From e935508515cc5592d7c80d7f51f21103f73efb2d Mon Sep 17 00:00:00 2001
From: Jaya Kumar <jayakumar.lkml@gmail.com>
Date: Tue, 19 Aug 2008 11:17:55 +0100
Subject: [ARM] 5209/1: metronomefb: changes to use platform framebuffer

These changes are used in order to support the use of the framebuffer
provided by the platform device driver rather than to directly allocate one.
Other changes are cleanup to error handling and order of release.

Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/video/Kconfig | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

(limited to 'drivers/video/Kconfig')

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 70d135e0cc4..6fd4a2f63cf 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -172,11 +172,6 @@ config FB_DEFERRED_IO
 	bool
 	depends on FB
 
-config FB_METRONOME
-	tristate
-	depends on FB
-	depends on FB_DEFERRED_IO
-
 config FB_HECUBA
 	tristate
 	depends on FB
@@ -2041,6 +2036,19 @@ config XEN_FBDEV_FRONTEND
 	  frame buffer driver.  It communicates with a back-end
 	  in another domain.
 
+config FB_METRONOME
+	tristate "E-Ink Metronome/8track controller support"
+	depends on FB
+	select FB_SYS_FILLRECT
+	select FB_SYS_COPYAREA
+	select FB_SYS_IMAGEBLIT
+	select FB_SYS_FOPS
+	select FB_DEFERRED_IO
+	help
+	  This driver implements support for the E-Ink Metronome
+	  controller. The pre-release name for this device was 8track
+	  and could also have been called by some vendors as PVI-nnnn.
+
 source "drivers/video/omap/Kconfig"
 
 source "drivers/video/backlight/Kconfig"
-- 
cgit v1.2.3-70-g09d2


From 922613436ae562a2903698f3a6e16998382a549d Mon Sep 17 00:00:00 2001
From: Jaya Kumar <jayakumar.lkml@gmail.com>
Date: Sun, 17 Aug 2008 05:59:32 +0100
Subject: [ARM] 5200/1: am200epd: use fb notifiers and gpio api

The original am200epd driver was designed with bad assumptions. It
manipulated GPSR/GPLR registers directly. It relied on direct access to the
pxa LCDC registers which have since conflicted with commit
ce4fb7b892a6d6c6a0f87366b26fd834d2923dd7 . This patch moves it into mach-pxa
and overhauls it to use a fb obtained through fb notifiers. It now uses the
generic GPIO api.

Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/mach-pxa/Kconfig    |   3 +
 arch/arm/mach-pxa/Makefile   |   1 +
 arch/arm/mach-pxa/am200epd.c | 374 +++++++++++++++++++++++++++++++++++++++++++
 drivers/video/Kconfig        |  13 --
 drivers/video/Makefile       |   1 -
 drivers/video/am200epd.c     | 295 ----------------------------------
 6 files changed, 378 insertions(+), 309 deletions(-)
 create mode 100644 arch/arm/mach-pxa/am200epd.c
 delete mode 100644 drivers/video/am200epd.c

(limited to 'drivers/video/Kconfig')

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index e8ee7ec9ff6..2c4851a3530 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -256,6 +256,9 @@ config PCM990_DISPLAY_NONE
 
 endchoice
 
+config MACH_AM200EPD
+	depends on MACH_GUMSTIX_F
+	bool "Enable AM200EPD board support"
 
 config PXA_EZX
 	bool "Motorola EZX Platform"
diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index 99ecbe7f850..ccbe1b08f88 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_CPU_PXA930)	+= pxa930.o
 
 # Specific board support
 obj-$(CONFIG_ARCH_GUMSTIX)	+= gumstix.o
+obj-$(CONFIG_MACH_AM200EPD)	+= am200epd.o
 obj-$(CONFIG_ARCH_LUBBOCK)	+= lubbock.o
 obj-$(CONFIG_MACH_LOGICPD_PXA270) += lpd270.o
 obj-$(CONFIG_MACH_MAINSTONE)	+= mainstone.o
diff --git a/arch/arm/mach-pxa/am200epd.c b/arch/arm/mach-pxa/am200epd.c
new file mode 100644
index 00000000000..b965085a37b
--- /dev/null
+++ b/arch/arm/mach-pxa/am200epd.c
@@ -0,0 +1,374 @@
+/*
+ * am200epd.c -- Platform device for AM200 EPD kit
+ *
+ * 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.
+ * on the AM200 EPD prototype kit/development kit with an E-Ink 800x600
+ * Vizplex EPD on a Gumstix board using the Lyre interface board.
+ *
+ */
+
+#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 <mach/pxafb.h>
+
+#include <video/metronomefb.h>
+
+static unsigned int panel_type = 6;
+static struct platform_device *am200_device;
+static struct metronome_board am200_board;
+
+static struct pxafb_mode_info am200_fb_mode_9inch7 = {
+	.pixclock	= 40000,
+	.xres		= 1200,
+	.yres		= 842,
+	.bpp		= 16,
+	.hsync_len	= 2,
+	.left_margin	= 2,
+	.right_margin	= 2,
+	.vsync_len	= 1,
+	.upper_margin	= 2,
+	.lower_margin	= 25,
+	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+};
+
+static struct pxafb_mode_info am200_fb_mode_8inch = {
+	.pixclock	= 40000,
+	.xres		= 1088,
+	.yres		= 791,
+	.bpp		= 16,
+	.hsync_len	= 28,
+	.left_margin	= 8,
+	.right_margin	= 30,
+	.vsync_len	= 8,
+	.upper_margin	= 10,
+	.lower_margin	= 8,
+	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+};
+
+static struct pxafb_mode_info am200_fb_mode_6inch = {
+	.pixclock	= 40189,
+	.xres		= 832,
+	.yres		= 622,
+	.bpp		= 16,
+	.hsync_len	= 28,
+	.left_margin	= 34,
+	.right_margin	= 34,
+	.vsync_len	= 25,
+	.upper_margin	= 0,
+	.lower_margin	= 2,
+	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+};
+
+static struct pxafb_mach_info am200_fb_info = {
+	.modes		= &am200_fb_mode_6inch,
+	.num_modes	= 1,
+	.lcd_conn	= LCD_TYPE_COLOR_TFT | LCD_PCLK_EDGE_FALL |
+			  LCD_AC_BIAS_FREQ(24),
+};
+
+/* register offsets for gpio control */
+#define LED_GPIO_PIN 51
+#define STDBY_GPIO_PIN 48
+#define RST_GPIO_PIN 49
+#define RDY_GPIO_PIN 32
+#define ERR_GPIO_PIN 17
+#define PCBPWR_GPIO_PIN 16
+static int gpios[] = { LED_GPIO_PIN , STDBY_GPIO_PIN , RST_GPIO_PIN,
+			RDY_GPIO_PIN, ERR_GPIO_PIN, PCBPWR_GPIO_PIN };
+static char *gpio_names[] = { "LED" , "STDBY" , "RST", "RDY", "ERR", "PCBPWR" };
+
+static int am200_init_gpio_regs(struct metronomefb_par *par)
+{
+	int i;
+	int err;
+
+	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
+		err = gpio_request(gpios[i], gpio_names[i]);
+		if (err) {
+			dev_err(&am200_device->dev, "failed requesting "
+				"gpio %s, err=%d\n", gpio_names[i], err);
+			goto err_req_gpio;
+		}
+	}
+
+	gpio_direction_output(LED_GPIO_PIN, 0);
+	gpio_direction_output(STDBY_GPIO_PIN, 0);
+	gpio_direction_output(RST_GPIO_PIN, 0);
+
+	gpio_direction_input(RDY_GPIO_PIN);
+	gpio_direction_input(ERR_GPIO_PIN);
+
+	gpio_direction_output(PCBPWR_GPIO_PIN, 0);
+
+	return 0;
+
+err_req_gpio:
+	while (i > 0)
+		gpio_free(gpios[i--]);
+
+	return err;
+}
+
+static void am200_cleanup(struct metronomefb_par *par)
+{
+	int i;
+
+	free_irq(IRQ_GPIO(RDY_GPIO_PIN), par);
+
+	for (i = 0; i < ARRAY_SIZE(gpios); i++)
+		gpio_free(gpios[i]);
+}
+
+static int am200_share_video_mem(struct fb_info *info)
+{
+	/* rough check if this is our desired fb and not something else */
+	if ((info->var.xres != am200_fb_info.modes->xres)
+		|| (info->var.yres != am200_fb_info.modes->yres))
+		return 0;
+
+	/* we've now been notified that we have our new fb */
+	am200_board.metromem = info->screen_base;
+	am200_board.host_fbinfo = info;
+
+	/* try to refcount host drv since we are the consumer after this */
+	if (!try_module_get(info->fbops->owner))
+		return -ENODEV;
+
+	return 0;
+}
+
+static int am200_unshare_video_mem(struct fb_info *info)
+{
+	dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);
+
+	if (info != am200_board.host_fbinfo)
+		return 0;
+
+	module_put(am200_board.host_fbinfo->fbops->owner);
+	return 0;
+}
+
+static int am200_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(&am200_device->dev, "ENTER %s\n", __func__);
+
+	if (event == FB_EVENT_FB_REGISTERED)
+		return am200_share_video_mem(info);
+	else if (event == FB_EVENT_FB_UNREGISTERED)
+		return am200_unshare_video_mem(info);
+
+	return 0;
+}
+
+static struct notifier_block am200_fb_notif = {
+	.notifier_call = am200_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 am200_presetup_fb(void)
+{
+	int fw;
+	int fh;
+	int padding_size;
+	int totalsize;
+
+	switch (panel_type) {
+	case 6:
+		am200_fb_info.modes = &am200_fb_mode_6inch;
+		break;
+	case 8:
+		am200_fb_info.modes = &am200_fb_mode_8inch;
+		break;
+	case 97:
+		am200_fb_info.modes = &am200_fb_mode_9inch7;
+		break;
+	default:
+		dev_err(&am200_device->dev, "invalid panel_type selection,"
+						" setting to 6\n");
+		am200_fb_info.modes = &am200_fb_mode_6inch;
+		break;
+	}
+
+	/* the frame buffer is divided as follows:
+	command | CRC | padding
+	16kb waveform data | CRC | padding
+	image data | CRC
+	*/
+
+	fw = am200_fb_info.modes->xres;
+	fh = am200_fb_info.modes->yres;
+
+	/* waveform must be 16k + 2 for checksum */
+	am200_board.wfm_size = roundup(16*1024 + 2, fw);
+
+	padding_size = PAGE_SIZE + (4 * fw);
+
+	/* total is 1 cmd , 1 wfm, padding and image */
+	totalsize = fw + am200_board.wfm_size + padding_size + (fw*fh);
+
+	/* save this off because we're manipulating fw after this and
+	 * we'll need it when we're ready to setup the framebuffer */
+	am200_board.fw = fw;
+	am200_board.fh = fh;
+
+	/* the reason we do this adjustment is because we want to acquire
+	 * more framebuffer memory without imposing custom awareness on the
+	 * underlying pxafb driver */
+	am200_fb_info.modes->yres = DIV_ROUND_UP(totalsize, fw);
+
+	/* we divide since we told the LCD controller we're 16bpp */
+	am200_fb_info.modes->xres /= 2;
+
+	set_pxa_fb_info(&am200_fb_info);
+
+}
+
+/* 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 am200_setup_fb(struct metronomefb_par *par)
+{
+	int fw;
+	int fh;
+
+	fw = am200_board.fw;
+	fh = am200_board.fh;
+
+	/* 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 *) am200_board.metromem;
+	par->metromem_wfm = am200_board.metromem + fw;
+	par->metromem_img = par->metromem_wfm + am200_board.wfm_size;
+	par->metromem_img_csum = (u16 *) (par->metromem_img + (fw * fh));
+	par->metromem_dma = am200_board.host_fbinfo->fix.smem_start;
+
+	return 0;
+}
+
+static int am200_get_panel_type(void)
+{
+	return panel_type;
+}
+
+static irqreturn_t am200_handle_irq(int irq, void *dev_id)
+{
+	struct metronomefb_par *par = dev_id;
+
+	wake_up_interruptible(&par->waitq);
+	return IRQ_HANDLED;
+}
+
+static int am200_setup_irq(struct fb_info *info)
+{
+	int ret;
+
+	ret = request_irq(IRQ_GPIO(RDY_GPIO_PIN), am200_handle_irq,
+				IRQF_DISABLED|IRQF_TRIGGER_FALLING,
+				"AM200", info->par);
+	if (ret)
+		dev_err(&am200_device->dev, "request_irq failed: %d\n", ret);
+
+	return ret;
+}
+
+static void am200_set_rst(struct metronomefb_par *par, int state)
+{
+	gpio_set_value(RST_GPIO_PIN, state);
+}
+
+static void am200_set_stdby(struct metronomefb_par *par, int state)
+{
+	gpio_set_value(STDBY_GPIO_PIN, state);
+}
+
+static int am200_wait_event(struct metronomefb_par *par)
+{
+	return wait_event_timeout(par->waitq, gpio_get_value(RDY_GPIO_PIN), HZ);
+}
+
+static int am200_wait_event_intr(struct metronomefb_par *par)
+{
+	return wait_event_interruptible_timeout(par->waitq,
+					gpio_get_value(RDY_GPIO_PIN), HZ);
+}
+
+static struct metronome_board am200_board = {
+	.owner			= THIS_MODULE,
+	.setup_irq		= am200_setup_irq,
+	.setup_io		= am200_init_gpio_regs,
+	.setup_fb		= am200_setup_fb,
+	.set_rst		= am200_set_rst,
+	.set_stdby		= am200_set_stdby,
+	.met_wait_event		= am200_wait_event,
+	.met_wait_event_intr	= am200_wait_event_intr,
+	.get_panel_type		= am200_get_panel_type,
+	.cleanup		= am200_cleanup,
+};
+
+static int __init am200_init(void)
+{
+	int ret;
+
+	/* before anything else, we request notification for any fb
+	 * creation events */
+	fb_register_client(&am200_fb_notif);
+
+	/* request our platform independent driver */
+	request_module("metronomefb");
+
+	am200_device = platform_device_alloc("metronomefb", -1);
+	if (!am200_device)
+		return -ENOMEM;
+
+	/* the am200_board that will be seen by metronomefb is a copy */
+	platform_device_add_data(am200_device, &am200_board,
+					sizeof(am200_board));
+
+	/* this _add binds metronomefb to am200. metronomefb refcounts am200 */
+	ret = platform_device_add(am200_device);
+
+	if (ret) {
+		platform_device_put(am200_device);
+		fb_unregister_client(&am200_fb_notif);
+		return ret;
+	}
+
+	am200_presetup_fb();
+
+	return 0;
+}
+
+module_param(panel_type, uint, 0);
+MODULE_PARM_DESC(panel_type, "Select the panel type: 6, 8, 97");
+
+module_init(am200_init);
+
+MODULE_DESCRIPTION("board driver for am200 metronome epd kit");
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 6fd4a2f63cf..d85a74c64b5 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1969,19 +1969,6 @@ config FB_XILINX
 	  framebuffer. ML300 carries a 640*480 LCD display on the board,
 	  ML403 uses a standard DB15 VGA connector.
 
-config FB_AM200EPD
-       tristate "AM-200 E-Ink EPD devkit support"
-       depends on FB && ARCH_PXA && MMU
-       select FB_SYS_FILLRECT
-       select FB_SYS_COPYAREA
-       select FB_SYS_IMAGEBLIT
-       select FB_SYS_FOPS
-       select FB_DEFERRED_IO
-       select FB_METRONOME
-       help
-         This enables support for the Metronome display controller used on
-         the E-Ink AM-200 EPD devkit.
-
 config FB_COBALT
 	tristate "Cobalt server LCD frame buffer support"
 	depends on FB && MIPS_COBALT
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index a6b55297a7f..ad0330bf9be 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -29,7 +29,6 @@ obj-$(CONFIG_FB_DEFERRED_IO)   += fb_defio.o
 
 # Hardware specific drivers go first
 obj-$(CONFIG_FB_AMIGA)            += amifb.o c2p.o
-obj-$(CONFIG_FB_AM200EPD)         += am200epd.o
 obj-$(CONFIG_FB_ARC)              += arcfb.o
 obj-$(CONFIG_FB_CLPS711X)         += clps711xfb.o
 obj-$(CONFIG_FB_CYBER2000)        += cyber2000fb.o
diff --git a/drivers/video/am200epd.c b/drivers/video/am200epd.c
deleted file mode 100644
index 0c35b8b0160..00000000000
--- a/drivers/video/am200epd.c
+++ /dev/null
@@ -1,295 +0,0 @@
-/*
- * linux/drivers/video/am200epd.c -- Platform device for AM200 EPD kit
- *
- * 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.
- * on the AM200 EPD prototype kit/development kit with an E-Ink 800x600
- * Vizplex EPD on a Gumstix board using the Lyre interface board.
- *
- */
-
-#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/list.h>
-#include <linux/uaccess.h>
-#include <linux/irq.h>
-
-#include <video/metronomefb.h>
-
-#include <mach/pxa-regs.h>
-
-/* register offsets for gpio control */
-#define LED_GPIO_PIN 51
-#define STDBY_GPIO_PIN 48
-#define RST_GPIO_PIN 49
-#define RDY_GPIO_PIN 32
-#define ERR_GPIO_PIN 17
-#define PCBPWR_GPIO_PIN 16
-
-#define AF_SEL_GPIO_N 0x3
-#define GAFR0_U_OFFSET(pin) ((pin - 16) * 2)
-#define GAFR1_L_OFFSET(pin) ((pin - 32) * 2)
-#define GAFR1_U_OFFSET(pin) ((pin - 48) * 2)
-#define GPDR1_OFFSET(pin) (pin - 32)
-#define GPCR1_OFFSET(pin) (pin - 32)
-#define GPSR1_OFFSET(pin) (pin - 32)
-#define GPCR0_OFFSET(pin) (pin)
-#define GPSR0_OFFSET(pin) (pin)
-
-static void am200_set_gpio_output(int pin, int val)
-{
-	u8 index;
-
-	index = pin >> 4;
-
-	switch (index) {
-	case 1:
-		if (val)
-			GPSR0 |= (1 << GPSR0_OFFSET(pin));
-		else
-			GPCR0 |= (1 << GPCR0_OFFSET(pin));
-		break;
-	case 2:
-		break;
-	case 3:
-		if (val)
-			GPSR1 |= (1 << GPSR1_OFFSET(pin));
-		else
-			GPCR1 |= (1 << GPCR1_OFFSET(pin));
-		break;
-	default:
-		printk(KERN_ERR "unimplemented\n");
-	}
-}
-
-static void __devinit am200_init_gpio_pin(int pin, int dir)
-{
-	u8 index;
-	/* dir 0 is output, 1 is input
-	- do 2 things here:
-	- set gpio alternate function to standard gpio
-	- set gpio direction to input or output  */
-
-	index = pin >> 4;
-	switch (index) {
-	case 1:
-		GAFR0_U &= ~(AF_SEL_GPIO_N << GAFR0_U_OFFSET(pin));
-
-		if (dir)
-			GPDR0 &= ~(1 << pin);
-		else
-			GPDR0 |= (1 << pin);
-		break;
-	case 2:
-		GAFR1_L &= ~(AF_SEL_GPIO_N << GAFR1_L_OFFSET(pin));
-
-		if (dir)
-			GPDR1 &= ~(1 << GPDR1_OFFSET(pin));
-		else
-			GPDR1 |= (1 << GPDR1_OFFSET(pin));
-		break;
-	case 3:
-		GAFR1_U &= ~(AF_SEL_GPIO_N << GAFR1_U_OFFSET(pin));
-
-		if (dir)
-			GPDR1 &= ~(1 << GPDR1_OFFSET(pin));
-		else
-			GPDR1 |= (1 << GPDR1_OFFSET(pin));
-		break;
-	default:
-		printk(KERN_ERR "unimplemented\n");
-	}
-}
-
-static void am200_init_gpio_regs(struct metronomefb_par *par)
-{
-	am200_init_gpio_pin(LED_GPIO_PIN, 0);
-	am200_set_gpio_output(LED_GPIO_PIN, 0);
-
-	am200_init_gpio_pin(STDBY_GPIO_PIN, 0);
-	am200_set_gpio_output(STDBY_GPIO_PIN, 0);
-
-	am200_init_gpio_pin(RST_GPIO_PIN, 0);
-	am200_set_gpio_output(RST_GPIO_PIN, 0);
-
-	am200_init_gpio_pin(RDY_GPIO_PIN, 1);
-
-	am200_init_gpio_pin(ERR_GPIO_PIN, 1);
-
-	am200_init_gpio_pin(PCBPWR_GPIO_PIN, 0);
-	am200_set_gpio_output(PCBPWR_GPIO_PIN, 0);
-}
-
-static void am200_disable_lcd_controller(struct metronomefb_par *par)
-{
-	LCSR = 0xffffffff;	/* Clear LCD Status Register */
-	LCCR0 |= LCCR0_DIS;	/* Disable LCD Controller */
-
-	/* we reset and just wait for things to settle */
-	msleep(200);
-}
-
-static void am200_enable_lcd_controller(struct metronomefb_par *par)
-{
-	LCSR = 0xffffffff;
-	FDADR0 = par->metromem_desc_dma;
-	LCCR0 |= LCCR0_ENB;
-}
-
-static void am200_init_lcdc_regs(struct metronomefb_par *par)
-{
-	/* here we do:
-	- disable the lcd controller
-	- setup lcd control registers
-	- setup dma descriptor
-	- reenable lcd controller
-	*/
-
-	/* disable the lcd controller */
-	am200_disable_lcd_controller(par);
-
-	/* setup lcd control registers */
-	LCCR0 = LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | LCCR0_PAS
-		| LCCR0_QDM | LCCR0_BM | LCCR0_OUM;
-
-	LCCR1 = (par->info->var.xres/2 - 1) /* pixels per line */
-		| (27 << 10) /* hsync pulse width - 1 */
-		| (33 << 16) /* eol pixel count */
-		| (33 << 24); /* bol pixel count */
-
-	LCCR2 = (par->info->var.yres - 1) /* lines per panel */
-		| (24 << 10) /* vsync pulse width - 1 */
-		| (2 << 16) /* eof pixel count */
-		| (0 << 24); /* bof pixel count */
-
-	LCCR3 = 2 /* pixel clock divisor */
-		| (24 << 8) /* AC Bias pin freq */
-		| LCCR3_16BPP /* BPP */
-		| LCCR3_PCP;  /* PCP falling edge */
-
-}
-
-static void am200_post_dma_setup(struct metronomefb_par *par)
-{
-	par->metromem_desc->mFDADR0 = par->metromem_desc_dma;
-	par->metromem_desc->mFSADR0 = par->metromem_dma;
-	par->metromem_desc->mFIDR0 = 0;
-	par->metromem_desc->mLDCMD0 = par->info->var.xres
-					* par->info->var.yres;
-	am200_enable_lcd_controller(par);
-}
-
-static void am200_free_irq(struct fb_info *info)
-{
-	free_irq(IRQ_GPIO(RDY_GPIO_PIN), info);
-}
-
-static irqreturn_t am200_handle_irq(int irq, void *dev_id)
-{
-	struct fb_info *info = dev_id;
-	struct metronomefb_par *par = info->par;
-
-	wake_up_interruptible(&par->waitq);
-	return IRQ_HANDLED;
-}
-
-static int am200_setup_irq(struct fb_info *info)
-{
-	int retval;
-
-	retval = request_irq(IRQ_GPIO(RDY_GPIO_PIN), am200_handle_irq,
-				IRQF_DISABLED, "AM200", info);
-	if (retval) {
-		printk(KERN_ERR "am200epd: request_irq failed: %d\n", retval);
-		return retval;
-	}
-
-	return set_irq_type(IRQ_GPIO(RDY_GPIO_PIN), IRQ_TYPE_EDGE_FALLING);
-}
-
-static void am200_set_rst(struct metronomefb_par *par, int state)
-{
-	am200_set_gpio_output(RST_GPIO_PIN, state);
-}
-
-static void am200_set_stdby(struct metronomefb_par *par, int state)
-{
-	am200_set_gpio_output(STDBY_GPIO_PIN, state);
-}
-
-static int am200_wait_event(struct metronomefb_par *par)
-{
-	return wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ);
-}
-
-static int am200_wait_event_intr(struct metronomefb_par *par)
-{
-	return wait_event_interruptible_timeout(par->waitq, (GPLR1 & 0x01), HZ);
-}
-
-static struct metronome_board am200_board = {
-	.owner			= THIS_MODULE,
-	.free_irq		= am200_free_irq,
-	.setup_irq		= am200_setup_irq,
-	.init_gpio_regs		= am200_init_gpio_regs,
-	.init_lcdc_regs		= am200_init_lcdc_regs,
-	.post_dma_setup		= am200_post_dma_setup,
-	.set_rst		= am200_set_rst,
-	.set_stdby		= am200_set_stdby,
-	.met_wait_event		= am200_wait_event,
-	.met_wait_event_intr	= am200_wait_event_intr,
-};
-
-static struct platform_device *am200_device;
-
-static int __init am200_init(void)
-{
-	int ret;
-
-	/* request our platform independent driver */
-	request_module("metronomefb");
-
-	am200_device = platform_device_alloc("metronomefb", -1);
-	if (!am200_device)
-		return -ENOMEM;
-
-	platform_device_add_data(am200_device, &am200_board,
-					sizeof(am200_board));
-
-	/* this _add binds metronomefb to am200. metronomefb refcounts am200 */
-	ret = platform_device_add(am200_device);
-
-	if (ret)
-		platform_device_put(am200_device);
-
-	return ret;
-}
-
-static void __exit am200_exit(void)
-{
-	platform_device_unregister(am200_device);
-}
-
-module_init(am200_init);
-module_exit(am200_exit);
-
-MODULE_DESCRIPTION("board driver for am200 metronome epd kit");
-MODULE_AUTHOR("Jaya Kumar");
-MODULE_LICENSE("GPL");
-- 
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