185 lines
5.2 KiB
C
185 lines
5.2 KiB
C
/* $NetBSD: sebuf.c,v 1.17 2008/06/28 12:13:38 tsutsui Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross.
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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, 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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Sun3/E SCSI/Ethernet board. This is a VME board with some memory,
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* an Intel Ether, and an NCR5380 SCSI with a cheap DMA engine.
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* Note that the SCSI DMA engine can ONLY access the memory on
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* the SE board, NOT the main memory, because it can not master
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* VME transfers.
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*
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* This driver ("sebuf") is the parent of two child drivers:
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* se: yet another variant of NCR 5380 SCSI H/W
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* ie: yet anotehr variant of Intel 82586 Ethernet
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*
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* The job of this parent is to map the memory and partition it for
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* the two children. This driver has no device nodes.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sebuf.c,v 1.17 2008/06/28 12:13:38 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/ioctl.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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#include <uvm/uvm_extern.h>
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#include <machine/autoconf.h>
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#include <machine/cpu.h>
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#include "sereg.h"
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#include "sevar.h"
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struct sebuf_softc {
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device_t sc_dev; /* base device (required) */
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struct sebuf_regs *sc_regs;
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};
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/*
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* Autoconfig attachment
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*/
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static int sebuf_match(device_t, cfdata_t, void *);
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static void sebuf_attach(device_t, device_t, void *);
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static int sebuf_print(void *, const char *);
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CFATTACH_DECL_NEW(sebuf, sizeof(struct sebuf_softc),
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sebuf_match, sebuf_attach, NULL, NULL);
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static int
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sebuf_match(device_t parent, cfdata_t cf, void *args)
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{
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struct confargs *ca = args;
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struct se_regs *sreg;
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struct ie_regs *ereg;
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int pa, x;
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if (ca->ca_paddr == -1)
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return 0;
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/* Is it there at all? */
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pa = ca->ca_paddr;
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x = bus_peek(ca->ca_bustype, pa, 2);
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if (x == -1)
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return 0;
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/* Look at the CSR for the SCSI part. */
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pa = ca->ca_paddr + offsetof(struct sebuf_regs, se_scsi_regs);
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sreg = bus_tmapin(ca->ca_bustype, pa);
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/* Write some bits that are wired to zero. */
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sreg->se_csr = 0xFFF3;
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x = peek_word((void *)(&sreg->se_csr));
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bus_tmapout(sreg);
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if ((x == -1) || (x & 0xFCF0)) {
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#ifdef DEBUG
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aprint_debug("%s: SCSI csr=0x%x\n", __func__, x);
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#endif
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return 0;
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}
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/* Look at the CSR for the Ethernet part. */
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pa = ca->ca_paddr + offsetof(struct sebuf_regs, se_eth_regs);
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ereg = bus_tmapin(ca->ca_bustype, pa);
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/* Write some bits that are wired to zero. */
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ereg->ie_csr = 0x0FFF;
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x = peek_word((void *)(&ereg->ie_csr));
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bus_tmapout(ereg);
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if ((x == -1) || (x & 0xFFF)) {
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#ifdef DEBUG
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printf("%s: Ether csr=0x%x\n", __func__, x);
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#endif
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return 0;
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}
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/* Default interrupt priority always splbio==2 */
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if (ca->ca_intpri == -1)
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ca->ca_intpri = 2;
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return 1;
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}
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static void
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sebuf_attach(device_t parent, device_t self, void *args)
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{
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struct sebuf_softc *sc = device_private(self);
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struct confargs *ca = args;
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struct sebuf_attach_args aa;
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struct sebuf_regs *regs;
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sc->sc_dev = self;
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aprint_normal("\n");
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if (ca->ca_intpri != 2)
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panic("sebuf: bad level");
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/* Map in the whole board. */
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regs = (struct sebuf_regs *)bus_mapin(ca->ca_bustype, ca->ca_paddr,
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sizeof(struct sebuf_regs));
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if (regs == NULL)
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panic("%s", __func__);
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sc->sc_regs = regs;
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/* Attach the SCSI child. */
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aa.ca = *ca; /* structure copy */
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aa.ca.ca_paddr = 0; /* prevent misuse */
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aa.name = "se";
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aa.buf = ®s->se_scsi_buf[0];
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aa.blen = SE_NCRBUFSIZE;
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aa.regs = ®s->se_scsi_regs;
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(void)config_found(self, (void *)&aa, sebuf_print);
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/* Attach the Ethernet child. */
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aa.ca.ca_intpri++;
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aa.ca.ca_intvec++;
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aa.name = "ie";
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aa.buf = ®s->se_eth_buf[0];
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aa.blen = SE_IEBUFSIZE;
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aa.regs = ®s->se_eth_regs;
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(void)config_found(self, (void *)&aa, sebuf_print);
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}
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static int
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sebuf_print(void *aux, const char *name)
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{
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if (name != NULL)
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aprint_normal("%s: ", name);
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return UNCONF;
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}
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