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authorMike Frysinger <vapier@gentoo.org>2008-04-18 20:44:11 -0400
committerMike Frysinger <vapier@gentoo.org>2009-01-28 13:26:13 -0500
commitfee531eeefc3b5f2c63c7fe27b9f55d924c59c26 (patch)
treef51930bf1db60eb3c3d642afb1580d92621b13d2 /board/bf533-stamp/video.c
parenta750d038f2548d846ea1e046d873dc932d041319 (diff)
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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>
Diffstat (limited to 'board/bf533-stamp/video.c')
-rw-r--r--board/bf533-stamp/video.c167
1 files changed, 167 insertions, 0 deletions
diff --git a/board/bf533-stamp/video.c b/board/bf533-stamp/video.c
new file mode 100644
index 0000000..3c15eaa
--- /dev/null
+++ b/board/bf533-stamp/video.c
@@ -0,0 +1,167 @@
+/*
+ * 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);
+}