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