FreeBSD/Linux Kernel Cross Reference
sys/powerpc/amigaone/platform_amigaone.c

     /*-
      * Copyright (c) 2019 Justin Hibbits
      *
      * 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.
     * 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 AUTHOR ``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 AUTHOR 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("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/malloc.h>
    #include <sys/smp.h>
    
    #include <machine/intr_machdep.h>
    #include <machine/platform.h>
    #include <machine/platformvar.h>
    
    #include <dev/ofw/openfirm.h>
    #include <dev/ofw/ofw_bus.h>
    
    #include <powerpc/mpc85xx/mpc85xx.h>
    
    #include "platform_if.h"
    
    static void aeon_pbutton_intr(void *_unused);
    static void aeon_setup_intr(void *unused);
    
    static int aeon_probe(platform_t);
    static int aeon_attach(platform_t);
    
    static platform_method_t aeon_methods[] = {
            PLATFORMMETHOD(platform_probe,          aeon_probe),
            PLATFORMMETHOD(platform_attach,         aeon_attach),
            PLATFORMMETHOD_END
    };
    
    DEFINE_CLASS_1(aeon, aeon_platform, aeon_methods, 0, mpc85xx_platform);
    
    PLATFORM_DEF(aeon_platform);
    
    static bool is_aeon;
    
    static int
    aeon_probe(platform_t plat)
    {
            phandle_t rootnode;
            char model[32];
    
            rootnode = OF_finddevice("/");
    
            if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) {
                    if (strncmp(model, "varisys,", strlen("varisys,")) == 0)
                            return (BUS_PROBE_SPECIFIC);
            }
    
            return (ENXIO);
    }
    
    static int
    aeon_attach(platform_t plat)
    {
            int error;
    
            error = mpc85xx_attach(plat);
            if (error)
                    return (error);
    
            is_aeon = true;
    
            return (0);
    }
    
    /* Notify devd(8) that the power button was pressed (IRQ#4 on A-Eon machines). */
    static void
    aeon_pbutton_intr(void *_unused)
    {
            devctl_notify("AEON", "power", "press", NULL);
   }
   
   /* Manually configure the power button IRQ handler. */
   static void
   aeon_setup_intr(void *unused)
   {
           int irq;
   
           if (!is_aeon)
                   return;
   
           if (bootverbose)
                   printf("Configuring AmigaOne power button.\n");
   
           irq = 4; /* From TRM, IRQ4 is raised when power button is pressed. */
   
           /* Get us the root PIC. */
           irq = MAP_IRQ(0, irq);
           powerpc_config_intr(irq, INTR_TRIGGER_EDGE, INTR_POLARITY_LOW);
           powerpc_setup_intr("power_button", irq, NULL, aeon_pbutton_intr, NULL,
               INTR_TYPE_MISC, NULL, 0);
   }
   
   SYSINIT(aeon_setup_intr, SI_SUB_CONFIGURE, SI_ORDER_ANY, aeon_setup_intr, NULL);

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