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/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 /* The Level one LXT970 is used by many boards                               */
  40
  41 #define MII_LXT970_IER       17  /* Interrupt Enable Register */
  42
  43 #define MII_LXT970_IER_IEN      0x0002
  44
  45 #define MII_LXT970_ISR       18  /* Interrupt Status Register */
  46
  47 #define MII_LXT970_CONFIG    19  /* Configuration Register    */
  48
  49 /* ------------------------------------------------------------------------- */
  50 /* The Level one LXT971 is used on some of my custom boards                  */
  51
  52 /* register definitions for the 971 */
  53 #define MII_LXT971_IER          18  /* Interrupt Enable Register */
  54 #define MII_LXT971_IER_IEN      0x00f2
  55
  56 #define MII_LXT971_ISR          19  /* Interrupt Status Register */
  57
  58
  59 MODULE_DESCRIPTION("Intel LXT PHY driver");
  60 MODULE_AUTHOR("Andy Fleming");
  61 MODULE_LICENSE("GPL");
  62
  63 static int lxt970_ack_interrupt(struct phy_device *phydev)
  64 {
  65         int err;
  66
  67         err = phy_read(phydev, MII_BMSR);
  68
  69         if (err < 0)
  70                 return err;
  71
  72         err = phy_read(phydev, MII_LXT970_ISR);
  73
  74         if (err < 0)
  75                 return err;
  76
  77         return 0;
  78 }
  79
  80 static int lxt970_config_intr(struct phy_device *phydev)
  81 {
  82         int err;
  83
  84         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
  85                 err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
  86         else
  87                 err = phy_write(phydev, MII_LXT970_IER, 0);
  88
  89         return err;
  90 }
  91
  92 static int lxt970_config_init(struct phy_device *phydev)
  93 {
  94         int err;
  95
  96         err = phy_write(phydev, MII_LXT970_CONFIG, 0);
  97
  98         return err;
  99 }
 100
 101
 102 static int lxt971_ack_interrupt(struct phy_device *phydev)
 103 {
 104         int err = phy_read(phydev, MII_LXT971_ISR);
 105
 106         if (err < 0)
 107                 return err;
 108
 109         return 0;
 110 }
 111
 112 static int lxt971_config_intr(struct phy_device *phydev)
 113 {
 114         int err;
 115
 116         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
 117                 err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
 118         else
 119                 err = phy_write(phydev, MII_LXT971_IER, 0);
 120
 121         return err;
 122 }
 123
 124 static struct phy_driver lxt970_driver = {
 125         .phy_id         = 0x78100000,
 126         .name           = "LXT970",
 127         .phy_id_mask    = 0xfffffff0,
 128         .features       = PHY_BASIC_FEATURES,
 129         .flags          = PHY_HAS_INTERRUPT,
 130         .config_init    = lxt970_config_init,
 131         .config_aneg    = genphy_config_aneg,
 132         .read_status    = genphy_read_status,
 133         .ack_interrupt  = lxt970_ack_interrupt,
 134         .config_intr    = lxt970_config_intr,
 135         .driver         = { .owner = THIS_MODULE,},
 136 };
 137
 138 static struct phy_driver lxt971_driver = {
 139         .phy_id         = 0x001378e0,
 140         .name           = "LXT971",
 141         .phy_id_mask    = 0xfffffff0,
 142         .features       = PHY_BASIC_FEATURES,
 143         .flags          = PHY_HAS_INTERRUPT,
 144         .config_aneg    = genphy_config_aneg,
 145         .read_status    = genphy_read_status,
 146         .ack_interrupt  = lxt971_ack_interrupt,
 147         .config_intr    = lxt971_config_intr,
 148         .driver         = { .owner = THIS_MODULE,},
 149 };
 150
 151 static int __init lxt_init(void)
 152 {
 153         int ret;
 154
 155         ret = phy_driver_register(&lxt970_driver);
 156         if (ret)
 157                 goto err1;
 158
 159         ret = phy_driver_register(&lxt971_driver);
 160         if (ret)
 161                 goto err2;
 162         return 0;
 163
 164  err2:
 165         phy_driver_unregister(&lxt970_driver);
 166  err1:
 167         return ret;
 168 }
 169
 170 static void __exit lxt_exit(void)
 171 {
 172         phy_driver_unregister(&lxt970_driver);
 173         phy_driver_unregister(&lxt971_driver);
 174 }
 175
 176 module_init(lxt_init);
 177 module_exit(lxt_exit);