793ac7a94c
Fix off by one error in slot probe. Update some comments. Submitted by: rgrimes@FreeBSD.org
151 lines
4.4 KiB
C
151 lines
4.4 KiB
C
/*
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* Product specific probe and attach routines for:
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* 27/284X and aic7770 motherboard SCSI controllers
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*
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* Copyright (c) 1995 Justin T. Gibbs
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Absolutely no warranty of function or purpose is made by the author
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* Justin T. Gibbs.
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* 4. Modifications may be freely made to this file if the above conditions
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* are met.
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*
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* $Id: aic7770.c,v 1.11 1995/03/07 08:58:22 gibbs Exp $
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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 <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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#include <scsi/scsi_all.h>
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#include <scsi/scsiconf.h>
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#include <sys/devconf.h>
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#include <machine/cpufunc.h>
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#include <i386/scsi/aic7xxx.h>
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int aic7770probe __P((struct isa_device *dev));
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int aic7770_attach __P((struct isa_device *dev));
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/*
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* Standard EISA Host ID regs (Offset from slot base)
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*/
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#define HID0 0xC80 /* 0,1: msb of ID2, 2-7: ID1 */
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#define HID1 0xC81 /* 0-4: ID3, 5-7: LSB ID2 */
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#define HID2 0xC82 /* product */
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#define HID3 0xC83 /* firmware revision */
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#define CHAR1(B1,B2) (((B1>>2) & 0x1F) | '@')
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#define CHAR2(B1,B2) (((B1<<3) & 0x18) | ((B2>>5) & 0x7)|'@')
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#define CHAR3(B1,B2) ((B2 & 0x1F) | '@')
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#define EISA_MAX_SLOTS 16 /* XXX should be defined in a common header */
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static ahc_slot = 0; /* slot last board was found in */
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struct isa_driver ahcdriver = {aic7770probe, aic7770_attach, "ahc"};
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typedef struct
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{
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ahc_type type;
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unsigned char id; /* The Last EISA Host ID reg */
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} aic7770_sig;
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static struct kern_devconf kdc_aic7770[NAHC] = { {
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0, 0, 0, /* filled in by dev_attach */
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"ahc", 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_BUSY, /* host adapters are always ``in use'' */
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"Adaptec aic7770 based SCSI host adapter"
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} };
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static inline void
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aic7770_registerdev(struct isa_device *id)
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{
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if(id->id_unit)
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kdc_aic7770[id->id_unit] = kdc_aic7770[0];
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kdc_aic7770[id->id_unit].kdc_unit = id->id_unit;
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kdc_aic7770[id->id_unit].kdc_parentdata = id;
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dev_attach(&kdc_aic7770[id->id_unit]);
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}
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int
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aic7770probe(struct isa_device *dev)
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{
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u_long port;
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int i;
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u_char sig_id[4];
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aic7770_sig valid_ids[] = {
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/* Entries of other tested adaptors should be added here */
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{ AHC_274, 0x71 }, /*274x*/
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{ AHC_274, 0x70 }, /*aic7770 on Motherboard*/
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{ AHC_284, 0x56 }, /*284x, BIOS enabled*/
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{ AHC_284, 0x57 } /*284x, BIOS disabled*/
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};
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ahc_slot++;
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while (ahc_slot < EISA_MAX_SLOTS) {
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port = 0x1000 * ahc_slot;
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for( i = 0; i < sizeof(sig_id); i++ )
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{
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/*
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* An outb is required to prime these registers on
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* VL cards
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*/
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outb( port + HID0, HID0 + i );
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sig_id[i] = inb(port + HID0 + i);
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}
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if (sig_id[0] == 0xff) {
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ahc_slot++;
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continue;
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}
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/* Check manufacturer's ID. */
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if ((CHAR1(sig_id[0], sig_id[1]) == 'A')
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&& (CHAR2(sig_id[0], sig_id[1]) == 'D')
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&& (CHAR3(sig_id[0], sig_id[1]) == 'P')
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&& (sig_id[2] == 0x77)) {
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for(i=0; i < sizeof(valid_ids)/sizeof(aic7770_sig);i++)
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if ( sig_id[3] == valid_ids[i].id ) {
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int unit = dev->id_unit;
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dev->id_iobase = port;
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if(ahcprobe(unit, port,
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valid_ids[i].type)){
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/*
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* If it's there, put in it's
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* interrupt vectors
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*/
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dev->id_irq = (1 <<
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ahcdata[unit]->vect);
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dev->id_drq = -1; /* EISA dma */
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ahc_unit++;
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return IO_EISASIZE;
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}
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}
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}
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ahc_slot++;
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}
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return 0;
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}
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int
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aic7770_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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aic7770_registerdev(dev);
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return ahc_attach(unit);
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}
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