xref: /openbsd/sys/dev/pci/bktr/bktr_card.c (revision 5acd3f3d)

/*	$OpenBSD: bktr_card.c,v 1.16 2022/02/21 12:18:54 jsg Exp $	*/
/* $FreeBSD: src/sys/dev/bktr/bktr_card.c,v 1.16 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_card : This deals with identifying TV cards.
 *		trying to find the card make and model of card.
 *		trying to find the type of tuner fitted.
 *		reading the configuration EEPROM.
 *		locating i2c 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/vnode.h>

#include <dev/ic/bt8xx.h>	/* OpenBSD location for .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>

/* Include the PCI Vendor definitions */
#include <dev/pci/pcidevs.h>
#include <dev/pci/pcireg.h>

/* Various defines */
#define HAUP_REMOTE_INT_WADDR   0x30
#define HAUP_REMOTE_INT_RADDR   0x31

#define HAUP_REMOTE_EXT_WADDR   0x34
#define HAUP_REMOTE_EXT_RADDR   0x35

/* address of BTSC/SAP decoder chip */
#define TDA9850_WADDR		0xb6
#define TDA9850_RADDR		0xb7

/* address of MSP3400C chip */
#define MSP3400C_WADDR		0x80
#define MSP3400C_RADDR		0x81

/* address of DPL3518A chip */
#define DPL3518A_WADDR		0x84
#define DPL3518A_RADDR		0x85

/* EEProm (128 * 8) on an STB card */
#define X24C01_WADDR		0xae
#define X24C01_RADDR		0xaf

/* EEProm (256 * 8) on a Hauppauge card */
/* and on most BT878s cards to store the sub-system vendor id */
#define PFC8582_WADDR		0xa0
#define PFC8582_RADDR		0xa1

#if BKTR_SYSTEM_DEFAULT == BROOKTREE_PAL
#define DEFAULT_TUNER   PHILIPS_PALI
#else
#define DEFAULT_TUNER   PHILIPS_NTSC
#endif




/*
 * the data for each type of card
 *
 * Note:
 *   these entries MUST be kept in the order defined by the CARD_XXX defines!
 */
static const struct CARDTYPE cards[] = {

	{  CARD_UNKNOWN,			/* the card id */
	  "Unknown",				/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx unknown */
	   0,
	   0,
	   0,					/* EEProm unknown */
	   0,					/* EEProm unknown */
	   { 0, 0, 0, 0, 0 },
	   0 },					/* GPIO mask */

	{  CARD_MIRO,				/* the card id */
	  "Pinnacle/Miro TV",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx unknown */
	   0,
	   0,
	   0,					/* EEProm unknown */
	   0,					/* size unknown */
	   { 0x02, 0x01, 0x00, 0x0a, 1 },	/* audio MUX values */
	   0x0f },				/* GPIO mask */

	{  CARD_HAUPPAUGE,			/* the card id */
	  "Hauppauge WinCast/TV",		/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,
	   0,
	   PFC8582_WADDR,			/* EEProm type */
	   (u_char)(256 / EEPROMBLOCKSIZE),	/* 256 bytes */
	   { 0x00, 0x02, 0x01, 0x04, 1 },	/* audio MUX values */
	   0x0f },				/* GPIO mask */

	{  CARD_STB,				/* the card id */
	  "STB TV/PCI",				/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,
	   0,
	   X24C01_WADDR,			/* EEProm type */
	   (u_char)(128 / EEPROMBLOCKSIZE),	/* 128 bytes */
	   { 0x00, 0x01, 0x02, 0x02, 1 }, 	/* audio MUX values */
	   0x0f },				/* GPIO mask */

	{  CARD_INTEL,				/* the card id */
	  "Intel Smart Video III/VideoLogic Captivator PCI", /* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,
	   0,
	   0,
	   0,
	   0,
	   { 0, 0, 0, 0, 0 }, 			/* audio MUX values */
	   0x00 },				/* GPIO mask */

	{  CARD_IMS_TURBO,			/* the card id */
	  "IMS TV Turbo",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,
	   0,
	   PFC8582_WADDR,			/* EEProm type */
	   (u_char)(256 / EEPROMBLOCKSIZE),	/* 256 bytes */
	   { 0x01, 0x02, 0x01, 0x00, 1 },	/* audio MUX values */
	   0x0f },				/* GPIO mask */

	{  CARD_AVER_MEDIA,			/* the card id */
	   "AVer Media TV/FM",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,
	   0,
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x0c, 0x08, 0x04, 0x00, 1 },	/* audio MUX values */
	   0x1f },				/* GPIO mask */

	{  CARD_OSPREY,				/* the card id */
	   "MMAC Osprey",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,
	   0,
	   PFC8582_WADDR,			/* EEProm type */
	   (u_char)(256 / EEPROMBLOCKSIZE),	/* 256 bytes */
	   { 0x00, 0x00, 0x00, 0x00, 0 },	/* audio MUX values */
	   0 },					/* GPIO mask */

	{  CARD_NEC_PK,				/* the card id */
	   "NEC PK-UG-X017",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,
	   0,
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x01, 0x02, 0x01, 0x00, 1 },	/* audio MUX values */
	   0x0f },				/* GPIO mask */

	{  CARD_IO_GV,				/* the card id */
	   "I/O DATA GV-BCTV2/PCI",		/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,
	   0,
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x00, 0x00, 0x00, 0x00, 1 },	/* Has special MUX handler */
	   0x0f },				/* GPIO mask */

	{  CARD_FLYVIDEO,			/* the card id */
	   "FlyVideo",				/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,					/* msp34xx is optional */
	   0,					/* dpl3518a is optional */
	   0xac,				/* EEProm type */
	   (u_char)(256 / EEPROMBLOCKSIZE),	/* 256 bytes */
	   { 0x000, 0x800, 0x400, 0x8dff00, 1 },/* audio MUX values */
	   0x8dff00 },				/* GPIO mask */

	{  CARD_ZOLTRIX,			/* the card id */
	  "Zoltrix",				/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,					/* msp34xx is optional */
	   0,					/* dpl3518a is optional */
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x04, 0x01, 0x00, 0x0a, 1 },	/* audio MUX values */
	   0x0f },				/* GPIO mask */

	{  CARD_KISS,				/* the card id */
	  "KISS TV/FM PCI",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,					/* msp34xx is optional */
	   0,					/* dpl3518a is optional */
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x0c, 0x00, 0x0b, 0x0b, 1 },	/* audio MUX values */
	   0x0f },				/* GPIO mask */

	{  CARD_VIDEO_HIGHWAY_XTREME,		/* the card id */
	  "Video Highway Xtreme",		/* the 'name' */
	  NULL,				/* the tuner */
	   0,
	   0,
	   0,
	   0,
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x00, 0x02, 0x01, 0x04, 1 },	/* audio MUX values */
	   0x0f },				/* GPIO mask */

	{  CARD_ASKEY_DYNALINK_MAGIC_TVIEW,	/* the card id */
	  "Askey/Dynalink Magic TView",		/* the 'name' */
	   NULL,				/* the tuner */
	   0,
	   0,
	   0,
	   0,
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x400, 0xE00, 0x400, 0xC00, 1 },	/* audio MUX values */
	   0xE00 },				/* GPIO mask */

	{  CARD_LEADTEK,			/* the card id */
	  "Leadtek WinFast TV 2000",		/* the 'name' */
	   NULL,				/* the tuner */
	   0,
	   0,
	   0,
	   0,
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   /* Tuner, Extern, Intern, Mute, Enabled */
	   { 0x621000, 0x621000, 0x621000, 0xE21000, 1 }, /* audio MUX values */
	   0xfff000 },				/* GPIO mask */

	{  CARD_TERRATVPLUS,			/* the card id */
	   "TerraTVplus",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,
	   0,
	   0,
	   0,
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x20000, 0x00000, 0x30000, 0x40000, 1 }, /* audio MUX values*/
	   0x70000 },				/* GPIO mask */

	{  CARD_TVWONDER,			/* the card id */
	   "ATI TV-Wonder/VE",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,
	   0,
	   0,
	   0,
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x1002, 0x1002, 0x3003, 0x3003, 0x3003 },	/* audio MUX values*/
	   0x300f },				/* GPIO mask */

	{  CARD_IO_BCTV3,			/* the card id */
	  "I/O DATA GV-BCTV3/PCI",		/* the 'name' */
	  NULL,					/* the tuner */
	  0,					/* the tuner i2c address */
	  0,					/* dbx is optional */
	  0,
	  0,
	  0,					/* EEProm type */
	  0,					/* EEProm size */
	   /* Tuner, Extern, Intern, Mute, Enabled */
	   { 0x10000, 0, 0x10000, 0, 1 },	/* audio MUX values */
	   0x10f00 },				/* GPIO mask */

	{  CARD_AOPEN_VA1000,			/* the card id */
	  "AOpen VA1000",			/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,
	   0,
	   0,					/* EEProm unknown */
	   0,					/* size unknown */
	   { 0x02, 0x00, 0x00, 0x00, 1 },	/* audio MUX values */
	   0x18e0 },				/* GPIO mask */

	{  CARD_ZOLTRIX_GENIE_FM,		/* the card id */
	   "Zoltrix Genie TV/FM",		/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,					/* msp34xx is optional */
	   0,					/* dpl3518a is optional */
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0xbc803f, 0xbcb03f, 0xbc903f, 0x0, 1 },	/* audio MUX values*/
	   0xbcf03f },				/* GPIO mask */

	{  CARD_LEADTEK_XP,			/* the card id */
	   "Leadtek WinFast TV 2000 XP",	/* the 'name' */
	   NULL,				/* the tuner */
	   0,					/* the tuner i2c address */
	   0,					/* dbx is optional */
	   0,					/* msp34xx is optional */
	   0,					/* dpl3518a is optional */
	   0,					/* EEProm type */
	   0,					/* EEProm size */
	   { 0x122000, 0x1000, 0x620000, 0x0, 1 },	/* audio MUX values*/
	   0xb3300 },				/* GPIO mask */
};

struct bt848_card_sig bt848_card_signature[1]= {
  /* IMS TURBO TV : card 5 */
    {  5,9, {00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 02, 00, 00, 00}}
};


/*
 * Write to the configuration EEPROM on the card.
 * This is dangerous and will mess up your card. Therefore it is not
 * implemented.
 */
int
writeEEProm( bktr_ptr_t bktr, int offset, int count, u_char *data )
{
	return( -1 );
}

/*
 * Read the contents of the configuration EEPROM on the card.
 * (This is not fitted to all makes of card. All Hauppauge cards have them
 * and so do newer Bt878 based cards.
 */
int
readEEProm(bktr_ptr_t bktr, int offset, int count, u_char *data)
{
	int	x;
	int	addr;
	int	max;
	int	byte;

	/* get the address of the EEProm */
	addr = (int)(bktr->card.eepromAddr & 0xff);
	if ( addr == 0 )
		return( -1 );

	max = (int)(bktr->card.eepromSize * EEPROMBLOCKSIZE);
	if ( (offset + count) > max )
		return( -1 );

	/* set the start address */
	if ( i2cWrite( bktr, addr, offset, -1 ) == -1 )
		return( -1 );

	/* the read cycle */
	for ( x = 0; x < count; ++x ) {
		if ( (byte = i2cRead( bktr, (addr | 1) )) == -1 )
			return( -1 );
		data[ x ] = byte;
	}

	return( 0 );
}


#define ABSENT		(-1)

/*
 * get a signature of the card
 * read all 128 possible i2c read addresses from 0x01 thru 0xff
 * build a bit array with a 1 bit for each i2c device that responds
 *
 * XXX FIXME: use offset & count args
 */
int
signCard( bktr_ptr_t bktr, int offset, int count, u_char *sig )
{
	int	x;

	for ( x = 0; x < 16; ++x )
		sig[ x ] = 0;

	for ( x = 0; x < count; ++x ) {
		if ( i2cRead( bktr, (2 * x) + 1 ) != ABSENT ) {
			sig[ x / 8 ] |= (1 << (x % 8) );
		}
	}

	return( 0 );
}


/*
 * check_for_i2c_devices.
 * Some BT848 cards have no tuner and no additional i2c devices
 * eg stereo decoder. These are used for video conferencing or capture from
 * a video camera. (eg VideoLogic Captivator PCI, Intel SmartCapture card).
 *
 * Determine if there are any i2c devices present. There are none present if
 *  a) reading from all 128 devices returns ABSENT (-1) for each one
 *     (eg VideoLogic Captivator PCI with BT848)
 *  b) reading from all 128 devices returns 0 for each one
 *     (eg VideoLogic Captivator PCI rev. 2F with BT848A)
 */
static int check_for_i2c_devices( bktr_ptr_t bktr ){
  int x, temp_read;
  int i2c_all_0 = 1;
  int i2c_all_absent = 1;
  for ( x = 0; x < 128; ++x ) {
    temp_read = i2cRead( bktr, (2 * x) + 1 );
    if (temp_read != 0)      i2c_all_0 = 0;
    if (temp_read != ABSENT) i2c_all_absent = 0;
  }

  if ((i2c_all_0) || (i2c_all_absent)) return 0;
  else return 1;
}


/*
 * Temic/Philips datasheets say tuners can be at i2c addresses 0xc0, 0xc2,
 * 0xc4 or 0xc6, settable by links on the tuner.
 * Determine the actual address used on the TV card by probing read addresses.
 */
static int locate_tuner_address( bktr_ptr_t bktr) {
  if (i2cRead( bktr, 0xc1) != ABSENT) return 0xc0;
  if (i2cRead( bktr, 0xc3) != ABSENT) return 0xc2;
  if (i2cRead( bktr, 0xc5) != ABSENT) return 0xc4;
  if (i2cRead( bktr, 0xc7) != ABSENT) return 0xc6;
  return -1; /* no tuner found */
}


/*
 * Search for a configuration EEPROM on the i2c bus by looking at i2c addresses
 * where EEPROMs are usually found.
 * On some cards, the EEPROM appears in several locations, but all in the
 * range 0xa0 to 0xae.
 */
static int locate_eeprom_address( bktr_ptr_t bktr) {
  if (i2cRead(bktr, 0xa0) != ABSENT) return 0xa0;
  if (i2cRead(bktr, 0xac) != ABSENT) return 0xac;
  if (i2cRead(bktr, 0xae) != ABSENT) return 0xae;
  return -1; /* no eeprom found */
}


/*
 * determine the card brand/model
 * BKTR_OVERRIDE_CARD, BKTR_OVERRIDE_TUNER, BKTR_OVERRIDE_DBX and
 * BKTR_OVERRIDE_MSP can be used to select a specific device,
 * regardless of the autodetection and i2c device checks.
 *
 * The scheme used for probing cards faces these problems:
 *  It is impossible to work out which type of tuner is actually fitted,
 *  (the driver cannot tell if the Tuner is PAL or NTSC, Temic or Philips)
 *  It is impossible to determine what audio-mux hardware is connected.
 *  It is impossible to determine if there is extra hardware connected to the
 *  GPIO pins  (eg radio chips or MSP34xx reset logic)
 *
 * However some makes of card (eg Hauppauge) come with a configuration eeprom
 * which tells us the make of the card. Most eeproms also tell us the
 * tuner type and other features of the cards.
 *
 * The current probe code works as follows
 * A) If the card uses a Bt878/879:
 *   1) Read the sub-system vendor id from the configuration EEPROM.
 *      Select the required tuner, audio mux arrangement and any other
 *      onboard features. If this fails, move to step B.
 * B) If it card uses a Bt848, 848A, 849A or an unknown Bt878/879:
 *   1) Look for I2C devices. If there are none fitted, it is an Intel or
 *      VideoLogic cards.
 *   2) Look for a configuration EEPROM.
 *   2a) If there is one at I2C address 0xa0 it may be
 *       a Hauppauge or an Osprey. Check the EEPROM contents to determine which
 *       one it is. For Hauppauge, select the tuner type and audio hardware.
 *   2b) If there is an EEPROM at I2C address 0xa8 it will be an STB card.
 *       We still have to guess on the tuner type.
 *
 * C) If we do not know the card type from (A) or (B), guess at the tuner
 *    type based on the I2C address of the tuner.
 *
 * D) After determining the Tuner Type, we probe the i2c bus for other
 *    devices at known locations, eg IR-Remote Control, MSP34xx and TDA
 *    stereo chips.
 */


/*
 * These are the sub-system vendor ID codes stored in the
 * configuration EEPROM used on Bt878/879 cards. They should match the
 * number assigned to the company by the PCI Special Interest Group
 */
/* Following not confirmed with http://members.hyperlink.net.au/~chart,
   so not added to OpenBSD's pcidevs */
#define PCI_VENDOR_LEADTEK_ALT	0x6606	/* this is swapped w/ prod id */
#define PCI_VENDOR_LEADTEK_ALT_2        0x6607
#define PCI_VENDOR_LEADTEK_ALT_3        0x107d
#define PCI_VENDOR_FLYVIDEO	0x1851
#define PCI_VENDOR_FLYVIDEO_2	0x1852
#define PCI_VENDOR_PINNACLE_ALT	0xBD11	/* this is swapped w/ prod id */

void
probeCard( bktr_ptr_t bktr, int verbose, int unit )
{
	int		card, i,j, card_found;
	int		status;
	u_char 		probe_signature[128], *probe_temp;
	int		any_i2c_devices;
	u_char 		eeprom[256];
	int 		tuner_i2c_address = -1;
	int 		eeprom_i2c_address = -1;

	/* Select all GPIO bits as inputs */
	OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
	if (bootverbose)
	    printf("%s: GPIO is 0x%08x\n", bktr_name(bktr),
		   INL(bktr, BKTR_GPIO_DATA));

#ifdef HAUPPAUGE_MSP_RESET
	/* Reset the MSP34xx audio chip. This resolves bootup card
	 * detection problems with old Bt848 based Hauppauge cards with
	 * MSP34xx stereo audio chips. This must be user enabled because
	 * at this point the probe function does not know the card type. */
	OUTL(bktr, BKTR_GPIO_OUT_EN, INL(bktr, BKTR_GPIO_OUT_EN) | (1<<5));
	OUTL(bktr, BKTR_GPIO_DATA, INL(bktr, BKTR_GPIO_DATA) | (1<<5));  /* write '1' */
	DELAY(2500); /* wait 2.5ms */
	OUTL(bktr, BKTR_GPIO_DATA, INL(bktr, BKTR_GPIO_DATA) & ~(1<<5)); /* write '0' */
	DELAY(2500); /* wait 2.5ms */
	OUTL(bktr, BKTR_GPIO_DATA, INL(bktr, BKTR_GPIO_DATA) | (1<<5));  /* write '1' */
	DELAY(2500); /* wait 2.5ms */
#endif

	/* Check for the presence of i2c devices */
	any_i2c_devices = check_for_i2c_devices( bktr );


	/* Check for a user specified override on the card selection */
#if defined( BKTR_OVERRIDE_CARD )
	bktr->card = cards[ (card = BKTR_OVERRIDE_CARD) ];
	goto checkEEPROM;
#endif
	if (bktr->bt848_card != -1 ) {
	  bktr->card = cards[ (card = bktr->bt848_card) ];
	  goto checkEEPROM;
	}


	/* No override, so try and determine the make of the card */

	/* On BT878/879 cards, read the sub-system vendor id */
	/* This identifies the manufacturer of the card and the model */
	/* In theory this can be read from PCI registers but this does not */
	/* appear to work on the FlyVideo 98. Hauppauge also warned that */
	/* the PCI registers are sometimes not loaded correctly. */
	/* Therefore, I will read the sub-system vendor ID from the EEPROM */
	/* (just like the Bt878 does during power up initialisation) */

	if ((bktr->id==BROOKTREE_878) || (bktr->id==BROOKTREE_879)) {
	    /* Try and locate the EEPROM */
	    eeprom_i2c_address = locate_eeprom_address( bktr );
	    if (eeprom_i2c_address != -1) {

		unsigned int subsystem_vendor_id; /* vendors PCI-SIG ID */
		unsigned int subsystem_id;        /* board model number */
		unsigned int byte_252, byte_253, byte_254, byte_255;

		bktr->card = cards[ (card = CARD_UNKNOWN) ];
		bktr->card.eepromAddr = eeprom_i2c_address;
		bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);

	        if (readEEProm(bktr, 0, 256, eeprom) && bootverbose)
			printf("%s: error reading EEPROM\n", bktr_name(bktr));
		byte_252 = (unsigned int)eeprom[252];
		byte_253 = (unsigned int)eeprom[253];
		byte_254 = (unsigned int)eeprom[254];
		byte_255 = (unsigned int)eeprom[255];

		subsystem_id        = (byte_252 << 8) | byte_253;
		subsystem_vendor_id = (byte_254 << 8) | byte_255;

	        if (bootverbose)
	            printf("%s: subsystem 0x%04x 0x%04x\n", bktr_name(bktr),
			   subsystem_vendor_id, subsystem_id);

		if (subsystem_vendor_id == PCI_VENDOR_AVERMEDIA) {
			bktr->card = cards[ (card = CARD_AVER_MEDIA) ];
			bktr->card.eepromAddr = eeprom_i2c_address;
			bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
			goto checkTuner;
		}

		if (subsystem_vendor_id == PCI_VENDOR_HAUPPAUGE) {
			bktr->card = cards[ (card = CARD_HAUPPAUGE) ];
			bktr->card.eepromAddr = eeprom_i2c_address;
			bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
			goto checkTuner;
		}

		if ((subsystem_vendor_id == PCI_VENDOR_FLYVIDEO) ||
		    (subsystem_vendor_id == PCI_VENDOR_FLYVIDEO_2) ) {
			bktr->card = cards[ (card = CARD_FLYVIDEO) ];
			bktr->card.eepromAddr = eeprom_i2c_address;
			bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
			goto checkTuner;
		}

                if (subsystem_vendor_id == PCI_VENDOR_STB) {
                    bktr->card = cards[ (card = CARD_STB) ];
		    bktr->card.eepromAddr = eeprom_i2c_address;
		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
                    goto checkTuner;
                }

                if (subsystem_vendor_id == PCI_VENDOR_ASKEY) {
                    bktr->card = cards[ (card = CARD_ASKEY_DYNALINK_MAGIC_TVIEW) ];
		    bktr->card.eepromAddr = eeprom_i2c_address;
		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
                    goto checkTuner;
                }

                if ((subsystem_vendor_id == PCI_VENDOR_LEADTEK)
                 || (subsystem_vendor_id == PCI_VENDOR_LEADTEK_ALT)
		 || (subsystem_vendor_id == PCI_VENDOR_LEADTEK_ALT_2)
		 || (subsystem_vendor_id == PCI_VENDOR_LEADTEK_ALT_3)) {
		    if (subsystem_id == PCI_PRODUCT_LEADTEK_WINFAST_XP)
		        bktr->card = cards[ (card = CARD_LEADTEK_XP) ];
		    else
		        bktr->card = cards[ (card = CARD_LEADTEK) ];
		    bktr->card.eepromAddr = eeprom_i2c_address;
		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
                    goto checkTuner;
                }

		if (subsystem_vendor_id == PCI_VENDOR_PINNACLE_ALT) {
                    bktr->card = cards[ (card = CARD_MIRO) ];
		    bktr->card.eepromAddr = eeprom_i2c_address;
		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
                    goto checkTuner;
                }

		if (subsystem_vendor_id == PCI_VENDOR_TERRATEC) {
                    bktr->card = cards[ (card = CARD_TERRATVPLUS) ];
		    bktr->card.eepromAddr = eeprom_i2c_address;
		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
                    goto checkTuner;
                }

		if (subsystem_vendor_id == PCI_VENDOR_ATI) {
                    bktr->card = cards[ (card = CARD_TVWONDER) ];
		    bktr->card.eepromAddr = eeprom_i2c_address;
		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
                    goto checkTuner;
                }

		/*
		 * Check which card as the GV-BCTV4 and GV-BCTV5 IODATA make
		 * are somewhat different to the GV-BCTV3.
		 */

		if (subsystem_vendor_id == PCI_VENDOR_IODATA &&
		    subsystem_id == PCI_PRODUCT_IODATA_GV_BCTV3) {
		    bktr->card = cards[ (card = CARD_IO_BCTV3) ];
		    bktr->card.eepromAddr = eeprom_i2c_address;
		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
		    goto checkTuner;
		}

		if (subsystem_vendor_id == PCI_VENDOR_ZOLTRIX) {
		    if (subsystem_id == PCI_PRODUCT_ZOLTRIX_GENIE_TV_FM) {
			bktr->card = cards[ (card = CARD_ZOLTRIX_GENIE_FM) ];
		    } else {
			bktr->card = cards[ (card = CARD_ZOLTRIX) ];
		    }
 		    bktr->card.eepromAddr = eeprom_i2c_address;
 		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
		    goto checkTuner;
		}

                /* Vendor is unknown. We will use the standard probe code */
		/* which may not give best results */
                printf("%s: Warning "
		    "- card vendor 0x%04x (model 0x%04x) unknown.\n",
		    bktr_name(bktr), subsystem_vendor_id, subsystem_id);
            } else
                printf("%s: Card has no configuration EEPROM. "
		    "Cannot determine card make.\n", bktr_name(bktr));
	} /* end of bt878/bt879 card detection code */

	/* If we get to this point, we must have a Bt848/848A/849A card */
	/* or a Bt878/879 with an unknown subsystem vendor id */
        /* Try and determine the make of card by clever i2c probing */

   	/* Check for i2c devices. If none, move on */
	if (!any_i2c_devices) {
		bktr->card = cards[ (card = CARD_INTEL) ];
		bktr->card.eepromAddr = 0;
		bktr->card.eepromSize = 0;
		goto checkTuner;
	}

        /* Look for Hauppauge, STB and Osprey cards by the presence */
	/* of an EEPROM */
        /* Note: Bt878 based cards also use EEPROMs so we can only do this */
        /* test on BT848/848A and 849A based cards. */
	if ((bktr->id==BROOKTREE_848)  ||
	    (bktr->id==BROOKTREE_848A) ||
	    (bktr->id==BROOKTREE_849A)) {

            /* At i2c address 0xa0, look for Hauppauge and Osprey cards */
            if ( (status = i2cRead( bktr, PFC8582_RADDR )) != ABSENT ) {

		    /* Read the eeprom contents */
		    bktr->card = cards[ (card = CARD_UNKNOWN) ];
		    bktr->card.eepromAddr = PFC8582_WADDR;
		    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
	            readEEProm(bktr, 0, 128, eeprom );

		    /* For Hauppauge, check the EEPROM begins with 0x84 */
		    if (eeprom[0] == 0x84) {
                            bktr->card = cards[ (card = CARD_HAUPPAUGE) ];
			    bktr->card.eepromAddr = PFC8582_WADDR;
			    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
                            goto checkTuner;
		    }

		    /* For Osprey, check the EEPROM begins with "MMAC" */
		    if (  (eeprom[0] == 'M') &&(eeprom[1] == 'M')
			&&(eeprom[2] == 'A') &&(eeprom[3] == 'C')) {
                            bktr->card = cards[ (card = CARD_OSPREY) ];
			    bktr->card.eepromAddr = PFC8582_WADDR;
			    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
                            goto checkTuner;
		    }
		    printf("%s: Warning: Unknown card type. EEPROM data not recognised\n",
			   bktr_name(bktr));
		    printf("%s: %x %x %x %x\n", bktr_name(bktr),
			   eeprom[0],eeprom[1],eeprom[2],eeprom[3]);
            }

            /* look for an STB card */
            if ( (status = i2cRead( bktr, X24C01_RADDR )) != ABSENT ) {
                    bktr->card = cards[ (card = CARD_STB) ];
		    bktr->card.eepromAddr = X24C01_WADDR;
		    bktr->card.eepromSize = (u_char)(128 / EEPROMBLOCKSIZE);
                    goto checkTuner;
            }

	}

	signCard( bktr, 1, 128, (u_char *)  &probe_signature );

	if (bootverbose) {
	  printf("%s: card signature: ", bktr_name(bktr));
	  for (j = 0; j < Bt848_MAX_SIGN; j++) {
	    printf(" %02x ", probe_signature[j]);
	  }
	  printf("\n\n");
	}
	for (i = 0;
	     i < (sizeof bt848_card_signature)/ sizeof (struct bt848_card_sig);
	     i++ ) {

	  card_found = 1;
	  probe_temp = (u_char *) &bt848_card_signature[i].signature;

	  for (j = 0; j < Bt848_MAX_SIGN; j++) {
	    if ((probe_temp[j] & 0xf) != (probe_signature[j] & 0xf)) {
	      card_found = 0;
	      break;
	    }

	  }
	  if (card_found) {
	    bktr->card = cards[ card = bt848_card_signature[i].card];
	    eeprom_i2c_address = locate_eeprom_address( bktr );
	    if (eeprom_i2c_address != -1) {
		bktr->card.eepromAddr = eeprom_i2c_address;
		bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
	    } else {
		bktr->card.eepromAddr = 0;
		bktr->card.eepromSize = 0;
	    }
	    tuner_i2c_address = locate_tuner_address( bktr );
	    select_tuner( bktr, bt848_card_signature[i].tuner );
	    goto checkDBX;
	  }
	}

	/* We do not know the card type. Default to Miro */
	bktr->card = cards[ (card = CARD_MIRO) ];


checkEEPROM:
	/* look for a configuration eeprom */
	eeprom_i2c_address = locate_eeprom_address( bktr );
	if (eeprom_i2c_address != -1) {
	    bktr->card.eepromAddr = eeprom_i2c_address;
	    bktr->card.eepromSize = (u_char)(256 / EEPROMBLOCKSIZE);
	} else {
	    bktr->card.eepromAddr = 0;
	    bktr->card.eepromSize = 0;
	}


checkTuner:

	/* look for a tuner */
	tuner_i2c_address = locate_tuner_address( bktr );
	if ( tuner_i2c_address == -1 ) {
		select_tuner( bktr, NO_TUNER );
		goto checkDBX;
	}

#if defined( BKTR_OVERRIDE_TUNER )
	select_tuner( bktr, BKTR_OVERRIDE_TUNER );
	goto checkDBX;
#endif
	if (bktr->bt848_tuner != -1 ) {
	  select_tuner( bktr, bktr->bt848_tuner & 0xff );
	  goto checkDBX;
	}

	/* Check for i2c devices */
	if (!any_i2c_devices) {
		select_tuner( bktr, NO_TUNER );
		goto checkDBX;
	}

	/* differentiate type of tuner */

	switch (card) {
	case CARD_MIRO:
	    switch (((INL(bktr, BKTR_GPIO_DATA) >> 10)-1)&7) {
	    case 0: select_tuner( bktr, TEMIC_PAL ); break;
	    case 1: select_tuner( bktr, PHILIPS_PAL ); break;
	    case 2: select_tuner( bktr, PHILIPS_NTSC ); break;
	    case 3: select_tuner( bktr, PHILIPS_SECAM ); break;
	    case 4: select_tuner( bktr, NO_TUNER ); break;
	    case 5: select_tuner( bktr, PHILIPS_PALI ); break;
	    case 6: select_tuner( bktr, TEMIC_NTSC ); break;
	    case 7: select_tuner( bktr, TEMIC_PALI ); break;
	    }
	    goto checkDBX;
	    break;

	case CARD_HAUPPAUGE:
	    /* Hauppauge kindly supplied the following Tuner Table */
	    /* FIXME: I think the tuners the driver selects for types */
	    /* 0x08 and 0x15 may be incorrect but no one has complained. */
	    /* Old Temic tuners had their own API, but newer Temic tuners */
	    /* have the same API as Philips tuners */
	    /*
  ID  Tuner Model           Format			We select Format
 0x00 NONE
 0x01 EXTERNAL
 0x02 OTHER
 0x03 Philips FI1216        BG
 0x04 Philips FI1216MF      BGLL'			PHILIPS_SECAM
 0x05 Philips FI1236        MN 				PHILIPS_NTSC
 0x06 Philips FI1246        I 				PHILIPS_PALI
 0x07 Philips FI1256        DK
 0x08 Philips FI1216 MK2    BG 				PHILIPS_PALI
 0x09 Philips FI1216MF MK2  BGLL' 			PHILIPS_SECAM
 0x0a Philips FI1236 MK2    MN 				PHILIPS_NTSC
 0x0b Philips FI1246 MK2    I 				PHILIPS_PALI
 0x0c Philips FI1256 MK2    DK
 0x0d Temic 4032FY5         NTSC			TEMIC_NTSC
 0x0e Temic 4002FH5         BG				TEMIC_PAL
 0x0f Temic 4062FY5         I 				TEMIC_PALI
 0x10 Philips FR1216 MK2    BG
 0x11 Philips FR1216MF MK2  BGLL' 			PHILIPS_FR1236_SECAM
 0x12 Philips FR1236 MK2    MN 				PHILIPS_FR1236_NTSC
 0x13 Philips FR1246 MK2    I
 0x14 Philips FR1256 MK2    DK
 0x15 Philips FM1216        BG 				PHILIPS_FR1216_PAL
 0x16 Philips FM1216MF      BGLL' 			PHILIPS_FR1236_SECAM
 0x17 Philips FM1236        MN 				PHILIPS_FR1236_NTSC
 0x18 Philips FM1246        I
 0x19 Philips FM1256        DK
 0x1a Temic 4036FY5         MN (FI1236 MK2 clone)	PHILIPS_NTSC
 0x1b Samsung TCPN9082D     MN
 0x1c Samsung TCPM9092P     Pal BG/I/DK
 0x1d Temic 4006FH5         BG				PHILIPS_PALI
 0x1e Samsung TCPN9085D     MN/Radio
 0x1f Samsung TCPB9085P     Pal BG/I/DK / Radio
 0x20 Samsung TCPL9091P     Pal BG & Secam L/L'
 0x21 Temic 4039FY5         NTSC Radio
 0x22 Philips FQ1216ME      Pal BGIDK & Secam L/L'
 0x23 Temic 4066FY5         Pal I (FI1246 MK2 clone)	PHILIPS_PALI
 0x24 Philips TD1536        MN/ATSCDigital
 0x25 Philips TD1536D       MN/ATSCDigital DUAL INPUT
 0x26 Philips FMR1236       M/N FM(no demod)
 0x27 Philips FI1256MP      B/G, D/K
 0x28 Samsung TCPQ9091P     BG/I/DK, L/L'
 0x29 Temic 4006FN5         BG/I/DK
 0x2a Temic 4009FR5         BG FM			PHILIPS_FR1216_PAL
 0x2b Temic 4046FM5         B/G, I, D/K, L/L'
 0x2c Temic 4009FN5         B/G, I, D/K, FM (no demod)
 0x2d Philips TD1536D_FH_44 MN/ATSCDigital DUAL INPUT
	    */


	    /* Determine the model number from the eeprom */
	    if (bktr->card.eepromAddr != 0) {
	        /* eeprom data block structure */
	        unsigned char *block_1, *block_2, *block_3, *block_4;
	        int block_1_data_size,  block_2_data_size, block_3_data_size;
	        int block_1_total_size, block_2_total_size, block_3_total_size;
		int block_4_header_size;

		unsigned int model,revision;
		unsigned char tuner_code;
		unsigned char no_audio_mux;

		readEEProm(bktr, 0, 128, eeprom);

	        /* LOCATE THE EEPROM DATA BLOCKS */
	        block_1 = &eeprom[0];
	        block_1_data_size = (block_1[2] << 8 | block_1[1]);
	        block_1_total_size = block_1_data_size + 3; /* Header bytes */

	        block_2 = &eeprom[block_1_total_size];
	        block_2_data_size = (block_2[2] << 8 | block_2[1]);
	        block_2_total_size = block_2_data_size + 3; /* Header bytes */

	        block_3 = &eeprom[block_1_total_size + block_2_total_size];
	        block_3_data_size = (block_3[0] &0x07);
	        block_3_total_size = block_3_data_size + 1; /* Header size */

	        block_4 = &eeprom[block_1_total_size +block_2_total_size +block_3_total_size];
	        block_4_header_size = 1;

		model    = (block_1[12] << 8  | block_1[11]);
		revision = (block_1[15] << 16 | block_1[14] << 8 | block_1[13]);

		tuner_code = block_1[9];

		no_audio_mux = ((block_3[3] >> 7) &0x01);

		if (no_audio_mux) bktr->audio_mux_present = 0;

		if (verbose)
		    printf("%s: Hauppauge Model %d %c%c%c%c\n",
			   bktr_name(bktr),
			   model,
			   ((revision >> 18) & 0x3f) + 32,
			   ((revision >> 12) & 0x3f) + 32,
			   ((revision >>  6) & 0x3f) + 32,
			   ((revision >>  0) & 0x3f) + 32 );

	        /* Determine the tuner type from the eeprom */

		switch (tuner_code) {

		  case 0x5:
                  case 0x0a:
                  case 0x1a:
		    select_tuner( bktr, PHILIPS_NTSC );
		    goto checkDBX;

		  case 0x4:
                  case 0x9:
		    select_tuner( bktr, PHILIPS_SECAM );
		    goto checkDBX;

                  case 0x11:
	          case 0x16:
		    select_tuner( bktr, PHILIPS_FR1236_SECAM );
		    goto checkDBX;

		  case 0x12:
		  case 0x17:
		  case 0x21:	/* hauppage #191 wintv-fm -wsr 2003/1/13 */
		    select_tuner( bktr, PHILIPS_FR1236_NTSC );
		    goto checkDBX;

		  case 0x6:
	          case 0x8:
	          case 0xb:
	          case 0x1d:
	          case 0x23:
		    select_tuner( bktr, PHILIPS_PALI );
		    goto checkDBX;

	          case 0xd:
		    select_tuner( bktr, TEMIC_NTSC );
		    goto checkDBX;

                  case 0xe:
		    select_tuner( bktr, TEMIC_PAL );
		    goto checkDBX;

	          case 0xf:
		    select_tuner( bktr, TEMIC_PALI );
		    goto checkDBX;

                  case 0x15:
		    select_tuner( bktr, PHILIPS_FR1216_PAL );
		    goto checkDBX;

                  case 0x2a:
		    bktr->msp_use_mono_source = 1;
		    select_tuner( bktr, PHILIPS_FR1216_PAL );
		    goto checkDBX;

	          default :
		    printf("%s: Warning - Unknown Hauppauge Tuner 0x%x\n",
			   bktr_name(bktr), tuner_code);
		}
	    }
	    break;


	case CARD_AVER_MEDIA:
	    /* AVerMedia kindly supplied some details of their EEPROM contents
	     * which allow us to auto select the Tuner Type.
	     * Only the newer AVerMedia cards actually have an EEPROM.
	     */
	    if (bktr->card.eepromAddr != 0) {

		u_char tuner_make;   /* Eg Philips, Temic */
		u_char tuner_tv_fm;  /* TV or TV with FM Radio */
		u_char tuner_format; /* Eg NTSC, PAL, SECAM */
		int    tuner;

		int tuner_0_table[] = {
			PHILIPS_NTSC,  PHILIPS_PAL,
			PHILIPS_PAL,   PHILIPS_PAL,
			PHILIPS_PAL,   PHILIPS_PAL,
			PHILIPS_SECAM, PHILIPS_SECAM,
			PHILIPS_SECAM, PHILIPS_PAL};

		int tuner_0_fm_table[] = {
			PHILIPS_FR1236_NTSC,  PHILIPS_FR1216_PAL,
			PHILIPS_FR1216_PAL,   PHILIPS_FR1216_PAL,
			PHILIPS_FR1216_PAL,   PHILIPS_FR1216_PAL,
			PHILIPS_FR1236_SECAM, PHILIPS_FR1236_SECAM,
			PHILIPS_FR1236_SECAM, PHILIPS_FR1216_PAL};

		int tuner_1_table[] = {
			TEMIC_NTSC,  TEMIC_PAL,   TEMIC_PAL,
			TEMIC_PAL,   TEMIC_PAL,   TEMIC_PAL,
			TEMIC_SECAM, TEMIC_SECAM, TEMIC_SECAM,
			TEMIC_PAL};


		/* Extract information from the EEPROM data */
	    	readEEProm(bktr, 0, 128, eeprom);

		tuner_make   = (eeprom[0x41] & 0x7);
		tuner_tv_fm  = (eeprom[0x41] & 0x18) >> 3;
		tuner_format = (eeprom[0x42] & 0xf0) >> 4;

		/* Treat tuner make 0 (Philips) and make 2 (LG) the same */
		if ( ((tuner_make == 0) || (tuner_make == 2))
		    && (tuner_format <= 9) && (tuner_tv_fm == 0) ) {
			tuner = tuner_0_table[tuner_format];
			select_tuner( bktr, tuner );
			goto checkDBX;
		}

		if ( ((tuner_make == 0) || (tuner_make == 2))
		    && (tuner_format <= 9) && (tuner_tv_fm == 1) ) {
			tuner = tuner_0_fm_table[tuner_format];
			select_tuner( bktr, tuner );
			goto checkDBX;
		}

		if ( (tuner_make == 1) && (tuner_format <= 9) ) {
			tuner = tuner_1_table[tuner_format];
			select_tuner( bktr, tuner );
			goto checkDBX;
		}

	    	printf("%s: Warning - Unknown AVerMedia Tuner Make %d Format %d\n",
			bktr_name(bktr), tuner_make, tuner_format);
	    }
	    break;

	case CARD_LEADTEK:
#if BKTR_SYSTEM_DEFAULT == BROOKTREE_PAL
	    select_tuner( bktr, PHILIPS_FR1216_PAL );
#else
	    select_tuner( bktr, PHILIPS_FR1236_NTSC );
#endif
            goto checkDBX;
	    break;

	case CARD_TVWONDER:
	    select_tuner( bktr, PHILIPS_NTSC );
	    goto checkDBX;
	    break;

	case CARD_ZOLTRIX_GENIE_FM:
	    select_tuner( bktr, PHILIPS_FR1236_NTSC );
	    goto checkDBX;
	    break;

	case CARD_IO_BCTV3:
	    select_tuner( bktr, ALPS_TSCH5 ); /* ALPS_TSCH6, in fact. */
	    goto checkDBX;
 	    break;

	case CARD_LEADTEK_XP:
	    select_tuner( bktr, TIVISION_TVF5533 );
	    goto checkDBX;
	    break;

	} /* end switch(card) */


	/* At this point, a goto checkDBX has not occurred */
	/* We have not been able to select a Tuner */
	/* Some cards make use of the tuner address to */
	/* identify the make/model of tuner */

	/* At address 0xc0/0xc1 we often find a TEMIC NTSC */
	if ( i2cRead( bktr, 0xc1 ) != ABSENT ) {
	    select_tuner( bktr, TEMIC_NTSC );
	    goto checkDBX;
	}

	/* At address 0xc6/0xc7 we often find a PHILIPS NTSC Tuner */
	if ( i2cRead( bktr, 0xc7 ) != ABSENT ) {
	    select_tuner( bktr, PHILIPS_NTSC );
	    goto checkDBX;
	}

	/* Address 0xc2/0xc3 is default (or common address) for several */
	/* tuners and we cannot tell which is which. */
	/* And for all other tuner i2c addresses, select the default */
	select_tuner( bktr, DEFAULT_TUNER );


checkDBX:
#if defined( BKTR_OVERRIDE_DBX )
	bktr->card.dbx = BKTR_OVERRIDE_DBX;
	goto checkMSP;
#endif
   /* Check for i2c devices */
	if (!any_i2c_devices) {
		goto checkMSP;
	}

	/* probe for BTSC (dbx) chip */
	if ( i2cRead( bktr, TDA9850_RADDR ) != ABSENT )
		bktr->card.dbx = 1;

checkMSP:
	/* If this is a Hauppauge Bt878 card, we need to enable the
	 * MSP 34xx audio chip.
	 * If this is a Hauppauge Bt848 card, reset the MSP device.
	 * The MSP reset line is wired to GPIO pin 5. On Bt878 cards a pulldown
	 * resistor holds the device in reset until we set GPIO pin 5.
	 */

	/* Optionally skip the MSP reset. This is handy if you initialise the
	 * MSP audio in another operating system (eg Windows) first and then
	 * do a soft reboot.
	 */

#ifndef BKTR_NO_MSP_RESET
	if (card == CARD_HAUPPAUGE) {
	    OUTL(bktr, BKTR_GPIO_OUT_EN, INL(bktr, BKTR_GPIO_OUT_EN) | (1<<5));
	    OUTL(bktr, BKTR_GPIO_DATA, INL(bktr, BKTR_GPIO_DATA) | (1<<5));  /* write '1' */
	    DELAY(2500); /* wait 2.5ms */
	    OUTL(bktr, BKTR_GPIO_DATA, INL(bktr, BKTR_GPIO_DATA) & ~(1<<5)); /* write '0' */
	    DELAY(2500); /* wait 2.5ms */
	    OUTL(bktr, BKTR_GPIO_DATA, INL(bktr, BKTR_GPIO_DATA) | (1<<5));  /* write '1' */
	    DELAY(2500); /* wait 2.5ms */
	}
#endif

#if defined( BKTR_OVERRIDE_MSP )
	bktr->card.msp3400c = BKTR_OVERRIDE_MSP;
	goto checkMSPEnd;
#endif

	/* Check for i2c devices */
	if (!any_i2c_devices) {
		goto checkMSPEnd;
	}

	if ( i2cRead( bktr, MSP3400C_RADDR ) != ABSENT ) {
		bktr->card.msp3400c = 1;
	}

checkMSPEnd:

	if (bktr->card.msp3400c) {
		bktr->msp_addr = MSP3400C_WADDR;
		msp_read_id( bktr );
		printf("%s: Detected a MSP%s at 0x%x\n", bktr_name(bktr),
		       bktr->msp_version_string,
		       bktr->msp_addr);

	}

/* Check for Dolby Surround Sound DPL3518A sound chip */
	if ( i2cRead( bktr, DPL3518A_RADDR ) != ABSENT ) {
		bktr->card.dpl3518a = 1;
	}

	if (bktr->card.dpl3518a) {
		bktr->dpl_addr = DPL3518A_WADDR;
		dpl_read_id( bktr );
		printf("%s: Detected a DPL%s at 0x%x\n", bktr_name(bktr),
		       bktr->dpl_version_string,
		       bktr->dpl_addr);
	}

/* Start of Check Remote */
	/* Check for the Hauppauge IR Remote Control */
	/* If there is an external unit, the internal will be ignored */

	bktr->remote_control = 0; /* initial value */

	if (any_i2c_devices) {
		if (i2cRead( bktr, HAUP_REMOTE_EXT_RADDR ) != ABSENT ) {
			bktr->remote_control      = 1;
			bktr->remote_control_addr = HAUP_REMOTE_EXT_RADDR;
		} else if (i2cRead( bktr, HAUP_REMOTE_INT_RADDR ) != ABSENT ) {
			bktr->remote_control      = 1;
			bktr->remote_control_addr = HAUP_REMOTE_INT_RADDR;
		}
	}

	/* If a remote control is found, poll it 5 times to turn off the LED */
	if (bktr->remote_control) {
		int i;
		for (i=0; i<5; i++)
			i2cRead( bktr, bktr->remote_control_addr );
	}
/* End of Check Remote */

#if defined( BKTR_USE_PLL )
	bktr->xtal_pll_mode = BT848_USE_PLL;
	goto checkPLLEnd;
#endif
	/* Default is to use XTALS and not PLL mode */
	bktr->xtal_pll_mode = BT848_USE_XTALS;

	/* Enable PLL mode for OSPREY users */
	if (card == CARD_OSPREY)
		bktr->xtal_pll_mode = BT848_USE_PLL;

	/* Enable PLL mode for Video Highway Xtreme users */
	if (card == CARD_VIDEO_HIGHWAY_XTREME)
		bktr->xtal_pll_mode = BT848_USE_PLL;

	/* Enable PLL mode for ATI TV_Wonder/VE */
	if (card == CARD_TVWONDER)
		bktr->xtal_pll_mode = BT848_USE_PLL;


	/* Most (perhaps all) Bt878 cards need to be switched to PLL mode */
	/* as they only fit the NTSC crystal to their cards */
	/* Default to enabling PLL mode for all Bt878/879 cards */

	if ((bktr->id==BROOKTREE_878 || bktr->id==BROOKTREE_879) )
		bktr->xtal_pll_mode = BT848_USE_PLL;


#if defined( BKTR_USE_PLL )
checkPLLEnd:
#endif


	bktr->card.tuner_pllAddr = tuner_i2c_address;

	if ( verbose ) {
		printf( "%s: %s", bktr_name(bktr), bktr->card.name );
		if ( bktr->card.tuner )
			printf( ", %s tuner", bktr->card.tuner->name );
		if ( bktr->card.dbx )
			printf( ", dbx stereo" );
		if ( bktr->card.msp3400c )
			printf( ", msp3400c stereo" );
		if ( bktr->card.dpl3518a )
			printf( ", dpl3518a dolby" );
		if ( bktr->remote_control )
			printf( ", remote control" );
		printf( ".\n" );
	}
}

#undef ABSENT