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Diffstat (limited to 'drv_LCDLinux.h')
| -rw-r--r-- | drv_LCDLinux.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/drv_LCDLinux.h b/drv_LCDLinux.h new file mode 100644 index 0000000..6bdf1f1 --- /dev/null +++ b/drv_LCDLinux.h @@ -0,0 +1,92 @@ +/* lcd.h + * + * $Id: drv_LCDLinux.h,v 1.1 2005/04/09 07:36:42 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 "0.8.8" /* 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_READ_ON 0x0002 /* Enable the read functions */ +#define LCD_ETTY_ON 0x0004 /* Enable the tty support */ +#define LCD_CONSOLE 0x0008 /* Enable the console support */ +#define LCD_4BITS_BUS 0x0010 /* Set the bus length to 4 bits */ +#define LCD_5X10_FONT 0x0020 /* Use 5x10 dots fonts */ + + + +#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 */ |