source: mainline/kernel/arch/sparc64/src/console.c@ 411b6a6

/*
 * Copyright (c) 2005 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/console.h>
#include <arch/types.h>

#include <arch/drivers/scr.h>
#include <arch/drivers/kbd.h>

#include <arch/drivers/sgcn.h>

#include <console/chardev.h>
#include <console/console.h>
#include <arch/asm.h>
#include <arch/register.h>
#include <proc/thread.h>
#include <arch/mm/tlb.h>
#include <genarch/ofw/ofw_tree.h>
#include <arch.h>
#include <panic.h>
#include <string.h>
#include <print.h>

#define KEYBOARD_POLL_PAUSE     50000   /* 50ms */

/**
 * Initialize kernel console to use framebuffer and keyboard directly.
 * Called on UltraSPARC machines with standard keyboard and framebuffer.
 *
 * @param aliases       the "/aliases" OBP node 
 */
static void standard_console_init(ofw_tree_node_t *aliases)
{
#ifdef CONFIG_FB
        ofw_tree_property_t *prop;
        ofw_tree_node_t *screen;
        ofw_tree_node_t *keyboard;
        
        prop = ofw_tree_getprop(aliases, "screen");
        if (!prop)
                panic("Cannot find property 'screen'.");
        if (!prop->value)
                panic("Cannot find screen alias.");
        screen = ofw_tree_lookup(prop->value);
        if (!screen)
                panic("Cannot find %s.", prop->value);

        scr_init(screen);

        prop = ofw_tree_getprop(aliases, "keyboard");
        if (!prop)
                panic("Cannot find property 'keyboard'.");
        if (!prop->value)
                panic("Cannot find keyboard alias.");
        keyboard = ofw_tree_lookup(prop->value);
        if (!keyboard)
                panic("Cannot find %s.", prop->value);

        kbd_init(keyboard);
#else
        panic("Standard console requires FB, "
              "but the kernel is not compiled with FB support.");
#endif
}

/** Initilize I/O on the Serengeti machine. */
static void serengeti_init(void)
{
        sgcn_init();
}

/**
 * Initialize input/output. Auto-detects the type of machine
 * and calls the appropriate I/O init routine. 
 */
void standalone_sparc64_console_init(void)
{
        ofw_tree_node_t *aliases;
        ofw_tree_property_t *prop;
        
        aliases = ofw_tree_lookup("/aliases");
        if (!aliases)
                panic("Cannot find '/aliases'.");
        
        /* "def-cn" = "default console" */
        prop = ofw_tree_getprop(aliases, "def-cn");
        
        if ((!prop) || (!prop->value) || (strcmp(prop->value, "/sgcn") != 0)) {
                standard_console_init(aliases);
        } else {
                serengeti_init();
        }
}


/** Kernel thread for polling keyboard.
 *
 * @param arg Ignored.
 */
void kkbdpoll(void *arg)
{
        thread_detach(THREAD);

        if (kbd_type != KBD_SGCN)
                return;

        while (1) {
#ifdef CONFIG_SGCN
                if (kbd_type == KBD_SGCN)
                        sgcn_poll();
#endif
                thread_usleep(KEYBOARD_POLL_PAUSE);
        }
}

/** Acquire console back for kernel
 *
 */
void arch_grab_console(void)
{
#ifdef CONFIG_FB
        scr_redraw();
#endif
        switch (kbd_type) {
#ifdef CONFIG_SGCN
        case KBD_SGCN:
                sgcn_grab();
                break;
#endif
        default:
                break;
        }
}

/** Return console to userspace
 *
 */
void arch_release_console(void)
{
        switch (kbd_type) {
#ifdef CONFIG_SGCN
        case KBD_SGCN:
                sgcn_release();
                break;
#endif
        default:
                break;
        }
}

/** @}
 */