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/string.h>
  18 #include <linux/errno.h>
  19 #include <linux/unistd.h>
  20 #include <linux/slab.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/mm.h>
  29 #include <linux/module.h>
  30 #include <linux/mii.h>
  31 #include <linux/ethtool.h>
  32 #include <linux/phy.h>
  33
  34 #include <asm/io.h>
  35 #include <asm/irq.h>
  36 #include <asm/uaccess.h>
  37
  38 #define MII_DM9161_SCR          0x10
  39 #define MII_DM9161_SCR_INIT     0x0610
  40
  41 /* DM9161 Interrupt Register */
  42 #define MII_DM9161_INTR 0x15
  43 #define MII_DM9161_INTR_PEND            0x8000
  44 #define MII_DM9161_INTR_DPLX_MASK       0x0800
  45 #define MII_DM9161_INTR_SPD_MASK        0x0400
  46 #define MII_DM9161_INTR_LINK_MASK       0x0200
  47 #define MII_DM9161_INTR_MASK            0x0100
  48 #define MII_DM9161_INTR_DPLX_CHANGE     0x0010
  49 #define MII_DM9161_INTR_SPD_CHANGE      0x0008
  50 #define MII_DM9161_INTR_LINK_CHANGE     0x0004
  51 #define MII_DM9161_INTR_INIT            0x0000
  52 #define MII_DM9161_INTR_STOP    \
  53 (MII_DM9161_INTR_DPLX_MASK | MII_DM9161_INTR_SPD_MASK \
  54  | MII_DM9161_INTR_LINK_MASK | MII_DM9161_INTR_MASK)
  55
  56 /* DM9161 10BT Configuration/Status */
  57 #define MII_DM9161_10BTCSR      0x12
  58 #define MII_DM9161_10BTCSR_INIT 0x7800
  59
  60 MODULE_DESCRIPTION("Davicom PHY driver");
  61 MODULE_AUTHOR("Andy Fleming");
  62 MODULE_LICENSE("GPL");
  63
  64
  65 #define DM9161_DELAY 1
  66 static int dm9161_config_intr(struct phy_device *phydev)
  67 {
  68         int temp;
  69
  70         temp = phy_read(phydev, MII_DM9161_INTR);
  71
  72         if (temp < 0)
  73                 return temp;
  74
  75         if(PHY_INTERRUPT_ENABLED == phydev->interrupts )
  76                 temp &= ~(MII_DM9161_INTR_STOP);
  77         else
  78                 temp |= MII_DM9161_INTR_STOP;
  79
  80         temp = phy_write(phydev, MII_DM9161_INTR, temp);
  81
  82         return temp;
  83 }
  84
  85 static int dm9161_config_aneg(struct phy_device *phydev)
  86 {
  87         int err;
  88
  89         /* Isolate the PHY */
  90         err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
  91
  92         if (err < 0)
  93                 return err;
  94
  95         /* Configure the new settings */
  96         err = genphy_config_aneg(phydev);
  97
  98         if (err < 0)
  99                 return err;
 100
 101         return 0;
 102 }
 103
 104 static int dm9161_config_init(struct phy_device *phydev)
 105 {
 106         int err;
 107
 108         /* Isolate the PHY */
 109         err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
 110
 111         if (err < 0)
 112                 return err;
 113
 114         /* Do not bypass the scrambler/descrambler */
 115         err = phy_write(phydev, MII_DM9161_SCR, MII_DM9161_SCR_INIT);
 116
 117         if (err < 0)
 118                 return err;
 119
 120         /* Clear 10BTCSR to default */
 121         err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
 122
 123         if (err < 0)
 124                 return err;
 125
 126         /* Reconnect the PHY, and enable Autonegotiation */
 127         err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
 128
 129         if (err < 0)
 130                 return err;
 131
 132         return 0;
 133 }
 134
 135 static int dm9161_ack_interrupt(struct phy_device *phydev)
 136 {
 137         int err = phy_read(phydev, MII_DM9161_INTR);
 138
 139         return (err < 0) ? err : 0;
 140 }
 141
 142 static struct phy_driver dm9161_driver = {
 143         .phy_id         = 0x0181b880,
 144         .name           = "Davicom DM9161E",
 145         .phy_id_mask    = 0x0ffffff0,
 146         .features       = PHY_BASIC_FEATURES,
 147         .config_init    = dm9161_config_init,
 148         .config_aneg    = dm9161_config_aneg,
 149         .read_status    = genphy_read_status,
 150         .driver         = { .owner = THIS_MODULE,},
 151 };
 152
 153 static struct phy_driver dm9131_driver = {
 154         .phy_id         = 0x00181b80,
 155         .name           = "Davicom DM9131",
 156         .phy_id_mask    = 0x0ffffff0,
 157         .features       = PHY_BASIC_FEATURES,
 158         .flags          = PHY_HAS_INTERRUPT,
 159         .config_aneg    = genphy_config_aneg,
 160         .read_status    = genphy_read_status,
 161         .ack_interrupt  = dm9161_ack_interrupt,
 162         .config_intr    = dm9161_config_intr,
 163         .driver         = { .owner = THIS_MODULE,},
 164 };
 165
 166 static int __init davicom_init(void)
 167 {
 168         int ret;
 169
 170         ret = phy_driver_register(&dm9161_driver);
 171         if (ret)
 172                 goto err1;
 173
 174         ret = phy_driver_register(&dm9131_driver);
 175         if (ret)
 176                 goto err2;
 177         return 0;
 178
 179  err2:
 180         phy_driver_unregister(&dm9161_driver);
 181  err1:
 182         return ret;
 183 }
 184
 185 static void __exit davicom_exit(void)
 186 {
 187         phy_driver_unregister(&dm9161_driver);
 188         phy_driver_unregister(&dm9131_driver);
 189 }
 190
 191 module_init(davicom_init);
 192 module_exit(davicom_exit);