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/*
* Copyright (c) 2009 NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "nvodm_services.h"
#include "nvassert.h"
#include "nvodm_gpio_ext.h"
#include "gpio_pcf50626.h"
#if NV_DEBUG
#define ASSERT_SUCCESS( expr ) \
do { \
NvBool b = (expr); \
NV_ASSERT( b == NV_TRUE ); \
} while( 0 )
#else
#define ASSERT_SUCCESS( expr ) \
do { \
(void)(expr); \
} while( 0 )
#endif
static NvOdmServicesI2cHandle s_hOdmI2c = NULL;
#define PCF50626_I2C_SPEED_KHZ 400
#define PCF50626_DEVICE_ADDR 0xE0
#define PCF50626_GPO2C1_ADDR 0x55
#define PCF50626_PWM1S_ADDR 0x2D
#define PCF50626_PWM1D_ADDR 0x2E
static NvBool GPIO_PCF50626_I2cWrite8(NvU8 Addr, NvU8 Data);
void
GPIO_PCF50626_NvOdmExternalGpioWritePins(
NvU32 Port,
NvU32 Pin,
NvU32 PinValue)
{
NvU8 val;
NvBool RetVal = NV_TRUE;
switch (Port)
{
case NVODM_GPIO_EXT_PORT_2:
if (Pin != 1) // Only Pin 1 is implemented at this time
break;
if (PinValue) // Enable
{
val = (1UL << 6) // invert polarity
| 0x3; // pwm1 output
RetVal = GPIO_PCF50626_I2cWrite8(PCF50626_GPO2C1_ADDR, val);
}
else // Disable
{
RetVal = GPIO_PCF50626_I2cWrite8(PCF50626_GPO2C1_ADDR, 0x0);
}
break;
}
if (RetVal == NV_FALSE)
{
NvOdmOsDebugPrintf("ERROR: GPIO_PCF50626_I2cWrite8() failed.\n");
}
return;
}
NvU32
GPIO_PCF50626_NvOdmExternalGpioReadPins(
NvU32 Port,
NvU32 Pin)
{
// Implement external GPIO port read routine here.
return 0;
}
static NvBool GPIO_PCF50626_I2cWrite8(
NvU8 Addr,
NvU8 Data)
{
NvBool RetVal = NV_TRUE;
NvU8 WriteBuffer[2];
NvOdmI2cStatus status = NvOdmI2cStatus_Success;
NvOdmI2cTransactionInfo TransactionInfo;
NvU32 DeviceAddr = (NvU32)PCF50626_DEVICE_ADDR;
s_hOdmI2c = NvOdmI2cOpen(NvOdmIoModule_I2c_Pmu, 0);
if (!s_hOdmI2c)
{
RetVal = NV_FALSE;
goto GPIO_PCF50626_I2cWrite8_exit;
}
WriteBuffer[0] = Addr & 0xFF; // PMU offset
WriteBuffer[1] = Data & 0xFF; // written data
TransactionInfo.Address = DeviceAddr;
TransactionInfo.Buf = WriteBuffer;
TransactionInfo.Flags = NVODM_I2C_IS_WRITE;
TransactionInfo.NumBytes = 2;
status = NvOdmI2cTransaction(s_hOdmI2c, &TransactionInfo, 1,
PCF50626_I2C_SPEED_KHZ, NV_WAIT_INFINITE);
if (status == NvOdmI2cStatus_Success)
RetVal = NV_TRUE;
else
RetVal = NV_FALSE;
GPIO_PCF50626_I2cWrite8_exit:
NvOdmI2cClose(s_hOdmI2c);
s_hOdmI2c = NULL;
return RetVal;
}
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