338 lines
7.9 KiB
C
338 lines
7.9 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, 1996 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 1.25 1996/02/26 01:01:40 gibbs Exp $
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*/
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#include "eisa.h"
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#if NEISA > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/devconf.h>
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#include <sys/kernel.h>
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#include <scsi/scsi_all.h>
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#include <scsi/scsiconf.h>
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#include <machine/clock.h>
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#include <i386/eisa/eisaconf.h>
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#include <i386/scsi/aic7xxx.h>
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#include <dev/aic7xxx/aic7xxx_reg.h>
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#define EISA_DEVICE_ID_ADAPTEC_AIC7770 0x04907770
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#define EISA_DEVICE_ID_ADAPTEC_274x 0x04907771
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#define EISA_DEVICE_ID_ADAPTEC_284xB 0x04907756 /* BIOS enabled */
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#define EISA_DEVICE_ID_ADAPTEC_284x 0x04907757 /* BIOS disabled*/
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#define AHC_EISA_SLOT_OFFSET 0xc00
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#define AHC_EISA_IOSIZE 0x100
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#define INTDEF 0x5cul /* Interrupt Definition Register */
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static int aic7770probe __P((void));
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static int aic7770_attach __P((struct eisa_device *e_dev));
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static struct eisa_driver ahc_eisa_driver = {
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"ahc",
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aic7770probe,
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aic7770_attach,
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/*shutdown*/NULL,
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&ahc_unit
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};
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DATA_SET (eisadriver_set, ahc_eisa_driver);
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static struct kern_devconf kdc_aic7770 = {
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0, 0, 0, /* filled in by dev_attach */
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"ahc", 0, { MDDT_EISA, 0, "bio" },
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eisa_generic_externalize, 0, 0, EISA_EXTERNALLEN,
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&kdc_eisa0, /* parent */
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0, /* parentdata */
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DC_UNCONFIGURED, /* always start out 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 char *aic7770_match __P((eisa_id_t type));
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static char*
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aic7770_match(type)
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eisa_id_t type;
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{
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switch(type) {
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case EISA_DEVICE_ID_ADAPTEC_AIC7770:
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return ("Adaptec aic7770 SCSI host adapter");
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break;
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case EISA_DEVICE_ID_ADAPTEC_274x:
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return ("Adaptec 274X SCSI host adapter");
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break;
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case EISA_DEVICE_ID_ADAPTEC_284xB:
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case EISA_DEVICE_ID_ADAPTEC_284x:
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return ("Adaptec 284X SCSI host adapter");
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break;
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default:
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break;
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}
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return (NULL);
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}
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static int
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aic7770probe(void)
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{
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u_long iobase;
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char intdef;
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u_long irq;
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struct eisa_device *e_dev = NULL;
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int count;
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count = 0;
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while ((e_dev = eisa_match_dev(e_dev, aic7770_match))) {
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iobase = (e_dev->ioconf.slot * EISA_SLOT_SIZE)
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+ AHC_EISA_SLOT_OFFSET;
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ahc_reset(iobase);
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eisa_add_iospace(e_dev, iobase, AHC_EISA_IOSIZE, RESVADDR_NONE);
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intdef = inb(INTDEF + iobase);
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switch (intdef & 0xf) {
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case 9:
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irq = 9;
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break;
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case 10:
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irq = 10;
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break;
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case 11:
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irq = 11;
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break;
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case 12:
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irq = 12;
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break;
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case 14:
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irq = 14;
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break;
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case 15:
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irq = 15;
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break;
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default:
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printf("aic7770 at slot %d: illegal "
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"irq setting %d\n", e_dev->ioconf.slot,
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intdef);
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continue;
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}
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eisa_add_intr(e_dev, irq);
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eisa_registerdev(e_dev, &ahc_eisa_driver, &kdc_aic7770);
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if(e_dev->id == EISA_DEVICE_ID_ADAPTEC_284xB
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|| e_dev->id == EISA_DEVICE_ID_ADAPTEC_284x) {
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/* Our real parent is the isa bus. Say so. */
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e_dev->kdc->kdc_parent = &kdc_isa0;
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}
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count++;
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}
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return count;
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}
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static int
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aic7770_attach(e_dev)
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struct eisa_device *e_dev;
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{
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ahc_type type;
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struct ahc_data *ahc;
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resvaddr_t *iospace;
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u_long iobase;
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int unit = e_dev->unit;
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int irq = ffs(e_dev->ioconf.irq) - 1;
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iospace = e_dev->ioconf.ioaddrs.lh_first;
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if(!iospace)
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return -1;
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iobase = iospace->addr;
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switch(e_dev->id) {
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case EISA_DEVICE_ID_ADAPTEC_AIC7770:
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type = AHC_AIC7770;
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break;
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case EISA_DEVICE_ID_ADAPTEC_274x:
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type = AHC_274;
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break;
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case EISA_DEVICE_ID_ADAPTEC_284xB:
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case EISA_DEVICE_ID_ADAPTEC_284x:
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type = AHC_284;
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break;
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default:
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printf("aic7770_attach: Unknown device type!\n");
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return -1;
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break;
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}
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if(!(ahc = ahc_alloc(unit, iospace->addr, type, AHC_FNONE)))
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return -1;
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eisa_reg_start(e_dev);
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if(eisa_reg_iospace(e_dev, iospace)) {
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ahc_free(ahc);
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return -1;
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}
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/*
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* The IRQMS bit enables level sensitive interrupts only allow
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* IRQ sharing if its set.
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*/
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if(eisa_reg_intr(e_dev, irq, ahc_intr, (void *)ahc, &bio_imask,
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/*shared ==*/ahc->pause & IRQMS)) {
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ahc_free(ahc);
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return -1;
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}
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eisa_reg_end(e_dev);
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/*
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* Tell the user what type of interrupts we're using.
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* usefull for debugging irq problems
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*/
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if(bootverbose) {
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if(ahc->pause & IRQMS)
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printf("ahc%d: Using Level Sensitive "
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"Interrupts\n", unit);
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else
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printf("ahc%d: Using Edge Triggered "
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"Interrupts\n", unit);
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}
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/*
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* Now that we know we own the resources we need, do the
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* card initialization.
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*
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* First, the aic7770 card specific setup.
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*/
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switch( ahc->type ) {
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case AHC_AIC7770:
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{
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/* XXX
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* It would be really nice to know if the BIOS
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* was installed for the motherboard controllers,
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* but I don't know how to yet. Assume its enabled
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* for now.
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*/
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break;
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}
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case AHC_274:
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{
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if((inb(HA_274_BIOSCTRL + iobase) & BIOSMODE) == BIOSDISABLED)
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ahc->flags |= AHC_USEDEFAULTS;
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break;
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}
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case AHC_284:
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{
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/* XXX
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* All values are automagically intialized at
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* POST for these cards, so we can always rely
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* on the Scratch Ram values. However, we should
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* read the SEEPROM here (Dan has the code to do
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* it) so we can say what kind of translation the
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* BIOS is using. Printing out the geometry could
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* save a lot of users the grief of failed installs.
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*/
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break;
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}
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}
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/*
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* See if we have a Rev E or higher aic7770. Anything below a
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* Rev E will have a R/O autoflush disable configuration bit.
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* Its still not clear exactly what is differenent about the Rev E.
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* We think it has more QINFIFO and QOUTFIFO space to support
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* "paging" SCBs so you can have more than 4 commands active at
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* once. We may use this information later.
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*/
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{
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char *id_string;
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u_char sblkctl;
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u_char sblkctl_orig;
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sblkctl_orig = inb(SBLKCTL + iobase);
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sblkctl = sblkctl_orig ^ AUTOFLUSHDIS;
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outb(SBLKCTL + iobase, sblkctl);
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sblkctl = inb(SBLKCTL + iobase);
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if(sblkctl != sblkctl_orig)
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{
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id_string = "aic7770 >= Rev E, ";
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/*
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* Ensure autoflush is enabled
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*/
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sblkctl &= ~AUTOFLUSHDIS;
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outb(SBLKCTL + iobase, sblkctl);
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}
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else
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id_string = "aic7770 <= Rev C, ";
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printf("ahc%d: %s", unit, id_string);
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}
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/* Setup the FIFO threshold and the bus off time */
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if(ahc->flags & AHC_USEDEFAULTS) {
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outb(BUSSPD + iobase, DFTHRSH_100);
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outb(BUSTIME + iobase, BOFF_60BCLKS);
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}
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else {
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u_char hostconf = inb(HOSTCONF + iobase);
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outb(BUSSPD + iobase, hostconf & DFTHRSH);
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outb(BUSTIME + iobase, (hostconf << 2) & BOFF);
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}
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/*
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* Generic aic7xxx initialization.
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*/
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if(ahc_init(ahc)){
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ahc_free(ahc);
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/*
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* The board's IRQ line is not yet enabled so its safe
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* to release the irq.
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*/
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eisa_release_intr(e_dev, irq, ahc_intr);
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return -1;
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}
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/*
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* Enable the board's BUS drivers
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*/
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outb(BCTL + iobase, ENABLE);
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/*
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* Enable our interrupt handler.
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*/
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if(eisa_enable_intr(e_dev, irq)) {
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ahc_free(ahc);
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eisa_release_intr(e_dev, irq, ahc_intr);
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return -1;
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}
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e_dev->kdc->kdc_state = DC_BUSY; /* host adapters always busy */
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/* Attach sub-devices - always succeeds */
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ahc_attach(ahc);
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return 0;
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}
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#endif /* NEISA > 0 */
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