The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/i8134x/uart_bus_i81342.c

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    1 /*-
    2  * Copyright (c) 2004 Olivier Houchard.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   23  */
   24 
   25 #include <sys/cdefs.h>
   26 __FBSDID("$FreeBSD: releng/10.0/sys/arm/xscale/i8134x/uart_bus_i81342.c 171626 2007-07-27 14:50:57Z cognet $");
   27 
   28 #include <sys/param.h>
   29 #include <sys/systm.h>
   30 #include <sys/bus.h>
   31 #include <sys/conf.h>
   32 #include <sys/kernel.h>
   33 #include <sys/module.h>
   34 #include <machine/bus.h>
   35 #include <sys/rman.h>
   36 #include <machine/resource.h>
   37 
   38 #include <dev/pci/pcivar.h>
   39 
   40 #include <dev/uart/uart.h>
   41 #include <dev/uart/uart_bus.h>
   42 #include <dev/uart/uart_cpu.h>
   43 
   44 #include <dev/ic/ns16550.h>
   45 
   46 #include "uart_if.h"
   47 
   48 static int uart_i81342_probe(device_t dev);
   49 
   50 static device_method_t uart_i81342_methods[] = {
   51         /* Device interface */
   52         DEVMETHOD(device_probe,         uart_i81342_probe),
   53         DEVMETHOD(device_attach,        uart_bus_attach),
   54         DEVMETHOD(device_detach,        uart_bus_detach),
   55         { 0, 0 }
   56 };
   57 
   58 static driver_t uart_i81342_driver = {
   59         uart_driver_name,
   60         uart_i81342_methods,
   61         sizeof(struct uart_softc),
   62 };
   63 
   64 extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
   65 static int
   66 uart_i81342_probe(device_t dev)
   67 {
   68         struct uart_softc *sc;
   69         int err;
   70 
   71         sc = device_get_softc(dev);
   72         sc->sc_class = &uart_ns8250_class;
   73         if (device_get_unit(dev) == 0) {
   74                 sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
   75                 bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
   76         }
   77         sc->sc_rres = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->sc_rrid,
   78             0, ~0, uart_getrange(sc->sc_class), RF_ACTIVE);
   79         
   80         sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
   81         sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
   82         bus_space_write_4(sc->sc_bas.bst, sc->sc_bas.bsh, REG_IER << 2,
   83             0x40 | 0x10);
   84         bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
   85 
   86         err = uart_bus_probe(dev, 2, 33334000, 0, device_get_unit(dev));
   87         sc->sc_rxfifosz = sc->sc_txfifosz = 1;
   88         return (err);
   89 }
   90 
   91 
   92 DRIVER_MODULE(uart, obio, uart_i81342_driver, uart_devclass, 0, 0);

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