/** ****************************************************************************** * File Name : ethernetif.c * Description : This file provides code for the configuration * of the ethernetif.c MiddleWare. ****************************************************************************** * This notice applies to any and all portions of this file * that are not between comment pairs USER CODE BEGIN and * USER CODE END. Other portions of this file, whether * inserted by the user or by software development tools * are owned by their respective copyright owners. * * Copyright (c) 2018 STMicroelectronics International N.V. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted, provided that the following conditions are met: * * 1. Redistribution of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of other * contributors to this software may be used to endorse or promote products * derived from this software without specific written permission. * 4. This software, including modifications and/or derivative works of this * software, must execute solely and exclusively on microcontroller or * microprocessor devices manufactured by or for STMicroelectronics. * 5. Redistribution and use of this software other than as permitted under * this license is void and will automatically terminate your rights under * this license. * * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "lwip/opt.h" #include "lwip/mem.h" #include "lwip/memp.h" #include "lwip/timeouts.h" #include "netif/ethernet.h" #include "netif/etharp.h" #include "lwip/ethip6.h" #include "ethernetif.h" #include #include /* Network interface name */ #define IFNAME0 's' #define IFNAME1 't' /* Private variables ---------------------------------------------------------*/ #if defined ( __ICCARM__ ) /*!< IAR Compiler */ #pragma data_alignment=4 #endif __ALIGN_BEGIN ETH_DMADescTypeDef DMARxDscrTab[ETH_RXBUFNB] __ALIGN_END;/* Ethernet Rx MA Descriptor */ #if defined ( __ICCARM__ ) /*!< IAR Compiler */ #pragma data_alignment=4 #endif __ALIGN_BEGIN ETH_DMADescTypeDef DMATxDscrTab[ETH_TXBUFNB] __ALIGN_END;/* Ethernet Tx DMA Descriptor */ #if defined ( __ICCARM__ ) /*!< IAR Compiler */ #pragma data_alignment=4 #endif __ALIGN_BEGIN uint8_t Rx_Buff[ETH_RXBUFNB][ETH_RX_BUF_SIZE] __ALIGN_END; /* Ethernet Receive Buffer */ #if defined ( __ICCARM__ ) /*!< IAR Compiler */ #pragma data_alignment=4 #endif __ALIGN_BEGIN uint8_t Tx_Buff[ETH_TXBUFNB][ETH_TX_BUF_SIZE] __ALIGN_END; /* Ethernet Transmit Buffer */ /* Global Ethernet handle */ ETH_HandleTypeDef heth; ETH_HandleTypeDef* getEthStruct() { return &heth; } /******************************************************************************* LL Driver Interface ( LwIP stack --> ETH) *******************************************************************************/ /** * In this function, the hardware should be initialized. * Called from ethernetif_init(). * * @param netif the already initialized lwip network interface structure * for this ethernetif */ static void low_level_init(struct netif *netif) { uint32_t regvalue = 0; HAL_StatusTypeDef hal_eth_init_status; uint8_t MACAddr[6] ; heth.Instance = ETH; heth.Init.AutoNegotiation = ETH_AUTONEGOTIATION_ENABLE; heth.Init.PhyAddress = LAN8742A_PHY_ADDRESS; MACAddr[0] = 0x00; MACAddr[1] = 0x80; MACAddr[2] = 0xE1; MACAddr[3] = 0x00; MACAddr[4] = 0x00; MACAddr[5] = 0x02; heth.Init.MACAddr = &MACAddr[0]; heth.Init.RxMode = ETH_RXPOLLING_MODE; heth.Init.ChecksumMode = ETH_CHECKSUM_BY_HARDWARE; heth.Init.MediaInterface = ETH_MEDIA_INTERFACE_RMII; printf("LAN8742A PHYAD: 0x0\r\r\n"); printf("Setting MACaddr: %02x:%02x:%02x:%02x:%02x:%02x\r\r\n", MACAddr[0], MACAddr[1], MACAddr[2], MACAddr[3], MACAddr[4], MACAddr[5]); printf("LAN8742A interface is RMII\r\r\n"); hal_eth_init_status = HAL_ETH_Init(&heth); if (hal_eth_init_status == HAL_OK) { /* Set netif link flag */ netif->flags |= NETIF_FLAG_LINK_UP; } /* Initialize Tx Descriptors list: Chain Mode */ HAL_ETH_DMATxDescListInit(&heth, DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB); /* Initialize Rx Descriptors list: Chain Mode */ HAL_ETH_DMARxDescListInit(&heth, DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB); #if LWIP_ARP || LWIP_ETHERNET /* set MAC hardware address length */ netif->hwaddr_len = ETH_HWADDR_LEN; /* set MAC hardware address */ netif->hwaddr[0] = heth.Init.MACAddr[0]; netif->hwaddr[1] = heth.Init.MACAddr[1]; netif->hwaddr[2] = heth.Init.MACAddr[2]; netif->hwaddr[3] = heth.Init.MACAddr[3]; netif->hwaddr[4] = heth.Init.MACAddr[4]; netif->hwaddr[5] = heth.Init.MACAddr[5]; /* maximum transfer unit */ netif->mtu = 1500; /* Accept broadcast address and ARP traffic */ /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */ #if LWIP_ARP netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP; #else netif->flags |= NETIF_FLAG_BROADCAST; #endif /* LWIP_ARP */ /* Enable MAC and DMA transmission and reception */ HAL_ETH_Start(&heth); printf("Starting Ethernet IRQ/DMA..\r\r\n"); /* Read Register Configuration */ HAL_ETH_ReadPHYRegister(&heth, PHY_ISFR, ®value); regvalue |= (PHY_ISFR_INT4); /* Enable Interrupt on change of link status */ HAL_ETH_WritePHYRegister(&heth, PHY_ISFR , regvalue ); /* Read Register Configuration */ HAL_ETH_ReadPHYRegister(&heth, PHY_ISFR , ®value); #endif /* LWIP_ARP || LWIP_ETHERNET */ } /** * This function should do the actual transmission of the packet. The packet is * contained in the pbuf that is passed to the function. This pbuf * might be chained. * * @param netif the lwip network interface structure for this ethernetif * @param p the MAC packet to send (e.g. IP packet including MAC addresses and type) * @return ERR_OK if the packet could be sent * an err_t value if the packet couldn't be sent * * @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to * strange results. You might consider waiting for space in the DMA queue * to become availale since the stack doesn't retry to send a packet * dropped because of memory failure (except for the TCP timers). */ static err_t low_level_output(struct netif *netif, struct pbuf *p) { err_t errval; struct pbuf *q; uint8_t *buffer = (uint8_t *)(heth.TxDesc->Buffer1Addr); __IO ETH_DMADescTypeDef *DmaTxDesc; uint32_t framelength = 0; uint32_t bufferoffset = 0; uint32_t byteslefttocopy = 0; uint32_t payloadoffset = 0; DmaTxDesc = heth.TxDesc; bufferoffset = 0; /* copy frame from pbufs to driver buffers */ for(q = p; q != NULL; q = q->next) { /* Is this buffer available? If not, goto error */ if((DmaTxDesc->Status & ETH_DMATXDESC_OWN) != (uint32_t)RESET) { errval = ERR_USE; goto error; } /* Get bytes in current lwIP buffer */ byteslefttocopy = q->len; payloadoffset = 0; /* Check if the length of data to copy is bigger than Tx buffer size*/ while( (byteslefttocopy + bufferoffset) > ETH_TX_BUF_SIZE ) { /* Copy data to Tx buffer*/ memcpy( (uint8_t*)((uint8_t*)buffer + bufferoffset), (uint8_t*)((uint8_t*)q->payload + payloadoffset), (ETH_TX_BUF_SIZE - bufferoffset) ); /* Point to next descriptor */ DmaTxDesc = (ETH_DMADescTypeDef *)(DmaTxDesc->Buffer2NextDescAddr); /* Check if the buffer is available */ if((DmaTxDesc->Status & ETH_DMATXDESC_OWN) != (uint32_t)RESET) { errval = ERR_USE; goto error; } buffer = (uint8_t *)(DmaTxDesc->Buffer1Addr); byteslefttocopy = byteslefttocopy - (ETH_TX_BUF_SIZE - bufferoffset); payloadoffset = payloadoffset + (ETH_TX_BUF_SIZE - bufferoffset); framelength = framelength + (ETH_TX_BUF_SIZE - bufferoffset); bufferoffset = 0; } /* Copy the remaining bytes */ memcpy( (uint8_t*)((uint8_t*)buffer + bufferoffset), (uint8_t*)((uint8_t*)q->payload + payloadoffset), byteslefttocopy ); bufferoffset = bufferoffset + byteslefttocopy; framelength = framelength + byteslefttocopy; } /* Prepare transmit descriptors to give to DMA */ HAL_ETH_TransmitFrame(&heth, framelength); errval = ERR_OK; error: /* When Transmit Underflow flag is set, clear it and issue a Transmit Poll Demand to resume transmission */ if ((heth.Instance->DMASR & ETH_DMASR_TUS) != (uint32_t)RESET) { /* Clear TUS ETHERNET DMA flag */ heth.Instance->DMASR = ETH_DMASR_TUS; /* Resume DMA transmission*/ heth.Instance->DMATPDR = 0; } return errval; } /** * Should allocate a pbuf and transfer the bytes of the incoming * packet from the interface into the pbuf. * * @param netif the lwip network interface structure for this ethernetif * @return a pbuf filled with the received packet (including MAC header) * NULL on memory error */ static struct pbuf * low_level_input(struct netif *netif) { struct pbuf *p = NULL; struct pbuf *q = NULL; uint16_t len = 0; uint8_t *buffer; __IO ETH_DMADescTypeDef *dmarxdesc; uint32_t bufferoffset = 0; uint32_t payloadoffset = 0; uint32_t byteslefttocopy = 0; uint32_t i=0; /* get received frame */ if (HAL_ETH_GetReceivedFrame(&heth) != HAL_OK) return NULL; /* Obtain the size of the packet and put it into the "len" variable. */ len = heth.RxFrameInfos.length; buffer = (uint8_t *)heth.RxFrameInfos.buffer; if (len > 0) { /* We allocate a pbuf chain of pbufs from the Lwip buffer pool */ p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL); } if (p != NULL) { dmarxdesc = heth.RxFrameInfos.FSRxDesc; bufferoffset = 0; for(q = p; q != NULL; q = q->next) { byteslefttocopy = q->len; payloadoffset = 0; /* Check if the length of bytes to copy in current pbuf is bigger than Rx buffer size*/ while( (byteslefttocopy + bufferoffset) > ETH_RX_BUF_SIZE ) { /* Copy data to pbuf */ memcpy( (uint8_t*)((uint8_t*)q->payload + payloadoffset), (uint8_t*)((uint8_t*)buffer + bufferoffset), (ETH_RX_BUF_SIZE - bufferoffset)); /* Point to next descriptor */ dmarxdesc = (ETH_DMADescTypeDef *)(dmarxdesc->Buffer2NextDescAddr); buffer = (uint8_t *)(dmarxdesc->Buffer1Addr); byteslefttocopy = byteslefttocopy - (ETH_RX_BUF_SIZE - bufferoffset); payloadoffset = payloadoffset + (ETH_RX_BUF_SIZE - bufferoffset); bufferoffset = 0; } /* Copy remaining data in pbuf */ memcpy( (uint8_t*)((uint8_t*)q->payload + payloadoffset), (uint8_t*)((uint8_t*)buffer + bufferoffset), byteslefttocopy); bufferoffset = bufferoffset + byteslefttocopy; } } /* Release descriptors to DMA */ /* Point to first descriptor */ dmarxdesc = heth.RxFrameInfos.FSRxDesc; /* Set Own bit in Rx descriptors: gives the buffers back to DMA */ for (i=0; i< heth.RxFrameInfos.SegCount; i++) { dmarxdesc->Status |= ETH_DMARXDESC_OWN; dmarxdesc = (ETH_DMADescTypeDef *)(dmarxdesc->Buffer2NextDescAddr); } /* Clear Segment_Count */ heth.RxFrameInfos.SegCount =0; /* When Rx Buffer unavailable flag is set: clear it and resume reception */ if ((heth.Instance->DMASR & ETH_DMASR_RBUS) != (uint32_t)RESET) { /* Clear RBUS ETHERNET DMA flag */ heth.Instance->DMASR = ETH_DMASR_RBUS; /* Resume DMA reception */ heth.Instance->DMARPDR = 0; } return p; } void check_link_status(struct netif* netif) { uint32_t regvalue = 0; if (HAL_ETH_ReadPHYRegister(&heth, PHY_BSR, ®value) == HAL_OK) { if((regvalue & PHY_LINKED_STATUS)== (uint16_t)RESET) { // Link status = disconnected if (netif_is_link_up(netif)) { netif_set_down(netif); getLwipStatus()->link_status = LINK_DOWN; netif_set_link_down(netif); } } else { // Link status = connected if (!netif_is_link_up(netif)) { getLwipStatus()->link_status = LINK_UP; NVIC_SystemReset(); } getLwipStatus()->link_status = LINK_UP; } } } /** * This function should be called when a packet is ready to be read * from the interface. It uses the function low_level_input() that * should handle the actual reception of bytes from the network * interface. Then the type of the received packet is determined and * the appropriate input function is called. * * @param netif the lwip network interface structure for this ethernetif */ void ethernetif_input(struct netif *netif) { err_t err; struct pbuf *p; /* move received packet into a new pbuf */ p = low_level_input(netif); check_link_status(netif); /* no packet could be read, silently ignore this */ if (p == NULL) return; /* entry point to the LwIP stack */ err = netif->input(p, netif); if (err != ERR_OK) { LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n")); pbuf_free(p); p = NULL; } } #if !LWIP_ARP /** * This function has to be completed by user in case of ARP OFF. * * @param netif the lwip network interface structure for this ethernetif * @return ERR_OK if ... */ static err_t low_level_output_arp_off(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr) { err_t errval; errval = ERR_OK; return errval; } #endif /* LWIP_ARP */ /** * Should be called at the beginning of the program to set up the * network interface. It calls the function low_level_init() to do the * actual setup of the hardware. * * This function should be passed as a parameter to netif_add(). * * @param netif the lwip network interface structure for this ethernetif * @return ERR_OK if the loopif is initialized * ERR_MEM if private data couldn't be allocated * any other err_t on error */ err_t ethernetif_init(struct netif *netif) { LWIP_ASSERT("netif != NULL", (netif != NULL)); #if LWIP_NETIF_HOSTNAME /* Initialize interface hostname */ netif->hostname = "lwip"; #endif /* LWIP_NETIF_HOSTNAME */ netif->name[0] = IFNAME0; netif->name[1] = IFNAME1; /* We directly use etharp_output() here to save a function call. * You can instead declare your own function an call etharp_output() * from it if you have to do some checks before sending (e.g. if link * is available...) */ #if LWIP_IPV4 #if LWIP_ARP || LWIP_ETHERNET #if LWIP_ARP netif->output = etharp_output; #else /* The user should write ist own code in low_level_output_arp_off function */ netif->output = low_level_output_arp_off; #endif /* LWIP_ARP */ #endif /* LWIP_ARP || LWIP_ETHERNET */ #endif /* LWIP_IPV4 */ #if LWIP_IPV6 netif->output_ip6 = ethip6_output; #endif /* LWIP_IPV6 */ netif->linkoutput = low_level_output; /* initialize the hardware */ low_level_init(netif); return ERR_OK; } /** * @brief Returns the current time in milliseconds * when LWIP_TIMERS == 1 and NO_SYS == 1 * @param None * @retval Time */ u32_t sys_jiffies(void) { return getSysTick(); } /** * @brief Returns the current time in milliseconds * when LWIP_TIMERS == 1 and NO_SYS == 1 * @param None * @retval Time */ u32_t sys_now(void) { return getSysTick(); } #if LWIP_NETIF_LINK_CALLBACK /** * @brief Link callback function, this function is called on change of link status * to update low level driver configuration. * @param netif: The network interface * @retval None */ void ethernetif_update_config(struct netif *netif) { __IO uint32_t tickstart = 0; uint32_t regvalue = 0; if(netif_is_link_up(netif)) { /* Restart the auto-negotiation */ if(heth.Init.AutoNegotiation != ETH_AUTONEGOTIATION_DISABLE) { /* Enable Auto-Negotiation */ HAL_ETH_WritePHYRegister(&heth, PHY_BCR, PHY_AUTONEGOTIATION); /* Get tick */ tickstart = getSysTick(); /* Wait until the auto-negotiation will be completed */ do { HAL_ETH_ReadPHYRegister(&heth, PHY_BSR, ®value); /* Check for the Timeout ( 1s ) */ if((getSysTick() - tickstart ) > 1000) { /* In case of timeout */ goto error; } } while (((regvalue & PHY_AUTONEGO_COMPLETE) != PHY_AUTONEGO_COMPLETE)); /* Read the result of the auto-negotiation */ HAL_ETH_ReadPHYRegister(&heth, PHY_SR, ®value); /* Configure the MAC with the Duplex Mode fixed by the auto-negotiation process */ if((regvalue & PHY_DUPLEX_STATUS) != (uint32_t)RESET) { /* Set Ethernet duplex mode to Full-duplex following the auto-negotiation */ heth.Init.DuplexMode = ETH_MODE_FULLDUPLEX; } else { /* Set Ethernet duplex mode to Half-duplex following the auto-negotiation */ heth.Init.DuplexMode = ETH_MODE_HALFDUPLEX; } /* Configure the MAC with the speed fixed by the auto-negotiation process */ if(regvalue & PHY_SPEED_STATUS) { /* Set Ethernet speed to 10M following the auto-negotiation */ heth.Init.Speed = ETH_SPEED_10M; } else { /* Set Ethernet speed to 100M following the auto-negotiation */ heth.Init.Speed = ETH_SPEED_100M; } } else /* AutoNegotiation Disable */ { error : /* Check parameters */ assert_param(IS_ETH_SPEED(heth.Init.Speed)); assert_param(IS_ETH_DUPLEX_MODE(heth.Init.DuplexMode)); /* Set MAC Speed and Duplex Mode to PHY */ HAL_ETH_WritePHYRegister(&heth, PHY_BCR, ((uint16_t)(heth.Init.DuplexMode >> 3) | (uint16_t)(heth.Init.Speed >> 1))); } /* ETHERNET MAC Re-Configuration */ HAL_ETH_ConfigMAC(&heth, (ETH_MACInitTypeDef *) NULL); /* Restart MAC interface */ HAL_ETH_Start(&heth); } else { /* Stop MAC interface */ HAL_ETH_Stop(&heth); } ethernetif_notify_conn_changed(netif); } /** * @brief This function notify user about link status changement. * @param netif: the network interface * @retval None */ __weak void ethernetif_notify_conn_changed(struct netif *netif) { /* NOTE : This is function could be implemented in user file when the callback is needed, */ } #endif /* LWIP_NETIF_LINK_CALLBACK */