8610: Add 8610 DIU display driver

1280x1024 and 1024x768 @ 32 bpp are supported now.
DVI, Single-link LVDS, Double-link LVDS are all supported.

Environmental variable "monitor" is used to specify monitor port.

A new command "diufb" is introduced to reinitialize monitor
and display a BMP file in the memory. So far, 1-bit, 4-bit,
8-bit and 24-bit BMP formats are supported.

    diufb init
        - initialize the diu driver
    Enable the port specified in the environmental variable "monitor"

    diufb addr
        - display bmp file in memory.
    The bmp image should be no bigger than the resolution, 1280x1024
    for DVI and double-link LVDS, 1024x768 for single-link LVDS.

Note, this driver allocate memory but doesn't free it after use
It is written on purpose -- to avoid a failure of reallocation
due to memory fragement.

ECC of DDR is disabled for DIU performance. L2 data cache is also disabled.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Jon loeliger <jdl@freescale.com>

3 files changed, 694 insertions, 1 deletions

diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index 44f613e..9cee9f1 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -31,7 +31,9 @@ LIB	= $(obj)lib$(VENDOR).a
 
 COBJS	:= sys_eeprom.o	\
 	   pixis.o	\
-	   pq-mds-pib.o
+	   pq-mds-pib.o \
+	   fsl_logo_bmp.o \
+	   fsl_diu_fb.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
diff --git a/board/freescale/common/fsl_diu_fb.c b/board/freescale/common/fsl_diu_fb.c
new file mode 100644
index 0000000..a9999d3
--- /dev/null
+++ b/board/freescale/common/fsl_diu_fb.c
@@ -0,0 +1,656 @@
+/*
+ * Copyright 2007 Freescale Semiconductor, Inc.
+ * York Sun <yorksun@freescale.com>
+ *
+ * FSL DIU Framebuffer driver
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+#include <common.h>
+#include <i2c.h>
+#include <malloc.h>
+
+#ifdef CONFIG_FSL_DIU_FB
+
+#include "fsl_diu_fb.h"
+
+
+#ifdef DEBUG
+#define DPRINTF(fmt, args...) printf("%s: " fmt,__FUNCTION__,## args)
+#else
+#define DPRINTF(fmt, args...)
+#endif
+
+struct fb_var_screeninfo {
+	unsigned int xres;		/* visible resolution		*/
+	unsigned int yres;
+
+	unsigned int bits_per_pixel;	/* guess what			*/
+
+	/* Timing: All values in pixclocks, except pixclock (of course) */
+	unsigned int pixclock;		/* pixel clock in ps (pico seconds) */
+	unsigned int left_margin;	/* time from sync to picture	*/
+	unsigned int right_margin;	/* time from picture to sync	*/
+	unsigned int upper_margin;	/* time from sync to picture	*/
+	unsigned int lower_margin;
+	unsigned int hsync_len;		/* length of horizontal sync	*/
+	unsigned int vsync_len;		/* length of vertical sync	*/
+	unsigned int sync;		/* see FB_SYNC_*		*/
+	unsigned int vmode;		/* see FB_VMODE_*		*/
+	unsigned int rotate;		/* angle we rotate counter clockwise */
+};
+
+struct fb_info {
+	struct fb_var_screeninfo var;	/* Current var */
+	unsigned long smem_start;	/* Start of frame buffer mem */
+					/* (physical address) */
+	unsigned int smem_len;		/* Length of frame buffer mem */
+	unsigned int type;		/* see FB_TYPE_*		*/
+	unsigned int line_length;	/* length of a line in bytes    */
+
+	char *screen_base;
+	unsigned long screen_size;
+	int logo_height;
+	unsigned int logo_size;
+};
+
+struct fb_videomode {
+	const char *name;	/* optional */
+	unsigned int refresh;		/* optional */
+	unsigned int xres;
+	unsigned int yres;
+	unsigned int pixclock;
+	unsigned int left_margin;
+	unsigned int right_margin;
+	unsigned int upper_margin;
+	unsigned int lower_margin;
+	unsigned int hsync_len;
+	unsigned int vsync_len;
+	unsigned int sync;
+	unsigned int vmode;
+	unsigned int flag;
+};
+
+#define FB_SYNC_VERT_HIGH_ACT	2	/* vertical sync high active	*/
+#define FB_SYNC_COMP_HIGH_ACT	8	/* composite sync high active   */
+#define FB_VMODE_NONINTERLACED  0	/* non interlaced */
+
+/*
+ * These parameters give default parameters
+ * for video output 1024x768,
+ * FIXME - change timing to proper amounts
+ * hsync 31.5kHz, vsync 60Hz
+ */
+static struct fb_videomode fsl_diu_mode_1024 = {
+	.refresh	= 60,
+	.xres		= 1024,
+	.yres		= 768,
+	.pixclock	= 15385,
+	.left_margin	= 160,
+	.right_margin	= 24,
+	.upper_margin	= 29,
+	.lower_margin	= 3,
+	.hsync_len	= 136,
+	.vsync_len	= 6,
+	.sync		= FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	.vmode		= FB_VMODE_NONINTERLACED
+};
+
+static struct fb_videomode fsl_diu_mode_1280 = {
+	.name		= "1280x1024-60",
+	.refresh	= 60,
+	.xres		= 1280,
+	.yres		= 1024,
+	.pixclock	= 9375,
+	.left_margin	= 38,
+	.right_margin	= 128,
+	.upper_margin	= 2,
+	.lower_margin	= 7,
+	.hsync_len	= 216,
+	.vsync_len	= 37,
+	.sync		= FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	.vmode		= FB_VMODE_NONINTERLACED
+};
+
+/*
+ * These are the fields of area descriptor(in DDR memory) for every plane
+ */
+struct diu_ad {
+	/* Word 0(32-bit) in DDR memory */
+	unsigned int pix_fmt; /* hard coding pixel format */
+	/* Word 1(32-bit) in DDR memory */
+	unsigned int addr;
+	/* Word 2(32-bit) in DDR memory */
+	unsigned int src_size_g_alpha;
+	/* Word 3(32-bit) in DDR memory */
+	unsigned int aoi_size;
+	/* Word 4(32-bit) in DDR memory */
+	unsigned int offset_xyi;
+	/* Word 5(32-bit) in DDR memory */
+	unsigned int offset_xyd;
+	/* Word 6(32-bit) in DDR memory */
+	unsigned int ckmax_r:8;
+	unsigned int ckmax_g:8;
+	unsigned int ckmax_b:8;
+	unsigned int res9:8;
+	/* Word 7(32-bit) in DDR memory */
+	unsigned int ckmin_r:8;
+	unsigned int ckmin_g:8;
+	unsigned int ckmin_b:8;
+	unsigned int res10:8;
+	/* Word 8(32-bit) in DDR memory */
+	unsigned int next_ad;
+	/* Word 9(32-bit) in DDR memory, just for 64-bit aligned */
+	unsigned int res1;
+	unsigned int res2;
+	unsigned int res3;
+}__attribute__ ((packed));
+
+/*
+ * DIU register map
+ */
+struct diu {
+	unsigned int desc[3];
+	unsigned int gamma;
+	unsigned int pallete;
+	unsigned int cursor;
+	unsigned int curs_pos;
+	unsigned int diu_mode;
+	unsigned int bgnd;
+	unsigned int bgnd_wb;
+	unsigned int disp_size;
+	unsigned int wb_size;
+	unsigned int wb_mem_addr;
+	unsigned int hsyn_para;
+	unsigned int vsyn_para;
+	unsigned int syn_pol;
+	unsigned int thresholds;
+	unsigned int int_status;
+	unsigned int int_mask;
+	unsigned int colorbar[8];
+	unsigned int filling;
+	unsigned int plut;
+} __attribute__ ((packed));
+
+struct diu_hw {
+	struct diu *diu_reg;
+	volatile unsigned int mode;		/* DIU operation mode */
+};
+
+struct diu_addr {
+	unsigned char  *  paddr;	/* Virtual address */
+	unsigned int 	   offset;
+};
+
+#define FSL_DIU_BASE_OFFSET	0x2C000	/* Offset of Display Interface Unit */
+
+/*
+ * Modes of operation of DIU
+ */
+#define MFB_MODE0	0	/* DIU off */
+#define MFB_MODE1	1	/* All three planes output to display */
+#define MFB_MODE2	2	/* Plane 1 to display,
+				 * planes 2+3 written back to memory */
+#define MFB_MODE3	3	/* All three planes written back to memory */
+#define MFB_MODE4	4	/* Color bar generation */
+
+#define MAX_CURS		32
+
+
+
+static struct fb_info fsl_fb_info;
+static struct diu_addr gamma, cursor;
+static struct diu_ad fsl_diu_fb_ad __attribute__ ((aligned(32)));
+static struct diu_ad dummy_ad __attribute__ ((aligned(32)));
+static unsigned char *dummy_fb;
+static struct diu_hw dr = {
+	.mode = MFB_MODE1,
+};
+
+int fb_enabled = 0;
+int fb_initialized = 0;
+const int default_xres = 1280;
+const int default_pixel_format = 0x88882317;
+
+static int map_video_memory(struct fb_info *info, unsigned long bytes_align);
+static void enable_lcdc(void);
+static void disable_lcdc(void);
+static int fsl_diu_enable_panel(struct fb_info *info);
+static int fsl_diu_disable_panel(struct fb_info *info);
+static int allocate_buf(struct diu_addr *buf, u32 size, u32 bytes_align);
+static u32 get_busfreq(void);
+
+
+int fsl_diu_init(int xres,
+		 unsigned int pixel_format,
+		 int gamma_fix,
+		 unsigned char *splash_bmp)
+{
+	struct fb_videomode *fsl_diu_mode_db;
+	struct diu_ad *ad = &fsl_diu_fb_ad;
+	struct diu *hw;
+	struct fb_info *info = &fsl_fb_info;
+	struct fb_var_screeninfo *var = &info->var;
+	volatile immap_t *immap = (immap_t *)CFG_IMMR;
+	volatile ccsr_gur_t *gur = &immap->im_gur;
+	volatile unsigned int *guts_clkdvdr = &gur->clkdvdr;
+	unsigned char *gamma_table_base;
+	unsigned int i, j;
+	unsigned long speed_ccb, temp, pixval;
+
+	DPRINTF("Enter fsl_diu_init\n");
+	dr.diu_reg = (struct diu *) (CFG_IMMR + FSL_DIU_BASE_OFFSET);
+	hw = (struct diu *) dr.diu_reg;
+
+	disable_lcdc();
+
+	if (xres == 1280) {
+		fsl_diu_mode_db = &fsl_diu_mode_1280;
+	} else {
+		fsl_diu_mode_db = &fsl_diu_mode_1024;
+	}
+
+	if (0 == fb_initialized) {
+		allocate_buf(&gamma, 768, 32);
+		DPRINTF("gamma is allocated @ 0x%x\n",
+			(unsigned int)gamma.paddr);
+		allocate_buf(&cursor, MAX_CURS * MAX_CURS * 2, 32);
+		DPRINTF("curosr is allocated @ 0x%x\n",
+			(unsigned int)cursor.paddr);
+
+		/* create a dummy fb and dummy ad */
+		dummy_fb = malloc(64);
+		if (NULL == dummy_fb) {
+			printf("Cannot allocate dummy fb\n");
+			return -1;
+		}
+		dummy_ad.addr = cpu_to_le32((unsigned int)dummy_fb);
+		dummy_ad.pix_fmt = 0x88882317;
+		dummy_ad.src_size_g_alpha = 0x04400000;	/* alpha = 0 */
+		dummy_ad.aoi_size = 0x02000400;
+		dummy_ad.offset_xyi = 0;
+		dummy_ad.offset_xyd = 0;
+		dummy_ad.next_ad = 0;
+		/* Memory allocation for framebuffer */
+		if (map_video_memory(info, 32)) {
+			printf("Unable to allocate fb memory 1\n");
+			return -1;
+		}
+	} else {
+		memset(info->screen_base, 0, info->smem_len);
+	}
+
+	dr.diu_reg->desc[0] = (unsigned int) &dummy_ad;
+	dr.diu_reg->desc[1] = (unsigned int) &dummy_ad;
+	dr.diu_reg->desc[2] = (unsigned int) &dummy_ad;
+	DPRINTF("dummy dr.diu_reg->desc[0] = 0x%x\n", dr.diu_reg->desc[0]);
+	DPRINTF("dummy desc[0] = 0x%x\n", hw->desc[0]);
+
+	/* read mode info */
+	var->xres = fsl_diu_mode_db->xres;
+	var->yres = fsl_diu_mode_db->yres;
+	var->bits_per_pixel = 32;
+	var->pixclock = fsl_diu_mode_db->pixclock;
+	var->left_margin = fsl_diu_mode_db->left_margin;
+	var->right_margin = fsl_diu_mode_db->right_margin;
+	var->upper_margin = fsl_diu_mode_db->upper_margin;
+	var->lower_margin = fsl_diu_mode_db->lower_margin;
+	var->hsync_len = fsl_diu_mode_db->hsync_len;
+	var->vsync_len = fsl_diu_mode_db->vsync_len;
+	var->sync = fsl_diu_mode_db->sync;
+	var->vmode = fsl_diu_mode_db->vmode;
+	info->line_length = var->xres * var->bits_per_pixel / 8;
+	info->logo_size = 0;
+	info->logo_height = 0;
+
+	ad->pix_fmt = pixel_format;
+	ad->addr    = cpu_to_le32((unsigned int)info->screen_base);
+	ad->src_size_g_alpha
+			= cpu_to_le32((var->yres << 12) | var->xres);
+	/* fix me. AOI should not be greater than display size */
+	ad->aoi_size 	= cpu_to_le32(( var->yres << 16) |  var->xres);
+	ad->offset_xyi = 0;
+	ad->offset_xyd = 0;
+
+	/* Disable chroma keying function */
+	ad->ckmax_r = 0;
+	ad->ckmax_g = 0;
+	ad->ckmax_b = 0;
+
+	ad->ckmin_r = 255;
+	ad->ckmin_g = 255;
+	ad->ckmin_b = 255;
+
+	gamma_table_base = gamma.paddr;
+	DPRINTF("gamma_table_base is allocated @ 0x%x\n",
+		(unsigned int)gamma_table_base);
+
+	/* Prep for DIU init  - gamma table */
+
+	for (i = 0; i <= 2; i++)
+		for (j = 0; j <= 255; j++)
+			*gamma_table_base++ = j;
+
+	if (gamma_fix == 1) {	/* fix the gamma */
+		DPRINTF("Fix gamma table\n");
+		gamma_table_base = gamma.paddr;
+		for (i = 0; i < 256*3; i++) {
+			gamma_table_base[i] = (gamma_table_base[i] << 2)
+				| ((gamma_table_base[i] >> 6) & 0x03);
+		}
+	}
+
+	DPRINTF("update-lcdc: HW - %p\n Disabling DIU\n", hw);
+
+	/* Program DIU registers */
+
+	hw->gamma = (unsigned int) gamma.paddr;
+	hw->cursor= (unsigned int) cursor.paddr;
+	hw->bgnd = 0x007F7F7F;				/* BGND */
+	hw->bgnd_wb = 0; 				/* BGND_WB */
+	hw->disp_size = var->yres << 16 | var->xres;	/* DISP SIZE */
+	hw->wb_size = 0;				/* WB SIZE */
+	hw->wb_mem_addr = 0;				/* WB MEM ADDR */
+	hw->hsyn_para = var->left_margin << 22 |	/* BP_H */
+			var->hsync_len << 11   |	/* PW_H */
+			var->right_margin;		/* FP_H */
+	hw->vsyn_para = var->upper_margin << 22 |	/* BP_V */
+			var->vsync_len << 11    |	/* PW_V  */
+			var->lower_margin;		/* FP_V  */
+
+	/* Pixel Clock configuration */
+	DPRINTF("DIU: Bus Frequency = %d\n", get_busfreq());
+	speed_ccb = get_busfreq();
+
+	DPRINTF("DIU pixclock in ps - %d\n", var->pixclock);
+	temp = 1;
+	temp *= 1000000000;
+	temp /= var->pixclock;
+	temp *= 1000;
+	pixval = speed_ccb / temp;
+	DPRINTF("DIU pixval = %lu\n", pixval);
+
+	hw->syn_pol = 0;			/* SYNC SIGNALS POLARITY */
+	hw->thresholds = 0x00037800;		/* The Thresholds */
+	hw->int_status = 0;			/* INTERRUPT STATUS */
+	hw->int_mask = 0;			/* INT MASK */
+	hw->plut = 0x01F5F666;
+
+	/* Modify PXCLK in GUTS CLKDVDR */
+	DPRINTF("DIU: Current value of CLKDVDR = 0x%08x\n", *guts_clkdvdr);
+	temp = *guts_clkdvdr & 0x2000FFFF;
+	*guts_clkdvdr = temp;				/* turn off clock */
+	*guts_clkdvdr = temp | 0x80000000 | ((pixval & 0x1F) << 16);
+	DPRINTF("DIU: Modified value of CLKDVDR = 0x%08x\n", *guts_clkdvdr);
+
+	fb_initialized = 1;
+
+	if (splash_bmp) {
+		info->logo_height = fsl_diu_display_bmp(splash_bmp, 0, 0, 0);
+		info->logo_size = info->logo_height * info->line_length;
+		DPRINTF("logo height %d, logo_size 0x%x\n",
+			info->logo_height,info->logo_size);
+	}
+
+	/* Enable the DIU */
+	fsl_diu_enable_panel(info);
+	enable_lcdc();
+
+	return 0;
+}
+
+char *fsl_fb_open(struct fb_info **info)
+{
+	*info = &fsl_fb_info;
+	return (char *) ((unsigned int)(*info)->screen_base
+			 + (*info)->logo_size);
+}
+
+void fsl_diu_close(void)
+{
+	struct fb_info *info = &fsl_fb_info;
+	fsl_diu_disable_panel(info);
+}
+
+static int fsl_diu_enable_panel(struct fb_info *info)
+{
+	struct diu *hw = dr.diu_reg;
+	struct diu_ad *ad = &fsl_diu_fb_ad;
+
+	DPRINTF("Entered: enable_panel\n");
+	if (hw->desc[0] != (unsigned int)ad)
+		hw->desc[0] = (unsigned int)ad;
+	DPRINTF("desc[0] = 0x%x\n", hw->desc[0]);
+	return 0;
+}
+
+static int fsl_diu_disable_panel(struct fb_info *info)
+{
+	struct diu *hw = dr.diu_reg;
+
+	DPRINTF("Entered: disable_panel\n");
+	if (hw->desc[0] != (unsigned int)&dummy_ad)
+		hw->desc[0] = (unsigned int)&dummy_ad;
+	return 0;
+}
+
+static int map_video_memory(struct fb_info *info, unsigned long bytes_align)
+{
+	unsigned long offset;
+	unsigned long mask;
+
+	DPRINTF("Entered: map_video_memory\n");
+	/* allocate maximum 1280*1024 with 32bpp */
+	info->smem_len = 1280 * 4 *1024 + bytes_align;
+	DPRINTF("MAP_VIDEO_MEMORY: smem_len = %d\n", info->smem_len);
+	info->screen_base = malloc(info->smem_len);
+	if (info->screen_base == NULL) {
+		printf("Unable to allocate fb memory\n");
+		return -1;
+	}
+	info->smem_start = (unsigned int) info->screen_base;
+	mask = bytes_align - 1;
+	offset = (unsigned long)info->screen_base & mask;
+	if (offset) {
+		info->screen_base += offset;
+		info->smem_len = info->smem_len - (bytes_align - offset);
+	} else
+		info->smem_len = info->smem_len - bytes_align;
+
+	info->screen_size = info->smem_len;
+
+	DPRINTF("Allocated fb @ 0x%08lx, size=%d.\n",
+		info->smem_start, info->smem_len);
+
+	return 0;
+}
+
+static void enable_lcdc(void)
+{
+	struct diu *hw = dr.diu_reg;
+
+	DPRINTF("Entered: enable_lcdc, fb_enabled = %d\n", fb_enabled);
+	if (!fb_enabled) {
+		hw->diu_mode = dr.mode;
+		fb_enabled++;
+	}
+	DPRINTF("diu_mode = %d\n", hw->diu_mode);
+}
+
+static void disable_lcdc(void)
+{
+	struct diu *hw = dr.diu_reg;
+
+	DPRINTF("Entered: disable_lcdc, fb_enabled = %d\n", fb_enabled);
+	if (fb_enabled) {
+		hw->diu_mode = 0;
+		fb_enabled = 0;
+	}
+}
+
+static u32 get_busfreq(void)
+{
+	u32 fs_busfreq = 0;
+
+	fs_busfreq = get_bus_freq(0);
+	return fs_busfreq;
+}
+
+/*
+ * Align to 64-bit(8-byte), 32-byte, etc.
+ */
+static int allocate_buf(struct diu_addr *buf, u32 size, u32 bytes_align)
+{
+	u32 offset, ssize;
+	u32 mask;
+
+	DPRINTF("Entered: allocate_buf\n");
+	ssize = size + bytes_align;
+	buf->paddr = malloc(ssize);
+	if (!buf->paddr)
+		return -1;
+
+	memset(buf->paddr, 0, ssize);
+	mask = bytes_align - 1;
+	offset = (u32)buf->paddr & mask;
+	if (offset) {
+		buf->offset = bytes_align - offset;
+		buf->paddr = (unsigned char *) ((u32)buf->paddr + offset);
+	} else
+		buf->offset = 0;
+	return 0;
+}
+
+int fsl_diu_display_bmp(unsigned char *bmp,
+			int xoffset,
+			int yoffset,
+			int transpar)
+{
+	struct fb_info *info = &fsl_fb_info;
+	unsigned char r, g, b;
+	unsigned int *fb_t, val;
+	unsigned char *bitmap;
+	unsigned int palette[256];
+	int width, height, bpp, ncolors, raster, offset, x, y, i, k, cpp;
+
+	if (!bmp) {
+		printf("Must supply a bitmap address\n");
+		return 0;
+	}
+
+	raster = bmp[10] + (bmp[11] << 8) + (bmp[12] << 16) + (bmp[13] << 24);
+	width  = (bmp[21] << 24) | (bmp[20] << 16) | (bmp[19] << 8) | bmp[18];
+	height = (bmp[25] << 24) | (bmp[24] << 16) | (bmp[23] << 8) | bmp[22];
+	bpp  = (bmp[29] <<  8) | (bmp[28]);
+	ncolors = bmp[46] + (bmp[47] << 8) + (bmp[48] << 16) + (bmp[49] << 24);
+	bitmap   = bmp + raster;
+	cpp = info->var.bits_per_pixel / 8;
+
+	DPRINTF("bmp = 0x%08x\n", (unsigned int)bmp);
+	DPRINTF("bitmap = 0x%08x\n", (unsigned int)bitmap);
+	DPRINTF("width = %d\n", width);
+	DPRINTF("height = %d\n", height);
+	DPRINTF("bpp = %d\n", bpp);
+	DPRINTF("ncolors = %d\n", ncolors);
+
+	DPRINTF("xres = %d\n", info->var.xres);
+	DPRINTF("yres = %d\n", info->var.yres);
+	DPRINTF("Screen_base = 0x%x\n", (unsigned int)info->screen_base);
+
+	if (((width+xoffset) > info->var.xres) ||
+	    ((height+yoffset) > info->var.yres)) {
+		printf("bitmap is out of range, image too large or too much offset\n");
+		return 0;
+	}
+	if (bpp < 24) {
+		for (i = 0, offset = 54; i < ncolors; i++, offset += 4)
+			palette[i] = (bmp[offset+2] << 16)
+				+ (bmp[offset+1] << 8) + bmp[offset];
+	}
+
+	switch (bpp) {
+	case 1:
+		for (y = height - 1; y >= 0; y--) {
+			fb_t = (unsigned int *) ((unsigned int)info->screen_base + (((y+yoffset) * info->var.xres) + xoffset)*cpp);
+			for (x = 0; x < width; x += 8) {
+				b = *bitmap++;
+				for (k = 0; k < 8; k++) {
+					if (b & 0x80)
+						*fb_t = palette[1];
+					else
+						*fb_t = palette[0];
+					b = b << 1;
+				}
+			}
+			for (i = (width / 2) % 4; i > 0; i--)
+				bitmap++;
+		}
+		break;
+	case 4:
+		for (y = height - 1; y >= 0; y--) {
+			fb_t = (unsigned int *) ((unsigned int)info->screen_base + (((y+yoffset) * info->var.xres) + xoffset)*cpp);
+			for (x = 0; x < width; x += 2) {
+				b = *bitmap++;
+				r = (b >> 4) & 0x0F;
+				g =  b & 0x0F;
+				*fb_t++ = palette[r];
+				*fb_t++ = palette[g];
+			}
+			for (i = (width / 2) % 4; i > 0; i--)
+				bitmap++;
+		}
+		break;
+	case 8:
+		for (y = height - 1; y >= 0; y--) {
+			fb_t = (unsigned int *) ((unsigned int)info->screen_base + (((y+yoffset) * info->var.xres) + xoffset)*cpp);
+			for (x = 0; x < width; x++) {
+				*fb_t++ = palette[ *bitmap++ ];
+			}
+			for (i = (width / 2) % 4; i > 0; i--)
+				bitmap++;
+		}
+		break;
+	case 24:
+		for (y = height - 1; y >= 0; y--) {
+			fb_t = (unsigned int *) ((unsigned int)info->screen_base + (((y+yoffset) * info->var.xres) + xoffset)*cpp);
+			for (x = 0; x < width; x++) {
+				b = *bitmap++;
+				g = *bitmap++;
+				r = *bitmap++;
+				val = (r << 16) + (g << 8) + b;
+				*fb_t++ = val;
+			}
+			for (; (x % 4) != 0; x++)	/* 4-byte alignment */
+				bitmap++;
+		}
+		break;
+	}
+
+	return height;
+}
+
+void fsl_diu_clear_screen(void)
+{
+	struct fb_info *info = &fsl_fb_info;
+
+	memset(info->screen_base, 0, info->smem_len);
+}
+#endif /* CONFIG_FSL_DIU_FB */
diff --git a/board/freescale/common/fsl_diu_fb.h b/board/freescale/common/fsl_diu_fb.h
new file mode 100644
index 0000000..9ddd4c0
--- /dev/null
+++ b/board/freescale/common/fsl_diu_fb.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2007 Freescale Semiconductor, Inc.
+ * York Sun <yorksun@freescale.com>
+ *
+ * FSL DIU Framebuffer driver
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+extern int fsl_diu_init(int xres,
+			unsigned int pixel_format,
+			int gamma_fix,
+			unsigned char *splash_bmp);
+extern void fsl_diu_clear_screen(void);
+extern int fsl_diu_display_bmp(unsigned char *bmp,
+			       int xoffset,
+			       int yoffset,
+			       int transpar);