2af488412c
the current unit in bt_unit. We do this as a kludge to make the unit nubmer work properly between the pci/eisa/isa bt boards that are in the system.
155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
/*
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* Written by Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems for use under the MACH(2.5) operating system.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* $Id: bt5xx-445.c,v 1.2 1995/12/14 14:19:15 peter Exp $
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*/
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/*
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* Bulogic/Bustek 32 bit Addressing Mode SCSI driver.
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*
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* NOTE: 1. Some bt5xx card can NOT handle 32 bit addressing mode.
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* 2. OLD bt445s Revision A,B,C,D(nowired) + any firmware version
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* has broken busmaster for handling 32 bit addressing on H/W bus
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* side.
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*
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* 3. Extended probing still needs confirmation from our user base, due
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* to several H/W and firmware dependencies. If you have a problem
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* with extended probing, please contact 'amurai@spec.co.jp'
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*
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* amurai@spec.co.jp 94/6/16
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/devconf.h>
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#include <scsi/scsi_all.h>
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#include <scsi/scsiconf.h>
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#include <i386/isa/isa_device.h>
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#include <i386/scsi/btreg.h>
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static int bt_isa_probe __P((struct isa_device *dev));
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static int bt_isa_attach __P((struct isa_device *dev));
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struct isa_driver btdriver =
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{
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bt_isa_probe,
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bt_isa_attach,
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"bt"
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};
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static struct kern_devconf kdc_isa_bt = {
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0, 0, 0, /* filled in by dev_attach */
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"bt", 0, { MDDT_ISA, 0, "bio" },
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isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
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&kdc_isa0, /* parent */
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0, /* parentdata */
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DC_UNCONFIGURED, /* always start here */
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NULL,
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DC_CLS_MISC /* host adapters aren't special */
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};
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static inline void
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bt_isa_registerdev(struct isa_device *id)
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{
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#ifdef BOGUS
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if(id->id_unit)
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kdc_bt[id->id_unit] = kdc_bt[0];
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kdc_bt[id->id_unit].kdc_unit = id->id_unit;
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kdc_bt[id->id_unit].kdc_parentdata = id;
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dev_attach(&kdc_bt[id->id_unit]);
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#endif
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}
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/*
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* Check if the device can be found at the port given
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* and if so, set it up ready for further work
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* as an argument, takes the isa_device structure from
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* autoconf.c
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*/
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static int
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bt_isa_probe(dev)
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struct isa_device *dev;
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{
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/*
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* find unit and check we have that many defined
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*/
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int unit = bt_unit;
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struct bt_data *bt;
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/*
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* We ignore the unit number assigned by config to allow
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* consistant numbering between PCI/EISA/ISA devices.
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* This is a total kludge until we have a configuration
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* manager.
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*/
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dev->id_unit = bt_unit;
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/*
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* Allocate a storage area for us
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*/
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bt = bt_alloc(unit, dev->id_iobase);
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if (!bt)
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return 0;
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#ifndef DEV_LKM
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bt_isa_registerdev(dev);
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#endif /* not DEV_LKM */
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/*
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* Try initialise a unit at this location
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* sets up dma and bus speed, loads bt->bt_int
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*/
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if (bt_init(bt) != 0) {
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bt_free(bt);
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return 0;
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}
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/*
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* If it's there, put in it's interrupt vectors
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*/
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dev->id_unit = unit;
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dev->id_irq = (1 << bt->bt_int);
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dev->id_drq = bt->bt_dma;
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bt_unit++;
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return 1;
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}
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/*
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* Attach all the sub-devices we can find
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*/
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static int
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bt_isa_attach(dev)
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struct isa_device *dev;
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{
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int unit = dev->id_unit;
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struct bt_data *bt = btdata[unit];
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return( bt_attach(bt) );
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}
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/*
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* Handle an ISA interrupt.
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* XXX should go away as soon as ISA interrupt handlers
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* take a (void *) arg.
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*/
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void
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bt_isa_intr(unit)
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int unit;
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{
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struct bt_data* arg = btdata[unit];
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bt_intr((void *)arg);
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}
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