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/at91/uart_bus_at91usart.c

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    1 /*-
    2  * Copyright (c) 2005 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 "opt_uart.h"
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/6.2/sys/arm/at91/uart_bus_at91usart.c 159907 2006-06-23 23:35:36Z cognet $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/bus.h>
   33 #include <sys/conf.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <machine/bus.h>
   37 #include <sys/rman.h>
   38 #include <machine/resource.h>
   39 
   40 #include <dev/pci/pcivar.h>
   41 
   42 #include <dev/uart/uart.h>
   43 #include <dev/uart/uart_bus.h>
   44 #include <dev/uart/uart_cpu.h>
   45 
   46 #include <arm/at91/at91rm92reg.h>
   47 
   48 #include "uart_if.h"
   49 
   50 static int usart_at91rm92_probe(device_t dev);
   51 
   52 extern struct uart_class at91_usart_class;
   53 
   54 static device_method_t usart_at91rm92_methods[] = {
   55         /* Device interface */
   56         DEVMETHOD(device_probe,         usart_at91rm92_probe),
   57         DEVMETHOD(device_attach,        uart_bus_attach),
   58         DEVMETHOD(device_detach,        uart_bus_detach),
   59         { 0, 0 }
   60 };
   61 
   62 static driver_t usart_at91rm92_driver = {
   63         uart_driver_name,
   64         usart_at91rm92_methods,
   65         sizeof(struct uart_softc),
   66 };
   67 
   68 extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
   69 
   70 static int
   71 usart_at91rm92_probe(device_t dev)
   72 {
   73         struct uart_softc *sc;
   74 
   75         sc = device_get_softc(dev);
   76         switch (device_get_unit(dev))
   77         {
   78         case 0:
   79 #ifdef SKYEYE_WORKAROUNDS
   80                 device_set_desc(dev, "USART0");
   81 #else
   82                 device_set_desc(dev, "DBGU");
   83 #endif
   84                 /*
   85                  * Setting sc_sysdev makes this device a 'system device' and
   86                  * indirectly makes it the system console.
   87                  */
   88                 sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
   89                 bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
   90                 break;
   91         case 1:
   92                 device_set_desc(dev, "USART0");
   93                 break;
   94         case 2:
   95                 device_set_desc(dev, "USART1");
   96                 break;
   97         case 3:
   98                 device_set_desc(dev, "USART2");
   99                 break;
  100         case 4:
  101                 device_set_desc(dev, "USART3");
  102                 break;
  103         }
  104         sc->sc_class = &at91_usart_class;
  105         return (uart_bus_probe(dev, 0, 0, 0, device_get_unit(dev)));
  106 }
  107 
  108 
  109 DRIVER_MODULE(uart, atmelarm, usart_at91rm92_driver, uart_devclass, 0, 0);

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