/* $OpenBSD: bktr_audio.c,v 1.9 2007/06/11 08:10:22 robert Exp $ */
/* $FreeBSD: src/sys/dev/bktr/bktr_audio.c,v 1.8 2000/10/31 13:09:56 roger Exp $ */
/*
* This is part of the Driver for Video Capture Cards (Frame grabbers)
* and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
* chipset.
* Copyright Roger Hardiman and Amancio Hasty.
*
* bktr_audio : This deals with controlling the audio on TV cards,
* controlling the Audio Multiplexer (audio source selector).
* controlling any MSP34xx stereo audio decoders.
* controlling any DPL35xx dolby surround sound audio decoders.
* initialising TDA98xx audio devices.
*
*/
/*
* 1. Redistributions of source code must retain the
* Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Amancio Hasty and
* Roger Hardiman
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <dev/ic/bt8xx.h> /* OpenBSD location of .h files */
#include <dev/pci/bktr/bktr_reg.h>
#include <dev/pci/bktr/bktr_core.h>
#include <dev/pci/bktr/bktr_tuner.h>
#include <dev/pci/bktr/bktr_card.h>
#include <dev/pci/bktr/bktr_audio.h>
/*
* Prototypes for the GV_BCTV specific functions.
*/
void set_bctv_audio( bktr_ptr_t bktr );
void bctv_gpio_write( bktr_ptr_t bktr, int port, int val );
/*int bctv_gpio_read( bktr_ptr_t bktr, int port );*/ /* Not used */
/*
* init_audio_devices
* Reset any MSP34xx or TDA98xx audio devices.
*/
void init_audio_devices( bktr_ptr_t bktr ) {
/* enable stereo if appropriate on TDA audio chip */
if ( bktr->card.dbx )
init_BTSC( bktr );
/* reset the MSP34xx stereo audio chip */
if ( bktr->card.msp3400c )
msp_dpl_reset( bktr, bktr->msp_addr );
/* reset the DPL35xx dolby audio chip */
if ( bktr->card.dpl3518a )
msp_dpl_reset( bktr, bktr->dpl_addr );
}
/*
*
*/
#define AUDIOMUX_DISCOVER_NOT
int
set_audio( bktr_ptr_t bktr, int cmd )
{
u_int temp;
volatile u_char idx;
#if defined( AUDIOMUX_DISCOVER )
if ( cmd >= 200 )
cmd -= 200;
else
#endif /* AUDIOMUX_DISCOVER */
/* check for existance of audio MUXes */
if ( !bktr->card.audiomuxs[ 4 ] )
return( -1 );
switch (cmd) {
case AUDIO_TUNER:
#ifdef BKTR_REVERSEMUTE
bktr->audio_mux_select = 3;
#else
bktr->audio_mux_select = 0;
#endif
if (bktr->reverse_mute )
bktr->audio_mux_select = 0;
else
bktr->audio_mux_select = 3;
break;
case AUDIO_EXTERN:
bktr->audio_mux_select = 1;
break;
case AUDIO_INTERN:
bktr->audio_mux_select = 2;
break;
case AUDIO_MUTE:
bktr->audio_mute_state = TRUE; /* set mute */
break;
case AUDIO_UNMUTE:
bktr->audio_mute_state = FALSE; /* clear mute */
break;
default:
printf("%s: audio cmd error %02x\n", bktr_name(bktr),
cmd);
return( -1 );
}
/* Most cards have a simple audio multiplexer to select the
* audio source. The I/O_GV card has a more advanced multiplexer
* and requires special handling.
*/
if ( bktr->bt848_card == CARD_IO_GV ) {
set_bctv_audio( bktr );
return( 0 );
}
/* Proceed with the simpler audio multiplexer code for the majority
* of Bt848 cards.
*/
/*
* Leave the upper bits of the GPIO port alone in case they control
* something like the dbx or teletext chips. This doesn't guarantee
* success, but follows the rule of least astonishment.
*/
if ( bktr->audio_mute_state == TRUE ) {
#ifdef BKTR_REVERSEMUTE
idx = 0;
#else
idx = 3;
#endif
if (bktr->reverse_mute )
idx = 3;
else
idx = 0;
}
else
idx = bktr->audio_mux_select;
temp = INL(bktr, BKTR_GPIO_DATA) & ~bktr->card.gpio_mux_bits;
#if defined( AUDIOMUX_DISCOVER )
OUTL(bktr, BKTR_GPIO_DATA, temp | (cmd & 0xff));
printf("%s: cmd: %d audio mux %x temp %x \n", bktr_name(bktr),
cmd, bktr->card.audiomuxs[ idx ], temp );
#else
OUTL(bktr, BKTR_GPIO_DATA, temp | bktr->card.audiomuxs[ idx ]);
#endif /* AUDIOMUX_DISCOVER */
/* Some new Hauppauge cards do not have an audio mux */
/* Instead we use the MSP34xx chip to select TV audio, Line-In */
/* FM Radio and Mute */
/* Examples of this are the Hauppauge 44xxx MSP34xx models */
/* It is ok to drive both the mux and the MSP34xx chip. */
/* If there is no mux, the MSP does the switching of the audio source */
/* If there is a mux, it does the switching of the audio source */
if ((bktr->card.msp3400c) && (bktr->audio_mux_present == 0)) {
if (bktr->audio_mute_state == TRUE ) {
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x0000); /* volume to MUTE */
} else {
if(bktr->audio_mux_select == 0) { /* TV Tuner */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
if (bktr->msp_source_selected != 0) msp_autodetect(bktr); /* setup TV audio mode */
bktr->msp_source_selected = 0;
}
if(bktr->audio_mux_select == 1) { /* Line In */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0000); /* DSP In = SC1_IN_L/R */
bktr->msp_source_selected = 1;
}
if(bktr->audio_mux_select == 2) { /* FM Radio */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0200); /* DSP In = SC2_IN_L/R */
bktr->msp_source_selected = 2;
}
}
}
return( 0 );
}
/*
*
*/
void
temp_mute( bktr_ptr_t bktr, int flag )
{
static int muteState = FALSE;
if ( flag == TRUE ) {
muteState = bktr->audio_mute_state;
set_audio( bktr, AUDIO_MUTE ); /* prevent 'click' */
}
else {
tsleep( BKTR_SLEEP, PZERO, "tuning", hz/8 );
if ( muteState == FALSE )
set_audio( bktr, AUDIO_UNMUTE );
}
}
/* address of BTSC/SAP decoder chip */
#define TDA9850_WADDR 0xb6
#define TDA9850_RADDR 0xb7
/* registers in the TDA9850 BTSC/dbx chip */
#define CON1ADDR 0x04
#define CON2ADDR 0x05
#define CON3ADDR 0x06
#define CON4ADDR 0x07
#define ALI1ADDR 0x08
#define ALI2ADDR 0x09
#define ALI3ADDR 0x0a
/*
* initialise the dbx chip
* taken from the Linux bttv driver TDA9850 initialisation code
*/
void
init_BTSC( bktr_ptr_t bktr )
{
i2cWrite(bktr, TDA9850_WADDR, CON1ADDR, 0x08); /* noise threshold st */
i2cWrite(bktr, TDA9850_WADDR, CON2ADDR, 0x08); /* noise threshold sap */
i2cWrite(bktr, TDA9850_WADDR, CON3ADDR, 0x40); /* stereo mode */
i2cWrite(bktr, TDA9850_WADDR, CON4ADDR, 0x07); /* 0 dB input gain? */
i2cWrite(bktr, TDA9850_WADDR, ALI1ADDR, 0x10); /* wideband alignment? */
i2cWrite(bktr, TDA9850_WADDR, ALI2ADDR, 0x10); /* spectral alignment? */
i2cWrite(bktr, TDA9850_WADDR, ALI3ADDR, 0x03);
}
/*
* setup the dbx chip
* XXX FIXME: alot of work to be done here, this merely unmutes it.
*/
int
set_BTSC( bktr_ptr_t bktr, int control )
{
return( i2cWrite( bktr, TDA9850_WADDR, CON3ADDR, control ) );
}
/*
* CARD_GV_BCTV specific functions.
*/
#define BCTV_AUDIO_MAIN 0x10 /* main audio program */
#define BCTV_AUDIO_SUB 0x20 /* sub audio program */
#define BCTV_AUDIO_BOTH 0x30 /* main(L) + sub(R) program */
#define BCTV_GPIO_REG0 1
#define BCTV_GPIO_REG1 3
#define BCTV_GR0_AUDIO_MODE 3
#define BCTV_GR0_AUDIO_MAIN 0 /* main program */
#define BCTV_GR0_AUDIO_SUB 3 /* sub program */
#define BCTV_GR0_AUDIO_BOTH 1 /* main(L) + sub(R) */
#define BCTV_GR0_AUDIO_MUTE 4 /* audio mute */
#define BCTV_GR0_AUDIO_MONO 8 /* force mono */
void
set_bctv_audio( bktr_ptr_t bktr )
{
int data;
switch (bktr->audio_mux_select) {
case 1: /* external */
case 2: /* internal */
bctv_gpio_write(bktr, BCTV_GPIO_REG1, 0);
break;
default: /* tuner */
bctv_gpio_write(bktr, BCTV_GPIO_REG1, 1);
break;
}
/* switch (bktr->audio_sap_select) { */
switch (BCTV_AUDIO_BOTH) {
case BCTV_AUDIO_SUB:
data = BCTV_GR0_AUDIO_SUB;
break;
case BCTV_AUDIO_BOTH:
data = BCTV_GR0_AUDIO_BOTH;
break;
case BCTV_AUDIO_MAIN:
default:
data = BCTV_GR0_AUDIO_MAIN;
break;
}
if (bktr->audio_mute_state == TRUE)
data |= BCTV_GR0_AUDIO_MUTE;
bctv_gpio_write(bktr, BCTV_GPIO_REG0, data);
return;
}
/* gpio_data bit assignment */
#define BCTV_GPIO_ADDR_MASK 0x000300
#define BCTV_GPIO_WE 0x000400
#define BCTV_GPIO_OE 0x000800
#define BCTV_GPIO_VAL_MASK 0x00f000
#define BCTV_GPIO_PORT_MASK 3
#define BCTV_GPIO_ADDR_SHIFT 8
#define BCTV_GPIO_VAL_SHIFT 12
/* gpio_out_en value for read/write */
#define BCTV_GPIO_OUT_RMASK 0x000f00
#define BCTV_GPIO_OUT_WMASK 0x00ff00
#define BCTV_BITS 100
void
bctv_gpio_write( bktr_ptr_t bktr, int port, int val )
{
u_int data, outbits;
port &= BCTV_GPIO_PORT_MASK;
switch (port) {
case 1:
case 3:
data = ((val << BCTV_GPIO_VAL_SHIFT) & BCTV_GPIO_VAL_MASK) |
((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) |
BCTV_GPIO_WE | BCTV_GPIO_OE;
outbits = BCTV_GPIO_OUT_WMASK;
break;
default:
return;
}
OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
OUTL(bktr, BKTR_GPIO_DATA, data);
OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
DELAY(BCTV_BITS);
OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_WE);
DELAY(BCTV_BITS);
OUTL(bktr, BKTR_GPIO_DATA, data);
DELAY(BCTV_BITS);
OUTL(bktr, BKTR_GPIO_DATA, ~0);
OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
}
/* Not yet used
int
bctv_gpio_read( bktr_ptr_t bktr, int port )
{
u_int data, outbits, ret;
port &= BCTV_GPIO_PORT_MASK;
switch (port) {
case 1:
case 3:
data = ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) |
BCTV_GPIO_WE | BCTV_GPIO_OE;
outbits = BCTV_GPIO_OUT_RMASK;
break;
default:
return( -1 );
}
OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
OUTL(bktr, BKTR_GPIO_DATA, data);
OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
DELAY(BCTV_BITS);
OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_OE);
DELAY(BCTV_BITS);
ret = INL(bktr, BKTR_GPIO_DATA);
DELAY(BCTV_BITS);
OUTL(bktr, BKTR_GPIO_DATA, data);
DELAY(BCTV_BITS);
OUTL(bktr, BKTR_GPIO_DATA, ~0);
OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
return( (ret & BCTV_GPIO_VAL_MASK) >> BCTV_GPIO_VAL_SHIFT );
}
*/
/*
* setup the MSP34xx Stereo Audio Chip
* This uses the Auto Configuration Option on MSP3410D and MSP3415D chips
* and DBX mode selection for MSP3430G chips.
* For MSP3400C support, the full programming sequence is required and is
* not yet supported.
*/
/* Read the MSP version string */
void msp_read_id( bktr_ptr_t bktr ){
int rev1=0, rev2=0;
rev1 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001e);
rev2 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001f);
snprintf(bktr->msp_version_string, sizeof bktr->msp_version_string,
"34%02d%c-%c%d", (rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@',
rev2&0x1f);
}
/* Configure the MSP chip to Auto-detect the audio format.
* For the MSP3430G, we use fast autodetect mode
* For the MSP3410/3415 there are two schemes for this
* a) Fast autodetection - the chip is put into autodetect mode, and the function
* returns immediately. This works in most cases and is the Default Mode.
* b) Slow mode. The function sets the MSP3410/3415 chip, then waits for feedback from
* the chip and re-programs it if needed.
*/
void msp_autodetect( bktr_ptr_t bktr ) {
int auto_detect, loops;
int stereo;
/* MSP3430G - countries with mono and DBX stereo */
if (strncmp("3430G", bktr->msp_version_string, 5) == 0 ||
strncmp("3435G", bktr->msp_version_string, 5) == 0) {
msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0030,0x2003);/* Enable Auto format detection */
msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0020);/* Standard Select Reg. = BTSC-Stereo*/
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000E,0x2403);/* darned if I know */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0320);/* Source select = (St or A) */
/* & Ch. Matrix = St */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
}
/* MSP3415D SPECIAL CASE Use the Tuner's Mono audio output for the MSP */
/* (for Hauppauge 44xxx card with Tuner Type 0x2a) */
else if ( ( (strncmp("3415D", bktr->msp_version_string, 5) == 0)
&&(bktr->msp_use_mono_source == 1)
)
|| (bktr->slow_msp_audio == 2) ){
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0100); /* DSP In = MONO IN */
}
/* MSP3410/MSP3415 - countries with mono, stereo using 2 FM channels and NICAM */
/* FAST sound scheme */
else if (bktr->slow_msp_audio == 0) {
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Spkr Source = default(FM/AM) */
msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
}
/* MSP3410/MSP3415 - European Countries where the fast MSP3410/3415 programming fails */
/* SLOW sound scheme */
else if ( bktr->slow_msp_audio == 1) {
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
/* wait for 0.5s max for terrestrial sound autodetection */
loops = 10;
do {
DELAY(100000);
auto_detect = msp_dpl_read(bktr, bktr->msp_addr, 0x10, 0x007e);
loops++;
} while (auto_detect > 0xff && loops < 50);
if (bootverbose)printf ("%s: Result of autodetect after %dms: %d\n",
bktr_name(bktr), loops*10, auto_detect);
/* Now set the audio baseband processing */
switch (auto_detect) {
case 0: /* no TV sound standard detected */
break;
case 2: /* M Dual FM */
break;
case 3: /* B/G Dual FM; German stereo */
/* Read the stereo detection value from DSP reg 0x0018 */
DELAY(20000);
stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
if (bootverbose)printf ("%s: Stereo reg 0x18 a: %d\n",
bktr_name(bktr), stereo);
DELAY(20000);
stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
if (bootverbose)printf ("%s: Stereo reg 0x18 b: %d\n",
bktr_name(bktr), stereo);
DELAY(20000);
stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
if (bootverbose)printf ("%s: Stereo reg 0x18 c: %d\n",
bktr_name(bktr), stereo);
if (stereo > 0x0100 && stereo < 0x8000) { /* Seems to be stereo */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker set stereo*/
/*
set spatial effect strength to 50% enlargement
set spatial effect mode b, stereo basewidth enlargment only
*/
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f28);
} else if (stereo > 0x8000) { /* bilingual mode */
if (bootverbose) printf ("%s: Bilingual mode detected\n",
bktr_name(bktr));
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Loudspeaker */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x0000);/* all spatial effects off */
} else { /* must be mono */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0030);/* Loudspeaker */
/*
set spatial effect strength to 50% enlargement
set spatial effect mode a, stereo basewidth enlargment
and pseudo stereo effect with automatic high-pass filter
*/
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f08);
}
#if 0
/* The reset value for Channel matrix mode is FM/AM and SOUNDA/LEFT */
/* We would like STEREO instead val: 0x0020 */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0009,0x0020);/* Headphone */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000a,0x0020);/* SCART1 */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0041,0x0020);/* SCART2 */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000b,0x0020);/* I2S */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000c,0x0020);/* Quasi-Peak Detector Source */
msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000e,0x0001);
#endif
break;
case 8: /* B/G FM NICAM */
msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
break;
case 9: /* L_AM NICAM or D/K*/
case 10: /* i-FM NICAM */
break;
default:
if (bootverbose) printf ("%s: Unknown autodetection result value: %d\n",
bktr_name(bktr), auto_detect);
}
}
/* uncomment the following line to enable the MSP34xx 1KHz Tone Generator */
/* turn your speaker volume down low before trying this */
/* msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0014, 0x7f40); */
}
/* Read the DPL version string */
void dpl_read_id( bktr_ptr_t bktr ){
int rev1=0, rev2=0;
rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e);
rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f);
snprintf(bktr->dpl_version_string, sizeof bktr->dpl_version_string,
"34%02d%c-%c%d", ((rev2>>8)&0xff)-1, (rev1&0xff)+'@',
((rev1>>8)&0xff)+'@', rev2&0x1f);
}
/* Configure the DPL chip to Auto-detect the audio format */
void dpl_autodetect( bktr_ptr_t bktr ) {
/* The following are empiric values tried from the DPL35xx data sheet */
msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x000c,0x0320); /* quasi peak detector source dolby
lr 0x03xx; quasi peak detector matrix
stereo 0xXX20 */
msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0040,0x0060); /* Surround decoder mode;
ADAPTIVE/3D-PANORAMA, that means two
speakers and no center speaker, all
channels L/R/C/S mixed to L and R */
msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0041,0x0620); /* surround source matrix;I2S2/STEREO*/
msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0042,0x1F00); /* surround delay 31ms max */
msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0043,0x0000); /* automatic surround input balance */
msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0044,0x4000); /* surround spatial effect 50%
recommended*/
msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0045,0x5400); /* surround panorama effect 66%
recommended with PANORAMA mode
in 0x0040 set to panorama */
}
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