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/*

 * 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 ia64   

 * @{

 */

/** @file

 */

#include <arch/ski/ski.h>

#include <console/console.h>

#include <console/chardev.h>

#include <sysinfo/sysinfo.h>

#include <arch/types.h>

#include <proc/thread.h>

#include <synch/spinlock.h>

#include <arch/asm.h>

#include <arch/drivers/kbd.h>

#include <arch.h>

static indev_t skiin;       /**< Ski input device. */

static outdev_t skiout;     /**< Ski output device. */

static bool kbd_disabled;

/** Display character on debug console

 *

 * Use SSC (Simulator System Call) to

 * display character on debug console.

 *

 * @param d Character device.

 * @param ch Character to be printed.

 */

static void ski_putchar(outdev_t *d, const char ch, bool silent)

{

    if (!silent) {

        asm volatile (

            "mov r15 = %0\n"

            "mov r32 = %1\n"   /* r32 is in0 */

            "break 0x80000\n"  /* modifies r8 */

            :

            : "i" (SKI_PUTCHAR), "r" (ch)

            : "r15", "in0", "r8"

        );

        if (ch == '\n')

            ski_putchar(d, '\r', false);

    }

}

static indev_operations_t skiin_ops = {

    .poll = NULL

};

static outdev_operations_t skiout_ops = {

    .write = ski_putchar

};

/** Ask debug console if a key was pressed.

 *

 * Use SSC (Simulator System Call) to

 * get character from debug console.

 *

 * This call is non-blocking.

 *

 * @return ASCII code of pressed key or 0 if no key pressed.

 */

static int32_t ski_getchar(void)

{

    uint64_t ch;

    asm volatile (

        "mov r15 = %1\n"

        "break 0x80000;;\n" /* modifies r8 */

        "mov %0 = r8;;\n"      

        : "=r" (ch)

        : "i" (SKI_GETCHAR)

        : "r15", "r8"

    );

    return (int32_t) ch;

}

/** Ask keyboard if a key was pressed. */

static void poll_keyboard(void)

{

    char ch;

    if (kbd_disabled)

        return;

    ch = ski_getchar();

    if(ch == '\r')

        ch = '\n';

    if (ch) {

        indev_push_character(&skiin, ch);

        return;

    }

}

#define POLL_INTERVAL           10000           /* 10 ms */

/** Kernel thread for polling keyboard. */

static void kkbdpoll(void *arg)

{

    while (1) {

        if (!silent) {

            poll_keyboard();

        }

        thread_usleep(POLL_INTERVAL);

    }

}

/** Initialize debug console

 *

 * Issue SSC (Simulator System Call) to

 * to open debug console.

 */

static void ski_init(void)

{

    static bool initialized;

    if (initialized)

        return;

    asm volatile (

        "mov r15 = %0\n"

        "break 0x80000\n"

        :

        : "i" (SKI_INIT_CONSOLE)

        : "r15", "r8"

    );

    initialized = true;

}

indev_t *skiin_init(void)

{

    ski_init();

    indev_initialize("skiin", &skiin, &skiin_ops);

    thread_t *t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll", true);

    if (t)

        thread_ready(t);

    else

        return NULL;

    sysinfo_set_item_val("kbd", NULL, true);

    sysinfo_set_item_val("kbd.type", NULL, KBD_SKI);

    return &skiin;

}

void skiout_init(void)

{

    ski_init();

    outdev_initialize("skiout", &skiout, &skiout_ops);

    stdout = &skiout;

    sysinfo_set_item_val("fb", NULL, false);

}

void ski_kbd_grab(void)

{

    kbd_disabled = true;

}

void ski_kbd_release(void)

{

    kbd_disabled = false;

}

/** @}

 */