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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Microchip Technology
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/phy.h>
/* Interrupt Source Register */
#define LAN87XX_INTERRUPT_SOURCE (0x18)
/* Interrupt Mask Register */
#define LAN87XX_INTERRUPT_MASK (0x19)
#define LAN87XX_MASK_LINK_UP (0x0004)
#define LAN87XX_MASK_LINK_DOWN (0x0002)
#define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@microchip.com>"
#define DRIVER_DESC "Microchip LAN87XX T1 PHY driver"
static int lan87xx_phy_config_intr(struct phy_device *phydev)
{
int rc, val = 0;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
/* unmask all source and clear them before enable */
rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, 0x7FFF);
rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
val = LAN87XX_MASK_LINK_UP | LAN87XX_MASK_LINK_DOWN;
}
rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val);
return rc < 0 ? rc : 0;
}
static int lan87xx_phy_ack_interrupt(struct phy_device *phydev)
{
int rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
return rc < 0 ? rc : 0;
}
static struct phy_driver microchip_t1_phy_driver[] = {
{
.phy_id = 0x0007c150,
.phy_id_mask = 0xfffffff0,
.name = "Microchip LAN87xx T1",
.features = SUPPORTED_100baseT_Full,
.flags = PHY_HAS_INTERRUPT,
.config_init = genphy_config_init,
.config_aneg = genphy_config_aneg,
.ack_interrupt = lan87xx_phy_ack_interrupt,
.config_intr = lan87xx_phy_config_intr,
.suspend = genphy_suspend,
.resume = genphy_resume,
}
};
module_phy_driver(microchip_t1_phy_driver);
static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
{ 0x0007c150, 0xfffffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, microchip_t1_tbl);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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