180 lines
4.3 KiB
C
180 lines
4.3 KiB
C
/* $NetBSD: iomd.c,v 1.6 1997/01/28 04:08:21 mark Exp $ */
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/*
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* Copyright (c) 1996 Mark Brinicombe.
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Mark Brinicombe.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* RiscBSD kernel project
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*
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* iomd.c
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*
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* Probing and configuration for the IOMD
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*
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* Created : 10/10/95
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <machine/io.h>
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#include <machine/katelib.h>
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#include <machine/cpu.h>
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#include <machine/iomd.h>
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#include "iomd.h"
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#if NIOMD != 1
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#error Need at 1 IOMD device configured
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#endif
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int iomdmatch __P((struct device *parent, void *match, void *aux));
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void iomdattach __P((struct device *parent, struct device *self, void *aux));
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/* Declare prototypes */
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/*
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* int iomdmatch(struct device *parent, void *match, void *aux)
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*
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* Just return ok for this.
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*/
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int
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iomdmatch(parent, match, aux)
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struct device *parent;
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void *match;
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void *aux;
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{
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struct device *dev = match;
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if (dev->dv_unit == 0)
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return(1);
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return(0);
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}
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/*
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* void iomdattach(struct device *parent, struct device *dev, void *aux)
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*
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* Identify the IOMD
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*/
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void
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iomdattach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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int id;
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int refresh;
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int dma_time;
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int combo_time;
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int loop;
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id = IOMD_ID;
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printf(": ");
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switch (id) {
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#ifdef CPU_ARM7500
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case ARM7500_IOC_ID:
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printf("ARM7500 IOMD ");
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refresh = ReadByte(IOMD_REFCR) & 0x0f;
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break;
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#else
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case RPC600_IOMD_ID:
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printf("RPC IOMD ");
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refresh = ReadByte(IOMD_VREFCR) & 0x09;
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break;
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#endif /* CPU_ARM7500 */
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default:
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printf("Unknown IOMD=%04x ", id);
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refresh = 0;
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break;
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}
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printf("\n");
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printf("%s: ", self->dv_xname);
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printf("DRAM refresh=");
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switch(refresh){
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case 0x0:
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printf("off");
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break;
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case 0x1:
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printf("16us");
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break;
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case 0x2:
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printf("32us");
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break;
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case 0x4:
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printf("64us");
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break;
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case 0x8:
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printf("128us");
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break;
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default:
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printf("unknown [%02x]", refresh);
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break;
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}
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dma_time = ReadByte(IOMD_DMATCR);
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printf(", dma cycle types=");
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for (loop = 0; loop < 4; ++loop,dma_time = dma_time >> 2)
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printf("%c", 'A' + (dma_time & 3));
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combo_time = ReadByte(IOMD_IOTCR);
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printf(", combo cycle type=%c", 'A' + ((combo_time >> 2) & 3));
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printf("\n");
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switch (id) {
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#ifdef CPU_ARM7500
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case ARM7500_IOC_ID:
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break;
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#else
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case RPC600_IOMD_ID:
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/* DMA channels 2 & 3 are external */
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WriteByte(IOMD_DMAEXT, 0x0c);
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break;
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#endif /* CPU_ARM7500 */
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}
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}
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struct cfattach iomd_ca = {
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sizeof(struct device), iomdmatch, iomdattach
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};
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struct cfdriver iomd_cd = {
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NULL, "iomd", DV_DULL, 1
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};
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/* End of iomd.c */
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