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 /* register definitions for the 973 */
  57 #define MII_LXT973_PCR 16 /* Port Configuration Register */
  58 #define PCR_FIBER_SELECT 1
  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 int lxt973_probe(struct phy_device *phydev)
 126 {
 127         int val = phy_read(phydev, MII_LXT973_PCR);
 128
 129         if (val & PCR_FIBER_SELECT) {
 130                 /*
 131                  * If fiber is selected, then the only correct setting
 132                  * is 100Mbps, full duplex, and auto negotiation off.
 133                  */
 134                 val = phy_read(phydev, MII_BMCR);
 135                 val |= (BMCR_SPEED100 | BMCR_FULLDPLX);
 136                 val &= ~BMCR_ANENABLE;
 137                 phy_write(phydev, MII_BMCR, val);
 138                 /* Remember that the port is in fiber mode. */
 139                 phydev->priv = lxt973_probe;
 140         } else {
 141                 phydev->priv = NULL;
 142         }
 143         return 0;
 144 }
 145
 146 static int lxt973_config_aneg(struct phy_device *phydev)
 147 {
 148         /* Do nothing if port is in fiber mode. */
 149         return phydev->priv ? 0 : genphy_config_aneg(phydev);
 150 }
 151
 152 static struct phy_driver lxt97x_driver[] = {
 153 {
 154         .phy_id         = 0x78100000,
 155         .name           = "LXT970",
 156         .phy_id_mask    = 0xfffffff0,
 157         .features       = PHY_BASIC_FEATURES,
 158         .flags          = PHY_HAS_INTERRUPT,
 159         .config_init    = lxt970_config_init,
 160         .config_aneg    = genphy_config_aneg,
 161         .read_status    = genphy_read_status,
 162         .ack_interrupt  = lxt970_ack_interrupt,
 163         .config_intr    = lxt970_config_intr,
 164         .driver         = { .owner = THIS_MODULE,},
 165 }, {
 166         .phy_id         = 0x001378e0,
 167         .name           = "LXT971",
 168         .phy_id_mask    = 0xfffffff0,
 169         .features       = PHY_BASIC_FEATURES,
 170         .flags          = PHY_HAS_INTERRUPT,
 171         .config_aneg    = genphy_config_aneg,
 172         .read_status    = genphy_read_status,
 173         .ack_interrupt  = lxt971_ack_interrupt,
 174         .config_intr    = lxt971_config_intr,
 175         .driver         = { .owner = THIS_MODULE,},
 176 }, {
 177         .phy_id         = 0x00137a10,
 178         .name           = "LXT973",
 179         .phy_id_mask    = 0xfffffff0,
 180         .features       = PHY_BASIC_FEATURES,
 181         .flags          = 0,
 182         .probe          = lxt973_probe,
 183         .config_aneg    = lxt973_config_aneg,
 184         .read_status    = genphy_read_status,
 185         .driver         = { .owner = THIS_MODULE,},
 186 } };
 187
 188 static int __init lxt_init(void)
 189 {
 190         return phy_drivers_register(lxt97x_driver,
 191                 ARRAY_SIZE(lxt97x_driver));
 192 }
 193
 194 static void __exit lxt_exit(void)
 195 {
 196         phy_drivers_unregister(lxt97x_driver,
 197                 ARRAY_SIZE(lxt97x_driver));
 198 }
 199
 200 module_init(lxt_init);
 201 module_exit(lxt_exit);
 202
 203 static struct mdio_device_id __maybe_unused lxt_tbl[] = {
 204         { 0x78100000, 0xfffffff0 },
 205         { 0x001378e0, 0xfffffff0 },
 206         { 0x00137a10, 0xfffffff0 },
 207         { }
 208 };
 209
 210 MODULE_DEVICE_TABLE(mdio, lxt_tbl);