FreeBSD/Linux Kernel Cross Reference
sys/isa/atkbd_isa.c

     /*-
      * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer as
     *    the first lines of this file unmodified.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/5.2/sys/isa/atkbd_isa.c 116181 2003-06-11 00:34:37Z obrien $");
    
    #include "opt_kbd.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    #include <sys/rman.h>
    
    #include <sys/kbio.h>
    #include <dev/kbd/kbdreg.h>
    #include <dev/kbd/atkbdreg.h>
    #include <dev/kbd/atkbdcreg.h>
    
    #include <isa/isareg.h>
    #include <isa/isavar.h>
    
    typedef struct {
            struct resource *intr;
            void            *ih;
    } atkbd_softc_t;
    
    static devclass_t       atkbd_devclass;
    
    static void     atkbdidentify(driver_t *driver, device_t dev);
    static int      atkbdprobe(device_t dev);
    static int      atkbdattach(device_t dev);
    static int      atkbdresume(device_t dev);
    static void     atkbd_isa_intr(void *arg);
    
    static device_method_t atkbd_methods[] = {
            DEVMETHOD(device_identify,      atkbdidentify),
            DEVMETHOD(device_probe,         atkbdprobe),
            DEVMETHOD(device_attach,        atkbdattach),
            DEVMETHOD(device_resume,        atkbdresume),
            { 0, 0 }
    };
    
    static driver_t atkbd_driver = {
            ATKBD_DRIVER_NAME,
            atkbd_methods,
            sizeof(atkbd_softc_t),
    };
    
    static void
    atkbdidentify(driver_t *driver, device_t parent)
    {
    
            /* always add at least one child */
            BUS_ADD_CHILD(parent, KBDC_RID_KBD, driver->name, device_get_unit(parent));
    }
    
    static int
    atkbdprobe(device_t dev)
    {
            struct resource *res;
            u_long irq;
            int flags;
            int rid;
    
            device_set_desc(dev, "AT Keyboard");
    
            /* obtain parameters */
            flags = device_get_flags(dev);
    
            /* see if IRQ is available */
            rid = KBDC_RID_KBD;
            res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
                                    RF_SHAREABLE | RF_ACTIVE);
           if (res == NULL) {
                   if (bootverbose)
                           device_printf(dev, "unable to allocate IRQ\n");
                   return ENXIO;
           }
           irq = rman_get_start(res);
           bus_release_resource(dev, SYS_RES_IRQ, rid, res);
   
           /* probe the device */
           return atkbd_probe_unit(device_get_unit(dev),
                                   device_get_unit(device_get_parent(dev)),
                                   irq, flags);
   }
   
   static int
   atkbdattach(device_t dev)
   {
           atkbd_softc_t *sc;
           keyboard_t *kbd;
           u_long irq;
           int flags;
           int rid;
           int error;
   
           sc = device_get_softc(dev);
   
           rid = KBDC_RID_KBD;
           irq = bus_get_resource_start(dev, SYS_RES_IRQ, rid);
           flags = device_get_flags(dev);
           error = atkbd_attach_unit(device_get_unit(dev), &kbd,
                                     device_get_unit(device_get_parent(dev)),
                                     irq, flags);
           if (error)
                   return error;
   
           /* declare our interrupt handler */
           sc->intr = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
                                         RF_SHAREABLE | RF_ACTIVE);
           if (sc->intr == NULL)
                   return ENXIO;
           error = bus_setup_intr(dev, sc->intr, INTR_TYPE_TTY, atkbd_isa_intr,
                                  kbd, &sc->ih);
           if (error)
                   bus_release_resource(dev, SYS_RES_IRQ, rid, sc->intr);
   
           return error;
   }
   
   static int
   atkbdresume(device_t dev)
   {
           atkbd_softc_t *sc;
           keyboard_t *kbd;
           int args[2];
   
           sc = device_get_softc(dev);
           kbd = kbd_get_keyboard(kbd_find_keyboard(ATKBD_DRIVER_NAME,
                                                    device_get_unit(dev)));
           if (kbd) {
                   kbd->kb_flags &= ~KB_INITIALIZED;
                   args[0] = device_get_unit(device_get_parent(dev));
                   args[1] = rman_get_start(sc->intr);
                   (*kbdsw[kbd->kb_index]->init)(device_get_unit(dev), &kbd,
                                                 args, device_get_flags(dev));
                   (*kbdsw[kbd->kb_index]->clear_state)(kbd);
           }
           return 0;
   }
   
   static void
   atkbd_isa_intr(void *arg)
   {
           keyboard_t *kbd;
   
           kbd = (keyboard_t *)arg;
           (*kbdsw[kbd->kb_index]->intr)(kbd, NULL);
   }
   
   DRIVER_MODULE(atkbd, atkbdc, atkbd_driver, atkbd_devclass, 0, 0);

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