/*
* SED1356 Support for KIT637_V6 (CSB637)
*
* Based upon code from MicroMonitor 1.17 from http://www.umonfw.com/
* which includes this notice:
*
**************************************************************************
* General notice:
* This code is part of a boot-monitor package developed as a generic base
* platform for embedded system designs. As such, it is likely to be
* distributed to various projects beyond the control of the original
* author. Please notify the author of any enhancements made or bugs found
* so that all may benefit from the changes. In addition, notification back
* to the author will allow the new user to pick up changes that may have
* been made by other users after this version of the code was distributed.
*
* Note1: the majority of this code was edited with 4-space tabs.
* Note2: as more and more contributions are accepted, the term "author"
* is becoming a mis-representation of credit.
*
* Original author: Ed Sutter
* Email: esutter@alcatel-lucent.com
* Phone: 908-582-2351
**************************************************************************
*
* Ed Sutter has been informed that this code is being used in RTEMS.
*
* This code was reformatted by Joel Sherrill from OAR Corporation and
* Fernando Nicodemos <fgnicodemos@terra.com.br> from NCB - Sistemas
* Embarcados Ltda. (Brazil) to be more compliant with RTEMS coding
* standards and to eliminate C++ style comments.
*
* $Id$
*/
#include <bsp.h>
#include <stdlib.h>
#include <stdio.h>
#include "sed1356.h"
#include "font8x16.h"
int mode900lq;
long PIXELS_PER_ROW;
long PIXELS_PER_COL;
long COLS_PER_SCREEN;
long ROWS_PER_SCREEN;
long SED_HOR_PULSE_WIDTH_LCD;
long SED_VER_PULSE_START_LCD;
long SED_HOR_PULSE_START_LCD;
long SED_HOR_NONDISP_LCD;
long SED_VER_NONDISP_LCD;
long SED_VER_PULSE_WIDTH_LCD;
/* globals to keep track of foreground, background colors and x,y position */
int sed_color_depth; /* 4, 8 or 16 */
int sed_fg_color; /* 0 to 15, used as lookup into VGA color table */
int sed_bg_color; /* 0 to 15, used as lookup into VGA color table */
int sed_col; /* current column, 0 to COLS_PER_SCREEN - 1 */
int sed_row; /* current row, 0 to (ROWS_PER_SCREEN * 2) - 1 */
int sed_disp_mode_crt; /* CRT=1, LCD=0 */
int sed135x_ok;
int sed135x_tst;
uint32_t sed_fb_offset; /* current offset into frame buffer for sed_putchar */
void sed_writechar(uint8_t c);
void sed_scroll(void);
#define SED_REG_BASE 0x30000000 /* *CS2 */
#define SED_MEM_BASE (SED_REG_BASE + 0x00200000)
#define SED_STEP 1 /* 16-bit port on 16-bit boundry */
#define SED_REG16(_x_) *(volatile uint16_t *)((uint32_t)SED_REG_BASE + (((uint32_t)_x_ * SED_STEP) ^ 0)) /* Control/Status Registers, 16-bit mode */
#define RD_FB16(_reg_,_val_) ((_val_) = *((volatile uint16_t *)(((uint32_t)SED_MEM_BASE + ((uint32_t)(_reg_ * SED_STEP) ^ 0)))))
#define WR_FB16(_reg_,_val_) (*((volatile uint16_t *)(((uint32_t)SED_MEM_BASE + ((uint32_t)(_reg_ * SED_STEP) ^ 0)))) = (_val_))
#if 0
#define SED1356_REG_LCD_HOR_DISP SED_REG16(0x32)
#define SED1356_REG_LCD_HOR_NONDISP_and_START SED_REG16(0x34)
#define SED1356_REG_LCD_HOR_PULSE SED_REG16(0x36)
#define SED1356_REG_LCD_VER_DISP_HT_LO_and_HI SED_REG16(0x38)
#define SED1356_REG_LCD_VER_NONDISP_and_START SED_REG16(0x3a)
#define SED1356_REG_LCD_VER_PULSE SED_REG16(0x3c)
#define SED1356_REG_LCD_DISP_MODE_and_MISC SED_REG16(0x40)
#define SED1356_REG_LCD_DISP_START_LO_and_MID SED_REG16(0x42)
#define SED1356_REG_LCD_DISP_START_HI SED_REG16(0x44)
#define SED1356_REG_LCD_ADD_OFFSET_LO_and_HI SED_REG16(0x46)
#define SED1356_REG_LCD_PIXEL_PAN SED_REG16(0x48)
#define SED1356_REG_LCD_FIFO_THRESH_LO_and_HI SED_REG16(0x4a)
#endif
#define H2SED(_x_) (_x_)
#define FB_SIZE (640 * 480)
#define SED_ROW_SIZE(_depth_) ((PIXELS_PER_ROW * _depth_) / 8)
#define SED_FB_SIZE(_depth_) (((PIXELS_PER_COL * PIXELS_PER_ROW) * _depth_) / 8)
#define FONT_WIDTH 8
#define FONT_HEIGHT 16
#define SED_GET_ADD(_row_, _col_, _depth_) \
(((((_row_ * PIXELS_PER_ROW) * FONT_HEIGHT) \
+ (_col_ * FONT_WIDTH)) \
* _depth_) / 8)
#define SED_GET_PHYS_ADD(_reg_) \
(volatile unsigned long)(SED_MEM_BASE + ((_reg_ * SED_STEP) ^ 0))
#include "sed1356_16bit.h"
/* #define SED_DBG */
int sed135x_tst = 0;
void sed_write_frame_buffer(
uint32_t i,
uint16_t wr16
)
{
WR_FB16(i, wr16);
}
int sed_frame_buffer_size(void)
{
return SED_FB_SIZE(sed_color_depth);
}
void sed_clr_row(int char_row)
{
unsigned long sed_mem_add;
int i;
uint16_t wr16;
/* clear the desired row */
sed_mem_add = SED_GET_ADD(char_row, 0, sed_color_depth);
#ifdef SED_DBG
sed135x_tst = 1;
printf("SED Clear Row %d, FB Add 0x%08lx, CPU Add 0x%08lx.\n ", char_row, sed_mem_add, SED_GET_PHYS_ADD(sed_mem_add));
sed135x_tst = 0;
#endif
switch (sed_color_depth)
{
case 4:
wr16 = ((sed_bg_color << 12) | (sed_bg_color << 8) | (sed_bg_color << 4) | (sed_bg_color << 0));
#ifdef SED_DBG
sed135x_tst = 1;
printf("SED Clear Row %d, FB Add 0x%08lx to 0x%08lx.\n ", char_row, sed_mem_add, sed_mem_add + ((PIXELS_PER_ROW * FONT_HEIGHT) / 2));
sed135x_tst = 0;
#endif
for (i = 0; i < ((PIXELS_PER_ROW * FONT_HEIGHT) / 2); i += 2){
WR_FB16(sed_mem_add, wr16);
sed_mem_add += 2;
} /* for font_row */
break;
case 8:
wr16 = ((sed_bg_color << 8) | (sed_bg_color << 0));
for (i = 0; i < (PIXELS_PER_ROW * FONT_HEIGHT); i += 2){
WR_FB16(sed_mem_add, wr16);
sed_mem_add += 2;
} /* for font_row */
break;
case 16:
wr16 = ((vga_lookup[sed_bg_color]));
for (i = 0; i < ((PIXELS_PER_ROW * FONT_HEIGHT) * 2); i += 2){
WR_FB16(sed_mem_add, wr16);
sed_mem_add += 2;
} /* for font_row */
break;
} /* switch sed_color_depth */
} /* sed_clr_row */
void sed_init(void)
{
mode900lq = 0;
PIXELS_PER_ROW = 640;
PIXELS_PER_COL = 480;
COLS_PER_SCREEN = 80;
ROWS_PER_SCREEN = 30;
SED_HOR_PULSE_WIDTH_LCD = 0x0b;
SED_HOR_NONDISP_LCD = 0x13;
SED_VER_PULSE_WIDTH_LCD = 0x01;
SED_VER_PULSE_START_LCD = 0x09;
SED_VER_NONDISP_LCD = 0x2c;
sed_color_depth = 16; /* 16 => vga lookup */
sed_fg_color = 14; /* Bright Yellow */
sed_bg_color = 1; /* Blue */
sed_disp_mode_crt = 0; /* default to LCD */
sed_fb_offset = 0x00;
sed_row = 0;
sed_col = 0;
sed135x_ok = 1;
sed135x_tst = 0;
sed_clearscreen();
}
/*
* sed_putchar()
*
* This routine parses the character and calls sed_writechar if it is a
* printable character
*/
void sed_putchar(char c)
{
if ((sed135x_ok == 0) || (sed135x_tst == 1)) return;
/* First parse the character to see if it printable or an
* acceptable control character.
*/
switch (c) {
case '\r':
sed_col = 0;
return;
case '\n':
sed_col = 0;
sed_scroll();
return;
case '\b':
sed_col--;
if (sed_col < 0) {
sed_row--;
if (sed_row < 0)
sed_row = 0;
sed_col = COLS_PER_SCREEN - 1;
}
c = 0; /* erase the character */
sed_writechar(c);
break;
default:
if (((uint8_t)c < FIRST_CHAR) || ((uint8_t)c > LAST_CHAR))
return; /* drop anything we can't print */
c -= FIRST_CHAR; /* get aligned to the first printable character */
sed_writechar(c);
/* advance to next column */
sed_col++;
if (sed_col == COLS_PER_SCREEN) {
sed_col = 0;
sed_scroll();
}
break;
}
} /* sed_putchar() */
/*
* sed_writechar()
*
* This routine writes the character to the screen at the current cursor
* location.
*/
void sed_writechar(uint8_t c)
{
uint32_t sed_mem_add;
int font_row, font_col;
uint8_t font_data8;
uint16_t wr16;
/* Convert the current row,col and color depth values
* into an address
*/
sed_mem_add = SED_GET_ADD(sed_row, sed_col, sed_color_depth);
#ifdef SED_DBG
sed135x_tst = 1;
printf("SED writechar at row %d, col %d, FB Add 0x%08lx, CPU Add 0x%08lx.\n ", sed_row, sed_col, sed_mem_add, SED_GET_PHYS_ADD(sed_mem_add));
sed135x_tst = 0;
#endif
if (FONT_WIDTH == 8) {
switch (sed_color_depth) {
case 4:
/* Now render the font by painting one font row at a time */
for (font_row = 0; font_row < FONT_HEIGHT; font_row++) {
/* get the font row of data */
font_data8 = font8x16[(c * FONT_HEIGHT) + font_row];
for (font_col = 0; font_col < 8; font_col += 4)
{
/* get a words worth of pixels */
wr16 = (((font_data8 & 0x80) ? sed_fg_color << 12 : sed_bg_color << 12)
| ((font_data8 & 0x40) ? sed_fg_color << 8 : sed_bg_color << 8)
| ((font_data8 & 0x20) ? sed_fg_color << 4 : sed_bg_color << 4)
| ((font_data8 & 0x10) ? sed_fg_color << 0 : sed_bg_color << 0));
font_data8 = font_data8 << 4;
WR_FB16(sed_mem_add, wr16);
/* if we are in the 2nd frame buffer, write to the 1st
* frame buffer also
*/
if (sed_row > (ROWS_PER_SCREEN - 1)) {
WR_FB16((sed_mem_add - SED_FB_SIZE(sed_color_depth)), wr16);
}
sed_mem_add += 2;
} /* for font_col */
/* go to the next pixel row */
sed_mem_add += (SED_ROW_SIZE(sed_color_depth) - ((FONT_WIDTH * sed_color_depth) / 8));
} /* for font_row */
break;
case 8:
/* Now render the font by painting one font row at a time */
for (font_row = 0; font_row < FONT_HEIGHT; font_row++) {
/* get the font row of data */
font_data8 = font8x16[(c * FONT_HEIGHT) + font_row];
for (font_col = 0; font_col < 8; font_col += 2)
{
/* get a words worth of pixels */
wr16 = (((font_data8 & 0x80) ? sed_fg_color << 8 : sed_bg_color << 8)
| ((font_data8 & 0x40) ? sed_fg_color << 0 : sed_bg_color << 0));
font_data8 = font_data8 << 2;
WR_FB16(sed_mem_add, wr16);
/* if we are in the 2nd frame buffer, write to the 1st
* frame buffer also
*/
if (sed_row > (ROWS_PER_SCREEN - 1)) {
WR_FB16((sed_mem_add - SED_FB_SIZE(sed_color_depth)), wr16);
}
sed_mem_add += 2;
} /* for font_col */
/* go to the next pixel row */
sed_mem_add += (SED_ROW_SIZE(sed_color_depth) - ((FONT_WIDTH * sed_color_depth) / 8));
} /* for font_row */
break;
case 16:
/* Now render the font by painting one font row at a time */
for (font_row = 0; font_row < FONT_HEIGHT; font_row++) {
/* get the font row of data */
font_data8 = font8x16[(c * FONT_HEIGHT) + font_row];
for (font_col = 0; font_col < 8; font_col++)
{
/* get a words worth of pixels */
wr16 = ((font_data8 & 0x80) ?
vga_lookup[sed_fg_color] : vga_lookup[sed_bg_color]);
font_data8 = font_data8 << 1;
WR_FB16(sed_mem_add, wr16);
/* if we are in the 2nd frame buffer, write to the 1st
* frame buffer also.
*/
if (sed_row > (ROWS_PER_SCREEN - 1)) {
WR_FB16((sed_mem_add - SED_FB_SIZE(sed_color_depth)), wr16);
}
sed_mem_add += 2;
} /* for font_col */
/* go to the next pixel row */
sed_mem_add += (SED_ROW_SIZE(sed_color_depth) - ((FONT_WIDTH * sed_color_depth) / 8));
} /* for font_row */
break;
} /* switch sed_color depth */
} /* FONT_WIDTH == 8 */
else
{
return;
}
} /* sed_writechar() */
void sed_update_fb_offset(void)
{
/* write the new sed_fb_offset value */
if (sed_disp_mode_crt) {
/* before we change the address offset, wait for the display to
* go from active to non-active, unless the display is not enabled
*/
if (SED1356_REG_DISP_MODE & H2SED(SED1356_DISP_MODE_CRT)) { /* CRT is on */
while ((SED1356_REG_CRT_VER_NONDISP_and_START & H2SED(SED1356_VER_NONDISP)) == 0) {}
while ((SED1356_REG_CRT_VER_NONDISP_and_START & H2SED(SED1356_VER_NONDISP)) == 1) {}
}
SED1356_REG_CRT_DISP_START_LO_and_MID = H2SED(((sed_fb_offset & 0x00ffff) >> 0));
SED1356_REG_CRT_DISP_START_HI = H2SED(((sed_fb_offset & 0x070000) >> 16));
}
else /* LCD */
{
if (SED1356_REG_DISP_MODE & H2SED(SED1356_DISP_MODE_LCD)) { /* LCD is on */
while ((SED1356_REG_LCD_VER_NONDISP_and_START & H2SED(SED1356_VER_NONDISP)) == 0) {}
while ((SED1356_REG_LCD_VER_NONDISP_and_START & H2SED(SED1356_VER_NONDISP)) == 1) {}
}
SED1356_REG_LCD_DISP_START_LO_and_MID = H2SED(((sed_fb_offset & 0x00ffff) >> 0));
SED1356_REG_LCD_DISP_START_HI = H2SED(((sed_fb_offset & 0x070000) >> 16));
}
}
/* sed_scroll()
*
* Because we are most likely running out of FLASH and probably also with
* cache disabled, a brute force memcpy of the whole screen would be very
* slow, even with reduced color depths. Instead, we define a frame buffer
* that is twice the size of our actual display. This does limit us to a
* 1Mbyte active display size, but 640 x 480 @ 16-bits/pixel = 614K so it
* works just fine. 800 x 600 can be had by reducing the color depth to
* 8-bits/pixel and using the look up tables.
*
* With the double buffering, we always write to the first buffer, even
* when the second buffer is active. This allows us to scroll by adjusting
* the starting and ending addresses in the SED135x by one row. When we
* reach the end of our virtual buffer, we reset the starting and ending
* addresses to the first buffer. Note that we can not adjust the SED135x
* registers until it is in vertical retrace. That means we have to wait
* until it is in active display, then goes to non-display, unless the
* screen is blanked, in which case we can update immediately.
*/
void sed_scroll(void)
{
sed_row++;
/* clear the new row(s) */
sed_clr_row(sed_row);
if (sed_row > (ROWS_PER_SCREEN - 1)) {
sed_clr_row(sed_row - ROWS_PER_SCREEN);
}
/* when sed_y_pos is greater than ROWS_PER_SCREEN we just adjust the
* start and end addresses in the SED135x. If it is equal to 2 *
* ROWS_PER_SCREEN, we reset the start and end addresses to SED_MEM_BASE.
*/
if (sed_row > (ROWS_PER_SCREEN - 1)) {
if (sed_row > ((ROWS_PER_SCREEN * 2) - 1)) {
sed_fb_offset = 0x00;
sed_row = 0;
sed_clearscreen();
} else {
/* calculate the new offset address of the frame buffer in words */
sed_fb_offset += (SED_GET_ADD(1, 0, sed_color_depth) / 2);
}
sed_update_fb_offset();
} /* if (sed_row > (ROWS_PER_SCREEN - 1)) */
}
void sed_putstring(char *s)
{
char *p = s;
while (*p)
sed_putchar(*p++);
}
void sed_clearscreen(void)
{
int i;
uint16_t wr16;
int bg = sed_bg_color;
int fbsize = sed_frame_buffer_size();
/* we double buffer so clear ALL of memory */
fbsize *= 2;
/* fill the frame buffer with incrementing color values */
switch (sed_color_depth){
case 4: wr16 = bg | bg << 4 | bg << 8 | bg << 12; break;
case 8: wr16 = bg | bg << 8; break;
/* 16-bits bypasses the lookup table */
default: wr16 = vga_lookup[bg]; break;
}
for (i = 0; i < fbsize; i += 2){
sed_write_frame_buffer(i, wr16);
}
}
