source: mainline/kernel/arch/sparc64/src/drivers/kbd.c@ 6ff1f1e

/*
 * Copyright (C) 2006 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * 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.
 */

/** @addtogroup sparc64 
 * @{
 */
/** @file
 */

#include <arch/drivers/kbd.h>
#include <genarch/ofw/ofw_tree.h>
#ifdef CONFIG_Z8530
#include <genarch/kbd/z8530.h>
#endif
#ifdef CONFIG_NS16550
#include <genarch/kbd/ns16550.h>
#endif

#include <arch/mm/page.h>
#include <arch/types.h>
#include <typedefs.h>
#include <align.h>
#include <func.h>
#include <print.h>

volatile uint8_t *kbd_virt_address = NULL;

kbd_type_t kbd_type = KBD_UNKNOWN;

/** Initialize keyboard.
 *
 * Traverse OpenFirmware device tree in order to find necessary
 * info about the keyboard device.
 *
 * @param node Keyboard device node.
 */
void kbd_init(ofw_tree_node_t *node)
{
        size_t offset;
        uintptr_t aligned_addr;
        ofw_tree_property_t *prop;
        const char *name;
        
        name = ofw_tree_node_name(node);
        
        if (strcmp(name, "zs") == 0)
                kbd_type = KBD_Z8530;
        else if (strcmp(name, "su") == 0)
                kbd_type = KBD_NS16550;
        
        if (kbd_type == KBD_UNKNOWN) {
                printf("Unknown keyboard device.\n");
                return;
        }
        
        prop = ofw_tree_getprop(node, "reg");
        if (!prop)
                panic("Can't find \"reg\" property.\n");
        
        uintptr_t pa;
        size_t size;
        
        switch (kbd_type) {
        case KBD_Z8530:
                size = ((ofw_fhc_reg_t *) prop->value)->size;
                if (!ofw_fhc_apply_ranges(node->parent, ((ofw_fhc_reg_t *) prop->value) , &pa)) {
                        printf("Failed to determine keyboard address.\n");
                        return;
                }
                break;
        case KBD_NS16550:
                size = ((ofw_ebus_reg_t *) prop->value)->size;
                if (!ofw_ebus_apply_ranges(node->parent, ((ofw_ebus_reg_t *) prop->value) , &pa)) {
                        printf("Failed to determine keyboard address.\n");
                        return;
                }
                break;
        default:
                panic("Unexpected type.\n");
        }
        
        /*
         * We need to pass aligned address to hw_map().
         * However, the physical keyboard address can
         * be pretty much unaligned, depending on the
         * underlying controller.
         */
        aligned_addr = ALIGN_DOWN(pa, PAGE_SIZE);
        offset = pa - aligned_addr;
        kbd_virt_address = (uint8_t *) hw_map(aligned_addr, offset + size) + offset;

        switch (kbd_type) {
#ifdef CONFIG_Z8530
        case KBD_Z8530:
                z8530_init();
                break;
#endif
#ifdef CONFIG_NS16550
        case KBD_NS16550:
                ns16550_init();
                break;
#endif
        default:
                printf("Kernel is not compiled with the necessary keyboard driver this machine requires.\n");
        }
}

/** @}
 */