1 files changed, 100 insertions, 0 deletions
diff --git a/drv_generic_parport.h b/drv_generic_parport.h
new file mode 100644
index 0000000..603badb
--- /dev/null
+++ b/drv_generic_parport.h
@@ -0,0 +1,100 @@
+/* $Id: drv_generic_parport.h 840 2007-09-09 12:17:42Z michael $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_generic_parport.h $
+ *
+ * generic driver helper for parallel port displays
+ *
+ * Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at>
+ * Copyright (C) 2004 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:
+ *
+ * int drv_generic_parport_open (void)
+ *   reads 'Port' entry from config and opens
+ *   the parallel port
+ *   returns 0 if ok, -1 on failure
+ *
+ * int drv_generic_parport_close (void)
+ *   closes parallel port
+ *   returns 0 if ok, -1 on failure
+ *
+ * unsigned char drv_generic_parport_wire_ctrl (char *name, char *deflt)
+ *   reads wiring for one control signal from config
+ *   returns DRV_GENERIC_PARPORT_CONTROL_* or 255 on error
+ *
+ * unsigned char drv_generic_parport_hardwire_ctrl (char *name)
+ *   returns hardwiring for one control signal
+ *   same as above, but does not read from config,
+ *   but checks the config and emits a warning that the config
+ *   entry will be ignored
+ *   returns DRV_GENERIC_PARPORT_CONTROL_* or 255 on error
+ *
+ * unsigned char drv_generic_parport_wire_status (char *name, char *deflt)
+ *   reads wiring for one status signal from config
+ *   returns DRV_GENERIC_PARPORT_STATUS_* or 255 on error
+ *
+ * unsigned char drv_generic_parport_wire_data (char *name, char *deflt)
+ *   reads wiring for one data signal from config
+ *   returns 1<<bitpos or 255 on error
+ *
+ * void drv_generic_parport_direction (int direction)
+ *   0 - write to parport
+ *   1 - read from parport
+ *
+ * unsigned char drv_generic_parport_status (void)
+ *   reads control lines
+ *
+ * void drv_generic_parport_control (unsigned char mask, unsigned char value)
+ *   frobs control line and takes care of inverted signals
+ *
+ * void drv_generic_parport_toggle (unsigned char bit, int level, int delay)
+ *   toggles the line <bit> to <level> for <delay> nanoseconds
+ *
+ * void drv_generic_parport_data (unsigned char value)
+ *   put data bits on DB1..DB8
+ *
+ * unsigned char drv_generic_parport_read (void)
+ *   reads a byte from the parallel port
+ *
+ * void drv_generic_parport_debug(void)
+ *   prints status of control lines
+ *
+ */
+
+#ifndef _DRV_GENERIC_PARPORT_H_
+#define _DRV_GENERIC_PARPORT_H_
+
+int drv_generic_parport_open(const char *section, const char *driver);
+int drv_generic_parport_close(void);
+unsigned char drv_generic_parport_wire_ctrl(const char *name, const char *deflt);
+unsigned char drv_generic_parport_hardwire_ctrl(const char *name, const char *deflt);
+unsigned char drv_generic_parport_wire_status(const char *name, const char *deflt);
+unsigned char drv_generic_parport_wire_data(const char *name, const char *deflt);
+void drv_generic_parport_direction(const int direction);
+unsigned char drv_generic_parport_status(void);
+void drv_generic_parport_control(const unsigned char mask, const unsigned char value);
+void drv_generic_parport_toggle(const unsigned char bit, const int level, const unsigned long delay);
+void drv_generic_parport_data(const unsigned char data);
+unsigned char drv_generic_parport_read(void);
+void drv_generic_parport_debug(void);
+
+#endif