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/dev/uart/uart_bus_puc.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2006 Marcel Moolenaar.  All rights reserved.
    5  * Copyright (c) 2002 JF Hay.  All rights reserved.
    6  * Copyright (c) 2001 M. Warner Losh <imp@FreeBSD.org>
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/bus.h>
   35 #include <sys/conf.h>
   36 #include <sys/kernel.h>
   37 #include <sys/module.h>
   38 
   39 #include <machine/bus.h>
   40 #include <sys/rman.h>
   41 #include <machine/resource.h>
   42 
   43 #include <dev/puc/puc_bus.h>
   44 
   45 #include <dev/uart/uart.h>
   46 #include <dev/uart/uart_bus.h>
   47 
   48 static int uart_puc_probe(device_t dev);
   49 
   50 static device_method_t uart_puc_methods[] = {
   51         /* Device interface */
   52         DEVMETHOD(device_probe,         uart_puc_probe),
   53         DEVMETHOD(device_attach,        uart_bus_attach),
   54         DEVMETHOD(device_detach,        uart_bus_detach),
   55         /* Serdev interface */
   56         DEVMETHOD(serdev_ihand,         uart_bus_ihand),
   57         DEVMETHOD(serdev_ipend,         uart_bus_ipend),
   58         { 0, 0 }
   59 };
   60 
   61 static driver_t uart_puc_driver = {
   62         uart_driver_name,
   63         uart_puc_methods,
   64         sizeof(struct uart_softc),
   65 };
   66 
   67 static int
   68 uart_puc_probe(device_t dev)
   69 {
   70         device_t parent;
   71         struct uart_softc *sc;
   72         uintptr_t rclk, type;
   73 
   74         parent = device_get_parent(dev);
   75         sc = device_get_softc(dev);
   76 
   77         if (BUS_READ_IVAR(parent, dev, PUC_IVAR_TYPE, &type))
   78                 return (ENXIO);
   79         if (type != PUC_TYPE_SERIAL)
   80                 return (ENXIO);
   81 
   82         sc->sc_class = &uart_ns8250_class;
   83 
   84         if (BUS_READ_IVAR(parent, dev, PUC_IVAR_CLOCK, &rclk))
   85                 rclk = 0;
   86         return (uart_bus_probe(dev, 0, 0, rclk, 0, 0, 0));
   87 }
   88 
   89 DRIVER_MODULE(uart, puc, uart_puc_driver, uart_devclass, 0, 0);

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