z8530.c

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/*
 * Copyright (c) 2006 Martin Decky
 * 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 <ipc/irc.h>
#include <async.h>
#include <sysinfo.h>
#include <kbd.h>
#include <kbd_port.h>
#include <sun.h>
#include <sys/types.h>
#include <ddi.h>
#include <errno.h>

#define CHAN_A_STATUS  4
#define CHAN_A_DATA    6

#define RR0_RCA  1

static irq_cmd_t z8530_cmds[] = {
        {
                .cmd = CMD_PIO_READ_8,
                .addr = (void *) 0,     /* Will be patched in run-time */
                .dstarg = 1
        },
        {
                .cmd = CMD_BTEST,
                .value = RR0_RCA,
                .srcarg = 1,
                .dstarg = 3
        },
        {
                .cmd = CMD_PREDICATE,
                .value = 2,
                .srcarg = 3
        },
        {
                .cmd = CMD_PIO_READ_8,
                .addr = (void *) 0,     /* Will be patched in run-time */
                .dstarg = 2
        },
        {
                .cmd = CMD_ACCEPT
        }
};
        
irq_code_t z8530_kbd = {
        sizeof(z8530_cmds) / sizeof(irq_cmd_t),
        z8530_cmds
};

static void z8530_irq_handler(ipc_callid_t iid, ipc_call_t *call);

int z8530_port_init(void)
{
        sysarg_t kaddr;
        if (sysinfo_get_value("kbd.address.kernel", &kaddr) != EOK)
                return -1;
        
        sysarg_t inr;
        if (sysinfo_get_value("kbd.inr", &inr) != EOK)
                return -1;
        
        z8530_cmds[0].addr = (void *) kaddr + CHAN_A_STATUS;
        z8530_cmds[3].addr = (void *) kaddr + CHAN_A_DATA;
        
        async_set_interrupt_received(z8530_irq_handler);
        register_irq(inr, device_assign_devno(), inr, &z8530_kbd);
        
        return 0;
}

static void z8530_irq_handler(ipc_callid_t iid, ipc_call_t *call)
{
        int scan_code = IPC_GET_ARG2(*call);
        kbd_push_scancode(scan_code);
        
        if (irc_service)
                async_msg_1(irc_phone, IRC_CLEAR_INTERRUPT,
                    IPC_GET_IMETHOD(*call));
}

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