/*
   * 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 <asm/unaligned.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();

  }
  
  /*----------------------------------------------------------------------*/

  void lcd_putc(const char c)

  {
  	if (!lcd_is_enabled) {
  		serial_putc(c);

  		return;
  	}
  
  	switch (c) {

  	case '\r':
  		console_col = 0;

  		return;
  	case '
  ':
  		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();

  	}

  }
  
  /*----------------------------------------------------------------------*/

  void lcd_puts(const char *s)

  {
  	if (!lcd_is_enabled) {

  		serial_puts(s);

  		return;
  	}

  	while (*s)

  		lcd_putc(*s++);

  	lcd_sync();

  }

  /*----------------------------------------------------------------------*/
  
  void lcd_printf(const char *fmt, ...)
  {
  	va_list args;
  	char buf[CONFIG_SYS_PBSIZE];
  
  	va_start(args, fmt);
  	vsprintf(buf, fmt, args);
  	va_end(args);
  
  	lcd_puts(buf);
  }

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

  static void lcd_drawchars(ushort x, ushort y, uchar *str, int count)

  {
  	uchar *dest;

  	ushort row;

  #if defined(CONFIG_LCD_LOGO) && !defined(CONFIG_LCD_INFO_BELOW_LOGO)
  	y += BMP_LOGO_HEIGHT;
  #endif

  #if LCD_BPP == LCD_MONOCHROME
  	ushort off  = x * (1 << LCD_BPP) % 8;
  #endif

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

  	for (row = 0; row < VIDEO_FONT_HEIGHT; ++row, dest += lcd_line_length) {

  		uchar *s = str;

  		int i;

  #if LCD_BPP == LCD_COLOR16
  		ushort *d = (ushort *)dest;
  #else
  		uchar *d = dest;
  #endif

  
  #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 < 8; ++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_puts_xy(ushort x, ushort y, uchar *s)

  {

  	lcd_drawchars(x, y, s, strlen((char *)s));

  }
  
  /*----------------------------------------------------------------------*/

  static inline void lcd_putc_xy(ushort x, ushort y, uchar c)

  {

  	lcd_drawchars(x, y, &c, 1);

  }
  
  /************************************************************************/
  /**  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]
  ",

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

  /*
   * With most lcd drivers the line length is set up
   * by calculating it from panel_info parameters. Some
   * drivers need to calculate the line length differently,
   * so make the function weak to allow overriding it.
   */
  __weak int lcd_get_size(int *line_length)

  {
  	*line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
  	return *line_length * panel_info.vl_row;
  }

  int drv_lcd_init(void)

  {

  	struct stdio_dev lcddev;

  	int rc;

  	lcd_base = (void *) gd->fb_base;

  	lcd_init(lcd_base);		/* LCD initialization */

  
  	/* Device initialization */

  	memset(&lcddev, 0, sizeof(lcddev));

  	strcpy(lcddev.name, "lcd");

  	lcddev.ext   = 0;			/* No extensions */
  	lcddev.flags = DEV_FLAGS_OUTPUT;	/* Output only */
  	lcddev.putc  = lcd_putc;		/* 'putc' function */
  	lcddev.puts  = lcd_puts;		/* 'puts' function */

  	rc = stdio_register(&lcddev);

  
  	return (rc == 0) ? 1 : rc;
  }
  
  /*----------------------------------------------------------------------*/

  void lcd_clear(void)

  {
  #if LCD_BPP == LCD_MONOCHROME
  	/* Setting the palette */
  	lcd_initcolregs();
  
  #elif LCD_BPP == LCD_COLOR8
  	/* Setting the palette */

  	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

  #ifndef CONFIG_SYS_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	/* CONFIG_SYS_WHITE_ON_BLACK */

  
  #ifdef	LCD_TEST_PATTERN
  	test_pattern();
  #else
  	/* set framebuffer to background color */

  	memset((char *)lcd_base,

  		COLOR_MASK(lcd_getbgcolor()),

  		lcd_line_length * panel_info.vl_row);

  #endif
  	/* Paint the logo and retrieve LCD base address */

  	debug("[LCD] Drawing the logo...
  ");

  	lcd_console_address = lcd_logo();

  
  	console_col = 0;
  	console_row = 0;

  	lcd_sync();
  }
  
  static int do_lcd_clear(cmd_tbl_t *cmdtp, int flag, int argc,
  			char *const argv[])
  {
  	lcd_clear();
  	return 0;

  }
  
  U_BOOT_CMD(

  	cls,	1,	1,	do_lcd_clear,

  	"clear screen",

  	""

  );
  
  /*----------------------------------------------------------------------*/

  static int lcd_init(void *lcdbase)

  {
  	/* Initialize the lcd controller */

  	debug("[LCD] Initializing LCD frambuffer at %p
  ", lcdbase);

  	lcd_ctrl_init(lcdbase);

  
  	/*
  	 * lcd_ctrl_init() of some drivers (i.e. bcm2835 on rpi_b) ignores
  	 * the 'lcdbase' argument and uses custom lcd base address
  	 * by setting up gd->fb_base. Check for this condition and fixup
  	 * 'lcd_base' address.
  	 */
  	if ((unsigned long)lcdbase != gd->fb_base)
  		lcd_base = (void *)gd->fb_base;
  
  	debug("[LCD] Using LCD frambuffer at %p
  ", lcd_base);

  	lcd_get_size(&lcd_line_length);

  	lcd_is_enabled = 1;

  	lcd_clear();

  	lcd_enable();

  
  	/* Initialize the console */
  	console_col = 0;

  #ifdef CONFIG_LCD_INFO_BELOW_LOGO

  	console_row = 7 + BMP_LOGO_HEIGHT / VIDEO_FONT_HEIGHT;
  #else
  	console_row = 1;	/* leave 1 blank line below logo */
  #endif

  
  	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;

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

  	size = lcd_get_size(&line_length);

  	/* Round up to nearest full page, or MMU section if defined */
  	size = ALIGN(size, CONFIG_LCD_ALIGNMENT);
  	addr = ALIGN(addr - CONFIG_LCD_ALIGNMENT + 1, CONFIG_LCD_ALIGNMENT);

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

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

  	return addr;

  }
  
  /*----------------------------------------------------------------------*/

  static void lcd_setfgcolor(int color)

  {

  	lcd_color_fg = color;

  }
  
  /*----------------------------------------------------------------------*/

  static void lcd_setbgcolor(int color)

  {

  	lcd_color_bg = color;

  }
  
  /*----------------------------------------------------------------------*/

  int lcd_getfgcolor(void)

  {
  	return lcd_color_fg;
  }

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

  static int lcd_getbgcolor(void)

  {
  	return lcd_color_bg;
  }

  /************************************************************************/
  /* ** Chipset depending Bitmap / Logo stuff...                          */
  /************************************************************************/

  static inline ushort *configuration_get_cmap(void)
  {
  #if defined CONFIG_CPU_PXA
  	struct pxafb_info *fbi = &panel_info.pxa;
  	return (ushort *)fbi->palette;
  #elif defined(CONFIG_MPC823)
  	immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
  	cpm8xx_t *cp = &(immr->im_cpm);
  	return (ushort *)&(cp->lcd_cmap[255 * sizeof(ushort)]);
  #elif defined(CONFIG_ATMEL_LCD)
  	return (ushort *)(panel_info.mmio + ATMEL_LCDC_LUT(0));

  #elif !defined(CONFIG_ATMEL_HLCD) && !defined(CONFIG_EXYNOS_FB)
  	return panel_info.cmap;

  #elif defined(CONFIG_LCD_LOGO)

  	return bmp_logo_palette;
  #else
  	return NULL;
  #endif

  }

  #ifdef CONFIG_LCD_LOGO

  void bitmap_plot(int x, int y)

  {

  #ifdef CONFIG_ATMEL_LCD

  	uint *cmap = (uint *)bmp_logo_palette;

  #else

  	ushort *cmap = (ushort *)bmp_logo_palette;

  #endif

  	ushort i, j;
  	uchar *bmap;
  	uchar *fb;
  	ushort *fb16;

  #if defined(CONFIG_MPC823)
  	immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
  	cpm8xx_t *cp = &(immr->im_cpm);

  #endif

  	unsigned bpix = NBITS(panel_info.vl_bpix);

  	debug("Logo: width %d  height %d  colors %d  cmap %d
  ",

  		BMP_LOGO_WIDTH, BMP_LOGO_HEIGHT, BMP_LOGO_COLORS,

  		ARRAY_SIZE(bmp_logo_palette));

  
  	bmap = &bmp_logo_bitmap[0];

  	fb   = (uchar *)(lcd_base + y * lcd_line_length + x * bpix / 8);

  	if (bpix < 12) {

  		/* Leave room for default color map
  		 * default case: generic system with no cmap (most likely 16bpp)
  		 * cmap was set to the source palette, so no change is done.
  		 * This avoids even more ifdefs in the next stanza
  		 */
  #if defined(CONFIG_MPC823)

  		cmap = (ushort *) &(cp->lcd_cmap[BMP_LOGO_OFFSET * sizeof(ushort)]);

  #elif defined(CONFIG_ATMEL_LCD)

  		cmap = (uint *)configuration_get_cmap();

  #else

  		cmap = configuration_get_cmap();

  #endif
  
  		WATCHDOG_RESET();
  
  		/* Set color map */

  		for (i = 0; i < ARRAY_SIZE(bmp_logo_palette); ++i) {

  			ushort colreg = bmp_logo_palette[i];

  #ifdef CONFIG_ATMEL_LCD
  			uint lut_entry;
  #ifdef CONFIG_ATMEL_LCD_BGR555
  			lut_entry = ((colreg & 0x000F) << 11) |

  					((colreg & 0x00F0) <<  2) |
  					((colreg & 0x0F00) >>  7);

  #else /* CONFIG_ATMEL_LCD_RGB565 */
  			lut_entry = ((colreg & 0x000F) << 1) |

  					((colreg & 0x00F0) << 3) |
  					((colreg & 0x0F00) << 4);

  #endif
  			*(cmap + BMP_LOGO_OFFSET) = lut_entry;
  			cmap++;
  #else /* !CONFIG_ATMEL_LCD */

  #ifdef  CONFIG_SYS_INVERT_COLORS

  			*cmap++ = 0xffff - colreg;
  #else
  			*cmap++ = colreg;
  #endif

  #endif /* CONFIG_ATMEL_LCD */

  		}
  
  		WATCHDOG_RESET();

  		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 */

  		u16 col16;

  		fb16 = (ushort *)fb;

  		for (i = 0; i < BMP_LOGO_HEIGHT; ++i) {
  			for (j = 0; j < BMP_LOGO_WIDTH; j++) {

  				col16 = bmp_logo_palette[(bmap[j]-16)];
  				fb16[j] =
  					((col16 & 0x000F) << 1) |
  					((col16 & 0x00F0) << 3) |
  					((col16 & 0x0F00) << 4);

  				}
  			bmap += BMP_LOGO_WIDTH;
  			fb16 += panel_info.vl_col;
  		}
  	}
  
  	WATCHDOG_RESET();

  	lcd_sync();

  }

  #else
  static inline void bitmap_plot(int x, int y) {}

  #endif /* CONFIG_LCD_LOGO */
  
  /*----------------------------------------------------------------------*/

  #if defined(CONFIG_CMD_BMP) || defined(CONFIG_SPLASH_SCREEN)

  /*
   * Display the BMP file located at address bmp_image.
   * Only uncompressed.
   */

  
  #ifdef CONFIG_SPLASH_SCREEN_ALIGN
  #define BMP_ALIGN_CENTER	0x7FFF

  
  static void splash_align_axis(int *axis, unsigned long panel_size,
  					unsigned long picture_size)
  {
  	unsigned long panel_picture_delta = panel_size - picture_size;
  	unsigned long axis_alignment;
  
  	if (*axis == BMP_ALIGN_CENTER)
  		axis_alignment = panel_picture_delta / 2;
  	else if (*axis < 0)
  		axis_alignment = panel_picture_delta + *axis + 1;
  	else
  		return;
  
  	*axis = max(0, axis_alignment);
  }

  #endif

  
  #ifdef CONFIG_LCD_BMP_RLE8
  
  #define BMP_RLE8_ESCAPE		0
  #define BMP_RLE8_EOL		0
  #define BMP_RLE8_EOBMP		1
  #define BMP_RLE8_DELTA		2
  
  static void draw_unencoded_bitmap(ushort **fbp, uchar *bmap, ushort *cmap,
  				  int cnt)
  {
  	while (cnt > 0) {
  		*(*fbp)++ = cmap[*bmap++];
  		cnt--;
  	}
  }
  
  static void draw_encoded_bitmap(ushort **fbp, ushort c, int cnt)
  {
  	ushort *fb = *fbp;
  	int cnt_8copy = cnt >> 3;
  
  	cnt -= cnt_8copy << 3;
  	while (cnt_8copy > 0) {
  		*fb++ = c;
  		*fb++ = c;
  		*fb++ = c;
  		*fb++ = c;
  		*fb++ = c;
  		*fb++ = c;
  		*fb++ = c;
  		*fb++ = c;
  		cnt_8copy--;
  	}
  	while (cnt > 0) {
  		*fb++ = c;
  		cnt--;
  	}

  	*fbp = fb;

  }
  
  /*

   * Do not call this function directly, must be called from lcd_display_bitmap.

   */
  static void lcd_display_rle8_bitmap(bmp_image_t *bmp, ushort *cmap, uchar *fb,
  				    int x_off, int y_off)
  {
  	uchar *bmap;
  	ulong width, height;
  	ulong cnt, runlen;
  	int x, y;
  	int decode = 1;

  	width = get_unaligned_le32(&bmp->header.width);
  	height = get_unaligned_le32(&bmp->header.height);
  	bmap = (uchar *)bmp + get_unaligned_le32(&bmp->header.data_offset);

  
  	x = 0;
  	y = height - 1;
  
  	while (decode) {
  		if (bmap[0] == BMP_RLE8_ESCAPE) {
  			switch (bmap[1]) {
  			case BMP_RLE8_EOL:
  				/* end of line */
  				bmap += 2;
  				x = 0;
  				y--;
  				/* 16bpix, 2-byte per pixel, width should *2 */
  				fb -= (width * 2 + lcd_line_length);
  				break;
  			case BMP_RLE8_EOBMP:
  				/* end of bitmap */
  				decode = 0;
  				break;
  			case BMP_RLE8_DELTA:
  				/* delta run */
  				x += bmap[2];
  				y -= bmap[3];
  				/* 16bpix, 2-byte per pixel, x should *2 */
  				fb = (uchar *) (lcd_base + (y + y_off - 1)
  					* lcd_line_length + (x + x_off) * 2);
  				bmap += 4;
  				break;
  			default:
  				/* unencoded run */
  				runlen = bmap[1];
  				bmap += 2;
  				if (y < height) {
  					if (x < width) {
  						if (x + runlen > width)
  							cnt = width - x;
  						else
  							cnt = runlen;
  						draw_unencoded_bitmap(
  							(ushort **)&fb,
  							bmap, cmap, cnt);
  					}
  					x += runlen;
  				}
  				bmap += runlen;
  				if (runlen & 1)
  					bmap++;
  			}
  		} else {
  			/* encoded run */
  			if (y < height) {
  				runlen = bmap[0];
  				if (x < width) {
  					/* aggregate the same code */
  					while (bmap[0] == 0xff &&
  					       bmap[2] != BMP_RLE8_ESCAPE &&
  					       bmap[1] == bmap[3]) {
  						runlen += bmap[2];
  						bmap += 2;
  					}
  					if (x + runlen > width)
  						cnt = width - x;
  					else
  						cnt = runlen;
  					draw_encoded_bitmap((ushort **)&fb,
  						cmap[bmap[1]], cnt);
  				}
  				x += runlen;
  			}
  			bmap += 2;
  		}
  	}
  }
  #endif

  #if defined(CONFIG_MPC823) || defined(CONFIG_MCC200)

  #define FB_PUT_BYTE(fb, from) *(fb)++ = (255 - *(from)++)

  #else
  #define FB_PUT_BYTE(fb, from) *(fb)++ = *(from)++

  #endif
  
  #if defined(CONFIG_BMP_16BPP)
  #if defined(CONFIG_ATMEL_LCD_BGR555)
  static inline void fb_put_word(uchar **fb, uchar **from)
  {
  	*(*fb)++ = (((*from)[0] & 0x1f) << 2) | ((*from)[1] & 0x03);
  	*(*fb)++ = ((*from)[0] & 0xe0) | (((*from)[1] & 0x7c) >> 2);
  	*from += 2;
  }
  #else
  static inline void fb_put_word(uchar **fb, uchar **from)
  {
  	*(*fb)++ = *(*from)++;
  	*(*fb)++ = *(*from)++;
  }
  #endif
  #endif /* CONFIG_BMP_16BPP */

  int lcd_display_bitmap(ulong bmp_image, int x, int y)
  {

  #if !defined(CONFIG_MCC200)
  	ushort *cmap = NULL;
  #endif
  	ushort *cmap_base = NULL;

  	ushort i, j;
  	uchar *fb;
  	bmp_image_t *bmp=(bmp_image_t *)bmp_image;
  	uchar *bmap;

  	ushort padded_width;

  	unsigned long width, height, byte_width;

  	unsigned long pwidth = panel_info.vl_col;

  	unsigned colors, bpix, bmp_bpix;

  	if (!bmp || !(bmp->header.signature[0] == 'B' &&
  		bmp->header.signature[1] == 'M')) {

  		printf("Error: no valid bmp image at %lx
  ", bmp_image);

  		return 1;

  	}

  	width = get_unaligned_le32(&bmp->header.width);
  	height = get_unaligned_le32(&bmp->header.height);
  	bmp_bpix = get_unaligned_le16(&bmp->header.bit_count);

  	colors = 1 << bmp_bpix;

  
  	bpix = NBITS(panel_info.vl_bpix);

  	if (bpix != 1 && bpix != 8 && bpix != 16 && bpix != 32) {

  		printf ("Error: %d bit/pixel mode, but BMP has %d bit/pixel
  ",
  			bpix, bmp_bpix);

  		return 1;
  	}

  	/* We support displaying 8bpp BMPs on 16bpp LCDs */

  	if (bpix != bmp_bpix && !(bmp_bpix == 8 && bpix == 16)) {

  		printf ("Error: %d bit/pixel mode, but BMP has %d bit/pixel
  ",

  			bpix, get_unaligned_le16(&bmp->header.bit_count));

  		return 1;
  	}

  	debug("Display-bmp: %d x %d  with %d colors
  ",

  		(int)width, (int)height, (int)colors);

  #if !defined(CONFIG_MCC200)
  	/* MCC200 LCD doesn't need CMAP, supports 1bpp b&w only */

  	if (bmp_bpix == 8) {

  		cmap = configuration_get_cmap();

  		cmap_base = cmap;

  		/* Set color map */

  		for (i = 0; i < colors; ++i) {

  			bmp_color_table_entry_t cte = bmp->color_table[i];

  #if !defined(CONFIG_ATMEL_LCD)

  			ushort colreg =
  				( ((cte.red)   << 8) & 0xf800) |

  				( ((cte.green) << 3) & 0x07e0) |
  				( ((cte.blue)  >> 3) & 0x001f) ;

  #ifdef CONFIG_SYS_INVERT_COLORS

  			*cmap = 0xffff - colreg;

  #else

  			*cmap = colreg;
  #endif

  #if defined(CONFIG_MPC823)

  			cmap--;

  #else
  			cmap++;

  #endif

  #else /* CONFIG_ATMEL_LCD */
  			lcd_setcolreg(i, cte.red, cte.green, cte.blue);
  #endif

  		}
  	}

  #endif

  	/*
  	 *  BMP format for Monochrome assumes that the state of a
  	 * pixel is described on a per Bit basis, not per Byte.
  	 *  So, in case of Monochrome BMP we should align widths
  	 * on a byte boundary and convert them from Bit to Byte
  	 * units.

  	 *  Probably, PXA250 and MPC823 process 1bpp BMP images in
  	 * their own ways, so make the converting to be MCC200

  	 * specific.
  	 */
  #if defined(CONFIG_MCC200)

  	if (bpix == 1) {

  		width = ((width + 7) & ~7) >> 3;
  		x     = ((x + 7) & ~7) >> 3;
  		pwidth= ((pwidth + 7) & ~7) >> 3;
  	}
  #endif

  	padded_width = (width & 0x3 ? (width & ~0x3) + 4 : width);

  
  #ifdef CONFIG_SPLASH_SCREEN_ALIGN

  	splash_align_axis(&x, pwidth, width);
  	splash_align_axis(&y, panel_info.vl_row, height);

  #endif /* CONFIG_SPLASH_SCREEN_ALIGN */

  	if ((x + width) > pwidth)

  		width = pwidth - x;

  	if ((y + height) > panel_info.vl_row)

  		height = panel_info.vl_row - y;

  	bmap = (uchar *)bmp + get_unaligned_le32(&bmp->header.data_offset);
  	fb   = (uchar *)(lcd_base +

  		(y + height - 1) * lcd_line_length + x * bpix / 8);

  	switch (bmp_bpix) {

  	case 1: /* pass through */
  	case 8:

  #ifdef CONFIG_LCD_BMP_RLE8

  		u32 compression = get_unaligned_le32(&bmp->header.compression);
  		if (compression == BMP_BI_RLE8) {

  			if (bpix != 16) {
  				/* TODO implement render code for bpix != 16 */
  				printf("Error: only support 16 bpix");
  				return 1;
  			}
  			lcd_display_rle8_bitmap(bmp, cmap_base, fb, x, y);
  			break;
  		}
  #endif

  		if (bpix != 16)
  			byte_width = width;
  		else
  			byte_width = width * 2;

  		for (i = 0; i < height; ++i) {
  			WATCHDOG_RESET();

  			for (j = 0; j < width; j++) {
  				if (bpix != 16) {

  					FB_PUT_BYTE(fb, bmap);

  				} else {
  					*(uint16_t *)fb = cmap_base[*(bmap++)];
  					fb += sizeof(uint16_t) / sizeof(*fb);
  				}
  			}

  			bmap += (padded_width - width);

  			fb -= byte_width + lcd_line_length;

  		}
  		break;
  
  #if defined(CONFIG_BMP_16BPP)
  	case 16:
  		for (i = 0; i < height; ++i) {
  			WATCHDOG_RESET();

  			for (j = 0; j < width; j++)
  				fb_put_word(&fb, &bmap);

  			bmap += (padded_width - width) * 2;

  			fb -= width * 2 + lcd_line_length;

  		}
  		break;
  #endif /* CONFIG_BMP_16BPP */

  #if defined(CONFIG_BMP_32BPP)
  	case 32:
  		for (i = 0; i < height; ++i) {
  			for (j = 0; j < width; j++) {
  				*(fb++) = *(bmap++);
  				*(fb++) = *(bmap++);
  				*(fb++) = *(bmap++);
  				*(fb++) = *(bmap++);
  			}

  			fb -= lcd_line_length + width * (bpix / 8);

  		}
  		break;
  #endif /* CONFIG_BMP_32BPP */

  	default:
  		break;
  	};

  	lcd_sync();

  	return 0;

  }

  #endif

  static void *lcd_logo(void)

  {

  #ifdef CONFIG_SPLASH_SCREEN
  	char *s;
  	ulong addr;
  	static int do_splash = 1;
  
  	if (do_splash && (s = getenv("splashimage")) != NULL) {

  		int x = 0, y = 0;

  		do_splash = 0;

  		if (splash_screen_prepare())

  			return (void *)lcd_base;

  		addr = simple_strtoul (s, NULL, 16);

  
  		splash_get_pos(&x, &y);

  		if (bmp_display(addr, x, y) == 0)

  			return (void *)lcd_base;

  	}
  #endif /* CONFIG_SPLASH_SCREEN */

  	bitmap_plot(0, 0);

  #ifdef CONFIG_LCD_INFO
  	console_col = LCD_INFO_X / VIDEO_FONT_WIDTH;
  	console_row = LCD_INFO_Y / VIDEO_FONT_HEIGHT;
  	lcd_show_board_info();
  #endif /* CONFIG_LCD_INFO */

  #if defined(CONFIG_LCD_LOGO) && !defined(CONFIG_LCD_INFO_BELOW_LOGO)

  	return (void *)((ulong)lcd_base + BMP_LOGO_HEIGHT * lcd_line_length);

  #else

  	return (void *)lcd_base;

  #endif /* CONFIG_LCD_LOGO && !defined(CONFIG_LCD_INFO_BELOW_LOGO) */

  }

  #ifdef CONFIG_SPLASHIMAGE_GUARD
  static int on_splashimage(const char *name, const char *value, enum env_op op,
  	int flags)
  {
  	ulong addr;
  	int aligned;
  
  	if (op == env_op_delete)
  		return 0;
  
  	addr = simple_strtoul(value, NULL, 16);
  	/* See README.displaying-bmps */
  	aligned = (addr % 4 == 2);
  	if (!aligned) {
  		printf("Invalid splashimage value. Value must be 16 bit aligned, but not 32 bit aligned
  ");
  		return -1;
  	}
  
  	return 0;
  }
  
  U_BOOT_ENV_CALLBACK(splashimage, on_splashimage);
  #endif

  void lcd_position_cursor(unsigned col, unsigned row)
  {
  	console_col = min(col, CONSOLE_COLS - 1);
  	console_row = min(row, CONSOLE_ROWS - 1);
  }
  
  int lcd_get_pixel_width(void)
  {
  	return panel_info.vl_col;
  }
  
  int lcd_get_pixel_height(void)
  {
  	return panel_info.vl_row;
  }
  
  int lcd_get_screen_rows(void)
  {
  	return CONSOLE_ROWS;
  }
  
  int lcd_get_screen_columns(void)
  {
  	return CONSOLE_COLS;
  }

  
  #if defined(CONFIG_LCD_DT_SIMPLEFB)
  static int lcd_dt_simplefb_configure_node(void *blob, int off)
  {
  	u32 stride;
  	fdt32_t cells[2];
  	int ret;

  	static const char format[] =

  #if LCD_BPP == LCD_COLOR16
  		"r5g6b5";
  #else
  		"";
  #endif
  
  	if (!format[0])
  		return -1;
  
  	stride = panel_info.vl_col * 2;
  
  	cells[0] = cpu_to_fdt32(gd->fb_base);
  	cells[1] = cpu_to_fdt32(stride * panel_info.vl_row);
  	ret = fdt_setprop(blob, off, "reg", cells, sizeof(cells[0]) * 2);
  	if (ret < 0)
  		return -1;
  
  	cells[0] = cpu_to_fdt32(panel_info.vl_col);
  	ret = fdt_setprop(blob, off, "width", cells, sizeof(cells[0]));
  	if (ret < 0)
  		return -1;
  
  	cells[0] = cpu_to_fdt32(panel_info.vl_row);
  	ret = fdt_setprop(blob, off, "height", cells, sizeof(cells[0]));
  	if (ret < 0)
  		return -1;
  
  	cells[0] = cpu_to_fdt32(stride);
  	ret = fdt_setprop(blob, off, "stride", cells, sizeof(cells[0]));
  	if (ret < 0)
  		return -1;
  
  	ret = fdt_setprop(blob, off, "format", format, strlen(format) + 1);
  	if (ret < 0)
  		return -1;
  
  	ret = fdt_delprop(blob, off, "status");
  	if (ret < 0)
  		return -1;
  
  	return 0;
  }
  
  int lcd_dt_simplefb_add_node(void *blob)
  {

  	static const char compat[] = "simple-framebuffer";
  	static const char disabled[] = "disabled";

  	int off, ret;
  
  	off = fdt_add_subnode(blob, 0, "framebuffer");
  	if (off < 0)
  		return -1;
  
  	ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
  	if (ret < 0)
  		return -1;
  
  	ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
  	if (ret < 0)
  		return -1;
  
  	return lcd_dt_simplefb_configure_node(blob, off);
  }
  
  int lcd_dt_simplefb_enable_existing_node(void *blob)
  {
  	int off;
  
  	off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
  	if (off < 0)
  		return -1;
  
  	return lcd_dt_simplefb_configure_node(blob, off);
  }
  #endif