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/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/vbe/vbe.c,v 1.12 2000/08/04 16:13:41 eich Exp $ */
#include "xf86.h"
#include "xf86_ansic.h"
#include "vbe.h"
#include "Xarch.h"
#define VERSION(x) *((CARD8*)(&x) + 1),(CARD8)(x)
#if X_BYTE_ORDER == X_LITTLE_ENDIAN
#define B_O16(x) (x)
#define B_O32(x) (x)
#else
#define B_O16(x) ((((x) & 0xff) << 8) | (((x) & 0xff) >> 8))
#define B_O32(x) ((((x) & 0xff) << 24) | (((x) & 0xff00) << 8) \
| (((x) & 0xff0000) >> 8) | (((x) & 0xff000000) >> 24))
#endif
#define L_ADD(x) (B_O32(x) & 0xffff) + ((B_O32(x) >> 12) & 0xffff00)
static unsigned char * vbeReadEDID(vbeInfoPtr pVbe);
static Bool vbeProbeDDC(vbeInfoPtr pVbe);
static const char *ddcSymbols[] = {
"xf86InterpretEDID",
NULL
};
vbeInfoPtr
VBEInit(xf86Int10InfoPtr pInt, int entityIndex)
{
int RealOff;
pointer page = NULL;
ScrnInfoPtr pScrn = xf86FindScreenForEntity(entityIndex);
vbeControllerInfoPtr vbe = NULL;
char vbeVersionString[] = "VBE2";
Bool init_int10 = FALSE;
vbeInfoPtr vip = NULL;
int screen = pScrn->scrnIndex;
if (!pInt) {
if (!xf86LoadSubModule(pScrn, "int10"))
goto error;
xf86DrvMsg(screen,X_INFO,"initializing int10\n");
pInt = xf86InitInt10(entityIndex);
if (!pInt)
goto error;
init_int10 = TRUE;
}
page = xf86Int10AllocPages(pInt,1,&RealOff);
if (!page) goto error;
vbe = (vbeControllerInfoPtr) page;
memcpy(vbe->VbeSignature,vbeVersionString,4);
pInt->ax = 0x4F00;
pInt->es = SEG_ADDR(RealOff);
pInt->di = SEG_OFF(RealOff);
pInt->num = 0x10;
xf86ExecX86int10(pInt);
if ((pInt->ax & 0xff) != 0x4f) goto error;
switch (pInt->ax & 0xff00) {
case 0:
xf86DrvMsg(screen,X_INFO,"VESA Bios detected\n");
break;
case 0x100:
xf86DrvMsg(screen,X_INFO,"VESA Bios function failed\n");
goto error;
case 0x200:
xf86DrvMsg(screen,X_INFO,"VESA Bios not supported\n");
goto error;
case 0x300:
xf86DrvMsg(screen,X_INFO,"VESA Bios not supported in current mode\n");
goto error;
default:
xf86DrvMsg(screen,X_INFO,"Invalid\n");
goto error;
}
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE Version %i.%i\n",
VERSION(vbe->VbeVersion));
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE Total Mem: %i kB\n",
vbe->TotalMem * 64);
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE OEM: %s\n",
(CARD8*)xf86int10Addr(pInt,L_ADD(vbe->OemStringPtr)));
if (B_O16(vbe->VbeVersion) >= 0x200) {
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE OEM Software Rev: %i.%i\n",
VERSION(vbe->OemSoftwareRev));
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE OEM Vendor: %s\n",
(CARD8*)xf86int10Addr(pInt,L_ADD(vbe->OemVendorNamePtr)));
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE OEM Product: %s\n",
(CARD8*)xf86int10Addr(pInt,L_ADD(vbe->OemProductNamePtr)));
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE OEM Product Rev: %s\n",
(CARD8*)xf86int10Addr(pInt,L_ADD(vbe->OemProductRevPtr)));
}
vip = (vbeInfoPtr)xnfalloc(sizeof(vbeInfoRec));
vip->version = B_O16(vbe->VbeVersion);
vip->pInt10 = pInt;
vip->ddc = DDC_UNCHECKED;
vip->memory = page;
vip->real_mode_base = RealOff;
vip->num_pages = 1;
vip->init_int10 = init_int10;
return vip;
error:
if (page)
xf86Int10FreePages(pInt, page, 1);
if (init_int10)
xf86FreeInt10(pInt);
return NULL;
}
void
vbeFree(vbeInfoPtr pVbe)
{
if (!pVbe)
return;
xf86Int10FreePages(pVbe->pInt10,pVbe->memory,pVbe->num_pages);
/* If we have initalized int10 we ought to free it, too */
if (pVbe->init_int10)
xf86FreeInt10(pVbe->pInt10);
xfree(pVbe);
return;
}
static Bool
vbeProbeDDC(vbeInfoPtr pVbe)
{
char *ddc_level;
int screen = pVbe->pInt10->scrnIndex;
if (!pVbe || (pVbe->ddc == DDC_NONE))
return FALSE;
if (pVbe->ddc != DDC_UNCHECKED)
return TRUE;
pVbe->pInt10->ax = 0x4F15;
pVbe->pInt10->bx = 0;
pVbe->pInt10->cx = 0;
pVbe->pInt10->es = 0;
pVbe->pInt10->di = 0;
pVbe->pInt10->num = 0x10;
xf86ExecX86int10(pVbe->pInt10);
if ((pVbe->pInt10->ax & 0xff) != 0x4f) {
pVbe->ddc = DDC_NONE;
return FALSE;
}
switch ((pVbe->pInt10->ax >> 8) & 0xff) {
case 0:
xf86DrvMsg(screen,X_INFO,"VESA VBE DDC supported\n");
switch (pVbe->pInt10->bx & 0x3) {
case 0:
ddc_level = " none";
pVbe->ddc = DDC_NONE;
break;
case 1:
ddc_level = " 1";
pVbe->ddc = DDC_1;
break;
case 2:
ddc_level = " 2";
pVbe->ddc = DDC_2;
break;
case 3:
ddc_level = " 1 + 2";
pVbe->ddc = DDC_1_2;
break;
default:
ddc_level = "";
pVbe->ddc = DDC_NONE;
break;
}
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE DDC Level%s\n",ddc_level);
if (pVbe->pInt10->bx & 0x4) {
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE DDC Screen blanked"
"for data transfer\n");
pVbe->ddc_blank = TRUE;
} else
pVbe->ddc_blank = FALSE;
xf86DrvMsgVerb(screen,X_INFO,3,
"VESA VBE DDC transfer in appr. %x sec.\n",
(pVbe->pInt10->bx >> 8) & 0xff);
}
return TRUE;
}
typedef enum {
VBEOPT_NOVBE
} VBEOpts;
static OptionInfoRec VBEOptions[] = {
{ VBEOPT_NOVBE, "NoVBE", OPTV_BOOLEAN, {0}, FALSE },
{ -1, NULL, OPTV_NONE, {0}, FALSE },
};
#define nVBEOptions (sizeof(VBEOptions) / sizeof(VBEOptions[0]))
static unsigned char *
vbeReadEDID(vbeInfoPtr pVbe)
{
int RealOff = pVbe->real_mode_base;
pointer page = pVbe->memory;
unsigned char *tmp = NULL;
Bool novbe = FALSE;
int screen = pVbe->pInt10->scrnIndex;
OptionInfoRec options[nVBEOptions];
if (!page) return NULL;
(void)memcpy(options, VBEOptions, sizeof(VBEOptions));
xf86ProcessOptions(screen, xf86Screens[screen]->options, options);
xf86GetOptValBool(options, VBEOPT_NOVBE, &novbe);
if (novbe) return NULL;
if (!vbeProbeDDC(pVbe)) goto error;
pVbe->pInt10->ax = 0x4F15;
pVbe->pInt10->bx = 0x01;
pVbe->pInt10->cx = 0;
pVbe->pInt10->es = SEG_ADDR(RealOff);
pVbe->pInt10->di = SEG_OFF(RealOff);
pVbe->pInt10->num = 0x10;
xf86ExecX86int10(pVbe->pInt10);
if ((pVbe->pInt10->ax & 0xff) != 0x4f)
goto error;
switch (pVbe->pInt10->ax & 0xff00) {
case 0:
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE DDC read successfully\n");
tmp = (unsigned char *)xnfalloc(128);
memcpy(tmp,page,128);
break;
case 1:
xf86DrvMsgVerb(screen,X_INFO,3,"VESA VBE DDC read failed\n");
break;
default:
break;
}
error:
return tmp;
}
xf86MonPtr
vbeDoEDID(vbeInfoPtr pVbe, pointer pDDCModule)
{
xf86MonPtr pMonitor;
pointer pModule;
unsigned char *DDC_data = NULL;
if (!pVbe) return NULL;
if (pVbe->version < 0x200)
return NULL;
if (!(pModule = pDDCModule)) {
pModule =
xf86LoadSubModule(xf86Screens[pVbe->pInt10->scrnIndex], "ddc");
if (!pModule)
return NULL;
xf86LoaderReqSymLists(ddcSymbols, NULL);
}
DDC_data = vbeReadEDID(pVbe);
if (!DDC_data)
return NULL;
pMonitor = xf86InterpretEDID(pVbe->pInt10->scrnIndex, DDC_data);
if (!pDDCModule)
xf86UnloadSubModule(pModule);
return pMonitor;
}
Bool
vbeModeInit(vbeInfoPtr pVbe, int mode)
{
pVbe->pInt10->ax = 0x4F02;
pVbe->pInt10->bx = mode | (1 << 14);
xf86ExecX86int10(pVbe->pInt10);
if ((pVbe->pInt10->ax & 0xff) != 0x4f)
return FALSE;
return TRUE;
}
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