ref: f7a16b5e2cc38aed7985b0144bb2655d14ea6f5a
dir: /sys/src/cmd/aux/vga/mga4xx.c/
/* Philippe Anel <philippe.anel@noos.fr>
- 2001-08-12 : First release.
- 2001-08-15 : Added G450, with source code "adapted from" from Xfree86 4.1.0
- 2001-08-23 : Added 'palettedepth 8' and a few 'ultradebug' ...
- 2001-08-24 : Removed a possible lock in initialization.
- 2001-08-30 : Hey ! The 32 bits mode is PALETIZED (Gamma Control I presume) !
And it seems plan9 assume the frame buffer is organized in
Big Endian format ! (+ Fix for the palette init. )
- 2001-09-06 : Added Full 2D Accel ! (see drivers in /sys/src/9/pc)
- 2001-10-01 : Rid Fix.
- 2006-04-01 : Add MGA550 support.
- 2006-08-07 : Add support for 16 and 24bits modes.
HW accel now works for the G200 cards too (see kernel).
by Leonardo Valencia <leoval@anixcorp.com>
Greets and Acknowledgements go to :
- Sylvain Chipaux <a.k.a. asle>.
- Nigel Roles.
- Jean Mehat (the man who introduced me into the world of plan9).
- Nicolas Stojanovic.
... and for those who wrote plan9 of course ... :)
*/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
static int ultradebug = 0;
/*
* Matrox G4xx 3D graphics accelerators
*/
enum {
Kilo = 1024,
Meg = 1024*1024,
MATROX = 0x102B, /* pci chip manufacturer */
MGA550 = 0x2527, /* pci chip device ids */
MGA4XX = 0x0525,
MGA200 = 0x0521,
/* Pci configuration space mapping */
PCfgMgaFBAA = 0x10, /* Frame buffer Aperture Address */
PCfgMgaCAA = 0x14, /* Control Aperture Address base */
PCfgMgaIAA = 0x18, /* ILOAD Aperture base Address */
PCfgMgaOption1 = 0x40, /* Option Register 1 */
PCfgMgaOption2 = 0x50, /* Option Register 2 */
PCfgMgaOption3 = 0x54, /* Option Register 3 */
PCfgMgaDevCtrl = 0x04, /* Device Control */
/* control aperture offsets */
DMAWIN = 0x0000, /* 7KByte Pseudo-DMA Window */
STATUS0 = 0x1FC2, /* Input Status 0 */
STATUS1 = 0x1FDA, /* Input Status 1 */
SEQIDX = 0x1FC4, /* Sequencer Index */
SEQDATA = 0x1FC5, /* Sequencer Data */
MISC_W = 0x1FC2, /* Misc. WO */
MISC_R = 0x1FCC, /* Misc. RO */
GCTLIDX = 0x1FCE, /* Graphic Controler Index */
GCTLDATA = 0x1FCF, /* Graphic Controler Data */
CRTCIDX = 0x1FD4, /* CRTC Index */
CRTCDATA = 0x1FD5, /* CRTC Data */
CRTCEXTIDX = 0x1FDE, /* CRTC Extension Index */
CRTCEXTDATA = 0x1FDF, /* CRTC Extension Data */
RAMDACIDX = 0x3C00, /* RAMDAC registers Index */
RAMDACDATA = 0x3C0A, /* RAMDAC Indexed Data */
RAMDACPALDATA = 0x3C01,
ATTRIDX = 0x1FC0, /* Attribute Index */
ATTRDATA = 0x1FC1, /* Attribute Data */
CACHEFLUSH = 0x1FFF,
C2_CTL = 0X3C10,
MGA_STATUS = 0X1E14,
Z_DEPTH_ORG = 0X1C0C,
/* ... */
Seq_ClockingMode = 0x01,
Dotmode = (1<<0),
Shftldrt = (1<<2),
Dotclkrt = (1<<3),
Shiftfour = (1<<4),
Scroff = (1<<5),
CrtcExt_Horizontcount = 0x01,
Htotal = (1<<0),
Hblkstr = (1<<1),
Hsyncstr = (1<<2),
Hrsten = (1<<3),
Hsyncoff = (1<<4),
Vsyncoff = (1<<5),
Hblkend = (1<<6),
Vrsten = (1<<7),
CrtcExt_Miscellaneous = 0x03,
Mgamode = (1<<7),
Dac_Xpixclkctrl = 0x1a,
Pixclksl = (3<<0),
Pixclkdis = (1<<2),
Pixpllpdn = (1<<3),
Dac_Xpixpllstat = 0x4f,
Pixlock = (1<<6),
Dac_Xpixpllan = 0x45,
Dac_Xpixpllbn = 0x49,
Dac_Xpixpllcn = 0x4d,
Dac_Xpixpllam = 0x44,
Dac_Xpixpllbm = 0x48,
Dac_Xpixpllcm = 0x4c,
Dac_Xpixpllap = 0x46,
Dac_Xpixpllbp = 0x4a,
Dac_Xpixpllcp = 0x4e,
Dac_Xmulctrl = 0x19,
ColorDepth = (7<<0),
_8bitsPerPixel = 0,
_15bitsPerPixel = 1,
_16bitsPerPixel = 2,
_24bitsPerPixel = 3,
_32bitsPerPixelWithOv = 4,
_32bitsPerPixel = 7,
Dac_Xpanelmode = 0x1f,
Dac_Xmiscctrl = 0x1e,
Dacpdn = (1<<0),
Mfcsel = (3<<1),
Vga8dac = (1<<3),
Ramcs = (1<<4),
Vdoutsel = (7<<5),
Dac_Xcurctrl = 0x06,
CursorDis = 0,
Cursor3Color = 1,
CursorXGA = 2,
CursorX11 = 3,
Cursor16Color = 4,
Dac_Xzoomctrl = 0x38,
Misc_loaddsel = (1<<0),
Misc_rammapen = (1<<1),
Misc_clksel = (3<<2),
Misc_videodis = (1<<4),
Misc_hpgoddev = (1<<5),
Misc_hsyncpol = (1<<6),
Misc_vsyncpol = (1<<7),
MNP_TABLE_SIZE = 64,
TRUE = (1 == 1),
FALSE = (1 == 0),
};
typedef struct {
Pcidev* pci;
int devid;
int revid;
uchar* mmio;
uchar* mmfb;
int fbsize;
ulong iload;
uchar syspll_m;
uchar syspll_n;
uchar syspll_p;
uchar syspll_s;
uchar pixpll_m;
uchar pixpll_n;
uchar pixpll_p;
uchar pixpll_s;
ulong option1;
ulong option2;
ulong option3;
ulong Fneeded;
/* From plan9.ini ... later */
uchar sdram;
uchar colorkey;
uchar maskkey;
ulong maxpclk;
uchar graphics[9];
uchar attribute[0x14];
uchar sequencer[5];
uchar crtc[0x19];
uchar crtcext[9];
ulong htotal;
ulong hdispend;
ulong hblkstr;
ulong hblkend;
ulong hsyncstr;
ulong hsyncend;
ulong vtotal;
ulong vdispend;
ulong vblkstr;
ulong vblkend;
ulong vsyncstr;
ulong vsyncend;
ulong linecomp;
ulong hsyncsel;
ulong startadd;
ulong offset;
ulong maxscan;
ulong curloc;
ulong prowscan;
ulong currowstr;
ulong currowend;
ulong curoff;
ulong undrow;
ulong curskew;
ulong conv2t4;
ulong interlace;
ulong hsyncdel;
ulong hdispskew;
ulong bytepan;
ulong dotclkrt;
ulong dword;
ulong wbmode;
ulong addwrap;
ulong selrowscan;
ulong cms;
ulong csynccen;
ulong hrsten;
ulong vrsten;
ulong vinten;
ulong vintclr;
ulong hsyncoff;
ulong vsyncoff;
ulong crtcrstN;
ulong mgamode;
ulong scale;
ulong hiprilvl;
ulong maxhipri;
ulong c2hiprilvl;
ulong c2maxhipri;
ulong misc;
ulong crtcprotect;
ulong winsize;
ulong winfreq;
ulong mgaapsize;
} Mga;
static void
mgawrite32(Mga* mga, int index, ulong val)
{
((ulong*)mga->mmio)[index] = val;
}
static ulong
mgaread32(Mga* mga, int index)
{
return ((ulong*)mga->mmio)[index];
}
static void
mgawrite8(Mga* mga, int index, uchar val)
{
mga->mmio[index] = val;
}
static uchar
mgaread8(Mga* mga, int index)
{
return mga->mmio[index];
}
static uchar
seqget(Mga* mga, int index)
{
mgawrite8(mga, SEQIDX, index);
return mgaread8(mga, SEQDATA);
}
static uchar
seqset(Mga* mga, int index, uchar set, uchar clr)
{
uchar tmp;
mgawrite8(mga, SEQIDX, index);
tmp = mgaread8(mga, SEQDATA);
mgawrite8(mga, SEQIDX, index);
mgawrite8(mga, SEQDATA, (tmp & ~clr) | set);
return tmp;
}
static uchar
crtcget(Mga* mga, int index)
{
mgawrite8(mga, CRTCIDX, index);
return mgaread8(mga, CRTCDATA);
}
static uchar
crtcset(Mga* mga, int index, uchar set, uchar clr)
{
uchar tmp;
mgawrite8(mga, CRTCIDX, index);
tmp = mgaread8(mga, CRTCDATA);
mgawrite8(mga, CRTCIDX, index);
mgawrite8(mga, CRTCDATA, (tmp & ~clr) | set);
return tmp;
}
static uchar
crtcextget(Mga* mga, int index)
{
mgawrite8(mga, CRTCEXTIDX, index);
return mgaread8(mga, CRTCEXTDATA);
}
static uchar
crtcextset(Mga* mga, int index, uchar set, uchar clr)
{
uchar tmp;
mgawrite8(mga, CRTCEXTIDX, index);
tmp = mgaread8(mga, CRTCEXTDATA);
mgawrite8(mga, CRTCEXTIDX, index);
mgawrite8(mga, CRTCEXTDATA, (tmp & ~clr) | set);
return tmp;
}
static uchar
dacget(Mga* mga, int index)
{
mgawrite8(mga, RAMDACIDX, index);
return mgaread8(mga, RAMDACDATA);
}
static uchar
dacset(Mga* mga, int index, uchar set, uchar clr)
{
uchar tmp;
mgawrite8(mga, RAMDACIDX, index);
tmp = mgaread8(mga, RAMDACDATA);
mgawrite8(mga, RAMDACIDX, index);
mgawrite8(mga, RAMDACDATA, (tmp & ~clr) | set);
return tmp;
}
static uchar
gctlget(Mga* mga, int index)
{
mgawrite8(mga, GCTLIDX, index);
return mgaread8(mga, GCTLDATA);
}
static uchar
gctlset(Mga* mga, int index, uchar set, uchar clr)
{
uchar tmp;
mgawrite8(mga, GCTLIDX, index);
tmp = mgaread8(mga, GCTLDATA);
mgawrite8(mga, GCTLIDX, index);
mgawrite8(mga, GCTLDATA, (tmp & ~clr) | set);
return tmp;
}
static uchar
attrget(Mga* mga, int index)
{
mgawrite8(mga, ATTRIDX, index);
return mgaread8(mga, ATTRDATA);
}
static uchar
attrset(Mga* mga, int index, uchar set, uchar clr)
{
uchar tmp;
mgawrite8(mga, ATTRIDX, index);
tmp = mgaread8(mga, ATTRDATA);
mgawrite8(mga, ATTRIDX, index);
mgawrite8(mga, ATTRDATA, (tmp & ~clr) | set);
return tmp;
}
static uchar
miscget(Mga* mga)
{
return mgaread8(mga, MISC_R);
}
static uchar
miscset(Mga* mga, uchar set, uchar clr)
{
uchar tmp;
tmp = mgaread8(mga, MISC_R);
mgawrite8(mga, MISC_W, (tmp & ~clr) | set);
return tmp;
}
/* ************************************************************ */
static void
dump_all_regs(Mga* mga)
{
int i;
for (i = 0; i < 25; i++)
trace("crtc[%d] = 0x%x\n", i, crtcget(mga, i));
for (i = 0; i < 9; i++)
trace("crtcext[%d] = 0x%x\n", i, crtcextget(mga, i));
for (i = 0; i < 5; i++)
trace("seq[%d] = 0x%x\n", i, seqget(mga, i));
for (i = 0; i < 9; i++)
trace("gctl[%d] = 0x%x\n", i, gctlget(mga, i));
trace("misc = 0x%x\n", mgaread8(mga, MISC_R));
for (i = 0; i < 0x87; i++)
trace("dac[%d] = 0x%x\n", i, dacget(mga, i));
}
/* ************************************************************ */
static void
dump(Vga* vga, Ctlr* ctlr)
{
dump_all_regs(vga->private);
ctlr->flag |= Fdump;
}
static void
setpalettedepth(int depth)
{
char buf[12];
if ((depth != 8) && (depth != 6) && (depth != 16))
error("mga: invalid palette depth %d\n", depth);
snprint(buf, sizeof(buf), "%d", depth);
vgactlw("palettedepth", buf);
}
static void
mapmga4xx(Vga* vga, Ctlr* ctlr)
{
uchar* m;
Mga * mga;
if(vga->private == nil)
error("%s: g4xxio: no *mga4xx\n", ctlr->name);
mga = vga->private;
vgactlpci(vga->pci);
vgactlw("type", "mga4xx");
m = segattach(0, "mga4xxmmio", 0, 16*Kilo);
if(m == (void*)-1)
error("%s: can't attach mga4xxmmio segment\n", ctlr->name);
mga->mmio = m;
trace("%s: mmio at %#p\n", ctlr->name, mga->mmio);
m = segattach(0, "mga4xxscreen", 0, 32*Meg);
if(m == (void*)-1) {
mga->mgaapsize = 8*Meg;
m = segattach(0, "mga4xxscreen", 0, 8*Meg);
if(m == (void*)-1)
error("%s: can't attach mga4xxscreen segment\n", ctlr->name);
} else {
mga->mgaapsize = 32*Meg;
}
mga->mmfb = m;
trace("%s: frame buffer at %#p\n", ctlr->name, mga->mmfb);
}
static void
snarf(Vga* vga, Ctlr* ctlr)
{
int i, k, n;
uchar * p;
uchar x[16];
Pcidev * pci;
Mga * mga;
uchar crtcext3;
uchar rid;
trace("%s->snarf\n", ctlr->name);
if(vga->private == nil) {
pci = pcimatch(nil, MATROX, MGA4XX);
if(pci == nil)
pci = pcimatch(nil, MATROX, MGA550);
if(pci == nil)
pci = pcimatch(nil, MATROX, MGA200);
if(pci == nil)
error("%s: cannot find matrox adapter\n", ctlr->name);
rid = pcicfgr8(pci, PciRID); // PciRID = 0x08
trace("%s: G%d%d0 rev %d\n", ctlr->name,
2*(pci->did==MGA200)
+4*(pci->did==MGA4XX)
+5*(pci->did==MGA550),
rid&0x80 ? 5 : 0,
rid&~0x80);
i = pcicfgr32(pci, PCfgMgaDevCtrl);
if ((i & 2) != 2)
error("%s: Memory Space not enabled ... Aborting ...\n", ctlr->name);
vga->private = alloc(sizeof(Mga));
mga = (Mga*)vga->private;
mga->devid = pci->did;
mga->revid = rid;
mga->pci = pci;
mapmga4xx(vga, ctlr);
}
else {
mga = (Mga*)vga->private;
}
/* Find out how much memory is here, some multiple of 2Meg */
/* First Set MGA Mode ... */
crtcext3 = crtcextset(mga, 3, 0x80, 0x00);
p = mga->mmfb;
n = (mga->mgaapsize / Meg) / 2;
for (i = 0; i < n; i++) {
k = (2*i+1)*Meg;
p[k] = 0;
p[k] = i+1;
*(mga->mmio + CACHEFLUSH) = 0;
x[i] = p[k];
trace("x[%d]=%d\n", i, x[i]);
}
for(i = 1; i < n; i++)
if(x[i] != i+1)
break;
vga->vmz = mga->fbsize = 2*i*Meg;
trace("probe found %d megabytes\n", 2*i);
crtcextset(mga, 3, crtcext3, 0xff);
ctlr->flag |= Fsnarf;
}
static void
options(Vga* vga, Ctlr* ctlr)
{
if(vga->virtx & 127)
vga->virtx = (vga->virtx+127)&~127;
ctlr->flag |= Foptions;
}
/* ************************************************************ */
static void
G450ApplyPFactor(Mga*, uchar ucP, ulong *pulFIn)
{
if(!(ucP & 0x40))
{
*pulFIn = *pulFIn / (2L << (ucP & 3));
}
}
static void
G450RemovePFactor(Mga*, uchar ucP, ulong *pulFIn)
{
if(!(ucP & 0x40))
{
*pulFIn = *pulFIn * (2L << (ucP & 3));
}
}
static void
G450CalculVCO(Mga*, ulong ulMNP, ulong *pulF)
{
uchar ucM, ucN;
ucM = (uchar)((ulMNP >> 16) & 0xff);
ucN = (uchar)((ulMNP >> 8) & 0xff);
*pulF = (27000 * (2 * (ucN + 2)) + ((ucM + 1) >> 1)) / (ucM + 1);
trace("G450CalculVCO: ulMNP %lx, pulF %ld\n", ulMNP, *pulF);
}
static void
G450CalculDeltaFreq(Mga*, ulong ulF1, ulong ulF2, ulong *pulDelta)
{
if(ulF2 < ulF1)
{
*pulDelta = ((ulF1 - ulF2) * 1000) / ulF1;
}
else
{
*pulDelta = ((ulF2 - ulF1) * 1000) / ulF1;
}
trace("G450CalculDeltaFreq: ulF1 %ld, ulF2 %ld, pulDelta %ld\n", ulF1, ulF2, *pulDelta);
}
static void
G450FindNextPLLParam(Mga* mga, ulong ulFout, ulong *pulPLLMNP)
{
uchar ucM, ucN, ucP, ucS;
ulong ulVCO, ulVCOMin;
ucM = (uchar)((*pulPLLMNP >> 16) & 0xff);
/* ucN = (uchar)((*pulPLLMNP >> 8) & 0xff); */
ucP = (uchar)(*pulPLLMNP & 0x43);
ulVCOMin = 256000;
if(ulVCOMin >= (255L * 8000))
{
ulVCOMin = 230000;
}
if((ucM == 9) && (ucP & 0x40))
{
*pulPLLMNP = 0xffffffff;
} else if (ucM == 9)
{
if(ucP)
{
ucP--;
}
else
{
ucP = 0x40;
}
ucM = 0;
}
else
{
ucM++;
}
ulVCO = ulFout;
G450RemovePFactor(mga, ucP, &ulVCO);
if(ulVCO < ulVCOMin)
{
*pulPLLMNP = 0xffffffff;
}
if(*pulPLLMNP != 0xffffffff)
{
ucN = (uchar)(((ulVCO * (ucM+1) + 27000)/(27000 * 2)) - 2);
ucS = 5;
if(ulVCO < 1300000) ucS = 4;
if(ulVCO < 1100000) ucS = 3;
if(ulVCO < 900000) ucS = 2;
if(ulVCO < 700000) ucS = 1;
if(ulVCO < 550000) ucS = 0;
ucP |= (uchar)(ucS << 3);
*pulPLLMNP &= 0xff000000;
*pulPLLMNP |= (ulong)ucM << 16;
*pulPLLMNP |= (ulong)ucN << 8;
*pulPLLMNP |= (ulong)ucP;
}
}
static void
G450FindFirstPLLParam(Mga* mga, ulong ulFout, ulong *pulPLLMNP)
{
uchar ucP;
ulong ulVCO;
ulong ulVCOMax;
/* Default value */
ulVCOMax = 1300000;
if(ulFout > (ulVCOMax/2))
{
ucP = 0x40;
ulVCO = ulFout;
}
else
{
ucP = 3;
ulVCO = ulFout;
G450RemovePFactor(mga, ucP, &ulVCO);
while(ucP && (ulVCO > ulVCOMax))
{
ucP--;
ulVCO = ulFout;
G450RemovePFactor(mga, ucP, &ulVCO);
}
}
if(ulVCO > ulVCOMax)
{
*pulPLLMNP = 0xffffffff;
}
else
{
/* Pixel clock: 1 */
*pulPLLMNP = (1 << 24) + 0xff0000 + ucP;
G450FindNextPLLParam(mga, ulFout, pulPLLMNP);
}
}
static void
G450WriteMNP(Mga* mga, ulong ulMNP)
{
if (0) trace("G450WriteMNP : 0x%lx\n", ulMNP);
dacset(mga, Dac_Xpixpllcm, (uchar)(ulMNP >> 16), 0xff);
dacset(mga, Dac_Xpixpllcn, (uchar)(ulMNP >> 8), 0xff);
dacset(mga, Dac_Xpixpllcp, (uchar)ulMNP, 0xff);
}
static void
G450CompareMNP(Mga* mga, ulong ulFout, ulong ulMNP1,
ulong ulMNP2, long *pulResult)
{
ulong ulFreq, ulDelta1, ulDelta2;
G450CalculVCO(mga, ulMNP1, &ulFreq);
G450ApplyPFactor(mga, (uchar) ulMNP1, &ulFreq);
G450CalculDeltaFreq(mga, ulFout, ulFreq, &ulDelta1);
G450CalculVCO(mga, ulMNP2, &ulFreq);
G450ApplyPFactor(mga, (uchar) ulMNP2, &ulFreq);
G450CalculDeltaFreq(mga, ulFout, ulFreq, &ulDelta2);
if(ulDelta1 < ulDelta2)
{
*pulResult = -1;
}
else if(ulDelta1 > ulDelta2)
{
*pulResult = 1;
}
else
{
*pulResult = 0;
}
if((ulDelta1 <= 5) && (ulDelta2 <= 5))
{
if((ulMNP1 & 0xff0000) < (ulMNP2 & 0xff0000))
{
*pulResult = -1;
}
else if((ulMNP1 & 0xff0000) > (ulMNP2 & 0xff0000))
{
*pulResult = 1;
}
}
}
static void
G450IsPllLocked(Mga* mga, int *lpbLocked)
{
ulong ulFallBackCounter, ulLockCount, ulCount;
uchar ucPLLStatus;
/* Pixel PLL */
mgawrite8(mga, 0x3c00, 0x4f);
ulFallBackCounter = 0;
do
{
ucPLLStatus = mgaread8(mga, 0x3c0a);
if (0) trace("ucPLLStatus[1] : 0x%x\n", ucPLLStatus);
ulFallBackCounter++;
} while(!(ucPLLStatus & 0x40) && (ulFallBackCounter < 1000));
ulLockCount = 0;
if(ulFallBackCounter < 1000)
{
for(ulCount = 0; ulCount < 100; ulCount++)
{
ucPLLStatus = mgaread8(mga, 0x3c0a);
if (0) trace("ucPLLStatus[2] : 0x%x\n", ucPLLStatus);
if(ucPLLStatus & 0x40)
{
ulLockCount++;
}
}
}
*lpbLocked = ulLockCount >= 90;
}
static void
G450SetPLLFreq(Mga* mga, long f_out)
{
int bFoundValidPLL;
int bLocked;
ulong ulMaxIndex;
ulong ulMNP;
ulong ulMNPTable[MNP_TABLE_SIZE];
ulong ulIndex;
ulong ulTryMNP;
long lCompareResult;
trace("f_out : %ld\n", f_out);
G450FindFirstPLLParam(mga, f_out, &ulMNP);
ulMNPTable[0] = ulMNP;
G450FindNextPLLParam(mga, f_out, &ulMNP);
ulMaxIndex = 1;
while(ulMNP != 0xffffffff)
{
int ulIndex;
int bSkipValue;
bSkipValue = FALSE;
if(ulMaxIndex == MNP_TABLE_SIZE)
{
G450CompareMNP(mga, f_out, ulMNP, ulMNPTable[MNP_TABLE_SIZE - 1],
&lCompareResult);
if(lCompareResult > 0)
{
bSkipValue = TRUE;
}
else
{
ulMaxIndex--;
}
}
if(!bSkipValue)
{
for(ulIndex = ulMaxIndex; !bSkipValue && (ulIndex > 0); ulIndex--)
{
G450CompareMNP(mga, f_out, ulMNP, ulMNPTable[ulIndex - 1],
&lCompareResult);
if(lCompareResult < 0)
{
ulMNPTable[ulIndex] = ulMNPTable[ulIndex - 1];
}
else
{
break;
}
}
ulMNPTable[ulIndex] = ulMNP;
ulMaxIndex++;
}
G450FindNextPLLParam(mga, f_out, &ulMNP);
}
bFoundValidPLL = FALSE;
ulMNP = 0;
for(ulIndex = 0; !bFoundValidPLL && (ulIndex < ulMaxIndex); ulIndex++)
{
ulTryMNP = ulMNPTable[ulIndex];
{
bLocked = TRUE;
if((ulMNPTable[ulIndex] & 0xff00) < 0x300 ||
(ulMNPTable[ulIndex] & 0xff00) > 0x7a00)
{
bLocked = FALSE;
}
if(bLocked)
{
G450WriteMNP(mga, ulTryMNP - 0x300);
G450IsPllLocked(mga, &bLocked);
}
if(bLocked)
{
G450WriteMNP(mga, ulTryMNP + 0x300);
G450IsPllLocked(mga, &bLocked);
}
if(bLocked)
{
G450WriteMNP(mga, ulTryMNP - 0x200);
G450IsPllLocked(mga, &bLocked);
}
if(bLocked)
{
G450WriteMNP(mga, ulTryMNP + 0x200);
G450IsPllLocked(mga, &bLocked);
}
if(bLocked)
{
G450WriteMNP(mga, ulTryMNP - 0x100);
G450IsPllLocked(mga, &bLocked);
}
if(bLocked)
{
G450WriteMNP(mga, ulTryMNP + 0x100);
G450IsPllLocked(mga, &bLocked);
}
if(bLocked)
{
G450WriteMNP(mga, ulTryMNP);
G450IsPllLocked(mga, &bLocked);
}
else if(!ulMNP)
{
G450WriteMNP(mga, ulTryMNP);
G450IsPllLocked(mga, &bLocked);
if(bLocked)
{
ulMNP = ulMNPTable[ulIndex];
}
bLocked = FALSE;
}
if(bLocked)
{
bFoundValidPLL = TRUE;
}
}
}
if(!bFoundValidPLL)
{
if(ulMNP)
{
G450WriteMNP(mga, ulMNP);
}
else
{
G450WriteMNP(mga, ulMNPTable[0]);
}
}
}
/* ************************************************************ */
/*
calcclock - Calculate the PLL settings (m, n, p, s).
*/
static double
g400_calcclock(Mga* mga, long Fneeded)
{
double Fpll;
double Fvco;
double Fref;
int pixpll_m_min;
int pixpll_m_max;
int pixpll_n_min;
int pixpll_n_max;
int pixpll_p_max;
double Ferr, Fcalc;
int m, n, p;
if (mga->devid == MGA4XX || mga->devid == MGA550) {
/* These values are taken from Matrox G400 Specification - p 4-91 */
Fref = 27000000.0;
pixpll_n_min = 7;
pixpll_n_max = 127;
pixpll_m_min = 1;
pixpll_m_max = 31;
pixpll_p_max = 7;
} else { /* MGA200 */
/* These values are taken from Matrox G200 Specification - p 4-77 */
//Fref = 14318180.0;
Fref = 27050500.0;
pixpll_n_min = 7;
pixpll_n_max = 127;
pixpll_m_min = 1;
pixpll_m_max = 6;
pixpll_p_max = 7;
}
Fvco = ( double ) Fneeded;
for (p = 0; p <= pixpll_p_max && Fvco < mga->maxpclk; p = p * 2 + 1, Fvco *= 2.0)
;
mga->pixpll_p = p;
Ferr = Fneeded;
for ( m = pixpll_m_min ; m <= pixpll_m_max ; m++ )
for ( n = pixpll_n_min; n <= pixpll_n_max; n++ )
{
Fcalc = Fref * (n + 1) / (m + 1) ;
/*
* Pick the closest frequency.
*/
if ( labs(Fcalc - Fvco) < Ferr ) {
Ferr = abs(Fcalc - Fvco);
mga->pixpll_m = m;
mga->pixpll_n = n;
}
}
Fvco = Fref * (mga->pixpll_n + 1) / (mga->pixpll_m + 1);
if (mga->devid == MGA4XX || mga->devid == MGA550) {
if ( (50000000.0 <= Fvco) && (Fvco < 110000000.0) )
mga->pixpll_p |= 0;
if ( (110000000.0 <= Fvco) && (Fvco < 170000000.0) )
mga->pixpll_p |= (1<<3);
if ( (170000000.0 <= Fvco) && (Fvco < 240000000.0) )
mga->pixpll_p |= (2<<3);
if ( (300000000.0 <= Fvco) )
mga->pixpll_p |= (3<<3);
} else {
if ( (50000000.0 <= Fvco) && (Fvco < 100000000.0) )
mga->pixpll_p |= 0;
if ( (100000000.0 <= Fvco) && (Fvco < 140000000.0) )
mga->pixpll_p |= (1<<3);
if ( (140000000.0 <= Fvco) && (Fvco < 180000000.0) )
mga->pixpll_p |= (2<<3);
if ( (250000000.0 <= Fvco) )
mga->pixpll_p |= (3<<3);
}
Fpll = Fvco / (p + 1);
return Fpll;
}
/* ************************************************************ */
static void
init(Vga* vga, Ctlr* ctlr)
{
Mode* mode;
Mga* mga;
double Fpll;
Ctlr* c;
int i;
ulong t;
int bppShift;
mga = vga->private;
mode = vga->mode;
trace("mga mmio at %#p\n", mga->mmio);
ctlr->flag |= Ulinear;
/*
* Set the right bppShitf based on depth
*/
switch(mode->z) {
case 8:
bppShift = 0;
break;
case 16:
bppShift = 1;
break;
case 24:
bppShift = 0;
break;
case 32:
bppShift = 2;
break;
default:
bppShift = 0;
error("depth %d not supported !\n", mode->z);
}
if (mode->interlace)
error("interlaced mode not supported !\n");
trace("%s: Initializing mode %dx%dx%d on %s\n", ctlr->name, mode->x, mode->y, mode->z, mode->type);
trace("%s: Suggested Dot Clock : %d\n", ctlr->name, mode->frequency);
trace("%s: Horizontal Total = %d\n", ctlr->name, mode->ht);
trace("%s: Start Horizontal Blank = %d\n", ctlr->name, mode->shb);
trace("%s: End Horizontal Blank = %d\n", ctlr->name, mode->ehb);
trace("%s: Vertical Total = %d\n", ctlr->name, mode->vt);
trace("%s: Vertical Retrace Start = %d\n", ctlr->name, mode->vrs);
trace("%s: Vertical Retrace End = %d\n", ctlr->name, mode->vre);
trace("%s: Start Horizontal Sync = %d\n", ctlr->name, mode->shs);
trace("%s: End Horizontal Sync = %d\n", ctlr->name, mode->ehs);
trace("%s: HSync = %c\n", ctlr->name, mode->hsync);
trace("%s: VSync = %c\n", ctlr->name, mode->vsync);
trace("%s: Interlace = %d\n", ctlr->name, mode->interlace);
/* TODO : G400 Max : 360000000 */
if (mga->devid == MGA4XX || mga->devid == MGA550)
mga->maxpclk = 300000000;
else
mga->maxpclk = 250000000;
if (mode->frequency < 50000)
error("mga: Too little Frequency %d : Minimum supported by PLL is %d\n",
mode->frequency, 50000);
if (mode->frequency > mga->maxpclk)
error("mga: Too big Frequency %d : Maximum supported by PLL is %ld\n",
mode->frequency, mga->maxpclk);
trace("mga: revision ID is %x\n", mga->revid);
if ((mga->devid == MGA200) || ((mga->devid == MGA4XX) && (mga->revid & 0x80) == 0x00)) {
/* Is it G200/G400 or G450 ? */
Fpll = g400_calcclock(mga, mode->frequency);
trace("Fpll set to %f\n", Fpll);
trace("pixclks : n = %d m = %d p = %d\n", mga->pixpll_n, mga->pixpll_m, mga->pixpll_p & 0x7);
} else
mga->Fneeded = mode->frequency;
trace("PCI Option1 = 0x%x\n", pcicfgr32(mga->pci, PCfgMgaOption1));
trace("PCI Option2 = 0x%x\n", pcicfgr32(mga->pci, PCfgMgaOption2));
trace("PCI Option3 = 0x%x\n", pcicfgr32(mga->pci, PCfgMgaOption3));
mga->htotal = (mode->ht >> 3) - 5;
mga->hdispend = (mode->x >> 3) - 1;
mga->hblkstr = mga->hdispend; /* (mode->shb >> 3); */
mga->hblkend = mga->htotal + 4; /* (mode->ehb >> 3); */
mga->hsyncstr = (mode->shs >> 3) - 1; // Was (mode->shs >> 3);
mga->hsyncend = (mode->ehs >> 3) - 1; // Was (mode->ehs >> 3);
mga->hsyncdel = 0;
mga->vtotal = mode->vt - 2;
mga->vdispend = mode->y - 1;
mga->vblkstr = mode->y - 1;
mga->vblkend = mode->vt - 1;
mga->vsyncstr = mode->vrs;
mga->vsyncend = mode->vre;
mga->linecomp = mode->y;
mga->hsyncsel = 0; /* Do not double lines ... */
mga->startadd = 0;
mga->offset = (mode->z==24) ? (vga->virtx * 3) >> (4 - bppShift) : vga->virtx >> (4-bppShift);
/* No Zoom */
mga->maxscan = 0;
/* Not used in Power Graphic mode */
mga->curloc = 0;
mga->prowscan = 0;
mga->currowstr = 0;
mga->currowend = 0;
mga->curoff = 1;
mga->undrow = 0;
mga->curskew = 0;
mga->conv2t4 = 0;
mga->interlace = 0;
mga->hdispskew = 0;
mga->bytepan = 0;
mga->dotclkrt = 0;
mga->dword = 0;
mga->wbmode = 1;
mga->addwrap = 0; /* Not Used ! */
mga->selrowscan = 1;
mga->cms = 1;
mga->csynccen = 0; /* Disable composite sync */
/* VIDRST Pin */
mga->hrsten = 0; // Was 1;
mga->vrsten = 0; // Was 1;
/* vertical interrupt control ... disabled */
mga->vinten = 1;
mga->vintclr = 0;
/* Let [hv]sync run freely */
mga->hsyncoff = 0;
mga->vsyncoff = 0;
mga->crtcrstN = 1;
mga->mgamode = 1;
mga->scale = (mode->z == 24) ? ((1 << bppShift)*3)-1 : (1 << bppShift)-1;
mga->crtcprotect = 1;
mga->winsize = 0;
mga->winfreq = 0;
if ((mga->htotal == 0)
|| (mga->hblkend <= (mga->hblkstr + 1))
|| ((mga->htotal - mga->hdispend) == 0)
|| ((mga->htotal - mga->bytepan + 2) <= mga->hdispend)
|| (mga->hsyncstr <= (mga->hdispend + 2))
|| (mga->vtotal == 0))
{
error("Invalid Power Graphic Mode :\n"
"mga->htotal = %ld\n"
"mga->hdispend = %ld\n"
"mga->hblkstr = %ld\n"
"mga->hblkend = %ld\n"
"mga->hsyncstr = %ld\n"
"mga->hsyncend = %ld\n"
"mga->hsyncdel = %ld\n"
"mga->vtotal = %ld\n"
"mga->vdispend = %ld\n"
"mga->vblkstr = %ld\n"
"mga->vblkend = %ld\n"
"mga->vsyncstr = %ld\n"
"mga->vsyncend = %ld\n"
"mga->linecomp = %ld\n",
mga->htotal,
mga->hdispend,
mga->hblkstr,
mga->hblkend,
mga->hsyncstr,
mga->hsyncend,
mga->hsyncdel,
mga->vtotal,
mga->vdispend,
mga->vblkstr,
mga->vblkend,
mga->vsyncstr,
mga->vsyncend,
mga->linecomp
);
}
mga->hiprilvl = 0;
mga->maxhipri = 0;
mga->c2hiprilvl = 0;
mga->c2maxhipri = 0;
mga->misc = ((mode->hsync != '-')?0:(1<<6)) | ((mode->vsync != '-')?0:(1<<7));
trace("mga->htotal = %ld\n"
"mga->hdispend = %ld\n"
"mga->hblkstr = %ld\n"
"mga->hblkend = %ld\n"
"mga->hsyncstr = %ld\n"
"mga->hsyncend = %ld\n"
"mga->hsyncdel = %ld\n"
"mga->vtotal = %ld\n"
"mga->vdispend = %ld\n"
"mga->vblkstr = %ld\n"
"mga->vblkend = %ld\n"
"mga->vsyncstr = %ld\n"
"mga->vsyncend = %ld\n"
"mga->linecomp = %ld\n",
mga->htotal,
mga->hdispend,
mga->hblkstr,
mga->hblkend,
mga->hsyncstr,
mga->hsyncend,
mga->hsyncdel,
mga->vtotal,
mga->vdispend,
mga->vblkstr,
mga->vblkend,
mga->vsyncstr,
mga->vsyncend,
mga->linecomp
);
mga->crtc[0x00] = 0xff & mga->htotal;
mga->crtc[0x01] = 0xff & mga->hdispend;
mga->crtc[0x02] = 0xff & mga->hblkstr;
mga->crtc[0x03] = (0x1f & mga->hblkend)
| ((0x03 & mga->hdispskew) << 5)
| 0x80 /* cf 3-304 */
;
mga->crtc[0x04] = 0xff & mga->hsyncstr;
mga->crtc[0x05] = (0x1f & mga->hsyncend)
| ((0x03 & mga->hsyncdel) << 5)
| ((0x01 & (mga->hblkend >> 5)) << 7)
;
mga->crtc[0x06] = 0xff & mga->vtotal;
t = ((0x01 & (mga->vtotal >> 8)) << 0)
| ((0x01 & (mga->vdispend >> 8)) << 1)
| ((0x01 & (mga->vsyncstr >> 8)) << 2)
| ((0x01 & (mga->vblkstr >> 8)) << 3)
| ((0x01 & (mga->linecomp >> 8)) << 4)
| ((0x01 & (mga->vtotal >> 9)) << 5)
| ((0x01 & (mga->vdispend >> 9)) << 6)
| ((0x01 & (mga->vsyncstr >> 9)) << 7)
;
mga->crtc[0x07] = 0xff & t;
mga->crtc[0x08] = (0x1f & mga->prowscan)
| ((0x03 & mga->bytepan) << 5)
;
mga->crtc[0x09] = (0x1f & mga->maxscan)
| ((0x01 & (mga->vblkstr >> 9)) << 5)
| ((0x01 & (mga->linecomp >> 9)) << 6)
| ((0x01 & mga->conv2t4) << 7)
;
mga->crtc[0x0a] = (0x1f & mga->currowstr)
| ((0x01 & mga->curoff) << 5)
;
mga->crtc[0x0b] = (0x1f & mga->currowend)
| ((0x03 & mga->curskew) << 5)
;
mga->crtc[0x0c] = 0xff & (mga->startadd >> 8);
mga->crtc[0x0d] = 0xff & mga->startadd;
mga->crtc[0x0e] = 0xff & (mga->curloc >> 8);
mga->crtc[0x0f] = 0xff & mga->curloc;
mga->crtc[0x10] = 0xff & mga->vsyncstr;
mga->crtc[0x11] = (0x0f & mga->vsyncend)
| ((0x01 & mga->vintclr) << 4)
| ((0x01 & mga->vinten) << 5)
| ((0x01 & mga->crtcprotect) << 7)
;
mga->crtc[0x12] = 0xff & mga->vdispend;
mga->crtc[0x13] = 0xff & mga->offset;
mga->crtc[0x14] = 0x1f & mga->undrow; /* vga only */
mga->crtc[0x15] = 0xff & mga->vblkstr;
mga->crtc[0x16] = 0xff & mga->vblkend;
mga->crtc[0x17] = ((0x01 & mga->cms) << 0)
| ((0x01 & mga->selrowscan) << 1)
| ((0x01 & mga->hsyncsel) << 2)
| ((0x01 & mga->addwrap) << 5)
| ((0x01 & mga->wbmode) << 6)
| ((0x01 & mga->crtcrstN) << 7)
;
mga->crtc[0x18] = 0xff & mga->linecomp;
mga->crtcext[0] = (0x0f & (mga->startadd >> 16))
| ((0x03 & (mga->offset >> 8)) << 4)
| ((0x01 & (mga->startadd >> 20)) << 6)
| ((0x01 & mga->interlace) << 7)
;
mga->crtcext[1] = ((0x01 & (mga->htotal >> 8)) << 0)
| ((0x01 & (mga->hblkstr >> 8)) << 1)
| ((0x01 & (mga->hsyncstr >> 8)) << 2)
| ((0x01 & mga->hrsten) << 3)
| ((0x01 & mga->hsyncoff) << 4)
| ((0x01 & mga->vsyncoff) << 5)
| ((0x01 & (mga->hblkend >> 6)) << 6)
| ((0x01 & mga->vrsten) << 7)
;
mga->crtcext[2] = ((0x03 & (mga->vtotal >> 10)) << 0)
| ((0x01 & (mga->vdispend >> 10)) << 2)
| ((0x03 & (mga->vblkstr >> 10)) << 3)
| ((0x03 & (mga->vsyncstr >> 10)) << 5)
| ((0x01 & (mga->linecomp >> 10)) << 7)
;
mga->crtcext[3] = ((0x07 & mga->scale) << 0)
| ((0x01 & mga->csynccen) << 6)
| ((0x01 & mga->mgamode) << 7)
;
mga->crtcext[4] = 0; /* memory page ... not used in Power Graphic Mode */
mga->crtcext[5] = 0; /* Not used in non-interlaced mode */
mga->crtcext[6] = ((0x07 & mga->hiprilvl) << 0)
| ((0x07 & mga->maxhipri) << 4)
;
mga->crtcext[7] = ((0x07 & mga->winsize) << 1)
| ((0x07 & mga->winfreq) << 5)
;
mga->crtcext[8] = (0x01 & (mga->startadd >> 21)) << 0;
/* Initialize Sequencer */
mga->sequencer[0] = 0;
mga->sequencer[1] = 0;
mga->sequencer[2] = 0x03;
mga->sequencer[3] = 0;
mga->sequencer[4] = 0x02;
/* Graphic Control registers are ignored when not using 0xA0000 aperture */
for (i = 0; i < 9; i++)
mga->graphics[i] = 0;
/* The Attribute Controler is not available in Power Graphics mode */
for (i = 0; i < 0x15; i++)
mga->attribute[i] = i;
/* disable vga load (want to do fields in different order) */
for(c = vga->link; c; c = c->link)
if (strncmp(c->name, "vga", 3) == 0)
c->load = nil;
}
static void
load(Vga* vga, Ctlr* ctlr)
{
Mga* mga;
int i;
uchar* p;
Mode* mode;
uchar cursor;
mga = vga->private;
mode = vga->mode;
trace("mga: Loading ...\n");
dump_all_regs(mga);
if (mode->z == 8)
setpalettedepth(mode->z);
trace("mga mmio at %#p\n", mga->mmio);
trace("mga: loading vga registers ...\n" );
if (ultradebug) Bflush(&stdout);
/* Initialize Sequencer registers */
for(i = 0; i < 5; i++)
seqset(mga, i, mga->sequencer[i], 0xff);
/* Initialize Attribute register */
for(i = 0; i < 0x15; i++)
attrset(mga, i, mga->attribute[i], 0xff);
/* Initialize Graphic Control registers */
for(i = 0; i < 9; i++)
gctlset(mga, i, mga->graphics[i], 0xff);
/* Wait VSYNC */
while (mgaread8(mga, STATUS1) & 0x08);
while (! (mgaread8(mga, STATUS1) & ~0x08));
/* Turn off the video. */
seqset(mga, Seq_ClockingMode, Scroff, 0);
/* Crtc2 Off */
mgawrite32(mga, C2_CTL, 0);
/* Disable Cursor */
cursor = dacset(mga, Dac_Xcurctrl, CursorDis, 0xff);
/* Pixel Pll UP and set Pixel clock source to Pixel Clock PLL */
dacset(mga, Dac_Xpixclkctrl, 0x01 | 0x08, 0x0f);
trace("mga: waiting for the clock source becomes stable ...\n");
while ((dacget(mga, Dac_Xpixpllstat) & Pixlock) != Pixlock)
;
trace("mga: pixpll locked !\n");
if (ultradebug) Bflush(&stdout);
/* Enable LUT, Disable MAFC */
dacset(mga, Dac_Xmiscctrl, Ramcs | Mfcsel, Vdoutsel);
/* Disable Dac */
dacset(mga, Dac_Xmiscctrl, 0, Dacpdn);
/* Initialize Panel Mode */
dacset(mga, Dac_Xpanelmode, 0, 0xff);
/* Disable the PIXCLK and set Pixel clock source to Pixel Clock PLL */
dacset(mga, Dac_Xpixclkctrl, Pixclkdis | 0x01, 0x3);
/* Disable mapping of the memory */
miscset(mga, 0, Misc_rammapen);
/* Enable 8 bit palette */
dacset(mga, Dac_Xmiscctrl, Vga8dac, 0);
/* Select MGA Pixel Clock */
miscset(mga, Misc_clksel, 0);
/* Initialize Z Buffer ... (useful?) */
mgawrite32(mga, Z_DEPTH_ORG, 0);
/* Wait */
for (i = 0; i < 50; i++)
mgaread32(mga, MGA_STATUS);
if ((mga->devid == MGA200) || ((mga->devid == MGA4XX) && (mga->revid & 0x80) == 0x00)) {
dacset(mga, Dac_Xpixpllcm, mga->pixpll_m, 0xff);
dacset(mga, Dac_Xpixpllcn, mga->pixpll_n, 0xff);
dacset(mga, Dac_Xpixpllcp, mga->pixpll_p, 0xff);
/* Wait until new clock becomes stable */
trace("mga: waiting for the clock source becomes stable ...\n");
while ((dacget(mga, Dac_Xpixpllstat) & Pixlock) != Pixlock)
;
trace("mga: pixpll locked !\n");
} else {
/* MGA450 and MGA550 */
/* Wait until new clock becomes stable */
trace("mga450: waiting for the clock source becomes stable ...\n");
while ((dacget(mga, Dac_Xpixpllstat) & Pixlock) != Pixlock)
;
trace("mga: pixpll locked !\n");
G450SetPLLFreq(mga, (long) mga->Fneeded / 1000);
}
/* Enable Pixel Clock Oscillation */
dacset(mga, Dac_Xpixclkctrl, 0, Pixclkdis);
if (ultradebug) Bflush(&stdout);
/* Enable Dac */
dacset(mga, Dac_Xmiscctrl, Dacpdn, 0);
/* Set Video Mode */
switch (mode->z) {
case 8:
dacset(mga, Dac_Xmulctrl, _8bitsPerPixel, ColorDepth);
break;
case 16:
dacset(mga, Dac_Xmulctrl, _16bitsPerPixel, ColorDepth);
break;
case 24:
dacset(mga, Dac_Xmulctrl, _24bitsPerPixel, ColorDepth);
break;
case 32:
dacset(mga, Dac_Xmulctrl, _32bitsPerPixel, ColorDepth);
break;
default:
error("Unsupported depth %d\n", mode->z);
}
/* Wait */
for (i = 0; i < 50; i++)
mgaread32(mga, MGA_STATUS);
/* Wait until new clock becomes stable */
trace("mga: waiting for the clock source becomes stable ...\n");
if (ultradebug) Bflush(&stdout);
while ((dacget(mga, Dac_Xpixpllstat) & Pixlock) != Pixlock)
;
trace("mga: pixpll locked !\n");
if (ultradebug) Bflush(&stdout);
/* Initialize CRTC registers and remove irq */
crtcset(mga, 0x11, (1<<4), (1<<5)|0x80);
for (i = 0; i < 25; i++)
crtcset(mga, i, mga->crtc[i], 0xff);
trace("mga: crtc loaded !\n");
if (ultradebug) Bflush(&stdout);
/* Initialize CRTC Extension registers */
for (i = 0; i < 9; i++)
crtcextset(mga, i, mga->crtcext[i], 0xff);
trace("mga: ext loaded !\n");
if (ultradebug) Bflush(&stdout);
/* Disable Zoom */
dacset(mga, Dac_Xzoomctrl, 0, 0xff);
trace("mga: XzoomCtrl Loaded !\n");
if (ultradebug) Bflush(&stdout);
/* Enable mga mode again ... Just in case :) */
crtcextset(mga, CrtcExt_Miscellaneous, Mgamode, 0);
trace("mga: crtcext MgaMode loaded !\n");
if (ultradebug) Bflush(&stdout);
if (mode->z == 32 || mode->z == 24 ) {
/* Initialize Big Endian Mode ! */
mgawrite32(mga, 0x1e54, 0x02 << 16);
}
/* Set final misc ... enable mapping ... */
miscset(mga, mga->misc | Misc_rammapen, 0);
trace("mga: mapping enabled !\n");
if (ultradebug) Bflush(&stdout);
/* Enable Screen */
seqset(mga, 1, 0, 0xff);
trace("screen enabled ...\n");
if (0) {
p = mga->mmfb;
for (i = 0; i < mga->fbsize; i++)
*p++ = (0xff & i);
}
trace("mga: Loaded !\n" );
dump_all_regs(mga);
if (ultradebug) Bflush(&stdout);
trace("mga: Loaded [bis]!\n" );
/*
* TODO: In 16bpp mode, what is the correct palette ?
* in the meantime lets use the default one,
* which has a weird color combination.
*/
if (mode->z != 8 && mode ->z != 16) {
/* Initialize Palette */
mgawrite8(mga, RAMDACIDX, 0);
for (i = 0; i < 0x100; i++) {
mgawrite8(mga, RAMDACPALDATA, i);
mgawrite8(mga, RAMDACPALDATA, i);
mgawrite8(mga, RAMDACPALDATA, i);
}
}
trace("mga: Palette initialised !\n");
/* Enable Cursor */
dacset(mga, Dac_Xcurctrl, cursor, 0xff);
ctlr->flag |= Fload;
if (ultradebug) Bflush(&stdout);
}
Ctlr mga4xx = {
"mga4xx", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
Ctlr mga4xxhwgc = {
"mga4xxhwgc", /* name */
0, /* snarf */
0, /* options */
0, /* init */
0, /* load */
dump, /* dump */
};