/*
* For the TDA9855 chip (afaik, only the Diamond DTV2000 has this)
* This driver will not complain if used with a TDA9850 or any
* other i2c device with the same address.
*
* Copyright (c) 1999 Steve VanDeBogart (vandebo@uclink.berkeley.edu)
* This code is placed under the terms of the GNU General Public License
* Based on tda8425.c by Greg Alexander (c) 1998
*
* TODO:
* Fix channel change bug - sound goes out when changeing channels, mute
* and unmote to fix.
* Fine tune sound
* Get rest of capabilities into video_audio struct...
*
* Revision: 0.1
*/
#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/malloc.h>
#include <linux/videodev.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include "bttv.h"
#include "audiochip.h"
MODULE_PARM(debug,"i");
static int debug = 0; /* insmod parameter */
/* Addresses to scan */
#define I2C_TDA9855_L 0xb4
#define I2C_TDA9855_H 0xb6
static unsigned short normal_i2c[] = {I2C_CLIENT_END};
static unsigned short normal_i2c_range[] = {
I2C_TDA9855_L >> 1,
I2C_TDA9855_H >> 1,
I2C_CLIENT_END};
static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short force[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static struct i2c_client_address_data addr_data = {
normal_i2c, normal_i2c_range,
probe, probe_range,
ignore, ignore_range,
force
};
struct tda9855 {
int addr;
int rvol, lvol;
int bass, treble, sub;
int c1, c2, c3;
int a1, a2, a3;
};
static struct i2c_driver driver;
static struct i2c_client client_template;
#define dprintk if (debug) printk
/* subaddresses */
#define TDA9855_VR 0x00 /* Volume, right */
#define TDA9855_VL 0x01 /* Volume, left */
#define TDA9855_BA 0x02 /* Bass */
#define TDA9855_TR 0x03 /* Treble */
#define TDA9855_SW 0x04 /* Subwoofer - not connected on DTV2000 */
#define TDA9855_C1 0x05 /* Control 1 */
#define TDA9855_C2 0x06 /* Control 2 */
#define TDA9855_C3 0x07 /* Control 3 */
#define TDA9855_A1 0x08 /* Alignmnet 1*/
#define TDA9855_A2 0x09 /* Alignmnet 2*/
#define TDA9855_A3 0x0a /* Alignmnet 3*/
/* Masks for bits in subaddresses */
/* VR */ /* VL */
/* lower 7 bits control gain from -71dB (0x28) to 16dB (0x7f)
* in 1dB steps - mute is 0x27 */
/* BA */
/* lower 5 bits control bass gain from -12dB (0x06) to 16.5dB (0x19)
* in .5dB steps - 0 is 0x0E */
/* TR */
/* 4 bits << 1 control treble gain from -12dB (0x3) to 12dB (0xb)
* in 3dB steps - 0 is 0x7 */
/* SW */
/* 4 bits << 2 control subwoofer/surraound gain from -14db (0x1) to 14db (0xf)
* in 3dB steps - mute is 0x0 */
/* C1 */
#define TDA9855_MUTE 1<<7 /* GMU, Mute at outputs */
#define TDA9855_AVL 1<<6 /* AVL, Automatic Volume Level */
#define TDA9855_LOUD 1<<5 /* Loudness, 1==off */
#define TDA9855_SUR 1<<3 /* Surround / Subwoofer 1==.5(L-R) 0==.5(L+R) */
/* Bits 0 to 3 select various combinations
* of line in and line out, only the
* interesting ones are defined */
#define TDA9855_EXT 1<<2 /* Selects inputs LIR and LIL. Pins 41 & 12 */
#define TDA9855_INT 0 /* Selects inputs LOR and LOL. (internal) */
/* C2 */
#define TDA9855_SAP 3<<6 /* Selects SAP output, mute if not received */
#define TDA9855_STEREO 1<<6 /* Selects Stereo ouput, mono if not received */
#define TDA9855_MONO 0 /* Forces Mono output */
#define TDA9855_TZCM 1<<5 /* If set, don't mute till zero crossing */
#define TDA9855_VZCM 1<<4 /* If set, don't change volume till zero crossing*/
#define TDA9855_LMU 1<<3 /* Mute at LOR and LOL */
#define TDA9855_LINEAR 0 /* Linear Stereo */
#define TDA9855_PSEUDO 1 /* Pseudo Stereo */
#define TDA9855_SPAT_30 2 /* Spatial Stereo, 30% anti-phase crosstalk */
#define TDA9855_SPAT_50 3 /* Spatial Stereo, 52% anti-phase crosstalk */
#define TDA9855_E_MONO 7 /* Forced mono - mono select elseware, so useless*/
/* C3 */
/* lower 4 bits control input gain from -3.5dB (0x0) to 4dB (0xF)
* in .5dB steps - 0 is 0x7 */
/* A1 and A2 (read/write) */
/* lower 5 bites are wideband and spectral expander alignment
* from 0x00 to 0x1f - nominal at 0x0f and 0x10 (read/write) */
#define TDA9855_STP 1<<5 /* Stereo Pilot/detect (read-only) */
#define TDA9855_SAPP 1<<6 /* SAP Pilot/detect (read-only) */
#define TDA9855_STS 1<<7 /* Stereo trigger 1= <35mV 0= <30mV (write-only)*/
/* A3 */
/* lower 3 bits control timing current for alignment: -30% (0x0), -20% (0x1),
* -10% (0x2), nominal (0x3), +10% (0x6), +20% (0x5), +30% (0x4) */
/* 2 bits << 5 control AVL attack time: 420ohm (0x0), 730ohm (0x2),
* 1200ohm (0x1), 2100ohm (0x3) */
#define TDA9855_ADJ 1<<7 /* Stereo adjust on/off (wideband and spectral) */
/* Begin code */
static int tda9855_write(struct i2c_client *client, int subaddr, int val)
{
unsigned char buffer[2];
buffer[0] = subaddr;
buffer[1] = val;
if (2 != i2c_master_send(client,buffer,2)) {
printk(KERN_WARNING "tda9855: I/O error, trying (write %d 0x%x)\n",
subaddr, val);
return -1;
}
return 0;
}
static int tda9855_read(struct i2c_client *client)
{
unsigned char buffer;
if (1 != i2c_master_recv(client,&buffer,1)) {
printk(KERN_WARNING "tda9855: I/O error, trying (read)\n");
return -1;
}
return buffer;
}
static int tda9855_set(struct i2c_client *client)
{
struct tda9855 *t = client->data;
unsigned char buf[16];
dprintk(KERN_INFO "tda9855_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n",t->rvol,t->lvol,t->bass,t->treble,t->sub,
t->c1,t->c2,t->c3,t->a1,t->a2,t->a3);
buf[0] = TDA9855_VR;
buf[1] = t->rvol;
buf[2] = t->lvol;
buf[3] = t->bass;
buf[4] = t->treble;
buf[5] = t->sub;
buf[6] = t->c1;
buf[7] = t->c2;
buf[8] = t->c3;
buf[9] = t->a1;
buf[10] = t->a2;
buf[11] = t->a3;
if (12 != i2c_master_send(client,buf,12)) {
printk(KERN_WARNING "tda9855: I/O error, trying tda9855_set\n");
return -1;
}
return 0;
}
static void do_tda9855_init(struct i2c_client *client)
{
struct tda9855 *t = client->data;
t->rvol=0x6f; /* 0dB */
t->lvol=0x6f; /* 0dB */
t->bass=0x0e; /* 0dB */
t->treble=(0x07 << 1); /* 0dB */
t->sub=0x8 << 2; /* 0dB */
t->c1=TDA9855_MUTE | TDA9855_AVL | TDA9855_LOUD | TDA9855_INT;
/* Set Mute, AVL, Loudness off, Internal sound */
t->c2=TDA9855_STEREO | TDA9855_LINEAR; /* Set Stereo liner mode */
t->c3=0x07; /* 0dB input gain */
t->a1=0x10; /* Select nominal wideband expander */
t->a2=0x10; /* Select nominal spectral expander and 30mV trigger */
t->a3=0x3; /* Set: nominal timinig current, 420ohm AVL attack */
tda9855_write(client, TDA9855_C1, TDA9855_MUTE); /* mute */
tda9855_set(client);
}
/* *********************** *
* i2c interface functions *
* *********************** */
static int tda9855_attach(struct i2c_adapter *adap, int addr,
unsigned short flags, int kind)
{
struct tda9855 *t;
struct i2c_client *client;
client = kmalloc(sizeof *client,GFP_KERNEL);
if (!client)
return -ENOMEM;
memcpy(client,&client_template,sizeof(struct i2c_client));
client->adapter = adap;
client->addr = addr;
client->data = t = kmalloc(sizeof *t,GFP_KERNEL);
if (!t)
return -ENOMEM;
memset(t,0,sizeof *t);
do_tda9855_init(client);
MOD_INC_USE_COUNT;
strcpy(client->name,"TDA9855");
printk(KERN_INFO "tda9855: init\n");
i2c_attach_client(client);
return 0;
}
static int tda9855_probe(struct i2c_adapter *adap)
{
if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
return i2c_probe(adap, &addr_data, tda9855_attach);
return 0;
}
static int tda9855_detach(struct i2c_client *client)
{
struct tda9855 *t = client->data;
do_tda9855_init(client);
i2c_detach_client(client);
kfree(t);
kfree(client);
MOD_DEC_USE_COUNT;
return 0;
}
static int tda9855_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
struct tda9855 *t = client->data;
#if 0
__u16 *sarg = arg;
#endif
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;
va->flags |= VIDEO_AUDIO_VOLUME |
VIDEO_AUDIO_BASS |
VIDEO_AUDIO_TREBLE;
/* min is 0x27 max is 0x7f, vstep is 2e8 */
left = (t->lvol-0x27)*0x2e8;
right = (t->rvol-0x27)*0x2e8;
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-0x6)*0xccc; /* min 0x6 max is 0x19 */
va->treble = ((t->treble>>1)-0x3)*0x1c71;
va->mode = ((TDA9855_STP | TDA9855_SAPP) &
tda9855_read(client)) >> 4;
va->mode |= VIDEO_SOUND_MONO;
break;
}
case VIDIOCSAUDIO:
{
struct video_audio *va = arg;
int left,right;
left = (MIN(65536 - va->balance,32768) *
va->volume) / 32768;
right = (MIN(va->balance,32768) *
va->volume) / 32768;
t->lvol = left/0x2e8+0x27;
t->rvol = right/0x2e8+0x27;
t->bass = va->bass/0xccc+0x6;
t->treble = (va->treble/0x1c71+0x3)<<1;
tda9855_write(client,TDA9855_VL,t->lvol);
tda9855_write(client,TDA9855_VR,t->rvol);
tda9855_write(client,TDA9855_BA, t->bass);
tda9855_write(client,TDA9855_TR,t->treble);
switch (va->mode) {
case VIDEO_SOUND_MONO:
t->c2= TDA9855_MONO | (t->c2 & 0x3f);
break;
case VIDEO_SOUND_STEREO:
t->c2= TDA9855_STEREO | (t->c2 & 0x3f);
break;
case VIDEO_SOUND_LANG1:
t->c2= TDA9855_SAP | (t->c2 & 0x3f);
break;
}
tda9855_write(client,TDA9855_C2,t->c2);
break;
}
#if 0
/* --- old, obsolete interface --- */
case AUDC_GET_VOLUME_LEFT:
*sarg = (t->lvol-0x27)*0x2e8; /* min is 0x27 max is 0x7f, vstep is 2e8 */
break;
case AUDC_GET_VOLUME_RIGHT:
*sarg = (t->rvol-0x27)*0x2e8;
break;
case AUDC_SET_VOLUME_LEFT:
t->lvol = *sarg/0x2e8+0x27;
break;
case AUDC_SET_VOLUME_RIGHT:
t->rvol = *sarg/0x2e8+0x27;
break;
case AUDC_GET_BASS:
*sarg = (t->bass-0x6)*0xccc; /* min 0x6 max is 0x19 */
break;
case AUDC_SET_BASS:
t->bass = *sarg/0xccc+0x6;
tda9855_write(client,TDA9855_BA, t->bass);
break;
case AUDC_GET_TREBLE:
*sarg = ((t->treble>>1)-0x3)*0x1c71;
break;
case AUDC_SET_TREBLE:
t->treble = (*sarg/0x1c71+0x3)<<1;
tda9855_write(client,TDA9855_TR,t->treble);
break;
case AUDC_GET_STEREO:
*sarg = ((TDA9855_STP | TDA9855_SAPP) &
tda9855_read(client)) >> 4;
if(*sarg==0) *sarg=VIDEO_SOUND_MONO;
break;
case AUDC_SET_STEREO:
if(*sarg==VIDEO_SOUND_MONO)
t->c2= TDA9855_MONO | (t->c2 & 0x3f);
/* Mask out the sap and stereo bits and set mono */
else if(*sarg==VIDEO_SOUND_STEREO)
t->c2= TDA9855_STEREO | (t->c2 & 0x3f);
/* Mask out the sap and stereo bits and set stereo */
else if(*sarg==VIDEO_SOUND_LANG2)
t->c2= TDA9855_SAP | (t->c2 & 0x3f);
/* Mask out the sap and stereo bits and set sap */
tda9855_write(client,TDA9855_C2,t->c2);
break;
case AUDC_SET_INPUT:
dprintk(KERN_INFO "tda9855: SET_INPUT with 0x%04x\n",*sarg);
if((*sarg & (AUDIO_MUTE | AUDIO_OFF))!=0)
t->c1|=TDA9855_MUTE;
else
t->c1= t->c1 & 0x7f; /* won't work --> (~TDA9855_MUTE); */
if((*sarg & AUDIO_INTERN) == AUDIO_INTERN)
t->c1=(t->c1 & ~0x7) | TDA9855_INT; /* 0x7 is a mask for the int/ext */
if((*sarg & AUDIO_EXTERN) == AUDIO_EXTERN)
t->c1=(t->c1 & ~0x7) | TDA9855_EXT; /* 0x7 is a mask for the int/ext */
tda9855_write(client,TDA9855_C1,t->c1);
break;
case AUDC_SWITCH_MUTE:
if((t->c1 & ~TDA9855_MUTE) == 0)
t->c1|=TDA9855_MUTE;
else
t->c1&=~TDA9855_MUTE;
tda9855_write(client,TDA9855_C1,t->c1);
break;
/* TDA9855 unsupported: */
/* case AUDC_NEWCHANNEL:
case AUDC_SET_RADIO:
case AUDC_GET_DC:
*/
#endif
default:
/* nothing */
}
return 0;
}
static struct i2c_driver driver = {
"i2c tda9855 driver",
I2C_DRIVERID_TDA9855,
I2C_DF_NOTIFY,
tda9855_probe,
tda9855_detach,
tda9855_command,
};
static struct i2c_client client_template =
{
"(unset)", /* name */
-1,
0,
0,
NULL,
&driver
};
#ifdef MODULE
int init_module(void)
#else
int tda9855_init(void)
#endif
{
i2c_add_driver(&driver);
return 0;
}
#ifdef MODULE
void cleanup_module(void)
{
i2c_del_driver(&driver);
}
#endif
/*
* Local variables:
* c-basic-offset: 8
* End:
*/