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