1 /* 2 * drivers/net/phy/marvell.c 3 * 4 * Driver for Marvell PHYs 5 * 6 * Author: Andy Fleming 7 * 8 * Copyright (c) 2004 Freescale Semiconductor, Inc. 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 * 15 */ 16 #include <linux/kernel.h> 17 #include <linux/string.h> 18 #include <linux/errno.h> 19 #include <linux/unistd.h> 20 #include <linux/slab.h> 21 #include <linux/interrupt.h> 22 #include <linux/init.h> 23 #include <linux/delay.h> 24 #include <linux/netdevice.h> 25 #include <linux/etherdevice.h> 26 #include <linux/skbuff.h> 27 #include <linux/spinlock.h> 28 #include <linux/mm.h> 29 #include <linux/module.h> 30 #include <linux/mii.h> 31 #include <linux/ethtool.h> 32 #include <linux/phy.h> 33 34 #include <asm/io.h> 35 #include <asm/irq.h> 36 #include <asm/uaccess.h> 37 38 #define MII_M1011_IEVENT 0x13 39 #define MII_M1011_IEVENT_CLEAR 0x0000 40 41 #define MII_M1011_IMASK 0x12 42 #define MII_M1011_IMASK_INIT 0x6400 43 #define MII_M1011_IMASK_CLEAR 0x0000 44 45 #define MII_M1011_PHY_SCR 0x10 46 #define MII_M1011_PHY_SCR_AUTO_CROSS 0x0060 47 48 #define MII_M1145_PHY_EXT_CR 0x14 49 #define MII_M1145_RGMII_RX_DELAY 0x0080 50 #define MII_M1145_RGMII_TX_DELAY 0x0002 51 52 #define M1145_DEV_FLAGS_RESISTANCE 0x00000001 53 54 #define MII_M1111_PHY_LED_CONTROL 0x18 55 #define MII_M1111_PHY_LED_DIRECT 0x4100 56 #define MII_M1111_PHY_LED_COMBINE 0x411c 57 58 MODULE_DESCRIPTION("Marvell PHY driver"); 59 MODULE_AUTHOR("Andy Fleming"); 60 MODULE_LICENSE("GPL"); 61 62 static int marvell_ack_interrupt(struct phy_device *phydev) 63 { 64 int err; 65 66 /* Clear the interrupts by reading the reg */ 67 err = phy_read(phydev, MII_M1011_IEVENT); 68 69 if (err < 0) 70 return err; 71 72 return 0; 73 } 74 75 static int marvell_config_intr(struct phy_device *phydev) 76 { 77 int err; 78 79 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 80 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT); 81 else 82 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR); 83 84 return err; 85 } 86 87 static int marvell_config_aneg(struct phy_device *phydev) 88 { 89 int err; 90 91 /* The Marvell PHY has an errata which requires 92 * that certain registers get written in order 93 * to restart autonegotiation */ 94 err = phy_write(phydev, MII_BMCR, BMCR_RESET); 95 96 if (err < 0) 97 return err; 98 99 err = phy_write(phydev, 0x1d, 0x1f); 100 if (err < 0) 101 return err; 102 103 err = phy_write(phydev, 0x1e, 0x200c); 104 if (err < 0) 105 return err; 106 107 err = phy_write(phydev, 0x1d, 0x5); 108 if (err < 0) 109 return err; 110 111 err = phy_write(phydev, 0x1e, 0); 112 if (err < 0) 113 return err; 114 115 err = phy_write(phydev, 0x1e, 0x100); 116 if (err < 0) 117 return err; 118 119 err = phy_write(phydev, MII_M1011_PHY_SCR, 120 MII_M1011_PHY_SCR_AUTO_CROSS); 121 if (err < 0) 122 return err; 123 124 err = phy_write(phydev, MII_M1111_PHY_LED_CONTROL, 125 MII_M1111_PHY_LED_DIRECT); 126 if (err < 0) 127 return err; 128 129 err = genphy_config_aneg(phydev); 130 131 return err; 132 } 133 134 static int m88e1145_config_init(struct phy_device *phydev) 135 { 136 int err; 137 138 /* Take care of errata E0 & E1 */ 139 err = phy_write(phydev, 0x1d, 0x001b); 140 if (err < 0) 141 return err; 142 143 err = phy_write(phydev, 0x1e, 0x418f); 144 if (err < 0) 145 return err; 146 147 err = phy_write(phydev, 0x1d, 0x0016); 148 if (err < 0) 149 return err; 150 151 err = phy_write(phydev, 0x1e, 0xa2da); 152 if (err < 0) 153 return err; 154 155 if (phydev->interface == PHY_INTERFACE_MODE_RGMII) { 156 int temp = phy_read(phydev, MII_M1145_PHY_EXT_CR); 157 if (temp < 0) 158 return temp; 159 160 temp |= (MII_M1145_RGMII_RX_DELAY | MII_M1145_RGMII_TX_DELAY); 161 162 err = phy_write(phydev, MII_M1145_PHY_EXT_CR, temp); 163 if (err < 0) 164 return err; 165 166 if (phydev->dev_flags & M1145_DEV_FLAGS_RESISTANCE) { 167 err = phy_write(phydev, 0x1d, 0x0012); 168 if (err < 0) 169 return err; 170 171 temp = phy_read(phydev, 0x1e); 172 if (temp < 0) 173 return temp; 174 175 temp &= 0xf03f; 176 temp |= 2 << 9; /* 36 ohm */ 177 temp |= 2 << 6; /* 39 ohm */ 178 179 err = phy_write(phydev, 0x1e, temp); 180 if (err < 0) 181 return err; 182 183 err = phy_write(phydev, 0x1d, 0x3); 184 if (err < 0) 185 return err; 186 187 err = phy_write(phydev, 0x1e, 0x8000); 188 if (err < 0) 189 return err; 190 } 191 } 192 193 return 0; 194 } 195 196 static struct phy_driver m88e1101_driver = { 197 .phy_id = 0x01410c60, 198 .phy_id_mask = 0xfffffff0, 199 .name = "Marvell 88E1101", 200 .features = PHY_GBIT_FEATURES, 201 .flags = PHY_HAS_INTERRUPT, 202 .config_aneg = &marvell_config_aneg, 203 .read_status = &genphy_read_status, 204 .ack_interrupt = &marvell_ack_interrupt, 205 .config_intr = &marvell_config_intr, 206 .driver = {.owner = THIS_MODULE,}, 207 }; 208 209 static struct phy_driver m88e1111s_driver = { 210 .phy_id = 0x01410cc0, 211 .phy_id_mask = 0xfffffff0, 212 .name = "Marvell 88E1111", 213 .features = PHY_GBIT_FEATURES, 214 .flags = PHY_HAS_INTERRUPT, 215 .config_aneg = &marvell_config_aneg, 216 .read_status = &genphy_read_status, 217 .ack_interrupt = &marvell_ack_interrupt, 218 .config_intr = &marvell_config_intr, 219 .driver = {.owner = THIS_MODULE,}, 220 }; 221 222 static struct phy_driver m88e1145_driver = { 223 .phy_id = 0x01410cd0, 224 .phy_id_mask = 0xfffffff0, 225 .name = "Marvell 88E1145", 226 .features = PHY_GBIT_FEATURES, 227 .flags = PHY_HAS_INTERRUPT, 228 .config_init = &m88e1145_config_init, 229 .config_aneg = &marvell_config_aneg, 230 .read_status = &genphy_read_status, 231 .ack_interrupt = &marvell_ack_interrupt, 232 .config_intr = &marvell_config_intr, 233 .driver = {.owner = THIS_MODULE,}, 234 }; 235 236 static int __init marvell_init(void) 237 { 238 int ret; 239 240 ret = phy_driver_register(&m88e1101_driver); 241 if (ret) 242 return ret; 243 244 ret = phy_driver_register(&m88e1111s_driver); 245 if (ret) 246 goto err1111s; 247 248 ret = phy_driver_register(&m88e1145_driver); 249 if (ret) 250 goto err1145; 251 252 return 0; 253 254 err1145: 255 phy_driver_unregister(&m88e1111s_driver); 256 err1111s: 257 phy_driver_unregister(&m88e1101_driver); 258 return ret; 259 } 260 261 static void __exit marvell_exit(void) 262 { 263 phy_driver_unregister(&m88e1101_driver); 264 phy_driver_unregister(&m88e1111s_driver); 265 phy_driver_unregister(&m88e1145_driver); 266 } 267 268 module_init(marvell_init); 269 module_exit(marvell_exit); 270