path: root/drivers/cfb_console.c

/*
 * (C) Copyright 2002 ELTEC Elektronik AG
 * Frank Gottschling <fgottschling@eltec.de>
 *
 * 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
 */

/*
 * cfb_console.c
 *
 * Color Framebuffer Console driver for 8/15/16/24/32 bits per pixel.
 *
 * At the moment only the 8x16 font is tested and the font fore- and
 * background color is limited to black/white/gray colors. The Linux
 * logo can be placed in the upper left corner and additional board
 * information strings (that normaly goes to serial port) can be drawed.
 *
 * The console driver can use the standard PC keyboard interface (i8042)
 * for character input. Character output goes to a memory mapped video
 * framebuffer with little or big-endian organisation.
 * With environment setting 'console=serial' the console i/o can be
 * forced to serial port.

 The driver uses graphic specific defines/parameters/functions:

 (for SMI LynxE graphic chip)

 CONFIG_VIDEO_SMI_LYNXEM - use graphic driver for SMI 710,712,810
 VIDEO_FB_LITTLE_ENDIAN  - framebuffer organisation default: big endian
 VIDEO_HW_RECTFILL       - graphic driver supports hardware rectangle fill
 VIDEO_HW_BITBLT         - graphic driver supports hardware bit blt

 Console Parameters are set by graphic drivers global struct:

 VIDEO_VISIBLE_COLS          - x resolution
 VIDEO_VISIBLE_ROWS          - y resolution
 VIDEO_PIXEL_SIZE            - storage size in byte per pixel
 VIDEO_DATA_FORMAT           - graphical data format GDF
 VIDEO_FB_ADRS               - start of video memory

 CONFIG_I8042_KBD            - AT Keyboard driver for i8042
 VIDEO_KBD_INIT_FCT          - init function for keyboard
 VIDEO_TSTC_FCT              - keyboard_tstc function
 VIDEO_GETC_FCT              - keyboard_getc function

 CONFIG_CONSOLE_CURSOR       - on/off drawing cursor is done with delay
			       loop in VIDEO_TSTC_FCT (i8042)
 CFG_CONSOLE_BLINK_COUNT     - value for delay loop - blink rate
 CONFIG_CONSOLE_TIME         - display time/date in upper right corner,
			       needs CFG_CMD_DATE and CONFIG_CONSOLE_CURSOR
 CONFIG_VIDEO_LOGO           - display Linux Logo in upper left corner
 CONFIG_VIDEO_BMP_LOGO       - use bmp_logo instead of linux_logo
 CONFIG_CONSOLE_EXTRA_INFO   - display additional board information strings
			       that normaly goes to serial port. This define
			       requires a board specific function:
			       video_drawstring (VIDEO_INFO_X,
						 VIDEO_INFO_Y + i*VIDEO_FONT_HEIGHT,
						 info);
			       that fills a info buffer at i=row.
			       s.a: board/eltec/bab7xx.
CONFIG_VGA_AS_SINGLE_DEVICE  - If set the framebuffer device will be initialised
			       as an output only device. The Keyboard driver
			       will not be set-up. This may be used, if you
			       have none or more than one Keyboard devices
			       (USB Keyboard, AT Keyboard).

CONFIG_VIDEO_SW_CURSOR:      - Draws a cursor after the last character. No
			       blinking is provided. Uses the macros CURSOR_SET
			       and CURSOR_OFF.
CONFIG_VIDEO_HW_CURSOR:      - Uses the hardware cursor capability of the
			       graphic chip. Uses the macro CURSOR_SET.
			       ATTENTION: If booting an OS, the display driver
			       must disable the hardware register of the graphic
			       chip. Otherwise a blinking field is displayed
*/

#include <common.h>

#ifdef CONFIG_CFB_CONSOLE

#include <malloc.h>

/*****************************************************************************/
/* Console device defines with SMI graphic                                   */
/* Any other graphic must change this section                                */
/*****************************************************************************/

#ifdef  CONFIG_VIDEO_SMI_LYNXEM

#define VIDEO_FB_LITTLE_ENDIAN
#define VIDEO_HW_RECTFILL
#define VIDEO_HW_BITBLT
#endif

/*****************************************************************************/
/* Defines for the CT69000 driver                                            */
/*****************************************************************************/
#ifdef  CONFIG_VIDEO_CT69000

#define VIDEO_FB_LITTLE_ENDIAN
#define VIDEO_HW_RECTFILL
#define VIDEO_HW_BITBLT
#endif

/*****************************************************************************/
/* Defines for the SED13806 driver                                           */
/*****************************************************************************/
#ifdef CONFIG_VIDEO_SED13806

#define VIDEO_FB_LITTLE_ENDIAN
#define VIDEO_HW_RECTFILL
#define VIDEO_HW_BITBLT
#endif

/*****************************************************************************/
/* Include video_fb.h after definitions of VIDEO_HW_RECTFILL etc             */
/*****************************************************************************/
#include <video_fb.h>

/*****************************************************************************/
/* some Macros                                                               */
/*****************************************************************************/
#define VIDEO_VISIBLE_COLS      (pGD->winSizeX)
#define VIDEO_VISIBLE_ROWS      (pGD->winSizeY)
#define VIDEO_PIXEL_SIZE        (pGD->gdfBytesPP)
#define VIDEO_DATA_FORMAT       (pGD->gdfIndex)
#define VIDEO_FB_ADRS           (pGD->frameAdrs)

/*****************************************************************************/
/* Console device defines with i8042 keyboard controller                     */
/* Any other keyboard controller must change this section                    */
/*****************************************************************************/

#ifdef  CONFIG_I8042_KBD
#include <i8042.h>

#define VIDEO_KBD_INIT_FCT      i8042_kbd_init()
#define VIDEO_TSTC_FCT          i8042_tstc
#define VIDEO_GETC_FCT          i8042_getc
#endif

/*****************************************************************************/
/* Console device                                                            */
/*****************************************************************************/

#include <version.h>
#include <linux/types.h>
#include <devices.h>
#include <video_font.h>
#ifdef CFG_CMD_DATE
#include <rtc.h>

#endif

/*****************************************************************************/
/* Cursor definition:                                                        */
/* CONFIG_CONSOLE_CURSOR:  Uses a timer function (see drivers/i8042.c) to    */
/*                         let the cursor blink. Uses the macros CURSOR_OFF  */
/*                         and CURSOR_ON.                                    */
/* CONFIG_VIDEO_SW_CURSOR: Draws a cursor after the last character. No       */
/*                         blinking is provided. Uses the macros CURSOR_SET  */
/*                         and CURSOR_OFF.                                   */
/* CONFIG_VIDEO_HW_CURSOR: Uses the hardware cursor capability of the        */
/*                         graphic chip. Uses the macro CURSOR_SET.          */
/*                         ATTENTION: If booting an OS, the display driver   */
/*                         must disable the hardware register of the graphic */
/*                         chip. Otherwise a blinking field is displayed     */
/*****************************************************************************/
#if !defined(CONFIG_CONSOLE_CURSOR) && \
    !defined(CONFIG_VIDEO_SW_CURSOR) && \
    !defined(CONFIG_VIDEO_HW_CURSOR)
/* no Cursor defined */
#define CURSOR_ON
#define CURSOR_OFF
#define CURSOR_SET
#endif

#ifdef  CONFIG_CONSOLE_CURSOR
#ifdef  CURSOR_ON
#error  only one of CONFIG_CONSOLE_CURSOR,CONFIG_VIDEO_SW_CURSOR,CONFIG_VIDEO_HW_CURSOR can be defined
#endif
void    console_cursor (int state);
#define CURSOR_ON  console_cursor(1);
#define CURSOR_OFF console_cursor(0);
#define CURSOR_SET
#ifndef CONFIG_I8042_KBD
#warning Cursor drawing on/off needs timer function s.a. drivers/i8042.c
#endif
#else
#ifdef  CONFIG_CONSOLE_TIME
#error  CONFIG_CONSOLE_CURSOR must be defined for CONFIG_CONSOLE_TIME
#endif
#endif /* CONFIG_CONSOLE_CURSOR */

#ifdef  CONFIG_VIDEO_SW_CURSOR
#ifdef  CURSOR_ON
#error  only one of CONFIG_CONSOLE_CURSOR,CONFIG_VIDEO_SW_CURSOR,CONFIG_VIDEO_HW_CURSOR can be defined
#endif
#define CURSOR_ON
#define CURSOR_OFF video_putchar(console_col * VIDEO_FONT_WIDTH,\
				 console_row * VIDEO_FONT_HEIGHT, ' ');
#define CURSOR_SET video_set_cursor();
#endif /* CONFIG_VIDEO_SW_CURSOR */


#ifdef CONFIG_VIDEO_HW_CURSOR
#ifdef  CURSOR_ON
#error  only one of CONFIG_CONSOLE_CURSOR,CONFIG_VIDEO_SW_CURSOR,CONFIG_VIDEO_HW_CURSOR can be defined
#endif
#define CURSOR_ON
#define CURSOR_OFF
#define CURSOR_SET video_set_hw_cursor(console_col * VIDEO_FONT_WIDTH, \
		  (console_row * VIDEO_FONT_HEIGHT) + VIDEO_LOGO_HEIGHT);
#endif  /* CONFIG_VIDEO_HW_CURSOR */

#ifdef  CONFIG_VIDEO_LOGO
#ifdef  CONFIG_VIDEO_BMP_LOGO
#include <bmp_logo.h>
#define VIDEO_LOGO_WIDTH        BMP_LOGO_WIDTH
#define VIDEO_LOGO_HEIGHT       BMP_LOGO_HEIGHT
#define VIDEO_LOGO_LUT_OFFSET   BMP_LOGO_OFFSET
#define VIDEO_LOGO_COLORS       BMP_LOGO_COLORS

#else   /* CONFIG_VIDEO_BMP_LOGO */
#define LINUX_LOGO_WIDTH        80
#define LINUX_LOGO_HEIGHT       80
#define LINUX_LOGO_COLORS       214
#define LINUX_LOGO_LUT_OFFSET   0x20
#define __initdata
#include <linux_logo.h>
#define VIDEO_LOGO_WIDTH        LINUX_LOGO_WIDTH
#define VIDEO_LOGO_HEIGHT       LINUX_LOGO_HEIGHT
#define VIDEO_LOGO_LUT_OFFSET   LINUX_LOGO_LUT_OFFSET
#define VIDEO_LOGO_COLORS       LINUX_LOGO_COLORS
#endif  /* CONFIG_VIDEO_BMP_LOGO */
#define VIDEO_INFO_X            (VIDEO_LOGO_WIDTH)
#define VIDEO_INFO_Y            (VIDEO_FONT_HEIGHT/2)
#else   /* CONFIG_VIDEO_LOGO */
#define VIDEO_LOGO_WIDTH        0
#define VIDEO_LOGO_HEIGHT       0
#endif  /* CONFIG_VIDEO_LOGO */

#define VIDEO_COLS              VIDEO_VISIBLE_COLS
#define VIDEO_ROWS              VIDEO_VISIBLE_ROWS
#define VIDEO_SIZE              (VIDEO_ROWS*VIDEO_COLS*VIDEO_PIXEL_SIZE)
#define VIDEO_PIX_BLOCKS        (VIDEO_SIZE >> 2)
#define VIDEO_LINE_LEN          (VIDEO_COLS*VIDEO_PIXEL_SIZE)
#define VIDEO_BURST_LEN         (VIDEO_COLS/8)

#ifdef  CONFIG_VIDEO_LOGO
#define CONSOLE_ROWS            ((VIDEO_ROWS - VIDEO_LOGO_HEIGHT) / VIDEO_FONT_HEIGHT)
#else
#define CONSOLE_ROWS            (VIDEO_ROWS / VIDEO_FONT_HEIGHT)
#endif

#define CONSOLE_COLS            (VIDEO_COLS / VIDEO_FONT_WIDTH)
#define CONSOLE_ROW_SIZE        (VIDEO_FONT_HEIGHT * VIDEO_LINE_LEN)
#define CONSOLE_ROW_FIRST       (video_console_address)
#define CONSOLE_ROW_SECOND      (video_console_address + CONSOLE_ROW_SIZE)
#define CONSOLE_ROW_LAST        (video_console_address + CONSOLE_SIZE - CONSOLE_ROW_SIZE)
#define CONSOLE_SIZE            (CONSOLE_ROW_SIZE * CONSOLE_ROWS)
#define CONSOLE_SCROLL_SIZE     (CONSOLE_SIZE - CONSOLE_ROW_SIZE)

/* Macros */
#ifdef  VIDEO_FB_LITTLE_ENDIAN
#define SWAP16(x)        ((((x) & 0x00ff) << 8) | ( (x) >> 8))
#define SWAP32(x)        ((((x) & 0x000000ff) << 24) | (((x) & 0x0000ff00) << 8)|\
			  (((x) & 0x00ff0000) >>  8) | (((x) & 0xff000000) >> 24) )
#define SHORTSWAP32(x)   ((((x) & 0x000000ff) <<  8) | (((x) & 0x0000ff00) >> 8)|\
			  (((x) & 0x00ff0000) <<  8) | (((x) & 0xff000000) >> 8) )
#else
#define SWAP16(x)        (x)
#define SWAP32(x)        (x)
#define SHORTSWAP32(x)   (x)
#endif

#if defined(DEBUG) || defined(DEBUG_CFB_CONSOLE)
#define PRINTD(x)         printf(x)
#else
#define PRINTD(x)
#endif


#ifdef CONFIG_CONSOLE_EXTRA_INFO
extern void video_get_info_str (    /* setup a board string: type, speed, etc. */
    int line_number,        /* location to place info string beside logo */
    char *info              /* buffer for info string */
    );

#endif

/* Locals */
static GraphicDevice *pGD;	/* Pointer to Graphic array */

static void *video_fb_address;          /* frame buffer address */
static void *video_console_address;     /* console buffer start address */

static int console_col = 0; /* cursor col */
static int console_row = 0; /* cursor row */

static u32 eorx, fgx, bgx;  /* color pats */

static const int video_font_draw_table8[] = {
	    0x00000000, 0x000000ff, 0x0000ff00, 0x0000ffff,
	    0x00ff0000, 0x00ff00ff, 0x00ffff00, 0x00ffffff,
	    0xff000000, 0xff0000ff, 0xff00ff00, 0xff00ffff,
	    0xffff0000, 0xffff00ff, 0xffffff00, 0xffffffff };

static const int video_font_draw_table15[] = {
	    0x00000000, 0x00007fff, 0x7fff0000, 0x7fff7fff };

static const int video_font_draw_table16[] = {
	    0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff };

static const int video_font_draw_table24[16][3] = {
	    { 0x00000000, 0x00000000, 0x00000000 },
	    { 0x00000000, 0x00000000, 0x00ffffff },
	    { 0x00000000, 0x0000ffff, 0xff000000 },
	    { 0x00000000, 0x0000ffff, 0xffffffff },
	    { 0x000000ff, 0xffff0000, 0x00000000 },
	    { 0x000000ff, 0xffff0000, 0x00ffffff },
	    { 0x000000ff, 0xffffffff, 0xff000000 },
	    { 0x000000ff, 0xffffffff, 0xffffffff },
	    { 0xffffff00, 0x00000000, 0x00000000 },
	    { 0xffffff00, 0x00000000, 0x00ffffff },
	    { 0xffffff00, 0x0000ffff, 0xff000000 },
	    { 0xffffff00, 0x0000ffff, 0xffffffff },
	    { 0xffffffff, 0xffff0000, 0x00000000 },
	    { 0xffffffff, 0xffff0000, 0x00ffffff },
	    { 0xffffffff, 0xffffffff, 0xff000000 },
	    { 0xffffffff, 0xffffffff, 0xffffffff } };

static const int video_font_draw_table32[16][4] = {
	    { 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
	    { 0x00000000, 0x00000000, 0x00000000, 0x00ffffff },
	    { 0x00000000, 0x00000000, 0x00ffffff, 0x00000000 },
	    { 0x00000000, 0x00000000, 0x00ffffff, 0x00ffffff },
	    { 0x00000000, 0x00ffffff, 0x00000000, 0x00000000 },
	    { 0x00000000, 0x00ffffff, 0x00000000, 0x00ffffff },
	    { 0x00000000, 0x00ffffff, 0x00ffffff, 0x00000000 },
	    { 0x00000000, 0x00ffffff, 0x00ffffff, 0x00ffffff },
	    { 0x00ffffff, 0x00000000, 0x00000000, 0x00000000 },
	    { 0x00ffffff, 0x00000000, 0x00000000, 0x00ffffff },
	    { 0x00ffffff, 0x00000000, 0x00ffffff, 0x00000000 },
	    { 0x00ffffff, 0x00000000, 0x00ffffff, 0x00ffffff },
	    { 0x00ffffff, 0x00ffffff, 0x00000000, 0x00000000 },
	    { 0x00ffffff, 0x00ffffff, 0x00000000, 0x00ffffff },
	    { 0x00ffffff, 0x00ffffff, 0x00ffffff, 0x00000000 },
	    { 0x00ffffff, 0x00ffffff, 0x00ffffff, 0x00ffffff } };


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


static void video_drawchars (int xx, int yy, unsigned char *s, int count)
{
    u8  *cdat, *dest, *dest0;
    int rows, offset, c;

    offset = yy * VIDEO_LINE_LEN + xx * VIDEO_PIXEL_SIZE;
    dest0 = video_fb_address + offset;

    switch (VIDEO_DATA_FORMAT)
    {
    case GDF__8BIT_INDEX:
    case GDF__8BIT_332RGB:
	while (count--)
	{
	c = *s ;
	cdat = video_fontdata + c * VIDEO_FONT_HEIGHT;
	for (rows = VIDEO_FONT_HEIGHT, dest = dest0; rows--; dest += VIDEO_LINE_LEN)
	{
	    u8 bits = *cdat++;
	    ((u32 *)dest)[0] = (video_font_draw_table8[bits >> 4] & eorx) ^ bgx;
	    ((u32 *)dest)[1] = (video_font_draw_table8[bits & 15] & eorx) ^ bgx;
	}
	dest0 += VIDEO_FONT_WIDTH * VIDEO_PIXEL_SIZE;
	s++;
	}
	break;

    case GDF_15BIT_555RGB:
	while (count--)
	{
	c = *s ;
	cdat = video_fontdata + c * VIDEO_FONT_HEIGHT;
	for (rows = VIDEO_FONT_HEIGHT, dest = dest0; rows--; dest += VIDEO_LINE_LEN)
	{
	    u8 bits = *cdat++;
	    ((u32 *)dest)[0] = SHORTSWAP32((video_font_draw_table15[bits >> 6] & eorx) ^ bgx);
	    ((u32 *)dest)[1] = SHORTSWAP32((video_font_draw_table15[bits >> 4 & 3] & eorx) ^ bgx);
	    ((u32 *)dest)[2] = SHORTSWAP32((video_font_draw_table15[bits >> 2 & 3] & eorx) ^ bgx);
	    ((u32 *)dest)[3] = SHORTSWAP32((video_font_draw_table15[bits & 3] & eorx) ^ bgx);
	    }
	    dest0 += VIDEO_FONT_WIDTH * VIDEO_PIXEL_SIZE;
	    s++ ;
	}
	break;

    case GDF_16BIT_565RGB:
	while (count--)
	{
	c = *s ;
	cdat = video_fontdata + c * VIDEO_FONT_HEIGHT;
	for (rows = VIDEO_FONT_HEIGHT, dest = dest0; rows--; dest += VIDEO_LINE_LEN)
	{
	    u8 bits = *cdat++;
	    ((u32 *)dest)[0] = SHORTSWAP32((video_font_draw_table16[bits >> 6] & eorx) ^ bgx);
	    ((u32 *)dest)[1] = SHORTSWAP32((video_font_draw_table16[bits >> 4 & 3] & eorx) ^ bgx);
	    ((u32 *)dest)[2] = SHORTSWAP32((video_font_draw_table16[bits >> 2 & 3] & eorx) ^ bgx);
	    ((u32 *)dest)[3] = SHORTSWAP32((video_font_draw_table16[bits & 3] & eorx) ^ bgx);
	}
	dest0 += VIDEO_FONT_WIDTH * VIDEO_PIXEL_SIZE;
	s++ ;
	}
	break;

    case GDF_32BIT_X888RGB:
	while (count--)
	{
	c = *s ;
	cdat = video_fontdata + c * VIDEO_FONT_HEIGHT;
	for (rows = VIDEO_FONT_HEIGHT, dest = dest0; rows--; dest += VIDEO_LINE_LEN)
	{
	    u8 bits = *cdat++;
	    ((u32 *)dest)[0] = SWAP32((video_font_draw_table32[bits >> 4][0] & eorx) ^ bgx);
	    ((u32 *)dest)[1] = SWAP32((video_font_draw_table32[bits >> 4][1] & eorx) ^ bgx);
	    ((u32 *)dest)[2] = SWAP32((video_font_draw_table32[bits >> 4][2] & eorx) ^ bgx);
	    ((u32 *)dest)[3] = SWAP32((video_font_draw_table32[bits >> 4][3] & eorx) ^ bgx);
	    ((u32 *)dest)[4] = SWAP32((video_font_draw_table32[bits & 15][0] & eorx) ^ bgx);
	    ((u32 *)dest)[5] = SWAP32((video_font_draw_table32[bits & 15][1] & eorx) ^ bgx);
	    ((u32 *)dest)[6] = SWAP32((video_font_draw_table32[bits & 15][2] & eorx) ^ bgx);
	    ((u32 *)dest)[7] = SWAP32((video_font_draw_table32[bits & 15][3] & eorx) ^ bgx);
	}
	dest0 += VIDEO_FONT_WIDTH * VIDEO_PIXEL_SIZE;
	s++ ;
	}
	break;

    case GDF_24BIT_888RGB:
	while (count--)
	{
	c = *s ;
	cdat = video_fontdata + c * VIDEO_FONT_HEIGHT;
	for (rows = VIDEO_FONT_HEIGHT, dest = dest0; rows--; dest += VIDEO_LINE_LEN)
	{
	    u8 bits = *cdat++;
	    ((u32 *)dest)[0] = (video_font_draw_table24[bits >> 4][0] & eorx) ^ bgx;
	    ((u32 *)dest)[1] = (video_font_draw_table24[bits >> 4][1] & eorx) ^ bgx;
	    ((u32 *)dest)[2] = (video_font_draw_table24[bits >> 4][2] & eorx) ^ bgx;
	    ((u32 *)dest)[3] = (video_font_draw_table24[bits & 15][0] & eorx) ^ bgx;
	    ((u32 *)dest)[4] = (video_font_draw_table24[bits & 15][1] & eorx) ^ bgx;
	    ((u32 *)dest)[5] = (video_font_draw_table24[bits & 15][2] & eorx) ^ bgx;
	}
	dest0 += VIDEO_FONT_WIDTH * VIDEO_PIXEL_SIZE;
	s++ ;
	}
	break;
    }
}

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

static inline void video_drawstring(int xx, int yy, unsigned char *s)
{
    video_drawchars (xx, yy, s, strlen(s));
}

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

static void video_putchar(int xx, int yy, unsigned char c)
{
    video_drawchars (xx, yy + VIDEO_LOGO_HEIGHT, &c, 1);
}

/*****************************************************************************/
#if defined(CONFIG_CONSOLE_CURSOR) || defined(CONFIG_VIDEO_SW_CURSOR)
static void video_set_cursor(void)
{
    /* swap drawing colors */
    eorx = fgx;
    fgx  = bgx;
    bgx  = eorx;
    eorx = fgx ^ bgx;
    /* draw cursor */
    video_putchar (console_col * VIDEO_FONT_WIDTH,
		   console_row * VIDEO_FONT_HEIGHT, ' ');
    /* restore drawing colors */
    eorx = fgx;
    fgx  = bgx;
    bgx  = eorx;
    eorx = fgx ^ bgx;
}
#endif
/*****************************************************************************/
#ifdef CONFIG_CONSOLE_CURSOR
void console_cursor (int state)
{
    static int last_state = 0;
#ifdef CONFIG_CONSOLE_TIME
    struct rtc_time tm;
    char info[16];

    /* time update only if cursor is on (faster scroll) */
    if (state)
    {
    rtc_get (&tm);

    sprintf(info, " %02d:%02d:%02d ", tm.tm_hour, tm.tm_min, tm.tm_sec);
    video_drawstring(VIDEO_VISIBLE_COLS-10*VIDEO_FONT_WIDTH,
	     VIDEO_INFO_Y, info);

    sprintf(info, "%02d.%02d.%04d", tm.tm_mday, tm.tm_mon, tm.tm_year);
    video_drawstring(VIDEO_VISIBLE_COLS-10*VIDEO_FONT_WIDTH,
	     VIDEO_INFO_Y+1*VIDEO_FONT_HEIGHT, info);
    }
#endif

    if (state && (last_state != state))
    {
	video_set_cursor();
    }

    if (!state && (last_state != state))
    {
	/* clear cursor */
	video_putchar (console_col * VIDEO_FONT_WIDTH,
		       console_row * VIDEO_FONT_HEIGHT, ' ');
    }

    last_state = state;
}
#endif

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

#ifndef VIDEO_HW_RECTFILL
static void memsetl (int *p, int c, int v)
{
    while (c--)
	*(p++) = v;
}
#endif

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

#ifndef VIDEO_HW_BITBLT
static void memcpyl (int *d, int *s, int c)
{
    while (c--)
	*(d++) = *(s++);
}
#endif

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

static void console_scrollup (void)
{
    /* copy up rows ignoring the first one */

#ifdef VIDEO_HW_BITBLT
    video_hw_bitblt (
    VIDEO_PIXEL_SIZE,     /* bytes per pixel */
    0,                    /* source pos x */
    VIDEO_LOGO_HEIGHT + VIDEO_FONT_HEIGHT, /* source pos y */
    0,                    /* dest pos x */
    VIDEO_LOGO_HEIGHT,    /* dest pos y */
    VIDEO_VISIBLE_COLS,   /* frame width */
    VIDEO_VISIBLE_ROWS - VIDEO_LOGO_HEIGHT - VIDEO_FONT_HEIGHT /* frame height */
    );
#else
    memcpyl (CONSOLE_ROW_FIRST, CONSOLE_ROW_SECOND, CONSOLE_SCROLL_SIZE >> 2);
#endif

    /* clear the last one */
#ifdef VIDEO_HW_RECTFILL
    video_hw_rectfill (
    VIDEO_PIXEL_SIZE,     /* bytes per pixel */
    0,                    /* dest pos x */
    VIDEO_VISIBLE_ROWS - VIDEO_FONT_HEIGHT,  /* dest pos y */
    VIDEO_VISIBLE_COLS,   /* frame width */
    VIDEO_FONT_HEIGHT,    /* frame height */
    CONSOLE_BG_COL          /* fill color */
    );
#else
    memsetl (CONSOLE_ROW_LAST, CONSOLE_ROW_SIZE >> 2, CONSOLE_BG_COL);
#endif
}

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

static void console_back (void)
{
    CURSOR_OFF
    console_col--;

    if (console_col < 0)
    {
	console_col = CONSOLE_COLS - 1;
	console_row--;
	if (console_row < 0)
	console_row = 0;
    }
    video_putchar (console_col * VIDEO_FONT_WIDTH,
		   console_row * VIDEO_FONT_HEIGHT, ' ');
}

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

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

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

    /* Decrement row number */
    console_row--;
    }
}

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

void video_putc (const char c)
{
    switch (c)
    {
    case 13: /* ignore */
	break;

    case '\n': /* next line */
	console_newline();
	break;

    case 9:    /* tab 8 */
	CURSOR_OFF
	console_col |=  0x0008;
	console_col &= ~0x0007;

	if (console_col >= CONSOLE_COLS)
	    console_newline();
	break;

    case 8:    /* backspace */
	console_back();
	break;

    default: /* draw the char */
	video_putchar (console_col * VIDEO_FONT_WIDTH,
		       console_row * VIDEO_FONT_HEIGHT, c);
	console_col++ ;

	/* check for newline */
	if (console_col >= CONSOLE_COLS)
	    console_newline();
    }
    CURSOR_SET
}


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

void video_puts (const char *s)
{
    int count = strlen(s);

    while(count--)
	video_putc(*s++);
}

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

#ifdef CONFIG_VIDEO_LOGO
void logo_plot (void *screen, int width, int x, int y)
{

    int skip = (width - VIDEO_LOGO_WIDTH) * VIDEO_PIXEL_SIZE,
	xcount, i,
	ycount = VIDEO_LOGO_HEIGHT;
    unsigned char
	*source,
	*dest   = (unsigned char *) screen + ((y * width * VIDEO_PIXEL_SIZE) + x),
	r, g, b, *logo_red, *logo_blue, *logo_green;

#ifdef CONFIG_VIDEO_BMP_LOGO
    source = bmp_logo_bitmap;

    /* Allocate temporary space for computing colormap                       */
    logo_red = malloc (BMP_LOGO_COLORS);
    logo_green = malloc (BMP_LOGO_COLORS);
    logo_blue = malloc (BMP_LOGO_COLORS);
    /* Compute color map                                                     */
    for (i = 0; i < VIDEO_LOGO_COLORS; i++) {
	logo_red [i] = (bmp_logo_palette [i] & 0x0f00) >> 4;
	logo_green [i] = (bmp_logo_palette [i] & 0x00f0);
	logo_blue [i] = (bmp_logo_palette [i] & 0x000f) << 4;
    }
#else
    source = linux_logo;
    logo_red = linux_logo_red;
    logo_green = linux_logo_green;
    logo_blue = linux_logo_blue;
#endif

    if (VIDEO_DATA_FORMAT == GDF__8BIT_INDEX)
    {
	for (i = 0; i < VIDEO_LOGO_COLORS; i++)
	{
	    video_set_lut (i + VIDEO_LOGO_LUT_OFFSET,
			   logo_red [i], logo_green [i], logo_blue [i]);
	}
    }

    while (ycount--)
    {
	xcount = VIDEO_LOGO_WIDTH;
	while (xcount--)
	{
	    r = logo_red [*source - VIDEO_LOGO_LUT_OFFSET];
	    g = logo_green [*source - VIDEO_LOGO_LUT_OFFSET];
	    b = logo_blue [*source - VIDEO_LOGO_LUT_OFFSET];

	    switch (VIDEO_DATA_FORMAT)
	    {
	    case GDF__8BIT_INDEX:
		*dest = *source;
		break;
	    case GDF__8BIT_332RGB:
		*dest = ((r>>5)<<5) | ((g>>5)<<2) | (b>>6);
		break;
	    case GDF_15BIT_555RGB:
		*(unsigned short *)dest =
		    SWAP16((unsigned short)(((r>>3)<<10) | ((g>>3)<<5) | (b>>3)));
		break;
	    case GDF_16BIT_565RGB:
		*(unsigned short *)dest =
		    SWAP16((unsigned short)(((r>>3)<<11) | ((g>>2)<<5) | (b>>3)));
		break;
	    case GDF_32BIT_X888RGB:
		*(unsigned long  *)dest =
		    SWAP32((unsigned long)((r<<16) | (g<<8) | b));
		break;
	    case GDF_24BIT_888RGB:
#ifdef VIDEO_FB_LITTLE_ENDIAN
		dest[0] = b;
		dest[1] = g;
		dest[2] = r;
#else
		dest[0] = r;
		dest[1] = g;
		dest[2] = b;
#endif
		break;
	    }
	    source++;
	    dest += VIDEO_PIXEL_SIZE;
	}
	dest += skip;
    }
#ifdef CONFIG_VIDEO_BMP_LOGO
    free (logo_red);
    free (logo_green);
    free (logo_blue);
#endif
}

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

static void *video_logo (void)
{
    char info[128];
    extern char version_string;

    logo_plot (video_fb_address, VIDEO_COLS, 0, 0);

    sprintf(info, " %s", &version_string);
    video_drawstring (VIDEO_INFO_X, VIDEO_INFO_Y, info);

#ifdef CONFIG_CONSOLE_EXTRA_INFO
    {
    int i, n = ((VIDEO_LOGO_HEIGHT-VIDEO_FONT_HEIGHT)/VIDEO_FONT_HEIGHT);

    for (i = 1; i < n; i++)
    {
	video_get_info_str (i, info);
	if (*info)
	video_drawstring (VIDEO_INFO_X,
			  VIDEO_INFO_Y + i*VIDEO_FONT_HEIGHT, info);
    }
    }
#endif

    return (video_fb_address + VIDEO_LOGO_HEIGHT * VIDEO_LINE_LEN);
}
#endif


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

static int video_init(void)
{
    unsigned char color8;

    if ((pGD=video_hw_init()) == NULL)
	return -1;

    video_fb_address = (void*)VIDEO_FB_ADRS;
#ifdef CONFIG_VIDEO_HW_CURSOR
    video_init_hw_cursor(VIDEO_FONT_WIDTH, VIDEO_FONT_HEIGHT);
#endif

    /* Init drawing pats */
    switch (VIDEO_DATA_FORMAT)
    {
    case GDF__8BIT_INDEX:
	video_set_lut (0x01, CONSOLE_FG_COL, CONSOLE_FG_COL, CONSOLE_FG_COL);
	video_set_lut (0x00, CONSOLE_BG_COL, CONSOLE_BG_COL, CONSOLE_BG_COL);
	fgx = 0x01010101;
	bgx = 0x00000000;
	break;
    case GDF__8BIT_332RGB:
	color8 = ((CONSOLE_FG_COL & 0xe0) | ((CONSOLE_FG_COL>>3) & 0x1c) | CONSOLE_FG_COL>>6);
	fgx = (color8<<24) | (color8<<16) | (color8<<8) | color8;
	color8 = ((CONSOLE_BG_COL & 0xe0) | ((CONSOLE_BG_COL>>3) & 0x1c) | CONSOLE_BG_COL>>6);
	bgx = (color8<<24) | (color8<<16) | (color8<<8) | color8;
	break;
    case GDF_15BIT_555RGB:
	fgx = (((CONSOLE_FG_COL>>3)<<26) | ((CONSOLE_FG_COL>>3)<<21) | ((CONSOLE_FG_COL>>3)<<16) |
	   ((CONSOLE_FG_COL>>3)<<10) | ((CONSOLE_FG_COL>>3)<<5)  |  (CONSOLE_FG_COL>>3));
	bgx = (((CONSOLE_BG_COL>>3)<<26) | ((CONSOLE_BG_COL>>3)<<21) | ((CONSOLE_BG_COL>>3)<<16) |
	   ((CONSOLE_BG_COL>>3)<<10) | ((CONSOLE_BG_COL>>3)<<5)  |  (CONSOLE_BG_COL>>3));
	break;
    case GDF_16BIT_565RGB:
	fgx = (((CONSOLE_FG_COL>>3)<<27) | ((CONSOLE_FG_COL>>2)<<21) | ((CONSOLE_FG_COL>>3)<<16) |
	   ((CONSOLE_FG_COL>>3)<<11) | ((CONSOLE_FG_COL>>2)<<5)  |  (CONSOLE_FG_COL>>3));
	bgx = (((CONSOLE_BG_COL>>3)<<27) | ((CONSOLE_BG_COL>>2)<<21) | ((CONSOLE_BG_COL>>3)<<16) |
	   ((CONSOLE_BG_COL>>3)<<11) | ((CONSOLE_BG_COL>>2)<<5)  |  (CONSOLE_BG_COL>>3));
	break;
    case GDF_32BIT_X888RGB:
	fgx = (CONSOLE_FG_COL<<16) | (CONSOLE_FG_COL<<8) | CONSOLE_FG_COL;
	bgx = (CONSOLE_BG_COL<<16) | (CONSOLE_BG_COL<<8) | CONSOLE_BG_COL;
	break;
    case GDF_24BIT_888RGB:
	fgx = (CONSOLE_FG_COL<<24) | (CONSOLE_FG_COL<<16) | (CONSOLE_FG_COL<<8) | CONSOLE_FG_COL;
	bgx = (CONSOLE_BG_COL<<24) | (CONSOLE_BG_COL<<16) | (CONSOLE_BG_COL<<8) | CONSOLE_BG_COL;
	break;
    }
    eorx = fgx ^ bgx;

#ifdef CONFIG_VIDEO_LOGO
    /* Plot the logo and get start point of console */
    PRINTD("Video: Drawing the logo ...\n");
    video_console_address = video_logo();
#else
    video_console_address = video_fb_address;
#endif

    /* Initialize the console */
    console_col  = 0;
    console_row  = 0;

    return 0 ;
}


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

int drv_video_init (void)
{
    int skip_dev_init;
    device_t console_dev;
    char *penv;

    skip_dev_init = 0;

     /* Force console i/o to serial ? */
    if ((penv = getenv ("console")) != NULL)
	if (strcmp (penv, "serial") == 0)
	    return 0;

   /* Init video chip - returns with framebuffer cleared */
    if (video_init() == -1)
	skip_dev_init = 1;
#ifdef CONFIG_VGA_AS_SINGLE_DEVICE
   /* Devices VGA and Keyboard will be assigned seperately */
    /* Init vga device */
    if (!skip_dev_init)
    {
	memset (&console_dev, 0, sizeof(console_dev));
	strcpy(console_dev.name, "vga");
	console_dev.ext   = DEV_EXT_VIDEO;    /* Video extensions */
	console_dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_SYSTEM;
	console_dev.putc  = video_putc;        /* 'putc' function */
	console_dev.puts  = video_puts;        /* 'puts' function */
	console_dev.tstc  = NULL;              /* 'tstc' function */
	console_dev.getc  = NULL;              /* 'getc' function */

	if (device_register (&console_dev) == 0)
	    return 1;
    }
#else
    PRINTD("KBD: Keyboard init ...\n");
    if (VIDEO_KBD_INIT_FCT == -1)
	skip_dev_init = 1;

    /* Init console device */
    if (!skip_dev_init)
    {
	memset (&console_dev, 0, sizeof(console_dev));
	strcpy(console_dev.name, "console");
	console_dev.ext   = DEV_EXT_VIDEO;    /* Video extensions */
	console_dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
	console_dev.putc  = video_putc;        /* 'putc' function */
	console_dev.puts  = video_puts;        /* 'puts' function */
	console_dev.tstc  = VIDEO_TSTC_FCT;    /* 'tstc' function */
	console_dev.getc  = VIDEO_GETC_FCT;    /* 'getc' function */

	if (device_register (&console_dev) == 0)
	    return 1;
    }
#endif /* CONFIG_VGA_AS_SINGLE_DEVICE */
    /* No console dev available */
    return 0;
}

#endif /* CONFIG_CFB_CONSOLE */