NetBSD/sys/arch/amiga/dev/bztzsc.c

417 lines
9.8 KiB
C

/* $NetBSD: bztzsc.c,v 1.3 1997/01/21 05:44:42 thorpej Exp $ */
/*
* Copyright (c) 1996 Ignatios Souvatzis
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product contains software written by Ignatios Souvatzis for
* the NetBSD project.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <machine/pmap.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/cc.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/isr.h>
#include <amiga/dev/sfasreg.h>
#include <amiga/dev/sfasvar.h>
#include <amiga/dev/zbusvar.h>
#include <amiga/dev/bztzscreg.h>
#include <amiga/dev/bztzscvar.h>
void bztzscattach __P((struct device *, struct device *, void *));
int bztzscmatch __P((struct device *, struct cfdata *, void *));
struct scsi_adapter bztzsc_scsiswitch = {
sfas_scsicmd,
sfas_minphys,
0, /* no lun support */
0, /* no lun support */
};
struct scsi_device bztzsc_scsidev = {
NULL, /* use default error handler */
NULL, /* do not have a start functio */
NULL, /* have no async handler */
NULL, /* Use default done routine */
};
struct cfattach bztzsc_ca = {
sizeof(struct bztzsc_softc), bztzscmatch, bztzscattach
};
struct cfdriver bztzsc_cd = {
NULL, "bztzsc", DV_DULL, NULL, 0
};
int bztzsc_intr __P((void *));
void bztzsc_set_dma_tc __P((struct sfas_softc *sc, unsigned int len));
int bztzsc_setup_dma __P((struct sfas_softc *sc, vm_offset_t ptr, int len,
int mode));
int bztzsc_build_dma_chain __P((struct sfas_softc *sc,
struct sfas_dma_chain *chain, void *p, int l));
int bztzsc_need_bump __P((struct sfas_softc *sc, vm_offset_t ptr, int len));
void bztzsc_led __P((struct sfas_softc *sc, int mode));
/*
* If we are an Phase 5 Devices Blizzard-2060 SCSI option:
*/
int
bztzscmatch(pdp, cfp, auxp)
struct device *pdp;
struct cfdata *cfp;
void *auxp;
{
struct zbus_args *zap;
volatile u_int8_t *ta;
zap = auxp;
if (zap->manid != 0x2140) /* Phase V ? */
return(0);
if (zap->prodid != 24) /* is it B2060? */
return 0;
ta = (vu_char *)(((char *)zap->va) + 0x1ff00 + 0x20);
if (badbaddr((caddr_t)ta))
return(0);
*ta = 0;
*ta = 1;
DELAY(5);
if (*ta != 1)
return(0);
return(1);
}
u_int32_t bztzsc_flags = 0;
void
bztzscattach(pdp, dp, auxp)
struct device *pdp;
struct device *dp;
void *auxp;
{
struct bztzsc_softc *sc;
struct zbus_args *zap;
bztzsc_regmap_p rp;
vu_char *fas;
zap = auxp;
fas = &((vu_char *)zap->va)[0x1ff00];
sc = (struct bztzsc_softc *)dp;
rp = &sc->sc_regmap;
rp->FAS216.sfas_tc_low = &fas[0x00];
rp->FAS216.sfas_tc_mid = &fas[0x04];
rp->FAS216.sfas_fifo = &fas[0x08];
rp->FAS216.sfas_command = &fas[0x0C];
rp->FAS216.sfas_dest_id = &fas[0x10];
rp->FAS216.sfas_timeout = &fas[0x14];
rp->FAS216.sfas_syncper = &fas[0x18];
rp->FAS216.sfas_syncoff = &fas[0x1C];
rp->FAS216.sfas_config1 = &fas[0x20];
rp->FAS216.sfas_clkconv = &fas[0x24];
rp->FAS216.sfas_test = &fas[0x28];
rp->FAS216.sfas_config2 = &fas[0x2C];
rp->FAS216.sfas_config3 = &fas[0x30];
rp->FAS216.sfas_tc_high = &fas[0x38];
rp->FAS216.sfas_fifo_bot = &fas[0x3C];
rp->hardbits = &fas[0xe0];
rp->addrport = &fas[0xf0];
sc->sc_softc.sc_fas = (sfas_regmap_p)rp;
sc->sc_softc.sc_led = bztzsc_led;
sc->sc_softc.sc_setup_dma = bztzsc_setup_dma;
sc->sc_softc.sc_build_dma_chain = bztzsc_build_dma_chain;
sc->sc_softc.sc_need_bump = bztzsc_need_bump;
sc->sc_softc.sc_clock_freq = 40; /* Phase5 SCSI all run at 40MHz */
sc->sc_softc.sc_timeout = 250; /* Set default timeout to 250ms */
sc->sc_softc.sc_config_flags = bztzsc_flags; /* for the moment */
sc->sc_softc.sc_host_id = 7; /* Should check the jumpers */
sc->sc_softc.sc_bump_sz = NBPG; /* XXX should be the VM pagesize */
sc->sc_softc.sc_bump_pa = 0x0;
sfasinitialize((struct sfas_softc *)sc);
sc->sc_softc.sc_link.adapter_softc = sc;
sc->sc_softc.sc_link.adapter_target = sc->sc_softc.sc_host_id;
sc->sc_softc.sc_link.adapter = &bztzsc_scsiswitch;
sc->sc_softc.sc_link.device = &bztzsc_scsidev;
sc->sc_softc.sc_link.openings = 1;
sc->sc_softc.sc_link.max_target = 7;
sc->sc_softc.sc_isr.isr_intr = bztzsc_intr;
sc->sc_softc.sc_isr.isr_arg = &sc->sc_softc;
sc->sc_softc.sc_isr.isr_ipl = 2;
add_isr(&sc->sc_softc.sc_isr);
/* We don't want interrupt until we're initialized! */
printf("\n");
/* attach all scsi units on us */
config_found(dp, &sc->sc_softc.sc_link, scsiprint);
}
int
bztzsc_intr(arg)
void *arg;
{
struct sfas_softc *dev = arg;
bztzsc_regmap_p rp;
int quickints;
rp = (bztzsc_regmap_p)dev->sc_fas;
if (*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING) {
quickints = 16;
do {
dev->sc_status = *rp->FAS216.sfas_status;
dev->sc_interrupt = *rp->FAS216.sfas_interrupt;
if (dev->sc_interrupt & SFAS_INT_RESELECTED) {
dev->sc_resel[0] = *rp->FAS216.sfas_fifo;
dev->sc_resel[1] = *rp->FAS216.sfas_fifo;
}
sfasintr(dev);
} while((*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING)
&& --quickints);
return(1);
}
return(0);
}
/* Set DMA transfer counter */
void
bztzsc_set_dma_tc(sc, len)
struct sfas_softc *sc;
unsigned int len;
{
*sc->sc_fas->sfas_tc_low = len; len >>= 8;
*sc->sc_fas->sfas_tc_mid = len; len >>= 8;
*sc->sc_fas->sfas_tc_high = len;
}
/* Initialize DMA for transfer */
int
bztzsc_setup_dma(sc, ptr, len, mode)
struct sfas_softc *sc;
vm_offset_t ptr;
int len;
int mode;
{
int retval;
u_int32_t d;
bztzsc_regmap_p rp;
retval = 0;
switch(mode) {
case SFAS_DMA_READ:
case SFAS_DMA_WRITE:
rp = (bztzsc_regmap_p)sc->sc_fas;
d = (u_int32_t)ptr;
d >>= 1;
if (mode == SFAS_DMA_WRITE)
d |= (1L << 31);
rp->addrport[12] = (u_int8_t)d;
__asm __volatile("nop");
d >>= 8;
rp->addrport[8] = (u_int8_t)d;
__asm __volatile("nop");
d >>= 8;
rp->addrport[4] = (u_int8_t)d;
__asm __volatile("nop");
d >>= 8;
rp->addrport[0] = (u_int8_t)d;
__asm __volatile("nop");
bztzsc_set_dma_tc(sc, len);
break;
case SFAS_DMA_CLEAR:
default:
retval = (*sc->sc_fas->sfas_tc_high << 16) |
(*sc->sc_fas->sfas_tc_mid << 8) |
*sc->sc_fas->sfas_tc_low;
bztzsc_set_dma_tc(sc, 0);
break;
}
return(retval);
}
/* Check if address and len is ok for DMA transfer */
int
bztzsc_need_bump(sc, ptr, len)
struct sfas_softc *sc;
vm_offset_t ptr;
int len;
{
int p;
p = (int)ptr & 0x03;
if (p) {
p = 4-p;
if (len < 256)
p = len;
}
return(p);
}
/* Interrupt driven routines */
/* XXX some of this is voodoo might be remnants intended for the Fastlane. */
int
bztzsc_build_dma_chain(sc, chain, p, l)
struct sfas_softc *sc;
struct sfas_dma_chain *chain;
void *p;
int l;
{
vm_offset_t pa, lastpa;
char *ptr;
int len, prelen, max_t, n;
if (l == 0)
return(0);
#define set_link(n, p, l, f)\
do { chain[n].ptr = (p); chain[n].len = (l); chain[n++].flg = (f); } while(0)
n = 0;
if (l < 512)
set_link(n, (vm_offset_t)p, l, SFAS_CHAIN_BUMP);
else if ((p >= (void *)0xFF000000)
#if defined(M68040) || defined(M68060)
&& ((mmutype == MMU_68040) && (p >= (void *)0xFFFC0000))
#endif
) {
while(l != 0) {
len = ((l > sc->sc_bump_sz) ? sc->sc_bump_sz : l);
set_link(n, (vm_offset_t)p, len, SFAS_CHAIN_BUMP);
p += len;
l -= len;
}
} else {
ptr = p;
len = l;
pa = kvtop(ptr);
prelen = ((int)ptr & 0x03);
if (prelen) {
prelen = 4-prelen;
set_link(n, (vm_offset_t)ptr, prelen, SFAS_CHAIN_BUMP);
ptr += prelen;
len -= prelen;
}
lastpa = 0;
while(len > 3) {
pa = kvtop(ptr);
max_t = NBPG - (pa & PGOFSET);
if (max_t > len)
max_t = len;
max_t &= ~3;
if (lastpa == pa)
sc->sc_chain[n-1].len += max_t;
else
set_link(n, pa, max_t, SFAS_CHAIN_DMA);
lastpa = pa+max_t;
ptr += max_t;
len -= max_t;
}
if (len)
set_link(n, (vm_offset_t)ptr, len, SFAS_CHAIN_BUMP);
}
return(n);
}
/* real one for 2060 */
void
bztzsc_led(sc, mode)
struct sfas_softc *sc;
int mode;
{
bztzsc_regmap_p rp;
rp = (bztzsc_regmap_p)sc->sc_fas;
if (mode)
*rp->hardbits = 0x00; /* Led on, Int on */
else
*rp->hardbits = 0x02; /* Led off, Int on */
}