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/* $Id: drv_PHAnderson.c 840 2008-11-19 23:56:42 guimli $
 * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_PHAnderson.c $
 *
 * driver for the PHAnderson serial-to-HD44780 adapter boards
 * http://www.phanderson.com/lcd106/lcd107.html
 * http://moderndevice.com/Docs/LCD117CommandSummary.doc
 * http://wulfden.org/TheShoppe/k107/index.shtml
 *
 * Copyright (C) 2008 Nicolas Weill <guimli@free.fr>
 * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LCD4Linux is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/* 
 *
 * exported fuctions:
 *
 * struct DRIVER drv_PHAnderson
 *
 */

#include "config.h"

#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include "debug.h"
#include "cfg.h"
#include "qprintf.h"
#include "udelay.h"
#include "plugin.h"
#include "widget.h"
#include "widget_text.h"
#include "widget_icon.h"
#include "widget_bar.h"
#include "drv.h"
#include "drv_generic_text.h"
#include "drv_generic_serial.h"

#define PHAnderson_CMD  '?'

static char Name[] = "PHAnderson";

static int T_READ, T_WRITE, T_BOOT;


/****************************************/
/***  hardware dependant functions    ***/
/****************************************/

static int drv_PHAnderson_open(const char *section)
{
    if (drv_generic_serial_open(section, Name, 0) < 0)
	return -1;

    return 0;
}


static int drv_PHAnderson_close(void)
{
    drv_generic_serial_close();

    return 0;
}


static void drv_PHAnderson_send(const char *data, const unsigned int len)
{
    char buffer[255];
    unsigned int i, j;

    j = 0;
    for (i = 0; i < len; i++) {
	if (data[i] < 8) {
	    buffer[j++] = '?';
	    buffer[j++] = '0' + data[i];
	    drv_generic_serial_write(buffer, j);
	    udelay(T_READ);

	    j = 0;
	} else {
	    buffer[j++] = data[i];
	}
    }

    if (j > 0) {
	drv_generic_serial_write(buffer, j);
    }
}


static void drv_PHAnderson_clear(void)
{
    char cmd[2];

    cmd[0] = '?';
    cmd[1] = 'f';
    drv_PHAnderson_send(cmd, 2);
}


static void drv_PHAnderson_write(const int row, const int col, const char *data, int len)
{
    char cmd[7];

    cmd[0] = '?';
    cmd[1] = 'y';
    cmd[2] = row + '0';
    cmd[3] = '?';
    cmd[4] = 'x';
    cmd[5] = col / 10 + '0';
    cmd[6] = col % 10 + '0';
    drv_PHAnderson_send(cmd, 7);

    drv_PHAnderson_send(data, len);
}


static void drv_PHAnderson_defchar(const int ascii, const unsigned char *matrix)
{
    char cmd[19];
    int i;

    cmd[0] = '?';
    cmd[1] = 'D';
    cmd[2] = ascii + '0';

    for (i = 0; i < 8; i++) {
	cmd[i * 2 + 3] = ((matrix[i] >> 4) & 1) + '0';
	cmd[i * 2 + 4] = (((matrix[i] & 0x0F) < 10) ? (matrix[i] & 0x0F) + '0' : (matrix[i] & 0x0F) + '7');
    }
    drv_PHAnderson_send(cmd, 19);
    udelay(T_WRITE);
}


static int drv_PHAnderson_blacklight(int blacklight)
{
    char cmd[4];

    if (blacklight < 0)
	blacklight = 0;
    if (blacklight > 255)
	blacklight = 255;

    cmd[0] = '?';
    cmd[1] = 'B';
    cmd[2] = (((blacklight >> 4) < 10) ? (blacklight >> 4) + '0' : (blacklight >> 4) + '7');
    cmd[3] = (((blacklight & 0x0F) < 10) ? (blacklight & 0x0F) + '0' : (blacklight & 0x0F) + '7');
    drv_PHAnderson_send(cmd