[PATCH] drivers: add LCD support

Add support for auxiliary displays, the ks0108 LCD controller, the
cfag12864b LCD and adds a framebuffer device: cfag12864bfb.

- Add a "auxdisplay/" folder in "drivers/" for auxiliary display
  drivers.

- Add support for the ks0108 LCD Controller as a device driver.  (uses
  parport interface)

- Add support for the cfag12864b LCD as a device driver.  (uses ks0108
  LCD Controller driver)

- Add a framebuffer device called cfag12864bfb.  (uses cfag12864b LCD
  driver)

- Add the usual Documentation, includes, Makefiles, Kconfigs,
  MAINTAINERS, CREDITS...

- Miguel Ojeda will maintain all the stuff above.

[rdunlap@xenotime.net: workqueue fixups]
[akpm@osdl.org: kconfig fix]
Signed-off-by: Miguel Ojeda Sandonis <maxextreme@gmail.com>
Cc: Greg KH <greg@kroah.com>
Acked-by: Paulo Marques <pmarques@grupopie.com>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 123 insertions, 0 deletions

diff --git a/include/linux/cfag12864b.h b/include/linux/cfag12864b.h
new file mode 100644
index 00000000000..0bc45e69da5
--- /dev/null
+++ b/include/linux/cfag12864b.h
@@ -0,0 +1,77 @@
+/*
+ *    Filename: cfag12864b.h
+ *     Version: 0.1.0
+ * Description: cfag12864b LCD driver header
+ *     License: GPLv2
+ *
+ *      Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ *        Date: 2006-10-12
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  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 _CFAG12864B_H_
+#define _CFAG12864B_H_
+
+#define CFAG12864B_WIDTH	(128)
+#define CFAG12864B_HEIGHT	(64)
+#define CFAG12864B_CONTROLLERS	(2)
+#define CFAG12864B_PAGES	(8)
+#define CFAG12864B_ADDRESSES	(64)
+#define CFAG12864B_SIZE		((CFAG12864B_CONTROLLERS) * \
+				(CFAG12864B_PAGES) * \
+				(CFAG12864B_ADDRESSES))
+
+/*
+ * The driver will blit this buffer to the LCD
+ *
+ * Its size is CFAG12864B_SIZE.
+ */
+extern unsigned char * cfag12864b_buffer;
+
+/*
+ * Get the refresh rate of the LCD
+ *
+ * Returns the refresh rate (hertzs).
+ */
+extern unsigned int cfag12864b_getrate(void);
+
+/*
+ * Enable refreshing
+ *
+ * Returns 0 if successful (anyone was using it),
+ * or != 0 if failed (someone is using it).
+ */
+extern unsigned char cfag12864b_enable(void);
+
+/*
+ * Disable refreshing
+ *
+ * You should call this only when you finish using the LCD.
+ */
+extern void cfag12864b_disable(void);
+
+/*
+ * Is enabled refreshing? (is anyone using the module?)
+ *
+ * Returns 0 if refreshing is not enabled (anyone is using it),
+ * or != 0 if refreshing is enabled (someone is using it).
+ *
+ * Useful for buffer read-only modules.
+ */
+extern unsigned char cfag12864b_isenabled(void);
+
+#endif /* _CFAG12864B_H_ */
+
diff --git a/include/linux/ks0108.h b/include/linux/ks0108.h
new file mode 100644
index 00000000000..8047d4b17bf
--- /dev/null
+++ b/include/linux/ks0108.h
@@ -0,0 +1,46 @@
+/*
+ *    Filename: ks0108.h
+ *     Version: 0.1.0
+ * Description: ks0108 LCD Controller driver header
+ *     License: GPLv2
+ *
+ *      Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ *        Date: 2006-10-31
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  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 _KS0108_H_
+#define _KS0108_H_
+
+/* Write a byte to the data port */
+extern void ks0108_writedata(unsigned char byte);
+
+/* Write a byte to the control port */
+extern void ks0108_writecontrol(unsigned char byte);
+
+/* Set the controller's current display state (0..1) */
+extern void ks0108_displaystate(unsigned char state);
+
+/* Set the controller's current startline (0..63) */
+extern void ks0108_startline(unsigned char startline);
+
+/* Set the controller's current address (0..63) */
+extern void ks0108_address(unsigned char address);
+
+/* Set the controller's current page (0..7) */
+extern void ks0108_page(unsigned char page);
+
+#endif /* _KS0108_H_ */