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/string.h>
23#include <linux/timer.h>
24#include <linux/delay.h>
25#include <linux/errno.h>
26#include <linux/slab.h>
27#include <linux/videodev.h>
28#include <media/v4l2-common.h>
29#include <linux/i2c.h>
30#include <linux/init.h>
31
32
33#include <media/i2c-addr.h>
34
35static int debug; /* insmod parameter */
36module_param(debug, int, S_IRUGO | S_IWUSR);
37MODULE_LICENSE("GPL");
38
39/* Addresses to scan */
40static unsigned short normal_i2c[] =  {
41    I2C_ADDR_TDA9875 >> 1,
42    I2C_CLIENT_END
43};
44I2C_CLIENT_INSMOD;
45
46/* This is a superset of the TDA9875 */
47struct tda9875 {
48	int rvol, lvol;
49	int bass, treble;
50	struct i2c_client c;
51};
52
53static struct i2c_driver driver;
54static struct i2c_client client_template;
55
56#define dprintk  if (debug) printk
57
58/* The TDA9875 is made by Philips Semiconductor
59 * http://www.semiconductors.philips.com
60 * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
61 *
62 */
63
64		/* subaddresses for TDA9875 */
65#define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
66#define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
67#define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
68#define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
69
70#define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
71#define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
72#define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
73#define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
74
75#define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
76#define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
77#define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
78#define TDA9875_MVL         0x1a  /* Main volume gauche */
79#define TDA9875_MVR         0x1b  /* Main volume droite */
80#define TDA9875_MBA         0x1d  /* Main Basse */
81#define TDA9875_MTR         0x1e  /* Main treble */
82#define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
83#define TDA9875_AVL         0x20  /* Auxilary volume gauche */
84#define TDA9875_AVR         0x21  /* Auxilary volume droite */
85#define TDA9875_ABA         0x22  /* Auxilary Basse */
86#define TDA9875_ATR         0x23  /* Auxilary treble */
87
88#define TDA9875_MSR         0x02  /* Monitor select register */
89#define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
90#define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
91#define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
92#define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
93#define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
94#define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
95#define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
96#define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
97#define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
98
99/* values */
100#define TDA9875_MUTE_ON	    0xff /* general mute */
101#define TDA9875_MUTE_OFF    0xcc /* general no mute */
102
103
104
105/* Begin code */
106
107static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
108{
109	unsigned char buffer[2];
110	dprintk("In tda9875_write\n");
111	dprintk("Writing %d 0x%x\n", subaddr, val);
112	buffer[0] = subaddr;
113	buffer[1] = val;
114	if (2 != i2c_master_send(client,buffer,2)) {
115		printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
116		       subaddr, val);
117		return -1;
118	}
119	return 0;
120}
121
122
123static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
124{
125	unsigned char write[1];
126	unsigned char read[1];
127	struct i2c_msg msgs[2] = {
128		{ addr, 0,        1, write },
129		{ addr, I2C_M_RD, 1, read  }
130	};
131	write[0] = reg;
132
133	if (2 != i2c_transfer(adap,msgs,2)) {
134		printk(KERN_WARNING "tda9875: I/O error (read2)\n");
135		return -1;
136	}
137	dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
138	return read[0];
139}
140
141static void tda9875_set(struct i2c_client *client)
142{
143	struct tda9875 *tda = i2c_get_clientdata(client);
144	unsigned char a;
145
146	dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
147		tda->lvol,tda->rvol,tda->bass,tda->treble);
148
149
150	a = tda->lvol & 0xff;
151	tda9875_write(client, TDA9875_MVL, a);
152	a =tda->rvol & 0xff;
153	tda9875_write(client, TDA9875_MVR, a);
154	a =tda->bass & 0xff;
155	tda9875_write(client, TDA9875_MBA, a);
156	a =tda->treble  & 0xff;
157	tda9875_write(client, TDA9875_MTR, a);
158}
159
160static void do_tda9875_init(struct i2c_client *client)
161{
162	struct tda9875 *t = i2c_get_clientdata(client);
163	dprintk("In tda9875_init\n");
164	tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
165	tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
166	tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
167	tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
168	tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
169	tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
170	tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
171	tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
172	tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
173	tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
174	tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
175	tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
176	tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
177
178	tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
179	tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
180	tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
181	tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
182	tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
183	tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
184	tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
185	tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
186	tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
187	tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
188	tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
189	tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
190	tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
191	tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
192	tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
193	tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
194
195	tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
196
197	t->lvol=t->rvol =0;  	/* 0dB */
198	t->bass=0; 			/* 0dB */
199	t->treble=0;  		/* 0dB */
200	tda9875_set(client);
201
202}
203
204
205/* *********************** *
206 * i2c interface functions *
207 * *********************** */
208
209static int tda9875_checkit(struct i2c_adapter *adap, int addr)
210{
211	int dic,rev;
212
213	dic=i2c_read_register(adap,addr,254);
214	rev=i2c_read_register(adap,addr,255);
215
216	if(dic==0 || dic==2) { // tda9875 and tda9875A
217		printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
218		dic==0?"":"A", rev,addr<<1);
219		return 1;
220	}
221	printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
222	return(0);
223}
224
225static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
226{
227	struct tda9875 *t;
228	struct i2c_client *client;
229	dprintk("In tda9875_attach\n");
230
231	t = kzalloc(sizeof *t,GFP_KERNEL);
232	if (!t)
233		return -ENOMEM;
234
235	client = &t->c;
236	memcpy(client,&client_template,sizeof(struct i2c_client));
237	client->adapter = adap;
238	client->addr = addr;
239	i2c_set_clientdata(client, t);
240
241	if(!tda9875_checkit(adap,addr)) {
242		kfree(t);
243		return 1;
244	}
245
246	do_tda9875_init(client);
247	printk(KERN_INFO "tda9875: init\n");
248
249	i2c_attach_client(client);
250	return 0;
251}
252
253static int tda9875_probe(struct i2c_adapter *adap)
254{
255	if (adap->class & I2C_CLASS_TV_ANALOG)
256		return i2c_probe(adap, &addr_data, tda9875_attach);
257	return 0;
258}
259
260static int tda9875_detach(struct i2c_client *client)
261{
262	struct tda9875 *t  = i2c_get_clientdata(client);
263
264	do_tda9875_init(client);
265	i2c_detach_client(client);
266
267	kfree(t);
268	return 0;
269}
270
271static int tda9875_command(struct i2c_client *client,
272				unsigned int cmd, void *arg)
273{
274	struct tda9875 *t = i2c_get_clientdata(client);
275
276	dprintk("In tda9875_command...\n");
277
278	switch (cmd) {
279	/* --- v4l ioctls --- */
280	/* take care: bttv does userspace copying, we'll get a
281	   kernel pointer here... */
282	case VIDIOCGAUDIO:
283	{
284		struct video_audio *va = arg;
285		int left,right;
286
287		dprintk("VIDIOCGAUDIO\n");
288
289		va->flags |= VIDEO_AUDIO_VOLUME |
290			VIDEO_AUDIO_BASS |
291			VIDEO_AUDIO_TREBLE;
292
293		/* min is -84 max is 24 */
294		left = (t->lvol+84)*606;
295		right = (t->rvol+84)*606;
296		va->volume=max(left,right);
297		va->balance=(32768*min(left,right))/
298			(va->volume ? va->volume : 1);
299		va->balance=(left<right)?
300			(65535-va->balance) : va->balance;
301		va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
302		va->treble = (t->treble+12)*2730;/* min -12 max +12 */
303		va->mode |= VIDEO_SOUND_MONO;
304
305		break; /* VIDIOCGAUDIO case */
306	}
307
308	case VIDIOCSAUDIO:
309	{
310		struct video_audio *va = arg;
311		int left,right;
312
313		dprintk("VIDEOCSAUDIO...\n");
314		left = (min(65536 - va->balance,32768) *
315			va->volume) / 32768;
316		right = (min(va->balance,(__u16)32768) *
317			 va->volume) / 32768;
318		t->lvol = ((left/606)-84) & 0xff;
319		if (t->lvol > 24)
320		 t->lvol = 24;
321		if (t->lvol < -84)
322		 t->lvol = -84 & 0xff;
323
324		t->rvol = ((right/606)-84) & 0xff;
325		if (t->rvol > 24)
326		 t->rvol = 24;
327		if (t->rvol < -84)
328		 t->rvol = -84 & 0xff;
329
330		t->bass = ((va->bass/2400)-12) & 0xff;
331		if (t->bass > 15)
332		 t->bass = 15;
333		if (t->bass < -12)
334		 t->bass = -12 & 0xff;
335
336		t->treble = ((va->treble/2700)-12) & 0xff;
337		if (t->treble > 12)
338		 t->treble = 12;
339		if (t->treble < -12)
340		 t->treble = -12 & 0xff;
341
342
343
344//printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
345
346
347		tda9875_set(client);
348
349		break;
350
351	} /* end of VIDEOCSAUDIO case */
352
353	default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
354
355		/* nothing */
356		dprintk("Default\n");
357
358	} /* end of (cmd) switch */
359
360	return 0;
361}
362
363
364static struct i2c_driver driver = {
365	.driver = {
366		.name   = "tda9875",
367	},
368	.id             = I2C_DRIVERID_TDA9875,
369	.attach_adapter = tda9875_probe,
370	.detach_client  = tda9875_detach,
371	.command        = tda9875_command,
372};
373
374static struct i2c_client client_template =
375{
376	.name      = "tda9875",
377	.driver    = &driver,
378};
379
380static int __init tda9875_init(void)
381{
382	return i2c_add_driver(&driver);
383}
384
385static void __exit tda9875_fini(void)
386{
387	i2c_del_driver(&driver);
388}
389
390module_init(tda9875_init);
391module_exit(tda9875_fini);
392
393/*
394 * Local variables:
395 * c-basic-offset: 8
396 * End:
397 */
398