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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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	/* Counter of unsatisfied calls */
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	fifo_count_t callers_counter = 0;
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	/* Fifo with callid's of unsatisfied calls requred for answer */
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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 nobody's connected, clear keybuffer and dont store new keys */
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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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					printf("%s: Phone hung up.\n", NAME);
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				} else {
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					printf("%s: Oops, got phone hung up, but nobody connected.\n", NAME);
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				}
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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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				/* Only one connected client allowed */
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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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					/* recode scancode and store it into key buffer */
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					kbd_arch_process(IPC_GET_ARG2(call));
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					//printf("%s: GOT INTERRUPT: %c\n", NAME, IPC_GET_ARG2(call));
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					/* Some callers could awaiting keypress - if its true, we have to send keys to them.
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					 * One interrupt can store more than one key into buffer. */
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					retval = 0;
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					arg2 = 0xbeef;
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					while ((callers_counter) && (!key_buffer_empty())) {
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						callers_counter--;
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						if (!key_buffer_pop((char *)&arg1)) {
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							printf("%s: KeyBuffer empty but it should not be.\n");
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							break;
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						}
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						ipc_answer_fast(fifo_pop(callers_buffer), retval, arg1, arg2);
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					}
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				}
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				break;
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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;
1339 cejka 155 
		}
1344 cejka 156 
 
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		if (! (callid & IPC_CALLID_NOTIFICATION)) {
1343 jermar 158 
			ipc_answer_fast(callid, retval, arg1, arg2);
1339 cejka 159 
		}
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	}
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}
1344 cejka 162