HID: picoLCD: split driver code

In order to make code maintenance easier, split the vairous
functions into individial files (this removes a bunch of #ifdefs).

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

11 files changed, 3069 insertions, 2748 deletions

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index fbf49503508..a451cdb0841 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -527,6 +527,14 @@ config HID_PICOLCD_LEDS
 	---help---
 	  Provide access to PicoLCD's GPO pins via leds class.
 
+config HID_PICOLCD_CIR
+	bool "CIR via RC class" if EXPERT
+	default !EXPERT
+	depends on HID_PICOLCD
+	depends on HID_PICOLCD=RC_CORE || RC_CORE=y
+	---help---
+	  Provide access to PicoLCD's CIR interface via remote control (LIRC).
+
 config HID_PRIMAX
 	tristate "Primax non-fully HID-compliant devices"
 	depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index f975485f88b..3684750c976 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -69,6 +69,26 @@ obj-$(CONFIG_HID_PRODIKEYS)	+= hid-prodikeys.o
 obj-$(CONFIG_HID_PANTHERLORD)	+= hid-pl.o
 obj-$(CONFIG_HID_PETALYNX)	+= hid-petalynx.o
 obj-$(CONFIG_HID_PICOLCD)	+= hid-picolcd.o
+hid-picolcd-y			+= hid-picolcd_core.o
+ifdef CONFIG_HID_PICOLCD_FB
+hid-picolcd-y			+= hid-picolcd_fb.o
+endif
+ifdef CONFIG_HID_PICOLCD_BACKLIGHT
+hid-picolcd-y			+= hid-picolcd_backlight.o
+endif
+ifdef CONFIG_HID_PICOLCD_LCD
+hid-picolcd-y			+= hid-picolcd_lcd.o
+endif
+ifdef CONFIG_HID_PICOLCD_LEDS
+hid-picolcd-y			+= hid-picolcd_leds.o
+endif
+ifdef CONFIG_HID_PICOLCD_CIR
+hid-picolcd-y			+= hid-picolcd_cir.o
+endif
+ifdef CONFIG_DEBUG_FS
+hid-picolcd-y			+= hid-picolcd_debugfs.o
+endif
+
 obj-$(CONFIG_HID_PRIMAX)	+= hid-primax.o
 obj-$(CONFIG_HID_ROCCAT)	+= hid-roccat.o hid-roccat-common.o \
 	hid-roccat-arvo.o hid-roccat-isku.o hid-roccat-kone.o \
diff --git a/drivers/hid/hid-picolcd.c b/drivers/hid/hid-picolcd.c
deleted file mode 100644
index 27c8ebdfad0..00000000000
--- a/drivers/hid/hid-picolcd.c
+++ /dev/null
@@ -1,2748 +0,0 @@
-/***************************************************************************
- *   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, 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/hid-debug.h>
-#include <linux/input.h>
-#include "hid-ids.h"
-#include "usbhid/usbhid.h"
-#include <linux/usb.h>
-
-#include <linux/fb.h>
-#include <linux/vmalloc.h>
-#include <linux/backlight.h>
-#include <linux/lcd.h>
-
-#include <linux/leds.h>
-
-#include <linux/seq_file.h>
-#include <linux/debugfs.h>
-
-#include <linux/completion.h>
-#include <linux/uaccess.h>
-#include <linux/module.h>
-
-#define PICOLCD_NAME "PicoLCD (graphic)"
-
-/* Report numbers */
-#define REPORT_ERROR_CODE      0x10 /* LCD: IN[16]  */
-#define   ERR_SUCCESS            0x00
-#define   ERR_PARAMETER_MISSING  0x01
-#define   ERR_DATA_MISSING       0x02
-#define   ERR_BLOCK_READ_ONLY    0x03
-#define   ERR_BLOCK_NOT_ERASABLE 0x04
-#define   ERR_BLOCK_TOO_BIG      0x05
-#define   ERR_SECTION_OVERFLOW   0x06
-#define   ERR_INVALID_CMD_LEN    0x07
-#define   ERR_INVALID_DATA_LEN   0x08
-#define REPORT_KEY_STATE       0x11 /* LCD: IN[2]   */
-#define REPORT_IR_DATA         0x21 /* LCD: IN[63]  */
-#define REPORT_EE_DATA         0x32 /* LCD: IN[63]  */
-#define REPORT_MEMORY          0x41 /* LCD: IN[63]  */
-#define REPORT_LED_STATE       0x81 /* LCD: OUT[1]  */
-#define REPORT_BRIGHTNESS      0x91 /* LCD: OUT[1]  */
-#define REPORT_CONTRAST        0x92 /* LCD: OUT[1]  */
-#define REPORT_RESET           0x93 /* LCD: OUT[2]  */
-#define REPORT_LCD_CMD         0x94 /* LCD: OUT[63] */
-#define REPORT_LCD_DATA        0x95 /* LCD: OUT[63] */
-#define REPORT_LCD_CMD_DATA    0x96 /* LCD: OUT[63] */
-#define	REPORT_EE_READ         0xa3 /* LCD: OUT[63] */
-#define REPORT_EE_WRITE        0xa4 /* LCD: OUT[63] */
-#define REPORT_ERASE_MEMORY    0xb2 /* LCD: OUT[2]  */
-#define REPORT_READ_MEMORY     0xb3 /* LCD: OUT[3]  */
-#define REPORT_WRITE_MEMORY    0xb4 /* LCD: OUT[63] */
-#define REPORT_SPLASH_RESTART  0xc1 /* LCD: OUT[1]  */
-#define REPORT_EXIT_KEYBOARD   0xef /* LCD: OUT[2]  */
-#define REPORT_VERSION         0xf1 /* LCD: IN[2],OUT[1]    Bootloader: IN[2],OUT[1]   */
-#define REPORT_BL_ERASE_MEMORY 0xf2 /*                      Bootloader: IN[36],OUT[4]  */
-#define REPORT_BL_READ_MEMORY  0xf3 /*                      Bootloader: IN[36],OUT[4]  */
-#define REPORT_BL_WRITE_MEMORY 0xf4 /*                      Bootloader: IN[36],OUT[36] */
-#define REPORT_DEVID           0xf5 /* LCD: IN[5], OUT[1]   Bootloader: IN[5],OUT[1]   */
-#define REPORT_SPLASH_SIZE     0xf6 /* LCD: IN[4], OUT[1]   */
-#define REPORT_HOOK_VERSION    0xf7 /* LCD: IN[2], OUT[1]   */
-#define REPORT_EXIT_FLASHER    0xff /*                      Bootloader: OUT[2]         */
-
-#ifdef CONFIG_HID_PICOLCD_FB
-/* 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_HEIGHT (64)
-#define PICOLCDFB_SIZE (PICOLCDFB_WIDTH * PICOLCDFB_HEIGHT / 8)
-
-#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_WIDTH / 8,
-	.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,
-	.grayscale      = 1,
-	.red            = {
-		.offset = 0,
-		.length = 1,
-		.msb_right = 0,
-	},
-	.green          = {
-		.offset = 0,
-		.length = 1,
-		.msb_right = 0,
-	},
-	.blue           = {
-		.offset = 0,
-		.length = 1,
-		.msb_right = 0,
-	},
-	.transp         = {
-		.offset = 0,
-		.length = 0,
-		.msb_right = 0,
-	},
-};
-#endif /* CONFIG_HID_PICOLCD_FB */
-
-/* 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.
- */
-static const unsigned short def_keymap[] = {
-	KEY_RESERVED,	/* none */
-	KEY_BACK,	/* col 4 + row 1 */
-	KEY_HOMEPAGE,	/* col 3 + row 1 */
-	KEY_RESERVED,	/* col 2 + row 1 */
-	KEY_RESERVED,	/* col 1 + row 1 */
-	KEY_SCROLLUP,	/* col 4 + row 2 */
-	KEY_OK,		/* col 3 + row 2 */
-	KEY_SCROLLDOWN,	/* col 2 + row 2 */
-	KEY_RESERVED,	/* col 1 + row 2 */
-	KEY_RESERVED,	/* col 4 + row 3 */
-	KEY_RESERVED,	/* col 3 + row 3 */
-	KEY_RESERVED,	/* col 2 + row 3 */
-	KEY_RESERVED,	/* col 1 + row 3 */
-	KEY_RESERVED,	/* col 4 + row 4 */
-	KEY_RESERVED,	/* col 3 + row 4 */
-	KEY_RESERVED,	/* col 2 + row 4 */
-	KEY_RESERVED,	/* col 1 + row 4 */
-};
-#define PICOLCD_KEYS ARRAY_SIZE(def_keymap)
-
-/* Description of in-progress IO operation, used for operations
- * that trigger response from device */
-struct picolcd_pending {
-	struct hid_report *out_report;
-	struct hid_report *in_report;
-	struct completion ready;
-	int raw_size;
-	u8 raw_data[64];
-};
-
-/* Per device data structure */
-struct picolcd_data {
-	struct hid_device *hdev;
-#ifdef CONFIG_DEBUG_FS
-	struct dentry *debug_reset;
-	struct dentry *debug_eeprom;
-	struct dentry *debug_flash;
-	struct mutex mutex_flash;
-	int addr_sz;
-#endif
-	u8 version[2];
-	unsigned short opmode_delay;
-	/* input stuff */
-	u8 pressed_keys[2];
-	struct input_dev *input_keys;
-	struct input_dev *input_cir;
-	unsigned short keycode[PICOLCD_KEYS];
-
-#ifdef CONFIG_HID_PICOLCD_FB
-	/* Framebuffer stuff */
-	u8 fb_update_rate;
-	u8 fb_bpp;
-	u8 fb_force;
-	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;
-#endif /* CONFIG_HID_PICOLCD_FB */
-#ifdef CONFIG_HID_PICOLCD_LCD
-	struct lcd_device *lcd;
-	u8 lcd_contrast;
-#endif /* CONFIG_HID_PICOLCD_LCD */
-#ifdef CONFIG_HID_PICOLCD_BACKLIGHT
-	struct backlight_device *backlight;
-	u8 lcd_brightness;
-	u8 lcd_power;
-#endif /* CONFIG_HID_PICOLCD_BACKLIGHT */
-#ifdef CONFIG_HID_PICOLCD_LEDS
-	/* LED stuff */
-	u8 led_state;
-	struct led_classdev *led[8];
-#endif /* CONFIG_HID_PICOLCD_LEDS */
-
-	/* Housekeeping stuff */
-	spinlock_t lock;
-	struct mutex mutex;
-	struct picolcd_pending *pending;
-	int status;
-#define PICOLCD_BOOTLOADER 1
-#define PICOLCD_FAILED 2
-#define PICOLCD_READY_FB 4
-};
-
-
-/* Find a given report */
-#define picolcd_in_report(id, dev) picolcd_report(id, dev, HID_INPUT_REPORT)
-#define picolcd_out_report(id, dev) picolcd_report(id, dev, HID_OUTPUT_REPORT)
-
-static struct hid_report *picolcd_report(int id, struct hid_device *hdev, int dir)
-{
-	struct list_head *feature_report_list = &hdev->report_enum[dir].report_list;
-	struct hid_report *report = NULL;
-
-	list_for_each_entry(report, feature_report_list, list) {
-		if (report->id == id)
-			return report;
-	}
-	hid_warn(hdev, "No report with id 0x%x found\n", id);
-	return NULL;
-}
-
-#ifdef CONFIG_DEBUG_FS
-static void picolcd_debug_out_report(struct picolcd_data *data,
-		struct hid_device *hdev, struct hid_report *report);
-#define usbhid_submit_report(a, b, c) \
-	do { \
-		picolcd_debug_out_report(hid_get_drvdata(a), a, b); \
-		usbhid_submit_report(a, b, c); \
-	} while (0)
-#endif
-
-/* Submit a report and wait for a reply from device - if device fades away
- * or does not respond in time, return NULL */
-static struct picolcd_pending *picolcd_send_and_wait(struct hid_device *hdev,
-		int report_id, const u8 *raw_data, int size)
-{
-	struct picolcd_data *data = hid_get_drvdata(hdev);
-	struct picolcd_pending *work;
-	struct hid_report *report = picolcd_out_report(report_id, hdev);
-	unsigned long flags;
-	int i, j, k;
-
-	if (!report || !data)
-		return NULL;
-	if (data->status & PICOLCD_FAILED)
-		return NULL;
-	work = kzalloc(sizeof(*work), GFP_KERNEL);
-	if (!work)
-		return NULL;
-
-	init_completion(&work->ready);
-	work->out_report = report;
-	work->in_report  = NULL;
-	work->raw_size   = 0;
-
-	mutex_lock(&data->mutex);
-	spin_lock_irqsave(&data->lock, flags);
-	for (i = k = 0; i < report->maxfield; i++)
-		for (j = 0; j < report->field[i]->report_count; j++) {
-			hid_set_field(report->field[i], j, k < size ? raw_data[k] : 0);
-			k++;
-		}
-	data->pending = work;
-	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
-	spin_unlock_irqrestore(&data->lock, flags);
-	wait_for_completion_interruptible_timeout(&work->ready, HZ*2);
-	spin_lock_irqsave(&data->lock, flags);
-	data->pending = NULL;
-	spin_unlock_irqrestore(&data->lock, flags);
-	mutex_unlock(&data->mutex);
-	return work;
-}
-
-#ifdef CONFIG_HID_PICOLCD_FB
-/* Send a given tile to PicoLCD */
-static 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);
-	unsigned long flags;
-	u8 *tdata;
-	int i;
-
-	if (!report1 || report1->maxfield != 1 || !report2 || report2->maxfield != 1)
-		return -ENODEV;
-
-	spin_lock_irqsave(&data->lock, flags);
-	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);
-	spin_unlock_irqrestore(&data->lock, flags);
-	return 0;
-}
-
-/* Translate a single tile*/
-static int picolcd_fb_update_tile(u8 *vbitmap, const u8 *bitmap, int bpp,
-		int chip, int tile)
-{
-	int i, b, changed = 0;
-	u8 tdata[64];
-	u8 *vdata = vbitmap + (tile * 4 + chip) * 64;
-
-	if (bpp == 1) {
-		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] >> (i % 8)) & 0x01;
-			}
-		}
-	} else if (bpp == 8) {
-		for (b = 7; b >= 0; b--) {
-			const u8 *bdata = bitmap + (tile * 256 + chip * 8 + b * 32) * 8;
-			for (i = 0; i < 64; i++) {
-				tdata[i] <<= 1;
-				tdata[i] |= (bdata[i] & 0x80) ? 0x01 : 0x00;
-			}
-		}
-	} else {
-		/* Oops, we should never get here! */
-		WARN_ON(1);
-		return 0;
-	}
-
-	for (i = 0; i < 64; i++)
-		if (tdata[i] != vdata[i]) {
-			changed = 1;
-			vdata[i] = tdata[i];
-		}
-	return changed;
-}
-
-/* Reconfigure LCD display */
-static int picolcd_fb_reset(struct picolcd_data *data, int clear)
-{
-	struct hid_report *report = picolcd_out_report(REPORT_LCD_CMD, data->hdev);
-	int i, j;
-	unsigned long flags;
-	static const u8 mapcmd[8] = { 0x00, 0x02, 0x00, 0x64, 0x3f, 0x00, 0x64, 0xc0 };
-
-	if (!report || report->maxfield != 1)
-		return -ENODEV;
-
-	spin_lock_irqsave(&data->lock, flags);
-	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);
-	}
-
-	data->status |= PICOLCD_READY_FB;
-	spin_unlock_irqrestore(&data->lock, flags);
-
-	if (data->fb_bitmap) {
-		if (clear) {
-			memset(data->fb_vbitmap, 0, PICOLCDFB_SIZE);
-			memset(data->fb_bitmap, 0, PICOLCDFB_SIZE*data->fb_bpp);
-		}
-		data->fb_force = 1;
-	}
-
-	/* schedule first output of framebuffer */
-	if (data->fb_info)
-		schedule_delayed_work(&data->fb_info->deferred_work, 0);
-
-	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, n;
-	unsigned long flags;
-
-	if (!data)
-		return;
-
-	spin_lock_irqsave(&data->lock, flags);
-	if (!(data->status & PICOLCD_READY_FB)) {
-		spin_unlock_irqrestore(&data->lock, flags);
-		picolcd_fb_reset(data, 0);
-	} else {
-		spin_unlock_irqrestore(&data->lock, flags);
-	}
-
-	/*
-	 * Translate the framebuffer into the format needed by the PicoLCD.
-	 * See display layout above.
-	 * Do this one tile after the other and push those tiles that changed.
-	 *
-	 * Wait for our IO to complete as otherwise we might flood the queue!
-	 */
-	n = 0;
-	for (chip = 0; chip < 4; chip++)
-		for (tile = 0; tile < 8; tile++)
-			if (picolcd_fb_update_tile(data->fb_vbitmap,
-					data->fb_bitmap, data->fb_bpp, chip, tile) ||
-				data->fb_force) {
-				n += 2;
-				if (!data->fb_info->par)
-					return; /* device lost! */
-				if (n >= HID_OUTPUT_FIFO_SIZE / 2) {
-					usbhid_wait_io(data->hdev);
-					n = 0;
-				}
-				picolcd_fb_send_tile(data->hdev, chip, tile);
-			}
-	data->fb_force = false;
-	if (n)
-		usbhid_wait_io(data->hdev);
-}
-
-/* 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);
-
-	schedule_delayed_work(&info->deferred_work, 0);
-}
-
-/* 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);
-
-	schedule_delayed_work(&info->deferred_work, 0);
-}
-
-/* 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);
-
-	schedule_delayed_work(&info->deferred_work, 0);
-}
-
-/*
- * 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)
-		schedule_delayed_work(&info->deferred_work, 0);
-	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)
-{
-	struct picolcd_data *data = info->par;
-	u32 *ref_cnt = info->pseudo_palette;
-	int may_release;
-
-	info->par = NULL;
-	if (data)
-		data->fb_info = NULL;
-	fb_deferred_io_cleanup(info);
-
-	ref_cnt--;
-	mutex_lock(&info->lock);
-	(*ref_cnt)--;
-	may_release = !*ref_cnt;
-	mutex_unlock(&info->lock);
-	if (may_release) {
-		vfree((u8 *)info->fix.smem_start);
-		framebuffer_release(info);
-	}
-}
-
-static int picolcd_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
-{
-	__u32 bpp      = var->bits_per_pixel;
-	__u32 activate = var->activate;
-
-	/* only allow 1/8 bit depth (8-bit is grayscale) */
-	*var = picolcdfb_var;
-	var->activate = activate;
-	if (bpp >= 8) {
-		var->bits_per_pixel = 8;
-		var->red.length     = 8;
-		var->green.length   = 8;
-		var->blue.length    = 8;
-	} else {
-		var->bits_per_pixel = 1;
-		var->red.length     = 1;
-		var->green.length   = 1;
-		var->blue.length    = 1;
-	}
-	return 0;
-}
-
-static int picolcd_set_par(struct fb_info *info)
-{
-	struct picolcd_data *data = info->par;
-	u8 *tmp_fb, *o_fb;
-	if (!data)
-		return -ENODEV;
-	if (info->var.bits_per_pixel == data->fb_bpp)
-		return 0;
-	/* switch between 1/8 bit depths */
-	if (info->var.bits_per_pixel != 1 && info->var.bits_per_pixel != 8)
-		return -EINVAL;
-
-	o_fb   = data->fb_bitmap;
-	tmp_fb = kmalloc(PICOLCDFB_SIZE*info->var.bits_per_pixel, GFP_KERNEL);
-	if (!tmp_fb)
-		return -ENOMEM;
-
-	/* translate FB content to new bits-per-pixel */
-	if (info->var.bits_per_pixel == 1) {
-		int i, b;
-		for (i = 0; i < PICOLCDFB_SIZE; i++) {
-			u8 p = 0;
-			for (b = 0; b < 8; b++) {
-				p <<= 1;
-				p |= o_fb[i*8+b] ? 0x01 : 0x00;
-			}
-			tmp_fb[i] = p;
-		}
-		memcpy(o_fb, tmp_fb, PICOLCDFB_SIZE);
-		info->fix.visual = FB_VISUAL_MONO01;
-		info->fix.line_length = PICOLCDFB_WIDTH / 8;
-	} else {
-		int i;
-		memcpy(tmp_fb, o_fb, PICOLCDFB_SIZE);
-		for (i = 0; i < PICOLCDFB_SIZE * 8; i++)
-			o_fb[i] = tmp_fb[i/8] & (0x01 << (7 - i % 8)) ? 0xff : 0x00;
-		info->fix.visual = FB_VISUAL_DIRECTCOLOR;
-		info->fix.line_length = PICOLCDFB_WIDTH;
-	}
-
-	kfree(tmp_fb);
-	data->fb_bpp      = info->var.bits_per_pixel;
-	return 0;
-}
-
-/* Do refcounting on our FB and cleanup per worker if FB is
- * closed after unplug of our device
- * (fb_release holds info->lock and still touches info after
- *  we return so we can't release it immediately.
- */
-struct picolcd_fb_cleanup_item {
-	struct fb_info *info;
-	struct picolcd_fb_cleanup_item *next;
-};
-static struct picolcd_fb_cleanup_item *fb_pending;
-static DEFINE_SPINLOCK(fb_pending_lock);
-
-static void picolcd_fb_do_cleanup(struct work_struct *data)
-{
-	struct picolcd_fb_cleanup_item *item;
-	unsigned long flags;
-
-	do {
-		spin_lock_irqsave(&fb_pending_lock, flags);
-		item = fb_pending;
-		fb_pending = item ? item->next : NULL;
-		spin_unlock_irqrestore(&fb_pending_lock, flags);
-
-		if (item) {
-			u8 *fb = (u8 *)item->info->fix.smem_start;
-			/* make sure we do not race against fb core when
-			 * releasing */
-			mutex_lock(&item->info->lock);
-			mutex_unlock(&item->info->lock);
-			framebuffer_release(item->info);
-			vfree(fb);
-		}
-	} while (item);
-}
-
-static DECLARE_WORK(picolcd_fb_cleanup, picolcd_fb_do_cleanup);
-
-static int picolcd_fb_open(struct fb_info *info, int u)
-{
-	u32 *ref_cnt = info->pseudo_palette;
-	ref_cnt--;
-
-	(*ref_cnt)++;
-	return 0;
-}
-
-static int picolcd_fb_release(struct fb_info *info, int u)
-{
-	u32 *ref_cnt = info->pseudo_palette;
-	ref_cnt--;
-
-	(*ref_cnt)++;
-	if (!*ref_cnt) {
-		unsigned long flags;
-		struct picolcd_fb_cleanup_item *item = (struct picolcd_fb_cleanup_item *)ref_cnt;
-		item--;
-		spin_lock_irqsave(&fb_pending_lock, flags);
-		item->next = fb_pending;
-		fb_pending = item;
-		spin_unlock_irqrestore(&fb_pending_lock, flags);
-		schedule_work(&picolcd_fb_cleanup);
-	}
-	return 0;
-}
-
-/* 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_open      = picolcd_fb_open,
-	.fb_release   = picolcd_fb_release,
-	.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,
-	.fb_check_var = picolcd_fb_check_var,
-	.fb_set_par   = picolcd_set_par,
-};
-
-
-/* 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" sysfs 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 i, fb_update_rate = data->fb_update_rate;
-	size_t ret = 0;
-
-	for (i = 1; i <= PICOLCDFB_UPDATE_RATE_LIMIT; i++)
-		if (ret >= PAGE_SIZE)
-			break;
-		else if (i == fb_update_rate)
-			ret += snprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i);
-		else
-			ret += snprintf(buf+ret, PAGE_SIZE-ret, "%u ", i);
-	if (ret > 0)
-		buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n';
-	return ret;
-}
-
-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);
-
-/* initialize Framebuffer device */
-static int picolcd_init_framebuffer(struct picolcd_data *data)
-{
-	struct device *dev = &data->hdev->dev;
-	struct fb_info *info = NULL;
-	int i, error = -ENOMEM;
-	u8 *fb_vbitmap = NULL;
-	u8 *fb_bitmap  = NULL;
-	u32 *palette;
-
-	fb_bitmap = vmalloc(PICOLCDFB_SIZE*8);
-	if (fb_bitmap == NULL) {
-		dev_err(dev, "can't get a free page for framebuffer\n");
-		goto err_nomem;
-	}
-
-	fb_vbitmap = kmalloc(PICOLCDFB_SIZE, GFP_KERNEL);
-	if (fb_vbitmap == NULL) {
-		dev_err(dev, "can't alloc vbitmap image buffer\n");
-		goto err_nomem;
-	}
-
-	data->fb_update_rate = PICOLCDFB_UPDATE_RATE_DEFAULT;
-	data->fb_defio = picolcd_fb_defio;
-	/* The extra memory is:
-	 * - struct picolcd_fb_cleanup_item
-	 * - u32 for ref_count
-	 * - 256*u32 for pseudo_palette
-	 */
-	info = framebuffer_alloc(257 * sizeof(u32) + sizeof(struct picolcd_fb_cleanup_item), dev);
-	if (info == NULL) {
-		dev_err(dev, "failed to allocate a framebuffer\n");
-		goto err_nomem;
-	}
-
-	palette  = info->par + sizeof(struct picolcd_fb_cleanup_item);
-	*palette = 1;
-	palette++;
-	for (i = 0; i < 256; i++)
-		palette[i] = i > 0 && i < 16 ? 0xff : 0;
-	info->pseudo_palette = palette;
-	info->fbdefio = &data->fb_defio;
-	info->screen_base = (char __force __iomem *)fb_bitmap;
-	info->fbops = &picolcdfb_ops;
-	info->var = picolcdfb_var;
-	info->fix = picolcdfb_fix;
-	info->fix.smem_len   = PICOLCDFB_SIZE*8;
-	info->fix.smem_start = (unsigned long)fb_bitmap;
-	info->par = data;
-	info->flags = FBINFO_FLAG_DEFAULT;
-
-	data->fb_vbitmap = fb_vbitmap;
-	data->fb_bitmap  = fb_bitmap;
-	data->fb_bpp     = picolcdfb_var.bits_per_pixel;
-	error = picolcd_fb_reset(data, 1);
-	if (error) {
-		dev_err(dev, "failed to configure display\n");
-		goto err_cleanup;
-	}
-	error = device_create_file(dev, &dev_attr_fb_update_rate);
-	if (error) {
-		dev_err(dev, "failed to create sysfs attributes\n");
-		goto err_cleanup;
-	}
-	fb_deferred_io_init(info);
-	data->fb_info    = info;
-	error = register_framebuffer(info);
-	if (error) {
-		dev_err(dev, "failed to register framebuffer\n");
-		goto err_sysfs;
-	}
-	/* schedule first output of framebuffer */
-	data->fb_force = 1;
-	schedule_delayed_work(&info->deferred_work, 0);
-	return 0;
-
-err_sysfs:
-	fb_deferred_io_cleanup(info);
-	device_remove_file(dev, &dev_attr_fb_update_rate);
-err_cleanup:
-	data->fb_vbitmap = NULL;
-	data->fb_bitmap  = NULL;
-	data->fb_bpp     = 0;
-	data->fb_info    = NULL;
-
-err_nomem:
-	framebuffer_release(info);
-	vfree(fb_bitmap);
-	kfree(fb_vbitmap);
-	return error;
-}
-
-static void picolcd_exit_framebuffer(struct picolcd_data *data)
-{
-	struct fb_info *info = data->fb_info;
-	u8 *fb_vbitmap = data->fb_vbitmap;
-
-	if (!info)
-		return;
-
-	info->par = NULL;
-	device_remove_file(&data->hdev->dev, &dev_attr_fb_update_rate);
-	unregister_framebuffer(info);
-	data->fb_vbitmap = NULL;
-	data->fb_bitmap  = NULL;
-	data->fb_bpp     = 0;
-	data->fb_info    = NULL;
-	kfree(fb_vbitmap);
-}
-
-#define picolcd_fbinfo(d) ((d)->fb_info)
-#else
-static inline int picolcd_fb_reset(struct picolcd_data *data, int clear)
-{
-	return 0;
-}
-static inline int picolcd_init_framebuffer(struct picolcd_data *data)
-{
-	return 0;
-}
-static inline void picolcd_exit_framebuffer(struct picolcd_data *data)
-{
-}
-#define picolcd_fbinfo(d) NULL
-#endif /* CONFIG_HID_PICOLCD_FB */
-
-#ifdef CONFIG_HID_PICOLCD_BACKLIGHT
-/*
- * 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);
-	unsigned long flags;
-
-	if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
-		return -ENODEV;
-
-	data->lcd_brightness = bdev->props.brightness & 0x0ff;
-	data->lcd_power      = bdev->props.power;
-	spin_lock_irqsave(&data->lock, flags);
-	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);
-	spin_unlock_irqrestore(&data->lock, flags);
-	return 0;
-}
-
-static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb)
-{
-	return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev));
-}
-
-static const struct backlight_ops picolcd_blops = {
-	.update_status  = picolcd_set_brightness,
-	.get_brightness = picolcd_get_brightness,
-	.check_fb       = picolcd_check_bl_fb,
-};
-
-static int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report)
-{
-	struct device *dev = &data->hdev->dev;
-	struct backlight_device *bdev;
-	struct backlight_properties props;
-	if (!report)
-		return -ENODEV;
-	if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
-			report->field[0]->report_size != 8) {
-		dev_err(dev, "unsupported BRIGHTNESS report");
-		return -EINVAL;
-	}
-
-	memset(&props, 0, sizeof(props));
-	props.type = BACKLIGHT_RAW;
-	props.max_brightness = 0xff;
-	bdev = backlight_device_register(dev_name(dev), dev, data,
-			&picolcd_blops, &props);
-	if (IS_ERR(bdev)) {
-		dev_err(dev, "failed to register backlight\n");
-		return PTR_ERR(bdev);
-	}
-	bdev->props.brightness     = 0xff;
-	data->lcd_brightness       = 0xff;
-	data->backlight            = bdev;
-	picolcd_set_brightness(bdev);
-	return 0;
-}
-
-static void picolcd_exit_backlight(struct picolcd_data *data)
-{
-	struct backlight_device *bdev = data->backlight;
-
-	data->backlight = NULL;
-	if (bdev)
-		backlight_device_unregister(bdev);
-}
-
-static inline int picolcd_resume_backlight(struct picolcd_data *data)
-{
-	if (!data->backlight)
-		return 0;
-	return picolcd_set_brightness(data->backlight);
-}
-
-#ifdef CONFIG_PM
-static void picolcd_suspend_backlight(struct picolcd_data *data)
-{
-	int bl_power = data->lcd_power;
-	if (!data->backlight)
-		return;
-
-	data->backlight->props.power = FB_BLANK_POWERDOWN;
-	picolcd_set_brightness(data->backlight);
-	data->lcd_power = data->backlight->props.power = bl_power;
-}
-#endif /* CONFIG_PM */
-#else
-static inline int picolcd_init_backlight(struct picolcd_data *data,
-		struct hid_report *report)
-{
-	return 0;
-}
-static inline void picolcd_exit_backlight(struct picolcd_data *data)
-{
-}
-static inline int picolcd_resume_backlight(struct picolcd_data *data)
-{
-	return 0;
-}
-static inline void picolcd_suspend_backlight(struct picolcd_data *data)
-{
-}
-#endif /* CONFIG_HID_PICOLCD_BACKLIGHT */
-
-#ifdef CONFIG_HID_PICOLCD_LCD
-/*
- * lcd class device
- */
-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);
-	unsigned long flags;
-
-	if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
-		return -ENODEV;
-
-	data->lcd_contrast = contrast & 0x0ff;
-	spin_lock_irqsave(&data->lock, flags);
-	hid_set_field(report->field[0], 0, data->lcd_contrast);
-	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
-	spin_unlock_irqrestore(&data->lock, flags);
-	return 0;
-}
-
-static int picolcd_check_lcd_fb(struct lcd_device *ldev, struct fb_info *fb)
-{
-	return fb && fb == picolcd_fbinfo((struct picolcd_data *)lcd_get_data(ldev));
-}
-
-static struct lcd_ops picolcd_lcdops = {
-	.get_contrast   = picolcd_get_contrast,
-	.set_contrast   = picolcd_set_contrast,
-	.check_fb       = picolcd_check_lcd_fb,
-};
-
-static int picolcd_init_lcd(struct picolcd_data *data, struct hid_report *report)
-{
-	struct device *dev = &data->hdev->dev;
-	struct lcd_device *ldev;
-
-	if (!report)
-		return -ENODEV;
-	if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
-			report->field[0]->report_size != 8) {
-		dev_err(dev, "unsupported CONTRAST report");
-		return -EINVAL;
-	}
-
-	ldev = lcd_device_register(dev_name(dev), dev, data, &picolcd_lcdops);
-	if (IS_ERR(ldev)) {
-		dev_err(dev, "failed to register LCD\n");
-		return PTR_ERR(ldev);
-	}
-	ldev->props.max_contrast = 0x0ff;
-	data->lcd_contrast = 0xe5;
-	data->lcd = ldev;
-	picolcd_set_contrast(ldev, 0xe5);
-	return 0;
-}
-
-static void picolcd_exit_lcd(struct picolcd_data *data)
-{
-	struct lcd_device *ldev = data->lcd;
-
-	data->lcd = NULL;
-	if (ldev)
-		lcd_device_unregister(ldev);
-}
-
-static inline int picolcd_resume_lcd(struct picolcd_data *data)
-{
-	if (!data->lcd)
-		return 0;
-	return picolcd_set_contrast(data->lcd, data->lcd_contrast);
-}
-#else
-static inline int picolcd_init_lcd(struct picolcd_data *data,
-		struct hid_report *report)
-{
-	return 0;
-}
-static inline void picolcd_exit_lcd(struct picolcd_data *data)
-{
-}
-static inline int picolcd_resume_lcd(struct picolcd_data *data)
-{
-	return 0;
-}
-#endif /* CONFIG_HID_PICOLCD_LCD */
-
-#ifdef CONFIG_HID_PICOLCD_LEDS
-/**
- * LED class device
- */
-static void picolcd_leds_set(struct picolcd_data *data)
-{
-	struct hid_report *report;
-	unsigned long flags;
-
-	if (!data->led[0])
-		return;
-	report = picolcd_out_report(REPORT_LED_STATE, data->hdev);
-	if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
-		return;
-
-	spin_lock_irqsave(&data->lock, flags);
-	hid_set_field(report->field[0], 0, data->led_state);
-	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
-	spin_unlock_irqrestore(&data->lock, flags);
-}
-
-static void picolcd_led_set_brightness(struct led_classdev *led_cdev,
-			enum led_brightness value)
-{
-	struct device *dev;
-	struct hid_device *hdev;
-	struct picolcd_data *data;
-	int i, state = 0;
-
-	dev  = led_cdev->dev->parent;
-	hdev = container_of(dev, struct hid_device, dev);
-	data = hid_get_drvdata(hdev);
-	for (i = 0; i < 8; i++) {
-		if (led_cdev != data->led[i])
-			continue;
-		state = (data->led_state >> i) & 1;
-		if (value == LED_OFF && state) {
-			data->led_state &= ~(1 << i);
-			picolcd_leds_set(data);
-		} else if (value != LED_OFF && !state) {
-			data->led_state |= 1 << i;
-			picolcd_leds_set(data);
-		}
-		break;
-	}
-}
-
-static enum led_brightness picolcd_led_get_brightness(struct led_classdev *led_cdev)
-{
-	struct device *dev;
-	struct hid_device *hdev;
-	struct picolcd_data *data;
-	int i, value = 0;
-
-	dev  = led_cdev->dev->parent;
-	hdev = container_of(dev, struct hid_device, dev);
-	data = hid_get_drvdata(hdev);
-	for (i = 0; i < 8; i++)
-		if (led_cdev == data->led[i]) {
-			value = (data->led_state >> i) & 1;
-			break;
-		}
-	return value ? LED_FULL : LED_OFF;
-}
-
-static int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report)
-{
-	struct device *dev = &data->hdev->dev;
-	struct led_classdev *led;
-	size_t name_sz = strlen(dev_name(dev)) + 8;
-	char *name;
-	int i, ret = 0;
-
-	if (!report)
-		return -ENODEV;
-	if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
-			report->field[0]->report_size != 8) {
-		dev_err(dev, "unsupported LED_STATE report");
-		return -EINVAL;
-	}
-
-	for (i = 0; i < 8; i++) {
-		led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
-		if (!led) {
-			dev_err(dev, "can't allocate memory for LED %d\n", i);
-			ret = -ENOMEM;
-			goto err;
-		}
-		name = (void *)(&led[1]);
-		snprintf(name, name_sz, "%s::GPO%d", dev_name(dev), i);
-		led->name = name;
-		led->brightness = 0;
-		led->max_brightness = 1;
-		led->brightness_get = picolcd_led_get_brightness;
-		led->brightness_set = picolcd_led_set_brightness;
-
-		data->led[i] = led;
-		ret = led_classdev_register(dev, data->led[i]);
-		if (ret) {
-			data->led[i] = NULL;
-			kfree(led);
-			dev_err(dev, "can't register LED %d\n", i);
-			goto err;
-		}
-	}
-	return 0;
-err:
-	for (i = 0; i < 8; i++)
-		if (data->led[i]) {
-			led = data->led[i];
-			data->led[i] = NULL;
-			led_classdev_unregister(led);
-			kfree(led);
-		}
-	return ret;
-}
-
-static void picolcd_exit_leds(struct picolcd_data *data)
-{
-	struct led_classdev *led;
-	int i;
-
-	for (i = 0; i < 8; i++) {
-		led = data->led[i];
-		data->led[i] = NULL;
-		if (!led)
-			continue;
-		led_classdev_unregister(led);
-		kfree(led);
-	}
-}
-
-#else
-static inline int picolcd_init_leds(struct picolcd_data *data,
-		struct hid_report *report)
-{
-	return 0;
-}
-static inline void picolcd_exit_leds(struct picolcd_data *data)
-{
-}
-static inline int picolcd_leds_set(struct picolcd_data *data)
-{
-	return 0;
-}
-#endif /* CONFIG_HID_PICOLCD_LEDS */
-
-/*
- * input class device
- */
-static int picolcd_raw_keypad(struct picolcd_data *data,
-		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
-	 */
-	int i, j;
-
-	/* determine newly pressed keys */
-	for (i = 0; i < size; i++) {
-		unsigned 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 (raw_data[i] < PICOLCD_KEYS)
-			key_code = data->keycode[raw_data[i]];
-		else
-			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++) {
-		unsigned 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 (data->pressed_keys[j] < PICOLCD_KEYS)
-			key_code = data->keycode[data->pressed_keys[j]];
-		else
-			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;
-}
-
-static int picolcd_raw_cir(struct picolcd_data *data,
-		struct hid_report *report, u8 *raw_data, int size)
-{
-	/* Need understanding of CIR data format to implement ... */
-	return 1;
-}
-
-static int picolcd_check_version(struct hid_device *hdev)
-{
-	struct picolcd_data *data = hid_get_drvdata(hdev);
-	struct picolcd_pending *verinfo;
-	int ret = 0;
-
-	if (!data)
-		return -ENODEV;
-
-	verinfo = picolcd_send_and_wait(hdev, REPORT_VERSION, NULL, 0);
-	if (!verinfo) {
-		hid_err(hdev, "no version response from PicoLCD\n");
-		return -ENODEV;
-	}
-
-	if (verinfo->raw_size == 2) {
-		data->version[0] = verinfo->raw_data[1];
-		data->version[1] = verinfo->raw_data[0];
-		if (data->status & PICOLCD_BOOTLOADER) {
-			hid_info(hdev, "PicoLCD, bootloader version %d.%d\n",
-				 verinfo->raw_data[1], verinfo->raw_data[0]);
-		} else {
-			hid_info(hdev, "PicoLCD, firmware version %d.%d\n",
-				 verinfo->raw_data[1], verinfo->raw_data[0]);
-		}
-	} else {
-		hid_err(hdev, "confused, got unexpected version response from PicoLCD\n");
-		ret = -EINVAL;
-	}
-	kfree(verinfo);
-	return ret;
-}
-
-/*
- * 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 *report = picolcd_out_report(REPORT_RESET, hdev);
-	unsigned long flags;
-	int error;
-
-	if (!data || !report || report->maxfield != 1)
-		return -ENODEV;
-
-	spin_lock_irqsave(&data->lock, flags);
-	if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
-		data->status |= PICOLCD_BOOTLOADER;
-
-	/* perform the reset */
-	hid_set_field(report->field[0], 0, 1);
-	usbhid_submit_report(hdev, report, USB_DIR_OUT);
-	spin_unlock_irqrestore(&data->lock, flags);
-
-	error = picolcd_check_version(hdev);
-	if (error)
-		return error;
-
-	picolcd_resume_lcd(data);
-	picolcd_resume_backlight(data);
-#ifdef CONFIG_HID_PICOLCD_FB
-	if (data->fb_info)
-		schedule_delayed_work(&data->fb_info->deferred_work, 0);
-#endif /* CONFIG_HID_PICOLCD_FB */
-
-	picolcd_leds_set(data);
-	return 0;
-}
-
-/*
- * The "operation_mode" sysfs attribute
- */
-static ssize_t picolcd_operation_mode_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct picolcd_data *data = dev_get_drvdata(dev);
-
-	if (data->status & PICOLCD_BOOTLOADER)
-		return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
-	else
-		return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
-}
-
-static ssize_t picolcd_operation_mode_store(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct picolcd_data *data = dev_get_drvdata(dev);
-	struct hid_report *report = NULL;
-	size_t cnt = count;
-	int timeout = data->opmode_delay;
-	unsigned long flags;
-
-	if (cnt >= 3 && strncmp("lcd", buf, 3) == 0) {
-		if (data->status & PICOLCD_BOOTLOADER)
-			report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev);
-		buf += 3;
-		cnt -= 3;
-	} else if (cnt >= 10 && strncmp("bootloader", buf, 10) == 0) {
-		if (!(data->status & PICOLCD_BOOTLOADER))
-			report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev);
-		buf += 10;
-		cnt -= 10;
-	}
-	if (!report)
-		return -EINVAL;
-
-	while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r'))
-		cnt--;
-	if (cnt != 0)
-		return -EINVAL;
-
-	spin_lock_irqsave(&data->lock, flags);
-	hid_set_field(report->field[0], 0, timeout & 0xff);
-	hid_set_field(report->field[0], 1, (timeout >> 8) & 0xff);
-	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
-	spin_unlock_irqrestore(&data->lock, flags);
-	return count;
-}
-
-static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show,
-		picolcd_operation_mode_store);
-
-/*
- * The "operation_mode_delay" sysfs attribute
- */
-static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct picolcd_data *data = dev_get_drvdata(dev);
-
-	return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
-}
-
-static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct picolcd_data *data = dev_get_drvdata(dev);
-	unsigned u;
-	if (sscanf(buf, "%u", &u) != 1)
-		return -EINVAL;
-	if (u > 30000)
-		return -EINVAL;
-	else
-		data->opmode_delay = u;
-	return count;
-}
-
-static DEVICE_ATTR(operation_mode_delay, 0644, picolcd_operation_mode_delay_show,
-		picolcd_operation_mode_delay_store);
-
-
-#ifdef CONFIG_DEBUG_FS
-/*
- * The "reset" file
- */
-static int picolcd_debug_reset_show(struct seq_file *f, void *p)
-{
-	if (picolcd_fbinfo((struct picolcd_data *)f->private))
-		seq_printf(f, "all fb\n");
-	else
-		seq_printf(f, "all\n");
-	return 0;
-}
-
-static int picolcd_debug_reset_open(struct inode *inode, struct file *f)
-{
-	return single_open(f, picolcd_debug_reset_show, inode->i_private);
-}
-
-static ssize_t picolcd_debug_reset_write(struct file *f, const char __user *user_buf,
-		size_t count, loff_t *ppos)
-{
-	struct picolcd_data *data = ((struct seq_file *)f->private_data)->private;
-	char buf[32];
-	size_t cnt = min(count, sizeof(buf)-1);
-	if (copy_from_user(buf, user_buf, cnt))
-		return -EFAULT;
-
-	while (cnt > 0 && (buf[cnt-1] == ' ' || buf[cnt-1] == '\n'))
-		cnt--;
-	buf[cnt] = '\0';
-	if (strcmp(buf, "all") == 0) {
-		picolcd_reset(data->hdev);
-		picolcd_fb_reset(data, 1);
-	} else if (strcmp(buf, "fb") == 0) {
-		picolcd_fb_reset(data, 1);
-	} else {
-		return -EINVAL;
-	}
-	return count;
-}
-
-static const struct file_operations picolcd_debug_reset_fops = {
-	.owner    = THIS_MODULE,
-	.open     = picolcd_debug_reset_open,
-	.read     = seq_read,
-	.llseek   = seq_lseek,
-	.write    = picolcd_debug_reset_write,
-	.release  = single_release,
-};
-
-/*
- * The "eeprom" file
- */
-static ssize_t picolcd_debug_eeprom_read(struct file *f, char __user *u,
-		size_t s, loff_t *off)
-{
-	struct picolcd_data *data = f->private_data;
-	struct picolcd_pending *resp;
-	u8 raw_data[3];
-	ssize_t ret = -EIO;
-
-	if (s == 0)
-		return -EINVAL;
-	if (*off > 0x0ff)
-		return 0;
-
-	/* prepare buffer with info about what we want to read (addr & len) */
-	raw_data[0] = *off & 0xff;
-	raw_data[1] = (*off >> 8) & 0xff;
-	raw_data[2] = s < 20 ? s : 20;
-	if (*off + raw_data[2] > 0xff)
-		raw_data[2] = 0x100 - *off;
-	resp = picolcd_send_and_wait(data->hdev, REPORT_EE_READ, raw_data,
-			sizeof(raw_data));
-	if (!resp)
-		return -EIO;
-
-	if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) {
-		/* successful read :) */
-		ret = resp->raw_data[2];
-		if (ret > s)
-			ret = s;
-		if (copy_to_user(u, resp->raw_data+3, ret))
-			ret = -EFAULT;
-		else
-			*off += ret;
-	} /* anything else is some kind of IO error */
-
-	kfree(resp);
-	return ret;
-}
-
-static ssize_t picolcd_debug_eeprom_write(struct file *f, const char __user *u,
-		size_t s, loff_t *off)
-{
-	struct picolcd_data *data = f->private_data;
-	struct picolcd_pending *resp;
-	ssize_t ret = -EIO;
-	u8 raw_data[23];
-
-	if (s == 0)
-		return -EINVAL;
-	if (*off > 0x0ff)
-		return -ENOSPC;
-
-	memset(raw_data, 0, sizeof(raw_data));
-	raw_data[0] = *off & 0xff;
-	raw_data[1] = (*off >> 8) & 0xff;
-	raw_data[2] = min((size_t)20, s);
-	if (*off + raw_data[2] > 0xff)
-		raw_data[2] = 0x100 - *off;
-
-	if (copy_from_user(raw_data+3, u, min((u8)20, raw_data[2])))
-		return -EFAULT;
-	resp = picolcd_send_and_wait(data->hdev, REPORT_EE_WRITE, raw_data,
-			sizeof(raw_data));
-
-	if (!resp)
-		return -EIO;
-
-	if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) {
-		/* check if written data matches */
-		if (memcmp(raw_data, resp->raw_data, 3+raw_data[2]) == 0) {
-			*off += raw_data[2];
-			ret = raw_data[2];
-		}
-	}
-	kfree(resp);
-	return ret;
-}
-
-/*
- * Notes:
- * - read/write happens in chunks of at most 20 bytes, it's up to userspace
- *   to loop in order to get more data.
- * - on write errors on otherwise correct write request the bytes
- *   that should have been written are in undefined state.
- */
-static const struct file_operations picolcd_debug_eeprom_fops = {
-	.owner    = THIS_MODULE,
-	.open     = simple_open,
-	.read     = picolcd_debug_eeprom_read,
-	.write    = picolcd_debug_eeprom_write,
-	.llseek   = generic_file_llseek,
-};
-
-/*
- * The "flash" file
- */
-/* record a flash address to buf (bounds check to be done by caller) */
-static int _picolcd_flash_setaddr(struct picolcd_data *data, u8 *buf, long off)
-{
-	buf[0] = off & 0xff;
-	buf[1] = (off >> 8) & 0xff;
-	if (data->addr_sz == 3)
-		buf[2] = (off >> 16) & 0xff;
-	return data->addr_sz == 2 ? 2 : 3;
-}
-
-/* read a given size of data (bounds check to be done by caller) */
-static ssize_t _picolcd_flash_read(struct picolcd_data *data, int report_id,
-		char __user *u, size_t s, loff_t *off)
-{
-	struct picolcd_pending *resp;
-	u8 raw_data[4];
-	ssize_t ret = 0;
-	int len_off, err = -EIO;
-
-	while (s > 0) {
-		err = -EIO;
-		len_off = _picolcd_flash_setaddr(data, raw_data, *off);
-		raw_data[len_off] = s > 32 ? 32 : s;
-		resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1);
-		if (!resp || !resp->in_report)
-			goto skip;
-		if (resp->in_report->id == REPORT_MEMORY ||
-			resp->in_report->id == REPORT_BL_READ_MEMORY) {
-			if (memcmp(raw_data, resp->raw_data, len_off+1) != 0)
-				goto skip;
-			if (copy_to_user(u+ret, resp->raw_data+len_off+1, raw_data[len_off])) {
-				err = -EFAULT;
-				goto skip;
-			}
-			*off += raw_data[len_off];
-			s    -= raw_data[len_off];
-			ret  += raw_data[len_off];
-			err   = 0;
-		}
-skip:
-		kfree(resp);
-		if (err)
-			return ret > 0 ? ret : err;
-	}
-	return ret;
-}
-
-static ssize_t picolcd_debug_flash_read(struct file *f, char __user *u,
-		size_t s, loff_t *off)
-{
-	struct picolcd_data *data = f->private_data;
-
-	if (s == 0)
-		return -EINVAL;
-	if (*off > 0x05fff)
-		return 0;
-	if (*off + s > 0x05fff)
-		s = 0x06000 - *off;
-
-	if (data->status & PICOLCD_BOOTLOADER)
-		return _picolcd_flash_read(data, REPORT_BL_READ_MEMORY, u, s, off);
-	else
-		return _picolcd_flash_read(data, REPORT_READ_MEMORY, u, s, off);
-}
-
-/* erase block aligned to 64bytes boundary */
-static ssize_t _picolcd_flash_erase64(struct picolcd_data *data, int report_id,
-		loff_t *off)
-{
-	struct picolcd_pending *resp;
-	u8 raw_data[3];
-	int len_off;
-	ssize_t ret = -EIO;
-
-	if (*off & 0x3f)
-		return -EINVAL;
-
-	len_off = _picolcd_flash_setaddr(data, raw_data, *off);
-	resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off);
-	if (!resp || !resp->in_report)
-		goto skip;
-	if (resp->in_report->id == REPORT_MEMORY ||
-		resp->in_report->id == REPORT_BL_ERASE_MEMORY) {
-		if (memcmp(raw_data, resp->raw_data, len_off) != 0)
-			goto skip;
-		ret = 0;
-	}
-skip:
-	kfree(resp);
-	return ret;
-}
-
-/* write a given size of data (bounds check to be done by caller) */
-static ssize_t _picolcd_flash_write(struct picolcd_data *data, int report_id,
-		const char __user *u, size_t s, loff_t *off)
-{
-	struct picolcd_pending *resp;
-	u8 raw_data[36];
-	ssize_t ret = 0;
-	int len_off, err = -EIO;
-
-	while (s > 0) {
-		err = -EIO;
-		len_off = _picolcd_flash_setaddr(data, raw_data, *off);
-		raw_data[len_off] = s > 32 ? 32 : s;
-		if (copy_from_user(raw_data+len_off+1, u, raw_data[len_off])) {
-			err = -EFAULT;
-			break;
-		}
-		resp = picolcd_send_and_wait(data->hdev, report_id, raw_data,
-				len_off+1+raw_data[len_off]);
-		if (!resp || !resp->in_report)
-			goto skip;
-		if (resp->in_report->id == REPORT_MEMORY ||
-			resp->in_report->id == REPORT_BL_WRITE_MEMORY) {
-			if (memcmp(raw_data, resp->raw_data, len_off+1+raw_data[len_off]) != 0)
-				goto skip;
-			*off += raw_data[len_off];
-			s    -= raw_data[len_off];
-			ret  += raw_data[len_off];
-			err   = 0;
-		}
-skip:
-		kfree(resp);
-		if (err)
-			break;
-	}
-	return ret > 0 ? ret : err;
-}
-
-static ssize_t picolcd_debug_flash_write(struct file *f, const char __user *u,
-		size_t s, loff_t *off)
-{
-	struct picolcd_data *data = f->private_data;
-	ssize_t err, ret = 0;
-	int report_erase, report_write;
-
-	if (s == 0)
-		return -EINVAL;
-	if (*off > 0x5fff)
-		return -ENOSPC;
-	if (s & 0x3f)
-		return -EINVAL;
-	if (*off & 0x3f)
-		return -EINVAL;
-
-	if (data->status & PICOLCD_BOOTLOADER) {
-		report_erase = REPORT_BL_ERASE_MEMORY;
-		report_write = REPORT_BL_WRITE_MEMORY;
-	} else {
-		report_erase = REPORT_ERASE_MEMORY;
-		report_write = REPORT_WRITE_MEMORY;
-	}
-	mutex_lock(&data->mutex_flash);
-	while (s > 0) {
-		err = _picolcd_flash_erase64(data, report_erase, off);
-		if (err)
-			break;
-		err = _picolcd_flash_write(data, report_write, u, 64, off);
-		if (err < 0)
-			break;
-		ret += err;
-		*off += err;
-		s -= err;
-		if (err != 64)
-			break;
-	}
-	mutex_unlock(&data->mutex_flash);
-	return ret > 0 ? ret : err;
-}
-
-/*
- * Notes:
- * - concurrent writing is prevented by mutex and all writes must be
- *   n*64 bytes and 64-byte aligned, each write being preceded by an
- *   ERASE which erases a 64byte block.
- *   If less than requested was written or an error is returned for an
- *   otherwise correct write request the next 64-byte block which should
- *   have been written is in undefined state (mostly: original, erased,
- *   (half-)written with write error)
- * - reading can happen without special restriction
- */
-static const struct file_operations picolcd_debug_flash_fops = {
-	.owner    = THIS_MODULE,
-	.open     = simple_open,
-	.read     = picolcd_debug_flash_read,
-	.write    = picolcd_debug_flash_write,
-	.llseek   = generic_file_llseek,
-};
-
-
-/*
- * Helper code for HID report level dumping/debugging
- */
-static const char *error_codes[] = {
-	"success", "parameter missing", "data_missing", "block readonly",
-	"block not erasable", "block too big", "section overflow",
-	"invalid command length", "invalid data length",
-};
-
-static void dump_buff_as_hex(char *dst, size_t dst_sz, const u8 *data,
-		const size_t data_len)
-{
-	int i, j;
-	for (i = j = 0; i < data_len && j + 3 < dst_sz; i++) {
-		dst[j++] = hex_asc[(data[i] >> 4) & 0x0f];
-		dst[j++] = hex_asc[data[i] & 0x0f];
-		dst[j++] = ' ';
-	}
-	if (j < dst_sz) {
-		dst[j--] = '\0';
-		dst[j] = '\n';
-	} else
-		dst[j] = '\0';
-}
-
-static void picolcd_debug_out_report(struct picolcd_data *data,
-		struct hid_device *hdev, struct hid_report *report)
-{
-	u8 raw_data[70];
-	int raw_size = (report->size >> 3) + 1;
-	char *buff;
-#define BUFF_SZ 256
-
-	/* Avoid unnecessary overhead if debugfs is disabled */
-	if (list_empty(&hdev->debug_list))
-		return;
-
-	buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
-	if (!buff)
-		return;
-
-	snprintf(buff, BUFF_SZ, "\nout report %d (size %d) =  ",
-			report->id, raw_size);
-	hid_debug_event(hdev, buff);
-	if (raw_size + 5 > sizeof(raw_data)) {
-		kfree(buff);
-		hid_debug_event(hdev, " TOO BIG\n");
-		return;
-	} else {
-		raw_data[0] = report->id;
-		hid_output_report(report, raw_data);
-		dump_buff_as_hex(buff, BUFF_SZ, raw_data, raw_size);
-		hid_debug_event(hdev, buff);
-	}
-
-	switch (report->id) {
-	case REPORT_LED_STATE:
-		/* 1 data byte with GPO state */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_LED_STATE", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tGPO state: 0x%02x\n", raw_data[1]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_BRIGHTNESS:
-		/* 1 data byte with brightness */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_BRIGHTNESS", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tBrightness: 0x%02x\n", raw_data[1]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_CONTRAST:
-		/* 1 data byte with contrast */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_CONTRAST", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tContrast: 0x%02x\n", raw_data[1]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_RESET:
-		/* 2 data bytes with reset duration in ms */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_RESET", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tDuration: 0x%02x%02x (%dms)\n",
-				raw_data[2], raw_data[1], raw_data[2] << 8 | raw_data[1]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_LCD_CMD:
-		/* 63 data bytes with LCD commands */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_LCD_CMD", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		/* TODO: format decoding */
-		break;
-	case REPORT_LCD_DATA:
-		/* 63 data bytes with LCD data */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_LCD_CMD", report->id, raw_size-1);
-		/* TODO: format decoding */
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_LCD_CMD_DATA:
-		/* 63 data bytes with LCD commands and data */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_LCD_CMD", report->id, raw_size-1);
-		/* TODO: format decoding */
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_EE_READ:
-		/* 3 data bytes with read area description */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_EE_READ", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
-				raw_data[2], raw_data[1]);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_EE_WRITE:
-		/* 3+1..20 data bytes with write area description */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_EE_WRITE", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
-				raw_data[2], raw_data[1]);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
-		hid_debug_event(hdev, buff);
-		if (raw_data[3] == 0) {
-			snprintf(buff, BUFF_SZ, "\tNo data\n");
-		} else if (raw_data[3] + 4 <= raw_size) {
-			snprintf(buff, BUFF_SZ, "\tData: ");
-			hid_debug_event(hdev, buff);
-			dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
-		} else {
-			snprintf(buff, BUFF_SZ, "\tData overflowed\n");
-		}
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_ERASE_MEMORY:
-	case REPORT_BL_ERASE_MEMORY:
-		/* 3 data bytes with pointer inside erase block */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_ERASE_MEMORY", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		switch (data->addr_sz) {
-		case 2:
-			snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x\n",
-					raw_data[2], raw_data[1]);
-			break;
-		case 3:
-			snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x%02x\n",
-					raw_data[3], raw_data[2], raw_data[1]);
-			break;
-		default:
-			snprintf(buff, BUFF_SZ, "\tNot supported\n");
-		}
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_READ_MEMORY:
-	case REPORT_BL_READ_MEMORY:
-		/* 4 data bytes with read area description */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_READ_MEMORY", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		switch (data->addr_sz) {
-		case 2:
-			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
-					raw_data[2], raw_data[1]);
-			hid_debug_event(hdev, buff);
-			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
-			break;
-		case 3:
-			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
-					raw_data[3], raw_data[2], raw_data[1]);
-			hid_debug_event(hdev, buff);
-			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
-			break;
-		default:
-			snprintf(buff, BUFF_SZ, "\tNot supported\n");
-		}
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_WRITE_MEMORY:
-	case REPORT_BL_WRITE_MEMORY:
-		/* 4+1..32 data bytes with write adrea description */
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_WRITE_MEMORY", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		switch (data->addr_sz) {
-		case 2:
-			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
-					raw_data[2], raw_data[1]);
-			hid_debug_event(hdev, buff);
-			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
-			hid_debug_event(hdev, buff);
-			if (raw_data[3] == 0) {
-				snprintf(buff, BUFF_SZ, "\tNo data\n");
-			} else if (raw_data[3] + 4 <= raw_size) {
-				snprintf(buff, BUFF_SZ, "\tData: ");
-				hid_debug_event(hdev, buff);
-				dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
-			} else {
-				snprintf(buff, BUFF_SZ, "\tData overflowed\n");
-			}
-			break;
-		case 3:
-			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
-					raw_data[3], raw_data[2], raw_data[1]);
-			hid_debug_event(hdev, buff);
-			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
-			hid_debug_event(hdev, buff);
-			if (raw_data[4] == 0) {
-				snprintf(buff, BUFF_SZ, "\tNo data\n");
-			} else if (raw_data[4] + 5 <= raw_size) {
-				snprintf(buff, BUFF_SZ, "\tData: ");
-				hid_debug_event(hdev, buff);
-				dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]);
-			} else {
-				snprintf(buff, BUFF_SZ, "\tData overflowed\n");
-			}
-			break;
-		default:
-			snprintf(buff, BUFF_SZ, "\tNot supported\n");
-		}
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_SPLASH_RESTART:
-		/* TODO */
-		break;
-	case REPORT_EXIT_KEYBOARD:
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_EXIT_KEYBOARD", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n",
-				raw_data[1] | (raw_data[2] << 8),
-				raw_data[2], raw_data[1]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_VERSION:
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_VERSION", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_DEVID:
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_DEVID", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_SPLASH_SIZE:
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_SPLASH_SIZE", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_HOOK_VERSION:
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_HOOK_VERSION", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_EXIT_FLASHER:
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"REPORT_VERSION", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n",
-				raw_data[1] | (raw_data[2] << 8),
-				raw_data[2], raw_data[1]);
-		hid_debug_event(hdev, buff);
-		break;
-	default:
-		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
-			"<unknown>", report->id, raw_size-1);
-		hid_debug_event(hdev, buff);
-		break;
-	}
-	wake_up_interruptible(&hdev->debug_wait);
-	kfree(buff);
-}
-
-static void picolcd_debug_raw_event(struct picolcd_data *data,
-		struct hid_device *hdev, struct hid_report *report,
-		u8 *raw_data, int size)
-{
-	char *buff;
-
-#define BUFF_SZ 256
-	/* Avoid unnecessary overhead if debugfs is disabled */
-	if (!hdev->debug_events)
-		return;
-
-	buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
-	if (!buff)
-		return;
-
-	switch (report->id) {
-	case REPORT_ERROR_CODE:
-		/* 2 data bytes with affected report and error code */
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_ERROR_CODE", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		if (raw_data[2] < ARRAY_SIZE(error_codes))
-			snprintf(buff, BUFF_SZ, "\tError code 0x%02x (%s) in reply to report 0x%02x\n",
-					raw_data[2], error_codes[raw_data[2]], raw_data[1]);
-		else
-			snprintf(buff, BUFF_SZ, "\tError code 0x%02x in reply to report 0x%02x\n",
-					raw_data[2], raw_data[1]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_KEY_STATE:
-		/* 2 data bytes with key state */
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_KEY_STATE", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		if (raw_data[1] == 0)
-			snprintf(buff, BUFF_SZ, "\tNo key pressed\n");
-		else if (raw_data[2] == 0)
-			snprintf(buff, BUFF_SZ, "\tOne key pressed: 0x%02x (%d)\n",
-					raw_data[1], raw_data[1]);
-		else
-			snprintf(buff, BUFF_SZ, "\tTwo keys pressed: 0x%02x (%d), 0x%02x (%d)\n",
-					raw_data[1], raw_data[1], raw_data[2], raw_data[2]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_IR_DATA:
-		/* Up to 20 byes of IR scancode data */
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_IR_DATA", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		if (raw_data[1] == 0) {
-			snprintf(buff, BUFF_SZ, "\tUnexpectedly 0 data length\n");
-			hid_debug_event(hdev, buff);
-		} else if (raw_data[1] + 1 <= size) {
-			snprintf(buff, BUFF_SZ, "\tData length: %d\n\tIR Data: ",
-					raw_data[1]-1);
-			hid_debug_event(hdev, buff);
-			dump_buff_as_hex(buff, BUFF_SZ, raw_data+2, raw_data[1]-1);
-			hid_debug_event(hdev, buff);
-		} else {
-			snprintf(buff, BUFF_SZ, "\tOverflowing data length: %d\n",
-					raw_data[1]-1);
-			hid_debug_event(hdev, buff);
-		}
-		break;
-	case REPORT_EE_DATA:
-		/* Data buffer in response to REPORT_EE_READ or REPORT_EE_WRITE */
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_EE_DATA", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
-				raw_data[2], raw_data[1]);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
-		hid_debug_event(hdev, buff);
-		if (raw_data[3] == 0) {
-			snprintf(buff, BUFF_SZ, "\tNo data\n");
-			hid_debug_event(hdev, buff);
-		} else if (raw_data[3] + 4 <= size) {
-			snprintf(buff, BUFF_SZ, "\tData: ");
-			hid_debug_event(hdev, buff);
-			dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
-			hid_debug_event(hdev, buff);
-		} else {
-			snprintf(buff, BUFF_SZ, "\tData overflowed\n");
-			hid_debug_event(hdev, buff);
-		}
-		break;
-	case REPORT_MEMORY:
-		/* Data buffer in response to REPORT_READ_MEMORY or REPORT_WRTIE_MEMORY */
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_MEMORY", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		switch (data->addr_sz) {
-		case 2:
-			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
-					raw_data[2], raw_data[1]);
-			hid_debug_event(hdev, buff);
-			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
-			hid_debug_event(hdev, buff);
-			if (raw_data[3] == 0) {
-				snprintf(buff, BUFF_SZ, "\tNo data\n");
-			} else if (raw_data[3] + 4 <= size) {
-				snprintf(buff, BUFF_SZ, "\tData: ");
-				hid_debug_event(hdev, buff);
-				dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
-			} else {
-				snprintf(buff, BUFF_SZ, "\tData overflowed\n");
-			}
-			break;
-		case 3:
-			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
-					raw_data[3], raw_data[2], raw_data[1]);
-			hid_debug_event(hdev, buff);
-			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
-			hid_debug_event(hdev, buff);
-			if (raw_data[4] == 0) {
-				snprintf(buff, BUFF_SZ, "\tNo data\n");
-			} else if (raw_data[4] + 5 <= size) {
-				snprintf(buff, BUFF_SZ, "\tData: ");
-				hid_debug_event(hdev, buff);
-				dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]);
-			} else {
-				snprintf(buff, BUFF_SZ, "\tData overflowed\n");
-			}
-			break;
-		default:
-			snprintf(buff, BUFF_SZ, "\tNot supported\n");
-		}
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_VERSION:
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_VERSION", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n",
-				raw_data[2], raw_data[1]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_BL_ERASE_MEMORY:
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_BL_ERASE_MEMORY", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		/* TODO */
-		break;
-	case REPORT_BL_READ_MEMORY:
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_BL_READ_MEMORY", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		/* TODO */
-		break;
-	case REPORT_BL_WRITE_MEMORY:
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_BL_WRITE_MEMORY", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		/* TODO */
-		break;
-	case REPORT_DEVID:
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_DEVID", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tSerial: 0x%02x%02x%02x%02x\n",
-				raw_data[1], raw_data[2], raw_data[3], raw_data[4]);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tType: 0x%02x\n",
-				raw_data[5]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_SPLASH_SIZE:
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_SPLASH_SIZE", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tTotal splash space: %d\n",
-				(raw_data[2] << 8) | raw_data[1]);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tUsed splash space: %d\n",
-				(raw_data[4] << 8) | raw_data[3]);
-		hid_debug_event(hdev, buff);
-		break;
-	case REPORT_HOOK_VERSION:
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"REPORT_HOOK_VERSION", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n",
-				raw_data[1], raw_data[2]);
-		hid_debug_event(hdev, buff);
-		break;
-	default:
-		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
-			"<unknown>", report->id, size-1);
-		hid_debug_event(hdev, buff);
-		break;
-	}
-	wake_up_interruptible(&hdev->debug_wait);
-	kfree(buff);
-}
-
-static void picolcd_init_devfs(struct picolcd_data *data,
-		struct hid_report *eeprom_r, struct hid_report *eeprom_w,
-		struct hid_report *flash_r, struct hid_report *flash_w,
-		struct hid_report *reset)
-{
-	struct hid_device *hdev = data->hdev;
-
-	mutex_init(&data->mutex_flash);
-
-	/* reset */
-	if (reset)
-		data->debug_reset = debugfs_create_file("reset", 0600,
-				hdev->debug_dir, data, &picolcd_debug_reset_fops);
-
-	/* eeprom */
-	if (eeprom_r || eeprom_w)
-		data->debug_eeprom = debugfs_create_file("eeprom",
-			(eeprom_w ? S_IWUSR : 0) | (eeprom_r ? S_IRUSR : 0),
-			hdev->debug_dir, data, &picolcd_debug_eeprom_fops);
-
-	/* flash */
-	if (flash_r && flash_r->maxfield == 1 && flash_r->field[0]->report_size == 8)
-		data->addr_sz = flash_r->field[0]->report_count - 1;
-	else
-		data->addr_sz = -1;
-	if (data->addr_sz == 2 || data->addr_sz == 3) {
-		data->debug_flash = debugfs_create_file("flash",
-			(flash_w ? S_IWUSR : 0) | (flash_r ? S_IRUSR : 0),
-			hdev->debug_dir, data, &picolcd_debug_flash_fops);
-	} else if (flash_r || flash_w)
-		hid_warn(hdev, "Unexpected FLASH access reports, please submit rdesc for review\n");
-}
-
-static void picolcd_exit_devfs(struct picolcd_data *data)
-{
-	struct dentry *dent;
-
-	dent = data->debug_reset;
-	data->debug_reset = NULL;
-	if (dent)
-		debugfs_remove(dent);
-	dent = data->debug_eeprom;
-	data->debug_eeprom = NULL;
-	if (dent)
-		debugfs_remove(dent);
-	dent = data->debug_flash;
-	data->debug_flash = NULL;
-	if (dent)
-		debugfs_remove(dent);
-	mutex_destroy(&data->mutex_flash);
-}
-#else
-static inline void picolcd_debug_raw_event(struct picolcd_data *data,
-		struct hid_device *hdev, struct hid_report *report,
-		u8 *raw_data, int size)
-{
-}
-static inline void picolcd_init_devfs(struct picolcd_data *data,
-		struct hid_report *eeprom_r, struct hid_report *eeprom_w,
-		struct hid_report *flash_r, struct hid_report *flash_w,
-		struct hid_report *reset)
-{
-}
-static inline void picolcd_exit_devfs(struct picolcd_data *data)
-{
-}
-#endif /* CONFIG_DEBUG_FS */
-
-/*
- * 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);
-	unsigned long flags;
-	int ret = 0;
-
-	if (!data)
-		return 1;
-
-	if (report->id == REPORT_KEY_STATE) {
-		if (data->input_keys)
-			ret = picolcd_raw_keypad(data, report, raw_data+1, size-1);
-	} else if (report->id == REPORT_IR_DATA) {
-		if (data->input_cir)
-			ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
-	} else {
-		spin_lock_irqsave(&data->lock, flags);
-		/*
-		 * We let the caller of picolcd_send_and_wait() check if the
-		 * report we got is one of the expected ones or not.
-		 */
-		if (data->pending) {
-			memcpy(data->pending->raw_data, raw_data+1, size-1);
-			data->pending->raw_size  = size-1;
-			data->pending->in_report = report;
-			complete(&data->pending->ready);
-		}
-		spin_unlock_irqrestore(&data->lock, flags);
-	}
-
-	picolcd_debug_raw_event(data, hdev, report, raw_data, size);
-	return 1;
-}
-
-#ifdef CONFIG_PM
-static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)
-{
-	if (PMSG_IS_AUTO(message))
-		return 0;
-
-	picolcd_suspend_backlight(hid_get_drvdata(hdev));
-	dbg_hid(PICOLCD_NAME " device ready for suspend\n");
-	return 0;
-}
-
-static int picolcd_resume(struct hid_device *hdev)
-{
-	int ret;
-	ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
-	if (ret)
-		dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
-	return 0;
-}
-
-static int picolcd_reset_resume(struct hid_device *hdev)
-{
-	int ret;
-	ret = picolcd_reset(hdev);
-	if (ret)
-		dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);
-	ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);
-	if (ret)
-		dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);
-	ret = picolcd_resume_lcd(hid_get_drvdata(hdev));
-	if (ret)
-		dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);
-	ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
-	if (ret)
-		dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
-	picolcd_leds_set(hid_get_drvdata(hdev));
-	return 0;
-}
-#endif
-
-/* initialize keypad input device */
-static int picolcd_init_keys(struct picolcd_data *data,
-		struct hid_report *report)
-{
-	struct hid_device *hdev = data->hdev;
-	struct input_dev *idev;
-	int error, i;
-
-	if (!report)
-		return -ENODEV;
-	if (report->maxfield != 1 || report->field[0]->report_count != 2 ||
-			report->field[0]->report_size != 8) {
-		hid_err(hdev, "unsupported KEY_STATE report\n");
-		return -EINVAL;
-	}
-
-	idev = input_allocate_device();
-	if (idev == NULL) {
-		hid_err(hdev, "failed to allocate input device\n");
-		return -ENOMEM;
-	}
-	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(data->keycode[0]);
-	input_set_capability(idev, EV_MSC, MSC_SCAN);
-	set_bit(EV_REP, idev->evbit);
-	for (i = 0; i < PICOLCD_KEYS; i++)
-		input_set_capability(idev, EV_KEY, data->keycode[i]);
-	error = input_register_device(idev);
-	if (error) {
-		hid_err(hdev, "error registering the input device\n");
-		input_free_device(idev);
-		return error;
-	}
-	data->input_keys = idev;
-	return 0;
-}
-
-static void picolcd_exit_keys(struct picolcd_data *data)
-{
-	struct input_dev *idev = data->input_keys;
-
-	data->input_keys = NULL;
-	if (idev)
-		input_unregister_device(idev);
-}
-
-/* initialize CIR input device */
-static inline int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
-{
-	/* support not implemented yet */
-	return 0;
-}
-
-static inline void picolcd_exit_cir(struct picolcd_data *data)
-{
-}
-
-static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
-{
-	int error;
-
-	error = picolcd_check_version(hdev);
-	if (error)
-		return error;
-
-	if (data->version[0] != 0 && data->version[1] != 3)
-		hid_info(hdev, "Device with untested firmware revision, please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
-			 dev_name(&hdev->dev));
-
-	/* Setup keypad input device */
-	error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev));
-	if (error)
-		goto err;
-
-	/* Setup CIR input device */
-	error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev));
-	if (error)
-		goto err;
-
-	/* Set up the framebuffer device */
-	error = picolcd_init_framebuffer(data);
-	if (error)
-		goto err;
-
-	/* Setup lcd class device */
-	error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev));
-	if (error)
-		goto err;
-
-	/* Setup backlight class device */
-	error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev));
-	if (error)
-		goto err;
-
-	/* Setup the LED class devices */
-	error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev));
-	if (error)
-		goto err;
-
-	picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev),
-			picolcd_out_report(REPORT_EE_WRITE, hdev),
-			picolcd_out_report(REPORT_READ_MEMORY, hdev),
-			picolcd_out_report(REPORT_WRITE_MEMORY, hdev),
-			picolcd_out_report(REPORT_RESET, hdev));
-	return 0;
-err:
-	picolcd_exit_leds(data);
-	picolcd_exit_backlight(data);
-	picolcd_exit_lcd(data);
-	picolcd_exit_framebuffer(data);
-	picolcd_exit_cir(data);
-	picolcd_exit_keys(data);
-	return error;
-}
-
-static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data)
-{
-	int error;
-
-	error = picolcd_check_version(hdev);
-	if (error)
-		return error;
-
-	if (data->version[0] != 1 && data->version[1] != 0)
-		hid_info(hdev, "Device with untested bootloader revision, please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
-			 dev_name(&hdev->dev));
-
-	picolcd_init_devfs(data, NULL, NULL,
-			picolcd_out_report(REPORT_BL_READ_MEMORY, hdev),
-			picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL);
-	return 0;
-}
-
-static int picolcd_probe(struct hid_device *hdev,
-		     const struct hid_device_id *id)
-{
-	struct picolcd_data *data;
-	int error = -ENOMEM;
-
-	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) {
-		hid_err(hdev, "can't allocate space for Minibox PicoLCD device data\n");
-		error = -ENOMEM;
-		goto err_no_cleanup;
-	}
-
-	spin_lock_init(&data->lock);
-	mutex_init(&data->mutex);
-	data->hdev = hdev;
-	data->opmode_delay = 5000;
-	if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
-		data->status |= PICOLCD_BOOTLOADER;
-	hid_set_drvdata(hdev, data);
-
-	/* Parse the device reports and start it up */
-	error = hid_parse(hdev);
-	if (error) {
-		hid_err(hdev, "device report parse failed\n");
-		goto err_cleanup_data;
-	}
-
-	error = hid_hw_start(hdev, 0);
-	if (error) {
-		hid_err(hdev, "hardware start failed\n");
-		goto err_cleanup_data;
-	}
-
-	error = hid_hw_open(hdev);
-	if (error) {
-		hid_err(hdev, "failed to open input interrupt pipe for key and IR events\n");
-		goto err_cleanup_hid_hw;
-	}
-
-	error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay);
-	if (error) {
-		hid_err(hdev, "failed to create sysfs attributes\n");
-		goto err_cleanup_hid_ll;
-	}
-
-	error = device_create_file(&hdev->dev, &dev_attr_operation_mode);
-	if (error) {
-		hid_err(hdev, "failed to create sysfs attributes\n");
-		goto err_cleanup_sysfs1;
-	}
-
-	if (data->status & PICOLCD_BOOTLOADER)
-		error = picolcd_probe_bootloader(hdev, data);
-	else
-		error = picolcd_probe_lcd(hdev, data);
-	if (error)
-		goto err_cleanup_sysfs2;
-
-	dbg_hid(PICOLCD_NAME " activated and initialized\n");
-	return 0;
-
-err_cleanup_sysfs2:
-	device_remove_file(&hdev->dev, &dev_attr_operation_mode);
-err_cleanup_sysfs1:
-	device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
-err_cleanup_hid_ll:
-	hid_hw_close(hdev);
-err_cleanup_hid_hw:
-	hid_hw_stop(hdev);
-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);
-	unsigned long flags;
-
-	dbg_hid(PICOLCD_NAME " hardware remove...\n");
-	spin_lock_irqsave(&data->lock, flags);
-	data->status |= PICOLCD_FAILED;
-	spin_unlock_irqrestore(&data->lock, flags);
-#ifdef CONFIG_HID_PICOLCD_FB
-	/* short-circuit FB as early as possible in order to
-	 * avoid long delays if we host console.
-	 */
-	if (data->fb_info)
-		data->fb_info->par = NULL;
-#endif
-
-	picolcd_exit_devfs(data);
-	device_remove_file(&hdev->dev, &dev_attr_operation_mode);
-	device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
-	hid_hw_close(hdev);
-	hid_hw_stop(hdev);
-	hid_set_drvdata(hdev, NULL);
-
-	/* Shortcut potential pending reply that will never arrive */
-	spin_lock_irqsave(&data->lock, flags);
-	if (data->pending)
-		complete(&data->pending->ready);
-	spin_unlock_irqrestore(&data->lock, flags);
-
-	/* Cleanup LED */
-	picolcd_exit_leds(data);
-	/* Clean up the framebuffer */
-	picolcd_exit_backlight(data);
-	picolcd_exit_lcd(data);
-	picolcd_exit_framebuffer(data);
-	/* Cleanup input */
-	picolcd_exit_cir(data);
-	picolcd_exit_keys(data);
-
-	mutex_destroy(&data->mutex);
-	/* 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) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
-	{ }
-};
-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,
-#ifdef CONFIG_PM
-	.suspend =       picolcd_suspend,
-	.resume =        picolcd_resume,
-	.reset_resume =  picolcd_reset_resume,
-#endif
-};
-
-static int __init picolcd_init(void)
-{
-	return hid_register_driver(&picolcd_driver);
-}
-
-static void __exit picolcd_exit(void)
-{
-	hid_unregister_driver(&picolcd_driver);
-#ifdef CONFIG_HID_PICOLCD_FB
-	flush_work_sync(&picolcd_fb_cleanup);
-	WARN_ON(fb_pending);
-#endif
-}
-
-module_init(picolcd_init);
-module_exit(picolcd_exit);
-MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/hid/hid-picolcd.h b/drivers/hid/hid-picolcd.h
new file mode 100644
index 00000000000..4ddb3188d5c
--- /dev/null
+++ b/drivers/hid/hid-picolcd.h
@@ -0,0 +1,306 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2012 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, 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/>.  *
+ ***************************************************************************/
+
+#define PICOLCD_NAME "PicoLCD (graphic)"
+
+/* Report numbers */
+#define REPORT_ERROR_CODE      0x10 /* LCD: IN[16]  */
+#define   ERR_SUCCESS            0x00
+#define   ERR_PARAMETER_MISSING  0x01
+#define   ERR_DATA_MISSING       0x02
+#define   ERR_BLOCK_READ_ONLY    0x03
+#define   ERR_BLOCK_NOT_ERASABLE 0x04
+#define   ERR_BLOCK_TOO_BIG      0x05
+#define   ERR_SECTION_OVERFLOW   0x06
+#define   ERR_INVALID_CMD_LEN    0x07
+#define   ERR_INVALID_DATA_LEN   0x08
+#define REPORT_KEY_STATE       0x11 /* LCD: IN[2]   */
+#define REPORT_IR_DATA         0x21 /* LCD: IN[63]  */
+#define REPORT_EE_DATA         0x32 /* LCD: IN[63]  */
+#define REPORT_MEMORY          0x41 /* LCD: IN[63]  */
+#define REPORT_LED_STATE       0x81 /* LCD: OUT[1]  */
+#define REPORT_BRIGHTNESS      0x91 /* LCD: OUT[1]  */
+#define REPORT_CONTRAST        0x92 /* LCD: OUT[1]  */
+#define REPORT_RESET           0x93 /* LCD: OUT[2]  */
+#define REPORT_LCD_CMD         0x94 /* LCD: OUT[63] */
+#define REPORT_LCD_DATA        0x95 /* LCD: OUT[63] */
+#define REPORT_LCD_CMD_DATA    0x96 /* LCD: OUT[63] */
+#define	REPORT_EE_READ         0xa3 /* LCD: OUT[63] */
+#define REPORT_EE_WRITE        0xa4 /* LCD: OUT[63] */
+#define REPORT_ERASE_MEMORY    0xb2 /* LCD: OUT[2]  */
+#define REPORT_READ_MEMORY     0xb3 /* LCD: OUT[3]  */
+#define REPORT_WRITE_MEMORY    0xb4 /* LCD: OUT[63] */
+#define REPORT_SPLASH_RESTART  0xc1 /* LCD: OUT[1]  */
+#define REPORT_EXIT_KEYBOARD   0xef /* LCD: OUT[2]  */
+#define REPORT_VERSION         0xf1 /* LCD: IN[2],OUT[1]    Bootloader: IN[2],OUT[1]   */
+#define REPORT_BL_ERASE_MEMORY 0xf2 /*                      Bootloader: IN[36],OUT[4]  */
+#define REPORT_BL_READ_MEMORY  0xf3 /*                      Bootloader: IN[36],OUT[4]  */
+#define REPORT_BL_WRITE_MEMORY 0xf4 /*                      Bootloader: IN[36],OUT[36] */
+#define REPORT_DEVID           0xf5 /* LCD: IN[5], OUT[1]   Bootloader: IN[5],OUT[1]   */
+#define REPORT_SPLASH_SIZE     0xf6 /* LCD: IN[4], OUT[1]   */
+#define REPORT_HOOK_VERSION    0xf7 /* LCD: IN[2], OUT[1]   */
+#define REPORT_EXIT_FLASHER    0xff /*                      Bootloader: OUT[2]         */
+
+/* Description of in-progress IO operation, used for operations
+ * that trigger response from device */
+struct picolcd_pending {
+	struct hid_report *out_report;
+	struct hid_report *in_report;
+	struct completion ready;
+	int raw_size;
+	u8 raw_data[64];
+};
+
+
+#define PICOLCD_KEYS 17
+
+/* Per device data structure */
+struct picolcd_data {
+	struct hid_device *hdev;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debug_reset;
+	struct dentry *debug_eeprom;
+	struct dentry *debug_flash;
+	struct mutex mutex_flash;
+	int addr_sz;
+#endif
+	u8 version[2];
+	unsigned short opmode_delay;
+	/* input stuff */
+	u8 pressed_keys[2];
+	struct input_dev *input_keys;
+	struct input_dev *input_cir;
+	unsigned short keycode[PICOLCD_KEYS];
+
+#ifdef CONFIG_HID_PICOLCD_FB
+	/* Framebuffer stuff */
+	u8 fb_update_rate;
+	u8 fb_bpp;
+	u8 fb_force;
+	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;
+#endif /* CONFIG_HID_PICOLCD_FB */
+#ifdef CONFIG_HID_PICOLCD_LCD
+	struct lcd_device *lcd;
+	u8 lcd_contrast;
+#endif /* CONFIG_HID_PICOLCD_LCD */
+#ifdef CONFIG_HID_PICOLCD_BACKLIGHT
+	struct backlight_device *backlight;
+	u8 lcd_brightness;
+	u8 lcd_power;
+#endif /* CONFIG_HID_PICOLCD_BACKLIGHT */
+#ifdef CONFIG_HID_PICOLCD_LEDS
+	/* LED stuff */
+	u8 led_state;
+	struct led_classdev *led[8];
+#endif /* CONFIG_HID_PICOLCD_LEDS */
+
+	/* Housekeeping stuff */
+	spinlock_t lock;
+	struct mutex mutex;
+	struct picolcd_pending *pending;
+	int status;
+#define PICOLCD_BOOTLOADER 1
+#define PICOLCD_FAILED 2
+#define PICOLCD_READY_FB 4
+};
+
+
+/* Find a given report */
+#define picolcd_in_report(id, dev) picolcd_report(id, dev, HID_INPUT_REPORT)
+#define picolcd_out_report(id, dev) picolcd_report(id, dev, HID_OUTPUT_REPORT)
+
+struct hid_report *picolcd_report(int id, struct hid_device *hdev, int dir);
+
+#ifdef CONFIG_DEBUG_FS
+void picolcd_debug_out_report(struct picolcd_data *data,
+		struct hid_device *hdev, struct hid_report *report);
+#define usbhid_submit_report(a, b, c) \
+	do { \
+		picolcd_debug_out_report(hid_get_drvdata(a), a, b); \
+		usbhid_submit_report(a, b, c); \
+	} while (0)
+
+void picolcd_debug_raw_event(struct picolcd_data *data,
+		struct hid_device *hdev, struct hid_report *report,
+		u8 *raw_data, int size);
+
+void picolcd_init_devfs(struct picolcd_data *data,
+		struct hid_report *eeprom_r, struct hid_report *eeprom_w,
+		struct hid_report *flash_r, struct hid_report *flash_w,
+		struct hid_report *reset);
+
+void picolcd_exit_devfs(struct picolcd_data *data);
+#else
+static inline void picolcd_debug_raw_event(struct picolcd_data *data,
+		struct hid_device *hdev, struct hid_report *report,
+		u8 *raw_data, int size)
+{
+}
+static inline void picolcd_init_devfs(struct picolcd_data *data,
+		struct hid_report *eeprom_r, struct hid_report *eeprom_w,
+		struct hid_report *flash_r, struct hid_report *flash_w,
+		struct hid_report *reset)
+{
+}
+static inline void picolcd_exit_devfs(struct picolcd_data *data)
+{
+}
+static inline void picolcd_debug_raw_event(struct picolcd_data *data,
+		struct hid_device *hdev, struct hid_report *report,
+		u8 *raw_data, int size)
+{
+}
+#endif /* CONFIG_DEBUG_FS */
+
+
+#ifdef CONFIG_HID_PICOLCD_FB
+int picolcd_fb_reset(struct picolcd_data *data, int clear);
+
+int picolcd_init_framebuffer(struct picolcd_data *data);
+
+void picolcd_exit_framebuffer(struct picolcd_data *data);
+
+void picolcd_fb_unload(void);
+
+void picolcd_fb_refresh(struct picolcd_data *data);
+#define picolcd_fbinfo(d) ((d)->fb_info)
+#else
+static inline int picolcd_fb_reset(struct picolcd_data *data, int clear)
+{
+	return 0;
+}
+static inline int picolcd_init_framebuffer(struct picolcd_data *data)
+{
+	return 0;
+}
+static inline void picolcd_exit_framebuffer(struct picolcd_data *data)
+{
+}
+static inline void picolcd_fb_unload(void)
+{
+}
+static inline void picolcd_fb_refresh(struct picolcd_data *data)
+{
+}
+#define picolcd_fbinfo(d) NULL
+#endif /* CONFIG_HID_PICOLCD_FB */
+
+
+#ifdef CONFIG_HID_PICOLCD_BACKLIGHT
+int picolcd_init_backlight(struct picolcd_data *data,
+		struct hid_report *report);
+
+void picolcd_exit_backlight(struct picolcd_data *data);
+
+int picolcd_resume_backlight(struct picolcd_data *data);
+
+void picolcd_suspend_backlight(struct picolcd_data *data);
+#else
+static inline int picolcd_init_backlight(struct picolcd_data *data,
+		struct hid_report *report)
+{
+	return 0;
+}
+static inline void picolcd_exit_backlight(struct picolcd_data *data)
+{
+}
+static inline int picolcd_resume_backlight(struct picolcd_data *data)
+{
+	return 0;
+}
+static inline void picolcd_suspend_backlight(struct picolcd_data *data)
+{
+}
+
+#endif /* CONFIG_HID_PICOLCD_BACKLIGHT */
+
+
+#ifdef CONFIG_HID_PICOLCD_LCD
+int picolcd_init_lcd(struct picolcd_data *data,
+		struct hid_report *report);
+
+void picolcd_exit_lcd(struct picolcd_data *data);
+
+int picolcd_resume_lcd(struct picolcd_data *data);
+#else
+static inline int picolcd_init_lcd(struct picolcd_data *data,
+		struct hid_report *report)
+{
+	return 0;
+}
+static inline void picolcd_exit_lcd(struct picolcd_data *data)
+{
+}
+static inline int picolcd_resume_lcd(struct picolcd_data *data)
+{
+	return 0;
+}
+#endif /* CONFIG_HID_PICOLCD_LCD */
+
+
+#ifdef CONFIG_HID_PICOLCD_LEDS
+int picolcd_init_leds(struct picolcd_data *data,
+		struct hid_report *report);
+
+void picolcd_exit_leds(struct picolcd_data *data);
+
+void picolcd_leds_set(struct picolcd_data *data);
+#else
+static inline int picolcd_init_leds(struct picolcd_data *data,
+		struct hid_report *report)
+{
+	return 0;
+}
+static inline void picolcd_exit_leds(struct picolcd_data *data)
+{
+}
+static inline void picolcd_leds_set(struct picolcd_data *data)
+{
+}
+#endif /* CONFIG_HID_PICOLCD_LEDS */
+
+
+#ifdef CONFIG_HID_PICOLCD_CIR
+int picolcd_raw_cir(struct picolcd_data *data,
+		struct hid_report *report, u8 *raw_data, int size);
+
+int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report);
+
+void picolcd_exit_cir(struct picolcd_data *data);
+#else
+static inline int picolcd_raw_cir(struct picolcd_data *data,
+		struct hid_report *report, u8 *raw_data, int size)
+{
+	return 1;
+}
+static inline int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
+{
+	return 0;
+}
+static inline void picolcd_exit_cir(struct picolcd_data *data)
+{
+}
+#endif /* CONFIG_HID_PICOLCD_LIRC */
+
+int picolcd_reset(struct hid_device *hdev);
+struct picolcd_pending *picolcd_send_and_wait(struct hid_device *hdev,
+			int report_id, const u8 *raw_data, int size);
diff --git a/drivers/hid/hid-picolcd_backlight.c b/drivers/hid/hid-picolcd_backlight.c
new file mode 100644
index 00000000000..cd1ccd7205c
--- /dev/null
+++ b/drivers/hid/hid-picolcd_backlight.c
@@ -0,0 +1,121 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2012 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, 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 "usbhid/usbhid.h"
+#include <linux/usb.h>
+
+#include <linux/fb.h>
+#include <linux/backlight.h>
+
+#include "hid-picolcd.h"
+
+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);
+	unsigned long flags;
+
+	if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
+		return -ENODEV;
+
+	data->lcd_brightness = bdev->props.brightness & 0x0ff;
+	data->lcd_power      = bdev->props.power;
+	spin_lock_irqsave(&data->lock, flags);
+	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);
+	spin_unlock_irqrestore(&data->lock, flags);
+	return 0;
+}
+
+static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb)
+{
+	return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev));
+}
+
+static const struct backlight_ops picolcd_blops = {
+	.update_status  = picolcd_set_brightness,
+	.get_brightness = picolcd_get_brightness,
+	.check_fb       = picolcd_check_bl_fb,
+};
+
+int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report)
+{
+	struct device *dev = &data->hdev->dev;
+	struct backlight_device *bdev;
+	struct backlight_properties props;
+	if (!report)
+		return -ENODEV;
+	if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
+			report->field[0]->report_size != 8) {
+		dev_err(dev, "unsupported BRIGHTNESS report");
+		return -EINVAL;
+	}
+
+	memset(&props, 0, sizeof(props));
+	props.type = BACKLIGHT_RAW;
+	props.max_brightness = 0xff;
+	bdev = backlight_device_register(dev_name(dev), dev, data,
+			&picolcd_blops, &props);
+	if (IS_ERR(bdev)) {
+		dev_err(dev, "failed to register backlight\n");
+		return PTR_ERR(bdev);
+	}
+	bdev->props.brightness     = 0xff;
+	data->lcd_brightness       = 0xff;
+	data->backlight            = bdev;
+	picolcd_set_brightness(bdev);
+	return 0;
+}
+
+void picolcd_exit_backlight(struct picolcd_data *data)
+{
+	struct backlight_device *bdev = data->backlight;
+
+	data->backlight = NULL;
+	if (bdev)
+		backlight_device_unregister(bdev);
+}
+
+int picolcd_resume_backlight(struct picolcd_data *data)
+{
+	if (!data->backlight)
+		return 0;
+	return picolcd_set_brightness(data->backlight);
+}
+
+#ifdef CONFIG_PM
+void picolcd_suspend_backlight(struct picolcd_data *data)
+{
+	int bl_power = data->lcd_power;
+	if (!data->backlight)
+		return;
+
+	data->backlight->props.power = FB_BLANK_POWERDOWN;
+	picolcd_set_brightness(data->backlight);
+	data->lcd_power = data->backlight->props.power = bl_power;
+}
+#endif /* CONFIG_PM */
+
diff --git a/drivers/hid/hid-picolcd_cir.c b/drivers/hid/hid-picolcd_cir.c
new file mode 100644
index 00000000000..dc632c3cab3
--- /dev/null
+++ b/drivers/hid/hid-picolcd_cir.c
@@ -0,0 +1,61 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2012 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, 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/hid-debug.h>
+#include <linux/input.h>
+#include "hid-ids.h"
+#include "usbhid/usbhid.h"
+#include <linux/usb.h>
+
+#include <linux/fb.h>
+#include <linux/vmalloc.h>
+#include <linux/backlight.h>
+#include <linux/lcd.h>
+
+#include <linux/leds.h>
+
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+
+#include <linux/completion.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+
+#include "hid-picolcd.h"
+
+
+int picolcd_raw_cir(struct picolcd_data *data,
+		struct hid_report *report, u8 *raw_data, int size)
+{
+	/* Need understanding of CIR data format to implement ... */
+	return 1;
+}
+
+/* initialize CIR input device */
+int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
+{
+	/* support not implemented yet */
+	return 0;
+}
+
+void picolcd_exit_cir(struct picolcd_data *data)
+{
+}
+
diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
new file mode 100644
index 00000000000..36e7548a6e1
--- /dev/null
+++ b/drivers/hid/hid-picolcd_core.c
@@ -0,0 +1,704 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2012 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, 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/hid-debug.h>
+#include <linux/input.h>
+#include "hid-ids.h"
+#include "usbhid/usbhid.h"
+#include <linux/usb.h>
+
+#include <linux/fb.h>
+#include <linux/vmalloc.h>
+
+#include <linux/completion.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+
+#include "hid-picolcd.h"
+
+
+/* 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.
+ */
+static const unsigned short def_keymap[PICOLCD_KEYS] = {
+	KEY_RESERVED,	/* none */
+	KEY_BACK,	/* col 4 + row 1 */
+	KEY_HOMEPAGE,	/* col 3 + row 1 */
+	KEY_RESERVED,	/* col 2 + row 1 */
+	KEY_RESERVED,	/* col 1 + row 1 */
+	KEY_SCROLLUP,	/* col 4 + row 2 */
+	KEY_OK,		/* col 3 + row 2 */
+	KEY_SCROLLDOWN,	/* col 2 + row 2 */
+	KEY_RESERVED,	/* col 1 + row 2 */
+	KEY_RESERVED,	/* col 4 + row 3 */
+	KEY_RESERVED,	/* col 3 + row 3 */
+	KEY_RESERVED,	/* col 2 + row 3 */
+	KEY_RESERVED,	/* col 1 + row 3 */
+	KEY_RESERVED,	/* col 4 + row 4 */
+	KEY_RESERVED,	/* col 3 + row 4 */
+	KEY_RESERVED,	/* col 2 + row 4 */
+	KEY_RESERVED,	/* col 1 + row 4 */
+};
+
+
+/* Find a given report */
+struct hid_report *picolcd_report(int id, struct hid_device *hdev, int dir)
+{
+	struct list_head *feature_report_list = &hdev->report_enum[dir].report_list;
+	struct hid_report *report = NULL;
+
+	list_for_each_entry(report, feature_report_list, list) {
+		if (report->id == id)
+			return report;
+	}
+	hid_warn(hdev, "No report with id 0x%x found\n", id);
+	return NULL;
+}
+
+/* Submit a report and wait for a reply from device - if device fades away
+ * or does not respond in time, return NULL */
+struct picolcd_pending *picolcd_send_and_wait(struct hid_device *hdev,
+		int report_id, const u8 *raw_data, int size)
+{
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+	struct picolcd_pending *work;
+	struct hid_report *report = picolcd_out_report(report_id, hdev);
+	unsigned long flags;
+	int i, j, k;
+
+	if (!report || !data)
+		return NULL;
+	if (data->status & PICOLCD_FAILED)
+		return NULL;
+	work = kzalloc(sizeof(*work), GFP_KERNEL);
+	if (!work)
+		return NULL;
+
+	init_completion(&work->ready);
+	work->out_report = report;
+	work->in_report  = NULL;
+	work->raw_size   = 0;
+
+	mutex_lock(&data->mutex);
+	spin_lock_irqsave(&data->lock, flags);
+	for (i = k = 0; i < report->maxfield; i++)
+		for (j = 0; j < report->field[i]->report_count; j++) {
+			hid_set_field(report->field[i], j, k < size ? raw_data[k] : 0);
+			k++;
+		}
+	data->pending = work;
+	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
+	spin_unlock_irqrestore(&data->lock, flags);
+	wait_for_completion_interruptible_timeout(&work->ready, HZ*2);
+	spin_lock_irqsave(&data->lock, flags);
+	data->pending = NULL;
+	spin_unlock_irqrestore(&data->lock, flags);
+	mutex_unlock(&data->mutex);
+	return work;
+}
+
+/*
+ * input class device
+ */
+static int picolcd_raw_keypad(struct picolcd_data *data,
+		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
+	 */
+	int i, j;
+
+	/* determine newly pressed keys */
+	for (i = 0; i < size; i++) {
+		unsigned 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 (raw_data[i] < PICOLCD_KEYS)
+			key_code = data->keycode[raw_data[i]];
+		else
+			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++) {
+		unsigned 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 (data->pressed_keys[j] < PICOLCD_KEYS)
+			key_code = data->keycode[data->pressed_keys[j]];
+		else
+			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;
+}
+
+static int picolcd_check_version(struct hid_device *hdev)
+{
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+	struct picolcd_pending *verinfo;
+	int ret = 0;
+
+	if (!data)
+		return -ENODEV;
+
+	verinfo = picolcd_send_and_wait(hdev, REPORT_VERSION, NULL, 0);
+	if (!verinfo) {
+		hid_err(hdev, "no version response from PicoLCD\n");
+		return -ENODEV;
+	}
+
+	if (verinfo->raw_size == 2) {
+		data->version[0] = verinfo->raw_data[1];
+		data->version[1] = verinfo->raw_data[0];
+		if (data->status & PICOLCD_BOOTLOADER) {
+			hid_info(hdev, "PicoLCD, bootloader version %d.%d\n",
+				 verinfo->raw_data[1], verinfo->raw_data[0]);
+		} else {
+			hid_info(hdev, "PicoLCD, firmware version %d.%d\n",
+				 verinfo->raw_data[1], verinfo->raw_data[0]);
+		}
+	} else {
+		hid_err(hdev, "confused, got unexpected version response from PicoLCD\n");
+		ret = -EINVAL;
+	}
+	kfree(verinfo);
+	return ret;
+}
+
+/*
+ * Reset our device and wait for answer to VERSION request
+ */
+int picolcd_reset(struct hid_device *hdev)
+{
+	struct picolcd_data *data = hid_get_drvdata(hdev);
+	struct hid_report *report = picolcd_out_report(REPORT_RESET, hdev);
+	unsigned long flags;
+	int error;
+
+	if (!data || !report || report->maxfield != 1)
+		return -ENODEV;
+
+	spin_lock_irqsave(&data->lock, flags);
+	if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
+		data->status |= PICOLCD_BOOTLOADER;
+
+	/* perform the reset */
+	hid_set_field(report->field[0], 0, 1);
+	usbhid_submit_report(hdev, report, USB_DIR_OUT);
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	error = picolcd_check_version(hdev);
+	if (error)
+		return error;
+
+	picolcd_resume_lcd(data);
+	picolcd_resume_backlight(data);
+	picolcd_fb_refresh(data);
+	picolcd_leds_set(data);
+	return 0;
+}
+
+/*
+ * The "operation_mode" sysfs attribute
+ */
+static ssize_t picolcd_operation_mode_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct picolcd_data *data = dev_get_drvdata(dev);
+
+	if (data->status & PICOLCD_BOOTLOADER)
+		return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
+	else
+		return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
+}
+
+static ssize_t picolcd_operation_mode_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct picolcd_data *data = dev_get_drvdata(dev);
+	struct hid_report *report = NULL;
+	size_t cnt = count;
+	int timeout = data->opmode_delay;
+	unsigned long flags;
+
+	if (cnt >= 3 && strncmp("lcd", buf, 3) == 0) {
+		if (data->status & PICOLCD_BOOTLOADER)
+			report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev);
+		buf += 3;
+		cnt -= 3;
+	} else if (cnt >= 10 && strncmp("bootloader", buf, 10) == 0) {
+		if (!(data->status & PICOLCD_BOOTLOADER))
+			report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev);
+		buf += 10;
+		cnt -= 10;
+	}
+	if (!report)
+		return -EINVAL;
+
+	while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r'))
+		cnt--;
+	if (cnt != 0)
+		return -EINVAL;
+
+	spin_lock_irqsave(&data->lock, flags);
+	hid_set_field(report->field[0], 0, timeout & 0xff);
+	hid_set_field(report->field[0], 1, (timeout >> 8) & 0xff);
+	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
+	spin_unlock_irqrestore(&data->lock, flags);
+	return count;
+}
+
+static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show,
+		picolcd_operation_mode_store);
+
+/*
+ * The "operation_mode_delay" sysfs attribute
+ */
+static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct picolcd_data *data = dev_get_drvdata(dev);
+
+	return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
+}
+
+static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct picolcd_data *data = dev_get_drvdata(dev);
+	unsigned u;
+	if (sscanf(buf, "%u", &u) != 1)
+		return -EINVAL;
+	if (u > 30000)
+		return -EINVAL;
+	else
+		data->opmode_delay = u;
+	return count;
+}
+
+static DEVICE_ATTR(operation_mode_delay, 0644, picolcd_operation_mode_delay_show,
+		picolcd_operation_mode_delay_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);
+	unsigned long flags;
+	int ret = 0;
+
+	if (!data)
+		return 1;
+
+	if (report->id == REPORT_KEY_STATE) {
+		if (data->input_keys)
+			ret = picolcd_raw_keypad(data, report, raw_data+1, size-1);
+	} else if (report->id == REPORT_IR_DATA) {
+		if (data->input_cir)
+			ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
+	} else {
+		spin_lock_irqsave(&data->lock, flags);
+		/*
+		 * We let the caller of picolcd_send_and_wait() check if the
+		 * report we got is one of the expected ones or not.
+		 */
+		if (data->pending) {
+			memcpy(data->pending->raw_data, raw_data+1, size-1);
+			data->pending->raw_size  = size-1;
+			data->pending->in_report = report;
+			complete(&data->pending->ready);
+		}
+		spin_unlock_irqrestore(&data->lock, flags);
+	}
+
+	picolcd_debug_raw_event(data, hdev, report, raw_data, size);
+	return 1;
+}
+
+#ifdef CONFIG_PM
+static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)
+{
+	if (PMSG_IS_AUTO(message))
+		return 0;
+
+	picolcd_suspend_backlight(hid_get_drvdata(hdev));
+	dbg_hid(PICOLCD_NAME " device ready for suspend\n");
+	return 0;
+}
+
+static int picolcd_resume(struct hid_device *hdev)
+{
+	int ret;
+	ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
+	if (ret)
+		dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
+	return 0;
+}
+
+static int picolcd_reset_resume(struct hid_device *hdev)
+{
+	int ret;
+	ret = picolcd_reset(hdev);
+	if (ret)
+		dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);
+	ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);
+	if (ret)
+		dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);
+	ret = picolcd_resume_lcd(hid_get_drvdata(hdev));
+	if (ret)
+		dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);
+	ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
+	if (ret)
+		dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
+	picolcd_leds_set(hid_get_drvdata(hdev));
+	return 0;
+}
+#endif
+
+/* initialize keypad input device */
+static int picolcd_init_keys(struct picolcd_data *data,
+		struct hid_report *report)
+{
+	struct hid_device *hdev = data->hdev;
+	struct input_dev *idev;
+	int error, i;
+
+	if (!report)
+		return -ENODEV;
+	if (report->maxfield != 1 || report->field[0]->report_count != 2 ||
+			report->field[0]->report_size != 8) {
+		hid_err(hdev, "unsupported KEY_STATE report\n");
+		return -EINVAL;
+	}
+
+	idev = input_allocate_device();
+	if (idev == NULL) {
+		hid_err(hdev, "failed to allocate input device\n");
+		return -ENOMEM;
+	}
+	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(data->keycode[0]);
+	input_set_capability(idev, EV_MSC, MSC_SCAN);
+	set_bit(EV_REP, idev->evbit);
+	for (i = 0; i < PICOLCD_KEYS; i++)
+		input_set_capability(idev, EV_KEY, data->keycode[i]);
+	error = input_register_device(idev);
+	if (error) {
+		hid_err(hdev, "error registering the input device\n");
+		input_free_device(idev);
+		return error;
+	}
+	data->input_keys = idev;
+	return 0;
+}
+
+static void picolcd_exit_keys(struct picolcd_data *data)
+{
+	struct input_dev *idev = data->input_keys;
+
+	data->input_keys = NULL;
+	if (idev)
+		input_unregister_device(idev);
+}
+
+static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
+{
+	int error;
+
+	error = picolcd_check_version(hdev);
+	if (error)
+		return error;
+
+	if (data->version[0] != 0 && data->version[1] != 3)
+		hid_info(hdev, "Device with untested firmware revision, please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
+			 dev_name(&hdev->dev));
+
+	/* Setup keypad input device */
+	error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev));
+	if (error)
+		goto err;
+
+	/* Setup CIR input device */
+	error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev));
+	if (error)
+		goto err;
+
+	/* Set up the framebuffer device */
+	error = picolcd_init_framebuffer(data);
+	if (error)
+		goto err;
+
+	/* Setup lcd class device */
+	error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev));
+	if (error)
+		goto err;
+
+	/* Setup backlight class device */
+	error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev));
+	if (error)
+		goto err;
+
+	/* Setup the LED class devices */
+	error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev));
+	if (error)
+		goto err;
+
+	picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev),
+			picolcd_out_report(REPORT_EE_WRITE, hdev),
+			picolcd_out_report(REPORT_READ_MEMORY, hdev),
+			picolcd_out_report(REPORT_WRITE_MEMORY, hdev),
+			picolcd_out_report(REPORT_RESET, hdev));
+	return 0;
+err:
+	picolcd_exit_leds(data);
+	picolcd_exit_backlight(data);
+	picolcd_exit_lcd(data);
+	picolcd_exit_framebuffer(data);
+	picolcd_exit_cir(data);
+	picolcd_exit_keys(data);
+	return error;
+}
+
+static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data)
+{
+	int error;
+
+	error = picolcd_check_version(hdev);
+	if (error)
+		return error;
+
+	if (data->version[0] != 1 && data->version[1] != 0)
+		hid_info(hdev, "Device with untested bootloader revision, please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
+			 dev_name(&hdev->dev));
+
+	picolcd_init_devfs(data, NULL, NULL,
+			picolcd_out_report(REPORT_BL_READ_MEMORY, hdev),
+			picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL);
+	return 0;
+}
+
+static int picolcd_probe(struct hid_device *hdev,
+		     const struct hid_device_id *id)
+{
+	struct picolcd_data *data;
+	int error = -ENOMEM;
+
+	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) {
+		hid_err(hdev, "can't allocate space for Minibox PicoLCD device data\n");
+		error = -ENOMEM;
+		goto err_no_cleanup;
+	}
+
+	spin_lock_init(&data->lock);
+	mutex_init(&data->mutex);
+	data->hdev = hdev;
+	data->opmode_delay = 5000;
+	if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
+		data->status |= PICOLCD_BOOTLOADER;
+	hid_set_drvdata(hdev, data);
+
+	/* Parse the device reports and start it up */
+	error = hid_parse(hdev);
+	if (error) {
+		hid_err(hdev, "device report parse failed\n");
+		goto err_cleanup_data;
+	}
+
+	/* We don't use hidinput but hid_hw_start() fails if nothing is
+	 * claimed. So spoof claimed input. */
+	hdev->claimed = HID_CLAIMED_INPUT;
+	error = hid_hw_start(hdev, 0);
+	hdev->claimed = 0;
+	if (error) {
+		hid_err(hdev, "hardware start failed\n");
+		goto err_cleanup_data;
+	}
+
+	error = hid_hw_open(hdev);
+	if (error) {
+		hid_err(hdev, "failed to open input interrupt pipe for key and IR events\n");
+		goto err_cleanup_hid_hw;
+	}
+
+	error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay);
+	if (error) {
+		hid_err(hdev, "failed to create sysfs attributes\n");
+		goto err_cleanup_hid_ll;
+	}
+
+	error = device_create_file(&hdev->dev, &dev_attr_operation_mode);
+	if (error) {
+		hid_err(hdev, "failed to create sysfs attributes\n");
+		goto err_cleanup_sysfs1;
+	}
+
+	if (data->status & PICOLCD_BOOTLOADER)
+		error = picolcd_probe_bootloader(hdev, data);
+	else
+		error = picolcd_probe_lcd(hdev, data);
+	if (error)
+		goto err_cleanup_sysfs2;
+
+	dbg_hid(PICOLCD_NAME " activated and initialized\n");
+	return 0;
+
+err_cleanup_sysfs2:
+	device_remove_file(&hdev->dev, &dev_attr_operation_mode);
+err_cleanup_sysfs1:
+	device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
+err_cleanup_hid_ll:
+	hid_hw_close(hdev);
+err_cleanup_hid_hw:
+	hid_hw_stop(hdev);
+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);
+	unsigned long flags;
+
+	dbg_hid(PICOLCD_NAME " hardware remove...\n");
+	spin_lock_irqsave(&data->lock, flags);
+	data->status |= PICOLCD_FAILED;
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	picolcd_exit_devfs(data);
+	device_remove_file(&hdev->dev, &dev_attr_operation_mode);
+	device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
+	hid_hw_close(hdev);
+	hid_hw_stop(hdev);
+	hid_set_drvdata(hdev, NULL);
+
+	/* Shortcut potential pending reply that will never arrive */
+	spin_lock_irqsave(&data->lock, flags);
+	if (data->pending)
+		complete(&data->pending->ready);
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	/* Cleanup LED */
+	picolcd_exit_leds(data);
+	/* Clean up the framebuffer */
+	picolcd_exit_backlight(data);
+	picolcd_exit_lcd(data);
+	picolcd_exit_framebuffer(data);
+	/* Cleanup input */
+	picolcd_exit_cir(data);
+	picolcd_exit_keys(data);
+
+	mutex_destroy(&data->mutex);
+	/* 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) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
+	{ }
+};
+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,
+#ifdef CONFIG_PM
+	.suspend =       picolcd_suspend,
+	.resume =        picolcd_resume,
+	.reset_resume =  picolcd_reset_resume,
+#endif
+};
+
+static int __init picolcd_init(void)
+{
+	return hid_register_driver(&picolcd_driver);
+}
+
+static void __exit picolcd_exit(void)
+{
+	hid_unregister_driver(&picolcd_driver);
+	picolcd_fb_unload();
+}
+
+module_init(picolcd_init);
+module_exit(picolcd_exit);
+MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/hid/hid-picolcd_debugfs.c b/drivers/hid/hid-picolcd_debugfs.c
new file mode 100644
index 00000000000..ff746456823
--- /dev/null
+++ b/drivers/hid/hid-picolcd_debugfs.c
@@ -0,0 +1,898 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2012 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, 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/hid-debug.h>
+#include "usbhid/usbhid.h"
+#include <linux/usb.h>
+
+#include <linux/fb.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+
+#include <linux/module.h>
+
+#include "hid-picolcd.h"
+
+
+static int picolcd_debug_reset_show(struct seq_file *f, void *p)
+{
+	if (picolcd_fbinfo((struct picolcd_data *)f->private))
+		seq_printf(f, "all fb\n");
+	else
+		seq_printf(f, "all\n");
+	return 0;
+}
+
+static int picolcd_debug_reset_open(struct inode *inode, struct file *f)
+{
+	return single_open(f, picolcd_debug_reset_show, inode->i_private);
+}
+
+static ssize_t picolcd_debug_reset_write(struct file *f, const char __user *user_buf,
+		size_t count, loff_t *ppos)
+{
+	struct picolcd_data *data = ((struct seq_file *)f->private_data)->private;
+	char buf[32];
+	size_t cnt = min(count, sizeof(buf)-1);
+	if (copy_from_user(buf, user_buf, cnt))
+		return -EFAULT;
+
+	while (cnt > 0 && (buf[cnt-1] == ' ' || buf[cnt-1] == '\n'))
+		cnt--;
+	buf[cnt] = '\0';
+	if (strcmp(buf, "all") == 0) {
+		picolcd_reset(data->hdev);
+		picolcd_fb_reset(data, 1);
+	} else if (strcmp(buf, "fb") == 0) {
+		picolcd_fb_reset(data, 1);
+	} else {
+		return -EINVAL;
+	}
+	return count;
+}
+
+static const struct file_operations picolcd_debug_reset_fops = {
+	.owner    = THIS_MODULE,
+	.open     = picolcd_debug_reset_open,
+	.read     = seq_read,
+	.llseek   = seq_lseek,
+	.write    = picolcd_debug_reset_write,
+	.release  = single_release,
+};
+
+/*
+ * The "eeprom" file
+ */
+static ssize_t picolcd_debug_eeprom_read(struct file *f, char __user *u,
+		size_t s, loff_t *off)
+{
+	struct picolcd_data *data = f->private_data;
+	struct picolcd_pending *resp;
+	u8 raw_data[3];
+	ssize_t ret = -EIO;
+
+	if (s == 0)
+		return -EINVAL;
+	if (*off > 0x0ff)
+		return 0;
+
+	/* prepare buffer with info about what we want to read (addr & len) */
+	raw_data[0] = *off & 0xff;
+	raw_data[1] = (*off >> 8) & 0xff;
+	raw_data[2] = s < 20 ? s : 20;
+	if (*off + raw_data[2] > 0xff)
+		raw_data[2] = 0x100 - *off;
+	resp = picolcd_send_and_wait(data->hdev, REPORT_EE_READ, raw_data,
+			sizeof(raw_data));
+	if (!resp)
+		return -EIO;
+
+	if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) {
+		/* successful read :) */
+		ret = resp->raw_data[2];
+		if (ret > s)
+			ret = s;
+		if (copy_to_user(u, resp->raw_data+3, ret))
+			ret = -EFAULT;
+		else
+			*off += ret;
+	} /* anything else is some kind of IO error */
+
+	kfree(resp);
+	return ret;
+}
+
+static ssize_t picolcd_debug_eeprom_write(struct file *f, const char __user *u,
+		size_t s, loff_t *off)
+{
+	struct picolcd_data *data = f->private_data;
+	struct picolcd_pending *resp;
+	ssize_t ret = -EIO;
+	u8 raw_data[23];
+
+	if (s == 0)
+		return -EINVAL;
+	if (*off > 0x0ff)
+		return -ENOSPC;
+
+	memset(raw_data, 0, sizeof(raw_data));
+	raw_data[0] = *off & 0xff;
+	raw_data[1] = (*off >> 8) & 0xff;
+	raw_data[2] = min((size_t)20, s);
+	if (*off + raw_data[2] > 0xff)
+		raw_data[2] = 0x100 - *off;
+
+	if (copy_from_user(raw_data+3, u, min((u8)20, raw_data[2])))
+		return -EFAULT;
+	resp = picolcd_send_and_wait(data->hdev, REPORT_EE_WRITE, raw_data,
+			sizeof(raw_data));
+
+	if (!resp)
+		return -EIO;
+
+	if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) {
+		/* check if written data matches */
+		if (memcmp(raw_data, resp->raw_data, 3+raw_data[2]) == 0) {
+			*off += raw_data[2];
+			ret = raw_data[2];
+		}
+	}
+	kfree(resp);
+	return ret;
+}
+
+/*
+ * Notes:
+ * - read/write happens in chunks of at most 20 bytes, it's up to userspace
+ *   to loop in order to get more data.
+ * - on write errors on otherwise correct write request the bytes
+ *   that should have been written are in undefined state.
+ */
+static const struct file_operations picolcd_debug_eeprom_fops = {
+	.owner    = THIS_MODULE,
+	.open     = simple_open,
+	.read     = picolcd_debug_eeprom_read,
+	.write    = picolcd_debug_eeprom_write,
+	.llseek   = generic_file_llseek,
+};
+
+/*
+ * The "flash" file
+ */
+/* record a flash address to buf (bounds check to be done by caller) */
+static int _picolcd_flash_setaddr(struct picolcd_data *data, u8 *buf, long off)
+{
+	buf[0] = off & 0xff;
+	buf[1] = (off >> 8) & 0xff;
+	if (data->addr_sz == 3)
+		buf[2] = (off >> 16) & 0xff;
+	return data->addr_sz == 2 ? 2 : 3;
+}
+
+/* read a given size of data (bounds check to be done by caller) */
+static ssize_t _picolcd_flash_read(struct picolcd_data *data, int report_id,
+		char __user *u, size_t s, loff_t *off)
+{
+	struct picolcd_pending *resp;
+	u8 raw_data[4];
+	ssize_t ret = 0;
+	int len_off, err = -EIO;
+
+	while (s > 0) {
+		err = -EIO;
+		len_off = _picolcd_flash_setaddr(data, raw_data, *off);
+		raw_data[len_off] = s > 32 ? 32 : s;
+		resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1);
+		if (!resp || !resp->in_report)
+			goto skip;
+		if (resp->in_report->id == REPORT_MEMORY ||
+			resp->in_report->id == REPORT_BL_READ_MEMORY) {
+			if (memcmp(raw_data, resp->raw_data, len_off+1) != 0)
+				goto skip;
+			if (copy_to_user(u+ret, resp->raw_data+len_off+1, raw_data[len_off])) {
+				err = -EFAULT;
+				goto skip;
+			}
+			*off += raw_data[len_off];
+			s    -= raw_data[len_off];
+			ret  += raw_data[len_off];
+			err   = 0;
+		}
+skip:
+		kfree(resp);
+		if (err)
+			return ret > 0 ? ret : err;
+	}
+	return ret;
+}
+
+static ssize_t picolcd_debug_flash_read(struct file *f, char __user *u,
+		size_t s, loff_t *off)
+{
+	struct picolcd_data *data = f->private_data;
+
+	if (s == 0)
+		return -EINVAL;
+	if (*off > 0x05fff)
+		return 0;
+	if (*off + s > 0x05fff)
+		s = 0x06000 - *off;
+
+	if (data->status & PICOLCD_BOOTLOADER)
+		return _picolcd_flash_read(data, REPORT_BL_READ_MEMORY, u, s, off);
+	else
+		return _picolcd_flash_read(data, REPORT_READ_MEMORY, u, s, off);
+}
+
+/* erase block aligned to 64bytes boundary */
+static ssize_t _picolcd_flash_erase64(struct picolcd_data *data, int report_id,
+		loff_t *off)
+{
+	struct picolcd_pending *resp;
+	u8 raw_data[3];
+	int len_off;
+	ssize_t ret = -EIO;
+
+	if (*off & 0x3f)
+		return -EINVAL;
+
+	len_off = _picolcd_flash_setaddr(data, raw_data, *off);
+	resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off);
+	if (!resp || !resp->in_report)
+		goto skip;
+	if (resp->in_report->id == REPORT_MEMORY ||
+		resp->in_report->id == REPORT_BL_ERASE_MEMORY) {
+		if (memcmp(raw_data, resp->raw_data, len_off) != 0)
+			goto skip;
+		ret = 0;
+	}
+skip:
+	kfree(resp);
+	return ret;
+}
+
+/* write a given size of data (bounds check to be done by caller) */
+static ssize_t _picolcd_flash_write(struct picolcd_data *data, int report_id,
+		const char __user *u, size_t s, loff_t *off)
+{
+	struct picolcd_pending *resp;
+	u8 raw_data[36];
+	ssize_t ret = 0;
+	int len_off, err = -EIO;
+
+	while (s > 0) {
+		err = -EIO;
+		len_off = _picolcd_flash_setaddr(data, raw_data, *off);
+		raw_data[len_off] = s > 32 ? 32 : s;
+		if (copy_from_user(raw_data+len_off+1, u, raw_data[len_off])) {
+			err = -EFAULT;
+			break;
+		}
+		resp = picolcd_send_and_wait(data->hdev, report_id, raw_data,
+				len_off+1+raw_data[len_off]);
+		if (!resp || !resp->in_report)
+			goto skip;
+		if (resp->in_report->id == REPORT_MEMORY ||
+			resp->in_report->id == REPORT_BL_WRITE_MEMORY) {
+			if (memcmp(raw_data, resp->raw_data, len_off+1+raw_data[len_off]) != 0)
+				goto skip;
+			*off += raw_data[len_off];
+			s    -= raw_data[len_off];
+			ret  += raw_data[len_off];
+			err   = 0;
+		}
+skip:
+		kfree(resp);
+		if (err)
+			break;
+	}
+	return ret > 0 ? ret : err;
+}
+
+static ssize_t picolcd_debug_flash_write(struct file *f, const char __user *u,
+		size_t s, loff_t *off)
+{
+	struct picolcd_data *data = f->private_data;
+	ssize_t err, ret = 0;
+	int report_erase, report_write;
+
+	if (s == 0)
+		return -EINVAL;
+	if (*off > 0x5fff)
+		return -ENOSPC;
+	if (s & 0x3f)
+		return -EINVAL;
+	if (*off & 0x3f)
+		return -EINVAL;
+
+	if (data->status & PICOLCD_BOOTLOADER) {
+		report_erase = REPORT_BL_ERASE_MEMORY;
+		report_write = REPORT_BL_WRITE_MEMORY;
+	} else {
+		report_erase = REPORT_ERASE_MEMORY;
+		report_write = REPORT_WRITE_MEMORY;
+	}
+	mutex_lock(&data->mutex_flash);
+	while (s > 0) {
+		err = _picolcd_flash_erase64(data, report_erase, off);
+		if (err)
+			break;
+		err = _picolcd_flash_write(data, report_write, u, 64, off);
+		if (err < 0)
+			break;
+		ret += err;
+		*off += err;
+		s -= err;
+		if (err != 64)
+			break;
+	}
+	mutex_unlock(&data->mutex_flash);
+	return ret > 0 ? ret : err;
+}
+
+/*
+ * Notes:
+ * - concurrent writing is prevented by mutex and all writes must be
+ *   n*64 bytes and 64-byte aligned, each write being preceded by an
+ *   ERASE which erases a 64byte block.
+ *   If less than requested was written or an error is returned for an
+ *   otherwise correct write request the next 64-byte block which should
+ *   have been written is in undefined state (mostly: original, erased,
+ *   (half-)written with write error)
+ * - reading can happen without special restriction
+ */
+static const struct file_operations picolcd_debug_flash_fops = {
+	.owner    = THIS_MODULE,
+	.open     = simple_open,
+	.read     = picolcd_debug_flash_read,
+	.write    = picolcd_debug_flash_write,
+	.llseek   = generic_file_llseek,
+};
+
+
+/*
+ * Helper code for HID report level dumping/debugging
+ */
+static const char *error_codes[] = {
+	"success", "parameter missing", "data_missing", "block readonly",
+	"block not erasable", "block too big", "section overflow",
+	"invalid command length", "invalid data length",
+};
+
+static void dump_buff_as_hex(char *dst, size_t dst_sz, const u8 *data,
+		const size_t data_len)
+{
+	int i, j;
+	for (i = j = 0; i < data_len && j + 3 < dst_sz; i++) {
+		dst[j++] = hex_asc[(data[i] >> 4) & 0x0f];
+		dst[j++] = hex_asc[data[i] & 0x0f];
+		dst[j++] = ' ';
+	}
+	if (j < dst_sz) {
+		dst[j--] = '\0';
+		dst[j] = '\n';
+	} else
+		dst[j] = '\0';
+}
+
+void picolcd_debug_out_report(struct picolcd_data *data,
+		struct hid_device *hdev, struct hid_report *report)
+{
+	u8 raw_data[70];
+	int raw_size = (report->size >> 3) + 1;
+	char *buff;
+#define BUFF_SZ 256
+
+	/* Avoid unnecessary overhead if debugfs is disabled */
+	if (!hdev->debug_events)
+		return;
+
+	buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
+	if (!buff)
+		return;
+
+	snprintf(buff, BUFF_SZ, "\nout report %d (size %d) =  ",
+			report->id, raw_size);
+	hid_debug_event(hdev, buff);
+	if (raw_size + 5 > sizeof(raw_data)) {
+		kfree(buff);
+		hid_debug_event(hdev, " TOO BIG\n");
+		return;
+	} else {
+		raw_data[0] = report->id;
+		hid_output_report(report, raw_data);
+		dump_buff_as_hex(buff, BUFF_SZ, raw_data, raw_size);
+		hid_debug_event(hdev, buff);
+	}
+
+	switch (report->id) {
+	case REPORT_LED_STATE:
+		/* 1 data byte with GPO state */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_LED_STATE", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tGPO state: 0x%02x\n", raw_data[1]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_BRIGHTNESS:
+		/* 1 data byte with brightness */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_BRIGHTNESS", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tBrightness: 0x%02x\n", raw_data[1]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_CONTRAST:
+		/* 1 data byte with contrast */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_CONTRAST", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tContrast: 0x%02x\n", raw_data[1]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_RESET:
+		/* 2 data bytes with reset duration in ms */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_RESET", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tDuration: 0x%02x%02x (%dms)\n",
+				raw_data[2], raw_data[1], raw_data[2] << 8 | raw_data[1]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_LCD_CMD:
+		/* 63 data bytes with LCD commands */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_LCD_CMD", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		/* TODO: format decoding */
+		break;
+	case REPORT_LCD_DATA:
+		/* 63 data bytes with LCD data */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_LCD_CMD", report->id, raw_size-1);
+		/* TODO: format decoding */
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_LCD_CMD_DATA:
+		/* 63 data bytes with LCD commands and data */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_LCD_CMD", report->id, raw_size-1);
+		/* TODO: format decoding */
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_EE_READ:
+		/* 3 data bytes with read area description */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_EE_READ", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
+				raw_data[2], raw_data[1]);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_EE_WRITE:
+		/* 3+1..20 data bytes with write area description */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_EE_WRITE", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
+				raw_data[2], raw_data[1]);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
+		hid_debug_event(hdev, buff);
+		if (raw_data[3] == 0) {
+			snprintf(buff, BUFF_SZ, "\tNo data\n");
+		} else if (raw_data[3] + 4 <= raw_size) {
+			snprintf(buff, BUFF_SZ, "\tData: ");
+			hid_debug_event(hdev, buff);
+			dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
+		} else {
+			snprintf(buff, BUFF_SZ, "\tData overflowed\n");
+		}
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_ERASE_MEMORY:
+	case REPORT_BL_ERASE_MEMORY:
+		/* 3 data bytes with pointer inside erase block */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_ERASE_MEMORY", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		switch (data->addr_sz) {
+		case 2:
+			snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x\n",
+					raw_data[2], raw_data[1]);
+			break;
+		case 3:
+			snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x%02x\n",
+					raw_data[3], raw_data[2], raw_data[1]);
+			break;
+		default:
+			snprintf(buff, BUFF_SZ, "\tNot supported\n");
+		}
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_READ_MEMORY:
+	case REPORT_BL_READ_MEMORY:
+		/* 4 data bytes with read area description */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_READ_MEMORY", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		switch (data->addr_sz) {
+		case 2:
+			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
+					raw_data[2], raw_data[1]);
+			hid_debug_event(hdev, buff);
+			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
+			break;
+		case 3:
+			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
+					raw_data[3], raw_data[2], raw_data[1]);
+			hid_debug_event(hdev, buff);
+			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
+			break;
+		default:
+			snprintf(buff, BUFF_SZ, "\tNot supported\n");
+		}
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_WRITE_MEMORY:
+	case REPORT_BL_WRITE_MEMORY:
+		/* 4+1..32 data bytes with write adrea description */
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_WRITE_MEMORY", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		switch (data->addr_sz) {
+		case 2:
+			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
+					raw_data[2], raw_data[1]);
+			hid_debug_event(hdev, buff);
+			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
+			hid_debug_event(hdev, buff);
+			if (raw_data[3] == 0) {
+				snprintf(buff, BUFF_SZ, "\tNo data\n");
+			} else if (raw_data[3] + 4 <= raw_size) {
+				snprintf(buff, BUFF_SZ, "\tData: ");
+				hid_debug_event(hdev, buff);
+				dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
+			} else {
+				snprintf(buff, BUFF_SZ, "\tData overflowed\n");
+			}
+			break;
+		case 3:
+			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
+					raw_data[3], raw_data[2], raw_data[1]);
+			hid_debug_event(hdev, buff);
+			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
+			hid_debug_event(hdev, buff);
+			if (raw_data[4] == 0) {
+				snprintf(buff, BUFF_SZ, "\tNo data\n");
+			} else if (raw_data[4] + 5 <= raw_size) {
+				snprintf(buff, BUFF_SZ, "\tData: ");
+				hid_debug_event(hdev, buff);
+				dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]);
+			} else {
+				snprintf(buff, BUFF_SZ, "\tData overflowed\n");
+			}
+			break;
+		default:
+			snprintf(buff, BUFF_SZ, "\tNot supported\n");
+		}
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_SPLASH_RESTART:
+		/* TODO */
+		break;
+	case REPORT_EXIT_KEYBOARD:
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_EXIT_KEYBOARD", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n",
+				raw_data[1] | (raw_data[2] << 8),
+				raw_data[2], raw_data[1]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_VERSION:
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_VERSION", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_DEVID:
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_DEVID", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_SPLASH_SIZE:
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_SPLASH_SIZE", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_HOOK_VERSION:
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_HOOK_VERSION", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_EXIT_FLASHER:
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"REPORT_VERSION", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n",
+				raw_data[1] | (raw_data[2] << 8),
+				raw_data[2], raw_data[1]);
+		hid_debug_event(hdev, buff);
+		break;
+	default:
+		snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
+			"<unknown>", report->id, raw_size-1);
+		hid_debug_event(hdev, buff);
+		break;
+	}
+	wake_up_interruptible(&hdev->debug_wait);
+	kfree(buff);
+}
+
+void picolcd_debug_raw_event(struct picolcd_data *data,
+		struct hid_device *hdev, struct hid_report *report,
+		u8 *raw_data, int size)
+{
+	char *buff;
+
+#define BUFF_SZ 256
+	/* Avoid unnecessary overhead if debugfs is disabled */
+	if (!hdev->debug_events)
+		return;
+
+	buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
+	if (!buff)
+		return;
+
+	switch (report->id) {
+	case REPORT_ERROR_CODE:
+		/* 2 data bytes with affected report and error code */
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_ERROR_CODE", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		if (raw_data[2] < ARRAY_SIZE(error_codes))
+			snprintf(buff, BUFF_SZ, "\tError code 0x%02x (%s) in reply to report 0x%02x\n",
+					raw_data[2], error_codes[raw_data[2]], raw_data[1]);
+		else
+			snprintf(buff, BUFF_SZ, "\tError code 0x%02x in reply to report 0x%02x\n",
+					raw_data[2], raw_data[1]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_KEY_STATE:
+		/* 2 data bytes with key state */
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_KEY_STATE", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		if (raw_data[1] == 0)
+			snprintf(buff, BUFF_SZ, "\tNo key pressed\n");
+		else if (raw_data[2] == 0)
+			snprintf(buff, BUFF_SZ, "\tOne key pressed: 0x%02x (%d)\n",
+					raw_data[1], raw_data[1]);
+		else
+			snprintf(buff, BUFF_SZ, "\tTwo keys pressed: 0x%02x (%d), 0x%02x (%d)\n",
+					raw_data[1], raw_data[1], raw_data[2], raw_data[2]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_IR_DATA:
+		/* Up to 20 byes of IR scancode data */
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_IR_DATA", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		if (raw_data[1] == 0) {
+			snprintf(buff, BUFF_SZ, "\tUnexpectedly 0 data length\n");
+			hid_debug_event(hdev, buff);
+		} else if (raw_data[1] + 1 <= size) {
+			snprintf(buff, BUFF_SZ, "\tData length: %d\n\tIR Data: ",
+					raw_data[1]-1);
+			hid_debug_event(hdev, buff);
+			dump_buff_as_hex(buff, BUFF_SZ, raw_data+2, raw_data[1]-1);
+			hid_debug_event(hdev, buff);
+		} else {
+			snprintf(buff, BUFF_SZ, "\tOverflowing data length: %d\n",
+					raw_data[1]-1);
+			hid_debug_event(hdev, buff);
+		}
+		break;
+	case REPORT_EE_DATA:
+		/* Data buffer in response to REPORT_EE_READ or REPORT_EE_WRITE */
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_EE_DATA", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
+				raw_data[2], raw_data[1]);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
+		hid_debug_event(hdev, buff);
+		if (raw_data[3] == 0) {
+			snprintf(buff, BUFF_SZ, "\tNo data\n");
+			hid_debug_event(hdev, buff);
+		} else if (raw_data[3] + 4 <= size) {
+			snprintf(buff, BUFF_SZ, "\tData: ");
+			hid_debug_event(hdev, buff);
+			dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
+			hid_debug_event(hdev, buff);
+		} else {
+			snprintf(buff, BUFF_SZ, "\tData overflowed\n");
+			hid_debug_event(hdev, buff);
+		}
+		break;
+	case REPORT_MEMORY:
+		/* Data buffer in response to REPORT_READ_MEMORY or REPORT_WRTIE_MEMORY */
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_MEMORY", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		switch (data->addr_sz) {
+		case 2:
+			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
+					raw_data[2], raw_data[1]);
+			hid_debug_event(hdev, buff);
+			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
+			hid_debug_event(hdev, buff);
+			if (raw_data[3] == 0) {
+				snprintf(buff, BUFF_SZ, "\tNo data\n");
+			} else if (raw_data[3] + 4 <= size) {
+				snprintf(buff, BUFF_SZ, "\tData: ");
+				hid_debug_event(hdev, buff);
+				dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
+			} else {
+				snprintf(buff, BUFF_SZ, "\tData overflowed\n");
+			}
+			break;
+		case 3:
+			snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
+					raw_data[3], raw_data[2], raw_data[1]);
+			hid_debug_event(hdev, buff);
+			snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
+			hid_debug_event(hdev, buff);
+			if (raw_data[4] == 0) {
+				snprintf(buff, BUFF_SZ, "\tNo data\n");
+			} else if (raw_data[4] + 5 <= size) {
+				snprintf(buff, BUFF_SZ, "\tData: ");
+				hid_debug_event(hdev, buff);
+				dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]);
+			} else {
+				snprintf(buff, BUFF_SZ, "\tData overflowed\n");
+			}
+			break;
+		default:
+			snprintf(buff, BUFF_SZ, "\tNot supported\n");
+		}
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_VERSION:
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_VERSION", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n",
+				raw_data[2], raw_data[1]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_BL_ERASE_MEMORY:
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_BL_ERASE_MEMORY", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		/* TODO */
+		break;
+	case REPORT_BL_READ_MEMORY:
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_BL_READ_MEMORY", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		/* TODO */
+		break;
+	case REPORT_BL_WRITE_MEMORY:
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_BL_WRITE_MEMORY", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		/* TODO */
+		break;
+	case REPORT_DEVID:
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_DEVID", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tSerial: 0x%02x%02x%02x%02x\n",
+				raw_data[1], raw_data[2], raw_data[3], raw_data[4]);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tType: 0x%02x\n",
+				raw_data[5]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_SPLASH_SIZE:
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_SPLASH_SIZE", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tTotal splash space: %d\n",
+				(raw_data[2] << 8) | raw_data[1]);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tUsed splash space: %d\n",
+				(raw_data[4] << 8) | raw_data[3]);
+		hid_debug_event(hdev, buff);
+		break;
+	case REPORT_HOOK_VERSION:
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"REPORT_HOOK_VERSION", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n",
+				raw_data[1], raw_data[2]);
+		hid_debug_event(hdev, buff);
+		break;
+	default:
+		snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
+			"<unknown>", report->id, size-1);
+		hid_debug_event(hdev, buff);
+		break;
+	}
+	wake_up_interruptible(&hdev->debug_wait);
+	kfree(buff);
+}
+
+void picolcd_init_devfs(struct picolcd_data *data,
+		struct hid_report *eeprom_r, struct hid_report *eeprom_w,
+		struct hid_report *flash_r, struct hid_report *flash_w,
+		struct hid_report *reset)
+{
+	struct hid_device *hdev = data->hdev;
+
+	mutex_init(&data->mutex_flash);
+
+	/* reset */
+	if (reset)
+		data->debug_reset = debugfs_create_file("reset", 0600,
+				hdev->debug_dir, data, &picolcd_debug_reset_fops);
+
+	/* eeprom */
+	if (eeprom_r || eeprom_w)
+		data->debug_eeprom = debugfs_create_file("eeprom",
+			(eeprom_w ? S_IWUSR : 0) | (eeprom_r ? S_IRUSR : 0),
+			hdev->debug_dir, data, &picolcd_debug_eeprom_fops);
+
+	/* flash */
+	if (flash_r && flash_r->maxfield == 1 && flash_r->field[0]->report_size == 8)
+		data->addr_sz = flash_r->field[0]->report_count - 1;
+	else
+		data->addr_sz = -1;
+	if (data->addr_sz == 2 || data->addr_sz == 3) {
+		data->debug_flash = debugfs_create_file("flash",
+			(flash_w ? S_IWUSR : 0) | (flash_r ? S_IRUSR : 0),
+			hdev->debug_dir, data, &picolcd_debug_flash_fops);
+	} else if (flash_r || flash_w)
+		hid_warn(hdev, "Unexpected FLASH access reports, please submit rdesc for review\n");
+}
+
+void picolcd_exit_devfs(struct picolcd_data *data)
+{
+	struct dentry *dent;
+
+	dent = data->debug_reset;
+	data->debug_reset = NULL;
+	if (dent)
+		debugfs_remove(dent);
+	dent = data->debug_eeprom;
+	data->debug_eeprom = NULL;
+	if (dent)
+		debugfs_remove(dent);
+	dent = data->debug_flash;
+	data->debug_flash = NULL;
+	if (dent)
+		debugfs_remove(dent);
+	mutex_destroy(&data->mutex_flash);
+}
+
diff --git a/drivers/hid/hid-picolcd_fb.c b/drivers/hid/hid-picolcd_fb.c
new file mode 100644
index 00000000000..b2124f566c6
--- /dev/null
+++ b/drivers/hid/hid-picolcd_fb.c
@@ -0,0 +1,673 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2012 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, 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 "usbhid/usbhid.h"
+#include <linux/usb.h>
+
+#include <linux/fb.h>
+#include <linux/module.h>
+
+#include "hid-picolcd.h"
+
+/* 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_HEIGHT (64)
+#define PICOLCDFB_SIZE (PICOLCDFB_WIDTH * PICOLCDFB_HEIGHT / 8)
+
+#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_WIDTH / 8,
+	.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,
+	.grayscale      = 1,
+	.red            = {
+		.offset = 0,
+		.length = 1,
+		.msb_right = 0,
+	},
+	.green          = {
+		.offset = 0,
+		.length = 1,
+		.msb_right = 0,
+	},
+	.blue           = {
+		.offset = 0,
+		.length = 1,
+		.msb_right = 0,
+	},
+	.transp         = {
+		.offset = 0,
+		.length = 0,
+		.msb_right = 0,
+	},
+};
+
+/* Send a given tile to PicoLCD */
+static 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);
+	unsigned long flags;
+	u8 *tdata;
+	int i;
+
+	if (!report1 || report1->maxfield != 1 || !report2 || report2->maxfield != 1)
+		return -ENODEV;
+
+	spin_lock_irqsave(&data->lock, flags);
+	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);
+	spin_unlock_irqrestore(&data->lock, flags);
+	return 0;
+}
+
+/* Translate a single tile*/
+static int picolcd_fb_update_tile(u8 *vbitmap, const u8 *bitmap, int bpp,
+		int chip, int tile)
+{
+	int i, b, changed = 0;
+	u8 tdata[64];
+	u8 *vdata = vbitmap + (tile * 4 + chip) * 64;
+
+	if (bpp == 1) {
+		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] >> (i % 8)) & 0x01;
+			}
+		}
+	} else if (bpp == 8) {
+		for (b = 7; b >= 0; b--) {
+			const u8 *bdata = bitmap + (tile * 256 + chip * 8 + b * 32) * 8;
+			for (i = 0; i < 64; i++) {
+				tdata[i] <<= 1;
+				tdata[i] |= (bdata[i] & 0x80) ? 0x01 : 0x00;
+			}
+		}
+	} else {
+		/* Oops, we should never get here! */
+		WARN_ON(1);
+		return 0;
+	}
+
+	for (i = 0; i < 64; i++)
+		if (tdata[i] != vdata[i]) {
+			changed = 1;
+			vdata[i] = tdata[i];
+		}
+	return changed;
+}
+
+void picolcd_fb_refresh(struct picolcd_data *data)
+{
+	if (data->fb_info)
+		schedule_delayed_work(&data->fb_info->deferred_work, 0);
+}
+
+/* Reconfigure LCD display */
+int picolcd_fb_reset(struct picolcd_data *data, int clear)
+{
+	struct hid_report *report = picolcd_out_report(REPORT_LCD_CMD, data->hdev);
+	int i, j;
+	unsigned long flags;
+	static const u8 mapcmd[8] = { 0x00, 0x02, 0x00, 0x64, 0x3f, 0x00, 0x64, 0xc0 };
+
+	if (!report || report->maxfield != 1)
+		return -ENODEV;
+
+	spin_lock_irqsave(&data->lock, flags);
+	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);
+	}
+
+	data->status |= PICOLCD_READY_FB;
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	if (data->fb_bitmap) {
+		if (clear) {
+			memset(data->fb_vbitmap, 0, PICOLCDFB_SIZE);
+			memset(data->fb_bitmap, 0, PICOLCDFB_SIZE*data->fb_bpp);
+		}
+		data->fb_force = 1;
+	}
+
+	/* schedule first output of framebuffer */
+	picolcd_fb_refresh(data);
+
+	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, n;
+	unsigned long flags;
+
+	if (!data)
+		return;
+
+	spin_lock_irqsave(&data->lock, flags);
+	if (!(data->status & PICOLCD_READY_FB)) {
+		spin_unlock_irqrestore(&data->lock, flags);
+		picolcd_fb_reset(data, 0);
+	} else {
+		spin_unlock_irqrestore(&data->lock, flags);
+	}
+
+	/*
+	 * Translate the framebuffer into the format needed by the PicoLCD.
+	 * See display layout above.
+	 * Do this one tile after the other and push those tiles that changed.
+	 *
+	 * Wait for our IO to complete as otherwise we might flood the queue!
+	 */
+	n = 0;
+	for (chip = 0; chip < 4; chip++)
+		for (tile = 0; tile < 8; tile++)
+			if (picolcd_fb_update_tile(data->fb_vbitmap,
+					data->fb_bitmap, data->fb_bpp, chip, tile) ||
+				data->fb_force) {
+				n += 2;
+				if (!data->fb_info->par)
+					return; /* device lost! */
+				if (n >= HID_OUTPUT_FIFO_SIZE / 2) {
+					usbhid_wait_io(data->hdev);
+					n = 0;
+				}
+				picolcd_fb_send_tile(data->hdev, chip, tile);
+			}
+	data->fb_force = false;
+	if (n)
+		usbhid_wait_io(data->hdev);
+}
+
+/* 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);
+
+	schedule_delayed_work(&info->deferred_work, 0);
+}
+
+/* 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);
+
+	schedule_delayed_work(&info->deferred_work, 0);
+}
+
+/* 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);
+
+	schedule_delayed_work(&info->deferred_work, 0);
+}
+
+/*
+ * 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)
+		schedule_delayed_work(&info->deferred_work, 0);
+	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)
+{
+	struct picolcd_data *data = info->par;
+	u32 *ref_cnt = info->pseudo_palette;
+	int may_release;
+
+	info->par = NULL;
+	if (data)
+		data->fb_info = NULL;
+	fb_deferred_io_cleanup(info);
+
+	ref_cnt--;
+	mutex_lock(&info->lock);
+	(*ref_cnt)--;
+	may_release = !*ref_cnt;
+	mutex_unlock(&info->lock);
+	if (may_release) {
+		vfree((u8 *)info->fix.smem_start);
+		framebuffer_release(info);
+	}
+}
+
+static int picolcd_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	__u32 bpp      = var->bits_per_pixel;
+	__u32 activate = var->activate;
+
+	/* only allow 1/8 bit depth (8-bit is grayscale) */
+	*var = picolcdfb_var;
+	var->activate = activate;
+	if (bpp >= 8) {
+		var->bits_per_pixel = 8;
+		var->red.length     = 8;
+		var->green.length   = 8;
+		var->blue.length    = 8;
+	} else {
+		var->bits_per_pixel = 1;
+		var->red.length     = 1;
+		var->green.length   = 1;
+		var->blue.length    = 1;
+	}
+	return 0;
+}
+
+static int picolcd_set_par(struct fb_info *info)
+{
+	struct picolcd_data *data = info->par;
+	u8 *tmp_fb, *o_fb;
+	if (!data)
+		return -ENODEV;
+	if (info->var.bits_per_pixel == data->fb_bpp)
+		return 0;
+	/* switch between 1/8 bit depths */
+	if (info->var.bits_per_pixel != 1 && info->var.bits_per_pixel != 8)
+		return -EINVAL;
+
+	o_fb   = data->fb_bitmap;
+	tmp_fb = kmalloc(PICOLCDFB_SIZE*info->var.bits_per_pixel, GFP_KERNEL);
+	if (!tmp_fb)
+		return -ENOMEM;
+
+	/* translate FB content to new bits-per-pixel */
+	if (info->var.bits_per_pixel == 1) {
+		int i, b;
+		for (i = 0; i < PICOLCDFB_SIZE; i++) {
+			u8 p = 0;
+			for (b = 0; b < 8; b++) {
+				p <<= 1;
+				p |= o_fb[i*8+b] ? 0x01 : 0x00;
+			}
+			tmp_fb[i] = p;
+		}
+		memcpy(o_fb, tmp_fb, PICOLCDFB_SIZE);
+		info->fix.visual = FB_VISUAL_MONO01;
+		info->fix.line_length = PICOLCDFB_WIDTH / 8;
+	} else {
+		int i;
+		memcpy(tmp_fb, o_fb, PICOLCDFB_SIZE);
+		for (i = 0; i < PICOLCDFB_SIZE * 8; i++)
+			o_fb[i] = tmp_fb[i/8] & (0x01 << (7 - i % 8)) ? 0xff : 0x00;
+		info->fix.visual = FB_VISUAL_DIRECTCOLOR;
+		info->fix.line_length = PICOLCDFB_WIDTH;
+	}
+
+	kfree(tmp_fb);
+	data->fb_bpp      = info->var.bits_per_pixel;
+	return 0;
+}
+
+/* Do refcounting on our FB and cleanup per worker if FB is
+ * closed after unplug of our device
+ * (fb_release holds info->lock and still touches info after
+ *  we return so we can't release it immediately.
+ */
+struct picolcd_fb_cleanup_item {
+	struct fb_info *info;
+	struct picolcd_fb_cleanup_item *next;
+};
+static struct picolcd_fb_cleanup_item *fb_pending;
+static DEFINE_SPINLOCK(fb_pending_lock);
+
+static void picolcd_fb_do_cleanup(struct work_struct *data)
+{
+	struct picolcd_fb_cleanup_item *item;
+	unsigned long flags;
+
+	do {
+		spin_lock_irqsave(&fb_pending_lock, flags);
+		item = fb_pending;
+		fb_pending = item ? item->next : NULL;
+		spin_unlock_irqrestore(&fb_pending_lock, flags);
+
+		if (item) {
+			u8 *fb = (u8 *)item->info->fix.smem_start;
+			/* make sure we do not race against fb core when
+			 * releasing */
+			mutex_lock(&item->info->lock);
+			mutex_unlock(&item->info->lock);
+			framebuffer_release(item->info);
+			vfree(fb);
+		}
+	} while (item);
+}
+
+static DECLARE_WORK(picolcd_fb_cleanup, picolcd_fb_do_cleanup);
+
+static int picolcd_fb_open(struct fb_info *info, int u)
+{
+	u32 *ref_cnt = info->pseudo_palette;
+	ref_cnt--;
+
+	(*ref_cnt)++;
+	return 0;
+}
+
+static int picolcd_fb_release(struct fb_info *info, int u)
+{
+	u32 *ref_cnt = info->pseudo_palette;
+	ref_cnt--;
+
+	(*ref_cnt)++;
+	if (!*ref_cnt) {
+		unsigned long flags;
+		struct picolcd_fb_cleanup_item *item = (struct picolcd_fb_cleanup_item *)ref_cnt;
+		item--;
+		spin_lock_irqsave(&fb_pending_lock, flags);
+		item->next = fb_pending;
+		fb_pending = item;
+		spin_unlock_irqrestore(&fb_pending_lock, flags);
+		schedule_work(&picolcd_fb_cleanup);
+	}
+	return 0;
+}
+
+/* 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_open      = picolcd_fb_open,
+	.fb_release   = picolcd_fb_release,
+	.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,
+	.fb_check_var = picolcd_fb_check_var,
+	.fb_set_par   = picolcd_set_par,
+};
+
+
+/* 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" sysfs 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 i, fb_update_rate = data->fb_update_rate;
+	size_t ret = 0;
+
+	for (i = 1; i <= PICOLCDFB_UPDATE_RATE_LIMIT; i++)
+		if (ret >= PAGE_SIZE)
+			break;
+		else if (i == fb_update_rate)
+			ret += snprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i);
+		else
+			ret += snprintf(buf+ret, PAGE_SIZE-ret, "%u ", i);
+	if (ret > 0)
+		buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n';
+	return ret;
+}
+
+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);
+
+/* initialize Framebuffer device */
+int picolcd_init_framebuffer(struct picolcd_data *data)
+{
+	struct device *dev = &data->hdev->dev;
+	struct fb_info *info = NULL;
+	int i, error = -ENOMEM;
+	u8 *fb_vbitmap = NULL;
+	u8 *fb_bitmap  = NULL;
+	u32 *palette;
+
+	fb_bitmap = vmalloc(PICOLCDFB_SIZE*8);
+	if (fb_bitmap == NULL) {
+		dev_err(dev, "can't get a free page for framebuffer\n");
+		goto err_nomem;
+	}
+
+	fb_vbitmap = kmalloc(PICOLCDFB_SIZE, GFP_KERNEL);
+	if (fb_vbitmap == NULL) {
+		dev_err(dev, "can't alloc vbitmap image buffer\n");
+		goto err_nomem;
+	}
+
+	data->fb_update_rate = PICOLCDFB_UPDATE_RATE_DEFAULT;
+	data->fb_defio = picolcd_fb_defio;
+	/* The extra memory is:
+	 * - struct picolcd_fb_cleanup_item
+	 * - u32 for ref_count
+	 * - 256*u32 for pseudo_palette
+	 */
+	info = framebuffer_alloc(257 * sizeof(u32) + sizeof(struct picolcd_fb_cleanup_item), dev);
+	if (info == NULL) {
+		dev_err(dev, "failed to allocate a framebuffer\n");
+		goto err_nomem;
+	}
+
+	palette  = info->par + sizeof(struct picolcd_fb_cleanup_item);
+	*palette = 1;
+	palette++;
+	for (i = 0; i < 256; i++)
+		palette[i] = i > 0 && i < 16 ? 0xff : 0;
+	info->pseudo_palette = palette;
+	info->fbdefio = &data->fb_defio;
+	info->screen_base = (char __force __iomem *)fb_bitmap;
+	info->fbops = &picolcdfb_ops;
+	info->var = picolcdfb_var;
+	info->fix = picolcdfb_fix;
+	info->fix.smem_len   = PICOLCDFB_SIZE*8;
+	info->fix.smem_start = (unsigned long)fb_bitmap;
+	info->par = data;
+	info->flags = FBINFO_FLAG_DEFAULT;
+
+	data->fb_vbitmap = fb_vbitmap;
+	data->fb_bitmap  = fb_bitmap;
+	data->fb_bpp     = picolcdfb_var.bits_per_pixel;
+	error = picolcd_fb_reset(data, 1);
+	if (error) {
+		dev_err(dev, "failed to configure display\n");
+		goto err_cleanup;
+	}
+	error = device_create_file(dev, &dev_attr_fb_update_rate);
+	if (error) {
+		dev_err(dev, "failed to create sysfs attributes\n");
+		goto err_cleanup;
+	}
+	fb_deferred_io_init(info);
+	data->fb_info    = info;
+	error = register_framebuffer(info);
+	if (error) {
+		dev_err(dev, "failed to register framebuffer\n");
+		goto err_sysfs;
+	}
+	/* schedule first output of framebuffer */
+	data->fb_force = 1;
+	schedule_delayed_work(&info->deferred_work, 0);
+	return 0;
+
+err_sysfs:
+	fb_deferred_io_cleanup(info);
+	device_remove_file(dev, &dev_attr_fb_update_rate);
+err_cleanup:
+	data->fb_vbitmap = NULL;
+	data->fb_bitmap  = NULL;
+	data->fb_bpp     = 0;
+	data->fb_info    = NULL;
+
+err_nomem:
+	framebuffer_release(info);
+	vfree(fb_bitmap);
+	kfree(fb_vbitmap);
+	return error;
+}
+
+void picolcd_exit_framebuffer(struct picolcd_data *data)
+{
+	struct fb_info *info = data->fb_info;
+	u8 *fb_vbitmap = data->fb_vbitmap;
+
+	if (!info)
+		return;
+
+	device_remove_file(&data->hdev->dev, &dev_attr_fb_update_rate);
+	unregister_framebuffer(info);
+	data->fb_vbitmap = NULL;
+	data->fb_bitmap  = NULL;
+	data->fb_bpp     = 0;
+	data->fb_info    = NULL;
+	kfree(fb_vbitmap);
+}
+
+void picolcd_fb_unload()
+{
+	flush_work_sync(&picolcd_fb_cleanup);
+	WARN_ON(fb_pending);
+}
diff --git a/drivers/hid/hid-picolcd_lcd.c b/drivers/hid/hid-picolcd_lcd.c
new file mode 100644
index 00000000000..64a067fc837
--- /dev/null
+++ b/drivers/hid/hid-picolcd_lcd.c
@@ -0,0 +1,106 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2012 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, 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 "usbhid/usbhid.h"
+#include <linux/usb.h>
+
+#include <linux/fb.h>
+#include <linux/lcd.h>
+
+#include "hid-picolcd.h"
+
+/*
+ * lcd class device
+ */
+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);
+	unsigned long flags;
+
+	if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
+		return -ENODEV;
+
+	data->lcd_contrast = contrast & 0x0ff;
+	spin_lock_irqsave(&data->lock, flags);
+	hid_set_field(report->field[0], 0, data->lcd_contrast);
+	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
+	spin_unlock_irqrestore(&data->lock, flags);
+	return 0;
+}
+
+static int picolcd_check_lcd_fb(struct lcd_device *ldev, struct fb_info *fb)
+{
+	return fb && fb == picolcd_fbinfo((struct picolcd_data *)lcd_get_data(ldev));
+}
+
+static struct lcd_ops picolcd_lcdops = {
+	.get_contrast   = picolcd_get_contrast,
+	.set_contrast   = picolcd_set_contrast,
+	.check_fb       = picolcd_check_lcd_fb,
+};
+
+int picolcd_init_lcd(struct picolcd_data *data, struct hid_report *report)
+{
+	struct device *dev = &data->hdev->dev;
+	struct lcd_device *ldev;
+
+	if (!report)
+		return -ENODEV;
+	if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
+			report->field[0]->report_size != 8) {
+		dev_err(dev, "unsupported CONTRAST report");
+		return -EINVAL;
+	}
+
+	ldev = lcd_device_register(dev_name(dev), dev, data, &picolcd_lcdops);
+	if (IS_ERR(ldev)) {
+		dev_err(dev, "failed to register LCD\n");
+		return PTR_ERR(ldev);
+	}
+	ldev->props.max_contrast = 0x0ff;
+	data->lcd_contrast = 0xe5;
+	data->lcd = ldev;
+	picolcd_set_contrast(ldev, 0xe5);
+	return 0;
+}
+
+void picolcd_exit_lcd(struct picolcd_data *data)
+{
+	struct lcd_device *ldev = data->lcd;
+
+	data->lcd = NULL;
+	if (ldev)
+		lcd_device_unregister(ldev);
+}
+
+int picolcd_resume_lcd(struct picolcd_data *data)
+{
+	if (!data->lcd)
+		return 0;
+	return picolcd_set_contrast(data->lcd, data->lcd_contrast);
+}
+
diff --git a/drivers/hid/hid-picolcd_leds.c b/drivers/hid/hid-picolcd_leds.c
new file mode 100644
index 00000000000..9249c068a48
--- /dev/null
+++ b/drivers/hid/hid-picolcd_leds.c
@@ -0,0 +1,172 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2012 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, 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/hid-debug.h>
+#include <linux/input.h>
+#include "hid-ids.h"
+#include "usbhid/usbhid.h"
+#include <linux/usb.h>
+
+#include <linux/fb.h>
+#include <linux/vmalloc.h>
+#include <linux/backlight.h>
+#include <linux/lcd.h>
+
+#include <linux/leds.h>
+
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+
+#include <linux/completion.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+
+#include "hid-picolcd.h"
+
+
+void picolcd_leds_set(struct picolcd_data *data)
+{
+	struct hid_report *report;
+	unsigned long flags;
+
+	if (!data->led[0])
+		return;
+	report = picolcd_out_report(REPORT_LED_STATE, data->hdev);
+	if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
+		return;
+
+	spin_lock_irqsave(&data->lock, flags);
+	hid_set_field(report->field[0], 0, data->led_state);
+	usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
+	spin_unlock_irqrestore(&data->lock, flags);
+}
+
+static void picolcd_led_set_brightness(struct led_classdev *led_cdev,
+			enum led_brightness value)
+{
+	struct device *dev;
+	struct hid_device *hdev;
+	struct picolcd_data *data;
+	int i, state = 0;
+
+	dev  = led_cdev->dev->parent;
+	hdev = container_of(dev, struct hid_device, dev);
+	data = hid_get_drvdata(hdev);
+	for (i = 0; i < 8; i++) {
+		if (led_cdev != data->led[i])
+			continue;
+		state = (data->led_state >> i) & 1;
+		if (value == LED_OFF && state) {
+			data->led_state &= ~(1 << i);
+			picolcd_leds_set(data);
+		} else if (value != LED_OFF && !state) {
+			data->led_state |= 1 << i;
+			picolcd_leds_set(data);
+		}
+		break;
+	}
+}
+
+static enum led_brightness picolcd_led_get_brightness(struct led_classdev *led_cdev)
+{
+	struct device *dev;
+	struct hid_device *hdev;
+	struct picolcd_data *data;
+	int i, value = 0;
+
+	dev  = led_cdev->dev->parent;
+	hdev = container_of(dev, struct hid_device, dev);
+	data = hid_get_drvdata(hdev);
+	for (i = 0; i < 8; i++)
+		if (led_cdev == data->led[i]) {
+			value = (data->led_state >> i) & 1;
+			break;
+		}
+	return value ? LED_FULL : LED_OFF;
+}
+
+int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report)
+{
+	struct device *dev = &data->hdev->dev;
+	struct led_classdev *led;
+	size_t name_sz = strlen(dev_name(dev)) + 8;
+	char *name;
+	int i, ret = 0;
+
+	if (!report)
+		return -ENODEV;
+	if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
+			report->field[0]->report_size != 8) {
+		dev_err(dev, "unsupported LED_STATE report");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < 8; i++) {
+		led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
+		if (!led) {
+			dev_err(dev, "can't allocate memory for LED %d\n", i);
+			ret = -ENOMEM;
+			goto err;
+		}
+		name = (void *)(&led[1]);
+		snprintf(name, name_sz, "%s::GPO%d", dev_name(dev), i);
+		led->name = name;
+		led->brightness = 0;
+		led->max_brightness = 1;
+		led->brightness_get = picolcd_led_get_brightness;
+		led->brightness_set = picolcd_led_set_brightness;
+
+		data->led[i] = led;
+		ret = led_classdev_register(dev, data->led[i]);
+		if (ret) {
+			data->led[i] = NULL;
+			kfree(led);
+			dev_err(dev, "can't register LED %d\n", i);
+			goto err;
+		}
+	}
+	return 0;
+err:
+	for (i = 0; i < 8; i++)
+		if (data->led[i]) {
+			led = data->led[i];
+			data->led[i] = NULL;
+			led_classdev_unregister(led);
+			kfree(led);
+		}
+	return ret;
+}
+
+void picolcd_exit_leds(struct picolcd_data *data)
+{
+	struct led_classdev *led;
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		led = data->led[i];
+		data->led[i] = NULL;
+		if (!led)
+			continue;
+		led_classdev_unregister(led);
+		kfree(led);
+	}
+}
+
+