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

     /*-
      * 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("$FreeBSD$");
    
    #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 <isa/isavar.h>
    
    #include <dev/uart/uart.h>
    #include <dev/uart/uart_bus.h>
    
    static int uart_acpi_probe(device_t dev);
    
    static device_method_t uart_acpi_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         uart_acpi_probe),
            DEVMETHOD(device_attach,        uart_bus_attach),
            DEVMETHOD(device_detach,        uart_bus_detach),
            { 0, 0 }
    };
    
    static driver_t uart_acpi_driver = {
            uart_driver_name,
            uart_acpi_methods,
            sizeof(struct uart_softc),
    };
    
    static struct isa_pnp_id acpi_ns8250_ids[] = {
            {0x0005d041, "Standard PC COM port"},           /* PNP0500 */
            {0x0105d041, "16550A-compatible COM port"},     /* PNP0501 */
            {0}
    };
    
    static int
    uart_acpi_probe(device_t dev)
    {
            struct uart_softc *sc;
            device_t parent;
    
            parent = device_get_parent(dev);
            sc = device_get_softc(dev);
    
            if (!ISA_PNP_PROBE(parent, dev, acpi_ns8250_ids)) {
                    sc->sc_class = &uart_ns8250_class;
                    return (uart_bus_probe(dev, 0, 0, 0, 0));
            }
    
            /* Add checks for non-ns8250 IDs here. */
            return (ENXIO);
    }
    
    DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0);

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