board/bf533-stamp/video.c

   1 /*
   2  * BF533-STAMP splash driver
   3  *
   4  * Copyright (c) 2006-2008 Analog Devices Inc.
   5  * (C) Copyright 2000
   6  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   7  * (C) Copyright 2002
   8  * Wolfgang Denk, wd@denx.de
   9  *
  10  * Licensed under the GPL-2 or later.
  11  */
  12
  13 #include <stdarg.h>
  14 #include <common.h>
  15 #include <config.h>
  16 #include <malloc.h>
  17 #include <asm/blackfin.h>
  18 #include <asm/mach-common/bits/dma.h>
  19 #include <i2c.h>
  20 #include <linux/types.h>
  21 #include <devices.h>
  22
  23 int gunzip(void *, int, unsigned char *, unsigned long *);
  24
  25 #define DMA_SIZE16      2
  26
  27 #include <asm/mach-common/bits/ppi.h>
  28
  29 #define NTSC_FRAME_ADDR 0x06000000
  30 #include "video.h"
  31
  32 /* NTSC OUTPUT SIZE  720 * 240 */
  33 #define VERTICAL        2
  34 #define HORIZONTAL      4
  35
  36 int is_vblank_line(const int line)
  37 {
  38         /*
  39          *  This array contains a single bit for each line in
  40          *  an NTSC frame.
  41          */
  42         if ((line <= 18) || (line >= 264 && line <= 281) || (line == 528))
  43                 return true;
  44
  45         return false;
  46 }
  47
  48 int NTSC_framebuffer_init(char *base_address)
  49 {
  50         const int NTSC_frames = 1;
  51         const int NTSC_lines = 525;
  52         char *dest = base_address;
  53         int frame_num, line_num;
  54
  55         for (frame_num = 0; frame_num < NTSC_frames; ++frame_num) {
  56                 for (line_num = 1; line_num <= NTSC_lines; ++line_num) {
  57                         unsigned int code;
  58                         int offset = 0;
  59                         int i;
  60
  61                         if (is_vblank_line(line_num))
  62                                 offset++;
  63
  64                         if (line_num > 266 || line_num < 3)
  65                                 offset += 2;
  66
  67                         /* Output EAV code */
  68                         code = system_code_map[offset].eav;
  69                         write_dest_byte((char)(code >> 24) & 0xff);
  70                         write_dest_byte((char)(code >> 16) & 0xff);
  71                         write_dest_byte((char)(code >> 8) & 0xff);
  72                         write_dest_byte((char)(code) & 0xff);
  73
  74                         /* Output horizontal blanking */
  75                         for (i = 0; i < 67 * 2; ++i) {
  76                                 write_dest_byte(0x80);
  77                                 write_dest_byte(0x10);
  78                         }
  79
  80                         /* Output SAV */
  81                         code = system_code_map[offset].sav;
  82                         write_dest_byte((char)(code >> 24) & 0xff);
  83                         write_dest_byte((char)(code >> 16) & 0xff);
  84                         write_dest_byte((char)(code >> 8) & 0xff);
  85                         write_dest_byte((char)(code) & 0xff);
  86
  87                         /* Output empty horizontal data */
  88                         for (i = 0; i < 360 * 2; ++i) {
  89                                 write_dest_byte(0x80);
  90                                 write_dest_byte(0x10);
  91                         }
  92                 }
  93         }
  94
  95         return dest - base_address;
  96 }
  97
  98 void fill_frame(char *Frame, int Value)
  99 {
 100         int *OddPtr32;
 101         int OddLine;
 102         int *EvenPtr32;
 103         int EvenLine;
 104         int i;
 105         int *data;
 106         int m, n;
 107
 108         /* fill odd and even frames */
 109         for (OddLine = 22, EvenLine = 285; OddLine < 263; OddLine++, EvenLine++) {
 110                 OddPtr32 = (int *)((Frame + (OddLine * 1716)) + 276);
 111                 EvenPtr32 = (int *)((Frame + (EvenLine * 1716)) + 276);
 112                 for (i = 0; i < 360; i++, OddPtr32++, EvenPtr32++) {
 113                         *OddPtr32 = Value;
 114                         *EvenPtr32 = Value;
 115                 }
 116         }
 117
 118         for (m = 0; m < VERTICAL; m++) {
 119                 data = (int *)u_boot_logo.data;
 120                 for (OddLine = (22 + m), EvenLine = (285 + m);
 121                      OddLine < (u_boot_logo.height * VERTICAL) + (22 + m);
 122                      OddLine += VERTICAL, EvenLine += VERTICAL) {
 123                         OddPtr32 = (int *)((Frame + ((OddLine) * 1716)) + 276);
 124                         EvenPtr32 =
 125                             (int *)((Frame + ((EvenLine) * 1716)) + 276);
 126                         for (i = 0; i < u_boot_logo.width / 2; i++) {
 127                                 /* enlarge one pixel to m x n */
 128                                 for (n = 0; n < HORIZONTAL; n++) {
 129                                         *OddPtr32++ = *data;
 130                                         *EvenPtr32++ = *data;
 131                                 }
 132                                 data++;
 133                         }
 134                 }
 135         }
 136 }
 137
 138 static void video_init(char *NTSCFrame)
 139 {
 140         NTSC_framebuffer_init(NTSCFrame);
 141         fill_frame(NTSCFrame, BLUE);
 142
 143         bfin_write_PPI_CONTROL(0x0082);
 144         bfin_write_PPI_FRAME(0x020D);
 145
 146         bfin_write_DMA0_START_ADDR(NTSCFrame);
 147         bfin_write_DMA0_X_COUNT(0x035A);
 148         bfin_write_DMA0_X_MODIFY(0x0002);
 149         bfin_write_DMA0_Y_COUNT(0x020D);
 150         bfin_write_DMA0_Y_MODIFY(0x0002);
 151         bfin_write_DMA0_CONFIG(0x1015);
 152         bfin_write_PPI_CONTROL(0x0083);
 153 }
 154
 155 int drv_video_init(void)
 156 {
 157         device_t videodev;
 158
 159         video_init((void *)NTSC_FRAME_ADDR);
 160
 161         memset(&videodev, 0, sizeof(videodev));
 162         strcpy(videodev.name, "video");
 163         videodev.ext = DEV_EXT_VIDEO;
 164         videodev.flags = DEV_FLAGS_SYSTEM;
 165
 166         return device_register(&videodev);
 167 }