drivers/net/phy/cicada.c

   1 /*
   2  * drivers/net/phy/cicada.c
   3  *
   4  * Driver for Cicada 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/sched.h>
  18 #include <linux/string.h>
  19 #include <linux/errno.h>
  20 #include <linux/unistd.h>
  21 #include <linux/slab.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/init.h>
  24 #include <linux/delay.h>
  25 #include <linux/netdevice.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/skbuff.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/mm.h>
  30 #include <linux/module.h>
  31 #include <linux/mii.h>
  32 #include <linux/ethtool.h>
  33 #include <linux/phy.h>
  34
  35 #include <asm/io.h>
  36 #include <asm/irq.h>
  37 #include <asm/uaccess.h>
  38
  39 /* Cicada Extended Control Register 1 */
  40 #define MII_CIS8201_EXT_CON1           0x17
  41 #define MII_CIS8201_EXTCON1_INIT       0x0000
  42
  43 /* Cicada Interrupt Mask Register */
  44 #define MII_CIS8201_IMASK               0x19
  45 #define MII_CIS8201_IMASK_IEN           0x8000
  46 #define MII_CIS8201_IMASK_SPEED 0x4000
  47 #define MII_CIS8201_IMASK_LINK          0x2000
  48 #define MII_CIS8201_IMASK_DUPLEX        0x1000
  49 #define MII_CIS8201_IMASK_MASK          0xf000
  50
  51 /* Cicada Interrupt Status Register */
  52 #define MII_CIS8201_ISTAT               0x1a
  53 #define MII_CIS8201_ISTAT_STATUS        0x8000
  54 #define MII_CIS8201_ISTAT_SPEED 0x4000
  55 #define MII_CIS8201_ISTAT_LINK          0x2000
  56 #define MII_CIS8201_ISTAT_DUPLEX        0x1000
  57
  58 /* Cicada Auxiliary Control/Status Register */
  59 #define MII_CIS8201_AUX_CONSTAT        0x1c
  60 #define MII_CIS8201_AUXCONSTAT_INIT    0x0004
  61 #define MII_CIS8201_AUXCONSTAT_DUPLEX  0x0020
  62 #define MII_CIS8201_AUXCONSTAT_SPEED   0x0018
  63 #define MII_CIS8201_AUXCONSTAT_GBIT    0x0010
  64 #define MII_CIS8201_AUXCONSTAT_100     0x0008
  65
  66 MODULE_DESCRIPTION("Cicadia PHY driver");
  67 MODULE_AUTHOR("Andy Fleming");
  68 MODULE_LICENSE("GPL");
  69
  70 static int cis820x_config_init(struct phy_device *phydev)
  71 {
  72         int err;
  73
  74         err = phy_write(phydev, MII_CIS8201_AUX_CONSTAT,
  75                         MII_CIS8201_AUXCONSTAT_INIT);
  76
  77         if (err < 0)
  78                 return err;
  79
  80         err = phy_write(phydev, MII_CIS8201_EXT_CON1,
  81                         MII_CIS8201_EXTCON1_INIT);
  82
  83         return err;
  84 }
  85
  86 static int cis820x_ack_interrupt(struct phy_device *phydev)
  87 {
  88         int err = phy_read(phydev, MII_CIS8201_ISTAT);
  89
  90         return (err < 0) ? err : 0;
  91 }
  92
  93 static int cis820x_config_intr(struct phy_device *phydev)
  94 {
  95         int err;
  96
  97         if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
  98                 err = phy_write(phydev, MII_CIS8201_IMASK,
  99                                 MII_CIS8201_IMASK_MASK);
 100         else
 101                 err = phy_write(phydev, MII_CIS8201_IMASK, 0);
 102
 103         return err;
 104 }
 105
 106 /* Cicada 820x */
 107 static struct phy_driver cis8204_driver = {
 108         .phy_id         = 0x000fc440,
 109         .name           = "Cicada Cis8204",
 110         .phy_id_mask    = 0x000fffc0,
 111         .features       = PHY_GBIT_FEATURES,
 112         .flags          = PHY_HAS_INTERRUPT,
 113         .config_init    = &cis820x_config_init,
 114         .config_aneg    = &genphy_config_aneg,
 115         .read_status    = &genphy_read_status,
 116         .ack_interrupt  = &cis820x_ack_interrupt,
 117         .config_intr    = &cis820x_config_intr,
 118         .driver         = { .owner = THIS_MODULE,},
 119 };
 120
 121 static int __init cis8204_init(void)
 122 {
 123         return phy_driver_register(&cis8204_driver);
 124 }
 125
 126 static void __exit cis8204_exit(void)
 127 {
 128         phy_driver_unregister(&cis8204_driver);
 129 }
 130
 131 module_init(cis8204_init);
 132 module_exit(cis8204_exit);