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/mii.h>
  33 #include <linux/ethtool.h>
  34 #include <linux/phy.h>
  35
  36 #include <asm/io.h>
  37 #include <asm/irq.h>
  38 #include <asm/uaccess.h>
  39
  40 /* The Level one LXT970 is used by many boards                               */
  41
  42 #define MII_LXT970_IER       17  /* Interrupt Enable Register */
  43
  44 #define MII_LXT970_IER_IEN      0x0002
  45
  46 #define MII_LXT970_ISR       18  /* Interrupt Status Register */
  47
  48 #define MII_LXT970_CONFIG    19  /* Configuration Register    */
  49
  50 /* ------------------------------------------------------------------------- */
  51 /* The Level one LXT971 is used on some of my custom boards                  */
  52
  53 /* register definitions for the 971 */
  54 #define MII_LXT971_IER          18  /* Interrupt Enable Register */
  55 #define MII_LXT971_IER_IEN      0x00f2
  56
  57 #define MII_LXT971_ISR          19  /* Interrupt Status Register */
  58
  59
  60 MODULE_DESCRIPTION("Intel LXT PHY driver");
  61 MODULE_AUTHOR("Andy Fleming");
  62 MODULE_LICENSE("GPL");
  63
  64 static int lxt970_ack_interrupt(struct phy_device *phydev)
  65 {
  66         int err;
  67
  68         err = phy_read(phydev, MII_BMSR);
  69
  70         if (err < 0)
  71                 return err;
  72
  73         err = phy_read(phydev, MII_LXT970_ISR);
  74
  75         if (err < 0)
  76                 return err;
  77
  78         return 0;
  79 }
  80
  81 static int lxt970_config_intr(struct phy_device *phydev)
  82 {
  83         int err;
  84
  85         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
  86                 err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
  87         else
  88                 err = phy_write(phydev, MII_LXT970_IER, 0);
  89
  90         return err;
  91 }
  92
  93 static int lxt970_config_init(struct phy_device *phydev)
  94 {
  95         int err;
  96
  97         err = phy_write(phydev, MII_LXT970_CONFIG, 0);
  98
  99         return err;
 100 }
 101
 102
 103 static int lxt971_ack_interrupt(struct phy_device *phydev)
 104 {
 105         int err = phy_read(phydev, MII_LXT971_ISR);
 106
 107         if (err < 0)
 108                 return err;
 109
 110         return 0;
 111 }
 112
 113 static int lxt971_config_intr(struct phy_device *phydev)
 114 {
 115         int err;
 116
 117         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
 118                 err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
 119         else
 120                 err = phy_write(phydev, MII_LXT971_IER, 0);
 121
 122         return err;
 123 }
 124
 125 static struct phy_driver lxt970_driver = {
 126         .phy_id         = 0x07810000,
 127         .name           = "LXT970",
 128         .phy_id_mask    = 0x0fffffff,
 129         .features       = PHY_BASIC_FEATURES,
 130         .flags          = PHY_HAS_INTERRUPT,
 131         .config_init    = lxt970_config_init,
 132         .config_aneg    = genphy_config_aneg,
 133         .read_status    = genphy_read_status,
 134         .ack_interrupt  = lxt970_ack_interrupt,
 135         .config_intr    = lxt970_config_intr,
 136         .driver         = { .owner = THIS_MODULE,},
 137 };
 138
 139 static struct phy_driver lxt971_driver = {
 140         .phy_id         = 0x0001378e,
 141         .name           = "LXT971",
 142         .phy_id_mask    = 0x0fffffff,
 143         .features       = PHY_BASIC_FEATURES,
 144         .flags          = PHY_HAS_INTERRUPT,
 145         .config_aneg    = genphy_config_aneg,
 146         .read_status    = genphy_read_status,
 147         .ack_interrupt  = lxt971_ack_interrupt,
 148         .config_intr    = lxt971_config_intr,
 149         .driver         = { .owner = THIS_MODULE,},
 150 };
 151
 152 static int __init lxt_init(void)
 153 {
 154         int ret;
 155
 156         ret = phy_driver_register(&lxt970_driver);
 157         if (ret)
 158                 goto err1;
 159
 160         ret = phy_driver_register(&lxt971_driver);
 161         if (ret)
 162                 goto err2;
 163         return 0;
 164
 165  err2:
 166         phy_driver_unregister(&lxt970_driver);
 167  err1:
 168         return ret;
 169 }
 170
 171 static void __exit lxt_exit(void)
 172 {
 173         phy_driver_unregister(&lxt970_driver);
 174         phy_driver_unregister(&lxt971_driver);
 175 }
 176
 177 module_init(lxt_init);
 178 module_exit(lxt_exit);