/*
* For the TDA9875 chip
* (The TDA9875 is used on the Diamond DTV2000 french version
* Other cards probably use these chips as well.)
* This driver will not complain if used with any
* other i2c device with the same address.
*
* Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and
* Eric Sandeen
* This code is placed under the terms of the GNU General Public License
* Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
* Which was based on tda8425.c by Greg Alexander (c) 1998
*
* OPTIONS:
* debug - set to 1 if you'd like to see debug messages
*
* Revision: 0.1 - original version
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/init.h>
#include <media/i2c-addr.h>
static int debug; /* insmod parameter */
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_LICENSE("GPL");
/* Addresses to scan */
static unsigned short normal_i2c[] = {
I2C_ADDR_TDA9875 >> 1,
I2C_CLIENT_END
};
I2C_CLIENT_INSMOD;
/* This is a superset of the TDA9875 */
struct tda9875 {
int rvol, lvol;
int bass, treble;
struct i2c_client c;
};
static struct i2c_driver driver;
static struct i2c_client client_template;
#define dprintk if (debug) printk
/* The TDA9875 is made by Philips Semiconductor
* http://www.semiconductors.philips.com
* TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
*
*/
/* subaddresses for TDA9875 */
#define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/
#define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */
#define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/
#define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/
#define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/
#define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/
#define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/
#define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/
#define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/
#define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/
#define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/
#define TDA9875_MVL 0x1a /* Main volume gauche */
#define TDA9875_MVR 0x1b /* Main volume droite */
#define TDA9875_MBA 0x1d /* Main Basse */
#define TDA9875_MTR 0x1e /* Main treble */
#define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/
#define TDA9875_AVL 0x20 /* Auxilary volume gauche */
#define TDA9875_AVR 0x21 /* Auxilary volume droite */
#define TDA9875_ABA 0x22 /* Auxilary Basse */
#define TDA9875_ATR 0x23 /* Auxilary treble */
#define TDA9875_MSR 0x02 /* Monitor select register */
#define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */
#define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */
#define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */
#define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */
#define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */
#define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */
#define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/
#define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/
#define TDA9875_FMAT 0x0b /* FM Matrix regirter*/
/* values */
#define TDA9875_MUTE_ON 0xff /* general mute */
#define TDA9875_MUTE_OFF 0xcc /* general no mute */
/* Begin code */
static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
{
unsigned char buffer[2];
dprintk("In tda9875_write\n");
dprintk("Writing %d 0x%x\n", subaddr, val);
buffer[0] = subaddr;
buffer[1] = val;
if (2 != i2c_master_send(client,buffer,2)) {
printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
subaddr, val);
return -1;
}
return 0;
}
static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
{
unsigned char write[1];
unsigned char read[1];
struct i2c_msg msgs[2] = {
{ addr, 0, 1, write },
{ addr, I2C_M_RD, 1, read }
};
write[0] = reg;
if (2 != i2c_transfer(adap,msgs,2)) {
printk(KERN_WARNING "tda9875: I/O error (read2)\n");
return -1;
}
dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
return read[0];
}
static void tda9875_set(struct i2c_client *client)
{
struct tda9875 *tda = i2c_get_clientdata(client);
unsigned char a;
dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
tda->lvol,tda->rvol,tda->bass,tda->treble);
a = tda->lvol & 0xff;
tda9875_write(client, TDA9875_MVL, a);
a =tda->rvol & 0xff;
tda9875_write(client, TDA9875_MVR, a);
a =tda->bass & 0xff;
tda9875_write(client, TDA9875_MBA, a);
a =tda->treble & 0xff;
tda9875_write(client, TDA9875_MTR, a);
}
static void do_tda9875_init(struct i2c_client *client)
{
struct tda9875 *t = i2c_get_clientdata(client);
dprintk("In tda9875_init\n");
tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
tda9875_write(client, TDA9875_MSR, 0x03 ); /* Monitor 0b00000XXX*/
tda9875_write(client, TDA9875_C1MSB, 0x00 ); /*Car1(FM) MSB XMHz*/
tda9875_write(client, TDA9875_C1MIB, 0x00 ); /*Car1(FM) MIB XMHz*/
tda9875_write(client, TDA9875_C1LSB, 0x00 ); /*Car1(FM) LSB XMHz*/
tda9875_write(client, TDA9875_C2MSB, 0x00 ); /*Car2(NICAM) MSB XMHz*/
tda9875_write(client, TDA9875_C2MIB, 0x00 ); /*Car2(NICAM) MIB XMHz*/
tda9875_write(client, TDA9875_C2LSB, 0x00 ); /*Car2(NICAM) LSB XMHz*/
tda9875_write(client, TDA9875_DCR, 0x00 ); /*Demod config 0x00*/
tda9875_write(client, TDA9875_DEEM, 0x44 ); /*DE-Emph 0b0100 0100*/
tda9875_write(client, TDA9875_FMAT, 0x00 ); /*FM Matrix reg 0x00*/
tda9875_write(client, TDA9875_SC1, 0x00 ); /* SCART 1 (SC1)*/
tda9875_write(client, TDA9875_SC2, 0x01 ); /* SCART 2 (sc2)*/
tda9875_write(client, TDA9875_CH1V, 0x10 ); /* Channel volume 1 mute*/
tda9875_write(client, TDA9875_CH2V, 0x10 ); /* Channel volume 2 mute */
tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
tda9875_write(client, TDA9875_LOSR, 0x00 ); /* line out (in:mono)*/
tda9875_write(client, TDA9875_AER, 0x00 ); /*06 Effect (AVL+PSEUDO) */
tda9875_write(client, TDA9875_MCS, 0x44 ); /* Main ch select (DAC) */
tda9875_write(client, TDA9875_MVL, 0x03 ); /* Vol Main left 10dB */
tda9875_write(client, TDA9875_MVR, 0x03 ); /* Vol Main right 10dB*/
tda9875_write(client, TDA9875_MBA, 0x00 ); /* Main Bass Main 0dB*/
tda9875_write(client, TDA9875_MTR, 0x00 ); /* Main Treble Main 0dB*/
tda9875_write(client, TDA9875_ACS, 0x44 ); /* Aux chan select (dac)*/
tda9875_write(client, TDA9875_AVL, 0x00 ); /* Vol Aux left 0dB*/
tda9875_write(client, TDA9875_AVR, 0x00 ); /* Vol Aux right 0dB*/
tda9875_write(client, TDA9875_ABA, 0x00 ); /* Aux Bass Main 0dB*/
tda9875_write(client, TDA9875_ATR, 0x00 ); /* Aux Aigus Main 0dB*/
tda9875_write(client, TDA9875_MUT, 0xcc ); /* General mute */
t->lvol=t->rvol =0; /* 0dB */
t->bass=0; /* 0dB */
t->treble=0; /* 0dB */
tda9875_set(client);
}
/* *********************** *
* i2c interface functions *
* *********************** */
static int tda9875_checkit(struct i2c_adapter *adap, int addr)
{
int dic,rev;
dic=i2c_read_register(adap,addr,254);
rev=i2c_read_register(adap,addr,255);
if(dic==0 || dic==2) { // tda9875 and tda9875A
printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
dic==0?"":"A", rev,addr<<1);
return 1;
}
printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
return(0);
}
static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
{
struct tda9875 *t;
struct i2c_client *client;
dprintk("In tda9875_attach\n");
t = kzalloc(sizeof *t,GFP_KERNEL);
if (!t)
return -ENOMEM;
client = &t->c;
memcpy(client,&client_template,sizeof(struct i2c_client));
client->adapter = adap;
client->addr = addr;
i2c_set_clientdata(client, t);
if(!tda9875_checkit(adap,addr)) {
kfree(t);
return 1;
}
do_tda9875_init(client);
printk(KERN_INFO "tda9875: init\n");
i2c_attach_client(client);
return 0;
}
static int tda9875_probe(struct i2c_adapter *adap)
{
if (adap->class & I2C_CLASS_TV_ANALOG)
return i2c_probe(adap, &addr_data, tda9875_attach);
return 0;
}
static int tda9875_detach(struct i2c_client *client)
{
struct tda9875 *t = i2c_get_clientdata(client);
do_tda9875_init(client);
i2c_detach_client(client);
kfree(t);
return 0;
}
static int tda9875_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
struct tda9875 *t = i2c_get_clientdata(client);
dprintk("In tda9875_command...\n");
switch (cmd) {
/* --- v4l ioctls --- */
/* take care: bttv does userspace copying, we'll get a
kernel pointer here... */
case VIDIOCGAUDIO:
{
struct video_audio *va = arg;
int left,right;
dprintk("VIDIOCGAUDIO\n");
va->flags |= VIDEO_AUDIO_VOLUME |
VIDEO_AUDIO_BASS |
VIDEO_AUDIO_TREBLE;
/* min is -84 max is 24 */
left = (t->lvol+84)*606;
right = (t->rvol+84)*606;
va->volume=max(left,right);
va->balance=(32768*min(left,right))/
(va->volume ? va->volume : 1);
va->balance=(left<right)?
(65535-va->balance) : va->balance;
va->bass = (t->bass+12)*2427; /* min -12 max +15 */
va->treble = (t->treble+12)*2730;/* min -12 max +12 */
va->mode |= VIDEO_SOUND_MONO;
break; /* VIDIOCGAUDIO case */
}
case VIDIOCSAUDIO:
{
struct video_audio *va = arg;
int left,right;
dprintk("VIDEOCSAUDIO...\n");
left = (min(65536 - va->balance,32768) *
va->volume) / 32768;
right = (min(va->balance,(__u16)32768) *
va->volume) / 32768;
t->lvol = ((left/606)-84) & 0xff;
if (t->lvol > 24)
t->lvol = 24;
if (t->lvol < -84)
t->lvol = -84 & 0xff;
t->rvol = ((right/606)-84) & 0xff;
if (t->rvol > 24)
t->rvol = 24;
if (t->rvol < -84)
t->rvol = -84 & 0xff;
t->bass = ((va->bass/2400)-12) & 0xff;
if (t->bass > 15)
t->bass = 15;
if (t->bass < -12)
t->bass = -12 & 0xff;
t->treble = ((va->treble/2700)-12) & 0xff;
if (t->treble > 12)
t->treble = 12;
if (t->treble < -12)
t->treble = -12 & 0xff;
//printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
tda9875_set(client);
break;
} /* end of VIDEOCSAUDIO case */
default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
/* nothing */
dprintk("Default\n");
} /* end of (cmd) switch */
return 0;
}
static struct i2c_driver driver = {
.driver = {
.name = "tda9875",
},
.id = I2C_DRIVERID_TDA9875,
.attach_adapter = tda9875_probe,
.detach_client = tda9875_detach,
.command = tda9875_command,
};
static struct i2c_client client_template =
{
.name = "tda9875",
.driver = &driver,
};
static int __init tda9875_init(void)
{
return i2c_add_driver(&driver);
}
static void __exit tda9875_fini(void)
{
i2c_del_driver(&driver);
}
module_init(tda9875_init);
module_exit(tda9875_fini);
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
