drivers/net/phy/vitesse.c

   1 /*
   2  * Driver for Vitesse PHYs
   3  *
   4  * Author: Kriston Carson
   5  *
   6  * Copyright (c) 2005 Freescale Semiconductor, Inc.
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  *
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/mii.h>
  18 #include <linux/ethtool.h>
  19 #include <linux/phy.h>
  20
  21 /* Vitesse Extended Control Register 1 */
  22 #define MII_VSC8244_EXT_CON1           0x17
  23 #define MII_VSC8244_EXTCON1_INIT       0x0000
  24
  25 /* Vitesse Interrupt Mask Register */
  26 #define MII_VSC8244_IMASK               0x19
  27 #define MII_VSC8244_IMASK_IEN           0x8000
  28 #define MII_VSC8244_IMASK_SPEED         0x4000
  29 #define MII_VSC8244_IMASK_LINK          0x2000
  30 #define MII_VSC8244_IMASK_DUPLEX        0x1000
  31 #define MII_VSC8244_IMASK_MASK          0xf000
  32
  33 /* Vitesse Interrupt Status Register */
  34 #define MII_VSC8244_ISTAT               0x1a
  35 #define MII_VSC8244_ISTAT_STATUS        0x8000
  36 #define MII_VSC8244_ISTAT_SPEED         0x4000
  37 #define MII_VSC8244_ISTAT_LINK          0x2000
  38 #define MII_VSC8244_ISTAT_DUPLEX        0x1000
  39
  40 /* Vitesse Auxiliary Control/Status Register */
  41 #define MII_VSC8244_AUX_CONSTAT         0x1c
  42 #define MII_VSC8244_AUXCONSTAT_INIT     0x0004
  43 #define MII_VSC8244_AUXCONSTAT_DUPLEX   0x0020
  44 #define MII_VSC8244_AUXCONSTAT_SPEED    0x0018
  45 #define MII_VSC8244_AUXCONSTAT_GBIT     0x0010
  46 #define MII_VSC8244_AUXCONSTAT_100      0x0008
  47
  48 MODULE_DESCRIPTION("Vitesse PHY driver");
  49 MODULE_AUTHOR("Kriston Carson");
  50 MODULE_LICENSE("GPL");
  51
  52 static int vsc824x_config_init(struct phy_device *phydev)
  53 {
  54         int err;
  55
  56         err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
  57                         MII_VSC8244_AUXCONSTAT_INIT);
  58         if (err < 0)
  59                 return err;
  60
  61         err = phy_write(phydev, MII_VSC8244_EXT_CON1,
  62                         MII_VSC8244_EXTCON1_INIT);
  63         return err;
  64 }
  65
  66 static int vsc824x_ack_interrupt(struct phy_device *phydev)
  67 {
  68         int err = phy_read(phydev, MII_VSC8244_ISTAT);
  69
  70         return (err < 0) ? err : 0;
  71 }
  72
  73 static int vsc824x_config_intr(struct phy_device *phydev)
  74 {
  75         int err;
  76
  77         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  78                 err = phy_write(phydev, MII_VSC8244_IMASK,
  79                                 MII_VSC8244_IMASK_MASK);
  80         else
  81                 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
  82         return err;
  83 }
  84
  85 /* Vitesse 824x */
  86 static struct phy_driver vsc8244_driver = {
  87         .phy_id         = 0x000fc6c2,
  88         .name           = "Vitesse VSC8244",
  89         .phy_id_mask    = 0x000fffc0,
  90         .features       = PHY_GBIT_FEATURES,
  91         .flags          = PHY_HAS_INTERRUPT,
  92         .config_init    = &vsc824x_config_init,
  93         .config_aneg    = &genphy_config_aneg,
  94         .read_status    = &genphy_read_status,
  95         .ack_interrupt  = &vsc824x_ack_interrupt,
  96         .config_intr    = &vsc824x_config_intr,
  97         .driver         = { .owner = THIS_MODULE,},
  98 };
  99
 100 static int __init vsc8244_init(void)
 101 {
 102         return phy_driver_register(&vsc8244_driver);
 103 }
 104
 105 static void __exit vsc8244_exit(void)
 106 {
 107         phy_driver_unregister(&vsc8244_driver);
 108 }
 109
 110 module_init(vsc8244_init);
 111 module_exit(vsc8244_exit);