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u-boot/arch/powerpc/cpu/mpc8xx/video.c
Stefan Roese a47a12becf Move arch/ppc to arch/powerpc 
As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>
2010-04-21 23:42:38 +02:00

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/*
* (C) Copyright 2000
* Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
* (C) Copyright 2002
* Wolfgang Denk, wd@denx.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
*/
/* #define DEBUG */
/************************************************************************/
/* ** HEADER FILES */
/************************************************************************/
#include <stdarg.h>
#include <common.h>
#include <config.h>
#include <version.h>
#include <timestamp.h>
#include <i2c.h>
#include <linux/types.h>
#include <stdio_dev.h>
#ifdef CONFIG_VIDEO
DECLARE_GLOBAL_DATA_PTR;
/************************************************************************/
/* ** DEBUG SETTINGS */
/************************************************************************/
#if 0
#define VIDEO_DEBUG_COLORBARS /* Force colorbars output */
#endif
/************************************************************************/
/* ** VIDEO MODE SETTINGS */
/************************************************************************/
#if 0
#define VIDEO_MODE_EXTENDED /* Allow screen size bigger than visible area */
#define VIDEO_MODE_NTSC
#endif
#define VIDEO_MODE_PAL
#if 0
#define VIDEO_BLINK /* This enables cursor blinking (under construction) */
#endif
#define VIDEO_INFO /* Show U-Boot information */
#define VIDEO_INFO_X VIDEO_LOGO_WIDTH+8
#define VIDEO_INFO_Y 16
/************************************************************************/
/* ** VIDEO ENCODER CONSTANTS */
/************************************************************************/
#ifdef CONFIG_VIDEO_ENCODER_AD7176
#include <video_ad7176.h> /* Sets encoder data, mode, and visible and active area */
#define VIDEO_I2C 1
#define VIDEO_I2C_ADDR CONFIG_VIDEO_ENCODER_AD7176_ADDR
#endif
#ifdef CONFIG_VIDEO_ENCODER_AD7177
#include <video_ad7177.h> /* Sets encoder data, mode, and visible and active area */
#define VIDEO_I2C 1
#define VIDEO_I2C_ADDR CONFIG_VIDEO_ENCODER_AD7177_ADDR
#endif
#ifdef CONFIG_VIDEO_ENCODER_AD7179
#include <video_ad7179.h> /* Sets encoder data, mode, and visible and active area */
#define VIDEO_I2C 1
#define VIDEO_I2C_ADDR CONFIG_VIDEO_ENCODER_AD7179_ADDR
#endif
/************************************************************************/
/* ** VIDEO MODE CONSTANTS */
/************************************************************************/
#ifdef VIDEO_MODE_EXTENDED
#define VIDEO_COLS VIDEO_ACTIVE_COLS
#define VIDEO_ROWS VIDEO_ACTIVE_ROWS
#else
#define VIDEO_COLS VIDEO_VISIBLE_COLS
#define VIDEO_ROWS VIDEO_VISIBLE_ROWS
#endif
#define VIDEO_PIXEL_SIZE (VIDEO_MODE_BPP/8)
#define VIDEO_SIZE (VIDEO_ROWS*VIDEO_COLS*VIDEO_PIXEL_SIZE) /* Total size of buffer */
#define VIDEO_PIX_BLOCKS (VIDEO_SIZE >> 2) /* Number of ints */
#define VIDEO_LINE_LEN (VIDEO_COLS*VIDEO_PIXEL_SIZE) /* Number of bytes per line */
#define VIDEO_BURST_LEN (VIDEO_COLS/8)
#ifdef VIDEO_MODE_YUYV
#define VIDEO_BG_COL 0x80D880D8 /* Background color in YUYV format */
#else
#define VIDEO_BG_COL 0xF8F8F8F8 /* Background color in RGB format */
#endif
/************************************************************************/
/* ** FONT AND LOGO DATA */
/************************************************************************/
#include <video_font.h> /* Get font data, width and height */
#ifdef CONFIG_VIDEO_LOGO
#include <video_logo.h> /* Get logo data, width and height */
#define VIDEO_LOGO_WIDTH DEF_U_BOOT_LOGO_WIDTH
#define VIDEO_LOGO_HEIGHT DEF_U_BOOT_LOGO_HEIGHT
#define VIDEO_LOGO_ADDR &u_boot_logo
#endif
/************************************************************************/
/* ** VIDEO CONTROLLER CONSTANTS */
/************************************************************************/
/* VCCR - VIDEO CONTROLLER CONFIGURATION REGISTER */
#define VIDEO_VCCR_VON 0 /* Video controller ON */
#define VIDEO_VCCR_CSRC 1 /* Clock source */
#define VIDEO_VCCR_PDF 13 /* Pixel display format */
#define VIDEO_VCCR_IEN 11 /* Interrupt enable */
/* VSR - VIDEO STATUS REGISTER */
#define VIDEO_VSR_CAS 6 /* Active set */
#define VIDEO_VSR_EOF 0 /* End of frame */
/* VCMR - VIDEO COMMAND REGISTER */
#define VIDEO_VCMR_BD 0 /* Blank display */
#define VIDEO_VCMR_ASEL 1 /* Active set selection */
/* VBCB - VIDEO BACKGROUND COLOR BUFFER REGISTER */
#define VIDEO_BCSR4_RESET_BIT 21 /* BCSR4 - Extern video encoder reset */
#define VIDEO_BCSR4_EXTCLK_BIT 22 /* BCSR4 - Extern clock enable */
#define VIDEO_BCSR4_VIDLED_BIT 23 /* BCSR4 - Video led disable */
/************************************************************************/
/* ** CONSOLE CONSTANTS */
/************************************************************************/
#ifdef CONFIG_VIDEO_LOGO
#define CONSOLE_ROWS ((VIDEO_ROWS - VIDEO_LOGO_HEIGHT) / VIDEO_FONT_HEIGHT)
#define VIDEO_LOGO_SKIP (VIDEO_COLS - VIDEO_LOGO_WIDTH)
#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)
/*
* Simple color definitions
*/
#define CONSOLE_COLOR_BLACK 0
#define CONSOLE_COLOR_RED 1
#define CONSOLE_COLOR_GREEN 2
#define CONSOLE_COLOR_YELLOW 3
#define CONSOLE_COLOR_BLUE 4
#define CONSOLE_COLOR_MAGENTA 5
#define CONSOLE_COLOR_CYAN 6
#define CONSOLE_COLOR_GREY 13
#define CONSOLE_COLOR_GREY2 14
#define CONSOLE_COLOR_WHITE 15 /* Must remain last / highest */
/************************************************************************/
/* ** BITOPS MACROS */
/************************************************************************/
#define HISHORT(i) ((i >> 16)&0xffff)
#define LOSHORT(i) (i & 0xffff)
#define HICHAR(s) ((i >> 8)&0xff)
#define LOCHAR(s) (i & 0xff)
#define HI(c) ((c >> 4)&0xf)
#define LO(c) (c & 0xf)
#define SWAPINT(i) (HISHORT(i) | (LOSHORT(i) << 16))
#define SWAPSHORT(s) (HICHAR(s) | (LOCHAR(s) << 8))
#define SWAPCHAR(c) (HI(c) | (LO(c) << 4))
#define BITMASK(b) (1 << (b))
#define GETBIT(v,b) (((v) & BITMASK(b)) > 0)
#define SETBIT(v,b,d) (v = (((d)>0) ? (v) | BITMASK(b): (v) & ~BITMASK(b)))
/************************************************************************/
/* ** STRUCTURES */
/************************************************************************/
typedef struct {
unsigned char V, Y1, U, Y2;
} tYUYV;
/* This structure is based on the Video Ram in the MPC823. */
typedef struct VRAM {
unsigned hx:2, /* Horizontal sync */
vx:2, /* Vertical sync */
fx:2, /* Frame */
bx:2, /* Blank */
res1:6, /* Reserved */
vds:2, /* Video Data Select */
inter:1, /* Interrupt */
res2:2, /* Reserved */
lcyc:11, /* Loop/video cycles */
lp:1, /* Loop start/end */
lst:1; /* Last entry */
} VRAM;
/************************************************************************/
/* ** VARIABLES */
/************************************************************************/
static int
video_panning_range_x = 0, /* Video mode invisible pixels x range */
video_panning_range_y = 0, /* Video mode invisible pixels y range */
video_panning_value_x = 0, /* Video mode x panning value (absolute) */
video_panning_value_y = 0, /* Video mode y panning value (absolute) */
video_panning_factor_x = 0, /* Video mode x panning value (-127 +127) */
video_panning_factor_y = 0, /* Video mode y panning value (-127 +127) */
console_col = 0, /* Cursor col */
console_row = 0, /* Cursor row */
video_palette[16]; /* Our palette */
static const int video_font_draw_table[] =
{ 0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff };
static char
video_color_fg = 0, /* Current fg color index (0-15) */
video_color_bg = 0, /* Current bg color index (0-15) */
video_enable = 0; /* Video has been initialized? */
static void
*video_fb_address, /* Frame buffer address */
*video_console_address; /* Console frame buffer start address */
/************************************************************************/
/* ** MEMORY FUNCTIONS (32bit) */
/************************************************************************/
static void memsetl (int *p, int c, int v)
{
while (c--)
*(p++) = v;
}
static void memcpyl (int *d, int *s, int c)
{
while (c--)
*(d++) = *(s++);
}
/************************************************************************/
/* ** VIDEO DRAWING AND COLOR FUNCTIONS */
/************************************************************************/
static int video_maprgb (int r, int g, int b)
{
#ifdef VIDEO_MODE_YUYV
unsigned int pR, pG, pB;
tYUYV YUYV;
unsigned int *ret = (unsigned int *) &YUYV;
/* Transform (0-255) components to (0-100) */
pR = r * 100 / 255;
pG = g * 100 / 255;
pB = b * 100 / 255;
/* Calculate YUV values (0-255) from RGB beetween 0-100 */
YUYV.Y1 = YUYV.Y2 = 209 * (pR + pG + pB) / 300 + 16;
YUYV.U = pR - (pG * 3 / 4) - (pB / 4) + 128;
YUYV.V = pB - (pR / 4) - (pG * 3 / 4) + 128;
return *ret;
#endif
#ifdef VIDEO_MODE_RGB
return ((r >> 3) << 11) | ((g > 2) << 6) | (b >> 3);
#endif
}
static void video_setpalette (int color, int r, int g, int b)
{
color &= 0xf;
video_palette[color] = video_maprgb (r, g, b);
/* Swap values if our panning offset is odd */
if (video_panning_value_x & 1)
video_palette[color] = SWAPINT (video_palette[color]);
}
static void video_fill (int color)
{
memsetl (video_fb_address, VIDEO_PIX_BLOCKS, color);
}
static void video_setfgcolor (int i)
{
video_color_fg = i & 0xf;
}
static void video_setbgcolor (int i)
{
video_color_bg = i & 0xf;
}
static int video_pickcolor (int i)
{
return video_palette[i & 0xf];
}
/* Absolute console plotting functions */
#ifdef VIDEO_BLINK
static void video_revchar (int xx, int yy)
{
int rows;
u8 *dest;
dest = video_fb_address + yy * VIDEO_LINE_LEN + xx * 2;
for (rows = VIDEO_FONT_HEIGHT; rows--; dest += VIDEO_LINE_LEN) {
switch (VIDEO_FONT_WIDTH) {
case 16:
((u32 *) dest)[6] ^= 0xffffffff;
((u32 *) dest)[7] ^= 0xffffffff;
/* FALL THROUGH */
case 12:
((u32 *) dest)[4] ^= 0xffffffff;
((u32 *) dest)[5] ^= 0xffffffff;
/* FALL THROUGH */
case 8:
((u32 *) dest)[2] ^= 0xffffffff;
((u32 *) dest)[3] ^= 0xffffffff;
/* FALL THROUGH */
case 4:
((u32 *) dest)[0] ^= 0xffffffff;
((u32 *) dest)[1] ^= 0xffffffff;
}
}
}
#endif
static void video_drawchars (int xx, int yy, unsigned char *s, int count)
{
u8 *cdat, *dest, *dest0;
int rows, offset, c;
u32 eorx, fgx, bgx;
offset = yy * VIDEO_LINE_LEN + xx * 2;
dest0 = video_fb_address + offset;
fgx = video_pickcolor (video_color_fg);
bgx = video_pickcolor (video_color_bg);
if (xx & 1) {
fgx = SWAPINT (fgx);
bgx = SWAPINT (bgx);
}
eorx = fgx ^ bgx;
switch (VIDEO_FONT_WIDTH) {
case 4:
case 8:
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_table[bits >> 6] & eorx) ^ bgx;
((u32 *) dest)[1] =
(video_font_draw_table[bits >> 4 & 3] & eorx) ^ bgx;
if (VIDEO_FONT_WIDTH == 8) {
((u32 *) dest)[2] =
(video_font_draw_table[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *) dest)[3] =
(video_font_draw_table[bits & 3] & eorx) ^ bgx;
}
}
dest0 += VIDEO_FONT_WIDTH * 2;
s++;
}
break;
case 12:
case 16:
while (count--) {
cdat = video_fontdata + (*s) * (VIDEO_FONT_HEIGHT << 1);
for (rows = VIDEO_FONT_HEIGHT, dest = dest0; rows--;
dest += VIDEO_LINE_LEN) {
u8 bits = *cdat++;
((u32 *) dest)[0] =
(video_font_draw_table[bits >> 6] & eorx) ^ bgx;
((u32 *) dest)[1] =
(video_font_draw_table[bits >> 4 & 3] & eorx) ^ bgx;
((u32 *) dest)[2] =
(video_font_draw_table[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *) dest)[3] =
(video_font_draw_table[bits & 3] & eorx) ^ bgx;
bits = *cdat++;
((u32 *) dest)[4] =
(video_font_draw_table[bits >> 6] & eorx) ^ bgx;
((u32 *) dest)[5] =
(video_font_draw_table[bits >> 4 & 3] & eorx) ^ bgx;
if (VIDEO_FONT_WIDTH == 16) {
((u32 *) dest)[6] =
(video_font_draw_table[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *) dest)[7] =
(video_font_draw_table[bits & 3] & eorx) ^ bgx;
}
}
s++;
dest0 += VIDEO_FONT_WIDTH * 2;
}
break;
}
}
static inline void video_drawstring (int xx, int yy, char *s)
{
video_drawchars (xx, yy, (unsigned char *)s, strlen (s));
}
/* Relative to console plotting functions */
static void video_putchars (int xx, int yy, unsigned char *s, int count)
{
#ifdef CONFIG_VIDEO_LOGO
video_drawchars (xx, yy + VIDEO_LOGO_HEIGHT, s, count);
#else
video_drawchars (xx, yy, s, count);
#endif
}
static void video_putchar (int xx, int yy, unsigned char c)
{
#ifdef CONFIG_VIDEO_LOGO
video_drawchars (xx, yy + VIDEO_LOGO_HEIGHT, &c, 1);
#else
video_drawchars (xx, yy, &c, 1);
#endif
}
static inline void video_putstring (int xx, int yy, unsigned char *s)
{
video_putchars (xx, yy, (unsigned char *)s, strlen ((char *)s));
}
/************************************************************************/
/* ** VIDEO CONTROLLER LOW-LEVEL FUNCTIONS */
/************************************************************************/
#if !defined(CONFIG_RRVISION)
static void video_mode_dupefield (VRAM * source, VRAM * dest, int entries)
{
int i;
for (i = 0; i < entries; i++) {
dest[i] = source[i]; /* Copy the entire record */
dest[i].fx = (!dest[i].fx) * 3; /* Negate field bit */
}
dest[0].lcyc++; /* Add a cycle to the first entry */
dest[entries - 1].lst = 1; /* Set end of ram entries */
}
#endif
static void inline video_mode_addentry (VRAM * vr,
int Hx, int Vx, int Fx, int Bx,
int VDS, int INT, int LCYC, int LP, int LST)
{
vr->hx = Hx;
vr->vx = Vx;
vr->fx = Fx;
vr->bx = Bx;
vr->vds = VDS;
vr->inter = INT;
vr->lcyc = LCYC;
vr->lp = LP;
vr->lst = LST;
}
#define ADDENTRY(a,b,c,d,e,f,g,h,i) video_mode_addentry(&vr[entry++],a,b,c,d,e,f,g,h,i)
static int video_mode_generate (void)
{
immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
VRAM *vr = (VRAM *) (((void *) immap) + 0xb00); /* Pointer to the VRAM table */
int DX, X1, X2, DY, Y1, Y2, entry = 0, fifo;
/* CHECKING PARAMETERS */
if (video_panning_factor_y < -128)
video_panning_factor_y = -128;
if (video_panning_factor_y > 128)
video_panning_factor_y = 128;
if (video_panning_factor_x < -128)
video_panning_factor_x = -128;
if (video_panning_factor_x > 128)
video_panning_factor_x = 128;
/* Setting panning */
DX = video_panning_range_x = (VIDEO_ACTIVE_COLS - VIDEO_COLS) * 2;
DY = video_panning_range_y = (VIDEO_ACTIVE_ROWS - VIDEO_ROWS) / 2;
video_panning_value_x = (video_panning_factor_x + 128) * DX / 256;
video_panning_value_y = (video_panning_factor_y + 128) * DY / 256;
/* We assume these are burst units (multiplied by 2, we need it pari) */
X1 = video_panning_value_x & 0xfffe;
X2 = DX - X1;
/* We assume these are field line units (divided by 2, we need it pari) */
Y1 = video_panning_value_y & 0xfffe;
Y2 = DY - Y1;
debug("X1=%d, X2=%d, Y1=%d, Y2=%d, DX=%d, DY=%d VIDEO_COLS=%d \n",
X1, X2, Y1, Y2, DX, DY, VIDEO_COLS);
#ifdef VIDEO_MODE_NTSC
/*
* Hx Vx Fx Bx VDS INT LCYC LP LST
*
* Retrace blanking
*/
ADDENTRY (0, 0, 3, 0, 1, 0, 3, 1, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 243, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 1440, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 32, 1, 0);
/*
* Vertical blanking
*/
ADDENTRY (0, 0, 0, 0, 1, 0, 18, 1, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 243, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 1440, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 32, 1, 0);
/*
* Odd field active area (TOP)
*/
if (Y1 > 0) {
ADDENTRY (0, 0, 0, 0, 1, 0, Y1, 1, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 235, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, 1448, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 32, 1, 0);
}
/*
* Odd field active area
*/
ADDENTRY (0, 0, 0, 0, 1, 0, 240 - DY, 1, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 235, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, 8 + X1, 0, 0);
ADDENTRY (3, 0, 0, 3, 0, 0, VIDEO_COLS * 2, 0, 0);
if (X2 > 0)
ADDENTRY (3, 0, 0, 3, 1, 0, X2, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 32, 1, 0);
/*
* Odd field active area (BOTTOM)
*/
if (Y1 > 0) {
ADDENTRY (0, 0, 0, 0, 1, 0, Y2, 1, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 235, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, 1448, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 32, 1, 0);
}
/*
* Vertical blanking
*/
ADDENTRY (0, 0, 0, 0, 1, 0, 4, 1, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 243, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 1440, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 32, 1, 0);
/*
* Vertical blanking
*/
ADDENTRY (0, 0, 3, 0, 1, 0, 19, 1, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 243, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 1440, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 32, 1, 0);
/*
* Even field active area (TOP)
*/
if (Y1 > 0) {
ADDENTRY (0, 0, 3, 0, 1, 0, Y1, 1, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 235, 0, 0);
ADDENTRY (3, 0, 3, 3, 1, 0, 1448, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 32, 1, 0);
}
/*
* Even field active area (CENTER)
*/
ADDENTRY (0, 0, 3, 0, 1, 0, 240 - DY, 1, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 235, 0, 0);
ADDENTRY (3, 0, 3, 3, 1, 0, 8 + X1, 0, 0);
ADDENTRY (3, 0, 3, 3, 0, 0, VIDEO_COLS * 2, 0, 0);
if (X2 > 0)
ADDENTRY (3, 0, 3, 3, 1, 0, X2, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 32, 1, 0);
/*
* Even field active area (BOTTOM)
*/
if (Y1 > 0) {
ADDENTRY (0, 0, 3, 0, 1, 0, Y2, 1, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 235, 0, 0);
ADDENTRY (3, 0, 3, 3, 1, 0, 1448, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 32, 1, 0);
}
/*
* Vertical blanking
*/
ADDENTRY (0, 0, 3, 0, 1, 0, 1, 1, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 243, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 0, 1440, 0, 0);
ADDENTRY (3, 0, 3, 0, 1, 1, 32, 1, 1);
#endif
#ifdef VIDEO_MODE_PAL
#if defined(CONFIG_RRVISION)
#define HPW 160 /* horizontal pulse width (was 139) */
#define VPW 2 /* vertical pulse width */
#define HBP 104 /* horizontal back porch (was 112) */
#define VBP 19 /* vertical back porch (was 19) */
#define VID_R 240 /* number of rows */
debug ("[VIDEO CTRL] Starting to add controller entries...");
/*
* Even field
*/
ADDENTRY (0, 3, 0, 3, 1, 0, 2, 0, 0);
ADDENTRY (0, 0, 0, 3, 1, 0, HPW, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, HBP + (VIDEO_COLS * 2) + 72, 0, 0);
ADDENTRY (0, 0, 0, 3, 1, 0, VPW, 1, 0);
ADDENTRY (0, 0, 0, 3, 1, 0, HPW-1, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, HBP + (VIDEO_COLS * 2) + 72, 1, 0);
ADDENTRY (0, 3, 0, 3, 1, 0, VBP, 1, 0);
ADDENTRY (0, 3, 0, 3, 1, 0, HPW-1, 0, 0);
ADDENTRY (3, 3, 0, 3, 1, 0, HBP + (VIDEO_COLS * 2) + 72, 1, 0);
/*
* Active area
*/
ADDENTRY (0, 3, 0, 3, 1, 0, VID_R , 1, 0);
ADDENTRY (0, 3, 0, 3, 1, 0, HPW-1, 0, 0);
ADDENTRY (3, 3, 0, 3, 1, 0, HBP, 0, 0);
ADDENTRY (3, 3, 0, 3, 0, 0, VIDEO_COLS*2, 0, 0);
ADDENTRY (3, 3, 0, 3, 1, 0, 72, 1, 1);
ADDENTRY (0, 3, 0, 3, 1, 0, 51, 1, 0);
ADDENTRY (0, 3, 0, 3, 1, 0, HPW-1, 0, 0);
ADDENTRY (3, 3, 0, 3, 1, 0, HBP +(VIDEO_COLS * 2) + 72 , 1, 0);
/*
* Odd field
*/
ADDENTRY (0, 3, 0, 3, 1, 0, 2, 0, 0);
ADDENTRY (0, 0, 0, 3, 1, 0, HPW, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, HBP + (VIDEO_COLS * 2) + 72, 0, 0);
ADDENTRY (0, 0, 0, 3, 1, 0, VPW+1, 1, 0);
ADDENTRY (0, 0, 0, 3, 1, 0, HPW-1, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, HBP + (VIDEO_COLS * 2) + 72, 1, 0);
ADDENTRY (0, 3, 0, 3, 1, 0, VBP, 1, 0);
ADDENTRY (0, 3, 0, 3, 1, 0, HPW-1, 0, 0);
ADDENTRY (3, 3, 0, 3, 1, 0, HBP + (VIDEO_COLS * 2) + 72, 1, 0);
/*
* Active area
*/
ADDENTRY (0, 3, 0, 3, 1, 0, VID_R , 1, 0);
ADDENTRY (0, 3, 0, 3, 1, 0, HPW-1, 0, 0);
ADDENTRY (3, 3, 0, 3, 1, 0, HBP, 0, 0);
ADDENTRY (3, 3, 0, 3, 0, 0, VIDEO_COLS*2, 0, 0);
ADDENTRY (3, 3, 0, 3, 1, 0, 72, 1, 1);
ADDENTRY (0, 3, 0, 3, 1, 0, 51, 1, 0);
ADDENTRY (0, 3, 0, 3, 1, 0, HPW-1, 0, 0);
ADDENTRY (3, 3, 0, 3, 1, 0, HBP +(VIDEO_COLS * 2) + 72 , 1, 0);
debug ("done\n");
#else /* !CONFIG_RRVISION */
/*
* Hx Vx Fx Bx VDS INT LCYC LP LST
*
* vertical; blanking
*/
ADDENTRY (0, 0, 0, 0, 1, 0, 22, 1, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 263, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 1440, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 24, 1, 0);
/*
* active area (TOP)
*/
if (Y1 > 0) {
ADDENTRY (0, 0, 0, 0, 1, 0, Y1, 1, 0); /* 11? */
ADDENTRY (3, 0, 0, 0, 1, 0, 255, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, 1448, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 24, 1, 0);
}
/*
* field active area (CENTER)
*/
ADDENTRY (0, 0, 0, 0, 1, 0, 288 - DY, 1, 0); /* 265? */
ADDENTRY (3, 0, 0, 0, 1, 0, 255, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, 8 + X1, 0, 0);
ADDENTRY (3, 0, 0, 3, 0, 0, VIDEO_COLS * 2, 0, 0);
if (X2 > 0)
ADDENTRY (3, 0, 0, 1, 1, 0, X2, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 24, 1, 0);
/*
* field active area (BOTTOM)
*/
if (Y2 > 0) {
ADDENTRY (0, 0, 0, 0, 1, 0, Y2, 1, 0); /* 12? */
ADDENTRY (3, 0, 0, 0, 1, 0, 255, 0, 0);
ADDENTRY (3, 0, 0, 3, 1, 0, 1448, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 24, 1, 0);
}
/*
* field vertical; blanking
*/
ADDENTRY (0, 0, 0, 0, 1, 0, 2, 1, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 263, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 1440, 0, 0);
ADDENTRY (3, 0, 0, 0, 1, 0, 24, 1, 0);
/*
* Create the other field (like this, but whit other field selected,
* one more cycle loop and a last identifier)
*/
video_mode_dupefield (vr, &vr[entry], entry);
#endif /* CONFIG_RRVISION */
#endif /* VIDEO_MODE_PAL */
/* See what FIFO are we using */
fifo = GETBIT (immap->im_vid.vid_vsr, VIDEO_VSR_CAS);
/* Set number of lines and burst (only one frame for now) */
if (fifo) {
immap->im_vid.vid_vfcr0 = VIDEO_BURST_LEN |
(VIDEO_BURST_LEN << 8) | ((VIDEO_ROWS / 2) << 19);
} else {
immap->im_vid.vid_vfcr1 = VIDEO_BURST_LEN |
(VIDEO_BURST_LEN << 8) | ((VIDEO_ROWS / 2) << 19);
}
SETBIT (immap->im_vid.vid_vcmr, VIDEO_VCMR_ASEL, !fifo);
/*
* Wait until changes are applied (not done)
* while (GETBIT(immap->im_vid.vid_vsr, VIDEO_VSR_CAS) == fifo) ;
*/
/* Return number of VRAM entries */
return entry * 2;
}
static void video_encoder_init (void)
{
#ifdef VIDEO_I2C
int rc;
/* Initialize the I2C */
debug ("[VIDEO ENCODER] Initializing I2C bus...\n");
i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#ifdef CONFIG_FADS
/* Reset ADV7176 chip */
debug ("[VIDEO ENCODER] Resetting encoder...\n");
(*(int *) BCSR4) &= ~(1 << 21);
/* Wait for 5 ms inside the reset */
debug ("[VIDEO ENCODER] Waiting for encoder reset...\n");
udelay (5000);
/* Take ADV7176 out of reset */
(*(int *) BCSR4) |= 1 << 21;
/* Wait for 5 ms after the reset */
udelay (5000);
#endif /* CONFIG_FADS */
/* Send configuration */
#ifdef DEBUG
{
int i;
puts ("[VIDEO ENCODER] Configuring the encoder...\n");
printf ("Sending %zu bytes (@ %08lX) to I2C 0x%lX:\n ",
sizeof(video_encoder_data),
(ulong)video_encoder_data,
(ulong)VIDEO_I2C_ADDR);
for (i=0; i<sizeof(video_encoder_data); ++i) {
printf(" %02X", video_encoder_data[i]);
}
putc ('\n');
}
#endif /* DEBUG */
if ((rc = i2c_write (VIDEO_I2C_ADDR, 0, 1,
video_encoder_data,
sizeof(video_encoder_data))) != 0) {
printf ("i2c_send error: rc=%d\n", rc);
return;
}
#endif /* VIDEO_I2C */
return;
}
static void video_ctrl_init (void *memptr)
{
immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
video_fb_address = memptr;
/* Set background */
debug ("[VIDEO CTRL] Setting background color...\n");
immap->im_vid.vid_vbcb = VIDEO_BG_COL;
/* Show the background */
debug ("[VIDEO CTRL] Forcing background...\n");
SETBIT (immap->im_vid.vid_vcmr, VIDEO_VCMR_BD, 1);
/* Turn off video controller */
debug ("[VIDEO CTRL] Turning off video controller...\n");
SETBIT (immap->im_vid.vid_vccr, VIDEO_VCCR_VON, 0);
#ifdef CONFIG_FADS
/* Turn on Video Port LED */
debug ("[VIDEO CTRL] Turning off video port led...\n");
SETBIT (*(int *) BCSR4, VIDEO_BCSR4_VIDLED_BIT, 1);
/* Disable internal clock */
debug ("[VIDEO CTRL] Disabling internal clock...\n");
SETBIT (*(int *) BCSR4, VIDEO_BCSR4_EXTCLK_BIT, 0);
#endif
/* Generate and make active a new video mode */
debug ("[VIDEO CTRL] Generating video mode...\n");
video_mode_generate ();
/* Start of frame buffer (even and odd frame, to make it working with */
/* any selected active set) */
debug ("[VIDEO CTRL] Setting frame buffer address...\n");
immap->im_vid.vid_vfaa1 =
immap->im_vid.vid_vfaa0 = (u32) video_fb_address;
immap->im_vid.vid_vfba1 =
immap->im_vid.vid_vfba0 =
(u32) video_fb_address + VIDEO_LINE_LEN;
/* YUV, Big endian, SHIFT/CLK/CLK input (BEFORE ENABLING 27MHZ EXT CLOCK) */
debug ("[VIDEO CTRL] Setting pixel mode and clocks...\n");
immap->im_vid.vid_vccr = 0x2042;
/* Configure port pins */
debug ("[VIDEO CTRL] Configuring input/output pins...\n");
immap->im_ioport.iop_pdpar = 0x1fff;
immap->im_ioport.iop_pddir = 0x0000;
#ifdef CONFIG_FADS
/* Turn on Video Port Clock - ONLY AFTER SET VCCR TO ENABLE EXTERNAL CLOCK */
debug ("[VIDEO CTRL] Turning on video clock...\n");
SETBIT (*(int *) BCSR4, VIDEO_BCSR4_EXTCLK_BIT, 1);
/* Turn on Video Port LED */
debug ("[VIDEO CTRL] Turning on video port led...\n");
SETBIT (*(int *) BCSR4, VIDEO_BCSR4_VIDLED_BIT, 0);
#endif
#ifdef CONFIG_RRVISION
debug ("PC5->Output(1): enable PAL clock");
immap->im_ioport.iop_pcpar &= ~(0x0400);
immap->im_ioport.iop_pcdir |= 0x0400 ;
immap->im_ioport.iop_pcdat |= 0x0400 ;
debug ("PDPAR=0x%04X PDDIR=0x%04X PDDAT=0x%04X\n",
immap->im_ioport.iop_pdpar,
immap->im_ioport.iop_pddir,
immap->im_ioport.iop_pddat);
debug ("PCPAR=0x%04X PCDIR=0x%04X PCDAT=0x%04X\n",
immap->im_ioport.iop_pcpar,
immap->im_ioport.iop_pcdir,
immap->im_ioport.iop_pcdat);
#endif /* CONFIG_RRVISION */
/* Blanking the screen. */
debug ("[VIDEO CTRL] Blanking the screen...\n");
video_fill (VIDEO_BG_COL);
/*
* Turns on Aggressive Mode. Normally, turning on the caches
* will cause the screen to flicker when the caches try to
* fill. This gives the FIFO's for the Video Controller
* higher priority and prevents flickering because of
* underrun. This may still be an issue when using FLASH,
* since accessing data from Flash is so slow.
*/
debug ("[VIDEO CTRL] Turning on aggressive mode...\n");
immap->im_siu_conf.sc_sdcr = 0x40;
/* Turn on video controller */
debug ("[VIDEO CTRL] Turning on video controller...\n");
SETBIT (immap->im_vid.vid_vccr, VIDEO_VCCR_VON, 1);
/* Show the display */
debug ("[VIDEO CTRL] Enabling the video...\n");
SETBIT (immap->im_vid.vid_vcmr, VIDEO_VCMR_BD, 0);
}
/************************************************************************/
/* ** CONSOLE FUNCTIONS */
/************************************************************************/
static void console_scrollup (void)
{
/* Copy up rows ignoring the first one */
memcpyl (CONSOLE_ROW_FIRST, CONSOLE_ROW_SECOND, CONSOLE_SCROLL_SIZE >> 2);
/* Clear the last one */
memsetl (CONSOLE_ROW_LAST, CONSOLE_ROW_SIZE >> 2, VIDEO_BG_COL);
}
static inline void console_back (void)
{
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 inline void console_newline (void)
{
console_row++;
console_col = 0;
/* Check if we need to scroll the terminal */
if (console_row >= CONSOLE_ROWS) {
/* Scroll everything up */
console_scrollup ();
/* Decrement row number */
console_row--;
}
}
void video_putc (const char c)
{
if (!video_enable) {
serial_putc (c);
return;
}
switch (c) {
case 13: /* Simply ignore this */
break;
case '\n': /* Next line, please */
console_newline ();
break;
case 9: /* Tab (8 chars alignment) */
console_col |= 0x0008; /* Next 8 chars boundary */
console_col &= ~0x0007; /* Set this bit to zero */
if (console_col >= CONSOLE_COLS)
console_newline ();
break;
case 8: /* Eat last character */
console_back ();
break;
default: /* Add to the console */
video_putchar ( console_col * VIDEO_FONT_WIDTH,
console_row * VIDEO_FONT_HEIGHT, c);
console_col++;
/* Check if we need to go to next row */
if (console_col >= CONSOLE_COLS)
console_newline ();
}
}
void video_puts (const char *s)
{
int count = strlen (s);
if (!video_enable)
while (count--)
serial_putc (*s++);
else
while (count--)
video_putc (*s++);
}
/************************************************************************/
/* ** CURSOR BLINKING FUNCTIONS */
/************************************************************************/
#ifdef VIDEO_BLINK
#define BLINK_TIMER_ID 0
#define BLINK_TIMER_HZ 2
static unsigned char blink_enabled = 0;
static timer_t blink_timer;
static void blink_update (void)
{
static int blink_row = -1, blink_col = -1, blink_old = 0;
/* Check if we have a new position to invert */
if ((console_row != blink_row) || (console_col != blink_col)) {
/* Check if we need to reverse last character */
if (blink_old)
video_revchar ( blink_col * VIDEO_FONT_WIDTH,
(blink_row
#ifdef CONFIG_VIDEO_LOGO
+ VIDEO_LOGO_HEIGHT
#endif
) * VIDEO_FONT_HEIGHT);
/* Update values */
blink_row = console_row;
blink_col = console_col;
blink_old = 0;
}
/* Reverse this character */
blink_old = !blink_old;
video_revchar ( console_col * VIDEO_FONT_WIDTH,
(console_row
#ifdef CONFIG_VIDEO_LOGO
+ VIDEO_LOGO_HEIGHT
#endif
) * VIDEO_FONT_HEIGHT);
}
/*
* Handler for blinking cursor
*/
static void blink_handler (void *arg)
{
/* Blink */
blink_update ();
/* Ack the timer */
timer_ack (&blink_timer);
}
int blink_set (int blink)
{
int ret = blink_enabled;
if (blink)
timer_enable (&blink_timer);
else
timer_disable (&blink_timer);
blink_enabled = blink;
return ret;
}
static inline void blink_close (void)
{
timer_close (&blink_timer);
}
static inline void blink_init (void)
{
timer_init (&blink_timer,
BLINK_TIMER_ID, BLINK_TIMER_HZ,
blink_handler);
}
#endif
/************************************************************************/
/* ** LOGO PLOTTING FUNCTIONS */
/************************************************************************/
#ifdef CONFIG_VIDEO_LOGO
void easylogo_plot (fastimage_t * image, void *screen, int width, int x,
int y)
{
int skip = width - image->width, xcount, ycount = image->height;
#ifdef VIDEO_MODE_YUYV
ushort *source = (ushort *) image->data;
ushort *dest = (ushort *) screen + y * width + x;
while (ycount--) {
xcount = image->width;
while (xcount--)
*dest++ = *source++;
dest += skip;
}
#endif
#ifdef VIDEO_MODE_RGB
unsigned char
*source = (unsigned short *) image->data,
*dest = (unsigned short *) screen + ((y * width) + x) * 3;
while (ycount--) {
xcount = image->width * 3;
memcpy (dest, source, xcount);
source += xcount;
dest += ycount;
}
#endif
}
static void *video_logo (void)
{
u16 *screen = video_fb_address, width = VIDEO_COLS;
#ifdef VIDEO_INFO
# ifndef CONFIG_FADS
char temp[32];
# endif
char info[80];
#endif /* VIDEO_INFO */
easylogo_plot (VIDEO_LOGO_ADDR, screen, width, 0, 0);
#ifdef VIDEO_INFO
sprintf (info, "%s (%s - %s) ",
U_BOOT_VERSION, U_BOOT_DATE, U_BOOT_TIME);
video_drawstring (VIDEO_INFO_X, VIDEO_INFO_Y, info);
sprintf (info, "(C) 2002 DENX Software Engineering");
video_drawstring (VIDEO_INFO_X, VIDEO_INFO_Y + VIDEO_FONT_HEIGHT,
info);
sprintf (info, " Wolfgang DENK, wd@denx.de");
video_drawstring (VIDEO_INFO_X, VIDEO_INFO_Y + VIDEO_FONT_HEIGHT * 2,
info);
#ifndef CONFIG_FADS /* all normal boards */
/* leave one blank line */
sprintf (info, "MPC823 CPU at %s MHz, %ld MB RAM, %ld MB Flash",
strmhz(temp, gd->cpu_clk),
gd->ram_size >> 20,
gd->bd->bi_flashsize >> 20 );
video_drawstring (VIDEO_INFO_X, VIDEO_INFO_Y + VIDEO_FONT_HEIGHT * 4,
info);
#else /* FADS :-( */
sprintf (info, "MPC823 CPU at 50 MHz on FADS823 board");
video_drawstring (VIDEO_INFO_X, VIDEO_INFO_Y + VIDEO_FONT_HEIGHT,
info);
sprintf (info, "2MB FLASH - 8MB DRAM - 4MB SRAM");
video_drawstring (VIDEO_INFO_X, VIDEO_INFO_Y + VIDEO_FONT_HEIGHT * 2,
info);
#endif
#endif
return video_fb_address + VIDEO_LOGO_HEIGHT * VIDEO_LINE_LEN;
}
#endif
/************************************************************************/
/* ** VIDEO HIGH-LEVEL FUNCTIONS */
/************************************************************************/
static int video_init (void *videobase)
{
/* Initialize the encoder */
debug ("[VIDEO] Initializing video encoder...\n");
video_encoder_init ();
/* Initialize the video controller */
debug ("[VIDEO] Initializing video controller at %08x...\n",
(int) videobase);
video_ctrl_init (videobase);
/* Setting the palette */
video_setpalette (CONSOLE_COLOR_BLACK, 0, 0, 0);
video_setpalette (CONSOLE_COLOR_RED, 0xFF, 0, 0);
video_setpalette (CONSOLE_COLOR_GREEN, 0, 0xFF, 0);
video_setpalette (CONSOLE_COLOR_YELLOW, 0xFF, 0xFF, 0);
video_setpalette (CONSOLE_COLOR_BLUE, 0, 0, 0xFF);
video_setpalette (CONSOLE_COLOR_MAGENTA, 0xFF, 0, 0xFF);
video_setpalette (CONSOLE_COLOR_CYAN, 0, 0xFF, 0xFF);
video_setpalette (CONSOLE_COLOR_GREY, 0xAA, 0xAA, 0xAA);
video_setpalette (CONSOLE_COLOR_GREY2, 0xF8, 0xF8, 0xF8);
video_setpalette (CONSOLE_COLOR_WHITE, 0xFF, 0xFF, 0xFF);
#ifndef CONFIG_SYS_WHITE_ON_BLACK
video_setfgcolor (CONSOLE_COLOR_BLACK);
video_setbgcolor (CONSOLE_COLOR_GREY2);
#else
video_setfgcolor (CONSOLE_COLOR_GREY2);
video_setbgcolor (CONSOLE_COLOR_BLACK);
#endif /* CONFIG_SYS_WHITE_ON_BLACK */
#ifdef CONFIG_VIDEO_LOGO
/* Paint the logo and retrieve tv base address */
debug ("[VIDEO] Drawing the logo...\n");
video_console_address = video_logo ();
#else
video_console_address = video_fb_address;
#endif
#ifdef VIDEO_BLINK
/* Enable the blinking (under construction) */
blink_init ();
blink_set (0); /* To Fix! */
#endif
/* Initialize the console */
console_col = 0;
console_row = 0;
video_enable = 1;
#ifdef VIDEO_MODE_PAL
# define VIDEO_MODE_TMP1 "PAL"
#endif
#ifdef VIDEO_MODE_NTSC
# define VIDEO_MODE_TMP1 "NTSC"
#endif
#ifdef VIDEO_MODE_YUYV
# define VIDEO_MODE_TMP2 "YCbYCr"
#endif
#ifdef VIDEO_MODE_RGB
# define VIDEO_MODE_TMP2 "RGB"
#endif
debug ( VIDEO_MODE_TMP1
" %dx%dx%d (" VIDEO_MODE_TMP2 ") on %s - console %dx%d\n",
VIDEO_COLS, VIDEO_ROWS, VIDEO_MODE_BPP,
VIDEO_ENCODER_NAME, CONSOLE_COLS, CONSOLE_ROWS);
return 0;
}
int drv_video_init (void)
{
int error, devices = 1;
struct stdio_dev videodev;
video_init ((void *)(gd->fb_base)); /* Video initialization */
/* Device initialization */
memset (&videodev, 0, sizeof (videodev));
strcpy (videodev.name, "video");
videodev.ext = DEV_EXT_VIDEO; /* Video extensions */
videodev.flags = DEV_FLAGS_OUTPUT; /* Output only */
videodev.putc = video_putc; /* 'putc' function */
videodev.puts = video_puts; /* 'puts' function */
error = stdio_register (&videodev);
return (error == 0) ? devices : error;
}
/************************************************************************/
/* ** ROM capable initialization part - needed to reserve FB memory */
/************************************************************************/
/*
* This is called early in the system initialization to grab memory
* for the video controller.
* Returns new address for monitor, after reserving video buffer memory
*
* Note that this is running from ROM, so no write access to global data.
*/
ulong video_setmem (ulong addr)
{
/* Allocate pages for the frame buffer. */
addr -= VIDEO_SIZE;
debug ("Reserving %dk for Video Framebuffer at: %08lx\n",
VIDEO_SIZE>>10, addr);
return (addr);
}
#endif
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