diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/net/eth/lwip-eth/arch/TARGET_Freescale/k64f_emac.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/net/eth/lwip-eth/arch/TARGET_Freescale/k64f_emac.c | 885 |
1 files changed, 885 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/net/eth/lwip-eth/arch/TARGET_Freescale/k64f_emac.c b/tmk_core/tool/mbed/mbed-sdk/libraries/net/eth/lwip-eth/arch/TARGET_Freescale/k64f_emac.c new file mode 100644 index 0000000000..482cd79595 --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/net/eth/lwip-eth/arch/TARGET_Freescale/k64f_emac.c @@ -0,0 +1,885 @@ +#include "lwip/opt.h" +#include "lwip/sys.h" +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/pbuf.h" +#include "lwip/stats.h" +#include "lwip/snmp.h" +#include "lwip/tcpip.h" +#include "netif/etharp.h" +#include "netif/ppp_oe.h" + +#include "eth_arch.h" +#include "sys_arch.h" + +#include "fsl_enet_driver.h" +#include "fsl_enet_hal.h" +#include "fsl_device_registers.h" +#include "fsl_phy_driver.h" +#include "fsl_interrupt_manager.h" +#include "k64f_emac_config.h" +#include <ctype.h> +#include <stdio.h> +#include <string.h> +#include <stdlib.h> + +#include "mbed_interface.h" + +extern IRQn_Type enet_irq_ids[HW_ENET_INSTANCE_COUNT][FSL_FEATURE_ENET_INTERRUPT_COUNT]; +extern uint8_t enetIntMap[kEnetIntNum]; +extern void *enetIfHandle; + +/******************************************************************************** + * Internal data + ********************************************************************************/ + +extern void k64f_init_eth_hardware(void); + +/* K64F EMAC driver data structure */ +struct k64f_enetdata { + struct netif *netif; /**< Reference back to LWIP parent netif */ + sys_sem_t RxReadySem; /**< RX packet ready semaphore */ + sys_sem_t TxCleanSem; /**< TX cleanup thread wakeup semaphore */ + sys_mutex_t TXLockMutex; /**< TX critical section mutex */ + sys_sem_t xTXDCountSem; /**< TX free buffer counting semaphore */ + volatile u32_t rx_free_descs; /**< Count of free RX descriptors */ + struct pbuf *rxb[ENET_RX_RING_LEN]; /**< RX pbuf pointer list, zero-copy mode */ + uint8_t *rx_desc_start_addr; /**< RX descriptor start address */ + uint8_t *tx_desc_start_addr; /**< TX descriptor start address */ + uint8_t tx_consume_index, tx_produce_index; /**< TX buffers ring */ + uint8_t rx_fill_index; /**< RX ring fill index */ + struct pbuf *txb[ENET_TX_RING_LEN]; /**< TX pbuf pointer list, zero-copy mode */ + void *txb_aligned[ENET_TX_RING_LEN]; /**< TX aligned buffers (if needed) */ +}; + +static struct k64f_enetdata k64f_enetdata; + +static enet_dev_if_t enetDevIf[HW_ENET_INSTANCE_COUNT]; +static enet_mac_config_t g_enetMacCfg[HW_ENET_INSTANCE_COUNT] = +{ + { + ENET_ETH_MAX_FLEN , /*!< enet receive buffer size*/ + ENET_RX_LARGE_BUFFER_NUM, /*!< enet large receive buffer number*/ + ENET_RX_RING_LEN, /*!< enet receive bd number*/ + ENET_TX_RING_LEN, /*!< enet transmit bd number*/ + {0}, /*!< enet mac address*/ + kEnetCfgRmii, /*!< enet rmii interface*/ + kEnetCfgSpeed100M, /*!< enet rmii 100M*/ + kEnetCfgFullDuplex, /*!< enet rmii Full- duplex*/ + /*!< enet mac control flag recommended to use enet_mac_control_flag_t + we send frame with crc so receive crc forward for data length check test*/ + kEnetRxCrcFwdEnable | kEnetRxFlowControlEnable, + true, /*!< enet txaccelerator enabled*/ + true, /*!< enet rxaccelerator enabled*/ + false, /*!< enet store and forward*/ + {false, false, true, false, true}, /*!< enet rxaccelerator config*/ + {false, false, true}, /*!< enet txaccelerator config*/ + true, /*!< vlan frame support*/ + true, /*!< phy auto discover*/ + ENET_MII_CLOCK, /*!< enet MDC clock*/ + }, +}; + +static enet_phy_config_t g_enetPhyCfg[HW_ENET_INSTANCE_COUNT] = +{ + {0, false} +}; + +/** \brief Driver transmit and receive thread priorities + * + * Thread priorities for receive thread and TX cleanup thread. Alter + * to prioritize receive or transmit bandwidth. In a heavily loaded + * system or with LEIP_DEBUG enabled, the priorities might be better + * the same. */ +#define RX_PRIORITY (osPriorityNormal) +#define TX_PRIORITY (osPriorityNormal) +#define PHY_PRIORITY (osPriorityNormal) + +/** \brief Debug output formatter lock define + * + * When using FreeRTOS and with LWIP_DEBUG enabled, enabling this + * define will allow RX debug messages to not interleave with the + * TX messages (so they are actually readable). Not enabling this + * define when the system is under load will cause the output to + * be unreadable. There is a small tradeoff in performance for this + * so use it only for debug. */ +//#define LOCK_RX_THREAD + +/** \brief Signal used for ethernet ISR to signal packet_rx() thread. + */ +#define RX_SIGNAL 1 + +// K64F-specific macros +#define RX_PBUF_AUTO_INDEX (-1) + +/******************************************************************************** + * Buffer management + ********************************************************************************/ + +/** \brief Queues a pbuf into the RX descriptor list + * + * \param[in] k64f_enet Pointer to the drvier data structure + * \param[in] p Pointer to pbuf to queue + * \param[in] bidx Index to queue into + */ +static void k64f_rxqueue_pbuf(struct k64f_enetdata *k64f_enet, struct pbuf *p, int bidx) +{ + enet_bd_struct_t *start = (enet_bd_struct_t *)k64f_enet->rx_desc_start_addr; + int idx; + + /* Get next free descriptor index */ + if (bidx == RX_PBUF_AUTO_INDEX) + idx = k64f_enet->rx_fill_index; + else + idx = bidx; + + /* Setup descriptor and clear statuses */ + enet_hal_init_rxbds(start + idx, (uint8_t*)p->payload, idx == ENET_RX_RING_LEN - 1); + + /* Save pbuf pointer for push to network layer later */ + k64f_enet->rxb[idx] = p; + + /* Wrap at end of descriptor list */ + idx = (idx + 1) % ENET_RX_RING_LEN; + + /* Queue descriptor(s) */ + k64f_enet->rx_free_descs -= 1; + + if (bidx == RX_PBUF_AUTO_INDEX) + k64f_enet->rx_fill_index = idx; + + enet_hal_active_rxbd(BOARD_DEBUG_ENET_INSTANCE_ADDR); + + LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE, + ("k64f_rxqueue_pbuf: pbuf packet queued: %p (free desc=%d)\n", p, + k64f_enet->rx_free_descs)); +} + +/** \brief Attempt to allocate and requeue a new pbuf for RX + * + * \param[in] netif Pointer to the netif structure + * \returns number of queued packets + */ +s32_t k64f_rx_queue(struct netif *netif, int idx) +{ + struct k64f_enetdata *k64f_enet = netif->state; + enet_dev_if_t *enetIfPtr = (enet_dev_if_t *)&enetDevIf[BOARD_DEBUG_ENET_INSTANCE]; + struct pbuf *p; + int queued = 0; + + /* Attempt to requeue as many packets as possible */ + while (k64f_enet->rx_free_descs > 0) { + /* Allocate a pbuf from the pool. We need to allocate at the + maximum size as we don't know the size of the yet to be + received packet. */ + p = pbuf_alloc(PBUF_RAW, enetIfPtr->macCfgPtr->rxBufferSize + RX_BUF_ALIGNMENT, PBUF_RAM); + if (p == NULL) { + LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE, + ("k64_rx_queue: could not allocate RX pbuf (free desc=%d)\n", + k64f_enet->rx_free_descs)); + return queued; + } + /* K64F note: the next line ensures that the RX buffer is properly aligned for the K64F + RX descriptors (16 bytes alignment). However, by doing so, we're effectively changing + a data structure which is internal to lwIP. This might not prove to be a good idea + in the long run, but a better fix would probably involve modifying lwIP itself */ + p->payload = (void*)ENET_ALIGN((uint32_t)p->payload, RX_BUF_ALIGNMENT); + + /* pbufs allocated from the RAM pool should be non-chained. */ + LWIP_ASSERT("k64f_rx_queue: pbuf is not contiguous (chained)", pbuf_clen(p) <= 1); + + /* Queue packet */ + k64f_rxqueue_pbuf(k64f_enet, p, idx); + queued++; + } + + return queued; +} + +/** \brief Sets up the RX descriptor ring buffers. + * + * This function sets up the descriptor list used for receive packets. + * + * \param[in] netif Pointer to driver data structure + * \returns ERR_MEM if out of memory, ERR_OK otherwise + */ +static err_t k64f_rx_setup(struct netif *netif, enet_rxbd_config_t *rxbdCfg) { + struct k64f_enetdata *k64f_enet = netif->state; + enet_dev_if_t *enetIfPtr = (enet_dev_if_t *)&enetDevIf[BOARD_DEBUG_ENET_INSTANCE]; + uint8_t *rxBdPtr; + uint32_t rxBufferSizeAligned; + + // Allocate RX descriptors + rxBdPtr = (uint8_t *)calloc(1, enet_hal_get_bd_size() * enetIfPtr->macCfgPtr->rxBdNumber + ENET_BD_ALIGNMENT); + if(!rxBdPtr) + return ERR_MEM; + k64f_enet->rx_desc_start_addr = (uint8_t *)ENET_ALIGN((uint32_t)rxBdPtr, ENET_BD_ALIGNMENT); + k64f_enet->rx_free_descs = enetIfPtr->macCfgPtr->rxBdNumber; + k64f_enet->rx_fill_index = 0; + + rxBufferSizeAligned = ENET_ALIGN(enetIfPtr->macCfgPtr->rxBufferSize, ENET_RX_BUFFER_ALIGNMENT); + enetIfPtr->macContextPtr->rxBufferSizeAligned = rxBufferSizeAligned; + rxbdCfg->rxBdPtrAlign = k64f_enet->rx_desc_start_addr; + rxbdCfg->rxBdNum = enetIfPtr->macCfgPtr->rxBdNumber; + rxbdCfg->rxBufferNum = enetIfPtr->macCfgPtr->rxBdNumber; + + k64f_rx_queue(netif, RX_PBUF_AUTO_INDEX); + return ERR_OK; +} + +/** \brief Sets up the TX descriptor ring buffers. + * + * This function sets up the descriptor list used for transmit packets. + * + * \param[in] netif Pointer to driver data structure + * \returns ERR_MEM if out of memory, ERR_OK otherwise + */ +static err_t k64f_tx_setup(struct netif *netif, enet_txbd_config_t *txbdCfg) { + struct k64f_enetdata *k64f_enet = netif->state; + enet_dev_if_t *enetIfPtr = (enet_dev_if_t *)&enetDevIf[BOARD_DEBUG_ENET_INSTANCE]; + uint8_t *txBdPtr; + + // Allocate TX descriptors + txBdPtr = (uint8_t *)calloc(1, enet_hal_get_bd_size() * enetIfPtr->macCfgPtr->txBdNumber + ENET_BD_ALIGNMENT); + if(!txBdPtr) + return ERR_MEM; + + k64f_enet->tx_desc_start_addr = (uint8_t *)ENET_ALIGN((uint32_t)txBdPtr, ENET_BD_ALIGNMENT); + k64f_enet->tx_consume_index = k64f_enet->tx_produce_index = 0; + + txbdCfg->txBdPtrAlign = k64f_enet->tx_desc_start_addr; + txbdCfg->txBufferNum = enetIfPtr->macCfgPtr->txBdNumber; + txbdCfg->txBufferSizeAlign = ENET_ALIGN(enetIfPtr->maxFrameSize, ENET_TX_BUFFER_ALIGNMENT); + + // Make the TX descriptor ring circular + enet_hal_init_txbds(k64f_enet->tx_desc_start_addr + enet_hal_get_bd_size() * (ENET_TX_RING_LEN - 1), 1); + + return ERR_OK; +} + +/** \brief Free TX buffers that are complete + * + * \param[in] k64f_enet Pointer to driver data structure + */ +static void k64f_tx_reclaim(struct k64f_enetdata *k64f_enet) +{ + uint8_t i; + volatile enet_bd_struct_t * bdPtr = (enet_bd_struct_t *)k64f_enet->tx_desc_start_addr; + + /* Get exclusive access */ + sys_mutex_lock(&k64f_enet->TXLockMutex); + + // Traverse all descriptors, looking for the ones modified by the uDMA + i = k64f_enet->tx_consume_index; + while(i != k64f_enet->tx_produce_index && !(bdPtr[i].control & kEnetTxBdReady)) { + if (k64f_enet->txb_aligned[i]) { + free(k64f_enet->txb_aligned[i]); + k64f_enet->txb_aligned[i] = NULL; + } else if (k64f_enet->txb[i]) { + pbuf_free(k64f_enet->txb[i]); + k64f_enet->txb[i] = NULL; + } + osSemaphoreRelease(k64f_enet->xTXDCountSem.id); + bdPtr[i].controlExtend2 &= ~TX_DESC_UPDATED_MASK; + i = (i + 1) % ENET_TX_RING_LEN; + } + k64f_enet->tx_consume_index = i; + + /* Restore access */ + sys_mutex_unlock(&k64f_enet->TXLockMutex); +} + +/** \brief Low level init of the MAC and PHY. + * + * \param[in] netif Pointer to LWIP netif structure + */ +static err_t low_level_init(struct netif *netif) +{ + enet_dev_if_t * enetIfPtr; + uint32_t device = BOARD_DEBUG_ENET_INSTANCE_ADDR; + enet_rxbd_config_t rxbdCfg; + enet_txbd_config_t txbdCfg; + enet_phy_speed_t phy_speed; + enet_phy_duplex_t phy_duplex; + + k64f_init_eth_hardware(); + + /* Initialize device*/ + enetIfPtr = (enet_dev_if_t *)&enetDevIf[BOARD_DEBUG_ENET_INSTANCE]; + enetIfPtr->deviceNumber = device; + enetIfPtr->macCfgPtr = &g_enetMacCfg[BOARD_DEBUG_ENET_INSTANCE]; + enetIfPtr->phyCfgPtr = &g_enetPhyCfg[BOARD_DEBUG_ENET_INSTANCE]; + enetIfPtr->macApiPtr = &g_enetMacApi; + enetIfPtr->phyApiPtr = (void *)&g_enetPhyApi; + memcpy(enetIfPtr->macCfgPtr->macAddr, (char*)netif->hwaddr, kEnetMacAddrLen); + + /* Allocate buffer for ENET mac context*/ + enetIfPtr->macContextPtr = (enet_mac_context_t *)calloc(1, sizeof(enet_mac_context_t)); + if (!enetIfPtr->macContextPtr) { + return ERR_BUF; + } + + /* Initialize enet buffers*/ + if(k64f_rx_setup(netif, &rxbdCfg) != ERR_OK) { + return ERR_BUF; + } + /* Initialize enet buffers*/ + if(k64f_tx_setup(netif, &txbdCfg) != ERR_OK) { + return ERR_BUF; + } + /* Initialize enet module*/ + if (enet_mac_init(enetIfPtr, &rxbdCfg, &txbdCfg) == kStatus_ENET_Success) + { + /* Initialize PHY*/ + if (enetIfPtr->macCfgPtr->isPhyAutoDiscover) { + if (((enet_phy_api_t *)(enetIfPtr->phyApiPtr))->phy_auto_discover(enetIfPtr) != kStatus_PHY_Success) + return ERR_IF; + } + if (((enet_phy_api_t *)(enetIfPtr->phyApiPtr))->phy_init(enetIfPtr) != kStatus_PHY_Success) + return ERR_IF; + + enetIfPtr->isInitialized = true; + } + else + { + // TODOETH: cleanup memory + return ERR_IF; + } + + /* Get link information from PHY */ + phy_get_link_speed(enetIfPtr, &phy_speed); + phy_get_link_duplex(enetIfPtr, &phy_duplex); + BW_ENET_RCR_RMII_10T(enetIfPtr->deviceNumber, phy_speed == kEnetSpeed10M ? kEnetCfgSpeed10M : kEnetCfgSpeed100M); + BW_ENET_TCR_FDEN(enetIfPtr->deviceNumber, phy_duplex == kEnetFullDuplex ? kEnetCfgFullDuplex : kEnetCfgHalfDuplex); + + /* Enable Ethernet module*/ + enet_hal_config_ethernet(BOARD_DEBUG_ENET_INSTANCE_ADDR, true, true); + + /* Active Receive buffer descriptor must be done after module enable*/ + enet_hal_active_rxbd(enetIfPtr->deviceNumber); + + return ERR_OK; +} + +/******************************************************************************** + * LWIP port + ********************************************************************************/ + +/** \brief Ethernet receive interrupt handler + * + * This function handles the receive interrupt of K64F. + */ +void enet_mac_rx_isr(void *enetIfPtr) +{ + /* Clear interrupt */ + enet_hal_clear_interrupt(((enet_dev_if_t *)enetIfPtr)->deviceNumber, kEnetRxFrameInterrupt); + sys_sem_signal(&k64f_enetdata.RxReadySem); +} + +void enet_mac_tx_isr(void *enetIfPtr) +{ + /*Clear interrupt*/ + enet_hal_clear_interrupt(((enet_dev_if_t *)enetIfPtr)->deviceNumber, kEnetTxFrameInterrupt); + sys_sem_signal(&k64f_enetdata.TxCleanSem); +} + +/** + * This function is the ethernet packet send function. It calls + * etharp_output after checking link status. + * + * \param[in] netif the lwip network interface structure for this enetif + * \param[in] q Pointer to pbug to send + * \param[in] ipaddr IP address + * \return ERR_OK or error code + */ +err_t k64f_etharp_output(struct netif *netif, struct pbuf *q, ip_addr_t *ipaddr) +{ + /* Only send packet is link is up */ + if (netif->flags & NETIF_FLAG_LINK_UP) + return etharp_output(netif, q, ipaddr); + + return ERR_CONN; +} + +/** \brief Allocates a pbuf and returns the data from the incoming packet. + * + * \param[in] netif the lwip network interface structure + * \param[in] idx index of packet to be read + * \return a pbuf filled with the received packet (including MAC header) + */ +static struct pbuf *k64f_low_level_input(struct netif *netif, int idx) +{ + struct k64f_enetdata *k64f_enet = netif->state; + enet_bd_struct_t * bdPtr = (enet_bd_struct_t*)k64f_enet->rx_desc_start_addr; + struct pbuf *p = NULL; + u32_t length = 0, orig_length; + const u16_t err_mask = kEnetRxBdTrunc | kEnetRxBdCrc | kEnetRxBdNoOctet | kEnetRxBdLengthViolation; + +#ifdef LOCK_RX_THREAD + /* Get exclusive access */ + sys_mutex_lock(&k64f_enet->TXLockMutex); +#endif + + /* Determine if a frame has been received */ + if ((bdPtr[idx].control & err_mask) != 0) { +#if LINK_STATS + if ((bdPtr[idx].control & kEnetRxBdLengthViolation) != 0) + LINK_STATS_INC(link.lenerr); + else + LINK_STATS_INC(link.chkerr); +#endif + LINK_STATS_INC(link.drop); + + /* Re-queue the same buffer */ + k64f_enet->rx_free_descs++; + p = k64f_enet->rxb[idx]; + k64f_enet->rxb[idx] = NULL; + k64f_rxqueue_pbuf(k64f_enet, p, idx); + p = NULL; + } else { + /* A packet is waiting, get length */ + length = enet_hal_get_bd_length(bdPtr + idx); + + /* Zero-copy */ + p = k64f_enet->rxb[idx]; + orig_length = p->len; + p->len = (u16_t) length; + + /* Free pbuf from descriptor */ + k64f_enet->rxb[idx] = NULL; + k64f_enet->rx_free_descs++; + + /* Attempt to queue new buffer */ + if (k64f_rx_queue(netif, idx) == 0) { + /* Drop frame (out of memory) */ + LINK_STATS_INC(link.drop); + + /* Re-queue the same buffer */ + p->len = orig_length; + k64f_rxqueue_pbuf(k64f_enet, p, idx); + + LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE, + ("k64f_low_level_input: Packet index %d dropped for OOM\n", + idx)); +#ifdef LOCK_RX_THREAD + sys_mutex_unlock(&k64f_enet->TXLockMutex); +#endif + + return NULL; + } + + LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE, + ("k64f_low_level_input: Packet received: %p, size %d (index=%d)\n", + p, length, idx)); + + /* Save size */ + p->tot_len = (u16_t) length; + LINK_STATS_INC(link.recv); + } + +#ifdef LOCK_RX_THREAD + sys_mutex_unlock(&k64f_enet->TXLockMutex); +#endif + + return p; +} + +/** \brief Attempt to read a packet from the EMAC interface. + * + * \param[in] netif the lwip network interface structure + * \param[in] idx index of packet to be read + */ +void k64f_enetif_input(struct netif *netif, int idx) +{ + struct eth_hdr *ethhdr; + struct pbuf *p; + + /* move received packet into a new pbuf */ + p = k64f_low_level_input(netif, idx); + if (p == NULL) + return; + + /* points to packet payload, which starts with an Ethernet header */ + ethhdr = (struct eth_hdr*)p->payload; + + switch (htons(ethhdr->type)) { + case ETHTYPE_IP: + case ETHTYPE_ARP: +#if PPPOE_SUPPORT + case ETHTYPE_PPPOEDISC: + case ETHTYPE_PPPOE: +#endif /* PPPOE_SUPPORT */ + /* full packet send to tcpip_thread to process */ + if (netif->input(p, netif) != ERR_OK) { + LWIP_DEBUGF(NETIF_DEBUG, ("k64f_enetif_input: IP input error\n")); + /* Free buffer */ + pbuf_free(p); + } + break; + + default: + /* Return buffer */ + pbuf_free(p); + break; + } +} + +/** \brief Packet reception task + * + * This task is called when a packet is received. It will + * pass the packet to the LWIP core. + * + * \param[in] pvParameters pointer to the interface data + */ +static void packet_rx(void* pvParameters) { + struct k64f_enetdata *k64f_enet = pvParameters; + volatile enet_bd_struct_t * bdPtr = (enet_bd_struct_t*)k64f_enet->rx_desc_start_addr; + int idx = 0; + + while (1) { + /* Wait for receive task to wakeup */ + sys_arch_sem_wait(&k64f_enet->RxReadySem, 0); + + if ((bdPtr[idx].control & kEnetRxBdEmpty) == 0) { + k64f_enetif_input(k64f_enet->netif, idx); + idx = (idx + 1) % ENET_RX_RING_LEN; + } + } +} + +/** \brief Transmit cleanup task + * + * This task is called when a transmit interrupt occurs and + * reclaims the pbuf and descriptor used for the packet once + * the packet has been transferred. + * + * \param[in] pvParameters pointer to the interface data + */ +static void packet_tx(void* pvParameters) { + struct k64f_enetdata *k64f_enet = pvParameters; + + while (1) { + /* Wait for transmit cleanup task to wakeup */ + sys_arch_sem_wait(&k64f_enet->TxCleanSem, 0); + // TODOETH: handle TX underrun? + k64f_tx_reclaim(k64f_enet); + } +} + + /** \brief Polls if an available TX descriptor is ready. Can be used to + * determine if the low level transmit function will block. + * + * \param[in] netif the lwip network interface structure + * \return 0 if no descriptors are read, or >0 + */ +s32_t k64f_tx_ready(struct netif *netif) +{ + struct k64f_enetdata *k64f_enet = netif->state; + s32_t fb; + u32_t idx, cidx; + + cidx = k64f_enet->tx_consume_index; + idx = k64f_enet->tx_produce_index; + + /* Determine number of free buffers */ + if (idx == cidx) + fb = ENET_TX_RING_LEN; + else if (cidx > idx) + fb = (ENET_TX_RING_LEN - 1) - + ((idx + ENET_TX_RING_LEN) - cidx); + else + fb = (ENET_TX_RING_LEN - 1) - (cidx - idx); + + return fb; +} + +/*FUNCTION**************************************************************** + * + * Function Name: enet_hal_update_txbds + * Description: Update ENET transmit buffer descriptors. + *END*********************************************************************/ +void k64f_update_txbds(struct k64f_enetdata *k64f_enet, int idx, uint8_t *buffer, uint16_t length, bool isLast) +{ + volatile enet_bd_struct_t * bdPtr = (enet_bd_struct_t *)(k64f_enet->tx_desc_start_addr + idx * enet_hal_get_bd_size()); + + bdPtr->length = HTONS(length); /* Set data length*/ + bdPtr->buffer = (uint8_t *)HTONL((uint32_t)buffer); /* Set data buffer*/ + if (isLast) + bdPtr->control |= kEnetTxBdLast; + else + bdPtr->control &= ~kEnetTxBdLast; + bdPtr->controlExtend1 |= kEnetTxBdTxInterrupt; + bdPtr->controlExtend2 &= ~TX_DESC_UPDATED_MASK; // descriptor not updated by DMA + bdPtr->control |= kEnetTxBdTransmitCrc | kEnetTxBdReady; +} + +/** \brief Low level output of a packet. Never call this from an + * interrupt context, as it may block until TX descriptors + * become available. + * + * \param[in] netif the lwip network interface structure for this netif + * \param[in] p the MAC packet to send (e.g. IP packet including MAC addresses and type) + * \return ERR_OK if the packet could be sent or an err_t value if the packet couldn't be sent + */ +static err_t k64f_low_level_output(struct netif *netif, struct pbuf *p) +{ + struct k64f_enetdata *k64f_enet = netif->state; + struct pbuf *q; + u32_t idx; + s32_t dn; + uint8_t *psend = NULL, *dst; + + /* Get free TX buffer index */ + idx = k64f_enet->tx_produce_index; + + /* Check the pbuf chain for payloads that are not 8-byte aligned. + If found, a new properly aligned buffer needs to be allocated + and the data copied there */ + for (q = p; q != NULL; q = q->next) + if (((u32_t)q->payload & (TX_BUF_ALIGNMENT - 1)) != 0) + break; + if (q != NULL) { + // Allocate properly aligned buffer + psend = (uint8_t*)malloc(p->tot_len); + if (NULL == psend) + return ERR_MEM; + LWIP_ASSERT("k64f_low_level_output: buffer not properly aligned", ((u32_t)psend & (TX_BUF_ALIGNMENT - 1)) == 0); + for (q = p, dst = psend; q != NULL; q = q->next) { + MEMCPY(dst, q->payload, q->len); + dst += q->len; + } + k64f_enet->txb_aligned[idx] = psend; + dn = 1; + } else { + k64f_enet->txb_aligned[idx] = NULL; + dn = (s32_t) pbuf_clen(p); + pbuf_ref(p); + } + + /* Wait until enough descriptors are available for the transfer. */ + /* THIS WILL BLOCK UNTIL THERE ARE ENOUGH DESCRIPTORS AVAILABLE */ + while (dn > k64f_tx_ready(netif)) + osSemaphoreWait(k64f_enet->xTXDCountSem.id, osWaitForever); + + /* Get exclusive access */ + sys_mutex_lock(&k64f_enet->TXLockMutex); + + /* Setup transfers */ + q = p; + while (dn > 0) { + dn--; + if (psend != NULL) { + k64f_update_txbds(k64f_enet, idx, psend, p->tot_len, 1); + k64f_enet->txb[idx] = NULL; + + LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE, + ("k64f_low_level_output: aligned packet(%p) sent" + " size = %d (index=%d)\n", psend, p->tot_len, idx)); + } else { + LWIP_ASSERT("k64f_low_level_output: buffer not properly aligned", ((u32_t)q->payload & 0x07) == 0); + + /* Only save pointer to free on last descriptor */ + if (dn == 0) { + /* Save size of packet and signal it's ready */ + k64f_update_txbds(k64f_enet, idx, q->payload, q->len, 1); + k64f_enet->txb[idx] = p; + } + else { + /* Save size of packet, descriptor is not last */ + k64f_update_txbds(k64f_enet, idx, q->payload, q->len, 0); + k64f_enet->txb[idx] = NULL; + } + + LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE, + ("k64f_low_level_output: pbuf packet(%p) sent, chain#=%d," + " size = %d (index=%d)\n", q->payload, dn, q->len, idx)); + } + + q = q->next; + + idx = (idx + 1) % ENET_TX_RING_LEN; + } + + k64f_enet->tx_produce_index = idx; + enet_hal_active_txbd(BOARD_DEBUG_ENET_INSTANCE_ADDR); + LINK_STATS_INC(link.xmit); + + /* Restore access */ + sys_mutex_unlock(&k64f_enet->TXLockMutex); + + return ERR_OK; +} + +/******************************************************************************* + * PHY task: monitor link +*******************************************************************************/ + +#define PHY_TASK_PERIOD_MS 200 +#define STATE_UNKNOWN (-1) + +typedef struct { + int connected; + enet_phy_speed_t speed; + enet_phy_duplex_t duplex; +} PHY_STATE; + +int phy_link_status() { + bool connection_status; + enet_dev_if_t * enetIfPtr = (enet_dev_if_t*)&enetDevIf[BOARD_DEBUG_ENET_INSTANCE]; + phy_get_link_status(enetIfPtr, &connection_status); + return (int)connection_status; +} + +static void k64f_phy_task(void *data) { + struct netif *netif = (struct netif*)data; + bool connection_status; + enet_dev_if_t * enetIfPtr = (enet_dev_if_t*)&enetDevIf[BOARD_DEBUG_ENET_INSTANCE]; + PHY_STATE crt_state = {STATE_UNKNOWN, (enet_phy_speed_t)STATE_UNKNOWN, (enet_phy_duplex_t)STATE_UNKNOWN}; + PHY_STATE prev_state; + + prev_state = crt_state; + while (true) { + // Get current status + phy_get_link_status(enetIfPtr, &connection_status); + crt_state.connected = connection_status ? 1 : 0; + phy_get_link_speed(enetIfPtr, &crt_state.speed); + phy_get_link_duplex(enetIfPtr, &crt_state.duplex); + + // Compare with previous state + if (crt_state.connected != prev_state.connected) { + if (crt_state.connected) + tcpip_callback_with_block((tcpip_callback_fn)netif_set_link_up, (void*) netif, 1); + else + tcpip_callback_with_block((tcpip_callback_fn)netif_set_link_down, (void*) netif, 1); + } + + if (crt_state.speed != prev_state.speed) + BW_ENET_RCR_RMII_10T(enetIfPtr->deviceNumber, crt_state.speed == kEnetSpeed10M ? kEnetCfgSpeed10M : kEnetCfgSpeed100M); + + // TODO: duplex change requires disable/enable of Ethernet interface, to be implemented + + prev_state = crt_state; + osDelay(PHY_TASK_PERIOD_MS); + } +} + +/** + * Should be called at the beginning of the program to set up the + * network interface. + * + * This function should be passed as a parameter to netif_add(). + * + * @param[in] netif the lwip network interface structure for this netif + * @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 eth_arch_enetif_init(struct netif *netif) +{ + err_t err; + + LWIP_ASSERT("netif != NULL", (netif != NULL)); + + k64f_enetdata.netif = netif; + + /* set MAC hardware address */ +#if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE) + netif->hwaddr[0] = MBED_MAC_ADDR_0; + netif->hwaddr[1] = MBED_MAC_ADDR_1; + netif->hwaddr[2] = MBED_MAC_ADDR_2; + netif->hwaddr[3] = MBED_MAC_ADDR_3; + netif->hwaddr[4] = MBED_MAC_ADDR_4; + netif->hwaddr[5] = MBED_MAC_ADDR_5; +#else + mbed_mac_address((char *)netif->hwaddr); +#endif + netif->hwaddr_len = ETHARP_HWADDR_LEN; + + /* maximum transfer unit */ + netif->mtu = 1500; + + /* device capabilities */ + // TODOETH: check if the flags are correct below + netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET | NETIF_FLAG_IGMP; + + /* Initialize the hardware */ + netif->state = &k64f_enetdata; + err = low_level_init(netif); + if (err != ERR_OK) + return err; + +#if LWIP_NETIF_HOSTNAME + /* Initialize interface hostname */ + netif->hostname = "lwipk64f"; +#endif /* LWIP_NETIF_HOSTNAME */ + + netif->name[0] = 'e'; + netif->name[1] = 'n'; + + netif->output = k64f_etharp_output; + netif->linkoutput = k64f_low_level_output; + + /* CMSIS-RTOS, start tasks */ +#ifdef CMSIS_OS_RTX + memset(k64f_enetdata.xTXDCountSem.data, 0, sizeof(k64f_enetdata.xTXDCountSem.data)); + k64f_enetdata.xTXDCountSem.def.semaphore = k64f_enetdata.xTXDCountSem.data; +#endif + k64f_enetdata.xTXDCountSem.id = osSemaphoreCreate(&k64f_enetdata.xTXDCountSem.def, ENET_TX_RING_LEN); + + LWIP_ASSERT("xTXDCountSem creation error", (k64f_enetdata.xTXDCountSem.id != NULL)); + + err = sys_mutex_new(&k64f_enetdata.TXLockMutex); + LWIP_ASSERT("TXLockMutex creation error", (err == ERR_OK)); + + /* Packet receive task */ + err = sys_sem_new(&k64f_enetdata.RxReadySem, 0); + LWIP_ASSERT("RxReadySem creation error", (err == ERR_OK)); + sys_thread_new("receive_thread", packet_rx, netif->state, DEFAULT_THREAD_STACKSIZE, RX_PRIORITY); + + /* Transmit cleanup task */ + err = sys_sem_new(&k64f_enetdata.TxCleanSem, 0); + LWIP_ASSERT("TxCleanSem creation error", (err == ERR_OK)); + sys_thread_new("txclean_thread", packet_tx, netif->state, DEFAULT_THREAD_STACKSIZE, TX_PRIORITY); + + /* PHY monitoring task */ + sys_thread_new("phy_thread", k64f_phy_task, netif, DEFAULT_THREAD_STACKSIZE, PHY_PRIORITY); + + /* Allow the PHY task to detect the initial link state and set up the proper flags */ + osDelay(10); + + return ERR_OK; +} + +void eth_arch_enable_interrupts(void) { + enet_hal_config_interrupt(BOARD_DEBUG_ENET_INSTANCE_ADDR, (kEnetTxFrameInterrupt | kEnetRxFrameInterrupt), true); + INT_SYS_EnableIRQ(enet_irq_ids[BOARD_DEBUG_ENET_INSTANCE][enetIntMap[kEnetRxfInt]]); + INT_SYS_EnableIRQ(enet_irq_ids[BOARD_DEBUG_ENET_INSTANCE][enetIntMap[kEnetTxfInt]]); +} + +void eth_arch_disable_interrupts(void) { + INT_SYS_DisableIRQ(enet_irq_ids[BOARD_DEBUG_ENET_INSTANCE][enetIntMap[kEnetRxfInt]]); + INT_SYS_DisableIRQ(enet_irq_ids[BOARD_DEBUG_ENET_INSTANCE][enetIntMap[kEnetTxfInt]]); +} + +void ENET_Transmit_IRQHandler(void) +{ + enet_mac_tx_isr(enetIfHandle); +} + +void ENET_Receive_IRQHandler(void) +{ + enet_mac_rx_isr(enetIfHandle); +} + +#if FSL_FEATURE_ENET_SUPPORT_PTP +void ENET_1588_Timer_IRQHandler(void) +{ + enet_mac_ts_isr(enetIfHandle); +} +#endif +/** + * @} + */ + +/* --------------------------------- End Of File ------------------------------ */ + |