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/mips/atheros/uart_bus_ar71xx.c

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    1 /*-
    2  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  */
   25 #include "opt_uart.h"
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   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 
   37 #include <machine/bus.h>
   38 
   39 #include <dev/uart/uart.h>
   40 #include <dev/uart/uart_cpu.h>
   41 #include <dev/uart/uart_bus.h>
   42 
   43 #include <mips/atheros/ar71xxreg.h>
   44 #include <mips/atheros/ar71xx_cpudef.h>
   45 
   46 #include "uart_if.h"
   47 
   48 static int uart_ar71xx_probe(device_t dev);
   49 extern struct uart_class uart_ar71xx_uart_class;
   50 
   51 static device_method_t uart_ar71xx_methods[] = {
   52         /* Device interface */
   53         DEVMETHOD(device_probe,         uart_ar71xx_probe),
   54         DEVMETHOD(device_attach,        uart_bus_attach),
   55         DEVMETHOD(device_detach,        uart_bus_detach),
   56         { 0, 0 }
   57 };
   58 
   59 static driver_t uart_ar71xx_driver = {
   60         uart_driver_name,
   61         uart_ar71xx_methods,
   62         sizeof(struct uart_softc),
   63 };
   64 
   65 extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
   66 
   67 static int
   68 uart_ar71xx_probe(device_t dev)
   69 {
   70         struct uart_softc *sc;
   71         uint64_t freq;
   72 
   73         freq = ar71xx_ahb_freq();
   74 
   75         sc = device_get_softc(dev);
   76         sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
   77         sc->sc_class = &uart_ns8250_class;
   78         bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
   79         sc->sc_sysdev->bas.regshft = 2;
   80         sc->sc_sysdev->bas.bst = mips_bus_space_generic;
   81         sc->sc_sysdev->bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR) + 3;
   82         sc->sc_bas.regshft = 2;
   83         sc->sc_bas.bst = mips_bus_space_generic;
   84         sc->sc_bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR) + 3;
   85 
   86         return (uart_bus_probe(dev, 2, freq, 0, 0));
   87 }
   88 
   89 DRIVER_MODULE(uart, apb, uart_ar71xx_driver, uart_devclass, 0, 0);

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