drivers/net/phy/icplus.c

   1 /*
   2  * Driver for ICPlus PHYs
   3  *
   4  * Copyright (c) 2007 Freescale Semiconductor, Inc.
   5  *
   6  * This program is free software; you can redistribute  it and/or modify it
   7  * under  the terms of  the GNU General  Public License as published by the
   8  * Free Software Foundation;  either version 2 of the  License, or (at your
   9  * option) any later version.
  10  *
  11  */
  12 #include <linux/kernel.h>
  13 #include <linux/string.h>
  14 #include <linux/errno.h>
  15 #include <linux/unistd.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/spinlock.h>
  23 #include <linux/mm.h>
  24 #include <linux/module.h>
  25 #include <linux/mii.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/phy.h>
  28
  29 #include <asm/io.h>
  30 #include <asm/irq.h>
  31 #include <asm/uaccess.h>
  32
  33 MODULE_DESCRIPTION("ICPlus IP175C/IC1001 PHY drivers");
  34 MODULE_AUTHOR("Michael Barkowski");
  35 MODULE_LICENSE("GPL");
  36
  37 static int ip175c_config_init(struct phy_device *phydev)
  38 {
  39         int err, i;
  40         static int full_reset_performed = 0;
  41
  42         if (full_reset_performed == 0) {
  43
  44                 /* master reset */
  45                 err = phydev->bus->write(phydev->bus, 30, 0, 0x175c);
  46                 if (err < 0)
  47                         return err;
  48
  49                 /* ensure no bus delays overlap reset period */
  50                 err = phydev->bus->read(phydev->bus, 30, 0);
  51
  52                 /* data sheet specifies reset period is 2 msec */
  53                 mdelay(2);
  54
  55                 /* enable IP175C mode */
  56                 err = phydev->bus->write(phydev->bus, 29, 31, 0x175c);
  57                 if (err < 0)
  58                         return err;
  59
  60                 /* Set MII0 speed and duplex (in PHY mode) */
  61                 err = phydev->bus->write(phydev->bus, 29, 22, 0x420);
  62                 if (err < 0)
  63                         return err;
  64
  65                 /* reset switch ports */
  66                 for (i = 0; i < 5; i++) {
  67                         err = phydev->bus->write(phydev->bus, i,
  68                                                  MII_BMCR, BMCR_RESET);
  69                         if (err < 0)
  70                                 return err;
  71                 }
  72
  73                 for (i = 0; i < 5; i++)
  74                         err = phydev->bus->read(phydev->bus, i, MII_BMCR);
  75
  76                 mdelay(2);
  77
  78                 full_reset_performed = 1;
  79         }
  80
  81         if (phydev->addr != 4) {
  82                 phydev->state = PHY_RUNNING;
  83                 phydev->speed = SPEED_100;
  84                 phydev->duplex = DUPLEX_FULL;
  85                 phydev->link = 1;
  86                 netif_carrier_on(phydev->attached_dev);
  87         }
  88
  89         return 0;
  90 }
  91
  92 static int ip1001_config_init(struct phy_device *phydev)
  93 {
  94         int err, value;
  95
  96         /* Software Reset PHY */
  97         value = phy_read(phydev, MII_BMCR);
  98         value |= BMCR_RESET;
  99         err = phy_write(phydev, MII_BMCR, value);
 100         if (err < 0)
 101                 return err;
 102
 103         do {
 104                 value = phy_read(phydev, MII_BMCR);
 105         } while (value & BMCR_RESET);
 106
 107         /* Additional delay (2ns) used to adjust RX clock phase
 108          * at GMII/ RGMII interface */
 109         value = phy_read(phydev, 16);
 110         value |= 0x3;
 111
 112         err = phy_write(phydev, 16, value);
 113         if (err < 0)
 114                 return err;
 115
 116         return err;
 117 }
 118
 119 static int ip175c_read_status(struct phy_device *phydev)
 120 {
 121         if (phydev->addr == 4) /* WAN port */
 122                 genphy_read_status(phydev);
 123         else
 124                 /* Don't need to read status for switch ports */
 125                 phydev->irq = PHY_IGNORE_INTERRUPT;
 126
 127         return 0;
 128 }
 129
 130 static int ip175c_config_aneg(struct phy_device *phydev)
 131 {
 132         if (phydev->addr == 4) /* WAN port */
 133                 genphy_config_aneg(phydev);
 134
 135         return 0;
 136 }
 137
 138 static struct phy_driver ip175c_driver = {
 139         .phy_id         = 0x02430d80,
 140         .name           = "ICPlus IP175C",
 141         .phy_id_mask    = 0x0ffffff0,
 142         .features       = PHY_BASIC_FEATURES,
 143         .config_init    = &ip175c_config_init,
 144         .config_aneg    = &ip175c_config_aneg,
 145         .read_status    = &ip175c_read_status,
 146         .suspend        = genphy_suspend,
 147         .resume         = genphy_resume,
 148         .driver         = { .owner = THIS_MODULE,},
 149 };
 150
 151 static struct phy_driver ip1001_driver = {
 152         .phy_id         = 0x02430d90,
 153         .name           = "ICPlus IP1001",
 154         .phy_id_mask    = 0x0ffffff0,
 155         .features       = PHY_GBIT_FEATURES | SUPPORTED_Pause |
 156                           SUPPORTED_Asym_Pause,
 157         .config_init    = &ip1001_config_init,
 158         .config_aneg    = &genphy_config_aneg,
 159         .read_status    = &genphy_read_status,
 160         .suspend        = genphy_suspend,
 161         .resume         = genphy_resume,
 162         .driver         = { .owner = THIS_MODULE,},
 163 };
 164
 165 static int __init icplus_init(void)
 166 {
 167         int ret = 0;
 168
 169         ret = phy_driver_register(&ip1001_driver);
 170         if (ret < 0)
 171                 return -ENODEV;
 172
 173         return phy_driver_register(&ip175c_driver);
 174 }
 175
 176 static void __exit icplus_exit(void)
 177 {
 178         phy_driver_unregister(&ip1001_driver);
 179         phy_driver_unregister(&ip175c_driver);
 180 }
 181
 182 module_init(icplus_init);
 183 module_exit(icplus_exit);
 184
 185 static struct mdio_device_id __maybe_unused icplus_tbl[] = {
 186         { 0x02430d80, 0x0ffffff0 },
 187         { 0x02430d90, 0x0ffffff0 },
 188         { }
 189 };
 190
 191 MODULE_DEVICE_TABLE(mdio, icplus_tbl);