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/*-
* Copyright (c) 2006 Kevin Lo. 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.
*
* 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <dev/pci/pcivar.h>
#include <dev/ic/ns16550.h>
#include <dev/uart/uart.h>
#include <dev/uart/uart_bus.h>
#include <dev/uart/uart_cpu.h>
#include <arm/xscale/ixp425/ixp425reg.h>
#include <arm/xscale/ixp425/ixp425var.h>
#include "uart_if.h"
static int uart_ixp425_probe(device_t dev);
static device_method_t uart_ixp425_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, uart_ixp425_probe),
DEVMETHOD(device_attach, uart_bus_attach),
DEVMETHOD(device_detach, uart_bus_detach),
{ 0, 0 }
};
static driver_t uart_ixp425_driver = {
uart_driver_name,
uart_ixp425_methods,
sizeof(struct uart_softc),
};
DRIVER_MODULE(uart, ixp, uart_ixp425_driver, uart_devclass, 0, 0);
static int
uart_ixp425_probe(device_t dev)
{
struct uart_softc *sc;
sc = device_get_softc(dev);
sc->sc_class = &uart_ns8250_class;
sc->sc_rrid = 0;
sc->sc_rtype = SYS_RES_MEMORY;
sc->sc_rres = bus_alloc_resource(dev, sc->sc_rtype, &sc->sc_rrid,
0, ~0, uart_getrange(sc->sc_class), RF_ACTIVE);
if (sc->sc_rres == NULL) {
return (ENXIO);
}
sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
/*
* XXX set UART Unit Enable (0x40) AND
* receiver timeout int enable (0x10).
* The first turns on the UART. The second is necessary to get
* interrupts when the FIFO has data but is not full. Note that
* uart_ns8250 carefully avoids touching these bits so we can
* just set them here and proceed. But this is fragile...
*/
bus_space_write_4(sc->sc_bas.bst, sc->sc_bas.bsh, IXP425_UART_IER,
IXP425_UART_IER_UUE | IXP425_UART_IER_RTOIE);
bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
return uart_bus_probe(dev, 0, IXP425_UART_FREQ, 0, 0);
}
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