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Steffen Gaisser
2021-04-27 17:22:34 +02:00
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/**
******************************************************************************
* @file lan8742.c
* @author MCD Application Team
* @brief This file provides a set of functions needed to manage the LAN742
* PHY devices.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "lan8742.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup Component
* @{
*/
/** @defgroup LAN8742 LAN8742
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @defgroup LAN8742_Private_Defines LAN8742 Private Defines
* @{
*/
#define LAN8742_SW_RESET_TO ((uint32_t)500U)
#define LAN8742_INIT_TO ((uint32_t)2000U)
#define LAN8742_MAX_DEV_ADDR ((uint32_t)31U)
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup LAN8742_Private_Functions LAN8742 Private Functions
* @{
*/
/**
* @brief Register IO functions to component object
* @param pObj: device object of LAN8742_Object_t.
* @param ioctx: holds device IO functions.
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_ERROR if missing mandatory function
*/
int32_t LAN8742_RegisterBusIO(lan8742_Object_t *pObj, lan8742_IOCtx_t *ioctx)
{
if(!pObj || !ioctx->ReadReg || !ioctx->WriteReg || !ioctx->GetTick)
{
return LAN8742_STATUS_ERROR;
}
pObj->IO.Init = ioctx->Init;
pObj->IO.DeInit = ioctx->DeInit;
pObj->IO.ReadReg = ioctx->ReadReg;
pObj->IO.WriteReg = ioctx->WriteReg;
pObj->IO.GetTick = ioctx->GetTick;
return LAN8742_STATUS_OK;
}
/**
* @brief Initialize the lan8742 and configure the needed hardware resources
* @param pObj: device object LAN8742_Object_t.
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_ADDRESS_ERROR if cannot find device address
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
* LAN8742_STATUS_RESET_TIMEOUT if cannot perform a software reset
*/
int32_t LAN8742_Init(lan8742_Object_t *pObj)
{
uint32_t tickstart = 0, regvalue = 0, addr = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->Is_Initialized == 0)
{
if(pObj->IO.Init != 0)
{
/* GPIO and Clocks initialization */
pObj->IO.Init();
}
/* for later check */
pObj->DevAddr = LAN8742_MAX_DEV_ADDR + 1;
/* Get the device address from special mode register */
for(addr = 0; addr <= LAN8742_MAX_DEV_ADDR; addr ++)
{
if(pObj->IO.ReadReg(addr, LAN8742_SMR, &regvalue) < 0)
{
status = LAN8742_STATUS_READ_ERROR;
/* Can't read from this device address
continue with next address */
continue;
}
if((regvalue & LAN8742_SMR_PHY_ADDR) == addr)
{
pObj->DevAddr = addr;
status = LAN8742_STATUS_OK;
break;
}
}
if(pObj->DevAddr > LAN8742_MAX_DEV_ADDR)
{
status = LAN8742_STATUS_ADDRESS_ERROR;
}
/* if device address is matched */
if(status == LAN8742_STATUS_OK)
{
/* set a software reset */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_BCR, LAN8742_BCR_SOFT_RESET) >= 0)
{
/* get software reset status */
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &regvalue) >= 0)
{
tickstart = pObj->IO.GetTick();
/* wait until software reset is done or timeout occured */
while(regvalue & LAN8742_BCR_SOFT_RESET)
{
if((pObj->IO.GetTick() - tickstart) <= LAN8742_SW_RESET_TO)
{
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &regvalue) < 0)
{
status = LAN8742_STATUS_READ_ERROR;
break;
}
}
else
{
status = LAN8742_STATUS_RESET_TIMEOUT;
break;
}
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
}
else
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
}
if(status == LAN8742_STATUS_OK)
{
tickstart = pObj->IO.GetTick();
/* Wait for 2s to perform initialization */
while((pObj->IO.GetTick() - tickstart) <= LAN8742_INIT_TO)
{
}
pObj->Is_Initialized = 1;
}
return status;
}
/**
* @brief De-Initialize the lan8742 and it's hardware resources
* @param pObj: device object LAN8742_Object_t.
* @retval None
*/
int32_t LAN8742_DeInit(lan8742_Object_t *pObj)
{
if(pObj->Is_Initialized)
{
if(pObj->IO.DeInit != 0)
{
if(pObj->IO.DeInit() < 0)
{
return LAN8742_STATUS_ERROR;
}
}
pObj->Is_Initialized = 0;
}
return LAN8742_STATUS_OK;
}
/**
* @brief Disable the LAN8742 power down mode.
* @param pObj: device object LAN8742_Object_t.
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_DisablePowerDownMode(lan8742_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &readval) >= 0)
{
readval &= ~LAN8742_BCR_POWER_DOWN;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_BCR, readval) < 0)
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Enable the LAN8742 power down mode.
* @param pObj: device object LAN8742_Object_t.
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_EnablePowerDownMode(lan8742_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &readval) >= 0)
{
readval |= LAN8742_BCR_POWER_DOWN;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_BCR, readval) < 0)
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Start the auto negotiation process.
* @param pObj: device object LAN8742_Object_t.
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_StartAutoNego(lan8742_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &readval) >= 0)
{
readval |= LAN8742_BCR_AUTONEGO_EN;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_BCR, readval) < 0)
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Get the link state of LAN8742 device.
* @param pObj: Pointer to device object.
* @param pLinkState: Pointer to link state
* @retval LAN8742_STATUS_LINK_DOWN if link is down
* LAN8742_STATUS_AUTONEGO_NOTDONE if Auto nego not completed
* LAN8742_STATUS_100MBITS_FULLDUPLEX if 100Mb/s FD
* LAN8742_STATUS_100MBITS_HALFDUPLEX if 100Mb/s HD
* LAN8742_STATUS_10MBITS_FULLDUPLEX if 10Mb/s FD
* LAN8742_STATUS_10MBITS_HALFDUPLEX if 10Mb/s HD
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_GetLinkState(lan8742_Object_t *pObj)
{
uint32_t readval = 0;
/* Read Status register */
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BSR, &readval) < 0)
{
return LAN8742_STATUS_READ_ERROR;
}
/* Read Status register again */
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BSR, &readval) < 0)
{
return LAN8742_STATUS_READ_ERROR;
}
if((readval & LAN8742_BSR_LINK_STATUS) == 0)
{
/* Return Link Down status */
return LAN8742_STATUS_LINK_DOWN;
}
/* Check Auto negotiaition */
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &readval) < 0)
{
return LAN8742_STATUS_READ_ERROR;
}
if((readval & LAN8742_BCR_AUTONEGO_EN) != LAN8742_BCR_AUTONEGO_EN)
{
if(((readval & LAN8742_BCR_SPEED_SELECT) == LAN8742_BCR_SPEED_SELECT) && ((readval & LAN8742_BCR_DUPLEX_MODE) == LAN8742_BCR_DUPLEX_MODE))
{
return LAN8742_STATUS_100MBITS_FULLDUPLEX;
}
else if ((readval & LAN8742_BCR_SPEED_SELECT) == LAN8742_BCR_SPEED_SELECT)
{
return LAN8742_STATUS_100MBITS_HALFDUPLEX;
}
else if ((readval & LAN8742_BCR_DUPLEX_MODE) == LAN8742_BCR_DUPLEX_MODE)
{
return LAN8742_STATUS_10MBITS_FULLDUPLEX;
}
else
{
return LAN8742_STATUS_10MBITS_HALFDUPLEX;
}
}
else /* Auto Nego enabled */
{
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_PHYSCSR, &readval) < 0)
{
return LAN8742_STATUS_READ_ERROR;
}
/* Check if auto nego not done */
if((readval & LAN8742_PHYSCSR_AUTONEGO_DONE) == 0)
{
return LAN8742_STATUS_AUTONEGO_NOTDONE;
}
if((readval & LAN8742_PHYSCSR_HCDSPEEDMASK) == LAN8742_PHYSCSR_100BTX_FD)
{
return LAN8742_STATUS_100MBITS_FULLDUPLEX;
}
else if ((readval & LAN8742_PHYSCSR_HCDSPEEDMASK) == LAN8742_PHYSCSR_100BTX_HD)
{
return LAN8742_STATUS_100MBITS_HALFDUPLEX;
}
else if ((readval & LAN8742_PHYSCSR_HCDSPEEDMASK) == LAN8742_PHYSCSR_10BT_FD)
{
return LAN8742_STATUS_10MBITS_FULLDUPLEX;
}
else
{
return LAN8742_STATUS_10MBITS_HALFDUPLEX;
}
}
}
/**
* @brief Set the link state of LAN8742 device.
* @param pObj: Pointer to device object.
* @param pLinkState: link state can be one of the following
* LAN8742_STATUS_100MBITS_FULLDUPLEX if 100Mb/s FD
* LAN8742_STATUS_100MBITS_HALFDUPLEX if 100Mb/s HD
* LAN8742_STATUS_10MBITS_FULLDUPLEX if 10Mb/s FD
* LAN8742_STATUS_10MBITS_HALFDUPLEX if 10Mb/s HD
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_ERROR if parameter error
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_SetLinkState(lan8742_Object_t *pObj, uint32_t LinkState)
{
uint32_t bcrvalue = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &bcrvalue) >= 0)
{
/* Disable link config (Auto nego, speed and duplex) */
bcrvalue &= ~(LAN8742_BCR_AUTONEGO_EN | LAN8742_BCR_SPEED_SELECT | LAN8742_BCR_DUPLEX_MODE);
if(LinkState == LAN8742_STATUS_100MBITS_FULLDUPLEX)
{
bcrvalue |= (LAN8742_BCR_SPEED_SELECT | LAN8742_BCR_DUPLEX_MODE);
}
else if (LinkState == LAN8742_STATUS_100MBITS_HALFDUPLEX)
{
bcrvalue |= LAN8742_BCR_SPEED_SELECT;
}
else if (LinkState == LAN8742_STATUS_10MBITS_FULLDUPLEX)
{
bcrvalue |= LAN8742_BCR_DUPLEX_MODE;
}
else
{
/* Wrong link status parameter */
status = LAN8742_STATUS_ERROR;
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
if(status == LAN8742_STATUS_OK)
{
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_BCR, bcrvalue) < 0)
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
return status;
}
/**
* @brief Enable loopback mode.
* @param pObj: Pointer to device object.
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_EnableLoopbackMode(lan8742_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &readval) >= 0)
{
readval |= LAN8742_BCR_LOOPBACK;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_BCR, readval) < 0)
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Disable loopback mode.
* @param pObj: Pointer to device object.
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_DisableLoopbackMode(lan8742_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_BCR, &readval) >= 0)
{
readval &= ~LAN8742_BCR_LOOPBACK;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_BCR, readval) < 0)
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Enable IT source.
* @param pObj: Pointer to device object.
* @param Interrupt: IT source to be enabled
* should be a value or a combination of the following:
* LAN8742_WOL_IT
* LAN8742_ENERGYON_IT
* LAN8742_AUTONEGO_COMPLETE_IT
* LAN8742_REMOTE_FAULT_IT
* LAN8742_LINK_DOWN_IT
* LAN8742_AUTONEGO_LP_ACK_IT
* LAN8742_PARALLEL_DETECTION_FAULT_IT
* LAN8742_AUTONEGO_PAGE_RECEIVED_IT
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_EnableIT(lan8742_Object_t *pObj, uint32_t Interrupt)
{
uint32_t readval = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_IMR, &readval) >= 0)
{
readval |= Interrupt;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_IMR, readval) < 0)
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Disable IT source.
* @param pObj: Pointer to device object.
* @param Interrupt: IT source to be disabled
* should be a value or a combination of the following:
* LAN8742_WOL_IT
* LAN8742_ENERGYON_IT
* LAN8742_AUTONEGO_COMPLETE_IT
* LAN8742_REMOTE_FAULT_IT
* LAN8742_LINK_DOWN_IT
* LAN8742_AUTONEGO_LP_ACK_IT
* LAN8742_PARALLEL_DETECTION_FAULT_IT
* LAN8742_AUTONEGO_PAGE_RECEIVED_IT
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_READ_ERROR if connot read register
* LAN8742_STATUS_WRITE_ERROR if connot write to register
*/
int32_t LAN8742_DisableIT(lan8742_Object_t *pObj, uint32_t Interrupt)
{
uint32_t readval = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_IMR, &readval) >= 0)
{
readval &= ~Interrupt;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, LAN8742_IMR, readval) < 0)
{
status = LAN8742_STATUS_WRITE_ERROR;
}
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Clear IT flag.
* @param pObj: Pointer to device object.
* @param Interrupt: IT flag to be cleared
* should be a value or a combination of the following:
* LAN8742_WOL_IT
* LAN8742_ENERGYON_IT
* LAN8742_AUTONEGO_COMPLETE_IT
* LAN8742_REMOTE_FAULT_IT
* LAN8742_LINK_DOWN_IT
* LAN8742_AUTONEGO_LP_ACK_IT
* LAN8742_PARALLEL_DETECTION_FAULT_IT
* LAN8742_AUTONEGO_PAGE_RECEIVED_IT
* @retval LAN8742_STATUS_OK if OK
* LAN8742_STATUS_READ_ERROR if connot read register
*/
int32_t LAN8742_ClearIT(lan8742_Object_t *pObj, uint32_t Interrupt)
{
uint32_t readval = 0;
int32_t status = LAN8742_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_ISFR, &readval) < 0)
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Get IT Flag status.
* @param pObj: Pointer to device object.
* @param Interrupt: IT Flag to be checked,
* should be a value or a combination of the following:
* LAN8742_WOL_IT
* LAN8742_ENERGYON_IT
* LAN8742_AUTONEGO_COMPLETE_IT
* LAN8742_REMOTE_FAULT_IT
* LAN8742_LINK_DOWN_IT
* LAN8742_AUTONEGO_LP_ACK_IT
* LAN8742_PARALLEL_DETECTION_FAULT_IT
* LAN8742_AUTONEGO_PAGE_RECEIVED_IT
* @retval 1 IT flag is SET
* 0 IT flag is RESET
* LAN8742_STATUS_READ_ERROR if connot read register
*/
int32_t LAN8742_GetITStatus(lan8742_Object_t *pObj, uint32_t Interrupt)
{
uint32_t readval = 0;
int32_t status = 0;
if(pObj->IO.ReadReg(pObj->DevAddr, LAN8742_ISFR, &readval) >= 0)
{
status = ((readval & Interrupt) == Interrupt);
}
else
{
status = LAN8742_STATUS_READ_ERROR;
}
return status;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/