lcd.c

DESCRIPTION =========== This example project shows how to use the IAR Embedded Workbench for ARM

/*
 * Common LCD routines for supported CPUs
 *
 * (C) Copyright 2001-2002
 * Wolfgang Denk, DENX Software Engineering -- [e-mail]
 *
 * 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
 */

/************************************************************************/
/* ** HEADER FILES														*/
/************************************************************************/
#include <string.h>
#include <stdio.h>
#include "AT91SAM9261_init.h"
#include "main.h"
#include "com.h"

#include "lcd.h"
extern unsigned char Atmel_Bmp[];
#ifdef CONFIG_LCD
char message[AT91C_CB_SIZE];

#define __inline inline
/************************************************************************/
/* ** FONT DATA															*/
/************************************************************************/
#include "video_font.h"		/* Get font data, width and height	*/


ulong lcd_setmem (ulong addr);

static void lcd_drawchars (ushort x, ushort y, uchar *str, int count);
static __inline void lcd_putc_xy (ushort x, ushort y, uchar  c);

static int lcd_init (void *lcdbase);

extern void lcd_ctrl_init (void *lcdbase);
extern void lcd_enable (void);
static void *lcd_logo (void);


#if LCD_BPP == LCD_COLOR8
#ifdef CONFIG_AT91SAM9261
extern void lcd_setcolreg (void);
#else
extern void lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue);
#endif
#endif
#if LCD_BPP == LCD_MONOCHROME
extern void lcd_initcolregs (void);
#endif

static int lcd_getbgcolor (void);
static void lcd_setfgcolor (int color);
static void lcd_setbgcolor (int color);

char lcd_is_enabled = 0;

/************************************************************************/

/*----------------------------------------------------------------------*/

static void console_scrollup (void)
{
#if 1
	/* Copy up rows ignoring the first one */
	memcpy (CONSOLE_ROW_FIRST, CONSOLE_ROW_SECOND, CONSOLE_SCROLL_SIZE);

	/* Clear the last one */
	memset (CONSOLE_ROW_LAST, COLOR_MASK(lcd_color_bg), CONSOLE_ROW_SIZE);
#else
	/*
	 * Poor attempt to optimize speed by moving "long"s.
	 * But the code is ugly, and not a bit faster :-(
	 */
	ulong *t = (ulong *)CONSOLE_ROW_FIRST;
	ulong *s = (ulong *)CONSOLE_ROW_SECOND;
	ulong    l = CONSOLE_SCROLL_SIZE / sizeof(ulong);
	uchar  c = lcd_color_bg & 0xFF;
	ulong val= (c<<24) | (c<<16) | (c<<8) | c;

	while (l--)
		*t++ = *s++;

	t = (ulong *)CONSOLE_ROW_LAST;
	l = CONSOLE_ROW_SIZE / sizeof(ulong);

	while (l-- > 0)
		*t++ = val;
#endif
}

/*----------------------------------------------------------------------*/

static __inline void console_back (void)
{
	if (--console_col < 0) {
		console_col = CONSOLE_COLS-1 ;
		if (--console_row < 0) {
			console_row = 0;
		}
	}

	lcd_putc_xy (console_col * VIDEO_FONT_WIDTH,
		     console_row * VIDEO_FONT_HEIGHT,
		     ' ');
}

/*----------------------------------------------------------------------*/

static __inline void console_newline (void)
{
	++console_row;
	console_col = 0;

	/* Check if we need to scroll the terminal */
	if (console_row >= CONSOLE_ROWS) {
		/* Scroll everything up */
		console_scrollup () ;
		--console_row;
	}
}

/*----------------------------------------------------------------------*/

void lcd_putc (const char c)
{
	if (!lcd_is_enabled) {
		sprintf(message, "%d\n\r", c);
		AT91F_DBGU_Printk(message);
//		serial_putc(c);
		return;
	}

	switch (c) {
	case '\r':	console_col = 0;
			return;

	case '\n':	console_newline();
			return;

	case '\t':	/* Tab (8 chars alignment) */
			console_col |=  8;
			console_col &= ~7;

			if (console_col >= CONSOLE_COLS) {
				console_newline();
			}
			return;

	case '\b':	console_back();
			return;

	default:	lcd_putc_xy (console_col * VIDEO_FONT_WIDTH,
				     console_row * VIDEO_FONT_HEIGHT,
				     c);
			if (++console_col >= CONSOLE_COLS) {
				console_newline();
			}
			return;
	}
	/* NOTREACHED */
}

/*----------------------------------------------------------------------*/

void lcd_puts (const char *s)
{
	if (!lcd_is_enabled) {
		AT91F_DBGU_Printk((char *)s);
//		serial_puts (s);
		return;
	}

	while (*s) {
		lcd_putc (*s++);
	}
}

/************************************************************************/
/* ** Low-Level Graphics Routines					*/
/************************************************************************/

static void lcd_drawchars (ushort x, ushort y, uchar *str, int count)
{
	uchar *dest;
	volatile ushort off;
  ushort row;

	dest = (uchar *)(lcd_base + y * lcd_line_length + x * (1 << LCD_BPP) / 8);
	off  = x * (1 << LCD_BPP) % 8;

	for (row=0;  row < VIDEO_FONT_HEIGHT;  ++row, dest += lcd_line_length)  {
		uchar *s = str;
		uchar *d = dest;
		int i;

#if LCD_BPP == LCD_MONOCHROME
		uchar rest = *d & -(1 << (8-off));
		uchar sym;
#endif
		for (i=0; i<count; ++i) {
			uchar c, bits;

			c = *s++;
			bits = video_fontdata[c * VIDEO_FONT_HEIGHT + row];

#if LCD_BPP == LCD_MONOCHROME
			sym  = (COLOR_MASK(lcd_color_fg) & bits) |
			       (COLOR_MASK(lcd_color_bg) & ~bits);

			*d++ = rest | (sym >> off);
			rest = sym << (8-off);
#elif LCD_BPP == LCD_COLOR8
			for (c=0; c<8; ++c) {
				*d++ = (bits & 0x80) ?
						lcd_color_fg : lcd_color_bg;
				bits <<= 1;
			}
#elif LCD_BPP == LCD_COLOR16
			for (c=0; c<16; ++c) {
				*d++ = (bits & 0x80) ?
						lcd_color_fg : lcd_color_bg;
				bits <<= 1;
			}
#endif
		}
#if LCD_BPP == LCD_MONOCHROME
		*d  = rest | (*d & ((1 << (8-off)) - 1));
#endif
	}
}

/*----------------------------------------------------------------------*/

static __inline void lcd_putc_xy (ushort x, ushort y, uchar c)
{
#if defined(CONFIG_LCD_LOGO) && !defined(LCD_INFO_BELOW_LOGO)
	lcd_drawchars (x, y+BMP_LOGO_HEIGHT, &c, 1);
#else
	lcd_drawchars (x, y, &c, 1);
#endif
}

/************************************************************************/
/**  Small utility to check that you got the colours right		*/
/************************************************************************/
#ifdef LCD_TEST_PATTERN

#define	N_BLK_VERT	2
#define	N_BLK_HOR	3


static int test_colors[N_BLK_HOR*N_BLK_VERT] = {
	CONSOLE_COLOR_RED,	CONSOLE_COLOR_GREEN,	CONSOLE_COLOR_YELLOW,
	CONSOLE_COLOR_BLUE,	CONSOLE_COLOR_MAGENTA,	CONSOLE_COLOR_CYAN,
};


static void test_pattern (void)
{
	ushort v_max  = panel_info.vl_row;
	ushort h_max  = panel_info.vl_col;
	ushort v_step = (v_max + N_BLK_VERT - 1) / N_BLK_VERT;
	ushort h_step = (h_max + N_BLK_HOR  - 1) / N_BLK_HOR;
	ushort v, h;
	uchar *pix = (uchar *)lcd_base;

	printf ("[LCD] Test Pattern: %d x %d [%d x %d]\n",
		h_max, v_max, h_step, v_step);

	/* WARNING: Code silently assumes 8bit/pixel */
	for (v=0; v<v_max; ++v) {
		uchar iy = v / v_step;
		for (h=0; h<h_max; ++h) {
			uchar ix = N_BLK_HOR * iy + (h/h_step);
			*pix++ = test_colors[ix];
		}
	}
}
#endif /* LCD_TEST_PATTERN */


void set_background_color (int color) {}


/************************************************************************/
/* ** GENERIC Initialization Routines									*/
/************************************************************************/

int drv_lcd_init (void)
{
//	DECLARE_GLOBAL_DATA_PTR;
//	device_t lcddev;

	lcd_base = (void *)AT91C_FRAME_BUFFER;
	
	lcd_line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;

	lcd_init(lcd_base);		/* LCD initialization */

	return 0;
}


/*----------------------------------------------------------------------*/

static void lcd_print_logo (void)
{
#if LCD_BPP == LCD_MONOCHROME
	/* Setting the palette */
	lcd_initcolregs();

#elif LCD_BPP == LCD_COLOR8
	/* Setting the palette */
#ifndef CONFIG_AT91SAM9261
	lcd_setcolreg  (CONSOLE_COLOR_BLACK,       0,    0,    0);
	lcd_setcolreg  (CONSOLE_COLOR_RED,		0xFF,    0,    0);
	lcd_setcolreg  (CONSOLE_COLOR_GREEN,       0, 0xFF,    0);
	lcd_setcolreg  (CONSOLE_COLOR_YELLOW,	0xFF, 0xFF,    0);
	lcd_setcolreg  (CONSOLE_COLOR_BLUE,        0,    0, 0xFF);
	lcd_setcolreg  (CONSOLE_COLOR_MAGENTA,	0xFF,    0, 0xFF);
	lcd_setcolreg  (CONSOLE_COLOR_CYAN,	   	   0, 0xFF, 0xFF);
	lcd_setcolreg  (CONSOLE_COLOR_GREY,		0xAA, 0xAA, 0xAA);
	lcd_setcolreg  (CONSOLE_COLOR_WHITE,	0xFF, 0xFF, 0xFF);
#endif
#endif

#ifndef CFG_WHITE_ON_BLACK
	lcd_setfgcolor (CONSOLE_COLOR_BLACK);
	lcd_setbgcolor (CONSOLE_COLOR_WHITE);
#else
	lcd_setfgcolor (CONSOLE_COLOR_WHITE);
	lcd_setbgcolor (CONSOLE_COLOR_BLACK);
#endif	/* CFG_WHITE_ON_BLACK */

	memset ((char *)lcd_base,
		COLOR_MASK(lcd_getbgcolor()),
		lcd_line_length*panel_info.vl_row);

	lcd_console_address = lcd_logo ();

	console_col = 0;
	console_row = 0;
}

/*----------------------------------------------------------------------*/

static int lcd_init (void *lcdbase)
{
	/* Initialize the lcd controller */
//	debug ("[LCD] Initializing LCD frambuffer at %p\n", lcdbase);

	lcd_ctrl_init (lcdbase);
	lcd_print_logo();
	lcd_enable ();

	/* Initialize the console */
	console_col = 0;
#ifdef LCD_INFO_BELOW_LOGO
	console_row = 7 + BMP_LOGO_HEIGHT / VIDEO_FONT_HEIGHT;
#else
	console_row = 1;	/* leave 1 blank line below logo */
#endif
	lcd_is_enabled = 1;

	return 0;
}


/************************************************************************/
/* ** ROM capable initialization part - needed to reserve FB memory	*/
/************************************************************************/
/*
 * This is called early in the system initialization to grab memory
 * for the LCD controller.
 * Returns new address for monitor, after reserving LCD buffer memory
 *
 * Note that this is running from ROM, so no write access to global data.
 */
ulong lcd_setmem (ulong addr)
{
	ulong size;
	int line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;

//	debug ("LCD panel info: %d x %d, %d bit/pix\n",
//		panel_info.vl_col, panel_info.vl_row, NBITS (panel_info.vl_bpix) );

	size = line_length * panel_info.vl_row;

	/* Round up to nearest full page */
	size = (size + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);

	/* Allocate pages for the frame buffer. */
	addr -= size;

//	debug ("Reserving %ldk for LCD Framebuffer at: %08lx\n", size>>10, addr);

	return (addr);
}

/*----------------------------------------------------------------------*/

static void lcd_setfgcolor (int color)
{
#ifdef CONFIG_AT91SAM9261
  lcd_color_fg = color;
#else
  lcd_color_fg = color & 0x0F;
#endif
}

/*----------------------------------------------------------------------*/

static void lcd_setbgcolor (int color)
{
#ifdef CONFIG_AT91SAM9261
  lcd_color_bg = color;
#else
  lcd_color_bg = color & 0x0F;
#endif
}

/*----------------------------------------------------------------------*/

static int lcd_getbgcolor (void)
{
	return lcd_color_bg;
}

/*----------------------------------------------------------------------*/
void lcd_clearscreen (void)
{
	// Clear Screen
	memset ((char *)lcd_base,
			COLOR_MASK(lcd_getbgcolor()),
			lcd_line_length*panel_info.vl_row);
}

/************************************************************************/
/* ** Chipset depending Bitmap / Logo stuff...                          */
/************************************************************************/
#ifdef CONFIG_LCD_LOGO
void bitmap_plot (int x, int y)
{
uint *cmap;
ushort i, j;
uchar *bmap;
uchar *fb;
ushort *fb16;

	bmap = &bmp_logo_bitmap[0];

	fb   = (uchar *)(lcd_base + y * lcd_line_length + x);

	if (NBITS(panel_info.vl_bpix) < 12) {
		/* Leave room for default color map */
		cmap = (uint *) panel_info.controller.lcdc->LCDC_LUT_ENTRY;

		/* Set color map */
		for (i=0; i<(sizeof(bmp_logo_palette)/(sizeof(ulong))); ++i) {
			ulong colreg = bmp_logo_palette[i];
			ushort lcdc_lut_entry;
#ifdef  CFG_INVERT_COLORS
			*cmap++ = 0xffff - colreg;
#else	
#ifdef CONFIG_AT91SAM9261
			lcdc_lut_entry =  ((colreg & 0xFC0000) >>  8);   /* get the blue color   */
			lcdc_lut_entry |= ((colreg & 0x00FC00) >>  6);   /* get the green color  */
			lcdc_lut_entry |= ((colreg & 0x0000FC) >>  2);   /* get the red color    */

			*(cmap /*+ BMP_LOGO_OFFSET*/) = lcdc_lut_entry;
			cmap++;
#else
			*cmap++ = colreg;
#endif
#endif
		}

		for (i=0; i<BMP_LOGO_HEIGHT; ++i) {
			memcpy (fb, bmap, BMP_LOGO_WIDTH);
			bmap += BMP_LOGO_WIDTH;
			fb   += panel_info.vl_col;
		}
	}
	else { /* true color mode */
		fb16 = (ushort *)(lcd_base + y * lcd_line_length + x);
		for (i=0; i<BMP_LOGO_HEIGHT; ++i) {
			for (j=0; j<BMP_LOGO_WIDTH; j++) {
				fb16[j] = bmp_logo_palette[(bmap[j])];
				}
			bmap += BMP_LOGO_WIDTH;
			fb16 += panel_info.vl_col;
		}
	}
}
#endif /* CONFIG_LCD_LOGO */

static void *lcd_logo (void)
{

#ifdef LCD_INFO
	char info[80];
#endif /* LCD_INFO */

#ifdef CONFIG_LCD_LOGO
	bitmap_plot (0, 0);
#endif /* CONFIG_LCD_LOGO */

#ifdef CONFIG_AT91SAM9261
#ifdef LCD_INFO

	sprintf (info, "IAR Embedded Workbench for ARM");
	lcd_drawchars (LCD_INFO_X, LCD_INFO_Y + VIDEO_FONT_HEIGHT,
					(uchar *)info, strlen(info));

#ifdef LCD_INFO_BELOW_LOGO
  unsigned long CpuFreq = AT91F_PMC_GetProcessorClock(AT91C_BASE_PMC,AT91C_BASE_CKGR,SLOWCLOCK);
	sprintf (info, "AT91SAM9261 CPU at %0.2f MHz", ((float)CpuFreq/1000000.0));
	lcd_drawchars (LCD_INFO_X, LCD_INFO_Y + VIDEO_FONT_HEIGHT * 3,
					(uchar *)info, strlen(info));
	sprintf (info, "%ld MB SDRAM,%ld MB NandFlash",
		64,
		256);
	lcd_drawchars (LCD_INFO_X, LCD_INFO_Y + VIDEO_FONT_HEIGHT * 4,
					(uchar *)info, strlen(info));
#else
	// leave one blank line

	sprintf (info, "AT91SAM9261 CPU at %s MHz, %ld MB SDRAM, %ld MB NandFlash",
		"200",
		64,
		256);
	lcd_drawchars (LCD_INFO_X, LCD_INFO_Y + VIDEO_FONT_HEIGHT * 4,
					info, strlen(info));

#endif
#endif
#endif


#if defined(CONFIG_LCD_LOGO) && !defined(LCD_INFO_BELOW_LOGO)
	return ((void *)((ulong)lcd_base + BMP_LOGO_HEIGHT * lcd_line_length));
#else
	return ((void *)lcd_base);
#endif /* CONFIG_LCD_LOGO */
}

/************************************************************************/
/************************************************************************/

void AT91F_DisplayLCD (char *str, ushort x, ushort y)
{
	lcd_drawchars (x, y, (uchar *)str, strlen(str));
}


#endif /* CONFIG_LCD */