diff mbox

[1/3] picolcd: driver for PicoLCD HID device

Message ID 20100224170049.0d04af3c@neptune.home
State New, archived
Delegated to: Jiri Kosina
Headers show

Commit Message

Bruno Prémont Feb. 24, 2010, 4 p.m. UTC
None
diff mbox

Patch

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 24d90ea..55915c8 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -183,6 +183,24 @@  config LOGIRUMBLEPAD2_FF
 	  Say Y here if you want to enable force feedback support for Logitech
 	  Rumblepad 2 devices.
 
+config HID_PICOLCD
+	tristate "Minibox PicoLCD (graphic version)"
+	depends on FB
+	select FB_DEFERRED_IO
+	select FB_SYS_FILLRECT
+	select FB_SYS_COPYAREA
+	select FB_SYS_IMAGEBLIT
+	select FB_SYS_FOPS
+	select BACKLIGHT_LCD_SUPPORT
+	select BACKLIGHT_CLASS_DEVICE
+	select LCD_CLASS_DEVICE
+	help
+	  This provides support for Minibox PicoLCD devices, currently
+	  only the graphical ones are supported. This includes support
+	  for the device as a keypad input with mappable keys as well as
+	  a framebuffer for the LCD display.
+	  Support for the GPIOs and IR is not yet implemented
+
 config HID_MICROSOFT
 	tristate "Microsoft" if EMBEDDED
 	depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 0de2dff..450f09f 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -31,6 +31,7 @@  obj-$(CONFIG_HID_GYRATION)	+= hid-gyration.o
 obj-$(CONFIG_HID_KENSINGTON)	+= hid-kensington.o
 obj-$(CONFIG_HID_KYE)		+= hid-kye.o
 obj-$(CONFIG_HID_LOGITECH)	+= hid-logitech.o
+obj-$(CONFIG_HID_PICOLCD)	+= hid-picolcd.o
 obj-$(CONFIG_HID_MICROSOFT)	+= hid-microsoft.o
 obj-$(CONFIG_HID_MONTEREY)	+= hid-monterey.o
 obj-$(CONFIG_HID_NTRIG)		+= hid-ntrig.o
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index eabe5f8..1db0b3a 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1330,6 +1330,7 @@  static const struct hid_device_id hid_blacklist[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACETRAVELLER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACENAVIGATOR) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_LK6K) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 010368e..fc66622 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -330,6 +330,7 @@ 
 #define USB_VENDOR_ID_MICROCHIP		0x04d8
 #define USB_DEVICE_ID_PICKIT1		0x0032
 #define USB_DEVICE_ID_PICKIT2		0x0033
+#define USB_DEVICE_ID_PICOLCD		0xc002
 
 #define USB_VENDOR_ID_MICROSOFT		0x045e
 #define USB_DEVICE_ID_SIDEWINDER_GV	0x003b
diff --git a/drivers/hid/hid-picolcd.c b/drivers/hid/hid-picolcd.c
index e69de29..90f6be5 100644
--- a/drivers/hid/hid-picolcd.c
+++ b/drivers/hid/hid-picolcd.c
@@ -0,0 +1,1075 @@ 
+/***************************************************************************
+ *   Copyright (C) 2010 by Bruno Prémont <bonbons@linux-vserver.org>       *
+ *                                                                         *
+ *   Based on Logitech G13 driver (v0.4)                                   *
+ *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
+ *                                                                         *
+ *   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.        *
+ *                                                                         *
+ *   This driver 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 software. If not see <http://www.gnu.org/licenses/>.  *
+ ***************************************************************************/
+
+#include <linux/hid.h>
+#include <linux/input.h>
+#include "hid-ids.h"
+#include "usbhid/usbhid.h"
+#include <linux/usb.h>
+
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <linux/lcd.h>
+#include <linux/vmalloc.h>
+
+#include <linux/completion.h>
+
+#define PICOLCD_NAME "PicoLCD (graphic)"
+
+/* Report numbers */
+#define REPORT_BRIGHTNESS   0x91
+#define REPORT_CONTRAST     0x92
+#define REPORT_RESET        0x93
+#define REPORT_LCD_CMD      0x94
+#define REPORT_LCD_DATA     0x95
+#define REPORT_LCD_CMD_DATA 0x96
+#define REPORT_VERSION      0xf1
+#define REPORT_SPLASH_SIZE  0xf6
+#define REPORT_KEYPAD       0x11
+/* Additional features of picoLCD that are not supported yet:
+ *  - CIR
+ *  - GPIO
+ *  - Programming / flashing (full firmware or just splash?)
+ *  - interface to ICSP header?
+ */
+
+/* Framebuffer
+ *
+ * The PicoLCD use a Topway LCD module of 256x64 pixel
+ * This display area is tiled over 4 controllers with 8 tiles
+ * each. Each tile has 8x64 pixel, each data byte representing
+ * a 1-bit wide vertical line of the tile.
+ *
+ * The display can be updated at a tile granularity.
+ *
+ *       Chip 1           Chip 2           Chip 3           Chip 4
+ * +----------------+----------------+----------------+----------------+
+ * |     Tile 1     |     Tile 1     |     Tile 1     |     Tile 1     |
+ * +----------------+----------------+----------------+----------------+
+ * |     Tile 2     |     Tile 2     |     Tile 2     |     Tile 2     |
+ * +----------------+----------------+----------------+----------------+
+ *                                  ...
+ * +----------------+----------------+----------------+----------------+
+ * |     Tile 8     |     Tile 8     |     Tile 8     |     Tile 8     |
+ * +----------------+----------------+----------------+----------------+
+ */
+#define PICOLCDFB_NAME "picolcdfb"
+#define PICOLCDFB_WIDTH (256)
+#define PICOLCDFB_LINE_LENGTH (256/8)
+#define PICOLCDFB_HEIGHT (64)
+#define PICOLCDFB_SIZE (PICOLCDFB_LINE_LENGTH*PICOLCDFB_HEIGHT)
+
+#define PICOLCDFB_UPDATE_RATE_LIMIT   10
+#define PICOLCDFB_UPDATE_RATE_DEFAULT  2
+
+/* Framebuffer visual structures */
+static const struct fb_fix_screeninfo picolcdfb_fix = {
+	.id          = PICOLCDFB_NAME,
+	.type        = FB_TYPE_PACKED_PIXELS,
+	.visual      = FB_VISUAL_MONO01,
+	.xpanstep    = 0,
+	.ypanstep    = 0,
+	.ywrapstep   = 0,
+	.line_length = PICOLCDFB_LINE_LENGTH,
+	.accel       = FB_ACCEL_NONE,
+};
+
+static const struct fb_var_screeninfo picolcdfb_var = {
+	.xres           = PICOLCDFB_WIDTH,
+	.yres           = PICOLCDFB_HEIGHT,
+	.xres_virtual   = PICOLCDFB_WIDTH,
+	.yres_virtual   = PICOLCDFB_HEIGHT,
+	.width          = 103,
+	.height         = 26,
+	.bits_per_pixel = 1,
+};
+
+#ifdef CONFIG_LOGO
+/*
+ * This is a default logo to be loaded upon driver initialization
+ * replacing the default PicoLCD image loaded on device
+ * initialization. This is to provide the user a cue that the
+ * Linux driver is loaded and ready.
+ *
+ * This logo contains the text PicoLCD in the center with one penguin
+ * on each side of the text. The penguins are a 64x64 rendition of
+ * the default framebuffer 80x80 monochrome image scaled down and
+ * cleaned up to retain something that looks a little better than
+ * a simple scaling.
+ *
+ * This logo is a simple xbm image created in GIMP and exported.
+ * To view the image copy the following two #defines plus the
+ * picolcd_bits to an ASCII text file and save with extension
+ * .xbm, then open with GIMP or any other graphical editor
+ * such as eog that recognizes the .xbm format.
+ */
+#define picolcd_width 256
+#define picolcd_height 64
+static const u8 picolcd_bits[PICOLCDFB_SIZE] = {
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xf8, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x1f, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xe7, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe7, 0xe7, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xdf, 0xf9, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdf, 0xf9, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xbf, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xfe, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0x7f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0x7f, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0x7f, 0xcf, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xcf, 0xbf, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0x7f, 0xdf, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xdf, 0xbf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xbf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xdf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xdf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xcf, 0x8f, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xcf, 0x8f, 0xdf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xc7, 0x07, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xc7, 0x07, 0xdf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xd3, 0x67, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xd3, 0x67, 0xdf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xfb, 0x73, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xfb, 0x73, 0xdf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xff, 0xf3, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xf3, 0xbf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xf0, 0x37, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xf0, 0x37, 0xbf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xc5, 0x0f, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xc5, 0x0f, 0xdf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xc0, 0x1b, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xc0, 0x1b, 0xdf, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xc0, 0x27, 0xef, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xc0, 0x27, 0xef, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xe0, 0xc7, 0xef, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe3, 0xff, 0xff, 0xff, 0xfe, 0x3f, 0xfe, 0x00, 0x78, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xe0, 0xc7, 0xef, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xff, 0x1b, 0x67, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe3, 0xff, 0xff, 0xff, 0xfe, 0x3f, 0xfc, 0x00, 0x38, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0x1b, 0x67, 0xff, 0xff,
+	0xff, 0xff, 0xfe, 0xd0, 0xc3, 0xb7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe3, 0xff, 0xff, 0xff, 0xfe, 0x3f, 0xfc, 0x00, 0x38, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xd0, 0xc3, 0xb7, 0xff, 0xff,
+	0xff, 0xff, 0xfd, 0xcf, 0x03, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x3f, 0xfc, 0x7e, 0x38, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xcf, 0x03, 0xfb, 0xff, 0xff,
+	0xff, 0xff, 0xfd, 0xc0, 0x01, 0xfd, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xc0, 0x01, 0xfd, 0xff, 0xff,
+	0xff, 0xff, 0xfb, 0x80, 0x01, 0xfd, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xfb, 0x80, 0x01, 0xfd, 0xff, 0xff,
+	0xff, 0xff, 0xf7, 0x00, 0x00, 0xfe, 0xff, 0xff, 0xff, 0xf1, 0x01, 0xe3, 0xc0, 0x0f, 0x80, 0x1e, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xf7, 0x00, 0x00, 0xfe, 0xff, 0xff,
+	0xff, 0xff, 0xef, 0x00, 0x00, 0xff, 0x7f, 0xff, 0xff, 0xf0, 0x00, 0xe3, 0x80, 0x07, 0x00, 0x0e, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xef, 0x00, 0x00, 0xff, 0x7f, 0xff,
+	0xff, 0xff, 0xef, 0x00, 0x00, 0x7f, 0x7f, 0xff, 0xff, 0xf0, 0x00, 0xe3, 0x80, 0x07, 0x00, 0x0e, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xef, 0x00, 0x00, 0x7f, 0x7f, 0xff,
+	0xff, 0xff, 0xdf, 0x8c, 0x0f, 0x7f, 0xbf, 0xff, 0xff, 0xf1, 0xf8, 0xe3, 0x8f, 0xc7, 0x1f, 0x8e, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xdf, 0x8c, 0x0f, 0x7f, 0xbf, 0xff,
+	0xff, 0xff, 0xde, 0x08, 0x07, 0xbf, 0xdf, 0xff, 0xff, 0xf1, 0xf8, 0xe3, 0x8f, 0xff, 0x1f, 0x8e, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xde, 0x08, 0x07, 0xbf, 0xdf, 0xff,
+	0xff, 0xff, 0xbc, 0x00, 0x01, 0xff, 0xdf, 0xff, 0xff, 0xf1, 0xf8, 0xe3, 0x8f, 0xff, 0x1f, 0x8e, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xbc, 0x00, 0x01, 0xff, 0xdf, 0xff,
+	0xff, 0xff, 0xbc, 0x00, 0x00, 0x7f, 0xdf, 0xff, 0xff, 0xf1, 0xf8, 0xe3, 0x8f, 0xff, 0x1f, 0x8e, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xbc, 0x00, 0x00, 0x7f, 0xdf, 0xff,
+	0xff, 0xff, 0x78, 0x00, 0x00, 0x1f, 0xef, 0xff, 0xff, 0xf1, 0xf8, 0xe3, 0x8f, 0xff, 0x1f, 0x8e, 0x3f, 0xfc, 0x7f, 0xf8, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x78, 0x00, 0x00, 0x1f, 0xef, 0xff,
+	0xff, 0xfe, 0xf8, 0x00, 0x00, 0x1d, 0xe7, 0xff, 0xff, 0xf1, 0xf8, 0xe3, 0x8f, 0xc7, 0x1f, 0x8e, 0x3f, 0x1c, 0x7e, 0x38, 0xfc, 0x7f, 0xff, 0xff, 0xff, 0xfe, 0xf8, 0x00, 0x00, 0x1d, 0xe7, 0xff,
+	0xff, 0xfe, 0xf0, 0x00, 0x00, 0x1d, 0xf7, 0xff, 0xff, 0xf0, 0x00, 0xe3, 0x80, 0x07, 0x00, 0x0e, 0x00, 0x1c, 0x00, 0x38, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xfe, 0xf0, 0x00, 0x00, 0x1d, 0xf7, 0xff,
+	0xff, 0xfd, 0xf0, 0x00, 0x00, 0x1d, 0xf7, 0xff, 0xff, 0xf0, 0x00, 0xe3, 0x80, 0x07, 0x00, 0x0e, 0x00, 0x1c, 0x00, 0x38, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xfd, 0xf0, 0x00, 0x00, 0x1d, 0xf7, 0xff,
+	0xff, 0xfd, 0xf0, 0x00, 0x00, 0x0e, 0xfb, 0xff, 0xff, 0xf1, 0x01, 0xe3, 0xc0, 0x0f, 0x80, 0x1e, 0x00, 0x1e, 0x00, 0x78, 0x00, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xf0, 0x00, 0x00, 0x0e, 0xfb, 0xff,
+	0xff, 0xfd, 0xe0, 0x10, 0x00, 0x0e, 0xfb, 0xff, 0xff, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xe0, 0x10, 0x00, 0x0e, 0xfb, 0xff,
+	0xff, 0xfb, 0xe0, 0x10, 0x00, 0x0e, 0xfb, 0xff, 0xff, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf9, 0x86, 0x7f, 0x3b, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xe0, 0x10, 0x00, 0x0e, 0xfb, 0xff,
+	0xff, 0xfb, 0xe0, 0x10, 0x00, 0x0e, 0xfb, 0xff, 0xff, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf6, 0xbd, 0xfe, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xe0, 0x10, 0x00, 0x0e, 0xfb, 0xff,
+	0xff, 0xfb, 0xe0, 0x10, 0x00, 0x0e, 0xfb, 0xff, 0xff, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x8c, 0x6a, 0x36, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xe0, 0x10, 0x00, 0x0e, 0xfb, 0xff,
+	0xff, 0xfb, 0xe0, 0x10, 0x00, 0x10, 0x3b, 0xff, 0xff, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xf5, 0xb6, 0xd0, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xe0, 0x10, 0x00, 0x10, 0x3b, 0xff,
+	0xff, 0xfa, 0x30, 0x00, 0x00, 0x7f, 0xdb, 0xff, 0xff, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xf5, 0xaa, 0xde, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x30, 0x00, 0x00, 0x7f, 0xdb, 0xff,
+	0xff, 0xfc, 0x38, 0x00, 0x00, 0x4f, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x8e, 0x7f, 0x3e, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x38, 0x00, 0x00, 0x4f, 0xe7, 0xff,
+	0xff, 0xf8, 0x1c, 0x00, 0x00, 0x8f, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x1c, 0x00, 0x00, 0x8f, 0xc7, 0xff,
+	0xff, 0xf0, 0x07, 0x00, 0x00, 0x87, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x07, 0x00, 0x00, 0x87, 0x87, 0xff,
+	0xff, 0xc0, 0x07, 0x80, 0x00, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x07, 0x80, 0x00, 0x80, 0x07, 0xff,
+	0xff, 0x00, 0x03, 0xc0, 0x00, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x03, 0xc0, 0x00, 0x80, 0x07, 0xff,
+	0xff, 0x00, 0x03, 0xc0, 0x00, 0x80, 0x03, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x03, 0xc0, 0x00, 0x80, 0x03, 0xff,
+	0xff, 0x00, 0x01, 0xc0, 0x00, 0x80, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01, 0xc0, 0x00, 0x80, 0x00, 0xff,
+	0xff, 0x00, 0x01, 0xc0, 0x01, 0x80, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01, 0xc0, 0x01, 0x80, 0x00, 0x7f,
+	0xff, 0x00, 0x00, 0x80, 0x03, 0x80, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x80, 0x03, 0x80, 0x00, 0x7f,
+	0xff, 0x00, 0x00, 0x40, 0x07, 0x80, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x40, 0x07, 0x80, 0x00, 0x7f,
+	0xff, 0x00, 0x00, 0x00, 0x3f, 0x80, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x3f, 0x80, 0x01, 0xff,
+	0xff, 0x00, 0x00, 0x3f, 0xff, 0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x3f, 0xff, 0x00, 0x03, 0xff,
+	0xff, 0x00, 0x00, 0x3f, 0xff, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x3f, 0xff, 0x00, 0x0f, 0xff,
+	0xff, 0x80, 0x00, 0x3f, 0xff, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x3f, 0xff, 0x00, 0x1f, 0xff,
+	0xff, 0xfc, 0x00, 0x38, 0x03, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x38, 0x03, 0x00, 0x7f, 0xff,
+	0xff, 0xff, 0xc0, 0x07, 0xfc, 0x80, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x07, 0xfc, 0x80, 0xff, 0xff,
+	0xff, 0xff, 0xe0, 0x7f, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x7f, 0xff, 0x81, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+};
+#endif
+
+
+/* Input device
+ *
+ * The PicoLCD has an IR receiver header, a built-in keypad with 5 keys
+ * and header for 4x4 key matrix. The built-in keys are part of the matrix.
+ */
+#define PICOLCD_KEYS 33
+
+static const int def_keymap[PICOLCD_KEYS] = {
+	KEY_RESERVED, KEY_BACK, KEY_HOMEPAGE, KEY_RESERVED, KEY_RESERVED, KEY_SCROLLUP, KEY_OK, KEY_SCROLLDOWN,
+	KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
+	KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
+	KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
+	KEY_RESERVED
+};
+
+
+
+/* Per device data structure */
+struct picolcd_data {
+	struct hid_device *hdev;
+
+	/* input stuff */
+	struct input_dev *input_keys;
+	struct input_dev *input_cir;
+	int keycode[PICOLCD_KEYS];
+	u8 pressed_keys[2];
+
+	/* Framebuffer stuff */
+	u8 fb_update_rate;
+	u8 *fb_vbitmap;		/* local copy of what was sent to PicoLCD */
+	u8 *fb_bitmap;		/* framebuffer */
+	struct fb_info *fb_info;
+	struct fb_deferred_io fb_defio;
+	struct lcd_device *lcd;
+	struct backlight_device *backlight;
+	int lcd_contrast;
+	int lcd_power;
+	int lcd_brightness;
+
+	/* GPIO stuff */
+
+	/* Housekeeping stuff */
+	spinlock_t lock;
+	struct completion ready;
+	int status;
+#define PICOLCD_READY_ALIVE 1
+#define PICOLCD_READY_FB 2
+#define PICOLCD_READY_ALL (PICOLCD_READY_ALIVE | PICOLCD_READY_FB)
+};
+
+
+
+/* Find a given output report */
+static struct hid_report *picolcd_out_report(int id, struct hid_device *hdev)
+{
+	struct list_head *feature_report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
+	struct hid_report *report = NULL;
+
+	list_for_each_entry(report, feature_report_list, list) {
+		if (report->id == id)
+			return report;
+	}
+	dev_err(&hdev->dev, "No report with id 0x%x found\n", id);
+	return NULL;
+}
+
+
+
+/* Send a given tile to PicoLCD */
+static inline int picolcd_fb_send_tile(struct hid_device *hdev, int chip,
+		int tile)
+{
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+	struct hid_report *report1 = picolcd_out_report(REPORT_LCD_CMD_DATA, hdev);
+	struct hid_report *report2 = picolcd_out_report(REPORT_LCD_DATA, hdev);
+	u8 *tdata;
+	int i;
+
+	if (!report1 || report1->maxfield != 1 || !report2 || report2->maxfield != 1)
+		return -ENODEV;
+
+	hid_set_field(report1->field[0],  0, chip << 2);
+	hid_set_field(report1->field[0],  1, 0x02);
+	hid_set_field(report1->field[0],  2, 0x00);
+	hid_set_field(report1->field[0],  3, 0x00);
+	hid_set_field(report1->field[0],  4, 0xb8 | tile);
+	hid_set_field(report1->field[0],  5, 0x00);
+	hid_set_field(report1->field[0],  6, 0x00);
+	hid_set_field(report1->field[0],  7, 0x40);
+	hid_set_field(report1->field[0],  8, 0x00);
+	hid_set_field(report1->field[0],  9, 0x00);
+	hid_set_field(report1->field[0], 10,   32);
+
+	hid_set_field(report2->field[0],  0, (chip << 2) | 0x01);
+	hid_set_field(report2->field[0],  1, 0x00);
+	hid_set_field(report2->field[0],  2, 0x00);
+	hid_set_field(report2->field[0],  3,   32);
+
+	tdata = data->fb_vbitmap + (tile * 4 + chip) * 64;
+	for (i = 0; i < 64; i++)
+		if (i < 32)
+			hid_set_field(report1->field[0], 11 + i, tdata[i]);
+		else
+			hid_set_field(report2->field[0], 4 + i - 32, tdata[i]);
+
+	usbhid_submit_report(data->hdev, report1, USB_DIR_OUT);
+	usbhid_submit_report(data->hdev, report2, USB_DIR_OUT);
+	return 0;
+}
+
+/* Translate a single tile*/
+static inline int picolcd_fb_update_tile(u8 *vbitmap, const u8 *bitmap,
+		int chip, int tile)
+{
+	int i, b, changed = 0;
+	u8 tdata[64];
+	u8 *vdata = vbitmap + (tile * 4 + chip) * 64;
+
+	for (b = 7; b >= 0; b--) {
+		const u8 *bdata = bitmap + tile * 256 + chip * 8 + b * 32;
+		for (i = 0; i < 64; i++) {
+			tdata[i] <<= 1;
+			tdata[i] |= (bdata[i/8] >> (7 - i % 8)) & 0x01;
+		}
+	}
+	for (i = 0; i < 64; i++)
+		if (tdata[i] != vdata[i]) {
+			changed = 1;
+			vdata[i] = tdata[i];
+		}
+	return changed;
+}
+
+/* Reconfigure LCD display
+ *   TODO: prevent concurrent runs */
+static int picolcd_fb_reset(struct hid_device *hdev, int clear)
+{
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+	struct hid_report *report = picolcd_out_report(REPORT_LCD_CMD, hdev);
+	int chip, tile, i, j;
+	static const u8 mapcmd[8] = { 0x00, 0x02, 0x00, 0x64, 0x3f, 0x00, 0x64, 0xc0 };
+
+	if (!report || report->maxfield != 1)
+		return -ENODEV;
+
+	for (i = 0; i < 4; i++) {
+		for (j = 0; j < report->field[0]->maxusage; j++)
+			if (j == 0)
+				hid_set_field(report->field[0], j, i << 2);
+			else if (j < sizeof(mapcmd))
+				hid_set_field(report->field[0], j, mapcmd[j]);
+			else
+				hid_set_field(report->field[0], j, 0);
+		usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
+	}
+
+	if (!clear) {
+		spin_lock(&data->lock);
+		data->status |= PICOLCD_READY_FB;
+		spin_unlock(&data->lock);
+		for (chip = 0; chip < 4; chip++)
+			for (tile = 0; tile < 8; tile++) {
+				i = picolcd_fb_send_tile(data->hdev, chip, tile);
+				if (i != 0)
+					return i;
+			}
+		return 0;
+	}
+
+#ifdef CONFIG_LOGO
+	memcpy(data->fb_bitmap, picolcd_bits, PICOLCDFB_SIZE);
+#else
+	memset(data->fb_bitmap, 0, PICOLCDFB_SIZE);
+#endif
+	for (chip = 0; chip < 4; chip++)
+		for (tile = 0; tile < 8; tile++) {
+			picolcd_fb_update_tile(data->fb_vbitmap,
+					data->fb_bitmap, chip, tile);
+			i = picolcd_fb_send_tile(data->hdev, chip, tile);
+			if (i != 0)
+				return i;
+		}
+
+	spin_lock(&data->lock);
+	data->status |= PICOLCD_READY_FB;
+	spin_unlock(&data->lock);
+	return 0;
+}
+
+/* Update fb_vbitmap from the screen_base and send changed tiles to device */
+static void picolcd_fb_update(struct picolcd_data *data)
+{
+	int chip, tile;
+
+	spin_lock(&data->lock);
+	if (!(data->status & PICOLCD_READY_FB)) {
+		spin_unlock(&data->lock);
+		picolcd_fb_reset(data->hdev, 0);
+	} else
+		spin_unlock(&data->lock);
+
+	/*
+	 * Translate the XBM format screen_base into the format needed by the
+	 * PicoLCD. See display layout above.
+	 * Do this one tile after the other and push those tiles that changed.
+	 */
+	for (chip = 0; chip < 4; chip++)
+		for (tile = 0; tile < 8; tile++)
+			if (picolcd_fb_update_tile(data->fb_vbitmap,
+					data->fb_bitmap, chip, tile))
+				picolcd_fb_send_tile(data->hdev, chip, tile);
+}
+
+/* Stub to call the system default and update the image on the picoLCD */
+static void picolcd_fb_fillrect(struct fb_info *info,
+		const struct fb_fillrect *rect)
+{
+	if (!info->par)
+		return;
+	sys_fillrect(info, rect);
+
+	picolcd_fb_update(info->par);
+}
+
+/* Stub to call the system default and update the image on the picoLCD */
+static void picolcd_fb_copyarea(struct fb_info *info,
+		const struct fb_copyarea *area)
+{
+	if (!info->par)
+		return;
+	sys_copyarea(info, area);
+
+	picolcd_fb_update(info->par);
+}
+
+/* Stub to call the system default and update the image on the picoLCD */
+static void picolcd_fb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	if (!info->par)
+		return;
+	sys_imageblit(info, image);
+
+	picolcd_fb_update(info->par);
+}
+
+/*
+ * this is the slow path from userspace. they can seek and write to
+ * the fb. it's inefficient to do anything less than a full screen draw
+ */
+static ssize_t picolcd_fb_write(struct fb_info *info, const char __user *buf,
+		size_t count, loff_t *ppos)
+{
+	ssize_t ret;
+	if (!info->par)
+		return -ENODEV;
+	ret = fb_sys_write(info, buf, count, ppos);
+	if (ret >= 0)
+		picolcd_fb_update(info->par);
+	return ret;
+}
+
+static int picolcd_fb_blank(int blank, struct fb_info *info)
+{
+	if (!info->par)
+		return -ENODEV;
+	/* We let fb notification do this for us via lcd/backlight device */
+	return 0;
+}
+
+static void picolcd_fb_destroy(struct fb_info *info)
+{
+	fb_deferred_io_cleanup(info);
+	if (info->par)
+		((struct picolcd_data *)info->par)->fb_info = NULL;
+	framebuffer_release(info);
+}
+
+/* Note this can't be const because of struct fb_info definition */
+static struct fb_ops picolcdfb_ops = {
+	.owner        = THIS_MODULE,
+	.fb_destroy   = picolcd_fb_destroy,
+	.fb_read      = fb_sys_read,
+	.fb_write     = picolcd_fb_write,
+	.fb_blank     = picolcd_fb_blank,
+	.fb_fillrect  = picolcd_fb_fillrect,
+	.fb_copyarea  = picolcd_fb_copyarea,
+	.fb_imageblit = picolcd_fb_imageblit,
+};
+
+
+/* Callback from deferred IO workqueue */
+static void picolcd_fb_deferred_io(struct fb_info *info, struct list_head *pagelist)
+{
+	picolcd_fb_update(info->par);
+}
+
+static const struct fb_deferred_io picolcd_fb_defio = {
+	.delay = HZ / PICOLCDFB_UPDATE_RATE_DEFAULT,
+	.deferred_io = picolcd_fb_deferred_io,
+};
+
+
+/*
+ * The "fb_update_rate" attribute
+ */
+static ssize_t picolcd_fb_update_rate_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct picolcd_data *data = dev_get_drvdata(dev);
+	unsigned fb_update_rate = data->fb_update_rate;
+
+	return snprintf(buf, PAGE_SIZE, "%u (1..%u)\n", fb_update_rate,
+			PICOLCDFB_UPDATE_RATE_LIMIT);
+}
+
+static ssize_t picolcd_fb_update_rate_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct picolcd_data *data = dev_get_drvdata(dev);
+	int i;
+	unsigned u;
+
+	if (count < 1 || count > 10)
+		return -EINVAL;
+
+	i = sscanf(buf, "%u", &u);
+	if (i != 1)
+		return -EINVAL;
+
+	if (u > PICOLCDFB_UPDATE_RATE_LIMIT)
+		return -ERANGE;
+	else if (u == 0)
+		u = PICOLCDFB_UPDATE_RATE_DEFAULT;
+
+	data->fb_update_rate = u;
+	data->fb_defio.delay = HZ / data->fb_update_rate;
+	return count;
+}
+
+static DEVICE_ATTR(fb_update_rate, 0666, picolcd_fb_update_rate_show,
+		picolcd_fb_update_rate_store);
+
+
+/*
+ * backlight class device
+ */
+static int picolcd_get_brightness(struct backlight_device *bdev)
+{
+	struct picolcd_data *data = bl_get_data(bdev);
+	return data->lcd_brightness;
+}
+
+static int picolcd_set_brightness(struct backlight_device *bdev)
+{
+	struct picolcd_data *data = bl_get_data(bdev);
+	struct hid_report *report = picolcd_out_report(REPORT_BRIGHTNESS, data->hdev);
+
+	if (!report || report->maxfield != 1 || report->field[0]->maxusage != 1)
+		return -ENODEV;
+
+	data->lcd_brightness = bdev->props.brightness & 0x0ff;
+	data->lcd_power      = bdev->props.power;
+	hid_set_field(report->field[0], 0, data->lcd_power == FB_BLANK_UNBLANK ? data->lcd_brightness : 0);
+	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
+	return 0;
+}
+
+static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb)
+{
+	struct picolcd_data *data = bl_get_data(bdev);
+	return fb == data->fb_info;
+}
+
+static const struct backlight_ops picolcd_blops = {
+	.update_status  = picolcd_set_brightness,
+	.get_brightness = picolcd_get_brightness,
+	.check_fb       = picolcd_check_bl_fb,
+};
+
+/*
+ * lcd class device
+ */
+static int picolcd_get_power(struct lcd_device *ldev)
+{
+	struct picolcd_data *data = lcd_get_data(ldev);
+	return data->lcd_power;
+}
+
+static int picolcd_set_power(struct lcd_device *ldev, int power)
+{
+	struct picolcd_data *data = lcd_get_data(ldev);
+	data->backlight->props.power = power;
+	return picolcd_set_brightness(data->backlight);
+}
+
+static int picolcd_get_contrast(struct lcd_device *ldev)
+{
+	struct picolcd_data *data = lcd_get_data(ldev);
+	return data->lcd_contrast;
+}
+
+static int picolcd_set_contrast(struct lcd_device *ldev, int contrast)
+{
+	struct picolcd_data *data = lcd_get_data(ldev);
+	struct hid_report *report = picolcd_out_report(REPORT_CONTRAST, data->hdev);
+
+	if (!report || report->maxfield != 1 || report->field[0]->maxusage != 1)
+		return -ENODEV;
+
+	data->lcd_contrast = contrast & 0x0ff;
+	hid_set_field(report->field[0], 0, data->lcd_contrast);
+	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
+	return 0;
+}
+
+static int picolcd_check_lcd_fb(struct lcd_device *ldev, struct fb_info *fb)
+{
+	struct picolcd_data *data = lcd_get_data(ldev);
+	return fb == data->fb_info;
+}
+
+static struct lcd_ops picolcd_lcdops = {
+	.get_power      = picolcd_get_power,
+	.set_power      = picolcd_set_power,
+	.get_contrast   = picolcd_get_contrast,
+	.set_contrast   = picolcd_set_contrast,
+	.check_fb       = picolcd_check_lcd_fb,
+};
+
+
+/*
+ * input class device
+ */
+static int picolcd_raw_keypad(struct hid_device *hdev,
+		struct hid_report *report, u8 *raw_data, int size)
+{
+	/*
+	 * Keypad event
+	 * First and second data bytes list currently pressed keys,
+	 * 0x00 means no key and at most 2 keys may be pressed at same time
+	 */
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+	int i, j;
+
+	/* determine newly pressed keys */
+	for (i = 0; i < size; i++) {
+		int key_code;
+		if (raw_data[i] == 0)
+			continue;
+		for (j = 0; j < sizeof(data->pressed_keys); j++)
+			if (data->pressed_keys[j] == raw_data[i])
+				goto key_already_down;
+		for (j = 0; j < sizeof(data->pressed_keys); j++)
+			if (data->pressed_keys[j] == 0) {
+				data->pressed_keys[j] = raw_data[i];
+				break;
+			}
+		input_event(data->input_keys, EV_MSC, MSC_SCAN, raw_data[i]);
+		if (input_get_keycode(data->input_keys, raw_data[i], &key_code))
+			key_code = KEY_UNKNOWN;
+		if (key_code != KEY_UNKNOWN) {
+			dbg_hid(PICOLCD_NAME " got key press for %u:%d", raw_data[i], key_code);
+			input_report_key(data->input_keys, key_code, 1);
+		}
+		input_sync(data->input_keys);
+key_already_down:
+		continue;
+	}
+
+	/* determine newly released keys */
+	for (j = 0; j < sizeof(data->pressed_keys); j++) {
+		int key_code;
+		if (data->pressed_keys[j] == 0)
+			continue;
+		for (i = 0; i < size; i++)
+			if (data->pressed_keys[j] == raw_data[i])
+				goto key_still_down;
+		input_event(data->input_keys, EV_MSC, MSC_SCAN, data->pressed_keys[j]);
+		if (input_get_keycode(data->input_keys, data->pressed_keys[j], &key_code))
+			key_code = KEY_UNKNOWN;
+		if (key_code != KEY_UNKNOWN) {
+			dbg_hid(PICOLCD_NAME " got key release for %u:%d", data->pressed_keys[j], key_code);
+			input_report_key(data->input_keys, key_code, 0);
+		}
+		input_sync(data->input_keys);
+		data->pressed_keys[j] = 0;
+key_still_down:
+		continue;
+	}
+	return 1;
+}
+
+
+
+
+
+/*
+ * Reset our device and wait for answer to VERSION request
+ */
+static int picolcd_reset(struct hid_device *hdev)
+{
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+	struct hid_report *report1 = picolcd_out_report(REPORT_RESET, hdev);
+	struct hid_report *report2 = picolcd_out_report(REPORT_VERSION, hdev);
+	int ret;
+
+	if (!report1 || report1->maxfield != 1 || !report2)
+		return -ENODEV;
+
+	spin_lock(&data->lock);
+	data->status = 0;
+	spin_unlock(&data->lock);
+	INIT_COMPLETION(data->ready);
+
+	hid_set_field(report1->field[0], 0, 1);
+	usbhid_submit_report(hdev, report1, USB_DIR_OUT);
+
+	usbhid_submit_report(hdev, report2, USB_DIR_OUT);
+	wait_for_completion_interruptible_timeout(&data->ready, HZ*2);
+
+	spin_lock(&data->lock);
+	if (data->status == 0) {
+		spin_unlock(&data->lock);
+		return -EBUSY;
+	} else
+		spin_unlock(&data->lock);
+
+	ret = picolcd_set_contrast(data->lcd, data->lcd_contrast);
+	if (ret)
+		return ret;
+	ret = picolcd_set_brightness(data->backlight);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+/*
+ * The "reset" attribute
+ */
+static ssize_t picolcd_reset_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "all fb");
+}
+
+static ssize_t picolcd_reset_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct picolcd_data *data = dev_get_drvdata(dev);
+	size_t cnt = count;
+	while (cnt > 0 && (buf[cnt-1] == ' ' || buf[cnt-1] == '\n'))
+		cnt--;
+	if (strncmp(buf, "all", cnt) == 0) {
+		picolcd_reset(data->hdev);
+		picolcd_fb_reset(data->hdev, 1);
+	} else if (strncmp(buf, "fb", cnt) == 0) {
+		picolcd_fb_reset(data->hdev, 1);
+	} else
+		return -EINVAL;
+	return count;
+}
+
+static DEVICE_ATTR(reset, 0600, picolcd_reset_show,
+		picolcd_reset_store);
+
+
+
+/*
+ * Handle raw report as sent by device
+ */
+static int picolcd_raw_event(struct hid_device *hdev,
+		struct hid_report *report, u8 *raw_data, int size)
+{
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+	char hexdata[25];
+	int i;
+
+	if (data == NULL)
+		return 1;
+
+	for (i = 0; i < sizeof(hexdata) / 2; i++)
+		sprintf(hexdata+2*i, "%02hhx", raw_data[i]);
+	if (size >= sizeof(hexdata)/2) {
+		hexdata[sizeof(hexdata)-4] = '.';
+		hexdata[sizeof(hexdata)-3] = '.';
+		hexdata[sizeof(hexdata)-2] = '.';
+		hexdata[sizeof(hexdata)-1] = '\0';
+	} else
+		hexdata[size*2] = '\0';
+
+	switch (report->id) {
+	case REPORT_KEYPAD:
+		if (size == 3 && raw_data[0] == 0x11 && data->input_keys) {
+			return picolcd_raw_keypad(hdev, report, raw_data+1, size-1);
+		} else {
+			dbg_hid(PICOLCD_NAME " unsupported key event (%d bytes): 0x%s\n", size, hexdata);
+			break;
+		}
+		break;
+	case REPORT_VERSION:
+		if (size == 3)
+			dev_info(&hdev->dev, "Firmware version is %hd.%hd\n", raw_data[1], raw_data[2]);
+
+		spin_lock(&data->lock);
+		if (!(data->status & PICOLCD_READY_ALIVE)) {
+			data->status |= PICOLCD_READY_ALIVE;
+			spin_unlock(&data->lock);
+			complete_all(&data->ready);
+		} else
+			spin_unlock(&data->lock);
+		break;
+
+	default:
+		dbg_hid(PICOLCD_NAME " got raw event %d with length %d: %s\n", report->id, size, hexdata);
+		return 0;
+	}
+
+	return 1;
+}
+
+
+/*
+ * Create a group of attributes so that we can create and destroy them all
+ * at once.
+ */
+static struct attribute *picolcd_attrs[] = {
+	&dev_attr_fb_update_rate.attr,
+	&dev_attr_reset.attr,
+	NULL,	 /* need to NULL terminate the list of attributes */
+};
+
+/*
+ * An unnamed attribute group will put all of the attributes directly in
+ * the kobject directory.  If we specify a name, a subdirectory will be
+ * created for the attributes with the directory being the name of the
+ * attribute group.
+ */
+static const struct attribute_group picolcd_attr_group = {
+	.attrs = picolcd_attrs,
+};
+
+
+static int picolcd_probe(struct hid_device *hdev,
+		     const struct hid_device_id *id)
+{
+	struct picolcd_data *data;
+	struct input_dev *idev;
+	int i, error = -ENOMEM;
+	char name[12];
+
+	dbg_hid(PICOLCD_NAME " hardware probe...\n");
+
+	/*
+	 * Let's allocate the picolcd data structure, set some reasonable
+	 * defaults, and associate it with the device
+	 */
+	data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL);
+	if (data == NULL) {
+		dev_err(&hdev->dev, "can't allocate space for Minibox PicoLCD device data\n");
+		error = -ENOMEM;
+		goto err_no_cleanup;
+	}
+
+	spin_lock_init(&data->lock);
+	init_completion(&data->ready);
+	data->hdev = hdev;
+	hid_set_drvdata(hdev, data);
+
+	data->fb_bitmap = vmalloc(PICOLCDFB_SIZE);
+	if (data->fb_bitmap == NULL) {
+		dev_err(&hdev->dev, "can't get a free page for framebuffer\n");
+		error = -ENOMEM;
+		goto err_cleanup_data;
+	}
+
+	data->fb_vbitmap = kmalloc(PICOLCDFB_SIZE, GFP_KERNEL);
+	if (data->fb_vbitmap == NULL) {
+		dev_err(&hdev->dev, "can't alloc vbitmap image buffer\n");
+		error = -ENOMEM;
+		goto err_cleanup_fb_bitmap;
+	}
+
+	/* Parse the device reports and start it up */
+	error = hid_parse(hdev);
+	if (error) {
+		dev_err(&hdev->dev, "device report parse failed\n");
+		goto err_cleanup_fb_vbitmap;
+	}
+
+	error = hid_hw_start(hdev, HID_CONNECT_HIDINPUT);
+	if (error) {
+		dev_err(&hdev->dev, "hardware start failed\n");
+		goto err_cleanup_fb_vbitmap;
+	}
+	dbg_hid(PICOLCD_NAME " claimed: %d\n", hdev->claimed);
+
+	error = hdev->ll_driver->open(hdev);
+	if (error) {
+		dev_err(&hdev->dev, "failed to open input interrupt pipe for key and IR events\n");
+		goto err_cleanup_hid_hw;
+	}
+
+	/* Setup input device */
+	idev = input_allocate_device();
+	if (idev == NULL) {
+		dev_err(&hdev->dev, "failed to allocate input device");
+		error = -ENOMEM;
+		goto err_cleanup_hid_ll;
+	}
+	input_set_drvdata(idev, hdev);
+	memcpy(data->keycode, def_keymap, sizeof(def_keymap));
+	idev->name = hdev->name;
+	idev->phys = hdev->phys;
+	idev->uniq = hdev->uniq;
+	idev->id.bustype = hdev->bus;
+	idev->id.vendor  = hdev->vendor;
+	idev->id.product = hdev->product;
+	idev->id.version = hdev->version;
+	idev->dev.parent = hdev->dev.parent;
+	idev->keycode     = &data->keycode;
+	idev->keycodemax  = PICOLCD_KEYS;
+	idev->keycodesize = sizeof(int);
+	input_set_capability(idev, EV_MSC, MSC_SCAN);
+	set_bit(EV_REP, idev->evbit);
+	for (i = 0; i < PICOLCD_KEYS; i++) {
+		int key = ((int *)idev->keycode)[i];
+		if (key < KEY_MAX && key >= 0)
+			input_set_capability(idev, EV_KEY, key);
+	}
+	error = input_register_device(idev);
+	if (error) {
+		dev_err(&hdev->dev, "error registering the input device");
+		input_free_device(idev);
+		goto err_cleanup_hid_ll;
+	}
+	data->input_keys = idev;
+
+	/* Set up the framebuffer device */
+	data->fb_update_rate = PICOLCDFB_UPDATE_RATE_DEFAULT;
+	data->fb_defio = picolcd_fb_defio;
+	data->fb_info = framebuffer_alloc(0, &hdev->dev);
+	if (data->fb_info == NULL) {
+		dev_err(&hdev->dev, "failed to allocate a framebuffer\n");
+		error = -ENOMEM;
+		goto err_cleanup_input_keys;
+	}
+
+	data->fb_info->fbdefio = &data->fb_defio;
+	data->fb_info->screen_base = (char __force __iomem *) data->fb_bitmap;
+	data->fb_info->fbops = &picolcdfb_ops;
+	data->fb_info->var = picolcdfb_var;
+	data->fb_info->fix = picolcdfb_fix;
+	data->fb_info->fix.smem_len = PICOLCDFB_SIZE;
+	data->fb_info->par = data;
+	data->fb_info->flags = FBINFO_FLAG_DEFAULT;
+	fb_deferred_io_init(data->fb_info);
+
+	error = register_framebuffer(data->fb_info);
+	if (error < 0) {
+		dev_err(&hdev->dev, "failed to register framebuffer\n");
+		fb_deferred_io_cleanup(data->fb_info);
+		framebuffer_release(data->fb_info);
+		goto err_cleanup_input_keys;
+	} else
+		error = 0;
+
+	snprintf(name, sizeof(name), "fb%d", data->fb_info->node);
+	data->lcd = lcd_device_register(name, &hdev->dev, data, &picolcd_lcdops);
+	if (IS_ERR(data->lcd)) {
+		dev_err(&hdev->dev, "failed to register LCD\n");
+		error = PTR_ERR(data->lcd);
+		goto err_cleanup_fb;
+	}
+	data->lcd->props.max_contrast = 0x0ff;
+	data->lcd_contrast = 0xe5;
+
+	data->backlight = backlight_device_register(name, &hdev->dev, data, &picolcd_blops);
+	if (IS_ERR(data->backlight)) {
+		dev_err(&hdev->dev, "failed to register backlight\n");
+		error = PTR_ERR(data->backlight);
+		goto err_cleanup_lcd;
+	}
+	data->backlight->props.max_brightness = 0x0ff;
+	data->backlight->props.brightness     = 0xff;
+	data->lcd_brightness                  = 0xff;
+
+	dbg_hid(PICOLCD_NAME " waiting for device to activate\n");
+	if (!picolcd_reset(hdev)) {
+		dbg_hid(PICOLCD_NAME " initialized\n");
+	} else
+		dev_warn(&hdev->dev, "hasn't responded yet, forging ahead with initialization\n");
+
+	picolcd_fb_reset(hdev, 1);
+
+	/* Add the sysfs attributes */
+	error = sysfs_create_group(&(hdev->dev.kobj), &picolcd_attr_group);
+	if (error) {
+		dev_err(&hdev->dev, "failed to create sysfs group attributes\n");
+		goto err_cleanup_bl;
+	}
+
+	dbg_hid(PICOLCD_NAME " activated and initialized\n");
+	return 0;
+
+
+err_cleanup_bl:
+	backlight_device_unregister(data->backlight);
+err_cleanup_lcd:
+	lcd_device_unregister(data->lcd);
+err_cleanup_fb:
+	unregister_framebuffer(data->fb_info);
+err_cleanup_input_keys:
+	input_unregister_device(data->input_keys);
+err_cleanup_hid_ll:
+	hdev->ll_driver->close(hdev);
+err_cleanup_hid_hw:
+	hid_hw_stop(hdev);
+err_cleanup_fb_vbitmap:
+	kfree(data->fb_vbitmap);
+err_cleanup_fb_bitmap:
+	vfree(data->fb_bitmap);
+err_cleanup_data:
+	kfree(data);
+err_no_cleanup:
+	hid_set_drvdata(hdev, NULL);
+
+	return error;
+}
+
+static void picolcd_remove(struct hid_device *hdev)
+{
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+
+	dbg_hid(PICOLCD_NAME " hardware remove...\n");
+	sysfs_remove_group(&(hdev->dev.kobj), &picolcd_attr_group);
+
+	hdev->ll_driver->close(hdev);
+	hid_hw_stop(hdev);
+
+	/* Clean up the framebuffer */
+	backlight_device_unregister(data->backlight);
+	lcd_device_unregister(data->lcd);
+	unregister_framebuffer(data->fb_info);
+
+	/* Get the internal picolcd data buffer */
+	input_unregister_device(data->input_keys);
+
+	vfree(data->fb_bitmap);
+	kfree(data->fb_vbitmap);
+
+	/* Finally, clean up the picolcd data itself */
+	kfree(data);
+}
+
+static const struct hid_device_id picolcd_devices[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, picolcd_devices);
+
+static struct hid_driver picolcd_driver = {
+	.name =          "hid-picolcd",
+	.id_table =      picolcd_devices,
+	.probe =         picolcd_probe,
+	.remove =        picolcd_remove,
+	.raw_event =     picolcd_raw_event,
+};
+
+static int __init picolcd_init(void)
+{
+	return hid_register_driver(&picolcd_driver);
+}
+
+static void __exit picolcd_exit(void)
+{
+	hid_unregister_driver(&picolcd_driver);
+}
+
+module_init(picolcd_init);
+module_exit(picolcd_exit);
+MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver");
+MODULE_LICENSE("GPL");