410f244e4f
uart_ixp425_probe() and uart_cpu_getdev(). Change uart_cpu_getdev() to use hints to find the console. Reviewed by: marcel
97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/*-
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* Copyright (c) 2006 Kevin Lo. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <dev/pci/pcivar.h>
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#include <dev/ic/ns16550.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_bus.h>
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#include <dev/uart/uart_cpu.h>
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#include <arm/xscale/ixp425/ixp425reg.h>
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#include <arm/xscale/ixp425/ixp425var.h>
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#include "uart_if.h"
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static int uart_ixp425_probe(device_t dev);
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static device_method_t uart_ixp425_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, uart_ixp425_probe),
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DEVMETHOD(device_attach, uart_bus_attach),
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DEVMETHOD(device_detach, uart_bus_detach),
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{ 0, 0 }
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};
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static driver_t uart_ixp425_driver = {
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uart_driver_name,
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uart_ixp425_methods,
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sizeof(struct uart_softc),
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};
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DRIVER_MODULE(uart, ixp, uart_ixp425_driver, uart_devclass, 0, 0);
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static int
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uart_ixp425_probe(device_t dev)
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{
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struct uart_softc *sc;
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sc = device_get_softc(dev);
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sc->sc_class = &uart_ns8250_class;
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sc->sc_rrid = 0;
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sc->sc_rtype = SYS_RES_MEMORY;
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sc->sc_rres = bus_alloc_resource(dev, sc->sc_rtype, &sc->sc_rrid,
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0, ~0, uart_getrange(sc->sc_class), RF_ACTIVE);
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if (sc->sc_rres == NULL) {
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return (ENXIO);
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}
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sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
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sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
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/*
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* XXX set UART Unit Enable (0x40) AND
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* receiver timeout int enable (0x10).
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* The first turns on the UART. The second is necessary to get
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* interrupts when the FIFO has data but is not full. Note that
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* uart_ns8250 carefully avoids touching these bits so we can
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* just set them here and proceed. But this is fragile...
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*/
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bus_space_write_4(sc->sc_bas.bst, sc->sc_bas.bsh, IXP425_UART_IER,
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IXP425_UART_IER_UUE | IXP425_UART_IER_RTOIE);
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bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
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return uart_bus_probe(dev, 0, IXP425_UART_FREQ, 0, 0);
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}
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