NetBSD/sys/arch/arm/iomd/vidc20.c

154 lines
4.1 KiB
C

/* $NetBSD: vidc20.c,v 1.4 2002/06/16 13:25:02 bjh21 Exp $ */
/*
* Copyright (c) 1997 Mark Brinicombe
* Copyright (c) 1997 Causality Limited
* 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 includes software developed by Mark Brinicombe
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* 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 AUTHORS 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.
*
* RiscBSD kernel project
*
* vidc20.c
*
* VIDC20 driver
*
* Created : 22/02/97
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <arm/iomd/vidc.h>
#include <machine/io.h>
#include <arm/iomd/iomdreg.h>
#include <arm/iomd/iomdvar.h>
#include <arm/mainbus/mainbus.h>
#include "locators.h"
struct vidc20_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
};
static int vidcmatch(struct device *, struct cfdata *, void *);
static void vidcattach(struct device *, struct device *, void *);
static int vidcsearch(struct device *, struct cfdata *, void *);
/*
* vidc_base gives the base of the VIDC chip in memory; this is for
* the rest isnt busspaceified yet. Initialised with VIDC_BASE for
* backwards compatibility.
*/
int *vidc_base = (int *)VIDC_BASE;
/*
* vidc_fref is the reference frequency in Mhz of the detected VIDC
* (dependent on IOMD/IOC)
* XXX default is RPC600 ?
*/
int vidc_fref = 24000000;
struct cfattach vidc_ca = {
sizeof (struct vidc20_softc), vidcmatch, vidcattach
};
/*
* vidcmatch()
*
* VIDC20 is a write only device so we cannot probe it
* We must assume things are ok.
*/
static int
vidcmatch(struct device *parent, struct cfdata *cf, void *aux)
{
return(1);
}
/*
* vidcsearch()
*
* search routine used during the config of children
*/
static int
vidcsearch(struct device *parent, struct cfdata *cf, void *aux)
{
if ((*cf->cf_attach->ca_match)(parent, cf, NULL) > 0)
config_attach(parent, cf, NULL, NULL);
return (0);
}
/*
* vidcattach()
*
* Configure all the child devices of the VIDC
*/
static void
vidcattach(struct device *parent, struct device *self, void *aux)
{
struct vidc20_softc *sc = (struct vidc20_softc *)self;
struct mainbus_attach_args *mb = aux;
sc->sc_iot = mb->mb_iot;
/*
* Since the VIDC is write-only, infer the type of VIDC from the
* type of IOMD.
*/
switch (IOMD_ID) {
case ARM7500_IOC_ID:
printf(": ARM7500 video and sound macrocell\n");
vidc_fref = 32000000;
break;
case ARM7500FE_IOC_ID:
printf(": ARM7500FE video and sound macrocell\n");
vidc_fref = 32000000;
break;
default: /* XXX default? */
case RPC600_IOMD_ID:
printf(": VIDC20\n");
vidc_fref = 24000000;
break;
};
config_search(vidcsearch, self, NULL);
}
/* End of vidc20.c */