source: mainline/uspace/srv/kbd/generic/kbd.c@ 0f74869

/*
 * 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.
 */

/**
 * @addtogroup kbdgen generic
 * @brief       HelenOS generic uspace keyboard handler.
 * @ingroup  kbd
 * @{
 */ 
/** @file
 */

#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 <async.h>
#include <errno.h>
#include <libadt/fifo.h>
#include <kbd/kbd.h>
#include <kbd/keycode.h>

#include <kbd.h>
#include <key_buffer.h>
#include <kbd_port.h>
#include <kbd_ctl.h>
#include <layout.h>

#define NAME "kbd"

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

/** Currently active modifiers. */
static unsigned mods = KM_NUM_LOCK;

/** Currently pressed lock keys. We track these to tackle autorepeat. */
static unsigned lock_keys;

void kbd_push_scancode(int scancode)
{
/*      printf("scancode: 0x%x\n", scancode);*/
        kbd_ctl_parse_scancode(scancode);
}

void kbd_push_ev(int type, unsigned int key)
{
        kbd_event_t ev;
        unsigned mod_mask;

        switch (key) {
        case KC_LCTRL: mod_mask = KM_LCTRL; break;
        case KC_RCTRL: mod_mask = KM_RCTRL; break;
        case KC_LSHIFT: mod_mask = KM_LSHIFT; break;
        case KC_RSHIFT: mod_mask = KM_RSHIFT; break;
        case KC_LALT: mod_mask = KM_LALT; break;
        case KC_RALT: mod_mask = KM_RALT; break;
        default: mod_mask = 0; break;
        }

        if (mod_mask != 0) {
                if (type == KE_PRESS)
                        mods = mods | mod_mask;
                else
                        mods = mods & ~mod_mask;
        }

        switch (key) {
        case KC_CAPS_LOCK: mod_mask = KM_CAPS_LOCK; break;
        case KC_NUM_LOCK: mod_mask = KM_NUM_LOCK; break;
        case KC_SCROLL_LOCK: mod_mask = KM_SCROLL_LOCK; break;
        default: mod_mask = 0; break;
        }

        if (mod_mask != 0) {
                if (type == KE_PRESS) {
                        /*
                         * Only change lock state on transition from released
                         * to pressed. This prevents autorepeat from messing
                         * up the lock state.
                         */
                        mods = mods ^ (mod_mask & ~lock_keys);
                        lock_keys = lock_keys | mod_mask;
                } else {
                        lock_keys = lock_keys & ~mod_mask;
                }
        }
/*
        printf("type: %d\n", type);
        printf("mods: 0x%x\n", mods);
        printf("keycode: %u\n", key);
*/
        ev.type = type;
        ev.key = key;
        ev.mods = mods;

        ev.c = layout_parse_ev(&ev);

        async_msg_4(phone2cons, KBD_EVENT, ev.type, ev.key, ev.mods, ev.c);
}

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_0(iid, ELIMIT);
                return;
        }
        cons_connected = 1;
        ipc_answer_0(iid, EOK);

        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_0(callid, EOK);
                        return;
                case IPC_M_CONNECT_TO_ME:
                        if (phone2cons != -1) {
                                retval = ELIMIT;
                                break;
                        }
                        phone2cons = IPC_GET_ARG5(call);
                        retval = 0;
                        break;
                default:
                        retval = EINVAL;
                }
                ipc_answer_0(callid, retval);
        }       
}


int main(int argc, char **argv)
{
        printf(NAME ": HelenOS Keyboard service\n");
        
        ipcarg_t phonead;
        
        /* Initialize port driver. */
        if (kbd_port_init())
                return -1;
        
        /* Initialize key buffer */
        keybuffer_init(&keybuffer);
        
        async_set_client_connection(console_connection);

        /* Register service at nameserver. */
        if (ipc_connect_to_me(PHONE_NS, SERVICE_KEYBOARD, 0, 0, &phonead) != 0)
                return -1;
        
        printf(NAME ": Accepting connections\n");
        async_manager();

        /* Not reached. */
        return 0;
}

/**
 * @}
 */