/*
* For the TDA9850 and TDA9855 chips
* (The TDA9855 is used on the Diamond DTV2000 and the TDA9850 is used
* on STB cards. 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) 1999 Gerd Knorr
* TDA9850 code and TDA9855.c merger by Eric Sandeen (eric_sandeen@bigfoot.com)
* 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
* - set to 2 if you'd like to be flooded with debug messages
* chip - set to 9850 or 9855 to select your chip (default 9855)
*
* TODO:
* Fix channel change bug - sound goes out when changeing channels, mute
* and unmote to fix. - Is this still here?
* Fine tune sound
* Get rest of capabilities into video_audio struct...
*
* Revision 0.5 - cleaned up debugging messages, added debug level=2
* Revision: 0.4 - check for correct chip= insmod value
* also cleaned up comments a bit
* Revision: 0.3 - took out extraneous tda985x_write in tda985x_command
* Revision: 0.2 - added insmod option chip=
* 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/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");
MODULE_PARM(chip,"i");
MODULE_PARM_DESC(chip, "Type of chip to handle: 9850 or 9855");
static int debug = 0; /* insmod parameter */
static int chip = 9855; /* insmod parameter */
/* Addresses to scan */
#define I2C_TDA985x_L 0xb4
#define I2C_TDA985x_H 0xb6
static unsigned short normal_i2c[] = {I2C_CLIENT_END};
static unsigned short normal_i2c_range[] = {
I2C_TDA985x_L >> 1,
I2C_TDA985x_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
};
/* This is a superset of the TDA9850 and TDA9855 members */
struct tda985x {
int addr;
int rvol, lvol;
int bass, treble, sub;
int c4, c5, c6, c7;
int a1, a2, a3;
};
static struct i2c_driver driver;
static struct i2c_client client_template;
#define dprintk if (debug) printk
#define d2printk if (debug == 2) printk
/* The TDA9850 and TDA9855 are both made by Philips Semiconductor
* http://www.semiconductors.philips.com
* TDA9850: I2C-bus controlled BTSC stereo/SAP decoder
* TDA9855: I2C-bus controlled BTSC stereo/SAP decoder and audio processor
*
* The TDA9850 has more or less a subset of the functions that the TDA9855
* has. As a result, we can re-use many of these defines. Anything with
* TDA9855 is specific to that chip, anything with TDA9850 is specific
* to that chip, and anything with TDA985x is valid for either.
*
* To complicate things further, the TDA9850 uses labels C1 through C4
* for subaddresses 0x04 through 0x07, while the TDA9855 uses
* C1 through C3 for subadresses 0x05 through 0x07 - quite confusing.
* To help keep things straight, I have renamed the various C[1,4] labels
* to C[4,7] so that the numerical label matches the hex value of the
* subaddress for both chips. At least the A[1,3] labels line up. :)
*/
/* subaddresses for TDA9855 */
#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 */
/* subaddresses for TDA9850 */
#define TDA9850_C4 0x04 /* Control 1 for TDA9850 */
/* subaddesses for both chips */
#define TDA985x_C5 0x05 /* Control 2 for TDA9850, Control 1 for TDA9855 */
#define TDA985x_C6 0x06 /* Control 3 for TDA9850, Control 2 for TDA9855 */
#define TDA985x_C7 0x07 /* Control 4 for TDA9850, Control 3 for TDA9855 */
#define TDA985x_A1 0x08 /* Alignment 1 for both chips */
#define TDA985x_A2 0x09 /* Alignment 2 for both chips */
#define TDA985x_A3 0x0a /* Alignment 3 for both chips */
/* Masks for bits in TDA9855 subaddresses */
/* 0x00 - VR in TDA9855 */
/* 0x01 - VL in TDA9855 */
/* lower 7 bits control gain from -71dB (0x28) to 16dB (0x7f)
* in 1dB steps - mute is 0x27 */
/* 0x02 - BA in TDA9855 */
/* lower 5 bits control bass gain from -12dB (0x06) to 16.5dB (0x19)
* in .5dB steps - 0 is 0x0E */
/* 0x03 - TR in TDA9855 */
/* 4 bits << 1 control treble gain from -12dB (0x3) to 12dB (0xb)
* in 3dB steps - 0 is 0x7 */
/* Masks for bits in both chips' subaddresses */
/* 0x04 - SW in TDA9855, C4/Control 1 in TDA9850 */
/* Unique to TDA9855: */
/* 4 bits << 2 control subwoofer/surround gain from -14db (0x1) to 14db (0xf)
* in 3dB steps - mute is 0x0 */
/* Unique to TDA9850: */
/* lower 4 bits control stereo noise threshold, over which stereo turns off
* set to values of 0x00 through 0x0f for Ster1 through Ster16 */
/* 0x05 - C5 - Control 1 in TDA9855 , Control 2 in TDA9850*/
/* Unique to TDA9855: */
#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) */
/* Unique to TDA9850: */
/* lower 4 bits contol SAP noise threshold, over which SAP turns off
* set to values of 0x00 through 0x0f for SAP1 through SAP16 */
/* 0x06 - C6 - Control 2 in TDA9855, Control 3 in TDA9850 */
/* Common to TDA9855 and TDA9850: */
#define TDA985x_SAP 3<<6 /* Selects SAP output, mute if not received */
#define TDA985x_STEREO 1<<6 /* Selects Stereo ouput, mono if not received */
#define TDA985x_MONO 0 /* Forces Mono output */
#define TDA985x_LMU 1<<3 /* Mute (LOR/LOL for 9855, OUTL/OUTR for 9850) */
/* Unique to TDA9855: */
#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_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*/
/* 0x07 - C7 - Control 3 in TDA9855, Control 4 in TDA9850 */
/* Common to both TDA9855 and TDA9850: */
/* lower 4 bits control input gain from -3.5dB (0x0) to 4dB (0xF)
* in .5dB steps - 0dB is 0x7 */
/* 0x08, 0x09 - A1 and A2 (read/write) */
/* Common to both TDA9855 and TDA9850: */
/* lower 5 bites are wideband and spectral expander alignment
* from 0x00 to 0x1f - nominal at 0x0f and 0x10 (read/write) */
#define TDA985x_STP 1<<5 /* Stereo Pilot/detect (read-only) */
#define TDA985x_SAPP 1<<6 /* SAP Pilot/detect (read-only) */
#define TDA985x_STS 1<<7 /* Stereo trigger 1= <35mV 0= <30mV (write-only)*/
/* 0x0a - A3 */
/* Common to both TDA9855 and TDA9850: */
/* lower 3 bits control timing current for alignment: -30% (0x0), -20% (0x1),
* -10% (0x2), nominal (0x3), +10% (0x6), +20% (0x5), +30% (0x4) */
#define TDA985x_ADJ 1<<7 /* Stereo adjust on/off (wideband and spectral */
/* Unique to TDA9855: */
/* 2 bits << 5 control AVL attack time: 420ohm (0x0), 730ohm (0x2),
* 1200ohm (0x1), 2100ohm (0x3) */
/* Begin code */
static int tda985x_write(struct i2c_client *client, int subaddr, int val)
{
unsigned char buffer[2];
d2printk("tda985x: In tda985x_write\n");
dprintk("tda985x: Writing %d 0x%x\n", subaddr, val);
buffer[0] = subaddr;
buffer[1] = val;
if (2 != i2c_master_send(client,buffer,2)) {
printk(KERN_WARNING "tda985x: I/O error, trying (write %d 0x%x)\n",
subaddr, val);
return -1;
}
return 0;
}
static int tda985x_read(struct i2c_client *client)
{
unsigned char buffer;
d2printk("tda985x: In tda985x_read\n");
if (1 != i2c_master_recv(client,&buffer,1)) {
printk(KERN_WARNING "tda985x: I/O error, trying (read)\n");
return -1;
}
dprintk("tda985x: Read 0x%02x\n", buffer);
return buffer;
}
static int tda985x_set(struct i2c_client *client)
{
struct tda985x *t = client->data;
unsigned char buf[16];
d2printk("tda985x: In tda985x_set\n");
if (chip == 9855)
{
dprintk(KERN_INFO
"tda985x: tda985x_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->c5,t->c6,t->c7,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->c5;
buf[7] = t->c6;
buf[8] = t->c7;
buf[9] = t->a1;
buf[10] = t->a2;
buf[11] = t->a3;
if (12 != i2c_master_send(client,buf,12)) {
printk(KERN_WARNING "tda985x: I/O error, trying tda985x_set\n");
return -1;
}
}
else if (chip == 9850)
{
dprintk(KERN_INFO
"tda986x: tda985x_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n",
t->c4,t->c5,t->c6,t->c7,t->a1,t->a2,t->a3);
buf[0] = TDA9850_C4;
buf[1] = t->c4;
buf[2] = t->c5;
buf[3] = t->c6;
buf[4] = t->c7;
buf[5] = t->a1;
buf[6] = t->a2;
buf[7] = t->a3;
if (8 != i2c_master_send(client,buf,8)) {
printk(KERN_WARNING "tda985x: I/O error, trying tda985x_set\n");
return -1;
}
}
return 0;
}
static void do_tda985x_init(struct i2c_client *client)
{
struct tda985x *t = client->data;
d2printk("tda985x: In tda985x_init\n");
if (chip == 9855)
{
printk("tda985x: Using tda9855 options\n");
t->rvol = 0x6f; /* 0dB */
t->lvol = 0x6f; /* 0dB */
t->bass = 0x0e; /* 0dB */
t->treble = (0x07 << 1); /* 0dB */
t->sub = 0x8 << 2; /* 0dB */
t->c5 = TDA9855_MUTE | TDA9855_AVL |
TDA9855_LOUD | TDA9855_INT;
/* Set Mute, AVL, Loudness off, Internal sound */
t->c6 = TDA985x_STEREO | TDA9855_LINEAR |
TDA9855_TZCM | TDA9855_VZCM;
/* Stereo linear mode, also wait til zero crossings */
t->c7 = 0x07; /* 0dB input gain */
}
else if (chip == 9850)
{
printk("tda985x: Using tda9850 options\n");
t->c4 = 0x08; /* Set stereo noise thresh to nominal */
t->c5 = 0x08; /* Set SAP noise threshold to nominal */
t->c6 = TDA985x_STEREO; /* Select Stereo mode for decoder */
t->c7 = 0x07; /* 0dB input gain */
}
/* The following is valid for both chip types */
t->a1 = 0x10; /* Select nominal wideband expander */
t->a2 = 0x10; /* Select nominal spectral expander and 30mV trigger */
t->a3 = 0x3; /* Set: nominal timing current, 420ohm AVL attack */
tda985x_set(client);
}
/* *********************** *
* i2c interface functions *
* *********************** */
static int tda985x_attach(struct i2c_adapter *adap, int addr,
unsigned short flags, int kind)
{
struct tda985x *t;
struct i2c_client *client;
d2printk("tda985x: In tda985x_attach\n");
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_tda985x_init(client);
MOD_INC_USE_COUNT;
strcpy(client->name,"TDA985x");
printk(KERN_INFO "tda985x: init\n");
i2c_attach_client(client);
return 0;
}
static int tda985x_probe(struct i2c_adapter *adap)
{
if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
return i2c_probe(adap, &addr_data, tda985x_attach);
return 0;
}
static int tda985x_detach(struct i2c_client *client)
{
struct tda985x *t = client->data;
do_tda985x_init(client);
i2c_detach_client(client);
kfree(t);
kfree(client);
MOD_DEC_USE_COUNT;
return 0;
}
static int tda985x_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
struct tda985x *t = client->data;
d2printk("tda985x: In tda985x_command\n");
#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;
dprintk("tda985x: VIDIOCGAUDIO\n");
if (chip == 9855)
{
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 0x19 */
va->treble = ((t->treble>>1)-0x3)*0x1c71;
}
/* Valid for both chips: */
{
va->mode = ((TDA985x_STP | TDA985x_SAPP) &
tda985x_read(client)) >> 4;
/* Add mono mode regardless of SAP and stereo */
/* Allows forced mono */
va->mode |= VIDEO_SOUND_MONO;
}
break; /* VIDIOCGAUDIO case */
}
case VIDIOCSAUDIO:
{
struct video_audio *va = arg;
dprintk("tda985x: VIDEOCSAUDIO\n");
if (chip == 9855)
{
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;
tda985x_write(client,TDA9855_VL,t->lvol);
tda985x_write(client,TDA9855_VR,t->rvol);
tda985x_write(client,TDA9855_BA, t->bass);
tda985x_write(client,TDA9855_TR,t->treble);
}
/* The following is valid for both chips */
switch (va->mode) {
case VIDEO_SOUND_MONO:
dprintk("tda985x: VIDEO_SOUND_MONO\n");
t->c6= TDA985x_MONO | (t->c6 & 0x3f);
tda985x_write(client,TDA985x_C6,t->c6);
break;
case VIDEO_SOUND_STEREO:
dprintk("tda985x: VIDEO_SOUND_STEREO\n");
t->c6= TDA985x_STEREO | (t->c6 & 0x3f);
tda985x_write(client,TDA985x_C6,t->c6);
break;
case VIDEO_SOUND_LANG1:
dprintk("tda985x: VIDEO_SOUND_LANG1\n");
t->c6= TDA985x_SAP | (t->c6 & 0x3f);
tda985x_write(client,TDA985x_C6,t->c6);
break;
} /* End of (va->mode) switch */
break;
} /* end of VIDEOCSAUDIO case */
default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
/* nothing */
d2printk("tda985x: Default\n");
} /* end of (cmd) switch */
return 0;
}
static struct i2c_driver driver = {
"i2c tda985x driver",
I2C_DRIVERID_TDA9855, /* Get new one for TDA985x? */
I2C_DF_NOTIFY,
tda985x_probe,
tda985x_detach,
tda985x_command,
};
static struct i2c_client client_template =
{
"(unset)", /* name */
-1,
0,
0,
NULL,
&driver
};
#ifdef MODULE
int init_module(void)
#else
int tda985x_init(void)
#endif
{
if ( (chip != 9850) && (chip != 9855) )
{
printk(KERN_ERR "tda985x: chip parameter must be 9850 or 9855\n");
return -EINVAL;
}
i2c_add_driver(&driver);
return 0;
}
#ifdef MODULE
void cleanup_module(void)
{
i2c_del_driver(&driver);
}
#endif
/*
* Local variables:
* c-basic-offset: 8
* End:
*/