atheros.c
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/*
* drivers/net/phy/atheros.c
*
* Driver for Atheros PHYs
*
* Author: Michael Johnston <[hidden email]>
* Chunhe Lan <[hidden email]>
*
* Copyright (c) 2013 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/phy.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#define AT803X_INTR_ENABLE 0x12
#define AT803X_INTR_STATUS 0x13
#define AT803X_DEBUG_ADDR 0x1D
#define AT803X_DEBUG_DATA 0x1E
#define AT803X_DEBUG_SYSTEM_MODE_CTRL 0x05
#define AT803X_DEBUG_RGMII_TX_CLK_DLY BIT(8)
MODULE_DESCRIPTION("Atheros PHY driver");
MODULE_AUTHOR("Michael Johnston");
MODULE_LICENSE("GPL");
static int ar8035_ack_interrupt(struct phy_device *phydev)
{
int err;
err = phy_read(phydev, AT803X_INTR_STATUS);
return (err < 0) ? err : 0;
}
static int ar8035_config_intr(struct phy_device *phydev)
{
int val;
int ret;
u32 features;
features = SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_AUI |
SUPPORTED_FIBRE | SUPPORTED_BNC;
val = phy_read(phydev, MII_BMSR);
if (val < 0)
return val;
if (val & BMSR_ANEGCAPABLE)
features |= SUPPORTED_Autoneg;
if (val & BMSR_100FULL)
features |= SUPPORTED_100baseT_Full;
if (val & BMSR_100HALF)
features |= SUPPORTED_100baseT_Half;
if (val & BMSR_10FULL)
features |= SUPPORTED_10baseT_Full;
if (val & BMSR_10HALF)
features |= SUPPORTED_10baseT_Half;
if (val & BMSR_ESTATEN) {
val = phy_read(phydev, MII_ESTATUS);
if (val < 0)
return val;
if (val & ESTATUS_1000_TFULL)
features |= SUPPORTED_1000baseT_Full;
if (val & ESTATUS_1000_THALF)
features |= SUPPORTED_1000baseT_Half;
}
phydev->supported = features;
phydev->advertising = features;
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
ret = phy_write(phydev, AT803X_DEBUG_ADDR,
AT803X_DEBUG_SYSTEM_MODE_CTRL);
if (ret)
return ret;
ret = phy_write(phydev, AT803X_DEBUG_DATA,
AT803X_DEBUG_RGMII_TX_CLK_DLY);
if (ret)
return ret;
}
return 0;
}
/* AR8035 */
static struct phy_driver ar8035_driver = {
.phy_id = 0x004dd072,
.name = "AR8035 Gigabit Ethernet",
.phy_id_mask = 0xffffffef,
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = ar8035_ack_interrupt,
.config_intr = ar8035_config_intr,
.driver = {
.owner = THIS_MODULE,
},
};
static int __init atheros_init(void)
{
int ret;
ret = phy_driver_register(&ar8035_driver);
if (ret < 0)
pr_warn("AR8035: phy_driver_register is error\n");
return ret;
}
static void __exit atheros_exit(void)
{
phy_driver_unregister(&ar8035_driver);
}
module_init(atheros_init);
module_exit(atheros_exit);
static struct mdio_device_id __maybe_unused atheros_tbl[] = {
{ 0x004dd072, 0x007fffff },
{ }
};
MODULE_DEVICE_TABLE(mdio, atheros_tbl);