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