drivers/video/bus_vcxk.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2005-2009
  * Jens Scharsig @ BuS Elektronik GmbH & Co. KG, <esw@bus-elektronik.de>
  *
  * 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 <bmp_layout.h>
 #include <asm/io.h>

 vu_char  *vcxk_bws      = ((vu_char *) (CONFIG_SYS_VCXK_BASE));
 vu_short *vcxk_bws_word = ((vu_short *)(CONFIG_SYS_VCXK_BASE));
 vu_long  *vcxk_bws_long = ((vu_long *) (CONFIG_SYS_VCXK_BASE));

 #ifdef CONFIG_AT91RM9200
 	#include <asm/arch/hardware.h>
 	#include <asm/arch/at91_pio.h>

 	#ifndef VCBITMASK
 		#define VCBITMASK(bitno)	(0x0001 << (bitno % 16))
 	#endif
 #ifndef CONFIG_AT91_LEGACY
 at91_pio_t *pio = (at91_pio_t *) AT91_PIO_BASE;
 #define VCXK_INIT_PIN(PORT, PIN, DDR, I0O1) \
 	do { \
 		writel(PIN, &pio->PORT.per); \
 		writel(PIN, &pio->PORT.DDR); \
 		writel(PIN, &pio->PORT.mddr); \
 		if (!I0O1) \
 			writel(PIN, &pio->PORT.puer); \
 	} while (0);

 #define VCXK_SET_PIN(PORT, PIN)	writel(PIN, &pio->PORT.sodr);
 #define VCXK_CLR_PIN(PORT, PIN)	writel(PIN, &pio->PORT.codr);

 #define VCXK_ACKNOWLEDGE	\
 	(!(readl(&pio->CONFIG_SYS_VCXK_ACKNOWLEDGE_PORT.pdsr) & \
 			CONFIG_SYS_VCXK_ACKNOWLEDGE_PIN))
 #else
 	#define VCXK_INIT_PIN(PORT, PIN, DDR, I0O1) \
 		((AT91PS_PIO) PORT)->PIO_PER = PIN; \
 		((AT91PS_PIO) PORT)->DDR = PIN; \
 		((AT91PS_PIO) PORT)->PIO_MDDR = PIN; \
 		if (!I0O1) ((AT91PS_PIO) PORT)->PIO_PPUER = PIN;

 	#define VCXK_SET_PIN(PORT, PIN)	((AT91PS_PIO) PORT)->PIO_SODR  = PIN;
 	#define VCXK_CLR_PIN(PORT, PIN)	((AT91PS_PIO) PORT)->PIO_CODR  = PIN;

 	#define VCXK_ACKNOWLEDGE	\
 		(!(((AT91PS_PIO) CONFIG_SYS_VCXK_ACKNOWLEDGE_PORT)->\
 			PIO_PDSR & CONFIG_SYS_VCXK_ACKNOWLEDGE_PIN))
 #endif
 #elif defined(CONFIG_MCF52x2)
 	#include <asm/m5282.h>
 	#ifndef VCBITMASK
 		#define VCBITMASK(bitno) (0x8000 >> (bitno % 16))
 	#endif

 	#define VCXK_INIT_PIN(PORT, PIN, DDR, I0O1) \
 		if (I0O1) DDR |= PIN; else DDR &= ~PIN;

 	#define VCXK_SET_PIN(PORT, PIN)	PORT |= PIN;
 	#define VCXK_CLR_PIN(PORT, PIN)	PORT &= ~PIN;

 	#define VCXK_ACKNOWLEDGE \
 		(!(CONFIG_SYS_VCXK_ACKNOWLEDGE_PORT &	\
 			CONFIG_SYS_VCXK_ACKNOWLEDGE_PIN))

 #else
 	#error no vcxk support for selected ARCH
 #endif

 #define VCXK_DISABLE\
 	VCXK_SET_PIN(CONFIG_SYS_VCXK_ENABLE_PORT, CONFIG_SYS_VCXK_ENABLE_PIN)
 #define VCXK_ENABLE\
 	VCXK_CLR_PIN(CONFIG_SYS_VCXK_ENABLE_PORT, CONFIG_SYS_VCXK_ENABLE_PIN)

 #ifndef CONFIG_SYS_VCXK_DOUBLEBUFFERED
 	#define VCXK_BWS(x, data)		vcxk_bws[x] = data;
 	#define VCXK_BWS_WORD_SET(x, mask) 	vcxk_bws_word[x] |= mask;
 	#define VCXK_BWS_WORD_CLEAR(x, mask) 	vcxk_bws_word[x] &= ~mask;
 	#define VCXK_BWS_LONG(x, data)		vcxk_bws_long[x] = data;
 #else
 	u_char double_bws[16384];
 	u_short *double_bws_word;
 	u_long  *double_bws_long;
 	#define VCXK_BWS(x,data)	\
 		double_bws[x] = data; vcxk_bws[x] = data;
 	#define VCXK_BWS_WORD_SET(x,mask)	\
 		double_bws_word[x] |= mask;	\
 		vcxk_bws_word[x] = double_bws_word[x];
 	#define VCXK_BWS_WORD_CLEAR(x,mask)	\
 		double_bws_word[x] &= ~mask;	\
 		vcxk_bws_word[x] = double_bws_word[x];
 	#define VCXK_BWS_LONG(x,data) \
 		double_bws_long[x] = data; vcxk_bws_long[x] = data;
 #endif

 #define VC4K16_Bright1	vcxk_bws_word[0x20004 / 2]
 #define VC4K16_Bright2 	vcxk_bws_word[0x20006 / 2]
 #define VC2K_Bright	vcxk_bws[0x8000]
 #define VC8K_BrightH	vcxk_bws[0xC000]
 #define VC8K_BrightL	vcxk_bws[0xC001]

 vu_char VC4K16;

 u_long display_width;
 u_long display_height;
 u_long display_bwidth;

 ulong search_vcxk_driver(void);
 void vcxk_cls(void);
 void vcxk_setbrightness(unsigned int side, short brightness);
 int vcxk_request(void);
 int vcxk_acknowledge_wait(void);
 void vcxk_clear(void);

 /*
  ****f* bus_vcxk/vcxk_init
  * FUNCTION
  * initialalize Video Controller
  * PARAMETERS
  * width	visible display width in pixel
  * height	visible display height  in pixel
  ***
  */

 int vcxk_init(unsigned long width, unsigned long height)
 {
 #ifdef CONFIG_SYS_VCXK_RESET_PORT
 	VCXK_INIT_PIN(CONFIG_SYS_VCXK_RESET_PORT,
 		CONFIG_SYS_VCXK_RESET_PIN, CONFIG_SYS_VCXK_RESET_DDR, 1)
 	VCXK_SET_PIN(CONFIG_SYS_VCXK_RESET_PORT, CONFIG_SYS_VCXK_RESET_PIN);
 #endif

 #ifdef CONFIG_SYS_VCXK_DOUBLEBUFFERED
 	double_bws_word  = (u_short *)double_bws;
 	double_bws_long  = (u_long *)double_bws;
 	debug("%lx %lx %lx \n", double_bws, double_bws_word, double_bws_long);
 #endif
 	display_width  = width;
 	display_height = height;
 #if (CONFIG_SYS_VCXK_DEFAULT_LINEALIGN == 4)
 	display_bwidth = ((width + 31) / 8) & ~0x3;
 #elif (CONFIG_SYS_VCXK_DEFAULT_LINEALIGN == 2)
 	display_bwidth = ((width + 15) / 8) & ~0x1;
 #else
 	#error CONFIG_SYS_VCXK_DEFAULT_LINEALIGN is invalid
 #endif
 	debug("linesize ((%ld + 15) / 8 & ~0x1) = %ld\n",
 		display_width, display_bwidth);

 #ifdef CONFIG_SYS_VCXK_AUTODETECT
 	VC4K16 = 0;
 	vcxk_bws_long[1] = 0x0;
 	vcxk_bws_long[1] = 0x55AAAA55;
 	vcxk_bws_long[5] = 0x0;
 	if (vcxk_bws_long[1] == 0x55AAAA55)
 		VC4K16 = 1;
 #else
 	VC4K16 = 1;
 	debug("No autodetect: use vc4k\n");
 #endif

 	VCXK_INIT_PIN(CONFIG_SYS_VCXK_INVERT_PORT,
 		CONFIG_SYS_VCXK_INVERT_PIN, CONFIG_SYS_VCXK_INVERT_DDR, 1)
 	VCXK_SET_PIN(CONFIG_SYS_VCXK_INVERT_PORT, CONFIG_SYS_VCXK_INVERT_PIN)

 	VCXK_SET_PIN(CONFIG_SYS_VCXK_REQUEST_PORT, CONFIG_SYS_VCXK_REQUEST_PIN);
 	VCXK_INIT_PIN(CONFIG_SYS_VCXK_REQUEST_PORT,
 		CONFIG_SYS_VCXK_REQUEST_PIN, CONFIG_SYS_VCXK_REQUEST_DDR, 1)

 	VCXK_INIT_PIN(CONFIG_SYS_VCXK_ACKNOWLEDGE_PORT,
 		CONFIG_SYS_VCXK_ACKNOWLEDGE_PIN,
 		CONFIG_SYS_VCXK_ACKNOWLEDGE_DDR, 0)

 	VCXK_DISABLE;
 	VCXK_INIT_PIN(CONFIG_SYS_VCXK_ENABLE_PORT,
 		CONFIG_SYS_VCXK_ENABLE_PIN, CONFIG_SYS_VCXK_ENABLE_DDR, 1)

 	vcxk_cls();
 	vcxk_cls();	/* clear second/hidden page */

 	vcxk_setbrightness(3, 1000);
 	VCXK_ENABLE;
 	return 1;
 }

 /*
  ****f* bus_vcxk/vcxk_setpixel
  * FUNCTION
  * set the pixel[x,y] with the given color
  * PARAMETER
  * x		pixel colum
  * y		pixel row
  * color	<0x40 off/black
  *			>0x40 on
  ***
  */

 void vcxk_setpixel(int x, int y, unsigned long color)
 {
 	vu_short dataptr;

 	if ((x < display_width) && (y < display_height)) {
 		dataptr = ((x / 16)) + (y * (display_bwidth >> 1));

 		color = ((color >> 16) & 0xFF) |
 			    ((color >> 8) & 0xFF) | (color & 0xFF);

 		if (color > 0x40) {
 			VCXK_BWS_WORD_SET(dataptr, VCBITMASK(x));
 		} else {
 			VCXK_BWS_WORD_CLEAR(dataptr, VCBITMASK(x));
 		}
 	}
 }

 /*
  ****f* bus_vcxk/vcxk_loadimage
  * FUNCTION
  * copies a binary image to display memory
  ***
  */

 void vcxk_loadimage(ulong source)
 {
 	int cnt;
 	vcxk_acknowledge_wait();
 	if (VC4K16) {
 		for (cnt = 0; cnt < (16384 / 4); cnt++) {
 			VCXK_BWS_LONG(cnt, (*(ulong *) source));
 			source = source + 4;
 		}
 	} else {
 		for (cnt = 0; cnt < 16384; cnt++) {
 			VCXK_BWS_LONG(cnt*2, (*(vu_char *) source));
 			source++;
 		}
 	}
 	vcxk_request();
 }

 /*
  ****f* bus_vcxk/vcxk_cls
  * FUNCTION
  * clear the display
  ***
  */

 void vcxk_cls(void)
 {
 	vcxk_acknowledge_wait();
 	vcxk_clear();
 	vcxk_request();
 }

 /*
  ****f* bus_vcxk/vcxk_clear(void)
  * FUNCTION
  * clear the display memory
  ***
  */

 void vcxk_clear(void)
 {
 	int cnt;

 	for (cnt = 0; cnt < (16384 / 4); cnt++) {
 		VCXK_BWS_LONG(cnt, 0)
 	}
 }

 /*
  ****f* bus_vcxk/vcxk_setbrightness
  * FUNCTION
  * set the display brightness
  * PARAMETER
  * side	1	set front side brightness
  * 		2	set back  side brightness
  *		3	set brightness for both sides
  * brightness 0..1000
  ***
  */

 void vcxk_setbrightness(unsigned int side, short brightness)
 {
 	if (VC4K16) {
 		if ((side == 0) || (side & 0x1))
 			VC4K16_Bright1 = brightness + 23;
 		if ((side == 0) || (side & 0x2))
 			VC4K16_Bright2 = brightness + 23;
 	} else 	{
 		VC2K_Bright = (brightness >> 4) + 2;
 		VC8K_BrightH = (brightness + 23) >> 8;
 		VC8K_BrightL = (brightness + 23) & 0xFF;
 	}
 }

 /*
  ****f* bus_vcxk/vcxk_request
  * FUNCTION
  * requests viewing of display memory
  ***
  */

 int vcxk_request(void)
 {
 	VCXK_CLR_PIN(CONFIG_SYS_VCXK_REQUEST_PORT,
 		CONFIG_SYS_VCXK_REQUEST_PIN)
 	VCXK_SET_PIN(CONFIG_SYS_VCXK_REQUEST_PORT,
 		CONFIG_SYS_VCXK_REQUEST_PIN);
 	return 1;
 }

 /*
  ****f* bus_vcxk/vcxk_acknowledge_wait
  * FUNCTION
  * wait for acknowledge viewing requests
  ***
  */

 int vcxk_acknowledge_wait(void)
 {
 	while (VCXK_ACKNOWLEDGE)
 		;
 	return 1;
 }

 /*
  ****f* bus_vcxk/vcxk_draw_mono
  * FUNCTION
  * copies a monochrom bitmap (BMP-Format) from given memory
  * PARAMETER
  * dataptr	pointer to bitmap
  * x		output bitmap @ columne
  * y		output bitmap @ row
  ***
  */

 void vcxk_draw_mono(unsigned char *dataptr, unsigned long linewidth,
 	unsigned long  cp_width, unsigned long cp_height)
 {
 	unsigned char *lineptr;
 	unsigned long xcnt, ycnt;

 	for (ycnt = cp_height; ycnt > 0; ycnt--) {
 		lineptr	= dataptr;
 		for (xcnt = 0; xcnt < cp_width; xcnt++) {
 			if ((*lineptr << (xcnt % 8)) & 0x80)
 				vcxk_setpixel(xcnt, ycnt - 1, 0xFFFFFF);
 			else
 				vcxk_setpixel(xcnt, ycnt-1, 0);

 			if ((xcnt % 8) == 7)
 				lineptr++;
 		} /* endfor xcnt */
 		dataptr = dataptr + linewidth;
 	} /* endfor ycnt */
 }

 /*
  ****f* bus_vcxk/vcxk_display_bitmap
  * FUNCTION
  * copies a bitmap (BMP-Format) to the given position
  * PARAMETER
  * addr		pointer to bitmap
  * x		output bitmap @ columne
  * y		output bitmap @ row
  ***
  */

 int vcxk_display_bitmap(ulong addr, int x, int y)
 {
 	bmp_image_t *bmp;
 	unsigned long width;
 	unsigned long height;
 	unsigned long bpp;
 	unsigned long compression;

 	unsigned long lw;

 	unsigned long c_width;
 	unsigned long c_height;
 	unsigned char *dataptr;

 	bmp = (bmp_image_t *) addr;
 	if ((bmp->header.signature[0] == 'B') &&
 	    (bmp->header.signature[1] == 'M')) {
 		compression  = le32_to_cpu(bmp->header.compression);
 		width        = le32_to_cpu(bmp->header.width);
 		height       = le32_to_cpu(bmp->header.height);
 		bpp          = le16_to_cpu(bmp->header.bit_count);

 		dataptr = (unsigned char *) bmp +
 				le32_to_cpu(bmp->header.data_offset);

 		if (display_width < (width + x))
 			c_width = display_width - x;
 		else
 			c_width = width;
 		if (display_height < (height + y))
 			c_height = display_height - y;
 		else
 			c_height = height;

 		lw = (((width + 7) / 8) + 3) & ~0x3;

 		if (c_height < height)
 			dataptr = dataptr + lw * (height - c_height);
 		switch (bpp) {
 		case 1:
 			vcxk_draw_mono(dataptr, lw, c_width, c_height);
 			break;
 		default:
 			printf("Error: %ld bit per pixel "
 				"not supported by VCxK\n", bpp);
 			return 0;
 		}
 	} else	{
 		printf("Error: no valid bmp at %lx\n", (ulong) bmp);
 		return 0;
 	}
 	return 1;
 }

 /*
  ****f* bus_vcxk/video_display_bitmap
  ***
  */

 int video_display_bitmap(ulong addr, int x, int y)
 {
 	vcxk_acknowledge_wait();
 	if (vcxk_display_bitmap(addr, x, y)) {
 		vcxk_request();
 		return 0;
 	}
 	return 1;
 }

 /* EOF */
	/*
	* (C) Copyright 2005-2009
	* Jens Scharsig @ BuS Elektronik GmbH & Co. KG, <esw@bus-elektronik.de>
	*
	* 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 <bmp_layout.h>
	#include <asm/io.h>

	vu_char vcxk_bws = ((vu_char ) (CONFIG_SYS_VCXK_BASE));
	vu_short vcxk_bws_word = ((vu_short )(CONFIG_SYS_VCXK_BASE));
	vu_long vcxk_bws_long = ((vu_long ) (CONFIG_SYS_VCXK_BASE));

	#ifdef CONFIG_AT91RM9200
	#include <asm/arch/hardware.h>
	#include <asm/arch/at91_pio.h>

	#ifndef VCBITMASK
	#define VCBITMASK(bitno) (0x0001 << (bitno % 16))
	#endif
	#ifndef CONFIG_AT91_LEGACY
	at91_pio_t pio = (at91_pio_t ) AT91_PIO_BASE;
	#define VCXK_INIT_PIN(PORT, PIN, DDR, I0O1) \
	do { \
	writel(PIN, &pio->PORT.per); \
	writel(PIN, &pio->PORT.DDR); \
	writel(PIN, &pio->PORT.mddr); \
	if (!I0O1) \
	writel(PIN, &pio->PORT.puer); \
	} while (0);

	#define VCXK_SET_PIN(PORT, PIN) writel(PIN, &pio->PORT.sodr);
	#define VCXK_CLR_PIN(PORT, PIN) writel(PIN, &pio->PORT.codr);

	#define VCXK_ACKNOWLEDGE \
	(!(readl(&pio->CONFIG_SYS_VCXK_ACKNOWLEDGE_PORT.pdsr) & \
	CONFIG_SYS_VCXK_ACKNOWLEDGE_PIN))
	#else
	#define VCXK_INIT_PIN(PORT, PIN, DDR, I0O1) \
	((AT91PS_PIO) PORT)->PIO_PER = PIN; \
	((AT91PS_PIO) PORT)->DDR = PIN; \
	((AT91PS_PIO) PORT)->PIO_MDDR = PIN; \
	if (!I0O1) ((AT91PS_PIO) PORT)->PIO_PPUER = PIN;

	#define VCXK_SET_PIN(PORT, PIN) ((AT91PS_PIO) PORT)->PIO_SODR = PIN;
	#define VCXK_CLR_PIN(PORT, PIN) ((AT91PS_PIO) PORT)->PIO_CODR = PIN;

	#define VCXK_ACKNOWLEDGE \
	(!(((AT91PS_PIO) CONFIG_SYS_VCXK_ACKNOWLEDGE_PORT)->\
	PIO_PDSR & CONFIG_SYS_VCXK_ACKNOWLEDGE_PIN))
	#endif
	#elif defined(CONFIG_MCF52x2)
	#include <asm/m5282.h>
	#ifndef VCBITMASK
	#define VCBITMASK(bitno) (0x8000 >> (bitno % 16))
	#endif

	#define VCXK_INIT_PIN(PORT, PIN, DDR, I0O1) \
	if (I0O1) DDR \|= PIN; else DDR &= ~PIN;

	#define VCXK_SET_PIN(PORT, PIN) PORT \|= PIN;
	#define VCXK_CLR_PIN(PORT, PIN) PORT &= ~PIN;

	#define VCXK_ACKNOWLEDGE \
	(!(CONFIG_SYS_VCXK_ACKNOWLEDGE_PORT & \
	CONFIG_SYS_VCXK_ACKNOWLEDGE_PIN))

	#else
	#error no vcxk support for selected ARCH
	#endif

	#define VCXK_DISABLE\
	VCXK_SET_PIN(CONFIG_SYS_VCXK_ENABLE_PORT, CONFIG_SYS_VCXK_ENABLE_PIN)
	#define VCXK_ENABLE\
	VCXK_CLR_PIN(CONFIG_SYS_VCXK_ENABLE_PORT, CONFIG_SYS_VCXK_ENABLE_PIN)

	#ifndef CONFIG_SYS_VCXK_DOUBLEBUFFERED
	#define VCXK_BWS(x, data) vcxk_bws[x] = data;
	#define VCXK_BWS_WORD_SET(x, mask) vcxk_bws_word[x] \|= mask;
	#define VCXK_BWS_WORD_CLEAR(x, mask) vcxk_bws_word[x] &= ~mask;
	#define VCXK_BWS_LONG(x, data) vcxk_bws_long[x] = data;
	#else
	u_char double_bws[16384];
	u_short *double_bws_word;
	u_long *double_bws_long;
	#define VCXK_BWS(x,data) \
	double_bws[x] = data; vcxk_bws[x] = data;
	#define VCXK_BWS_WORD_SET(x,mask) \
	double_bws_word[x] \|= mask; \
	vcxk_bws_word[x] = double_bws_word[x];
	#define VCXK_BWS_WORD_CLEAR(x,mask) \
	double_bws_word[x] &= ~mask; \
	vcxk_bws_word[x] = double_bws_word[x];
	#define VCXK_BWS_LONG(x,data) \
	double_bws_long[x] = data; vcxk_bws_long[x] = data;
	#endif

	#define VC4K16_Bright1 vcxk_bws_word[0x20004 / 2]
	#define VC4K16_Bright2 vcxk_bws_word[0x20006 / 2]
	#define VC2K_Bright vcxk_bws[0x8000]
	#define VC8K_BrightH vcxk_bws[0xC000]
	#define VC8K_BrightL vcxk_bws[0xC001]

	vu_char VC4K16;

	u_long display_width;
	u_long display_height;
	u_long display_bwidth;

	ulong search_vcxk_driver(void);
	void vcxk_cls(void);
	void vcxk_setbrightness(unsigned int side, short brightness);
	int vcxk_request(void);
	int vcxk_acknowledge_wait(void);
	void vcxk_clear(void);

	/*
	***f bus_vcxk/vcxk_init
	* FUNCTION
	* initialalize Video Controller
	* PARAMETERS
	* width visible display width in pixel
	* height visible display height in pixel
	***
	*/

	int vcxk_init(unsigned long width, unsigned long height)
	{
	#ifdef CONFIG_SYS_VCXK_RESET_PORT
	VCXK_INIT_PIN(CONFIG_SYS_VCXK_RESET_PORT,
	CONFIG_SYS_VCXK_RESET_PIN, CONFIG_SYS_VCXK_RESET_DDR, 1)
	VCXK_SET_PIN(CONFIG_SYS_VCXK_RESET_PORT, CONFIG_SYS_VCXK_RESET_PIN);
	#endif

	#ifdef CONFIG_SYS_VCXK_DOUBLEBUFFERED
	double_bws_word = (u_short *)double_bws;
	double_bws_long = (u_long *)double_bws;
	debug("%lx %lx %lx \n", double_bws, double_bws_word, double_bws_long);
	#endif
	display_width = width;
	display_height = height;
	#if (CONFIG_SYS_VCXK_DEFAULT_LINEALIGN == 4)
	display_bwidth = ((width + 31) / 8) & ~0x3;
	#elif (CONFIG_SYS_VCXK_DEFAULT_LINEALIGN == 2)
	display_bwidth = ((width + 15) / 8) & ~0x1;
	#else
	#error CONFIG_SYS_VCXK_DEFAULT_LINEALIGN is invalid
	#endif
	debug("linesize ((%ld + 15) / 8 & ~0x1) = %ld\n",
	display_width, display_bwidth);

	#ifdef CONFIG_SYS_VCXK_AUTODETECT
	VC4K16 = 0;
	vcxk_bws_long[1] = 0x0;
	vcxk_bws_long[1] = 0x55AAAA55;
	vcxk_bws_long[5] = 0x0;
	if (vcxk_bws_long[1] == 0x55AAAA55)
	VC4K16 = 1;
	#else
	VC4K16 = 1;
	debug("No autodetect: use vc4k\n");
	#endif

	VCXK_INIT_PIN(CONFIG_SYS_VCXK_INVERT_PORT,
	CONFIG_SYS_VCXK_INVERT_PIN, CONFIG_SYS_VCXK_INVERT_DDR, 1)
	VCXK_SET_PIN(CONFIG_SYS_VCXK_INVERT_PORT, CONFIG_SYS_VCXK_INVERT_PIN)

	VCXK_SET_PIN(CONFIG_SYS_VCXK_REQUEST_PORT, CONFIG_SYS_VCXK_REQUEST_PIN);
	VCXK_INIT_PIN(CONFIG_SYS_VCXK_REQUEST_PORT,
	CONFIG_SYS_VCXK_REQUEST_PIN, CONFIG_SYS_VCXK_REQUEST_DDR, 1)

	VCXK_INIT_PIN(CONFIG_SYS_VCXK_ACKNOWLEDGE_PORT,
	CONFIG_SYS_VCXK_ACKNOWLEDGE_PIN,
	CONFIG_SYS_VCXK_ACKNOWLEDGE_DDR, 0)

	VCXK_DISABLE;
	VCXK_INIT_PIN(CONFIG_SYS_VCXK_ENABLE_PORT,
	CONFIG_SYS_VCXK_ENABLE_PIN, CONFIG_SYS_VCXK_ENABLE_DDR, 1)

	vcxk_cls();
	vcxk_cls(); /* clear second/hidden page */

	vcxk_setbrightness(3, 1000);
	VCXK_ENABLE;
	return 1;
	}

	/*
	***f bus_vcxk/vcxk_setpixel
	* FUNCTION
	* set the pixel[x,y] with the given color
	* PARAMETER
	* x pixel colum
	* y pixel row
	* color <0x40 off/black
	* >0x40 on
	***
	*/

	void vcxk_setpixel(int x, int y, unsigned long color)
	{
	vu_short dataptr;

	if ((x < display_width) && (y < display_height)) {
	dataptr = ((x / 16)) + (y * (display_bwidth >> 1));

	color = ((color >> 16) & 0xFF) \|
	((color >> 8) & 0xFF) \| (color & 0xFF);

	if (color > 0x40) {
	VCXK_BWS_WORD_SET(dataptr, VCBITMASK(x));
	} else {
	VCXK_BWS_WORD_CLEAR(dataptr, VCBITMASK(x));
	}
	}
	}

	/*
	***f bus_vcxk/vcxk_loadimage
	* FUNCTION
	* copies a binary image to display memory
	***
	*/

	void vcxk_loadimage(ulong source)
	{
	int cnt;
	vcxk_acknowledge_wait();
	if (VC4K16) {
	for (cnt = 0; cnt < (16384 / 4); cnt++) {
	VCXK_BWS_LONG(cnt, ((ulong ) source));
	source = source + 4;
	}
	} else {
	for (cnt = 0; cnt < 16384; cnt++) {
	VCXK_BWS_LONG(cnt2, ((vu_char *) source));
	source++;
	}
	}
	vcxk_request();
	}

	/*
	***f bus_vcxk/vcxk_cls
	* FUNCTION
	* clear the display
	***
	*/

	void vcxk_cls(void)
	{
	vcxk_acknowledge_wait();
	vcxk_clear();
	vcxk_request();
	}

	/*
	***f bus_vcxk/vcxk_clear(void)
	* FUNCTION
	* clear the display memory
	***
	*/

	void vcxk_clear(void)
	{
	int cnt;

	for (cnt = 0; cnt < (16384 / 4); cnt++) {
	VCXK_BWS_LONG(cnt, 0)
	}
	}

	/*
	***f bus_vcxk/vcxk_setbrightness
	* FUNCTION
	* set the display brightness
	* PARAMETER
	* side 1 set front side brightness
	* 2 set back side brightness
	* 3 set brightness for both sides
	* brightness 0..1000
	***
	*/

	void vcxk_setbrightness(unsigned int side, short brightness)
	{
	if (VC4K16) {
	if ((side == 0) \|\| (side & 0x1))
	VC4K16_Bright1 = brightness + 23;
	if ((side == 0) \|\| (side & 0x2))
	VC4K16_Bright2 = brightness + 23;
	} else {
	VC2K_Bright = (brightness >> 4) + 2;
	VC8K_BrightH = (brightness + 23) >> 8;
	VC8K_BrightL = (brightness + 23) & 0xFF;
	}
	}

	/*
	***f bus_vcxk/vcxk_request
	* FUNCTION
	* requests viewing of display memory
	***
	*/

	int vcxk_request(void)
	{
	VCXK_CLR_PIN(CONFIG_SYS_VCXK_REQUEST_PORT,
	CONFIG_SYS_VCXK_REQUEST_PIN)
	VCXK_SET_PIN(CONFIG_SYS_VCXK_REQUEST_PORT,
	CONFIG_SYS_VCXK_REQUEST_PIN);
	return 1;
	}

	/*
	***f bus_vcxk/vcxk_acknowledge_wait
	* FUNCTION
	* wait for acknowledge viewing requests
	***
	*/

	int vcxk_acknowledge_wait(void)
	{
	while (VCXK_ACKNOWLEDGE)
	;
	return 1;
	}

	/*
	***f bus_vcxk/vcxk_draw_mono
	* FUNCTION
	* copies a monochrom bitmap (BMP-Format) from given memory
	* PARAMETER
	* dataptr pointer to bitmap
	* x output bitmap @ columne
	* y output bitmap @ row
	***
	*/

	void vcxk_draw_mono(unsigned char *dataptr, unsigned long linewidth,
	unsigned long cp_width, unsigned long cp_height)
	{
	unsigned char *lineptr;
	unsigned long xcnt, ycnt;

	for (ycnt = cp_height; ycnt > 0; ycnt--) {
	lineptr = dataptr;
	for (xcnt = 0; xcnt < cp_width; xcnt++) {
	if ((*lineptr << (xcnt % 8)) & 0x80)
	vcxk_setpixel(xcnt, ycnt - 1, 0xFFFFFF);
	else
	vcxk_setpixel(xcnt, ycnt-1, 0);

	if ((xcnt % 8) == 7)
	lineptr++;
	} /* endfor xcnt */
	dataptr = dataptr + linewidth;
	} /* endfor ycnt */
	}

	/*
	***f bus_vcxk/vcxk_display_bitmap
	* FUNCTION
	* copies a bitmap (BMP-Format) to the given position
	* PARAMETER
	* addr pointer to bitmap
	* x output bitmap @ columne
	* y output bitmap @ row
	***
	*/

	int vcxk_display_bitmap(ulong addr, int x, int y)
	{
	bmp_image_t *bmp;
	unsigned long width;
	unsigned long height;
	unsigned long bpp;
	unsigned long compression;

	unsigned long lw;

	unsigned long c_width;
	unsigned long c_height;
	unsigned char *dataptr;

	bmp = (bmp_image_t *) addr;
	if ((bmp->header.signature[0] == 'B') &&
	(bmp->header.signature[1] == 'M')) {
	compression = le32_to_cpu(bmp->header.compression);
	width = le32_to_cpu(bmp->header.width);
	height = le32_to_cpu(bmp->header.height);
	bpp = le16_to_cpu(bmp->header.bit_count);

	dataptr = (unsigned char *) bmp +
	le32_to_cpu(bmp->header.data_offset);

	if (display_width < (width + x))
	c_width = display_width - x;
	else
	c_width = width;
	if (display_height < (height + y))
	c_height = display_height - y;
	else
	c_height = height;

	lw = (((width + 7) / 8) + 3) & ~0x3;

	if (c_height < height)
	dataptr = dataptr + lw * (height - c_height);
	switch (bpp) {
	case 1:
	vcxk_draw_mono(dataptr, lw, c_width, c_height);
	break;
	default:
	printf("Error: %ld bit per pixel "
	"not supported by VCxK\n", bpp);
	return 0;
	}
	} else {
	printf("Error: no valid bmp at %lx\n", (ulong) bmp);
	return 0;
	}
	return 1;
	}

	/*
	***f bus_vcxk/video_display_bitmap
	***
	*/

	int video_display_bitmap(ulong addr, int x, int y)
	{
	vcxk_acknowledge_wait();
	if (vcxk_display_bitmap(addr, x, y)) {
	vcxk_request();
	return 0;
	}
	return 1;
	}

	/* EOF */