drivers/net/phy/ste10Xp.c

   1 /*
   2  * drivers/net/phy/ste10Xp.c
   3  *
   4  * Driver for STMicroelectronics STe10Xp PHYs
   5  *
   6  * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
   7  *
   8  * Copyright (c) 2008 STMicroelectronics Limited
   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
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/sched.h>
  20 #include <linux/kernel.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/mii.h>
  26 #include <linux/phy.h>
  27
  28 #define MII_XCIIS       0x11    /* Configuration Info IRQ & Status Reg */
  29 #define MII_XIE         0x12    /* Interrupt Enable Register */
  30 #define MII_XIE_DEFAULT_MASK 0x0070 /* ANE complete, Remote Fault, Link Down */
  31
  32 #define STE101P_PHY_ID          0x00061c50
  33 #define STE100P_PHY_ID          0x1c040011
  34
  35 static int ste10Xp_config_init(struct phy_device *phydev)
  36 {
  37         int value, err;
  38
  39         /* Software Reset PHY */
  40         value = phy_read(phydev, MII_BMCR);
  41         if (value < 0)
  42                 return value;
  43
  44         value |= BMCR_RESET;
  45         err = phy_write(phydev, MII_BMCR, value);
  46         if (err < 0)
  47                 return err;
  48
  49         do {
  50                 value = phy_read(phydev, MII_BMCR);
  51         } while (value & BMCR_RESET);
  52
  53         return 0;
  54 }
  55
  56 static int ste10Xp_config_intr(struct phy_device *phydev)
  57 {
  58         int err, value;
  59
  60         if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
  61                 /* Enable all STe101P interrupts (PR12) */
  62                 err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK);
  63                 /* clear any pending interrupts */
  64                 if (err == 0) {
  65                         value = phy_read(phydev, MII_XCIIS);
  66                         if (value < 0)
  67                                 err = value;
  68                 }
  69         } else
  70                 err = phy_write(phydev, MII_XIE, 0);
  71
  72         return err;
  73 }
  74
  75 static int ste10Xp_ack_interrupt(struct phy_device *phydev)
  76 {
  77         int err = phy_read(phydev, MII_XCIIS);
  78         if (err < 0)
  79                 return err;
  80
  81         return 0;
  82 }
  83
  84 static struct phy_driver ste10xp_pdriver[] = {
  85 {
  86         .phy_id = STE101P_PHY_ID,
  87         .phy_id_mask = 0xfffffff0,
  88         .name = "STe101p",
  89         .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
  90         .flags = PHY_HAS_INTERRUPT,
  91         .config_init = ste10Xp_config_init,
  92         .config_aneg = genphy_config_aneg,
  93         .read_status = genphy_read_status,
  94         .ack_interrupt = ste10Xp_ack_interrupt,
  95         .config_intr = ste10Xp_config_intr,
  96         .suspend = genphy_suspend,
  97         .resume = genphy_resume,
  98 }, {
  99         .phy_id = STE100P_PHY_ID,
 100         .phy_id_mask = 0xffffffff,
 101         .name = "STe100p",
 102         .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
 103         .flags = PHY_HAS_INTERRUPT,
 104         .config_init = ste10Xp_config_init,
 105         .config_aneg = genphy_config_aneg,
 106         .read_status = genphy_read_status,
 107         .ack_interrupt = ste10Xp_ack_interrupt,
 108         .config_intr = ste10Xp_config_intr,
 109         .suspend = genphy_suspend,
 110         .resume = genphy_resume,
 111 } };
 112
 113 module_phy_driver(ste10xp_pdriver);
 114
 115 static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = {
 116         { STE101P_PHY_ID, 0xfffffff0 },
 117         { STE100P_PHY_ID, 0xffffffff },
 118         { }
 119 };
 120
 121 MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl);
 122
 123 MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver");
 124 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 125 MODULE_LICENSE("GPL");