1 files changed, 115 insertions, 0 deletions
diff --git a/src/smi_i2c.c b/src/smi_i2c.c
new file mode 100644
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--- /dev/null
+++ b/src/smi_i2c.c
@@ -0,0 +1,115 @@
+/* Header:   //Mercury/Projects/archives/XFree86/4.0/smi_i2c.c-arc   1.10   27 Nov 2000 15:47:58   Frido  $ */
+
+/*
+Copyright (C) 1994-2000 The XFree86 Project, Inc.  All Rights Reserved.
+Copyright (C) 2000 Silicon Motion, Inc.  All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
+NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the names of the XFree86 Project and
+Silicon Motion shall not be used in advertising or otherwise to promote the
+sale, use or other dealings in this Software without prior written
+authorization from the XFree86 Project and Silicon Motion.
+*/
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/siliconmotion/smi_i2c.c,v 1.2 2001/12/20 21:35:39 eich Exp $ */
+
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86_ansic.h"
+#include "compiler.h"
+#include "xf86Pci.h"
+#include "xf86PciInfo.h"
+#include "vgaHW.h"
+
+#include "smi.h"
+
+#undef VERBLEV
+#undef ENTER_PROC
+#undef DEBUG_PROC
+#undef LEAVE_PROC
+#undef DEBUG
+#define VERBLEV 2
+#define ENTER_PROC(PROCNAME)
+#define DEBUG_PROC(PROCNAME)
+#define LEAVE_PROC(PROCNAME)
+#define DEBUG(arg)
+
+static void
+SMI_I2CPutBits(I2CBusPtr b, int clock,  int data)
+{
+	SMIPtr pSmi = SMIPTR(xf86Screens[b->scrnIndex]);
+	unsigned int reg = 0x30;
+
+	ENTER_PROC("SMI_I2CPutBits");
+
+	if (clock) reg |= 0x01;
+	if (data)  reg |= 0x02;
+
+	VGAOUT8_INDEX(pSmi, VGA_SEQ_INDEX, VGA_SEQ_DATA, 0x72, reg);
+
+	LEAVE_PROC("SMI_I2CPutBits");
+}
+
+static void
+SMI_I2CGetBits(I2CBusPtr b, int *clock, int *data)
+{
+	SMIPtr pSmi = SMIPTR(xf86Screens[b->scrnIndex]);
+	unsigned int reg = VGAIN8_INDEX(pSmi, VGA_SEQ_INDEX, VGA_SEQ_DATA, 0x72);
+
+	ENTER_PROC("SMI_I2CGetBits");
+
+	*clock = reg & 0x04;
+	*data  = reg & 0x08;
+
+	LEAVE_PROC("SMI_I2CGetBits");
+}
+
+Bool
+SMI_I2CInit(ScrnInfoPtr pScrn)
+{
+	SMIPtr pSmi = SMIPTR(pScrn);
+
+	ENTER_PROC("SMI_I2CInit");
+
+	if (pSmi->I2C == NULL)
+	{
+		I2CBusPtr I2CPtr = xf86CreateI2CBusRec();
+		if (I2CPtr == NULL)
+		{
+			LEAVE_PROC("SMI_I2CInit");
+			return(FALSE);
+		}
+
+		I2CPtr->BusName    = "I2C bus";
+		I2CPtr->scrnIndex  = pScrn->scrnIndex;
+		I2CPtr->I2CPutBits = SMI_I2CPutBits;
+		I2CPtr->I2CGetBits = SMI_I2CGetBits;
+
+		if (!xf86I2CBusInit(I2CPtr))
+		{
+			xf86DestroyI2CBusRec(I2CPtr, TRUE, TRUE);
+			LEAVE_PROC("SMI_I2CInit");
+			return(FALSE);
+		}
+
+		pSmi->I2C = I2CPtr;
+	}
+
+	LEAVE_PROC("SMI_I2CInit");
+	return(TRUE);
+}