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/*
* ADM6996 switch driver
*
* Copyright (c) 2008 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License v2 as published by the
* Free Software Foundation
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include "adm6996.h"
MODULE_DESCRIPTION("Infineon ADM6996 Switch");
MODULE_AUTHOR("Felix Fietkau");
MODULE_LICENSE("GPL");
struct adm6996_priv {
/* use abstraction for regops, we want to add gpio support in the future */
u16 (*read)(struct phy_device *phydev, enum admreg reg);
void (*write)(struct phy_device *phydev, enum admreg reg, u16 val);
};
#define to_adm(_phy) ((struct adm6996_priv *) (_phy)->priv)
static inline u16
r16(struct phy_device *pdev, enum admreg reg)
{
return to_adm(pdev)->read(pdev, reg);
}
static inline void
w16(struct phy_device *pdev, enum admreg reg, u16 val)
{
to_adm(pdev)->write(pdev, reg, val);
}
static u16
adm6996_read_mii_reg(struct phy_device *phydev, enum admreg reg)
{
return phydev->bus->read(phydev->bus, PHYADDR(reg));
}
static void
adm6996_write_mii_reg(struct phy_device *phydev, enum admreg reg, u16 val)
{
phydev->bus->write(phydev->bus, PHYADDR(reg), val);
}
static int adm6996_config_init(struct phy_device *pdev)
{
int i;
printk("%s: ADM6996 PHY driver attached.\n", pdev->attached_dev->name);
pdev->supported = ADVERTISED_100baseT_Full;
pdev->advertising = ADVERTISED_100baseT_Full;
/* initialize port and vlan settings */
for (i = 0; i < ADM_PHY_PORTS; i++) {
w16(pdev, adm_portcfg[i], ADM_PORTCFG_INIT |
ADM_PORTCFG_PVID((i == ADM_WAN_PORT) ? 1 : 0));
}
w16(pdev, adm_portcfg[5], ADM_PORTCFG_CPU);
/* reset all ports */
for (i = 0; i < ADM_PHY_PORTS; i++) {
w16(pdev, ADM_PHY_PORT(i), ADM_PHYCFG_INIT);
}
return 0;
}
static int adm6996_read_status(struct phy_device *phydev)
{
phydev->speed = SPEED_100;
phydev->duplex = DUPLEX_FULL;
phydev->state = PHY_UP;
return 0;
}
static int adm6996_config_aneg(struct phy_device *phydev)
{
return 0;
}
static int adm6996_probe(struct phy_device *pdev)
{
struct adm6996_priv *priv;
priv = kzalloc(sizeof(struct adm6996_priv), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
priv->read = adm6996_read_mii_reg;
priv->write = adm6996_write_mii_reg;
pdev->priv = priv;
return 0;
}
static void adm6996_remove(struct phy_device *pdev)
{
kfree(pdev->priv);
}
static bool adm6996_detect(struct mii_bus *bus, int addr)
{
u16 reg;
/* we only attach to phy id 0 */
if (addr != 0)
return false;
/* look for the switch on the bus */
reg = bus->read(bus, PHYADDR(ADM_SIG0)) & ADM_SIG0_MASK;
if (reg != ADM_SIG0_VAL)
return false;
reg = bus->read(bus, PHYADDR(ADM_SIG1)) & ADM_SIG1_MASK;
if (reg != ADM_SIG1_VAL)
return false;
return true;
}
static struct phy_driver adm6996_driver = {
.name = "Infineon ADM6996",
.features = PHY_BASIC_FEATURES,
.detect = adm6996_detect,
.probe = adm6996_probe,
.remove = adm6996_remove,
.config_init = &adm6996_config_init,
.config_aneg = &adm6996_config_aneg,
.read_status = &adm6996_read_status,
.driver = { .owner = THIS_MODULE,},
};
static int __init adm6996_init(void)
{
return phy_driver_register(&adm6996_driver);
}
static void __exit adm6996_exit(void)
{
phy_driver_unregister(&adm6996_driver);
}
module_init(adm6996_init);
module_exit(adm6996_exit);
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