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/IP101A/IC1001 PHY drivers");
  34 MODULE_AUTHOR("Michael Barkowski");
  35 MODULE_LICENSE("GPL");
  36
  37 /* IP101A/IP1001 */
  38 #define IP10XX_SPEC_CTRL_STATUS         16  /* Spec. Control Register */
  39 #define IP1001_SPEC_CTRL_STATUS_2       20  /* IP1001 Spec. Control Reg 2 */
  40 #define IP1001_PHASE_SEL_MASK           3 /* IP1001 RX/TXPHASE_SEL */
  41 #define IP1001_APS_ON                   11  /* IP1001 APS Mode  bit */
  42 #define IP101A_APS_ON                   2   /* IP101A APS Mode bit */
  43
  44 static int ip175c_config_init(struct phy_device *phydev)
  45 {
  46         int err, i;
  47         static int full_reset_performed = 0;
  48
  49         if (full_reset_performed == 0) {
  50
  51                 /* master reset */
  52                 err = mdiobus_write(phydev->bus, 30, 0, 0x175c);
  53                 if (err < 0)
  54                         return err;
  55
  56                 /* ensure no bus delays overlap reset period */
  57                 err = mdiobus_read(phydev->bus, 30, 0);
  58
  59                 /* data sheet specifies reset period is 2 msec */
  60                 mdelay(2);
  61
  62                 /* enable IP175C mode */
  63                 err = mdiobus_write(phydev->bus, 29, 31, 0x175c);
  64                 if (err < 0)
  65                         return err;
  66
  67                 /* Set MII0 speed and duplex (in PHY mode) */
  68                 err = mdiobus_write(phydev->bus, 29, 22, 0x420);
  69                 if (err < 0)
  70                         return err;
  71
  72                 /* reset switch ports */
  73                 for (i = 0; i < 5; i++) {
  74                         err = mdiobus_write(phydev->bus, i,
  75                                             MII_BMCR, BMCR_RESET);
  76                         if (err < 0)
  77                                 return err;
  78                 }
  79
  80                 for (i = 0; i < 5; i++)
  81                         err = mdiobus_read(phydev->bus, i, MII_BMCR);
  82
  83                 mdelay(2);
  84
  85                 full_reset_performed = 1;
  86         }
  87
  88         if (phydev->addr != 4) {
  89                 phydev->state = PHY_RUNNING;
  90                 phydev->speed = SPEED_100;
  91                 phydev->duplex = DUPLEX_FULL;
  92                 phydev->link = 1;
  93                 netif_carrier_on(phydev->attached_dev);
  94         }
  95
  96         return 0;
  97 }
  98
  99 static int ip1xx_reset(struct phy_device *phydev)
 100 {
 101         int err, bmcr;
 102
 103         /* Software Reset PHY */
 104         bmcr = phy_read(phydev, MII_BMCR);
 105         bmcr |= BMCR_RESET;
 106         err = phy_write(phydev, MII_BMCR, bmcr);
 107         if (err < 0)
 108                 return err;
 109
 110         do {
 111                 bmcr = phy_read(phydev, MII_BMCR);
 112         } while (bmcr & BMCR_RESET);
 113
 114         return err;
 115 }
 116
 117 static int ip1001_config_init(struct phy_device *phydev)
 118 {
 119         int c;
 120
 121         c = ip1xx_reset(phydev);
 122         if (c < 0)
 123                 return c;
 124
 125         /* Enable Auto Power Saving mode */
 126         c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
 127         c |= IP1001_APS_ON;
 128         if (c < 0)
 129                 return c;
 130
 131         if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
 132                 /* Additional delay (2ns) used to adjust RX clock phase
 133                  * at RGMII interface */
 134                 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
 135                 c |= IP1001_PHASE_SEL_MASK;
 136                 c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
 137         }
 138
 139         return c;
 140 }
 141
 142 static int ip101a_config_init(struct phy_device *phydev)
 143 {
 144         int c;
 145
 146         c = ip1xx_reset(phydev);
 147         if (c < 0)
 148                 return c;
 149
 150         /* Enable Auto Power Saving mode */
 151         c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
 152         c |= IP101A_APS_ON;
 153         return c;
 154 }
 155
 156 static int ip175c_read_status(struct phy_device *phydev)
 157 {
 158         if (phydev->addr == 4) /* WAN port */
 159                 genphy_read_status(phydev);
 160         else
 161                 /* Don't need to read status for switch ports */
 162                 phydev->irq = PHY_IGNORE_INTERRUPT;
 163
 164         return 0;
 165 }
 166
 167 static int ip175c_config_aneg(struct phy_device *phydev)
 168 {
 169         if (phydev->addr == 4) /* WAN port */
 170                 genphy_config_aneg(phydev);
 171
 172         return 0;
 173 }
 174
 175 static struct phy_driver ip175c_driver = {
 176         .phy_id         = 0x02430d80,
 177         .name           = "ICPlus IP175C",
 178         .phy_id_mask    = 0x0ffffff0,
 179         .features       = PHY_BASIC_FEATURES,
 180         .config_init    = &ip175c_config_init,
 181         .config_aneg    = &ip175c_config_aneg,
 182         .read_status    = &ip175c_read_status,
 183         .suspend        = genphy_suspend,
 184         .resume         = genphy_resume,
 185         .driver         = { .owner = THIS_MODULE,},
 186 };
 187
 188 static struct phy_driver ip1001_driver = {
 189         .phy_id         = 0x02430d90,
 190         .name           = "ICPlus IP1001",
 191         .phy_id_mask    = 0x0ffffff0,
 192         .features       = PHY_GBIT_FEATURES | SUPPORTED_Pause |
 193                           SUPPORTED_Asym_Pause,
 194         .config_init    = &ip1001_config_init,
 195         .config_aneg    = &genphy_config_aneg,
 196         .read_status    = &genphy_read_status,
 197         .suspend        = genphy_suspend,
 198         .resume         = genphy_resume,
 199         .driver         = { .owner = THIS_MODULE,},
 200 };
 201
 202 static struct phy_driver ip101a_driver = {
 203         .phy_id         = 0x02430c54,
 204         .name           = "ICPlus IP101A",
 205         .phy_id_mask    = 0x0ffffff0,
 206         .features       = PHY_BASIC_FEATURES | SUPPORTED_Pause |
 207                           SUPPORTED_Asym_Pause,
 208         .config_init    = &ip101a_config_init,
 209         .config_aneg    = &genphy_config_aneg,
 210         .read_status    = &genphy_read_status,
 211         .suspend        = genphy_suspend,
 212         .resume         = genphy_resume,
 213         .driver         = { .owner = THIS_MODULE,},
 214 };
 215
 216 static int __init icplus_init(void)
 217 {
 218         int ret = 0;
 219
 220         ret = phy_driver_register(&ip1001_driver);
 221         if (ret < 0)
 222                 return -ENODEV;
 223
 224         ret = phy_driver_register(&ip101a_driver);
 225         if (ret < 0)
 226                 return -ENODEV;
 227
 228         return phy_driver_register(&ip175c_driver);
 229 }
 230
 231 static void __exit icplus_exit(void)
 232 {
 233         phy_driver_unregister(&ip1001_driver);
 234         phy_driver_unregister(&ip101a_driver);
 235         phy_driver_unregister(&ip175c_driver);
 236 }
 237
 238 module_init(icplus_init);
 239 module_exit(icplus_exit);
 240
 241 static struct mdio_device_id __maybe_unused icplus_tbl[] = {
 242         { 0x02430d80, 0x0ffffff0 },
 243         { 0x02430d90, 0x0ffffff0 },
 244         { }
 245 };
 246
 247 MODULE_DEVICE_TABLE(mdio, icplus_tbl);