Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1390 insertions, 0 deletions

diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
new file mode 100644
index 000000000000..483ad9bab539
--- /dev/null
+++ b/drivers/video/pxafb.c
@@ -0,0 +1,1390 @@
+/*
+ *  linux/drivers/video/pxafb.c
+ *
+ *  Copyright (C) 1999 Eric A. Thomas.
+ *  Copyright (C) 2004 Jean-Frederic Clere.
+ *  Copyright (C) 2004 Ian Campbell.
+ *  Copyright (C) 2004 Jeff Lackey.
+ *   Based on sa1100fb.c Copyright (C) 1999 Eric A. Thomas
+ *  which in turn is
+ *   Based on acornfb.c Copyright (C) Russell King.
+ *
+ * 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.
+ *
+ *	        Intel PXA250/210 LCD Controller Frame Buffer Driver
+ *
+ * Please direct your questions and comments on this driver to the following
+ * email address:
+ *
+ *	linux-arm-kernel@lists.arm.linux.org.uk
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/fb.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/cpufreq.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/bitfield.h>
+#include <asm/arch/pxafb.h>
+
+/*
+ * Complain if VAR is out of range.
+ */
+#define DEBUG_VAR 1
+
+#include "pxafb.h"
+
+/* Bits which should not be set in machine configuration structures */
+#define LCCR0_INVALID_CONFIG_MASK (LCCR0_OUM|LCCR0_BM|LCCR0_QDM|LCCR0_DIS|LCCR0_EFM|LCCR0_IUM|LCCR0_SFM|LCCR0_LDM|LCCR0_ENB)
+#define LCCR3_INVALID_CONFIG_MASK (LCCR3_HSP|LCCR3_VSP|LCCR3_PCD|LCCR3_BPP)
+
+static void (*pxafb_backlight_power)(int);
+static void (*pxafb_lcd_power)(int);
+
+static int pxafb_activate_var(struct fb_var_screeninfo *var, struct pxafb_info *);
+static void set_ctrlr_state(struct pxafb_info *fbi, u_int state);
+
+#ifdef CONFIG_FB_PXA_PARAMETERS
+#define PXAFB_OPTIONS_SIZE 256
+static char g_options[PXAFB_OPTIONS_SIZE] __initdata = "";
+#endif
+
+static inline void pxafb_schedule_work(struct pxafb_info *fbi, u_int state)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	/*
+	 * We need to handle two requests being made at the same time.
+	 * There are two important cases:
+	 *  1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE)
+	 *     We must perform the unblanking, which will do our REENABLE for us.
+	 *  2. When we are blanking, but immediately unblank before we have
+	 *     blanked.  We do the "REENABLE" thing here as well, just to be sure.
+	 */
+	if (fbi->task_state == C_ENABLE && state == C_REENABLE)
+		state = (u_int) -1;
+	if (fbi->task_state == C_DISABLE && state == C_ENABLE)
+		state = C_REENABLE;
+
+	if (state != (u_int)-1) {
+		fbi->task_state = state;
+		schedule_work(&fbi->task);
+	}
+	local_irq_restore(flags);
+}
+
+static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
+{
+	chan &= 0xffff;
+	chan >>= 16 - bf->length;
+	return chan << bf->offset;
+}
+
+static int
+pxafb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
+		       u_int trans, struct fb_info *info)
+{
+	struct pxafb_info *fbi = (struct pxafb_info *)info;
+	u_int val, ret = 1;
+
+	if (regno < fbi->palette_size) {
+		if (fbi->fb.var.grayscale) {
+			val = ((blue >> 8) & 0x00ff);
+		} else {
+			val  = ((red   >>  0) & 0xf800);
+			val |= ((green >>  5) & 0x07e0);
+			val |= ((blue  >> 11) & 0x001f);
+		}
+		fbi->palette_cpu[regno] = val;
+		ret = 0;
+	}
+	return ret;
+}
+
+static int
+pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+		   u_int trans, struct fb_info *info)
+{
+	struct pxafb_info *fbi = (struct pxafb_info *)info;
+	unsigned int val;
+	int ret = 1;
+
+	/*
+	 * If inverse mode was selected, invert all the colours
+	 * rather than the register number.  The register number
+	 * is what you poke into the framebuffer to produce the
+	 * colour you requested.
+	 */
+	if (fbi->cmap_inverse) {
+		red   = 0xffff - red;
+		green = 0xffff - green;
+		blue  = 0xffff - blue;
+	}
+
+	/*
+	 * If greyscale is true, then we convert the RGB value
+	 * to greyscale no matter what visual we are using.
+	 */
+	if (fbi->fb.var.grayscale)
+		red = green = blue = (19595 * red + 38470 * green +
+					7471 * blue) >> 16;
+
+	switch (fbi->fb.fix.visual) {
+	case FB_VISUAL_TRUECOLOR:
+		/*
+		 * 16-bit True Colour.  We encode the RGB value
+		 * according to the RGB bitfield information.
+		 */
+		if (regno < 16) {
+			u32 *pal = fbi->fb.pseudo_palette;
+
+			val  = chan_to_field(red, &fbi->fb.var.red);
+			val |= chan_to_field(green, &fbi->fb.var.green);
+			val |= chan_to_field(blue, &fbi->fb.var.blue);
+
+			pal[regno] = val;
+			ret = 0;
+		}
+		break;
+
+	case FB_VISUAL_STATIC_PSEUDOCOLOR:
+	case FB_VISUAL_PSEUDOCOLOR:
+		ret = pxafb_setpalettereg(regno, red, green, blue, trans, info);
+		break;
+	}
+
+	return ret;
+}
+
+/*
+ *  pxafb_bpp_to_lccr3():
+ *    Convert a bits per pixel value to the correct bit pattern for LCCR3
+ */
+static int pxafb_bpp_to_lccr3(struct fb_var_screeninfo *var)
+{
+        int ret = 0;
+        switch (var->bits_per_pixel) {
+        case 1:  ret = LCCR3_1BPP; break;
+        case 2:  ret = LCCR3_2BPP; break;
+        case 4:  ret = LCCR3_4BPP; break;
+        case 8:  ret = LCCR3_8BPP; break;
+        case 16: ret = LCCR3_16BPP; break;
+        }
+        return ret;
+}
+
+#ifdef CONFIG_CPU_FREQ
+/*
+ *  pxafb_display_dma_period()
+ *    Calculate the minimum period (in picoseconds) between two DMA
+ *    requests for the LCD controller.  If we hit this, it means we're
+ *    doing nothing but LCD DMA.
+ */
+static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var)
+{
+       /*
+        * Period = pixclock * bits_per_byte * bytes_per_transfer
+        *              / memory_bits_per_pixel;
+        */
+       return var->pixclock * 8 * 16 / var->bits_per_pixel;
+}
+
+extern unsigned int get_clk_frequency_khz(int info);
+#endif
+
+/*
+ *  pxafb_check_var():
+ *    Get the video params out of 'var'. If a value doesn't fit, round it up,
+ *    if it's too big, return -EINVAL.
+ *
+ *    Round up in the following order: bits_per_pixel, xres,
+ *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
+ *    bitfields, horizontal timing, vertical timing.
+ */
+static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct pxafb_info *fbi = (struct pxafb_info *)info;
+
+	if (var->xres < MIN_XRES)
+		var->xres = MIN_XRES;
+	if (var->yres < MIN_YRES)
+		var->yres = MIN_YRES;
+	if (var->xres > fbi->max_xres)
+		var->xres = fbi->max_xres;
+	if (var->yres > fbi->max_yres)
+		var->yres = fbi->max_yres;
+	var->xres_virtual =
+		max(var->xres_virtual, var->xres);
+	var->yres_virtual =
+		max(var->yres_virtual, var->yres);
+
+        /*
+	 * Setup the RGB parameters for this display.
+	 *
+	 * The pixel packing format is described on page 7-11 of the
+	 * PXA2XX Developer's Manual.
+         */
+	if (var->bits_per_pixel == 16) {
+		var->red.offset   = 11; var->red.length   = 5;
+		var->green.offset = 5;  var->green.length = 6;
+		var->blue.offset  = 0;  var->blue.length  = 5;
+		var->transp.offset = var->transp.length = 0;
+	} else {
+		var->red.offset = var->green.offset = var->blue.offset = var->transp.offset = 0;
+		var->red.length   = 8;
+		var->green.length = 8;
+		var->blue.length  = 8;
+		var->transp.length = 0;
+	}
+
+#ifdef CONFIG_CPU_FREQ
+	DPRINTK("dma period = %d ps, clock = %d kHz\n",
+		pxafb_display_dma_period(var),
+		get_clk_frequency_khz(0));
+#endif
+
+	return 0;
+}
+
+static inline void pxafb_set_truecolor(u_int is_true_color)
+{
+	DPRINTK("true_color = %d\n", is_true_color);
+	// do your machine-specific setup if needed
+}
+
+/*
+ * pxafb_set_par():
+ *	Set the user defined part of the display for the specified console
+ */
+static int pxafb_set_par(struct fb_info *info)
+{
+	struct pxafb_info *fbi = (struct pxafb_info *)info;
+	struct fb_var_screeninfo *var = &info->var;
+	unsigned long palette_mem_size;
+
+	DPRINTK("set_par\n");
+
+	if (var->bits_per_pixel == 16)
+		fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
+	else if (!fbi->cmap_static)
+		fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
+	else {
+		/*
+		 * Some people have weird ideas about wanting static
+		 * pseudocolor maps.  I suspect their user space
+		 * applications are broken.
+		 */
+		fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
+	}
+
+	fbi->fb.fix.line_length = var->xres_virtual *
+				  var->bits_per_pixel / 8;
+	if (var->bits_per_pixel == 16)
+		fbi->palette_size = 0;
+	else
+		fbi->palette_size = var->bits_per_pixel == 1 ? 4 : 1 << var->bits_per_pixel;
+
+	palette_mem_size = fbi->palette_size * sizeof(u16);
+
+	DPRINTK("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
+
+	fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
+	fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
+
+	/*
+	 * Set (any) board control register to handle new color depth
+	 */
+	pxafb_set_truecolor(fbi->fb.fix.visual == FB_VISUAL_TRUECOLOR);
+
+	if (fbi->fb.var.bits_per_pixel == 16)
+		fb_dealloc_cmap(&fbi->fb.cmap);
+	else
+		fb_alloc_cmap(&fbi->fb.cmap, 1<<fbi->fb.var.bits_per_pixel, 0);
+
+	pxafb_activate_var(var, fbi);
+
+	return 0;
+}
+
+/*
+ * Formal definition of the VESA spec:
+ *  On
+ *  	This refers to the state of the display when it is in full operation
+ *  Stand-By
+ *  	This defines an optional operating state of minimal power reduction with
+ *  	the shortest recovery time
+ *  Suspend
+ *  	This refers to a level of power management in which substantial power
+ *  	reduction is achieved by the display.  The display can have a longer
+ *  	recovery time from this state than from the Stand-by state
+ *  Off
+ *  	This indicates that the display is consuming the lowest level of power
+ *  	and is non-operational. Recovery from this state may optionally require
+ *  	the user to manually power on the monitor
+ *
+ *  Now, the fbdev driver adds an additional state, (blank), where they
+ *  turn off the video (maybe by colormap tricks), but don't mess with the
+ *  video itself: think of it semantically between on and Stand-By.
+ *
+ *  So here's what we should do in our fbdev blank routine:
+ *
+ *  	VESA_NO_BLANKING (mode 0)	Video on,  front/back light on
+ *  	VESA_VSYNC_SUSPEND (mode 1)  	Video on,  front/back light off
+ *  	VESA_HSYNC_SUSPEND (mode 2)  	Video on,  front/back light off
+ *  	VESA_POWERDOWN (mode 3)		Video off, front/back light off
+ *
+ *  This will match the matrox implementation.
+ */
+
+/*
+ * pxafb_blank():
+ *	Blank the display by setting all palette values to zero.  Note, the
+ * 	16 bpp mode does not really use the palette, so this will not
+ *      blank the display in all modes.
+ */
+static int pxafb_blank(int blank, struct fb_info *info)
+{
+	struct pxafb_info *fbi = (struct pxafb_info *)info;
+	int i;
+
+	DPRINTK("pxafb_blank: blank=%d\n", blank);
+
+	switch (blank) {
+	case FB_BLANK_POWERDOWN:
+	case FB_BLANK_VSYNC_SUSPEND:
+	case FB_BLANK_HSYNC_SUSPEND:
+	case FB_BLANK_NORMAL:
+		if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
+		    fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
+			for (i = 0; i < fbi->palette_size; i++)
+				pxafb_setpalettereg(i, 0, 0, 0, 0, info);
+
+		pxafb_schedule_work(fbi, C_DISABLE);
+		//TODO if (pxafb_blank_helper) pxafb_blank_helper(blank);
+		break;
+
+	case FB_BLANK_UNBLANK:
+		//TODO if (pxafb_blank_helper) pxafb_blank_helper(blank);
+		if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
+		    fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
+			fb_set_cmap(&fbi->fb.cmap, info);
+		pxafb_schedule_work(fbi, C_ENABLE);
+	}
+	return 0;
+}
+
+static int pxafb_mmap(struct fb_info *info, struct file *file,
+		      struct vm_area_struct *vma)
+{
+	struct pxafb_info *fbi = (struct pxafb_info *)info;
+	unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
+
+	if (off < info->fix.smem_len) {
+		vma->vm_pgoff += 1;
+		return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu,
+					     fbi->map_dma, fbi->map_size);
+	}
+	return -EINVAL;
+}
+
+static struct fb_ops pxafb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_check_var	= pxafb_check_var,
+	.fb_set_par	= pxafb_set_par,
+	.fb_setcolreg	= pxafb_setcolreg,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+	.fb_blank	= pxafb_blank,
+	.fb_cursor	= soft_cursor,
+	.fb_mmap	= pxafb_mmap,
+};
+
+/*
+ * Calculate the PCD value from the clock rate (in picoseconds).
+ * We take account of the PPCR clock setting.
+ * From PXA Developer's Manual:
+ *
+ *   PixelClock =      LCLK
+ *                -------------
+ *                2 ( PCD + 1 )
+ *
+ *   PCD =      LCLK
+ *         ------------- - 1
+ *         2(PixelClock)
+ *
+ * Where:
+ *   LCLK = LCD/Memory Clock
+ *   PCD = LCCR3[7:0]
+ *
+ * PixelClock here is in Hz while the pixclock argument given is the
+ * period in picoseconds. Hence PixelClock = 1 / ( pixclock * 10^-12 )
+ *
+ * The function get_lclk_frequency_10khz returns LCLK in units of
+ * 10khz. Calling the result of this function lclk gives us the
+ * following
+ *
+ *    PCD = (lclk * 10^4 ) * ( pixclock * 10^-12 )
+ *          -------------------------------------- - 1
+ *                          2
+ *
+ * Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used below.
+ */
+static inline unsigned int get_pcd(unsigned int pixclock)
+{
+	unsigned long long pcd;
+
+	/* FIXME: Need to take into account Double Pixel Clock mode
+         * (DPC) bit? or perhaps set it based on the various clock
+         * speeds */
+
+	pcd = (unsigned long long)get_lcdclk_frequency_10khz() * pixclock;
+	pcd /= 100000000 * 2;
+	/* no need for this, since we should subtract 1 anyway. they cancel */
+	/* pcd += 1; */ /* make up for integer math truncations */
+	return (unsigned int)pcd;
+}
+
+/*
+ * pxafb_activate_var():
+ *	Configures LCD Controller based on entries in var parameter.  Settings are
+ *	only written to the controller if changes were made.
+ */
+static int pxafb_activate_var(struct fb_var_screeninfo *var, struct pxafb_info *fbi)
+{
+	struct pxafb_lcd_reg new_regs;
+	u_long flags;
+	u_int lines_per_panel, pcd = get_pcd(var->pixclock);
+
+	DPRINTK("Configuring PXA LCD\n");
+
+	DPRINTK("var: xres=%d hslen=%d lm=%d rm=%d\n",
+		var->xres, var->hsync_len,
+		var->left_margin, var->right_margin);
+	DPRINTK("var: yres=%d vslen=%d um=%d bm=%d\n",
+		var->yres, var->vsync_len,
+		var->upper_margin, var->lower_margin);
+	DPRINTK("var: pixclock=%d pcd=%d\n", var->pixclock, pcd);
+
+#if DEBUG_VAR
+	if (var->xres < 16        || var->xres > 1024)
+		printk(KERN_ERR "%s: invalid xres %d\n",
+			fbi->fb.fix.id, var->xres);
+	switch(var->bits_per_pixel) {
+	case 1:
+	case 2:
+	case 4:
+	case 8:
+	case 16:
+		break;
+	default:
+		printk(KERN_ERR "%s: invalid bit depth %d\n",
+		       fbi->fb.fix.id, var->bits_per_pixel);
+		break;
+	}
+	if (var->hsync_len < 1    || var->hsync_len > 64)
+		printk(KERN_ERR "%s: invalid hsync_len %d\n",
+			fbi->fb.fix.id, var->hsync_len);
+	if (var->left_margin < 1  || var->left_margin > 255)
+		printk(KERN_ERR "%s: invalid left_margin %d\n",
+			fbi->fb.fix.id, var->left_margin);
+	if (var->right_margin < 1 || var->right_margin > 255)
+		printk(KERN_ERR "%s: invalid right_margin %d\n",
+			fbi->fb.fix.id, var->right_margin);
+	if (var->yres < 1         || var->yres > 1024)
+		printk(KERN_ERR "%s: invalid yres %d\n",
+			fbi->fb.fix.id, var->yres);
+	if (var->vsync_len < 1    || var->vsync_len > 64)
+		printk(KERN_ERR "%s: invalid vsync_len %d\n",
+			fbi->fb.fix.id, var->vsync_len);
+	if (var->upper_margin < 0 || var->upper_margin > 255)
+		printk(KERN_ERR "%s: invalid upper_margin %d\n",
+			fbi->fb.fix.id, var->upper_margin);
+	if (var->lower_margin < 0 || var->lower_margin > 255)
+		printk(KERN_ERR "%s: invalid lower_margin %d\n",
+			fbi->fb.fix.id, var->lower_margin);
+#endif
+
+	new_regs.lccr0 = fbi->lccr0 |
+		(LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM |
+                 LCCR0_QDM | LCCR0_BM  | LCCR0_OUM);
+
+	new_regs.lccr1 =
+		LCCR1_DisWdth(var->xres) +
+		LCCR1_HorSnchWdth(var->hsync_len) +
+		LCCR1_BegLnDel(var->left_margin) +
+		LCCR1_EndLnDel(var->right_margin);
+
+	/*
+	 * If we have a dual scan LCD, we need to halve
+	 * the YRES parameter.
+	 */
+	lines_per_panel = var->yres;
+	if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual)
+		lines_per_panel /= 2;
+
+	new_regs.lccr2 =
+		LCCR2_DisHght(lines_per_panel) +
+		LCCR2_VrtSnchWdth(var->vsync_len) +
+		LCCR2_BegFrmDel(var->upper_margin) +
+		LCCR2_EndFrmDel(var->lower_margin);
+
+	new_regs.lccr3 = fbi->lccr3 |
+		pxafb_bpp_to_lccr3(var) |
+		(var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
+		(var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL);
+
+	if (pcd)
+		new_regs.lccr3 |= LCCR3_PixClkDiv(pcd);
+
+	DPRINTK("nlccr0 = 0x%08x\n", new_regs.lccr0);
+	DPRINTK("nlccr1 = 0x%08x\n", new_regs.lccr1);
+	DPRINTK("nlccr2 = 0x%08x\n", new_regs.lccr2);
+	DPRINTK("nlccr3 = 0x%08x\n", new_regs.lccr3);
+
+	/* Update shadow copy atomically */
+	local_irq_save(flags);
+
+	/* setup dma descriptors */
+	fbi->dmadesc_fblow_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 3*16);
+	fbi->dmadesc_fbhigh_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 2*16);
+	fbi->dmadesc_palette_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 1*16);
+
+	fbi->dmadesc_fblow_dma = fbi->palette_dma - 3*16;
+	fbi->dmadesc_fbhigh_dma = fbi->palette_dma - 2*16;
+	fbi->dmadesc_palette_dma = fbi->palette_dma - 1*16;
+
+#define BYTES_PER_PANEL (lines_per_panel * fbi->fb.fix.line_length)
+
+	/* populate descriptors */
+	fbi->dmadesc_fblow_cpu->fdadr = fbi->dmadesc_fblow_dma;
+	fbi->dmadesc_fblow_cpu->fsadr = fbi->screen_dma + BYTES_PER_PANEL;
+	fbi->dmadesc_fblow_cpu->fidr  = 0;
+	fbi->dmadesc_fblow_cpu->ldcmd = BYTES_PER_PANEL;
+
+	fbi->fdadr1 = fbi->dmadesc_fblow_dma; /* only used in dual-panel mode */
+
+	fbi->dmadesc_fbhigh_cpu->fsadr = fbi->screen_dma;
+	fbi->dmadesc_fbhigh_cpu->fidr = 0;
+	fbi->dmadesc_fbhigh_cpu->ldcmd = BYTES_PER_PANEL;
+
+	fbi->dmadesc_palette_cpu->fsadr = fbi->palette_dma;
+	fbi->dmadesc_palette_cpu->fidr  = 0;
+	fbi->dmadesc_palette_cpu->ldcmd = (fbi->palette_size * 2) | LDCMD_PAL;
+
+	if (var->bits_per_pixel == 16) {
+		/* palette shouldn't be loaded in true-color mode */
+		fbi->dmadesc_fbhigh_cpu->fdadr = fbi->dmadesc_fbhigh_dma;
+		fbi->fdadr0 = fbi->dmadesc_fbhigh_dma; /* no pal just fbhigh */
+		/* init it to something, even though we won't be using it */
+		fbi->dmadesc_palette_cpu->fdadr = fbi->dmadesc_palette_dma;
+	} else {
+		fbi->dmadesc_palette_cpu->fdadr = fbi->dmadesc_fbhigh_dma;
+		fbi->dmadesc_fbhigh_cpu->fdadr = fbi->dmadesc_palette_dma;
+		fbi->fdadr0 = fbi->dmadesc_palette_dma; /* flips back and forth between pal and fbhigh */
+	}
+
+#if 0
+	DPRINTK("fbi->dmadesc_fblow_cpu = 0x%p\n", fbi->dmadesc_fblow_cpu);
+	DPRINTK("fbi->dmadesc_fbhigh_cpu = 0x%p\n", fbi->dmadesc_fbhigh_cpu);
+	DPRINTK("fbi->dmadesc_palette_cpu = 0x%p\n", fbi->dmadesc_palette_cpu);
+	DPRINTK("fbi->dmadesc_fblow_dma = 0x%x\n", fbi->dmadesc_fblow_dma);
+	DPRINTK("fbi->dmadesc_fbhigh_dma = 0x%x\n", fbi->dmadesc_fbhigh_dma);
+	DPRINTK("fbi->dmadesc_palette_dma = 0x%x\n", fbi->dmadesc_palette_dma);
+
+	DPRINTK("fbi->dmadesc_fblow_cpu->fdadr = 0x%x\n", fbi->dmadesc_fblow_cpu->fdadr);
+	DPRINTK("fbi->dmadesc_fbhigh_cpu->fdadr = 0x%x\n", fbi->dmadesc_fbhigh_cpu->fdadr);
+	DPRINTK("fbi->dmadesc_palette_cpu->fdadr = 0x%x\n", fbi->dmadesc_palette_cpu->fdadr);
+
+	DPRINTK("fbi->dmadesc_fblow_cpu->fsadr = 0x%x\n", fbi->dmadesc_fblow_cpu->fsadr);
+	DPRINTK("fbi->dmadesc_fbhigh_cpu->fsadr = 0x%x\n", fbi->dmadesc_fbhigh_cpu->fsadr);
+	DPRINTK("fbi->dmadesc_palette_cpu->fsadr = 0x%x\n", fbi->dmadesc_palette_cpu->fsadr);
+
+	DPRINTK("fbi->dmadesc_fblow_cpu->ldcmd = 0x%x\n", fbi->dmadesc_fblow_cpu->ldcmd);
+	DPRINTK("fbi->dmadesc_fbhigh_cpu->ldcmd = 0x%x\n", fbi->dmadesc_fbhigh_cpu->ldcmd);
+	DPRINTK("fbi->dmadesc_palette_cpu->ldcmd = 0x%x\n", fbi->dmadesc_palette_cpu->ldcmd);
+#endif
+
+	fbi->reg_lccr0 = new_regs.lccr0;
+	fbi->reg_lccr1 = new_regs.lccr1;
+	fbi->reg_lccr2 = new_regs.lccr2;
+	fbi->reg_lccr3 = new_regs.lccr3;
+	local_irq_restore(flags);
+
+	/*
+	 * Only update the registers if the controller is enabled
+	 * and something has changed.
+	 */
+	if ((LCCR0  != fbi->reg_lccr0) || (LCCR1  != fbi->reg_lccr1) ||
+	    (LCCR2  != fbi->reg_lccr2) || (LCCR3  != fbi->reg_lccr3) ||
+	    (FDADR0 != fbi->fdadr0)    || (FDADR1 != fbi->fdadr1))
+		pxafb_schedule_work(fbi, C_REENABLE);
+
+	return 0;
+}
+
+/*
+ * NOTE!  The following functions are purely helpers for set_ctrlr_state.
+ * Do not call them directly; set_ctrlr_state does the correct serialisation
+ * to ensure that things happen in the right way 100% of time time.
+ *	-- rmk
+ */
+static inline void __pxafb_backlight_power(struct pxafb_info *fbi, int on)
+{
+	DPRINTK("backlight o%s\n", on ? "n" : "ff");
+
+ 	if (pxafb_backlight_power)
+ 		pxafb_backlight_power(on);
+}
+
+static inline void __pxafb_lcd_power(struct pxafb_info *fbi, int on)
+{
+	DPRINTK("LCD power o%s\n", on ? "n" : "ff");
+
+	if (pxafb_lcd_power)
+		pxafb_lcd_power(on);
+}
+
+static void pxafb_setup_gpio(struct pxafb_info *fbi)
+{
+	int gpio, ldd_bits;
+        unsigned int lccr0 = fbi->lccr0;
+
+	/*
+	 * setup is based on type of panel supported
+        */
+
+	/* 4 bit interface */
+	if ((lccr0 & LCCR0_CMS) == LCCR0_Mono &&
+	    (lccr0 & LCCR0_SDS) == LCCR0_Sngl &&
+	    (lccr0 & LCCR0_DPD) == LCCR0_4PixMono)
+		ldd_bits = 4;
+
+	/* 8 bit interface */
+        else if (((lccr0 & LCCR0_CMS) == LCCR0_Mono &&
+		  ((lccr0 & LCCR0_SDS) == LCCR0_Dual || (lccr0 & LCCR0_DPD) == LCCR0_8PixMono)) ||
+                 ((lccr0 & LCCR0_CMS) == LCCR0_Color &&
+		  (lccr0 & LCCR0_PAS) == LCCR0_Pas && (lccr0 & LCCR0_SDS) == LCCR0_Sngl))
+		ldd_bits = 8;
+
+	/* 16 bit interface */
+	else if ((lccr0 & LCCR0_CMS) == LCCR0_Color &&
+		 ((lccr0 & LCCR0_SDS) == LCCR0_Dual || (lccr0 & LCCR0_PAS) == LCCR0_Act))
+		ldd_bits = 16;
+
+	else {
+	        printk(KERN_ERR "pxafb_setup_gpio: unable to determine bits per pixel\n");
+		return;
+        }
+
+	for (gpio = 58; ldd_bits; gpio++, ldd_bits--)
+		pxa_gpio_mode(gpio | GPIO_ALT_FN_2_OUT);
+	pxa_gpio_mode(GPIO74_LCD_FCLK_MD);
+	pxa_gpio_mode(GPIO75_LCD_LCLK_MD);
+	pxa_gpio_mode(GPIO76_LCD_PCLK_MD);
+	pxa_gpio_mode(GPIO77_LCD_ACBIAS_MD);
+}
+
+static void pxafb_enable_controller(struct pxafb_info *fbi)
+{
+	DPRINTK("Enabling LCD controller\n");
+	DPRINTK("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr0);
+	DPRINTK("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr1);
+	DPRINTK("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0);
+	DPRINTK("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1);
+	DPRINTK("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2);
+	DPRINTK("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3);
+
+	/* Sequence from 11.7.10 */
+	LCCR3 = fbi->reg_lccr3;
+	LCCR2 = fbi->reg_lccr2;
+	LCCR1 = fbi->reg_lccr1;
+	LCCR0 = fbi->reg_lccr0 & ~LCCR0_ENB;
+
+	FDADR0 = fbi->fdadr0;
+	FDADR1 = fbi->fdadr1;
+	LCCR0 |= LCCR0_ENB;
+
+	DPRINTK("FDADR0 0x%08x\n", (unsigned int) FDADR0);
+	DPRINTK("FDADR1 0x%08x\n", (unsigned int) FDADR1);
+	DPRINTK("LCCR0 0x%08x\n", (unsigned int) LCCR0);
+	DPRINTK("LCCR1 0x%08x\n", (unsigned int) LCCR1);
+	DPRINTK("LCCR2 0x%08x\n", (unsigned int) LCCR2);
+	DPRINTK("LCCR3 0x%08x\n", (unsigned int) LCCR3);
+}
+
+static void pxafb_disable_controller(struct pxafb_info *fbi)
+{
+	DECLARE_WAITQUEUE(wait, current);
+
+	DPRINTK("Disabling LCD controller\n");
+
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	add_wait_queue(&fbi->ctrlr_wait, &wait);
+
+	LCSR = 0xffffffff;	/* Clear LCD Status Register */
+	LCCR0 &= ~LCCR0_LDM;	/* Enable LCD Disable Done Interrupt */
+	LCCR0 |= LCCR0_DIS;	/* Disable LCD Controller */
+
+	schedule_timeout(20 * HZ / 1000);
+	remove_wait_queue(&fbi->ctrlr_wait, &wait);
+}
+
+/*
+ *  pxafb_handle_irq: Handle 'LCD DONE' interrupts.
+ */
+static irqreturn_t pxafb_handle_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct pxafb_info *fbi = dev_id;
+	unsigned int lcsr = LCSR;
+
+	if (lcsr & LCSR_LDD) {
+		LCCR0 |= LCCR0_LDM;
+		wake_up(&fbi->ctrlr_wait);
+	}
+
+	LCSR = lcsr;
+	return IRQ_HANDLED;
+}
+
+/*
+ * This function must be called from task context only, since it will
+ * sleep when disabling the LCD controller, or if we get two contending
+ * processes trying to alter state.
+ */
+static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
+{
+	u_int old_state;
+
+	down(&fbi->ctrlr_sem);
+
+	old_state = fbi->state;
+
+	/*
+	 * Hack around fbcon initialisation.
+	 */
+	if (old_state == C_STARTUP && state == C_REENABLE)
+		state = C_ENABLE;
+
+	switch (state) {
+	case C_DISABLE_CLKCHANGE:
+		/*
+		 * Disable controller for clock change.  If the
+		 * controller is already disabled, then do nothing.
+		 */
+		if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
+			fbi->state = state;
+			//TODO __pxafb_lcd_power(fbi, 0);
+			pxafb_disable_controller(fbi);
+		}
+		break;
+
+	case C_DISABLE_PM:
+	case C_DISABLE:
+		/*
+		 * Disable controller
+		 */
+		if (old_state != C_DISABLE) {
+			fbi->state = state;
+			__pxafb_backlight_power(fbi, 0);
+			__pxafb_lcd_power(fbi, 0);
+			if (old_state != C_DISABLE_CLKCHANGE)
+				pxafb_disable_controller(fbi);
+		}
+		break;
+
+	case C_ENABLE_CLKCHANGE:
+		/*
+		 * Enable the controller after clock change.  Only
+		 * do this if we were disabled for the clock change.
+		 */
+		if (old_state == C_DISABLE_CLKCHANGE) {
+			fbi->state = C_ENABLE;
+			pxafb_enable_controller(fbi);
+			//TODO __pxafb_lcd_power(fbi, 1);
+		}
+		break;
+
+	case C_REENABLE:
+		/*
+		 * Re-enable the controller only if it was already
+		 * enabled.  This is so we reprogram the control
+		 * registers.
+		 */
+		if (old_state == C_ENABLE) {
+			pxafb_disable_controller(fbi);
+			pxafb_setup_gpio(fbi);
+			pxafb_enable_controller(fbi);
+		}
+		break;
+
+	case C_ENABLE_PM:
+		/*
+		 * Re-enable the controller after PM.  This is not
+		 * perfect - think about the case where we were doing
+		 * a clock change, and we suspended half-way through.
+		 */
+		if (old_state != C_DISABLE_PM)
+			break;
+		/* fall through */
+
+	case C_ENABLE:
+		/*
+		 * Power up the LCD screen, enable controller, and
+		 * turn on the backlight.
+		 */
+		if (old_state != C_ENABLE) {
+			fbi->state = C_ENABLE;
+			pxafb_setup_gpio(fbi);
+			pxafb_enable_controller(fbi);
+			__pxafb_lcd_power(fbi, 1);
+			__pxafb_backlight_power(fbi, 1);
+		}
+		break;
+	}
+	up(&fbi->ctrlr_sem);
+}
+
+/*
+ * Our LCD controller task (which is called when we blank or unblank)
+ * via keventd.
+ */
+static void pxafb_task(void *dummy)
+{
+	struct pxafb_info *fbi = dummy;
+	u_int state = xchg(&fbi->task_state, -1);
+
+	set_ctrlr_state(fbi, state);
+}
+
+#ifdef CONFIG_CPU_FREQ
+/*
+ * CPU clock speed change handler.  We need to adjust the LCD timing
+ * parameters when the CPU clock is adjusted by the power management
+ * subsystem.
+ *
+ * TODO: Determine why f->new != 10*get_lclk_frequency_10khz()
+ */
+static int
+pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data)
+{
+	struct pxafb_info *fbi = TO_INF(nb, freq_transition);
+	//TODO struct cpufreq_freqs *f = data;
+	u_int pcd;
+
+	switch (val) {
+	case CPUFREQ_PRECHANGE:
+		set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
+		break;
+
+	case CPUFREQ_POSTCHANGE:
+		pcd = get_pcd(fbi->fb.var.pixclock);
+		fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
+		set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
+		break;
+	}
+	return 0;
+}
+
+static int
+pxafb_freq_policy(struct notifier_block *nb, unsigned long val, void *data)
+{
+	struct pxafb_info *fbi = TO_INF(nb, freq_policy);
+	struct fb_var_screeninfo *var = &fbi->fb.var;
+	struct cpufreq_policy *policy = data;
+
+	switch (val) {
+	case CPUFREQ_ADJUST:
+	case CPUFREQ_INCOMPATIBLE:
+		printk(KERN_DEBUG "min dma period: %d ps, "
+			"new clock %d kHz\n", pxafb_display_dma_period(var),
+			policy->max);
+		// TODO: fill in min/max values
+		break;
+#if 0
+	case CPUFREQ_NOTIFY:
+		printk(KERN_ERR "%s: got CPUFREQ_NOTIFY\n", __FUNCTION__);
+		do {} while(0);
+		/* todo: panic if min/max values aren't fulfilled
+		 * [can't really happen unless there's a bug in the
+		 * CPU policy verification process *
+		 */
+		break;
+#endif
+	}
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+/*
+ * Power management hooks.  Note that we won't be called from IRQ context,
+ * unlike the blank functions above, so we may sleep.
+ */
+static int pxafb_suspend(struct device *dev, u32 state, u32 level)
+{
+	struct pxafb_info *fbi = dev_get_drvdata(dev);
+
+	if (level == SUSPEND_DISABLE || level == SUSPEND_POWER_DOWN)
+		set_ctrlr_state(fbi, C_DISABLE_PM);
+	return 0;
+}
+
+static int pxafb_resume(struct device *dev, u32 level)
+{
+	struct pxafb_info *fbi = dev_get_drvdata(dev);
+
+	if (level == RESUME_ENABLE)
+		set_ctrlr_state(fbi, C_ENABLE_PM);
+	return 0;
+}
+#else
+#define pxafb_suspend	NULL
+#define pxafb_resume	NULL
+#endif
+
+/*
+ * pxafb_map_video_memory():
+ *      Allocates the DRAM memory for the frame buffer.  This buffer is
+ *	remapped into a non-cached, non-buffered, memory region to
+ *      allow palette and pixel writes to occur without flushing the
+ *      cache.  Once this area is remapped, all virtual memory
+ *      access to the video memory should occur at the new region.
+ */
+static int __init pxafb_map_video_memory(struct pxafb_info *fbi)
+{
+	u_long palette_mem_size;
+
+	/*
+	 * We reserve one page for the palette, plus the size
+	 * of the framebuffer.
+	 */
+	fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
+	fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
+					      &fbi->map_dma, GFP_KERNEL);
+
+	if (fbi->map_cpu) {
+		/* prevent initial garbage on screen */
+		memset(fbi->map_cpu, 0, fbi->map_size);
+		fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
+		fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
+		/*
+		 * FIXME: this is actually the wrong thing to place in
+		 * smem_start.  But fbdev suffers from the problem that
+		 * it needs an API which doesn't exist (in this case,
+		 * dma_writecombine_mmap)
+		 */
+		fbi->fb.fix.smem_start = fbi->screen_dma;
+
+		fbi->palette_size = fbi->fb.var.bits_per_pixel == 8 ? 256 : 16;
+
+		palette_mem_size = fbi->palette_size * sizeof(u16);
+		DPRINTK("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
+
+		fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
+		fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
+	}
+
+	return fbi->map_cpu ? 0 : -ENOMEM;
+}
+
+static struct pxafb_info * __init pxafb_init_fbinfo(struct device *dev)
+{
+	struct pxafb_info *fbi;
+	void *addr;
+	struct pxafb_mach_info *inf = dev->platform_data;
+
+	/* Alloc the pxafb_info and pseudo_palette in one step */
+	fbi = kmalloc(sizeof(struct pxafb_info) + sizeof(u32) * 16, GFP_KERNEL);
+	if (!fbi)
+		return NULL;
+
+	memset(fbi, 0, sizeof(struct pxafb_info));
+	fbi->dev = dev;
+
+	strcpy(fbi->fb.fix.id, PXA_NAME);
+
+	fbi->fb.fix.type	= FB_TYPE_PACKED_PIXELS;
+	fbi->fb.fix.type_aux	= 0;
+	fbi->fb.fix.xpanstep	= 0;
+	fbi->fb.fix.ypanstep	= 0;
+	fbi->fb.fix.ywrapstep	= 0;
+	fbi->fb.fix.accel	= FB_ACCEL_NONE;
+
+	fbi->fb.var.nonstd	= 0;
+	fbi->fb.var.activate	= FB_ACTIVATE_NOW;
+	fbi->fb.var.height	= -1;
+	fbi->fb.var.width	= -1;
+	fbi->fb.var.accel_flags	= 0;
+	fbi->fb.var.vmode	= FB_VMODE_NONINTERLACED;
+
+	fbi->fb.fbops		= &pxafb_ops;
+	fbi->fb.flags		= FBINFO_DEFAULT;
+	fbi->fb.node		= -1;
+
+	addr = fbi;
+	addr = addr + sizeof(struct pxafb_info);
+	fbi->fb.pseudo_palette	= addr;
+
+	fbi->max_xres			= inf->xres;
+	fbi->fb.var.xres		= inf->xres;
+	fbi->fb.var.xres_virtual	= inf->xres;
+	fbi->max_yres			= inf->yres;
+	fbi->fb.var.yres		= inf->yres;
+	fbi->fb.var.yres_virtual	= inf->yres;
+	fbi->max_bpp			= inf->bpp;
+	fbi->fb.var.bits_per_pixel	= inf->bpp;
+	fbi->fb.var.pixclock		= inf->pixclock;
+	fbi->fb.var.hsync_len		= inf->hsync_len;
+	fbi->fb.var.left_margin		= inf->left_margin;
+	fbi->fb.var.right_margin	= inf->right_margin;
+	fbi->fb.var.vsync_len		= inf->vsync_len;
+	fbi->fb.var.upper_margin	= inf->upper_margin;
+	fbi->fb.var.lower_margin	= inf->lower_margin;
+	fbi->fb.var.sync		= inf->sync;
+	fbi->fb.var.grayscale		= inf->cmap_greyscale;
+	fbi->cmap_inverse		= inf->cmap_inverse;
+	fbi->cmap_static		= inf->cmap_static;
+	fbi->lccr0			= inf->lccr0;
+	fbi->lccr3			= inf->lccr3;
+	fbi->state			= C_STARTUP;
+	fbi->task_state			= (u_char)-1;
+	fbi->fb.fix.smem_len		= fbi->max_xres * fbi->max_yres *
+					  fbi->max_bpp / 8;
+
+	init_waitqueue_head(&fbi->ctrlr_wait);
+	INIT_WORK(&fbi->task, pxafb_task, fbi);
+	init_MUTEX(&fbi->ctrlr_sem);
+
+	return fbi;
+}
+
+#ifdef CONFIG_FB_PXA_PARAMETERS
+static int __init pxafb_parse_options(struct device *dev, char *options)
+{
+	struct pxafb_mach_info *inf = dev->platform_data;
+	char *this_opt;
+
+        if (!options || !*options)
+                return 0;
+
+	dev_dbg(dev, "options are \"%s\"\n", options ? options : "null");
+
+	/* could be made table driven or similar?... */
+        while ((this_opt = strsep(&options, ",")) != NULL) {
+                if (!strncmp(this_opt, "mode:", 5)) {
+			const char *name = this_opt+5;
+			unsigned int namelen = strlen(name);
+			int res_specified = 0, bpp_specified = 0;
+			unsigned int xres = 0, yres = 0, bpp = 0;
+			int yres_specified = 0;
+			int i;
+			for (i = namelen-1; i >= 0; i--) {
+				switch (name[i]) {
+				case '-':
+					namelen = i;
+					if (!bpp_specified && !yres_specified) {
+						bpp = simple_strtoul(&name[i+1], NULL, 0);
+						bpp_specified = 1;
+					} else
+						goto done;
+					break;
+				case 'x':
+					if (!yres_specified) {
+						yres = simple_strtoul(&name[i+1], NULL, 0);
+						yres_specified = 1;
+					} else
+						goto done;
+					break;
+				case '0'...'9':
+					break;
+				default:
+					goto done;
+				}
+			}
+			if (i < 0 && yres_specified) {
+				xres = simple_strtoul(name, NULL, 0);
+				res_specified = 1;
+			}
+		done:
+			if (res_specified) {
+				dev_info(dev, "overriding resolution: %dx%d\n", xres, yres);
+				inf->xres = xres; inf->yres = yres;
+			}
+			if (bpp_specified)
+				switch (bpp) {
+				case 1:
+				case 2:
+				case 4:
+				case 8:
+				case 16:
+					inf->bpp = bpp;
+					dev_info(dev, "overriding bit depth: %d\n", bpp);
+					break;
+				default:
+					dev_err(dev, "Depth %d is not valid\n", bpp);
+				}
+                } else if (!strncmp(this_opt, "pixclock:", 9)) {
+                        inf->pixclock = simple_strtoul(this_opt+9, NULL, 0);
+			dev_info(dev, "override pixclock: %ld\n", inf->pixclock);
+                } else if (!strncmp(this_opt, "left:", 5)) {
+                        inf->left_margin = simple_strtoul(this_opt+5, NULL, 0);
+			dev_info(dev, "override left: %u\n", inf->left_margin);
+                } else if (!strncmp(this_opt, "right:", 6)) {
+                        inf->right_margin = simple_strtoul(this_opt+6, NULL, 0);
+			dev_info(dev, "override right: %u\n", inf->right_margin);
+                } else if (!strncmp(this_opt, "upper:", 6)) {
+                        inf->upper_margin = simple_strtoul(this_opt+6, NULL, 0);
+			dev_info(dev, "override upper: %u\n", inf->upper_margin);
+                } else if (!strncmp(this_opt, "lower:", 6)) {
+                        inf->lower_margin = simple_strtoul(this_opt+6, NULL, 0);
+			dev_info(dev, "override lower: %u\n", inf->lower_margin);
+                } else if (!strncmp(this_opt, "hsynclen:", 9)) {
+                        inf->hsync_len = simple_strtoul(this_opt+9, NULL, 0);
+			dev_info(dev, "override hsynclen: %u\n", inf->hsync_len);
+                } else if (!strncmp(this_opt, "vsynclen:", 9)) {
+                        inf->vsync_len = simple_strtoul(this_opt+9, NULL, 0);
+			dev_info(dev, "override vsynclen: %u\n", inf->vsync_len);
+                } else if (!strncmp(this_opt, "hsync:", 6)) {
+                        if (simple_strtoul(this_opt+6, NULL, 0) == 0) {
+				dev_info(dev, "override hsync: Active Low\n");
+				inf->sync &= ~FB_SYNC_HOR_HIGH_ACT;
+			} else {
+				dev_info(dev, "override hsync: Active High\n");
+				inf->sync |= FB_SYNC_HOR_HIGH_ACT;
+			}
+                } else if (!strncmp(this_opt, "vsync:", 6)) {
+                        if (simple_strtoul(this_opt+6, NULL, 0) == 0) {
+				dev_info(dev, "override vsync: Active Low\n");
+				inf->sync &= ~FB_SYNC_VERT_HIGH_ACT;
+			} else {
+				dev_info(dev, "override vsync: Active High\n");
+				inf->sync |= FB_SYNC_VERT_HIGH_ACT;
+			}
+                } else if (!strncmp(this_opt, "dpc:", 4)) {
+                        if (simple_strtoul(this_opt+4, NULL, 0) == 0) {
+				dev_info(dev, "override double pixel clock: false\n");
+				inf->lccr3 &= ~LCCR3_DPC;
+			} else {
+				dev_info(dev, "override double pixel clock: true\n");
+				inf->lccr3 |= LCCR3_DPC;
+			}
+                } else if (!strncmp(this_opt, "outputen:", 9)) {
+                        if (simple_strtoul(this_opt+9, NULL, 0) == 0) {
+				dev_info(dev, "override output enable: active low\n");
+				inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnL;
+			} else {
+				dev_info(dev, "override output enable: active high\n");
+				inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnH;
+			}
+                } else if (!strncmp(this_opt, "pixclockpol:", 12)) {
+                        if (simple_strtoul(this_opt+12, NULL, 0) == 0) {
+				dev_info(dev, "override pixel clock polarity: falling edge\n");
+				inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixFlEdg;
+			} else {
+				dev_info(dev, "override pixel clock polarity: rising edge\n");
+				inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixRsEdg;
+			}
+                } else if (!strncmp(this_opt, "color", 5)) {
+			inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Color;
+                } else if (!strncmp(this_opt, "mono", 4)) {
+			inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Mono;
+                } else if (!strncmp(this_opt, "active", 6)) {
+			inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Act;
+                } else if (!strncmp(this_opt, "passive", 7)) {
+			inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Pas;
+                } else if (!strncmp(this_opt, "single", 6)) {
+			inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Sngl;
+                } else if (!strncmp(this_opt, "dual", 4)) {
+			inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Dual;
+                } else if (!strncmp(this_opt, "4pix", 4)) {
+			inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono;
+                } else if (!strncmp(this_opt, "8pix", 4)) {
+			inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono;
+		} else {
+			dev_err(dev, "unknown option: %s\n", this_opt);
+			return -EINVAL;
+		}
+        }
+        return 0;
+
+}
+#endif
+
+int __init pxafb_probe(struct device *dev)
+{
+	struct pxafb_info *fbi;
+	struct pxafb_mach_info *inf;
+	int ret;
+
+	dev_dbg(dev, "pxafb_probe\n");
+
+	inf = dev->platform_data;
+	ret = -ENOMEM;
+	fbi = NULL;
+	if (!inf)
+		goto failed;
+
+#ifdef CONFIG_FB_PXA_PARAMETERS
+	ret = pxafb_parse_options(dev, g_options);
+	if (ret < 0)
+		goto failed;
+#endif
+
+#ifdef DEBUG_VAR
+        /* Check for various illegal bit-combinations. Currently only
+	 * a warning is given. */
+
+        if (inf->lccr0 & LCCR0_INVALID_CONFIG_MASK)
+                dev_warn(dev, "machine LCCR0 setting contains illegal bits: %08x\n",
+                        inf->lccr0 & LCCR0_INVALID_CONFIG_MASK);
+        if (inf->lccr3 & LCCR3_INVALID_CONFIG_MASK)
+                dev_warn(dev, "machine LCCR3 setting contains illegal bits: %08x\n",
+                        inf->lccr3 & LCCR3_INVALID_CONFIG_MASK);
+        if (inf->lccr0 & LCCR0_DPD &&
+	    ((inf->lccr0 & LCCR0_PAS) != LCCR0_Pas ||
+	     (inf->lccr0 & LCCR0_SDS) != LCCR0_Sngl ||
+	     (inf->lccr0 & LCCR0_CMS) != LCCR0_Mono))
+                dev_warn(dev, "Double Pixel Data (DPD) mode is only valid in passive mono"
+			 " single panel mode\n");
+        if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Act &&
+	    (inf->lccr0 & LCCR0_SDS) == LCCR0_Dual)
+                dev_warn(dev, "Dual panel only valid in passive mode\n");
+        if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Pas &&
+             (inf->upper_margin || inf->lower_margin))
+                dev_warn(dev, "Upper and lower margins must be 0 in passive mode\n");
+#endif
+
+	dev_dbg(dev, "got a %dx%dx%d LCD\n",inf->xres, inf->yres, inf->bpp);
+	if (inf->xres == 0 || inf->yres == 0 || inf->bpp == 0) {
+		dev_err(dev, "Invalid resolution or bit depth\n");
+		ret = -EINVAL;
+		goto failed;
+	}
+	pxafb_backlight_power = inf->pxafb_backlight_power;
+	pxafb_lcd_power = inf->pxafb_lcd_power;
+	fbi = pxafb_init_fbinfo(dev);
+	if (!fbi) {
+		dev_err(dev, "Failed to initialize framebuffer device\n");
+		ret = -ENOMEM; // only reason for pxafb_init_fbinfo to fail is kmalloc
+		goto failed;
+	}
+
+	/* Initialize video memory */
+	ret = pxafb_map_video_memory(fbi);
+	if (ret) {
+		dev_err(dev, "Failed to allocate video RAM: %d\n", ret);
+		ret = -ENOMEM;
+		goto failed;
+	}
+	/* enable LCD controller clock */
+	pxa_set_cken(CKEN16_LCD, 1);
+
+	ret = request_irq(IRQ_LCD, pxafb_handle_irq, SA_INTERRUPT, "LCD", fbi);
+	if (ret) {
+		dev_err(dev, "request_irq failed: %d\n", ret);
+		ret = -EBUSY;
+		goto failed;
+	}
+
+	/*
+	 * This makes sure that our colour bitfield
+	 * descriptors are correctly initialised.
+	 */
+	pxafb_check_var(&fbi->fb.var, &fbi->fb);
+	pxafb_set_par(&fbi->fb);
+
+	dev_set_drvdata(dev, fbi);
+
+	ret = register_framebuffer(&fbi->fb);
+	if (ret < 0) {
+		dev_err(dev, "Failed to register framebuffer device: %d\n", ret);
+		goto failed;
+	}
+
+#ifdef CONFIG_PM
+	// TODO
+#endif
+
+#ifdef CONFIG_CPU_FREQ
+	fbi->freq_transition.notifier_call = pxafb_freq_transition;
+	fbi->freq_policy.notifier_call = pxafb_freq_policy;
+	cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER);
+	cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER);
+#endif
+
+	/*
+	 * Ok, now enable the LCD controller
+	 */
+	set_ctrlr_state(fbi, C_ENABLE);
+
+	return 0;
+
+failed:
+	dev_set_drvdata(dev, NULL);
+	kfree(fbi);
+	return ret;
+}
+
+static struct device_driver pxafb_driver = {
+	.name		= "pxa2xx-fb",
+	.bus		= &platform_bus_type,
+	.probe		= pxafb_probe,
+#ifdef CONFIG_PM
+	.suspend	= pxafb_suspend,
+	.resume		= pxafb_resume,
+#endif
+};
+
+#ifndef MODULE
+int __devinit pxafb_setup(char *options)
+{
+# ifdef CONFIG_FB_PXA_PARAMETERS
+	strlcpy(g_options, options, sizeof(g_options));
+# endif
+	return 0;
+}
+#else
+# ifdef CONFIG_FB_PXA_PARAMETERS
+module_param_string(options, g_options, sizeof(g_options), 0);
+MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.txt)");
+# endif
+#endif
+
+int __devinit pxafb_init(void)
+{
+#ifndef MODULE
+	char *option = NULL;
+
+	if (fb_get_options("pxafb", &option))
+		return -ENODEV;
+	pxafb_setup(option);
+#endif
+	return driver_register(&pxafb_driver);
+}
+
+module_init(pxafb_init);
+
+MODULE_DESCRIPTION("loadable framebuffer driver for PXA");
+MODULE_LICENSE("GPL");