new video driver for bus vcxk framebuffers

This patch adds a new video driver

* adds common bus_vcxk framebuffer driver

Signed-off-by: Jens Scharsig <esw@bus-elektronik.de>
[agust@denx.de: fixed lots of style issues before applying]
Signed-off-by: Anatolij Gustschin <agust@denx.de>

4 files changed, 558 insertions, 0 deletions

diff --git a/doc/README.bus_vcxk b/doc/README.bus_vcxk
new file mode 100644
index 0000000..4eb8fe8
--- /dev/null
+++ b/doc/README.bus_vcxk
@@ -0,0 +1,85 @@
+/*
+ * (C) Copyright 2008-2009
+ * BuS Elektronik GmbH & Co. KG <www.bus-elektronik.de>
+ * Jens Scharsig <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
+ */
+
+U-Boot vcxk video controller driver
+======================================
+
+By defining CONFIG_VIDEO_VCXK this driver can be used with VC2K, VC4K and
+VC8K devices on following boards:
+
+board           | ARCH          | Vendor
+-----------------------------------------------------------------------
+EB+CPU5282-T1   | MCF5282       | BuS Elektronik GmbH & Co. KG
+EB+MCF-EVB123   | MCF5282       | BuS Elektronik GmbH & Co. KG
+EB+CPUx9K2      | AT91RM9200    | BuS Elektronik GmbH & Co. KG
+ZLSA            | AT91RM9200    | Ruf Telematik AG
+
+Driver configuration
+--------------------
+
+The driver needs some defines to describe the target hardware:
+
+CONFIG_SYS_VCXK_BASE
+
+	base address of VCxK hardware memory
+
+CONFIG_SYS_VCXK_DEFAULT_LINEALIGN
+
+	defines the physical alignment of a pixel row
+
+CONFIG_SYS_VCXK_DOUBLEBUFFERED
+
+	some boards that use vcxk prevent read from framebuffer memory.
+	define this option to enable double buffering (needs 16KiB RAM)
+
+CONFIG_SYS_VCXK_<xxxx>_PIN
+
+	defines the number of the I/O line PIN in the port
+	valid values for <xxxx> are:
+
+		ACKNOWLEDGE
+			describes the acknowledge line from vcxk hardware
+
+		ENABLE
+			describes the enable line to vcxk hardware
+
+		INVERT
+			describes the invert line to vcxk hardware
+
+		RESET
+			describes the reset line to vcxk hardware
+
+		REQUEST
+			describes the request line to vcxk hardware
+
+CONFIG_SYS_VCXK_<xxxx>_PORT
+
+	defines the I/O port which is connected with the line
+	for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN
+
+CONFIG_SYS_VCXK_<xxxx>_DDR
+
+	defines the register which configures the direction
+	for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN
+
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index bc00852..bb6b5a0 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -36,6 +36,7 @@ COBJS-$(CONFIG_VIDEO_SED13806) += sed13806.o
 COBJS-$(CONFIG_SED156X) += sed156x.o
 COBJS-$(CONFIG_VIDEO_SM501) += sm501.o
 COBJS-$(CONFIG_VIDEO_SMI_LYNXEM) += smiLynxEM.o
+COBJS-$(CONFIG_VIDEO_VCXK) += bus_vcxk.o
 COBJS-y += videomodes.o
 
 COBJS	:= $(COBJS-y)
diff --git a/drivers/video/bus_vcxk.c b/drivers/video/bus_vcxk.c
new file mode 100644
index 0000000..b7875de
--- /dev/null
+++ b/drivers/video/bus_vcxk.c
@@ -0,0 +1,436 @@
+/*
+ * (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>
+	#ifndef VCBITMASK
+		#define VCBITMASK(bitno)	(0x0001 << (bitno % 16))
+	#endif
+	#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))
+
+#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 ((%d + 15) / 8 & ~0x1) = %d\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;
+	unsigned char *lineptr;
+
+	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 */
diff --git a/include/bus_vcxk.h b/include/bus_vcxk.h
new file mode 100644
index 0000000..88af53f
--- /dev/null
+++ b/include/bus_vcxk.h
@@ -0,0 +1,36 @@
+/*
+ * (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
+ */
+
+#ifndef __BUS_VCXK_H_
+#define __BUS_VCXK_H_
+
+extern int vcxk_init(unsigned long width, unsigned long height);
+extern void vcxk_setpixel(int x, int y, unsigned long color);
+extern int vcxk_acknowledge_wait(void);
+extern int vcxk_request(void);
+extern void vcxk_loadimage(ulong source);
+extern int vcxk_display_bitmap(ulong addr, int x, int y);
+extern void vcxk_setbrightness(unsigned int side, short brightness);
+extern int video_display_bitmap(ulong addr, int x, int y);
+
+#endif