drivers/net/phy/lxt.c

   1 /*
   2  * drivers/net/phy/lxt.c
   3  *
   4  * Driver for Intel LXT 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 /* The Level one LXT970 is used by many boards                               */
  42
  43 #define MII_LXT970_IER       17  /* Interrupt Enable Register */
  44
  45 #define MII_LXT970_IER_IEN      0x0002
  46
  47 #define MII_LXT970_ISR       18  /* Interrupt Status Register */
  48
  49 #define MII_LXT970_CONFIG    19  /* Configuration Register    */
  50
  51 /* ------------------------------------------------------------------------- */
  52 /* The Level one LXT971 is used on some of my custom boards                  */
  53
  54 /* register definitions for the 971 */
  55 #define MII_LXT971_IER          18  /* Interrupt Enable Register */
  56 #define MII_LXT971_IER_IEN      0x00f2
  57
  58 #define MII_LXT971_ISR          19  /* Interrupt Status Register */
  59
  60
  61 MODULE_DESCRIPTION("Intel LXT PHY driver");
  62 MODULE_AUTHOR("Andy Fleming");
  63 MODULE_LICENSE("GPL");
  64
  65 static int lxt970_ack_interrupt(struct phy_device *phydev)
  66 {
  67         int err;
  68
  69         err = phy_read(phydev, MII_BMSR);
  70
  71         if (err < 0)
  72                 return err;
  73
  74         err = phy_read(phydev, MII_LXT970_ISR);
  75
  76         if (err < 0)
  77                 return err;
  78
  79         return 0;
  80 }
  81
  82 static int lxt970_config_intr(struct phy_device *phydev)
  83 {
  84         int err;
  85
  86         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
  87                 err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
  88         else
  89                 err = phy_write(phydev, MII_LXT970_IER, 0);
  90
  91         return err;
  92 }
  93
  94 static int lxt970_config_init(struct phy_device *phydev)
  95 {
  96         int err;
  97
  98         err = phy_write(phydev, MII_LXT970_CONFIG, 0);
  99
 100         return err;
 101 }
 102
 103
 104 static int lxt971_ack_interrupt(struct phy_device *phydev)
 105 {
 106         int err = phy_read(phydev, MII_LXT971_ISR);
 107
 108         if (err < 0)
 109                 return err;
 110
 111         return 0;
 112 }
 113
 114 static int lxt971_config_intr(struct phy_device *phydev)
 115 {
 116         int err;
 117
 118         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
 119                 err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
 120         else
 121                 err = phy_write(phydev, MII_LXT971_IER, 0);
 122
 123         return err;
 124 }
 125
 126 static struct phy_driver lxt970_driver = {
 127         .phy_id         = 0x07810000,
 128         .name           = "LXT970",
 129         .phy_id_mask    = 0x0fffffff,
 130         .features       = PHY_BASIC_FEATURES,
 131         .flags          = PHY_HAS_INTERRUPT,
 132         .config_init    = lxt970_config_init,
 133         .config_aneg    = genphy_config_aneg,
 134         .read_status    = genphy_read_status,
 135         .ack_interrupt  = lxt970_ack_interrupt,
 136         .config_intr    = lxt970_config_intr,
 137         .driver         = { .owner = THIS_MODULE,},
 138 };
 139
 140 static struct phy_driver lxt971_driver = {
 141         .phy_id         = 0x0001378e,
 142         .name           = "LXT971",
 143         .phy_id_mask    = 0x0fffffff,
 144         .features       = PHY_BASIC_FEATURES,
 145         .flags          = PHY_HAS_INTERRUPT,
 146         .config_aneg    = genphy_config_aneg,
 147         .read_status    = genphy_read_status,
 148         .ack_interrupt  = lxt971_ack_interrupt,
 149         .config_intr    = lxt971_config_intr,
 150         .driver         = { .owner = THIS_MODULE,},
 151 };
 152
 153 static int __init lxt_init(void)
 154 {
 155         int ret;
 156
 157         ret = phy_driver_register(&lxt970_driver);
 158         if (ret)
 159                 goto err1;
 160
 161         ret = phy_driver_register(&lxt971_driver);
 162         if (ret)
 163                 goto err2;
 164         return 0;
 165
 166  err2:
 167         phy_driver_unregister(&lxt970_driver);
 168  err1:
 169         return ret;
 170 }
 171
 172 static void __exit lxt_exit(void)
 173 {
 174         phy_driver_unregister(&lxt970_driver);
 175         phy_driver_unregister(&lxt971_driver);
 176 }
 177
 178 module_init(lxt_init);
 179 module_exit(lxt_exit);