sio_puc.c

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    1 /*-
    2  * Copyright (c) 2002 JF Hay.  All rights reserved.
    3  * Copyright (c) 2001 M. Warner Losh.  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 ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  */
   25 
   26 #include <sys/cdefs.h>
   27 __FBSDID("$FreeBSD: releng/8.4/sys/dev/sio/sio_puc.c 185059 2008-11-18 21:01:54Z jhb $");
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/bus.h>
   32 #include <sys/conf.h>
   33 #include <sys/kernel.h>
   34 #include <sys/lock.h>
   35 #include <sys/malloc.h>
   36 #include <sys/mutex.h>
   37 #include <sys/module.h>
   38 #include <sys/tty.h>
   39 #include <machine/bus.h>
   40 #include <sys/timepps.h>
   41 
   42 #include <dev/puc/puc_bus.h>
   43 
   44 #include <dev/sio/siovar.h>
   45 #include <dev/sio/sioreg.h>
   46 
   47 static  int     sio_puc_attach(device_t dev);
   48 static  int     sio_puc_probe(device_t dev);
   49 
   50 static device_method_t sio_puc_methods[] = {
   51         /* Device interface */
   52         DEVMETHOD(device_probe,         sio_puc_probe),
   53         DEVMETHOD(device_attach,        sio_puc_attach),
   54         DEVMETHOD(device_detach,        siodetach),
   55 
   56         { 0, 0 }
   57 };
   58 
   59 static driver_t sio_puc_driver = {
   60         sio_driver_name,
   61         sio_puc_methods,
   62         0,
   63 };
   64 
   65 static int
   66 sio_puc_attach(device_t dev)
   67 {
   68         uintptr_t rclk;
   69 
   70         if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_CLOCK,
   71             &rclk) != 0)
   72                 rclk = DEFAULT_RCLK;
   73         return (sioattach(dev, 0, rclk));
   74 }
   75 
   76 static int
   77 sio_puc_probe(device_t dev)
   78 {
   79         device_t parent;
   80         uintptr_t rclk, type;
   81         int error;
   82 
   83         parent = device_get_parent(dev);
   84 
   85         if (BUS_READ_IVAR(parent, dev, PUC_IVAR_TYPE, &type))
   86                 return (ENXIO);
   87         if (type != PUC_TYPE_SERIAL)
   88                 return (ENXIO);
   89 
   90         if (BUS_READ_IVAR(parent, dev, PUC_IVAR_CLOCK, &rclk))
   91                 rclk = DEFAULT_RCLK;
   92 #ifdef PC98
   93         SET_FLAG(dev, SET_IFTYPE(COM_IF_NS16550));
   94 #endif
   95         error = sioprobe(dev, 0, rclk, 1);
   96         return ((error > 0) ? error : BUS_PROBE_LOW_PRIORITY);
   97 }
   98 
   99 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, 0, 0);

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FreeBSD/Linux Kernel Cross Reference sys/dev/sio/sio_puc.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/sio/sio_puc.c