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u-boot/board/trab/vfd.c
Wolfgang Denk d053ce62cd Bugfix in VFD routine on TRAB board. 
Make sure upper lext pixel can be set to blue, too
(so far only red was possible).
Patch by Martin Krause, 15 Feb 2006
2006-07-19 14:23:12 +02:00

570 lines
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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>
DECLARE_GLOBAL_DATA_PTR;
#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
/* MAGIC */
#define FRAME_BUF_SIZE ((256*4*56)/8)
#define frame_buf_offs 4
/* defines for starting Timer3 as CPLD-Clk */
#define START3 (1 << 16)
#define UPDATE3 (1 << 17)
#define INVERT3 (1 << 18)
#define RELOAD3 (1 << 19)
/* CPLD-Register for controlling vfd-blank-signal */
#define VFD_DISABLE (*(volatile uchar *)0x04038000=0x0000)
#define VFD_ENABLE (*(volatile uchar *)0x04038000=0x0001)
/* Supported VFD Types */
#define VFD_TYPE_T119C 1 /* Noritake T119C VFD */
#define VFD_TYPE_MN11236 2
/*#define NEW_CPLD_CLK*/
int vfd_board_id;
/* taken from armboot/common/vfd.c */
unsigned long 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;
/*
* clear frame buffer (logical clear => set to "black")
*/
memset ((void *)(gd->fb_base), 0, FRAME_BUF_SIZE);
switch (gd->vfd_type) {
case VFD_TYPE_T119C:
for (display=0; display<4; display++) {
for(grid_cycle=0; grid_cycle<56; 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 = gd->fb_base + (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 = gd->fb_base+(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;
}
}
break;
case VFD_TYPE_MN11236:
for (display=0; display<4; display++) {
for (grid_cycle=0; grid_cycle<38; grid_cycle++) {
bit = grid_cycle * 256 * 4 +
(253 - grid_cycle) * 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 = gd->fb_base + (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<37)
bit = grid_cycle*256*4+(252-grid_cycle)*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 = gd->fb_base+(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;
}
}
break;
default:
printf ("Warning: unknown display type\n");
break;
}
}
/*
*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 long vfd_table[112][18][2][4][2];
unsigned int x, y, color, display, entry, pixel;
unsigned int x_abcdef = 0;
switch (gd->vfd_type) {
case VFD_TYPE_T119C:
for(y=0; y<=17; y++) { /* Line */
for(x=0; x<=111; x++) { /* Column */
for(display=0; display <=3; display++) {
/* Display 0 blue pixels */
vfd_table[x][y][0][display][0] =
(x==0) ? y*16+display
: (x%4)*4+y*16+((x-1)/2)*1024+display;
/* Display 0 red pixels */
vfd_table[x][y][1][display][0] =
(x==0) ? y*16+512+display
: (x%4)*4+y*16+((x-1)/2)*1024+512+display;
}
}
}
break;
case VFD_TYPE_MN11236:
for(y=0; y<=17; y++) { /* Line */
for(x=0; x<=111; x++) { /* Column */
for(display=0; display <=3; display++) {
vfd_table[x][y][0][display][0]=0;
vfd_table[x][y][0][display][1]=0;
vfd_table[x][y][1][display][0]=0;
vfd_table[x][y][1][display][1]=0;
switch (x%6) {
case 0: x_abcdef=0; break; /* a -> a */
case 1: x_abcdef=2; break; /* b -> c */
case 2: x_abcdef=4; break; /* c -> e */
case 3: x_abcdef=5; break; /* d -> f */
case 4: x_abcdef=3; break; /* e -> d */
case 5: x_abcdef=1; break; /* f -> b */
}
/* blue pixels */
vfd_table[x][y][0][display][0] =
(x>1) ? x_abcdef*4+((x-1)/3)*1024+y*48+display
: x_abcdef*4+ 0+y*48+display;
/* blue pixels */
if (x>1 && (x-1)%3)
vfd_table[x][y][0][display][1] = x_abcdef*4+((x-1)/3+1)*1024+y*48+display;
/* red pixels */
vfd_table[x][y][1][display][0] =
(x>1) ? x_abcdef*4+24+((x-1)/3)*1024+y*48+display
: x_abcdef*4+24+ 0+y*48+display;
/* red pixels */
if (x>1 && (x-1)%3)
vfd_table[x][y][1][display][1] = x_abcdef*4+24+((x-1)/3+1)*1024+y*48+display;
}
}
}
break;
default:
/* do nothing */
return;
}
/*
* 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<18;y++) {
for(x=0;x<112;x++) {
for(color=0;color<2;color++) {
for(display=0;display<4;display++) {
for(entry=0;entry<2;entry++) {
unsigned long adr = gd->fb_base;
unsigned int bit_nr = 0;
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 = gd->fb_base+(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 (! gd->vfd_type) {
/* Unknown type. */
return;
}
/* 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));
if (value)
temp |= (1<<bit_nr);
else
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);
}
}
}
if (display > 0)
display--;
else
display = 3;
}
}
/*
* This function initializes VFD clock that is needed for the CPLD that
* manages the keyboard.
*/
int vfd_init_clocks (void)
{
int i;
S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
S3C24X0_TIMERS * const timers = S3C24X0_GetBase_TIMERS();
S3C24X0_LCD * const lcd = S3C24X0_GetBase_LCD();
/* try to determine display type from the value
* defined by pull-ups
*/
gpio->PCUP = (gpio->PCUP & 0xFFF0); /* activate GPC0...GPC3 pullups */
gpio->PCCON = (gpio->PCCON & 0xFFFFFF00); /* configure GPC0...GPC3 as inputs */
/* allow signals to settle */
for (i=0; i<10000; i++) /* udelay isn't working yet at this point! */
__asm("NOP");
vfd_board_id = (~gpio->PCDAT) & 0x000F; /* read GPC0...GPC3 port pins */
VFD_DISABLE; /* activate blank for the vfd */
#define NEW_CPLD_CLK
#ifdef NEW_CPLD_CLK
if (vfd_board_id) {
/* If new board revision, then use PWM 3 as cpld-clock */
/* Enable 500 Hz timer for fill level sensor to operate properly */
/* Configure TOUT3 as functional pin, disable pull-up */
gpio->PDCON &= ~0x30000;
gpio->PDCON |= 0x20000;
gpio->PDUP |= (1 << 8);
/* Configure the prescaler */
timers->TCFG0 &= ~0xff00;
timers->TCFG0 |= 0x0f00;
/* Select MUX input (divider) for timer3 (1/16) */
timers->TCFG1 &= ~0xf000;
timers->TCFG1 |= 0x3000;
/* Enable autoreload and set the counter and compare
* registers to values for the 500 Hz clock
* (for a given prescaler (15) and divider (16)):
* counter = (66000000 / 500) >> 9;
*/
timers->ch[3].TCNTB = 0x101;
timers->ch[3].TCMPB = 0x101 / 2;
/* Start timer */
timers->TCON = (timers->TCON | UPDATE3 | RELOAD3) & ~INVERT3;
timers->TCON = (timers->TCON | START3) & ~UPDATE3;
}
#endif
/* If old board revision, then use vm-signal as cpld-clock */
lcd->LCDCON2 = 0x00FFC000;
lcd->LCDCON3 = 0x0007FF00;
lcd->LCDCON4 = 0x00000000;
lcd->LCDCON5 = 0x00000400;
lcd->LCDCON1 = 0x00000B75;
/* VM (GPD1) is used as clock for the CPLD */
gpio->PDCON = (gpio->PDCON & 0xFFFFFFF3) | 0x00000008;
return 0;
}
/*
* initialize LCD-Controller of the S3C2400 for using VFDs
*
* VFD detection depends on the board revision:
* starting from Rev. 200 a type code can be read from the data pins,
* driven by some pull-up resistors; all earlier systems must be
* manually configured. The type is set in the "vfd_type" environment
* variable.
*/
int drv_vfd_init(void)
{
S3C24X0_LCD * const lcd = S3C24X0_GetBase_LCD();
S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
char *tmp;
ulong palette;
static int vfd_init_done = 0;
int vfd_inv_data = 0;
if (vfd_init_done != 0)
return (0);
vfd_init_done = 1;
debug("Detecting Revison of WA4-VFD: ID=0x%X\n", vfd_board_id);
switch (vfd_board_id) {
case 0: /* board revision < Rev.200 */
if ((tmp = getenv ("vfd_type")) == NULL) {
break;
}
if (strcmp(tmp, "T119C") == 0) {
gd->vfd_type = VFD_TYPE_T119C;
} else if (strcmp(tmp, "MN11236") == 0) {
gd->vfd_type = VFD_TYPE_MN11236;
} else {
/* cannot use printf for a warning here */
gd->vfd_type = 0; /* unknown */
}
break;
default: /* default to MN11236, data inverted */
gd->vfd_type = VFD_TYPE_MN11236;
vfd_inv_data = 1;
setenv ("vfd_type", "MN11236");
}
debug ("VFD type: %s%s\n",
(gd->vfd_type == VFD_TYPE_T119C) ? "T119C" :
(gd->vfd_type == VFD_TYPE_MN11236) ? "MN11236" :
"unknown",
vfd_inv_data ? ", inverted data" : "");
gd->fb_base = gd->fb_base;
create_vfd_table();
init_grid_ctrl();
for (palette=0; palette < 16; palette++)
(*(volatile unsigned int*)(PALETTE+(palette*4)))=palette;
for (palette=16; palette < 256; palette++)
(*(volatile unsigned int*)(PALETTE+(palette*4)))=0x00;
/*
* 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
*/
/* Stopp LCD-Controller */
lcd->LCDCON1 = 0x00000000;
/* frame buffer startadr */
lcd->LCDSADDR1 = gd->fb_base >> 1;
/* frame buffer endadr */
lcd->LCDSADDR2 = (gd->fb_base + FRAME_BUF_SIZE) >> 1;
lcd->LCDSADDR3 = ((256/4));
lcd->LCDCON2 = 0x000DC000;
if(gd->vfd_type == VFD_TYPE_MN11236)
lcd->LCDCON2 = 37 << 14; /* MN11236: 38 lines */
else
lcd->LCDCON2 = 55 << 14; /* T119C: 56 lines */
lcd->LCDCON3 = 0x0051000A;
lcd->LCDCON4 = 0x00000001;
if (gd->vfd_type && vfd_inv_data)
lcd->LCDCON5 = 0x000004C0;
else
lcd->LCDCON5 = 0x00000440;
/* Port pins as LCD output */
gpio->PCCON = (gpio->PCCON & 0xFFFFFF00)| 0x000000AA;
gpio->PDCON = (gpio->PDCON & 0xFFFFFF03)| 0x000000A8;
/* Synchronize VFD enable with LCD controller to avoid flicker */
lcd->LCDCON1 = 0x00000B75; /* Start LCD-Controller */
while((lcd->LCDCON5 & 0x180000)!=0x100000); /* Wait for end of VSYNC */
while((lcd->LCDCON5 & 0x060000)!=0x040000); /* Wait for next HSYNC */
while((lcd->LCDCON5 & 0x060000)==0x040000);
while((lcd->LCDCON5 & 0x060000)!=0x000000);
if(gd->vfd_type)
VFD_ENABLE;
debug ("LCDSADDR1: %lX\n", lcd->LCDSADDR1);
debug ("LCDSADDR2: %lX\n", lcd->LCDSADDR2);
debug ("LCDSADDR3: %lX\n", lcd->LCDSADDR3);
return 0;
}
/*
* Disable VFD: should be run before resetting the system:
* disable VM, enable pull-up
*/
void disable_vfd (void)
{
S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
VFD_DISABLE;
gpio->PDCON &= ~0xC;
gpio->PDUP &= ~0x2;
}
/************************************************************************/
/* ** 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;
/* 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);
}
/*
* Calculate fb size for VIDEOLFB_ATAG. Size returned contains fb,
* descriptors and palette areas.
*/
ulong calc_fbsize (void)
{
return FRAME_BUF_SIZE;
}
#endif /* CONFIG_VFD */
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