Adam Green / EthernetInterface

Deprecated fork of old network stack source from github. Please use official library instead: https://mbed.org/users/mbed_official/code/EthernetInterface/

lwip-eth/arch/lpc17_emac.c@1:eadc868c2acf, 2013-10-26 (annotated)

Committer:
AdamGreen
Date:
Sat Oct 26 08:51:36 2013 +0000
Revision:
1:eadc868c2acf
Parent:
0:3b00827bb0b7 
Fix TCP checksum bug and stranded large TCP segments.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AdamGreen 0:3b00827bb0b7 1 /**********************************************************************
AdamGreen 0:3b00827bb0b7 2 * $Id$ lpc17_emac.c 2011-11-20
AdamGreen 0:3b00827bb0b7 3 *//**
AdamGreen 0:3b00827bb0b7 4 * @file lpc17_emac.c
AdamGreen 0:3b00827bb0b7 5 * @brief LPC17 ethernet driver for LWIP
AdamGreen 0:3b00827bb0b7 6 * @version 1.0
AdamGreen 0:3b00827bb0b7 7 * @date 20. Nov. 2011
AdamGreen 0:3b00827bb0b7 8 * @author NXP MCU SW Application Team
AdamGreen 0:3b00827bb0b7 9 *
AdamGreen 0:3b00827bb0b7 10 * Copyright(C) 2011, NXP Semiconductor
AdamGreen 0:3b00827bb0b7 11 * All rights reserved.
AdamGreen 0:3b00827bb0b7 12 *
AdamGreen 0:3b00827bb0b7 13 ***********************************************************************
AdamGreen 0:3b00827bb0b7 14 * Software that is described herein is for illustrative purposes only
AdamGreen 0:3b00827bb0b7 15 * which provides customers with programming information regarding the
AdamGreen 0:3b00827bb0b7 16 * products. This software is supplied "AS IS" without any warranties.
AdamGreen 0:3b00827bb0b7 17 * NXP Semiconductors assumes no responsibility or liability for the
AdamGreen 0:3b00827bb0b7 18 * use of the software, conveys no license or title under any patent,
AdamGreen 0:3b00827bb0b7 19 * copyright, or mask work right to the product. NXP Semiconductors
AdamGreen 0:3b00827bb0b7 20 * reserves the right to make changes in the software without
AdamGreen 0:3b00827bb0b7 21 * notification. NXP Semiconductors also make no representation or
AdamGreen 0:3b00827bb0b7 22 * warranty that such application will be suitable for the specified
AdamGreen 0:3b00827bb0b7 23 * use without further testing or modification.
AdamGreen 0:3b00827bb0b7 24 **********************************************************************/
AdamGreen 0:3b00827bb0b7 25
AdamGreen 0:3b00827bb0b7 26 #include "lwip/opt.h"
AdamGreen 0:3b00827bb0b7 27 #include "lwip/sys.h"
AdamGreen 0:3b00827bb0b7 28 #include "lwip/def.h"
AdamGreen 0:3b00827bb0b7 29 #include "lwip/mem.h"
AdamGreen 0:3b00827bb0b7 30 #include "lwip/pbuf.h"
AdamGreen 0:3b00827bb0b7 31 #include "lwip/stats.h"
AdamGreen 0:3b00827bb0b7 32 #include "lwip/snmp.h"
AdamGreen 0:3b00827bb0b7 33 #include "netif/etharp.h"
AdamGreen 0:3b00827bb0b7 34 #include "netif/ppp_oe.h"
AdamGreen 0:3b00827bb0b7 35
AdamGreen 0:3b00827bb0b7 36 #include "lpc17xx_emac.h"
AdamGreen 0:3b00827bb0b7 37 #include "lpc17_emac.h"
AdamGreen 0:3b00827bb0b7 38 #include "lpc_emac_config.h"
AdamGreen 0:3b00827bb0b7 39 #include "lpc_phy.h"
AdamGreen 0:3b00827bb0b7 40 #include "sys_arch.h"
AdamGreen 0:3b00827bb0b7 41
AdamGreen 0:3b00827bb0b7 42 #include "mbed_interface.h"
AdamGreen 0:3b00827bb0b7 43 #include <string.h>
AdamGreen 0:3b00827bb0b7 44
AdamGreen 0:3b00827bb0b7 45 #ifndef LPC_EMAC_RMII
AdamGreen 0:3b00827bb0b7 46 #error LPC_EMAC_RMII is not defined!
AdamGreen 0:3b00827bb0b7 47 #endif
AdamGreen 0:3b00827bb0b7 48
AdamGreen 0:3b00827bb0b7 49 #if LPC_NUM_BUFF_TXDESCS < 2
AdamGreen 0:3b00827bb0b7 50 #error LPC_NUM_BUFF_TXDESCS must be at least 2
AdamGreen 0:3b00827bb0b7 51 #endif
AdamGreen 0:3b00827bb0b7 52
AdamGreen 0:3b00827bb0b7 53 #if LPC_NUM_BUFF_RXDESCS < 3
AdamGreen 0:3b00827bb0b7 54 #error LPC_NUM_BUFF_RXDESCS must be at least 3
AdamGreen 0:3b00827bb0b7 55 #endif
AdamGreen 0:3b00827bb0b7 56
AdamGreen 0:3b00827bb0b7 57 /** @defgroup lwip17xx_emac_DRIVER lpc17 EMAC driver for LWIP
AdamGreen 0:3b00827bb0b7 58 * @ingroup lwip_emac
AdamGreen 0:3b00827bb0b7 59 *
AdamGreen 0:3b00827bb0b7 60 * @{
AdamGreen 0:3b00827bb0b7 61 */
AdamGreen 0:3b00827bb0b7 62
AdamGreen 0:3b00827bb0b7 63 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 64 /** \brief Driver transmit and receive thread priorities
AdamGreen 0:3b00827bb0b7 65 *
AdamGreen 0:3b00827bb0b7 66 * Thread priorities for receive thread and TX cleanup thread. Alter
AdamGreen 0:3b00827bb0b7 67 * to prioritize receive or transmit bandwidth. In a heavily loaded
AdamGreen 0:3b00827bb0b7 68 * system or with LEIP_DEBUG enabled, the priorities might be better
AdamGreen 0:3b00827bb0b7 69 * the same. */
AdamGreen 0:3b00827bb0b7 70 #define RX_PRIORITY (osPriorityNormal)
AdamGreen 0:3b00827bb0b7 71 #define TX_PRIORITY (osPriorityNormal)
AdamGreen 0:3b00827bb0b7 72
AdamGreen 0:3b00827bb0b7 73 /** \brief Debug output formatter lock define
AdamGreen 0:3b00827bb0b7 74 *
AdamGreen 0:3b00827bb0b7 75 * When using FreeRTOS and with LWIP_DEBUG enabled, enabling this
AdamGreen 0:3b00827bb0b7 76 * define will allow RX debug messages to not interleave with the
AdamGreen 0:3b00827bb0b7 77 * TX messages (so they are actually readable). Not enabling this
AdamGreen 0:3b00827bb0b7 78 * define when the system is under load will cause the output to
AdamGreen 0:3b00827bb0b7 79 * be unreadable. There is a small tradeoff in performance for this
AdamGreen 0:3b00827bb0b7 80 * so use it only for debug. */
AdamGreen 0:3b00827bb0b7 81 //#define LOCK_RX_THREAD
AdamGreen 0:3b00827bb0b7 82
AdamGreen 0:3b00827bb0b7 83 /** \brief Receive group interrupts
AdamGreen 0:3b00827bb0b7 84 */
AdamGreen 0:3b00827bb0b7 85 #define RXINTGROUP (EMAC_INT_RX_OVERRUN | EMAC_INT_RX_ERR | EMAC_INT_RX_DONE)
AdamGreen 0:3b00827bb0b7 86
AdamGreen 0:3b00827bb0b7 87 /** \brief Transmit group interrupts
AdamGreen 0:3b00827bb0b7 88 */
AdamGreen 0:3b00827bb0b7 89 #define TXINTGROUP (EMAC_INT_TX_UNDERRUN | EMAC_INT_TX_ERR | EMAC_INT_TX_DONE)
AdamGreen 0:3b00827bb0b7 90
AdamGreen 0:3b00827bb0b7 91 /** \brief Signal used for ethernet ISR to signal packet_rx() thread.
AdamGreen 0:3b00827bb0b7 92 */
AdamGreen 0:3b00827bb0b7 93 #define RX_SIGNAL 1
AdamGreen 0:3b00827bb0b7 94
AdamGreen 0:3b00827bb0b7 95 #else
AdamGreen 0:3b00827bb0b7 96 #define RXINTGROUP 0
AdamGreen 0:3b00827bb0b7 97 #define TXINTGROUP 0
AdamGreen 0:3b00827bb0b7 98 #endif
AdamGreen 0:3b00827bb0b7 99
AdamGreen 0:3b00827bb0b7 100 /** \brief Structure of a TX/RX descriptor
AdamGreen 0:3b00827bb0b7 101 */
AdamGreen 0:3b00827bb0b7 102 typedef struct
AdamGreen 0:3b00827bb0b7 103 {
AdamGreen 0:3b00827bb0b7 104 volatile u32_t packet; /**< Pointer to buffer */
AdamGreen 0:3b00827bb0b7 105 volatile u32_t control; /**< Control word */
AdamGreen 0:3b00827bb0b7 106 } LPC_TXRX_DESC_T;
AdamGreen 0:3b00827bb0b7 107
AdamGreen 0:3b00827bb0b7 108 /** \brief Structure of a RX status entry
AdamGreen 0:3b00827bb0b7 109 */
AdamGreen 0:3b00827bb0b7 110 typedef struct
AdamGreen 0:3b00827bb0b7 111 {
AdamGreen 0:3b00827bb0b7 112 volatile u32_t statusinfo; /**< RX status word */
AdamGreen 0:3b00827bb0b7 113 volatile u32_t statushashcrc; /**< RX hash CRC */
AdamGreen 0:3b00827bb0b7 114 } LPC_TXRX_STATUS_T;
AdamGreen 0:3b00827bb0b7 115
AdamGreen 0:3b00827bb0b7 116 /* LPC EMAC driver data structure */
AdamGreen 0:3b00827bb0b7 117 struct lpc_enetdata {
AdamGreen 0:3b00827bb0b7 118 /* prxs must be 8 byte aligned! */
AdamGreen 0:3b00827bb0b7 119 LPC_TXRX_STATUS_T prxs[LPC_NUM_BUFF_RXDESCS]; /**< Pointer to RX statuses */
AdamGreen 0:3b00827bb0b7 120 struct netif *netif; /**< Reference back to LWIP parent netif */
AdamGreen 0:3b00827bb0b7 121 LPC_TXRX_DESC_T ptxd[LPC_NUM_BUFF_TXDESCS]; /**< Pointer to TX descriptor list */
AdamGreen 0:3b00827bb0b7 122 LPC_TXRX_STATUS_T ptxs[LPC_NUM_BUFF_TXDESCS]; /**< Pointer to TX statuses */
AdamGreen 0:3b00827bb0b7 123 LPC_TXRX_DESC_T prxd[LPC_NUM_BUFF_RXDESCS]; /**< Pointer to RX descriptor list */
AdamGreen 0:3b00827bb0b7 124 struct pbuf *rxb[LPC_NUM_BUFF_RXDESCS]; /**< RX pbuf pointer list, zero-copy mode */
AdamGreen 0:3b00827bb0b7 125 u32_t rx_fill_desc_index; /**< RX descriptor next available index */
AdamGreen 0:3b00827bb0b7 126 volatile u32_t rx_free_descs; /**< Count of free RX descriptors */
AdamGreen 0:3b00827bb0b7 127 struct pbuf *txb[LPC_NUM_BUFF_TXDESCS]; /**< TX pbuf pointer list, zero-copy mode */
AdamGreen 0:3b00827bb0b7 128 u32_t lpc_last_tx_idx; /**< TX last descriptor index, zero-copy mode */
AdamGreen 0:3b00827bb0b7 129 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 130 sys_thread_t RxThread; /**< RX receive thread data object pointer */
AdamGreen 0:3b00827bb0b7 131 sys_sem_t TxCleanSem; /**< TX cleanup thread wakeup semaphore */
AdamGreen 0:3b00827bb0b7 132 sys_mutex_t TXLockMutex; /**< TX critical section mutex */
AdamGreen 0:3b00827bb0b7 133 sys_sem_t xTXDCountSem; /**< TX free buffer counting semaphore */
AdamGreen 0:3b00827bb0b7 134 #endif
AdamGreen 0:3b00827bb0b7 135 };
AdamGreen 0:3b00827bb0b7 136
AdamGreen 0:3b00827bb0b7 137 #if defined(TARGET_LPC4088)
AdamGreen 0:3b00827bb0b7 138 # if defined (__ICCARM__)
AdamGreen 0:3b00827bb0b7 139 # define ETHMEM_SECTION
AdamGreen 0:3b00827bb0b7 140 # elif defined(TOOLCHAIN_GCC_CR)
AdamGreen 0:3b00827bb0b7 141 # define ETHMEM_SECTION __attribute__((section(".data.$RamPeriph32")))
AdamGreen 0:3b00827bb0b7 142 # else
AdamGreen 0:3b00827bb0b7 143 # define ETHMEM_SECTION __attribute__((section("AHBSRAM1"),aligned))
AdamGreen 0:3b00827bb0b7 144 # endif
AdamGreen 0:3b00827bb0b7 145 #elif defined(TARGET_LPC1768)
AdamGreen 0:3b00827bb0b7 146 # if defined(TOOLCHAIN_GCC_ARM)
AdamGreen 0:3b00827bb0b7 147 # define ETHMEM_SECTION __attribute__((section("AHBSRAM1"),aligned))
AdamGreen 0:3b00827bb0b7 148 # endif
AdamGreen 0:3b00827bb0b7 149 #endif
AdamGreen 0:3b00827bb0b7 150
AdamGreen 0:3b00827bb0b7 151 #ifndef ETHMEM_SECTION
AdamGreen 0:3b00827bb0b7 152 #define ETHMEM_SECTION ALIGNED(8)
AdamGreen 0:3b00827bb0b7 153 #endif
AdamGreen 0:3b00827bb0b7 154
AdamGreen 0:3b00827bb0b7 155 /** \brief LPC EMAC driver work data
AdamGreen 0:3b00827bb0b7 156 */
AdamGreen 0:3b00827bb0b7 157 ETHMEM_SECTION struct lpc_enetdata lpc_enetdata;
AdamGreen 0:3b00827bb0b7 158
AdamGreen 0:3b00827bb0b7 159 /* Write a value via the MII link (non-blocking) */
AdamGreen 0:3b00827bb0b7 160 void lpc_mii_write_noblock(u32_t PhyReg, u32_t Value)
AdamGreen 0:3b00827bb0b7 161 {
AdamGreen 0:3b00827bb0b7 162 /* Write value at PHY address and register */
AdamGreen 0:3b00827bb0b7 163 LPC_EMAC->MADR = (LPC_PHYDEF_PHYADDR << 8) | PhyReg;
AdamGreen 0:3b00827bb0b7 164 LPC_EMAC->MWTD = Value;
AdamGreen 0:3b00827bb0b7 165 }
AdamGreen 0:3b00827bb0b7 166
AdamGreen 0:3b00827bb0b7 167 /* Write a value via the MII link (blocking) */
AdamGreen 0:3b00827bb0b7 168 err_t lpc_mii_write(u32_t PhyReg, u32_t Value)
AdamGreen 0:3b00827bb0b7 169 {
AdamGreen 0:3b00827bb0b7 170 u32_t mst = 250;
AdamGreen 0:3b00827bb0b7 171 err_t sts = ERR_OK;
AdamGreen 0:3b00827bb0b7 172
AdamGreen 0:3b00827bb0b7 173 /* Write value at PHY address and register */
AdamGreen 0:3b00827bb0b7 174 lpc_mii_write_noblock(PhyReg, Value);
AdamGreen 0:3b00827bb0b7 175
AdamGreen 0:3b00827bb0b7 176 /* Wait for unbusy status */
AdamGreen 0:3b00827bb0b7 177 while (mst > 0) {
AdamGreen 0:3b00827bb0b7 178 sts = LPC_EMAC->MIND;
AdamGreen 0:3b00827bb0b7 179 if ((sts & EMAC_MIND_BUSY) == 0)
AdamGreen 0:3b00827bb0b7 180 mst = 0;
AdamGreen 0:3b00827bb0b7 181 else {
AdamGreen 0:3b00827bb0b7 182 mst--;
AdamGreen 0:3b00827bb0b7 183 osDelay(1);
AdamGreen 0:3b00827bb0b7 184 }
AdamGreen 0:3b00827bb0b7 185 }
AdamGreen 0:3b00827bb0b7 186
AdamGreen 0:3b00827bb0b7 187 if (sts != 0)
AdamGreen 0:3b00827bb0b7 188 sts = ERR_TIMEOUT;
AdamGreen 0:3b00827bb0b7 189
AdamGreen 0:3b00827bb0b7 190 return sts;
AdamGreen 0:3b00827bb0b7 191 }
AdamGreen 0:3b00827bb0b7 192
AdamGreen 0:3b00827bb0b7 193 /* Reads current MII link busy status */
AdamGreen 0:3b00827bb0b7 194 u32_t lpc_mii_is_busy(void)
AdamGreen 0:3b00827bb0b7 195 {
AdamGreen 0:3b00827bb0b7 196 return (u32_t) (LPC_EMAC->MIND & EMAC_MIND_BUSY);
AdamGreen 0:3b00827bb0b7 197 }
AdamGreen 0:3b00827bb0b7 198
AdamGreen 0:3b00827bb0b7 199 /* Starts a read operation via the MII link (non-blocking) */
AdamGreen 0:3b00827bb0b7 200 u32_t lpc_mii_read_data(void)
AdamGreen 0:3b00827bb0b7 201 {
AdamGreen 0:3b00827bb0b7 202 u32_t data = LPC_EMAC->MRDD;
AdamGreen 0:3b00827bb0b7 203 LPC_EMAC->MCMD = 0;
AdamGreen 0:3b00827bb0b7 204
AdamGreen 0:3b00827bb0b7 205 return data;
AdamGreen 0:3b00827bb0b7 206 }
AdamGreen 0:3b00827bb0b7 207
AdamGreen 0:3b00827bb0b7 208 /* Starts a read operation via the MII link (non-blocking) */
AdamGreen 0:3b00827bb0b7 209 void lpc_mii_read_noblock(u32_t PhyReg)
AdamGreen 0:3b00827bb0b7 210 {
AdamGreen 0:3b00827bb0b7 211 /* Read value at PHY address and register */
AdamGreen 0:3b00827bb0b7 212 LPC_EMAC->MADR = (LPC_PHYDEF_PHYADDR << 8) | PhyReg;
AdamGreen 0:3b00827bb0b7 213 LPC_EMAC->MCMD = EMAC_MCMD_READ;
AdamGreen 0:3b00827bb0b7 214 }
AdamGreen 0:3b00827bb0b7 215
AdamGreen 0:3b00827bb0b7 216 /* Read a value via the MII link (blocking) */
AdamGreen 0:3b00827bb0b7 217 err_t lpc_mii_read(u32_t PhyReg, u32_t *data)
AdamGreen 0:3b00827bb0b7 218 {
AdamGreen 0:3b00827bb0b7 219 u32_t mst = 250;
AdamGreen 0:3b00827bb0b7 220 err_t sts = ERR_OK;
AdamGreen 0:3b00827bb0b7 221
AdamGreen 0:3b00827bb0b7 222 /* Read value at PHY address and register */
AdamGreen 0:3b00827bb0b7 223 lpc_mii_read_noblock(PhyReg);
AdamGreen 0:3b00827bb0b7 224
AdamGreen 0:3b00827bb0b7 225 /* Wait for unbusy status */
AdamGreen 0:3b00827bb0b7 226 while (mst > 0) {
AdamGreen 0:3b00827bb0b7 227 sts = LPC_EMAC->MIND & ~EMAC_MIND_MII_LINK_FAIL;
AdamGreen 0:3b00827bb0b7 228 if ((sts & EMAC_MIND_BUSY) == 0) {
AdamGreen 0:3b00827bb0b7 229 mst = 0;
AdamGreen 0:3b00827bb0b7 230 *data = LPC_EMAC->MRDD;
AdamGreen 0:3b00827bb0b7 231 } else {
AdamGreen 0:3b00827bb0b7 232 mst--;
AdamGreen 0:3b00827bb0b7 233 osDelay(1);
AdamGreen 0:3b00827bb0b7 234 }
AdamGreen 0:3b00827bb0b7 235 }
AdamGreen 0:3b00827bb0b7 236
AdamGreen 0:3b00827bb0b7 237 LPC_EMAC->MCMD = 0;
AdamGreen 0:3b00827bb0b7 238
AdamGreen 0:3b00827bb0b7 239 if (sts != 0)
AdamGreen 0:3b00827bb0b7 240 sts = ERR_TIMEOUT;
AdamGreen 0:3b00827bb0b7 241
AdamGreen 0:3b00827bb0b7 242 return sts;
AdamGreen 0:3b00827bb0b7 243 }
AdamGreen 0:3b00827bb0b7 244
AdamGreen 0:3b00827bb0b7 245 /** \brief Queues a pbuf into the RX descriptor list
AdamGreen 0:3b00827bb0b7 246 *
AdamGreen 0:3b00827bb0b7 247 * \param[in] lpc_enetif Pointer to the drvier data structure
AdamGreen 0:3b00827bb0b7 248 * \param[in] p Pointer to pbuf to queue
AdamGreen 0:3b00827bb0b7 249 */
AdamGreen 0:3b00827bb0b7 250 static void lpc_rxqueue_pbuf(struct lpc_enetdata *lpc_enetif, struct pbuf *p)
AdamGreen 0:3b00827bb0b7 251 {
AdamGreen 0:3b00827bb0b7 252 u32_t idx;
AdamGreen 0:3b00827bb0b7 253
AdamGreen 0:3b00827bb0b7 254 /* Get next free descriptor index */
AdamGreen 0:3b00827bb0b7 255 idx = lpc_enetif->rx_fill_desc_index;
AdamGreen 0:3b00827bb0b7 256
AdamGreen 0:3b00827bb0b7 257 /* Setup descriptor and clear statuses */
AdamGreen 0:3b00827bb0b7 258 lpc_enetif->prxd[idx].control = EMAC_RCTRL_INT | ((u32_t) (p->len - 1));
AdamGreen 0:3b00827bb0b7 259 lpc_enetif->prxd[idx].packet = (u32_t) p->payload;
AdamGreen 0:3b00827bb0b7 260 lpc_enetif->prxs[idx].statusinfo = 0xFFFFFFFF;
AdamGreen 0:3b00827bb0b7 261 lpc_enetif->prxs[idx].statushashcrc = 0xFFFFFFFF;
AdamGreen 0:3b00827bb0b7 262
AdamGreen 0:3b00827bb0b7 263 /* Save pbuf pointer for push to network layer later */
AdamGreen 0:3b00827bb0b7 264 lpc_enetif->rxb[idx] = p;
AdamGreen 0:3b00827bb0b7 265
AdamGreen 0:3b00827bb0b7 266 /* Wrap at end of descriptor list */
AdamGreen 0:3b00827bb0b7 267 idx++;
AdamGreen 0:3b00827bb0b7 268 if (idx >= LPC_NUM_BUFF_RXDESCS)
AdamGreen 0:3b00827bb0b7 269 idx = 0;
AdamGreen 0:3b00827bb0b7 270
AdamGreen 0:3b00827bb0b7 271 /* Queue descriptor(s) */
AdamGreen 0:3b00827bb0b7 272 lpc_enetif->rx_free_descs -= 1;
AdamGreen 0:3b00827bb0b7 273 lpc_enetif->rx_fill_desc_index = idx;
AdamGreen 0:3b00827bb0b7 274 LPC_EMAC->RxConsumeIndex = idx;
AdamGreen 0:3b00827bb0b7 275
AdamGreen 0:3b00827bb0b7 276 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
AdamGreen 0:3b00827bb0b7 277 ("lpc_rxqueue_pbuf: pbuf packet queued: %p (free desc=%d)\n", p,
AdamGreen 0:3b00827bb0b7 278 lpc_enetif->rx_free_descs));
AdamGreen 0:3b00827bb0b7 279 }
AdamGreen 0:3b00827bb0b7 280
AdamGreen 0:3b00827bb0b7 281 /** \brief Attempt to allocate and requeue a new pbuf for RX
AdamGreen 0:3b00827bb0b7 282 *
AdamGreen 0:3b00827bb0b7 283 * \param[in] netif Pointer to the netif structure
AdamGreen 0:3b00827bb0b7 284 * \returns 1 if a packet was allocated and requeued, otherwise 0
AdamGreen 0:3b00827bb0b7 285 */
AdamGreen 0:3b00827bb0b7 286 s32_t lpc_rx_queue(struct netif *netif)
AdamGreen 0:3b00827bb0b7 287 {
AdamGreen 0:3b00827bb0b7 288 struct lpc_enetdata *lpc_enetif = netif->state;
AdamGreen 0:3b00827bb0b7 289 struct pbuf *p;
AdamGreen 0:3b00827bb0b7 290 s32_t queued = 0;
AdamGreen 0:3b00827bb0b7 291
AdamGreen 0:3b00827bb0b7 292 /* Attempt to requeue as many packets as possible */
AdamGreen 0:3b00827bb0b7 293 while (lpc_enetif->rx_free_descs > 0) {
AdamGreen 0:3b00827bb0b7 294 /* Allocate a pbuf from the pool. We need to allocate at the
AdamGreen 0:3b00827bb0b7 295 maximum size as we don't know the size of the yet to be
AdamGreen 0:3b00827bb0b7 296 received packet. */
AdamGreen 0:3b00827bb0b7 297 p = pbuf_alloc(PBUF_RAW, (u16_t) EMAC_ETH_MAX_FLEN, PBUF_RAM);
AdamGreen 0:3b00827bb0b7 298 if (p == NULL) {
AdamGreen 0:3b00827bb0b7 299 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
AdamGreen 0:3b00827bb0b7 300 ("lpc_rx_queue: could not allocate RX pbuf (free desc=%d)\n",
AdamGreen 0:3b00827bb0b7 301 lpc_enetif->rx_free_descs));
AdamGreen 0:3b00827bb0b7 302 return queued;
AdamGreen 0:3b00827bb0b7 303 }
AdamGreen 0:3b00827bb0b7 304
AdamGreen 0:3b00827bb0b7 305 /* pbufs allocated from the RAM pool should be non-chained. */
AdamGreen 0:3b00827bb0b7 306 LWIP_ASSERT("lpc_rx_queue: pbuf is not contiguous (chained)",
AdamGreen 0:3b00827bb0b7 307 pbuf_clen(p) <= 1);
AdamGreen 0:3b00827bb0b7 308
AdamGreen 0:3b00827bb0b7 309 /* Queue packet */
AdamGreen 0:3b00827bb0b7 310 lpc_rxqueue_pbuf(lpc_enetif, p);
AdamGreen 0:3b00827bb0b7 311
AdamGreen 0:3b00827bb0b7 312 /* Update queued count */
AdamGreen 0:3b00827bb0b7 313 queued++;
AdamGreen 0:3b00827bb0b7 314 }
AdamGreen 0:3b00827bb0b7 315
AdamGreen 0:3b00827bb0b7 316 return queued;
AdamGreen 0:3b00827bb0b7 317 }
AdamGreen 0:3b00827bb0b7 318
AdamGreen 0:3b00827bb0b7 319 /** \brief Sets up the RX descriptor ring buffers.
AdamGreen 0:3b00827bb0b7 320 *
AdamGreen 0:3b00827bb0b7 321 * This function sets up the descriptor list used for receive packets.
AdamGreen 0:3b00827bb0b7 322 *
AdamGreen 0:3b00827bb0b7 323 * \param[in] lpc_enetif Pointer to driver data structure
AdamGreen 0:3b00827bb0b7 324 * \returns Always returns ERR_OK
AdamGreen 0:3b00827bb0b7 325 */
AdamGreen 0:3b00827bb0b7 326 static err_t lpc_rx_setup(struct lpc_enetdata *lpc_enetif)
AdamGreen 0:3b00827bb0b7 327 {
AdamGreen 0:3b00827bb0b7 328 /* Setup pointers to RX structures */
AdamGreen 0:3b00827bb0b7 329 LPC_EMAC->RxDescriptor = (u32_t) &lpc_enetif->prxd[0];
AdamGreen 0:3b00827bb0b7 330 LPC_EMAC->RxStatus = (u32_t) &lpc_enetif->prxs[0];
AdamGreen 0:3b00827bb0b7 331 LPC_EMAC->RxDescriptorNumber = LPC_NUM_BUFF_RXDESCS - 1;
AdamGreen 0:3b00827bb0b7 332
AdamGreen 0:3b00827bb0b7 333 lpc_enetif->rx_free_descs = LPC_NUM_BUFF_RXDESCS;
AdamGreen 0:3b00827bb0b7 334 lpc_enetif->rx_fill_desc_index = 0;
AdamGreen 0:3b00827bb0b7 335
AdamGreen 0:3b00827bb0b7 336 /* Build RX buffer and descriptors */
AdamGreen 0:3b00827bb0b7 337 lpc_rx_queue(lpc_enetif->netif);
AdamGreen 0:3b00827bb0b7 338
AdamGreen 0:3b00827bb0b7 339 return ERR_OK;
AdamGreen 0:3b00827bb0b7 340 }
AdamGreen 0:3b00827bb0b7 341
AdamGreen 0:3b00827bb0b7 342 /** \brief Allocates a pbuf and returns the data from the incoming packet.
AdamGreen 0:3b00827bb0b7 343 *
AdamGreen 0:3b00827bb0b7 344 * \param[in] netif the lwip network interface structure for this lpc_enetif
AdamGreen 0:3b00827bb0b7 345 * \return a pbuf filled with the received packet (including MAC header)
AdamGreen 0:3b00827bb0b7 346 * NULL on memory error
AdamGreen 0:3b00827bb0b7 347 */
AdamGreen 0:3b00827bb0b7 348 static struct pbuf *lpc_low_level_input(struct netif *netif)
AdamGreen 0:3b00827bb0b7 349 {
AdamGreen 0:3b00827bb0b7 350 struct lpc_enetdata *lpc_enetif = netif->state;
AdamGreen 0:3b00827bb0b7 351 struct pbuf *p = NULL;
AdamGreen 0:3b00827bb0b7 352 u32_t idx, length;
AdamGreen 0:3b00827bb0b7 353 u16_t origLength;
AdamGreen 0:3b00827bb0b7 354
AdamGreen 0:3b00827bb0b7 355 #ifdef LOCK_RX_THREAD
AdamGreen 0:3b00827bb0b7 356 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 357 /* Get exclusive access */
AdamGreen 0:3b00827bb0b7 358 sys_mutex_lock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 359 #endif
AdamGreen 0:3b00827bb0b7 360 #endif
AdamGreen 0:3b00827bb0b7 361
AdamGreen 0:3b00827bb0b7 362 /* Monitor RX overrun status. This should never happen unless
AdamGreen 0:3b00827bb0b7 363 (possibly) the internal bus is behing held up by something.
AdamGreen 0:3b00827bb0b7 364 Unless your system is running at a very low clock speed or
AdamGreen 0:3b00827bb0b7 365 there are possibilities that the internal buses may be held
AdamGreen 0:3b00827bb0b7 366 up for a long time, this can probably safely be removed. */
AdamGreen 0:3b00827bb0b7 367 if (LPC_EMAC->IntStatus & EMAC_INT_RX_OVERRUN) {
AdamGreen 0:3b00827bb0b7 368 LINK_STATS_INC(link.err);
AdamGreen 0:3b00827bb0b7 369 LINK_STATS_INC(link.drop);
AdamGreen 0:3b00827bb0b7 370
AdamGreen 0:3b00827bb0b7 371 /* Temporarily disable RX */
AdamGreen 0:3b00827bb0b7 372 LPC_EMAC->MAC1 &= ~EMAC_MAC1_REC_EN;
AdamGreen 0:3b00827bb0b7 373
AdamGreen 0:3b00827bb0b7 374 /* Reset the RX side */
AdamGreen 0:3b00827bb0b7 375 LPC_EMAC->MAC1 |= EMAC_MAC1_RES_RX;
AdamGreen 0:3b00827bb0b7 376 LPC_EMAC->IntClear = EMAC_INT_RX_OVERRUN;
AdamGreen 0:3b00827bb0b7 377
AdamGreen 0:3b00827bb0b7 378 /* De-allocate all queued RX pbufs */
AdamGreen 0:3b00827bb0b7 379 for (idx = 0; idx < LPC_NUM_BUFF_RXDESCS; idx++) {
AdamGreen 0:3b00827bb0b7 380 if (lpc_enetif->rxb[idx] != NULL) {
AdamGreen 0:3b00827bb0b7 381 pbuf_free(lpc_enetif->rxb[idx]);
AdamGreen 0:3b00827bb0b7 382 lpc_enetif->rxb[idx] = NULL;
AdamGreen 0:3b00827bb0b7 383 }
AdamGreen 0:3b00827bb0b7 384 }
AdamGreen 0:3b00827bb0b7 385
AdamGreen 0:3b00827bb0b7 386 /* Start RX side again */
AdamGreen 0:3b00827bb0b7 387 lpc_rx_setup(lpc_enetif);
AdamGreen 0:3b00827bb0b7 388
AdamGreen 0:3b00827bb0b7 389 /* Re-enable RX */
AdamGreen 0:3b00827bb0b7 390 LPC_EMAC->MAC1 |= EMAC_MAC1_REC_EN;
AdamGreen 0:3b00827bb0b7 391
AdamGreen 0:3b00827bb0b7 392 #ifdef LOCK_RX_THREAD
AdamGreen 0:3b00827bb0b7 393 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 394 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 395 #endif
AdamGreen 0:3b00827bb0b7 396 #endif
AdamGreen 0:3b00827bb0b7 397
AdamGreen 0:3b00827bb0b7 398 return NULL;
AdamGreen 0:3b00827bb0b7 399 }
AdamGreen 0:3b00827bb0b7 400
AdamGreen 0:3b00827bb0b7 401 /* Determine if a frame has been received */
AdamGreen 0:3b00827bb0b7 402 length = 0;
AdamGreen 0:3b00827bb0b7 403 idx = LPC_EMAC->RxConsumeIndex;
AdamGreen 0:3b00827bb0b7 404 if (LPC_EMAC->RxProduceIndex != idx) {
AdamGreen 0:3b00827bb0b7 405 /* Handle errors */
AdamGreen 0:3b00827bb0b7 406 if (lpc_enetif->prxs[idx].statusinfo & (EMAC_RINFO_CRC_ERR |
AdamGreen 0:3b00827bb0b7 407 EMAC_RINFO_SYM_ERR | EMAC_RINFO_ALIGN_ERR | EMAC_RINFO_LEN_ERR)) {
AdamGreen 0:3b00827bb0b7 408 #if LINK_STATS
AdamGreen 0:3b00827bb0b7 409 if (lpc_enetif->prxs[idx].statusinfo & (EMAC_RINFO_CRC_ERR |
AdamGreen 0:3b00827bb0b7 410 EMAC_RINFO_SYM_ERR | EMAC_RINFO_ALIGN_ERR))
AdamGreen 0:3b00827bb0b7 411 LINK_STATS_INC(link.chkerr);
AdamGreen 0:3b00827bb0b7 412 if (lpc_enetif->prxs[idx].statusinfo & EMAC_RINFO_LEN_ERR)
AdamGreen 0:3b00827bb0b7 413 LINK_STATS_INC(link.lenerr);
AdamGreen 0:3b00827bb0b7 414 #endif
AdamGreen 0:3b00827bb0b7 415
AdamGreen 0:3b00827bb0b7 416 /* Drop the frame */
AdamGreen 0:3b00827bb0b7 417 LINK_STATS_INC(link.drop);
AdamGreen 0:3b00827bb0b7 418
AdamGreen 0:3b00827bb0b7 419 /* Re-queue the pbuf for receive */
AdamGreen 0:3b00827bb0b7 420 lpc_enetif->rx_free_descs++;
AdamGreen 0:3b00827bb0b7 421 p = lpc_enetif->rxb[idx];
AdamGreen 0:3b00827bb0b7 422 lpc_enetif->rxb[idx] = NULL;
AdamGreen 0:3b00827bb0b7 423 lpc_rxqueue_pbuf(lpc_enetif, p);
AdamGreen 0:3b00827bb0b7 424
AdamGreen 0:3b00827bb0b7 425 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
AdamGreen 0:3b00827bb0b7 426 ("lpc_low_level_input: Packet dropped with errors (0x%x)\n",
AdamGreen 0:3b00827bb0b7 427 lpc_enetif->prxs[idx].statusinfo));
AdamGreen 0:3b00827bb0b7 428
AdamGreen 0:3b00827bb0b7 429 p = NULL;
AdamGreen 0:3b00827bb0b7 430 } else {
AdamGreen 0:3b00827bb0b7 431 /* A packet is waiting, get length */
AdamGreen 0:3b00827bb0b7 432 length = (lpc_enetif->prxs[idx].statusinfo & 0x7FF) + 1;
AdamGreen 0:3b00827bb0b7 433
AdamGreen 0:3b00827bb0b7 434 /* Zero-copy */
AdamGreen 0:3b00827bb0b7 435 p = lpc_enetif->rxb[idx];
AdamGreen 0:3b00827bb0b7 436 origLength = p->len;
AdamGreen 0:3b00827bb0b7 437 p->len = (u16_t) length;
AdamGreen 0:3b00827bb0b7 438
AdamGreen 0:3b00827bb0b7 439 /* Free pbuf from descriptor */
AdamGreen 0:3b00827bb0b7 440 lpc_enetif->rxb[idx] = NULL;
AdamGreen 0:3b00827bb0b7 441 lpc_enetif->rx_free_descs++;
AdamGreen 0:3b00827bb0b7 442
AdamGreen 0:3b00827bb0b7 443 /* Attempt to queue new buffer(s) */
AdamGreen 0:3b00827bb0b7 444 if (lpc_rx_queue(lpc_enetif->netif) == 0) {
AdamGreen 0:3b00827bb0b7 445 /* Drop the frame due to OOM. */
AdamGreen 0:3b00827bb0b7 446 LINK_STATS_INC(link.drop);
AdamGreen 0:3b00827bb0b7 447
AdamGreen 0:3b00827bb0b7 448 /* Re-queue the pbuf for receive */
AdamGreen 0:3b00827bb0b7 449 p->len = origLength;
AdamGreen 0:3b00827bb0b7 450 lpc_rxqueue_pbuf(lpc_enetif, p);
AdamGreen 0:3b00827bb0b7 451
AdamGreen 0:3b00827bb0b7 452 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
AdamGreen 0:3b00827bb0b7 453 ("lpc_low_level_input: Packet index %d dropped for OOM\n",
AdamGreen 0:3b00827bb0b7 454 idx));
AdamGreen 0:3b00827bb0b7 455
AdamGreen 0:3b00827bb0b7 456 #ifdef LOCK_RX_THREAD
AdamGreen 0:3b00827bb0b7 457 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 458 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 459 #endif
AdamGreen 0:3b00827bb0b7 460 #endif
AdamGreen 0:3b00827bb0b7 461
AdamGreen 0:3b00827bb0b7 462 return NULL;
AdamGreen 0:3b00827bb0b7 463 }
AdamGreen 0:3b00827bb0b7 464
AdamGreen 0:3b00827bb0b7 465 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
AdamGreen 0:3b00827bb0b7 466 ("lpc_low_level_input: Packet received: %p, size %d (index=%d)\n",
AdamGreen 0:3b00827bb0b7 467 p, length, idx));
AdamGreen 0:3b00827bb0b7 468
AdamGreen 0:3b00827bb0b7 469 /* Save size */
AdamGreen 0:3b00827bb0b7 470 p->tot_len = (u16_t) length;
AdamGreen 0:3b00827bb0b7 471 LINK_STATS_INC(link.recv);
AdamGreen 0:3b00827bb0b7 472 }
AdamGreen 0:3b00827bb0b7 473 }
AdamGreen 0:3b00827bb0b7 474
AdamGreen 0:3b00827bb0b7 475 #ifdef LOCK_RX_THREAD
AdamGreen 0:3b00827bb0b7 476 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 477 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 478 #endif
AdamGreen 0:3b00827bb0b7 479 #endif
AdamGreen 0:3b00827bb0b7 480
AdamGreen 0:3b00827bb0b7 481 return p;
AdamGreen 0:3b00827bb0b7 482 }
AdamGreen 0:3b00827bb0b7 483
AdamGreen 0:3b00827bb0b7 484 /** \brief Attempt to read a packet from the EMAC interface.
AdamGreen 0:3b00827bb0b7 485 *
AdamGreen 0:3b00827bb0b7 486 * \param[in] netif the lwip network interface structure for this lpc_enetif
AdamGreen 0:3b00827bb0b7 487 */
AdamGreen 0:3b00827bb0b7 488 void lpc_enetif_input(struct netif *netif)
AdamGreen 0:3b00827bb0b7 489 {
AdamGreen 0:3b00827bb0b7 490 struct eth_hdr *ethhdr;
AdamGreen 0:3b00827bb0b7 491 struct pbuf *p;
AdamGreen 0:3b00827bb0b7 492
AdamGreen 0:3b00827bb0b7 493 /* move received packet into a new pbuf */
AdamGreen 0:3b00827bb0b7 494 p = lpc_low_level_input(netif);
AdamGreen 0:3b00827bb0b7 495 if (p == NULL)
AdamGreen 0:3b00827bb0b7 496 return;
AdamGreen 0:3b00827bb0b7 497
AdamGreen 0:3b00827bb0b7 498 /* points to packet payload, which starts with an Ethernet header */
AdamGreen 0:3b00827bb0b7 499 ethhdr = p->payload;
AdamGreen 0:3b00827bb0b7 500
AdamGreen 0:3b00827bb0b7 501 switch (htons(ethhdr->type)) {
AdamGreen 0:3b00827bb0b7 502 case ETHTYPE_IP:
AdamGreen 0:3b00827bb0b7 503 case ETHTYPE_ARP:
AdamGreen 0:3b00827bb0b7 504 #if PPPOE_SUPPORT
AdamGreen 0:3b00827bb0b7 505 case ETHTYPE_PPPOEDISC:
AdamGreen 0:3b00827bb0b7 506 case ETHTYPE_PPPOE:
AdamGreen 0:3b00827bb0b7 507 #endif /* PPPOE_SUPPORT */
AdamGreen 0:3b00827bb0b7 508 /* full packet send to tcpip_thread to process */
AdamGreen 0:3b00827bb0b7 509 if (netif->input(p, netif) != ERR_OK) {
AdamGreen 0:3b00827bb0b7 510 LWIP_DEBUGF(NETIF_DEBUG, ("lpc_enetif_input: IP input error\n"));
AdamGreen 0:3b00827bb0b7 511 /* Free buffer */
AdamGreen 0:3b00827bb0b7 512 pbuf_free(p);
AdamGreen 0:3b00827bb0b7 513 }
AdamGreen 0:3b00827bb0b7 514 break;
AdamGreen 0:3b00827bb0b7 515
AdamGreen 0:3b00827bb0b7 516 default:
AdamGreen 0:3b00827bb0b7 517 /* Return buffer */
AdamGreen 0:3b00827bb0b7 518 pbuf_free(p);
AdamGreen 0:3b00827bb0b7 519 break;
AdamGreen 0:3b00827bb0b7 520 }
AdamGreen 0:3b00827bb0b7 521 }
AdamGreen 0:3b00827bb0b7 522
AdamGreen 0:3b00827bb0b7 523 /** \brief Determine if the passed address is usable for the ethernet
AdamGreen 0:3b00827bb0b7 524 * DMA controller.
AdamGreen 0:3b00827bb0b7 525 *
AdamGreen 0:3b00827bb0b7 526 * \param[in] addr Address of packet to check for DMA safe operation
AdamGreen 0:3b00827bb0b7 527 * \return 1 if the packet address is not safe, otherwise 0
AdamGreen 0:3b00827bb0b7 528 */
AdamGreen 0:3b00827bb0b7 529 static s32_t lpc_packet_addr_notsafe(void *addr) {
AdamGreen 0:3b00827bb0b7 530 /* Check for legal address ranges */
AdamGreen 0:3b00827bb0b7 531 #if defined(TARGET_LPC1768)
AdamGreen 0:3b00827bb0b7 532 if ((((u32_t) addr >= 0x2007C000) && ((u32_t) addr < 0x20083FFF))) {
AdamGreen 0:3b00827bb0b7 533 #elif defined(TARGET_LPC4088)
AdamGreen 0:3b00827bb0b7 534 if ((((u32_t) addr >= 0x20000000) && ((u32_t) addr < 0x20007FFF))) {
AdamGreen 0:3b00827bb0b7 535 #endif
AdamGreen 0:3b00827bb0b7 536 return 0;
AdamGreen 0:3b00827bb0b7 537 }
AdamGreen 0:3b00827bb0b7 538 return 1;
AdamGreen 0:3b00827bb0b7 539 }
AdamGreen 0:3b00827bb0b7 540
AdamGreen 0:3b00827bb0b7 541 /** \brief Sets up the TX descriptor ring buffers.
AdamGreen 0:3b00827bb0b7 542 *
AdamGreen 0:3b00827bb0b7 543 * This function sets up the descriptor list used for transmit packets.
AdamGreen 0:3b00827bb0b7 544 *
AdamGreen 0:3b00827bb0b7 545 * \param[in] lpc_enetif Pointer to driver data structure
AdamGreen 0:3b00827bb0b7 546 */
AdamGreen 0:3b00827bb0b7 547 static err_t lpc_tx_setup(struct lpc_enetdata *lpc_enetif)
AdamGreen 0:3b00827bb0b7 548 {
AdamGreen 0:3b00827bb0b7 549 s32_t idx;
AdamGreen 0:3b00827bb0b7 550
AdamGreen 0:3b00827bb0b7 551 /* Build TX descriptors for local buffers */
AdamGreen 0:3b00827bb0b7 552 for (idx = 0; idx < LPC_NUM_BUFF_TXDESCS; idx++) {
AdamGreen 0:3b00827bb0b7 553 lpc_enetif->ptxd[idx].control = 0;
AdamGreen 0:3b00827bb0b7 554 lpc_enetif->ptxs[idx].statusinfo = 0xFFFFFFFF;
AdamGreen 0:3b00827bb0b7 555 }
AdamGreen 0:3b00827bb0b7 556
AdamGreen 0:3b00827bb0b7 557 /* Setup pointers to TX structures */
AdamGreen 0:3b00827bb0b7 558 LPC_EMAC->TxDescriptor = (u32_t) &lpc_enetif->ptxd[0];
AdamGreen 0:3b00827bb0b7 559 LPC_EMAC->TxStatus = (u32_t) &lpc_enetif->ptxs[0];
AdamGreen 0:3b00827bb0b7 560 LPC_EMAC->TxDescriptorNumber = LPC_NUM_BUFF_TXDESCS - 1;
AdamGreen 0:3b00827bb0b7 561
AdamGreen 0:3b00827bb0b7 562 lpc_enetif->lpc_last_tx_idx = 0;
AdamGreen 0:3b00827bb0b7 563
AdamGreen 0:3b00827bb0b7 564 return ERR_OK;
AdamGreen 0:3b00827bb0b7 565 }
AdamGreen 0:3b00827bb0b7 566
AdamGreen 0:3b00827bb0b7 567 /** \brief Free TX buffers that are complete
AdamGreen 0:3b00827bb0b7 568 *
AdamGreen 0:3b00827bb0b7 569 * \param[in] lpc_enetif Pointer to driver data structure
AdamGreen 0:3b00827bb0b7 570 * \param[in] cidx EMAC current descriptor comsumer index
AdamGreen 0:3b00827bb0b7 571 */
AdamGreen 0:3b00827bb0b7 572 static void lpc_tx_reclaim_st(struct lpc_enetdata *lpc_enetif, u32_t cidx)
AdamGreen 0:3b00827bb0b7 573 {
AdamGreen 0:3b00827bb0b7 574 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 575 /* Get exclusive access */
AdamGreen 0:3b00827bb0b7 576 sys_mutex_lock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 577 #endif
AdamGreen 0:3b00827bb0b7 578
AdamGreen 0:3b00827bb0b7 579 while (cidx != lpc_enetif->lpc_last_tx_idx) {
AdamGreen 0:3b00827bb0b7 580 if (lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx] != NULL) {
AdamGreen 0:3b00827bb0b7 581 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
AdamGreen 0:3b00827bb0b7 582 ("lpc_tx_reclaim_st: Freeing packet %p (index %d)\n",
AdamGreen 0:3b00827bb0b7 583 lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx],
AdamGreen 0:3b00827bb0b7 584 lpc_enetif->lpc_last_tx_idx));
AdamGreen 0:3b00827bb0b7 585 pbuf_free(lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx]);
AdamGreen 0:3b00827bb0b7 586 lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx] = NULL;
AdamGreen 0:3b00827bb0b7 587 }
AdamGreen 0:3b00827bb0b7 588
AdamGreen 0:3b00827bb0b7 589 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 590 osSemaphoreRelease(lpc_enetif->xTXDCountSem.id);
AdamGreen 0:3b00827bb0b7 591 #endif
AdamGreen 0:3b00827bb0b7 592 lpc_enetif->lpc_last_tx_idx++;
AdamGreen 0:3b00827bb0b7 593 if (lpc_enetif->lpc_last_tx_idx >= LPC_NUM_BUFF_TXDESCS)
AdamGreen 0:3b00827bb0b7 594 lpc_enetif->lpc_last_tx_idx = 0;
AdamGreen 0:3b00827bb0b7 595 }
AdamGreen 0:3b00827bb0b7 596
AdamGreen 0:3b00827bb0b7 597 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 598 /* Restore access */
AdamGreen 0:3b00827bb0b7 599 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 600 #endif
AdamGreen 0:3b00827bb0b7 601 }
AdamGreen 0:3b00827bb0b7 602
AdamGreen 0:3b00827bb0b7 603 /** \brief User call for freeingTX buffers that are complete
AdamGreen 0:3b00827bb0b7 604 *
AdamGreen 0:3b00827bb0b7 605 * \param[in] netif the lwip network interface structure for this lpc_enetif
AdamGreen 0:3b00827bb0b7 606 */
AdamGreen 0:3b00827bb0b7 607 void lpc_tx_reclaim(struct netif *netif)
AdamGreen 0:3b00827bb0b7 608 {
AdamGreen 0:3b00827bb0b7 609 lpc_tx_reclaim_st((struct lpc_enetdata *) netif->state,
AdamGreen 0:3b00827bb0b7 610 LPC_EMAC->TxConsumeIndex);
AdamGreen 0:3b00827bb0b7 611 }
AdamGreen 0:3b00827bb0b7 612
AdamGreen 0:3b00827bb0b7 613 /** \brief Polls if an available TX descriptor is ready. Can be used to
AdamGreen 0:3b00827bb0b7 614 * determine if the low level transmit function will block.
AdamGreen 0:3b00827bb0b7 615 *
AdamGreen 0:3b00827bb0b7 616 * \param[in] netif the lwip network interface structure for this lpc_enetif
AdamGreen 0:3b00827bb0b7 617 * \return 0 if no descriptors are read, or >0
AdamGreen 0:3b00827bb0b7 618 */
AdamGreen 0:3b00827bb0b7 619 s32_t lpc_tx_ready(struct netif *netif)
AdamGreen 0:3b00827bb0b7 620 {
AdamGreen 0:3b00827bb0b7 621 s32_t fb;
AdamGreen 0:3b00827bb0b7 622 u32_t idx, cidx;
AdamGreen 0:3b00827bb0b7 623
AdamGreen 0:3b00827bb0b7 624 cidx = LPC_EMAC->TxConsumeIndex;
AdamGreen 0:3b00827bb0b7 625 idx = LPC_EMAC->TxProduceIndex;
AdamGreen 0:3b00827bb0b7 626
AdamGreen 0:3b00827bb0b7 627 /* Determine number of free buffers */
AdamGreen 0:3b00827bb0b7 628 if (idx == cidx)
AdamGreen 0:3b00827bb0b7 629 fb = LPC_NUM_BUFF_TXDESCS;
AdamGreen 0:3b00827bb0b7 630 else if (cidx > idx)
AdamGreen 0:3b00827bb0b7 631 fb = (LPC_NUM_BUFF_TXDESCS - 1) -
AdamGreen 0:3b00827bb0b7 632 ((idx + LPC_NUM_BUFF_TXDESCS) - cidx);
AdamGreen 0:3b00827bb0b7 633 else
AdamGreen 0:3b00827bb0b7 634 fb = (LPC_NUM_BUFF_TXDESCS - 1) - (cidx - idx);
AdamGreen 0:3b00827bb0b7 635
AdamGreen 0:3b00827bb0b7 636 return fb;
AdamGreen 0:3b00827bb0b7 637 }
AdamGreen 0:3b00827bb0b7 638
AdamGreen 0:3b00827bb0b7 639 /** \brief Low level output of a packet. Never call this from an
AdamGreen 0:3b00827bb0b7 640 * interrupt context, as it may block until TX descriptors
AdamGreen 0:3b00827bb0b7 641 * become available.
AdamGreen 0:3b00827bb0b7 642 *
AdamGreen 0:3b00827bb0b7 643 * \param[in] netif the lwip network interface structure for this lpc_enetif
AdamGreen 0:3b00827bb0b7 644 * \param[in] p the MAC packet to send (e.g. IP packet including MAC addresses and type)
AdamGreen 0:3b00827bb0b7 645 * \return ERR_OK if the packet could be sent or an err_t value if the packet couldn't be sent
AdamGreen 0:3b00827bb0b7 646 */
AdamGreen 0:3b00827bb0b7 647 static err_t lpc_low_level_output(struct netif *netif, struct pbuf *p)
AdamGreen 0:3b00827bb0b7 648 {
AdamGreen 0:3b00827bb0b7 649 struct lpc_enetdata *lpc_enetif = netif->state;
AdamGreen 0:3b00827bb0b7 650 struct pbuf *q;
AdamGreen 0:3b00827bb0b7 651 u8_t *dst;
AdamGreen 0:3b00827bb0b7 652 u32_t idx, notdmasafe = 0;
AdamGreen 0:3b00827bb0b7 653 struct pbuf *np;
AdamGreen 0:3b00827bb0b7 654 s32_t dn;
AdamGreen 0:3b00827bb0b7 655
AdamGreen 0:3b00827bb0b7 656 /* Zero-copy TX buffers may be fragmented across mutliple payload
AdamGreen 0:3b00827bb0b7 657 chains. Determine the number of descriptors needed for the
AdamGreen 0:3b00827bb0b7 658 transfer. The pbuf chaining can be a mess! */
AdamGreen 0:3b00827bb0b7 659 dn = (s32_t) pbuf_clen(p);
AdamGreen 0:3b00827bb0b7 660
AdamGreen 0:3b00827bb0b7 661 /* Test to make sure packet addresses are DMA safe. A DMA safe
AdamGreen 0:3b00827bb0b7 662 address is once that uses external memory or periphheral RAM.
AdamGreen 0:3b00827bb0b7 663 IRAM and FLASH are not safe! */
AdamGreen 0:3b00827bb0b7 664 for (q = p; q != NULL; q = q->next)
AdamGreen 0:3b00827bb0b7 665 notdmasafe += lpc_packet_addr_notsafe(q->payload);
AdamGreen 0:3b00827bb0b7 666
AdamGreen 0:3b00827bb0b7 667 #if LPC_TX_PBUF_BOUNCE_EN==1
AdamGreen 0:3b00827bb0b7 668 /* If the pbuf is not DMA safe, a new bounce buffer (pbuf) will be
AdamGreen 0:3b00827bb0b7 669 created that will be used instead. This requires an copy from the
AdamGreen 0:3b00827bb0b7 670 non-safe DMA region to the new pbuf */
AdamGreen 0:3b00827bb0b7 671 if (notdmasafe) {
AdamGreen 0:3b00827bb0b7 672 /* Allocate a pbuf in DMA memory */
AdamGreen 0:3b00827bb0b7 673 np = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
AdamGreen 0:3b00827bb0b7 674 if (np == NULL)
AdamGreen 0:3b00827bb0b7 675 return ERR_MEM;
AdamGreen 0:3b00827bb0b7 676
AdamGreen 0:3b00827bb0b7 677 /* This buffer better be contiguous! */
AdamGreen 0:3b00827bb0b7 678 LWIP_ASSERT("lpc_low_level_output: New transmit pbuf is chained",
AdamGreen 0:3b00827bb0b7 679 (pbuf_clen(np) == 1));
AdamGreen 0:3b00827bb0b7 680
AdamGreen 0:3b00827bb0b7 681 /* Copy to DMA safe pbuf */
AdamGreen 0:3b00827bb0b7 682 dst = (u8_t *) np->payload;
AdamGreen 0:3b00827bb0b7 683 for(q = p; q != NULL; q = q->next) {
AdamGreen 0:3b00827bb0b7 684 /* Copy the buffer to the descriptor's buffer */
AdamGreen 0:3b00827bb0b7 685 MEMCPY(dst, (u8_t *) q->payload, q->len);
AdamGreen 0:3b00827bb0b7 686 dst += q->len;
AdamGreen 0:3b00827bb0b7 687 }
AdamGreen 0:3b00827bb0b7 688 np->len = p->tot_len;
AdamGreen 0:3b00827bb0b7 689
AdamGreen 0:3b00827bb0b7 690 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
AdamGreen 0:3b00827bb0b7 691 ("lpc_low_level_output: Switched to DMA safe buffer, old=%p, new=%p\n",
AdamGreen 0:3b00827bb0b7 692 q, np));
AdamGreen 0:3b00827bb0b7 693
AdamGreen 0:3b00827bb0b7 694 /* use the new buffer for descrptor queueing. The original pbuf will
AdamGreen 0:3b00827bb0b7 695 be de-allocated outsuide this driver. */
AdamGreen 0:3b00827bb0b7 696 p = np;
AdamGreen 0:3b00827bb0b7 697 dn = 1;
AdamGreen 0:3b00827bb0b7 698 }
AdamGreen 0:3b00827bb0b7 699 #else
AdamGreen 0:3b00827bb0b7 700 if (notdmasafe)
AdamGreen 0:3b00827bb0b7 701 LWIP_ASSERT("lpc_low_level_output: Not a DMA safe pbuf",
AdamGreen 0:3b00827bb0b7 702 (notdmasafe == 0));
AdamGreen 0:3b00827bb0b7 703 #endif
AdamGreen 0:3b00827bb0b7 704
AdamGreen 0:3b00827bb0b7 705 /* Wait until enough descriptors are available for the transfer. */
AdamGreen 0:3b00827bb0b7 706 /* THIS WILL BLOCK UNTIL THERE ARE ENOUGH DESCRIPTORS AVAILABLE */
AdamGreen 0:3b00827bb0b7 707 while (dn > lpc_tx_ready(netif))
AdamGreen 0:3b00827bb0b7 708 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 709 osSemaphoreWait(lpc_enetif->xTXDCountSem.id, osWaitForever);
AdamGreen 0:3b00827bb0b7 710 #else
AdamGreen 0:3b00827bb0b7 711 osDelay(1);
AdamGreen 0:3b00827bb0b7 712 #endif
AdamGreen 0:3b00827bb0b7 713
AdamGreen 0:3b00827bb0b7 714 /* Get free TX buffer index */
AdamGreen 0:3b00827bb0b7 715 idx = LPC_EMAC->TxProduceIndex;
AdamGreen 0:3b00827bb0b7 716
AdamGreen 0:3b00827bb0b7 717 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 718 /* Get exclusive access */
AdamGreen 0:3b00827bb0b7 719 sys_mutex_lock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 720 #endif
AdamGreen 0:3b00827bb0b7 721
AdamGreen 0:3b00827bb0b7 722 /* Prevent LWIP from de-allocating this pbuf. The driver will
AdamGreen 0:3b00827bb0b7 723 free it once it's been transmitted. */
AdamGreen 0:3b00827bb0b7 724 if (!notdmasafe)
AdamGreen 0:3b00827bb0b7 725 pbuf_ref(p);
AdamGreen 0:3b00827bb0b7 726
AdamGreen 0:3b00827bb0b7 727 /* Setup transfers */
AdamGreen 0:3b00827bb0b7 728 q = p;
AdamGreen 0:3b00827bb0b7 729 while (dn > 0) {
AdamGreen 0:3b00827bb0b7 730 dn--;
AdamGreen 0:3b00827bb0b7 731
AdamGreen 0:3b00827bb0b7 732 /* Only save pointer to free on last descriptor */
AdamGreen 0:3b00827bb0b7 733 if (dn == 0) {
AdamGreen 0:3b00827bb0b7 734 /* Save size of packet and signal it's ready */
AdamGreen 0:3b00827bb0b7 735 lpc_enetif->ptxd[idx].control = (q->len - 1) | EMAC_TCTRL_INT |
AdamGreen 0:3b00827bb0b7 736 EMAC_TCTRL_LAST;
AdamGreen 0:3b00827bb0b7 737 lpc_enetif->txb[idx] = p;
AdamGreen 0:3b00827bb0b7 738 }
AdamGreen 0:3b00827bb0b7 739 else {
AdamGreen 0:3b00827bb0b7 740 /* Save size of packet, descriptor is not last */
AdamGreen 0:3b00827bb0b7 741 lpc_enetif->ptxd[idx].control = (q->len - 1) | EMAC_TCTRL_INT;
AdamGreen 0:3b00827bb0b7 742 lpc_enetif->txb[idx] = NULL;
AdamGreen 0:3b00827bb0b7 743 }
AdamGreen 0:3b00827bb0b7 744
AdamGreen 0:3b00827bb0b7 745 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
AdamGreen 0:3b00827bb0b7 746 ("lpc_low_level_output: pbuf packet(%p) sent, chain#=%d,"
AdamGreen 0:3b00827bb0b7 747 " size = %d (index=%d)\n", q->payload, dn, q->len, idx));
AdamGreen 0:3b00827bb0b7 748
AdamGreen 0:3b00827bb0b7 749 lpc_enetif->ptxd[idx].packet = (u32_t) q->payload;
AdamGreen 0:3b00827bb0b7 750
AdamGreen 0:3b00827bb0b7 751 q = q->next;
AdamGreen 0:3b00827bb0b7 752
AdamGreen 0:3b00827bb0b7 753 idx++;
AdamGreen 0:3b00827bb0b7 754 if (idx >= LPC_NUM_BUFF_TXDESCS)
AdamGreen 0:3b00827bb0b7 755 idx = 0;
AdamGreen 0:3b00827bb0b7 756 }
AdamGreen 0:3b00827bb0b7 757
AdamGreen 0:3b00827bb0b7 758 LPC_EMAC->TxProduceIndex = idx;
AdamGreen 0:3b00827bb0b7 759
AdamGreen 0:3b00827bb0b7 760 LINK_STATS_INC(link.xmit);
AdamGreen 0:3b00827bb0b7 761
AdamGreen 0:3b00827bb0b7 762 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 763 /* Restore access */
AdamGreen 0:3b00827bb0b7 764 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 765 #endif
AdamGreen 0:3b00827bb0b7 766
AdamGreen 0:3b00827bb0b7 767 return ERR_OK;
AdamGreen 0:3b00827bb0b7 768 }
AdamGreen 0:3b00827bb0b7 769
AdamGreen 0:3b00827bb0b7 770 /** \brief LPC EMAC interrupt handler.
AdamGreen 0:3b00827bb0b7 771 *
AdamGreen 0:3b00827bb0b7 772 * This function handles the transmit, receive, and error interrupt of
AdamGreen 0:3b00827bb0b7 773 * the LPC177x_8x. This is meant to be used when NO_SYS=0.
AdamGreen 0:3b00827bb0b7 774 */
AdamGreen 0:3b00827bb0b7 775 void ENET_IRQHandler(void)
AdamGreen 0:3b00827bb0b7 776 {
AdamGreen 0:3b00827bb0b7 777 #if NO_SYS == 1
AdamGreen 0:3b00827bb0b7 778 /* Interrupts are not used without an RTOS */
AdamGreen 0:3b00827bb0b7 779 NVIC_DisableIRQ(ENET_IRQn);
AdamGreen 0:3b00827bb0b7 780 #else
AdamGreen 0:3b00827bb0b7 781 uint32_t ints;
AdamGreen 0:3b00827bb0b7 782
AdamGreen 0:3b00827bb0b7 783 /* Interrupts are of 2 groups - transmit or receive. Based on the
AdamGreen 0:3b00827bb0b7 784 interrupt, kick off the receive or transmit (cleanup) task */
AdamGreen 0:3b00827bb0b7 785
AdamGreen 0:3b00827bb0b7 786 /* Get pending interrupts */
AdamGreen 0:3b00827bb0b7 787 ints = LPC_EMAC->IntStatus;
AdamGreen 0:3b00827bb0b7 788
AdamGreen 0:3b00827bb0b7 789 if (ints & RXINTGROUP) {
AdamGreen 0:3b00827bb0b7 790 /* RX group interrupt(s): Give signal to wakeup RX receive task.*/
AdamGreen 0:3b00827bb0b7 791 osSignalSet(lpc_enetdata.RxThread->id, RX_SIGNAL);
AdamGreen 0:3b00827bb0b7 792 }
AdamGreen 0:3b00827bb0b7 793
AdamGreen 0:3b00827bb0b7 794 if (ints & TXINTGROUP) {
AdamGreen 0:3b00827bb0b7 795 /* TX group interrupt(s): Give semaphore to wakeup TX cleanup task. */
AdamGreen 0:3b00827bb0b7 796 sys_sem_signal(&lpc_enetdata.TxCleanSem);
AdamGreen 0:3b00827bb0b7 797 }
AdamGreen 0:3b00827bb0b7 798
AdamGreen 0:3b00827bb0b7 799 /* Clear pending interrupts */
AdamGreen 0:3b00827bb0b7 800 LPC_EMAC->IntClear = ints;
AdamGreen 0:3b00827bb0b7 801 #endif
AdamGreen 0:3b00827bb0b7 802 }
AdamGreen 0:3b00827bb0b7 803
AdamGreen 0:3b00827bb0b7 804 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 805 /** \brief Packet reception task
AdamGreen 0:3b00827bb0b7 806 *
AdamGreen 0:3b00827bb0b7 807 * This task is called when a packet is received. It will
AdamGreen 0:3b00827bb0b7 808 * pass the packet to the LWIP core.
AdamGreen 0:3b00827bb0b7 809 *
AdamGreen 0:3b00827bb0b7 810 * \param[in] pvParameters Not used yet
AdamGreen 0:3b00827bb0b7 811 */
AdamGreen 0:3b00827bb0b7 812 static void packet_rx(void* pvParameters) {
AdamGreen 0:3b00827bb0b7 813 struct lpc_enetdata *lpc_enetif = pvParameters;
AdamGreen 0:3b00827bb0b7 814
AdamGreen 0:3b00827bb0b7 815 while (1) {
AdamGreen 0:3b00827bb0b7 816 /* Wait for receive task to wakeup */
AdamGreen 0:3b00827bb0b7 817 osSignalWait(RX_SIGNAL, osWaitForever);
AdamGreen 0:3b00827bb0b7 818
AdamGreen 0:3b00827bb0b7 819 /* Process packets until all empty */
AdamGreen 0:3b00827bb0b7 820 while (LPC_EMAC->RxConsumeIndex != LPC_EMAC->RxProduceIndex)
AdamGreen 0:3b00827bb0b7 821 lpc_enetif_input(lpc_enetif->netif);
AdamGreen 0:3b00827bb0b7 822 }
AdamGreen 0:3b00827bb0b7 823 }
AdamGreen 0:3b00827bb0b7 824
AdamGreen 0:3b00827bb0b7 825 /** \brief Transmit cleanup task
AdamGreen 0:3b00827bb0b7 826 *
AdamGreen 0:3b00827bb0b7 827 * This task is called when a transmit interrupt occurs and
AdamGreen 0:3b00827bb0b7 828 * reclaims the pbuf and descriptor used for the packet once
AdamGreen 0:3b00827bb0b7 829 * the packet has been transferred.
AdamGreen 0:3b00827bb0b7 830 *
AdamGreen 0:3b00827bb0b7 831 * \param[in] pvParameters Not used yet
AdamGreen 0:3b00827bb0b7 832 */
AdamGreen 0:3b00827bb0b7 833 static void packet_tx(void* pvParameters) {
AdamGreen 0:3b00827bb0b7 834 struct lpc_enetdata *lpc_enetif = pvParameters;
AdamGreen 0:3b00827bb0b7 835 s32_t idx;
AdamGreen 0:3b00827bb0b7 836
AdamGreen 0:3b00827bb0b7 837 while (1) {
AdamGreen 0:3b00827bb0b7 838 /* Wait for transmit cleanup task to wakeup */
AdamGreen 0:3b00827bb0b7 839 sys_arch_sem_wait(&lpc_enetif->TxCleanSem, 0);
AdamGreen 0:3b00827bb0b7 840
AdamGreen 0:3b00827bb0b7 841 /* Error handling for TX underruns. This should never happen unless
AdamGreen 0:3b00827bb0b7 842 something is holding the bus or the clocks are going too slow. It
AdamGreen 0:3b00827bb0b7 843 can probably be safely removed. */
AdamGreen 0:3b00827bb0b7 844 if (LPC_EMAC->IntStatus & EMAC_INT_TX_UNDERRUN) {
AdamGreen 0:3b00827bb0b7 845 LINK_STATS_INC(link.err);
AdamGreen 0:3b00827bb0b7 846 LINK_STATS_INC(link.drop);
AdamGreen 0:3b00827bb0b7 847
AdamGreen 0:3b00827bb0b7 848 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 849 /* Get exclusive access */
AdamGreen 0:3b00827bb0b7 850 sys_mutex_lock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 851 #endif
AdamGreen 0:3b00827bb0b7 852 /* Reset the TX side */
AdamGreen 0:3b00827bb0b7 853 LPC_EMAC->MAC1 |= EMAC_MAC1_RES_TX;
AdamGreen 0:3b00827bb0b7 854 LPC_EMAC->IntClear = EMAC_INT_TX_UNDERRUN;
AdamGreen 0:3b00827bb0b7 855
AdamGreen 0:3b00827bb0b7 856 /* De-allocate all queued TX pbufs */
AdamGreen 0:3b00827bb0b7 857 for (idx = 0; idx < LPC_NUM_BUFF_TXDESCS; idx++) {
AdamGreen 0:3b00827bb0b7 858 if (lpc_enetif->txb[idx] != NULL) {
AdamGreen 0:3b00827bb0b7 859 pbuf_free(lpc_enetif->txb[idx]);
AdamGreen 0:3b00827bb0b7 860 lpc_enetif->txb[idx] = NULL;
AdamGreen 0:3b00827bb0b7 861 }
AdamGreen 0:3b00827bb0b7 862 }
AdamGreen 0:3b00827bb0b7 863
AdamGreen 0:3b00827bb0b7 864 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 865 /* Restore access */
AdamGreen 0:3b00827bb0b7 866 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
AdamGreen 0:3b00827bb0b7 867 #endif
AdamGreen 0:3b00827bb0b7 868 /* Start TX side again */
AdamGreen 0:3b00827bb0b7 869 lpc_tx_setup(lpc_enetif);
AdamGreen 0:3b00827bb0b7 870 } else {
AdamGreen 0:3b00827bb0b7 871 /* Free TX buffers that are done sending */
AdamGreen 0:3b00827bb0b7 872 lpc_tx_reclaim(lpc_enetdata.netif);
AdamGreen 0:3b00827bb0b7 873 }
AdamGreen 0:3b00827bb0b7 874 }
AdamGreen 0:3b00827bb0b7 875 }
AdamGreen 0:3b00827bb0b7 876 #endif
AdamGreen 0:3b00827bb0b7 877
AdamGreen 0:3b00827bb0b7 878 /** \brief Low level init of the MAC and PHY.
AdamGreen 0:3b00827bb0b7 879 *
AdamGreen 0:3b00827bb0b7 880 * \param[in] netif Pointer to LWIP netif structure
AdamGreen 0:3b00827bb0b7 881 */
AdamGreen 0:3b00827bb0b7 882 static err_t low_level_init(struct netif *netif)
AdamGreen 0:3b00827bb0b7 883 {
AdamGreen 0:3b00827bb0b7 884 struct lpc_enetdata *lpc_enetif = netif->state;
AdamGreen 0:3b00827bb0b7 885 err_t err = ERR_OK;
AdamGreen 0:3b00827bb0b7 886
AdamGreen 0:3b00827bb0b7 887 /* Enable MII clocking */
AdamGreen 0:3b00827bb0b7 888 LPC_SC->PCONP |= CLKPWR_PCONP_PCENET;
AdamGreen 0:3b00827bb0b7 889
AdamGreen 0:3b00827bb0b7 890 #if defined(TARGET_LPC1768)
AdamGreen 0:3b00827bb0b7 891 LPC_PINCON->PINSEL2 = 0x50150105; /* Enable P1 Ethernet Pins. */
AdamGreen 0:3b00827bb0b7 892 LPC_PINCON->PINSEL3 = (LPC_PINCON->PINSEL3 & ~0x0000000F) | 0x00000005;
AdamGreen 0:3b00827bb0b7 893 #elif defined(TARGET_LPC4088)
AdamGreen 0:3b00827bb0b7 894 LPC_IOCON->P1_0 &= ~0x07; /* ENET I/O config */
AdamGreen 0:3b00827bb0b7 895 LPC_IOCON->P1_0 |= 0x01; /* ENET_TXD0 */
AdamGreen 0:3b00827bb0b7 896 LPC_IOCON->P1_1 &= ~0x07;
AdamGreen 0:3b00827bb0b7 897 LPC_IOCON->P1_1 |= 0x01; /* ENET_TXD1 */
AdamGreen 0:3b00827bb0b7 898 LPC_IOCON->P1_4 &= ~0x07;
AdamGreen 0:3b00827bb0b7 899 LPC_IOCON->P1_4 |= 0x01; /* ENET_TXEN */
AdamGreen 0:3b00827bb0b7 900 LPC_IOCON->P1_8 &= ~0x07;
AdamGreen 0:3b00827bb0b7 901 LPC_IOCON->P1_8 |= 0x01; /* ENET_CRS */
AdamGreen 0:3b00827bb0b7 902 LPC_IOCON->P1_9 &= ~0x07;
AdamGreen 0:3b00827bb0b7 903 LPC_IOCON->P1_9 |= 0x01; /* ENET_RXD0 */
AdamGreen 0:3b00827bb0b7 904 LPC_IOCON->P1_10 &= ~0x07;
AdamGreen 0:3b00827bb0b7 905 LPC_IOCON->P1_10 |= 0x01; /* ENET_RXD1 */
AdamGreen 0:3b00827bb0b7 906 LPC_IOCON->P1_14 &= ~0x07;
AdamGreen 0:3b00827bb0b7 907 LPC_IOCON->P1_14 |= 0x01; /* ENET_RX_ER */
AdamGreen 0:3b00827bb0b7 908 LPC_IOCON->P1_15 &= ~0x07;
AdamGreen 0:3b00827bb0b7 909 LPC_IOCON->P1_15 |= 0x01; /* ENET_REF_CLK */
AdamGreen 0:3b00827bb0b7 910 LPC_IOCON->P1_16 &= ~0x07; /* ENET/PHY I/O config */
AdamGreen 0:3b00827bb0b7 911 LPC_IOCON->P1_16 |= 0x01; /* ENET_MDC */
AdamGreen 0:3b00827bb0b7 912 LPC_IOCON->P1_17 &= ~0x07;
AdamGreen 0:3b00827bb0b7 913 LPC_IOCON->P1_17 |= 0x01; /* ENET_MDIO */
AdamGreen 0:3b00827bb0b7 914 #endif
AdamGreen 0:3b00827bb0b7 915
AdamGreen 0:3b00827bb0b7 916 /* Reset all MAC logic */
AdamGreen 0:3b00827bb0b7 917 LPC_EMAC->MAC1 = EMAC_MAC1_RES_TX | EMAC_MAC1_RES_MCS_TX |
AdamGreen 0:3b00827bb0b7 918 EMAC_MAC1_RES_RX | EMAC_MAC1_RES_MCS_RX | EMAC_MAC1_SIM_RES |
AdamGreen 0:3b00827bb0b7 919 EMAC_MAC1_SOFT_RES;
AdamGreen 0:3b00827bb0b7 920 LPC_EMAC->Command = EMAC_CR_REG_RES | EMAC_CR_TX_RES | EMAC_CR_RX_RES |
AdamGreen 0:3b00827bb0b7 921 EMAC_CR_PASS_RUNT_FRM;
AdamGreen 0:3b00827bb0b7 922 osDelay(10);
AdamGreen 0:3b00827bb0b7 923
AdamGreen 0:3b00827bb0b7 924 /* Initial MAC initialization */
AdamGreen 0:3b00827bb0b7 925 LPC_EMAC->MAC1 = EMAC_MAC1_PASS_ALL;
AdamGreen 0:3b00827bb0b7 926 LPC_EMAC->MAC2 = EMAC_MAC2_CRC_EN | EMAC_MAC2_PAD_EN |
AdamGreen 0:3b00827bb0b7 927 EMAC_MAC2_VLAN_PAD_EN;
AdamGreen 0:3b00827bb0b7 928 LPC_EMAC->MAXF = EMAC_ETH_MAX_FLEN;
AdamGreen 0:3b00827bb0b7 929
AdamGreen 0:3b00827bb0b7 930 /* Set RMII management clock rate to lowest speed */
AdamGreen 0:3b00827bb0b7 931 LPC_EMAC->MCFG = EMAC_MCFG_CLK_SEL(11) | EMAC_MCFG_RES_MII;
AdamGreen 0:3b00827bb0b7 932 LPC_EMAC->MCFG &= ~EMAC_MCFG_RES_MII;
AdamGreen 0:3b00827bb0b7 933
AdamGreen 0:3b00827bb0b7 934 /* Maximum number of retries, 0x37 collision window, gap */
AdamGreen 0:3b00827bb0b7 935 LPC_EMAC->CLRT = EMAC_CLRT_DEF;
AdamGreen 0:3b00827bb0b7 936 LPC_EMAC->IPGR = EMAC_IPGR_P1_DEF | EMAC_IPGR_P2_DEF;
AdamGreen 0:3b00827bb0b7 937
AdamGreen 0:3b00827bb0b7 938 #if LPC_EMAC_RMII
AdamGreen 0:3b00827bb0b7 939 /* RMII setup */
AdamGreen 0:3b00827bb0b7 940 LPC_EMAC->Command = EMAC_CR_PASS_RUNT_FRM | EMAC_CR_RMII;
AdamGreen 0:3b00827bb0b7 941 #else
AdamGreen 0:3b00827bb0b7 942 /* MII setup */
AdamGreen 0:3b00827bb0b7 943 LPC_EMAC->CR = EMAC_CR_PASS_RUNT_FRM;
AdamGreen 0:3b00827bb0b7 944 #endif
AdamGreen 0:3b00827bb0b7 945
AdamGreen 0:3b00827bb0b7 946 /* Initialize the PHY and reset */
AdamGreen 0:3b00827bb0b7 947 err = lpc_phy_init(netif, LPC_EMAC_RMII);
AdamGreen 0:3b00827bb0b7 948 if (err != ERR_OK)
AdamGreen 0:3b00827bb0b7 949 return err;
AdamGreen 0:3b00827bb0b7 950
AdamGreen 0:3b00827bb0b7 951 /* Save station address */
AdamGreen 0:3b00827bb0b7 952 LPC_EMAC->SA2 = (u32_t) netif->hwaddr[0] |
AdamGreen 0:3b00827bb0b7 953 (((u32_t) netif->hwaddr[1]) << 8);
AdamGreen 0:3b00827bb0b7 954 LPC_EMAC->SA1 = (u32_t) netif->hwaddr[2] |
AdamGreen 0:3b00827bb0b7 955 (((u32_t) netif->hwaddr[3]) << 8);
AdamGreen 0:3b00827bb0b7 956 LPC_EMAC->SA0 = (u32_t) netif->hwaddr[4] |
AdamGreen 0:3b00827bb0b7 957 (((u32_t) netif->hwaddr[5]) << 8);
AdamGreen 0:3b00827bb0b7 958
AdamGreen 0:3b00827bb0b7 959 /* Setup transmit and receive descriptors */
AdamGreen 0:3b00827bb0b7 960 if (lpc_tx_setup(lpc_enetif) != ERR_OK)
AdamGreen 0:3b00827bb0b7 961 return ERR_BUF;
AdamGreen 0:3b00827bb0b7 962 if (lpc_rx_setup(lpc_enetif) != ERR_OK)
AdamGreen 0:3b00827bb0b7 963 return ERR_BUF;
AdamGreen 0:3b00827bb0b7 964
AdamGreen 0:3b00827bb0b7 965 /* Enable packet reception */
AdamGreen 0:3b00827bb0b7 966 #if IP_SOF_BROADCAST_RECV
AdamGreen 0:3b00827bb0b7 967 LPC_EMAC->RxFilterCtrl = EMAC_RFC_PERFECT_EN | EMAC_RFC_BCAST_EN | EMAC_RFC_MCAST_EN;
AdamGreen 0:3b00827bb0b7 968 #else
AdamGreen 0:3b00827bb0b7 969 LPC_EMAC->RxFilterCtrl = EMAC_RFC_PERFECT_EN;
AdamGreen 0:3b00827bb0b7 970 #endif
AdamGreen 0:3b00827bb0b7 971
AdamGreen 0:3b00827bb0b7 972 /* Clear and enable rx/tx interrupts */
AdamGreen 0:3b00827bb0b7 973 LPC_EMAC->IntClear = 0xFFFF;
AdamGreen 0:3b00827bb0b7 974 LPC_EMAC->IntEnable = RXINTGROUP | TXINTGROUP;
AdamGreen 0:3b00827bb0b7 975
AdamGreen 0:3b00827bb0b7 976 /* Enable RX and TX */
AdamGreen 0:3b00827bb0b7 977 LPC_EMAC->Command |= EMAC_CR_RX_EN | EMAC_CR_TX_EN;
AdamGreen 0:3b00827bb0b7 978 LPC_EMAC->MAC1 |= EMAC_MAC1_REC_EN;
AdamGreen 0:3b00827bb0b7 979
AdamGreen 0:3b00827bb0b7 980 return err;
AdamGreen 0:3b00827bb0b7 981 }
AdamGreen 0:3b00827bb0b7 982
AdamGreen 0:3b00827bb0b7 983 /* This function provides a method for the PHY to setup the EMAC
AdamGreen 0:3b00827bb0b7 984 for the PHY negotiated duplex mode */
AdamGreen 0:3b00827bb0b7 985 void lpc_emac_set_duplex(int full_duplex)
AdamGreen 0:3b00827bb0b7 986 {
AdamGreen 0:3b00827bb0b7 987 if (full_duplex) {
AdamGreen 0:3b00827bb0b7 988 LPC_EMAC->MAC2 |= EMAC_MAC2_FULL_DUP;
AdamGreen 0:3b00827bb0b7 989 LPC_EMAC->Command |= EMAC_CR_FULL_DUP;
AdamGreen 0:3b00827bb0b7 990 LPC_EMAC->IPGT = EMAC_IPGT_FULL_DUP;
AdamGreen 0:3b00827bb0b7 991 } else {
AdamGreen 0:3b00827bb0b7 992 LPC_EMAC->MAC2 &= ~EMAC_MAC2_FULL_DUP;
AdamGreen 0:3b00827bb0b7 993 LPC_EMAC->Command &= ~EMAC_CR_FULL_DUP;
AdamGreen 0:3b00827bb0b7 994 LPC_EMAC->IPGT = EMAC_IPGT_HALF_DUP;
AdamGreen 0:3b00827bb0b7 995 }
AdamGreen 0:3b00827bb0b7 996 }
AdamGreen 0:3b00827bb0b7 997
AdamGreen 0:3b00827bb0b7 998 /* This function provides a method for the PHY to setup the EMAC
AdamGreen 0:3b00827bb0b7 999 for the PHY negotiated bit rate */
AdamGreen 0:3b00827bb0b7 1000 void lpc_emac_set_speed(int mbs_100)
AdamGreen 0:3b00827bb0b7 1001 {
AdamGreen 0:3b00827bb0b7 1002 if (mbs_100)
AdamGreen 0:3b00827bb0b7 1003 LPC_EMAC->SUPP = EMAC_SUPP_SPEED;
AdamGreen 0:3b00827bb0b7 1004 else
AdamGreen 0:3b00827bb0b7 1005 LPC_EMAC->SUPP = 0;
AdamGreen 0:3b00827bb0b7 1006 }
AdamGreen 0:3b00827bb0b7 1007
AdamGreen 0:3b00827bb0b7 1008 /**
AdamGreen 0:3b00827bb0b7 1009 * This function is the ethernet packet send function. It calls
AdamGreen 0:3b00827bb0b7 1010 * etharp_output after checking link status.
AdamGreen 0:3b00827bb0b7 1011 *
AdamGreen 0:3b00827bb0b7 1012 * \param[in] netif the lwip network interface structure for this lpc_enetif
AdamGreen 0:3b00827bb0b7 1013 * \param[in] q Pointer to pbug to send
AdamGreen 0:3b00827bb0b7 1014 * \param[in] ipaddr IP address
AdamGreen 0:3b00827bb0b7 1015 * \return ERR_OK or error code
AdamGreen 0:3b00827bb0b7 1016 */
AdamGreen 0:3b00827bb0b7 1017 err_t lpc_etharp_output(struct netif *netif, struct pbuf *q,
AdamGreen 0:3b00827bb0b7 1018 ip_addr_t *ipaddr)
AdamGreen 0:3b00827bb0b7 1019 {
AdamGreen 0:3b00827bb0b7 1020 /* Only send packet is link is up */
AdamGreen 0:3b00827bb0b7 1021 if (netif->flags & NETIF_FLAG_LINK_UP)
AdamGreen 0:3b00827bb0b7 1022 return etharp_output(netif, q, ipaddr);
AdamGreen 0:3b00827bb0b7 1023
AdamGreen 0:3b00827bb0b7 1024 return ERR_CONN;
AdamGreen 0:3b00827bb0b7 1025 }
AdamGreen 0:3b00827bb0b7 1026
AdamGreen 0:3b00827bb0b7 1027 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 1028 /* periodic PHY status update */
AdamGreen 0:3b00827bb0b7 1029 void phy_update(void const *nif) {
AdamGreen 0:3b00827bb0b7 1030 lpc_phy_sts_sm((struct netif*)nif);
AdamGreen 0:3b00827bb0b7 1031 }
AdamGreen 0:3b00827bb0b7 1032 osTimerDef(phy_update, phy_update);
AdamGreen 0:3b00827bb0b7 1033 #endif
AdamGreen 0:3b00827bb0b7 1034
AdamGreen 0:3b00827bb0b7 1035 /**
AdamGreen 0:3b00827bb0b7 1036 * Should be called at the beginning of the program to set up the
AdamGreen 0:3b00827bb0b7 1037 * network interface.
AdamGreen 0:3b00827bb0b7 1038 *
AdamGreen 0:3b00827bb0b7 1039 * This function should be passed as a parameter to netif_add().
AdamGreen 0:3b00827bb0b7 1040 *
AdamGreen 0:3b00827bb0b7 1041 * @param[in] netif the lwip network interface structure for this lpc_enetif
AdamGreen 0:3b00827bb0b7 1042 * @return ERR_OK if the loopif is initialized
AdamGreen 0:3b00827bb0b7 1043 * ERR_MEM if private data couldn't be allocated
AdamGreen 0:3b00827bb0b7 1044 * any other err_t on error
AdamGreen 0:3b00827bb0b7 1045 */
AdamGreen 0:3b00827bb0b7 1046 err_t lpc_enetif_init(struct netif *netif)
AdamGreen 0:3b00827bb0b7 1047 {
AdamGreen 0:3b00827bb0b7 1048 err_t err;
AdamGreen 0:3b00827bb0b7 1049
AdamGreen 0:3b00827bb0b7 1050 LWIP_ASSERT("netif != NULL", (netif != NULL));
AdamGreen 0:3b00827bb0b7 1051
AdamGreen 0:3b00827bb0b7 1052 lpc_enetdata.netif = netif;
AdamGreen 0:3b00827bb0b7 1053
AdamGreen 0:3b00827bb0b7 1054 /* set MAC hardware address */
AdamGreen 0:3b00827bb0b7 1055 #if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
AdamGreen 0:3b00827bb0b7 1056 netif->hwaddr[0] = MBED_MAC_ADDR_0;
AdamGreen 0:3b00827bb0b7 1057 netif->hwaddr[1] = MBED_MAC_ADDR_1;
AdamGreen 0:3b00827bb0b7 1058 netif->hwaddr[2] = MBED_MAC_ADDR_2;
AdamGreen 0:3b00827bb0b7 1059 netif->hwaddr[3] = MBED_MAC_ADDR_3;
AdamGreen 0:3b00827bb0b7 1060 netif->hwaddr[4] = MBED_MAC_ADDR_4;
AdamGreen 0:3b00827bb0b7 1061 netif->hwaddr[5] = MBED_MAC_ADDR_5;
AdamGreen 0:3b00827bb0b7 1062 #else
AdamGreen 0:3b00827bb0b7 1063 mbed_mac_address((char *)netif->hwaddr);
AdamGreen 0:3b00827bb0b7 1064 #endif
AdamGreen 0:3b00827bb0b7 1065 netif->hwaddr_len = ETHARP_HWADDR_LEN;
AdamGreen 0:3b00827bb0b7 1066
AdamGreen 0:3b00827bb0b7 1067 /* maximum transfer unit */
AdamGreen 0:3b00827bb0b7 1068 netif->mtu = 1500;
AdamGreen 0:3b00827bb0b7 1069
AdamGreen 0:3b00827bb0b7 1070 /* device capabilities */
AdamGreen 0:3b00827bb0b7 1071 netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET | NETIF_FLAG_IGMP;
AdamGreen 0:3b00827bb0b7 1072
AdamGreen 0:3b00827bb0b7 1073 /* Initialize the hardware */
AdamGreen 0:3b00827bb0b7 1074 netif->state = &lpc_enetdata;
AdamGreen 0:3b00827bb0b7 1075 err = low_level_init(netif);
AdamGreen 0:3b00827bb0b7 1076 if (err != ERR_OK)
AdamGreen 0:3b00827bb0b7 1077 return err;
AdamGreen 0:3b00827bb0b7 1078
AdamGreen 0:3b00827bb0b7 1079 #if LWIP_NETIF_HOSTNAME
AdamGreen 0:3b00827bb0b7 1080 /* Initialize interface hostname */
AdamGreen 0:3b00827bb0b7 1081 netif->hostname = "lwiplpc";
AdamGreen 0:3b00827bb0b7 1082 #endif /* LWIP_NETIF_HOSTNAME */
AdamGreen 0:3b00827bb0b7 1083
AdamGreen 0:3b00827bb0b7 1084 netif->name[0] = 'e';
AdamGreen 0:3b00827bb0b7 1085 netif->name[1] = 'n';
AdamGreen 0:3b00827bb0b7 1086
AdamGreen 0:3b00827bb0b7 1087 netif->output = lpc_etharp_output;
AdamGreen 0:3b00827bb0b7 1088 netif->linkoutput = lpc_low_level_output;
AdamGreen 0:3b00827bb0b7 1089
AdamGreen 0:3b00827bb0b7 1090 /* CMSIS-RTOS, start tasks */
AdamGreen 0:3b00827bb0b7 1091 #if NO_SYS == 0
AdamGreen 0:3b00827bb0b7 1092 #ifdef CMSIS_OS_RTX
AdamGreen 0:3b00827bb0b7 1093 memset(lpc_enetdata.xTXDCountSem.data, 0, sizeof(lpc_enetdata.xTXDCountSem.data));
AdamGreen 0:3b00827bb0b7 1094 lpc_enetdata.xTXDCountSem.def.semaphore = lpc_enetdata.xTXDCountSem.data;
AdamGreen 0:3b00827bb0b7 1095 #endif
AdamGreen 0:3b00827bb0b7 1096 lpc_enetdata.xTXDCountSem.id = osSemaphoreCreate(&lpc_enetdata.xTXDCountSem.def, LPC_NUM_BUFF_TXDESCS);
AdamGreen 0:3b00827bb0b7 1097 LWIP_ASSERT("xTXDCountSem creation error", (lpc_enetdata.xTXDCountSem.id != NULL));
AdamGreen 0:3b00827bb0b7 1098
AdamGreen 0:3b00827bb0b7 1099 err = sys_mutex_new(&lpc_enetdata.TXLockMutex);
AdamGreen 0:3b00827bb0b7 1100 LWIP_ASSERT("TXLockMutex creation error", (err == ERR_OK));
AdamGreen 0:3b00827bb0b7 1101
AdamGreen 0:3b00827bb0b7 1102 /* Packet receive task */
AdamGreen 0:3b00827bb0b7 1103 lpc_enetdata.RxThread = sys_thread_new("receive_thread", packet_rx, netif->state, DEFAULT_THREAD_STACKSIZE, RX_PRIORITY);
AdamGreen 0:3b00827bb0b7 1104 LWIP_ASSERT("RxThread creation error", (lpc_enetdata.RxThread));
AdamGreen 0:3b00827bb0b7 1105
AdamGreen 0:3b00827bb0b7 1106 /* Transmit cleanup task */
AdamGreen 0:3b00827bb0b7 1107 err = sys_sem_new(&lpc_enetdata.TxCleanSem, 0);
AdamGreen 0:3b00827bb0b7 1108 LWIP_ASSERT("TxCleanSem creation error", (err == ERR_OK));
AdamGreen 0:3b00827bb0b7 1109 sys_thread_new("txclean_thread", packet_tx, netif->state, DEFAULT_THREAD_STACKSIZE, TX_PRIORITY);
AdamGreen 0:3b00827bb0b7 1110
AdamGreen 0:3b00827bb0b7 1111 /* periodic PHY status update */
AdamGreen 0:3b00827bb0b7 1112 osTimerId phy_timer = osTimerCreate(osTimer(phy_update), osTimerPeriodic, (void *)netif);
AdamGreen 0:3b00827bb0b7 1113 osTimerStart(phy_timer, 250);
AdamGreen 0:3b00827bb0b7 1114 #endif
AdamGreen 0:3b00827bb0b7 1115
AdamGreen 0:3b00827bb0b7 1116 return ERR_OK;
AdamGreen 0:3b00827bb0b7 1117 }
AdamGreen 0:3b00827bb0b7 1118
AdamGreen 0:3b00827bb0b7 1119 /**
AdamGreen 0:3b00827bb0b7 1120 * @}
AdamGreen 0:3b00827bb0b7 1121 */
AdamGreen 0:3b00827bb0b7 1122
AdamGreen 0:3b00827bb0b7 1123 /* --------------------------------- End Of File ------------------------------ */