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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  */
   25 
   26 #include "opt_uart.h"
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/bus.h>
   34 #include <sys/conf.h>
   35 #include <sys/kernel.h>
   36 #include <sys/module.h>
   37 #include <machine/bus.h>
   38 #include <sys/rman.h>
   39 #include <machine/resource.h>
   40 
   41 #include <dev/uart/uart.h>
   42 #include <dev/uart/uart_bus.h>
   43 #include <dev/uart/uart_cpu.h>
   44 
   45 #include <arm/at91/at91var.h>
   46 
   47 #include "uart_if.h"
   48 
   49 extern struct uart_class at91_usart_class;
   50 static int usart_at91_probe(device_t dev);
   51 
   52 static device_method_t usart_at91_methods[] = {
   53         /* Device interface */
   54         DEVMETHOD(device_probe,         usart_at91_probe),
   55         DEVMETHOD(device_attach,        uart_bus_attach),
   56         DEVMETHOD(device_detach,        uart_bus_detach),
   57         { 0, 0 }
   58 };
   59 
   60 static driver_t usart_at91_driver = {
   61         uart_driver_name,
   62         usart_at91_methods,
   63         sizeof(struct uart_softc),
   64 };
   65 
   66 extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
   67 
   68 static int
   69 usart_at91_probe(device_t dev)
   70 {
   71         struct uart_softc *sc;
   72 
   73         sc = device_get_softc(dev);
   74         switch (device_get_unit(dev))
   75         {
   76         case 0:
   77                 device_set_desc(dev, "DBGU");
   78                 /*
   79                  * Setting sc_sysdev makes this device a 'system device' and
   80                  * indirectly makes it the system console.
   81                  */
   82                 sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
   83                 bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
   84                 break;
   85         case 1:
   86                 device_set_desc(dev, "USART0");
   87                 break;
   88         case 2:
   89                 device_set_desc(dev, "USART1");
   90                 break;
   91         case 3:
   92                 device_set_desc(dev, "USART2");
   93                 break;
   94         case 4:
   95                 device_set_desc(dev, "USART3");
   96                 break;
   97         case 5:
   98                 device_set_desc(dev, "USART4");
   99                 break;
  100         case 6:
  101                 device_set_desc(dev, "USART5");
  102                 break;
  103         }
  104         sc->sc_class = &at91_usart_class;
  105         if (sc->sc_class->uc_rclk == 0)
  106                 sc->sc_class->uc_rclk = at91_master_clock;
  107         return (uart_bus_probe(dev, 0, 0, 0, device_get_unit(dev)));
  108 }
  109 
  110 
  111 DRIVER_MODULE(uart, atmelarm, usart_at91_driver, uart_devclass, 0, 0);

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FreeBSD/Linux Kernel Cross Reference sys/arm/at91/uart_bus_at91usart.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/at91/uart_bus_at91usart.c