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u-boot/drivers/video/ct69000.c
Wolfgang Denk 1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files 
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00

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/* ported from ctfb.c (linux kernel):
* Created in Jan - July 2000 by Thomas Höhenleitner <th@visuelle-maschinen.de>
*
* Ported to U-Boot:
* (C) Copyright 2002 Denis Peter, MPL AG Switzerland
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#ifdef CONFIG_VIDEO
#include <pci.h>
#include <video_fb.h>
#include "videomodes.h"
/* debug */
#undef VGA_DEBUG
#undef VGA_DUMP_REG
#ifdef VGA_DEBUG
#undef _DEBUG
#define _DEBUG 1
#else
#undef _DEBUG
#define _DEBUG 0
#endif
/* Macros */
#ifndef min
#define min( a, b ) ( ( a ) < ( b ) ) ? ( a ) : ( b )
#endif
#ifndef max
#define max( a, b ) ( ( a ) > ( b ) ) ? ( a ) : ( b )
#endif
#ifdef minmax
#error "term minmax already used."
#endif
#define minmax( a, x, b ) max( ( a ), min( ( x ), ( b ) ) )
#define N_ELTS( x ) ( sizeof( x ) / sizeof( x[ 0 ] ) )
/* CT Register Offsets */
#define CT_AR_O 0x3c0 /* Index and Data write port of the attribute Registers */
#define CT_GR_O 0x3ce /* Index port of the Graphic Controller Registers */
#define CT_SR_O 0x3c4 /* Index port of the Sequencer Controller */
#define CT_CR_O 0x3d4 /* Index port of the CRT Controller */
#define CT_XR_O 0x3d6 /* Extended Register index */
#define CT_MSR_W_O 0x3c2 /* Misc. Output Register (write only) */
#define CT_LUT_MASK_O 0x3c6 /* Color Palette Mask */
#define CT_LUT_START_O 0x3c8 /* Color Palette Write Mode Index */
#define CT_LUT_RGB_O 0x3c9 /* Color Palette Data Port */
#define CT_STATUS_REG0_O 0x3c2 /* Status Register 0 (read only) */
#define CT_STATUS_REG1_O 0x3da /* Input Status Register 1 (read only) */
#define CT_FP_O 0x3d0 /* Index port of the Flat panel Registers */
#define CT_MR_O 0x3d2 /* Index Port of the Multimedia Extension */
/* defines for the memory mapped registers */
#define BR00_o 0x400000 /* Source and Destination Span Register */
#define BR01_o 0x400004 /* Pattern/Source Expansion Background Color & Transparency Key Register */
#define BR02_o 0x400008 /* Pattern/Source Expansion Foreground Color Register */
#define BR03_o 0x40000C /* Monochrome Source Control Register */
#define BR04_o 0x400010 /* BitBLT Control Register */
#define BR05_o 0x400014 /* Pattern Address Registe */
#define BR06_o 0x400018 /* Source Address Register */
#define BR07_o 0x40001C /* Destination Address Register */
#define BR08_o 0x400020 /* Destination Width & Height Register */
#define BR09_o 0x400024 /* Source Expansion Background Color & Transparency Key Register */
#define BR0A_o 0x400028 /* Source Expansion Foreground Color Register */
#define CURSOR_SIZE 0x1000 /* in KByte for HW Cursor */
#define PATTERN_ADR (pGD->dprBase + CURSOR_SIZE) /* pattern Memory after Cursor Memory */
#define PATTERN_SIZE 8*8*4 /* 4 Bytes per Pixel 8 x 8 Pixel */
#define ACCELMEMORY (CURSOR_SIZE + PATTERN_SIZE) /* reserved Memory for BITBlt and hw cursor */
/* Some Mode definitions */
#define FB_SYNC_HOR_HIGH_ACT 1 /* horizontal sync high active */
#define FB_SYNC_VERT_HIGH_ACT 2 /* vertical sync high active */
#define FB_SYNC_EXT 4 /* external sync */
#define FB_SYNC_COMP_HIGH_ACT 8 /* composite sync high active */
#define FB_SYNC_BROADCAST 16 /* broadcast video timings */
/* vtotal = 144d/288n/576i => PAL */
/* vtotal = 121d/242n/484i => NTSC */
#define FB_SYNC_ON_GREEN 32 /* sync on green */
#define FB_VMODE_NONINTERLACED 0 /* non interlaced */
#define FB_VMODE_INTERLACED 1 /* interlaced */
#define FB_VMODE_DOUBLE 2 /* double scan */
#define FB_VMODE_MASK 255
#define FB_VMODE_YWRAP 256 /* ywrap instead of panning */
#define FB_VMODE_SMOOTH_XPAN 512 /* smooth xpan possible (internally used) */
#define FB_VMODE_CONUPDATE 512 /* don't update x/yoffset */
#define text 0
#define fntwidth 8
/* table for VGA Initialization */
typedef struct {
const unsigned char reg;
const unsigned char val;
} CT_CFG_TABLE;
/* this table provides some basic initialisations such as Memory Clock etc */
static CT_CFG_TABLE xreg[] = {
{0x09, 0x01}, /* CRT Controller Extensions Enable */
{0x0A, 0x02}, /* Frame Buffer Mapping */
{0x0B, 0x01}, /* PCI Write Burst support */
{0x20, 0x00}, /* BitBLT Configuration */
{0x40, 0x03}, /* Memory Access Control */
{0x60, 0x00}, /* Video Pin Control */
{0x61, 0x00}, /* DPMS Synch control */
{0x62, 0x00}, /* GPIO Pin Control */
{0x63, 0xBD}, /* GPIO Pin Data */
{0x67, 0x00}, /* Pin Tri-State */
{0x80, 0x80}, /* Pixel Pipeline Config 0 register */
{0xA0, 0x00}, /* Cursor 1 Control Reg */
{0xA1, 0x00}, /* Cursor 1 Vertical Extension Reg */
{0xA2, 0x00}, /* Cursor 1 Base Address Low */
{0xA3, 0x00}, /* Cursor 1 Base Address High */
{0xA4, 0x00}, /* Cursor 1 X-Position Low */
{0xA5, 0x00}, /* Cursor 1 X-Position High */
{0xA6, 0x00}, /* Cursor 1 Y-Position Low */
{0xA7, 0x00}, /* Cursor 1 Y-Position High */
{0xA8, 0x00}, /* Cursor 2 Control Reg */
{0xA9, 0x00}, /* Cursor 2 Vertical Extension Reg */
{0xAA, 0x00}, /* Cursor 2 Base Address Low */
{0xAB, 0x00}, /* Cursor 2 Base Address High */
{0xAC, 0x00}, /* Cursor 2 X-Position Low */
{0xAD, 0x00}, /* Cursor 2 X-Position High */
{0xAE, 0x00}, /* Cursor 2 Y-Position Low */
{0xAF, 0x00}, /* Cursor 2 Y-Position High */
{0xC0, 0x7D}, /* Dot Clock 0 VCO M-Divisor */
{0xC1, 0x07}, /* Dot Clock 0 VCO N-Divisor */
{0xC3, 0x34}, /* Dot Clock 0 Divisor select */
{0xC4, 0x55}, /* Dot Clock 1 VCO M-Divisor */
{0xC5, 0x09}, /* Dot Clock 1 VCO N-Divisor */
{0xC7, 0x24}, /* Dot Clock 1 Divisor select */
{0xC8, 0x7D}, /* Dot Clock 2 VCO M-Divisor */
{0xC9, 0x07}, /* Dot Clock 2 VCO N-Divisor */
{0xCB, 0x34}, /* Dot Clock 2 Divisor select */
{0xCC, 0x38}, /* Memory Clock 0 VCO M-Divisor */
{0xCD, 0x03}, /* Memory Clock 0 VCO N-Divisor */
{0xCE, 0x90}, /* Memory Clock 0 Divisor select */
{0xCF, 0x06}, /* Clock Config */
{0xD0, 0x0F}, /* Power Down */
{0xD1, 0x01}, /* Power Down BitBLT */
{0xFF, 0xFF} /* end of table */
};
/* Clock Config:
* =============
*
* PD Registers:
* -------------
* Bit2 and Bit4..6 are used for the Loop Divisor and Post Divisor.
* They are encoded as follows:
*
* +---+--------------+
* | 2 | Loop Divisor |
* +---+--------------+
* | 1 | 1 |
* +---+--------------+
* | 0 | 4 |
* +---+--------------+
* Note: The Memory Clock does not have a Loop Divisor.
* +---+---+---+--------------+
* | 6 | 5 | 4 | Post Divisor |
* +---+---+---+--------------+
* | 0 | 0 | 0 | 1 |
* +---+---+---+--------------+
* | 0 | 0 | 1 | 2 |
* +---+---+---+--------------+
* | 0 | 1 | 0 | 4 |
* +---+---+---+--------------+
* | 0 | 1 | 1 | 8 |
* +---+---+---+--------------+
* | 1 | 0 | 0 | 16 |
* +---+---+---+--------------+
* | 1 | 0 | 1 | 32 |
* +---+---+---+--------------+
* | 1 | 1 | X | reserved |
* +---+---+---+--------------+
*
* All other bits are reserved in these registers.
*
* Clock VCO M Registers:
* ----------------------
* These Registers contain the M Value -2.
*
* Clock VCO N Registers:
* ----------------------
* These Registers contain the N Value -2.
*
* Formulas:
* ---------
* Fvco = (Fref * Loop Divisor * M/N), whereas 100MHz < Fvco < 220MHz
* Fout = Fvco / Post Divisor
*
* Dot Clk0 (default 25MHz):
* -------------------------
* Fvco = 14.318 * 127 / 9 = 202.045MHz
* Fout = 202.045MHz / 8 = 25.25MHz
* Post Divisor = 8
* Loop Divisor = 1
* XRC0 = (M - 2) = 125 = 0x7D
* XRC1 = (N - 2) = 7 = 0x07
* XRC3 = 0x34
*
* Dot Clk1 (default 28MHz):
* -------------------------
* Fvco = 14.318 * 87 / 11 = 113.24MHz
* Fout = 113.24MHz / 4 = 28.31MHz
* Post Divisor = 4
* Loop Divisor = 1
* XRC4 = (M - 2) = 85 = 0x55
* XRC5 = (N - 2) = 9 = 0x09
* XRC7 = 0x24
*
* Dot Clk2 (variable for extended modes set to 25MHz):
* ----------------------------------------------------
* Fvco = 14.318 * 127 / 9 = 202.045MHz
* Fout = 202.045MHz / 8 = 25.25MHz
* Post Divisor = 8
* Loop Divisor = 1
* XRC8 = (M - 2) = 125 = 0x7D
* XRC9 = (N - 2) = 7 = 0x07
* XRCB = 0x34
*
* Memory Clk for most modes >50MHz:
* ----------------------------------
* Fvco = 14.318 * 58 / 5 = 166MHz
* Fout = 166MHz / 2 = 83MHz
* Post Divisor = 2
* XRCC = (M - 2) = 57 = 0x38
* XRCD = (N - 2) = 3 = 0x03
* XRCE = 0x90
*
* Note Bit7 enables the clock source from the VCO
*
*/
/*******************************************************************
* Chips struct
*******************************************************************/
struct ctfb_chips_properties {
int device_id; /* PCI Device ID */
unsigned long max_mem; /* memory for frame buffer */
int vld_set; /* value of VLD if bit2 in clock control is set */
int vld_not_set; /* value of VLD if bit2 in clock control is set */
int mn_diff; /* difference between M/N Value + mn_diff = M/N Register */
int mn_min; /* min value of M/N Value */
int mn_max; /* max value of M/N Value */
int vco_min; /* VCO Min in MHz */
int vco_max; /* VCO Max in MHz */
};
static const struct ctfb_chips_properties chips[] = {
{PCI_DEVICE_ID_CT_69000, 0x200000, 1, 4, -2, 3, 257, 100, 220},
#ifdef CONFIG_USE_CPCIDVI
{PCI_DEVICE_ID_CT_69030, 0x400000, 1, 4, -2, 3, 257, 100, 220},
#endif
{PCI_DEVICE_ID_CT_65555, 0x100000, 16, 4, 0, 1, 255, 48, 220}, /* NOT TESTED */
{0, 0, 0, 0, 0, 0, 0, 0, 0} /* Terminator */
};
/*
* The Graphic Device
*/
GraphicDevice ctfb;
/*******************************************************************************
*
* Low Level Routines
*/
/*******************************************************************************
*
* Read CT ISA register
*/
#ifdef VGA_DEBUG
static unsigned char
ctRead (unsigned short index)
{
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
if (index == CT_AR_O)
/* synch the Flip Flop */
in8 (pGD->isaBase + CT_STATUS_REG1_O);
return (in8 (pGD->isaBase + index));
}
#endif
/*******************************************************************************
*
* Write CT ISA register
*/
static void
ctWrite (unsigned short index, unsigned char val)
{
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
out8 ((pGD->isaBase + index), val);
}
/*******************************************************************************
*
* Read CT ISA register indexed
*/
static unsigned char
ctRead_i (unsigned short index, char reg)
{
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
if (index == CT_AR_O)
/* synch the Flip Flop */
in8 (pGD->isaBase + CT_STATUS_REG1_O);
out8 ((pGD->isaBase + index), reg);
return (in8 (pGD->isaBase + index + 1));
}
/*******************************************************************************
*
* Write CT ISA register indexed
*/
static void
ctWrite_i (unsigned short index, char reg, char val)
{
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
if (index == CT_AR_O) {
/* synch the Flip Flop */
in8 (pGD->isaBase + CT_STATUS_REG1_O);
out8 ((pGD->isaBase + index), reg);
out8 ((pGD->isaBase + index), val);
} else {
out8 ((pGD->isaBase + index), reg);
out8 ((pGD->isaBase + index + 1), val);
}
}
/*******************************************************************************
*
* Write a table of CT ISA register
*/
static void
ctLoadRegs (unsigned short index, CT_CFG_TABLE * regTab)
{
while (regTab->reg != 0xFF) {
ctWrite_i (index, regTab->reg, regTab->val);
regTab++;
}
}
/*****************************************************************************/
static void
SetArRegs (void)
{
int i, tmp;
for (i = 0; i < 0x10; i++)
ctWrite_i (CT_AR_O, i, i);
if (text)
tmp = 0x04;
else
tmp = 0x41;
ctWrite_i (CT_AR_O, 0x10, tmp); /* Mode Control Register */
ctWrite_i (CT_AR_O, 0x11, 0x00); /* Overscan Color Register */
ctWrite_i (CT_AR_O, 0x12, 0x0f); /* Memory Plane Enable Register */
if (fntwidth == 9)
tmp = 0x08;
else
tmp = 0x00;
ctWrite_i (CT_AR_O, 0x13, tmp); /* Horizontal Pixel Panning */
ctWrite_i (CT_AR_O, 0x14, 0x00); /* Color Select Register */
ctWrite (CT_AR_O, 0x20); /* enable video */
}
/*****************************************************************************/
static void
SetGrRegs (void)
{ /* Set Graphics Mode */
int i;
for (i = 0; i < 0x05; i++)
ctWrite_i (CT_GR_O, i, 0);
if (text) {
ctWrite_i (CT_GR_O, 0x05, 0x10);
ctWrite_i (CT_GR_O, 0x06, 0x02);
} else {
ctWrite_i (CT_GR_O, 0x05, 0x40);
ctWrite_i (CT_GR_O, 0x06, 0x05);
}
ctWrite_i (CT_GR_O, 0x07, 0x0f);
ctWrite_i (CT_GR_O, 0x08, 0xff);
}
/*****************************************************************************/
static void
SetSrRegs (void)
{
int tmp = 0;
ctWrite_i (CT_SR_O, 0x00, 0x00); /* reset */
/*rr( sr, 0x01, tmp );
if( fntwidth == 8 ) tmp |= 0x01; else tmp &= ~0x01;
wr( sr, 0x01, tmp ); */
if (fntwidth == 8)
ctWrite_i (CT_SR_O, 0x01, 0x01); /* Clocking Mode Register */
else
ctWrite_i (CT_SR_O, 0x01, 0x00); /* Clocking Mode Register */
ctWrite_i (CT_SR_O, 0x02, 0x0f); /* Enable CPU wr access to given memory plane */
ctWrite_i (CT_SR_O, 0x03, 0x00); /* Character Map Select Register */
if (text)
tmp = 0x02;
else
tmp = 0x0e;
ctWrite_i (CT_SR_O, 0x04, tmp); /* Enable CPU accesses to the rest of the 256KB
total VGA memory beyond the first 64KB and set
fb mapping mode. */
ctWrite_i (CT_SR_O, 0x00, 0x03); /* enable */
}
/*****************************************************************************/
static void
SetBitsPerPixelIntoXrRegs (int bpp)
{
unsigned int n = (bpp >> 3), tmp; /* only for 15, 8, 16, 24 bpp */
static char md[4] = { 0x04, 0x02, 0x05, 0x06 }; /* DisplayColorMode */
static char off[4] = { ~0x20, ~0x30, ~0x20, ~0x10 }; /* mask */
static char on[4] = { 0x10, 0x00, 0x10, 0x20 }; /* mask */
if (bpp == 15)
n = 0;
tmp = ctRead_i (CT_XR_O, 0x20);
tmp &= off[n];
tmp |= on[n];
ctWrite_i (CT_XR_O, 0x20, tmp); /* BitBLT Configuration */
ctWrite_i (CT_XR_O, 0x81, md[n]);
}
/*****************************************************************************/
static void
SetCrRegs (struct ctfb_res_modes *var, int bits_per_pixel)
{ /* he -le- ht|0 hd -ri- hs -h- he */
unsigned char cr[0x7a];
int i, tmp;
unsigned int hd, hs, he, ht, hbe; /* Horizontal. */
unsigned int vd, vs, ve, vt; /* vertical */
unsigned int bpp, wd, dblscan, interlaced, bcast, CrtHalfLine;
unsigned int CompSyncCharClkDelay, CompSyncPixelClkDelay;
unsigned int NTSC_PAL_HorizontalPulseWidth, BlDelayCtrl;
unsigned int HorizontalEqualizationPulses;
unsigned int HorizontalSerration1Start, HorizontalSerration2Start;
const int LineCompare = 0x3ff;
unsigned int TextScanLines = 1; /* this is in fact a vertical zoom factor */
unsigned int RAMDAC_BlankPedestalEnable = 0; /* 1=en-, 0=disable, see XR82 */
hd = (var->xres) / 8; /* HDisp. */
hs = (var->xres + var->right_margin) / 8; /* HsStrt */
he = (var->xres + var->right_margin + var->hsync_len) / 8; /* HsEnd */
ht = (var->left_margin + var->xres + var->right_margin + var->hsync_len) / 8; /* HTotal */
hbe = ht - 1; /* HBlankEnable todo docu wants ht here, but it does not work */
/* ve -up- vt|0 vd -lo- vs -v- ve */
vd = var->yres; /* VDisplay */
vs = var->yres + var->lower_margin; /* VSyncStart */
ve = var->yres + var->lower_margin + var->vsync_len; /* VSyncEnd */
vt = var->upper_margin + var->yres + var->lower_margin + var->vsync_len; /* VTotal */
bpp = bits_per_pixel;
dblscan = (var->vmode & FB_VMODE_DOUBLE) ? 1 : 0;
interlaced = var->vmode & FB_VMODE_INTERLACED;
bcast = var->sync & FB_SYNC_BROADCAST;
CrtHalfLine = bcast ? (hd >> 1) : 0;
BlDelayCtrl = bcast ? 1 : 0;
CompSyncCharClkDelay = 0; /* 2 bit */
CompSyncPixelClkDelay = 0; /* 3 bit */
if (bcast) {
NTSC_PAL_HorizontalPulseWidth = 7; /*( var->hsync_len >> 1 ) + 1 */
HorizontalEqualizationPulses = 0; /* inverse value */
HorizontalSerration1Start = 31; /* ( ht >> 1 ) */
HorizontalSerration2Start = 89; /* ( ht >> 1 ) */
} else {
NTSC_PAL_HorizontalPulseWidth = 0;
/* 4 bit: hsync pulse width = ( ( CR74[4:0] - CR74[5] )
* / 2 ) + 1 --> CR74[4:0] = 2*(hs-1) + CR74[5] */
HorizontalEqualizationPulses = 1; /* inverse value */
HorizontalSerration1Start = 0; /* ( ht >> 1 ) */
HorizontalSerration2Start = 0; /* ( ht >> 1 ) */
}
if (bpp == 15)
bpp = 16;
wd = var->xres * bpp / 64; /* double words per line */
if (interlaced) { /* we divide all vertical timings, exept vd */
vs >>= 1;
ve >>= 1;
vt >>= 1;
}
memset (cr, 0, sizeof (cr));
cr[0x00] = 0xff & (ht - 5);
cr[0x01] = hd - 1; /* soll:4f ist 59 */
cr[0x02] = hd;
cr[0x03] = (hbe & 0x1F) | 0x80; /* hd + ht - hd */
cr[0x04] = hs;
cr[0x05] = ((hbe & 0x20) << 2) | (he & 0x1f);
cr[0x06] = (vt - 2) & 0xFF;
cr[0x30] = (vt - 2) >> 8;
cr[0x07] = ((vt & 0x100) >> 8)
| ((vd & 0x100) >> 7)
| ((vs & 0x100) >> 6)
| ((vs & 0x100) >> 5)
| ((LineCompare & 0x100) >> 4)
| ((vt & 0x200) >> 4)
| ((vd & 0x200) >> 3)
| ((vs & 0x200) >> 2);
cr[0x08] = 0x00;
cr[0x09] = (dblscan << 7)
| ((LineCompare & 0x200) >> 3)
| ((vs & 0x200) >> 4)
| (TextScanLines - 1);
cr[0x10] = vs & 0xff; /* VSyncPulseStart */
cr[0x32] = (vs & 0xf00) >> 8; /* VSyncPulseStart */
cr[0x11] = (ve & 0x0f); /* | 0x20; */
cr[0x12] = (vd - 1) & 0xff; /* LineCount */
cr[0x31] = ((vd - 1) & 0xf00) >> 8; /* LineCount */
cr[0x13] = wd & 0xff;
cr[0x41] = (wd & 0xf00) >> 8;
cr[0x15] = vs & 0xff;
cr[0x33] = (vs & 0xf00) >> 8;
cr[0x38] = (0x100 & (ht - 5)) >> 8;
cr[0x3C] = 0xc0 & hbe;
cr[0x16] = (vt - 1) & 0xff; /* vbe - docu wants vt here, */
cr[0x17] = 0xe3; /* but it does not work */
cr[0x18] = 0xff & LineCompare;
cr[0x22] = 0xff; /* todo? */
cr[0x70] = interlaced ? (0x80 | CrtHalfLine) : 0x00; /* check:0xa6 */
cr[0x71] = 0x80 | (RAMDAC_BlankPedestalEnable << 6)
| (BlDelayCtrl << 5)
| ((0x03 & CompSyncCharClkDelay) << 3)
| (0x07 & CompSyncPixelClkDelay); /* todo: see XR82 */
cr[0x72] = HorizontalSerration1Start;
cr[0x73] = HorizontalSerration2Start;
cr[0x74] = (HorizontalEqualizationPulses << 5)
| NTSC_PAL_HorizontalPulseWidth;
/* todo: ct69000 has also 0x75-79 */
/* now set the registers */
for (i = 0; i <= 0x0d; i++) { /*CR00 .. CR0D */
ctWrite_i (CT_CR_O, i, cr[i]);
}
for (i = 0x10; i <= 0x18; i++) { /*CR10 .. CR18 */
ctWrite_i (CT_CR_O, i, cr[i]);
}
i = 0x22; /*CR22 */
ctWrite_i (CT_CR_O, i, cr[i]);
for (i = 0x30; i <= 0x33; i++) { /*CR30 .. CR33 */
ctWrite_i (CT_CR_O, i, cr[i]);
}
i = 0x38; /*CR38 */
ctWrite_i (CT_CR_O, i, cr[i]);
i = 0x3C; /*CR3C */
ctWrite_i (CT_CR_O, i, cr[i]);
for (i = 0x40; i <= 0x41; i++) { /*CR40 .. CR41 */
ctWrite_i (CT_CR_O, i, cr[i]);
}
for (i = 0x70; i <= 0x74; i++) { /*CR70 .. CR74 */
ctWrite_i (CT_CR_O, i, cr[i]);
}
tmp = ctRead_i (CT_CR_O, 0x40);
tmp &= 0x0f;
tmp |= 0x80;
ctWrite_i (CT_CR_O, 0x40, tmp); /* StartAddressEnable */
}
/* pixelclock control */
/*****************************************************************************
We have a rational number p/q and need an m/n which is very close to p/q
but has m and n within mnmin and mnmax. We have no floating point in the
kernel. We can use long long without divide. And we have time to compute...
******************************************************************************/
static unsigned int
FindBestPQFittingMN (unsigned int p, unsigned int q, unsigned int mnmin,
unsigned int mnmax, unsigned int *pm, unsigned int *pn)
{
/* this code is not for general purpose usable but good for our number ranges */
unsigned int n = mnmin, m = 0;
long long int L = 0, P = p, Q = q, H = P >> 1;
long long int D = 0x7ffffffffffffffLL;
for (n = mnmin; n <= mnmax; n++) {
m = mnmin; /* p/q ~ m/n -> p*n ~ m*q -> p*n-x*q ~ 0 */
L = P * n - m * Q; /* n * vco - m * fref should be near 0 */
while (L > 0 && m < mnmax) {
L -= q; /* difference is greater as 0 subtract fref */
m++; /* and increment m */
}
/* difference is less or equal than 0 or m > maximum */
if (m > mnmax)
break; /* no solution: if we increase n we get the same situation */
/* L is <= 0 now */
if (-L > H && m > mnmin) { /* if difference > the half fref */
L += q; /* we take the situation before */
m--; /* because its closer to 0 */
}
L = (L < 0) ? -L : +L; /* absolute value */
if (D < L) /* if last difference was better take next n */
continue;
D = L;
*pm = m;
*pn = n; /* keep improved data */
if (D == 0)
break; /* best result we can get */
}
return (unsigned int) (0xffffffff & D);
}
/* that is the hardware < 69000 we have to manage
+---------+ +-------------------+ +----------------------+ +--+
| REFCLK |__|NTSC Divisor Select|__|FVCO Reference Divisor|__|÷N|__
| 14.3MHz | |(NTSCDS) (÷1, ÷5) | |Select (RDS) (÷1, ÷4) | | | |
+---------+ +-------------------+ +----------------------+ +--+ |
___________________________________________________________________|
|
| fvco fout
| +--------+ +------------+ +-----+ +-------------------+ +----+
+-| Phase |__|Charge Pump |__| VCO |_____|Post Divisor (PD) |___|CLK |--->
+-| Detect | |& Filter VCO| | | | |÷1, 2, 4, 8, 16, 32| | |
| +--------+ +------------+ +-----+ | +-------------------+ +----+
| |
| +--+ +---------------+ |
|____|÷M|___|VCO Loop Divide|__________|
| | |(VLD)(÷4, ÷16) |
+--+ +---------------+
****************************************************************************
that is the hardware >= 69000 we have to manage
+---------+ +--+
| REFCLK |__|÷N|__
| 14.3MHz | | | |
+---------+ +--+ |
__________________|
|
| fvco fout
| +--------+ +------------+ +-----+ +-------------------+ +----+
+-| Phase |__|Charge Pump |__| VCO |_____|Post Divisor (PD) |___|CLK |--->
+-| Detect | |& Filter VCO| | | | |÷1, 2, 4, 8, 16, 32| | |
| +--------+ +------------+ +-----+ | +-------------------+ +----+
| |
| +--+ +---------------+ |
|____|÷M|___|VCO Loop Divide|__________|
| | |(VLD)(÷1, ÷4) |
+--+ +---------------+
*/
#define VIDEO_FREF 14318180; /* Hz */
/*****************************************************************************/
static int
ReadPixClckFromXrRegsBack (struct ctfb_chips_properties *param)
{
unsigned int m, n, vld, pd, PD, fref, xr_cb, i, pixclock;
i = 0;
pixclock = -1;
fref = VIDEO_FREF;
m = ctRead_i (CT_XR_O, 0xc8);
n = ctRead_i (CT_XR_O, 0xc9);
m -= param->mn_diff;
n -= param->mn_diff;
xr_cb = ctRead_i (CT_XR_O, 0xcb);
PD = (0x70 & xr_cb) >> 4;
pd = 1;
for (i = 0; i < PD; i++) {
pd *= 2;
}
vld = (0x04 & xr_cb) ? param->vld_set : param->vld_not_set;
if (n * vld * m) {
unsigned long long p = 1000000000000LL * pd * n;
unsigned long long q = (long long) fref * vld * m;
while ((p > 0xffffffffLL) || (q > 0xffffffffLL)) {
p >>= 1; /* can't divide with long long so we scale down */
q >>= 1;
}
pixclock = (unsigned) p / (unsigned) q;
} else
printf ("Invalid data in xr regs.\n");
return pixclock;
}
/*****************************************************************************/
static void
FindAndSetPllParamIntoXrRegs (unsigned int pixelclock,
struct ctfb_chips_properties *param)
{
unsigned int m, n, vld, pd, PD, fref, xr_cb;
unsigned int fvcomin, fvcomax, pclckmin, pclckmax, pclk;
unsigned int pfreq, fvco, new_pixclock;
unsigned int D,nback,mback;
fref = VIDEO_FREF;
pd = 1;
PD = 0;
fvcomin = param->vco_min;
fvcomax = param->vco_max; /* MHz */
pclckmin = 1000000 / fvcomax + 1; /* 4546 */
pclckmax = 32000000 / fvcomin - 1; /* 666665 */
pclk = minmax (pclckmin, pixelclock, pclckmax); /* ps pp */
pfreq = 250 * (4000000000U / pclk);
fvco = pfreq; /* Hz */
new_pixclock = 0;
while (fvco < fvcomin * 1000000) {
/* double VCO starting with the pixelclock frequency
* as long as it is lower than the minimal VCO frequency */
fvco *= 2;
pd *= 2;
PD++;
}
/* fvco is exactly pd * pixelclock and higher than the ninmal VCO frequency */
/* first try */
vld = param->vld_set;
D=FindBestPQFittingMN (fvco / vld, fref, param->mn_min, param->mn_max, &m, &n); /* rds = 1 */
mback=m;
nback=n;
/* second try */
vld = param->vld_not_set;
if(D<FindBestPQFittingMN (fvco / vld, fref, param->mn_min, param->mn_max, &m, &n)) { /* rds = 1 */
/* first try was better */
m=mback;
n=nback;
vld = param->vld_set;
}
m += param->mn_diff;
n += param->mn_diff;
debug("VCO %d, pd %d, m %d n %d vld %d\n", fvco, pd, m, n, vld);
xr_cb = ((0x7 & PD) << 4) | (vld == param->vld_set ? 0x04 : 0);
/* All four of the registers used for dot clock 2 (XRC8 - XRCB) must be
* written, and in order from XRC8 to XRCB, before the hardware will
* update the synthesizer s settings.
*/
ctWrite_i (CT_XR_O, 0xc8, m);
ctWrite_i (CT_XR_O, 0xc9, n); /* xrca does not exist in CT69000 and CT69030 */
ctWrite_i (CT_XR_O, 0xca, 0); /* because of a hw bug I guess, but we write */
ctWrite_i (CT_XR_O, 0xcb, xr_cb); /* 0 to it for savety */
new_pixclock = ReadPixClckFromXrRegsBack (param);
debug("pixelclock.set = %d, pixelclock.real = %d\n",
pixelclock, new_pixclock);
}
/*****************************************************************************/
static void
SetMsrRegs (struct ctfb_res_modes *mode)
{
unsigned char h_synch_high, v_synch_high;
h_synch_high = (mode->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 0x40; /* horizontal Synch High active */
v_synch_high = (mode->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 0x80; /* vertical Synch High active */
ctWrite (CT_MSR_W_O, (h_synch_high | v_synch_high | 0x29));
/* upper64K==0x20, CLC2select==0x08, RAMenable==0x02!(todo), CGA==0x01
* Selects the upper 64KB page.Bit5=1
* CLK2 (left reserved in standard VGA) Bit3|2=1|0
* Disables CPU access to frame buffer. Bit1=0
* Sets the I/O address decode for ST01, FCR, and all CR registers
* to the 3Dx I/O address range (CGA emulation). Bit0=1
*/
}
/************************************************************************************/
#ifdef VGA_DUMP_REG
static void
ctDispRegs (unsigned short index, int from, int to)
{
unsigned char status;
int i;
for (i = from; i < to; i++) {
status = ctRead_i (index, i);
printf ("%02X: is %02X\n", i, status);
}
}
void
video_dump_reg (void)
{
int i;
printf ("Extended Regs:\n");
ctDispRegs (CT_XR_O, 0, 0xC);
ctDispRegs (CT_XR_O, 0xe, 0xf);
ctDispRegs (CT_XR_O, 0x20, 0x21);
ctDispRegs (CT_XR_O, 0x40, 0x50);
ctDispRegs (CT_XR_O, 0x60, 0x64);
ctDispRegs (CT_XR_O, 0x67, 0x68);
ctDispRegs (CT_XR_O, 0x70, 0x72);
ctDispRegs (CT_XR_O, 0x80, 0x83);
ctDispRegs (CT_XR_O, 0xA0, 0xB0);
ctDispRegs (CT_XR_O, 0xC0, 0xD3);
printf ("Sequencer Regs:\n");
ctDispRegs (CT_SR_O, 0, 0x8);
printf ("Graphic Regs:\n");
ctDispRegs (CT_GR_O, 0, 0x9);
printf ("CRT Regs:\n");
ctDispRegs (CT_CR_O, 0, 0x19);
ctDispRegs (CT_CR_O, 0x22, 0x23);
ctDispRegs (CT_CR_O, 0x30, 0x34);
ctDispRegs (CT_CR_O, 0x38, 0x39);
ctDispRegs (CT_CR_O, 0x3C, 0x3D);
ctDispRegs (CT_CR_O, 0x40, 0x42);
ctDispRegs (CT_CR_O, 0x70, 0x80);
/* don't display the attributes */
}
#endif
#ifdef CONFIG_VIDEO_HW_CURSOR
/***************************************************************
* Set Hardware Cursor in Pixel
*/
void
video_set_hw_cursor (int x, int y)
{
int sig_x = 0, sig_y = 0;
if (x < 0) {
x *= -1;
sig_x = 1;
}
if (y < 0) {
y *= -1;
sig_y = 1;
}
ctWrite_i (CT_XR_O, 0xa4, x & 0xff);
ctWrite_i (CT_XR_O, 0xa5, (x >> 8) & 0x7);
ctWrite_i (CT_XR_O, 0xa6, y & 0xff);
ctWrite_i (CT_XR_O, 0xa7, (y >> 8) & 0x7);
}
/***************************************************************
* Init Hardware Cursor. To know the size of the Cursor,
* we have to know the Font size.
*/
void
video_init_hw_cursor (int font_width, int font_height)
{
unsigned char xr_80;
unsigned long *curs, pattern;
int i;
int cursor_start;
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
cursor_start = pGD->dprBase;
xr_80 = ctRead_i (CT_XR_O, 0x80);
/* set start address */
ctWrite_i (CT_XR_O, 0xa2, (cursor_start >> 8) & 0xf0);
ctWrite_i (CT_XR_O, 0xa3, (cursor_start >> 16) & 0x3f);
/* set cursor shape */
curs = (unsigned long *) cursor_start;
i = 0;
while (i < 0x400) {
curs[i++] = 0xffffffff; /* AND mask */
curs[i++] = 0xffffffff; /* AND mask */
curs[i++] = 0; /* XOR mask */
curs[i++] = 0; /* XOR mask */
/* Transparent */
}
pattern = 0xffffffff >> font_width;
i = 0;
while (i < (font_height * 2)) {
curs[i++] = pattern; /* AND mask */
curs[i++] = pattern; /* AND mask */
curs[i++] = 0; /* XOR mask */
curs[i++] = 0; /* XOR mask */
/* Cursor Color 0 */
}
/* set blink rate */
ctWrite_i (CT_FP_O, 0x19, 0xf);
/* set cursors colors */
xr_80 = ctRead_i (CT_XR_O, 0x80);
xr_80 |= 0x1; /* alternate palette select */
ctWrite_i (CT_XR_O, 0x80, xr_80);
video_set_lut (4, CONSOLE_FG_COL, CONSOLE_FG_COL, CONSOLE_FG_COL);
/* position 4 is color 0 cursor 0 */
xr_80 &= 0xfe; /* normal palette select */
ctWrite_i (CT_XR_O, 0x80, xr_80);
/* cursor enable */
ctWrite_i (CT_XR_O, 0xa0, 0x91);
xr_80 |= 0x10; /* enable hwcursor */
ctWrite_i (CT_XR_O, 0x80, xr_80);
video_set_hw_cursor (0, 0);
}
#endif /* CONFIG_VIDEO_HW_CURSOR */
/***************************************************************
* Wait for BitBlt ready
*/
static int
video_wait_bitblt (unsigned long addr)
{
unsigned long br04;
int i = 0;
br04 = in32r (addr);
while (br04 & 0x80000000) {
udelay (1);
br04 = in32r (addr);
if (i++ > 1000000) {
printf ("ERROR Timeout %lx\n", br04);
return 1;
}
}
return 0;
}
/***************************************************************
* Set up BitBlt Registrs
*/
static void
SetDrawingEngine (int bits_per_pixel)
{
unsigned long br04, br00;
unsigned char tmp;
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
tmp = ctRead_i (CT_XR_O, 0x20); /* BitBLT Configuration */
tmp |= 0x02; /* reset BitBLT */
ctWrite_i (CT_XR_O, 0x20, tmp); /* BitBLT Configuration */
udelay (10);
tmp &= 0xfd; /* release reset BitBLT */
ctWrite_i (CT_XR_O, 0x20, tmp); /* BitBLT Configuration */
video_wait_bitblt (pGD->pciBase + BR04_o);
/* set pattern Address */
out32r (pGD->pciBase + BR05_o, PATTERN_ADR & 0x003ffff8);
br04 = 0;
if (bits_per_pixel == 1) {
br04 |= 0x00040000; /* monochome Pattern */
br04 |= 0x00001000; /* monochome source */
}
br00 = ((pGD->winSizeX * pGD->gdfBytesPP) << 16) + (pGD->winSizeX * pGD->gdfBytesPP); /* bytes per scanline */
out32r (pGD->pciBase + BR00_o, br00); /* */
out32r (pGD->pciBase + BR08_o, (10 << 16) + 10); /* dummy */
out32r (pGD->pciBase + BR04_o, br04); /* write all 0 */
out32r (pGD->pciBase + BR07_o, 0); /* destination */
video_wait_bitblt (pGD->pciBase + BR04_o);
}
/****************************************************************************
* supported Video Chips
*/
static struct pci_device_id supported[] = {
{PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_69000},
#ifdef CONFIG_USE_CPCIDVI
{PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_69030},
#endif
{}
};
/*******************************************************************************
*
* Init video chip
*/
void *
video_hw_init (void)
{
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
unsigned short device_id;
pci_dev_t devbusfn;
int videomode;
unsigned long t1, hsynch, vsynch;
unsigned int pci_mem_base, *vm;
int tmp, i, bits_per_pixel;
char *penv;
struct ctfb_res_modes *res_mode;
struct ctfb_res_modes var_mode;
struct ctfb_chips_properties *chips_param;
/* Search for video chip */
if ((devbusfn = pci_find_devices (supported, 0)) < 0) {
#ifdef CONFIG_VIDEO_ONBOARD
printf ("Video: Controller not found !\n");
#endif
return (NULL);
}
/* PCI setup */
pci_write_config_dword (devbusfn, PCI_COMMAND,
(PCI_COMMAND_MEMORY | PCI_COMMAND_IO));
pci_read_config_word (devbusfn, PCI_DEVICE_ID, &device_id);
pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0, &pci_mem_base);
pci_mem_base = pci_mem_to_phys (devbusfn, pci_mem_base);
/* get chips params */
for (chips_param = (struct ctfb_chips_properties *) &chips[0];
chips_param->device_id != 0; chips_param++) {
if (chips_param->device_id == device_id)
break;
}
if (chips_param->device_id == 0) {
#ifdef CONFIG_VIDEO_ONBOARD
printf ("Video: controller 0x%X not supported\n", device_id);
#endif
return NULL;
}
/* supported Video controller found */
printf ("Video: ");
tmp = 0;
videomode = 0x301;
/* get video mode via environment */
if ((penv = getenv ("videomode")) != NULL) {
/* deceide if it is a string */
if (penv[0] <= '9') {
videomode = (int) simple_strtoul (penv, NULL, 16);
tmp = 1;
}
} else {
tmp = 1;
}
if (tmp) {
/* parameter are vesa modes */
/* search params */
for (i = 0; i < VESA_MODES_COUNT; i++) {
if (vesa_modes[i].vesanr == videomode)
break;
}
if (i == VESA_MODES_COUNT) {
printf ("no VESA Mode found, switching to mode 0x301 ");
i = 0;
}
res_mode =
(struct ctfb_res_modes *) &res_mode_init[vesa_modes[i].
resindex];
bits_per_pixel = vesa_modes[i].bits_per_pixel;
} else {
res_mode = (struct ctfb_res_modes *) &var_mode;
bits_per_pixel = video_get_params (res_mode, penv);
}
/* calculate available color depth for controller memory */
if (bits_per_pixel == 15)
tmp = 2;
else
tmp = bits_per_pixel >> 3; /* /8 */
if (((chips_param->max_mem -
ACCELMEMORY) / (res_mode->xres * res_mode->yres)) < tmp) {
tmp =
((chips_param->max_mem -
ACCELMEMORY) / (res_mode->xres * res_mode->yres));
if (tmp == 0) {
printf
("No matching videomode found .-> reduce resolution\n");
return NULL;
} else {
printf ("Switching back to %d Bits per Pixel ",
tmp << 3);
bits_per_pixel = tmp << 3;
}
}
/* calculate hsynch and vsynch freq (info only) */
t1 = (res_mode->left_margin + res_mode->xres +
res_mode->right_margin + res_mode->hsync_len) / 8;
t1 *= 8;
t1 *= res_mode->pixclock;
t1 /= 1000;
hsynch = 1000000000L / t1;
t1 *=
(res_mode->upper_margin + res_mode->yres +
res_mode->lower_margin + res_mode->vsync_len);
t1 /= 1000;
vsynch = 1000000000L / t1;
/* fill in Graphic device struct */
sprintf (pGD->modeIdent, "%dx%dx%d %ldkHz %ldHz", res_mode->xres,
res_mode->yres, bits_per_pixel, (hsynch / 1000),
(vsynch / 1000));
printf ("%s\n", pGD->modeIdent);
pGD->winSizeX = res_mode->xres;
pGD->winSizeY = res_mode->yres;
pGD->plnSizeX = res_mode->xres;
pGD->plnSizeY = res_mode->yres;
switch (bits_per_pixel) {
case 8:
pGD->gdfBytesPP = 1;
pGD->gdfIndex = GDF__8BIT_INDEX;
break;
case 15:
pGD->gdfBytesPP = 2;
pGD->gdfIndex = GDF_15BIT_555RGB;
break;
case 16:
pGD->gdfBytesPP = 2;
pGD->gdfIndex = GDF_16BIT_565RGB;
break;
case 24:
pGD->gdfBytesPP = 3;
pGD->gdfIndex = GDF_24BIT_888RGB;
break;
}
pGD->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
pGD->pciBase = pci_mem_base;
pGD->frameAdrs = pci_mem_base;
pGD->memSize = chips_param->max_mem;
/* Cursor Start Address */
pGD->dprBase =
(pGD->winSizeX * pGD->winSizeY * pGD->gdfBytesPP) + pci_mem_base;
if ((pGD->dprBase & 0x0fff) != 0) {
/* allign it */
pGD->dprBase &= 0xfffff000;
pGD->dprBase += 0x00001000;
}
debug("Cursor Start %x Pattern Start %x\n", pGD->dprBase,
PATTERN_ADR);
pGD->vprBase = pci_mem_base; /* Dummy */
pGD->cprBase = pci_mem_base; /* Dummy */
/* set up Hardware */
#ifdef CONFIG_USE_CPCIDVI
if (device_id == PCI_DEVICE_ID_CT_69030) {
ctWrite (CT_MSR_W_O, 0x0b);
ctWrite (0x3cd, 0x13);
ctWrite_i (CT_FP_O, 0x02, 0x00);
ctWrite_i (CT_FP_O, 0x05, 0x00);
ctWrite_i (CT_FP_O, 0x06, 0x00);
ctWrite (0x3c2, 0x0b);
ctWrite_i (CT_FP_O, 0x02, 0x10);
ctWrite_i (CT_FP_O, 0x01, 0x09);
} else {
ctWrite (CT_MSR_W_O, 0x01);
}
#else
ctWrite (CT_MSR_W_O, 0x01);
#endif
/* set the extended Registers */
ctLoadRegs (CT_XR_O, xreg);
/* set atribute registers */
SetArRegs ();
/* set Graphics register */
SetGrRegs ();
/* set sequencer */
SetSrRegs ();
/* set msr */
SetMsrRegs (res_mode);
/* set CRT Registers */
SetCrRegs (res_mode, bits_per_pixel);
/* set color mode */
SetBitsPerPixelIntoXrRegs (bits_per_pixel);
/* set PLL */
FindAndSetPllParamIntoXrRegs (res_mode->pixclock, chips_param);
ctWrite_i (CT_SR_O, 0, 0x03); /* clear synchronous reset */
/* Clear video memory */
i = pGD->memSize / 4;
vm = (unsigned int *) pGD->pciBase;
while (i--)
*vm++ = 0;
SetDrawingEngine (bits_per_pixel);
#ifdef VGA_DUMP_REG
video_dump_reg ();
#endif
return ((void *) &ctfb);
}
/*******************************************************************************
*
* Set a RGB color in the LUT (8 bit index)
*/
void
video_set_lut (unsigned int index, /* color number */
unsigned char r, /* red */
unsigned char g, /* green */
unsigned char b /* blue */
)
{
ctWrite (CT_LUT_MASK_O, 0xff);
ctWrite (CT_LUT_START_O, (char) index);
ctWrite (CT_LUT_RGB_O, r); /* red */
ctWrite (CT_LUT_RGB_O, g); /* green */
ctWrite (CT_LUT_RGB_O, b); /* blue */
udelay (1);
ctWrite (CT_LUT_MASK_O, 0xff);
}
/*******************************************************************************
*
* Drawing engine fill on screen region
*/
void
video_hw_rectfill (unsigned int bpp, /* bytes per pixel */
unsigned int dst_x, /* dest pos x */
unsigned int dst_y, /* dest pos y */
unsigned int dim_x, /* frame width */
unsigned int dim_y, /* frame height */
unsigned int color /* fill color */
)
{
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
unsigned long *p, br04;
video_wait_bitblt (pGD->pciBase + BR04_o);
p = (unsigned long *) PATTERN_ADR;
dim_x *= bpp;
if (bpp == 3)
bpp++; /* 24Bit needs a 32bit pattern */
memset (p, color, (bpp * sizeof (unsigned char) * 8 * 8)); /* 8 x 8 pattern data */
out32r (pGD->pciBase + BR07_o, ((pGD->winSizeX * dst_y) + dst_x) * pGD->gdfBytesPP); /* destination */
br04 = in32r (pGD->pciBase + BR04_o) & 0xffffff00;
br04 |= 0xF0; /* write Pattern P -> D */
out32r (pGD->pciBase + BR04_o, br04); /* */
out32r (pGD->pciBase + BR08_o, (dim_y << 16) + dim_x); /* starts the BITBlt */
video_wait_bitblt (pGD->pciBase + BR04_o);
}
/*******************************************************************************
*
* Drawing engine bitblt with screen region
*/
void
video_hw_bitblt (unsigned int bpp, /* bytes per pixel */
unsigned int src_x, /* source pos x */
unsigned int src_y, /* source pos y */
unsigned int dst_x, /* dest pos x */
unsigned int dst_y, /* dest pos y */
unsigned int dim_x, /* frame width */
unsigned int dim_y /* frame height */
)
{
GraphicDevice *pGD = (GraphicDevice *) & ctfb;
unsigned long br04;
br04 = in32r (pGD->pciBase + BR04_o);
/* to prevent data corruption due to overlap, we have to
* find out if, and how the frames overlaps */
if (src_x < dst_x) {
/* src is more left than dest
* the frame may overlap -> start from right to left */
br04 |= 0x00000100; /* set bit 8 */
src_x += dim_x;
dst_x += dim_x;
} else {
br04 &= 0xfffffeff; /* clear bit 8 left to right */
}
if (src_y < dst_y) {
/* src is higher than dst
* the frame may overlap => start from bottom */
br04 |= 0x00000200; /* set bit 9 */
src_y += dim_y;
dst_y += dim_y;
} else {
br04 &= 0xfffffdff; /* clear bit 9 top to bottom */
}
dim_x *= bpp;
out32r (pGD->pciBase + BR06_o, ((pGD->winSizeX * src_y) + src_x) * pGD->gdfBytesPP); /* source */
out32r (pGD->pciBase + BR07_o, ((pGD->winSizeX * dst_y) + dst_x) * pGD->gdfBytesPP); /* destination */
br04 &= 0xffffff00;
br04 |= 0x000000CC; /* S -> D */
out32r (pGD->pciBase + BR04_o, br04); /* */
out32r (pGD->pciBase + BR08_o, (dim_y << 16) + dim_x); /* start the BITBlt */
video_wait_bitblt (pGD->pciBase + BR04_o);
}
#endif /* CONFIG_VIDEO */
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