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   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 #define MII_M1111_HWCFG_MODE_SGMII_NO_CLK       0x4
  64
  65 MODULE_DESCRIPTION("Marvell PHY driver");
  66 MODULE_AUTHOR("Andy Fleming");
  67 MODULE_LICENSE("GPL");
  68
  69 static int marvell_ack_interrupt(struct phy_device *phydev)
  70 {
  71         int err;
  72
  73         /* Clear the interrupts by reading the reg */
  74         err = phy_read(phydev, MII_M1011_IEVENT);
  75
  76         if (err < 0)
  77                 return err;
  78
  79         return 0;
  80 }
  81
  82 static int marvell_config_intr(struct phy_device *phydev)
  83 {
  84         int err;
  85
  86         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  87                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
  88         else
  89                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);
  90
  91         return err;
  92 }
  93
  94 static int marvell_config_aneg(struct phy_device *phydev)
  95 {
  96         int err;
  97
  98         /* The Marvell PHY has an errata which requires
  99          * that certain registers get written in order
 100          * to restart autonegotiation */
 101         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 102
 103         if (err < 0)
 104                 return err;
 105
 106         err = phy_write(phydev, 0x1d, 0x1f);
 107         if (err < 0)
 108                 return err;
 109
 110         err = phy_write(phydev, 0x1e, 0x200c);
 111         if (err < 0)
 112                 return err;
 113
 114         err = phy_write(phydev, 0x1d, 0x5);
 115         if (err < 0)
 116                 return err;
 117
 118         err = phy_write(phydev, 0x1e, 0);
 119         if (err < 0)
 120                 return err;
 121
 122         err = phy_write(phydev, 0x1e, 0x100);
 123         if (err < 0)
 124                 return err;
 125
 126         err = phy_write(phydev, MII_M1011_PHY_SCR,
 127                         MII_M1011_PHY_SCR_AUTO_CROSS);
 128         if (err < 0)
 129                 return err;
 130
 131         err = phy_write(phydev, MII_M1111_PHY_LED_CONTROL,
 132                         MII_M1111_PHY_LED_DIRECT);
 133         if (err < 0)
 134                 return err;
 135
 136         err = genphy_config_aneg(phydev);
 137
 138         return err;
 139 }
 140
 141 static int m88e1111_config_init(struct phy_device *phydev)
 142 {
 143         int err;
 144
 145         if ((phydev->interface == PHY_INTERFACE_MODE_RGMII) ||
 146             (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) ||
 147             (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) ||
 148             (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)) {
 149                 int temp;
 150
 151                 temp = phy_read(phydev, MII_M1111_PHY_EXT_CR);
 152                 if (temp < 0)
 153                         return temp;
 154
 155                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 156                         temp |= (MII_M1111_RX_DELAY | MII_M1111_TX_DELAY);
 157                 } else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
 158                         temp &= ~MII_M1111_TX_DELAY;
 159                         temp |= MII_M1111_RX_DELAY;
 160                 } else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
 161                         temp &= ~MII_M1111_RX_DELAY;
 162                         temp |= MII_M1111_TX_DELAY;
 163                 }
 164
 165                 err = phy_write(phydev, MII_M1111_PHY_EXT_CR, temp);
 166                 if (err < 0)
 167                         return err;
 168
 169                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 170                 if (temp < 0)
 171                         return temp;
 172
 173                 temp &= ~(MII_M1111_HWCFG_MODE_MASK);
 174                 temp |= MII_M1111_HWCFG_MODE_RGMII;
 175
 176                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 177                 if (err < 0)
 178                         return err;
 179         }
 180
 181         if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
 182                 int temp;
 183
 184                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 185                 if (temp < 0)
 186                         return temp;
 187
 188                 temp &= ~(MII_M1111_HWCFG_MODE_MASK);
 189                 temp |= MII_M1111_HWCFG_MODE_SGMII_NO_CLK;
 190
 191                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 192                 if (err < 0)
 193                         return err;
 194         }
 195
 196         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 197         if (err < 0)
 198                 return err;
 199
 200         return 0;
 201 }
 202
 203 static int m88e1145_config_init(struct phy_device *phydev)
 204 {
 205         int err;
 206
 207         /* Take care of errata E0 & E1 */
 208         err = phy_write(phydev, 0x1d, 0x001b);
 209         if (err < 0)
 210                 return err;
 211
 212         err = phy_write(phydev, 0x1e, 0x418f);
 213         if (err < 0)
 214                 return err;
 215
 216         err = phy_write(phydev, 0x1d, 0x0016);
 217         if (err < 0)
 218                 return err;
 219
 220         err = phy_write(phydev, 0x1e, 0xa2da);
 221         if (err < 0)
 222                 return err;
 223
 224         if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 225                 int temp = phy_read(phydev, MII_M1145_PHY_EXT_CR);
 226                 if (temp < 0)
 227                         return temp;
 228
 229                 temp |= (MII_M1145_RGMII_RX_DELAY | MII_M1145_RGMII_TX_DELAY);
 230
 231                 err = phy_write(phydev, MII_M1145_PHY_EXT_CR, temp);
 232                 if (err < 0)
 233                         return err;
 234
 235                 if (phydev->dev_flags & M1145_DEV_FLAGS_RESISTANCE) {
 236                         err = phy_write(phydev, 0x1d, 0x0012);
 237                         if (err < 0)
 238                                 return err;
 239
 240                         temp = phy_read(phydev, 0x1e);
 241                         if (temp < 0)
 242                                 return temp;
 243
 244                         temp &= 0xf03f;
 245                         temp |= 2 << 9; /* 36 ohm */
 246                         temp |= 2 << 6; /* 39 ohm */
 247
 248                         err = phy_write(phydev, 0x1e, temp);
 249                         if (err < 0)
 250                                 return err;
 251
 252                         err = phy_write(phydev, 0x1d, 0x3);
 253                         if (err < 0)
 254                                 return err;
 255
 256                         err = phy_write(phydev, 0x1e, 0x8000);
 257                         if (err < 0)
 258                                 return err;
 259                 }
 260         }
 261
 262         return 0;
 263 }
 264
 265 static struct phy_driver marvell_drivers[] = {
 266         {
 267                 .phy_id = 0x01410c60,
 268                 .phy_id_mask = 0xfffffff0,
 269                 .name = "Marvell 88E1101",
 270                 .features = PHY_GBIT_FEATURES,
 271                 .flags = PHY_HAS_INTERRUPT,
 272                 .config_aneg = &marvell_config_aneg,
 273                 .read_status = &genphy_read_status,
 274                 .ack_interrupt = &marvell_ack_interrupt,
 275                 .config_intr = &marvell_config_intr,
 276                 .driver = { .owner = THIS_MODULE },
 277         },
 278         {
 279                 .phy_id = 0x01410c90,
 280                 .phy_id_mask = 0xfffffff0,
 281                 .name = "Marvell 88E1112",
 282                 .features = PHY_GBIT_FEATURES,
 283                 .flags = PHY_HAS_INTERRUPT,
 284                 .config_init = &m88e1111_config_init,
 285                 .config_aneg = &marvell_config_aneg,
 286                 .read_status = &genphy_read_status,
 287                 .ack_interrupt = &marvell_ack_interrupt,
 288                 .config_intr = &marvell_config_intr,
 289                 .driver = { .owner = THIS_MODULE },
 290         },
 291         {
 292                 .phy_id = 0x01410cc0,
 293                 .phy_id_mask = 0xfffffff0,
 294                 .name = "Marvell 88E1111",
 295                 .features = PHY_GBIT_FEATURES,
 296                 .flags = PHY_HAS_INTERRUPT,
 297                 .config_init = &m88e1111_config_init,
 298                 .config_aneg = &marvell_config_aneg,
 299                 .read_status = &genphy_read_status,
 300                 .ack_interrupt = &marvell_ack_interrupt,
 301                 .config_intr = &marvell_config_intr,
 302                 .driver = { .owner = THIS_MODULE },
 303         },
 304         {
 305                 .phy_id = 0x01410cd0,
 306                 .phy_id_mask = 0xfffffff0,
 307                 .name = "Marvell 88E1145",
 308                 .features = PHY_GBIT_FEATURES,
 309                 .flags = PHY_HAS_INTERRUPT,
 310                 .config_init = &m88e1145_config_init,
 311                 .config_aneg = &marvell_config_aneg,
 312                 .read_status = &genphy_read_status,
 313                 .ack_interrupt = &marvell_ack_interrupt,
 314                 .config_intr = &marvell_config_intr,
 315                 .driver = { .owner = THIS_MODULE },
 316         },
 317         {
 318                 .phy_id = 0x01410e30,
 319                 .phy_id_mask = 0xfffffff0,
 320                 .name = "Marvell 88E1240",
 321                 .features = PHY_GBIT_FEATURES,
 322                 .flags = PHY_HAS_INTERRUPT,
 323                 .config_init = &m88e1111_config_init,
 324                 .config_aneg = &marvell_config_aneg,
 325                 .read_status = &genphy_read_status,
 326                 .ack_interrupt = &marvell_ack_interrupt,
 327                 .config_intr = &marvell_config_intr,
 328                 .driver = { .owner = THIS_MODULE },
 329         },
 330 };
 331
 332 static int __init marvell_init(void)
 333 {
 334         int ret;
 335         int i;
 336
 337         for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++) {
 338                 ret = phy_driver_register(&marvell_drivers[i]);
 339
 340                 if (ret) {
 341                         while (i-- > 0)
 342                                 phy_driver_unregister(&marvell_drivers[i]);
 343                         return ret;
 344                 }
 345         }
 346
 347         return 0;
 348 }
 349
 350 static void __exit marvell_exit(void)
 351 {
 352         int i;
 353
 354         for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++)
 355                 phy_driver_unregister(&marvell_drivers[i]);
 356 }
 357
 358 module_init(marvell_init);
 359 module_exit(marvell_exit);