mbed official / lwip-eth

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Dependents:   EthernetInterface EthernetInterface EthernetInterface_RSF EthernetInterface ... more

arch/lpc17_emac.c@0:f4db29eb9e47, 2012-06-22 (annotated)

Committer:
mbed_official
Date:
Fri Jun 22 09:32:29 2012 +0000
Revision:
0:f4db29eb9e47
Child:
1:0c9d93e2f51c
Initial import from NXP lwip_lpc: http://sw.lpcware.com/index.php?p=lwip_lpc.git&a=snapshot&h=7b84446afe97af955acad1d720696a0de73ab7cf&fmt=zip

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:f4db29eb9e47 1 /**********************************************************************
mbed_official 0:f4db29eb9e47 2 * $Id$ lpc17_emac.c 2011-11-20
mbed_official 0:f4db29eb9e47 3 *//**
mbed_official 0:f4db29eb9e47 4 * @file lpc17_emac.c
mbed_official 0:f4db29eb9e47 5 * @brief LPC17 ethernet driver for LWIP
mbed_official 0:f4db29eb9e47 6 * @version 1.0
mbed_official 0:f4db29eb9e47 7 * @date 20. Nov. 2011
mbed_official 0:f4db29eb9e47 8 * @author NXP MCU SW Application Team
mbed_official 0:f4db29eb9e47 9 *
mbed_official 0:f4db29eb9e47 10 * Copyright(C) 2011, NXP Semiconductor
mbed_official 0:f4db29eb9e47 11 * All rights reserved.
mbed_official 0:f4db29eb9e47 12 *
mbed_official 0:f4db29eb9e47 13 ***********************************************************************
mbed_official 0:f4db29eb9e47 14 * Software that is described herein is for illustrative purposes only
mbed_official 0:f4db29eb9e47 15 * which provides customers with programming information regarding the
mbed_official 0:f4db29eb9e47 16 * products. This software is supplied "AS IS" without any warranties.
mbed_official 0:f4db29eb9e47 17 * NXP Semiconductors assumes no responsibility or liability for the
mbed_official 0:f4db29eb9e47 18 * use of the software, conveys no license or title under any patent,
mbed_official 0:f4db29eb9e47 19 * copyright, or mask work right to the product. NXP Semiconductors
mbed_official 0:f4db29eb9e47 20 * reserves the right to make changes in the software without
mbed_official 0:f4db29eb9e47 21 * notification. NXP Semiconductors also make no representation or
mbed_official 0:f4db29eb9e47 22 * warranty that such application will be suitable for the specified
mbed_official 0:f4db29eb9e47 23 * use without further testing or modification.
mbed_official 0:f4db29eb9e47 24 **********************************************************************/
mbed_official 0:f4db29eb9e47 25
mbed_official 0:f4db29eb9e47 26 #include "lwip/opt.h"
mbed_official 0:f4db29eb9e47 27 #include "lwip/sys.h"
mbed_official 0:f4db29eb9e47 28 #include "lwip/def.h"
mbed_official 0:f4db29eb9e47 29 #include "lwip/mem.h"
mbed_official 0:f4db29eb9e47 30 #include "lwip/pbuf.h"
mbed_official 0:f4db29eb9e47 31 #include "lwip/stats.h"
mbed_official 0:f4db29eb9e47 32 #include "lwip/snmp.h"
mbed_official 0:f4db29eb9e47 33 #include "netif/etharp.h"
mbed_official 0:f4db29eb9e47 34 #include "netif/ppp_oe.h"
mbed_official 0:f4db29eb9e47 35
mbed_official 0:f4db29eb9e47 36 #include "lpc177x_8x_emac.h"
mbed_official 0:f4db29eb9e47 37 #include "lpc177x_8x_clkpwr.h"
mbed_official 0:f4db29eb9e47 38 #include "lpc17_emac.h"
mbed_official 0:f4db29eb9e47 39 #include "lpc_emac_config.h"
mbed_official 0:f4db29eb9e47 40 #include "lpc_phy.h"
mbed_official 0:f4db29eb9e47 41
mbed_official 0:f4db29eb9e47 42 #ifndef LPC_EMAC_RMII
mbed_official 0:f4db29eb9e47 43 #error LPC_EMAC_RMII is not defined!
mbed_official 0:f4db29eb9e47 44 #endif
mbed_official 0:f4db29eb9e47 45
mbed_official 0:f4db29eb9e47 46 #if LPC_NUM_BUFF_TXDESCS < 2
mbed_official 0:f4db29eb9e47 47 #error LPC_NUM_BUFF_TXDESCS must be at least 2
mbed_official 0:f4db29eb9e47 48 #endif
mbed_official 0:f4db29eb9e47 49
mbed_official 0:f4db29eb9e47 50 #if LPC_NUM_BUFF_RXDESCS < 3
mbed_official 0:f4db29eb9e47 51 #error LPC_NUM_BUFF_RXDESCS must be at least 3
mbed_official 0:f4db29eb9e47 52 #endif
mbed_official 0:f4db29eb9e47 53
mbed_official 0:f4db29eb9e47 54 /** @defgroup lwip17xx_emac_DRIVER lpc17 EMAC driver for LWIP
mbed_official 0:f4db29eb9e47 55 * @ingroup lwip_emac
mbed_official 0:f4db29eb9e47 56 *
mbed_official 0:f4db29eb9e47 57 * @{
mbed_official 0:f4db29eb9e47 58 */
mbed_official 0:f4db29eb9e47 59
mbed_official 0:f4db29eb9e47 60 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 61 /** \brief Driver transmit and receive thread priorities
mbed_official 0:f4db29eb9e47 62 *
mbed_official 0:f4db29eb9e47 63 * Thread priorities for receive thread and TX cleanup thread. Alter
mbed_official 0:f4db29eb9e47 64 * to prioritize receive or transmit bandwidth. In a heavily loaded
mbed_official 0:f4db29eb9e47 65 * system or with LEIP_DEBUG enabled, the priorities might be better
mbed_official 0:f4db29eb9e47 66 * the same. */
mbed_official 0:f4db29eb9e47 67 #define tskRECPKT_PRIORITY (DEFAULT_THREAD_PRIO + 4)
mbed_official 0:f4db29eb9e47 68 #define tskTXCLEAN_PRIORITY (DEFAULT_THREAD_PRIO + 5)
mbed_official 0:f4db29eb9e47 69
mbed_official 0:f4db29eb9e47 70 /** \brief Debug output formatter lock define
mbed_official 0:f4db29eb9e47 71 *
mbed_official 0:f4db29eb9e47 72 * When using FreeRTOS and with LWIP_DEBUG enabled, enabling this
mbed_official 0:f4db29eb9e47 73 * define will allow RX debug messages to not interleave with the
mbed_official 0:f4db29eb9e47 74 * TX messages (so they are actually readable). Not enabling this
mbed_official 0:f4db29eb9e47 75 * define when the system is under load will cause the output to
mbed_official 0:f4db29eb9e47 76 * be unreadable. There is a small tradeoff in performance for this
mbed_official 0:f4db29eb9e47 77 * so use it only for debug. */
mbed_official 0:f4db29eb9e47 78 //#define LOCK_RX_THREAD
mbed_official 0:f4db29eb9e47 79
mbed_official 0:f4db29eb9e47 80 /** \brief Receive group interrupts
mbed_official 0:f4db29eb9e47 81 */
mbed_official 0:f4db29eb9e47 82 #define RXINTGROUP (EMAC_INT_RX_OVERRUN | EMAC_INT_RX_ERR | EMAC_INT_RX_DONE)
mbed_official 0:f4db29eb9e47 83
mbed_official 0:f4db29eb9e47 84 /** \brief Transmit group interrupts
mbed_official 0:f4db29eb9e47 85 */
mbed_official 0:f4db29eb9e47 86 #define TXINTGROUP (EMAC_INT_TX_UNDERRUN | EMAC_INT_TX_ERR | EMAC_INT_TX_DONE)
mbed_official 0:f4db29eb9e47 87 #else
mbed_official 0:f4db29eb9e47 88 #define RXINTGROUP 0
mbed_official 0:f4db29eb9e47 89 #define TXINTGROUP 0
mbed_official 0:f4db29eb9e47 90 #endif
mbed_official 0:f4db29eb9e47 91
mbed_official 0:f4db29eb9e47 92 /** \brief Structure of a TX/RX descriptor
mbed_official 0:f4db29eb9e47 93 */
mbed_official 0:f4db29eb9e47 94 typedef struct
mbed_official 0:f4db29eb9e47 95 {
mbed_official 0:f4db29eb9e47 96 volatile u32_t packet; /**< Pointer to buffer */
mbed_official 0:f4db29eb9e47 97 volatile u32_t control; /**< Control word */
mbed_official 0:f4db29eb9e47 98 } LPC_TXRX_DESC_T;
mbed_official 0:f4db29eb9e47 99
mbed_official 0:f4db29eb9e47 100 /** \brief Structure of a RX status entry
mbed_official 0:f4db29eb9e47 101 */
mbed_official 0:f4db29eb9e47 102 typedef struct
mbed_official 0:f4db29eb9e47 103 {
mbed_official 0:f4db29eb9e47 104 volatile u32_t statusinfo; /**< RX status word */
mbed_official 0:f4db29eb9e47 105 volatile u32_t statushashcrc; /**< RX hash CRC */
mbed_official 0:f4db29eb9e47 106 } LPC_TXRX_STATUS_T;
mbed_official 0:f4db29eb9e47 107
mbed_official 0:f4db29eb9e47 108 /* LPC EMAC driver data structure */
mbed_official 0:f4db29eb9e47 109 struct lpc_enetdata {
mbed_official 0:f4db29eb9e47 110 /* prxs must be 8 byte aligned! */
mbed_official 0:f4db29eb9e47 111 LPC_TXRX_STATUS_T prxs[LPC_NUM_BUFF_RXDESCS]; /**< Pointer to RX statuses */
mbed_official 0:f4db29eb9e47 112 struct netif *netif; /**< Reference back to LWIP parent netif */
mbed_official 0:f4db29eb9e47 113 LPC_TXRX_DESC_T ptxd[LPC_NUM_BUFF_TXDESCS]; /**< Pointer to TX descriptor list */
mbed_official 0:f4db29eb9e47 114 LPC_TXRX_STATUS_T ptxs[LPC_NUM_BUFF_TXDESCS]; /**< Pointer to TX statuses */
mbed_official 0:f4db29eb9e47 115 LPC_TXRX_DESC_T prxd[LPC_NUM_BUFF_RXDESCS]; /**< Pointer to RX descriptor list */
mbed_official 0:f4db29eb9e47 116 struct pbuf *rxb[LPC_NUM_BUFF_RXDESCS]; /**< RX pbuf pointer list, zero-copy mode */
mbed_official 0:f4db29eb9e47 117 u32_t rx_fill_desc_index; /**< RX descriptor next available index */
mbed_official 0:f4db29eb9e47 118 volatile u32_t rx_free_descs; /**< Count of free RX descriptors */
mbed_official 0:f4db29eb9e47 119 struct pbuf *txb[LPC_NUM_BUFF_TXDESCS]; /**< TX pbuf pointer list, zero-copy mode */
mbed_official 0:f4db29eb9e47 120 u32_t lpc_last_tx_idx; /**< TX last descriptor index, zero-copy mode */
mbed_official 0:f4db29eb9e47 121 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 122 sys_sem_t RxSem; /**< RX receive thread wakeup semaphore */
mbed_official 0:f4db29eb9e47 123 sys_sem_t TxCleanSem; /**< TX cleanup thread wakeup semaphore */
mbed_official 0:f4db29eb9e47 124 sys_mutex_t TXLockMutex; /**< TX critical section mutex */
mbed_official 0:f4db29eb9e47 125 xSemaphoreHandle xTXDCountSem; /**< TX free buffer counting semaphore */
mbed_official 0:f4db29eb9e47 126 #endif
mbed_official 0:f4db29eb9e47 127 };
mbed_official 0:f4db29eb9e47 128
mbed_official 0:f4db29eb9e47 129 /** \brief LPC EMAC driver work data
mbed_official 0:f4db29eb9e47 130 */
mbed_official 0:f4db29eb9e47 131 ALIGNED(8) struct lpc_enetdata lpc_enetdata;
mbed_official 0:f4db29eb9e47 132
mbed_official 0:f4db29eb9e47 133 /* Write a value via the MII link (non-blocking) */
mbed_official 0:f4db29eb9e47 134 void lpc_mii_write_noblock(u32_t PhyReg, u32_t Value)
mbed_official 0:f4db29eb9e47 135 {
mbed_official 0:f4db29eb9e47 136 /* Write value at PHY address and register */
mbed_official 0:f4db29eb9e47 137 LPC_EMAC->MADR = (LPC_PHYDEF_PHYADDR << 8) | PhyReg;
mbed_official 0:f4db29eb9e47 138 LPC_EMAC->MWTD = Value;
mbed_official 0:f4db29eb9e47 139 }
mbed_official 0:f4db29eb9e47 140
mbed_official 0:f4db29eb9e47 141 /* Write a value via the MII link (blocking) */
mbed_official 0:f4db29eb9e47 142 err_t lpc_mii_write(u32_t PhyReg, u32_t Value)
mbed_official 0:f4db29eb9e47 143 {
mbed_official 0:f4db29eb9e47 144 u32_t mst = 250;
mbed_official 0:f4db29eb9e47 145 err_t sts = ERR_OK;
mbed_official 0:f4db29eb9e47 146
mbed_official 0:f4db29eb9e47 147 /* Write value at PHY address and register */
mbed_official 0:f4db29eb9e47 148 lpc_mii_write_noblock(PhyReg, Value);
mbed_official 0:f4db29eb9e47 149
mbed_official 0:f4db29eb9e47 150 /* Wait for unbusy status */
mbed_official 0:f4db29eb9e47 151 while (mst > 0) {
mbed_official 0:f4db29eb9e47 152 sts = LPC_EMAC->MIND;
mbed_official 0:f4db29eb9e47 153 if ((sts & EMAC_MIND_BUSY) == 0)
mbed_official 0:f4db29eb9e47 154 mst = 0;
mbed_official 0:f4db29eb9e47 155 else {
mbed_official 0:f4db29eb9e47 156 mst--;
mbed_official 0:f4db29eb9e47 157 msDelay(1);
mbed_official 0:f4db29eb9e47 158 }
mbed_official 0:f4db29eb9e47 159 }
mbed_official 0:f4db29eb9e47 160
mbed_official 0:f4db29eb9e47 161 if (sts != 0)
mbed_official 0:f4db29eb9e47 162 sts = ERR_TIMEOUT;
mbed_official 0:f4db29eb9e47 163
mbed_official 0:f4db29eb9e47 164 return sts;
mbed_official 0:f4db29eb9e47 165 }
mbed_official 0:f4db29eb9e47 166
mbed_official 0:f4db29eb9e47 167 /* Reads current MII link busy status */
mbed_official 0:f4db29eb9e47 168 u32_t lpc_mii_is_busy(void)
mbed_official 0:f4db29eb9e47 169 {
mbed_official 0:f4db29eb9e47 170 return (u32_t) (LPC_EMAC->MIND & EMAC_MIND_BUSY);
mbed_official 0:f4db29eb9e47 171 }
mbed_official 0:f4db29eb9e47 172
mbed_official 0:f4db29eb9e47 173 /* Starts a read operation via the MII link (non-blocking) */
mbed_official 0:f4db29eb9e47 174 u32_t lpc_mii_read_data(void)
mbed_official 0:f4db29eb9e47 175 {
mbed_official 0:f4db29eb9e47 176 u32_t data = LPC_EMAC->MRDD;
mbed_official 0:f4db29eb9e47 177 LPC_EMAC->MCMD = 0;
mbed_official 0:f4db29eb9e47 178
mbed_official 0:f4db29eb9e47 179 return data;
mbed_official 0:f4db29eb9e47 180 }
mbed_official 0:f4db29eb9e47 181
mbed_official 0:f4db29eb9e47 182 /* Starts a read operation via the MII link (non-blocking) */
mbed_official 0:f4db29eb9e47 183 void lpc_mii_read_noblock(u32_t PhyReg)
mbed_official 0:f4db29eb9e47 184 {
mbed_official 0:f4db29eb9e47 185 /* Read value at PHY address and register */
mbed_official 0:f4db29eb9e47 186 LPC_EMAC->MADR = (LPC_PHYDEF_PHYADDR << 8) | PhyReg;
mbed_official 0:f4db29eb9e47 187 LPC_EMAC->MCMD = EMAC_MCMD_READ;
mbed_official 0:f4db29eb9e47 188 }
mbed_official 0:f4db29eb9e47 189
mbed_official 0:f4db29eb9e47 190 /* Read a value via the MII link (blocking) */
mbed_official 0:f4db29eb9e47 191 err_t lpc_mii_read(u32_t PhyReg, u32_t *data)
mbed_official 0:f4db29eb9e47 192 {
mbed_official 0:f4db29eb9e47 193 u32_t mst = 250;
mbed_official 0:f4db29eb9e47 194 err_t sts = ERR_OK;
mbed_official 0:f4db29eb9e47 195
mbed_official 0:f4db29eb9e47 196 /* Read value at PHY address and register */
mbed_official 0:f4db29eb9e47 197 lpc_mii_read_noblock(PhyReg);
mbed_official 0:f4db29eb9e47 198
mbed_official 0:f4db29eb9e47 199 /* Wait for unbusy status */
mbed_official 0:f4db29eb9e47 200 while (mst > 0) {
mbed_official 0:f4db29eb9e47 201 sts = LPC_EMAC->MIND & ~EMAC_MIND_MII_LINK_FAIL;
mbed_official 0:f4db29eb9e47 202 if ((sts & EMAC_MIND_BUSY) == 0) {
mbed_official 0:f4db29eb9e47 203 mst = 0;
mbed_official 0:f4db29eb9e47 204 *data = LPC_EMAC->MRDD;
mbed_official 0:f4db29eb9e47 205 } else {
mbed_official 0:f4db29eb9e47 206 mst--;
mbed_official 0:f4db29eb9e47 207 msDelay(1);
mbed_official 0:f4db29eb9e47 208 }
mbed_official 0:f4db29eb9e47 209 }
mbed_official 0:f4db29eb9e47 210
mbed_official 0:f4db29eb9e47 211 LPC_EMAC->MCMD = 0;
mbed_official 0:f4db29eb9e47 212
mbed_official 0:f4db29eb9e47 213 if (sts != 0)
mbed_official 0:f4db29eb9e47 214 sts = ERR_TIMEOUT;
mbed_official 0:f4db29eb9e47 215
mbed_official 0:f4db29eb9e47 216 return sts;
mbed_official 0:f4db29eb9e47 217 }
mbed_official 0:f4db29eb9e47 218
mbed_official 0:f4db29eb9e47 219 /** \brief Queues a pbuf into the RX descriptor list
mbed_official 0:f4db29eb9e47 220 *
mbed_official 0:f4db29eb9e47 221 * \param[in] lpc_enetif Pointer to the drvier data structure
mbed_official 0:f4db29eb9e47 222 * \param[in] p Pointer to pbuf to queue
mbed_official 0:f4db29eb9e47 223 */
mbed_official 0:f4db29eb9e47 224 static void lpc_rxqueue_pbuf(struct lpc_enetdata *lpc_enetif, struct pbuf *p)
mbed_official 0:f4db29eb9e47 225 {
mbed_official 0:f4db29eb9e47 226 u32_t idx;
mbed_official 0:f4db29eb9e47 227
mbed_official 0:f4db29eb9e47 228 /* Get next free descriptor index */
mbed_official 0:f4db29eb9e47 229 idx = lpc_enetif->rx_fill_desc_index;
mbed_official 0:f4db29eb9e47 230
mbed_official 0:f4db29eb9e47 231 /* Setup descriptor and clear statuses */
mbed_official 0:f4db29eb9e47 232 lpc_enetif->prxd[idx].control = EMAC_RCTRL_INT | ((u32_t) (p->len - 1));
mbed_official 0:f4db29eb9e47 233 lpc_enetif->prxd[idx].packet = (u32_t) p->payload;
mbed_official 0:f4db29eb9e47 234 lpc_enetif->prxs[idx].statusinfo = 0xFFFFFFFF;
mbed_official 0:f4db29eb9e47 235 lpc_enetif->prxs[idx].statushashcrc = 0xFFFFFFFF;
mbed_official 0:f4db29eb9e47 236
mbed_official 0:f4db29eb9e47 237 /* Save pbuf pointer for push to network layer later */
mbed_official 0:f4db29eb9e47 238 lpc_enetif->rxb[idx] = p;
mbed_official 0:f4db29eb9e47 239
mbed_official 0:f4db29eb9e47 240 /* Wrap at end of descriptor list */
mbed_official 0:f4db29eb9e47 241 idx++;
mbed_official 0:f4db29eb9e47 242 if (idx >= LPC_NUM_BUFF_RXDESCS)
mbed_official 0:f4db29eb9e47 243 idx = 0;
mbed_official 0:f4db29eb9e47 244
mbed_official 0:f4db29eb9e47 245 /* Queue descriptor(s) */
mbed_official 0:f4db29eb9e47 246 lpc_enetif->rx_free_descs -= 1;
mbed_official 0:f4db29eb9e47 247 lpc_enetif->rx_fill_desc_index = idx;
mbed_official 0:f4db29eb9e47 248 LPC_EMAC->RxConsumeIndex = idx;
mbed_official 0:f4db29eb9e47 249
mbed_official 0:f4db29eb9e47 250 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 0:f4db29eb9e47 251 ("lpc_rxqueue_pbuf: pbuf packet queued: %p (free desc=%d)\n", p,
mbed_official 0:f4db29eb9e47 252 lpc_enetif->rx_free_descs));
mbed_official 0:f4db29eb9e47 253 }
mbed_official 0:f4db29eb9e47 254
mbed_official 0:f4db29eb9e47 255 /** \brief Attempt to allocate and requeue a new pbuf for RX
mbed_official 0:f4db29eb9e47 256 *
mbed_official 0:f4db29eb9e47 257 * \param[in] netif Pointer to the netif structure
mbed_official 0:f4db29eb9e47 258 * \returns 1 if a packet was allocated and requeued, otherwise 0
mbed_official 0:f4db29eb9e47 259 */
mbed_official 0:f4db29eb9e47 260 s32_t lpc_rx_queue(struct netif *netif)
mbed_official 0:f4db29eb9e47 261 {
mbed_official 0:f4db29eb9e47 262 struct lpc_enetdata *lpc_enetif = netif->state;
mbed_official 0:f4db29eb9e47 263 struct pbuf *p;
mbed_official 0:f4db29eb9e47 264 s32_t queued = 0;
mbed_official 0:f4db29eb9e47 265
mbed_official 0:f4db29eb9e47 266 /* Attempt to requeue as many packets as possible */
mbed_official 0:f4db29eb9e47 267 while (lpc_enetif->rx_free_descs > 0) {
mbed_official 0:f4db29eb9e47 268 /* Allocate a pbuf from the pool. We need to allocate at the
mbed_official 0:f4db29eb9e47 269 maximum size as we don't know the size of the yet to be
mbed_official 0:f4db29eb9e47 270 received packet. */
mbed_official 0:f4db29eb9e47 271 p = pbuf_alloc(PBUF_RAW, (u16_t) EMAC_ETH_MAX_FLEN, PBUF_RAM);
mbed_official 0:f4db29eb9e47 272 if (p == NULL) {
mbed_official 0:f4db29eb9e47 273 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 0:f4db29eb9e47 274 ("lpc_rx_queue: could not allocate RX pbuf (free desc=%d)\n",
mbed_official 0:f4db29eb9e47 275 lpc_enetif->rx_free_descs));
mbed_official 0:f4db29eb9e47 276 return queued;
mbed_official 0:f4db29eb9e47 277 }
mbed_official 0:f4db29eb9e47 278
mbed_official 0:f4db29eb9e47 279 /* pbufs allocated from the RAM pool should be non-chained. */
mbed_official 0:f4db29eb9e47 280 LWIP_ASSERT("lpc_rx_queue: pbuf is not contiguous (chained)",
mbed_official 0:f4db29eb9e47 281 pbuf_clen(p) <= 1);
mbed_official 0:f4db29eb9e47 282
mbed_official 0:f4db29eb9e47 283 /* Queue packet */
mbed_official 0:f4db29eb9e47 284 lpc_rxqueue_pbuf(lpc_enetif, p);
mbed_official 0:f4db29eb9e47 285
mbed_official 0:f4db29eb9e47 286 /* Update queued count */
mbed_official 0:f4db29eb9e47 287 queued++;
mbed_official 0:f4db29eb9e47 288 }
mbed_official 0:f4db29eb9e47 289
mbed_official 0:f4db29eb9e47 290 return queued;
mbed_official 0:f4db29eb9e47 291 }
mbed_official 0:f4db29eb9e47 292
mbed_official 0:f4db29eb9e47 293 /** \brief Sets up the RX descriptor ring buffers.
mbed_official 0:f4db29eb9e47 294 *
mbed_official 0:f4db29eb9e47 295 * This function sets up the descriptor list used for receive packets.
mbed_official 0:f4db29eb9e47 296 *
mbed_official 0:f4db29eb9e47 297 * \param[in] lpc_enetif Pointer to driver data structure
mbed_official 0:f4db29eb9e47 298 * \returns Always returns ERR_OK
mbed_official 0:f4db29eb9e47 299 */
mbed_official 0:f4db29eb9e47 300 static err_t lpc_rx_setup(struct lpc_enetdata *lpc_enetif)
mbed_official 0:f4db29eb9e47 301 {
mbed_official 0:f4db29eb9e47 302 s32_t idx;
mbed_official 0:f4db29eb9e47 303
mbed_official 0:f4db29eb9e47 304 /* Setup pointers to RX structures */
mbed_official 0:f4db29eb9e47 305 LPC_EMAC->RxDescriptor = (u32_t) &lpc_enetif->prxd[0];
mbed_official 0:f4db29eb9e47 306 LPC_EMAC->RxStatus = (u32_t) &lpc_enetif->prxs[0];
mbed_official 0:f4db29eb9e47 307 LPC_EMAC->RxDescriptorNumber = LPC_NUM_BUFF_RXDESCS - 1;
mbed_official 0:f4db29eb9e47 308
mbed_official 0:f4db29eb9e47 309 lpc_enetif->rx_free_descs = LPC_NUM_BUFF_RXDESCS;
mbed_official 0:f4db29eb9e47 310 lpc_enetif->rx_fill_desc_index = 0;
mbed_official 0:f4db29eb9e47 311
mbed_official 0:f4db29eb9e47 312 /* Build RX buffer and descriptors */
mbed_official 0:f4db29eb9e47 313 lpc_rx_queue(lpc_enetif->netif);
mbed_official 0:f4db29eb9e47 314
mbed_official 0:f4db29eb9e47 315 return ERR_OK;
mbed_official 0:f4db29eb9e47 316 }
mbed_official 0:f4db29eb9e47 317
mbed_official 0:f4db29eb9e47 318 /** \brief Allocates a pbuf and returns the data from the incoming packet.
mbed_official 0:f4db29eb9e47 319 *
mbed_official 0:f4db29eb9e47 320 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 0:f4db29eb9e47 321 * \return a pbuf filled with the received packet (including MAC header)
mbed_official 0:f4db29eb9e47 322 * NULL on memory error
mbed_official 0:f4db29eb9e47 323 */
mbed_official 0:f4db29eb9e47 324 static struct pbuf *lpc_low_level_input(struct netif *netif)
mbed_official 0:f4db29eb9e47 325 {
mbed_official 0:f4db29eb9e47 326 struct lpc_enetdata *lpc_enetif = netif->state;
mbed_official 0:f4db29eb9e47 327 struct pbuf *p = NULL, *q;
mbed_official 0:f4db29eb9e47 328 u32_t idx, length;
mbed_official 0:f4db29eb9e47 329 u8_t *src;
mbed_official 0:f4db29eb9e47 330
mbed_official 0:f4db29eb9e47 331 #ifdef LOCK_RX_THREAD
mbed_official 0:f4db29eb9e47 332 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 333 /* Get exclusive access */
mbed_official 0:f4db29eb9e47 334 sys_mutex_lock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 335 #endif
mbed_official 0:f4db29eb9e47 336 #endif
mbed_official 0:f4db29eb9e47 337
mbed_official 0:f4db29eb9e47 338 /* Monitor RX overrun status. This should never happen unless
mbed_official 0:f4db29eb9e47 339 (possibly) the internal bus is behing held up by something.
mbed_official 0:f4db29eb9e47 340 Unless your system is running at a very low clock speed or
mbed_official 0:f4db29eb9e47 341 there are possibilities that the internal buses may be held
mbed_official 0:f4db29eb9e47 342 up for a long time, this can probably safely be removed. */
mbed_official 0:f4db29eb9e47 343 if (LPC_EMAC->IntStatus & EMAC_INT_RX_OVERRUN) {
mbed_official 0:f4db29eb9e47 344 LINK_STATS_INC(link.err);
mbed_official 0:f4db29eb9e47 345 LINK_STATS_INC(link.drop);
mbed_official 0:f4db29eb9e47 346
mbed_official 0:f4db29eb9e47 347 /* Temporarily disable RX */
mbed_official 0:f4db29eb9e47 348 LPC_EMAC->MAC1 &= ~EMAC_MAC1_REC_EN;
mbed_official 0:f4db29eb9e47 349
mbed_official 0:f4db29eb9e47 350 /* Reset the RX side */
mbed_official 0:f4db29eb9e47 351 LPC_EMAC->MAC1 |= EMAC_MAC1_RES_RX;
mbed_official 0:f4db29eb9e47 352 LPC_EMAC->IntClear = EMAC_INT_RX_OVERRUN;
mbed_official 0:f4db29eb9e47 353
mbed_official 0:f4db29eb9e47 354 /* De-allocate all queued RX pbufs */
mbed_official 0:f4db29eb9e47 355 for (idx = 0; idx < LPC_NUM_BUFF_RXDESCS; idx++) {
mbed_official 0:f4db29eb9e47 356 if (lpc_enetif->rxb[idx] != NULL) {
mbed_official 0:f4db29eb9e47 357 pbuf_free(lpc_enetif->rxb[idx]);
mbed_official 0:f4db29eb9e47 358 lpc_enetif->rxb[idx] = NULL;
mbed_official 0:f4db29eb9e47 359 }
mbed_official 0:f4db29eb9e47 360 }
mbed_official 0:f4db29eb9e47 361
mbed_official 0:f4db29eb9e47 362 /* Start RX side again */
mbed_official 0:f4db29eb9e47 363 lpc_rx_setup(lpc_enetif);
mbed_official 0:f4db29eb9e47 364
mbed_official 0:f4db29eb9e47 365 /* Re-enable RX */
mbed_official 0:f4db29eb9e47 366 LPC_EMAC->MAC1 |= EMAC_MAC1_REC_EN;
mbed_official 0:f4db29eb9e47 367
mbed_official 0:f4db29eb9e47 368 #ifdef LOCK_RX_THREAD
mbed_official 0:f4db29eb9e47 369 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 370 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 371 #endif
mbed_official 0:f4db29eb9e47 372 #endif
mbed_official 0:f4db29eb9e47 373
mbed_official 0:f4db29eb9e47 374 return NULL;
mbed_official 0:f4db29eb9e47 375 }
mbed_official 0:f4db29eb9e47 376
mbed_official 0:f4db29eb9e47 377 /* Determine if a frame has been received */
mbed_official 0:f4db29eb9e47 378 length = 0;
mbed_official 0:f4db29eb9e47 379 idx = LPC_EMAC->RxConsumeIndex;
mbed_official 0:f4db29eb9e47 380 if (LPC_EMAC->RxProduceIndex != idx) {
mbed_official 0:f4db29eb9e47 381 /* Handle errors */
mbed_official 0:f4db29eb9e47 382 if (lpc_enetif->prxs[idx].statusinfo & (EMAC_RINFO_CRC_ERR |
mbed_official 0:f4db29eb9e47 383 EMAC_RINFO_SYM_ERR | EMAC_RINFO_ALIGN_ERR | EMAC_RINFO_LEN_ERR)) {
mbed_official 0:f4db29eb9e47 384 #if LINK_STATS
mbed_official 0:f4db29eb9e47 385 if (lpc_enetif->prxs[idx].statusinfo & (EMAC_RINFO_CRC_ERR |
mbed_official 0:f4db29eb9e47 386 EMAC_RINFO_SYM_ERR | EMAC_RINFO_ALIGN_ERR))
mbed_official 0:f4db29eb9e47 387 LINK_STATS_INC(link.chkerr);
mbed_official 0:f4db29eb9e47 388 if (lpc_enetif->prxs[idx].statusinfo & EMAC_RINFO_LEN_ERR)
mbed_official 0:f4db29eb9e47 389 LINK_STATS_INC(link.lenerr);
mbed_official 0:f4db29eb9e47 390 #endif
mbed_official 0:f4db29eb9e47 391
mbed_official 0:f4db29eb9e47 392 /* Drop the frame */
mbed_official 0:f4db29eb9e47 393 LINK_STATS_INC(link.drop);
mbed_official 0:f4db29eb9e47 394
mbed_official 0:f4db29eb9e47 395 /* Re-queue the pbuf for receive */
mbed_official 0:f4db29eb9e47 396 lpc_enetif->rx_free_descs++;
mbed_official 0:f4db29eb9e47 397 p = lpc_enetif->rxb[idx];
mbed_official 0:f4db29eb9e47 398 lpc_enetif->rxb[idx] = NULL;
mbed_official 0:f4db29eb9e47 399 lpc_rxqueue_pbuf(lpc_enetif, p);
mbed_official 0:f4db29eb9e47 400
mbed_official 0:f4db29eb9e47 401 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 0:f4db29eb9e47 402 ("lpc_low_level_input: Packet dropped with errors (0x%x)\n",
mbed_official 0:f4db29eb9e47 403 lpc_enetif->prxs[idx].statusinfo));
mbed_official 0:f4db29eb9e47 404 } else {
mbed_official 0:f4db29eb9e47 405 /* A packet is waiting, get length */
mbed_official 0:f4db29eb9e47 406 length = (lpc_enetif->prxs[idx].statusinfo & 0x7FF) + 1;
mbed_official 0:f4db29eb9e47 407
mbed_official 0:f4db29eb9e47 408 /* Zero-copy */
mbed_official 0:f4db29eb9e47 409 p = lpc_enetif->rxb[idx];
mbed_official 0:f4db29eb9e47 410 p->len = (u16_t) length;
mbed_official 0:f4db29eb9e47 411
mbed_official 0:f4db29eb9e47 412 /* Free pbuf from desriptor */
mbed_official 0:f4db29eb9e47 413 lpc_enetif->rxb[idx] = NULL;
mbed_official 0:f4db29eb9e47 414 lpc_enetif->rx_free_descs++;
mbed_official 0:f4db29eb9e47 415
mbed_official 0:f4db29eb9e47 416 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 0:f4db29eb9e47 417 ("lpc_low_level_input: Packet received: %p, size %d (index=%d)\n",
mbed_official 0:f4db29eb9e47 418 p, length, idx));
mbed_official 0:f4db29eb9e47 419
mbed_official 0:f4db29eb9e47 420 /* Save size */
mbed_official 0:f4db29eb9e47 421 p->tot_len = (u16_t) length;
mbed_official 0:f4db29eb9e47 422 LINK_STATS_INC(link.recv);
mbed_official 0:f4db29eb9e47 423
mbed_official 0:f4db29eb9e47 424 /* Queue new buffer(s) */
mbed_official 0:f4db29eb9e47 425 lpc_rx_queue(lpc_enetif->netif);
mbed_official 0:f4db29eb9e47 426 }
mbed_official 0:f4db29eb9e47 427 }
mbed_official 0:f4db29eb9e47 428
mbed_official 0:f4db29eb9e47 429 #ifdef LOCK_RX_THREAD
mbed_official 0:f4db29eb9e47 430 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 431 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 432 #endif
mbed_official 0:f4db29eb9e47 433 #endif
mbed_official 0:f4db29eb9e47 434
mbed_official 0:f4db29eb9e47 435 return p;
mbed_official 0:f4db29eb9e47 436 }
mbed_official 0:f4db29eb9e47 437
mbed_official 0:f4db29eb9e47 438 /** \brief Attempt to read a packet from the EMAC interface.
mbed_official 0:f4db29eb9e47 439 *
mbed_official 0:f4db29eb9e47 440 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 0:f4db29eb9e47 441 */
mbed_official 0:f4db29eb9e47 442 void lpc_enetif_input(struct netif *netif)
mbed_official 0:f4db29eb9e47 443 {
mbed_official 0:f4db29eb9e47 444 struct eth_hdr *ethhdr;
mbed_official 0:f4db29eb9e47 445 struct pbuf *p;
mbed_official 0:f4db29eb9e47 446
mbed_official 0:f4db29eb9e47 447 /* move received packet into a new pbuf */
mbed_official 0:f4db29eb9e47 448 p = lpc_low_level_input(netif);
mbed_official 0:f4db29eb9e47 449 if (p == NULL)
mbed_official 0:f4db29eb9e47 450 return;
mbed_official 0:f4db29eb9e47 451
mbed_official 0:f4db29eb9e47 452 /* points to packet payload, which starts with an Ethernet header */
mbed_official 0:f4db29eb9e47 453 ethhdr = p->payload;
mbed_official 0:f4db29eb9e47 454
mbed_official 0:f4db29eb9e47 455 switch (htons(ethhdr->type)) {
mbed_official 0:f4db29eb9e47 456 case ETHTYPE_IP:
mbed_official 0:f4db29eb9e47 457 case ETHTYPE_ARP:
mbed_official 0:f4db29eb9e47 458 #if PPPOE_SUPPORT
mbed_official 0:f4db29eb9e47 459 case ETHTYPE_PPPOEDISC:
mbed_official 0:f4db29eb9e47 460 case ETHTYPE_PPPOE:
mbed_official 0:f4db29eb9e47 461 #endif /* PPPOE_SUPPORT */
mbed_official 0:f4db29eb9e47 462 /* full packet send to tcpip_thread to process */
mbed_official 0:f4db29eb9e47 463 if (netif->input(p, netif) != ERR_OK) {
mbed_official 0:f4db29eb9e47 464 LWIP_DEBUGF(NETIF_DEBUG, ("lpc_enetif_input: IP input error\n"));
mbed_official 0:f4db29eb9e47 465 /* Free buffer */
mbed_official 0:f4db29eb9e47 466 pbuf_free(p);
mbed_official 0:f4db29eb9e47 467 }
mbed_official 0:f4db29eb9e47 468 break;
mbed_official 0:f4db29eb9e47 469
mbed_official 0:f4db29eb9e47 470 default:
mbed_official 0:f4db29eb9e47 471 /* Return buffer */
mbed_official 0:f4db29eb9e47 472 pbuf_free(p);
mbed_official 0:f4db29eb9e47 473 break;
mbed_official 0:f4db29eb9e47 474 }
mbed_official 0:f4db29eb9e47 475 }
mbed_official 0:f4db29eb9e47 476
mbed_official 0:f4db29eb9e47 477 /** \brief Determine if the passed address is usable for the ethernet
mbed_official 0:f4db29eb9e47 478 * DMA controller.
mbed_official 0:f4db29eb9e47 479 *
mbed_official 0:f4db29eb9e47 480 * \param[in] addr Address of packet to check for DMA safe operation
mbed_official 0:f4db29eb9e47 481 * \return 1 if the packet address is not safe, otherwise 0
mbed_official 0:f4db29eb9e47 482 */
mbed_official 0:f4db29eb9e47 483 static s32_t lpc_packet_addr_notsafe(void *addr) {
mbed_official 0:f4db29eb9e47 484 /* Check for legal address ranges */
mbed_official 0:f4db29eb9e47 485 if ((((u32_t) addr >= 0x20000000) && ((u32_t) addr < 0x20008000)) ||
mbed_official 0:f4db29eb9e47 486 (((u32_t) addr >= 0x80000000) && ((u32_t) addr < 0xF0000000)))
mbed_official 0:f4db29eb9e47 487 return 0;
mbed_official 0:f4db29eb9e47 488
mbed_official 0:f4db29eb9e47 489 return 1;
mbed_official 0:f4db29eb9e47 490 }
mbed_official 0:f4db29eb9e47 491
mbed_official 0:f4db29eb9e47 492 /** \brief Sets up the TX descriptor ring buffers.
mbed_official 0:f4db29eb9e47 493 *
mbed_official 0:f4db29eb9e47 494 * This function sets up the descriptor list used for transmit packets.
mbed_official 0:f4db29eb9e47 495 *
mbed_official 0:f4db29eb9e47 496 * \param[in] lpc_enetif Pointer to driver data structure
mbed_official 0:f4db29eb9e47 497 */
mbed_official 0:f4db29eb9e47 498 static err_t lpc_tx_setup(struct lpc_enetdata *lpc_enetif)
mbed_official 0:f4db29eb9e47 499 {
mbed_official 0:f4db29eb9e47 500 s32_t idx;
mbed_official 0:f4db29eb9e47 501
mbed_official 0:f4db29eb9e47 502 /* Build TX descriptors for local buffers */
mbed_official 0:f4db29eb9e47 503 for (idx = 0; idx < LPC_NUM_BUFF_TXDESCS; idx++) {
mbed_official 0:f4db29eb9e47 504 lpc_enetif->ptxd[idx].control = 0;
mbed_official 0:f4db29eb9e47 505 lpc_enetif->ptxs[idx].statusinfo = 0xFFFFFFFF;
mbed_official 0:f4db29eb9e47 506 }
mbed_official 0:f4db29eb9e47 507
mbed_official 0:f4db29eb9e47 508 /* Setup pointers to TX structures */
mbed_official 0:f4db29eb9e47 509 LPC_EMAC->TxDescriptor = (u32_t) &lpc_enetif->ptxd[0];
mbed_official 0:f4db29eb9e47 510 LPC_EMAC->TxStatus = (u32_t) &lpc_enetif->ptxs[0];
mbed_official 0:f4db29eb9e47 511 LPC_EMAC->TxDescriptorNumber = LPC_NUM_BUFF_TXDESCS - 1;
mbed_official 0:f4db29eb9e47 512
mbed_official 0:f4db29eb9e47 513 lpc_enetif->lpc_last_tx_idx = 0;
mbed_official 0:f4db29eb9e47 514
mbed_official 0:f4db29eb9e47 515 return ERR_OK;
mbed_official 0:f4db29eb9e47 516 }
mbed_official 0:f4db29eb9e47 517
mbed_official 0:f4db29eb9e47 518 /** \brief Free TX buffers that are complete
mbed_official 0:f4db29eb9e47 519 *
mbed_official 0:f4db29eb9e47 520 * \param[in] lpc_enetif Pointer to driver data structure
mbed_official 0:f4db29eb9e47 521 * \param[in] cidx EMAC current descriptor comsumer index
mbed_official 0:f4db29eb9e47 522 */
mbed_official 0:f4db29eb9e47 523 static void lpc_tx_reclaim_st(struct lpc_enetdata *lpc_enetif, u32_t cidx)
mbed_official 0:f4db29eb9e47 524 {
mbed_official 0:f4db29eb9e47 525 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 526 /* Get exclusive access */
mbed_official 0:f4db29eb9e47 527 sys_mutex_lock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 528 #endif
mbed_official 0:f4db29eb9e47 529
mbed_official 0:f4db29eb9e47 530 while (cidx != lpc_enetif->lpc_last_tx_idx) {
mbed_official 0:f4db29eb9e47 531 if (lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx] != NULL) {
mbed_official 0:f4db29eb9e47 532 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 0:f4db29eb9e47 533 ("lpc_tx_reclaim_st: Freeing packet %p (index %d)\n",
mbed_official 0:f4db29eb9e47 534 lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx],
mbed_official 0:f4db29eb9e47 535 lpc_enetif->lpc_last_tx_idx));
mbed_official 0:f4db29eb9e47 536 pbuf_free(lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx]);
mbed_official 0:f4db29eb9e47 537 lpc_enetif->txb[lpc_enetif->lpc_last_tx_idx] = NULL;
mbed_official 0:f4db29eb9e47 538 }
mbed_official 0:f4db29eb9e47 539
mbed_official 0:f4db29eb9e47 540 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 541 xSemaphoreGive(lpc_enetif->xTXDCountSem);
mbed_official 0:f4db29eb9e47 542 #endif
mbed_official 0:f4db29eb9e47 543 lpc_enetif->lpc_last_tx_idx++;
mbed_official 0:f4db29eb9e47 544 if (lpc_enetif->lpc_last_tx_idx >= LPC_NUM_BUFF_TXDESCS)
mbed_official 0:f4db29eb9e47 545 lpc_enetif->lpc_last_tx_idx = 0;
mbed_official 0:f4db29eb9e47 546 }
mbed_official 0:f4db29eb9e47 547
mbed_official 0:f4db29eb9e47 548 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 549 /* Restore access */
mbed_official 0:f4db29eb9e47 550 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 551 #endif
mbed_official 0:f4db29eb9e47 552 }
mbed_official 0:f4db29eb9e47 553
mbed_official 0:f4db29eb9e47 554 /** \brief User call for freeingTX buffers that are complete
mbed_official 0:f4db29eb9e47 555 *
mbed_official 0:f4db29eb9e47 556 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 0:f4db29eb9e47 557 */
mbed_official 0:f4db29eb9e47 558 void lpc_tx_reclaim(struct netif *netif)
mbed_official 0:f4db29eb9e47 559 {
mbed_official 0:f4db29eb9e47 560 lpc_tx_reclaim_st((struct lpc_enetdata *) netif->state,
mbed_official 0:f4db29eb9e47 561 LPC_EMAC->TxConsumeIndex);
mbed_official 0:f4db29eb9e47 562 }
mbed_official 0:f4db29eb9e47 563
mbed_official 0:f4db29eb9e47 564 /** \brief Polls if an available TX descriptor is ready. Can be used to
mbed_official 0:f4db29eb9e47 565 * determine if the low level transmit function will block.
mbed_official 0:f4db29eb9e47 566 *
mbed_official 0:f4db29eb9e47 567 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 0:f4db29eb9e47 568 * \return 0 if no descriptors are read, or >0
mbed_official 0:f4db29eb9e47 569 */
mbed_official 0:f4db29eb9e47 570 s32_t lpc_tx_ready(struct netif *netif)
mbed_official 0:f4db29eb9e47 571 {
mbed_official 0:f4db29eb9e47 572 s32_t fb;
mbed_official 0:f4db29eb9e47 573 u32_t idx, cidx;
mbed_official 0:f4db29eb9e47 574
mbed_official 0:f4db29eb9e47 575 cidx = LPC_EMAC->TxConsumeIndex;
mbed_official 0:f4db29eb9e47 576 idx = LPC_EMAC->TxProduceIndex;
mbed_official 0:f4db29eb9e47 577
mbed_official 0:f4db29eb9e47 578 /* Determine number of free buffers */
mbed_official 0:f4db29eb9e47 579 if (idx == cidx)
mbed_official 0:f4db29eb9e47 580 fb = LPC_NUM_BUFF_TXDESCS;
mbed_official 0:f4db29eb9e47 581 else if (cidx > idx)
mbed_official 0:f4db29eb9e47 582 fb = (LPC_NUM_BUFF_TXDESCS - 1) -
mbed_official 0:f4db29eb9e47 583 ((idx + LPC_NUM_BUFF_TXDESCS) - cidx);
mbed_official 0:f4db29eb9e47 584 else
mbed_official 0:f4db29eb9e47 585 fb = (LPC_NUM_BUFF_TXDESCS - 1) - (cidx - idx);
mbed_official 0:f4db29eb9e47 586
mbed_official 0:f4db29eb9e47 587 return fb;
mbed_official 0:f4db29eb9e47 588 }
mbed_official 0:f4db29eb9e47 589
mbed_official 0:f4db29eb9e47 590 /** \brief Low level output of a packet. Never call this from an
mbed_official 0:f4db29eb9e47 591 * interrupt context, as it may block until TX descriptors
mbed_official 0:f4db29eb9e47 592 * become available.
mbed_official 0:f4db29eb9e47 593 *
mbed_official 0:f4db29eb9e47 594 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 0:f4db29eb9e47 595 * \param[in] p the MAC packet to send (e.g. IP packet including MAC addresses and type)
mbed_official 0:f4db29eb9e47 596 * \return ERR_OK if the packet could be sent or an err_t value if the packet couldn't be sent
mbed_official 0:f4db29eb9e47 597 */
mbed_official 0:f4db29eb9e47 598 static err_t lpc_low_level_output(struct netif *netif, struct pbuf *p)
mbed_official 0:f4db29eb9e47 599 {
mbed_official 0:f4db29eb9e47 600 struct lpc_enetdata *lpc_enetif = netif->state;
mbed_official 0:f4db29eb9e47 601 struct pbuf *q;
mbed_official 0:f4db29eb9e47 602 u8_t *dst;
mbed_official 0:f4db29eb9e47 603 u32_t idx, sz = 0;
mbed_official 0:f4db29eb9e47 604 err_t err = ERR_OK;
mbed_official 0:f4db29eb9e47 605 struct pbuf *np;
mbed_official 0:f4db29eb9e47 606 u32_t dn, notdmasafe = 0;
mbed_official 0:f4db29eb9e47 607
mbed_official 0:f4db29eb9e47 608 /* Zero-copy TX buffers may be fragmented across mutliple payload
mbed_official 0:f4db29eb9e47 609 chains. Determine the number of descriptors needed for the
mbed_official 0:f4db29eb9e47 610 transfer. The pbuf chaining can be a mess! */
mbed_official 0:f4db29eb9e47 611 dn = (u32_t) pbuf_clen(p);
mbed_official 0:f4db29eb9e47 612
mbed_official 0:f4db29eb9e47 613 /* Test to make sure packet addresses are DMA safe. A DMA safe
mbed_official 0:f4db29eb9e47 614 address is once that uses external memory or periphheral RAM.
mbed_official 0:f4db29eb9e47 615 IRAM and FLASH are not safe! */
mbed_official 0:f4db29eb9e47 616 for (q = p; q != NULL; q = q->next)
mbed_official 0:f4db29eb9e47 617 notdmasafe += lpc_packet_addr_notsafe(q->payload);
mbed_official 0:f4db29eb9e47 618
mbed_official 0:f4db29eb9e47 619 #if LPC_TX_PBUF_BOUNCE_EN==1
mbed_official 0:f4db29eb9e47 620 /* If the pbuf is not DMA safe, a new bounce buffer (pbuf) will be
mbed_official 0:f4db29eb9e47 621 created that will be used instead. This requires an copy from the
mbed_official 0:f4db29eb9e47 622 non-safe DMA region to the new pbuf */
mbed_official 0:f4db29eb9e47 623 if (notdmasafe) {
mbed_official 0:f4db29eb9e47 624 /* Allocate a pbuf in DMA memory */
mbed_official 0:f4db29eb9e47 625 np = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
mbed_official 0:f4db29eb9e47 626 if (np == NULL)
mbed_official 0:f4db29eb9e47 627 return ERR_MEM;
mbed_official 0:f4db29eb9e47 628
mbed_official 0:f4db29eb9e47 629 /* This buffer better be contiguous! */
mbed_official 0:f4db29eb9e47 630 LWIP_ASSERT("lpc_low_level_output: New transmit pbuf is chained",
mbed_official 0:f4db29eb9e47 631 (pbuf_clen(np) == 1));
mbed_official 0:f4db29eb9e47 632
mbed_official 0:f4db29eb9e47 633 /* Copy to DMA safe pbuf */
mbed_official 0:f4db29eb9e47 634 dst = (u8_t *) np->payload;
mbed_official 0:f4db29eb9e47 635 for(q = p; q != NULL; q = q->next) {
mbed_official 0:f4db29eb9e47 636 /* Copy the buffer to the descriptor's buffer */
mbed_official 0:f4db29eb9e47 637 MEMCPY(dst, (u8_t *) q->payload, q->len);
mbed_official 0:f4db29eb9e47 638 dst += q->len;
mbed_official 0:f4db29eb9e47 639 }
mbed_official 0:f4db29eb9e47 640 np->len = p->tot_len;
mbed_official 0:f4db29eb9e47 641
mbed_official 0:f4db29eb9e47 642 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 0:f4db29eb9e47 643 ("lpc_low_level_output: Switched to DMA safe buffer, old=%p, new=%p\n",
mbed_official 0:f4db29eb9e47 644 q, np));
mbed_official 0:f4db29eb9e47 645
mbed_official 0:f4db29eb9e47 646 /* use the new buffer for descrptor queueing. The original pbuf will
mbed_official 0:f4db29eb9e47 647 be de-allocated outsuide this driver. */
mbed_official 0:f4db29eb9e47 648 p = np;
mbed_official 0:f4db29eb9e47 649 dn = 1;
mbed_official 0:f4db29eb9e47 650 }
mbed_official 0:f4db29eb9e47 651 #else
mbed_official 0:f4db29eb9e47 652 if (notdmasafe)
mbed_official 0:f4db29eb9e47 653 LWIP_ASSERT("lpc_low_level_output: Not a DMA safe pbuf",
mbed_official 0:f4db29eb9e47 654 (notdmasafe == 0));
mbed_official 0:f4db29eb9e47 655 #endif
mbed_official 0:f4db29eb9e47 656
mbed_official 0:f4db29eb9e47 657 /* Wait until enough descriptors are available for the transfer. */
mbed_official 0:f4db29eb9e47 658 /* THIS WILL BLOCK UNTIL THERE ARE ENOUGH DESCRIPTORS AVAILABLE */
mbed_official 0:f4db29eb9e47 659 while (dn > lpc_tx_ready(netif))
mbed_official 0:f4db29eb9e47 660 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 661 xSemaphoreTake(lpc_enetif->xTXDCountSem, 0);
mbed_official 0:f4db29eb9e47 662 #else
mbed_official 0:f4db29eb9e47 663 msDelay(1);
mbed_official 0:f4db29eb9e47 664 #endif
mbed_official 0:f4db29eb9e47 665
mbed_official 0:f4db29eb9e47 666 /* Get free TX buffer index */
mbed_official 0:f4db29eb9e47 667 idx = LPC_EMAC->TxProduceIndex;
mbed_official 0:f4db29eb9e47 668
mbed_official 0:f4db29eb9e47 669 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 670 /* Get exclusive access */
mbed_official 0:f4db29eb9e47 671 sys_mutex_lock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 672 #endif
mbed_official 0:f4db29eb9e47 673
mbed_official 0:f4db29eb9e47 674 /* Prevent LWIP from de-allocating this pbuf. The driver will
mbed_official 0:f4db29eb9e47 675 free it once it's been transmitted. */
mbed_official 0:f4db29eb9e47 676 if (!notdmasafe)
mbed_official 0:f4db29eb9e47 677 pbuf_ref(p);
mbed_official 0:f4db29eb9e47 678
mbed_official 0:f4db29eb9e47 679 /* Setup transfers */
mbed_official 0:f4db29eb9e47 680 q = p;
mbed_official 0:f4db29eb9e47 681 while (dn > 0) {
mbed_official 0:f4db29eb9e47 682 dn--;
mbed_official 0:f4db29eb9e47 683
mbed_official 0:f4db29eb9e47 684 /* Only save pointer to free on last descriptor */
mbed_official 0:f4db29eb9e47 685 if (dn == 0) {
mbed_official 0:f4db29eb9e47 686 /* Save size of packet and signal it's ready */
mbed_official 0:f4db29eb9e47 687 lpc_enetif->ptxd[idx].control = (q->len - 1) | EMAC_TCTRL_INT |
mbed_official 0:f4db29eb9e47 688 EMAC_TCTRL_LAST;
mbed_official 0:f4db29eb9e47 689 lpc_enetif->txb[idx] = p;
mbed_official 0:f4db29eb9e47 690 }
mbed_official 0:f4db29eb9e47 691 else {
mbed_official 0:f4db29eb9e47 692 /* Save size of packet, descriptor is not last */
mbed_official 0:f4db29eb9e47 693 lpc_enetif->ptxd[idx].control = (q->len - 1) | EMAC_TCTRL_INT;
mbed_official 0:f4db29eb9e47 694 lpc_enetif->txb[idx] = NULL;
mbed_official 0:f4db29eb9e47 695 }
mbed_official 0:f4db29eb9e47 696
mbed_official 0:f4db29eb9e47 697 LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
mbed_official 0:f4db29eb9e47 698 ("lpc_low_level_output: pbuf packet(%p) sent, chain#=%d,"
mbed_official 0:f4db29eb9e47 699 " size = %d (index=%d)\n", q->payload, dn, q->len, idx));
mbed_official 0:f4db29eb9e47 700
mbed_official 0:f4db29eb9e47 701 lpc_enetif->ptxd[idx].packet = (u32_t) q->payload;
mbed_official 0:f4db29eb9e47 702
mbed_official 0:f4db29eb9e47 703 q = q->next;
mbed_official 0:f4db29eb9e47 704
mbed_official 0:f4db29eb9e47 705 idx++;
mbed_official 0:f4db29eb9e47 706 if (idx >= LPC_NUM_BUFF_TXDESCS)
mbed_official 0:f4db29eb9e47 707 idx = 0;
mbed_official 0:f4db29eb9e47 708 }
mbed_official 0:f4db29eb9e47 709
mbed_official 0:f4db29eb9e47 710 LPC_EMAC->TxProduceIndex = idx;
mbed_official 0:f4db29eb9e47 711
mbed_official 0:f4db29eb9e47 712 LINK_STATS_INC(link.xmit);
mbed_official 0:f4db29eb9e47 713
mbed_official 0:f4db29eb9e47 714 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 715 /* Restore access */
mbed_official 0:f4db29eb9e47 716 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 717 #endif
mbed_official 0:f4db29eb9e47 718
mbed_official 0:f4db29eb9e47 719 return ERR_OK;
mbed_official 0:f4db29eb9e47 720 }
mbed_official 0:f4db29eb9e47 721
mbed_official 0:f4db29eb9e47 722 /** \brief LPC EMAC interrupt handler.
mbed_official 0:f4db29eb9e47 723 *
mbed_official 0:f4db29eb9e47 724 * This function handles the transmit, receive, and error interrupt of
mbed_official 0:f4db29eb9e47 725 * the LPC177x_8x. This is meant to be used when NO_SYS=0.
mbed_official 0:f4db29eb9e47 726 */
mbed_official 0:f4db29eb9e47 727 void ENET_IRQHandler(void)
mbed_official 0:f4db29eb9e47 728 {
mbed_official 0:f4db29eb9e47 729 #if NO_SYS == 1
mbed_official 0:f4db29eb9e47 730 /* Interrupts are not used without an RTOS */
mbed_official 0:f4db29eb9e47 731 NVIC_DisableIRQ(ENET_IRQn);
mbed_official 0:f4db29eb9e47 732 #else
mbed_official 0:f4db29eb9e47 733 signed portBASE_TYPE xRecTaskWoken = pdFALSE, XTXTaskWoken = pdFALSE;
mbed_official 0:f4db29eb9e47 734 uint32_t ints;
mbed_official 0:f4db29eb9e47 735
mbed_official 0:f4db29eb9e47 736 /* Interrupts are of 2 groups - transmit or receive. Based on the
mbed_official 0:f4db29eb9e47 737 interrupt, kick off the receive or transmit (cleanup) task */
mbed_official 0:f4db29eb9e47 738
mbed_official 0:f4db29eb9e47 739 /* Get pending interrupts */
mbed_official 0:f4db29eb9e47 740 ints = LPC_EMAC->IntStatus;
mbed_official 0:f4db29eb9e47 741
mbed_official 0:f4db29eb9e47 742 if (ints & RXINTGROUP) {
mbed_official 0:f4db29eb9e47 743 /* RX group interrupt(s) */
mbed_official 0:f4db29eb9e47 744 /* Give semaphore to wakeup RX receive task. Note the FreeRTOS
mbed_official 0:f4db29eb9e47 745 method is used instead of the LWIP arch method. */
mbed_official 0:f4db29eb9e47 746 xSemaphoreGiveFromISR(lpc_enetdata.RxSem, &xRecTaskWoken);
mbed_official 0:f4db29eb9e47 747 }
mbed_official 0:f4db29eb9e47 748
mbed_official 0:f4db29eb9e47 749 if (ints & TXINTGROUP) {
mbed_official 0:f4db29eb9e47 750 /* TX group interrupt(s) */
mbed_official 0:f4db29eb9e47 751 /* Give semaphore to wakeup TX cleanup task. Note the FreeRTOS
mbed_official 0:f4db29eb9e47 752 method is used instead of the LWIP arch method. */
mbed_official 0:f4db29eb9e47 753 xSemaphoreGiveFromISR(lpc_enetdata.TxCleanSem, &XTXTaskWoken);
mbed_official 0:f4db29eb9e47 754 }
mbed_official 0:f4db29eb9e47 755
mbed_official 0:f4db29eb9e47 756 /* Clear pending interrupts */
mbed_official 0:f4db29eb9e47 757 LPC_EMAC->IntClear = ints;
mbed_official 0:f4db29eb9e47 758
mbed_official 0:f4db29eb9e47 759 /* Context switch needed? */
mbed_official 0:f4db29eb9e47 760 portEND_SWITCHING_ISR( xRecTaskWoken || XTXTaskWoken );
mbed_official 0:f4db29eb9e47 761 #endif
mbed_official 0:f4db29eb9e47 762 }
mbed_official 0:f4db29eb9e47 763
mbed_official 0:f4db29eb9e47 764 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 765 /** \brief Packet reception task
mbed_official 0:f4db29eb9e47 766 *
mbed_official 0:f4db29eb9e47 767 * This task is called when a packet is received. It will
mbed_official 0:f4db29eb9e47 768 * pass the packet to the LWIP core.
mbed_official 0:f4db29eb9e47 769 *
mbed_official 0:f4db29eb9e47 770 * \param[in] pvParameters Not used yet
mbed_official 0:f4db29eb9e47 771 */
mbed_official 0:f4db29eb9e47 772 static portTASK_FUNCTION( vPacketReceiveTask, pvParameters )
mbed_official 0:f4db29eb9e47 773 {
mbed_official 0:f4db29eb9e47 774 struct lpc_enetdata *lpc_enetif = pvParameters;
mbed_official 0:f4db29eb9e47 775
mbed_official 0:f4db29eb9e47 776 while (1) {
mbed_official 0:f4db29eb9e47 777 /* Wait for receive task to wakeup */
mbed_official 0:f4db29eb9e47 778 sys_arch_sem_wait(&lpc_enetif->RxSem, 0);
mbed_official 0:f4db29eb9e47 779
mbed_official 0:f4db29eb9e47 780 /* Process packets until all empty */
mbed_official 0:f4db29eb9e47 781 while (LPC_EMAC->RxConsumeIndex != LPC_EMAC->RxProduceIndex)
mbed_official 0:f4db29eb9e47 782 lpc_enetif_input(lpc_enetif->netif);
mbed_official 0:f4db29eb9e47 783 }
mbed_official 0:f4db29eb9e47 784 }
mbed_official 0:f4db29eb9e47 785
mbed_official 0:f4db29eb9e47 786 /** \brief Transmit cleanup task
mbed_official 0:f4db29eb9e47 787 *
mbed_official 0:f4db29eb9e47 788 * This task is called when a transmit interrupt occurs and
mbed_official 0:f4db29eb9e47 789 * reclaims the pbuf and descriptor used for the packet once
mbed_official 0:f4db29eb9e47 790 * the packet has been transferred.
mbed_official 0:f4db29eb9e47 791 *
mbed_official 0:f4db29eb9e47 792 * \param[in] pvParameters Not used yet
mbed_official 0:f4db29eb9e47 793 */
mbed_official 0:f4db29eb9e47 794 static portTASK_FUNCTION( vTransmitCleanupTask, pvParameters )
mbed_official 0:f4db29eb9e47 795 {
mbed_official 0:f4db29eb9e47 796 struct lpc_enetdata *lpc_enetif = pvParameters;
mbed_official 0:f4db29eb9e47 797 s32_t idx;
mbed_official 0:f4db29eb9e47 798
mbed_official 0:f4db29eb9e47 799 while (1) {
mbed_official 0:f4db29eb9e47 800 /* Wait for transmit cleanup task to wakeup */
mbed_official 0:f4db29eb9e47 801 sys_arch_sem_wait(&lpc_enetif->TxCleanSem, 0);
mbed_official 0:f4db29eb9e47 802
mbed_official 0:f4db29eb9e47 803 /* Error handling for TX underruns. This should never happen unless
mbed_official 0:f4db29eb9e47 804 something is holding the bus or the clocks are going too slow. It
mbed_official 0:f4db29eb9e47 805 can probably be safely removed. */
mbed_official 0:f4db29eb9e47 806 if (LPC_EMAC->IntStatus & EMAC_INT_TX_UNDERRUN) {
mbed_official 0:f4db29eb9e47 807 LINK_STATS_INC(link.err);
mbed_official 0:f4db29eb9e47 808 LINK_STATS_INC(link.drop);
mbed_official 0:f4db29eb9e47 809
mbed_official 0:f4db29eb9e47 810 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 811 /* Get exclusive access */
mbed_official 0:f4db29eb9e47 812 sys_mutex_lock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 813 #endif
mbed_official 0:f4db29eb9e47 814 /* Reset the TX side */
mbed_official 0:f4db29eb9e47 815 LPC_EMAC->MAC1 |= EMAC_MAC1_RES_TX;
mbed_official 0:f4db29eb9e47 816 LPC_EMAC->IntClear = EMAC_INT_TX_UNDERRUN;
mbed_official 0:f4db29eb9e47 817
mbed_official 0:f4db29eb9e47 818 /* De-allocate all queued TX pbufs */
mbed_official 0:f4db29eb9e47 819 for (idx = 0; idx < LPC_NUM_BUFF_RXDESCS; idx++) {
mbed_official 0:f4db29eb9e47 820 if (lpc_enetif->txb[idx] != NULL) {
mbed_official 0:f4db29eb9e47 821 pbuf_free(lpc_enetif->txb[idx]);
mbed_official 0:f4db29eb9e47 822 lpc_enetif->txb[idx] = NULL;
mbed_official 0:f4db29eb9e47 823 }
mbed_official 0:f4db29eb9e47 824 }
mbed_official 0:f4db29eb9e47 825
mbed_official 0:f4db29eb9e47 826 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 827 /* Restore access */
mbed_official 0:f4db29eb9e47 828 sys_mutex_unlock(&lpc_enetif->TXLockMutex);
mbed_official 0:f4db29eb9e47 829 #endif
mbed_official 0:f4db29eb9e47 830 /* Start TX side again */
mbed_official 0:f4db29eb9e47 831 lpc_tx_setup(lpc_enetif);
mbed_official 0:f4db29eb9e47 832 } else {
mbed_official 0:f4db29eb9e47 833 /* Free TX buffers that are done sending */
mbed_official 0:f4db29eb9e47 834 lpc_tx_reclaim(lpc_enetdata.netif);
mbed_official 0:f4db29eb9e47 835 }
mbed_official 0:f4db29eb9e47 836 }
mbed_official 0:f4db29eb9e47 837 }
mbed_official 0:f4db29eb9e47 838 #endif
mbed_official 0:f4db29eb9e47 839
mbed_official 0:f4db29eb9e47 840 /** \brief Low level init of the MAC and PHY.
mbed_official 0:f4db29eb9e47 841 *
mbed_official 0:f4db29eb9e47 842 * \param[in] netif Pointer to LWIP netif structure
mbed_official 0:f4db29eb9e47 843 */
mbed_official 0:f4db29eb9e47 844 static err_t low_level_init(struct netif *netif)
mbed_official 0:f4db29eb9e47 845 {
mbed_official 0:f4db29eb9e47 846 struct lpc_enetdata *lpc_enetif = netif->state;
mbed_official 0:f4db29eb9e47 847 err_t err = ERR_OK;
mbed_official 0:f4db29eb9e47 848
mbed_official 0:f4db29eb9e47 849 /* Enable MII clocking */
mbed_official 0:f4db29eb9e47 850 CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCENET, ENABLE);
mbed_official 0:f4db29eb9e47 851
mbed_official 0:f4db29eb9e47 852 /* Reset all MAC logic */
mbed_official 0:f4db29eb9e47 853 LPC_EMAC->MAC1 = EMAC_MAC1_RES_TX | EMAC_MAC1_RES_MCS_TX |
mbed_official 0:f4db29eb9e47 854 EMAC_MAC1_RES_RX | EMAC_MAC1_RES_MCS_RX | EMAC_MAC1_SIM_RES |
mbed_official 0:f4db29eb9e47 855 EMAC_MAC1_SOFT_RES;
mbed_official 0:f4db29eb9e47 856 LPC_EMAC->Command = EMAC_CR_REG_RES | EMAC_CR_TX_RES | EMAC_CR_RX_RES |
mbed_official 0:f4db29eb9e47 857 EMAC_CR_PASS_RUNT_FRM;
mbed_official 0:f4db29eb9e47 858 msDelay(10);
mbed_official 0:f4db29eb9e47 859
mbed_official 0:f4db29eb9e47 860 /* Initial MAC initialization */
mbed_official 0:f4db29eb9e47 861 LPC_EMAC->MAC1 = EMAC_MAC1_PASS_ALL;
mbed_official 0:f4db29eb9e47 862 LPC_EMAC->MAC2 = EMAC_MAC2_CRC_EN | EMAC_MAC2_PAD_EN |
mbed_official 0:f4db29eb9e47 863 EMAC_MAC2_VLAN_PAD_EN;
mbed_official 0:f4db29eb9e47 864 LPC_EMAC->MAXF = EMAC_ETH_MAX_FLEN;
mbed_official 0:f4db29eb9e47 865
mbed_official 0:f4db29eb9e47 866 /* Set RMII management clock rate to lowest speed */
mbed_official 0:f4db29eb9e47 867 LPC_EMAC->MCFG = EMAC_MCFG_CLK_SEL(11) | EMAC_MCFG_RES_MII;
mbed_official 0:f4db29eb9e47 868 LPC_EMAC->MCFG &= ~EMAC_MCFG_RES_MII;
mbed_official 0:f4db29eb9e47 869
mbed_official 0:f4db29eb9e47 870 /* Maximum number of retries, 0x37 collision window, gap */
mbed_official 0:f4db29eb9e47 871 LPC_EMAC->CLRT = EMAC_CLRT_DEF;
mbed_official 0:f4db29eb9e47 872 LPC_EMAC->IPGR = EMAC_IPGR_P1_DEF | EMAC_IPGR_P2_DEF;
mbed_official 0:f4db29eb9e47 873
mbed_official 0:f4db29eb9e47 874 #if LPC_EMAC_RMII
mbed_official 0:f4db29eb9e47 875 /* RMII setup */
mbed_official 0:f4db29eb9e47 876 LPC_EMAC->Command = EMAC_CR_PASS_RUNT_FRM | EMAC_CR_RMII;
mbed_official 0:f4db29eb9e47 877 #else
mbed_official 0:f4db29eb9e47 878 /* MII setup */
mbed_official 0:f4db29eb9e47 879 LPC_EMAC->CR = EMAC_CR_PASS_RUNT_FRM;
mbed_official 0:f4db29eb9e47 880 #endif
mbed_official 0:f4db29eb9e47 881
mbed_official 0:f4db29eb9e47 882 /* Initialize the PHY and reset */
mbed_official 0:f4db29eb9e47 883 err = lpc_phy_init(netif, LPC_EMAC_RMII);
mbed_official 0:f4db29eb9e47 884 if (err != ERR_OK)
mbed_official 0:f4db29eb9e47 885 return err;
mbed_official 0:f4db29eb9e47 886
mbed_official 0:f4db29eb9e47 887 /* Save station address */
mbed_official 0:f4db29eb9e47 888 LPC_EMAC->SA2 = (u32_t) netif->hwaddr[0] |
mbed_official 0:f4db29eb9e47 889 (((u32_t) netif->hwaddr[1]) << 8);
mbed_official 0:f4db29eb9e47 890 LPC_EMAC->SA1 = (u32_t) netif->hwaddr[2] |
mbed_official 0:f4db29eb9e47 891 (((u32_t) netif->hwaddr[3]) << 8);
mbed_official 0:f4db29eb9e47 892 LPC_EMAC->SA0 = (u32_t) netif->hwaddr[4] |
mbed_official 0:f4db29eb9e47 893 (((u32_t) netif->hwaddr[5]) << 8);
mbed_official 0:f4db29eb9e47 894
mbed_official 0:f4db29eb9e47 895 /* Setup transmit and receive descriptors */
mbed_official 0:f4db29eb9e47 896 if (lpc_tx_setup(lpc_enetif) != ERR_OK)
mbed_official 0:f4db29eb9e47 897 return ERR_BUF;
mbed_official 0:f4db29eb9e47 898 if (lpc_rx_setup(lpc_enetif) != ERR_OK)
mbed_official 0:f4db29eb9e47 899 return ERR_BUF;
mbed_official 0:f4db29eb9e47 900
mbed_official 0:f4db29eb9e47 901 /* Enable packet reception */
mbed_official 0:f4db29eb9e47 902 #if IP_SOF_BROADCAST_RECV
mbed_official 0:f4db29eb9e47 903 LPC_EMAC->RxFilterCtrl = EMAC_RFC_PERFECT_EN | EMAC_RFC_BCAST_EN;
mbed_official 0:f4db29eb9e47 904 #else
mbed_official 0:f4db29eb9e47 905 LPC_EMAC->RxFilterCtrl = EMAC_RFC_PERFECT_EN;
mbed_official 0:f4db29eb9e47 906 #endif
mbed_official 0:f4db29eb9e47 907
mbed_official 0:f4db29eb9e47 908 /* Clear and enable rx/tx interrupts */
mbed_official 0:f4db29eb9e47 909 LPC_EMAC->IntClear = 0xFFFF;
mbed_official 0:f4db29eb9e47 910 LPC_EMAC->IntEnable = RXINTGROUP | TXINTGROUP;
mbed_official 0:f4db29eb9e47 911
mbed_official 0:f4db29eb9e47 912 /* Enable RX and TX */
mbed_official 0:f4db29eb9e47 913 LPC_EMAC->Command |= EMAC_CR_RX_EN | EMAC_CR_TX_EN;
mbed_official 0:f4db29eb9e47 914 LPC_EMAC->MAC1 |= EMAC_MAC1_REC_EN;
mbed_official 0:f4db29eb9e47 915
mbed_official 0:f4db29eb9e47 916 return err;
mbed_official 0:f4db29eb9e47 917 }
mbed_official 0:f4db29eb9e47 918
mbed_official 0:f4db29eb9e47 919 /* This function provides a method for the PHY to setup the EMAC
mbed_official 0:f4db29eb9e47 920 for the PHY negotiated duplex mode */
mbed_official 0:f4db29eb9e47 921 void lpc_emac_set_duplex(int full_duplex)
mbed_official 0:f4db29eb9e47 922 {
mbed_official 0:f4db29eb9e47 923 if (full_duplex) {
mbed_official 0:f4db29eb9e47 924 LPC_EMAC->MAC2 |= EMAC_MAC2_FULL_DUP;
mbed_official 0:f4db29eb9e47 925 LPC_EMAC->Command |= EMAC_CR_FULL_DUP;
mbed_official 0:f4db29eb9e47 926 LPC_EMAC->IPGT = EMAC_IPGT_FULL_DUP;
mbed_official 0:f4db29eb9e47 927 } else {
mbed_official 0:f4db29eb9e47 928 LPC_EMAC->MAC2 &= ~EMAC_MAC2_FULL_DUP;
mbed_official 0:f4db29eb9e47 929 LPC_EMAC->Command &= ~EMAC_CR_FULL_DUP;
mbed_official 0:f4db29eb9e47 930 LPC_EMAC->IPGT = EMAC_IPGT_HALF_DUP;
mbed_official 0:f4db29eb9e47 931 }
mbed_official 0:f4db29eb9e47 932 }
mbed_official 0:f4db29eb9e47 933
mbed_official 0:f4db29eb9e47 934 /* This function provides a method for the PHY to setup the EMAC
mbed_official 0:f4db29eb9e47 935 for the PHY negotiated bit rate */
mbed_official 0:f4db29eb9e47 936 void lpc_emac_set_speed(int mbs_100)
mbed_official 0:f4db29eb9e47 937 {
mbed_official 0:f4db29eb9e47 938 if (mbs_100)
mbed_official 0:f4db29eb9e47 939 LPC_EMAC->SUPP = EMAC_SUPP_SPEED;
mbed_official 0:f4db29eb9e47 940 else
mbed_official 0:f4db29eb9e47 941 LPC_EMAC->SUPP = 0;
mbed_official 0:f4db29eb9e47 942 }
mbed_official 0:f4db29eb9e47 943
mbed_official 0:f4db29eb9e47 944 /**
mbed_official 0:f4db29eb9e47 945 * This function is the ethernet packet send function. It calls
mbed_official 0:f4db29eb9e47 946 * etharp_output after checking link status.
mbed_official 0:f4db29eb9e47 947 *
mbed_official 0:f4db29eb9e47 948 * \param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 0:f4db29eb9e47 949 * \param[in] q Pointer to pbug to send
mbed_official 0:f4db29eb9e47 950 * \param[in] ipaddr IP address
mbed_official 0:f4db29eb9e47 951 * \return ERR_OK or error code
mbed_official 0:f4db29eb9e47 952 */
mbed_official 0:f4db29eb9e47 953 err_t lpc_etharp_output(struct netif *netif, struct pbuf *q,
mbed_official 0:f4db29eb9e47 954 ip_addr_t *ipaddr)
mbed_official 0:f4db29eb9e47 955 {
mbed_official 0:f4db29eb9e47 956 /* Only send packet is link is up */
mbed_official 0:f4db29eb9e47 957 if (netif->flags & NETIF_FLAG_LINK_UP)
mbed_official 0:f4db29eb9e47 958 return etharp_output(netif, q, ipaddr);
mbed_official 0:f4db29eb9e47 959
mbed_official 0:f4db29eb9e47 960 return ERR_CONN;
mbed_official 0:f4db29eb9e47 961 }
mbed_official 0:f4db29eb9e47 962
mbed_official 0:f4db29eb9e47 963 /**
mbed_official 0:f4db29eb9e47 964 * Should be called at the beginning of the program to set up the
mbed_official 0:f4db29eb9e47 965 * network interface.
mbed_official 0:f4db29eb9e47 966 *
mbed_official 0:f4db29eb9e47 967 * This function should be passed as a parameter to netif_add().
mbed_official 0:f4db29eb9e47 968 *
mbed_official 0:f4db29eb9e47 969 * @param[in] netif the lwip network interface structure for this lpc_enetif
mbed_official 0:f4db29eb9e47 970 * @return ERR_OK if the loopif is initialized
mbed_official 0:f4db29eb9e47 971 * ERR_MEM if private data couldn't be allocated
mbed_official 0:f4db29eb9e47 972 * any other err_t on error
mbed_official 0:f4db29eb9e47 973 */
mbed_official 0:f4db29eb9e47 974 err_t lpc_enetif_init(struct netif *netif)
mbed_official 0:f4db29eb9e47 975 {
mbed_official 0:f4db29eb9e47 976 err_t err;
mbed_official 0:f4db29eb9e47 977
mbed_official 0:f4db29eb9e47 978 LWIP_ASSERT("netif != NULL", (netif != NULL));
mbed_official 0:f4db29eb9e47 979
mbed_official 0:f4db29eb9e47 980 lpc_enetdata.netif = netif;
mbed_official 0:f4db29eb9e47 981
mbed_official 0:f4db29eb9e47 982 /* set MAC hardware address */
mbed_official 0:f4db29eb9e47 983 board_get_macaddr(netif->hwaddr);
mbed_official 0:f4db29eb9e47 984 netif->hwaddr_len = ETHARP_HWADDR_LEN;
mbed_official 0:f4db29eb9e47 985
mbed_official 0:f4db29eb9e47 986 /* maximum transfer unit */
mbed_official 0:f4db29eb9e47 987 netif->mtu = 1500;
mbed_official 0:f4db29eb9e47 988
mbed_official 0:f4db29eb9e47 989 /* device capabilities */
mbed_official 0:f4db29eb9e47 990 netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_UP |
mbed_official 0:f4db29eb9e47 991 NETIF_FLAG_ETHERNET;
mbed_official 0:f4db29eb9e47 992
mbed_official 0:f4db29eb9e47 993 /* Initialize the hardware */
mbed_official 0:f4db29eb9e47 994 netif->state = &lpc_enetdata;
mbed_official 0:f4db29eb9e47 995 err = low_level_init(netif);
mbed_official 0:f4db29eb9e47 996 if (err != ERR_OK)
mbed_official 0:f4db29eb9e47 997 return err;
mbed_official 0:f4db29eb9e47 998
mbed_official 0:f4db29eb9e47 999 #if LWIP_NETIF_HOSTNAME
mbed_official 0:f4db29eb9e47 1000 /* Initialize interface hostname */
mbed_official 0:f4db29eb9e47 1001 netif->hostname = "lwiplpc";
mbed_official 0:f4db29eb9e47 1002 #endif /* LWIP_NETIF_HOSTNAME */
mbed_official 0:f4db29eb9e47 1003
mbed_official 0:f4db29eb9e47 1004 netif->name[0] = 'e';
mbed_official 0:f4db29eb9e47 1005 netif->name[1] = 'n';
mbed_official 0:f4db29eb9e47 1006
mbed_official 0:f4db29eb9e47 1007 netif->output = lpc_etharp_output;
mbed_official 0:f4db29eb9e47 1008 netif->linkoutput = lpc_low_level_output;
mbed_official 0:f4db29eb9e47 1009
mbed_official 0:f4db29eb9e47 1010 /* For FreeRTOS, start tasks */
mbed_official 0:f4db29eb9e47 1011 #if NO_SYS == 0
mbed_official 0:f4db29eb9e47 1012 lpc_enetdata.xTXDCountSem = xSemaphoreCreateCounting(LPC_NUM_BUFF_TXDESCS,
mbed_official 0:f4db29eb9e47 1013 LPC_NUM_BUFF_TXDESCS);
mbed_official 0:f4db29eb9e47 1014 LWIP_ASSERT("xTXDCountSem creation error",
mbed_official 0:f4db29eb9e47 1015 (lpc_enetdata.xTXDCountSem != NULL));
mbed_official 0:f4db29eb9e47 1016
mbed_official 0:f4db29eb9e47 1017 err = sys_mutex_new(&lpc_enetdata.TXLockMutex);
mbed_official 0:f4db29eb9e47 1018 LWIP_ASSERT("TXLockMutex creation error", (err == ERR_OK));
mbed_official 0:f4db29eb9e47 1019
mbed_official 0:f4db29eb9e47 1020 /* Packet receive task */
mbed_official 0:f4db29eb9e47 1021 err = sys_sem_new(&lpc_enetdata.RxSem, 0);
mbed_official 0:f4db29eb9e47 1022 LWIP_ASSERT("RxSem creation error", (err == ERR_OK));
mbed_official 0:f4db29eb9e47 1023 sys_thread_new("receive_thread", vPacketReceiveTask, netif->state,
mbed_official 0:f4db29eb9e47 1024 DEFAULT_THREAD_STACKSIZE, tskRECPKT_PRIORITY);
mbed_official 0:f4db29eb9e47 1025
mbed_official 0:f4db29eb9e47 1026 /* Transmit cleanup task */
mbed_official 0:f4db29eb9e47 1027 err = sys_sem_new(&lpc_enetdata.TxCleanSem, 0);
mbed_official 0:f4db29eb9e47 1028 LWIP_ASSERT("TxCleanSem creation error", (err == ERR_OK));
mbed_official 0:f4db29eb9e47 1029 sys_thread_new("txclean_thread", vTransmitCleanupTask, netif->state,
mbed_official 0:f4db29eb9e47 1030 DEFAULT_THREAD_STACKSIZE, tskTXCLEAN_PRIORITY);
mbed_official 0:f4db29eb9e47 1031 #endif
mbed_official 0:f4db29eb9e47 1032
mbed_official 0:f4db29eb9e47 1033 return ERR_OK;
mbed_official 0:f4db29eb9e47 1034 }
mbed_official 0:f4db29eb9e47 1035
mbed_official 0:f4db29eb9e47 1036 /**
mbed_official 0:f4db29eb9e47 1037 * @}
mbed_official 0:f4db29eb9e47 1038 */
mbed_official 0:f4db29eb9e47 1039
mbed_official 0:f4db29eb9e47 1040 /* --------------------------------- End Of File ------------------------------ */