 {
390 i2c_del_driver(&driver);
391 }
392 #endif
393
394 /*
395 * Local variables:
396 * c-basic-offset: 8
397 * End:
398 */
399
400