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/* lcd.h
*
* $Id: drv_LCDLinux.h,v 1.4 2005/05/08 04:32:44 reinelt Exp $
*
* LCD driver for HD44780 compatible displays connected to the parallel port.
*
* External interface header file.
*
* Copyright (C) 2004, 2005 Mattia Jona-Lasinio (mjona@users.sourceforge.net)
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef LCD_H
#define LCD_H
#define LCD_LINUX_VERSION "0.8.9-CVS" /* Version number */
#define LCD_MAJOR 120 /* Major number for this device
* Set this to 0 for dynamic allocation
*/
#include <linux/types.h>
struct lcd_driver {
/* Hardware */
unsigned short io; /* Parport base address */
unsigned short flags; /* Flags (see Documentation) */
/* Display geometry */
unsigned short num_cntr; /* Number of available controllers */
unsigned short cntr_rows; /* Rows per controller */
unsigned short disp_cols; /* Columns */
unsigned short frames; /* Framebuffer frames */
unsigned short tabstop; /* Length of tab character */
};
/* IOCTLs */
#include <asm/ioctl.h>
#define IOCTL_SET_PARAM _IOW(LCD_MAJOR, 0, struct lcd_driver *)
#define IOCTL_GET_PARAM _IOR(LCD_MAJOR, 1, struct lcd_driver *)
#define LCD_PROC_ON 0x0001 /* Enable the /proc filesystem support */
#define LCD_ETTY_ON 0x0002 /* Enable the tty support */
#define LCD_CONSOLE 0x0004 /* Enable the console support */
#define LCD_4BITS_BUS 0x0008 /* Set the bus length to 4 bits */
#define LCD_5X10_FONT 0x0010 /* Use 5x10 dots fonts */
#define LCD_CHECK_BF 0x0020 /* Do busy flag checking */
#ifdef __KERNEL__ /* The rest is for kernel only */
#include <linux/version.h>
#ifndef KERNEL_VERSION
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
#endif
#ifndef LINUX_VERSION_CODE
#error - LINUX_VERSION_CODE undefined.
#endif
/* External interface */
int lcd_init(struct lcd_driver *);
void lcd_exit(void);
int lcd_ioctl(unsigned int, void *);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
ssize_t lcd_write(const char *, size_t, unsigned int);
ssize_t lcd_read(char *, size_t, unsigned int);
#else
int lcd_write(const char *, int, unsigned int);
int lcd_read(char *, int, unsigned int);
#endif
#endif /* __KERNEL__ */
#endif /* External interface included */
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