pl050.c

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/*
 * Copyright (c) 2009 Vineeth Pillai
 * 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.
 */

#include <ddi.h>
#include <libarch/ddi.h>
#include <async.h>
#include <unistd.h>
#include <sysinfo.h>
#include <kbd_port.h>
#include <kbd.h>
#include <ddi.h>
#include <stdio.h>
#include <errno.h>

#define PL050_STAT_RXFULL  (1 << 4)

static irq_cmd_t pl050_cmds[] = {
        {
                .cmd = CMD_PIO_READ_8,
                .addr = NULL,
                .dstarg = 1
        },
        {
                .cmd = CMD_BTEST,
                .value = PL050_STAT_RXFULL,
                .srcarg = 1,
                .dstarg = 3
        },
        {
                .cmd = CMD_PREDICATE,
                .value = 2,
                .srcarg = 3
        },
        {
                .cmd = CMD_PIO_READ_8,
                .addr = NULL,  /* Will be patched in run-time */
                .dstarg = 2
        },
        {
                .cmd = CMD_ACCEPT
        }
};

static irq_code_t pl050_kbd = {
        sizeof(pl050_cmds) / sizeof(irq_cmd_t),
        pl050_cmds
};

static void pl050_irq_handler(ipc_callid_t iid, ipc_call_t *call);

int kbd_port_init(void)
{
        sysarg_t addr;
        if (sysinfo_get_value("kbd.address.status", &addr) != EOK)
                return -1;
        
        pl050_kbd.cmds[0].addr = (void *) addr;
        
        if (sysinfo_get_value("kbd.address.data", &addr) != EOK)
                return -1;
        
        pl050_kbd.cmds[3].addr = (void *) addr;
        
        sysarg_t inr;
        if (sysinfo_get_value("kbd.inr", &inr) != EOK)
                return -1;
        
        async_set_interrupt_received(pl050_irq_handler);
        register_irq(inr, device_assign_devno(), 0, &pl050_kbd);
        
        return 0;
}

void kbd_port_yield(void)
{
}

void kbd_port_reclaim(void)
{
}

void kbd_port_write(uint8_t data)
{
        (void) data;
}

static void pl050_irq_handler(ipc_callid_t iid, ipc_call_t *call)
{
        int scan_code = IPC_GET_ARG2(*call);

        kbd_push_scancode(scan_code);
        return;
}

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