diff options
Diffstat (limited to 'src/mga_g450pll.c')
| -rw-r--r-- | src/mga_g450pll.c | 523 |
1 files changed, 523 insertions, 0 deletions
diff --git a/src/mga_g450pll.c b/src/mga_g450pll.c new file mode 100644 index 0000000..6176549 --- /dev/null +++ b/src/mga_g450pll.c @@ -0,0 +1,523 @@ +/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/mga/mga_g450pll.c,v 1.8 2002/09/16 18:05:56 eich Exp $ */ + +/* All drivers should typically include these */ +#include "xf86.h" +#include "xf86_OSproc.h" +#include "xf86_ansic.h" + +/* Drivers for PCI hardware need this */ +#include "xf86PciInfo.h" + +/* Drivers that need to access the PCI config space directly need this */ +#include "xf86Pci.h" + +#include "mga_bios.h" +#include "mga_reg.h" +#include "mga.h" + +#define MNP_TABLE_SIZE 64 +#define CLKSEL_MGA 0x0c +#define PLLLOCK 0x40 + +static CARD32 G450ApplyPFactor(ScrnInfoPtr pScrn, CARD8 ucP, CARD32 *pulFIn) +{ + if(!(ucP & 0x40)) + { + *pulFIn = *pulFIn / (2L << (ucP & 3)); + } + + return TRUE; +} + + +static CARD32 G450RemovePFactor(ScrnInfoPtr pScrn, CARD8 ucP, CARD32 *pulFIn) +{ + if(!(ucP & 0x40)) + { + *pulFIn = *pulFIn * (2L << (ucP & 3)); + } + + return TRUE; +} + + +static CARD32 G450CalculVCO(ScrnInfoPtr pScrn, CARD32 ulMNP, CARD32 *pulF) +{ + CARD8 ucM, ucN, ucP; + + ucM = (CARD8)((ulMNP >> 16) & 0xff); + ucN = (CARD8)((ulMNP >> 8) & 0xff); + ucP = (CARD8)(ulMNP & 0x03); + + *pulF = (27000 * (2 * (ucN + 2)) + ((ucM + 1) >> 1)) / (ucM + 1); + + return TRUE; +} + + +static CARD32 G450CalculDeltaFreq(ScrnInfoPtr pScrn, CARD32 ulF1, + CARD32 ulF2, CARD32 *pulDelta) +{ + if(ulF2 < ulF1) + { + *pulDelta = ((ulF1 - ulF2) * 1000) / ulF1; + } + else + { + *pulDelta = ((ulF2 - ulF1) * 1000) / ulF1; + } + + return TRUE; +} + + + + +static CARD32 G450FindNextPLLParam(ScrnInfoPtr pScrn, CARD32 ulFout, + CARD32 *pulPLLMNP) +{ + CARD8 ucM, ucN, ucP, ucS; + CARD32 ulVCO, ulVCOMin; + + ucM = (CARD8)((*pulPLLMNP >> 16) & 0xff); + ucN = (CARD8)((*pulPLLMNP >> 8) & 0xff); + ucP = (CARD8)(*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(pScrn, ucP, &ulVCO); + + if(ulVCO < ulVCOMin) + { + *pulPLLMNP = 0xffffffff; + } + + if(*pulPLLMNP != 0xffffffff) + { + ucN = (CARD8)(((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 |= (CARD8)(ucS << 3); + + *pulPLLMNP &= 0xff000000; + *pulPLLMNP |= (CARD32)ucM << 16; + *pulPLLMNP |= (CARD32)ucN << 8; + *pulPLLMNP |= (CARD32)ucP; + +#ifdef DEBUG + ErrorF("FINS_S: VCO = %d, S = %02X, *pulPLLMNP = %08X\n", ulVCO, (ULONG)ucS, *pulPLLMNP); +#endif + } + + return TRUE; +} + + +static CARD32 G450FindFirstPLLParam(ScrnInfoPtr pScrn, CARD32 ulFout, + CARD32 *pulPLLMNP) +{ + CARD8 ucP; + CARD32 ulVCO; + CARD32 ulVCOMax; + + /* Default value */ + ulVCOMax = 1300000; + + if(ulFout > (ulVCOMax/2)) + { + ucP = 0x40; + ulVCO = ulFout; + } + else + { + ucP = 3; + ulVCO = ulFout; + G450RemovePFactor(pScrn, ucP, &ulVCO); + while(ucP && (ulVCO > ulVCOMax)) + { + ucP--; + ulVCO = ulFout; + G450RemovePFactor(pScrn, ucP, &ulVCO); + } + } + + if(ulVCO > ulVCOMax) + { + *pulPLLMNP = 0xffffffff; + } + else + { + /* Pixel clock: 1 */ + *pulPLLMNP = (1 << 24) + 0xff0000 + ucP; + G450FindNextPLLParam(pScrn, ulFout, pulPLLMNP); + } + + return TRUE; + +} + + +static CARD32 G450WriteMNP(ScrnInfoPtr pScrn, CARD32 ulMNP) +{ + MGAPtr pMga = MGAPTR(pScrn); + MGARegPtr pReg; + + pReg = &pMga->ModeReg; + + if (!pMga->SecondCrtc) { + outMGAdac(MGA1064_PIX_PLLC_M, (CARD8)(ulMNP >> 16)); + outMGAdac(MGA1064_PIX_PLLC_N, (CARD8)(ulMNP >> 8)); + outMGAdac(MGA1064_PIX_PLLC_P, (CARD8) ulMNP); + } else { + outMGAdac(MGA1064_VID_PLL_M, (CARD8)(ulMNP >> 16)); + outMGAdac(MGA1064_VID_PLL_N, (CARD8)(ulMNP >> 8)); + outMGAdac(MGA1064_VID_PLL_P, (CARD8) ulMNP); + } + return TRUE; +} + +static CARD32 G450ReadMNP(ScrnInfoPtr pScrn) +{ + MGAPtr pMga = MGAPTR(pScrn); + MGARegPtr pReg; + CARD32 ret = 0; + + pReg = &pMga->ModeReg; + + if (!pMga->SecondCrtc) { + ret = (CARD8)inMGAdac(MGA1064_PIX_PLLC_M) << 16; + ret |= (CARD8)inMGAdac(MGA1064_PIX_PLLC_N) << 8; + ret |= (CARD8)inMGAdac(MGA1064_PIX_PLLC_P); + } else { + ret = (CARD8)inMGAdac(MGA1064_VID_PLL_M) << 16; + ret |= (CARD8)inMGAdac(MGA1064_VID_PLL_N) << 8; + ret |= (CARD8)inMGAdac(MGA1064_VID_PLL_P); + } + return ret; +} + + +static CARD32 G450CompareMNP(ScrnInfoPtr pScrn, CARD32 ulFout, CARD32 ulMNP1, + CARD32 ulMNP2, long *pulResult) +{ + CARD32 ulFreq, ulDelta1, ulDelta2; + + G450CalculVCO(pScrn, ulMNP1, &ulFreq); + G450ApplyPFactor(pScrn, (CARD8) ulMNP1, &ulFreq); + G450CalculDeltaFreq(pScrn, ulFout, ulFreq, &ulDelta1); + + G450CalculVCO(pScrn, ulMNP2, &ulFreq); + G450ApplyPFactor(pScrn, (CARD8) ulMNP2, &ulFreq); + G450CalculDeltaFreq(pScrn, 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; + } + } + + return TRUE; +} + + +static CARD32 G450IsPllLocked(ScrnInfoPtr pScrn, Bool *lpbLocked) +{ + CARD32 ulFallBackCounter, ulLockCount, ulCount; + CARD8 ucPLLStatus; + + MGAPtr pMga = MGAPTR(pScrn); + + /* Pixel PLL */ + if (!pMga->SecondCrtc) + OUTREG8(0x3c00, 0x4f); /* Pixel PLL */ + else + OUTREG8(0x3c00, 0x8c); /* Video PLL */ + + ulFallBackCounter = 0; + + do + { + ucPLLStatus = INREG8(0x3c0a); + ulFallBackCounter++; + } while(!(ucPLLStatus & PLLLOCK) && (ulFallBackCounter < 1000)); + + ulLockCount = 0; + if(ulFallBackCounter < 1000) + { + for(ulCount = 0; ulCount < 100; ulCount++) + { + ucPLLStatus = INREG8(0x3c0a); + if(ucPLLStatus & PLLLOCK) + { + ulLockCount++; + } + } + } + + *lpbLocked = ulLockCount >= 90; + + return TRUE; +} + + +double MGAG450SetPLLFreq(ScrnInfoPtr pScrn, long f_out) +{ + Bool bFoundValidPLL; + Bool bLocked; + CARD8 ucMisc, ucSIndex, ucSTable[4]; + CARD32 ulMaxIndex; + CARD32 ulMNP; + CARD32 ulMNPTable[MNP_TABLE_SIZE]; + CARD32 ulIndex; + CARD32 ulTryMNP; + long lCompareResult; + MGAPtr pMga = MGAPTR(pScrn); + +#ifdef DEBUG + xf86DrvMsg(pScrn->scrnIndex,X_INFO, "Restoring PLLClk = %d\n",f_out); +#endif + G450FindFirstPLLParam(pScrn, f_out, &ulMNP); + ulMNPTable[0] = ulMNP; + G450FindNextPLLParam(pScrn, f_out, &ulMNP); + ulMaxIndex = 1; + while(ulMNP != 0xffffffff) + { + int ulIndex; + Bool bSkipValue; + + bSkipValue = FALSE; + if(ulMaxIndex == MNP_TABLE_SIZE) + { + G450CompareMNP(pScrn, 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(pScrn, f_out, ulMNP, ulMNPTable[ulIndex - 1], + &lCompareResult); + + if(lCompareResult < 0) + { + ulMNPTable[ulIndex] = ulMNPTable[ulIndex - 1]; + } + else + { + break; + } + } + ulMNPTable[ulIndex] = ulMNP; + ulMaxIndex++; + } + + G450FindNextPLLParam(pScrn, f_out, &ulMNP); + } + + bFoundValidPLL = FALSE; + ulMNP = 0; + + /* For pixel pll */ + if (!pMga->SecondCrtc) { + ucMisc = INREG8(0x1FCC); + OUTREG8(0x1fc2, (CARD8)(ucMisc | CLKSEL_MGA)); + } + + for(ulIndex = 0; !bFoundValidPLL && (ulIndex < ulMaxIndex); ulIndex++) + { + ulTryMNP = ulMNPTable[ulIndex]; + + ucSTable[3] = 0xff; + ucSTable[2] = 0xff; + ucSTable[0] = (CARD8) (ulTryMNP & 0x38); + + if (ucSTable[0] != 0) { + ucSTable[1] = ucSTable[0] - 8; + if (ucSTable[0] != 0x38) { + ucSTable[2] = ucSTable[0] + 8; + } + } else { + ucSTable[1] = 8; + } + + for(ucSIndex = 0; !bFoundValidPLL && (ucSTable[ucSIndex] != 0xff); + ucSIndex++) { + ulTryMNP &= 0xffffffc7; + ulTryMNP |= (CARD32)ucSTable[ucSIndex]; + + bLocked = TRUE; + if((ulMNPTable[ulIndex] & 0xff00) < 0x300 || + (ulMNPTable[ulIndex] & 0xff00) > 0x7a00) + { + bLocked = FALSE; + } + + if(bLocked) + { + G450WriteMNP(pScrn, ulTryMNP - 0x300); + G450IsPllLocked(pScrn, &bLocked); + } + + if(bLocked) + { + G450WriteMNP(pScrn, ulTryMNP + 0x300); + G450IsPllLocked(pScrn, &bLocked); + } + + if(bLocked) + { + G450WriteMNP(pScrn, ulTryMNP - 0x200); + G450IsPllLocked(pScrn, &bLocked); + } + + if(bLocked) + { + G450WriteMNP(pScrn, ulTryMNP + 0x200); + G450IsPllLocked(pScrn, &bLocked); + } + + if(bLocked) + { + G450WriteMNP(pScrn, ulTryMNP - 0x100); + G450IsPllLocked(pScrn, &bLocked); + } + + if(bLocked) + { + G450WriteMNP(pScrn, ulTryMNP + 0x100); + G450IsPllLocked(pScrn, &bLocked); + } + + if(bLocked) + { + G450WriteMNP(pScrn, ulTryMNP); + G450IsPllLocked(pScrn, &bLocked); + } + else if(!ulMNP) + { + G450WriteMNP(pScrn, ulTryMNP); + G450IsPllLocked(pScrn, &bLocked); + if(bLocked) + { + ulMNP = ulMNPTable[ulIndex]; + } + bLocked = FALSE; + } + + if(bLocked) + { + bFoundValidPLL = TRUE; + } + } + } + + if(!bFoundValidPLL) + { + if(ulMNP) + { + G450WriteMNP(pScrn, ulMNP); + } + else + { + G450WriteMNP(pScrn, ulMNPTable[0]); + } + } + + return TRUE; +} + +long +MGAG450SavePLLFreq(ScrnInfoPtr pScrn) +{ + CARD32 ulMNP = G450ReadMNP(pScrn); + CARD8 ucP; + CARD32 freq; + + G450CalculVCO(pScrn, ulMNP, &freq); + ucP = (CARD8)(ulMNP & 0x03); + G450ApplyPFactor(pScrn, ucP, &freq); + +#ifdef DEBUG + xf86DrvMsg(pScrn->scrnIndex,X_INFO,"Saved PLLClk = %d\n",freq); +#endif + return freq; +} + +#ifdef DEBUG +void +MGAG450PrintPLL(ScrnInfoPtr pScrn) +{ + CARD32 ulMNP = G450ReadMNP(pScrn); + CARD8 ucP; + CARD32 freq; + + G450CalculVCO(pScrn, ulMNP, &freq); + ucP = (CARD8)(ulMNP & 0x03); + G450ApplyPFactor(pScrn, ucP, &freq); + + xf86DrvMsg(pScrn->scrnIndex,X_INFO,"MGAGClock = %d -- MNP = 0x%x\n", + freq,ulMNP); +} +#endif |