text: // SPDX-License-Identifier: GPL-2.0+
  /*
   *	Driver for Broadcom 63xx SOCs integrated PHYs
   */
  #include "bcm-phy-lib.h"
  #include <linux/module.h>
  #include <linux/phy.h>
  
  #define MII_BCM63XX_IR		0x1a	/* interrupt register */
  #define MII_BCM63XX_IR_EN	0x4000	/* global interrupt enable */
  #define MII_BCM63XX_IR_DUPLEX	0x0800	/* duplex changed */
  #define MII_BCM63XX_IR_SPEED	0x0400	/* speed changed */
  #define MII_BCM63XX_IR_LINK	0x0200	/* link changed */
  #define MII_BCM63XX_IR_GMASK	0x0100	/* global interrupt mask */
  
  MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
  MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
  MODULE_LICENSE("GPL");
  
  static int bcm63xx_config_intr(struct phy_device *phydev)
  {
  	int reg, err;
  
  	reg = phy_read(phydev, MII_BCM63XX_IR);
  	if (reg < 0)
  		return reg;
  
  	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  		reg &= ~MII_BCM63XX_IR_GMASK;
  	else
  		reg |= MII_BCM63XX_IR_GMASK;
  
  	err = phy_write(phydev, MII_BCM63XX_IR, reg);
  	return err;
  }
  
  static int bcm63xx_config_init(struct phy_device *phydev)
  {
  	int reg, err;
  
  	/* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
  	linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
  
  	reg = phy_read(phydev, MII_BCM63XX_IR);
  	if (reg < 0)
  		return reg;
  
  	/* Mask interrupts globally.  */
  	reg |= MII_BCM63XX_IR_GMASK;
  	err = phy_write(phydev, MII_BCM63XX_IR, reg);
  	if (err < 0)
  		return err;
  
  	/* Unmask events we are interested in  */
  	reg = ~(MII_BCM63XX_IR_DUPLEX |
  		MII_BCM63XX_IR_SPEED |
  		MII_BCM63XX_IR_LINK) |
  		MII_BCM63XX_IR_EN;
  	return phy_write(phydev, MII_BCM63XX_IR, reg);
  }
  
  static struct phy_driver bcm63xx_driver[] = {
  {
  	.phy_id		= 0x00406000,
  	.phy_id_mask	= 0xfffffc00,
  	.name		= "Broadcom BCM63XX (1)",
  	.features	= PHY_BASIC_FEATURES,
  	.flags		= PHY_IS_INTERNAL,
  	.config_init	= bcm63xx_config_init,
  	.ack_interrupt	= bcm_phy_ack_intr,
  	.config_intr	= bcm63xx_config_intr,
  }, {
  	/* same phy as above, with just a different OUI */
  	.phy_id		= 0x002bdc00,
  	.phy_id_mask	= 0xfffffc00,
  	.features	= PHY_BASIC_FEATURES,
  	.flags		= PHY_IS_INTERNAL,
  	.config_init	= bcm63xx_config_init,
  	.ack_interrupt	= bcm_phy_ack_intr,
  	.config_intr	= bcm63xx_config_intr,
  } };
  
  module_phy_driver(bcm63xx_driver);
  
  static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
  	{ 0x00406000, 0xfffffc00 },
  	{ 0x002bdc00, 0xfffffc00 },
  	{ }
  };
  
  MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);
  