NvBool NvOdmEcompassOpen(NvOdmEcompassHandle* hDevice)
{
NvU32 i;
NvOdmEcompassHandle hEcompass;
NvOdmIoModule IoModule = NvOdmIoModule_I2c;
const NvOdmPeripheralConnectivity *pConnectivity;
NvBool FoundGpio = NV_FALSE, FoundI2cModule = NV_FALSE;
hEcompass = NvOdmOsAlloc(sizeof(NvOdmEcompass));
if (hEcompass == NULL)
{
NVODMECOMPASS_PRINTF(("AKM8975 compass driver: Open fail\n"));
return NV_FALSE;
}
NvOdmOsMemset(hEcompass,0,sizeof(NvOdmEcompass));
hEcompass->nBusType = NV_ECOMPASS_BUS_I2C;
// Info of ecompass with current setting
pConnectivity = (NvOdmPeripheralConnectivity*)NvOdmPeripheralGetGuid(
ECOMPASS_GUID);
if (!pConnectivity)
{
NvOdmOsDebugPrintf(("NvOdmPeripheralGetGuid doesn't detect\
AKM8975/B device\n"));
goto error;
}
static NvBool
WriteReg(
NvOdmEcompassHandle hDevice,
NvU8 RegAddr,
NvU8* value,
NvU32 len)
{
NvOdmI2cTransactionInfo TransactionInfo;
if ( (NULL == hDevice) || (NULL == value) ||
(len > I2C_ECOMPASS_PACKET_SIZE-1 ) )
{
NVODMECOMPASS_PRINTF(("NvOdmI2c Set Regs Failed, max size is %d bytes\n", I2C_ECOMPASS_PACKET_SIZE-1));
return NV_FALSE;
}
s_WriteBuffer[0] = RegAddr;
NvOdmOsMemcpy(&s_WriteBuffer[1], value, len);
TransactionInfo.Address = hDevice->nDevAddr;
TransactionInfo.Buf = s_WriteBuffer;
TransactionInfo.Flags = NVODM_I2C_IS_WRITE;
TransactionInfo.NumBytes = len+1;
// Write the accelerator RegAddr (from where data is to be read).
if (NvOdmI2cTransaction(hDevice->hOdmI2C, &TransactionInfo, 1, NVODMECOMPASS_I2C_SPEED_KHZ,
I2C_ECOMPASS_TRANSACTION_TIMEOUT) != NvOdmI2cStatus_Success)
return NV_FALSE;
return NV_TRUE;
}
static NvBool ConnectSemaphore(NvOdmEcompassHandle hDevice)
{
NvOdmGpioPinMode mode;
NvOdmInterruptHandler callback =
(NvOdmInterruptHandler)GpioInterruptHandler;
hDevice->hGpioINT = (NvOdmServicesGpioHandle)NvOdmGpioOpen();
if (!(hDevice->hGpioINT))
{
NVODMECOMPASS_PRINTF(("AKM8975 compass driver: NvOdmGpioOpenError \n"));
return NV_FALSE;
}
hDevice->hPinINT = NvOdmGpioAcquirePinHandle(hDevice->hGpioINT,
hDevice->GPIOPortINT,
hDevice->GPIOPinINT);
hDevice->SemaphoreForINT = NvOdmOsSemaphoreCreate(0);
if (!(hDevice->SemaphoreForINT))
{
NVODMECOMPASS_PRINTF(( "AKM8975 compass driver: NvOdmOsSemaphoreCreate Error \n"));
NvOdmGpioClose(hDevice->hGpioINT);
return NV_FALSE;
}
mode = NvOdmGpioPinMode_InputInterruptHigh;
if (NvOdmGpioInterruptRegister(hDevice->hGpioINT,
&hDevice->hGpioInterrupt, hDevice->hPinINT, mode, callback,
hDevice, NV_DEBOUNCE_TIME_MS) == NV_FALSE)
{
return NV_FALSE;
}
if (!(hDevice->hGpioInterrupt))
{
NVODMECOMPASS_PRINTF(("AKM8975 compass driver: NvOdm Ecompass NvOdmGpioInterruptRegister Error \n"));
NvOdmGpioClose(hDevice->hGpioINT);
NvOdmOsSemaphoreDestroy(hDevice->SemaphoreForINT);
return NV_FALSE;
}
return NV_TRUE;
}
static NvBool AKM8975_Init(NvOdmEcompassHandle hEcompass){
NvU8 TestVal;
/* Check Connection */
if(!ReadReg(hEcompass,AK8975_REG_WIA,&TestVal, 1))
goto error;
if (TestVal!=0x48)
{
NVODMECOMPASS_PRINTF(("AKM8975 compass driver : Unknown ID 0x%x \n",TestVal));
goto error;
}
NVODMECOMPASS_PRINTF(("AKM8975 compass driver: ID is 0x%x \n",TestVal));
NVODMECOMPASS_PRINTF(("AKM8975 compass driver: Init Passed \n"));
return NV_TRUE;
error:
NVODMECOMPASS_PRINTF(("AKM8975 compass driver: Init Failed \n"));
return NV_FALSE;
}
static NvBool
akm8975_ReadXYZ(
NvOdmEcompassHandle hDevice,
NvS16* X,
NvS16* Y,
NvS16* Z)
{
NvU8 Data[13];
NvBool NewData = 0;
NvU8 i=0;
if (!ReadReg(hDevice, AK8975_REG_WIA, &Data[0], 1))
return NV_FALSE;
if (!ReadReg(hDevice, AK8975_REG_INFO, &Data[1], 1))
return NV_FALSE;
if (!ReadReg(hDevice, AK8975_REG_ST1, &Data[2], 1))
return NV_FALSE;
if (!ReadReg(hDevice, AK8975_REG_ST2, &Data[9], 1))
return NV_FALSE;
for (i=0;i<6;i++)
{
if (!ReadReg(hDevice, AK8975_REG_HXL+i, &Data[3+i], 1))
return NV_FALSE;
}
NewData = ((Data[0] == 0x48)&& !(Data[9] & 0x04) && (Data[2] & 0x01)) ? 1:0;
NVODMECOMPASS_PRINTF((" X: [%x] [%x] Y: [%x] [%x] Z: [%x] [%x]", Data[4],Data[3], Data[6], Data[5], Data[8], Data[7]));
*X = 0xFFFF;
*Y = 0xFFFF;
*Z = 0xFFFF;
return NewData;
}
static void GpioInterruptHandler(void *arg)
{
NvU32 pinValue;
NvU8 ret;
NvU8 buffer[SENSOR_DATA_SIZE];
NvU8 i;
NvOdmEcompassHandle hDevice = (NvOdmEcompassHandle)arg;
NvOdmGpioGetState(hDevice->hGpioINT, hDevice->hPinINT, &pinValue);
if (pinValue == 1)
{
ret=ReadReg(hDevice, AK8975_REG_ST1, buffer, SENSOR_DATA_SIZE);
if (ret<0) {
NVODMECOMPASS_PRINTF(("AKM8975 compass driver: I2C failed\n"));
return;
}
/* Check ST bit */
if ((buffer[0] & 0x01) != 0x01)
{
NVODMECOMPASS_PRINTF(("AKM8975 akm8975_work_func: ST is not set\n"));
return;
}
/* Check ST2 bit */
if (((buffer[7]&0x04)==0x04)||((buffer[7]&0x08)==0x08))
{
NVODMECOMPASS_PRINTF(("AKM8975 akm8975_work_func: Data is Fail\n"));
return;
}
NvOdmOsMemcpy(ecompass_buffer,buffer,SENSOR_DATA_SIZE);
#if 0
NVODMECOMPASS_PRINTF(("\n"));
NVODMECOMPASS_PRINTF((" GPIO handle :\n"));
for (i=0; i<SENSOR_DATA_SIZE; i++) {
NVODMECOMPASS_PRINTF((" Reg %d : [%02x]\n",i,ecompass_buffer[i]));
}
#endif
NvOdmOsSemaphoreSignal(hDevice->SemaphoreForINT);
}
NvOdmGpioInterruptDone(hDevice->hGpioInterrupt);
return;
}
static NvBool
ReadReg(
NvOdmEcompassHandle hDevice,
NvU8 RegAddr,
NvU8* value,
NvU32 len)
{
#if 0
NvOdmI2cTransactionInfo TransactionInfo;
if ( (NULL == hDevice) || (NULL == value) ||
(len > I2C_ECOMPASS_PACKET_SIZE-1 ) )
{
NVODMECOMPASS_PRINTF(("NvOdmI2c Get Regs Failed, max size is %d bytes\n", I2C_ECOMPASS_PACKET_SIZE-1));
return NV_FALSE;
}
s_WriteBuffer[0] = RegAddr;
TransactionInfo.Address = hDevice->nDevAddr;
TransactionInfo.Buf = s_WriteBuffer;
TransactionInfo.Flags = NVODM_I2C_IS_WRITE;
TransactionInfo.NumBytes = 1;
// Write the accelerometor RegAddr (from where data is to be read).
if (NvOdmI2cTransaction(hDevice->hOdmI2C, &TransactionInfo, 1, NVODMECOMPASS_I2C_SPEED_KHZ,
I2C_ECOMPASS_TRANSACTION_TIMEOUT) != NvOdmI2cStatus_Success)
return NV_FALSE;
s_ReadBuffer[0] = 0;
TransactionInfo.Address = (hDevice->nDevAddr| 0x1);
TransactionInfo.Buf = s_ReadBuffer;
TransactionInfo.Flags = 0;
TransactionInfo.NumBytes = len;
//Read the data from the eeprom at the specified RegAddr
if (NvOdmI2cTransaction(hDevice->hOdmI2C, &TransactionInfo, 1, NVODMECOMPASS_I2C_SPEED_KHZ,
I2C_ECOMPASS_TRANSACTION_TIMEOUT) != NvOdmI2cStatus_Success)
return NV_FALSE;
NvOdmOsMemcpy(value, &s_ReadBuffer[0], len);
return NV_TRUE;
#else
NvU32 i;
NvOdmI2cStatus status = NvOdmI2cStatus_Success;
NvOdmI2cTransactionInfo TransactionInfo[2];
if ( (NULL == hDevice) || (NULL == value) ||
(len > I2C_ECOMPASS_PACKET_SIZE-1 ) )
{
NVODMECOMPASS_PRINTF(("NvOdmI2c Get Regs Failed, max size is %d bytes\n", I2C_ECOMPASS_PACKET_SIZE-1));
return NV_FALSE;
}
for (i=0; i<NVODMECOMPASS_I2C_RETRY_CNT; i++)
{
NvU32 TransactionCount = 0;
s_WriteBuffer[0] = RegAddr;
TransactionInfo[TransactionCount].Address = hDevice->nDevAddr;
TransactionInfo[TransactionCount].Buf = &s_WriteBuffer[0];
TransactionInfo[TransactionCount].Flags =
NVODM_I2C_IS_WRITE | NVODM_I2C_USE_REPEATED_START;
TransactionInfo[TransactionCount++].NumBytes = 1;
s_ReadBuffer[0] = 0;
TransactionInfo[TransactionCount].Address = (hDevice->nDevAddr | 0x1);
TransactionInfo[TransactionCount].Buf = &s_ReadBuffer[0];
TransactionInfo[TransactionCount].Flags = 0;
TransactionInfo[TransactionCount++].NumBytes = len;
status = NvOdmI2cTransaction(hDevice->hOdmI2C, &TransactionInfo[0],
TransactionCount, NVODMECOMPASS_I2C_SPEED_KHZ, NV_WAIT_INFINITE);
if (status == NvOdmI2cStatus_Success)
{
NvOdmOsMemcpy(value, &s_ReadBuffer[0], len);
return NV_TRUE;
}
}
// Transaction Error
switch (status)
{
case NvOdmI2cStatus_Timeout:
NVODMECOMPASS_PRINTF(("NvOdmEcompassI2cRead Failed: Timeout\n"));
break;
case NvOdmI2cStatus_SlaveNotFound:
default:
NVODMECOMPASS_PRINTF(("NvOdmEcompassI2cRead Failed: SlaveNotFound\n"));
break;
}
return NV_FALSE;
#endif
}
