FreeBSD/Linux Kernel Cross Reference
sys/dev/uart/uart_bus_puc.c

     /*-
      * Copyright (c) 2006 Marcel Moolenaar.  All rights reserved.
      * Copyright (c) 2002 JF Hay.  All rights reserved.
      * Copyright (c) 2001 M. Warner Losh.  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: releng/8.4/sys/dev/uart/uart_bus_puc.c 158124 2006-04-28 21:21:53Z marcel $");
    
    #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/puc/puc_bus.h>
    
    #include <dev/uart/uart.h>
    #include <dev/uart/uart_bus.h>
    
    static int uart_puc_probe(device_t dev);
    
    static device_method_t uart_puc_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         uart_puc_probe),
            DEVMETHOD(device_attach,        uart_bus_attach),
            DEVMETHOD(device_detach,        uart_bus_detach),
            /* Serdev interface */
            DEVMETHOD(serdev_ihand,         uart_bus_ihand),
            DEVMETHOD(serdev_ipend,         uart_bus_ipend),
            { 0, 0 }
    };
    
    static driver_t uart_puc_driver = {
            uart_driver_name,
            uart_puc_methods,
            sizeof(struct uart_softc),
    };
    
    static int
    uart_puc_probe(device_t dev)
    {
            device_t parent;
            struct uart_softc *sc;
            uintptr_t rclk, type;
    
            parent = device_get_parent(dev);
            sc = device_get_softc(dev);
    
            if (BUS_READ_IVAR(parent, dev, PUC_IVAR_TYPE, &type))
                    return (ENXIO);
            if (type != PUC_TYPE_SERIAL)
                    return (ENXIO);
    
            sc->sc_class = &uart_ns8250_class;
    
            if (BUS_READ_IVAR(parent, dev, PUC_IVAR_CLOCK, &rclk))
                    rclk = 0;
            return (uart_bus_probe(dev, 0, rclk, 0, 0));
    }
    
    DRIVER_MODULE(uart, puc, uart_puc_driver, uart_devclass, 0, 0);

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