Blackfin: resurrect BF533-STAMP video splash driver

This video driver used to live in the Blackfin cpu directory, but it was
lost during the unification process.  This brings it back.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

board/bf533-stamp/Makefile

 #
 # U-boot - Makefile
 #
-# Copyright (c) 2005-2007 Analog Device Inc.
+# Copyright (c) 2005-2008 Analog Device Inc.
 #
 # (C) Copyright 2000-2006
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -29,10 +29,11 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= $(BOARD).o spi_flash.o
+COBJS-y               := $(BOARD).o spi_flash.o
+COBJS-$(CONFIG_VIDEO) += video.o
 
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
+SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS-y))
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS) $(SOBJS) $(obj)u-boot.lds

board/bf533-stamp/video.c

+/*
+ * BF533-STAMP splash driver
+ *
+ * Copyright (c) 2006-2008 Analog Devices Inc.
+ * (C) Copyright 2000
+ * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
+ * (C) Copyright 2002
+ * Wolfgang Denk, wd@denx.de
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <stdarg.h>
+#include <common.h>
+#include <config.h>
+#include <malloc.h>
+#include <asm/blackfin.h>
+#include <asm/mach-common/bits/dma.h>
+#include <i2c.h>
+#include <linux/types.h>
+#include <devices.h>
+
+int gunzip(void *, int, unsigned char *, unsigned long *);
+
+#define DMA_SIZE16	2
+
+#include <asm/mach-common/bits/ppi.h>
+
+#define NTSC_FRAME_ADDR 0x06000000
+#include "video.h"
+
+/* NTSC OUTPUT SIZE  720 * 240 */
+#define VERTICAL	2
+#define HORIZONTAL	4
+
+int is_vblank_line(const int line)
+{
+	/*
+	 *  This array contains a single bit for each line in
+	 *  an NTSC frame.
+	 */
+	if ((line <= 18) || (line >= 264 && line <= 281) || (line == 528))
+		return true;
+
+	return false;
+}
+
+int NTSC_framebuffer_init(char *base_address)
+{
+	const int NTSC_frames = 1;
+	const int NTSC_lines = 525;
+	char *dest = base_address;
+	int frame_num, line_num;
+
+	for (frame_num = 0; frame_num < NTSC_frames; ++frame_num) {
+		for (line_num = 1; line_num <= NTSC_lines; ++line_num) {
+			unsigned int code;
+			int offset = 0;
+			int i;
+
+			if (is_vblank_line(line_num))
+				offset++;
+
+			if (line_num > 266 || line_num < 3)
+				offset += 2;
+
+			/* Output EAV code */
+			code = system_code_map[offset].eav;
+			write_dest_byte((char)(code >> 24) & 0xff);
+			write_dest_byte((char)(code >> 16) & 0xff);
+			write_dest_byte((char)(code >> 8) & 0xff);
+			write_dest_byte((char)(code) & 0xff);
+
+			/* Output horizontal blanking */
+			for (i = 0; i < 67 * 2; ++i) {
+				write_dest_byte(0x80);
+				write_dest_byte(0x10);
+			}
+
+			/* Output SAV */
+			code = system_code_map[offset].sav;
+			write_dest_byte((char)(code >> 24) & 0xff);
+			write_dest_byte((char)(code >> 16) & 0xff);
+			write_dest_byte((char)(code >> 8) & 0xff);
+			write_dest_byte((char)(code) & 0xff);
+
+			/* Output empty horizontal data */
+			for (i = 0; i < 360 * 2; ++i) {
+				write_dest_byte(0x80);
+				write_dest_byte(0x10);
+			}
+		}
+	}
+
+	return dest - base_address;
+}
+
+void fill_frame(char *Frame, int Value)
+{
+	int *OddPtr32;
+	int OddLine;
+	int *EvenPtr32;
+	int EvenLine;
+	int i;
+	int *data;
+	int m, n;
+
+	/* fill odd and even frames */
+	for (OddLine = 22, EvenLine = 285; OddLine < 263; OddLine++, EvenLine++) {
+		OddPtr32 = (int *)((Frame + (OddLine * 1716)) + 276);
+		EvenPtr32 = (int *)((Frame + (EvenLine * 1716)) + 276);
+		for (i = 0; i < 360; i++, OddPtr32++, EvenPtr32++) {
+			*OddPtr32 = Value;
+			*EvenPtr32 = Value;
+		}
+	}
+
+	for (m = 0; m < VERTICAL; m++) {
+		data = (int *)u_boot_logo.data;
+		for (OddLine = (22 + m), EvenLine = (285 + m);
+		     OddLine < (u_boot_logo.height * VERTICAL) + (22 + m);
+		     OddLine += VERTICAL, EvenLine += VERTICAL) {
+			OddPtr32 = (int *)((Frame + ((OddLine) * 1716)) + 276);
+			EvenPtr32 =
+			    (int *)((Frame + ((EvenLine) * 1716)) + 276);
+			for (i = 0; i < u_boot_logo.width / 2; i++) {
+				/* enlarge one pixel to m x n */
+				for (n = 0; n < HORIZONTAL; n++) {
+					*OddPtr32++ = *data;
+					*EvenPtr32++ = *data;
+				}
+				data++;
+			}
+		}
+	}
+}
+
+static void video_init(char *NTSCFrame)
+{
+	NTSC_framebuffer_init(NTSCFrame);
+	fill_frame(NTSCFrame, BLUE);
+
+	bfin_write_PPI_CONTROL(0x0082);
+	bfin_write_PPI_FRAME(0x020D);
+
+	bfin_write_DMA0_START_ADDR(NTSCFrame);
+	bfin_write_DMA0_X_COUNT(0x035A);
+	bfin_write_DMA0_X_MODIFY(0x0002);
+	bfin_write_DMA0_Y_COUNT(0x020D);
+	bfin_write_DMA0_Y_MODIFY(0x0002);
+	bfin_write_DMA0_CONFIG(0x1015);
+	bfin_write_PPI_CONTROL(0x0083);
+}
+
+int drv_video_init(void)
+{
+	device_t videodev;
+
+	video_init((void *)NTSC_FRAME_ADDR);
+
+	memset(&videodev, 0, sizeof(videodev));
+	strcpy(videodev.name, "video");
+	videodev.ext = DEV_EXT_VIDEO;
+	videodev.flags = DEV_FLAGS_SYSTEM;
+
+	return device_register(&videodev);
+}

board/bf533-stamp/video.h

+#include <video_logo.h>
+#define write_dest_byte(val) {*dest++=val;}
+#define BLACK   (0x01800180)	/* black pixel pattern   */
+#define BLUE    (0x296E29F0)	/* blue pixel pattern    */
+#define RED     (0x51F0515A)	/* red pixel pattern     */
+#define MAGENTA (0x6ADE6ACA)	/* magenta pixel pattern */
+#define GREEN   (0x91229136)	/* green pixel pattern   */
+#define CYAN    (0xAA10AAA6)	/* cyan pixel pattern    */
+#define YELLOW  (0xD292D210)	/* yellow pixel pattern  */
+#define WHITE   (0xFE80FE80)	/* white pixel pattern   */
+
+#define true	1
+#define false	0
+
+typedef struct {
+	unsigned int sav;
+	unsigned int eav;
+} system_code_type;
+
+const system_code_type system_code_map[] = {
+	{ 0xFF000080, 0xFF00009D },
+	{ 0xFF0000AB, 0xFF0000B6 },
+	{ 0xFF0000C7, 0xFF0000DA },
+	{ 0xFF0000EC, 0xFF0000F1 },
+};