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/string.h>
  18 #include <linux/errno.h>
  19 #include <linux/unistd.h>
  20 #include <linux/slab.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/mm.h>
  29 #include <linux/module.h>
  30 #include <linux/mii.h>
  31 #include <linux/ethtool.h>
  32 #include <linux/phy.h>
  33
  34 #include <asm/io.h>
  35 #include <asm/irq.h>
  36 #include <asm/uaccess.h>
  37
  38 /* The Level one LXT970 is used by many boards                               */
  39
  40 #define MII_LXT970_IER       17  /* Interrupt Enable Register */
  41
  42 #define MII_LXT970_IER_IEN      0x0002
  43
  44 #define MII_LXT970_ISR       18  /* Interrupt Status Register */
  45
  46 #define MII_LXT970_CONFIG    19  /* Configuration Register    */
  47
  48 /* ------------------------------------------------------------------------- */
  49 /* The Level one LXT971 is used on some of my custom boards                  */
  50
  51 /* register definitions for the 971 */
  52 #define MII_LXT971_IER          18  /* Interrupt Enable Register */
  53 #define MII_LXT971_IER_IEN      0x00f2
  54
  55 #define MII_LXT971_ISR          19  /* Interrupt Status Register */
  56
  57
  58 MODULE_DESCRIPTION("Intel LXT PHY driver");
  59 MODULE_AUTHOR("Andy Fleming");
  60 MODULE_LICENSE("GPL");
  61
  62 static int lxt970_ack_interrupt(struct phy_device *phydev)
  63 {
  64         int err;
  65
  66         err = phy_read(phydev, MII_BMSR);
  67
  68         if (err < 0)
  69                 return err;
  70
  71         err = phy_read(phydev, MII_LXT970_ISR);
  72
  73         if (err < 0)
  74                 return err;
  75
  76         return 0;
  77 }
  78
  79 static int lxt970_config_intr(struct phy_device *phydev)
  80 {
  81         int err;
  82
  83         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
  84                 err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
  85         else
  86                 err = phy_write(phydev, MII_LXT970_IER, 0);
  87
  88         return err;
  89 }
  90
  91 static int lxt970_config_init(struct phy_device *phydev)
  92 {
  93         int err;
  94
  95         err = phy_write(phydev, MII_LXT970_CONFIG, 0);
  96
  97         return err;
  98 }
  99
 100
 101 static int lxt971_ack_interrupt(struct phy_device *phydev)
 102 {
 103         int err = phy_read(phydev, MII_LXT971_ISR);
 104
 105         if (err < 0)
 106                 return err;
 107
 108         return 0;
 109 }
 110
 111 static int lxt971_config_intr(struct phy_device *phydev)
 112 {
 113         int err;
 114
 115         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
 116                 err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
 117         else
 118                 err = phy_write(phydev, MII_LXT971_IER, 0);
 119
 120         return err;
 121 }
 122
 123 static struct phy_driver lxt970_driver = {
 124         .phy_id         = 0x78100000,
 125         .name           = "LXT970",
 126         .phy_id_mask    = 0xfffffff0,
 127         .features       = PHY_BASIC_FEATURES,
 128         .flags          = PHY_HAS_INTERRUPT,
 129         .config_init    = lxt970_config_init,
 130         .config_aneg    = genphy_config_aneg,
 131         .read_status    = genphy_read_status,
 132         .ack_interrupt  = lxt970_ack_interrupt,
 133         .config_intr    = lxt970_config_intr,
 134         .driver         = { .owner = THIS_MODULE,},
 135 };
 136
 137 static struct phy_driver lxt971_driver = {
 138         .phy_id         = 0x001378e0,
 139         .name           = "LXT971",
 140         .phy_id_mask    = 0xfffffff0,
 141         .features       = PHY_BASIC_FEATURES,
 142         .flags          = PHY_HAS_INTERRUPT,
 143         .config_aneg    = genphy_config_aneg,
 144         .read_status    = genphy_read_status,
 145         .ack_interrupt  = lxt971_ack_interrupt,
 146         .config_intr    = lxt971_config_intr,
 147         .driver         = { .owner = THIS_MODULE,},
 148 };
 149
 150 static int __init lxt_init(void)
 151 {
 152         int ret;
 153
 154         ret = phy_driver_register(&lxt970_driver);
 155         if (ret)
 156                 goto err1;
 157
 158         ret = phy_driver_register(&lxt971_driver);
 159         if (ret)
 160                 goto err2;
 161         return 0;
 162
 163  err2:
 164         phy_driver_unregister(&lxt970_driver);
 165  err1:
 166         return ret;
 167 }
 168
 169 static void __exit lxt_exit(void)
 170 {
 171         phy_driver_unregister(&lxt970_driver);
 172         phy_driver_unregister(&lxt971_driver);
 173 }
 174
 175 module_init(lxt_init);
 176 module_exit(lxt_exit);