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1339 cejka 1 
/*
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 * Copyright (C) 2006 Josef Cejka
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 * 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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#include <ipc.h>
1343 jermar 30 
#include <services.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <ns.h>
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#include <errno.h>
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#include <arch/kbd.h>
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#include <kbd.h>
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#include <key_buffer.h>
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#include <fifo.h>
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#define NAME "KBD"
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#define KBD_REQUEST_MAX 32 /**< Maximum requests buffered until keypress */
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int main(int argc, char **argv)
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{
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    ipc_call_t call;
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    ipc_callid_t callid;
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    char connected = 0;
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    int res;
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    int c;
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    ipcarg_t phonead;
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    ipcarg_t retval, arg1, arg2;
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    fifo_count_t callers_counter = 0;
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    FIFO_INITIALIZE_STATIC(callers_buffer, ipc_callid_t, KBD_REQUEST_MAX);
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    printf("Uspace kbd service started.\n");
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    /* Initialize arch dependent parts */
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    if (!(res = kbd_arch_init())) {
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            printf("Kbd registration failed with retval %d.\n", res);
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            return -1;
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            };
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    /* Initialize key buffer */
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    key_buffer_init();
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    /* Register service at nameserver */
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    printf("%s: Registering at naming service.\n", NAME);
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    if ((res = ipc_connect_to_me(PHONE_NS, SERVICE_KEYBOARD, 0, &phonead)) != 0) {
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        printf("%s: Error: Registering at naming service failed.\n", NAME);
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        return -1;
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    };
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    while (1) {
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        callid = ipc_wait_for_call(&call, 0);
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    //  printf("%s:Call phone=%lX..", NAME, call.in_phone_hash);
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        switch (IPC_GET_METHOD(call)) {
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        case IPC_M_PHONE_HUNGUP:
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            if (connected) {
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                if (--connected == 0) {
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                    callers_counter = 0;
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                    callers_buffer.head = callers_buffer.tail = 0;
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                    key_buffer_free(); 
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                }
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            }
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            printf("%s: Phone hung up.\n", NAME);
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            retval = 0;
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            break;
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        case IPC_M_CONNECT_TO_ME:
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            printf("%s: Somebody connecting phid=%zd.\n", NAME, IPC_GET_ARG3(call));
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            retval = 0;
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            break;
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        case IPC_M_CONNECT_ME_TO:
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        //  printf("%s: Connect me (%P) to: %zd\n",NAME, IPC_GET_ARG3(call), IPC_GET_ARG1(call));
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            if (connected) {
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                retval = ELIMIT;
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            } else {
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                retval = 0;
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                connected = 1;
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            }
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            break;
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        case IPC_M_INTERRUPT:
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            if (connected) {
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                kbd_arch_process(IPC_GET_ARG2(call));
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            }
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            //printf("%s: GOT INTERRUPT: %c\n", NAME, IPC_GET_ARG2(call));
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            if (!callers_counter)
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                break;
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            /* Small trick - interrupt does not need answer so we can change callid to caller awaiting key */
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            callers_counter--;
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            callid = fifo_pop(callers_buffer);
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        case KBD_GETCHAR:
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//          printf("%s: Getchar: ", NAME);
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            retval = 0;
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            arg1 = 0;  
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            if (!key_buffer_pop((char *)&arg1)) {
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                if (callers_counter < KBD_REQUEST_MAX) {
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                    callers_counter++;
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                    fifo_push(callers_buffer, callid);
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                } else {
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                    retval = ELIMIT;
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                }
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                continue;
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            };
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            arg2 = 0xbeef;
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        //  printf("GetChar return %c\n", arg1);
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            break;
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        default:
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            printf("%s: Unknown method: %zd\n", NAME, IPC_GET_METHOD(call));
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            retval = ENOENT;
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            break;
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        }
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        if (! (callid & IPC_CALLID_NOTIFICATION)) {
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        //  printf("%s: Answering\n", NAME);
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            ipc_answer_fast(callid, retval, arg1, arg2);
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        }
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    }
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}