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/*
* Driver for Vitesse PHYs
*
* Author: Kriston Carson
*
* Copyright (c) 2005, 2009 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/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
/* Vitesse Extended Control Register 1 */
#define MII_VSC8244_EXT_CON1 0x17
#define MII_VSC8244_EXTCON1_INIT 0x0000
#define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00
#define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300
#define MII_VSC8244_EXTCON1_TX_SKEW 0x0800
#define MII_VSC8244_EXTCON1_RX_SKEW 0x0200
/* Vitesse Interrupt Mask Register */
#define MII_VSC8244_IMASK 0x19
#define MII_VSC8244_IMASK_IEN 0x8000
#define MII_VSC8244_IMASK_SPEED 0x4000
#define MII_VSC8244_IMASK_LINK 0x2000
#define MII_VSC8244_IMASK_DUPLEX 0x1000
#define MII_VSC8244_IMASK_MASK 0xf000
#define MII_VSC8221_IMASK_MASK 0xa000
/* Vitesse Interrupt Status Register */
#define MII_VSC8244_ISTAT 0x1a
#define MII_VSC8244_ISTAT_STATUS 0x8000
#define MII_VSC8244_ISTAT_SPEED 0x4000
#define MII_VSC8244_ISTAT_LINK 0x2000
#define MII_VSC8244_ISTAT_DUPLEX 0x1000
/* Vitesse Auxiliary Control/Status Register */
#define MII_VSC8244_AUX_CONSTAT 0x1c
#define MII_VSC8244_AUXCONSTAT_INIT 0x0000
#define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
#define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
#define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
#define MII_VSC8244_AUXCONSTAT_100 0x0008
#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
#define PHY_ID_VSC8244 0x000fc6c0
#define PHY_ID_VSC8221 0x000fc550
MODULE_DESCRIPTION("Vitesse PHY driver");
MODULE_AUTHOR("Kriston Carson");
MODULE_LICENSE("GPL");
static int vsc824x_add_skew(struct phy_device *phydev)
{
int err;
int extcon;
extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
if (extcon < 0)
return extcon;
extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
MII_VSC8244_EXTCON1_RX_SKEW_MASK);
extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
MII_VSC8244_EXTCON1_RX_SKEW);
err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
return err;
}
static int vsc824x_config_init(struct phy_device *phydev)
{
int err;
err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
MII_VSC8244_AUXCONSTAT_INIT);
if (err < 0)
return err;
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
err = vsc824x_add_skew(phydev);
return err;
}
static int vsc824x_ack_interrupt(struct phy_device *phydev)
{
int err = 0;
/*
* Don't bother to ACK the interrupts if interrupts
* are disabled. The 824x cannot clear the interrupts
* if they are disabled.
*/
if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
err = phy_read(phydev, MII_VSC8244_ISTAT);
return (err < 0) ? err : 0;
}
static int vsc82xx_config_intr(struct phy_device *phydev)
{
int err;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
err = phy_write(phydev, MII_VSC8244_IMASK,
phydev->drv->phy_id == PHY_ID_VSC8244 ?
MII_VSC8244_IMASK_MASK :
MII_VSC8221_IMASK_MASK);
else {
/*
* The Vitesse PHY cannot clear the interrupt
* once it has disabled them, so we clear them first
*/
err = phy_read(phydev, MII_VSC8244_ISTAT);
if (err < 0)
return err;
err = phy_write(phydev, MII_VSC8244_IMASK, 0);
}
return err;
}
static int vsc8221_config_init(struct phy_device *phydev)
{
int err;
err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
MII_VSC8221_AUXCONSTAT_INIT);
return err;
/* Perhaps we should set EXT_CON1 based on the interface?
Options are 802.3Z SerDes or SGMII */
}
/* Vitesse 824x */
static struct phy_driver vsc82xx_driver[] = {
{
.phy_id = PHY_ID_VSC8244,
.name = "Vitesse VSC8244",
.phy_id_mask = 0x000fffc0,
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_init = &vsc824x_config_init,
.config_aneg = &genphy_config_aneg,
.read_status = &genphy_read_status,
.ack_interrupt = &vsc824x_ack_interrupt,
.config_intr = &vsc82xx_config_intr,
.driver = { .owner = THIS_MODULE,},
}, {
/* Vitesse 8221 */
.phy_id = PHY_ID_VSC8221,
.phy_id_mask = 0x000ffff0,
.name = "Vitesse VSC8221",
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_init = &vsc8221_config_init,
.config_aneg = &genphy_config_aneg,
.read_status = &genphy_read_status,
.ack_interrupt = &vsc824x_ack_interrupt,
.config_intr = &vsc82xx_config_intr,
.driver = { .owner = THIS_MODULE,},
} };
static int __init vsc82xx_init(void)
{
return phy_drivers_register(vsc82xx_driver,
ARRAY_SIZE(vsc82xx_driver));
}
static void __exit vsc82xx_exit(void)
{
return phy_drivers_unregister(vsc82xx_driver,
ARRAY_SIZE(vsc82xx_driver));
}
module_init(vsc82xx_init);
module_exit(vsc82xx_exit);
static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
{ PHY_ID_VSC8244, 0x000fffc0 },
{ PHY_ID_VSC8221, 0x000ffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, vitesse_tbl);
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