LXR uboot/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 <stdio_dev.h>
  22
  23#define DMA_SIZE16      2
  24
  25#include <asm/mach-common/bits/ppi.h>
  26
  27#define NTSC_FRAME_ADDR 0x06000000
  28#include "video.h"
  29
  30/* NTSC OUTPUT SIZE  720 * 240 */
  31#define VERTICAL        2
  32#define HORIZONTAL      4
  33
  34int is_vblank_line(const int line)
  35{
  36        /*
  37         *  This array contains a single bit for each line in
  38         *  an NTSC frame.
  39         */
  40        if ((line <= 18) || (line >= 264 && line <= 281) || (line == 528))
  41                return true;
  42
  43        return false;
  44}
  45
  46int NTSC_framebuffer_init(char *base_address)
  47{
  48        const int NTSC_frames = 1;
  49        const int NTSC_lines = 525;
  50        char *dest = base_address;
  51        int frame_num, line_num;
  52
  53        for (frame_num = 0; frame_num < NTSC_frames; ++frame_num) {
  54                for (line_num = 1; line_num <= NTSC_lines; ++line_num) {
  55                        unsigned int code;
  56                        int offset = 0;
  57                        int i;
  58
  59                        if (is_vblank_line(line_num))
  60                                offset++;
  61
  62                        if (line_num > 266 || line_num < 3)
  63                                offset += 2;
  64
  65                        /* Output EAV code */
  66                        code = system_code_map[offset].eav;
  67                        write_dest_byte((char)(code >> 24) & 0xff);
  68                        write_dest_byte((char)(code >> 16) & 0xff);
  69                        write_dest_byte((char)(code >> 8) & 0xff);
  70                        write_dest_byte((char)(code) & 0xff);
  71
  72                        /* Output horizontal blanking */
  73                        for (i = 0; i < 67 * 2; ++i) {
  74                                write_dest_byte(0x80);
  75                                write_dest_byte(0x10);
  76                        }
  77
  78                        /* Output SAV */
  79                        code = system_code_map[offset].sav;
  80                        write_dest_byte((char)(code >> 24) & 0xff);
  81                        write_dest_byte((char)(code >> 16) & 0xff);
  82                        write_dest_byte((char)(code >> 8) & 0xff);
  83                        write_dest_byte((char)(code) & 0xff);
  84
  85                        /* Output empty horizontal data */
  86                        for (i = 0; i < 360 * 2; ++i) {
  87                                write_dest_byte(0x80);
  88                                write_dest_byte(0x10);
  89                        }
  90                }
  91        }
  92
  93        return dest - base_address;
  94}
  95
  96void fill_frame(char *Frame, int Value)
  97{
  98        int *OddPtr32;
  99        int OddLine;
 100        int *EvenPtr32;
 101        int EvenLine;
 102        int i;
 103        int *data;
 104        int m, n;
 105
 106        /* fill odd and even frames */
 107        for (OddLine = 22, EvenLine = 285; OddLine < 263; OddLine++, EvenLine++) {
 108                OddPtr32 = (int *)((Frame + (OddLine * 1716)) + 276);
 109                EvenPtr32 = (int *)((Frame + (EvenLine * 1716)) + 276);
 110                for (i = 0; i < 360; i++, OddPtr32++, EvenPtr32++) {
 111                        *OddPtr32 = Value;
 112                        *EvenPtr32 = Value;
 113                }
 114        }
 115
 116        for (m = 0; m < VERTICAL; m++) {
 117                data = (int *)u_boot_logo.data;
 118                for (OddLine = (22 + m), EvenLine = (285 + m);
 119                     OddLine < (u_boot_logo.height * VERTICAL) + (22 + m);
 120                     OddLine += VERTICAL, EvenLine += VERTICAL) {
 121                        OddPtr32 = (int *)((Frame + ((OddLine) * 1716)) + 276);
 122                        EvenPtr32 =
 123                            (int *)((Frame + ((EvenLine) * 1716)) + 276);
 124                        for (i = 0; i < u_boot_logo.width / 2; i++) {
 125                                /* enlarge one pixel to m x n */
 126                                for (n = 0; n < HORIZONTAL; n++) {
 127                                        *OddPtr32++ = *data;
 128                                        *EvenPtr32++ = *data;
 129                                }
 130                                data++;
 131                        }
 132                }
 133        }
 134}
 135
 136static void video_init(char *NTSCFrame)
 137{
 138        NTSC_framebuffer_init(NTSCFrame);
 139        fill_frame(NTSCFrame, BLUE);
 140
 141        bfin_write_PPI_CONTROL(0x0082);
 142        bfin_write_PPI_FRAME(0x020D);
 143
 144        bfin_write_DMA0_START_ADDR(NTSCFrame);
 145        bfin_write_DMA0_X_COUNT(0x035A);
 146        bfin_write_DMA0_X_MODIFY(0x0002);
 147        bfin_write_DMA0_Y_COUNT(0x020D);
 148        bfin_write_DMA0_Y_MODIFY(0x0002);
 149        bfin_write_DMA0_CONFIG(0x1015);
 150        bfin_write_PPI_CONTROL(0x0083);
 151}
 152
 153void video_stop(void)
 154{
 155        bfin_write_PPI_CONTROL(0);
 156        bfin_write_DMA0_CONFIG(0);
 157}
 158
 159int drv_video_init(void)
 160{
 161        struct stdio_dev videodev;
 162
 163        video_init((void *)NTSC_FRAME_ADDR);
 164
 165        memset(&videodev, 0, sizeof(videodev));
 166        strcpy(videodev.name, "video");
 167        videodev.ext = DEV_EXT_VIDEO;
 168        videodev.flags = DEV_FLAGS_SYSTEM;
 169
 170        return stdio_register(&videodev);
 171}
 172