LXR linux/drivers/net/phy/amd.c

   1/*
   2 * Driver for AMD am79c PHYs
   3 *
   4 * Author: Heiko Schocher <hs@denx.de>
   5 *
   6 * Copyright (c) 2011 DENX Software Engineering GmbH
   7 *
   8 * This program is free software; you can redistribute  it and/or modify it
   9 * under  the terms of  the GNU General  Public License as published by the
  10 * Free Software Foundation;  either version 2 of the  License, or (at your
  11 * option) any later version.
  12 *
  13 */
  14#include <linux/kernel.h>
  15#include <linux/errno.h>
  16#include <linux/init.h>
  17#include <linux/module.h>
  18#include <linux/mii.h>
  19#include <linux/phy.h>
  20
  21#define PHY_ID_AM79C874         0x0022561b
  22
  23#define MII_AM79C_IR            17      /* Interrupt Status/Control Register */
  24#define MII_AM79C_IR_EN_LINK    0x0400  /* IR enable Linkstate */
  25#define MII_AM79C_IR_EN_ANEG    0x0100  /* IR enable Aneg Complete */
  26#define MII_AM79C_IR_IMASK_INIT (MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG)
  27
  28MODULE_DESCRIPTION("AMD PHY driver");
  29MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
  30MODULE_LICENSE("GPL");
  31
  32static int am79c_ack_interrupt(struct phy_device *phydev)
  33{
  34        int err;
  35
  36        err = phy_read(phydev, MII_BMSR);
  37        if (err < 0)
  38                return err;
  39
  40        err = phy_read(phydev, MII_AM79C_IR);
  41        if (err < 0)
  42                return err;
  43
  44        return 0;
  45}
  46
  47static int am79c_config_init(struct phy_device *phydev)
  48{
  49        return 0;
  50}
  51
  52static int am79c_config_intr(struct phy_device *phydev)
  53{
  54        int err;
  55
  56        if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  57                err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);
  58        else
  59                err = phy_write(phydev, MII_AM79C_IR, 0);
  60
  61        return err;
  62}
  63
  64static struct phy_driver am79c_driver[] = { {
  65        .phy_id         = PHY_ID_AM79C874,
  66        .name           = "AM79C874",
  67        .phy_id_mask    = 0xfffffff0,
  68        .features       = PHY_BASIC_FEATURES,
  69        .flags          = PHY_HAS_INTERRUPT,
  70        .config_init    = am79c_config_init,
  71        .config_aneg    = genphy_config_aneg,
  72        .read_status    = genphy_read_status,
  73        .ack_interrupt  = am79c_ack_interrupt,
  74        .config_intr    = am79c_config_intr,
  75} };
  76
  77module_phy_driver(am79c_driver);
  78
  79static struct mdio_device_id __maybe_unused amd_tbl[] = {
  80        { PHY_ID_AM79C874, 0xfffffff0 },
  81        { }
  82};
  83
  84MODULE_DEVICE_TABLE(mdio, amd_tbl);
  85