drivers/net/phy/davicom.c

   1 /*
   2  * drivers/net/phy/davicom.c
   3  *
   4  * Driver for Davicom 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 #define MII_DM9161_SCR          0x10
  40 #define MII_DM9161_SCR_INIT     0x0610
  41
  42 /* DM9161 Interrupt Register */
  43 #define MII_DM9161_INTR 0x15
  44 #define MII_DM9161_INTR_PEND            0x8000
  45 #define MII_DM9161_INTR_DPLX_MASK       0x0800
  46 #define MII_DM9161_INTR_SPD_MASK        0x0400
  47 #define MII_DM9161_INTR_LINK_MASK       0x0200
  48 #define MII_DM9161_INTR_MASK            0x0100
  49 #define MII_DM9161_INTR_DPLX_CHANGE     0x0010
  50 #define MII_DM9161_INTR_SPD_CHANGE      0x0008
  51 #define MII_DM9161_INTR_LINK_CHANGE     0x0004
  52 #define MII_DM9161_INTR_INIT            0x0000
  53 #define MII_DM9161_INTR_STOP    \
  54 (MII_DM9161_INTR_DPLX_MASK | MII_DM9161_INTR_SPD_MASK \
  55  | MII_DM9161_INTR_LINK_MASK | MII_DM9161_INTR_MASK)
  56
  57 /* DM9161 10BT Configuration/Status */
  58 #define MII_DM9161_10BTCSR      0x12
  59 #define MII_DM9161_10BTCSR_INIT 0x7800
  60
  61 MODULE_DESCRIPTION("Davicom PHY driver");
  62 MODULE_AUTHOR("Andy Fleming");
  63 MODULE_LICENSE("GPL");
  64
  65
  66 #define DM9161_DELAY 1
  67 static int dm9161_config_intr(struct phy_device *phydev)
  68 {
  69         int temp;
  70
  71         temp = phy_read(phydev, MII_DM9161_INTR);
  72
  73         if (temp < 0)
  74                 return temp;
  75
  76         if(PHY_INTERRUPT_ENABLED == phydev->interrupts )
  77                 temp &= ~(MII_DM9161_INTR_STOP);
  78         else
  79                 temp |= MII_DM9161_INTR_STOP;
  80
  81         temp = phy_write(phydev, MII_DM9161_INTR, temp);
  82
  83         return temp;
  84 }
  85
  86 static int dm9161_config_aneg(struct phy_device *phydev)
  87 {
  88         int err;
  89
  90         /* Isolate the PHY */
  91         err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
  92
  93         if (err < 0)
  94                 return err;
  95
  96         /* Configure the new settings */
  97         err = genphy_config_aneg(phydev);
  98
  99         if (err < 0)
 100                 return err;
 101
 102         return 0;
 103 }
 104
 105 static int dm9161_config_init(struct phy_device *phydev)
 106 {
 107         int err;
 108
 109         /* Isolate the PHY */
 110         err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
 111
 112         if (err < 0)
 113                 return err;
 114
 115         /* Do not bypass the scrambler/descrambler */
 116         err = phy_write(phydev, MII_DM9161_SCR, MII_DM9161_SCR_INIT);
 117
 118         if (err < 0)
 119                 return err;
 120
 121         /* Clear 10BTCSR to default */
 122         err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
 123
 124         if (err < 0)
 125                 return err;
 126
 127         /* Reconnect the PHY, and enable Autonegotiation */
 128         err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
 129
 130         if (err < 0)
 131                 return err;
 132
 133         return 0;
 134 }
 135
 136 static int dm9161_ack_interrupt(struct phy_device *phydev)
 137 {
 138         int err = phy_read(phydev, MII_DM9161_INTR);
 139
 140         return (err < 0) ? err : 0;
 141 }
 142
 143 static struct phy_driver dm9161_driver = {
 144         .phy_id         = 0x0181b880,
 145         .name           = "Davicom DM9161E",
 146         .phy_id_mask    = 0x0ffffff0,
 147         .features       = PHY_BASIC_FEATURES,
 148         .config_init    = dm9161_config_init,
 149         .config_aneg    = dm9161_config_aneg,
 150         .read_status    = genphy_read_status,
 151         .driver         = { .owner = THIS_MODULE,},
 152 };
 153
 154 static struct phy_driver dm9131_driver = {
 155         .phy_id         = 0x00181b80,
 156         .name           = "Davicom DM9131",
 157         .phy_id_mask    = 0x0ffffff0,
 158         .features       = PHY_BASIC_FEATURES,
 159         .flags          = PHY_HAS_INTERRUPT,
 160         .config_aneg    = genphy_config_aneg,
 161         .read_status    = genphy_read_status,
 162         .ack_interrupt  = dm9161_ack_interrupt,
 163         .config_intr    = dm9161_config_intr,
 164         .driver         = { .owner = THIS_MODULE,},
 165 };
 166
 167 static int __init davicom_init(void)
 168 {
 169         int ret;
 170
 171         ret = phy_driver_register(&dm9161_driver);
 172         if (ret)
 173                 goto err1;
 174
 175         ret = phy_driver_register(&dm9131_driver);
 176         if (ret)
 177                 goto err2;
 178         return 0;
 179
 180  err2:
 181         phy_driver_unregister(&dm9161_driver);
 182  err1:
 183         return ret;
 184 }
 185
 186 static void __exit davicom_exit(void)
 187 {
 188         phy_driver_unregister(&dm9161_driver);
 189         phy_driver_unregister(&dm9131_driver);
 190 }
 191
 192 module_init(davicom_init);
 193 module_exit(davicom_exit);