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575 palkovsky 1 
/*
2071 jermar 2 
 * Copyright (c) 2005 Ondrej Palkovsky
575 palkovsky 3 
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1888 jermar 29 
/** @addtogroup mips32 
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 * @{
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 */
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/** @file
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 */
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575 palkovsky 35 
#include <interrupt.h>
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#include <console/chardev.h>
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#include <arch/drivers/msim.h>
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#include <arch/cp0.h>
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#include <console/console.h>
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#include <ddi/irq.h>
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#include <sysinfo/sysinfo.h>
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/** Address of devices. */
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#define MSIM_VIDEORAM       0xB0000000
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#define MSIM_KBD_ADDRESS    0xB0000000
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#define MSIM_KBD_IRQ        2
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static chardev_t console;
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static irq_t msim_irq;
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static void msim_write(chardev_t *dev, const char ch);
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static void msim_enable(chardev_t *dev);
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static void msim_disable(chardev_t *dev);
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static char msim_do_read(chardev_t *dev);
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static chardev_operations_t msim_ops = {
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    .resume = msim_enable,
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    .suspend = msim_disable,
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    .write = msim_write,
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    .read = msim_do_read,
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};
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/** Putchar that works with MSIM & gxemul */
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void msim_write(chardev_t *dev, const char ch)
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{
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    *((char *) MSIM_VIDEORAM) = ch;
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}
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/* Called from getc(). */
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void msim_enable(chardev_t *dev)
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{
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    cp0_unmask_int(MSIM_KBD_IRQ);
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}
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/* Called from getc(). */
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void msim_disable(chardev_t *dev)
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{
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    cp0_mask_int(MSIM_KBD_IRQ);
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}
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588 palkovsky 81 
#include <print.h>
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/** Read character using polling, assume interrupts disabled */
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static char msim_do_read(chardev_t *dev)
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{
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    char ch;
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    while (1) {
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        ch = *((volatile char *) MSIM_KBD_ADDRESS);
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        if (ch) {
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            if (ch == '\r')
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                return '\n';
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            if (ch == 0x7f)
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                return '\b';
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            return ch;
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        }
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    }
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}
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/** Process keyboard interrupt. */
1936 decky 100 
static void msim_irq_handler(irq_t *irq, void *arg, ...)
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{
1936 decky 102 
    if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox))
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        ipc_irq_send_notif(irq);
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    else {
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        char ch = 0;
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            ch = *((char *) MSIM_KBD_ADDRESS);
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            if (ch =='\r')
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                ch = '\n';
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            if (ch == 0x7f)
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                ch = '\b';
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            chardev_push_character(&console, ch);
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    }
575 palkovsky 114 
}
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1936 decky 116 
static irq_ownership_t msim_claim(void)
575 palkovsky 117 
{
1936 decky 118 
    return IRQ_ACCEPT;
575 palkovsky 119 
}
1474 palkovsky 120 
 
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void msim_kbd_grab(void)
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{
1944 jermar 123 
    ipl_t ipl = interrupts_disable();
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    spinlock_lock(&msim_irq.lock);
1936 decky 125 
    msim_irq.notif_cfg.notify = false;
1944 jermar 126 
    spinlock_unlock(&msim_irq.lock);
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    interrupts_restore(ipl);
1474 palkovsky 128 
}
1936 decky 129 
 
1474 palkovsky 130 
void msim_kbd_release(void)
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{
1944 jermar 132 
    ipl_t ipl = interrupts_disable();
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    spinlock_lock(&msim_irq.lock);
1936 decky 134 
    if (msim_irq.notif_cfg.answerbox)
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        msim_irq.notif_cfg.notify = true;
1944 jermar 136 
    spinlock_unlock(&msim_irq.lock);
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    interrupts_restore(ipl);
1474 palkovsky 138 
}
1702 cejka 139 
 
1936 decky 140 
 
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/* Return console object representing msim console */
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void msim_console(devno_t devno)
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{
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    chardev_initialize("msim_console", &console, &msim_ops);
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    stdin = &console;
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    stdout = &console;
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    irq_initialize(&msim_irq);
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    msim_irq.devno = devno;
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    msim_irq.inr = MSIM_KBD_IRQ;
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    msim_irq.claim = msim_claim;
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    msim_irq.handler = msim_irq_handler;
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    irq_register(&msim_irq);
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    cp0_unmask_int(MSIM_KBD_IRQ);
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    sysinfo_set_item_val("kbd", NULL, true);
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    sysinfo_set_item_val("kbd.devno", NULL, devno);
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    sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ);
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    sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS);
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}
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1888 jermar 163 
/** @}
1702 cejka 164 
 */