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/interrupt.h>
  21 #include <linux/init.h>
  22 #include <linux/delay.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/mm.h>
  28 #include <linux/module.h>
  29 #include <linux/mii.h>
  30 #include <linux/ethtool.h>
  31 #include <linux/phy.h>
  32
  33 #include <asm/io.h>
  34 #include <asm/irq.h>
  35 #include <asm/uaccess.h>
  36
  37 #define MII_DM9161_SCR          0x10
  38 #define MII_DM9161_SCR_INIT     0x0610
  39 #define MII_DM9161_SCR_RMII     0x0100
  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, temp;
 107
 108         /* Isolate the PHY */
 109         err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
 110
 111         if (err < 0)
 112                 return err;
 113
 114         switch (phydev->interface) {
 115         case PHY_INTERFACE_MODE_MII:
 116                 temp = MII_DM9161_SCR_INIT;
 117                 break;
 118         case PHY_INTERFACE_MODE_RMII:
 119                 temp =  MII_DM9161_SCR_INIT | MII_DM9161_SCR_RMII;
 120                 break;
 121         default:
 122                 return -EINVAL;
 123         }
 124
 125         /* Do not bypass the scrambler/descrambler */
 126         err = phy_write(phydev, MII_DM9161_SCR, temp);
 127         if (err < 0)
 128                 return err;
 129
 130         /* Clear 10BTCSR to default */
 131         err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
 132
 133         if (err < 0)
 134                 return err;
 135
 136         /* Reconnect the PHY, and enable Autonegotiation */
 137         err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
 138
 139         if (err < 0)
 140                 return err;
 141
 142         return 0;
 143 }
 144
 145 static int dm9161_ack_interrupt(struct phy_device *phydev)
 146 {
 147         int err = phy_read(phydev, MII_DM9161_INTR);
 148
 149         return (err < 0) ? err : 0;
 150 }
 151
 152 static struct phy_driver dm9161e_driver = {
 153         .phy_id         = 0x0181b880,
 154         .name           = "Davicom DM9161E",
 155         .phy_id_mask    = 0x0ffffff0,
 156         .features       = PHY_BASIC_FEATURES,
 157         .config_init    = dm9161_config_init,
 158         .config_aneg    = dm9161_config_aneg,
 159         .read_status    = genphy_read_status,
 160         .driver         = { .owner = THIS_MODULE,},
 161 };
 162
 163 static struct phy_driver dm9161a_driver = {
 164         .phy_id         = 0x0181b8a0,
 165         .name           = "Davicom DM9161A",
 166         .phy_id_mask    = 0x0ffffff0,
 167         .features       = PHY_BASIC_FEATURES,
 168         .config_init    = dm9161_config_init,
 169         .config_aneg    = dm9161_config_aneg,
 170         .read_status    = genphy_read_status,
 171         .driver         = { .owner = THIS_MODULE,},
 172 };
 173
 174 static struct phy_driver dm9131_driver = {
 175         .phy_id         = 0x00181b80,
 176         .name           = "Davicom DM9131",
 177         .phy_id_mask    = 0x0ffffff0,
 178         .features       = PHY_BASIC_FEATURES,
 179         .flags          = PHY_HAS_INTERRUPT,
 180         .config_aneg    = genphy_config_aneg,
 181         .read_status    = genphy_read_status,
 182         .ack_interrupt  = dm9161_ack_interrupt,
 183         .config_intr    = dm9161_config_intr,
 184         .driver         = { .owner = THIS_MODULE,},
 185 };
 186
 187 static int __init davicom_init(void)
 188 {
 189         int ret;
 190
 191         ret = phy_driver_register(&dm9161e_driver);
 192         if (ret)
 193                 goto err1;
 194
 195         ret = phy_driver_register(&dm9161a_driver);
 196         if (ret)
 197                 goto err2;
 198
 199         ret = phy_driver_register(&dm9131_driver);
 200         if (ret)
 201                 goto err3;
 202         return 0;
 203
 204  err3:
 205         phy_driver_unregister(&dm9161a_driver);
 206  err2:
 207         phy_driver_unregister(&dm9161e_driver);
 208  err1:
 209         return ret;
 210 }
 211
 212 static void __exit davicom_exit(void)
 213 {
 214         phy_driver_unregister(&dm9161e_driver);
 215         phy_driver_unregister(&dm9161a_driver);
 216         phy_driver_unregister(&dm9131_driver);
 217 }
 218
 219 module_init(davicom_init);
 220 module_exit(davicom_exit);
 221
 222 static struct mdio_device_id __maybe_unused davicom_tbl[] = {
 223         { 0x0181b880, 0x0ffffff0 },
 224         { 0x0181b8a0, 0x0ffffff0 },
 225         { 0x00181b80, 0x0ffffff0 },
 226         { }
 227 };
 228
 229 MODULE_DEVICE_TABLE(mdio, davicom_tbl);