drivers/net/phy/marvell.c

   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 #define MII_M1111_PHY_EXT_CR            0x14
  58 #define MII_M1111_RX_DELAY              0x80
  59 #define MII_M1111_TX_DELAY              0x2
  60 #define MII_M1111_PHY_EXT_SR            0x1b
  61 #define MII_M1111_HWCFG_MODE_MASK       0xf
  62 #define MII_M1111_HWCFG_MODE_RGMII      0xb
  63
  64 MODULE_DESCRIPTION("Marvell PHY driver");
  65 MODULE_AUTHOR("Andy Fleming");
  66 MODULE_LICENSE("GPL");
  67
  68 static int marvell_ack_interrupt(struct phy_device *phydev)
  69 {
  70         int err;
  71
  72         /* Clear the interrupts by reading the reg */
  73         err = phy_read(phydev, MII_M1011_IEVENT);
  74
  75         if (err < 0)
  76                 return err;
  77
  78         return 0;
  79 }
  80
  81 static int marvell_config_intr(struct phy_device *phydev)
  82 {
  83         int err;
  84
  85         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  86                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
  87         else
  88                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);
  89
  90         return err;
  91 }
  92
  93 static int marvell_config_aneg(struct phy_device *phydev)
  94 {
  95         int err;
  96
  97         /* The Marvell PHY has an errata which requires
  98          * that certain registers get written in order
  99          * to restart autonegotiation */
 100         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 101
 102         if (err < 0)
 103                 return err;
 104
 105         err = phy_write(phydev, 0x1d, 0x1f);
 106         if (err < 0)
 107                 return err;
 108
 109         err = phy_write(phydev, 0x1e, 0x200c);
 110         if (err < 0)
 111                 return err;
 112
 113         err = phy_write(phydev, 0x1d, 0x5);
 114         if (err < 0)
 115                 return err;
 116
 117         err = phy_write(phydev, 0x1e, 0);
 118         if (err < 0)
 119                 return err;
 120
 121         err = phy_write(phydev, 0x1e, 0x100);
 122         if (err < 0)
 123                 return err;
 124
 125         err = phy_write(phydev, MII_M1011_PHY_SCR,
 126                         MII_M1011_PHY_SCR_AUTO_CROSS);
 127         if (err < 0)
 128                 return err;
 129
 130         err = phy_write(phydev, MII_M1111_PHY_LED_CONTROL,
 131                         MII_M1111_PHY_LED_DIRECT);
 132         if (err < 0)
 133                 return err;
 134
 135         err = genphy_config_aneg(phydev);
 136
 137         return err;
 138 }
 139
 140 static int m88e1111_config_init(struct phy_device *phydev)
 141 {
 142         int err;
 143
 144         if ((phydev->interface == PHY_INTERFACE_MODE_RGMII) ||
 145             (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)) {
 146                 int temp;
 147
 148                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 149                         temp = phy_read(phydev, MII_M1111_PHY_EXT_CR);
 150                         if (temp < 0)
 151                                 return temp;
 152
 153                         temp |= (MII_M1111_RX_DELAY | MII_M1111_TX_DELAY);
 154
 155                         err = phy_write(phydev, MII_M1111_PHY_EXT_CR, temp);
 156                         if (err < 0)
 157                                 return err;
 158                 }
 159
 160                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 161                 if (temp < 0)
 162                         return temp;
 163
 164                 temp &= ~(MII_M1111_HWCFG_MODE_MASK);
 165                 temp |= MII_M1111_HWCFG_MODE_RGMII;
 166
 167                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 168                 if (err < 0)
 169                         return err;
 170         }
 171
 172         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 173         if (err < 0)
 174                 return err;
 175
 176         return 0;
 177 }
 178
 179 static int m88e1145_config_init(struct phy_device *phydev)
 180 {
 181         int err;
 182
 183         /* Take care of errata E0 & E1 */
 184         err = phy_write(phydev, 0x1d, 0x001b);
 185         if (err < 0)
 186                 return err;
 187
 188         err = phy_write(phydev, 0x1e, 0x418f);
 189         if (err < 0)
 190                 return err;
 191
 192         err = phy_write(phydev, 0x1d, 0x0016);
 193         if (err < 0)
 194                 return err;
 195
 196         err = phy_write(phydev, 0x1e, 0xa2da);
 197         if (err < 0)
 198                 return err;
 199
 200         if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 201                 int temp = phy_read(phydev, MII_M1145_PHY_EXT_CR);
 202                 if (temp < 0)
 203                         return temp;
 204
 205                 temp |= (MII_M1145_RGMII_RX_DELAY | MII_M1145_RGMII_TX_DELAY);
 206
 207                 err = phy_write(phydev, MII_M1145_PHY_EXT_CR, temp);
 208                 if (err < 0)
 209                         return err;
 210
 211                 if (phydev->dev_flags & M1145_DEV_FLAGS_RESISTANCE) {
 212                         err = phy_write(phydev, 0x1d, 0x0012);
 213                         if (err < 0)
 214                                 return err;
 215
 216                         temp = phy_read(phydev, 0x1e);
 217                         if (temp < 0)
 218                                 return temp;
 219
 220                         temp &= 0xf03f;
 221                         temp |= 2 << 9; /* 36 ohm */
 222                         temp |= 2 << 6; /* 39 ohm */
 223
 224                         err = phy_write(phydev, 0x1e, temp);
 225                         if (err < 0)
 226                                 return err;
 227
 228                         err = phy_write(phydev, 0x1d, 0x3);
 229                         if (err < 0)
 230                                 return err;
 231
 232                         err = phy_write(phydev, 0x1e, 0x8000);
 233                         if (err < 0)
 234                                 return err;
 235                 }
 236         }
 237
 238         return 0;
 239 }
 240
 241 static struct phy_driver m88e1101_driver = {
 242         .phy_id = 0x01410c60,
 243         .phy_id_mask = 0xfffffff0,
 244         .name = "Marvell 88E1101",
 245         .features = PHY_GBIT_FEATURES,
 246         .flags = PHY_HAS_INTERRUPT,
 247         .config_aneg = &marvell_config_aneg,
 248         .read_status = &genphy_read_status,
 249         .ack_interrupt = &marvell_ack_interrupt,
 250         .config_intr = &marvell_config_intr,
 251         .driver = {.owner = THIS_MODULE,},
 252 };
 253
 254 static struct phy_driver m88e1111_driver = {
 255         .phy_id = 0x01410cc0,
 256         .phy_id_mask = 0xfffffff0,
 257         .name = "Marvell 88E1111",
 258         .features = PHY_GBIT_FEATURES,
 259         .flags = PHY_HAS_INTERRUPT,
 260         .config_aneg = &marvell_config_aneg,
 261         .read_status = &genphy_read_status,
 262         .ack_interrupt = &marvell_ack_interrupt,
 263         .config_intr = &marvell_config_intr,
 264         .config_init = &m88e1111_config_init,
 265         .driver = {.owner = THIS_MODULE,},
 266 };
 267
 268 static struct phy_driver m88e1145_driver = {
 269         .phy_id = 0x01410cd0,
 270         .phy_id_mask = 0xfffffff0,
 271         .name = "Marvell 88E1145",
 272         .features = PHY_GBIT_FEATURES,
 273         .flags = PHY_HAS_INTERRUPT,
 274         .config_init = &m88e1145_config_init,
 275         .config_aneg = &marvell_config_aneg,
 276         .read_status = &genphy_read_status,
 277         .ack_interrupt = &marvell_ack_interrupt,
 278         .config_intr = &marvell_config_intr,
 279         .driver = {.owner = THIS_MODULE,},
 280 };
 281
 282 static int __init marvell_init(void)
 283 {
 284         int ret;
 285
 286         ret = phy_driver_register(&m88e1101_driver);
 287         if (ret)
 288                 return ret;
 289
 290         ret = phy_driver_register(&m88e1111_driver);
 291         if (ret)
 292                 goto err1111;
 293
 294         ret = phy_driver_register(&m88e1145_driver);
 295         if (ret)
 296                 goto err1145;
 297
 298         return 0;
 299
 300 err1145:
 301         phy_driver_unregister(&m88e1111_driver);
 302 err1111:
 303         phy_driver_unregister(&m88e1101_driver);
 304         return ret;
 305 }
 306
 307 static void __exit marvell_exit(void)
 308 {
 309         phy_driver_unregister(&m88e1101_driver);
 310         phy_driver_unregister(&m88e1111_driver);
 311         phy_driver_unregister(&m88e1145_driver);
 312 }
 313
 314 module_init(marvell_init);
 315 module_exit(marvell_exit);