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-rw-r--r--board/trab/vfd.c414
1 files changed, 414 insertions, 0 deletions
diff --git a/board/trab/vfd.c b/board/trab/vfd.c
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+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering -- wd@denx.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
+ */
+
+/************************************************************************/
+/* ** DEBUG SETTINGS */
+/************************************************************************/
+
+/* #define DEBUG */
+
+/************************************************************************/
+/* ** HEADER FILES */
+/************************************************************************/
+
+#include <config.h>
+#include <common.h>
+#include <version.h>
+#include <stdarg.h>
+#include <linux/types.h>
+#include <devices.h>
+#include <s3c2400.h>
+
+#ifdef CONFIG_VFD
+
+/************************************************************************/
+/* ** CONFIG STUFF -- should be moved to board config file */
+/************************************************************************/
+
+/************************************************************************/
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE 4096
+#endif
+
+#define ROT 0x09
+#define BLAU 0x0C
+#define VIOLETT 0X0D
+
+ulong vfdbase;
+ulong frame_buf_size;
+#define frame_buf_offs 4
+
+/* taken from armboot/common/vfd.c */
+ulong adr_vfd_table[112][18][2][4][2];
+unsigned char bit_vfd_table[112][18][2][4][2];
+
+/*
+ * initialize the values for the VFD-grid-control in the framebuffer
+ */
+void init_grid_ctrl(void)
+{
+ ulong adr, grid_cycle;
+ unsigned int bit, display;
+ unsigned char temp, bit_nr;
+
+ for (adr=vfdbase; adr<=(vfdbase+7168); adr+=4) /*clear frame buffer */
+ (*(volatile ulong*)(adr))=0;
+
+ for(display=0;display<=3;display++)
+ {
+ for(grid_cycle=0;grid_cycle<=55;grid_cycle++)
+ {
+ bit = grid_cycle*256*4+(grid_cycle+200)*4+frame_buf_offs+display;
+ /* wrap arround if offset (see manual S3C2400) */
+ if (bit>=frame_buf_size*8)
+ bit = bit-(frame_buf_size*8);
+ adr = vfdbase+(bit/32)*4+(3-(bit%32)/8);
+ bit_nr = bit%8;
+ bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
+ temp=(*(volatile unsigned char*)(adr));
+ temp|=(1<<bit_nr);
+ (*(volatile unsigned char*)(adr))=temp;
+
+ if(grid_cycle<55)
+ bit = grid_cycle*256*4+(grid_cycle+201)*4+frame_buf_offs+display;
+ else
+ bit = grid_cycle*256*4+200*4+frame_buf_offs+display-4; /* grid nr. 0 */
+ /* wrap arround if offset (see manual S3C2400) */
+ if (bit>=frame_buf_size*8)
+ bit = bit-(frame_buf_size*8);
+ adr = vfdbase+(bit/32)*4+(3-(bit%32)/8);
+ bit_nr = bit%8;
+ bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
+ temp=(*(volatile unsigned char*)(adr));
+ temp|=(1<<bit_nr);
+ (*(volatile unsigned char*)(adr))=temp;
+ }
+ }
+}
+
+/*
+ *create translation table for getting easy the right position in the
+ *physical framebuffer for some x/y-coordinates of the VFDs
+ */
+void create_vfd_table(void)
+{
+ unsigned int vfd_table[112][18][2][4][2];
+ ulong adr;
+ unsigned int x, y, color, display, entry, pixel, bit_nr;
+
+ /*
+ * Create translation table for Noritake-T119C-VFD-specific
+ * organized frame-buffer.
+ * Created is the number of the bit in the framebuffer (the
+ * first transferred pixel of each frame is bit 0).
+ */
+ for(y=0;y<=17;y++) /* Zeile */
+ {
+ for(x=0;x<=111;x++) /* Spalten */
+ {
+ /*Display 0 blaue Pixel Eintrag 1 */
+ vfd_table[x][y][0][0][0]=((x%4)*4+y*16+(x/4)*2048);
+ /*Display 0 rote Pixel Eintrag 1 */
+ vfd_table[x][y][1][0][0]=((x%4)*4+y*16+(x/4)*2048+512);
+ if(x<=1)
+ {
+ /*Display 0 blaue Pixel Eintrag 2 */
+ vfd_table[x][y][0][0][1]=(((x+112)%4)*4+y*16+((x+110)/4)*2048+1024);
+ /*Display 0 rote Pixel Eintrag 2 */
+ vfd_table[x][y][1][0][1]=(((x+112)%4)*4+y*16+((x+110)/4)*2048+512+1024);
+ }
+ else
+ {
+ /*Display 0 blaue Pixel Eintrag 2 */
+ vfd_table[x][y][0][0][1]=((x%4)*4+y*16+((x-2)/4)*2048+1024);
+ /*Display 0 rote Pixel Eintrag 2 */
+ vfd_table[x][y][1][0][1]=((x%4)*4+y*16+((x-2)/4)*2048+512+1024);
+ }
+ /*Display 1 blaue Pixel Eintrag 1 */
+ vfd_table[x][y][0][1][0]=((x%4)*4+y*16+(x/4)*2048+1);
+ /*Display 1 rote Pixel Eintrag 1 */
+ vfd_table[x][y][1][1][0]=((x%4)*4+y*16+(x/4)*2048+512+1);
+ if(x<=1)
+ {
+ /*Display 1 blaue Pixel Eintrag 2 */
+ vfd_table[x][y][0][1][1]=(((x+112)%4)*4+y*16+((x+110)/4)*2048+1+1024);
+ /*Display 1 rote Pixel Eintrag 2 */
+ vfd_table[x][y][1][1][1]=(((x+112)%4)*4+y*16+((x+110)/4)*2048+512+1+1024);
+ }
+ else
+ {
+ /*Display 1 blaue Pixel Eintrag 2 */
+ vfd_table[x][y][0][1][1]=((x%4)*4+y*16+((x-2)/4)*2048+1+1024);
+ /*Display 1 rote Pixel Eintrag 2 */
+ vfd_table[x][y][1][1][1]=((x%4)*4+y*16+((x-2)/4)*2048+512+1+1024);
+ }
+ /*Display 2 blaue Pixel Eintrag 1 */
+ vfd_table[x][y][0][2][0]=((x%4)*4+y*16+(x/4)*2048+2);
+ /*Display 2 rote Pixel Eintrag 1 */
+ vfd_table[x][y][1][2][0]=((x%4)*4+y*16+(x/4)*2048+512+2);
+ if(x<=1)
+ {
+ /*Display 2 blaue Pixel Eintrag 2 */
+ vfd_table[x][y][0][2][1]=(((x+112)%4)*4+y*16+((x+110)/4)*2048+2+1024);
+ /*Display 2 rote Pixel Eintrag 2 */
+ vfd_table[x][y][1][2][1]=(((x+112)%4)*4+y*16+((x+110)/4)*2048+512+2+1024);
+ }
+ else
+ {
+ /*Display 2 blaue Pixel Eintrag 2 */
+ vfd_table[x][y][0][2][1]=((x%4)*4+y*16+((x-2)/4)*2048+2+1024);
+ /*Display 2 rote Pixel Eintrag 2 */
+ vfd_table[x][y][1][2][1]=((x%4)*4+y*16+((x-2)/4)*2048+512+2+1024);
+ }
+ /*Display 3 blaue Pixel Eintrag 1 */
+ vfd_table[x][y][0][3][0]=((x%4)*4+y*16+(x/4)*2048+3);
+ /*Display 3 rote Pixel Eintrag 1 */
+ vfd_table[x][y][1][3][0]=((x%4)*4+y*16+(x/4)*2048+512+3);
+ if(x<=1)
+ {
+ /*Display 3 blaue Pixel Eintrag 2 */
+ vfd_table[x][y][0][3][1]=(((x+112)%4)*4+y*16+((x+110)/4)*2048+3+1024);
+ /*Display 3 rote Pixel Eintrag 2 */
+ vfd_table[x][y][1][3][1]=(((x+112)%4)*4+y*16+((x+110)/4)*2048+512+3+1024);
+ }
+ else
+ {
+ /*Display 3 blaue Pixel Eintrag 2 */
+ vfd_table[x][y][0][3][1]=((x%4)*4+y*16+((x-2)/4)*2048+3+1024);
+ /*Display 3 rote Pixel Eintrag 2 */
+ vfd_table[x][y][1][3][1]=((x%4)*4+y*16+((x-2)/4)*2048+512+3+1024);
+ }
+ }
+ }
+
+ /*
+ * Create translation table for Noritake-T119C-VFD-specific
+ * organized frame-buffer
+ * Create table with entries for physical byte adresses and
+ * bit-number within the byte
+ * from table with bit-numbers within the total framebuffer
+ */
+ for(y=0;y<=17;y++)
+ {
+ for(x=0;x<=111;x++)
+ {
+ for(color=0;color<=1;color++)
+ {
+ for(display=0;display<=3;display++)
+ {
+ for(entry=0;entry<=1;entry++)
+ {
+ pixel = vfd_table[x][y][color][display][entry] + frame_buf_offs;
+ /*
+ * wrap arround if offset
+ * (see manual S3C2400)
+ */
+ if (pixel>=frame_buf_size*8)
+ pixel = pixel-(frame_buf_size*8);
+ adr = vfdbase+(pixel/32)*4+(3-(pixel%32)/8);
+ bit_nr = pixel%8;
+ bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
+ adr_vfd_table[x][y][color][display][entry] = adr;
+ bit_vfd_table[x][y][color][display][entry] = bit_nr;
+ }
+ }
+ }
+ }
+ }
+}
+
+/*
+ * Set/clear pixel of the VFDs
+ */
+void set_vfd_pixel(unsigned char x, unsigned char y, unsigned char color, unsigned char display, unsigned char value)
+{
+ ulong adr;
+ unsigned char bit_nr, temp;
+
+ if (value!=0)
+ {
+ /* Pixel-Eintrag Nr. 1 */
+ adr = adr_vfd_table[x][y][color][display][0];
+ /* Pixel-Eintrag Nr. 1 */
+ bit_nr = bit_vfd_table[x][y][color][display][0];
+ temp=(*(volatile unsigned char*)(adr));
+ temp|=1<<bit_nr;
+ (*(volatile unsigned char*)(adr))=temp;
+
+ /* Pixel-Eintrag Nr. 2 */
+ adr = adr_vfd_table[x][y][color][display][1];
+ /* Pixel-Eintrag Nr. 2 */
+ bit_nr = bit_vfd_table[x][y][color][display][1];
+ temp=(*(volatile unsigned char*)(adr));
+ temp|=1<<bit_nr;
+ (*(volatile unsigned char*)(adr))=temp;
+ }
+ else
+ {
+ /* Pixel-Eintrag Nr. 1 */
+ adr = adr_vfd_table[x][y][color][display][0];
+ /* Pixel-Eintrag Nr. 1 */
+ bit_nr = bit_vfd_table[x][y][color][display][0];
+ temp=(*(volatile unsigned char*)(adr));
+ temp&=~(1<<bit_nr);
+ (*(volatile unsigned char*)(adr))=temp;
+
+ /* Pixel-Eintrag Nr. 2 */
+ adr = adr_vfd_table[x][y][color][display][1];
+ /* Pixel-Eintrag Nr. 2 */
+ bit_nr = bit_vfd_table[x][y][color][display][1];
+ temp=(*(volatile unsigned char*)(adr));
+ temp&=~(1<<bit_nr);
+ (*(volatile unsigned char*)(adr))=temp;
+ }
+}
+
+/*
+ * transfer image from BMP-File
+ */
+void transfer_pic(int display, unsigned char *adr, int height, int width)
+{
+ int x, y;
+ unsigned char temp;
+
+ for (; height > 0; height -= 18)
+ {
+ if (height > 18)
+ y = 18;
+ else
+ y = height;
+ for (; y > 0; y--)
+ {
+ for (x = 0; x < width; x += 2)
+ {
+ temp = *adr++;
+ set_vfd_pixel(x, y-1, 0, display, 0);
+ set_vfd_pixel(x, y-1, 1, display, 0);
+ if ((temp >> 4) == BLAU)
+ set_vfd_pixel(x, y-1, 0, display, 1);
+ else if ((temp >> 4) == ROT)
+ set_vfd_pixel(x, y-1, 1, display, 1);
+ else if ((temp >> 4) == VIOLETT)
+ {
+ set_vfd_pixel(x, y-1, 0, display, 1);
+ set_vfd_pixel(x, y-1, 1, display, 1);
+ }
+ set_vfd_pixel(x+1, y-1, 0, display, 0);
+ set_vfd_pixel(x+1, y-1, 1, display, 0);
+ if ((temp & 0x0F) == BLAU)
+ set_vfd_pixel(x+1, y-1, 0, display, 1);
+ else if ((temp & 0x0F) == ROT)
+ set_vfd_pixel(x+1, y-1, 1, display, 1);
+ else if ((temp & 0x0F) == VIOLETT)
+ {
+ set_vfd_pixel(x+1, y-1, 0, display, 1);
+ set_vfd_pixel(x+1, y-1, 1, display, 1);
+ }
+ }
+ }
+ display++;
+ if (display > 3)
+ display = 0;
+ }
+}
+
+/*
+ * initialize LCD-Controller of the S3C2400 for using VFDs
+ */
+int drv_vfd_init(void)
+{
+ ulong palette;
+
+ DECLARE_GLOBAL_DATA_PTR;
+
+ vfdbase = gd->fb_base;
+ create_vfd_table();
+ init_grid_ctrl();
+
+ /*
+ * Hinweis: Der Framebuffer ist um genau ein Nibble verschoben
+ * Das erste angezeigte Pixel wird aus dem zweiten Nibble geholt
+ * das letzte angezeigte Pixel wird aus dem ersten Nibble geholt
+ * (wrap around)
+ * see manual S3C2400
+ */
+ /* frame buffer startadr */
+ rLCDSADDR1 = vfdbase >> 1;
+ /* frame buffer endadr */
+ rLCDSADDR2 = (vfdbase + frame_buf_size) >> 1;
+ rLCDSADDR3 = ((256/4));
+
+ /* Port-Pins als LCD-Ausgang */
+ rPCCON = (rPCCON & 0xFFFFFF00)| 0x000000AA;
+ /* Port-Pins als LCD-Ausgang */
+ rPDCON = (rPDCON & 0xFFFFFF03)| 0x000000A8;
+#ifdef WITH_VFRAME
+ /* mit VFRAME zum Messen */
+ rPDCON = (rPDCON & 0xFFFFFF00)| 0x000000AA;
+#endif
+
+ rLCDCON2 = 0x000DC000;
+ rLCDCON3 = 0x0051000A;
+ rLCDCON4 = 0x00000001;
+ rLCDCON5 = 0x00000440;
+ rLCDCON1 = 0x00000B75;
+
+ debug ("LCDSADDR1: %lX\n", rLCDSADDR1);
+ debug ("LCDSADDR2: %lX\n", rLCDSADDR2);
+ debug ("LCDSADDR3: %lX\n", rLCDSADDR3);
+
+ for(palette=0;palette<=15;palette++)
+ (*(volatile unsigned int*)(PALETTE+(palette*4)))=palette;
+ for(palette=16;palette<=255;palette++)
+ (*(volatile unsigned int*)(PALETTE+(palette*4)))=0x00;
+
+ return 0;
+}
+
+/************************************************************************/
+/* ** ROM capable initialization part - needed to reserve FB memory */
+/************************************************************************/
+
+/*
+ * This is called early in the system initialization to grab memory
+ * for the VFD controller.
+ *
+ * Note that this is running from ROM, so no write access to global data.
+ */
+ulong vfd_setmem (ulong addr)
+{
+ ulong size;
+
+ /* MAGIC */
+ frame_buf_size = (256*4*56)/8;
+
+ /* Round up to nearest full page */
+ size = (frame_buf_size + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+
+ debug ("Reserving %ldk for VFD Framebuffer at: %08lx\n", size>>10, addr);
+
+ return (size);
+}
+
+#endif /* CONFIG_VFD */
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