lcd.c

/*
 * Common LCD routines for supported CPUs
 *
 * (C) Copyright 2001-2002
 * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/************************************************************************/
/* ** HEADER FILES							*/
/************************************************************************/

/* #define DEBUG */

#include <config.h>
#include <common.h>
#include <command.h>
#include <stdarg.h>
#include <search.h>
#include <env_callback.h>
#include <linux/types.h>
#include <stdio_dev.h>
#if defined(CONFIG_POST)
#include <post.h>
#endif
#include <lcd.h>
#include <watchdog.h>

#include <splash.h>

#if defined(CONFIG_CPU_PXA25X) || defined(CONFIG_CPU_PXA27X) || \
	defined(CONFIG_CPU_MONAHANS)
#define CONFIG_CPU_PXA
#include <asm/byteorder.h>
#endif

#if defined(CONFIG_MPC823)
#include <lcdvideo.h>
#endif

#if defined(CONFIG_ATMEL_LCD)
#include <atmel_lcdc.h>
#endif

#if defined(CONFIG_LCD_DT_SIMPLEFB)
#include <libfdt.h>
#endif

/************************************************************************/
/* ** FONT DATA								*/
/************************************************************************/
#include <video_font.h>		/* Get font data, width and height	*/

/************************************************************************/
/* ** LOGO DATA								*/
/************************************************************************/
#ifdef CONFIG_LCD_LOGO
# include <bmp_logo.h>		/* Get logo data, width and height	*/
# include <bmp_logo_data.h>
# if (CONSOLE_COLOR_WHITE >= BMP_LOGO_OFFSET) && (LCD_BPP != LCD_COLOR16)
#  error Default Color Map overlaps with Logo Color Map
# endif
#endif

#ifndef CONFIG_LCD_ALIGNMENT
#define CONFIG_LCD_ALIGNMENT PAGE_SIZE
#endif

/* By default we scroll by a single line */
#ifndef CONFIG_CONSOLE_SCROLL_LINES
#define CONFIG_CONSOLE_SCROLL_LINES 1
#endif

/************************************************************************/
/* ** CONSOLE DEFINITIONS & FUNCTIONS					*/
/************************************************************************/
#if defined(CONFIG_LCD_LOGO) && !defined(CONFIG_LCD_INFO_BELOW_LOGO)
# define CONSOLE_ROWS		((panel_info.vl_row-BMP_LOGO_HEIGHT) \
					/ VIDEO_FONT_HEIGHT)
#else
# define CONSOLE_ROWS		(panel_info.vl_row / VIDEO_FONT_HEIGHT)
#endif

#define CONSOLE_COLS		(panel_info.vl_col / VIDEO_FONT_WIDTH)
#define CONSOLE_ROW_SIZE	(VIDEO_FONT_HEIGHT * lcd_line_length)
#define CONSOLE_ROW_FIRST	lcd_console_address
#define CONSOLE_ROW_SECOND	(lcd_console_address + CONSOLE_ROW_SIZE)
#define CONSOLE_ROW_LAST	(lcd_console_address + CONSOLE_SIZE \
					- CONSOLE_ROW_SIZE)
#define CONSOLE_SIZE		(CONSOLE_ROW_SIZE * CONSOLE_ROWS)
#define CONSOLE_SCROLL_SIZE	(CONSOLE_SIZE - CONSOLE_ROW_SIZE)

#if LCD_BPP == LCD_MONOCHROME
# define COLOR_MASK(c)		((c)	  | (c) << 1 | (c) << 2 | (c) << 3 | \
				 (c) << 4 | (c) << 5 | (c) << 6 | (c) << 7)
#elif (LCD_BPP == LCD_COLOR8) || (LCD_BPP == LCD_COLOR16)
# define COLOR_MASK(c)		(c)
#else
# error Unsupported LCD BPP.
#endif

DECLARE_GLOBAL_DATA_PTR;

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

static int lcd_init(void *lcdbase);

static void *lcd_logo(void);

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

static int lcd_color_fg;
static int lcd_color_bg;
int lcd_line_length;

char lcd_is_enabled = 0;

static short console_col;
static short console_row;

static void *lcd_console_address;
static void *lcd_base;			/* Start of framebuffer memory	*/

static char lcd_flush_dcache;	/* 1 to flush dcache after each lcd update */

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

/* Flush LCD activity to the caches */
void lcd_sync(void)
{
	/*
	 * flush_dcache_range() is declared in common.h but it seems that some
	 * architectures do not actually implement it. Is there a way to find
	 * out whether it exists? For now, ARM is safe.
	 */
#if defined(CONFIG_ARM) && !defined(CONFIG_SYS_DCACHE_OFF)
	int line_length;

	if (lcd_flush_dcache)
		flush_dcache_range((u32)lcd_base,
			(u32)(lcd_base + lcd_get_size(&line_length)));
#endif
}

void lcd_set_flush_dcache(int flush)
{
	lcd_flush_dcache = (flush != 0);
}

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

static void console_scrollup(void)
{
	const int rows = CONFIG_CONSOLE_SCROLL_LINES;

	/* Copy up rows ignoring those that will be overwritten */
	memcpy(CONSOLE_ROW_FIRST,
	       lcd_console_address + CONSOLE_ROW_SIZE * rows,
	       CONSOLE_SIZE - CONSOLE_ROW_SIZE * rows);

	/* Clear the last rows */
	memset(lcd_console_address + CONSOLE_SIZE - CONSOLE_ROW_SIZE * rows,
		COLOR_MASK(lcd_color_bg),
		CONSOLE_ROW_SIZE * rows);

	lcd_sync();
	console_row -= rows;
}

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

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_col = 0;

	/* Check if we need to scroll the terminal */
	if (++console_row >= CONSOLE_ROWS)
		console_scrollup();
	else
		lcd_sync();
}