155 lines
4.5 KiB
C
155 lines
4.5 KiB
C
/* $NetBSD: xbox.c,v 1.17 2009/03/18 16:00:20 cegger Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Paul Kranenburg.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Sbus expansion box.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: xbox.c,v 1.17 2009/03/18 16:00:20 cegger Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <sys/bus.h>
|
|
#include <dev/sbus/sbusvar.h>
|
|
#include <dev/sbus/xboxvar.h>
|
|
#include <machine/autoconf.h>
|
|
|
|
/*
|
|
* Xbox registers definitions.
|
|
*
|
|
* The xbox device can operate in two mode: "opaque" and "transparent".
|
|
* In opaque mode, all accesses to the xbox address space are directed
|
|
* to the xbox itself. In transparent mode, all accesses are mapped to
|
|
* the SBus cards in the expansion box.
|
|
*
|
|
* To access the xbox registers in transparent mode, you must write
|
|
* to the "write0" register. The layout of this register appears to
|
|
* be as follows:
|
|
*
|
|
* bit 31-24: xbox key (identifies device when you cascade them)
|
|
* bit 23-12: offset of register to access
|
|
* bit 11-0: value to write
|
|
*
|
|
* For instance, to switch to opaque mode:
|
|
* (*sc->write0_reg) = (sc->sc_key << 24) | XAC_CTL1_OFFSET;
|
|
*
|
|
* (note we're not currently using any of this)
|
|
*/
|
|
#define WRITE0_OFFSET 0
|
|
|
|
#define XAC_ERR_OFFSET 0x2000
|
|
#define XAC_CTL0_OFFSET 0x10000
|
|
#define XAC_CTL1_OFFSET 0x11000
|
|
#define XAC_ELUA_OFFSET 0x12000
|
|
#define XAC_ELLA_OFFSET 0x13000
|
|
#define XAC_ELE_OFFSET 0x14000
|
|
|
|
#define XBC_ERR_OFFSET 0x42000
|
|
#define XBC_CTL0_OFFSET 0x50000
|
|
#define XBC_CTL1_OFFSET 0x51000
|
|
#define XBC_ELUA_OFFSET 0x52000
|
|
#define XBC_ELLA_OFFSET 0x53000
|
|
#define XBC_ELE_OFFSET 0x54000
|
|
|
|
#define XBOX_NREG 13
|
|
|
|
struct xbox_softc {
|
|
struct device sc_dev; /* base device */
|
|
int sc_key; /* this xbox's unique key */
|
|
};
|
|
|
|
/* autoconfiguration driver */
|
|
int xbox_match(struct device *, struct cfdata *, void *);
|
|
void xbox_attach(struct device *, struct device *, void *);
|
|
int xbox_print( void *, const char *);
|
|
|
|
CFATTACH_DECL(xbox, sizeof(struct xbox_softc),
|
|
xbox_match, xbox_attach, NULL, NULL);
|
|
|
|
int
|
|
xbox_print(void *args, const char *busname)
|
|
{
|
|
struct xbox_attach_args *xa = args;
|
|
|
|
if (busname)
|
|
aprint_normal("%s at %s", xa->xa_name, busname);
|
|
return (UNCONF);
|
|
}
|
|
|
|
int
|
|
xbox_match(struct device *parent, struct cfdata *cf, void *aux)
|
|
{
|
|
struct sbus_attach_args *sa = aux;
|
|
|
|
return (strcmp("SUNW,xbox", sa->sa_name) == 0);
|
|
}
|
|
|
|
/*
|
|
* Attach an Xbox.
|
|
*/
|
|
void
|
|
xbox_attach(struct device *parent, struct device *self, void *aux)
|
|
{
|
|
struct xbox_softc *sc = (struct xbox_softc *)self;
|
|
struct sbus_attach_args *sa = aux;
|
|
int node = sa->sa_node;
|
|
struct xbox_attach_args xa;
|
|
char *cp;
|
|
|
|
sc->sc_key = prom_getpropint(node, "write0-key", -1);
|
|
|
|
cp = prom_getpropstring(node, "model");
|
|
printf(": model %s", cp);
|
|
|
|
cp = prom_getpropstring(node, "child-present");
|
|
if (strcmp(cp, "true") != 0) {
|
|
printf(": no sbus devices\n");
|
|
return;
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
/*
|
|
* Now pretend to be another Sbus.
|
|
*/
|
|
memset(&xa, 0, sizeof xa);
|
|
xa.xa_name = "sbus";
|
|
xa.xa_node = node;
|
|
xa.xa_bustag = sa->sa_bustag;
|
|
xa.xa_dmatag = sa->sa_dmatag;
|
|
|
|
(void) config_found(&sc->sc_dev, (void *)&xa, xbox_print);
|
|
}
|