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/sched.h>
  18 #include <linux/string.h>
  19 #include <linux/errno.h>
  20 #include <linux/unistd.h>
  21 #include <linux/slab.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/init.h>
  24 #include <linux/delay.h>
  25 #include <linux/netdevice.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/skbuff.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/mm.h>
  30 #include <linux/module.h>
  31 #include <linux/mii.h>
  32 #include <linux/ethtool.h>
  33 #include <linux/phy.h>
  34
  35 #include <asm/io.h>
  36 #include <asm/irq.h>
  37 #include <asm/uaccess.h>
  38
  39 #define MII_M1011_IEVENT                0x13
  40 #define MII_M1011_IEVENT_CLEAR          0x0000
  41
  42 #define MII_M1011_IMASK                 0x12
  43 #define MII_M1011_IMASK_INIT            0x6400
  44 #define MII_M1011_IMASK_CLEAR           0x0000
  45
  46 MODULE_DESCRIPTION("Marvell PHY driver");
  47 MODULE_AUTHOR("Andy Fleming");
  48 MODULE_LICENSE("GPL");
  49
  50 static int marvell_ack_interrupt(struct phy_device *phydev)
  51 {
  52         int err;
  53
  54         /* Clear the interrupts by reading the reg */
  55         err = phy_read(phydev, MII_M1011_IEVENT);
  56
  57         if (err < 0)
  58                 return err;
  59
  60         return 0;
  61 }
  62
  63 static int marvell_config_intr(struct phy_device *phydev)
  64 {
  65         int err;
  66
  67         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
  68                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
  69         else
  70                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);
  71
  72         return err;
  73 }
  74
  75 static int marvell_config_aneg(struct phy_device *phydev)
  76 {
  77         int err;
  78
  79         /* The Marvell PHY has an errata which requires
  80          * that certain registers get written in order
  81          * to restart autonegotiation */
  82         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
  83
  84         if (err < 0)
  85                 return err;
  86
  87         err = phy_write(phydev, 0x1d, 0x1f);
  88         if (err < 0)
  89                 return err;
  90
  91         err = phy_write(phydev, 0x1e, 0x200c);
  92         if (err < 0)
  93                 return err;
  94
  95         err = phy_write(phydev, 0x1d, 0x5);
  96         if (err < 0)
  97                 return err;
  98
  99         err = phy_write(phydev, 0x1e, 0);
 100         if (err < 0)
 101                 return err;
 102
 103         err = phy_write(phydev, 0x1e, 0x100);
 104         if (err < 0)
 105                 return err;
 106
 107
 108         err = genphy_config_aneg(phydev);
 109
 110         return err;
 111 }
 112
 113
 114 static struct phy_driver m88e1101_driver = {
 115         .phy_id         = 0x01410c00,
 116         .phy_id_mask    = 0xffffff00,
 117         .name           = "Marvell 88E1101",
 118         .features       = PHY_GBIT_FEATURES,
 119         .flags          = PHY_HAS_INTERRUPT,
 120         .config_aneg    = &marvell_config_aneg,
 121         .read_status    = &genphy_read_status,
 122         .ack_interrupt  = &marvell_ack_interrupt,
 123         .config_intr    = &marvell_config_intr,
 124         .driver         = { .owner = THIS_MODULE,},
 125 };
 126
 127 static int __init marvell_init(void)
 128 {
 129         return phy_driver_register(&m88e1101_driver);
 130 }
 131
 132 static void __exit marvell_exit(void)
 133 {
 134         phy_driver_unregister(&m88e1101_driver);
 135 }
 136
 137 module_init(marvell_init);
 138 module_exit(marvell_exit);