NetBSD/sys/arch/pmax/dev/sii_ds.c

246 lines
5.6 KiB
C

/* $NetBSD: sii_ds.c,v 1.8 1999/04/24 08:01:08 simonb Exp $ */
/*
* Copyright 1996 The Board of Trustees of The Leland Stanford
* Junior University. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. Stanford University
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*
* this driver contributed by Jonathan Stone
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/device.h>
#include <sys/tty.h>
#include <machine/autoconf.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <pmax/dev/device.h> /* XXX old pmax SCSI drivers */
#include <pmax/dev/siireg.h>
#include <pmax/dev/siivar.h>
#include <pmax/ibus/ibusvar.h> /* interrupt etablish */
#include <pmax/pmax/kn01.h> /* kn01 (ds3100) address constants */
#include <pmax/pmax/pmaxtype.h>
/*
* Autoconfig definition of driver front-end
*/
int sii_ds_match __P((struct device* parent, struct cfdata *match,
void *aux));
void sii_ds_attach __P((struct device *parent, struct device *self, void *aux));
extern struct cfattach sii_ds_ca;
struct cfattach sii_ds_ca = {
sizeof(struct siisoftc), sii_ds_match, sii_ds_attach
};
extern void CopyToBuffer __P((u_short *src, /* NB: must be short aligned */
volatile u_short *dst, int length));
extern void CopyFromBuffer __P((volatile u_short *src, char *dst, int length));
void kn230_copytobuf __P((u_short *src, /* NB: must be short aligned */
volatile u_short *dst, int length));
void kn230_copyfrombuf __P((volatile u_short *src, char *dst, int length));
void kn01_copytobuf __P((u_short *src, /* NB: must be short aligned */
volatile u_short *dst, int length));
void kn01_copyfrombuf __P((volatile u_short *src, char *dst, int length));
/* define a safe address in the SCSI buffer for doing status & message DMA */
#define SII_BUF_ADDR (MIPS_PHYS_TO_KSEG1(KN01_SYS_SII_B_START) \
+ SII_MAX_DMA_XFER_LENGTH * 14)
/*
* Match driver on Decstation (2100, 3100, 5100) based on name and probe.
*/
int
sii_ds_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct ibus_attach_args *ia = aux;
void * siiaddr;
if (strcmp(ia->ia_name, "sii") != 0)
return (0);
siiaddr = (void *)ia->ia_addr;
if (badaddr(siiaddr, 4))
return (0);
return (1);
}
void
sii_ds_attach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct ibus_attach_args *ia = aux;
struct siisoftc *sc = (struct siisoftc *) self;
sc->sc_regs = (SIIRegs *)MIPS_PHYS_TO_KSEG1(ia->ia_addr);
/* set up scsi buffer. XXX Why statically allocated? */
sc->sc_buf = (void*)(MIPS_PHYS_TO_KSEG1(KN01_SYS_SII_B_START));
if (systype == DS_PMAX) {
#if 0
sc->sii_copytobuf = CopyToBuffer;
sc->sii_copyfrombuf = CopyFromBuffer;
#else
sc->sii_copytobuf = kn01_copytobuf;
sc->sii_copyfrombuf = kn01_copyfrombuf;
#endif
} else {
sc->sii_copytobuf = kn230_copytobuf;
sc->sii_copyfrombuf = kn230_copyfrombuf;
}
siiattach(sc);
/* tie pseudo-slot to device */
ibus_intr_establish((void*)ia->ia_cookie, IPL_BIO, siiintr, sc);
printf("\n");
}
/*
* Padded DMA copy functions
*
*/
/*
* XXX assumes src is always 32-bit aligned.
* currently safe on sii driver, but API and casts should be changed.
*/
void
kn230_copytobuf(src, dst, len)
u_short *src;
volatile u_short *dst;
int len;
{
u_int *wsrc = (u_int *)src;
volatile register u_int *wdst = (volatile u_int *)dst;
int i, n;
#if defined(DIAGNOSTIC) || defined(DEBUG)
if ((u_int)(src) & 0x3) {
printf("kn230: copytobuf, src %p misaligned\n", src);
}
if ((u_int)(dst) & 0x3) {
printf("kn230: copytobuf, dst %p misaligned\n", dst);
}
#endif
/* DMA buffer is allocated in 32-bit words, so just copy words. */
n = len / 4;
if (len & 0x3)
n++;
for (i = 0; i < n; i++) {
*wdst = *wsrc;
wsrc++;
wdst+= 2;
}
wbflush(); /* XXX not necessary? */
}
/*
* XXX assumes dst is always 32-bit aligned.
* currently safe on sii driver, but API and casts should be changed.
*/
void
kn230_copyfrombuf(src, dst, len)
volatile u_short *src;
char *dst; /* XXX assume 32-bit aligned? */
int len;
{
volatile register u_int *wsrc = (volatile u_int *)src;
u_int *wdst = (u_int *)dst;
int i, n;
#if defined(DIAGNOSTIC) || defined(DEBUG)
if ((u_int)(src) & 0x3) {
printf("kn230: copyfrombuf, src %p misaligned\n", src);
}
if ((u_int)(dst) & 0x3) {
printf("kn230: copyfrombuf, dst %p misaligned\n", dst);
}
#endif
n = len / 4;
for (i = 0; i < n; i++) {
*wdst = *wsrc;
wsrc += 2;
wdst++;
}
if (len & 0x3) {
u_int lastword = *wsrc;
if (len & 0x2)
*((u_short*)(wdst)) = (u_short) (lastword);
if (len & 0x1)
((u_char*)(wdst))[2] = (u_char) (lastword >> 16);
}
wbflush(); /* XXX not necessary? */
}
void
kn01_copytobuf(src, dst, len)
u_short *src;
volatile u_short *dst;
int len;
{
#if defined(DIAGNOSTIC) || defined(DEBUG)
if ((u_int)(src) & 0x3) {
printf("kn01: copytobuf, src %p misaligned\n", src);
}
if ((u_int)(dst) & 0x3) {
printf("kn01: copytobuf, dst %p misaligned\n", dst);
}
#endif
CopyToBuffer(src, dst, len);
}
void
kn01_copyfrombuf(src, dst, len)
volatile u_short *src;
char *dst; /* XXX assume 32-bit aligned? */
int len;
{
#if defined(DIAGNOSTIC) || defined(DEBUG)
if ((u_int)(src) & 0x3) {
printf("kn01: copyfrombuf, src %p misaligned\n", src);
}
if ((u_int)(dst) & 0x3) {
printf("kn01: copyfrombuf, dst %p misaligned\n", dst);
}
#endif
CopyFromBuffer(src, dst, len);
}