David Smart / lwip-eth

minor derivative to reduce compiler warnings and tag read-only parameters as const.

Dependents:   EthernetInterface

Fork of lwip-eth by mbed official

arch/TARGET_NXP/lpc_phy_dp83848.c@28:dd496edab2cc, 2015-07-07 (annotated)

Committer:
WiredHome
Date:
Tue Jul 07 14:08:52 2015 +0000
Revision:
28:dd496edab2cc
Parent:
10:ab9330955226 
Eliminate 2 compiler warnings by initializing values

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 10:ab9330955226 1 /**********************************************************************
mbed_official 10:ab9330955226 2 * $Id$ lpc_phy_dp83848.c 2011-11-20
mbed_official 10:ab9330955226 3 *//**
mbed_official 10:ab9330955226 4 * @file lpc_phy_dp83848.c
mbed_official 10:ab9330955226 5 * @brief DP83848C PHY status and control.
mbed_official 10:ab9330955226 6 * @version 1.0
mbed_official 10:ab9330955226 7 * @date 20 Nov. 2011
mbed_official 10:ab9330955226 8 * @author NXP MCU SW Application Team
mbed_official 10:ab9330955226 9 *
mbed_official 10:ab9330955226 10 * Copyright(C) 2011, NXP Semiconductor
mbed_official 10:ab9330955226 11 * All rights reserved.
mbed_official 10:ab9330955226 12 *
mbed_official 10:ab9330955226 13 ***********************************************************************
mbed_official 10:ab9330955226 14 * Software that is described herein is for illustrative purposes only
mbed_official 10:ab9330955226 15 * which provides customers with programming information regarding the
mbed_official 10:ab9330955226 16 * products. This software is supplied "AS IS" without any warranties.
mbed_official 10:ab9330955226 17 * NXP Semiconductors assumes no responsibility or liability for the
mbed_official 10:ab9330955226 18 * use of the software, conveys no license or title under any patent,
mbed_official 10:ab9330955226 19 * copyright, or mask work right to the product. NXP Semiconductors
mbed_official 10:ab9330955226 20 * reserves the right to make changes in the software without
mbed_official 10:ab9330955226 21 * notification. NXP Semiconductors also make no representation or
mbed_official 10:ab9330955226 22 * warranty that such application will be suitable for the specified
mbed_official 10:ab9330955226 23 * use without further testing or modification.
mbed_official 10:ab9330955226 24 **********************************************************************/
mbed_official 10:ab9330955226 25
mbed_official 10:ab9330955226 26 #include "lwip/opt.h"
mbed_official 10:ab9330955226 27 #include "lwip/err.h"
mbed_official 10:ab9330955226 28 #include "lwip/tcpip.h"
mbed_official 10:ab9330955226 29 #include "lwip/snmp.h"
mbed_official 10:ab9330955226 30 #include "lpc_emac_config.h"
mbed_official 10:ab9330955226 31 #include "lpc_phy.h"
mbed_official 10:ab9330955226 32 #include "lpc17xx_emac.h"
mbed_official 10:ab9330955226 33
mbed_official 10:ab9330955226 34 /** @defgroup dp83848_phy PHY status and control for the DP83848.
mbed_official 10:ab9330955226 35 * @ingroup lwip_phy
mbed_official 10:ab9330955226 36 *
mbed_official 10:ab9330955226 37 * Various functions for controlling and monitoring the status of the
mbed_official 10:ab9330955226 38 * DP83848 PHY. In polled (standalone) systems, the PHY state must be
mbed_official 10:ab9330955226 39 * monitored as part of the application. In a threaded (RTOS) system,
mbed_official 10:ab9330955226 40 * the PHY state is monitored by the PHY handler thread. The MAC
mbed_official 10:ab9330955226 41 * driver will not transmit unless the PHY link is active.
mbed_official 10:ab9330955226 42 * @{
mbed_official 10:ab9330955226 43 */
mbed_official 10:ab9330955226 44
mbed_official 10:ab9330955226 45 /** \brief DP83848 PHY register offsets */
mbed_official 10:ab9330955226 46 #define DP8_BMCR_REG 0x0 /**< Basic Mode Control Register */
mbed_official 10:ab9330955226 47 #define DP8_BMSR_REG 0x1 /**< Basic Mode Status Reg */
mbed_official 10:ab9330955226 48 #define DP8_IDR1_REG 0x2 /**< Basic Mode Status Reg */
mbed_official 10:ab9330955226 49 #define DP8_IDR2_REG 0x3 /**< Basic Mode Status Reg */
mbed_official 10:ab9330955226 50 #define DP8_ANADV_REG 0x4 /**< Auto_Neg Advt Reg */
mbed_official 10:ab9330955226 51 #define DP8_ANLPA_REG 0x5 /**< Auto_neg Link Partner Ability Reg */
mbed_official 10:ab9330955226 52 #define DP8_ANEEXP_REG 0x6 /**< Auto-neg Expansion Reg */
mbed_official 10:ab9330955226 53 #define DP8_PHY_STAT_REG 0x10 /**< PHY Status Register */
mbed_official 10:ab9330955226 54 #define DP8_PHY_INT_CTL_REG 0x11 /**< PHY Interrupt Control Register */
mbed_official 10:ab9330955226 55 #define DP8_PHY_RBR_REG 0x17 /**< PHY RMII and Bypass Register */
mbed_official 10:ab9330955226 56 #define DP8_PHY_STS_REG 0x19 /**< PHY Status Register */
mbed_official 10:ab9330955226 57
mbed_official 10:ab9330955226 58 #define DP8_PHY_SCSR_REG 0x1f /**< PHY Special Control/Status Register (LAN8720) */
mbed_official 10:ab9330955226 59
mbed_official 10:ab9330955226 60 /** \brief DP83848 Control register definitions */
mbed_official 10:ab9330955226 61 #define DP8_RESET (1 << 15) /**< 1= S/W Reset */
mbed_official 10:ab9330955226 62 #define DP8_LOOPBACK (1 << 14) /**< 1=loopback Enabled */
mbed_official 10:ab9330955226 63 #define DP8_SPEED_SELECT (1 << 13) /**< 1=Select 100MBps */
mbed_official 10:ab9330955226 64 #define DP8_AUTONEG (1 << 12) /**< 1=Enable auto-negotiation */
mbed_official 10:ab9330955226 65 #define DP8_POWER_DOWN (1 << 11) /**< 1=Power down PHY */
mbed_official 10:ab9330955226 66 #define DP8_ISOLATE (1 << 10) /**< 1=Isolate PHY */
mbed_official 10:ab9330955226 67 #define DP8_RESTART_AUTONEG (1 << 9) /**< 1=Restart auto-negoatiation */
mbed_official 10:ab9330955226 68 #define DP8_DUPLEX_MODE (1 << 8) /**< 1=Full duplex mode */
mbed_official 10:ab9330955226 69 #define DP8_COLLISION_TEST (1 << 7) /**< 1=Perform collsion test */
mbed_official 10:ab9330955226 70
mbed_official 10:ab9330955226 71 /** \brief DP83848 Status register definitions */
mbed_official 10:ab9330955226 72 #define DP8_100BASE_T4 (1 << 15) /**< T4 mode */
mbed_official 10:ab9330955226 73 #define DP8_100BASE_TX_FD (1 << 14) /**< 100MBps full duplex */
mbed_official 10:ab9330955226 74 #define DP8_100BASE_TX_HD (1 << 13) /**< 100MBps half duplex */
mbed_official 10:ab9330955226 75 #define DP8_10BASE_T_FD (1 << 12) /**< 100Bps full duplex */
mbed_official 10:ab9330955226 76 #define DP8_10BASE_T_HD (1 << 11) /**< 10MBps half duplex */
mbed_official 10:ab9330955226 77 #define DP8_MF_PREAMB_SUPPR (1 << 6) /**< Preamble suppress */
mbed_official 10:ab9330955226 78 #define DP8_AUTONEG_COMP (1 << 5) /**< Auto-negotation complete */
mbed_official 10:ab9330955226 79 #define DP8_RMT_FAULT (1 << 4) /**< Fault */
mbed_official 10:ab9330955226 80 #define DP8_AUTONEG_ABILITY (1 << 3) /**< Auto-negotation supported */
mbed_official 10:ab9330955226 81 #define DP8_LINK_STATUS (1 << 2) /**< 1=Link active */
mbed_official 10:ab9330955226 82 #define DP8_JABBER_DETECT (1 << 1) /**< Jabber detect */
mbed_official 10:ab9330955226 83 #define DP8_EXTEND_CAPAB (1 << 0) /**< Supports extended capabilities */
mbed_official 10:ab9330955226 84
mbed_official 10:ab9330955226 85 /** \brief DP83848 PHY RBR MII dode definitions */
mbed_official 10:ab9330955226 86 #define DP8_RBR_RMII_MODE (1 << 5) /**< Use RMII mode */
mbed_official 10:ab9330955226 87
mbed_official 10:ab9330955226 88 /** \brief DP83848 PHY status definitions */
mbed_official 10:ab9330955226 89 #define DP8_REMOTEFAULT (1 << 6) /**< Remote fault */
mbed_official 10:ab9330955226 90 #define DP8_FULLDUPLEX (1 << 2) /**< 1=full duplex */
mbed_official 10:ab9330955226 91 #define DP8_SPEED10MBPS (1 << 1) /**< 1=10MBps speed */
mbed_official 10:ab9330955226 92 #define DP8_VALID_LINK (1 << 0) /**< 1=Link active */
mbed_official 10:ab9330955226 93
mbed_official 10:ab9330955226 94 /** \brief DP83848 PHY ID register definitions */
mbed_official 10:ab9330955226 95 #define DP8_PHYID1_OUI 0x2000 /**< Expected PHY ID1 */
mbed_official 10:ab9330955226 96 #define DP8_PHYID2_OUI 0x5c90 /**< Expected PHY ID2 */
mbed_official 10:ab9330955226 97
mbed_official 10:ab9330955226 98 /** \brief LAN8720 PHY Special Control/Status Register */
mbed_official 10:ab9330955226 99 #define PHY_SCSR_100MBIT 0x0008 /**< Speed: 1=100 MBit, 0=10Mbit */
mbed_official 10:ab9330955226 100 #define PHY_SCSR_DUPLEX 0x0010 /**< PHY Duplex Mask */
mbed_official 10:ab9330955226 101
mbed_official 10:ab9330955226 102 /** \brief Link status bits */
mbed_official 10:ab9330955226 103 #define LNK_STAT_VALID 0x01
mbed_official 10:ab9330955226 104 #define LNK_STAT_FULLDUPLEX 0x02
mbed_official 10:ab9330955226 105 #define LNK_STAT_SPEED10MPS 0x04
mbed_official 10:ab9330955226 106
mbed_official 10:ab9330955226 107 /** \brief PHY ID definitions */
mbed_official 10:ab9330955226 108 #define DP83848C_ID 0x20005C90 /**< PHY Identifier - DP83848C */
mbed_official 10:ab9330955226 109 #define LAN8720_ID 0x0007C0F0 /**< PHY Identifier - LAN8720 */
mbed_official 10:ab9330955226 110
mbed_official 10:ab9330955226 111 /** \brief PHY status structure used to indicate current status of PHY.
mbed_official 10:ab9330955226 112 */
mbed_official 10:ab9330955226 113 typedef struct {
mbed_official 10:ab9330955226 114 u32_t phy_speed_100mbs:1; /**< 10/100 MBS connection speed flag. */
mbed_official 10:ab9330955226 115 u32_t phy_full_duplex:1; /**< Half/full duplex connection speed flag. */
mbed_official 10:ab9330955226 116 u32_t phy_link_active:1; /**< Phy link active flag. */
mbed_official 10:ab9330955226 117 } PHY_STATUS_TYPE;
mbed_official 10:ab9330955226 118
mbed_official 10:ab9330955226 119 /** \brief PHY update flags */
mbed_official 10:ab9330955226 120 static PHY_STATUS_TYPE physts;
mbed_official 10:ab9330955226 121
mbed_official 10:ab9330955226 122 /** \brief Last PHY update flags, used for determing if something has changed */
mbed_official 10:ab9330955226 123 static PHY_STATUS_TYPE olddphysts;
mbed_official 10:ab9330955226 124
mbed_official 10:ab9330955226 125 /** \brief PHY update counter for state machine */
mbed_official 10:ab9330955226 126 static s32_t phyustate;
mbed_official 10:ab9330955226 127
mbed_official 10:ab9330955226 128 /** \brief Holds the PHY ID */
mbed_official 10:ab9330955226 129 static u32_t phy_id;
mbed_official 10:ab9330955226 130
mbed_official 10:ab9330955226 131 /** \brief Temporary holder of link status for LAN7420 */
mbed_official 10:ab9330955226 132 static u32_t phy_lan7420_sts_tmp;
mbed_official 10:ab9330955226 133
mbed_official 10:ab9330955226 134 /* Write a value via the MII link (non-blocking) */
mbed_official 10:ab9330955226 135 void lpc_mii_write_noblock(u32_t PhyReg, u32_t Value)
mbed_official 10:ab9330955226 136 {
mbed_official 10:ab9330955226 137 /* Write value at PHY address and register */
mbed_official 10:ab9330955226 138 LPC_EMAC->MADR = (LPC_PHYDEF_PHYADDR << 8) | PhyReg;
mbed_official 10:ab9330955226 139 LPC_EMAC->MWTD = Value;
mbed_official 10:ab9330955226 140 }
mbed_official 10:ab9330955226 141
mbed_official 10:ab9330955226 142 /* Write a value via the MII link (blocking) */
mbed_official 10:ab9330955226 143 err_t lpc_mii_write(u32_t PhyReg, u32_t Value)
mbed_official 10:ab9330955226 144 {
mbed_official 10:ab9330955226 145 u32_t mst = 250;
mbed_official 10:ab9330955226 146 err_t sts = ERR_OK;
mbed_official 10:ab9330955226 147
mbed_official 10:ab9330955226 148 /* Write value at PHY address and register */
mbed_official 10:ab9330955226 149 lpc_mii_write_noblock(PhyReg, Value);
mbed_official 10:ab9330955226 150
mbed_official 10:ab9330955226 151 /* Wait for unbusy status */
mbed_official 10:ab9330955226 152 while (mst > 0) {
mbed_official 10:ab9330955226 153 sts = LPC_EMAC->MIND;
mbed_official 10:ab9330955226 154 if ((sts & EMAC_MIND_BUSY) == 0)
mbed_official 10:ab9330955226 155 mst = 0;
mbed_official 10:ab9330955226 156 else {
mbed_official 10:ab9330955226 157 mst--;
mbed_official 10:ab9330955226 158 osDelay(1);
mbed_official 10:ab9330955226 159 }
mbed_official 10:ab9330955226 160 }
mbed_official 10:ab9330955226 161
mbed_official 10:ab9330955226 162 if (sts != 0)
mbed_official 10:ab9330955226 163 sts = ERR_TIMEOUT;
mbed_official 10:ab9330955226 164
mbed_official 10:ab9330955226 165 return sts;
mbed_official 10:ab9330955226 166 }
mbed_official 10:ab9330955226 167
mbed_official 10:ab9330955226 168 /* Reads current MII link busy status */
mbed_official 10:ab9330955226 169 u32_t lpc_mii_is_busy(void)
mbed_official 10:ab9330955226 170 {
mbed_official 10:ab9330955226 171 return (u32_t) (LPC_EMAC->MIND & EMAC_MIND_BUSY);
mbed_official 10:ab9330955226 172 }
mbed_official 10:ab9330955226 173
mbed_official 10:ab9330955226 174 /* Starts a read operation via the MII link (non-blocking) */
mbed_official 10:ab9330955226 175 u32_t lpc_mii_read_data(void)
mbed_official 10:ab9330955226 176 {
mbed_official 10:ab9330955226 177 u32_t data = LPC_EMAC->MRDD;
mbed_official 10:ab9330955226 178 LPC_EMAC->MCMD = 0;
mbed_official 10:ab9330955226 179
mbed_official 10:ab9330955226 180 return data;
mbed_official 10:ab9330955226 181 }
mbed_official 10:ab9330955226 182
mbed_official 10:ab9330955226 183 /* Starts a read operation via the MII link (non-blocking) */
mbed_official 10:ab9330955226 184 void lpc_mii_read_noblock(u32_t PhyReg)
mbed_official 10:ab9330955226 185 {
mbed_official 10:ab9330955226 186 /* Read value at PHY address and register */
mbed_official 10:ab9330955226 187 LPC_EMAC->MADR = (LPC_PHYDEF_PHYADDR << 8) | PhyReg;
mbed_official 10:ab9330955226 188 LPC_EMAC->MCMD = EMAC_MCMD_READ;
mbed_official 10:ab9330955226 189 }
mbed_official 10:ab9330955226 190
mbed_official 10:ab9330955226 191 /* Read a value via the MII link (blocking) */
mbed_official 10:ab9330955226 192 err_t lpc_mii_read(u32_t PhyReg, u32_t *data)
mbed_official 10:ab9330955226 193 {
mbed_official 10:ab9330955226 194 u32_t mst = 250;
mbed_official 10:ab9330955226 195 err_t sts = ERR_OK;
mbed_official 10:ab9330955226 196
mbed_official 10:ab9330955226 197 /* Read value at PHY address and register */
mbed_official 10:ab9330955226 198 lpc_mii_read_noblock(PhyReg);
mbed_official 10:ab9330955226 199
mbed_official 10:ab9330955226 200 /* Wait for unbusy status */
mbed_official 10:ab9330955226 201 while (mst > 0) {
mbed_official 10:ab9330955226 202 sts = LPC_EMAC->MIND & ~EMAC_MIND_MII_LINK_FAIL;
mbed_official 10:ab9330955226 203 if ((sts & EMAC_MIND_BUSY) == 0) {
mbed_official 10:ab9330955226 204 mst = 0;
mbed_official 10:ab9330955226 205 *data = LPC_EMAC->MRDD;
mbed_official 10:ab9330955226 206 } else {
mbed_official 10:ab9330955226 207 mst--;
mbed_official 10:ab9330955226 208 osDelay(1);
mbed_official 10:ab9330955226 209 }
mbed_official 10:ab9330955226 210 }
mbed_official 10:ab9330955226 211
mbed_official 10:ab9330955226 212 LPC_EMAC->MCMD = 0;
mbed_official 10:ab9330955226 213
mbed_official 10:ab9330955226 214 if (sts != 0)
mbed_official 10:ab9330955226 215 sts = ERR_TIMEOUT;
mbed_official 10:ab9330955226 216
mbed_official 10:ab9330955226 217 return sts;
mbed_official 10:ab9330955226 218 }
mbed_official 10:ab9330955226 219
mbed_official 10:ab9330955226 220
mbed_official 10:ab9330955226 221
mbed_official 10:ab9330955226 222 /** \brief Update PHY status from passed value
mbed_official 10:ab9330955226 223 *
mbed_official 10:ab9330955226 224 * This function updates the current PHY status based on the
mbed_official 10:ab9330955226 225 * passed PHY status word. The PHY status indicate if the link
mbed_official 10:ab9330955226 226 * is active, the connection speed, and duplex.
mbed_official 10:ab9330955226 227 *
mbed_official 10:ab9330955226 228 * \param[in] netif NETIF structure
mbed_official 10:ab9330955226 229 * \param[in] linksts Status word from PHY
mbed_official 10:ab9330955226 230 * \return 1 if the status has changed, otherwise 0
mbed_official 10:ab9330955226 231 */
mbed_official 10:ab9330955226 232 static s32_t lpc_update_phy_sts(struct netif *netif, u32_t linksts)
mbed_official 10:ab9330955226 233 {
mbed_official 10:ab9330955226 234 s32_t changed = 0;
mbed_official 10:ab9330955226 235
mbed_official 10:ab9330955226 236 /* Update link active status */
mbed_official 10:ab9330955226 237 if (linksts & LNK_STAT_VALID)
mbed_official 10:ab9330955226 238 physts.phy_link_active = 1;
mbed_official 10:ab9330955226 239 else
mbed_official 10:ab9330955226 240 physts.phy_link_active = 0;
mbed_official 10:ab9330955226 241
mbed_official 10:ab9330955226 242 /* Full or half duplex */
mbed_official 10:ab9330955226 243 if (linksts & LNK_STAT_FULLDUPLEX)
mbed_official 10:ab9330955226 244 physts.phy_full_duplex = 1;
mbed_official 10:ab9330955226 245 else
mbed_official 10:ab9330955226 246 physts.phy_full_duplex = 0;
mbed_official 10:ab9330955226 247
mbed_official 10:ab9330955226 248 /* Configure 100MBit/10MBit mode. */
mbed_official 10:ab9330955226 249 if (linksts & LNK_STAT_SPEED10MPS)
mbed_official 10:ab9330955226 250 physts.phy_speed_100mbs = 0;
mbed_official 10:ab9330955226 251 else
mbed_official 10:ab9330955226 252 physts.phy_speed_100mbs = 1;
mbed_official 10:ab9330955226 253
mbed_official 10:ab9330955226 254 if (physts.phy_speed_100mbs != olddphysts.phy_speed_100mbs) {
mbed_official 10:ab9330955226 255 changed = 1;
mbed_official 10:ab9330955226 256 if (physts.phy_speed_100mbs) {
mbed_official 10:ab9330955226 257 /* 100MBit mode. */
mbed_official 10:ab9330955226 258 lpc_emac_set_speed(1);
mbed_official 10:ab9330955226 259
mbed_official 10:ab9330955226 260 NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 100000000);
mbed_official 10:ab9330955226 261 }
mbed_official 10:ab9330955226 262 else {
mbed_official 10:ab9330955226 263 /* 10MBit mode. */
mbed_official 10:ab9330955226 264 lpc_emac_set_speed(0);
mbed_official 10:ab9330955226 265
mbed_official 10:ab9330955226 266 NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 10000000);
mbed_official 10:ab9330955226 267 }
mbed_official 10:ab9330955226 268
mbed_official 10:ab9330955226 269 olddphysts.phy_speed_100mbs = physts.phy_speed_100mbs;
mbed_official 10:ab9330955226 270 }
mbed_official 10:ab9330955226 271
mbed_official 10:ab9330955226 272 if (physts.phy_full_duplex != olddphysts.phy_full_duplex) {
mbed_official 10:ab9330955226 273 changed = 1;
mbed_official 10:ab9330955226 274 if (physts.phy_full_duplex)
mbed_official 10:ab9330955226 275 lpc_emac_set_duplex(1);
mbed_official 10:ab9330955226 276 else
mbed_official 10:ab9330955226 277 lpc_emac_set_duplex(0);
mbed_official 10:ab9330955226 278
mbed_official 10:ab9330955226 279 olddphysts.phy_full_duplex = physts.phy_full_duplex;
mbed_official 10:ab9330955226 280 }
mbed_official 10:ab9330955226 281
mbed_official 10:ab9330955226 282 if (physts.phy_link_active != olddphysts.phy_link_active) {
mbed_official 10:ab9330955226 283 changed = 1;
mbed_official 10:ab9330955226 284 #if NO_SYS == 1
mbed_official 10:ab9330955226 285 if (physts.phy_link_active)
mbed_official 10:ab9330955226 286 netif_set_link_up(netif);
mbed_official 10:ab9330955226 287 else
mbed_official 10:ab9330955226 288 netif_set_link_down(netif);
mbed_official 10:ab9330955226 289 #else
mbed_official 10:ab9330955226 290 if (physts.phy_link_active)
mbed_official 10:ab9330955226 291 tcpip_callback_with_block((tcpip_callback_fn) netif_set_link_up,
mbed_official 10:ab9330955226 292 (void*) netif, 1);
mbed_official 10:ab9330955226 293 else
mbed_official 10:ab9330955226 294 tcpip_callback_with_block((tcpip_callback_fn) netif_set_link_down,
mbed_official 10:ab9330955226 295 (void*) netif, 1);
mbed_official 10:ab9330955226 296 #endif
mbed_official 10:ab9330955226 297
mbed_official 10:ab9330955226 298 olddphysts.phy_link_active = physts.phy_link_active;
mbed_official 10:ab9330955226 299 }
mbed_official 10:ab9330955226 300
mbed_official 10:ab9330955226 301 return changed;
mbed_official 10:ab9330955226 302 }
mbed_official 10:ab9330955226 303
mbed_official 10:ab9330955226 304 /** \brief Initialize the DP83848 PHY.
mbed_official 10:ab9330955226 305 *
mbed_official 10:ab9330955226 306 * This function initializes the DP83848 PHY. It will block until
mbed_official 10:ab9330955226 307 * complete. This function is called as part of the EMAC driver
mbed_official 10:ab9330955226 308 * initialization. Configuration of the PHY at startup is
mbed_official 10:ab9330955226 309 * controlled by setting up configuration defines in lpc_phy.h.
mbed_official 10:ab9330955226 310 *
mbed_official 10:ab9330955226 311 * \param[in] netif NETIF structure
mbed_official 10:ab9330955226 312 * \param[in] rmii If set, configures the PHY for RMII mode
mbed_official 10:ab9330955226 313 * \return ERR_OK if the setup was successful, otherwise ERR_TIMEOUT
mbed_official 10:ab9330955226 314 */
mbed_official 10:ab9330955226 315 err_t lpc_phy_init(struct netif *netif, int rmii)
mbed_official 10:ab9330955226 316 {
WiredHome 28:dd496edab2cc 317 u32_t tmp = 0;
mbed_official 10:ab9330955226 318 s32_t i;
mbed_official 10:ab9330955226 319
mbed_official 10:ab9330955226 320 physts.phy_speed_100mbs = olddphysts.phy_speed_100mbs = 0;
mbed_official 10:ab9330955226 321 physts.phy_full_duplex = olddphysts.phy_full_duplex = 0;
mbed_official 10:ab9330955226 322 physts.phy_link_active = olddphysts.phy_link_active = 0;
mbed_official 10:ab9330955226 323 phyustate = 0;
mbed_official 10:ab9330955226 324
mbed_official 10:ab9330955226 325 /* Only first read and write are checked for failure */
mbed_official 10:ab9330955226 326 /* Put the DP83848C in reset mode and wait for completion */
mbed_official 10:ab9330955226 327 if (lpc_mii_write(DP8_BMCR_REG, DP8_RESET) != 0)
mbed_official 10:ab9330955226 328 return ERR_TIMEOUT;
mbed_official 10:ab9330955226 329 i = 400;
mbed_official 10:ab9330955226 330 while (i > 0) {
mbed_official 10:ab9330955226 331 osDelay(1); /* 1 ms */
mbed_official 10:ab9330955226 332 if (lpc_mii_read(DP8_BMCR_REG, &tmp) != 0)
mbed_official 10:ab9330955226 333 return ERR_TIMEOUT;
mbed_official 10:ab9330955226 334
mbed_official 10:ab9330955226 335 if (!(tmp & (DP8_RESET | DP8_POWER_DOWN)))
mbed_official 10:ab9330955226 336 i = -1;
mbed_official 10:ab9330955226 337 else
mbed_official 10:ab9330955226 338 i--;
mbed_official 10:ab9330955226 339 }
mbed_official 10:ab9330955226 340 /* Timeout? */
mbed_official 10:ab9330955226 341 if (i == 0)
mbed_official 10:ab9330955226 342 return ERR_TIMEOUT;
mbed_official 10:ab9330955226 343
mbed_official 10:ab9330955226 344 // read PHY ID
mbed_official 10:ab9330955226 345 lpc_mii_read(DP8_IDR1_REG, &tmp);
mbed_official 10:ab9330955226 346 phy_id = (tmp << 16);
mbed_official 10:ab9330955226 347 lpc_mii_read(DP8_IDR2_REG, &tmp);
mbed_official 10:ab9330955226 348 phy_id |= (tmp & 0XFFF0);
mbed_official 10:ab9330955226 349
mbed_official 10:ab9330955226 350 /* Setup link based on configuration options */
mbed_official 10:ab9330955226 351 #if PHY_USE_AUTONEG==1
mbed_official 10:ab9330955226 352 tmp = DP8_AUTONEG;
mbed_official 10:ab9330955226 353 #else
mbed_official 10:ab9330955226 354 tmp = 0;
mbed_official 10:ab9330955226 355 #endif
mbed_official 10:ab9330955226 356 #if PHY_USE_100MBS==1
mbed_official 10:ab9330955226 357 tmp |= DP8_SPEED_SELECT;
mbed_official 10:ab9330955226 358 #endif
mbed_official 10:ab9330955226 359 #if PHY_USE_FULL_DUPLEX==1
mbed_official 10:ab9330955226 360 tmp |= DP8_DUPLEX_MODE;
mbed_official 10:ab9330955226 361 #endif
mbed_official 10:ab9330955226 362 lpc_mii_write(DP8_BMCR_REG, tmp);
mbed_official 10:ab9330955226 363
mbed_official 10:ab9330955226 364 /* Enable RMII mode for PHY */
mbed_official 10:ab9330955226 365 if (rmii)
mbed_official 10:ab9330955226 366 lpc_mii_write(DP8_PHY_RBR_REG, DP8_RBR_RMII_MODE);
mbed_official 10:ab9330955226 367
mbed_official 10:ab9330955226 368 /* The link is not set active at this point, but will be detected
mbed_official 10:ab9330955226 369 later */
mbed_official 10:ab9330955226 370
mbed_official 10:ab9330955226 371 return ERR_OK;
mbed_official 10:ab9330955226 372 }
mbed_official 10:ab9330955226 373
mbed_official 10:ab9330955226 374 /* Phy status update state machine */
mbed_official 10:ab9330955226 375 s32_t lpc_phy_sts_sm(struct netif *netif)
mbed_official 10:ab9330955226 376 {
mbed_official 10:ab9330955226 377 s32_t changed = 0;
mbed_official 10:ab9330955226 378 u32_t data = 0;
mbed_official 10:ab9330955226 379 u32_t tmp;
mbed_official 10:ab9330955226 380
mbed_official 10:ab9330955226 381 switch (phyustate) {
mbed_official 10:ab9330955226 382 default:
mbed_official 10:ab9330955226 383 case 0:
mbed_official 10:ab9330955226 384 if (phy_id == DP83848C_ID) {
mbed_official 10:ab9330955226 385 lpc_mii_read_noblock(DP8_PHY_STAT_REG);
mbed_official 10:ab9330955226 386 phyustate = 2;
mbed_official 10:ab9330955226 387 }
mbed_official 10:ab9330955226 388 else if (phy_id == LAN8720_ID) {
mbed_official 10:ab9330955226 389 lpc_mii_read_noblock(DP8_PHY_SCSR_REG);
mbed_official 10:ab9330955226 390 phyustate = 1;
mbed_official 10:ab9330955226 391 }
mbed_official 10:ab9330955226 392 break;
mbed_official 10:ab9330955226 393
mbed_official 10:ab9330955226 394 case 1:
mbed_official 10:ab9330955226 395 if (phy_id == LAN8720_ID) {
mbed_official 10:ab9330955226 396 tmp = lpc_mii_read_data();
mbed_official 10:ab9330955226 397 // we get speed and duplex here.
mbed_official 10:ab9330955226 398 phy_lan7420_sts_tmp = (tmp & PHY_SCSR_DUPLEX) ? LNK_STAT_FULLDUPLEX : 0;
mbed_official 10:ab9330955226 399 phy_lan7420_sts_tmp |= (tmp & PHY_SCSR_100MBIT) ? 0 : LNK_STAT_SPEED10MPS;
mbed_official 10:ab9330955226 400
mbed_official 10:ab9330955226 401 //read the status register to get link status
mbed_official 10:ab9330955226 402 lpc_mii_read_noblock(DP8_BMSR_REG);
mbed_official 10:ab9330955226 403 phyustate = 2;
mbed_official 10:ab9330955226 404 }
mbed_official 10:ab9330955226 405 break;
mbed_official 10:ab9330955226 406
mbed_official 10:ab9330955226 407 case 2:
mbed_official 10:ab9330955226 408 /* Wait for read status state */
mbed_official 10:ab9330955226 409 if (!lpc_mii_is_busy()) {
mbed_official 10:ab9330955226 410 /* Update PHY status */
mbed_official 10:ab9330955226 411 tmp = lpc_mii_read_data();
mbed_official 10:ab9330955226 412
mbed_official 10:ab9330955226 413 if (phy_id == DP83848C_ID) {
mbed_official 10:ab9330955226 414 // STS register contains all needed status bits
mbed_official 10:ab9330955226 415 data = (tmp & DP8_VALID_LINK) ? LNK_STAT_VALID : 0;
mbed_official 10:ab9330955226 416 data |= (tmp & DP8_FULLDUPLEX) ? LNK_STAT_FULLDUPLEX : 0;
mbed_official 10:ab9330955226 417 data |= (tmp & DP8_SPEED10MBPS) ? LNK_STAT_SPEED10MPS : 0;
mbed_official 10:ab9330955226 418 }
mbed_official 10:ab9330955226 419 else if (phy_id == LAN8720_ID) {
mbed_official 10:ab9330955226 420 // we only get the link status here.
mbed_official 10:ab9330955226 421 phy_lan7420_sts_tmp |= (tmp & DP8_LINK_STATUS) ? LNK_STAT_VALID : 0;
mbed_official 10:ab9330955226 422 data = phy_lan7420_sts_tmp;
mbed_official 10:ab9330955226 423 }
mbed_official 10:ab9330955226 424
mbed_official 10:ab9330955226 425 changed = lpc_update_phy_sts(netif, data);
mbed_official 10:ab9330955226 426 phyustate = 0;
mbed_official 10:ab9330955226 427 }
mbed_official 10:ab9330955226 428 break;
mbed_official 10:ab9330955226 429 }
mbed_official 10:ab9330955226 430
mbed_official 10:ab9330955226 431 return changed;
mbed_official 10:ab9330955226 432 }
mbed_official 10:ab9330955226 433
mbed_official 10:ab9330955226 434 /**
mbed_official 10:ab9330955226 435 * @}
mbed_official 10:ab9330955226 436 */
mbed_official 10:ab9330955226 437
mbed_official 10:ab9330955226 438 /* --------------------------------- End Of File ------------------------------ */