LXR linux/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
  35static 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
  56static 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
  75static 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
  84static 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        .driver = {.owner = THIS_MODULE,}
  99}, {
 100        .phy_id = STE100P_PHY_ID,
 101        .phy_id_mask = 0xffffffff,
 102        .name = "STe100p",
 103        .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
 104        .flags = PHY_HAS_INTERRUPT,
 105        .config_init = ste10Xp_config_init,
 106        .config_aneg = genphy_config_aneg,
 107        .read_status = genphy_read_status,
 108        .ack_interrupt = ste10Xp_ack_interrupt,
 109        .config_intr = ste10Xp_config_intr,
 110        .suspend = genphy_suspend,
 111        .resume = genphy_resume,
 112        .driver = {.owner = THIS_MODULE,}
 113} };
 114
 115module_phy_driver(ste10xp_pdriver);
 116
 117static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = {
 118        { STE101P_PHY_ID, 0xfffffff0 },
 119        { STE100P_PHY_ID, 0xffffffff },
 120        { }
 121};
 122
 123MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl);
 124
 125MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver");
 126MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 127MODULE_LICENSE("GPL");
 128