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rt-thread/bsp/nuvoton/libraries/n9h30/Driver/Source/nu_emac.c

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Update N9H30 porting.
2021-05-12 19:15:17 +08:00
/**************************************************************************//**
* @file emac.c
* @version V1.00
* @brief M480 EMAC driver source file
*
* SPDX-License-Identifier: Apache-2.0
* @copyright (C) 2016-2020 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include <stdio.h>
#include <string.h>
#include "NuMicro.h"
/** @addtogroup Standard_Driver Standard Driver
@{
*/
/** @addtogroup EMAC_Driver EMAC Driver
@{
*/
/* Below are structure, definitions, static variables used locally by EMAC driver and does not want to parse by doxygen unless HIDDEN_SYMBOLS is defined */
/** @cond HIDDEN_SYMBOLS */
/** @addtogroup EMAC_EXPORTED_CONSTANTS EMAC Exported Constants
@{
*/
/* PHY Register Description */
#define PHY_CNTL_REG 0x00UL /*!< PHY control register address */
#define PHY_STATUS_REG 0x01UL /*!< PHY status register address */
#define PHY_ID1_REG 0x02UL /*!< PHY ID1 register */
#define PHY_ID2_REG 0x03UL /*!< PHY ID2 register */
#define PHY_ANA_REG 0x04UL /*!< PHY auto-negotiation advertisement register */
#define PHY_ANLPA_REG 0x05UL /*!< PHY auto-negotiation link partner availability register */
#define PHY_ANE_REG 0x06UL /*!< PHY auto-negotiation expansion register */
/* PHY Control Register */
#define PHY_CNTL_RESET_PHY (1UL << 15UL)
#define PHY_CNTL_DR_100MB (1UL << 13UL)
#define PHY_CNTL_ENABLE_AN (1UL << 12UL)
#define PHY_CNTL_POWER_DOWN (1UL << 11UL)
#define PHY_CNTL_RESTART_AN (1UL << 9UL)
#define PHY_CNTL_FULLDUPLEX (1UL << 8UL)
/* PHY Status Register */
#define PHY_STATUS_AN_COMPLETE (1UL << 5UL)
#define PHY_STATUS_LINK_VALID (1UL << 2UL)
/* PHY Auto-negotiation Advertisement Register */
#define PHY_ANA_DR100_TX_FULL (1UL << 8UL)
#define PHY_ANA_DR100_TX_HALF (1UL << 7UL)
#define PHY_ANA_DR10_TX_FULL (1UL << 6UL)
#define PHY_ANA_DR10_TX_HALF (1UL << 5UL)
#define PHY_ANA_IEEE_802_3_CSMA_CD (1UL << 0UL)
/* PHY Auto-negotiation Link Partner Advertisement Register */
#define PHY_ANLPA_DR100_TX_FULL (1UL << 8UL)
#define PHY_ANLPA_DR100_TX_HALF (1UL << 7UL)
#define PHY_ANLPA_DR10_TX_FULL (1UL << 6UL)
#define PHY_ANLPA_DR10_TX_HALF (1UL << 5UL)
/* EMAC Tx/Rx descriptor's owner bit */
#define EMAC_DESC_OWN_EMAC 0x80000000UL /*!< Set owner to EMAC */
#define EMAC_DESC_OWN_CPU 0x00000000UL /*!< Set owner to CPU */
/* Rx Frame Descriptor Status */
#define EMAC_RXFD_RTSAS 0x0080UL /*!< Time Stamp Available */
#define EMAC_RXFD_RP 0x0040UL /*!< Runt Packet */
#define EMAC_RXFD_ALIE 0x0020UL /*!< Alignment Error */
#define EMAC_RXFD_RXGD 0x0010UL /*!< Receiving Good packet received */
#define EMAC_RXFD_PTLE 0x0008UL /*!< Packet Too Long Error */
#define EMAC_RXFD_CRCE 0x0002UL /*!< CRC Error */
#define EMAC_RXFD_RXINTR 0x0001UL /*!< Interrupt on receive */
/* Tx Frame Descriptor's Control bits */
#define EMAC_TXFD_TTSEN 0x08UL /*!< Tx time stamp enable */
#define EMAC_TXFD_INTEN 0x04UL /*!< Tx interrupt enable */
#define EMAC_TXFD_CRCAPP 0x02UL /*!< Append CRC */
#define EMAC_TXFD_PADEN 0x01UL /*!< Padding mode enable */
/* Tx Frame Descriptor Status */
#define EMAC_TXFD_TXINTR 0x0001UL /*!< Interrupt on Transmit */
#define EMAC_TXFD_DEF 0x0002UL /*!< Transmit deferred */
#define EMAC_TXFD_TXCP 0x0008UL /*!< Transmission Completion */
#define EMAC_TXFD_EXDEF 0x0010UL /*!< Exceed Deferral */
#define EMAC_TXFD_NCS 0x0020UL /*!< No Carrier Sense Error */
#define EMAC_TXFD_TXABT 0x0040UL /*!< Transmission Abort */
#define EMAC_TXFD_LC 0x0080UL /*!< Late Collision */
#define EMAC_TXFD_TXHA 0x0100UL /*!< Transmission halted */
#define EMAC_TXFD_PAU 0x0200UL /*!< Paused */
#define EMAC_TXFD_SQE 0x0400UL /*!< SQE error */
#define EMAC_TXFD_TTSAS 0x0800UL /*!< Time Stamp available */
/*@}*/ /* end of group EMAC_EXPORTED_CONSTANTS */
/** @addtogroup EMAC_EXPORTED_TYPEDEF EMAC Exported Type Defines
@{
*/
/*@}*/ /* end of group EMAC_EXPORTED_TYPEDEF */
/* local variables */
static uint32_t s_u32EnableTs = 0UL;
static void EMAC_MdioWrite(EMAC_T *EMAC, uint32_t u32Reg, uint32_t u32Addr, uint32_t u32Data);
static uint32_t EMAC_MdioRead(EMAC_T *EMAC, uint32_t u32Reg, uint32_t u32Addr);
static uint32_t EMAC_Subsec2Nsec(uint32_t subsec);
static uint32_t EMAC_Nsec2Subsec(uint32_t nsec);
static void EMAC_TxDescInit(EMAC_MEMMGR_T *psMemMgr);
static void EMAC_RxDescInit(EMAC_MEMMGR_T *psMemMgr);
/** @addtogroup EMAC_EXPORTED_FUNCTIONS EMAC Exported Functions
@{
*/
/**
* @brief Write PHY register
* @param[in] u32Reg PHY register number
* @param[in] u32Addr PHY address, this address is board dependent
* @param[in] u32Data data to write to PHY register
* @return None
*/
static void EMAC_MdioWrite(EMAC_T *EMAC, uint32_t u32Reg, uint32_t u32Addr, uint32_t u32Data)
{
/* Set data register */
EMAC->MIIMDAT = u32Data ;
/* Set PHY address, PHY register address, busy bit and write bit */
EMAC->MIIMCTL = u32Reg | (u32Addr << 8) | EMAC_MIIMCTL_BUSY_Msk | EMAC_MIIMCTL_WRITE_Msk | EMAC_MIIMCTL_MDCON_Msk;
/* Wait write complete by polling busy bit. */
while (EMAC->MIIMCTL & EMAC_MIIMCTL_BUSY_Msk)
{
;
}
}
/**
* @brief Read PHY register
* @param[in] u32Reg PHY register number
* @param[in] u32Addr PHY address, this address is board dependent
* @return Value read from PHY register
*/
static uint32_t EMAC_MdioRead(EMAC_T *EMAC, uint32_t u32Reg, uint32_t u32Addr)
{
/* Set PHY address, PHY register address, busy bit */
EMAC->MIIMCTL = u32Reg | (u32Addr << EMAC_MIIMCTL_PHYADDR_Pos) | EMAC_MIIMCTL_BUSY_Msk | EMAC_MIIMCTL_MDCON_Msk;
/* Wait read complete by polling busy bit */
while (EMAC->MIIMCTL & EMAC_MIIMCTL_BUSY_Msk)
{
;
}
/* Get return data */
return EMAC->MIIMDAT;
}
void EMAC_Reset(EMAC_T *EMAC)
{
/* Reset MAC */
EMAC->CTL = 0x1000000;
}
/**
* @brief Initialize PHY chip, check for the auto-negotiation result.
* @param None
* @return None
*/
void EMAC_PhyInit(EMAC_T *EMAC)
{
uint32_t reg;
uint32_t i = 0UL;
/* Reset Phy Chip */
EMAC_MdioWrite(EMAC, PHY_CNTL_REG, EMAC_PHY_ADDR, PHY_CNTL_RESET_PHY);
/* Wait until reset complete */
while (1)
{
reg = EMAC_MdioRead(EMAC, PHY_CNTL_REG, EMAC_PHY_ADDR) ;
if ((reg & PHY_CNTL_RESET_PHY) == 0UL)
{
break;
}
}
while (!(EMAC_MdioRead(EMAC, PHY_STATUS_REG, EMAC_PHY_ADDR) & PHY_STATUS_LINK_VALID))
{
if (i++ > 10000UL) /* Cable not connected */
{
EMAC->CTL &= ~EMAC_CTL_OPMODE_Msk;
EMAC->CTL &= ~EMAC_CTL_FUDUP_Msk;
break;
}
}
if (i <= 10000UL)
{
/* Configure auto negotiation capability */
EMAC_MdioWrite(EMAC, PHY_ANA_REG, EMAC_PHY_ADDR, PHY_ANA_DR100_TX_FULL |
PHY_ANA_DR100_TX_HALF |
PHY_ANA_DR10_TX_FULL |
PHY_ANA_DR10_TX_HALF |
PHY_ANA_IEEE_802_3_CSMA_CD);
/* Restart auto negotiation */
EMAC_MdioWrite(EMAC, PHY_CNTL_REG, EMAC_PHY_ADDR, EMAC_MdioRead(EMAC, PHY_CNTL_REG, EMAC_PHY_ADDR) | PHY_CNTL_RESTART_AN);
/* Wait for auto-negotiation complete */
while (!(EMAC_MdioRead(EMAC, PHY_STATUS_REG, EMAC_PHY_ADDR) & PHY_STATUS_AN_COMPLETE))
{
;
}
/* Check link valid again. Some PHYs needs to check result after link valid bit set */
while (!(EMAC_MdioRead(EMAC, PHY_STATUS_REG, EMAC_PHY_ADDR) & PHY_STATUS_LINK_VALID))
{
;
}
/* Check link partner capability */
reg = EMAC_MdioRead(EMAC, PHY_ANLPA_REG, EMAC_PHY_ADDR) ;
if (reg & PHY_ANLPA_DR100_TX_FULL)
{
EMAC->CTL |= EMAC_CTL_OPMODE_Msk;
EMAC->CTL |= EMAC_CTL_FUDUP_Msk;
}
else if (reg & PHY_ANLPA_DR100_TX_HALF)
{
EMAC->CTL |= EMAC_CTL_OPMODE_Msk;
EMAC->CTL &= ~EMAC_CTL_FUDUP_Msk;
}
else if (reg & PHY_ANLPA_DR10_TX_FULL)
{
EMAC->CTL &= ~EMAC_CTL_OPMODE_Msk;
EMAC->CTL |= EMAC_CTL_FUDUP_Msk;
}
else
{
EMAC->CTL &= ~EMAC_CTL_OPMODE_Msk;
EMAC->CTL &= ~EMAC_CTL_FUDUP_Msk;
}
}
}
/**
* @brief Initial EMAC Tx descriptors and get Tx descriptor base address
* @param EMAC_MEMMGR_T pointer
* @return None
*/
static void EMAC_TxDescInit(EMAC_MEMMGR_T *psMemMgr)
{
uint32_t i;
/* Get Frame descriptor's base address. */
psMemMgr->psNextTxDesc = psMemMgr->psCurrentTxDesc = (EMAC_DESCRIPTOR_T *)((uint32_t)&psMemMgr->psTXDescs[0] | BIT31);
for (i = 0UL; i < psMemMgr->u32TxDescSize; i++)
{
if (s_u32EnableTs)
{
psMemMgr->psTXDescs[i].u32Status1 = EMAC_TXFD_PADEN | EMAC_TXFD_CRCAPP | EMAC_TXFD_INTEN;
}
else
{
psMemMgr->psTXDescs[i].u32Status1 = EMAC_TXFD_PADEN | EMAC_TXFD_CRCAPP | EMAC_TXFD_INTEN | EMAC_TXFD_TTSEN;
}
psMemMgr->psTXDescs[i].u32Data = (uint32_t)& psMemMgr->psTXFrames[i] | BIT31;
psMemMgr->psTXDescs[i].u32Status2 = 0UL;
psMemMgr->psTXDescs[i].u32Next = (uint32_t)(&psMemMgr->psTXDescs[(i + 1UL) % EMAC_TX_DESC_SIZE]) | BIT31;
psMemMgr->psTXDescs[i].u32Backup1 = psMemMgr->psTXDescs[i].u32Data;
psMemMgr->psTXDescs[i].u32Backup2 = psMemMgr->psTXDescs[i].u32Next;
}
psMemMgr->psEmac->TXDSA = (uint32_t)psMemMgr->psCurrentTxDesc;
}
/**
* @brief Initial EMAC Rx descriptors and get Rx descriptor base address
* @param EMAC_MEMMGR_T pointer
* @return None
*/
static void EMAC_RxDescInit(EMAC_MEMMGR_T *psMemMgr)
{
uint32_t i;
/* Get Frame descriptor's base address. */
psMemMgr->psCurrentRxDesc = (EMAC_DESCRIPTOR_T *)((uint32_t)&psMemMgr->psRXDescs[0] | BIT31);
for (i = 0UL; i < psMemMgr->u32RxDescSize; i++)
{
psMemMgr->psRXDescs[i].u32Status1 = EMAC_DESC_OWN_EMAC;
psMemMgr->psRXDescs[i].u32Data = (uint32_t)&psMemMgr->psRXFrames[i] | BIT31;
psMemMgr->psRXDescs[i].u32Status2 = 0UL;
psMemMgr->psRXDescs[i].u32Next = (uint32_t)(&psMemMgr->psRXDescs[(i + 1UL) % EMAC_RX_DESC_SIZE]) | BIT31;
psMemMgr->psRXDescs[i].u32Backup1 = psMemMgr->psRXDescs[i].u32Data;
psMemMgr->psRXDescs[i].u32Backup2 = psMemMgr->psRXDescs[i].u32Next;
}
psMemMgr->psEmac->RXDSA = (uint32_t)psMemMgr->psCurrentRxDesc;
}
/**
* @brief Convert subsecond value to nano second
* @param[in] subsec Subsecond value to be convert
* @return Nano second
*/
static uint32_t EMAC_Subsec2Nsec(uint32_t subsec)
{
/* 2^31 subsec == 10^9 ns */
uint64_t i;
i = 1000000000ull * (uint64_t)subsec;
i >>= 31;
return ((uint32_t)i);
}
/**
* @brief Convert nano second to subsecond value
* @param[in] nsec Nano second to be convert
* @return Subsecond
*/
static uint32_t EMAC_Nsec2Subsec(uint32_t nsec)
{
/* 10^9 ns = 2^31 subsec */
uint64_t i;
i = (1ull << 31) * nsec;
i /= 1000000000ull;
return ((uint32_t)i);
}
/*@}*/ /* end of group EMAC_EXPORTED_FUNCTIONS */
/** @endcond HIDDEN_SYMBOLS */
/** @addtogroup EMAC_EXPORTED_FUNCTIONS EMAC Exported Functions
@{
*/
/**
* @brief Initialize EMAC interface, including descriptors, MAC address, and PHY.
* @param[in] pu8MacAddr Pointer to uint8_t array holds MAC address
* @return None
* @note This API configures EMAC to receive all broadcast and multicast packets, but could configure to other settings with
* \ref EMAC_ENABLE_RECV_BCASTPKT, \ref EMAC_DISABLE_RECV_BCASTPKT, \ref EMAC_ENABLE_RECV_MCASTPKT, and \ref EMAC_DISABLE_RECV_MCASTPKT
* @note Receive(RX) and transmit(TX) are not enabled yet, application must call \ref EMAC_ENABLE_RX and \ref EMAC_ENABLE_TX to
* enable receive and transmit function.
*/
void EMAC_Open(EMAC_MEMMGR_T *psMemMgr, uint8_t *pu8MacAddr)
{
EMAC_T *EMAC = psMemMgr->psEmac;
/* Enable transmit and receive descriptor */
EMAC_TxDescInit(psMemMgr);
EMAC_RxDescInit(psMemMgr);
/* Set the CAM Control register and the MAC address value */
EMAC_SetMacAddr(EMAC, pu8MacAddr);
/* Configure the MAC interrupt enable register. */
EMAC->INTEN = EMAC_INTEN_RXIEN_Msk |
EMAC_INTEN_TXIEN_Msk |
EMAC_INTEN_RXGDIEN_Msk |
EMAC_INTEN_TXCPIEN_Msk |
EMAC_INTEN_RXBEIEN_Msk |
EMAC_INTEN_TXBEIEN_Msk |
EMAC_INTEN_RDUIEN_Msk |
EMAC_INTEN_TSALMIEN_Msk |
EMAC_INTEN_WOLIEN_Msk;
/* Configure the MAC control register. */
EMAC->CTL = EMAC_CTL_STRIPCRC_Msk |
EMAC_CTL_RMIIEN_Msk;
/* Accept packets for us and all broadcast and multicast packets */
EMAC->CAMCTL = EMAC_CAMCTL_CMPEN_Msk |
EMAC_CAMCTL_AMP_Msk |
EMAC_CAMCTL_ABP_Msk;
/* Limit the max receive frame length */
EMAC->MRFL = EMAC_MAX_PKT_SIZE;
}
/**
* @brief This function stop all receive and transmit activity and disable MAC interface
* @param None
* @return None
*/
void EMAC_Close(EMAC_T *EMAC)
{
EMAC->CTL |= EMAC_CTL_RST_Msk;
while (EMAC->CTL & EMAC_CTL_RST_Msk) {}
}
/**
* @brief Set the device MAC address
* @param[in] pu8MacAddr Pointer to uint8_t array holds MAC address
* @return None
*/
void EMAC_SetMacAddr(EMAC_T *EMAC, uint8_t *pu8MacAddr)
{
EMAC_EnableCamEntry(EMAC, 0UL, pu8MacAddr);
}
/**
* @brief Fill a CAM entry for MAC address comparison.
* @param[in] u32Entry MAC entry to fill. Entry 0 is used to store device MAC address, do not overwrite the setting in it.
* @param[in] pu8MacAddr Pointer to uint8_t array holds MAC address
* @return None
*/
void EMAC_EnableCamEntry(EMAC_T *EMAC, uint32_t u32Entry, uint8_t pu8MacAddr[])
{
uint32_t u32Lsw, u32Msw;
uint32_t reg;
u32Lsw = (uint32_t)(((uint32_t)pu8MacAddr[4] << 24) |
((uint32_t)pu8MacAddr[5] << 16));
u32Msw = (uint32_t)(((uint32_t)pu8MacAddr[0] << 24) |
((uint32_t)pu8MacAddr[1] << 16) |
((uint32_t)pu8MacAddr[2] << 8) |
(uint32_t)pu8MacAddr[3]);
reg = (uint32_t)&EMAC->CAM0M + u32Entry * 2UL * 4UL;
*(uint32_t volatile *)reg = u32Msw;
reg = (uint32_t)&EMAC->CAM0L + u32Entry * 2UL * 4UL;
*(uint32_t volatile *)reg = u32Lsw;
EMAC->CAMEN |= (1UL << u32Entry);
}
/**
* @brief Disable a specified CAM entry
* @param[in] u32Entry CAM entry to be disabled
* @return None
*/
void EMAC_DisableCamEntry(EMAC_T *EMAC, uint32_t u32Entry)
{
EMAC->CAMEN &= ~(1UL << u32Entry);
}
/**
* @brief Receive an Ethernet packet
* @param[in] pu8Data Pointer to a buffer to store received packet (4 byte CRC removed)
* @param[in] pu32Size Received packet size (without 4 byte CRC).
* @return Packet receive success or not
* @retval 0 No packet available for receive
* @retval 1 A packet is received
* @note Return 0 doesn't guarantee the packet will be sent and received successfully.
*/
uint32_t EMAC_RecvPkt(EMAC_MEMMGR_T *psMemMgr, uint8_t *pu8Data, uint32_t *pu32Size)
{
uint32_t reg;
uint32_t u32Count = 0UL;
EMAC_T *EMAC = psMemMgr->psEmac;
/* Clear Rx interrupt flags */
reg = EMAC->INTSTS;
EMAC->INTSTS = reg & 0xFFFFUL; /* Clear all RX related interrupt status */
if (reg & EMAC_INTSTS_RXBEIF_Msk)
{
/* Bus error occurred, this is usually a bad sign about software bug and will occur again... */
while (1) {}
}
else
{
/* Get Rx Frame Descriptor */
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psCurrentRxDesc;
/* If we reach last recv Rx descriptor, leave the loop */
if ((desc->u32Status1 & EMAC_DESC_OWN_EMAC) != EMAC_DESC_OWN_EMAC) /* ownership=CPU */
{
uint32_t status = desc->u32Status1 >> 16;
/* If Rx frame is good, process received frame */
if (status & EMAC_RXFD_RXGD)
{
/* lower 16 bit in descriptor status1 stores the Rx packet length */
*pu32Size = desc->u32Status1 & 0xFFFFUL;
memcpy(pu8Data, (uint8_t *)desc->u32Data, *pu32Size);
u32Count = 1UL;
}
else
{
/* Save Error status if necessary */
if (status & EMAC_RXFD_RP) {}
if (status & EMAC_RXFD_ALIE) {}
if (status & EMAC_RXFD_PTLE) {}
if (status & EMAC_RXFD_CRCE) {}
}
}
}
return (u32Count);
}
/**
* @brief Receive an Ethernet packet and the time stamp while it's received
* @param[out] pu8Data Pointer to a buffer to store received packet (4 byte CRC removed)
* @param[out] pu32Size Received packet size (without 4 byte CRC).
* @param[out] pu32Sec Second value while packet received
* @param[out] pu32Nsec Nano second value while packet received
* @return Packet receive success or not
* @retval 0 No packet available for receive
* @retval 1 A packet is received
* @note Return 0 doesn't guarantee the packet will be sent and received successfully.
* @note Largest Ethernet packet is 1514 bytes after stripped CRC, application must give
* a buffer large enough to store such packet
*/
uint32_t EMAC_RecvPktTS(EMAC_MEMMGR_T *psMemMgr, uint8_t *pu8Data, uint32_t *pu32Size, uint32_t *pu32Sec, uint32_t *pu32Nsec)
{
EMAC_T *EMAC = psMemMgr->psEmac;
uint32_t reg;
uint32_t u32Count = 0UL;
/* Clear Rx interrupt flags */
reg = EMAC->INTSTS;
EMAC->INTSTS = reg & 0xFFFFUL; /* Clear all Rx related interrupt status */
if (reg & EMAC_INTSTS_RXBEIF_Msk)
{
/* Bus error occurred, this is usually a bad sign about software bug and will occur again... */
while (1) {}
}
else
{
/* Get Rx Frame Descriptor */
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psCurrentRxDesc;
/* If we reach last recv Rx descriptor, leave the loop */
if (EMAC->CRXDSA != (uint32_t)desc)
{
if ((desc->u32Status1 | EMAC_DESC_OWN_EMAC) != EMAC_DESC_OWN_EMAC) /* ownership=CPU */
{
uint32_t status = desc->u32Status1 >> 16;
/* If Rx frame is good, process received frame */
if (status & EMAC_RXFD_RXGD)
{
/* lower 16 bit in descriptor status1 stores the Rx packet length */
*pu32Size = desc->u32Status1 & 0xFFFFUL;
memcpy(pu8Data, (uint8_t *)desc->u32Data, *pu32Size);
*pu32Sec = desc->u32Next; /* second stores in descriptor's NEXT field */
*pu32Nsec = EMAC_Subsec2Nsec(desc->u32Data); /* Sub nano second store in DATA field */
u32Count = 1UL;
}
else
{
/* Save Error status if necessary */
if (status & EMAC_RXFD_RP) {}
if (status & EMAC_RXFD_ALIE) {}
if (status & EMAC_RXFD_PTLE) {}
if (status & EMAC_RXFD_CRCE) {}
}
}
}
}
return (u32Count);
}
/**
* @brief Clean up process after a packet is received
* @param None
* @return None
* @details EMAC Rx interrupt service routine \b must call this API to release the resource use by receive process
* @note Application can only call this function once every time \ref EMAC_RecvPkt or \ref EMAC_RecvPktTS returns 1
*/
void EMAC_RecvPktDone(EMAC_MEMMGR_T *psMemMgr)
{
EMAC_T *EMAC = psMemMgr->psEmac;
/* Get Rx Frame Descriptor */
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psCurrentRxDesc;
/* Restore descriptor link list and data pointer they will be overwrite if time stamp enabled */
desc->u32Data = desc->u32Backup1;
desc->u32Next = desc->u32Backup2;
/* Change ownership to DMA for next use */
desc->u32Status1 |= EMAC_DESC_OWN_EMAC;
/* Get Next Frame Descriptor pointer to process */
desc = (EMAC_DESCRIPTOR_T *)desc->u32Next;
/* Save last processed Rx descriptor */
psMemMgr->psCurrentRxDesc = desc;
EMAC_TRIGGER_RX(EMAC);
}
/**
* @brief Send an Ethernet packet
* @param[in] pu8Data Pointer to a buffer holds the packet to transmit
* @param[in] u32Size Packet size (without 4 byte CRC).
* @return Packet transmit success or not
* @retval 0 Transmit failed due to descriptor unavailable.
* @retval 1 Packet is copied to descriptor and triggered to transmit.
* @note Return 1 doesn't guarantee the packet will be sent and received successfully.
*/
uint32_t EMAC_SendPkt(EMAC_MEMMGR_T *psMemMgr, uint8_t *pu8Data, uint32_t u32Size)
{
EMAC_T *EMAC = psMemMgr->psEmac;
/* Get Tx frame descriptor & data pointer */
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psNextTxDesc;
uint32_t status = desc->u32Status1;
uint32_t ret = 0UL;
/* Check descriptor ownership */
if ((status & EMAC_DESC_OWN_EMAC) != EMAC_DESC_OWN_EMAC)
{
memcpy((uint8_t *)desc->u32Data, pu8Data, u32Size);
/* Set Tx descriptor transmit byte count */
desc->u32Status2 = u32Size;
/* Change descriptor ownership to EMAC */
desc->u32Status1 |= EMAC_DESC_OWN_EMAC;
/* Get next Tx descriptor */
psMemMgr->psNextTxDesc = (EMAC_DESCRIPTOR_T *)(desc->u32Next);
/* Trigger EMAC to send the packet */
EMAC_TRIGGER_TX(EMAC);
ret = 1UL;
}
return (ret);
}
/**
* @brief Clean up process after packet(s) are sent
* @param None
* @return Number of packet sent between two function calls
* @details EMAC Tx interrupt service routine \b must call this API or \ref EMAC_SendPktDoneTS to
* release the resource use by transmit process
*/
uint32_t EMAC_SendPktDone(EMAC_MEMMGR_T *psMemMgr)
{
EMAC_T *EMAC = psMemMgr->psEmac;
uint32_t status, reg;
uint32_t last_tx_desc;
uint32_t u32Count = 0UL;
reg = EMAC->INTSTS;
/* Clear Tx interrupt flags */
EMAC->INTSTS = reg & (0xFFFF0000UL & ~EMAC_INTSTS_TSALMIF_Msk);
if (reg & EMAC_INTSTS_TXBEIF_Msk)
{
/* Bus error occurred, this is usually a bad sign about software bug and will occur again... */
while (1) {}
}
else
{
/* Get our first descriptor to process */
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psCurrentTxDesc;
/* Process the descriptor(s). */
last_tx_desc = EMAC->CTXDSA ;
do
{
/* Descriptor ownership is still EMAC, so this packet haven't been send. */
if (desc->u32Status1 & EMAC_DESC_OWN_EMAC)
{
break;
}
/* Get Tx status stored in descriptor */
status = desc->u32Status2 >> 16UL;
if (status & EMAC_TXFD_TXCP)
{
u32Count++;
}
else
{
/* Do nothing here on error. */
if (status & EMAC_TXFD_TXABT) {}
if (status & EMAC_TXFD_DEF) {}
if (status & EMAC_TXFD_PAU) {}
if (status & EMAC_TXFD_EXDEF) {}
if (status & EMAC_TXFD_NCS) {}
if (status & EMAC_TXFD_SQE) {}
if (status & EMAC_TXFD_LC) {}
if (status & EMAC_TXFD_TXHA) {}
}
/* restore descriptor link list and data pointer they will be overwrite if time stamp enabled */
desc->u32Data = desc->u32Backup1;
desc->u32Next = desc->u32Backup2;
/* go to next descriptor in link */
desc = (EMAC_DESCRIPTOR_T *)desc->u32Next;
}
while (last_tx_desc != (uint32_t)desc); /* If we reach last sent Tx descriptor, leave the loop */
/* Save last processed Tx descriptor */
psMemMgr->psCurrentTxDesc = (EMAC_DESCRIPTOR_T *)desc;
}
return (u32Count);
}
/**
* @brief Clean up process after a packet is sent, and get the time stamp while packet is sent
* @param[in] pu32Sec Second value while packet sent
* @param[in] pu32Nsec Nano second value while packet sent
* @return If a packet sent successfully
* @retval 0 No packet sent successfully, and the value in *pu32Sec and *pu32Nsec are meaningless
* @retval 1 A packet sent successfully, and the value in *pu32Sec and *pu32Nsec is the time stamp while packet sent
* @details EMAC Tx interrupt service routine \b must call this API or \ref EMAC_SendPktDone to
* release the resource use by transmit process
*/
uint32_t EMAC_SendPktDoneTS(EMAC_MEMMGR_T *psMemMgr, uint32_t *pu32Sec, uint32_t *pu32Nsec)
{
EMAC_T *EMAC = psMemMgr->psEmac;
uint32_t reg;
uint32_t u32Count = 0UL;
reg = EMAC->INTSTS;
/* Clear Tx interrupt flags */
EMAC->INTSTS = reg & (0xFFFF0000UL & ~EMAC_INTSTS_TSALMIF_Msk);
if (reg & EMAC_INTSTS_TXBEIF_Msk)
{
/* Bus error occurred, this is usually a bad sign about software bug and will occur again... */
while (1) {}
}
else
{
/* Process the descriptor.
Get our first descriptor to process */
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psCurrentTxDesc;
/* Descriptor ownership is still EMAC, so this packet haven't been send. */
if ((desc->u32Status1 & EMAC_DESC_OWN_EMAC) != EMAC_DESC_OWN_EMAC)
{
/* Get Tx status stored in descriptor */
uint32_t status = desc->u32Status2 >> 16UL;
if (status & EMAC_TXFD_TXCP)
{
u32Count = 1UL;
*pu32Sec = desc->u32Next; /* second stores in descriptor's NEXT field */
*pu32Nsec = EMAC_Subsec2Nsec(desc->u32Data); /* Sub nano second store in DATA field */
}
else
{
/* Do nothing here on error. */
if (status & EMAC_TXFD_TXABT) {}
if (status & EMAC_TXFD_DEF) {}
if (status & EMAC_TXFD_PAU) {}
if (status & EMAC_TXFD_EXDEF) {}
if (status & EMAC_TXFD_NCS) {}
if (status & EMAC_TXFD_SQE) {}
if (status & EMAC_TXFD_LC) {}
if (status & EMAC_TXFD_TXHA) {}
}
/* restore descriptor link list and data pointer they will be overwrite if time stamp enabled */
desc->u32Data = desc->u32Backup1;
desc->u32Next = desc->u32Backup2;
/* go to next descriptor in link */
desc = (EMAC_DESCRIPTOR_T *)desc->u32Next;
/* Save last processed Tx descriptor */
psMemMgr->psCurrentTxDesc = desc;
}
}
return (u32Count);
}
/**
* @brief Enable IEEE1588 time stamp function and set current time
* @param[in] u32Sec Second value
* @param[in] u32Nsec Nano second value
* @return None
*/
void EMAC_EnableTS(EMAC_T *EMAC, uint32_t u32Sec, uint32_t u32Nsec)
{
#if 0
double f;
uint32_t reg;
EMAC->TSCTL = EMAC_TSCTL_TSEN_Msk;
EMAC->UPDSEC = u32Sec; /* Assume current time is 0 sec + 0 nano sec */
EMAC->UPDSUBSEC = EMAC_Nsec2Subsec(u32Nsec);
/* PTP source clock is 160MHz (Real chip using PLL). Each tick is 6.25ns
Assume we want to set each tick to 100ns.
Increase register = (100 * 2^31) / (10^9) = 214.71 =~ 215 = 0xD7
Addend register = 2^32 * tick_freq / (160MHz), where tick_freq = (2^31 / 215) MHz
From above equation, addend register = 2^63 / (160M * 215) ~= 268121280 = 0xFFB34C0
So:
EMAC->TSIR = 0xD7;
EMAC->TSAR = 0x1E70C600; */
f = (100.0 * 2147483648.0) / (1000000000.0) + 0.5;
EMAC->TSINC = (reg = (uint32_t)f);
f = (double)9223372036854775808.0 / ((double)(CLK_GetHCLKFreq()) * (double)reg);
EMAC->TSADDEND = (uint32_t)f;
EMAC->TSCTL |= (EMAC_TSCTL_TSUPDATE_Msk | EMAC_TSCTL_TSIEN_Msk | EMAC_TSCTL_TSMODE_Msk); /* Fine update */
#endif
}
/**
* @brief Disable IEEE1588 time stamp function
* @param None
* @return None
*/
void EMAC_DisableTS(EMAC_T *EMAC)
{
#if 0
EMAC->TSCTL = 0UL;
#endif
}
/**
* @brief Get current time stamp
* @param[out] pu32Sec Current second value
* @param[out] pu32Nsec Current nano second value
* @return None
*/
void EMAC_GetTime(EMAC_T *EMAC, uint32_t *pu32Sec, uint32_t *pu32Nsec)
{
/* Must read TSLSR firstly. Hardware will preserve TSMSR value at the time TSLSR read. */
*pu32Nsec = EMAC_Subsec2Nsec(EMAC->TSSUBSEC);
*pu32Sec = EMAC->TSSEC;
}
/**
* @brief Set current time stamp
* @param[in] u32Sec Second value
* @param[in] u32Nsec Nano second value
* @return None
*/
void EMAC_SetTime(EMAC_T *EMAC, uint32_t u32Sec, uint32_t u32Nsec)
{
/* Disable time stamp counter before update time value (clear EMAC_TSCTL_TSIEN_Msk) */
EMAC->TSCTL = EMAC_TSCTL_TSEN_Msk;
EMAC->UPDSEC = u32Sec;
EMAC->UPDSUBSEC = EMAC_Nsec2Subsec(u32Nsec);
EMAC->TSCTL |= (EMAC_TSCTL_TSIEN_Msk | EMAC_TSCTL_TSMODE_Msk);
}
/**
* @brief Enable alarm function and set alarm time
* @param[in] u32Sec Second value to trigger alarm
* @param[in] u32Nsec Nano second value to trigger alarm
* @return None
*/
void EMAC_EnableAlarm(EMAC_T *EMAC, uint32_t u32Sec, uint32_t u32Nsec)
{
EMAC->ALMSEC = u32Sec;
EMAC->ALMSUBSEC = EMAC_Nsec2Subsec(u32Nsec);
EMAC->TSCTL |= EMAC_TSCTL_TSALMEN_Msk;
}
/**
* @brief Disable alarm function
* @param None
* @return None
*/
void EMAC_DisableAlarm(EMAC_T *EMAC)
{
EMAC->TSCTL &= ~EMAC_TSCTL_TSALMEN_Msk;
}
/**
* @brief Add a offset to current time
* @param[in] u32Neg Offset is negative value (u32Neg == 1) or positive value (u32Neg == 0).
* @param[in] u32Sec Second value to add to current time
* @param[in] u32Nsec Nano second value to add to current time
* @return None
*/
void EMAC_UpdateTime(EMAC_T *EMAC, uint32_t u32Neg, uint32_t u32Sec, uint32_t u32Nsec)
{
EMAC->UPDSEC = u32Sec;
EMAC->UPDSUBSEC = EMAC_Nsec2Subsec(u32Nsec);
if (u32Neg)
{
EMAC->UPDSUBSEC |= BIT31; /* Set bit 31 indicates this is a negative value */
}
EMAC->TSCTL |= EMAC_TSCTL_TSUPDATE_Msk;
}
/**
* @brief Check Ethernet link status
* @param None
* @return Current link status, could be one of following value.
* - \ref EMAC_LINK_DOWN
* - \ref EMAC_LINK_100F
* - \ref EMAC_LINK_100H
* - \ref EMAC_LINK_10F
* - \ref EMAC_LINK_10H
* @note This API should be called regularly to sync EMAC setting with real connection status
*/
uint32_t EMAC_CheckLinkStatus(EMAC_T *EMAC)
{
uint32_t reg, ret = EMAC_LINK_DOWN;
/* Check link valid again */
if (EMAC_MdioRead(EMAC, PHY_STATUS_REG, EMAC_PHY_ADDR) & PHY_STATUS_LINK_VALID)
{
/* Check link partner capability */
reg = EMAC_MdioRead(EMAC, PHY_ANLPA_REG, EMAC_PHY_ADDR) ;
if (reg & PHY_ANLPA_DR100_TX_FULL)
{
EMAC->CTL |= EMAC_CTL_OPMODE_Msk;
EMAC->CTL |= EMAC_CTL_FUDUP_Msk;
ret = EMAC_LINK_100F;
}
else if (reg & PHY_ANLPA_DR100_TX_HALF)
{
EMAC->CTL |= EMAC_CTL_OPMODE_Msk;
EMAC->CTL &= ~EMAC_CTL_FUDUP_Msk;
ret = EMAC_LINK_100H;
}
else if (reg & PHY_ANLPA_DR10_TX_FULL)
{
EMAC->CTL &= ~EMAC_CTL_OPMODE_Msk;
EMAC->CTL |= EMAC_CTL_FUDUP_Msk;
ret = EMAC_LINK_10F;
}
else
{
EMAC->CTL &= ~EMAC_CTL_OPMODE_Msk;
EMAC->CTL &= ~EMAC_CTL_FUDUP_Msk;
ret = EMAC_LINK_10H;
}
}
return ret;
}
/**
* @brief Fill a MAC address to list and enable.
* @param A MAC address
* @return The CAM index
* @retval -1 Failed to fill the MAC address.
* @retval 0~(EMAC_CAMENTRY_NB-1) The index number of entry location.
*/
int32_t EMAC_FillCamEntry(EMAC_T *EMAC, uint8_t pu8MacAddr[])
{
uint32_t *EMAC_CAMxM;
uint32_t *EMAC_CAMxL;
int32_t index;
uint8_t mac[6];
for (index = 0; index < EMAC_CAMENTRY_NB; index ++)
{
EMAC_CAMxM = (uint32_t *)((uint32_t)&EMAC->CAM0M + (index * 8));
EMAC_CAMxL = (uint32_t *)((uint32_t)&EMAC->CAM0L + (index * 8));
mac[0] = (*EMAC_CAMxM >> 24) & 0xff;
mac[1] = (*EMAC_CAMxM >> 16) & 0xff;
mac[2] = (*EMAC_CAMxM >> 8) & 0xff;
mac[3] = (*EMAC_CAMxM) & 0xff;
mac[4] = (*EMAC_CAMxL >> 24) & 0xff;
mac[5] = (*EMAC_CAMxL >> 16) & 0xff;
if (memcmp(mac, pu8MacAddr, sizeof(mac)) == 0)
{
goto exit_emac_fillcamentry;
}
if (*EMAC_CAMxM == 0 && *EMAC_CAMxL == 0)
{
break;
}
}
if (index < EMAC_CAMENTRY_NB)
{
EMAC_EnableCamEntry(EMAC, index, pu8MacAddr);
goto exit_emac_fillcamentry;
}
return -1;
exit_emac_fillcamentry:
return index;
}
/**
* @brief Send an Ethernet packet
* @param[in] u32Size Packet size (without 4 byte CRC).
* @return Packet transmit success or not
* @retval 0 Transmit failed due to descriptor unavailable.
* @retval 1 Triggered to transmit.
* @note Return 1 doesn't guarantee the packet will be sent and received successfully.
*/
uint32_t EMAC_SendPktWoCopy(EMAC_MEMMGR_T *psMemMgr, uint32_t u32Size)
{
EMAC_T *EMAC = psMemMgr->psEmac;
/* Get Tx frame descriptor & data pointer */
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psNextTxDesc;
uint32_t status = desc->u32Status1;
uint32_t ret = 0UL;
/* Check descriptor ownership */
if ((status & EMAC_DESC_OWN_EMAC) != EMAC_DESC_OWN_EMAC)
{
/* Set Tx descriptor transmit byte count */
desc->u32Status2 = u32Size;
/* Change descriptor ownership to EMAC */
desc->u32Status1 |= EMAC_DESC_OWN_EMAC;
/* Get next Tx descriptor */
psMemMgr->psNextTxDesc = (EMAC_DESCRIPTOR_T *)(desc->u32Next);
/* Trigger EMAC to send the packet */
EMAC_TRIGGER_TX(EMAC);
ret = 1UL;
}
return (ret);
}
/**
* @brief Get avaiable TX buffer address
* @param None
* @return An avaiable TX buffer.
* @note This API should be called before EMAC_SendPkt_WoCopy calling. Caller will do data-copy.
*/
uint8_t *EMAC_ClaimFreeTXBuf(EMAC_MEMMGR_T *psMemMgr)
{
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psNextTxDesc;
if (desc->u32Status1 & EMAC_DESC_OWN_EMAC)
{
return (NULL);
}
else
{
return (uint8_t *)desc->u32Data;
}
}
/**
* @brief Get data length of avaiable RX buffer.
* @param None
* @return An data length of avaiable RX buffer.
* @note This API should be called before EMAC_RecvPktDone_WoTrigger calling. Caller will do data-copy.
*/
uint32_t EMAC_GetAvailRXBufSize(EMAC_MEMMGR_T *psMemMgr, uint8_t **ppuDataBuf)
{
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psCurrentRxDesc;
if ((desc->u32Status1 & EMAC_DESC_OWN_EMAC) != EMAC_DESC_OWN_EMAC) /* ownership=CPU */
{
uint32_t status = desc->u32Status1 >> 16;
/* It is good and no CRC error. */
if ((status & EMAC_RXFD_RXGD) && !(status & EMAC_RXFD_CRCE))
{
*ppuDataBuf = (uint8_t *)desc->u32Data;
return desc->u32Status1 & 0xFFFFUL;
}
else
{
// Drop it
EMAC_RecvPktDone(psMemMgr);
}
}
return 0;
}
/**
* @brief Clean up process after a packet is received.
* @param None
* @return None
* @details Caller must call the function to release the resource.
* @note Application can only call this function once every time \ref EMAC_RecvPkt or \ref EMAC_RecvPktTS returns 1
* @note This function is without doing EMAC_TRIGGER_RX.
*/
void EMAC_RecvPktDoneWoRxTrigger(EMAC_MEMMGR_T *psMemMgr)
{
/* Get Rx Frame Descriptor */
EMAC_DESCRIPTOR_T *desc = (EMAC_DESCRIPTOR_T *)psMemMgr->psCurrentRxDesc;
/* Restore descriptor link list and data pointer they will be overwrite if time stamp enabled */
desc->u32Data = desc->u32Backup1;
desc->u32Next = desc->u32Backup2;
/* Change ownership to DMA for next use */
desc->u32Status1 |= EMAC_DESC_OWN_EMAC;
/* Get Next Frame Descriptor pointer to process */
desc = (EMAC_DESCRIPTOR_T *)desc->u32Next;
/* Save last processed Rx descriptor */
psMemMgr->psCurrentRxDesc = desc;
}
/*@}*/ /* end of group EMAC_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group EMAC_Driver */
/*@}*/ /* end of group Standard_Driver */
/*** (C) COPYRIGHT 2016 Nuvoton Technology Corp. ***/