Lee Kai Xuan
mbed-os
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erkin yucel
Diff: targets/TARGET_NXP/TARGET_LPC176X/ethernet_api.c
- Revision:
- 0:f269e3021894
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NXP/TARGET_LPC176X/ethernet_api.c Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,948 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "ethernet_api.h"
+
+#include <string.h>
+#include "cmsis.h"
+#include "mbed_interface.h"
+#include "toolchain.h"
+#include "mbed_error.h"
+
+#define NEW_LOGIC 0
+#define NEW_ETH_BUFFER 0
+
+#if NEW_ETH_BUFFER
+
+#define NUM_RX_FRAG 4 // Number of Rx Fragments (== packets)
+#define NUM_TX_FRAG 3 // Number of Tx Fragments (== packets)
+
+#define ETH_MAX_FLEN 1536 // Maximum Ethernet Frame Size
+#define ETH_FRAG_SIZE ETH_MAX_FLEN // Packet Fragment size (same as packet length)
+
+#else
+
+// Memfree calculation:
+// (16 * 1024) - ((2 * 4 * NUM_RX) + (2 * 4 * NUM_RX) + (0x300 * NUM_RX) +
+// (2 * 4 * NUM_TX) + (1 * 4 * NUM_TX) + (0x300 * NUM_TX)) = 8556
+/* EMAC Memory Buffer configuration for 16K Ethernet RAM. */
+#define NUM_RX_FRAG 4 /* Num.of RX Fragments 4*1536= 6.0kB */
+#define NUM_TX_FRAG 3 /* Num.of TX Fragments 3*1536= 4.6kB */
+//#define ETH_FRAG_SIZE 1536 /* Packet Fragment size 1536 Bytes */
+
+//#define ETH_MAX_FLEN 1536 /* Max. Ethernet Frame Size */
+#define ETH_FRAG_SIZE 0x300 /* Packet Fragment size 1536/2 Bytes */
+#define ETH_MAX_FLEN 0x300 /* Max. Ethernet Frame Size */
+
+const int ethernet_MTU_SIZE = 0x300;
+
+#endif
+
+#define ETHERNET_ADDR_SIZE 6
+
+struct RX_DESC_TypeDef { /* RX Descriptor struct */
+ unsigned int Packet;
+ unsigned int Ctrl;
+} PACKED;
+typedef struct RX_DESC_TypeDef RX_DESC_TypeDef;
+
+struct RX_STAT_TypeDef { /* RX Status struct */
+ unsigned int Info;
+ unsigned int HashCRC;
+} PACKED;
+typedef struct RX_STAT_TypeDef RX_STAT_TypeDef;
+
+struct TX_DESC_TypeDef { /* TX Descriptor struct */
+ unsigned int Packet;
+ unsigned int Ctrl;
+} PACKED;
+typedef struct TX_DESC_TypeDef TX_DESC_TypeDef;
+
+struct TX_STAT_TypeDef { /* TX Status struct */
+ unsigned int Info;
+} PACKED;
+typedef struct TX_STAT_TypeDef TX_STAT_TypeDef;
+
+/* MAC Configuration Register 1 */
+#define MAC1_REC_EN 0x00000001 /* Receive Enable */
+#define MAC1_PASS_ALL 0x00000002 /* Pass All Receive Frames */
+#define MAC1_RX_FLOWC 0x00000004 /* RX Flow Control */
+#define MAC1_TX_FLOWC 0x00000008 /* TX Flow Control */
+#define MAC1_LOOPB 0x00000010 /* Loop Back Mode */
+#define MAC1_RES_TX 0x00000100 /* Reset TX Logic */
+#define MAC1_RES_MCS_TX 0x00000200 /* Reset MAC TX Control Sublayer */
+#define MAC1_RES_RX 0x00000400 /* Reset RX Logic */
+#define MAC1_RES_MCS_RX 0x00000800 /* Reset MAC RX Control Sublayer */
+#define MAC1_SIM_RES 0x00004000 /* Simulation Reset */
+#define MAC1_SOFT_RES 0x00008000 /* Soft Reset MAC */
+
+/* MAC Configuration Register 2 */
+#define MAC2_FULL_DUP 0x00000001 /* Full Duplex Mode */
+#define MAC2_FRM_LEN_CHK 0x00000002 /* Frame Length Checking */
+#define MAC2_HUGE_FRM_EN 0x00000004 /* Huge Frame Enable */
+#define MAC2_DLY_CRC 0x00000008 /* Delayed CRC Mode */
+#define MAC2_CRC_EN 0x00000010 /* Append CRC to every Frame */
+#define MAC2_PAD_EN 0x00000020 /* Pad all Short Frames */
+#define MAC2_VLAN_PAD_EN 0x00000040 /* VLAN Pad Enable */
+#define MAC2_ADET_PAD_EN 0x00000080 /* Auto Detect Pad Enable */
+#define MAC2_PPREAM_ENF 0x00000100 /* Pure Preamble Enforcement */
+#define MAC2_LPREAM_ENF 0x00000200 /* Long Preamble Enforcement */
+#define MAC2_NO_BACKOFF 0x00001000 /* No Backoff Algorithm */
+#define MAC2_BACK_PRESSURE 0x00002000 /* Backoff Presurre / No Backoff */
+#define MAC2_EXCESS_DEF 0x00004000 /* Excess Defer */
+
+/* Back-to-Back Inter-Packet-Gap Register */
+#define IPGT_FULL_DUP 0x00000015 /* Recommended value for Full Duplex */
+#define IPGT_HALF_DUP 0x00000012 /* Recommended value for Half Duplex */
+
+/* Non Back-to-Back Inter-Packet-Gap Register */
+#define IPGR_DEF 0x00000012 /* Recommended value */
+
+/* Collision Window/Retry Register */
+#define CLRT_DEF 0x0000370F /* Default value */
+
+/* PHY Support Register */
+#define SUPP_SPEED 0x00000100 /* Reduced MII Logic Current Speed */
+//#define SUPP_RES_RMII 0x00000800 /* Reset Reduced MII Logic */
+#define SUPP_RES_RMII 0x00000000 /* Reset Reduced MII Logic */
+
+/* Test Register */
+#define TEST_SHCUT_PQUANTA 0x00000001 /* Shortcut Pause Quanta */
+#define TEST_TST_PAUSE 0x00000002 /* Test Pause */
+#define TEST_TST_BACKP 0x00000004 /* Test Back Pressure */
+
+/* MII Management Configuration Register */
+#define MCFG_SCAN_INC 0x00000001 /* Scan Increment PHY Address */
+#define MCFG_SUPP_PREAM 0x00000002 /* Suppress Preamble */
+#define MCFG_CLK_SEL 0x0000003C /* Clock Select Mask */
+#define MCFG_RES_MII 0x00008000 /* Reset MII Management Hardware */
+
+/* MII Management Command Register */
+#define MCMD_READ 0x00000001 /* MII Read */
+#define MCMD_SCAN 0x00000002 /* MII Scan continuously */
+
+#define MII_WR_TOUT 0x00050000 /* MII Write timeout count */
+#define MII_RD_TOUT 0x00050000 /* MII Read timeout count */
+
+/* MII Management Address Register */
+#define MADR_REG_ADR 0x0000001F /* MII Register Address Mask */
+#define MADR_PHY_ADR 0x00001F00 /* PHY Address Mask */
+
+/* MII Management Indicators Register */
+#define MIND_BUSY 0x00000001 /* MII is Busy */
+#define MIND_SCAN 0x00000002 /* MII Scanning in Progress */
+#define MIND_NOT_VAL 0x00000004 /* MII Read Data not valid */
+#define MIND_MII_LINK_FAIL 0x00000008 /* MII Link Failed */
+
+/* Command Register */
+#define CR_RX_EN 0x00000001 /* Enable Receive */
+#define CR_TX_EN 0x00000002 /* Enable Transmit */
+#define CR_REG_RES 0x00000008 /* Reset Host Registers */
+#define CR_TX_RES 0x00000010 /* Reset Transmit Datapath */
+#define CR_RX_RES 0x00000020 /* Reset Receive Datapath */
+#define CR_PASS_RUNT_FRM 0x00000040 /* Pass Runt Frames */
+#define CR_PASS_RX_FILT 0x00000080 /* Pass RX Filter */
+#define CR_TX_FLOW_CTRL 0x00000100 /* TX Flow Control */
+#define CR_RMII 0x00000200 /* Reduced MII Interface */
+#define CR_FULL_DUP 0x00000400 /* Full Duplex */
+
+/* Status Register */
+#define SR_RX_EN 0x00000001 /* Enable Receive */
+#define SR_TX_EN 0x00000002 /* Enable Transmit */
+
+/* Transmit Status Vector 0 Register */
+#define TSV0_CRC_ERR 0x00000001 /* CRC error */
+#define TSV0_LEN_CHKERR 0x00000002 /* Length Check Error */
+#define TSV0_LEN_OUTRNG 0x00000004 /* Length Out of Range */
+#define TSV0_DONE 0x00000008 /* Tramsmission Completed */
+#define TSV0_MCAST 0x00000010 /* Multicast Destination */
+#define TSV0_BCAST 0x00000020 /* Broadcast Destination */
+#define TSV0_PKT_DEFER 0x00000040 /* Packet Deferred */
+#define TSV0_EXC_DEFER 0x00000080 /* Excessive Packet Deferral */
+#define TSV0_EXC_COLL 0x00000100 /* Excessive Collision */
+#define TSV0_LATE_COLL 0x00000200 /* Late Collision Occured */
+#define TSV0_GIANT 0x00000400 /* Giant Frame */
+#define TSV0_UNDERRUN 0x00000800 /* Buffer Underrun */
+#define TSV0_BYTES 0x0FFFF000 /* Total Bytes Transferred */
+#define TSV0_CTRL_FRAME 0x10000000 /* Control Frame */
+#define TSV0_PAUSE 0x20000000 /* Pause Frame */
+#define TSV0_BACK_PRESS 0x40000000 /* Backpressure Method Applied */
+#define TSV0_VLAN 0x80000000 /* VLAN Frame */
+
+/* Transmit Status Vector 1 Register */
+#define TSV1_BYTE_CNT 0x0000FFFF /* Transmit Byte Count */
+#define TSV1_COLL_CNT 0x000F0000 /* Transmit Collision Count */
+
+/* Receive Status Vector Register */
+#define RSV_BYTE_CNT 0x0000FFFF /* Receive Byte Count */
+#define RSV_PKT_IGNORED 0x00010000 /* Packet Previously Ignored */
+#define RSV_RXDV_SEEN 0x00020000 /* RXDV Event Previously Seen */
+#define RSV_CARR_SEEN 0x00040000 /* Carrier Event Previously Seen */
+#define RSV_REC_CODEV 0x00080000 /* Receive Code Violation */
+#define RSV_CRC_ERR 0x00100000 /* CRC Error */
+#define RSV_LEN_CHKERR 0x00200000 /* Length Check Error */
+#define RSV_LEN_OUTRNG 0x00400000 /* Length Out of Range */
+#define RSV_REC_OK 0x00800000 /* Frame Received OK */
+#define RSV_MCAST 0x01000000 /* Multicast Frame */
+#define RSV_BCAST 0x02000000 /* Broadcast Frame */
+#define RSV_DRIB_NIBB 0x04000000 /* Dribble Nibble */
+#define RSV_CTRL_FRAME 0x08000000 /* Control Frame */
+#define RSV_PAUSE 0x10000000 /* Pause Frame */
+#define RSV_UNSUPP_OPC 0x20000000 /* Unsupported Opcode */
+#define RSV_VLAN 0x40000000 /* VLAN Frame */
+
+/* Flow Control Counter Register */
+#define FCC_MIRR_CNT 0x0000FFFF /* Mirror Counter */
+#define FCC_PAUSE_TIM 0xFFFF0000 /* Pause Timer */
+
+/* Flow Control Status Register */
+#define FCS_MIRR_CNT 0x0000FFFF /* Mirror Counter Current */
+
+/* Receive Filter Control Register */
+#define RFC_UCAST_EN 0x00000001 /* Accept Unicast Frames Enable */
+#define RFC_BCAST_EN 0x00000002 /* Accept Broadcast Frames Enable */
+#define RFC_MCAST_EN 0x00000004 /* Accept Multicast Frames Enable */
+#define RFC_UCAST_HASH_EN 0x00000008 /* Accept Unicast Hash Filter Frames */
+#define RFC_MCAST_HASH_EN 0x00000010 /* Accept Multicast Hash Filter Fram.*/
+#define RFC_PERFECT_EN 0x00000020 /* Accept Perfect Match Enable */
+#define RFC_MAGP_WOL_EN 0x00001000 /* Magic Packet Filter WoL Enable */
+#define RFC_PFILT_WOL_EN 0x00002000 /* Perfect Filter WoL Enable */
+
+/* Receive Filter WoL Status/Clear Registers */
+#define WOL_UCAST 0x00000001 /* Unicast Frame caused WoL */
+#define WOL_BCAST 0x00000002 /* Broadcast Frame caused WoL */
+#define WOL_MCAST 0x00000004 /* Multicast Frame caused WoL */
+#define WOL_UCAST_HASH 0x00000008 /* Unicast Hash Filter Frame WoL */
+#define WOL_MCAST_HASH 0x00000010 /* Multicast Hash Filter Frame WoL */
+#define WOL_PERFECT 0x00000020 /* Perfect Filter WoL */
+#define WOL_RX_FILTER 0x00000080 /* RX Filter caused WoL */
+#define WOL_MAG_PACKET 0x00000100 /* Magic Packet Filter caused WoL */
+
+/* Interrupt Status/Enable/Clear/Set Registers */
+#define INT_RX_OVERRUN 0x00000001 /* Overrun Error in RX Queue */
+#define INT_RX_ERR 0x00000002 /* Receive Error */
+#define INT_RX_FIN 0x00000004 /* RX Finished Process Descriptors */
+#define INT_RX_DONE 0x00000008 /* Receive Done */
+#define INT_TX_UNDERRUN 0x00000010 /* Transmit Underrun */
+#define INT_TX_ERR 0x00000020 /* Transmit Error */
+#define INT_TX_FIN 0x00000040 /* TX Finished Process Descriptors */
+#define INT_TX_DONE 0x00000080 /* Transmit Done */
+#define INT_SOFT_INT 0x00001000 /* Software Triggered Interrupt */
+#define INT_WAKEUP 0x00002000 /* Wakeup Event Interrupt */
+
+/* Power Down Register */
+#define PD_POWER_DOWN 0x80000000 /* Power Down MAC */
+
+/* RX Descriptor Control Word */
+#define RCTRL_SIZE 0x000007FF /* Buffer size mask */
+#define RCTRL_INT 0x80000000 /* Generate RxDone Interrupt */
+
+/* RX Status Hash CRC Word */
+#define RHASH_SA 0x000001FF /* Hash CRC for Source Address */
+#define RHASH_DA 0x001FF000 /* Hash CRC for Destination Address */
+
+/* RX Status Information Word */
+#define RINFO_SIZE 0x000007FF /* Data size in bytes */
+#define RINFO_CTRL_FRAME 0x00040000 /* Control Frame */
+#define RINFO_VLAN 0x00080000 /* VLAN Frame */
+#define RINFO_FAIL_FILT 0x00100000 /* RX Filter Failed */
+#define RINFO_MCAST 0x00200000 /* Multicast Frame */
+#define RINFO_BCAST 0x00400000 /* Broadcast Frame */
+#define RINFO_CRC_ERR 0x00800000 /* CRC Error in Frame */
+#define RINFO_SYM_ERR 0x01000000 /* Symbol Error from PHY */
+#define RINFO_LEN_ERR 0x02000000 /* Length Error */
+#define RINFO_RANGE_ERR 0x04000000 /* Range Error (exceeded max. size) */
+#define RINFO_ALIGN_ERR 0x08000000 /* Alignment Error */
+#define RINFO_OVERRUN 0x10000000 /* Receive overrun */
+#define RINFO_NO_DESCR 0x20000000 /* No new Descriptor available */
+#define RINFO_LAST_FLAG 0x40000000 /* Last Fragment in Frame */
+#define RINFO_ERR 0x80000000 /* Error Occured (OR of all errors) */
+
+//#define RINFO_ERR_MASK (RINFO_FAIL_FILT | RINFO_CRC_ERR | RINFO_SYM_ERR | RINFO_LEN_ERR | RINFO_ALIGN_ERR | RINFO_OVERRUN)
+#define RINFO_ERR_MASK (RINFO_FAIL_FILT | RINFO_SYM_ERR | \
+ RINFO_LEN_ERR | RINFO_ALIGN_ERR | RINFO_OVERRUN)
+
+
+/* TX Descriptor Control Word */
+#define TCTRL_SIZE 0x000007FF /* Size of data buffer in bytes */
+#define TCTRL_OVERRIDE 0x04000000 /* Override Default MAC Registers */
+#define TCTRL_HUGE 0x08000000 /* Enable Huge Frame */
+#define TCTRL_PAD 0x10000000 /* Pad short Frames to 64 bytes */
+#define TCTRL_CRC 0x20000000 /* Append a hardware CRC to Frame */
+#define TCTRL_LAST 0x40000000 /* Last Descriptor for TX Frame */
+#define TCTRL_INT 0x80000000 /* Generate TxDone Interrupt */
+
+/* TX Status Information Word */
+#define TINFO_COL_CNT 0x01E00000 /* Collision Count */
+#define TINFO_DEFER 0x02000000 /* Packet Deferred (not an error) */
+#define TINFO_EXCESS_DEF 0x04000000 /* Excessive Deferral */
+#define TINFO_EXCESS_COL 0x08000000 /* Excessive Collision */
+#define TINFO_LATE_COL 0x10000000 /* Late Collision Occured */
+#define TINFO_UNDERRUN 0x20000000 /* Transmit Underrun */
+#define TINFO_NO_DESCR 0x40000000 /* No new Descriptor available */
+#define TINFO_ERR 0x80000000 /* Error Occured (OR of all errors) */
+
+/* ENET Device Revision ID */
+#define OLD_EMAC_MODULE_ID 0x39022000 /* Rev. ID for first rev '-' */
+
+/* DP83848C PHY Registers */
+#define PHY_REG_BMCR 0x00 /* Basic Mode Control Register */
+#define PHY_REG_BMSR 0x01 /* Basic Mode Status Register */
+#define PHY_REG_IDR1 0x02 /* PHY Identifier 1 */
+#define PHY_REG_IDR2 0x03 /* PHY Identifier 2 */
+#define PHY_REG_ANAR 0x04 /* Auto-Negotiation Advertisement */
+#define PHY_REG_ANLPAR 0x05 /* Auto-Neg. Link Partner Abitily */
+#define PHY_REG_ANER 0x06 /* Auto-Neg. Expansion Register */
+#define PHY_REG_ANNPTR 0x07 /* Auto-Neg. Next Page TX */
+
+/* PHY Extended Registers */
+#define PHY_REG_STS 0x10 /* Status Register */
+#define PHY_REG_MICR 0x11 /* MII Interrupt Control Register */
+#define PHY_REG_MISR 0x12 /* MII Interrupt Status Register */
+#define PHY_REG_FCSCR 0x14 /* False Carrier Sense Counter */
+#define PHY_REG_RECR 0x15 /* Receive Error Counter */
+#define PHY_REG_PCSR 0x16 /* PCS Sublayer Config. and Status */
+#define PHY_REG_RBR 0x17 /* RMII and Bypass Register */
+#define PHY_REG_LEDCR 0x18 /* LED Direct Control Register */
+#define PHY_REG_PHYCR 0x19 /* PHY Control Register */
+#define PHY_REG_10BTSCR 0x1A /* 10Base-T Status/Control Register */
+#define PHY_REG_CDCTRL1 0x1B /* CD Test Control and BIST Extens. */
+#define PHY_REG_EDCR 0x1D /* Energy Detect Control Register */
+
+#define PHY_REG_SCSR 0x1F /* PHY Special Control/Status Register */
+
+#define PHY_FULLD_100M 0x2100 /* Full Duplex 100Mbit */
+#define PHY_HALFD_100M 0x2000 /* Half Duplex 100Mbit */
+#define PHY_FULLD_10M 0x0100 /* Full Duplex 10Mbit */
+#define PHY_HALFD_10M 0x0000 /* Half Duplex 10MBit */
+#define PHY_AUTO_NEG 0x3000 /* Select Auto Negotiation */
+
+#define DP83848C_DEF_ADR 0x0100 /* Default PHY device address */
+#define DP83848C_ID 0x20005C90 /* PHY Identifier - DP83848C */
+
+#define LAN8720_ID 0x0007C0F0 /* PHY Identifier - LAN8720 */
+
+#define PHY_STS_LINK 0x0001 /* PHY Status Link Mask */
+#define PHY_STS_SPEED 0x0002 /* PHY Status Speed Mask */
+#define PHY_STS_DUPLEX 0x0004 /* PHY Status Duplex Mask */
+
+#define PHY_BMCR_RESET 0x8000 /* PHY Reset */
+
+#define PHY_BMSR_LINK 0x0004 /* PHY BMSR Link valid */
+
+#define PHY_SCSR_100MBIT 0x0008 /* Speed: 1=100 MBit, 0=10Mbit */
+#define PHY_SCSR_DUPLEX 0x0010 /* PHY Duplex Mask */
+
+
+static int phy_read(unsigned int PhyReg);
+static int phy_write(unsigned int PhyReg, unsigned short Data);
+
+static void txdscr_init(void);
+static void rxdscr_init(void);
+
+#if defined (__ICCARM__)
+# define AHBSRAM1
+#elif defined(TOOLCHAIN_GCC_CR)
+# define AHBSRAM1 __attribute__((section(".data.$RamPeriph32")))
+#else
+# define AHBSRAM1 __attribute__((section("AHBSRAM1"),aligned))
+#endif
+
+AHBSRAM1 volatile uint8_t rxbuf[NUM_RX_FRAG][ETH_FRAG_SIZE];
+AHBSRAM1 volatile uint8_t txbuf[NUM_TX_FRAG][ETH_FRAG_SIZE];
+AHBSRAM1 volatile RX_DESC_TypeDef rxdesc[NUM_RX_FRAG];
+AHBSRAM1 volatile RX_STAT_TypeDef rxstat[NUM_RX_FRAG];
+AHBSRAM1 volatile TX_DESC_TypeDef txdesc[NUM_TX_FRAG];
+AHBSRAM1 volatile TX_STAT_TypeDef txstat[NUM_TX_FRAG];
+
+
+#if NEW_LOGIC
+static int rx_consume_offset = -1;
+static int tx_produce_offset = -1;
+#else
+static int send_doff = 0;
+static int send_idx = -1;
+static int send_size = 0;
+
+static int receive_soff = 0;
+static int receive_idx = -1;
+#endif
+
+static uint32_t phy_id = 0;
+
+static inline int rinc(int idx, int mod) {
+ ++idx;
+ idx %= mod;
+ return idx;
+}
+
+//extern unsigned int SystemFrequency;
+static inline unsigned int clockselect() {
+ if(SystemCoreClock < 10000000) {
+ return 1;
+ } else if(SystemCoreClock < 15000000) {
+ return 2;
+ } else if(SystemCoreClock < 20000000) {
+ return 3;
+ } else if(SystemCoreClock < 25000000) {
+ return 4;
+ } else if(SystemCoreClock < 35000000) {
+ return 5;
+ } else if(SystemCoreClock < 50000000) {
+ return 6;
+ } else if(SystemCoreClock < 70000000) {
+ return 7;
+ } else if(SystemCoreClock < 80000000) {
+ return 8;
+ } else if(SystemCoreClock < 90000000) {
+ return 9;
+ } else if(SystemCoreClock < 100000000) {
+ return 10;
+ } else if(SystemCoreClock < 120000000) {
+ return 11;
+ } else if(SystemCoreClock < 130000000) {
+ return 12;
+ } else if(SystemCoreClock < 140000000) {
+ return 13;
+ } else if(SystemCoreClock < 150000000) {
+ return 15;
+ } else if(SystemCoreClock < 160000000) {
+ return 16;
+ } else {
+ return 0;
+ }
+}
+
+#ifndef min
+#define min(x, y) (((x)<(y))?(x):(y))
+#endif
+
+/*----------------------------------------------------------------------------
+ Ethernet Device initialize
+ *----------------------------------------------------------------------------*/
+int ethernet_init() {
+ int regv, tout;
+ char mac[ETHERNET_ADDR_SIZE];
+ unsigned int clock = clockselect();
+
+ LPC_SC->PCONP |= 0x40000000; /* Power Up the EMAC controller. */
+
+ LPC_PINCON->PINSEL2 = 0x50150105; /* Enable P1 Ethernet Pins. */
+ LPC_PINCON->PINSEL3 = (LPC_PINCON->PINSEL3 & ~0x0000000F) | 0x00000005;
+
+ /* Reset all EMAC internal modules. */
+ LPC_EMAC->MAC1 = MAC1_RES_TX | MAC1_RES_MCS_TX | MAC1_RES_RX |
+ MAC1_RES_MCS_RX | MAC1_SIM_RES | MAC1_SOFT_RES;
+ LPC_EMAC->Command = CR_REG_RES | CR_TX_RES | CR_RX_RES | CR_PASS_RUNT_FRM;
+
+ for(tout = 100; tout; tout--) __NOP(); /* A short delay after reset. */
+
+ LPC_EMAC->MAC1 = MAC1_PASS_ALL; /* Initialize MAC control registers. */
+ LPC_EMAC->MAC2 = MAC2_CRC_EN | MAC2_PAD_EN;
+ LPC_EMAC->MAXF = ETH_MAX_FLEN;
+ LPC_EMAC->CLRT = CLRT_DEF;
+ LPC_EMAC->IPGR = IPGR_DEF;
+
+ LPC_EMAC->Command = CR_RMII | CR_PASS_RUNT_FRM; /* Enable Reduced MII interface. */
+
+ LPC_EMAC->MCFG = (clock << 0x2) & MCFG_CLK_SEL; /* Set clock */
+ LPC_EMAC->MCFG |= MCFG_RES_MII; /* and reset */
+
+ for(tout = 100; tout; tout--) __NOP(); /* A short delay */
+
+ LPC_EMAC->MCFG = (clock << 0x2) & MCFG_CLK_SEL;
+ LPC_EMAC->MCMD = 0;
+
+ LPC_EMAC->SUPP = SUPP_RES_RMII; /* Reset Reduced MII Logic. */
+
+ for (tout = 100; tout; tout--) __NOP(); /* A short delay */
+
+ LPC_EMAC->SUPP = 0;
+
+ phy_write(PHY_REG_BMCR, PHY_BMCR_RESET); /* perform PHY reset */
+ for(tout = 0x20000; ; tout--) { /* Wait for hardware reset to end. */
+ regv = phy_read(PHY_REG_BMCR);
+ if(regv < 0 || tout == 0) {
+ return -1; /* Error */
+ }
+ if(!(regv & PHY_BMCR_RESET)) {
+ break; /* Reset complete. */
+ }
+ }
+
+ phy_id = (phy_read(PHY_REG_IDR1) << 16);
+ phy_id |= (phy_read(PHY_REG_IDR2) & 0XFFF0);
+
+ if (phy_id != DP83848C_ID && phy_id != LAN8720_ID) {
+ error("Unknown Ethernet PHY (%x)", (unsigned int)phy_id);
+ }
+
+ ethernet_set_link(-1, 0);
+
+ /* Set the Ethernet MAC Address registers */
+ ethernet_address(mac);
+ LPC_EMAC->SA0 = ((uint32_t)mac[5] << 8) | (uint32_t)mac[4];
+ LPC_EMAC->SA1 = ((uint32_t)mac[3] << 8) | (uint32_t)mac[2];
+ LPC_EMAC->SA2 = ((uint32_t)mac[1] << 8) | (uint32_t)mac[0];
+
+ txdscr_init(); /* initialize DMA TX Descriptor */
+ rxdscr_init(); /* initialize DMA RX Descriptor */
+
+ LPC_EMAC->RxFilterCtrl = RFC_UCAST_EN | RFC_MCAST_EN | RFC_BCAST_EN | RFC_PERFECT_EN;
+ /* Receive Broadcast, Perfect Match Packets */
+
+ LPC_EMAC->IntEnable = INT_RX_DONE | INT_TX_DONE; /* Enable EMAC interrupts. */
+ LPC_EMAC->IntClear = 0xFFFF; /* Reset all interrupts */
+
+
+ LPC_EMAC->Command |= (CR_RX_EN | CR_TX_EN); /* Enable receive and transmit mode of MAC Ethernet core */
+ LPC_EMAC->MAC1 |= MAC1_REC_EN;
+
+#if NEW_LOGIC
+ rx_consume_offset = -1;
+ tx_produce_offset = -1;
+#else
+ send_doff = 0;
+ send_idx = -1;
+ send_size = 0;
+
+ receive_soff = 0;
+ receive_idx = -1;
+#endif
+
+ return 0;
+}
+
+/*----------------------------------------------------------------------------
+ Ethernet Device Uninitialize
+ *----------------------------------------------------------------------------*/
+void ethernet_free() {
+ LPC_EMAC->IntEnable &= ~(INT_RX_DONE | INT_TX_DONE);
+ LPC_EMAC->IntClear = 0xFFFF;
+
+ LPC_SC->PCONP &= ~0x40000000; /* Power down the EMAC controller. */
+
+ LPC_PINCON->PINSEL2 &= ~0x50150105; /* Disable P1 ethernet pins. */
+ LPC_PINCON->PINSEL3 = (LPC_PINCON->PINSEL3 & ~0x0000000F) | 0x00000000;
+}
+
+// if(TxProduceIndex == TxConsumeIndex) buffer array is empty
+// if(TxProduceIndex == TxConsumeIndex - 1) buffer is full, should not fill
+// TxProduceIndex - The buffer that will/is being fileld by driver, s/w increment
+// TxConsumeIndex - The buffer that will/is beign sent by hardware
+
+int ethernet_write(const char *data, int slen) {
+
+#if NEW_LOGIC
+
+ if(tx_produce_offset < 0) { // mark as active if not already
+ tx_produce_offset = 0;
+ }
+
+ int index = LPC_EMAC->TxProduceIndex;
+
+ int remaining = ETH_MAX_FLEN - tx_produce_offset - 4; // bytes written plus checksum
+ int requested = slen;
+ int ncopy = min(remaining, requested);
+
+ void *pdst = (void *)(txdesc[index].Packet + tx_produce_offset);
+ void *psrc = (void *)(data);
+
+ if(ncopy > 0 ){
+ if(data != NULL) {
+ memcpy(pdst, psrc, ncopy);
+ } else {
+ memset(pdst, 0, ncopy);
+ }
+ }
+
+ tx_produce_offset += ncopy;
+
+ return ncopy;
+
+#else
+ void *pdst, *psrc;
+ const int dlen = ETH_FRAG_SIZE;
+ int copy = 0;
+ int soff = 0;
+
+ if(send_idx == -1) {
+ send_idx = LPC_EMAC->TxProduceIndex;
+ }
+
+ if(slen + send_doff > ethernet_MTU_SIZE) {
+ return -1;
+ }
+
+ do {
+ copy = min(slen - soff, dlen - send_doff);
+ pdst = (void *)(txdesc[send_idx].Packet + send_doff);
+ psrc = (void *)(data + soff);
+ if(send_doff + copy > ETH_FRAG_SIZE) {
+ txdesc[send_idx].Ctrl = (send_doff-1) | (TCTRL_INT);
+ send_idx = rinc(send_idx, NUM_TX_FRAG);
+ send_doff = 0;
+ }
+
+ if(data != NULL) {
+ memcpy(pdst, psrc, copy);
+ } else {
+ memset(pdst, 0, copy);
+ }
+
+ soff += copy;
+ send_doff += copy;
+ send_size += copy;
+ } while(soff != slen);
+
+ return soff;
+#endif
+}
+
+int ethernet_send() {
+
+#if NEW_LOGIC
+ if(tx_produce_offset < 0) { // no buffer active
+ return -1;
+ }
+
+ // ensure there is a link
+ if(!ethernet_link()) {
+ return -2;
+ }
+
+ // we have been writing in to a buffer, so finalise it
+ int size = tx_produce_offset;
+ int index = LPC_EMAC->TxProduceIndex;
+ txdesc[index].Ctrl = (tx_produce_offset-1) | (TCTRL_INT | TCTRL_LAST);
+
+ // Increment ProduceIndex to allow it to be sent
+ // We can only do this if the next slot is free
+ int next = rinc(index, NUM_TX_FRAG);
+ while(next == LPC_EMAC->TxConsumeIndex) {
+ for(int i=0; i<1000; i++) { __NOP(); }
+ }
+
+ LPC_EMAC->TxProduceIndex = next;
+ tx_produce_offset = -1;
+ return size;
+
+#else
+ int s = send_size;
+ txdesc[send_idx].Ctrl = (send_doff-1) | (TCTRL_INT | TCTRL_LAST);
+ send_idx = rinc(send_idx, NUM_TX_FRAG);
+ LPC_EMAC->TxProduceIndex = send_idx;
+ send_doff = 0;
+ send_idx = -1;
+ send_size = 0;
+ return s;
+#endif
+}
+
+// RxConsmeIndex - The index of buffer the driver will/is reading from. Driver should inc once read
+// RxProduceIndex - The index of buffer that will/is being filled by MAC. H/w will inc once rxd
+//
+// if(RxConsumeIndex == RxProduceIndex) buffer array is empty
+// if(RxConsumeIndex == RxProduceIndex + 1) buffer array is full
+
+// Recevies an arrived ethernet packet.
+// Receiving an ethernet packet will drop the last received ethernet packet
+// and make a new ethernet packet ready to read.
+// Returns size of packet, else 0 if nothing to receive
+
+// We read from RxConsumeIndex from position rx_consume_offset
+// if rx_consume_offset < 0, then we have not recieved the RxConsumeIndex packet for reading
+// rx_consume_offset = -1 // no frame
+// rx_consume_offset = 0 // start of frame
+// Assumption: A fragment should alway be a whole frame
+
+int ethernet_receive() {
+#if NEW_LOGIC
+
+ // if we are currently reading a valid RxConsume buffer, increment to the next one
+ if(rx_consume_offset >= 0) {
+ LPC_EMAC->RxConsumeIndex = rinc(LPC_EMAC->RxConsumeIndex, NUM_RX_FRAG);
+ }
+
+ // if the buffer is empty, mark it as no valid buffer
+ if(LPC_EMAC->RxConsumeIndex == LPC_EMAC->RxProduceIndex) {
+ rx_consume_offset = -1;
+ return 0;
+ }
+
+ uint32_t info = rxstat[LPC_EMAC->RxConsumeIndex].Info;
+ rx_consume_offset = 0;
+
+ // check if it is not marked as last or for errors
+ if(!(info & RINFO_LAST_FLAG) || (info & RINFO_ERR_MASK)) {
+ return -1;
+ }
+
+ int size = (info & RINFO_SIZE) + 1;
+ return size - 4; // don't include checksum bytes
+
+#else
+ if(receive_idx == -1) {
+ receive_idx = LPC_EMAC->RxConsumeIndex;
+ } else {
+ while(!(rxstat[receive_idx].Info & RINFO_LAST_FLAG) && ((uint32_t)receive_idx != LPC_EMAC->RxProduceIndex)) {
+ receive_idx = rinc(receive_idx, NUM_RX_FRAG);
+ }
+ unsigned int info = rxstat[receive_idx].Info;
+ int slen = (info & RINFO_SIZE) + 1;
+
+ if(slen > ethernet_MTU_SIZE || (info & RINFO_ERR_MASK)) {
+ /* Invalid frame, ignore it and free buffer. */
+ receive_idx = rinc(receive_idx, NUM_RX_FRAG);
+ }
+ receive_idx = rinc(receive_idx, NUM_RX_FRAG);
+ receive_soff = 0;
+
+ LPC_EMAC->RxConsumeIndex = receive_idx;
+ }
+
+ if((uint32_t)receive_idx == LPC_EMAC->RxProduceIndex) {
+ receive_idx = -1;
+ return 0;
+ }
+
+ return (rxstat[receive_idx].Info & RINFO_SIZE) - 3;
+#endif
+}
+
+// Read from an recevied ethernet packet.
+// After receive returnd a number bigger than 0 it is
+// possible to read bytes from this packet.
+// Read will write up to size bytes into data.
+// It is possible to use read multible times.
+// Each time read will start reading after the last read byte before.
+
+int ethernet_read(char *data, int dlen) {
+#if NEW_LOGIC
+ // Check we have a valid buffer to read
+ if(rx_consume_offset < 0) {
+ return 0;
+ }
+
+ // Assume 1 fragment block
+ uint32_t info = rxstat[LPC_EMAC->RxConsumeIndex].Info;
+ int size = (info & RINFO_SIZE) + 1 - 4; // exclude checksum
+
+ int remaining = size - rx_consume_offset;
+ int requested = dlen;
+ int ncopy = min(remaining, requested);
+
+ void *psrc = (void *)(rxdesc[LPC_EMAC->RxConsumeIndex].Packet + rx_consume_offset);
+ void *pdst = (void *)(data);
+
+ if(data != NULL && ncopy > 0) {
+ memcpy(pdst, psrc, ncopy);
+ }
+
+ rx_consume_offset += ncopy;
+
+ return ncopy;
+#else
+ int slen;
+ int copy = 0;
+ unsigned int more;
+ unsigned int info;
+ void *pdst, *psrc;
+ int doff = 0;
+
+ if((uint32_t)receive_idx == LPC_EMAC->RxProduceIndex || receive_idx == -1) {
+ return 0;
+ }
+
+ do {
+ info = rxstat[receive_idx].Info;
+ more = !(info & RINFO_LAST_FLAG);
+ slen = (info & RINFO_SIZE) + 1;
+
+ if(slen > ethernet_MTU_SIZE || (info & RINFO_ERR_MASK)) {
+ /* Invalid frame, ignore it and free buffer. */
+ receive_idx = rinc(receive_idx, NUM_RX_FRAG);
+ } else {
+
+ copy = min(slen - receive_soff, dlen - doff);
+ psrc = (void *)(rxdesc[receive_idx].Packet + receive_soff);
+ pdst = (void *)(data + doff);
+
+ if(data != NULL) {
+ /* check if Buffer available */
+ memcpy(pdst, psrc, copy);
+ }
+
+ receive_soff += copy;
+ doff += copy;
+
+ if((more && (receive_soff == slen))) {
+ receive_idx = rinc(receive_idx, NUM_RX_FRAG);
+ receive_soff = 0;
+ }
+ }
+ } while(more && !(doff == dlen) && !receive_soff);
+
+ return doff;
+#endif
+}
+
+int ethernet_link(void) {
+
+ if (phy_id == DP83848C_ID) {
+ return (phy_read(PHY_REG_STS) & PHY_STS_LINK);
+ }
+ else { // LAN8720_ID
+ return (phy_read(PHY_REG_BMSR) & PHY_BMSR_LINK);
+ }
+}
+
+static int phy_write(unsigned int PhyReg, unsigned short Data) {
+ unsigned int timeOut;
+
+ LPC_EMAC->MADR = DP83848C_DEF_ADR | PhyReg;
+ LPC_EMAC->MWTD = Data;
+
+ for(timeOut = 0; timeOut < MII_WR_TOUT; timeOut++) { /* Wait until operation completed */
+ if((LPC_EMAC->MIND & MIND_BUSY) == 0) {
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+
+static int phy_read(unsigned int PhyReg) {
+ unsigned int timeOut;
+
+ LPC_EMAC->MADR = DP83848C_DEF_ADR | PhyReg;
+ LPC_EMAC->MCMD = MCMD_READ;
+
+ for(timeOut = 0; timeOut < MII_RD_TOUT; timeOut++) { /* Wait until operation completed */
+ if((LPC_EMAC->MIND & MIND_BUSY) == 0) {
+ LPC_EMAC->MCMD = 0;
+ return LPC_EMAC->MRDD; /* Return a 16-bit value. */
+ }
+ }
+
+ return -1;
+}
+
+
+static void txdscr_init() {
+ int i;
+
+ for(i = 0; i < NUM_TX_FRAG; i++) {
+ txdesc[i].Packet = (uint32_t)&txbuf[i];
+ txdesc[i].Ctrl = 0;
+ txstat[i].Info = 0;
+ }
+
+ LPC_EMAC->TxDescriptor = (uint32_t)txdesc; /* Set EMAC Transmit Descriptor Registers. */
+ LPC_EMAC->TxStatus = (uint32_t)txstat;
+ LPC_EMAC->TxDescriptorNumber = NUM_TX_FRAG-1;
+
+ LPC_EMAC->TxProduceIndex = 0; /* Tx Descriptors Point to 0 */
+}
+
+
+static void rxdscr_init() {
+ int i;
+
+ for(i = 0; i < NUM_RX_FRAG; i++) {
+ rxdesc[i].Packet = (uint32_t)&rxbuf[i];
+ rxdesc[i].Ctrl = RCTRL_INT | (ETH_FRAG_SIZE-1);
+ rxstat[i].Info = 0;
+ rxstat[i].HashCRC = 0;
+ }
+
+ LPC_EMAC->RxDescriptor = (uint32_t)rxdesc; /* Set EMAC Receive Descriptor Registers. */
+ LPC_EMAC->RxStatus = (uint32_t)rxstat;
+ LPC_EMAC->RxDescriptorNumber = NUM_RX_FRAG-1;
+
+ LPC_EMAC->RxConsumeIndex = 0; /* Rx Descriptors Point to 0 */
+}
+
+void ethernet_address(char *mac) {
+ mbed_mac_address(mac);
+}
+
+void ethernet_set_link(int speed, int duplex) {
+ unsigned short phy_data;
+ int tout;
+
+ if((speed < 0) || (speed > 1)) {
+
+ phy_data = PHY_AUTO_NEG;
+
+ } else {
+
+ phy_data = (((unsigned short) speed << 13) |
+ ((unsigned short) duplex << 8));
+ }
+
+ phy_write(PHY_REG_BMCR, phy_data);
+
+ for(tout = 100; tout; tout--) { __NOP(); } /* A short delay */
+
+ switch(phy_id) {
+ case DP83848C_ID:
+
+ phy_data = phy_read(PHY_REG_STS);
+
+ if(phy_data & PHY_STS_DUPLEX) {
+ LPC_EMAC->MAC2 |= MAC2_FULL_DUP;
+ LPC_EMAC->Command |= CR_FULL_DUP;
+ LPC_EMAC->IPGT = IPGT_FULL_DUP;
+ } else {
+ LPC_EMAC->MAC2 &= ~MAC2_FULL_DUP;
+ LPC_EMAC->Command &= ~CR_FULL_DUP;
+ LPC_EMAC->IPGT = IPGT_HALF_DUP;
+ }
+
+ if(phy_data & PHY_STS_SPEED) {
+ LPC_EMAC->SUPP &= ~SUPP_SPEED;
+ } else {
+ LPC_EMAC->SUPP |= SUPP_SPEED;
+ }
+
+
+ break;
+ case LAN8720_ID:
+
+ phy_data = phy_read(PHY_REG_SCSR);
+
+ if (phy_data & PHY_SCSR_DUPLEX) {
+ LPC_EMAC->MAC2 |= MAC2_FULL_DUP;
+ LPC_EMAC->Command |= CR_FULL_DUP;
+ LPC_EMAC->IPGT = IPGT_FULL_DUP;
+ } else {
+ LPC_EMAC->Command &= ~CR_FULL_DUP;
+ LPC_EMAC->IPGT = IPGT_HALF_DUP;
+ }
+
+ if(phy_data & PHY_SCSR_100MBIT) {
+ LPC_EMAC->SUPP |= SUPP_SPEED;
+ } else {
+ LPC_EMAC->SUPP &= ~SUPP_SPEED;
+ }
+
+
+ break;
+ }
+
+
+}