generic/kbd.c

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/*
 * Copyright (C) 2006 Josef Cejka
 * 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/ipc.h>
#include <ipc/services.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <ipc/ns.h>
#include <errno.h>
#include <arch/kbd.h>
#include <kbd.h>
#include <libadt/fifo.h>
#include <key_buffer.h>
#include <async.h>
#include <keys.h>

#define NAME "KBD"

int cons_connected = 0;
int phone2cons = -1;
keybuffer_t keybuffer;  

static void irq_handler(ipc_callid_t iid, ipc_call_t *call)
{
        int chr;

#ifdef MOUSE_ENABLED
        if (mouse_arch_process(phone2cons, call))
                return;
#endif
        
        kbd_arch_process(&keybuffer, call);

        if (cons_connected && phone2cons != -1) {
                /* recode to ASCII - one interrupt can produce more than one code so result is stored in fifo */
                while (!keybuffer_empty(&keybuffer)) {
                        if (!keybuffer_pop(&keybuffer, (int *)&chr))
                                break;

                        async_msg(phone2cons, KBD_PUSHCHAR, chr);
                }
        }
}

static void console_connection(ipc_callid_t iid, ipc_call_t *icall)
{
        ipc_callid_t callid;
        ipc_call_t call;
        int retval;

        if (cons_connected) {
                ipc_answer_fast(iid, ELIMIT, 0, 0);
                return;
        }
        cons_connected = 1;
        ipc_answer_fast(iid, 0, 0, 0);

        while (1) {
                callid = async_get_call(&call);
                switch (IPC_GET_METHOD(call)) {
                case IPC_M_PHONE_HUNGUP:
                        cons_connected = 0;
                        ipc_hangup(phone2cons);
                        phone2cons = -1;
                        ipc_answer_fast(callid, 0,0,0);
                        return;
                case IPC_M_CONNECT_TO_ME:
                        if (phone2cons != -1) {
                                retval = ELIMIT;
                                break;
                        }
                        phone2cons = IPC_GET_ARG3(call);
                        retval = 0;
                        break;
                default:
                        retval = EINVAL;
                }
                ipc_answer_fast(callid, retval, 0, 0);
        }       
}


int main(int argc, char **argv)
{
        ipcarg_t phonead;
        
        /* Initialize arch dependent parts */
        if (kbd_arch_init())
                return -1;
        
        /* Initialize key buffer */
        keybuffer_init(&keybuffer);
        
        async_set_client_connection(console_connection);
        async_set_interrupt_received(irq_handler);
        /* Register service at nameserver */
        if (ipc_connect_to_me(PHONE_NS, SERVICE_KEYBOARD, 0, &phonead) != 0)
                return -1;

        async_manager();

        /* Never reached */
        return 0;
}

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