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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;
static int vfd_init_done = 0;
DECLARE_GLOBAL_DATA_PTR;
if (vfd_init_done != 0)
return;
vfd_init_done = 1;
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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