source: mainline/kernel/arch/sparc64/src/drivers/kbd.c@ a31aad1

/*
 * 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>
#include <genarch/ofw/ebus.h>
#include <console/console.h>
#include <ddi/irq.h>
#include <mm/page.h>
#include <arch/mm/page.h>
#include <mm/km.h>
#include <typedefs.h>
#include <align.h>
#include <str.h>
#include <print.h>
#include <sysinfo/sysinfo.h>

#ifdef CONFIG_SUN_KBD
#include <genarch/kbrd/kbrd.h>
#endif

#ifdef CONFIG_NS16550
#include <genarch/drivers/ns16550/ns16550.h>
#endif

#ifdef CONFIG_SUN_KBD

#ifdef CONFIG_NS16550

static bool kbd_ns16550_init(ofw_tree_node_t *node)
{
        const char *name = ofw_tree_node_name(node);
        
        if (str_cmp(name, "su") != 0)
                return false;
        
        /*
         * Read 'interrupts' property.
         */
        ofw_tree_property_t *prop = ofw_tree_getprop(node, "interrupts");
        if ((!prop) || (!prop->value)) {
                printf("ns16550: Unable to find interrupts property\n");
                return false;
        }
        
        uint32_t interrupts = *((uint32_t *) prop->value);
        
        /*
         * Read 'reg' property.
         */
        prop = ofw_tree_getprop(node, "reg");
        if ((!prop) || (!prop->value)) {
                printf("ns16550: Unable to find reg property\n");
                return false;
        }
        
        size_t size = ((ofw_ebus_reg_t *) prop->value)->size;
        
        uintptr_t pa;
        if (!ofw_ebus_apply_ranges(node->parent,
            ((ofw_ebus_reg_t *) prop->value), &pa)) {
                printf("ns16550: Failed to determine address\n");
                return false;
        }
        
        inr_t inr;
        cir_t cir;
        void *cir_arg;
        if (!ofw_ebus_map_interrupt(node->parent,
            ((ofw_ebus_reg_t *) prop->value), interrupts, &inr, &cir,
            &cir_arg)) {
                printf("ns16550: Failed to determine interrupt\n");
                return false;
        }
        
        /*
         * We need to pass aligned address to hw_map().
         * However, the physical keyboard address can
         * be pretty much unaligned, depending on the
         * underlying controller.
         */
        uintptr_t aligned_addr = ALIGN_DOWN(pa, PAGE_SIZE);
        size_t offset = pa - aligned_addr;
        
        ns16550_t *ns16550 = (ns16550_t *) (km_map(aligned_addr, offset + size,
            PAGE_WRITE | PAGE_NOT_CACHEABLE) + offset);
        
        ns16550_instance_t *ns16550_instance = ns16550_init(ns16550, inr, cir, cir_arg);
        if (ns16550_instance) {
                kbrd_instance_t *kbrd_instance = kbrd_init();
                if (kbrd_instance) {
                        indev_t *sink = stdin_wire();
                        indev_t *kbrd = kbrd_wire(kbrd_instance, sink);
                        ns16550_wire(ns16550_instance, kbrd);
                }
        }
        
        /*
         * This is the necessary evil until the userspace drivers are
         * entirely self-sufficient.
         */
        sysinfo_set_item_val("kbd", NULL, true);
        sysinfo_set_item_val("kbd.inr", NULL, inr);
        sysinfo_set_item_val("kbd.address.physical", NULL, pa);
        sysinfo_set_item_val("kbd.type.ns16550", NULL, true);
        
        return true;
}

#endif /* CONFIG_NS16550 */

/** 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)
{
#ifdef CONFIG_NS16550
        kbd_ns16550_init(node);
#endif
}

#endif /* CONFIG_SUN_KBD */

/** @}
 */