From: Lars-Peter Clausen <lars@metafoo.de>
Date: Fri, 5 Mar 2010 04:21:41 +0000 (+0000)
Subject: Add support for the n516
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=01ed21fc16e8068c7d230945983a38a43570e6c3;p=openwrt%2Fstaging%2Flinusw.git

Add support for the n516

SVN-Revision: 19987
---

diff --git a/target/linux/xburst/files-2.6.32/arch/mips/include/asm/mach-jz4740/board-n516.h b/target/linux/xburst/files-2.6.32/arch/mips/include/asm/mach-jz4740/board-n516.h
new file mode 100644
index 0000000000..cbe6544778
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/arch/mips/include/asm/mach-jz4740/board-n516.h
@@ -0,0 +1,39 @@
+/*
+ *  linux/include/asm-mips/mach-jz4740/board-n516.h
+ *
+ *  JZ4730-based N516 board definition.
+ *
+ *  Copyright (C) 2009, Yauhen Kharuzhy <jekhor@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __ASM_JZ4740_N516_H__
+#define __ASM_JZ4740_N516_H__
+
+#include <asm/mach-jz4740/gpio.h>
+
+/*
+ * GPIO
+ */
+#define GPIO_SD_VCC_EN_N	JZ_GPIO_PORTD(17)
+#define GPIO_SD_CD_N		JZ_GPIO_PORTD(7)
+#define GPIO_SD_WP		JZ_GPIO_PORTD(15)
+#define GPIO_USB_DETECT		JZ_GPIO_PORTD(19)
+#define GPIO_CHARG_STAT_N	JZ_GPIO_PORTD(16)
+#define GPIO_LED_ENABLE       	JZ_GPIO_PORTD(28)
+#define GPIO_LPC_INT		JZ_GPIO_PORTD(14)
+#define GPIO_HPHONE_DETECT	JZ_GPIO_PORTD(20)
+#define GPIO_SPEAKER_ENABLE	JZ_GPIO_PORTD(21)
+
+/* Display */
+#define GPIO_DISPLAY_RST_L	JZ_GPIO_PORTB(18)
+#define GPIO_DISPLAY_RDY	JZ_GPIO_PORTB(17)
+#define GPIO_DISPLAY_STBY	JZ_GPIO_PORTC(22)
+#define GPIO_DISPLAY_ERR	JZ_GPIO_PORTC(23)
+#define GPIO_DISPLAY_OFF_N	JZ_GPIO_PORTD(1)
+
+#endif /* __ASM_JZ4740_N516_H__ */
diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/Kconfig b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/Kconfig
index 015e0560d5..71d35f7a09 100644
--- a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/Kconfig
+++ b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/Kconfig
@@ -8,6 +8,11 @@ config JZ4740_QI_LB60
 	select DMA_NONCOHERENT
 	select SOC_JZ4740
 
+config JZ4740_N516
+	bool "Hanvon n516 eBook reader"
+	select DMA_NONCOHERENT
+	select SOC_JZ4740
+
 config JZ4740_N526
 	bool "Hanvon n526 eBook reader"
 	select DMA_NONCOHERENT
diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/Makefile b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/Makefile
index b61f5cf8cc..f298174e5a 100644
--- a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/Makefile
+++ b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/Makefile
@@ -12,9 +12,10 @@ obj-$(CONFIG_DEBUG_FS) += clock-debugfs.o
 # board specific support
 
 obj-$(CONFIG_JZ4740_QI_LB60)	+= board-qi_lb60.o
+obj-$(CONFIG_JZ4740_N516)	+= board-n516.o board-n516-display.o
 obj-$(CONFIG_JZ4740_N526)	+= board-n526.o
 
 # PM support
 
-obj-$(CONFIG_PM)         +=pm.o
+obj-$(CONFIG_PM)         += pm.o
 
diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/board-n516-display.c b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/board-n516-display.c
new file mode 100644
index 0000000000..a0485da204
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/board-n516-display.c
@@ -0,0 +1,395 @@
+/*
+ * board-n516-display.c -- Platform device for N516 display
+ *
+ * Copyright (C) 2009, Yauhen Kharuzhy <jekhor@gmail.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/jz4740_fb.h>
+
+#include <asm/mach-jz4740/platform.h>
+#include <asm/mach-jz4740/board-n516.h>
+
+#include <video/metronomefb.h>
+#include <linux/console.h>
+
+extern struct platform_device jz_lcd_device;
+
+static struct fb_videomode n516_fb_modes[] = {
+	[0] = {
+		.name		= "Metronome 800x600",
+		.refresh	= 50,
+		.xres		= 400,
+		.yres		= 624,
+		.hsync_len	= 31,
+		.vsync_len	= 23,
+		.right_margin	= 31,
+		.left_margin	= 5,
+		.upper_margin	= 1,
+		.lower_margin	= 2,
+		.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	},
+};
+
+static struct jz4740_fb_platform_data n516_fb_pdata = {
+	.num_modes	= ARRAY_SIZE(n516_fb_modes),
+	.modes		= n516_fb_modes,
+	.bpp		= 16,
+	.lcd_type	= JZ_LCD_TYPE_GENERIC_16_BIT,
+};
+
+struct n516_board_info {
+	uint8_t *metromem;
+	size_t wfm_size;
+	struct fb_info *host_fbinfo; /* the host LCD controller's fbi */
+	unsigned int fw;
+	unsigned int fh;
+};
+
+static struct platform_device *n516_device;
+static struct n516_board_info n516_board_info;
+
+static int metronome_gpios[] = {
+	GPIO_DISPLAY_STBY,
+	GPIO_DISPLAY_RST_L,
+	GPIO_DISPLAY_RDY,
+	GPIO_DISPLAY_ERR,
+/*	GPIO_DISPLAY_OFF,*/
+};
+
+static const char *metronome_gpio_names[] = {
+	"Metronome STDBY",
+	"Metronome RST",
+	"Metronome RDY",
+	"Metronome ERR",
+/*	"Metronone OFF",*/
+};
+
+static int n516_enable_hostfb(bool enable)
+{
+	int ret;
+	int blank = enable ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
+
+	acquire_console_sem();
+	ret = fb_blank(n516_board_info.host_fbinfo, blank);
+	release_console_sem();
+
+	return ret;
+}
+
+static int n516_init_metronome_gpios(struct metronomefb_par *par)
+{
+	int i;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(metronome_gpios); ++i) {
+		ret = gpio_request(metronome_gpios[i], metronome_gpio_names[i]);
+		if (ret)
+			goto err;
+	}
+
+	gpio_direction_output(GPIO_DISPLAY_OFF, 0);
+	gpio_direction_output(GPIO_DISPLAY_RST_L, 0);
+	gpio_direction_output(GPIO_DISPLAY_STBY, 0);
+	gpio_direction_input(GPIO_DISPLAY_RDY);
+	gpio_direction_input(GPIO_DISPLAY_ERR);
+
+	return 0;
+err:
+	for (--i; i >= 0; --i)
+		gpio_free(metronome_gpios[i]);
+
+	return ret;
+}
+
+static int n516_share_video_mem(struct fb_info *info)
+{
+	int ret;
+
+	dev_dbg(&n516_device->dev, "ENTER %s\n", __func__);
+	dev_dbg(&n516_device->dev, "%s, info->var.xres = %u, info->var.yres = %u\n", __func__, info->var.xres, info->var.yres);
+	/* rough check if this is our desired fb and not something else */
+	if ((info->var.xres != n516_fb_pdata.modes[0].xres)
+		|| (info->var.yres != n516_fb_pdata.modes[0].yres))
+		return 0;
+
+	/* we've now been notified that we have our new fb */
+	n516_board_info.metromem = info->screen_base;
+	n516_board_info.host_fbinfo = info;
+
+	n516_enable_hostfb(false);
+	/* try to refcount host drv since we are the consumer after this */
+	if (!try_module_get(info->fbops->owner))
+		return -ENODEV;
+
+	/* this _add binds metronomefb to n516. metronomefb refcounts n516 */
+	ret = platform_device_add(n516_device);
+
+	if (ret) {
+		platform_device_put(n516_device);
+		return ret;
+	}
+
+	/* request our platform independent driver */
+	request_module("metronomefb");
+
+	return 0;
+}
+
+static int n516_unshare_video_mem(struct fb_info *info)
+{
+	dev_dbg(&n516_device->dev, "ENTER %s\n", __func__);
+
+	if (info != n516_board_info.host_fbinfo)
+		return 0;
+
+	module_put(n516_board_info.host_fbinfo->fbops->owner);
+	return 0;
+}
+
+static int n516_fb_notifier_callback(struct notifier_block *self,
+				 unsigned long event, void *data)
+{
+	struct fb_event *evdata = data;
+	struct fb_info *info = evdata->info;
+
+	dev_dbg(&n516_device->dev, "ENTER %s\n", __func__);
+
+	if (event == FB_EVENT_FB_REGISTERED)
+		return n516_share_video_mem(info);
+	else if (event == FB_EVENT_FB_UNREGISTERED)
+		return n516_unshare_video_mem(info);
+
+	return 0;
+}
+
+static struct notifier_block n516_fb_notif = {
+	.notifier_call = n516_fb_notifier_callback,
+};
+
+/* this gets called as part of our init. these steps must be done now so
+ * that we can use set_pxa_fb_info */
+static void __init n516_presetup_fb(void)
+{
+	int padding_size;
+	int totalsize;
+
+	/* the frame buffer is divided as follows:
+	command | CRC | padding
+	16kb waveform data | CRC | padding
+	image data | CRC
+	*/
+
+	n516_board_info.fw = 800;
+	n516_board_info.fh = 624;
+
+	/* waveform must be 16k + 2 for checksum */
+	n516_board_info.wfm_size = roundup(16*1024 + 2, n516_board_info.fw);
+
+	padding_size = PAGE_SIZE + (4 * n516_board_info.fw);
+
+	/* total is 1 cmd , 1 wfm, padding and image */
+	totalsize = n516_board_info.fw + n516_board_info.wfm_size;
+	totalsize += padding_size + (n516_board_info.fw*n516_board_info.fh);
+
+	/* save this off because we're manipulating fw after this and
+	 * we'll need it when we're ready to setup the framebuffer */
+
+	/* the reason we do this adjustment is because we want to acquire
+	 * more framebuffer memory without imposing custom awareness on the
+	 * underlying driver */
+	n516_fb_pdata.modes[0].yres = DIV_ROUND_UP(totalsize, n516_board_info.fw);
+
+	jz4740_framebuffer_device.dev.platform_data = &n516_fb_pdata;
+	platform_device_register(&jz4740_framebuffer_device);
+}
+
+/* this gets called by metronomefb as part of its init, in our case, we
+ * have already completed initial framebuffer init in presetup_fb so we
+ * can just setup the fb access pointers */
+static int n516_setup_fb(struct metronomefb_par *par)
+{
+	/* metromem was set up by the notifier in share_video_mem so now
+	 * we can use its value to calculate the other entries */
+	par->metromem_cmd = (struct metromem_cmd *) n516_board_info.metromem;
+	par->metromem_wfm = n516_board_info.metromem + n516_board_info.fw;
+	par->metromem_img = par->metromem_wfm + n516_board_info.wfm_size;
+	par->metromem_img_csum = (u16 *) (par->metromem_img + (n516_board_info.fw * n516_board_info.fh));
+	par->metromem_dma = n516_board_info.host_fbinfo->fix.smem_start;
+
+	return 0;
+}
+
+static int n516_get_panel_type(void)
+{
+	return 5;
+}
+
+static irqreturn_t n516_handle_irq(int irq, void *dev_id)
+{
+	struct metronomefb_par *par = dev_id;
+
+	dev_dbg(&par->pdev->dev, "Metronome IRQ! RDY=%d\n", 	gpio_get_value(GPIO_DISPLAY_RDY));
+	wake_up_all(&par->waitq);
+
+	return IRQ_HANDLED;
+}
+
+static void n516_power_ctl(struct metronomefb_par *par, int cmd)
+{
+	switch (cmd) {
+	case METRONOME_POWER_OFF:
+		gpio_set_value(GPIO_DISPLAY_OFF, 1);
+		n516_enable_hostfb(false);
+		break;
+	case METRONOME_POWER_ON:
+		gpio_set_value(GPIO_DISPLAY_OFF, 0);
+		n516_enable_hostfb(true);
+		break;
+	}
+}
+
+static int n516_get_rdy(struct metronomefb_par *par)
+{
+	return gpio_get_value(GPIO_DISPLAY_RDY);
+}
+
+static int n516_get_err(struct metronomefb_par *par)
+{
+	return gpio_get_value(GPIO_DISPLAY_ERR);
+}
+
+static int n516_setup_irq(struct fb_info *info)
+{
+	int ret;
+
+	dev_dbg(&n516_device->dev, "ENTER %s\n", __func__);
+
+	ret = request_irq(gpio_to_irq(GPIO_DISPLAY_RDY), n516_handle_irq,
+				IRQF_TRIGGER_RISING,
+				"n516", info->par);
+	if (ret)
+		dev_err(&n516_device->dev, "request_irq failed: %d\n", ret);
+
+	return ret;
+}
+
+static void n516_set_rst(struct metronomefb_par *par, int state)
+{
+	dev_dbg(&n516_device->dev, "ENTER %s, RDY=%d\n", __func__, gpio_get_value(GPIO_DISPLAY_RDY));
+	if (state)
+		gpio_set_value(GPIO_DISPLAY_RST_L, 1);
+	else
+		gpio_set_value(GPIO_DISPLAY_RST_L, 0);
+}
+
+static void n516_set_stdby(struct metronomefb_par *par, int state)
+{
+	dev_dbg(&n516_device->dev, "ENTER %s, RDY=%d\n", __func__, gpio_get_value(GPIO_DISPLAY_RDY));
+	if (state)
+		gpio_set_value(GPIO_DISPLAY_STBY, 1);
+	else
+		gpio_set_value(GPIO_DISPLAY_STBY, 0);
+}
+
+static int n516_wait_event(struct metronomefb_par *par)
+{
+	unsigned long timeout = jiffies + HZ / 20;
+
+	dev_dbg(&n516_device->dev, "ENTER1 %s, RDY=%d\n",
+			__func__, gpio_get_value(GPIO_DISPLAY_RDY));
+	while (n516_get_rdy(par) && time_before(jiffies, timeout))
+		schedule();
+
+	dev_dbg(&n516_device->dev, "ENTER2 %s, RDY=%d\n",
+			__func__, gpio_get_value(GPIO_DISPLAY_RDY));
+	return wait_event_timeout(par->waitq,
+			n516_get_rdy(par), HZ * 2) ? 0 : -EIO;
+}
+
+static int n516_wait_event_intr(struct metronomefb_par *par)
+{
+	unsigned long timeout = jiffies + HZ/20;
+
+	dev_dbg(&n516_device->dev, "ENTER1 %s, RDY=%d\n",
+			__func__, gpio_get_value(GPIO_DISPLAY_RDY));
+	while (n516_get_rdy(par) && time_before(jiffies, timeout))
+		schedule();
+
+	dev_dbg(&n516_device->dev, "ENTER2 %s, RDY=%d\n",
+			__func__, gpio_get_value(GPIO_DISPLAY_RDY));
+	return wait_event_interruptible_timeout(par->waitq,
+					n516_get_rdy(par), HZ * 2) ? 0 : -EIO;
+}
+
+static void n516_cleanup(struct metronomefb_par *par)
+{
+	int i;
+
+	free_irq(gpio_to_irq(GPIO_DISPLAY_RDY), par);
+	for (i = 0; i < ARRAY_SIZE(metronome_gpios); ++i)
+		gpio_free(metronome_gpios[i]);
+}
+
+static struct metronome_board n516_board __initdata = {
+	.owner			= THIS_MODULE,
+	.power_ctl		= n516_power_ctl,
+	.setup_irq		= n516_setup_irq,
+	.setup_io		= n516_init_metronome_gpios,
+	.setup_fb		= n516_setup_fb,
+	.set_rst		= n516_set_rst,
+	.get_err		= n516_get_err,
+	.get_rdy		= n516_get_rdy,
+	.set_stdby		= n516_set_stdby,
+	.met_wait_event		= n516_wait_event,
+	.met_wait_event_intr	= n516_wait_event_intr,
+	.get_panel_type		= n516_get_panel_type,
+	.cleanup		= n516_cleanup,
+};
+
+static int __init n516_init(void)
+{
+	int ret;
+
+	/* Keep the metronome off, until its driver is loaded */
+	ret = gpio_request(GPIO_DISPLAY_OFF, "Display off");
+	if (ret)
+		return ret;
+
+	gpio_direction_output(GPIO_DISPLAY_OFF, 1);
+
+	/* before anything else, we request notification for any fb
+	 * creation events */
+	fb_register_client(&n516_fb_notif);
+
+	n516_device = platform_device_alloc("metronomefb", -1);
+	if (!n516_device)
+		return -ENOMEM;
+
+	/* the n516_board that will be seen by metronomefb is a copy */
+	platform_device_add_data(n516_device, &n516_board,
+					sizeof(n516_board));
+
+	n516_presetup_fb();
+
+	return 0;
+}
+module_init(n516_init);
+
+MODULE_DESCRIPTION("board driver for n516 display");
+MODULE_AUTHOR("Yauhen Kharuzhy");
+MODULE_LICENSE("GPL");
diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/board-n516.c b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/board-n516.c
new file mode 100644
index 0000000000..0e146ac84d
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/board-n516.c
@@ -0,0 +1,201 @@
+/*
+ * linux/arch/mips/jz4740/board-516.c
+ *
+ * JZ4740 n516 board setup routines.
+ *
+ * Copyright (c) 2009, Yauhen Kharuzhy <jekhor@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mmc/jz4740_mmc.h>
+#include <linux/mtd/jz4740_nand.h>
+#include <linux/leds.h>
+
+#include <linux/power_supply.h>
+#include <linux/power/gpio-charger.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-gpio.h>
+
+#include <asm/mach-jz4740/board-n516.h>
+#include <asm/mach-jz4740/platform.h>
+
+#include "clock.h"
+
+static long n516_panic_blink(long time)
+{
+	gpio_set_value(GPIO_LED_ENABLE, 1);
+	mdelay(200);
+	gpio_set_value(GPIO_LED_ENABLE, 0);
+	mdelay(200);
+
+	return 400;
+}
+
+static void __init board_gpio_setup(void)
+{
+/*	jz_gpio_enable_pullup(JZ_GPIO_PORTD(23));
+	jz_gpio_enable_pullup(JZ_GPIO_PORTD(24));*/
+}
+
+static struct i2c_gpio_platform_data n516_i2c_pdata = {
+	.sda_pin = JZ_GPIO_PORTD(23),
+	.scl_pin = JZ_GPIO_PORTD(24),
+	.udelay = 2,
+	.timeout = 3 * HZ,
+};
+
+static struct platform_device n516_i2c_device = {
+	.name = "i2c-gpio",
+	.id = -1,
+	.dev = {
+		.platform_data = &n516_i2c_pdata,
+	},
+};
+
+static const struct i2c_board_info n516_i2c_board_info[] = {
+	{
+		.type		= "LPC524",
+		.addr		= 0x54,
+	},
+	{
+		.type		= "lm75a",
+		.addr		= 0x48,
+	}
+};
+
+static struct jz4740_mmc_platform_data n516_mmc_pdata = {
+	.gpio_card_detect	= GPIO_SD_CD_N,
+	.card_detect_active_low = 1,
+	.gpio_read_only		= -1,
+	.gpio_power		= GPIO_SD_VCC_EN_N,
+	.power_active_low = 1,
+};
+
+static struct gpio_led n516_leds[] = {
+	{
+		.name = "n516:blue:power",
+		.gpio = GPIO_LED_ENABLE,
+		.default_state = LEDS_GPIO_DEFSTATE_ON,
+		.default_trigger = "nand-disk",
+	}
+};
+
+static struct gpio_led_platform_data n516_leds_pdata = {
+	.leds = n516_leds,
+	.num_leds = ARRAY_SIZE(n516_leds),
+};
+
+static struct platform_device n516_leds_device = {
+	.name = "leds-gpio",
+	.id = -1,
+	.dev = {
+		.platform_data = &n516_leds_pdata,
+	},
+};
+
+static struct mtd_partition n516_partitions[] = {
+	{ .name = "NAND BOOT partition",
+	  .offset = 0 * 0x100000,
+	  .size = 4 * 0x100000,
+ 	},
+	{ .name = "NAND KERNEL partition",
+	  .offset = 4 * 0x100000,
+	  .size = 4 * 0x100000,
+ 	},
+	{ .name = "NAND ROOTFS partition",
+	  .offset = 8 * 0x100000,
+	  .size = 504 * 0x100000,
+ 	},
+};
+
+static struct nand_ecclayout n516_ecclayout = {
+	.eccbytes = 36,
+	.eccpos = {
+		 6,  7,  8,  9, 10, 11, 12, 13, 14,
+		15, 16, 17, 18, 19, 20, 21, 22, 23,
+		24, 25, 26, 27, 28, 29, 30, 31, 32,
+		33, 34, 35, 36, 37, 38, 39, 40, 41,
+	},
+	.oobfree = {
+		{.offset = 2,
+		 .length = 4},
+		{.offset = 42,
+		 .length = 22}}
+};
+
+static struct jz_nand_platform_data n516_nand_pdata = {
+	.ecc_layout = &n516_ecclayout,
+	.partitions = n516_partitions,
+	.num_partitions = ARRAY_SIZE(n516_partitions),
+	.busy_gpio = 94,
+};
+
+static char *n516_batteries[] = {
+	"n516_battery",
+};
+
+static struct gpio_charger_platform_data n516_charger_pdata = {
+	.name = "usb",
+	.type = POWER_SUPPLY_TYPE_USB,
+	.gpio = GPIO_USB_DETECT,
+	.gpio_active_low = 1,
+	.batteries = n516_batteries,
+	.num_batteries = ARRAY_SIZE(n516_batteries),
+};
+
+static struct platform_device n516_charger_device = {
+	.name = "gpio-charger",
+	.dev = {
+		.platform_data = &n516_charger_pdata,
+	},
+};
+
+static struct platform_device *n516_devices[] __initdata = {
+	&jz4740_nand_device,
+	&n516_leds_device,
+	&jz4740_mmc_device,
+	&jz4740_i2s_device,
+	&jz4740_codec_device,
+	&jz4740_rtc_device,
+	&jz4740_usb_gdt_device,
+	&n516_i2c_device,
+	&n516_charger_device,
+};
+
+struct jz4740_clock_board_data jz4740_clock_bdata = {
+	.ext_rate = 12000000,
+	.rtc_rate = 32768,
+};
+
+extern int jz_gpiolib_init(void);
+
+static int n516_setup_platform(void)
+{
+	if (jz_gpiolib_init())
+		panic("Failed to initalize jz gpio\n");
+
+	jz4740_clock_init();
+	board_gpio_setup();
+
+	panic_blink = n516_panic_blink;
+	i2c_register_board_info(0, n516_i2c_board_info, ARRAY_SIZE(n516_i2c_board_info));
+	jz4740_mmc_device.dev.platform_data = &n516_mmc_pdata;
+	jz4740_nand_device.dev.platform_data = &n516_nand_pdata;
+
+	return platform_add_devices(n516_devices, ARRAY_SIZE(n516_devices));
+}
+arch_initcall(n516_setup_platform);
diff --git a/target/linux/xburst/files-2.6.32/drivers/i2c/chips/n516-lpc.c b/target/linux/xburst/files-2.6.32/drivers/i2c/chips/n516-lpc.c
new file mode 100644
index 0000000000..f612685e6f
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/drivers/i2c/chips/n516-lpc.c
@@ -0,0 +1,491 @@
+/*
+ * board-n516-display.c -- Platform device for N516 display
+ *
+ * Copyright (C) 2009, Yauhen Kharuzhy <jekhor@gmail.com>
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/sched.h>
+#include <linux/pm.h>
+#include <linux/sysctl.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/power_supply.h>
+#include <linux/suspend.h>
+
+#include <linux/i2c.h>
+
+#include <asm/mach-jz4740/irq.h>
+#include <asm/mach-jz4740/gpio.h>
+#include <asm/mach-jz4740/board-n516.h>
+
+
+static int batt_level=0;
+module_param(batt_level, int, 0);
+
+struct n516_lpc_chip {
+	struct i2c_client	*i2c_client;
+	struct input_dev	*input;
+	unsigned int		battery_level;
+	unsigned int		suspending:1, can_sleep:1;
+};
+
+static struct n516_lpc_chip *the_lpc;
+
+struct i2c_device_id n516_lpc_i2c_ids[] = {
+	{"LPC524", 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(i2c, n516_lpc_i2c_ids);
+
+static const unsigned short normal_i2c[] = {0x54, I2C_CLIENT_END};
+
+static const unsigned int n516_lpc_keymap[] = {
+	[0x01] = KEY_4,
+	[0x02] = KEY_3,
+	[0x03] = KEY_2,
+	[0x04] = KEY_1,
+	[0x05] = KEY_0,
+	[0x07] = KEY_9,
+	[0x08] = KEY_8,
+	[0x09] = KEY_7,
+	[0x0a] = KEY_6,
+	[0x0b] = KEY_5,
+	[0x0d] = KEY_PLAYPAUSE,
+	[0x0e] = KEY_MENU,
+	[0x0f] = KEY_SEARCH,
+	[0x10] = KEY_DIRECTION,
+	[0x11] = KEY_SPACE,
+	[0x13] = KEY_ENTER,
+	[0x14] = KEY_UP,
+	[0x15] = KEY_DOWN,
+	[0x16] = KEY_RIGHT,
+	[0x17] = KEY_LEFT,
+	[0x19] = KEY_PAGEDOWN,
+	[0x1a] = KEY_PAGEUP,
+	[0x1c] = KEY_POWER,
+	[0x1d] = KEY_ESC,
+	[0x1e] = KEY_SLEEP,
+/*	[0x1f] = KEY_WAKEUP,*/
+};
+
+static const unsigned int batt_charge[] = {0, 7, 20, 45, 65, 80, 100};
+#define MAX_BAT_LEVEL (ARRAY_SIZE(batt_charge) - 1)
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_1(n516_lpc);
+
+static inline int n516_bat_usb_connected(void)
+{
+	return !gpio_get_value(GPIO_USB_DETECT);
+}
+
+static inline int n516_bat_charging(void)
+{
+	return !gpio_get_value(GPIO_CHARG_STAT_N);
+}
+
+static int n516_bat_get_status(struct power_supply *b)
+{
+	if (n516_bat_usb_connected()) {
+		if (n516_bat_charging())
+			return POWER_SUPPLY_STATUS_CHARGING;
+		else
+			return POWER_SUPPLY_STATUS_FULL;
+	} else {
+		return POWER_SUPPLY_STATUS_DISCHARGING;
+	}
+}
+
+static int n516_bat_get_charge(struct power_supply *b)
+{
+	return batt_charge[the_lpc->battery_level];
+}
+
+static int n516_bat_get_property(struct power_supply *b,
+		enum power_supply_property psp,
+		union power_supply_propval *val)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = n516_bat_get_status(b);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+		val->intval = 100;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
+		val->intval = 0;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_NOW:
+		val->intval = n516_bat_get_charge(b);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static void n516_bat_power_changed(struct power_supply *p)
+{
+	power_supply_changed(p);
+}
+
+static enum power_supply_property n516_bat_properties[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+	POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
+	POWER_SUPPLY_PROP_CHARGE_NOW,
+};
+
+static struct power_supply n516_battery = {
+	.name		= "n516-battery",
+	.get_property	= n516_bat_get_property,
+	.properties	= n516_bat_properties,
+	.num_properties	= ARRAY_SIZE(n516_bat_properties),
+	.external_power_changed = n516_bat_power_changed,
+};
+
+static irqreturn_t n516_bat_charge_irq(int irq, void *dev)
+{
+	struct power_supply *psy = dev;
+
+	dev_dbg(psy->dev, "Battery charging IRQ\n");
+
+	if (n516_bat_usb_connected() && !n516_bat_charging())
+		the_lpc->battery_level = MAX_BAT_LEVEL;
+
+	power_supply_changed(psy);
+
+	return IRQ_HANDLED;
+}
+
+static int n516_lpc_set_normal_mode(struct n516_lpc_chip *chip)
+{
+	struct i2c_client *client = chip->i2c_client;
+	unsigned char val = 0x02;
+	struct i2c_msg msg = {client->addr, client->flags, 1, &val};
+	int ret = 0;
+
+	ret = i2c_transfer(client->adapter, &msg, 1);
+	return ret > 0 ? 0 : ret;
+}
+
+static void n516_key_event(struct n516_lpc_chip *chip, unsigned char keycode)
+{
+	struct i2c_client *client = chip->i2c_client;
+	bool long_press = false;
+
+	if (keycode & 0x40) {
+		keycode &= ~0x40;
+		long_press = true;
+	}
+
+	dev_dbg(&client->dev, "keycode: 0x%02x, long_press: 0x%02x\n", keycode, (unsigned int)long_press);
+
+	if (keycode >= ARRAY_SIZE(n516_lpc_keymap) || n516_lpc_keymap[keycode] == 0)
+		return;
+
+	if (long_press)
+		input_report_key(chip->input, KEY_LEFTALT, 1);
+
+	input_report_key(chip->input, n516_lpc_keymap[keycode], 1);
+	input_sync(chip->input);
+	input_report_key(chip->input, n516_lpc_keymap[keycode], 0);
+
+	if (long_press)
+		input_report_key(chip->input, KEY_LEFTALT, 0);
+	input_sync(chip->input);
+}
+
+
+static void n516_battery_event(struct n516_lpc_chip *chip, unsigned char battery_level)
+{
+	if (battery_level != chip->battery_level) {
+		chip->battery_level = battery_level;
+		power_supply_changed(&n516_battery);
+	}
+}
+
+static irqreturn_t n516_lpc_irq(int irq, void *devid)
+{
+	struct n516_lpc_chip *chip = (struct n516_lpc_chip*)devid;
+	int ret;
+	unsigned char raw_msg;
+	struct i2c_client *client = chip->i2c_client;
+	struct i2c_msg msg = {client->addr, client->flags | I2C_M_RD, 1, &raw_msg};
+
+	ret = i2c_transfer(client->adapter, &msg, 1);
+	if (ret != 1) {
+		dev_dbg(&client->dev, "I2C error: %d\n", ret);
+		return IRQ_HANDLED;
+	}
+
+	dev_dbg(&client->dev, "msg: 0x%02x\n", raw_msg);
+
+	if ((raw_msg & 0x40) < ARRAY_SIZE(n516_lpc_keymap)) {
+		n516_key_event(chip, raw_msg);
+	} else if ((raw_msg >= 0x81) && (raw_msg <= 0x87)) {
+		n516_battery_event(chip, raw_msg - 0x81);
+	} else {
+		n516_lpc_set_normal_mode(chip);
+		dev_warn(&client->dev, "Unkown message: %x\n", raw_msg);
+		ret = i2c_transfer(client->adapter, &msg, 1);
+		if (ret != 1) {
+			dev_dbg(&client->dev, "I2C error: %d\n", ret);
+		} else {
+			dev_warn(&client->dev, "Unkown message part 2: %x\n", raw_msg);
+		}
+
+}
+
+	if (chip->suspending)
+		chip->can_sleep = 0;
+
+	printk("foobar\n");
+
+	return IRQ_HANDLED;
+}
+
+static void n516_lpc_power_off(void)
+{
+	struct i2c_client *client = the_lpc->i2c_client;
+	unsigned char val = 0x01;
+	struct i2c_msg msg = {client->addr, client->flags, 1, &val};
+
+	printk("Issue LPC POWEROFF command...\n");
+	while (1)
+		i2c_transfer(client->adapter, &msg, 1);
+}
+
+static int n516_lpc_detect(struct i2c_client *client, int kind, struct i2c_board_info *info)
+{
+	return 0;
+}
+
+static int n516_lpc_suspend_notifier(struct notifier_block *nb,
+		                                unsigned long event,
+						void *dummy)
+{
+	switch(event) {
+	case PM_SUSPEND_PREPARE:
+		the_lpc->suspending = 1;
+		the_lpc->can_sleep = 1;
+		break;
+	case PM_POST_SUSPEND:
+		the_lpc->suspending = 0;
+		the_lpc->can_sleep = 1;
+		break;
+	default:
+		return NOTIFY_DONE;
+	}
+	return NOTIFY_OK;
+}
+
+static struct notifier_block n516_lpc_notif_block = {
+	.notifier_call = n516_lpc_suspend_notifier,
+};
+
+static int n516_lpc_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+	struct n516_lpc_chip *chip;
+	struct input_dev *input;
+	int ret = 0;
+	int i;
+
+	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	the_lpc = chip;
+	chip->i2c_client = client;
+	if ((batt_level > 0) && (batt_level < ARRAY_SIZE(batt_charge)))
+		chip->battery_level = batt_level;
+	i2c_set_clientdata(client, chip);
+
+	ret = gpio_request(GPIO_LPC_INT, "LPC interrupt request");
+	if (ret) {
+		dev_err(&client->dev, "Unable to reguest LPC INT GPIO\n");
+		goto err_gpio_req_lpcint;
+	}
+
+	ret = gpio_request(GPIO_CHARG_STAT_N, "LPC interrupt request");
+	if (ret) {
+		dev_err(&client->dev, "Unable to reguest CHARG STAT GPIO\n");
+		goto err_gpio_req_chargstat;
+	}
+
+	n516_lpc_set_normal_mode(chip);
+
+	input = input_allocate_device();
+	if (!input) {
+		dev_err(&client->dev, "Unable to allocate input device\n");
+		ret = -ENOMEM;
+		goto err_input_alloc;
+	}
+
+	chip->input = input;
+
+	__set_bit(EV_KEY, input->evbit);
+
+	for (i = 0; i < ARRAY_SIZE(n516_lpc_keymap); i++)
+		__set_bit(n516_lpc_keymap[i], input->keybit);
+
+	__set_bit(KEY_LEFTALT, input->keybit);
+
+	input->name = "n516-keys";
+	input->phys = "n516-keys/input0";
+	input->dev.parent = &client->dev;
+	input->id.bustype = BUS_I2C;
+	input->id.vendor = 0x0001;
+	input->id.product = 0x0001;
+	input->id.version = 0x0100;
+
+	ret = input_register_device(input);
+	if (ret < 0) {
+		dev_err(&client->dev, "Unable to register input device\n");
+		goto err_input_register;
+	}
+
+	ret = power_supply_register(NULL, &n516_battery);
+	if (ret) {
+		dev_err(&client->dev, "Unable to register N516 battery\n");
+		goto err_bat_reg;
+	}
+
+	if (n516_bat_usb_connected() && !n516_bat_charging())
+		the_lpc->battery_level = MAX_BAT_LEVEL;
+
+	ret = request_threaded_irq(gpio_to_irq(GPIO_LPC_INT), NULL, n516_lpc_irq,
+			IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "lpc", chip);
+	if (ret) {
+		dev_err(&client->dev, "request_irq failed: %d\n", ret);
+		goto err_request_lpc_irq;
+	}
+
+	ret = request_irq(gpio_to_irq(GPIO_CHARG_STAT_N), n516_bat_charge_irq,
+				IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, "battery charging", &n516_battery);
+	if (ret) {
+		dev_err(&client->dev, "Unable to claim battery charging IRQ\n");
+		goto err_request_chrg_irq;
+	}
+
+	pm_power_off = n516_lpc_power_off;
+	ret = register_pm_notifier(&n516_lpc_notif_block);
+	if (ret) {
+		dev_err(&client->dev, "Unable to register PM notify block\n");
+		goto err_reg_pm_notifier;
+	}
+
+	device_init_wakeup(&client->dev, 1);
+
+	return 0;
+
+	unregister_pm_notifier(&n516_lpc_notif_block);
+err_reg_pm_notifier:
+	free_irq(gpio_to_irq(GPIO_CHARG_STAT_N), &n516_battery);
+err_request_chrg_irq:
+	free_irq(gpio_to_irq(GPIO_LPC_INT), chip);
+err_request_lpc_irq:
+	power_supply_unregister(&n516_battery);
+err_bat_reg:
+	input_unregister_device(input);
+err_input_register:
+	input_free_device(input);
+err_input_alloc:
+	gpio_free(GPIO_CHARG_STAT_N);
+err_gpio_req_chargstat:
+	gpio_free(GPIO_LPC_INT);
+err_gpio_req_lpcint:
+	i2c_set_clientdata(client, NULL);
+	kfree(chip);
+
+	return ret;
+}
+
+static int n516_lpc_remove(struct i2c_client *client)
+{
+	struct n516_lpc_chip *chip = i2c_get_clientdata(client);
+
+	unregister_pm_notifier(&n516_lpc_notif_block);
+	pm_power_off = NULL;
+	free_irq(gpio_to_irq(GPIO_CHARG_STAT_N), &n516_battery);
+	free_irq(gpio_to_irq(GPIO_LPC_INT), chip);
+	power_supply_unregister(&n516_battery);
+	input_unregister_device(chip->input);
+	gpio_free(GPIO_CHARG_STAT_N);
+	gpio_free(GPIO_LPC_INT);
+	i2c_set_clientdata(client, NULL);
+	kfree(chip);
+
+	return 0;
+}
+
+#if CONFIG_PM
+static int n516_lpc_suspend(struct i2c_client *client, pm_message_t msg)
+{
+	if (!the_lpc->can_sleep)
+		return -EBUSY;
+
+	if (device_may_wakeup(&client->dev))
+		enable_irq_wake(gpio_to_irq(GPIO_LPC_INT));
+
+	return 0;
+}
+
+static int n516_lpc_resume(struct i2c_client *client)
+{
+	if (device_may_wakeup(&client->dev))
+		disable_irq_wake(gpio_to_irq(GPIO_LPC_INT));
+
+	return 0;
+}
+#else
+#define n516_lpc_suspend NULL
+#define n516_lpc_resume NULL
+#endif
+
+static struct i2c_driver n516_lpc_driver = {
+	.class		= I2C_CLASS_HWMON,
+	.driver		= {
+		.name	= "n516-keys",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= n516_lpc_probe,
+	.remove		= __devexit_p(n516_lpc_remove),
+	.detect		= n516_lpc_detect,
+	.id_table	= n516_lpc_i2c_ids,
+	.address_data	= &addr_data,
+	.suspend	= n516_lpc_suspend,
+	.resume		= n516_lpc_resume,
+};
+
+static int n516_lpc_init(void)
+{
+	return i2c_add_driver(&n516_lpc_driver);
+}
+module_init(n516_lpc_init);
+
+static void n516_lpc_exit(void)
+{
+	i2c_del_driver(&n516_lpc_driver);
+}
+module_exit(n516_lpc_exit);
+
+MODULE_AUTHOR("Yauhen Kharuzhy");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Keys and power controller driver for N516");
+MODULE_ALIAS("platform:n516-keys");
diff --git a/target/linux/xburst/files-2.6.32/drivers/video/metronomefb.c b/target/linux/xburst/files-2.6.32/drivers/video/metronomefb.c
new file mode 100644
index 0000000000..0d6a1cf4d9
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/drivers/video/metronomefb.c
@@ -0,0 +1,1229 @@
+/*
+ * linux/drivers/video/metronomefb.c -- FB driver for Metronome controller
+ *
+ * Copyright (C) 2008, Jaya Kumar
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
+ *
+ * This work was made possible by help and equipment support from E-Ink
+ * Corporation. http://support.eink.com/community
+ *
+ * This driver is written to be used with the Metronome display controller.
+ * It is intended to be architecture independent. A board specific driver
+ * must be used to perform all the physical IO interactions. An example
+ * is provided as am200epd.c
+ *
+ */
+
+#define DEBUG
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/list.h>
+#include <linux/firmware.h>
+#include <linux/dma-mapping.h>
+#include <linux/uaccess.h>
+#include <linux/irq.h>
+#include <linux/ctype.h>
+
+#include <video/metronomefb.h>
+
+#include <asm/unaligned.h>
+
+/* Display specific information */
+#define DPY_W 832
+#define DPY_H 622
+
+#define WF_MODE_INIT	0 /* Initialization */
+#define WF_MODE_MU	1 /* Monochrome update */
+#define WF_MODE_GU	2 /* Grayscale update */
+#define WF_MODE_GC	3 /* Grayscale clearing */
+
+static int temp = 25;
+
+/* frame differs from image. frame includes non-visible pixels */
+struct epd_frame {
+	int fw; /* frame width */
+	int fh; /* frame height */
+	u16 config[4];
+	int wfm_size;
+};
+
+static struct epd_frame epd_frame_table[] = {
+	{
+		.fw = 832,
+		.fh = 622,
+		.config = {
+			15 /* sdlew */
+			| 2 << 8 /* sdosz */
+			| 0 << 11 /* sdor */
+			| 0 << 12 /* sdces */
+			| 0 << 15, /* sdcer */
+			42 /* gdspl */
+			| 1 << 8 /* gdr1 */
+			| 1 << 9 /* sdshr */
+			| 0 << 15, /* gdspp */
+			18 /* gdspw */
+			| 0 << 15, /* dispc */
+			599 /* vdlc */
+			| 0 << 11 /* dsi */
+			| 0 << 12, /* dsic */
+		},
+		.wfm_size = 47001,
+	},
+	{
+		.fw = 1088,
+		.fh = 791,
+		.config = {
+			0x0104,
+			0x031f,
+			0x0088,
+			0x02ff,
+		},
+		.wfm_size = 46770,
+	},
+	{
+		.fw = 1200,
+		.fh = 842,
+		.config = {
+			0x0101,
+			0x030e,
+			0x0012,
+			0x0280,
+		},
+		.wfm_size = 46770,
+	},
+	{
+		.fw = 800,
+		.fh = 600,
+		.config = {
+			15 /* sdlew */
+			| 2 << 8 /* sdosz */
+			| 0 << 11 /* sdor */
+			| 0 << 12 /* sdces */
+			| 0 << 15, /* sdcer */
+			42 /* gdspl */
+			| 1 << 8 /* gdr1 */
+			| 1 << 9 /* sdshr */
+			| 0 << 15, /* gdspp */
+			18 /* gdspw */
+			| 0 << 15, /* dispc */
+			599 /* vdlc */
+			| 0 << 11 /* dsi */
+			| 0 << 12, /* dsic */
+		},
+		.wfm_size = 46901,
+	},
+};
+
+static const struct fb_fix_screeninfo metronomefb_fix __devinitdata = {
+	.id =		"metronomefb",
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_STATIC_PSEUDOCOLOR,
+	.xpanstep =	0,
+	.ypanstep =	0,
+	.ywrapstep =	0,
+	.line_length =	DPY_W,
+	.accel =	FB_ACCEL_NONE,
+};
+
+static const struct fb_var_screeninfo metronomefb_var __devinitdata = {
+	.xres		= DPY_W,
+	.yres		= DPY_H,
+	.xres_virtual	= DPY_W,
+	.yres_virtual	= DPY_H,
+	.bits_per_pixel	= 8,
+	.grayscale	= 1,
+	.nonstd		= 1,
+	.red =		{ 4, 3, 0 },
+	.green =	{ 0, 0, 0 },
+	.blue =		{ 0, 0, 0 },
+	.transp =	{ 0, 0, 0 },
+};
+
+/* the waveform structure that is coming from userspace firmware */
+struct waveform_hdr {
+	u8 stuff[32];
+
+	u8 wmta[3];
+	u8 fvsn;
+
+	u8 luts;
+	u8 mc;
+	u8 trc;
+	u8 stuff3;
+
+	u8 endb;
+	u8 swtb;
+	u8 stuff2a[2];
+
+	u8 stuff2b[3];
+	u8 wfm_cs;
+} __attribute__ ((packed));
+
+/* main metronomefb functions */
+static u8 calc_cksum(int start, int end, u8 *mem)
+{
+	u8 tmp = 0;
+	int i;
+
+	for (i = start; i < end; i++)
+		tmp += mem[i];
+
+	return tmp;
+}
+
+static u16 calc_img_cksum(u16 *start, int length)
+{
+	u16 tmp = 0;
+
+	while (length--)
+		tmp += *start++;
+
+	return tmp;
+}
+
+/* here we decode the incoming waveform file and populate metromem */
+static int load_waveform(u8 *mem, size_t size, int m, int t,
+				struct metronomefb_par *par)
+{
+	int tta;
+	int wmta;
+	int trn = 0;
+	int i;
+	unsigned char v;
+	u8 cksum;
+	int cksum_idx;
+	int wfm_idx, owfm_idx;
+	int mem_idx = 0;
+	struct waveform_hdr *wfm_hdr;
+	u8 *metromem = par->metromem_wfm;
+	struct device *dev = &par->pdev->dev;
+	u8 mc, trc;
+	u16 *p;
+	u16 img_cksum;
+
+	dev_dbg(dev, "Loading waveforms, mode %d, temperature %d\n", m, t);
+
+	wfm_hdr = (struct waveform_hdr *) mem;
+
+	if (wfm_hdr->fvsn != 1) {
+		dev_err(dev, "Error: bad fvsn %x\n", wfm_hdr->fvsn);
+		return -EINVAL;
+	}
+	if (wfm_hdr->luts != 0) {
+		dev_err(dev, "Error: bad luts %x\n", wfm_hdr->luts);
+		return -EINVAL;
+	}
+	cksum = calc_cksum(32, 47, mem);
+	if (cksum != wfm_hdr->wfm_cs) {
+		dev_err(dev, "Error: bad cksum %x != %x\n", cksum,
+					wfm_hdr->wfm_cs);
+		return -EINVAL;
+	}
+	mc = wfm_hdr->mc + 1;
+	trc = wfm_hdr->trc + 1;
+
+	for (i = 0; i < 5; i++) {
+		if (*(wfm_hdr->stuff2a + i) != 0) {
+			dev_err(dev, "Error: unexpected value in padding\n");
+			return -EINVAL;
+		}
+	}
+
+	/* calculating trn. trn is something used to index into
+	the waveform. presumably selecting the right one for the
+	desired temperature. it works out the offset of the first
+	v that exceeds the specified temperature */
+	if ((sizeof(*wfm_hdr) + trc) > size)
+		return -EINVAL;
+
+	for (i = sizeof(*wfm_hdr); i <= sizeof(*wfm_hdr) + trc; i++) {
+		if (mem[i] > t) {
+			trn = i - sizeof(*wfm_hdr) - 1;
+			break;
+		}
+	}
+
+	/* check temperature range table checksum */
+	cksum_idx = sizeof(*wfm_hdr) + trc + 1;
+	if (cksum_idx > size)
+		return -EINVAL;
+	cksum = calc_cksum(sizeof(*wfm_hdr), cksum_idx, mem);
+	if (cksum != mem[cksum_idx]) {
+		dev_err(dev, "Error: bad temperature range table cksum"
+				" %x != %x\n", cksum, mem[cksum_idx]);
+		return -EINVAL;
+	}
+
+	/* check waveform mode table address checksum */
+	wmta = get_unaligned_le32(wfm_hdr->wmta) & 0x00FFFFFF;
+	cksum_idx = wmta + m*4 + 3;
+	if (cksum_idx > size)
+		return -EINVAL;
+	cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem);
+	if (cksum != mem[cksum_idx]) {
+		dev_err(dev, "Error: bad mode table address cksum"
+				" %x != %x\n", cksum, mem[cksum_idx]);
+		return -EINVAL;
+	}
+
+	/* check waveform temperature table address checksum */
+	tta = get_unaligned_le32(mem + wmta + m * 4) & 0x00FFFFFF;
+	cksum_idx = tta + trn*4 + 3;
+	if (cksum_idx > size)
+		return -EINVAL;
+	cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem);
+	if (cksum != mem[cksum_idx]) {
+		dev_err(dev, "Error: bad temperature table address cksum"
+			" %x != %x\n", cksum, mem[cksum_idx]);
+		return -EINVAL;
+	}
+
+	/* here we do the real work of putting the waveform into the
+	metromem buffer. this does runlength decoding of the waveform */
+	wfm_idx = get_unaligned_le32(mem + tta + trn * 4) & 0x00FFFFFF;
+	owfm_idx = wfm_idx;
+	if (wfm_idx > size)
+		return -EINVAL;
+	while (wfm_idx < size) {
+		unsigned char rl;
+		v = mem[wfm_idx++];
+		if (v == wfm_hdr->swtb) {
+			while (((v = mem[wfm_idx++]) != wfm_hdr->swtb) &&
+				wfm_idx < size)
+				metromem[mem_idx++] = v;
+
+			continue;
+		}
+
+		if (v == wfm_hdr->endb)
+			break;
+
+		rl = mem[wfm_idx++];
+		for (i = 0; i <= rl; i++)
+			metromem[mem_idx++] = v;
+	}
+
+	cksum_idx = wfm_idx;
+	if (cksum_idx > size)
+		return -EINVAL;
+	dev_dbg(dev, "mem_idx = %u\n", mem_idx);
+	cksum = calc_cksum(owfm_idx, cksum_idx, mem);
+	if (cksum != mem[cksum_idx]) {
+		dev_err(dev, "Error: bad waveform data cksum"
+				" %x != %x\n", cksum, mem[cksum_idx]);
+		return -EINVAL;
+	}
+	par->frame_count = (mem_idx/64);
+
+	p = (u16 *)par->metromem_wfm;
+	img_cksum = calc_img_cksum(p, 16384 / 2);
+	p[16384 / 2] = __cpu_to_le16(img_cksum);
+
+	par->current_wf_mode = m;
+	par->current_wf_temp = t;
+
+	return 0;
+}
+
+static int check_err(struct metronomefb_par *par)
+{
+	int res;
+
+	res = par->board->get_err(par);
+	dev_dbg(&par->pdev->dev, "ERR = %d\n", res);
+	return res;
+}
+
+static inline int wait_for_rdy(struct metronomefb_par *par)
+{
+	int res = 0;
+
+	if (!par->board->get_rdy(par))
+		res = par->board->met_wait_event_intr(par);
+
+	return res;
+}
+
+static int metronome_display_cmd(struct metronomefb_par *par)
+{
+	int i;
+	u16 cs;
+	u16 opcode;
+	static u8 borderval;
+	int res;
+
+	res = wait_for_rdy(par);
+	if (res)
+		return res;
+
+	dev_dbg(&par->pdev->dev, "%s: ENTER\n", __func__);
+	/* setup display command
+	we can't immediately set the opcode since the controller
+	will try parse the command before we've set it all up
+	so we just set cs here and set the opcode at the end */
+
+	if (par->metromem_cmd->opcode == 0xCC40)
+		opcode = cs = 0xCC41;
+	else
+		opcode = cs = 0xCC40;
+
+	/* set the args ( 2 bytes ) for display */
+	i = 0;
+	par->metromem_cmd->args[i] = 	0 << 3 /* border update */
+					| (3 << 4)
+//					| ((borderval++ % 4) & 0x0F) << 4
+					| (par->frame_count - 1) << 8;
+	cs += par->metromem_cmd->args[i++];
+
+	/* the rest are 0 */
+	memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
+
+	par->metromem_cmd->csum = cs;
+	par->metromem_cmd->opcode = opcode; /* display cmd */
+
+	return 0;
+
+}
+
+static int __devinit metronome_powerup_cmd(struct metronomefb_par *par)
+{
+	int i;
+	u16 cs;
+	int res;
+
+	dev_dbg(&par->pdev->dev, "%s: ENTER\n", __func__);
+	/* setup power up command */
+	par->metromem_cmd->opcode = 0x1234; /* pwr up pseudo cmd */
+	cs = par->metromem_cmd->opcode;
+
+	/* set pwr1,2,3 to 1024 */
+	for (i = 0; i < 3; i++) {
+//		par->metromem_cmd->args[i] = 1024;
+		par->metromem_cmd->args[i] = 100;
+		cs += par->metromem_cmd->args[i];
+	}
+
+	/* the rest are 0 */
+	memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
+
+	par->metromem_cmd->csum = cs;
+
+	msleep(1);
+	par->board->set_rst(par, 1);
+
+	msleep(1);
+	par->board->set_stdby(par, 1);
+
+	res = par->board->met_wait_event(par);
+	dev_dbg(&par->pdev->dev, "%s: EXIT: %d\n", __func__, res);
+	return res;
+}
+
+static int __devinit metronome_config_cmd(struct metronomefb_par *par)
+{
+	/* setup config command
+	we can't immediately set the opcode since the controller
+	will try parse the command before we've set it all up */
+
+	dev_dbg(&par->pdev->dev, "%s: ENTER\n", __func__);
+	memcpy(par->metromem_cmd->args, epd_frame_table[par->dt].config,
+		sizeof(epd_frame_table[par->dt].config));
+	/* the rest are 0 */
+	memset((u8 *) (par->metromem_cmd->args + 4), 0, (32-4)*2);
+
+	par->metromem_cmd->csum = 0xCC10;
+	par->metromem_cmd->csum += calc_img_cksum(par->metromem_cmd->args, 4);
+	par->metromem_cmd->opcode = 0xCC10; /* config cmd */
+
+	return par->board->met_wait_event(par);
+}
+
+static int __devinit metronome_init_cmd(struct metronomefb_par *par)
+{
+	int i;
+	u16 cs;
+
+	/* setup init command
+	we can't immediately set the opcode since the controller
+	will try parse the command before we've set it all up
+	so we just set cs here and set the opcode at the end */
+
+	dev_dbg(&par->pdev->dev, "%s: ENTER\n", __func__);
+	cs = 0xCC20;
+
+	/* set the args ( 2 bytes ) for init */
+	i = 0;
+	par->metromem_cmd->args[i] = 0x0007;
+	cs += par->metromem_cmd->args[i++];
+
+	/* the rest are 0 */
+	memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
+
+	par->metromem_cmd->csum = cs;
+	par->metromem_cmd->opcode = 0xCC20; /* init cmd */
+
+	return par->board->met_wait_event(par);
+}
+
+static int metronome_bootup(struct metronomefb_par *par)
+{
+	int res;
+
+	res = metronome_powerup_cmd(par);
+	if (res) {
+		dev_err(&par->pdev->dev, "metronomefb: POWERUP cmd failed\n");
+		goto finish;
+	}
+
+	check_err(par);
+	res = metronome_config_cmd(par);
+	if (res) {
+		dev_err(&par->pdev->dev, "metronomefb: CONFIG cmd failed\n");
+		goto finish;
+	}
+	check_err(par);
+
+	res = metronome_init_cmd(par);
+	if (res)
+		dev_err(&par->pdev->dev, "metronomefb: INIT cmd failed\n");
+	check_err(par);
+
+finish:
+	return res;
+}
+
+static int __devinit metronome_init_regs(struct metronomefb_par *par)
+{
+	int res;
+
+	if (par->board->power_ctl)
+		par->board->power_ctl(par, METRONOME_POWER_ON);
+
+	res =  metronome_bootup(par);
+
+	return res;
+}
+
+static void metronomefb_dpy_update(struct metronomefb_par *par, int clear_all)
+{
+	int x, y;
+	int i;
+	u16 cksum = 0;
+	u32 *buf = (u32 __force *)par->info->screen_base;
+	u32 *img = (u32 *)(par->metromem_img);
+	u32 diff;
+	u32 tmp;
+	unsigned int fbsize = par->info->fix.smem_len;
+	int fx = par->info->fix.line_length;
+	int fy = fbsize / fx;
+	int fx_buf = fx / sizeof(*buf);
+	int m;
+	static int is_first_update = 1;
+	static int partial_updates_count = 0;
+	u32 *fxbuckets = par->fxbuckets;
+	u32 *fybuckets = par->fybuckets;
+
+	wait_for_rdy(par);
+
+	memset(fxbuckets, 0, fx_buf * sizeof(*fxbuckets));
+	memset(fybuckets, 0, fy * sizeof(*fybuckets));
+
+	i = 0;
+	for (y = 0; y < fy; y++) {
+		for(x = 0; x < fx_buf; x++, i++) {
+			tmp = (buf[i] << 5) & 0xE0E0E0E0;
+			img[i] &= 0xF0F0F0F0;
+			diff = img[i] ^ tmp;
+
+			fxbuckets[x] |= diff;
+			fybuckets[y] |= diff;
+
+			img[i] = (img[i] >> 4) | tmp;
+			cksum += img[i] & 0x0000ffff;
+			cksum += (img[i] >> 16);
+		}
+	}
+
+	*((u16 *)(par->metromem_img) + fbsize/2) = cksum;
+
+	if (clear_all || is_first_update ||
+		(partial_updates_count == par->partial_autorefresh_interval)) {
+		m = WF_MODE_GC;
+		partial_updates_count = 0;
+	} else {
+		int min_x = fx_buf;
+		int max_x = 0;
+		int min_y = fy;
+		int max_y = 0;
+		int change_count;
+
+		for (x = 0; x < fx_buf; x++)
+			if(fxbuckets[x]) {
+				min_x = x;
+				break;
+			}
+
+		for (x = fx_buf - 1; x >= 0; x--)
+			if(fxbuckets[x]) {
+				max_x = x;
+				break;
+			}
+
+		for (y = 0; y < fy; y++)
+			if(fybuckets[y]) {
+				min_y = y;
+				break;
+			}
+
+		for (y = fy - 1; y >= 0; y--)
+			if(fybuckets[y]) {
+				max_y = y;
+				break;
+			}
+
+		if ((min_x > max_x) || (min_y > max_y))
+			change_count = 0;
+		else
+			change_count = (max_x - min_x + 1) * (max_y - min_y + 1) * sizeof(*buf);
+
+		if (change_count < fbsize / 100 * par->manual_refresh_threshold)
+			m = WF_MODE_GU;
+		else
+			m = WF_MODE_GC;
+
+		dev_dbg(&par->pdev->dev, "min_x = %d, max_x = %d, min_y = %d, max_y = %d\n",
+				min_x, max_x, min_y, max_y);
+		dev_dbg(&par->pdev->dev, "change_count = %u, treshold = %u%% (%u pixels)\n",
+				change_count, par->manual_refresh_threshold,
+				fbsize / 100 * par->manual_refresh_threshold);
+
+		partial_updates_count++;
+	}
+
+	if (m != par->current_wf_mode) {
+		load_waveform((u8 *) par->firmware->data, par->firmware->size,
+				m, par->current_wf_temp, par);
+	}
+
+	for(;;) {
+		if (likely(!check_err(par))) {
+			metronome_display_cmd(par);
+			break;
+		}
+
+		par->board->set_stdby(par, 0);
+		printk("Resetting Metronome\n");
+		par->board->set_rst(par, 0);
+		mdelay(1);
+		if (par->board->power_ctl)
+			par->board->power_ctl(par, METRONOME_POWER_OFF);
+
+		mdelay(1);
+		load_waveform((u8 *) par->firmware->data, par->firmware->size,
+				WF_MODE_GC, par->current_wf_temp, par);
+		if (par->board->power_ctl)
+			par->board->power_ctl(par, METRONOME_POWER_ON);
+		metronome_bootup(par);
+	}
+
+	is_first_update = 0;
+}
+
+/* this is called back from the deferred io workqueue */
+static void metronomefb_dpy_deferred_io(struct fb_info *info,
+				struct list_head *pagelist)
+{
+	struct metronomefb_par *par = info->par;
+
+	/* We will update entire display because we need to change
+	 * 'previous image' field in pixels which was changed at
+	 * previous refresh
+	 */
+	mutex_lock(&par->lock);
+	metronomefb_dpy_update(par, 0);
+	mutex_unlock(&par->lock);
+}
+
+static void metronomefb_fillrect(struct fb_info *info,
+				   const struct fb_fillrect *rect)
+{
+	struct metronomefb_par *par = info->par;
+
+	mutex_lock(&par->lock);
+	sys_fillrect(info, rect);
+	metronomefb_dpy_update(par, 0);
+	mutex_unlock(&par->lock);
+}
+
+static void metronomefb_copyarea(struct fb_info *info,
+				   const struct fb_copyarea *area)
+{
+	struct metronomefb_par *par = info->par;
+
+	mutex_lock(&par->lock);
+	sys_copyarea(info, area);
+	metronomefb_dpy_update(par, 0);
+	mutex_unlock(&par->lock);
+}
+
+static void metronomefb_imageblit(struct fb_info *info,
+				const struct fb_image *image)
+{
+	struct metronomefb_par *par = info->par;
+
+	mutex_lock(&par->lock);
+	sys_imageblit(info, image);
+	metronomefb_dpy_update(par, 0);
+	mutex_unlock(&par->lock);
+}
+
+/*
+ * this is the slow path from userspace. they can seek and write to
+ * the fb. it is based on fb_sys_write
+ */
+static ssize_t metronomefb_write(struct fb_info *info, const char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	struct metronomefb_par *par = info->par;
+	unsigned long p = *ppos;
+	void *dst;
+	int err = 0;
+	unsigned long total_size;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return -EPERM;
+
+	total_size = info->fix.smem_len;
+
+	if (p > total_size)
+		return -EFBIG;
+
+	if (count > total_size) {
+		err = -EFBIG;
+		count = total_size;
+	}
+
+	if (count + p > total_size) {
+		if (!err)
+			err = -ENOSPC;
+
+		count = total_size - p;
+	}
+
+	dst = (void __force *)(info->screen_base + p);
+
+	mutex_lock(&par->lock);
+
+	if (copy_from_user(dst, buf, count))
+		err = -EFAULT;
+
+	if  (!err)
+		*ppos += count;
+
+	metronomefb_dpy_update(par, 0);
+	mutex_unlock(&par->lock);
+
+	return (err) ? err : count;
+}
+
+static struct fb_ops metronomefb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_write	= metronomefb_write,
+	.fb_fillrect	= metronomefb_fillrect,
+	.fb_copyarea	= metronomefb_copyarea,
+	.fb_imageblit	= metronomefb_imageblit,
+};
+
+static struct fb_deferred_io metronomefb_defio = {
+	.delay		= HZ / 4,
+	.deferred_io	= metronomefb_dpy_deferred_io,
+};
+
+static ssize_t metronomefb_defio_delay_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+
+	sprintf(buf, "%lu\n", info->fbdefio->delay * 1000 / HZ);
+	return strlen(buf) + 1;
+}
+
+static ssize_t metronomefb_defio_delay_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t size)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	char *after;
+	unsigned long state = simple_strtoul(buf, &after, 10);
+	size_t count = after - buf;
+	ssize_t ret = -EINVAL;
+
+	if (*after && isspace(*after))
+		count++;
+
+	state = state * HZ / 1000;
+
+	if (!state)
+		state = 1;
+
+	if (count == size) {
+		ret = count;
+		info->fbdefio->delay = state;
+	}
+
+	return ret;
+}
+
+static ssize_t metronomefb_manual_refresh_thr_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	struct metronomefb_par *par = info->par;
+
+	return sprintf(buf, "%u\n", par->manual_refresh_threshold);
+}
+
+static ssize_t metronomefb_manual_refresh_thr_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t size)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	struct metronomefb_par *par = info->par;
+	char *after;
+	unsigned long val = simple_strtoul(buf, &after, 10);
+	size_t count = after - buf;
+	ssize_t ret = -EINVAL;
+
+	if (*after && isspace(*after))
+		count++;
+
+	if (val > 100)
+		return -EINVAL;
+
+
+	if (count == size) {
+		ret = count;
+		par->manual_refresh_threshold = val;
+	}
+
+	return ret;
+}
+
+static ssize_t metronomefb_autorefresh_interval_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	struct metronomefb_par *par = info->par;
+
+	return sprintf(buf, "%u\n", par->partial_autorefresh_interval);
+}
+
+static ssize_t metronomefb_autorefresh_interval_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t size)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	struct metronomefb_par *par = info->par;
+	char *after;
+	unsigned long val = simple_strtoul(buf, &after, 10);
+	size_t count = after - buf;
+	ssize_t ret = -EINVAL;
+
+	if (*after && isspace(*after))
+		count++;
+
+	if (val > 100)
+		return -EINVAL;
+
+
+	if (count == size) {
+		ret = count;
+		par->partial_autorefresh_interval = val;
+	}
+
+	return ret;
+}
+
+static ssize_t metronomefb_temp_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	struct metronomefb_par *par = info->par;
+
+	return sprintf(buf, "%u\n", par->current_wf_temp);
+}
+
+static ssize_t metronomefb_temp_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t size)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	struct metronomefb_par *par = info->par;
+	char *after;
+	unsigned long val = simple_strtoul(buf, &after, 10);
+	size_t count = after - buf;
+	ssize_t ret = -EINVAL;
+
+	if (*after && isspace(*after))
+		count++;
+
+	if (val > 100)
+		return -EINVAL;
+
+
+	if (count == size) {
+		ret = count;
+		if (val != par->current_wf_temp)
+			load_waveform((u8 *) par->firmware->data, par->firmware->size,
+					par->current_wf_mode, val, par);
+	}
+
+	return ret;
+}
+
+DEVICE_ATTR(defio_delay, 0644,
+		metronomefb_defio_delay_show, metronomefb_defio_delay_store);
+DEVICE_ATTR(manual_refresh_threshold, 0644,
+		metronomefb_manual_refresh_thr_show, metronomefb_manual_refresh_thr_store);
+DEVICE_ATTR(temp, 0644,
+		metronomefb_temp_show, metronomefb_temp_store);
+DEVICE_ATTR(autorefresh_interval, 0644,
+		metronomefb_autorefresh_interval_show, metronomefb_autorefresh_interval_store);
+
+
+static int __devinit metronomefb_probe(struct platform_device *dev)
+{
+	struct fb_info *info;
+	struct metronome_board *board;
+	int retval = -ENOMEM;
+	int videomemorysize;
+	unsigned char *videomemory;
+	struct metronomefb_par *par;
+	const struct firmware *fw_entry;
+	int i;
+	int panel_type;
+	int fw, fh;
+	int epd_dt_index;
+
+	/* pick up board specific routines */
+	board = dev->dev.platform_data;
+	if (!board)
+		return -EINVAL;
+
+	/* try to count device specific driver, if can't, platform recalls */
+	if (!try_module_get(board->owner))
+		return -ENODEV;
+
+	info = framebuffer_alloc(sizeof(struct metronomefb_par), &dev->dev);
+	if (!info)
+		goto err;
+
+	/* we have two blocks of memory.
+	info->screen_base which is vm, and is the fb used by apps.
+	par->metromem which is physically contiguous memory and
+	contains the display controller commands, waveform,
+	processed image data and padding. this is the data pulled
+	by the device's LCD controller and pushed to Metronome.
+	the metromem memory is allocated by the board driver and
+	is provided to us */
+
+	panel_type = board->get_panel_type();
+	switch (panel_type) {
+	case 5:
+		epd_dt_index = 3;
+		break;
+	case 6:
+		epd_dt_index = 0;
+		break;
+	case 8:
+		epd_dt_index = 1;
+		break;
+	case 97:
+		epd_dt_index = 2;
+		break;
+	default:
+		dev_err(&dev->dev, "Unexpected panel type. Defaulting to 6\n");
+		epd_dt_index = 0;
+		break;
+	}
+
+	fw = epd_frame_table[epd_dt_index].fw;
+	fh = epd_frame_table[epd_dt_index].fh;
+
+	/* we need to add a spare page because our csum caching scheme walks
+	 * to the end of the page */
+	videomemorysize = PAGE_SIZE + (fw * fh);
+	videomemory = vmalloc(videomemorysize);
+	if (!videomemory)
+		goto err_fb_rel;
+
+	memset(videomemory, 0xff, videomemorysize);
+
+	info->screen_base = (char __force __iomem *)videomemory;
+	info->fbops = &metronomefb_ops;
+
+	info->var = metronomefb_var;
+	info->var.xres = fw;
+	info->var.yres = fh;
+	info->var.xres_virtual = fw;
+	info->var.yres_virtual = fh;
+
+	info->fix = metronomefb_fix;
+	info->fix.smem_len = fw * fh; /* Real size of image area */
+	info->fix.line_length = fw;
+
+	par = info->par;
+	par->info = info;
+	par->board = board;
+	par->dt = epd_dt_index;
+	par->pdev = dev;
+
+	par->fxbuckets = kmalloc((fw / 4 + 1) * sizeof(*par->fxbuckets), GFP_KERNEL);
+	if (!par->fxbuckets)
+		goto err_vfree;
+
+	par->fybuckets = kmalloc(fh * sizeof(*par->fybuckets), GFP_KERNEL);
+	if (!par->fybuckets)
+		goto err_fxbuckets;
+
+	init_waitqueue_head(&par->waitq);
+	par->manual_refresh_threshold = 60;
+	par->partial_autorefresh_interval = 256;
+	mutex_init(&par->lock);
+
+	/* this table caches per page csum values. */
+	par->csum_table = vmalloc(videomemorysize/PAGE_SIZE);
+	if (!par->csum_table)
+		goto err_fybuckets;
+
+	/* the physical framebuffer that we use is setup by
+	 * the platform device driver. It will provide us
+	 * with cmd, wfm and image memory in a contiguous area. */
+	retval = board->setup_fb(par);
+	if (retval) {
+		dev_err(&dev->dev, "Failed to setup fb\n");
+		goto err_csum_table;
+	}
+
+	/* after this point we should have a framebuffer */
+	if ((!par->metromem_wfm) ||  (!par->metromem_img) ||
+		(!par->metromem_dma)) {
+		dev_err(&dev->dev, "fb access failure\n");
+		retval = -EINVAL;
+		goto err_csum_table;
+	}
+
+	info->fix.smem_start = 0;
+
+	/* load the waveform in. assume mode 3, temp 31 for now
+		a) request the waveform file from userspace
+		b) process waveform and decode into metromem */
+	retval = request_firmware(&fw_entry, "metronome.wbf", &dev->dev);
+	if (retval < 0) {
+		dev_err(&dev->dev, "Failed to get waveform\n");
+		goto err_csum_table;
+	}
+
+	retval = load_waveform((u8 *) fw_entry->data, fw_entry->size, WF_MODE_GC, temp,
+				par);
+	if (retval < 0) {
+		dev_err(&dev->dev, "Failed processing waveform\n");
+		goto err_csum_table;
+	}
+	par->firmware = fw_entry;
+
+	retval = board->setup_io(par);
+	if (retval) {
+		dev_err(&dev->dev, "metronomefb: setup_io() failed\n");
+		goto err_csum_table;
+	}
+
+	if (board->setup_irq(info))
+		goto err_csum_table;
+
+	retval = metronome_init_regs(par);
+	if (retval < 0)
+		goto err_free_irq;
+
+	info->flags = FBINFO_FLAG_DEFAULT;
+
+	info->fbdefio = &metronomefb_defio;
+	fb_deferred_io_init(info);
+
+	retval = fb_alloc_cmap(&info->cmap, 8, 0);
+	if (retval < 0) {
+		dev_err(&dev->dev, "Failed to allocate colormap\n");
+		goto err_free_irq;
+	}
+
+	/* set cmap */
+	for (i = 0; i < 8; i++)
+		info->cmap.red[i] = ((2 * i + 1)*(0xFFFF))/16;
+	memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*8);
+	memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*8);
+
+	retval = register_framebuffer(info);
+	if (retval < 0)
+		goto err_cmap;
+
+	platform_set_drvdata(dev, info);
+
+	retval = device_create_file(info->dev, &dev_attr_defio_delay);
+	if (retval)
+		goto err_devattr_defio_delay;
+
+	retval = device_create_file(info->dev, &dev_attr_manual_refresh_threshold);
+	if (retval)
+		goto err_devattr_manual_refresh_thr;
+
+	retval = device_create_file(info->dev, &dev_attr_temp);
+	if (retval)
+		goto err_devattr_temp;
+
+	retval = device_create_file(info->dev, &dev_attr_autorefresh_interval);
+	if (retval)
+		goto err_devattr_autorefresh;
+
+	dev_info(&dev->dev,
+		"fb%d: Metronome frame buffer device, using %dK of video"
+		" memory\n", info->node, videomemorysize >> 10);
+
+	return 0;
+
+	device_remove_file(info->dev, &dev_attr_autorefresh_interval);
+err_devattr_autorefresh:
+	device_remove_file(info->dev, &dev_attr_temp);
+err_devattr_temp:
+	device_remove_file(info->dev, &dev_attr_manual_refresh_threshold);
+err_devattr_manual_refresh_thr:
+	device_remove_file(info->dev, &dev_attr_defio_delay);
+err_devattr_defio_delay:
+	unregister_framebuffer(info);
+err_cmap:
+	fb_dealloc_cmap(&info->cmap);
+err_free_irq:
+	board->cleanup(par);
+err_csum_table:
+	vfree(par->csum_table);
+err_fybuckets:
+	kfree(par->fybuckets);
+err_fxbuckets:
+	kfree(par->fxbuckets);
+err_vfree:
+	vfree(videomemory);
+err_fb_rel:
+	framebuffer_release(info);
+err:
+	module_put(board->owner);
+	return retval;
+}
+
+static int __devexit metronomefb_remove(struct platform_device *dev)
+{
+	struct fb_info *info = platform_get_drvdata(dev);
+
+	if (info) {
+		struct metronomefb_par *par = info->par;
+
+		par->board->set_stdby(par, 0);
+		mdelay(1);
+		if (par->board->power_ctl)
+			par->board->power_ctl(par, METRONOME_POWER_OFF);
+
+		device_remove_file(info->dev, &dev_attr_autorefresh_interval);
+		device_remove_file(info->dev, &dev_attr_temp);
+		device_remove_file(info->dev, &dev_attr_manual_refresh_threshold);
+		device_remove_file(info->dev, &dev_attr_defio_delay);
+		unregister_framebuffer(info);
+		fb_deferred_io_cleanup(info);
+		fb_dealloc_cmap(&info->cmap);
+		par->board->cleanup(par);
+		vfree(par->csum_table);
+		kfree(par->fybuckets);
+		kfree(par->fxbuckets);
+		vfree((void __force *)info->screen_base);
+		module_put(par->board->owner);
+		release_firmware(par->firmware);
+		dev_dbg(&dev->dev, "calling release\n");
+		framebuffer_release(info);
+	}
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int metronomefb_suspend(struct platform_device *pdev, pm_message_t message)
+{
+	struct fb_info *info = platform_get_drvdata(pdev);
+	struct metronomefb_par *par = info->par;
+
+	par->board->set_stdby(par, 0);
+	par->board->set_rst(par, 0);
+	if (par->board->power_ctl)
+		par->board->power_ctl(par, METRONOME_POWER_OFF);
+
+	return 0;
+}
+
+static int metronomefb_resume(struct platform_device *pdev)
+{
+	struct fb_info *info = platform_get_drvdata(pdev);
+	struct metronomefb_par *par = info->par;
+
+	if (par->board->power_ctl)
+		par->board->power_ctl(par, METRONOME_POWER_ON);
+
+	mutex_lock(&par->lock);
+	metronome_bootup(par);
+	mutex_unlock(&par->lock);
+
+	return 0;
+}
+
+#else
+#define metronomefb_suspend NULL
+#define metronomefb_resume NULL
+#endif
+
+
+static struct platform_driver metronomefb_driver = {
+	.driver		= {
+			.owner	= THIS_MODULE,
+			.name	= "metronomefb",
+			},
+	.probe		= metronomefb_probe,
+	.remove		= __devexit_p(metronomefb_remove),
+	.suspend	= metronomefb_suspend,
+	.resume		= metronomefb_resume,
+};
+
+static int __init metronomefb_init(void)
+{
+	return platform_driver_register(&metronomefb_driver);
+}
+
+static void __exit metronomefb_exit(void)
+{
+	platform_driver_unregister(&metronomefb_driver);
+}
+
+module_param(temp, int, 0);
+MODULE_PARM_DESC(temp, "Set current temperature");
+
+module_init(metronomefb_init);
+module_exit(metronomefb_exit);
+
+MODULE_DESCRIPTION("fbdev driver for Metronome controller");
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
diff --git a/target/linux/xburst/files-2.6.32/include/video/metronomefb.h b/target/linux/xburst/files-2.6.32/include/video/metronomefb.h
new file mode 100644
index 0000000000..8c7bdbec70
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/include/video/metronomefb.h
@@ -0,0 +1,67 @@
+/*
+ * metronomefb.h - definitions for the metronome framebuffer driver
+ *
+ * Copyright (C) 2008 by Jaya Kumar
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ */
+
+#ifndef _LINUX_METRONOMEFB_H_
+#define _LINUX_METRONOMEFB_H_
+
+/* command structure used by metronome controller */
+struct metromem_cmd {
+	u16 opcode;
+	u16 args[((64-2)/2)];
+	u16 csum;
+} __attribute__(packed);
+
+/* struct used by metronome. board specific stuff comes from *board */
+struct metronomefb_par {
+	struct metromem_cmd *metromem_cmd;
+	unsigned char *metromem_wfm;
+	unsigned char *metromem_img;
+	u16 *metromem_img_csum;
+	u16 *csum_table;
+	dma_addr_t metromem_dma;
+	const struct firmware *firmware;
+	struct fb_info *info;
+	struct metronome_board *board;
+	struct platform_device *pdev;
+	wait_queue_head_t waitq;
+	u8 frame_count;
+	int extra_size;
+	int current_wf_mode;
+	int current_wf_temp;
+	unsigned int manual_refresh_threshold;
+	unsigned int partial_autorefresh_interval;
+	int dt;
+	u32 *fxbuckets;
+	u32 *fybuckets;
+	struct mutex lock;
+};
+
+#define METRONOME_POWER_OFF	0
+#define METRONOME_POWER_ON	1
+
+/* board specific routines and data */
+struct metronome_board {
+	struct module *owner; /* the platform device */
+	void (*power_ctl)(struct metronomefb_par *, int);
+	void (*set_rst)(struct metronomefb_par *, int);
+	void (*set_stdby)(struct metronomefb_par *, int);
+	int (*get_err)(struct metronomefb_par *);
+	int (*get_rdy)(struct metronomefb_par *);
+	void (*cleanup)(struct metronomefb_par *);
+	int (*met_wait_event)(struct metronomefb_par *);
+	int (*met_wait_event_intr)(struct metronomefb_par *);
+	int (*setup_irq)(struct fb_info *);
+	int (*setup_fb)(struct metronomefb_par *);
+	int (*setup_io)(struct metronomefb_par *);
+	int (*get_panel_type)(void);
+};
+
+#endif
diff --git a/target/linux/xburst/n516/config-2.6.32 b/target/linux/xburst/n516/config-2.6.32
new file mode 100644
index 0000000000..fa44bea3a9
--- /dev/null
+++ b/target/linux/xburst/n516/config-2.6.32
@@ -0,0 +1,25 @@
+CONFIG_FB_DEFERRED_IO=y
+CONFIG_FB_JZ4740=y
+CONFIG_FB_METRONOME=m
+CONFIG_FB_SYS_FOPS=m
+# CONFIG_FRAMEBUFFER_CONSOLE is not set
+CONFIG_HWMON=y
+# CONFIG_HWMON_DEBUG_CHIP is not set
+CONFIG_I2C=y
+CONFIG_I2C_ALGOBIT=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_GPIO=y
+CONFIG_JZ4740_N516=y
+# CONFIG_KEYBOARD_GPIO is not set
+CONFIG_LEDS_GPIO=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_N516_LPC=y
+CONFIG_NEW_LEDS=y
+# CONFIG_REGULATOR_FIXED_VOLTAGE is not set
+# CONFIG_REGULATOR_LP3971 is not set
+# CONFIG_REGULATOR_MAX1586 is not set
+# CONFIG_REGULATOR_TPS65023 is not set
+# CONFIG_REGULATOR_TPS6507X is not set
+CONFIG_SENSORS_LM75=y
+# CONFIG_USB_ARCH_HAS_HCD is not set
+# CONFIG_USB_ARCH_HAS_OHCI is not set
diff --git a/target/linux/xburst/n516/target.mk b/target/linux/xburst/n516/target.mk
new file mode 100644
index 0000000000..82af80dd2b
--- /dev/null
+++ b/target/linux/xburst/n516/target.mk
@@ -0,0 +1,2 @@
+BOARDNAME:=Hanvon N516 e-book reader
+#DEFAULT_PACKAGES += uboot-xburst-n516
diff --git a/target/linux/xburst/patches-2.6.32/800-n526-lpc.patch b/target/linux/xburst/patches-2.6.32/800-n526-lpc.patch
deleted file mode 100644
index df81b64ba3..0000000000
--- a/target/linux/xburst/patches-2.6.32/800-n526-lpc.patch
+++ /dev/null
@@ -1,36 +0,0 @@
-From 806ead1e454a8a5876b777b22ca67187c4749f32 Mon Sep 17 00:00:00 2001
-From: Lars-Peter Clausen <lars@metafoo.de>
-Date: Mon, 11 Jan 2010 04:30:42 +0100
-Subject: [PATCH] /opt/Projects/openwrt/target/linux/xburst/patches-2.6.31/800-n526-lpc.patch
-
----
- drivers/i2c/chips/Kconfig  |    9 +++++++++
- drivers/i2c/chips/Makefile |    1 +
- 2 files changed, 10 insertions(+), 0 deletions(-)
-
---- a/drivers/i2c/chips/Kconfig
-+++ b/drivers/i2c/chips/Kconfig
-@@ -26,4 +26,13 @@ config SENSORS_TSL2550
- 	  This driver can also be built as a module.  If so, the module
- 	  will be called tsl2550.
- 
-+config N526_LPC
-+	tristate "N526 LPC934 coprocessor"
-+	depends on JZ4740_N526
-+	help
-+	  If you say yes here you get support for the N526s NXP LPC934 coprocessor.
-+	  It is used as a keyboard controllor and for power management.
-+
-+	  If you have a N526 you probably want to say Y here.
-+
- endmenu
---- a/drivers/i2c/chips/Makefile
-+++ b/drivers/i2c/chips/Makefile
-@@ -12,6 +12,7 @@
- 
- obj-$(CONFIG_DS1682)		+= ds1682.o
- obj-$(CONFIG_SENSORS_TSL2550)	+= tsl2550.o
-+obj-$(CONFIG_N526_LPC)		+= n526-lpc.o
- 
- ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
- EXTRA_CFLAGS += -DDEBUG
diff --git a/target/linux/xburst/patches-2.6.32/800-n5x6-lpc.patch b/target/linux/xburst/patches-2.6.32/800-n5x6-lpc.patch
new file mode 100644
index 0000000000..169bc84ad5
--- /dev/null
+++ b/target/linux/xburst/patches-2.6.32/800-n5x6-lpc.patch
@@ -0,0 +1,45 @@
+From 806ead1e454a8a5876b777b22ca67187c4749f32 Mon Sep 17 00:00:00 2001
+From: Lars-Peter Clausen <lars@metafoo.de>
+Date: Mon, 11 Jan 2010 04:30:42 +0100
+Subject: [PATCH] /opt/Projects/openwrt/target/linux/xburst/patches-2.6.31/800-n526-lpc.patch
+
+---
+ drivers/i2c/chips/Kconfig  |    9 +++++++++
+ drivers/i2c/chips/Makefile |    1 +
+ 2 files changed, 10 insertions(+), 0 deletions(-)
+
+--- a/drivers/i2c/chips/Kconfig
++++ b/drivers/i2c/chips/Kconfig
+@@ -26,4 +26,21 @@ config SENSORS_TSL2550
+ 	  This driver can also be built as a module.  If so, the module
+ 	  will be called tsl2550.
+ 
++config N516_LPC
++	tristate "N516 keys & power controller"
++	depends on I2C
++	depends on INPUT
++	depends on POWER_SUPPLY
++	help
++	  N516 keyboard & power controller driver
++
++config N526_LPC
++	tristate "N526 LPC934 coprocessor"
++	depends on JZ4740_N526
++	help
++	  If you say yes here you get support for the N526s NXP LPC934 coprocessor.
++	  It is used as a keyboard controllor and for power management.
++
++	  If you have a N526 you probably want to say Y here.
++
+ endmenu
+--- a/drivers/i2c/chips/Makefile
++++ b/drivers/i2c/chips/Makefile
+@@ -12,6 +12,8 @@
+ 
+ obj-$(CONFIG_DS1682)		+= ds1682.o
+ obj-$(CONFIG_SENSORS_TSL2550)	+= tsl2550.o
++obj-$(CONFIG_N516_LPC)		+= n516-lpc.o
++obj-$(CONFIG_N526_LPC)		+= n526-lpc.o
+ 
+ ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
+ EXTRA_CFLAGS += -DDEBUG