// SPDX-License-Identifier: GPL-2.0+/* * Driver for AMD am79c PHYs * * Author: Heiko Schocher <hs@denx.de> * * Copyright (c) 2011 DENX Software Engineering GmbH */#include <linux/kernel.h>#include <linux/errno.h>#include <linux/init.h>#include <linux/module.h>#include <linux/mii.h>#include <linux/phy.h> #define PHY_ID_AC101L		0x00225520#define PHY_ID_AM79C874		0x0022561b #define MII_AM79C_IR		17	/* Interrupt Status/Control Register */#define MII_AM79C_IR_EN_LINK	0x0400	/* IR enable Linkstate */#define MII_AM79C_IR_EN_ANEG	0x0100	/* IR enable Aneg Complete */#define MII_AM79C_IR_IMASK_INIT	(MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG) #define MII_AM79C_IR_LINK_DOWN	BIT(2)#define MII_AM79C_IR_ANEG_DONE	BIT(0)#define MII_AM79C_IR_IMASK_STAT	(MII_AM79C_IR_LINK_DOWN | MII_AM79C_IR_ANEG_DONE) MODULE_DESCRIPTION("AMD PHY driver");MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");MODULE_LICENSE("GPL"); static int am79c_ack_interrupt(struct phy_device *phydev){	int err; 	err = phy_read(phydev, MII_BMSR);	if (err < 0)		return err; 	err = phy_read(phydev, MII_AM79C_IR);	if (err < 0)		return err; 	return 0;} static int am79c_config_init(struct phy_device *phydev){	return 0;} static int am79c_config_intr(struct phy_device *phydev){	int err; 	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {		err = am79c_ack_interrupt(phydev);		if (err)			return err; 		err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);	} else {		err = phy_write(phydev, MII_AM79C_IR, 0);		if (err)			return err; 		err = am79c_ack_interrupt(phydev);	} 	return err;} static irqreturn_t am79c_handle_interrupt(struct phy_device *phydev){	int irq_status; 	irq_status = phy_read(phydev, MII_AM79C_IR);	if (irq_status < 0) {		phy_error(phydev);		return IRQ_NONE;	} 	if (!(irq_status & MII_AM79C_IR_IMASK_STAT))		return IRQ_NONE; 	phy_trigger_machine(phydev); 	return IRQ_HANDLED;} static struct phy_driver am79c_drivers[] = {	{		.phy_id		= PHY_ID_AM79C874,		.name		= "AM79C874",		.phy_id_mask	= 0xfffffff0,		/* PHY_BASIC_FEATURES */		.config_init	= am79c_config_init,		.config_intr	= am79c_config_intr,		.handle_interrupt = am79c_handle_interrupt,	},	{		.phy_id		= PHY_ID_AC101L,		.name		= "AC101L",		.phy_id_mask	= 0xfffffff0,		/* PHY_BASIC_FEATURES */		.config_init	= am79c_config_init,		.config_intr	= am79c_config_intr,		.handle_interrupt = am79c_handle_interrupt,	},}; module_phy_driver(am79c_drivers); static const struct mdio_device_id __maybe_unused amd_tbl[] = {	{ PHY_ID_AC101L, 0xfffffff0 },	{ PHY_ID_AM79C874, 0xfffffff0 },	{ }}; MODULE_DEVICE_TABLE(mdio, amd_tbl);