/*
 * 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();
}

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

void lcd_putc(const char c)
{
        if (!lcd_is_enabled) {
                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();
        }
}

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

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]\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 */


/************************************************************************/
/* ** 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...\n");
        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\n", 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\n", 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\n", 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\n",
              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\n",
                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 = le32_to_cpu(bmp->header.width);
        height = le32_to_cpu(bmp->header.height);
        bmap = (uchar *)bmp + le32_to_cpu(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\n", bmp_image);

                return 1;
        }

        width = le32_to_cpu(bmp->header.width);
        height = le32_to_cpu(bmp->header.height);
        bmp_bpix = le16_to_cpu(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\n",
                        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\n",
                        bpix,
                        le16_to_cpu(bmp->header.bit_count));

                return 1;
        }

        debug("Display-bmp: %d x %d  with %d colors\n",
                (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 + le32_to_cpu(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
                if (le32_to_cpu(bmp->header.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\n");
                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