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