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/*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*
* $FreeBSD$
*/
/*
* Bulogic/Bustek 32 bit Addressing Mode SCSI driver.
*
* NOTE: 1. Some bt5xx card can NOT handle 32 bit addressing mode.
* 2. OLD bt445s Revision A,B,C,D(nowired) + any firmware version
* has broken busmaster for handling 32 bit addressing on H/W bus
* side.
*
* 3. Extended probing still needs confirmation from our user base, due
* to several H/W and firmware dependencies. If you have a problem
* with extended probing, please contact 'amurai@spec.co.jp'
*
* amurai@spec.co.jp 94/6/16
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <i386/isa/isa_device.h>
#include <i386/scsi/btreg.h>
static int bt_isa_probe __P((struct isa_device *dev));
static int bt_isa_attach __P((struct isa_device *dev));
struct isa_driver btdriver =
{
bt_isa_probe,
bt_isa_attach,
"bt"
};
/*
* Check if the device can be found at the port given
* and if so, set it up ready for further work
* as an argument, takes the isa_device structure from
* autoconf.c
*/
static int
bt_isa_probe(dev)
struct isa_device *dev;
{
/*
* find unit and check we have that many defined
*/
int unit = bt_unit;
struct bt_data *bt;
/*
* We ignore the unit number assigned by config to allow
* consistant numbering between PCI/EISA/ISA devices.
* This is a total kludge until we have a configuration
* manager.
*/
dev->id_unit = bt_unit;
/*
* Allocate a storage area for us
*/
bt = bt_alloc(unit, dev->id_iobase);
if (!bt)
return 0;
/*
* Try initialise a unit at this location
* sets up dma and bus speed, loads bt->bt_int
*/
if (bt_init(bt) != 0) {
bt_free(bt);
return 0;
}
/*
* If it's there, put in it's interrupt vectors
*/
dev->id_unit = unit;
dev->id_irq = (1 << bt->bt_int);
dev->id_drq = bt->bt_dma;
bt_unit++;
return 1;
}
/*
* Attach all the sub-devices we can find
*/
static int
bt_isa_attach(dev)
struct isa_device *dev;
{
int unit = dev->id_unit;
struct bt_data *bt = btdata[unit];
return( bt_attach(bt) );
}
/*
* Handle an ISA interrupt.
* XXX should go away as soon as ISA interrupt handlers
* take a (void *) arg.
*/
void
bt_isa_intr(unit)
int unit;
{
struct bt_data* arg = btdata[unit];
bt_intr((void *)arg);
}
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