bruno wandrey / lwip-eth

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Fork of lwip-eth by mbed official

arch/TARGET_NXP/lpc17_emac.c@34:149bcaa1058c, 2017-12-13 (annotated)

Committer:
aookami
Date:
Wed Dec 13 20:00:53 2017 +0000
Revision:
34:149bcaa1058c
Parent:
33:9de8bd8ca1c8 
wep

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 33:9de8bd8ca1c8 1 /**********************************************************************
mbed_official 33:9de8bd8ca1c8 2 * $Id$ lpc17_emac.c 2011-11-20
mbed_official 33:9de8bd8ca1c8 3 *//**
mbed_official 33:9de8bd8ca1c8 4 * @file lpc17_emac.c
mbed_official 33:9de8bd8ca1c8 5 * @brief LPC17 ethernet driver for LWIP
mbed_official 33:9de8bd8ca1c8 6 * @version 1.0
mbed_official 33:9de8bd8ca1c8 7 * @date 20. Nov. 2011
mbed_official 33:9de8bd8ca1c8 8 * @author NXP MCU SW Application Team
mbed_official 33:9de8bd8ca1c8 9 *
mbed_official 33:9de8bd8ca1c8 10 * Copyright(C) 2011, NXP Semiconductor
mbed_official 33:9de8bd8ca1c8 11 * All rights reserved.
mbed_official 33:9de8bd8ca1c8 12 *
mbed_official 33:9de8bd8ca1c8 13 ***********************************************************************
mbed_official 33:9de8bd8ca1c8 14 * Software that is described herein is for illustrative purposes only
mbed_official 33:9de8bd8ca1c8 15 * which provides customers with programming information regarding the
mbed_official 33:9de8bd8ca1c8 16 * products. This software is supplied "AS IS" without any warranties.
mbed_official 33:9de8bd8ca1c8 17 * NXP Semiconductors assumes no responsibility or liability for the
mbed_official 33:9de8bd8ca1c8 18 * use of the software, conveys no license or title under any patent,
mbed_official 33:9de8bd8ca1c8 19 * copyright, or mask work right to the product. NXP Semiconductors
mbed_official 33:9de8bd8ca1c8 20 * reserves the right to make changes in the software without
mbed_official 33:9de8bd8ca1c8 21 * notification. NXP Semiconductors also make no representation or
mbed_official 33:9de8bd8ca1c8 22 * warranty that such application will be suitable for the specified
mbed_official 33:9de8bd8ca1c8 23 * use without further testing or modification.
mbed_official 33:9de8bd8ca1c8 24 **********************************************************************/
mbed_official 33:9de8bd8ca1c8 25
mbed_official 33:9de8bd8ca1c8 26 #include "lwip/opt.h"
mbed_official 33:9de8bd8ca1c8 27 #include "lwip/sys.h"
mbed_official 33:9de8bd8ca1c8 28 #include "lwip/def.h"
mbed_official 33:9de8bd8ca1c8 29 #include "lwip/mem.h"
mbed_official 33:9de8bd8ca1c8 30 #include "lwip/pbuf.h"
mbed_official 33:9de8bd8ca1c8 31 #include "lwip/stats.h"
mbed_official 33:9de8bd8ca1c8 32 #include "lwip/snmp.h"
mbed_official 33:9de8bd8ca1c8 33 #include "netif/etharp.h"
mbed_official 33:9de8bd8ca1c8 34 #include "netif/ppp_oe.h"
mbed_official 33:9de8bd8ca1c8 35
mbed_official 33:9de8bd8ca1c8 36 #include "lpc17xx_emac.h"
mbed_official 33:9de8bd8ca1c8 37 #include "eth_arch.h"
mbed_official 33:9de8bd8ca1c8 38 #include "lpc_emac_config.h"
mbed_official 33:9de8bd8ca1c8 39 #include "lpc_phy.h"
mbed_official 33:9de8bd8ca1c8 40 #include "sys_arch.h"
mbed_official 33:9de8bd8ca1c8 41
mbed_official 33:9de8bd8ca1c8 42 #include "mbed_interface.h"
mbed_official 33:9de8bd8ca1c8 43 #include <string.h>
mbed_official 33:9de8bd8ca1c8 44
mbed_official 33:9de8bd8ca1c8 45 #ifndef LPC_EMAC_RMII
mbed_official 33:9de8bd8ca1c8 46 #error LPC_EMAC_RMII is not defined!
mbed_official 33:9de8bd8ca1c8 47 #endif
mbed_official 33:9de8bd8ca1c8 48
mbed_official 33:9de8bd8ca1c8 49 #if LPC_NUM_BUFF_TXDESCS < 2
mbed_official 33:9de8bd8ca1c8 50 #error LPC_NUM_BUFF_TXDESCS must be at least 2
mbed_official 33:9de8bd8ca1c8 51 #endif
mbed_official 33:9de8bd8ca1c8 52
mbed_official 33:9de8bd8ca1c8 53 #if LPC_NUM_BUFF_RXDESCS < 3
mbed_official 33:9de8bd8ca1c8 54 #error LPC_NUM_BUFF_RXDESCS must be at least 3
mbed_official 33:9de8bd8ca1c8 55 #endif
mbed_official 33:9de8bd8ca1c8 56
mbed_official 33:9de8bd8ca1c8 57 /** @defgroup lwip17xx_emac_DRIVER lpc17 EMAC driver for LWIP
mbed_official 33:9de8bd8ca1c8 58 * @ingroup lwip_emac
mbed_official 33:9de8bd8ca1c8 59 *
mbed_official 33:9de8bd8ca1c8 60 * @{
mbed_official 33:9de8bd8ca1c8 61 */
mbed_official 33:9de8bd8ca1c8 62
mbed_official 33:9de8bd8ca1c8 63 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 64 /** \brief Driver transmit and receive thread priorities
mbed_official 33:9de8bd8ca1c8 65 *
mbed_official 33:9de8bd8ca1c8 66 * Thread priorities for receive thread and TX cleanup thread. Alter
mbed_official 33:9de8bd8ca1c8 67 * to prioritize receive or transmit bandwidth. In a heavily loaded
mbed_official 33:9de8bd8ca1c8 68 * system or with LEIP_DEBUG enabled, the priorities might be better
mbed_official 33:9de8bd8ca1c8 69 * the same. */
mbed_official 33:9de8bd8ca1c8 70 #define RX_PRIORITY (osPriorityNormal)
mbed_official 33:9de8bd8ca1c8 71 #define TX_PRIORITY (osPriorityNormal)
mbed_official 33:9de8bd8ca1c8 72
mbed_official 33:9de8bd8ca1c8 73 /** \brief Debug output formatter lock define
mbed_official 33:9de8bd8ca1c8 74 *
mbed_official 33:9de8bd8ca1c8 75 * When using FreeRTOS and with LWIP_DEBUG enabled, enabling this
mbed_official 33:9de8bd8ca1c8 76 * define will allow RX debug messages to not interleave with the
mbed_official 33:9de8bd8ca1c8 77 * TX messages (so they are actually readable). Not enabling this
mbed_official 33:9de8bd8ca1c8 78 * define when the system is under load will cause the output to
mbed_official 33:9de8bd8ca1c8 79 * be unreadable. There is a small tradeoff in performance for this
mbed_official 33:9de8bd8ca1c8 80 * so use it only for debug. */
mbed_official 33:9de8bd8ca1c8 81 //#define LOCK_RX_THREAD
mbed_official 33:9de8bd8ca1c8 82
mbed_official 33:9de8bd8ca1c8 83 /** \brief Receive group interrupts
mbed_official 33:9de8bd8ca1c8 84 */
mbed_official 33:9de8bd8ca1c8 85 #define RXINTGROUP (EMAC_INT_RX_OVERRUN | EMAC_INT_RX_ERR | EMAC_INT_RX_DONE)
mbed_official 33:9de8bd8ca1c8 86
mbed_official 33:9de8bd8ca1c8 87 /** \brief Transmit group interrupts
mbed_official 33:9de8bd8ca1c8 88 */
mbed_official 33:9de8bd8ca1c8 89 #define TXINTGROUP (EMAC_INT_TX_UNDERRUN | EMAC_INT_TX_ERR | EMAC_INT_TX_DONE)
mbed_official 33:9de8bd8ca1c8 90
mbed_official 33:9de8bd8ca1c8 91 /** \brief Signal used for ethernet ISR to signal packet_rx() thread.
mbed_official 33:9de8bd8ca1c8 92 */
mbed_official 33:9de8bd8ca1c8 93 #define RX_SIGNAL 1
mbed_official 33:9de8bd8ca1c8 94
mbed_official 33:9de8bd8ca1c8 95 #else
mbed_official 33:9de8bd8ca1c8 96 #define RXINTGROUP 0
mbed_official 33:9de8bd8ca1c8 97 #define TXINTGROUP 0
mbed_official 33:9de8bd8ca1c8 98 #endif
mbed_official 33:9de8bd8ca1c8 99
mbed_official 33:9de8bd8ca1c8 100 /** \brief Structure of a TX/RX descriptor
mbed_official 33:9de8bd8ca1c8 101 */
mbed_official 33:9de8bd8ca1c8 102 typedef struct
mbed_official 33:9de8bd8ca1c8 103 {
mbed_official 33:9de8bd8ca1c8 104 volatile u32_t packet; /**< Pointer to buffer */
mbed_official 33:9de8bd8ca1c8 105 volatile u32_t control; /**< Control word */
mbed_official 33:9de8bd8ca1c8 106 } LPC_TXRX_DESC_T;
mbed_official 33:9de8bd8ca1c8 107
mbed_official 33:9de8bd8ca1c8 108 /** \brief Structure of a RX status entry
mbed_official 33:9de8bd8ca1c8 109 */
mbed_official 33:9de8bd8ca1c8 110 typedef struct
mbed_official 33:9de8bd8ca1c8 111 {
mbed_official 33:9de8bd8ca1c8 112 volatile u32_t statusinfo; /**< RX status word */
mbed_official 33:9de8bd8ca1c8 113 volatile u32_t statushashcrc; /**< RX hash CRC */
mbed_official 33:9de8bd8ca1c8 114 } LPC_TXRX_STATUS_T;
mbed_official 33:9de8bd8ca1c8 115
mbed_official 33:9de8bd8ca1c8 116 /* LPC EMAC driver data structure */
mbed_official 33:9de8bd8ca1c8 117 struct lpc_enetdata {
mbed_official 33:9de8bd8ca1c8 118 /* prxs must be 8 byte aligned! */
mbed_official 33:9de8bd8ca1c8 119 LPC_TXRX_STATUS_T prxs[LPC_NUM_BUFF_RXDESCS]; /**< Pointer to RX statuses */
mbed_official 33:9de8bd8ca1c8 120 struct netif *netif; /**< Reference back to LWIP parent netif */
mbed_official 33:9de8bd8ca1c8 121 LPC_TXRX_DESC_T ptxd[LPC_NUM_BUFF_TXDESCS]; /**< Pointer to TX descriptor list */
mbed_official 33:9de8bd8ca1c8 122 LPC_TXRX_STATUS_T ptxs[LPC_NUM_BUFF_TXDESCS]; /**< Pointer to TX statuses */
mbed_official 33:9de8bd8ca1c8 123 LPC_TXRX_DESC_T prxd[LPC_NUM_BUFF_RXDESCS]; /**< Pointer to RX descriptor list */
mbed_official 33:9de8bd8ca1c8 124 struct pbuf *rxb[LPC_NUM_BUFF_RXDESCS]; /**< RX pbuf pointer list, zero-copy mode */
mbed_official 33:9de8bd8ca1c8 125 u32_t rx_fill_desc_index; /**< RX descriptor next available index */
mbed_official 33:9de8bd8ca1c8 126 volatile u32_t rx_free_descs; /**< Count of free RX descriptors */
mbed_official 33:9de8bd8ca1c8 127 struct pbuf *txb[LPC_NUM_BUFF_TXDESCS]; /**< TX pbuf pointer list, zero-copy mode */
mbed_official 33:9de8bd8ca1c8 128 u32_t lpc_last_tx_idx; /**< TX last descriptor index, zero-copy mode */
mbed_official 33:9de8bd8ca1c8 129 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 130 sys_thread_t RxThread; /**< RX receive thread data object pointer */
mbed_official 33:9de8bd8ca1c8 131 sys_sem_t TxCleanSem; /**< TX cleanup thread wakeup semaphore */
mbed_official 33:9de8bd8ca1c8 132 sys_mutex_t TXLockMutex; /**< TX critical section mutex */
mbed_official 33:9de8bd8ca1c8 133 sys_sem_t xTXDCountSem; /**< TX free buffer counting semaphore */
mbed_official 33:9de8bd8ca1c8 134 #endif
mbed_official 33:9de8bd8ca1c8 135 };
mbed_official 33:9de8bd8ca1c8 136
mbed_official 33:9de8bd8ca1c8 137 #if defined(TARGET_LPC4088) || defined(TARGET_LPC4088_DM)
mbed_official 33:9de8bd8ca1c8 138 # if defined (__ICCARM__)
mbed_official 33:9de8bd8ca1c8 139 # define ETHMEM_SECTION
mbed_official 33:9de8bd8ca1c8 140 # elif defined(TOOLCHAIN_GCC_CR)
mbed_official 33:9de8bd8ca1c8 141 # define ETHMEM_SECTION __attribute__((section(".data.$RamPeriph32"), aligned))
mbed_official 33:9de8bd8ca1c8 142 # else
mbed_official 33:9de8bd8ca1c8 143 # define ETHMEM_SECTION __attribute__((section("AHBSRAM1"),aligned))
mbed_official 33:9de8bd8ca1c8 144 # endif
mbed_official 33:9de8bd8ca1c8 145 #elif defined(TARGET_LPC1768)
mbed_official 33:9de8bd8ca1c8 146 # if defined(TOOLCHAIN_GCC_ARM)
mbed_official 33:9de8bd8ca1c8 147 # define ETHMEM_SECTION __attribute__((section("AHBSRAM1"),aligned))
mbed_official 33:9de8bd8ca1c8 148 # endif
mbed_official 33:9de8bd8ca1c8 149 #endif
mbed_official 33:9de8bd8ca1c8 150
mbed_official 33:9de8bd8ca1c8 151 #ifndef ETHMEM_SECTION
mbed_official 33:9de8bd8ca1c8 152 #define ETHMEM_SECTION ALIGNED(8)
mbed_official 33:9de8bd8ca1c8 153 #endif
mbed_official 33:9de8bd8ca1c8 154
mbed_official 33:9de8bd8ca1c8 155 /** \brief LPC EMAC driver work data
mbed_official 33:9de8bd8ca1c8 156 */
mbed_official 33:9de8bd8ca1c8 157 ETHMEM_SECTION struct lpc_enetdata lpc_enetdata;
mbed_official 33:9de8bd8ca1c8 158
mbed_official 33:9de8bd8ca1c8 159 /** \brief Queues a pbuf into the RX descriptor list
mbed_official 33:9de8bd8ca1c8 160 *
mbed_official 33:9de8bd8ca1c8 161 * \param[in] lpc_enetif Pointer to the drvier data structure
mbed_official 33:9de8bd8ca1c8 162 * \param[in] p Pointer to pbuf to queue
mbed_official 33:9de8bd8ca1c8 163 */
mbed_official 33:9de8bd8ca1c8 164 static void lpc_rxqueue_pbuf(struct lpc_enetdata *lpc_enetif, struct pbuf *p)
mbed_official 33:9de8bd8ca1c8 165 {
mbed_official 33:9de8bd8ca1c8 166 u32_t idx;
mbed_official 33:9de8bd8ca1c8 167
mbed_official 33:9de8bd8ca1c8 168 /* Get next free descriptor index */
mbed_official 33:9de8bd8ca1c8 169 idx = lpc_enetif->rx_fill_desc_index;
mbed_official 33:9de8bd8ca1c8 170
mbed_official 33:9de8bd8ca1c8 171 /* Setup descriptor and clear statuses */
mbed_official 33:9de8bd8ca1c8 172 lpc_enetif->prxd[idx].control = EMAC_RCTRL_INT | ((u32_t) (p->len - 1));
mbed_official 33:9de8bd8ca1c8 173 lpc_enetif->prxd[idx].packet = (u32_t) p->payload;
mbed_official 33:9de8bd8ca1c8 174 lpc_enetif->prxs[idx].statusinfo = 0xFFFFFFFF;
mbed_official 33:9de8bd8ca1c8 175 lpc_enetif->prxs[idx].statushashcrc = 0xFFFFFFFF;
mbed_official 33:9de8bd8ca1c8 176
mbed_official 33:9de8bd8ca1c8 177 /* Save pbuf pointer for push to network layer later */
mbed_official 33:9de8bd8ca1c8 178 lpc_enetif->rxb[idx] = p;
mbed_official 33:9de8bd8ca1c8 179
mbed_official 33:9de8bd8ca1c8 180 /* Wrap at end of descriptor list */
mbed_official 33:9de8bd8ca1c8 181 idx++;
mbed_official 33:9de8bd8ca1c8 182 if (idx >= LPC_NUM_BUFF_RXDESCS)
mbed_official 33:9de8bd8ca1c8 183 idx = 0;
mbed_official 33:9de8bd8ca1c8 184
mbed_official 33:9de8bd8ca1c8 185 /* Queue descriptor(s) */
mbed_official 33:9de8bd8ca1c8 186 lpc_enetif->rx_free_descs -= 1;
mbed_official 33:9de8bd8ca1c8 187 lpc_enetif->rx_fill_desc_index = idx;
mbed_official 33:9de8bd8ca1c8 188 LPC_EMAC->RxConsumeIndex = idx;
mbed_official 33:9de8bd8ca1c8 189
mbed_official 33:9de8bd8ca1c8 190 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 33:9de8bd8ca1c8 191 ("lpc_rxqueue_pbuf: pbuf packet queued: %p (free desc=%d)\n", p,
mbed_official 33:9de8bd8ca1c8 192 lpc_enetif->rx_free_descs));
mbed_official 33:9de8bd8ca1c8 193 }
mbed_official 33:9de8bd8ca1c8 194
mbed_official 33:9de8bd8ca1c8 195 /** \brief Attempt to allocate and requeue a new pbuf for RX
mbed_official 33:9de8bd8ca1c8 196 *
mbed_official 33:9de8bd8ca1c8 197 * \param[in] netif Pointer to the netif structure
mbed_official 33:9de8bd8ca1c8 198 * \returns 1 if a packet was allocated and requeued, otherwise 0
mbed_official 33:9de8bd8ca1c8 199 */
mbed_official 33:9de8bd8ca1c8 200 s32_t lpc_rx_queue(struct netif *netif)
mbed_official 33:9de8bd8ca1c8 201 {
mbed_official 33:9de8bd8ca1c8 202 struct lpc_enetdata *lpc_enetif = netif->state;
mbed_official 33:9de8bd8ca1c8 203 struct pbuf *p;
mbed_official 33:9de8bd8ca1c8 204 s32_t queued = 0;
mbed_official 33:9de8bd8ca1c8 205
mbed_official 33:9de8bd8ca1c8 206 /* Attempt to requeue as many packets as possible */
mbed_official 33:9de8bd8ca1c8 207 while (lpc_enetif->rx_free_descs > 0) {
mbed_official 33:9de8bd8ca1c8 208 /* Allocate a pbuf from the pool. We need to allocate at the
mbed_official 33:9de8bd8ca1c8 209 maximum size as we don't know the size of the yet to be
mbed_official 33:9de8bd8ca1c8 210 received packet. */
mbed_official 33:9de8bd8ca1c8 211 p = pbuf_alloc(PBUF_RAW, (u16_t) EMAC_ETH_MAX_FLEN, PBUF_RAM);
mbed_official 33:9de8bd8ca1c8 212 if (p == NULL) {
mbed_official 33:9de8bd8ca1c8 213 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 33:9de8bd8ca1c8 214 ("lpc_rx_queue: could not allocate RX pbuf (free desc=%d)\n",
mbed_official 33:9de8bd8ca1c8 215 lpc_enetif->rx_free_descs));
mbed_official 33:9de8bd8ca1c8 216 return queued;
mbed_official 33:9de8bd8ca1c8 217 }
mbed_official 33:9de8bd8ca1c8 218
mbed_official 33:9de8bd8ca1c8 219 /* pbufs allocated from the RAM pool should be non-chained. */
mbed_official 33:9de8bd8ca1c8 220 LWIP_ASSERT("lpc_rx_queue: pbuf is not contiguous (chained)",
mbed_official 33:9de8bd8ca1c8 221 pbuf_clen(p) <= 1);
mbed_official 33:9de8bd8ca1c8 222
mbed_official 33:9de8bd8ca1c8 223 /* Queue packet */
mbed_official 33:9de8bd8ca1c8 224 lpc_rxqueue_pbuf(lpc_enetif, p);
mbed_official 33:9de8bd8ca1c8 225
mbed_official 33:9de8bd8ca1c8 226 /* Update queued count */
mbed_official 33:9de8bd8ca1c8 227 queued++;
mbed_official 33:9de8bd8ca1c8 228 }
mbed_official 33:9de8bd8ca1c8 229
mbed_official 33:9de8bd8ca1c8 230 return queued;
mbed_official 33:9de8bd8ca1c8 231 }
mbed_official 33:9de8bd8ca1c8 232
mbed_official 33:9de8bd8ca1c8 233 /** \brief Sets up the RX descriptor ring buffers.
mbed_official 33:9de8bd8ca1c8 234 *
mbed_official 33:9de8bd8ca1c8 235 * This function sets up the descriptor list used for receive packets.
mbed_official 33:9de8bd8ca1c8 236 *
mbed_official 33:9de8bd8ca1c8 237 * \param[in] lpc_enetif Pointer to driver data structure
mbed_official 33:9de8bd8ca1c8 238 * \returns Always returns ERR_OK
mbed_official 33:9de8bd8ca1c8 239 */
mbed_official 33:9de8bd8ca1c8 240 static err_t lpc_rx_setup(struct lpc_enetdata *lpc_enetif)
mbed_official 33:9de8bd8ca1c8 241 {
mbed_official 33:9de8bd8ca1c8 242 /* Setup pointers to RX structures */
mbed_official 33:9de8bd8ca1c8 243 LPC_EMAC->RxDescriptor = (u32_t) &lpc_enetif->prxd[0];
mbed_official 33:9de8bd8ca1c8 244 LPC_EMAC->RxStatus = (u32_t) &lpc_enetif->prxs[0];
mbed_official 33:9de8bd8ca1c8 245 LPC_EMAC->RxDescriptorNumber = LPC_NUM_BUFF_RXDESCS - 1;
mbed_official 33:9de8bd8ca1c8 246
mbed_official 33:9de8bd8ca1c8 247 lpc_enetif->rx_free_descs = LPC_NUM_BUFF_RXDESCS;
mbed_official 33:9de8bd8ca1c8 248 lpc_enetif->rx_fill_desc_index = 0;
mbed_official 33:9de8bd8ca1c8 249
mbed_official 33:9de8bd8ca1c8 250 /* Build RX buffer and descriptors */
mbed_official 33:9de8bd8ca1c8 251 lpc_rx_queue(lpc_enetif->netif);
mbed_official 33:9de8bd8ca1c8 252
mbed_official 33:9de8bd8ca1c8 253 return ERR_OK;
mbed_official 33:9de8bd8ca1c8 254 }
mbed_official 33:9de8bd8ca1c8 255
mbed_official 33:9de8bd8ca1c8 256 /** \brief Allocates a pbuf and returns the data from the incoming packet.
mbed_official 33:9de8bd8ca1c8 257 *
mbed_official 33:9de8bd8ca1c8 258 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 33:9de8bd8ca1c8 259 * \return a pbuf filled with the received packet (including MAC header)
mbed_official 33:9de8bd8ca1c8 260 * NULL on memory error
mbed_official 33:9de8bd8ca1c8 261 */
mbed_official 33:9de8bd8ca1c8 262 static struct pbuf *lpc_low_level_input(struct netif *netif)
mbed_official 33:9de8bd8ca1c8 263 {
mbed_official 33:9de8bd8ca1c8 264 struct lpc_enetdata *lpc_enetif = netif->state;
mbed_official 33:9de8bd8ca1c8 265 struct pbuf *p = NULL;
mbed_official 33:9de8bd8ca1c8 266 u32_t idx, length;
mbed_official 33:9de8bd8ca1c8 267 u16_t origLength;
mbed_official 33:9de8bd8ca1c8 268
mbed_official 33:9de8bd8ca1c8 269 #ifdef LOCK_RX_THREAD
mbed_official 33:9de8bd8ca1c8 270 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 271 /* Get exclusive access */
mbed_official 33:9de8bd8ca1c8 272 sys_mutex_lock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 273 #endif
mbed_official 33:9de8bd8ca1c8 274 #endif
mbed_official 33:9de8bd8ca1c8 275
mbed_official 33:9de8bd8ca1c8 276 /* Monitor RX overrun status. This should never happen unless
mbed_official 33:9de8bd8ca1c8 277 (possibly) the internal bus is behing held up by something.
mbed_official 33:9de8bd8ca1c8 278 Unless your system is running at a very low clock speed or
mbed_official 33:9de8bd8ca1c8 279 there are possibilities that the internal buses may be held
mbed_official 33:9de8bd8ca1c8 280 up for a long time, this can probably safely be removed. */
mbed_official 33:9de8bd8ca1c8 281 if (LPC_EMAC->IntStatus & EMAC_INT_RX_OVERRUN) {
mbed_official 33:9de8bd8ca1c8 282 LINK_STATS_INC(link.err);
mbed_official 33:9de8bd8ca1c8 283 LINK_STATS_INC(link.drop);
mbed_official 33:9de8bd8ca1c8 284
mbed_official 33:9de8bd8ca1c8 285 /* Temporarily disable RX */
mbed_official 33:9de8bd8ca1c8 286 LPC_EMAC->MAC1 &= ~EMAC_MAC1_REC_EN;
mbed_official 33:9de8bd8ca1c8 287
mbed_official 33:9de8bd8ca1c8 288 /* Reset the RX side */
mbed_official 33:9de8bd8ca1c8 289 LPC_EMAC->MAC1 |= EMAC_MAC1_RES_RX;
mbed_official 33:9de8bd8ca1c8 290 LPC_EMAC->IntClear = EMAC_INT_RX_OVERRUN;
mbed_official 33:9de8bd8ca1c8 291
mbed_official 33:9de8bd8ca1c8 292 /* De-allocate all queued RX pbufs */
mbed_official 33:9de8bd8ca1c8 293 for (idx = 0; idx < LPC_NUM_BUFF_RXDESCS; idx++) {
mbed_official 33:9de8bd8ca1c8 294 if (lpc_enetif->rxb[idx] != NULL) {
mbed_official 33:9de8bd8ca1c8 295 pbuf_free(lpc_enetif->rxb[idx]);
mbed_official 33:9de8bd8ca1c8 296 lpc_enetif->rxb[idx] = NULL;
mbed_official 33:9de8bd8ca1c8 297 }
mbed_official 33:9de8bd8ca1c8 298 }
mbed_official 33:9de8bd8ca1c8 299
mbed_official 33:9de8bd8ca1c8 300 /* Start RX side again */
mbed_official 33:9de8bd8ca1c8 301 lpc_rx_setup(lpc_enetif);
mbed_official 33:9de8bd8ca1c8 302
mbed_official 33:9de8bd8ca1c8 303 /* Re-enable RX */
mbed_official 33:9de8bd8ca1c8 304 LPC_EMAC->MAC1 |= EMAC_MAC1_REC_EN;
mbed_official 33:9de8bd8ca1c8 305
mbed_official 33:9de8bd8ca1c8 306 #ifdef LOCK_RX_THREAD
mbed_official 33:9de8bd8ca1c8 307 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 308 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 309 #endif
mbed_official 33:9de8bd8ca1c8 310 #endif
mbed_official 33:9de8bd8ca1c8 311
mbed_official 33:9de8bd8ca1c8 312 return NULL;
mbed_official 33:9de8bd8ca1c8 313 }
mbed_official 33:9de8bd8ca1c8 314
mbed_official 33:9de8bd8ca1c8 315 /* Determine if a frame has been received */
mbed_official 33:9de8bd8ca1c8 316 length = 0;
mbed_official 33:9de8bd8ca1c8 317 idx = LPC_EMAC->RxConsumeIndex;
mbed_official 33:9de8bd8ca1c8 318 if (LPC_EMAC->RxProduceIndex != idx) {
mbed_official 33:9de8bd8ca1c8 319 /* Handle errors */
mbed_official 33:9de8bd8ca1c8 320 if (lpc_enetif->prxs[idx].statusinfo & (EMAC_RINFO_CRC_ERR |
mbed_official 33:9de8bd8ca1c8 321 EMAC_RINFO_SYM_ERR | EMAC_RINFO_ALIGN_ERR | EMAC_RINFO_LEN_ERR)) {
mbed_official 33:9de8bd8ca1c8 322 #if LINK_STATS
mbed_official 33:9de8bd8ca1c8 323 if (lpc_enetif->prxs[idx].statusinfo & (EMAC_RINFO_CRC_ERR |
mbed_official 33:9de8bd8ca1c8 324 EMAC_RINFO_SYM_ERR | EMAC_RINFO_ALIGN_ERR))
mbed_official 33:9de8bd8ca1c8 325 LINK_STATS_INC(link.chkerr);
mbed_official 33:9de8bd8ca1c8 326 if (lpc_enetif->prxs[idx].statusinfo & EMAC_RINFO_LEN_ERR)
mbed_official 33:9de8bd8ca1c8 327 LINK_STATS_INC(link.lenerr);
mbed_official 33:9de8bd8ca1c8 328 #endif
mbed_official 33:9de8bd8ca1c8 329
mbed_official 33:9de8bd8ca1c8 330 /* Drop the frame */
mbed_official 33:9de8bd8ca1c8 331 LINK_STATS_INC(link.drop);
mbed_official 33:9de8bd8ca1c8 332
mbed_official 33:9de8bd8ca1c8 333 /* Re-queue the pbuf for receive */
mbed_official 33:9de8bd8ca1c8 334 lpc_enetif->rx_free_descs++;
mbed_official 33:9de8bd8ca1c8 335 p = lpc_enetif->rxb[idx];
mbed_official 33:9de8bd8ca1c8 336 lpc_enetif->rxb[idx] = NULL;
mbed_official 33:9de8bd8ca1c8 337 lpc_rxqueue_pbuf(lpc_enetif, p);
mbed_official 33:9de8bd8ca1c8 338
mbed_official 33:9de8bd8ca1c8 339 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 33:9de8bd8ca1c8 340 ("lpc_low_level_input: Packet dropped with errors (0x%x)\n",
mbed_official 33:9de8bd8ca1c8 341 lpc_enetif->prxs[idx].statusinfo));
mbed_official 33:9de8bd8ca1c8 342
mbed_official 33:9de8bd8ca1c8 343 p = NULL;
mbed_official 33:9de8bd8ca1c8 344 } else {
mbed_official 33:9de8bd8ca1c8 345 /* A packet is waiting, get length */
mbed_official 33:9de8bd8ca1c8 346 length = (lpc_enetif->prxs[idx].statusinfo & 0x7FF) + 1;
mbed_official 33:9de8bd8ca1c8 347
mbed_official 33:9de8bd8ca1c8 348 /* Zero-copy */
mbed_official 33:9de8bd8ca1c8 349 p = lpc_enetif->rxb[idx];
mbed_official 33:9de8bd8ca1c8 350 origLength = p->len;
mbed_official 33:9de8bd8ca1c8 351 p->len = (u16_t) length;
mbed_official 33:9de8bd8ca1c8 352
mbed_official 33:9de8bd8ca1c8 353 /* Free pbuf from descriptor */
mbed_official 33:9de8bd8ca1c8 354 lpc_enetif->rxb[idx] = NULL;
mbed_official 33:9de8bd8ca1c8 355 lpc_enetif->rx_free_descs++;
mbed_official 33:9de8bd8ca1c8 356
mbed_official 33:9de8bd8ca1c8 357 /* Attempt to queue new buffer(s) */
mbed_official 33:9de8bd8ca1c8 358 if (lpc_rx_queue(lpc_enetif->netif) == 0) {
mbed_official 33:9de8bd8ca1c8 359 /* Drop the frame due to OOM. */
mbed_official 33:9de8bd8ca1c8 360 LINK_STATS_INC(link.drop);
mbed_official 33:9de8bd8ca1c8 361
mbed_official 33:9de8bd8ca1c8 362 /* Re-queue the pbuf for receive */
mbed_official 33:9de8bd8ca1c8 363 p->len = origLength;
mbed_official 33:9de8bd8ca1c8 364 lpc_rxqueue_pbuf(lpc_enetif, p);
mbed_official 33:9de8bd8ca1c8 365
mbed_official 33:9de8bd8ca1c8 366 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 33:9de8bd8ca1c8 367 ("lpc_low_level_input: Packet index %d dropped for OOM\n",
mbed_official 33:9de8bd8ca1c8 368 idx));
mbed_official 33:9de8bd8ca1c8 369
mbed_official 33:9de8bd8ca1c8 370 #ifdef LOCK_RX_THREAD
mbed_official 33:9de8bd8ca1c8 371 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 372 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 373 #endif
mbed_official 33:9de8bd8ca1c8 374 #endif
mbed_official 33:9de8bd8ca1c8 375
mbed_official 33:9de8bd8ca1c8 376 return NULL;
mbed_official 33:9de8bd8ca1c8 377 }
mbed_official 33:9de8bd8ca1c8 378
mbed_official 33:9de8bd8ca1c8 379 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 33:9de8bd8ca1c8 380 ("lpc_low_level_input: Packet received: %p, size %d (index=%d)\n",
mbed_official 33:9de8bd8ca1c8 381 p, length, idx));
mbed_official 33:9de8bd8ca1c8 382
mbed_official 33:9de8bd8ca1c8 383 /* Save size */
mbed_official 33:9de8bd8ca1c8 384 p->tot_len = (u16_t) length;
mbed_official 33:9de8bd8ca1c8 385 LINK_STATS_INC(link.recv);
mbed_official 33:9de8bd8ca1c8 386 }
mbed_official 33:9de8bd8ca1c8 387 }
mbed_official 33:9de8bd8ca1c8 388
mbed_official 33:9de8bd8ca1c8 389 #ifdef LOCK_RX_THREAD
mbed_official 33:9de8bd8ca1c8 390 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 391 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 392 #endif
mbed_official 33:9de8bd8ca1c8 393 #endif
mbed_official 33:9de8bd8ca1c8 394
mbed_official 33:9de8bd8ca1c8 395 return p;
mbed_official 33:9de8bd8ca1c8 396 }
mbed_official 33:9de8bd8ca1c8 397
mbed_official 33:9de8bd8ca1c8 398 /** \brief Attempt to read a packet from the EMAC interface.
mbed_official 33:9de8bd8ca1c8 399 *
mbed_official 33:9de8bd8ca1c8 400 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 33:9de8bd8ca1c8 401 */
mbed_official 33:9de8bd8ca1c8 402 void lpc_enetif_input(struct netif *netif)
mbed_official 33:9de8bd8ca1c8 403 {
mbed_official 33:9de8bd8ca1c8 404 struct eth_hdr *ethhdr;
mbed_official 33:9de8bd8ca1c8 405 struct pbuf *p;
mbed_official 33:9de8bd8ca1c8 406
mbed_official 33:9de8bd8ca1c8 407 /* move received packet into a new pbuf */
mbed_official 33:9de8bd8ca1c8 408 p = lpc_low_level_input(netif);
mbed_official 33:9de8bd8ca1c8 409 if (p == NULL)
mbed_official 33:9de8bd8ca1c8 410 return;
mbed_official 33:9de8bd8ca1c8 411
mbed_official 33:9de8bd8ca1c8 412 /* points to packet payload, which starts with an Ethernet header */
mbed_official 33:9de8bd8ca1c8 413 ethhdr = p->payload;
mbed_official 33:9de8bd8ca1c8 414
mbed_official 33:9de8bd8ca1c8 415 switch (htons(ethhdr->type)) {
mbed_official 33:9de8bd8ca1c8 416 case ETHTYPE_IP:
mbed_official 33:9de8bd8ca1c8 417 case ETHTYPE_ARP:
mbed_official 33:9de8bd8ca1c8 418 #if PPPOE_SUPPORT
mbed_official 33:9de8bd8ca1c8 419 case ETHTYPE_PPPOEDISC:
mbed_official 33:9de8bd8ca1c8 420 case ETHTYPE_PPPOE:
mbed_official 33:9de8bd8ca1c8 421 #endif /* PPPOE_SUPPORT */
mbed_official 33:9de8bd8ca1c8 422 /* full packet send to tcpip_thread to process */
mbed_official 33:9de8bd8ca1c8 423 if (netif->input(p, netif) != ERR_OK) {
mbed_official 33:9de8bd8ca1c8 424 LWIP_DEBUGF(NETIF_DEBUG, ("lpc_enetif_input: IP input error\n"));
mbed_official 33:9de8bd8ca1c8 425 /* Free buffer */
mbed_official 33:9de8bd8ca1c8 426 pbuf_free(p);
mbed_official 33:9de8bd8ca1c8 427 }
mbed_official 33:9de8bd8ca1c8 428 break;
mbed_official 33:9de8bd8ca1c8 429
mbed_official 33:9de8bd8ca1c8 430 default:
mbed_official 33:9de8bd8ca1c8 431 /* Return buffer */
mbed_official 33:9de8bd8ca1c8 432 pbuf_free(p);
mbed_official 33:9de8bd8ca1c8 433 break;
mbed_official 33:9de8bd8ca1c8 434 }
mbed_official 33:9de8bd8ca1c8 435 }
mbed_official 33:9de8bd8ca1c8 436
mbed_official 33:9de8bd8ca1c8 437 /** \brief Determine if the passed address is usable for the ethernet
mbed_official 33:9de8bd8ca1c8 438 * DMA controller.
mbed_official 33:9de8bd8ca1c8 439 *
mbed_official 33:9de8bd8ca1c8 440 * \param[in] addr Address of packet to check for DMA safe operation
mbed_official 33:9de8bd8ca1c8 441 * \return 1 if the packet address is not safe, otherwise 0
mbed_official 33:9de8bd8ca1c8 442 */
mbed_official 33:9de8bd8ca1c8 443 static s32_t lpc_packet_addr_notsafe(void *addr) {
mbed_official 33:9de8bd8ca1c8 444 /* Check for legal address ranges */
mbed_official 33:9de8bd8ca1c8 445 #if defined(TARGET_LPC1768)
mbed_official 33:9de8bd8ca1c8 446 if ((((u32_t) addr >= 0x2007C000) && ((u32_t) addr < 0x20083FFF))) {
mbed_official 33:9de8bd8ca1c8 447 #elif defined(TARGET_LPC4088) || defined(TARGET_LPC4088_DM)
mbed_official 33:9de8bd8ca1c8 448 if ((((u32_t) addr >= 0x20000000) && ((u32_t) addr < 0x20007FFF))) {
mbed_official 33:9de8bd8ca1c8 449 #endif
mbed_official 33:9de8bd8ca1c8 450 return 0;
mbed_official 33:9de8bd8ca1c8 451 }
mbed_official 33:9de8bd8ca1c8 452 return 1;
mbed_official 33:9de8bd8ca1c8 453 }
mbed_official 33:9de8bd8ca1c8 454
mbed_official 33:9de8bd8ca1c8 455 /** \brief Sets up the TX descriptor ring buffers.
mbed_official 33:9de8bd8ca1c8 456 *
mbed_official 33:9de8bd8ca1c8 457 * This function sets up the descriptor list used for transmit packets.
mbed_official 33:9de8bd8ca1c8 458 *
mbed_official 33:9de8bd8ca1c8 459 * \param[in] lpc_enetif Pointer to driver data structure
mbed_official 33:9de8bd8ca1c8 460 */
mbed_official 33:9de8bd8ca1c8 461 static err_t lpc_tx_setup(struct lpc_enetdata *lpc_enetif)
mbed_official 33:9de8bd8ca1c8 462 {
mbed_official 33:9de8bd8ca1c8 463 s32_t idx;
mbed_official 33:9de8bd8ca1c8 464
mbed_official 33:9de8bd8ca1c8 465 /* Build TX descriptors for local buffers */
mbed_official 33:9de8bd8ca1c8 466 for (idx = 0; idx < LPC_NUM_BUFF_TXDESCS; idx++) {
mbed_official 33:9de8bd8ca1c8 467 lpc_enetif->ptxd[idx].control = 0;
mbed_official 33:9de8bd8ca1c8 468 lpc_enetif->ptxs[idx].statusinfo = 0xFFFFFFFF;
mbed_official 33:9de8bd8ca1c8 469 }
mbed_official 33:9de8bd8ca1c8 470
mbed_official 33:9de8bd8ca1c8 471 /* Setup pointers to TX structures */
mbed_official 33:9de8bd8ca1c8 472 LPC_EMAC->TxDescriptor = (u32_t) &lpc_enetif->ptxd[0];
mbed_official 33:9de8bd8ca1c8 473 LPC_EMAC->TxStatus = (u32_t) &lpc_enetif->ptxs[0];
mbed_official 33:9de8bd8ca1c8 474 LPC_EMAC->TxDescriptorNumber = LPC_NUM_BUFF_TXDESCS - 1;
mbed_official 33:9de8bd8ca1c8 475
mbed_official 33:9de8bd8ca1c8 476 lpc_enetif->lpc_last_tx_idx = 0;
mbed_official 33:9de8bd8ca1c8 477
mbed_official 33:9de8bd8ca1c8 478 return ERR_OK;
mbed_official 33:9de8bd8ca1c8 479 }
mbed_official 33:9de8bd8ca1c8 480
mbed_official 33:9de8bd8ca1c8 481 /** \brief Free TX buffers that are complete
mbed_official 33:9de8bd8ca1c8 482 *
mbed_official 33:9de8bd8ca1c8 483 * \param[in] lpc_enetif Pointer to driver data structure
mbed_official 33:9de8bd8ca1c8 484 * \param[in] cidx EMAC current descriptor comsumer index
mbed_official 33:9de8bd8ca1c8 485 */
mbed_official 33:9de8bd8ca1c8 486 static void lpc_tx_reclaim_st(struct lpc_enetdata *lpc_enetif, u32_t cidx)
mbed_official 33:9de8bd8ca1c8 487 {
mbed_official 33:9de8bd8ca1c8 488 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 489 /* Get exclusive access */
mbed_official 33:9de8bd8ca1c8 490 sys_mutex_lock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 491 #endif
mbed_official 33:9de8bd8ca1c8 492
mbed_official 33:9de8bd8ca1c8 493 while (cidx != lpc_enetif->lpc_last_tx_idx) {
mbed_official 33:9de8bd8ca1c8 494 if (lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx] != NULL) {
mbed_official 33:9de8bd8ca1c8 495 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 33:9de8bd8ca1c8 496 ("lpc_tx_reclaim_st: Freeing packet %p (index %d)\n",
mbed_official 33:9de8bd8ca1c8 497 lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx],
mbed_official 33:9de8bd8ca1c8 498 lpc_enetif->lpc_last_tx_idx));
mbed_official 33:9de8bd8ca1c8 499 pbuf_free(lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx]);
mbed_official 33:9de8bd8ca1c8 500 lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx] = NULL;
mbed_official 33:9de8bd8ca1c8 501 }
mbed_official 33:9de8bd8ca1c8 502
mbed_official 33:9de8bd8ca1c8 503 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 504 osSemaphoreRelease(lpc_enetif->xTXDCountSem.id);
mbed_official 33:9de8bd8ca1c8 505 #endif
mbed_official 33:9de8bd8ca1c8 506 lpc_enetif->lpc_last_tx_idx++;
mbed_official 33:9de8bd8ca1c8 507 if (lpc_enetif->lpc_last_tx_idx >= LPC_NUM_BUFF_TXDESCS)
mbed_official 33:9de8bd8ca1c8 508 lpc_enetif->lpc_last_tx_idx = 0;
mbed_official 33:9de8bd8ca1c8 509 }
mbed_official 33:9de8bd8ca1c8 510
mbed_official 33:9de8bd8ca1c8 511 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 512 /* Restore access */
mbed_official 33:9de8bd8ca1c8 513 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 514 #endif
mbed_official 33:9de8bd8ca1c8 515 }
mbed_official 33:9de8bd8ca1c8 516
mbed_official 33:9de8bd8ca1c8 517 /** \brief User call for freeingTX buffers that are complete
mbed_official 33:9de8bd8ca1c8 518 *
mbed_official 33:9de8bd8ca1c8 519 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 33:9de8bd8ca1c8 520 */
mbed_official 33:9de8bd8ca1c8 521 void lpc_tx_reclaim(struct netif *netif)
mbed_official 33:9de8bd8ca1c8 522 {
mbed_official 33:9de8bd8ca1c8 523 lpc_tx_reclaim_st((struct lpc_enetdata *) netif->state,
mbed_official 33:9de8bd8ca1c8 524 LPC_EMAC->TxConsumeIndex);
mbed_official 33:9de8bd8ca1c8 525 }
mbed_official 33:9de8bd8ca1c8 526
mbed_official 33:9de8bd8ca1c8 527 /** \brief Polls if an available TX descriptor is ready. Can be used to
mbed_official 33:9de8bd8ca1c8 528 * determine if the low level transmit function will block.
mbed_official 33:9de8bd8ca1c8 529 *
mbed_official 33:9de8bd8ca1c8 530 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 33:9de8bd8ca1c8 531 * \return 0 if no descriptors are read, or >0
mbed_official 33:9de8bd8ca1c8 532 */
mbed_official 33:9de8bd8ca1c8 533 s32_t lpc_tx_ready(struct netif *netif)
mbed_official 33:9de8bd8ca1c8 534 {
mbed_official 33:9de8bd8ca1c8 535 s32_t fb;
mbed_official 33:9de8bd8ca1c8 536 u32_t idx, cidx;
mbed_official 33:9de8bd8ca1c8 537
mbed_official 33:9de8bd8ca1c8 538 cidx = LPC_EMAC->TxConsumeIndex;
mbed_official 33:9de8bd8ca1c8 539 idx = LPC_EMAC->TxProduceIndex;
mbed_official 33:9de8bd8ca1c8 540
mbed_official 33:9de8bd8ca1c8 541 /* Determine number of free buffers */
mbed_official 33:9de8bd8ca1c8 542 if (idx == cidx)
mbed_official 33:9de8bd8ca1c8 543 fb = LPC_NUM_BUFF_TXDESCS;
mbed_official 33:9de8bd8ca1c8 544 else if (cidx > idx)
mbed_official 33:9de8bd8ca1c8 545 fb = (LPC_NUM_BUFF_TXDESCS - 1) -
mbed_official 33:9de8bd8ca1c8 546 ((idx + LPC_NUM_BUFF_TXDESCS) - cidx);
mbed_official 33:9de8bd8ca1c8 547 else
mbed_official 33:9de8bd8ca1c8 548 fb = (LPC_NUM_BUFF_TXDESCS - 1) - (cidx - idx);
mbed_official 33:9de8bd8ca1c8 549
mbed_official 33:9de8bd8ca1c8 550 return fb;
mbed_official 33:9de8bd8ca1c8 551 }
mbed_official 33:9de8bd8ca1c8 552
mbed_official 33:9de8bd8ca1c8 553 /** \brief Low level output of a packet. Never call this from an
mbed_official 33:9de8bd8ca1c8 554 * interrupt context, as it may block until TX descriptors
mbed_official 33:9de8bd8ca1c8 555 * become available.
mbed_official 33:9de8bd8ca1c8 556 *
mbed_official 33:9de8bd8ca1c8 557 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 33:9de8bd8ca1c8 558 * \param[in] p the MAC packet to send (e.g. IP packet including MAC addresses and type)
mbed_official 33:9de8bd8ca1c8 559 * \return ERR_OK if the packet could be sent or an err_t value if the packet couldn't be sent
mbed_official 33:9de8bd8ca1c8 560 */
mbed_official 33:9de8bd8ca1c8 561 static err_t lpc_low_level_output(struct netif *netif, struct pbuf *p)
mbed_official 33:9de8bd8ca1c8 562 {
mbed_official 33:9de8bd8ca1c8 563 struct lpc_enetdata *lpc_enetif = netif->state;
mbed_official 33:9de8bd8ca1c8 564 struct pbuf *q;
mbed_official 33:9de8bd8ca1c8 565 u8_t *dst;
mbed_official 33:9de8bd8ca1c8 566 u32_t idx, notdmasafe = 0;
mbed_official 33:9de8bd8ca1c8 567 struct pbuf *np;
mbed_official 33:9de8bd8ca1c8 568 s32_t dn;
mbed_official 33:9de8bd8ca1c8 569
mbed_official 33:9de8bd8ca1c8 570 /* Zero-copy TX buffers may be fragmented across mutliple payload
mbed_official 33:9de8bd8ca1c8 571 chains. Determine the number of descriptors needed for the
mbed_official 33:9de8bd8ca1c8 572 transfer. The pbuf chaining can be a mess! */
mbed_official 33:9de8bd8ca1c8 573 dn = (s32_t) pbuf_clen(p);
mbed_official 33:9de8bd8ca1c8 574
mbed_official 33:9de8bd8ca1c8 575 /* Test to make sure packet addresses are DMA safe. A DMA safe
mbed_official 33:9de8bd8ca1c8 576 address is once that uses external memory or periphheral RAM.
mbed_official 33:9de8bd8ca1c8 577 IRAM and FLASH are not safe! */
mbed_official 33:9de8bd8ca1c8 578 for (q = p; q != NULL; q = q->next)
mbed_official 33:9de8bd8ca1c8 579 notdmasafe += lpc_packet_addr_notsafe(q->payload);
mbed_official 33:9de8bd8ca1c8 580
mbed_official 33:9de8bd8ca1c8 581 #if LPC_TX_PBUF_BOUNCE_EN==1
mbed_official 33:9de8bd8ca1c8 582 /* If the pbuf is not DMA safe, a new bounce buffer (pbuf) will be
mbed_official 33:9de8bd8ca1c8 583 created that will be used instead. This requires an copy from the
mbed_official 33:9de8bd8ca1c8 584 non-safe DMA region to the new pbuf */
mbed_official 33:9de8bd8ca1c8 585 if (notdmasafe) {
mbed_official 33:9de8bd8ca1c8 586 /* Allocate a pbuf in DMA memory */
mbed_official 33:9de8bd8ca1c8 587 np = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
mbed_official 33:9de8bd8ca1c8 588 if (np == NULL)
mbed_official 33:9de8bd8ca1c8 589 return ERR_MEM;
mbed_official 33:9de8bd8ca1c8 590
mbed_official 33:9de8bd8ca1c8 591 /* This buffer better be contiguous! */
mbed_official 33:9de8bd8ca1c8 592 LWIP_ASSERT("lpc_low_level_output: New transmit pbuf is chained",
mbed_official 33:9de8bd8ca1c8 593 (pbuf_clen(np) == 1));
mbed_official 33:9de8bd8ca1c8 594
mbed_official 33:9de8bd8ca1c8 595 /* Copy to DMA safe pbuf */
mbed_official 33:9de8bd8ca1c8 596 dst = (u8_t *) np->payload;
mbed_official 33:9de8bd8ca1c8 597 for(q = p; q != NULL; q = q->next) {
mbed_official 33:9de8bd8ca1c8 598 /* Copy the buffer to the descriptor's buffer */
mbed_official 33:9de8bd8ca1c8 599 MEMCPY(dst, (u8_t *) q->payload, q->len);
mbed_official 33:9de8bd8ca1c8 600 dst += q->len;
mbed_official 33:9de8bd8ca1c8 601 }
mbed_official 33:9de8bd8ca1c8 602 np->len = p->tot_len;
mbed_official 33:9de8bd8ca1c8 603
mbed_official 33:9de8bd8ca1c8 604 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 33:9de8bd8ca1c8 605 ("lpc_low_level_output: Switched to DMA safe buffer, old=%p, new=%p\n",
mbed_official 33:9de8bd8ca1c8 606 q, np));
mbed_official 33:9de8bd8ca1c8 607
mbed_official 33:9de8bd8ca1c8 608 /* use the new buffer for descrptor queueing. The original pbuf will
mbed_official 33:9de8bd8ca1c8 609 be de-allocated outsuide this driver. */
mbed_official 33:9de8bd8ca1c8 610 p = np;
mbed_official 33:9de8bd8ca1c8 611 dn = 1;
mbed_official 33:9de8bd8ca1c8 612 }
mbed_official 33:9de8bd8ca1c8 613 #else
mbed_official 33:9de8bd8ca1c8 614 if (notdmasafe)
mbed_official 33:9de8bd8ca1c8 615 LWIP_ASSERT("lpc_low_level_output: Not a DMA safe pbuf",
mbed_official 33:9de8bd8ca1c8 616 (notdmasafe == 0));
mbed_official 33:9de8bd8ca1c8 617 #endif
mbed_official 33:9de8bd8ca1c8 618
mbed_official 33:9de8bd8ca1c8 619 /* Wait until enough descriptors are available for the transfer. */
mbed_official 33:9de8bd8ca1c8 620 /* THIS WILL BLOCK UNTIL THERE ARE ENOUGH DESCRIPTORS AVAILABLE */
mbed_official 33:9de8bd8ca1c8 621 while (dn > lpc_tx_ready(netif))
mbed_official 33:9de8bd8ca1c8 622 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 623 osSemaphoreWait(lpc_enetif->xTXDCountSem.id, osWaitForever);
mbed_official 33:9de8bd8ca1c8 624 #else
mbed_official 33:9de8bd8ca1c8 625 osDelay(1);
mbed_official 33:9de8bd8ca1c8 626 #endif
mbed_official 33:9de8bd8ca1c8 627
mbed_official 33:9de8bd8ca1c8 628 /* Get free TX buffer index */
mbed_official 33:9de8bd8ca1c8 629 idx = LPC_EMAC->TxProduceIndex;
mbed_official 33:9de8bd8ca1c8 630
mbed_official 33:9de8bd8ca1c8 631 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 632 /* Get exclusive access */
mbed_official 33:9de8bd8ca1c8 633 sys_mutex_lock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 634 #endif
mbed_official 33:9de8bd8ca1c8 635
mbed_official 33:9de8bd8ca1c8 636 /* Prevent LWIP from de-allocating this pbuf. The driver will
mbed_official 33:9de8bd8ca1c8 637 free it once it's been transmitted. */
mbed_official 33:9de8bd8ca1c8 638 if (!notdmasafe)
mbed_official 33:9de8bd8ca1c8 639 pbuf_ref(p);
mbed_official 33:9de8bd8ca1c8 640
mbed_official 33:9de8bd8ca1c8 641 /* Setup transfers */
mbed_official 33:9de8bd8ca1c8 642 q = p;
mbed_official 33:9de8bd8ca1c8 643 while (dn > 0) {
mbed_official 33:9de8bd8ca1c8 644 dn--;
mbed_official 33:9de8bd8ca1c8 645
mbed_official 33:9de8bd8ca1c8 646 /* Only save pointer to free on last descriptor */
mbed_official 33:9de8bd8ca1c8 647 if (dn == 0) {
mbed_official 33:9de8bd8ca1c8 648 /* Save size of packet and signal it's ready */
mbed_official 33:9de8bd8ca1c8 649 lpc_enetif->ptxd[idx].control = (q->len - 1) | EMAC_TCTRL_INT |
mbed_official 33:9de8bd8ca1c8 650 EMAC_TCTRL_LAST;
mbed_official 33:9de8bd8ca1c8 651 lpc_enetif->txb[idx] = p;
mbed_official 33:9de8bd8ca1c8 652 }
mbed_official 33:9de8bd8ca1c8 653 else {
mbed_official 33:9de8bd8ca1c8 654 /* Save size of packet, descriptor is not last */
mbed_official 33:9de8bd8ca1c8 655 lpc_enetif->ptxd[idx].control = (q->len - 1) | EMAC_TCTRL_INT;
mbed_official 33:9de8bd8ca1c8 656 lpc_enetif->txb[idx] = NULL;
mbed_official 33:9de8bd8ca1c8 657 }
mbed_official 33:9de8bd8ca1c8 658
mbed_official 33:9de8bd8ca1c8 659 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 33:9de8bd8ca1c8 660 ("lpc_low_level_output: pbuf packet(%p) sent, chain#=%d,"
mbed_official 33:9de8bd8ca1c8 661 " size = %d (index=%d)\n", q->payload, dn, q->len, idx));
mbed_official 33:9de8bd8ca1c8 662
mbed_official 33:9de8bd8ca1c8 663 lpc_enetif->ptxd[idx].packet = (u32_t) q->payload;
mbed_official 33:9de8bd8ca1c8 664
mbed_official 33:9de8bd8ca1c8 665 q = q->next;
mbed_official 33:9de8bd8ca1c8 666
mbed_official 33:9de8bd8ca1c8 667 idx++;
mbed_official 33:9de8bd8ca1c8 668 if (idx >= LPC_NUM_BUFF_TXDESCS)
mbed_official 33:9de8bd8ca1c8 669 idx = 0;
mbed_official 33:9de8bd8ca1c8 670 }
mbed_official 33:9de8bd8ca1c8 671
mbed_official 33:9de8bd8ca1c8 672 LPC_EMAC->TxProduceIndex = idx;
mbed_official 33:9de8bd8ca1c8 673
mbed_official 33:9de8bd8ca1c8 674 LINK_STATS_INC(link.xmit);
mbed_official 33:9de8bd8ca1c8 675
mbed_official 33:9de8bd8ca1c8 676 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 677 /* Restore access */
mbed_official 33:9de8bd8ca1c8 678 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 679 #endif
mbed_official 33:9de8bd8ca1c8 680
mbed_official 33:9de8bd8ca1c8 681 return ERR_OK;
mbed_official 33:9de8bd8ca1c8 682 }
mbed_official 33:9de8bd8ca1c8 683
mbed_official 33:9de8bd8ca1c8 684 /** \brief LPC EMAC interrupt handler.
mbed_official 33:9de8bd8ca1c8 685 *
mbed_official 33:9de8bd8ca1c8 686 * This function handles the transmit, receive, and error interrupt of
mbed_official 33:9de8bd8ca1c8 687 * the LPC177x_8x. This is meant to be used when NO_SYS=0.
mbed_official 33:9de8bd8ca1c8 688 */
mbed_official 33:9de8bd8ca1c8 689 void ENET_IRQHandler(void)
mbed_official 33:9de8bd8ca1c8 690 {
mbed_official 33:9de8bd8ca1c8 691 #if NO_SYS == 1
mbed_official 33:9de8bd8ca1c8 692 /* Interrupts are not used without an RTOS */
mbed_official 33:9de8bd8ca1c8 693 NVIC_DisableIRQ(ENET_IRQn);
mbed_official 33:9de8bd8ca1c8 694 #else
mbed_official 33:9de8bd8ca1c8 695 uint32_t ints;
mbed_official 33:9de8bd8ca1c8 696
mbed_official 33:9de8bd8ca1c8 697 /* Interrupts are of 2 groups - transmit or receive. Based on the
mbed_official 33:9de8bd8ca1c8 698 interrupt, kick off the receive or transmit (cleanup) task */
mbed_official 33:9de8bd8ca1c8 699
mbed_official 33:9de8bd8ca1c8 700 /* Get pending interrupts */
mbed_official 33:9de8bd8ca1c8 701 ints = LPC_EMAC->IntStatus;
mbed_official 33:9de8bd8ca1c8 702
mbed_official 33:9de8bd8ca1c8 703 if (ints & RXINTGROUP) {
mbed_official 33:9de8bd8ca1c8 704 /* RX group interrupt(s): Give signal to wakeup RX receive task.*/
mbed_official 33:9de8bd8ca1c8 705 osSignalSet(lpc_enetdata.RxThread->id, RX_SIGNAL);
mbed_official 33:9de8bd8ca1c8 706 }
mbed_official 33:9de8bd8ca1c8 707
mbed_official 33:9de8bd8ca1c8 708 if (ints & TXINTGROUP) {
mbed_official 33:9de8bd8ca1c8 709 /* TX group interrupt(s): Give semaphore to wakeup TX cleanup task. */
mbed_official 33:9de8bd8ca1c8 710 sys_sem_signal(&lpc_enetdata.TxCleanSem);
mbed_official 33:9de8bd8ca1c8 711 }
mbed_official 33:9de8bd8ca1c8 712
mbed_official 33:9de8bd8ca1c8 713 /* Clear pending interrupts */
mbed_official 33:9de8bd8ca1c8 714 LPC_EMAC->IntClear = ints;
mbed_official 33:9de8bd8ca1c8 715 #endif
mbed_official 33:9de8bd8ca1c8 716 }
mbed_official 33:9de8bd8ca1c8 717
mbed_official 33:9de8bd8ca1c8 718 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 719 /** \brief Packet reception task
mbed_official 33:9de8bd8ca1c8 720 *
mbed_official 33:9de8bd8ca1c8 721 * This task is called when a packet is received. It will
mbed_official 33:9de8bd8ca1c8 722 * pass the packet to the LWIP core.
mbed_official 33:9de8bd8ca1c8 723 *
mbed_official 33:9de8bd8ca1c8 724 * \param[in] pvParameters Not used yet
mbed_official 33:9de8bd8ca1c8 725 */
mbed_official 33:9de8bd8ca1c8 726 static void packet_rx(void* pvParameters) {
mbed_official 33:9de8bd8ca1c8 727 struct lpc_enetdata *lpc_enetif = pvParameters;
mbed_official 33:9de8bd8ca1c8 728
mbed_official 33:9de8bd8ca1c8 729 while (1) {
mbed_official 33:9de8bd8ca1c8 730 /* Wait for receive task to wakeup */
mbed_official 33:9de8bd8ca1c8 731 osSignalWait(RX_SIGNAL, osWaitForever);
mbed_official 33:9de8bd8ca1c8 732
mbed_official 33:9de8bd8ca1c8 733 /* Process packets until all empty */
mbed_official 33:9de8bd8ca1c8 734 while (LPC_EMAC->RxConsumeIndex != LPC_EMAC->RxProduceIndex)
mbed_official 33:9de8bd8ca1c8 735 lpc_enetif_input(lpc_enetif->netif);
mbed_official 33:9de8bd8ca1c8 736 }
mbed_official 33:9de8bd8ca1c8 737 }
mbed_official 33:9de8bd8ca1c8 738
mbed_official 33:9de8bd8ca1c8 739 /** \brief Transmit cleanup task
mbed_official 33:9de8bd8ca1c8 740 *
mbed_official 33:9de8bd8ca1c8 741 * This task is called when a transmit interrupt occurs and
mbed_official 33:9de8bd8ca1c8 742 * reclaims the pbuf and descriptor used for the packet once
mbed_official 33:9de8bd8ca1c8 743 * the packet has been transferred.
mbed_official 33:9de8bd8ca1c8 744 *
mbed_official 33:9de8bd8ca1c8 745 * \param[in] pvParameters Not used yet
mbed_official 33:9de8bd8ca1c8 746 */
mbed_official 33:9de8bd8ca1c8 747 static void packet_tx(void* pvParameters) {
mbed_official 33:9de8bd8ca1c8 748 struct lpc_enetdata *lpc_enetif = pvParameters;
mbed_official 33:9de8bd8ca1c8 749 s32_t idx;
mbed_official 33:9de8bd8ca1c8 750
mbed_official 33:9de8bd8ca1c8 751 while (1) {
mbed_official 33:9de8bd8ca1c8 752 /* Wait for transmit cleanup task to wakeup */
mbed_official 33:9de8bd8ca1c8 753 sys_arch_sem_wait(&lpc_enetif->TxCleanSem, 0);
mbed_official 33:9de8bd8ca1c8 754
mbed_official 33:9de8bd8ca1c8 755 /* Error handling for TX underruns. This should never happen unless
mbed_official 33:9de8bd8ca1c8 756 something is holding the bus or the clocks are going too slow. It
mbed_official 33:9de8bd8ca1c8 757 can probably be safely removed. */
mbed_official 33:9de8bd8ca1c8 758 if (LPC_EMAC->IntStatus & EMAC_INT_TX_UNDERRUN) {
mbed_official 33:9de8bd8ca1c8 759 LINK_STATS_INC(link.err);
mbed_official 33:9de8bd8ca1c8 760 LINK_STATS_INC(link.drop);
mbed_official 33:9de8bd8ca1c8 761
mbed_official 33:9de8bd8ca1c8 762 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 763 /* Get exclusive access */
mbed_official 33:9de8bd8ca1c8 764 sys_mutex_lock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 765 #endif
mbed_official 33:9de8bd8ca1c8 766 /* Reset the TX side */
mbed_official 33:9de8bd8ca1c8 767 LPC_EMAC->MAC1 |= EMAC_MAC1_RES_TX;
mbed_official 33:9de8bd8ca1c8 768 LPC_EMAC->IntClear = EMAC_INT_TX_UNDERRUN;
mbed_official 33:9de8bd8ca1c8 769
mbed_official 33:9de8bd8ca1c8 770 /* De-allocate all queued TX pbufs */
mbed_official 33:9de8bd8ca1c8 771 for (idx = 0; idx < LPC_NUM_BUFF_TXDESCS; idx++) {
mbed_official 33:9de8bd8ca1c8 772 if (lpc_enetif->txb[idx] != NULL) {
mbed_official 33:9de8bd8ca1c8 773 pbuf_free(lpc_enetif->txb[idx]);
mbed_official 33:9de8bd8ca1c8 774 lpc_enetif->txb[idx] = NULL;
mbed_official 33:9de8bd8ca1c8 775 }
mbed_official 33:9de8bd8ca1c8 776 }
mbed_official 33:9de8bd8ca1c8 777
mbed_official 33:9de8bd8ca1c8 778 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 779 /* Restore access */
mbed_official 33:9de8bd8ca1c8 780 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 33:9de8bd8ca1c8 781 #endif
mbed_official 33:9de8bd8ca1c8 782 /* Start TX side again */
mbed_official 33:9de8bd8ca1c8 783 lpc_tx_setup(lpc_enetif);
mbed_official 33:9de8bd8ca1c8 784 } else {
mbed_official 33:9de8bd8ca1c8 785 /* Free TX buffers that are done sending */
mbed_official 33:9de8bd8ca1c8 786 lpc_tx_reclaim(lpc_enetdata.netif);
mbed_official 33:9de8bd8ca1c8 787 }
mbed_official 33:9de8bd8ca1c8 788 }
mbed_official 33:9de8bd8ca1c8 789 }
mbed_official 33:9de8bd8ca1c8 790 #endif
mbed_official 33:9de8bd8ca1c8 791
mbed_official 33:9de8bd8ca1c8 792 /** \brief Low level init of the MAC and PHY.
mbed_official 33:9de8bd8ca1c8 793 *
mbed_official 33:9de8bd8ca1c8 794 * \param[in] netif Pointer to LWIP netif structure
mbed_official 33:9de8bd8ca1c8 795 */
mbed_official 33:9de8bd8ca1c8 796 static err_t low_level_init(struct netif *netif)
mbed_official 33:9de8bd8ca1c8 797 {
mbed_official 33:9de8bd8ca1c8 798 struct lpc_enetdata *lpc_enetif = netif->state;
mbed_official 33:9de8bd8ca1c8 799 err_t err = ERR_OK;
mbed_official 33:9de8bd8ca1c8 800
mbed_official 33:9de8bd8ca1c8 801 /* Enable MII clocking */
mbed_official 33:9de8bd8ca1c8 802 LPC_SC->PCONP |= CLKPWR_PCONP_PCENET;
mbed_official 33:9de8bd8ca1c8 803
mbed_official 33:9de8bd8ca1c8 804 #if defined(TARGET_LPC1768)
mbed_official 33:9de8bd8ca1c8 805 LPC_PINCON->PINSEL2 = 0x50150105; /* Enable P1 Ethernet Pins. */
mbed_official 33:9de8bd8ca1c8 806 LPC_PINCON->PINSEL3 = (LPC_PINCON->PINSEL3 & ~0x0000000F) | 0x00000005;
mbed_official 33:9de8bd8ca1c8 807 #elif defined(TARGET_LPC4088) || defined(TARGET_LPC4088_DM)
mbed_official 33:9de8bd8ca1c8 808 LPC_IOCON->P1_0 &= ~0x07; /* ENET I/O config */
mbed_official 33:9de8bd8ca1c8 809 LPC_IOCON->P1_0 |= 0x01; /* ENET_TXD0 */
mbed_official 33:9de8bd8ca1c8 810 LPC_IOCON->P1_1 &= ~0x07;
mbed_official 33:9de8bd8ca1c8 811 LPC_IOCON->P1_1 |= 0x01; /* ENET_TXD1 */
mbed_official 33:9de8bd8ca1c8 812 LPC_IOCON->P1_4 &= ~0x07;
mbed_official 33:9de8bd8ca1c8 813 LPC_IOCON->P1_4 |= 0x01; /* ENET_TXEN */
mbed_official 33:9de8bd8ca1c8 814 LPC_IOCON->P1_8 &= ~0x07;
mbed_official 33:9de8bd8ca1c8 815 LPC_IOCON->P1_8 |= 0x01; /* ENET_CRS */
mbed_official 33:9de8bd8ca1c8 816 LPC_IOCON->P1_9 &= ~0x07;
mbed_official 33:9de8bd8ca1c8 817 LPC_IOCON->P1_9 |= 0x01; /* ENET_RXD0 */
mbed_official 33:9de8bd8ca1c8 818 LPC_IOCON->P1_10 &= ~0x07;
mbed_official 33:9de8bd8ca1c8 819 LPC_IOCON->P1_10 |= 0x01; /* ENET_RXD1 */
mbed_official 33:9de8bd8ca1c8 820 LPC_IOCON->P1_14 &= ~0x07;
mbed_official 33:9de8bd8ca1c8 821 LPC_IOCON->P1_14 |= 0x01; /* ENET_RX_ER */
mbed_official 33:9de8bd8ca1c8 822 LPC_IOCON->P1_15 &= ~0x07;
mbed_official 33:9de8bd8ca1c8 823 LPC_IOCON->P1_15 |= 0x01; /* ENET_REF_CLK */
mbed_official 33:9de8bd8ca1c8 824 LPC_IOCON->P1_16 &= ~0x07; /* ENET/PHY I/O config */
mbed_official 33:9de8bd8ca1c8 825 LPC_IOCON->P1_16 |= 0x01; /* ENET_MDC */
mbed_official 33:9de8bd8ca1c8 826 LPC_IOCON->P1_17 &= ~0x07;
mbed_official 33:9de8bd8ca1c8 827 LPC_IOCON->P1_17 |= 0x01; /* ENET_MDIO */
mbed_official 33:9de8bd8ca1c8 828 #endif
mbed_official 33:9de8bd8ca1c8 829
mbed_official 33:9de8bd8ca1c8 830 /* Reset all MAC logic */
mbed_official 33:9de8bd8ca1c8 831 LPC_EMAC->MAC1 = EMAC_MAC1_RES_TX | EMAC_MAC1_RES_MCS_TX |
mbed_official 33:9de8bd8ca1c8 832 EMAC_MAC1_RES_RX | EMAC_MAC1_RES_MCS_RX | EMAC_MAC1_SIM_RES |
mbed_official 33:9de8bd8ca1c8 833 EMAC_MAC1_SOFT_RES;
mbed_official 33:9de8bd8ca1c8 834 LPC_EMAC->Command = EMAC_CR_REG_RES | EMAC_CR_TX_RES | EMAC_CR_RX_RES |
mbed_official 33:9de8bd8ca1c8 835 EMAC_CR_PASS_RUNT_FRM;
mbed_official 33:9de8bd8ca1c8 836 osDelay(10);
mbed_official 33:9de8bd8ca1c8 837
mbed_official 33:9de8bd8ca1c8 838 /* Initial MAC initialization */
mbed_official 33:9de8bd8ca1c8 839 LPC_EMAC->MAC1 = EMAC_MAC1_PASS_ALL;
mbed_official 33:9de8bd8ca1c8 840 LPC_EMAC->MAC2 = EMAC_MAC2_CRC_EN | EMAC_MAC2_PAD_EN |
mbed_official 33:9de8bd8ca1c8 841 EMAC_MAC2_VLAN_PAD_EN;
mbed_official 33:9de8bd8ca1c8 842 LPC_EMAC->MAXF = EMAC_ETH_MAX_FLEN;
mbed_official 33:9de8bd8ca1c8 843
mbed_official 33:9de8bd8ca1c8 844 /* Set RMII management clock rate to lowest speed */
mbed_official 33:9de8bd8ca1c8 845 LPC_EMAC->MCFG = EMAC_MCFG_CLK_SEL(11) | EMAC_MCFG_RES_MII;
mbed_official 33:9de8bd8ca1c8 846 LPC_EMAC->MCFG &= ~EMAC_MCFG_RES_MII;
mbed_official 33:9de8bd8ca1c8 847
mbed_official 33:9de8bd8ca1c8 848 /* Maximum number of retries, 0x37 collision window, gap */
mbed_official 33:9de8bd8ca1c8 849 LPC_EMAC->CLRT = EMAC_CLRT_DEF;
mbed_official 33:9de8bd8ca1c8 850 LPC_EMAC->IPGR = EMAC_IPGR_P1_DEF | EMAC_IPGR_P2_DEF;
mbed_official 33:9de8bd8ca1c8 851
mbed_official 33:9de8bd8ca1c8 852 #if LPC_EMAC_RMII
mbed_official 33:9de8bd8ca1c8 853 /* RMII setup */
mbed_official 33:9de8bd8ca1c8 854 LPC_EMAC->Command = EMAC_CR_PASS_RUNT_FRM | EMAC_CR_RMII;
mbed_official 33:9de8bd8ca1c8 855 #else
mbed_official 33:9de8bd8ca1c8 856 /* MII setup */
mbed_official 33:9de8bd8ca1c8 857 LPC_EMAC->CR = EMAC_CR_PASS_RUNT_FRM;
mbed_official 33:9de8bd8ca1c8 858 #endif
mbed_official 33:9de8bd8ca1c8 859
mbed_official 33:9de8bd8ca1c8 860 /* Initialize the PHY and reset */
mbed_official 33:9de8bd8ca1c8 861 err = lpc_phy_init(netif, LPC_EMAC_RMII);
mbed_official 33:9de8bd8ca1c8 862 if (err != ERR_OK)
mbed_official 33:9de8bd8ca1c8 863 return err;
mbed_official 33:9de8bd8ca1c8 864
mbed_official 33:9de8bd8ca1c8 865 /* Save station address */
mbed_official 33:9de8bd8ca1c8 866 LPC_EMAC->SA2 = (u32_t) netif->hwaddr[0] |
mbed_official 33:9de8bd8ca1c8 867 (((u32_t) netif->hwaddr[1]) << 8);
mbed_official 33:9de8bd8ca1c8 868 LPC_EMAC->SA1 = (u32_t) netif->hwaddr[2] |
mbed_official 33:9de8bd8ca1c8 869 (((u32_t) netif->hwaddr[3]) << 8);
mbed_official 33:9de8bd8ca1c8 870 LPC_EMAC->SA0 = (u32_t) netif->hwaddr[4] |
mbed_official 33:9de8bd8ca1c8 871 (((u32_t) netif->hwaddr[5]) << 8);
mbed_official 33:9de8bd8ca1c8 872
mbed_official 33:9de8bd8ca1c8 873 /* Setup transmit and receive descriptors */
mbed_official 33:9de8bd8ca1c8 874 if (lpc_tx_setup(lpc_enetif) != ERR_OK)
mbed_official 33:9de8bd8ca1c8 875 return ERR_BUF;
mbed_official 33:9de8bd8ca1c8 876 if (lpc_rx_setup(lpc_enetif) != ERR_OK)
mbed_official 33:9de8bd8ca1c8 877 return ERR_BUF;
mbed_official 33:9de8bd8ca1c8 878
mbed_official 33:9de8bd8ca1c8 879 /* Enable packet reception */
mbed_official 33:9de8bd8ca1c8 880 #if IP_SOF_BROADCAST_RECV
mbed_official 33:9de8bd8ca1c8 881 LPC_EMAC->RxFilterCtrl = EMAC_RFC_PERFECT_EN | EMAC_RFC_BCAST_EN | EMAC_RFC_MCAST_EN;
mbed_official 33:9de8bd8ca1c8 882 #else
mbed_official 33:9de8bd8ca1c8 883 LPC_EMAC->RxFilterCtrl = EMAC_RFC_PERFECT_EN;
mbed_official 33:9de8bd8ca1c8 884 #endif
mbed_official 33:9de8bd8ca1c8 885
mbed_official 33:9de8bd8ca1c8 886 /* Clear and enable rx/tx interrupts */
mbed_official 33:9de8bd8ca1c8 887 LPC_EMAC->IntClear = 0xFFFF;
mbed_official 33:9de8bd8ca1c8 888 LPC_EMAC->IntEnable = RXINTGROUP | TXINTGROUP;
mbed_official 33:9de8bd8ca1c8 889
mbed_official 33:9de8bd8ca1c8 890 /* Enable RX and TX */
mbed_official 33:9de8bd8ca1c8 891 LPC_EMAC->Command |= EMAC_CR_RX_EN | EMAC_CR_TX_EN;
mbed_official 33:9de8bd8ca1c8 892 LPC_EMAC->MAC1 |= EMAC_MAC1_REC_EN;
mbed_official 33:9de8bd8ca1c8 893
mbed_official 33:9de8bd8ca1c8 894 return err;
mbed_official 33:9de8bd8ca1c8 895 }
mbed_official 33:9de8bd8ca1c8 896
mbed_official 33:9de8bd8ca1c8 897 /* This function provides a method for the PHY to setup the EMAC
mbed_official 33:9de8bd8ca1c8 898 for the PHY negotiated duplex mode */
mbed_official 33:9de8bd8ca1c8 899 void lpc_emac_set_duplex(int full_duplex)
mbed_official 33:9de8bd8ca1c8 900 {
mbed_official 33:9de8bd8ca1c8 901 if (full_duplex) {
mbed_official 33:9de8bd8ca1c8 902 LPC_EMAC->MAC2 |= EMAC_MAC2_FULL_DUP;
mbed_official 33:9de8bd8ca1c8 903 LPC_EMAC->Command |= EMAC_CR_FULL_DUP;
mbed_official 33:9de8bd8ca1c8 904 LPC_EMAC->IPGT = EMAC_IPGT_FULL_DUP;
mbed_official 33:9de8bd8ca1c8 905 } else {
mbed_official 33:9de8bd8ca1c8 906 LPC_EMAC->MAC2 &= ~EMAC_MAC2_FULL_DUP;
mbed_official 33:9de8bd8ca1c8 907 LPC_EMAC->Command &= ~EMAC_CR_FULL_DUP;
mbed_official 33:9de8bd8ca1c8 908 LPC_EMAC->IPGT = EMAC_IPGT_HALF_DUP;
mbed_official 33:9de8bd8ca1c8 909 }
mbed_official 33:9de8bd8ca1c8 910 }
mbed_official 33:9de8bd8ca1c8 911
mbed_official 33:9de8bd8ca1c8 912 /* This function provides a method for the PHY to setup the EMAC
mbed_official 33:9de8bd8ca1c8 913 for the PHY negotiated bit rate */
mbed_official 33:9de8bd8ca1c8 914 void lpc_emac_set_speed(int mbs_100)
mbed_official 33:9de8bd8ca1c8 915 {
mbed_official 33:9de8bd8ca1c8 916 if (mbs_100)
mbed_official 33:9de8bd8ca1c8 917 LPC_EMAC->SUPP = EMAC_SUPP_SPEED;
mbed_official 33:9de8bd8ca1c8 918 else
mbed_official 33:9de8bd8ca1c8 919 LPC_EMAC->SUPP = 0;
mbed_official 33:9de8bd8ca1c8 920 }
mbed_official 33:9de8bd8ca1c8 921
mbed_official 33:9de8bd8ca1c8 922 /**
mbed_official 33:9de8bd8ca1c8 923 * This function is the ethernet packet send function. It calls
mbed_official 33:9de8bd8ca1c8 924 * etharp_output after checking link status.
mbed_official 33:9de8bd8ca1c8 925 *
mbed_official 33:9de8bd8ca1c8 926 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 33:9de8bd8ca1c8 927 * \param[in] q Pointer to pbug to send
mbed_official 33:9de8bd8ca1c8 928 * \param[in] ipaddr IP address
mbed_official 33:9de8bd8ca1c8 929 * \return ERR_OK or error code
mbed_official 33:9de8bd8ca1c8 930 */
mbed_official 33:9de8bd8ca1c8 931 err_t lpc_etharp_output(struct netif *netif, struct pbuf *q,
mbed_official 33:9de8bd8ca1c8 932 ip_addr_t *ipaddr)
mbed_official 33:9de8bd8ca1c8 933 {
mbed_official 33:9de8bd8ca1c8 934 /* Only send packet is link is up */
mbed_official 33:9de8bd8ca1c8 935 if (netif->flags & NETIF_FLAG_LINK_UP)
mbed_official 33:9de8bd8ca1c8 936 return etharp_output(netif, q, ipaddr);
mbed_official 33:9de8bd8ca1c8 937
mbed_official 33:9de8bd8ca1c8 938 return ERR_CONN;
mbed_official 33:9de8bd8ca1c8 939 }
mbed_official 33:9de8bd8ca1c8 940
mbed_official 33:9de8bd8ca1c8 941 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 942 /* periodic PHY status update */
mbed_official 33:9de8bd8ca1c8 943 void phy_update(void const *nif) {
mbed_official 33:9de8bd8ca1c8 944 lpc_phy_sts_sm((struct netif*)nif);
mbed_official 33:9de8bd8ca1c8 945 }
mbed_official 33:9de8bd8ca1c8 946 osTimerDef(phy_update, phy_update);
mbed_official 33:9de8bd8ca1c8 947 #endif
mbed_official 33:9de8bd8ca1c8 948
mbed_official 33:9de8bd8ca1c8 949 /**
mbed_official 33:9de8bd8ca1c8 950 * Should be called at the beginning of the program to set up the
mbed_official 33:9de8bd8ca1c8 951 * network interface.
mbed_official 33:9de8bd8ca1c8 952 *
mbed_official 33:9de8bd8ca1c8 953 * This function should be passed as a parameter to netif_add().
mbed_official 33:9de8bd8ca1c8 954 *
mbed_official 33:9de8bd8ca1c8 955 * @param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 33:9de8bd8ca1c8 956 * @return ERR_OK if the loopif is initialized
mbed_official 33:9de8bd8ca1c8 957 * ERR_MEM if private data couldn't be allocated
mbed_official 33:9de8bd8ca1c8 958 * any other err_t on error
mbed_official 33:9de8bd8ca1c8 959 */
mbed_official 33:9de8bd8ca1c8 960 err_t eth_arch_enetif_init(struct netif *netif)
mbed_official 33:9de8bd8ca1c8 961 {
mbed_official 33:9de8bd8ca1c8 962 err_t err;
mbed_official 33:9de8bd8ca1c8 963
mbed_official 33:9de8bd8ca1c8 964 LWIP_ASSERT("netif != NULL", (netif != NULL));
mbed_official 33:9de8bd8ca1c8 965
mbed_official 33:9de8bd8ca1c8 966 lpc_enetdata.netif = netif;
mbed_official 33:9de8bd8ca1c8 967
mbed_official 33:9de8bd8ca1c8 968 /* set MAC hardware address */
mbed_official 33:9de8bd8ca1c8 969 #if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
mbed_official 33:9de8bd8ca1c8 970 netif->hwaddr[0] = MBED_MAC_ADDR_0;
mbed_official 33:9de8bd8ca1c8 971 netif->hwaddr[1] = MBED_MAC_ADDR_1;
mbed_official 33:9de8bd8ca1c8 972 netif->hwaddr[2] = MBED_MAC_ADDR_2;
mbed_official 33:9de8bd8ca1c8 973 netif->hwaddr[3] = MBED_MAC_ADDR_3;
mbed_official 33:9de8bd8ca1c8 974 netif->hwaddr[4] = MBED_MAC_ADDR_4;
mbed_official 33:9de8bd8ca1c8 975 netif->hwaddr[5] = MBED_MAC_ADDR_5;
mbed_official 33:9de8bd8ca1c8 976 #else
mbed_official 33:9de8bd8ca1c8 977 mbed_mac_address((char *)netif->hwaddr);
mbed_official 33:9de8bd8ca1c8 978 #endif
mbed_official 33:9de8bd8ca1c8 979 netif->hwaddr_len = ETHARP_HWADDR_LEN;
mbed_official 33:9de8bd8ca1c8 980
mbed_official 33:9de8bd8ca1c8 981 /* maximum transfer unit */
mbed_official 33:9de8bd8ca1c8 982 netif->mtu = 1500;
mbed_official 33:9de8bd8ca1c8 983
mbed_official 33:9de8bd8ca1c8 984 /* device capabilities */
mbed_official 33:9de8bd8ca1c8 985 netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET | NETIF_FLAG_IGMP;
mbed_official 33:9de8bd8ca1c8 986
mbed_official 33:9de8bd8ca1c8 987 /* Initialize the hardware */
mbed_official 33:9de8bd8ca1c8 988 netif->state = &lpc_enetdata;
mbed_official 33:9de8bd8ca1c8 989 err = low_level_init(netif);
mbed_official 33:9de8bd8ca1c8 990 if (err != ERR_OK)
mbed_official 33:9de8bd8ca1c8 991 return err;
mbed_official 33:9de8bd8ca1c8 992
mbed_official 33:9de8bd8ca1c8 993 #if LWIP_NETIF_HOSTNAME
mbed_official 33:9de8bd8ca1c8 994 /* Initialize interface hostname */
mbed_official 33:9de8bd8ca1c8 995 netif->hostname = "lwiplpc";
mbed_official 33:9de8bd8ca1c8 996 #endif /* LWIP_NETIF_HOSTNAME */
mbed_official 33:9de8bd8ca1c8 997
mbed_official 33:9de8bd8ca1c8 998 netif->name[0] = 'e';
mbed_official 33:9de8bd8ca1c8 999 netif->name[1] = 'n';
mbed_official 33:9de8bd8ca1c8 1000
mbed_official 33:9de8bd8ca1c8 1001 netif->output = lpc_etharp_output;
mbed_official 33:9de8bd8ca1c8 1002 netif->linkoutput = lpc_low_level_output;
mbed_official 33:9de8bd8ca1c8 1003
mbed_official 33:9de8bd8ca1c8 1004 /* CMSIS-RTOS, start tasks */
mbed_official 33:9de8bd8ca1c8 1005 #if NO_SYS == 0
mbed_official 33:9de8bd8ca1c8 1006 #ifdef CMSIS_OS_RTX
mbed_official 33:9de8bd8ca1c8 1007 memset(lpc_enetdata.xTXDCountSem.data, 0, sizeof(lpc_enetdata.xTXDCountSem.data));
mbed_official 33:9de8bd8ca1c8 1008 lpc_enetdata.xTXDCountSem.def.semaphore = lpc_enetdata.xTXDCountSem.data;
mbed_official 33:9de8bd8ca1c8 1009 #endif
mbed_official 33:9de8bd8ca1c8 1010 lpc_enetdata.xTXDCountSem.id = osSemaphoreCreate(&lpc_enetdata.xTXDCountSem.def, LPC_NUM_BUFF_TXDESCS);
mbed_official 33:9de8bd8ca1c8 1011 LWIP_ASSERT("xTXDCountSem creation error", (lpc_enetdata.xTXDCountSem.id != NULL));
mbed_official 33:9de8bd8ca1c8 1012
mbed_official 33:9de8bd8ca1c8 1013 err = sys_mutex_new(&lpc_enetdata.TXLockMutex);
mbed_official 33:9de8bd8ca1c8 1014 LWIP_ASSERT("TXLockMutex creation error", (err == ERR_OK));
mbed_official 33:9de8bd8ca1c8 1015
mbed_official 33:9de8bd8ca1c8 1016 /* Packet receive task */
mbed_official 33:9de8bd8ca1c8 1017 lpc_enetdata.RxThread = sys_thread_new("receive_thread", packet_rx, netif->state, DEFAULT_THREAD_STACKSIZE, RX_PRIORITY);
mbed_official 33:9de8bd8ca1c8 1018 LWIP_ASSERT("RxThread creation error", (lpc_enetdata.RxThread));
mbed_official 33:9de8bd8ca1c8 1019
mbed_official 33:9de8bd8ca1c8 1020 /* Transmit cleanup task */
mbed_official 33:9de8bd8ca1c8 1021 err = sys_sem_new(&lpc_enetdata.TxCleanSem, 0);
mbed_official 33:9de8bd8ca1c8 1022 LWIP_ASSERT("TxCleanSem creation error", (err == ERR_OK));
mbed_official 33:9de8bd8ca1c8 1023 sys_thread_new("txclean_thread", packet_tx, netif->state, DEFAULT_THREAD_STACKSIZE, TX_PRIORITY);
mbed_official 33:9de8bd8ca1c8 1024
mbed_official 33:9de8bd8ca1c8 1025 /* periodic PHY status update */
mbed_official 33:9de8bd8ca1c8 1026 osTimerId phy_timer = osTimerCreate(osTimer(phy_update), osTimerPeriodic, (void *)netif);
mbed_official 33:9de8bd8ca1c8 1027 osTimerStart(phy_timer, 250);
mbed_official 33:9de8bd8ca1c8 1028 #endif
mbed_official 33:9de8bd8ca1c8 1029
mbed_official 33:9de8bd8ca1c8 1030 return ERR_OK;
mbed_official 33:9de8bd8ca1c8 1031 }
mbed_official 33:9de8bd8ca1c8 1032
mbed_official 33:9de8bd8ca1c8 1033 void eth_arch_enable_interrupts(void) {
mbed_official 33:9de8bd8ca1c8 1034 NVIC_SetPriority(ENET_IRQn, ((0x01 << 3) | 0x01));
mbed_official 33:9de8bd8ca1c8 1035 NVIC_EnableIRQ(ENET_IRQn);
mbed_official 33:9de8bd8ca1c8 1036 }
mbed_official 33:9de8bd8ca1c8 1037
mbed_official 33:9de8bd8ca1c8 1038 void eth_arch_disable_interrupts(void) {
mbed_official 33:9de8bd8ca1c8 1039 NVIC_DisableIRQ(ENET_IRQn);
mbed_official 33:9de8bd8ca1c8 1040 }
mbed_official 33:9de8bd8ca1c8 1041
mbed_official 33:9de8bd8ca1c8 1042 /**
mbed_official 33:9de8bd8ca1c8 1043 * @}
mbed_official 33:9de8bd8ca1c8 1044 */
mbed_official 33:9de8bd8ca1c8 1045
mbed_official 33:9de8bd8ca1c8 1046 /* --------------------------------- End Of File ------------------------------ */