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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include "opt_kbd.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/bus.h>
   37 
   38 #include <machine/bus.h>
   39 #include <machine/resource.h>
   40 #include <sys/rman.h>
   41 
   42 #include <sys/kbio.h>
   43 #include <dev/kbd/kbdreg.h>
   44 #include <dev/kbd/atkbdreg.h>
   45 #include <dev/kbd/atkbdcreg.h>
   46 
   47 #include <isa/isareg.h>
   48 #include <isa/isavar.h>
   49 
   50 typedef struct {
   51         struct resource *intr;
   52         void            *ih;
   53 } atkbd_softc_t;
   54 
   55 static devclass_t       atkbd_devclass;
   56 
   57 static void     atkbdidentify(driver_t *driver, device_t dev);
   58 static int      atkbdprobe(device_t dev);
   59 static int      atkbdattach(device_t dev);
   60 static int      atkbdresume(device_t dev);
   61 static void     atkbd_isa_intr(void *arg);
   62 
   63 static device_method_t atkbd_methods[] = {
   64         DEVMETHOD(device_identify,      atkbdidentify),
   65         DEVMETHOD(device_probe,         atkbdprobe),
   66         DEVMETHOD(device_attach,        atkbdattach),
   67         DEVMETHOD(device_resume,        atkbdresume),
   68         { 0, 0 }
   69 };
   70 
   71 static driver_t atkbd_driver = {
   72         ATKBD_DRIVER_NAME,
   73         atkbd_methods,
   74         sizeof(atkbd_softc_t),
   75 };
   76 
   77 static void
   78 atkbdidentify(driver_t *driver, device_t parent)
   79 {
   80 
   81         /* always add at least one child */
   82         BUS_ADD_CHILD(parent, KBDC_RID_KBD, driver->name, device_get_unit(parent));
   83 }
   84 
   85 static int
   86 atkbdprobe(device_t dev)
   87 {
   88         struct resource *res;
   89         u_long irq;
   90         int flags;
   91         int rid;
   92 
   93         device_set_desc(dev, "AT Keyboard");
   94 
   95         /* obtain parameters */
   96         flags = device_get_flags(dev);
   97 
   98         /* see if IRQ is available */
   99         rid = KBDC_RID_KBD;
  100         res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
  101                                      RF_SHAREABLE | RF_ACTIVE);
  102         if (res == NULL) {
  103                 if (bootverbose)
  104                         device_printf(dev, "unable to allocate IRQ\n");
  105                 return ENXIO;
  106         }
  107         irq = rman_get_start(res);
  108         bus_release_resource(dev, SYS_RES_IRQ, rid, res);
  109 
  110         /* probe the device */
  111         return atkbd_probe_unit(device_get_unit(dev),
  112                                 device_get_unit(device_get_parent(dev)),
  113                                 irq, flags);
  114 }
  115 
  116 static int
  117 atkbdattach(device_t dev)
  118 {
  119         atkbd_softc_t *sc;
  120         keyboard_t *kbd;
  121         u_long irq;
  122         int flags;
  123         int rid;
  124         int error;
  125 
  126         sc = device_get_softc(dev);
  127 
  128         rid = KBDC_RID_KBD;
  129         irq = bus_get_resource_start(dev, SYS_RES_IRQ, rid);
  130         flags = device_get_flags(dev);
  131         error = atkbd_attach_unit(device_get_unit(dev), &kbd,
  132                                   device_get_unit(device_get_parent(dev)),
  133                                   irq, flags);
  134         if (error)
  135                 return error;
  136 
  137         /* declare our interrupt handler */
  138         sc->intr = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
  139                                           RF_SHAREABLE | RF_ACTIVE);
  140         if (sc->intr == NULL)
  141                 return ENXIO;
  142         error = bus_setup_intr(dev, sc->intr, INTR_TYPE_TTY, atkbd_isa_intr,
  143                                kbd, &sc->ih);
  144         if (error)
  145                 bus_release_resource(dev, SYS_RES_IRQ, rid, sc->intr);
  146 
  147         return error;
  148 }
  149 
  150 static int
  151 atkbdresume(device_t dev)
  152 {
  153         atkbd_softc_t *sc;
  154         keyboard_t *kbd;
  155         int args[2];
  156 
  157         sc = device_get_softc(dev);
  158         kbd = kbd_get_keyboard(kbd_find_keyboard(ATKBD_DRIVER_NAME,
  159                                                  device_get_unit(dev)));
  160         if (kbd) {
  161                 kbd->kb_flags &= ~KB_INITIALIZED;
  162                 args[0] = device_get_unit(device_get_parent(dev));
  163                 args[1] = rman_get_start(sc->intr);
  164                 (*kbdsw[kbd->kb_index]->init)(device_get_unit(dev), &kbd,
  165                                               args, device_get_flags(dev));
  166                 (*kbdsw[kbd->kb_index]->clear_state)(kbd);
  167         }
  168         return 0;
  169 }
  170 
  171 static void
  172 atkbd_isa_intr(void *arg)
  173 {
  174         keyboard_t *kbd;
  175 
  176         kbd = (keyboard_t *)arg;
  177         (*kbdsw[kbd->kb_index]->intr)(kbd, NULL);
  178 }
  179 
  180 DRIVER_MODULE(atkbd, atkbdc, atkbd_driver, atkbd_devclass, 0, 0);

Cache object: 6331bbde8f8955b1fef6a5b9cffefa4d


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