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/* $FreeBSD$ */
/* $NetBSD: gbus.c,v 1.8 1998/05/13 22:13:35 thorpej Exp $ */
/*
* Copyright (c) 1997, 2000 by Matthew Jacob
* NASA AMES Research Center.
* 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 immediately at the beginning of the file, without modification,
* 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 AUTHOR 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 AUTHOR 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.
*/
/*
* Autoconfiguration and support routines for the Gbus: the internal
* bus on AlphaServer CPU modules.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/rpb.h>
#include <machine/pte.h>
#include <alpha/tlsb/gbusreg.h>
#include <alpha/tlsb/gbusvar.h>
#include <alpha/tlsb/tlsbreg.h>
#include <alpha/tlsb/tlsbvar.h>
extern int cputype;
#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
/*
* The structure used to attach devices to the Gbus.
*/
struct gbus_device {
const char* gd_name;
int gd_offset;
};
#define DEVTOGBUS(dev) ((struct gbus_device*) device_get_ivars(dev))
struct gbus_device gbus_children[] = {
{ "zsc", GBUS_DUART0_OFFSET },
{ "mcclock", GBUS_CLOCK_OFFSET },
{ NULL, 0 },
};
static devclass_t gbus_devclass;
/*
* Device methods
*/
static int gbus_probe(device_t);
static int gbus_print_child(device_t, device_t);
static int gbus_read_ivar(device_t, device_t, int, u_long *);
static device_method_t gbus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, gbus_probe),
DEVMETHOD(device_attach, bus_generic_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
/* Bus interface */
DEVMETHOD(bus_print_child, gbus_print_child),
DEVMETHOD(bus_read_ivar, gbus_read_ivar),
DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
{ 0, 0 }
};
static driver_t gbus_driver = {
"gbus", gbus_methods, 1
};
/*
* At 'probe' time, we add all the devices which we know about to the
* bus. The generic attach routine will probe and attach them if they
* are alive.
*/
static int
gbus_probe(device_t dev)
{
device_t child;
struct gbus_device *gdev;
/*
* Make sure we're looking for a Gbus.
* A Gbus can only be a child of a TLSB CPU Node.
*/
if (!TLDEV_ISCPU(tlsb_get_dtype(device_get_parent(dev)))) {
return ENXIO;
}
for (gdev = gbus_children; gdev->gd_name; gdev++) {
child = device_add_child(dev, gdev->gd_name, -1);
device_set_ivars(child, gdev);
}
return (0);
}
static int
gbus_print_child(device_t bus, device_t dev)
{
struct gbus_device* gdev = DEVTOGBUS(dev);
int retval = 0;
retval += bus_print_child_header(bus, dev);
retval += printf(" on %s offset 0x%x\n", device_get_nameunit(bus),
gdev->gd_offset);
return (retval);
}
static int
gbus_read_ivar(device_t bus, device_t dev,
int index, u_long* result)
{
struct gbus_device* gdev = DEVTOGBUS(dev);
switch (index) {
case GBUS_IVAR_OFFSET:
*result = gdev->gd_offset;
break;
}
return ENOENT;
}
DRIVER_MODULE(gbus, tlsbcpu, gbus_driver, gbus_devclass, 0, 0);
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