#include "atiadapter.h"
#include "atii2c.h"
#include "atiload.h"
#include "atimach64i2c.h"
#include "atistruct.h"
#include "xf86.h"
#define ATII2CDelay \
(*pI2CBus->I2CUDelay)(pI2CBus, pI2CBus->HoldTime)
#define ATII2CSCLDirOff \
if (pATII2C->SCLDir != 0) \
(*pATII2C->I2CSetBits)(pATII2C, pATI, \
pATII2C->I2CCur & ~pATII2C->SCLDir)
#define ATII2CSCLDirOn \
if (pATII2C->SCLDir != 0) \
(*pATII2C->I2CSetBits)(pATII2C, pATI, \
pATII2C->I2CCur | pATII2C->SCLDir)
#define ATII2CSDADirOff \
if (pATII2C->SDADir != 0) \
(*pATII2C->I2CSetBits)(pATII2C, pATI, \
pATII2C->I2CCur & ~pATII2C->SDADir)
#define ATII2CSDADirOn \
if (pATII2C->SDADir != 0) \
(*pATII2C->I2CSetBits)(pATII2C, pATI, \
pATII2C->I2CCur | pATII2C->SDADir)
#define ATII2CSCLBitGet \
((*pATII2C->I2CGetBits)(pATI) & pATII2C->SCLGet)
#define ATII2CSCLBitOff \
do \
{ \
(*pATII2C->I2CSetBits)(pATII2C, pATI, \
pATII2C->I2CCur & ~pATII2C->SCLSet); \
ATII2CDelay; \
} while (0)
#define ATII2CSCLBitOn \
do \
{ \
(*pATII2C->I2CSetBits)(pATII2C, pATI, \
pATII2C->I2CCur | pATII2C->SCLSet); \
do \
{ \
ATII2CDelay; \
} while (ATII2CSCLBitGet == 0); \
} while (0)
#define ATII2CSDABitGet \
((*pATII2C->I2CGetBits)(pATI) & pATII2C->SDAGet)
#define ATII2CSDABitOff \
do \
{ \
(*pATII2C->I2CSetBits)(pATII2C, pATI, \
pATII2C->I2CCur & ~pATII2C->SDASet); \
ATII2CDelay; \
} while (0)
#define ATII2CSDABitOn \
do \
{ \
(*pATII2C->I2CSetBits)(pATII2C, pATI, \
pATII2C->I2CCur | pATII2C->SDASet); \
ATII2CDelay; \
} while (0)
#define ATII2CSDABitSet(_flag) \
do \
{ \
if (_flag) \
ATII2CSDABitOn; \
else \
ATII2CSDABitOff; \
} while (0)
static Bool
ATII2CAddress
(
I2CDevPtr pI2CDev,
I2CSlaveAddr Address
)
{
I2CBusPtr pI2CBus = pI2CDev->pI2CBus;
ATII2CPtr pATII2C = pI2CBus->DriverPrivate.ptr;
ATIPtr pATI = pATII2C->pATI;
ATII2CSCLDirOn;
ATII2CSDADirOn;
ATII2CSDABitOn;
ATII2CSCLBitOn;
ATII2CSDABitOff;
ATII2CSCLBitOff;
if ((*pI2CBus->I2CPutByte)(pI2CDev, (I2CByte)Address))
{
if (((Address & 0x00F8U) != 0x00F0U) &&
((Address & 0x00FEU) != 0x0000U))
return TRUE;
if ((*pI2CBus->I2CPutByte)(pI2CDev, (I2CByte)(Address >> 8)))
return TRUE;
}
(*pI2CBus->I2CStop)(pI2CDev);
return FALSE;
}
static void
ATII2CStop
(
I2CDevPtr pI2CDev
)
{
I2CBusPtr pI2CBus = pI2CDev->pI2CBus;
ATII2CPtr pATII2C = pI2CBus->DriverPrivate.ptr;
ATIPtr pATI = pATII2C->pATI;
ATII2CSDADirOn;
ATII2CSDABitOff;
ATII2CSCLBitOn;
ATII2CSDABitOn;
ATII2CSCLBitOff;
ATII2CSCLDirOff;
ATII2CSDADirOff;
}
static Bool
ATII2CPutByte
(
I2CDevPtr pI2CDev,
I2CByte Data
)
{
I2CBusPtr pI2CBus = pI2CDev->pI2CBus;
ATII2CPtr pATII2C = pI2CBus->DriverPrivate.ptr;
ATIPtr pATI = pATII2C->pATI;
int i;
Bool Result;
ATII2CSDADirOn;
for (i = 0; i < 8; i++)
{
ATII2CSDABitSet(Data & 0x80U);
ATII2CSCLBitOn;
ATII2CSCLBitOff;
Data <<= 1;
}
ATII2CSDABitOn;
ATII2CSDADirOff;
ATII2CSCLBitOn;
if (ATII2CSDABitGet)
Result = FALSE;
else
Result = TRUE;
ATII2CSCLBitOff;
return Result;
}
static Bool
ATII2CGetByte
(
I2CDevPtr pI2CDev,
I2CByte *pData,
Bool Last
)
{
I2CBusPtr pI2CBus = pI2CDev->pI2CBus;
ATII2CPtr pATII2C = pI2CBus->DriverPrivate.ptr;
ATIPtr pATI = pATII2C->pATI;
unsigned long Value = 1;
do
{
ATII2CSCLBitOn;
Value <<= 1;
if (ATII2CSDABitGet)
Value++;
ATII2CSCLBitOff;
} while (Value <= (unsigned long)((I2CByte)(-1)));
*pData = (I2CByte)Value;
ATII2CSDADirOn;
ATII2CSDABitSet(Last);
ATII2CSCLBitOn;
ATII2CSCLBitOff;
if (!Last)
ATII2CSDABitOn;
ATII2CSDADirOff;
return TRUE;
}
I2CBusPtr
ATICreateI2CBusRec
(
int iScreen,
ATIPtr pATI,
char *BusName
)
{
I2CBusPtr pI2CBus;
ATII2CPtr pATII2C = xnfcalloc(1, SizeOf(ATII2CRec));
if (!(pI2CBus = xf86CreateI2CBusRec()))
{
xf86DrvMsg(iScreen, X_WARNING, "Unable to allocate I2C Bus record.\n");
xfree(pATII2C);
return NULL;
}
pI2CBus->BusName = BusName;
pI2CBus->scrnIndex = iScreen;
pI2CBus->I2CAddress = ATII2CAddress;
pI2CBus->I2CStop = ATII2CStop;
pI2CBus->I2CPutByte = ATII2CPutByte;
pI2CBus->I2CGetByte = ATII2CGetByte;
pI2CBus->DriverPrivate.ptr = pATII2C;
pATII2C->pATI = pATI;
if (xf86I2CBusInit(pI2CBus))
return pI2CBus;
xf86DrvMsg(iScreen, X_WARNING,
"I2C bus %s initialisation failure.\n", BusName);
xf86DestroyI2CBusRec(pI2CBus, TRUE, TRUE);
xfree(pATII2C);
return NULL;
}
void
ATII2CPreInit
(
ScrnInfoPtr pScreenInfo,
ATIPtr pATI
)
{
switch (pATI->Adapter)
{
case ATI_ADAPTER_MACH64:
if (!ATILoadModule(pScreenInfo, "i2c", ATIi2cSymbols))
return;
ATIMach64I2CPreInit(pScreenInfo, pATI);
break;
default:
break;
}
}
void
ATII2CFreeScreen
(
int iScreen
)
{
I2CBusPtr pI2CBus, *ppI2CBus;
ATII2CPtr pATII2C;
int nI2CBus;
nI2CBus = xf86I2CGetScreenBuses(iScreen, &ppI2CBus);
while (--nI2CBus >= 0)
{
pI2CBus = ppI2CBus[nI2CBus];
pATII2C = pI2CBus->DriverPrivate.ptr;
xf86DestroyI2CBusRec(pI2CBus, TRUE, TRUE);
xfree(pATII2C);
}
xfree(ppI2CBus);
}