diff options
Diffstat (limited to 'drivers/video/kyro/STG4000VTG.c')
| -rw-r--r-- | drivers/video/kyro/STG4000VTG.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/video/kyro/STG4000VTG.c b/drivers/video/kyro/STG4000VTG.c new file mode 100644 index 0000000..3690b04 --- /dev/null +++ b/drivers/video/kyro/STG4000VTG.c @@ -0,0 +1,170 @@ +/* + * linux/drivers/video/kyro/STG4000VTG.c + * + * Copyright (C) 2002 STMicroelectronics + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/types.h> +#include <video/kyro.h> + +#include "STG4000Reg.h" +#include "STG4000Interface.h" + +void DisableVGA(volatile STG4000REG __iomem *pSTGReg) +{ + u32 tmp; + volatile u32 count, i; + + /* Reset the VGA registers */ + tmp = STG_READ_REG(SoftwareReset); + CLEAR_BIT(8); + STG_WRITE_REG(SoftwareReset, tmp); + + /* Just for Delay */ + for (i = 0; i < 1000; i++) { + count++; + } + + /* Pull-out the VGA registers from reset */ + tmp = STG_READ_REG(SoftwareReset); + tmp |= SET_BIT(8); + STG_WRITE_REG(SoftwareReset, tmp); +} + +void StopVTG(volatile STG4000REG __iomem *pSTGReg) +{ + u32 tmp = 0; + + /* Stop Ver and Hor Sync Generator */ + tmp = (STG_READ_REG(DACSyncCtrl)) | SET_BIT(0) | SET_BIT(2); + CLEAR_BIT(31); + STG_WRITE_REG(DACSyncCtrl, tmp); +} + +void StartVTG(volatile STG4000REG __iomem *pSTGReg) +{ + u32 tmp = 0; + + /* Start Ver and Hor Sync Generator */ + tmp = ((STG_READ_REG(DACSyncCtrl)) | SET_BIT(31)); + CLEAR_BIT(0); + CLEAR_BIT(2); + STG_WRITE_REG(DACSyncCtrl, tmp); +} + +void SetupVTG(volatile STG4000REG __iomem *pSTGReg, + const struct kyrofb_info * pTiming) +{ + u32 tmp = 0; + u32 margins = 0; + u32 ulBorder; + u32 xRes = pTiming->XRES; + u32 yRes = pTiming->YRES; + + /* Horizontal */ + u32 HAddrTime, HRightBorder, HLeftBorder; + u32 HBackPorcStrt, HFrontPorchStrt, HTotal, + HLeftBorderStrt, HRightBorderStrt, HDisplayStrt; + + /* Vertical */ + u32 VDisplayStrt, VBottomBorder, VTopBorder; + u32 VBackPorchStrt, VTotal, VTopBorderStrt, + VFrontPorchStrt, VBottomBorderStrt, VAddrTime; + + /* Need to calculate the right border */ + if ((xRes == 640) && (yRes == 480)) { + if ((pTiming->VFREQ == 60) || (pTiming->VFREQ == 72)) { + margins = 8; + } + } + + /* Work out the Border */ + ulBorder = + (pTiming->HTot - + (pTiming->HST + (pTiming->HBP - margins) + xRes + + (pTiming->HFP - margins))) >> 1; + + /* Border the same for Vertical and Horizontal */ + VBottomBorder = HLeftBorder = VTopBorder = HRightBorder = ulBorder; + + /************ Get Timing values for Horizontal ******************/ + HAddrTime = xRes; + HBackPorcStrt = pTiming->HST; + HTotal = pTiming->HTot; + HDisplayStrt = + pTiming->HST + (pTiming->HBP - margins) + HLeftBorder; + HLeftBorderStrt = HDisplayStrt - HLeftBorder; + HFrontPorchStrt = + pTiming->HST + (pTiming->HBP - margins) + HLeftBorder + + HAddrTime + HRightBorder; + HRightBorderStrt = HFrontPorchStrt - HRightBorder; + + /************ Get Timing values for Vertical ******************/ + VAddrTime = yRes; + VBackPorchStrt = pTiming->VST; + VTotal = pTiming->VTot; + VDisplayStrt = + pTiming->VST + (pTiming->VBP - margins) + VTopBorder; + VTopBorderStrt = VDisplayStrt - VTopBorder; + VFrontPorchStrt = + pTiming->VST + (pTiming->VBP - margins) + VTopBorder + + VAddrTime + VBottomBorder; + VBottomBorderStrt = VFrontPorchStrt - VBottomBorder; + + /* Set Hor Timing 1, 2, 3 */ + tmp = STG_READ_REG(DACHorTim1); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 27); + tmp |= (HTotal) | (HBackPorcStrt << 16); + STG_WRITE_REG(DACHorTim1, tmp); + + tmp = STG_READ_REG(DACHorTim2); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 27); + tmp |= (HDisplayStrt << 16) | HLeftBorderStrt; + STG_WRITE_REG(DACHorTim2, tmp); + + tmp = STG_READ_REG(DACHorTim3); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 27); + tmp |= (HFrontPorchStrt << 16) | HRightBorderStrt; + STG_WRITE_REG(DACHorTim3, tmp); + + /* Set Ver Timing 1, 2, 3 */ + tmp = STG_READ_REG(DACVerTim1); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 27); + tmp |= (VBackPorchStrt << 16) | (VTotal); + STG_WRITE_REG(DACVerTim1, tmp); + + tmp = STG_READ_REG(DACVerTim2); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 27); + tmp |= (VDisplayStrt << 16) | VTopBorderStrt; + STG_WRITE_REG(DACVerTim2, tmp); + + tmp = STG_READ_REG(DACVerTim3); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 27); + tmp |= (VFrontPorchStrt << 16) | VBottomBorderStrt; + STG_WRITE_REG(DACVerTim3, tmp); + + /* Set Verical and Horizontal Polarity */ + tmp = STG_READ_REG(DACSyncCtrl) | SET_BIT(3) | SET_BIT(1); + + if ((pTiming->HSP > 0) && (pTiming->VSP < 0)) { /* +hsync -vsync */ + tmp &= ~0x8; + } else if ((pTiming->HSP < 0) && (pTiming->VSP > 0)) { /* -hsync +vsync */ + tmp &= ~0x2; + } else if ((pTiming->HSP < 0) && (pTiming->VSP < 0)) { /* -hsync -vsync */ + tmp &= ~0xA; + } else if ((pTiming->HSP > 0) && (pTiming->VSP > 0)) { /* +hsync -vsync */ + tmp &= ~0x0; + } + + STG_WRITE_REG(DACSyncCtrl, tmp); +} |
