From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/video/fbdev/kyro/STG4000VTG.c | 170 ++++++++++++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 drivers/video/fbdev/kyro/STG4000VTG.c

(limited to 'drivers/video/fbdev/kyro/STG4000VTG.c')

diff --git a/drivers/video/fbdev/kyro/STG4000VTG.c b/drivers/video/fbdev/kyro/STG4000VTG.c
new file mode 100644
index 000000000..bd389709d
--- /dev/null
+++ b/drivers/video/fbdev/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 = 0, 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);
+}
-- 
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