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/*
* Copyright (c) by Jaroslav Kysela <perex@jcu.cz>
* Detection routines for Sound Blaster cards
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "driver.h"
#include "pcm.h"
#include "mixer.h"
#include "sb.h"
#define DSB( port, reg ) ( port + s_b_SB_##reg )
static int snd_sb_dsp_command( unsigned short port, unsigned char val )
{
int i;
for ( i = 10000; i; i-- )
if ( ( inb( DSB( port, STATUS ) ) & 0x80 ) == 0 ) {
outb( val, DSB( port, COMMAND ) );
return 1;
}
#ifdef ULTRACFG_DEBUG
printk( "snd_sb_dsp_command: timeout (0x%x)\n", val );
#endif
return 0;
}
#if 0
static int snd_sb_dsp_get_byte( unsigned short port )
{
int i;
for ( i = 1000; i; i-- )
if ( inb( DSB( port, DATA_AVAIL ) ) & 0x80 )
return inb( DSB( port, READ ) );
snd_printd( "sb get byte failed: 0x%x = 0x%x!!!\n", DSB( port, DATA_AVAIL ), inb( DSB( port, DATA_AVAIL ) ) );
return -ENODEV;
}
#endif
static int snd_sb_reset( unsigned short port )
{
int i;
outb( 1, DSB( port, RESET ) );
snd_delay( 1 );
outb( 0, DSB( port, RESET ) );
snd_delay( 3 );
for ( i = 0; i < 1000 && !(inb( DSB( port, DATA_AVAIL ) ) & 0x80); i++ );
if ( inb( DSB( port, READ ) ) != 0xaa ) {
#ifdef ULTRACFG_DEBUG
snd_printk( "sb_reset: failed!!!\n" );
#endif
return -ENODEV;
}
return 0;
}
int snd_detect_sb( snd_card_t *card, char *rname, unsigned int *rtype, unsigned short *rport )
{
static short possible_ports[] = { 0x220, 0x240, 0x260, -1 };
unsigned short major, minor, version;
short *pport, port;
int i;
char str[ 12 ];
for ( pport = possible_ports; *pport > 0; pport++ ) {
port = *rport = *pport;
if ( snd_register_ioport( card, port, 16, "Sound Blaster" ) < 0 )
continue;
/*
* initialization sequence
*/
if ( snd_sb_reset( port ) < 0 ) {
snd_printdd( "SB: [0x%x] reset failed... 0x%x\n", port, inb( DSB( port, READ ) ) );
goto __nodev;
}
snd_sb_dsp_command( port, SB_DSP_GET_VERSION ); /* return identification */
for ( i = 1000, major = minor = 0; i; i-- ) {
if ( inb( DSB( port, DATA_AVAIL ) ) & 0x80 )
if ( major == 0 )
major = inb( DSB( port, READ ) );
else
minor = inb( DSB( port, READ ) );
}
snd_printdd( "SB: [0x%x] found.. major = 0x%x, minor = 0x%x\n", port, major, minor );
version = (major << 8) | minor;
if ( !version ) goto __nodev; /* probably SB */
switch ( major ) {
case 1:
strcpy( rname, "Sound Blaster 1.0" );
*rtype = SND_CARD_TYPE_SB_10;
break;
case 2:
strcpy( rname, minor > 1 ? "Sound Blaster 2.01+" : "Sound Blaster 2.0" );
*rtype = SND_CARD_TYPE_SB_20;
break;
case 3:
strcpy( rname, "Sound Blaster Pro" );
*rtype = SND_CARD_TYPE_SB_PRO;
break;
case 4:
strcpy( rname, "Sound Blaster 16" );
*rtype = SND_CARD_TYPE_SB_16;
break;
default:
snd_printk( "detect: Sound Blaster DSP chip found at 0x%x, but version 0x%x isn't known\n", port, version );
goto __nodev;
}
sprintf( str, " (%i.%i)", major, minor );
strcat( rname, str );
return 0;
__nodev:
snd_unregister_ioports( card );
}
return -ENODEV;
}
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