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freebsd/sys/mips/cavium/obio.c
Warner Losh f17768d6df Export knowledge of the special bus space we use for the console to
obio.  Take advantage of the fact that obio only really supports uart
at the moment to use the uart bus tag always for IOPORT allocations.

# this needs to be redone to conform to FreeBSD standards and allow for
# additional drivers for SoC hardware to attach
2010-01-25 19:27:20 +00:00

186 lines
5.1 KiB
C

/* $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $ */
/*-
* Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* On-board device autoconfiguration support for Cavium OCTEON 1 family of
* SoC devices.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <mips/cavium/octeon_pcmap_regs.h>
#include <mips/cavium/obiovar.h>
extern struct bus_space octeon_uart_tag;
int obio_probe(device_t);
int obio_attach(device_t);
/*
* We need only one obio. Any other device hanging off of it,
* shouldn't cause multiple of these to be found.
*/
static int have_one = 0;
int
obio_probe(device_t dev)
{
if (!have_one) {
have_one = 1;
return 0;
}
return (ENXIO);
}
int
obio_attach(device_t dev)
{
struct obio_softc *sc = device_get_softc(dev);
sc->oba_st = mips_bus_space_generic;
sc->oba_addr = OCTEON_MIO_UART0;
sc->oba_size = 0x10000;
sc->oba_rman.rm_type = RMAN_ARRAY;
sc->oba_rman.rm_descr = "OBIO I/O";
if (rman_init(&sc->oba_rman) != 0 ||
rman_manage_region(&sc->oba_rman,
sc->oba_addr, sc->oba_addr + sc->oba_size) != 0)
panic("obio_attach: failed to set up I/O rman");
sc->oba_irq_rman.rm_type = RMAN_ARRAY;
sc->oba_irq_rman.rm_descr = "OBIO IRQ";
/*
* This module is intended for UART purposes only and
* it's IRQ is 0 corresponding to IP2.
*/
if (rman_init(&sc->oba_irq_rman) != 0 ||
rman_manage_region(&sc->oba_irq_rman, 0, 0) != 0)
panic("obio_attach: failed to set up IRQ rman");
device_add_child(dev, "uart", 1); /* Setup Uart-1 first. */
device_add_child(dev, "uart", 0); /* Uart-0 next. So it is first in console list */
bus_generic_probe(dev);
bus_generic_attach(dev);
return (0);
}
static struct resource *
obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct resource *rv;
struct rman *rm;
bus_space_tag_t bt = 0;
bus_space_handle_t bh = 0;
struct obio_softc *sc = device_get_softc(bus);
switch (type) {
case SYS_RES_IRQ:
rm = &sc->oba_irq_rman;
break;
case SYS_RES_MEMORY:
return (NULL);
case SYS_RES_IOPORT:
rm = &sc->oba_rman;
bt = &octeon_uart_tag;
bh = device_get_unit(child) ?
OCTEON_MIO_UART1 : OCTEON_MIO_UART0;
start = bh;
break;
default:
return (NULL);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == NULL) {
return (NULL);
}
if (type == SYS_RES_IRQ) {
return (rv);
}
rman_set_rid(rv, *rid);
rman_set_bustag(rv, bt);
rman_set_bushandle(rv, bh);
if (0) {
if (bus_activate_resource(child, type, *rid, rv)) {
rman_release_resource(rv);
return (NULL);
}
}
return (rv);
}
static int
obio_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
return (0);
}
static device_method_t obio_methods[] = {
DEVMETHOD(device_probe, obio_probe),
DEVMETHOD(device_attach, obio_attach),
DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
DEVMETHOD(bus_activate_resource, obio_activate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
{0, 0},
};
static driver_t obio_driver = {
"obio",
obio_methods,
sizeof(struct obio_softc),
};
static devclass_t obio_devclass;
DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0);