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diff --git a/src/atii2c.c b/src/atii2c.c
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-/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atii2c.c,v 1.2 2003/08/29 21:07:57 tsi Exp $ */
-/*
- * Copyright 2003 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that copyright
- * notice and this permission notice appear in supporting documentation, and
- * that the name of Marc Aurele La France not be used in advertising or
- * publicity pertaining to distribution of the software without specific,
- * written prior permission. Marc Aurele La France makes no representations
- * about the suitability of this software for any purpose. It is provided
- * "as-is" without express or implied warranty.
- *
- * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
- * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
- * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include "atiadapter.h"
-#include "atii2c.h"
-#include "atiload.h"
-#include "atimach64i2c.h"
-#include "atistruct.h"
-
-#include "xf86.h"
-
-/* This is derived from GATOS code, with a liberal sprinkling of bug fixes */
-
-/*
- * Some local macros for use by the mid-level I2C functions.
- */
-
-#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 /* Wait until all devices have released SCL */ \
- { \
- 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)
-
-
-/*
- * ATII2CAddress --
- *
- * This function puts a Start bit and an 8-bit address on the I2C bus.
- */
-static Bool
-ATII2CAddress
-(
- I2CDevPtr pI2CDev,
- I2CSlaveAddr Address
-)
-{
- I2CBusPtr pI2CBus = pI2CDev->pI2CBus;
- ATII2CPtr pATII2C = pI2CBus->DriverPrivate.ptr;
- ATIPtr pATI = pATII2C->pATI;
-
- /*
- * Set I2C line directions to out-bound. SCL will remain out-bound until
- * next I2C Stop.
- */
- ATII2CSCLDirOn;
- ATII2CSDADirOn;
-
- /*
- * Send Start bit. This is a pull-down of the data line while the clock
- * line is pulled up.
- */
- ATII2CSDABitOn;
- ATII2CSCLBitOn;
- ATII2CSDABitOff;
- ATII2CSCLBitOff;
-
- /* Send low byte of device address */
- if ((*pI2CBus->I2CPutByte)(pI2CDev, (I2CByte)Address))
- {
- /* Send top byte of address, if appropriate */
- if (((Address & 0x00F8U) != 0x00F0U) &&
- ((Address & 0x00FEU) != 0x0000U))
- return TRUE;
-
- if ((*pI2CBus->I2CPutByte)(pI2CDev, (I2CByte)(Address >> 8)))
- return TRUE;
- }
-
- /* Kill I2C transaction on failure */
- (*pI2CBus->I2CStop)(pI2CDev);
- return FALSE;
-}
-
-/*
- * ATII2CStop --
- *
- * This function puts a stop signal on the I2C bus.
- */
-static void
-ATII2CStop
-(
- I2CDevPtr pI2CDev
-)
-{
- I2CBusPtr pI2CBus = pI2CDev->pI2CBus;
- ATII2CPtr pATII2C = pI2CBus->DriverPrivate.ptr;
- ATIPtr pATI = pATII2C->pATI;
-
- ATII2CSDADirOn; /* Set data line direction to out-bound */
-
- /*
- * Send Stop bit. This is a pull-up of the data line while the clock line
- * is pulled up.
- */
- ATII2CSDABitOff;
- ATII2CSCLBitOn;
- ATII2CSDABitOn;
- ATII2CSCLBitOff;
-
- /* Reset I2C line directions to in-bound */
- ATII2CSCLDirOff;
- ATII2CSDADirOff;
-}
-
-/*
- * ATII2CPutByte --
- *
- * This function puts an 8-bit value on the I2C bus, starting with its MSB.
- */
-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; /* Set data line direction to out-bound */
-
- /* Send data byte */
- for (i = 0; i < 8; i++)
- {
- ATII2CSDABitSet(Data & 0x80U);
- ATII2CSCLBitOn;
- ATII2CSCLBitOff;
-
- Data <<= 1;
- }
-
- ATII2CSDABitOn; /* Release data line */
-
- ATII2CSDADirOff; /* Set data line direction to in-bound */
-
- ATII2CSCLBitOn; /* Start bit-read clock pulse */
-
- /* Get [N]ACK bit */
- if (ATII2CSDABitGet)
- Result = FALSE;
- else
- Result = TRUE;
-
- ATII2CSCLBitOff; /* End clock pulse */
-
- return Result;
-}
-
-/*
- * ATII2CGetByte --
- *
- * This function retrieves an 8-bit value from the I2C bus.
- */
-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; /* Start bit-read clock pulse */
-
- /* Accumulate bit into byte value */
- Value <<= 1;
- if (ATII2CSDABitGet)
- Value++;
-
- ATII2CSCLBitOff; /* End clock pulse */
- } while (Value <= (unsigned long)((I2CByte)(-1)));
-
- *pData = (I2CByte)Value;
-
- ATII2CSDADirOn; /* Set data line direction to out-bound */
-
- /* Send [N]ACK bit */
- ATII2CSDABitSet(Last);
- ATII2CSCLBitOn;
- ATII2CSCLBitOff;
-
- if (!Last)
- ATII2CSDABitOn; /* Release data line */
-
- ATII2CSDADirOff; /* Set data line direction to in-bound */
-
- return TRUE;
-}
-
-/*
- * ATICreateI2CBusRec --
- *
- * This function is called to initialise an I2CBusRec.
- */
-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;
- }
-
- /* Fill in generic structure fields */
- 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;
-}
-
-/*
- * ATII2CPreInit --
- *
- * This is called by ATIPreInit() to create I2C bus record(s) for the adapter.
- */
-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;
- }
-}
-
-/*
- * ATII2CFreeScreen --
- *
- * This is called by ATIFreeScreen() to remove the driver's I2C interface.
- */
-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);
-}
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