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/* $OpenBSD: sbicdma.c,v 1.12 2004/09/29 19:17:40 miod Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
* Copyright (c) 1995 Dale Rahn. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* as you may guess by some of the routines in this file,
* dma is not yet working. - its on the TODO list
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <uvm/uvm_extern.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <machine/autoconf.h>
#include <mvme68k/dev/pccreg.h>
#include <mvme68k/dev/sbicreg.h>
#include <mvme68k/dev/sbicvar.h>
#include <mvme68k/dev/dmavar.h>
void sbicdmaattach(struct device *, struct device *, void *);
int sbicdmamatch(struct device *, void *, void *);
int sbicdmaprint(void *auxp, const char *);
void sbicdma_dmafree(struct sbic_softc *);
void sbicdma_dmastop(struct sbic_softc *);
int sbicdma_dmanext(struct sbic_softc *);
int sbicdma_dmago(struct sbic_softc *, char *, int, int);
int sbicdma_dmaintr(struct sbic_softc *);
int sbicdma_scintr(struct sbic_softc *);
struct scsi_adapter sbicdma_scsiswitch = {
sbic_scsicmd,
sbic_minphys,
0, /* no lun support */
0, /* no lun support */
};
struct scsi_device sbicdma_scsidev = {
NULL, /* use default error handler */
NULL, /* have a queue served by this ??? */
NULL, /* have no async handler ??? */
NULL, /* Use default done routine */
};
#ifdef DEBUG
int sbicdma_debug = 1;
#endif
int sbicdma_maxdma = 0; /* Maximum size per DMA transfer */
int sbicdma_dmamask = 0;
int sbicdma_dmabounce = 0;
struct cfdriver sbiccd = {
NULL, "sbic", sbicdmamatch, sbicdmaattach,
DV_DULL, sizeof(struct sbic_softc),
};
int
sbicdmamatch(parent, vcf, args)
struct device *parent;
void *vcf, *args;
{
/*
* XXX finish to properly probe
*/
return (1);
}
void
sbicdmaattach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct sbic_softc *sc = (struct sbic_softc *)self;
struct confargs *ca = args;
sc->sc_dmafree = sbicdma_dmafree;
sc->sc_dmago = sbicdma_dmago;
sc->sc_dmanext = sbicdma_dmanext;
sc->sc_dmastop = sbicdma_dmastop;
sc->sc_dmacmd = 0;
sc->sc_flags |= SBICF_BADDMA;
sc->sc_dmamask = 0;
sc->sc_sbicp = (sbic_regmap_p)ca->ca_vaddr;
sc->sc_clkfreq = 100;
sc->sc_link.adapter_softc = sc;
sc->sc_link.adapter_target = 7;
sc->sc_link.adapter = &sbicdma_scsiswitch;
sc->sc_link.device = &sbicdma_scsidev;
sc->sc_link.openings = 1;
printf(": target %d\n", sc->sc_link.adapter_target);
/* connect the interrupts */
sc->sc_ih.ih_fn = sbicdma_scintr;
sc->sc_ih.ih_arg = sc;
sc->sc_ih.ih_ipl = ca->ca_ipl;
pccintr_establish(PCCV_SBIC, &sc->sc_ih, self->dv_xname);
sc->sc_dmaih.ih_fn = sbicdma_dmaintr;
sc->sc_dmaih.ih_arg = sc;
sc->sc_dmaih.ih_ipl = ca->ca_ipl;
pccintr_establish(PCCV_DMA, &sc->sc_dmaih, self->dv_xname);
sys_pcc->pcc_dmairq = sc->sc_dmaih.ih_ipl | PCC_IRQ_INT;
sys_pcc->pcc_sbicirq = sc->sc_ih.ih_ipl | PCC_SBIC_RESETIRQ;
sbicreset(sc);
config_found(self, &sc->sc_link, sbicdmaprint);
}
/*
* print diag if pnp is NULL else just extra
*/
int
sbicdmaprint(auxp, pnp)
void *auxp;
const char *pnp;
{
if (pnp == NULL)
return (UNCONF);
return (QUIET);
}
int
sbicdma_dmago(sc, va, count, flags)
struct sbic_softc *sc;
char *va;
int count, flags;
{
u_char csr;
u_long pa;
pmap_extract(pmap_kernel(), (vm_offset_t)va, &pa);
#ifdef DEBUG
if (sbicdma_debug)
printf("%s: dmago: va 0x%x pa 0x%x cnt %d flags %x\n",
sc->sc_dev.dv_xname, va, pa, count, flags);
#endif
sc->sc_flags |= SBICF_INTR;
sys_pcc->pcc_dmadaddr = (u_long)pa;
if (count & PCC_DMABCNT_CNTMASK) {
printf("%s: dma count 0x%x too large\n",
sc->sc_dev.dv_xname, count);
return (0);
}
sys_pcc->pcc_dmabcnt = (PCC_DMABCNT_MAKEFC(FC_USERD)) |
(count & PCC_DMABCNT_CNTMASK);
/* make certain interrupts are disabled first, and reset */
sys_pcc->pcc_dmairq = sc->sc_dmaih.ih_ipl | PCC_IRQ_IEN | PCC_IRQ_INT;
sys_pcc->pcc_sbicirq = sc->sc_ih.ih_ipl | PCC_SBIC_RESETIRQ | PCC_IRQ_IEN;
sys_pcc->pcc_dmacsr = 0;
sys_pcc->pcc_dmacsr = PCC_DMACSR_DEN |
((flags & DMAGO_READ) == 0) ? PCC_DMACSR_TOSCSI : 0;
return (sc->sc_tcnt);
}
int
sbicdma_dmaintr(sc)
struct sbic_softc *sc;
{
u_char stat;
int ret = 0;
/* DMA done */
stat = sys_pcc->pcc_dmacsr;
#ifdef DEBUG
printf("dmaintr%d ", stat);
#endif
if (stat & PCC_DMACSR_DONE) {
sys_pcc->pcc_dmacsr = 0;
sys_pcc->pcc_dmairq = 0; /* ack and remove intr */
if (stat & PCC_DMACSR_ERR8BIT) {
printf("%s: 8 bit error\n", sc->sc_dev.dv_xname);
}
if (stat & PCC_DMACSR_DMAERRDATA) {
printf("%s: DMA bus error\n", sc->sc_dev.dv_xname);
}
return (1);
}
return (0);
}
int
sbicdma_scintr(sc)
struct sbic_softc *sc;
{
u_char stat;
int ret = 0;
#ifdef DEBUG
printf("scintr%d ", stat);
#endif
stat = sys_pcc->pcc_sbicirq;
if (stat & PCC_SBIC_RESETIRQ) {
printf("%s: scintr: a scsi device pulled reset\n",
sc->sc_dev.dv_xname);
sys_pcc->pcc_sbicirq = sys_pcc->pcc_sbicirq | PCC_SBIC_RESETIRQ;
} else if (stat & PCC_IRQ_INT) {
sys_pcc->pcc_sbicirq = 0;
sbicintr(sc);
ret = 1;
}
return (ret);
}
void
sbicdma_dmastop(sc)
struct sbic_softc *sc;
{
#ifdef DEBUG
printf("sbicdma_dmastop called\n");
#endif
/* XXX do nothing */
}
int
sbicdma_dmanext(sc)
struct sbic_softc *sc;
{
#ifdef DEBUG
printf("sbicdma_dmanext called\n");
#endif
}
void
sbicdma_dmafree(sc)
struct sbic_softc *sc;
{
#ifdef DEBUG
printf("sbicdma_dmafree called\n");
#endif
/* make certain interrupts are disabled first, reset */
sys_pcc->pcc_dmairq = 0;
}
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