205 lines
6.2 KiB
C
205 lines
6.2 KiB
C
/* $NetBSD: sc_mbmem.c,v 1.14 2009/11/21 04:16:52 rmind Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1996 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Adam Glass, David Jones, Gordon W. Ross, and Matthew Fredette.
|
|
*
|
|
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
*/
|
|
|
|
/*
|
|
* This file contains only the machine-dependent parts of the
|
|
* Sun-2 SCSI driver. (Autoconfig stuff and DMA functions.)
|
|
* The machine-independent parts are in sunscpal.c
|
|
*
|
|
* Supported hardware includes:
|
|
* Sun SCSI-2 on Multibus (Sun2/120,Sun2/170)
|
|
* Sun SCSI-2 on VME (Sun2/50,Sun3/160,Sun3/260,others?)
|
|
*
|
|
* Credits, history:
|
|
*
|
|
* Matthew Fredette took revision 1.15 of si_vme.c, and then heavily
|
|
* modified it to support the Sun sc. The remaining credits
|
|
* are from si_vme.c:
|
|
*
|
|
* David Jones wrote the initial version of this module, which
|
|
* included support for the VME adapter only. (no reselection).
|
|
*
|
|
* Gordon Ross added support for the OBIO adapter, and re-worked
|
|
* both the VME and OBIO code to support disconnect/reselect.
|
|
* (Required figuring out the hardware "features" noted above.)
|
|
*
|
|
* The autoconfiguration boilerplate came from Adam Glass.
|
|
*/
|
|
|
|
/*****************************************************************
|
|
* Multibus functions for sc
|
|
****************************************************************/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: sc_mbmem.c,v 1.14 2009/11/21 04:16:52 rmind Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/device.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <dev/scsipi/scsi_all.h>
|
|
#include <dev/scsipi/scsipi_all.h>
|
|
#include <dev/scsipi/scsipi_debug.h>
|
|
#include <dev/scsipi/scsiconf.h>
|
|
|
|
#include <machine/autoconf.h>
|
|
#include <machine/bus.h>
|
|
|
|
/* #define DEBUG XXX */
|
|
|
|
#include <dev/ic/sunscpalreg.h>
|
|
#include <dev/ic/sunscpalvar.h>
|
|
|
|
/* Yes, we use a VME header file. */
|
|
#include <dev/vme/screg.h>
|
|
|
|
/*
|
|
* Transfers smaller than this are done using PIO
|
|
* (on assumption they're not worth DMA overhead)
|
|
*/
|
|
#define MIN_DMA_LEN 128
|
|
|
|
/*
|
|
* New-style autoconfig attachment
|
|
*/
|
|
|
|
static int sunsc_mbmem_match(device_t, cfdata_t, void *);
|
|
static void sunsc_mbmem_attach(device_t, device_t, void *);
|
|
static int sunsc_mbmem_intr(void *);
|
|
|
|
CFATTACH_DECL_NEW(sc_mbmem, sizeof(struct sunscpal_softc),
|
|
sunsc_mbmem_match, sunsc_mbmem_attach, NULL, NULL);
|
|
|
|
/*
|
|
* Options for parity, DMA, and interrupts.
|
|
*/
|
|
int sunsc_mbmem_options = 0x00;
|
|
|
|
static int
|
|
sunsc_mbmem_match(device_t parent, cfdata_t cf, void *aux)
|
|
{
|
|
struct mbmem_attach_args *mbma = aux;
|
|
bus_space_handle_t bh;
|
|
bool matched;
|
|
|
|
/* No default Multibus address. */
|
|
if (mbma->mbma_paddr == -1)
|
|
return 0;
|
|
|
|
/* Make sure there is something there... */
|
|
if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ,
|
|
0, &bh))
|
|
return 0;
|
|
matched =
|
|
(bus_space_peek_2(mbma->mbma_bustag, bh, SCREG_ICR, NULL) == 0);
|
|
bus_space_unmap(mbma->mbma_bustag, bh, SCREG_BANK_SZ);
|
|
if (!matched)
|
|
return 0;
|
|
|
|
/* Default interrupt priority. */
|
|
if (mbma->mbma_pri == -1)
|
|
mbma->mbma_pri = 2;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
sunsc_mbmem_attach(device_t parent, device_t self, void *args)
|
|
{
|
|
struct sunscpal_softc *sc = device_private(self);
|
|
struct cfdata *cf = device_cfdata(self);
|
|
struct mbmem_attach_args *mbma = args;
|
|
int i;
|
|
|
|
sc->sc_dev = self;
|
|
|
|
/* Map in the device. */
|
|
sc->sunscpal_regt = mbma->mbma_bustag;
|
|
sc->sunscpal_dmat = mbma->mbma_dmatag;
|
|
if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ,
|
|
0, &sc->sunscpal_regh))
|
|
panic("%s: can't map", __func__);
|
|
|
|
/* Device register offsets. */
|
|
sc->sunscpal_data = SCREG_DATA;
|
|
sc->sunscpal_cmd_stat = SCREG_CMD_STAT;
|
|
sc->sunscpal_icr = SCREG_ICR;
|
|
sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H;
|
|
sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L;
|
|
sc->sunscpal_dma_count = SCREG_DMA_COUNT;
|
|
sc->sunscpal_intvec = SCREG_INTVEC;
|
|
|
|
/* Allocate DMA handles. */
|
|
i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle);
|
|
sc->sc_dma_handles = malloc(i, M_DEVBUF, M_WAITOK);
|
|
if (sc->sc_dma_handles == NULL)
|
|
panic("sc: DMA handles malloc failed");
|
|
for (i = 0; i < SUNSCPAL_OPENINGS; i++)
|
|
if (bus_dmamap_create(sc->sunscpal_dmat, SUNSCPAL_MAX_DMA_LEN,
|
|
1, SUNSCPAL_MAX_DMA_LEN,
|
|
0, BUS_DMA_WAITOK, &sc->sc_dma_handles[i].dh_dmamap) != 0)
|
|
panic("sc: DMA map create failed");
|
|
|
|
/* Miscellaneous. */
|
|
sc->sc_min_dma_len = MIN_DMA_LEN;
|
|
sc->sc_rev = SUNSCPAL_VARIANT_501_1006;
|
|
|
|
/* Attach interrupt handler. */
|
|
bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_BIO, 0,
|
|
sunsc_mbmem_intr, sc);
|
|
|
|
/* Do the common attach stuff. */
|
|
sunscpal_attach(sc, cf->cf_flags ? cf->cf_flags : sunsc_mbmem_options);
|
|
}
|
|
|
|
static int
|
|
sunsc_mbmem_intr(void *arg)
|
|
{
|
|
struct sunscpal_softc *sc = arg;
|
|
int claimed;
|
|
|
|
claimed = sunscpal_intr(sc);
|
|
#ifdef DEBUG
|
|
if (claimed == 0) {
|
|
printf("%s: spurious from SBC\n", __func__);
|
|
}
|
|
#endif
|
|
/* Yes, we DID cause this interrupt. */
|
|
claimed = 1;
|
|
|
|
return claimed;
|
|
}
|