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/isa/atkbd_isa.c

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    1 /*-
    2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    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 as
   10  *    the first lines of this file unmodified.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD: src/sys/isa/atkbd_isa.c,v 1.13 2001/09/23 08:42:06 yokota Exp $
   27  */
   28 
   29 #include "opt_kbd.h"
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/kernel.h>
   34 #include <sys/bus.h>
   35 
   36 #include <machine/bus.h>
   37 #include <machine/resource.h>
   38 #include <sys/rman.h>
   39 
   40 #include <sys/kbio.h>
   41 #include <dev/kbd/kbdreg.h>
   42 #include <dev/kbd/atkbdreg.h>
   43 #include <dev/kbd/atkbdcreg.h>
   44 
   45 #include <isa/isareg.h>
   46 #include <isa/isavar.h>
   47 
   48 typedef struct {
   49         struct resource *intr;
   50         void            *ih;
   51 } atkbd_softc_t;
   52 
   53 devclass_t      atkbd_devclass;
   54 
   55 static void     atkbdidentify(driver_t *driver, device_t dev);
   56 static int      atkbdprobe(device_t dev);
   57 static int      atkbdattach(device_t dev);
   58 static int      atkbdresume(device_t dev);
   59 static void     atkbd_isa_intr(void *arg);
   60 
   61 static device_method_t atkbd_methods[] = {
   62         DEVMETHOD(device_identify,      atkbdidentify),
   63         DEVMETHOD(device_probe,         atkbdprobe),
   64         DEVMETHOD(device_attach,        atkbdattach),
   65         DEVMETHOD(device_resume,        atkbdresume),
   66         { 0, 0 }
   67 };
   68 
   69 static driver_t atkbd_driver = {
   70         ATKBD_DRIVER_NAME,
   71         atkbd_methods,
   72         sizeof(atkbd_softc_t),
   73 };
   74 
   75 static void
   76 atkbdidentify(driver_t *driver, device_t parent)
   77 {
   78 
   79         /* always add at least one child */
   80         BUS_ADD_CHILD(parent, KBDC_RID_KBD, driver->name, device_get_unit(parent));
   81 }
   82 
   83 static int
   84 atkbdprobe(device_t dev)
   85 {
   86         struct resource *res;
   87         u_long irq;
   88         int flags;
   89         int rid;
   90 
   91         device_set_desc(dev, "AT Keyboard");
   92 
   93         /* obtain parameters */
   94         flags = device_get_flags(dev);
   95 
   96         /* see if IRQ is available */
   97         rid = KBDC_RID_KBD;
   98         res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
   99                                  RF_SHAREABLE | RF_ACTIVE);
  100         if (res == NULL) {
  101                 if (bootverbose)
  102                         device_printf(dev, "unable to allocate IRQ\n");
  103                 return ENXIO;
  104         }
  105         irq = rman_get_start(res);
  106         bus_release_resource(dev, SYS_RES_IRQ, rid, res);
  107 
  108         /* probe the device */
  109         return atkbd_probe_unit(device_get_unit(dev),
  110                                 device_get_unit(device_get_parent(dev)),
  111                                 irq, flags);
  112 }
  113 
  114 static int
  115 atkbdattach(device_t dev)
  116 {
  117         atkbd_softc_t *sc;
  118         keyboard_t *kbd;
  119         u_long irq;
  120         int flags;
  121         int rid;
  122         int error;
  123 
  124         sc = device_get_softc(dev);
  125 
  126         rid = KBDC_RID_KBD;
  127         irq = bus_get_resource_start(dev, SYS_RES_IRQ, rid);
  128         flags = device_get_flags(dev);
  129         error = atkbd_attach_unit(device_get_unit(dev), &kbd,
  130                                   device_get_unit(device_get_parent(dev)),
  131                                   irq, flags);
  132         if (error)
  133                 return error;
  134 
  135         /* declare our interrupt handler */
  136         sc->intr = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
  137                                       RF_SHAREABLE | RF_ACTIVE);
  138         if (sc->intr == NULL)
  139                 return ENXIO;
  140         error = bus_setup_intr(dev, sc->intr, INTR_TYPE_TTY, atkbd_isa_intr,
  141                                kbd, &sc->ih);
  142         if (error)
  143                 bus_release_resource(dev, SYS_RES_IRQ, rid, sc->intr);
  144 
  145         return error;
  146 }
  147 
  148 static int
  149 atkbdresume(device_t dev)
  150 {
  151         atkbd_softc_t *sc;
  152         keyboard_t *kbd;
  153         int args[2];
  154 
  155         sc = device_get_softc(dev);
  156         kbd = kbd_get_keyboard(kbd_find_keyboard(ATKBD_DRIVER_NAME,
  157                                                  device_get_unit(dev)));
  158         if (kbd) {
  159                 kbd->kb_flags &= ~KB_INITIALIZED;
  160                 args[0] = device_get_unit(device_get_parent(dev));
  161                 args[1] = rman_get_start(sc->intr);
  162                 (*kbdsw[kbd->kb_index]->init)(device_get_unit(dev), &kbd,
  163                                               args, device_get_flags(dev));
  164                 (*kbdsw[kbd->kb_index]->clear_state)(kbd);
  165         }
  166         return 0;
  167 }
  168 
  169 static void
  170 atkbd_isa_intr(void *arg)
  171 {
  172         keyboard_t *kbd;
  173 
  174         kbd = (keyboard_t *)arg;
  175         (*kbdsw[kbd->kb_index]->intr)(kbd, NULL);
  176 }
  177 
  178 DRIVER_MODULE(atkbd, atkbdc, atkbd_driver, atkbd_devclass, 0, 0);

Cache object: b7f634bce4d1640a7e77bf31743f8a32


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