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/interrupt.h>
  21 #include <linux/init.h>
  22 #include <linux/delay.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/mm.h>
  28 #include <linux/module.h>
  29 #include <linux/mii.h>
  30 #include <linux/ethtool.h>
  31 #include <linux/phy.h>
  32
  33 #include <asm/io.h>
  34 #include <asm/irq.h>
  35 #include <asm/uaccess.h>
  36
  37 /* The Level one LXT970 is used by many boards                               */
  38
  39 #define MII_LXT970_IER       17  /* Interrupt Enable Register */
  40
  41 #define MII_LXT970_IER_IEN      0x0002
  42
  43 #define MII_LXT970_ISR       18  /* Interrupt Status Register */
  44
  45 #define MII_LXT970_CONFIG    19  /* Configuration Register    */
  46
  47 /* ------------------------------------------------------------------------- */
  48 /* The Level one LXT971 is used on some of my custom boards                  */
  49
  50 /* register definitions for the 971 */
  51 #define MII_LXT971_IER          18  /* Interrupt Enable Register */
  52 #define MII_LXT971_IER_IEN      0x00f2
  53
  54 #define MII_LXT971_ISR          19  /* Interrupt Status Register */
  55
  56
  57 MODULE_DESCRIPTION("Intel LXT PHY driver");
  58 MODULE_AUTHOR("Andy Fleming");
  59 MODULE_LICENSE("GPL");
  60
  61 static int lxt970_ack_interrupt(struct phy_device *phydev)
  62 {
  63         int err;
  64
  65         err = phy_read(phydev, MII_BMSR);
  66
  67         if (err < 0)
  68                 return err;
  69
  70         err = phy_read(phydev, MII_LXT970_ISR);
  71
  72         if (err < 0)
  73                 return err;
  74
  75         return 0;
  76 }
  77
  78 static int lxt970_config_intr(struct phy_device *phydev)
  79 {
  80         int err;
  81
  82         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
  83                 err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
  84         else
  85                 err = phy_write(phydev, MII_LXT970_IER, 0);
  86
  87         return err;
  88 }
  89
  90 static int lxt970_config_init(struct phy_device *phydev)
  91 {
  92         int err;
  93
  94         err = phy_write(phydev, MII_LXT970_CONFIG, 0);
  95
  96         return err;
  97 }
  98
  99
 100 static int lxt971_ack_interrupt(struct phy_device *phydev)
 101 {
 102         int err = phy_read(phydev, MII_LXT971_ISR);
 103
 104         if (err < 0)
 105                 return err;
 106
 107         return 0;
 108 }
 109
 110 static int lxt971_config_intr(struct phy_device *phydev)
 111 {
 112         int err;
 113
 114         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
 115                 err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
 116         else
 117                 err = phy_write(phydev, MII_LXT971_IER, 0);
 118
 119         return err;
 120 }
 121
 122 static struct phy_driver lxt970_driver = {
 123         .phy_id         = 0x78100000,
 124         .name           = "LXT970",
 125         .phy_id_mask    = 0xfffffff0,
 126         .features       = PHY_BASIC_FEATURES,
 127         .flags          = PHY_HAS_INTERRUPT,
 128         .config_init    = lxt970_config_init,
 129         .config_aneg    = genphy_config_aneg,
 130         .read_status    = genphy_read_status,
 131         .ack_interrupt  = lxt970_ack_interrupt,
 132         .config_intr    = lxt970_config_intr,
 133         .driver         = { .owner = THIS_MODULE,},
 134 };
 135
 136 static struct phy_driver lxt971_driver = {
 137         .phy_id         = 0x001378e0,
 138         .name           = "LXT971",
 139         .phy_id_mask    = 0xfffffff0,
 140         .features       = PHY_BASIC_FEATURES,
 141         .flags          = PHY_HAS_INTERRUPT,
 142         .config_aneg    = genphy_config_aneg,
 143         .read_status    = genphy_read_status,
 144         .ack_interrupt  = lxt971_ack_interrupt,
 145         .config_intr    = lxt971_config_intr,
 146         .driver         = { .owner = THIS_MODULE,},
 147 };
 148
 149 static int __init lxt_init(void)
 150 {
 151         int ret;
 152
 153         ret = phy_driver_register(&lxt970_driver);
 154         if (ret)
 155                 goto err1;
 156
 157         ret = phy_driver_register(&lxt971_driver);
 158         if (ret)
 159                 goto err2;
 160         return 0;
 161
 162  err2:
 163         phy_driver_unregister(&lxt970_driver);
 164  err1:
 165         return ret;
 166 }
 167
 168 static void __exit lxt_exit(void)
 169 {
 170         phy_driver_unregister(&lxt970_driver);
 171         phy_driver_unregister(&lxt971_driver);
 172 }
 173
 174 module_init(lxt_init);
 175 module_exit(lxt_exit);
 176
 177 static struct mdio_device_id lxt_tbl[] = {
 178         { 0x78100000, 0xfffffff0 },
 179         { 0x001378e0, 0xfffffff0 },
 180         { }
 181 };
 182
 183 MODULE_DEVICE_TABLE(mdio, lxt_tbl);