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 #define MII_DM9161_SCR_RMII     0x0100
  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, temp;
 108
 109         /* Isolate the PHY */
 110         err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
 111
 112         if (err < 0)
 113                 return err;
 114
 115         switch (phydev->interface) {
 116         case PHY_INTERFACE_MODE_MII:
 117                 temp = MII_DM9161_SCR_INIT;
 118                 break;
 119         case PHY_INTERFACE_MODE_RMII:
 120                 temp =  MII_DM9161_SCR_INIT | MII_DM9161_SCR_RMII;
 121                 break;
 122         default:
 123                 return -EINVAL;
 124         }
 125
 126         /* Do not bypass the scrambler/descrambler */
 127         err = phy_write(phydev, MII_DM9161_SCR, temp);
 128         if (err < 0)
 129                 return err;
 130
 131         /* Clear 10BTCSR to default */
 132         err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
 133
 134         if (err < 0)
 135                 return err;
 136
 137         /* Reconnect the PHY, and enable Autonegotiation */
 138         err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
 139
 140         if (err < 0)
 141                 return err;
 142
 143         return 0;
 144 }
 145
 146 static int dm9161_ack_interrupt(struct phy_device *phydev)
 147 {
 148         int err = phy_read(phydev, MII_DM9161_INTR);
 149
 150         return (err < 0) ? err : 0;
 151 }
 152
 153 static struct phy_driver dm9161e_driver = {
 154         .phy_id         = 0x0181b880,
 155         .name           = "Davicom DM9161E",
 156         .phy_id_mask    = 0x0ffffff0,
 157         .features       = PHY_BASIC_FEATURES,
 158         .config_init    = dm9161_config_init,
 159         .config_aneg    = dm9161_config_aneg,
 160         .read_status    = genphy_read_status,
 161         .driver         = { .owner = THIS_MODULE,},
 162 };
 163
 164 static struct phy_driver dm9161a_driver = {
 165         .phy_id         = 0x0181b8a0,
 166         .name           = "Davicom DM9161A",
 167         .phy_id_mask    = 0x0ffffff0,
 168         .features       = PHY_BASIC_FEATURES,
 169         .config_init    = dm9161_config_init,
 170         .config_aneg    = dm9161_config_aneg,
 171         .read_status    = genphy_read_status,
 172         .driver         = { .owner = THIS_MODULE,},
 173 };
 174
 175 static struct phy_driver dm9131_driver = {
 176         .phy_id         = 0x00181b80,
 177         .name           = "Davicom DM9131",
 178         .phy_id_mask    = 0x0ffffff0,
 179         .features       = PHY_BASIC_FEATURES,
 180         .flags          = PHY_HAS_INTERRUPT,
 181         .config_aneg    = genphy_config_aneg,
 182         .read_status    = genphy_read_status,
 183         .ack_interrupt  = dm9161_ack_interrupt,
 184         .config_intr    = dm9161_config_intr,
 185         .driver         = { .owner = THIS_MODULE,},
 186 };
 187
 188 static int __init davicom_init(void)
 189 {
 190         int ret;
 191
 192         ret = phy_driver_register(&dm9161e_driver);
 193         if (ret)
 194                 goto err1;
 195
 196         ret = phy_driver_register(&dm9161a_driver);
 197         if (ret)
 198                 goto err2;
 199
 200         ret = phy_driver_register(&dm9131_driver);
 201         if (ret)
 202                 goto err3;
 203         return 0;
 204
 205  err3:
 206         phy_driver_unregister(&dm9161a_driver);
 207  err2:
 208         phy_driver_unregister(&dm9161e_driver);
 209  err1:
 210         return ret;
 211 }
 212
 213 static void __exit davicom_exit(void)
 214 {
 215         phy_driver_unregister(&dm9161e_driver);
 216         phy_driver_unregister(&dm9161a_driver);
 217         phy_driver_unregister(&dm9131_driver);
 218 }
 219
 220 module_init(davicom_init);
 221 module_exit(davicom_exit);