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/*

 * Copyright (C) 2006 Ondrej Palkovsky

 * 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 <align.h>

#include <async.h>

#include <ipc/ipc.h>

#include <errno.h>

#include <stdio.h>

#include <ddi.h>

#include <sysinfo.h>

#include <as.h>

#include <ipc/fb.h>

#include <ipc/ipc.h>

#include <ipc/ns.h>

#include <ipc/services.h>

#include "ega.h"

#include "../console/screenbuffer.h"

#include "main.h"

/* Allow only 1 connection */

static int client_connected = 0;

static unsigned int scr_width;

static unsigned int scr_height;

static char *scr_addr;

static unsigned int style = 0x0f;

static void clrscr(void)

{

	int i;

	for (i=0; i < scr_width*scr_height; i++) {

		scr_addr[i*2] = ' ';

		scr_addr[i*2+1] = style;

	}

}

static void printchar(char c, unsigned int row, unsigned int col)

{

	scr_addr[(row*scr_width + col)*2] = c;

	scr_addr[(row*scr_width + col)*2+1] = style;

}

static void draw_text_data(keyfield_t *data)

{

	int i;

	for (i=0; i < scr_width*scr_height; i++) {

		scr_addr[i*2] = data[i].character;

		if (data[i].style.fg_color > data[i].style.bg_color)

			scr_addr[i*2+1] = 0x0f;

		else

			scr_addr[i*2+1] = 0xf0;

	}

}

static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)

{

	int retval;

	ipc_callid_t callid;

	ipc_call_t call;

	char c;

	unsigned int row, col;

	int bgcolor,fgcolor;

	keyfield_t *interbuf = NULL;

	size_t intersize = 0;

	if (client_connected) {

		ipc_answer_fast(iid, ELIMIT, 0,0);

		return;

	}

	client_connected = 1;

	ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */

	while (1) {

		callid = async_get_call(&call);

 		switch (IPC_GET_METHOD(call)) {

		case IPC_M_PHONE_HUNGUP:

			client_connected = 0;

			ipc_answer_fast(callid,0,0,0);

			return; /* Exit thread */

		case IPC_M_AS_AREA_SEND:

			/* We accept one area for data interchange */

			intersize = IPC_GET_ARG2(call);

			if (intersize >= scr_width*scr_height*sizeof(*interbuf)) {

				receive_comm_area(callid,&call,(void **)&interbuf, scr_width*scr_height*sizeof(*interbuf));

				continue;

			}

			retval = EINVAL;

			break;

		case FB_DRAW_TEXT_DATA:

			if (!interbuf) {

				retval = EINVAL;

				break;

			}

			draw_text_data(interbuf);

			retval = 0;

			break;

		case FB_GET_CSIZE:

			ipc_answer_fast(callid, 0, scr_height, scr_width);

			continue;

		case FB_CLEAR:

			clrscr();

			retval = 0;

			break;

		case FB_PUTCHAR:

			c = IPC_GET_ARG1(call);

			row = IPC_GET_ARG2(call);

			col = IPC_GET_ARG3(call);

			if (col >= scr_width || row >= scr_height) {

				retval = EINVAL;

				break;

			}

			printchar(c,row,col);

			retval = 0;

			break;

		case FB_SET_STYLE:

			fgcolor = IPC_GET_ARG1(call);

			bgcolor = IPC_GET_ARG2(call);

			if (fgcolor > bgcolor)

				style = 0x0f;

			else

				style = 0xf0;

		default:

			retval = ENOENT;

		}

		ipc_answer_fast(callid,retval,0,0);

	}

}

int ega_init(void)

{

	void *ega_ph_addr;

	size_t sz;

	ega_ph_addr=(void *)sysinfo_value("fb.address.physical");

	scr_width=sysinfo_value("fb.width");

	scr_height=sysinfo_value("fb.height");

	sz = scr_width*scr_height*2;

	scr_addr = as_get_mappable_page(sz);

	map_physmem(ega_ph_addr, scr_addr, ALIGN_UP(sz,PAGE_SIZE)>>PAGE_WIDTH,

		    AS_AREA_READ | AS_AREA_WRITE);

	async_set_client_connection(ega_client_connection);

	clrscr();

	return 0;

}