1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for Broadcom 63xx SOCs integrated PHYs 4 */ 5 #include "bcm-phy-lib.h" 6 #include <linux/module.h> 7 #include <linux/phy.h> 8 9 #define MII_BCM63XX_IR 0x1a /* interrupt register */ 10 #define MII_BCM63XX_IR_EN 0x4000 /* global interrupt enable */ 11 #define MII_BCM63XX_IR_DUPLEX 0x0800 /* duplex changed */ 12 #define MII_BCM63XX_IR_SPEED 0x0400 /* speed changed */ 13 #define MII_BCM63XX_IR_LINK 0x0200 /* link changed */ 14 #define MII_BCM63XX_IR_GMASK 0x0100 /* global interrupt mask */ 15 16 MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver"); 17 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>"); 18 MODULE_LICENSE("GPL"); 19 20 static int bcm63xx_config_intr(struct phy_device *phydev) 21 { 22 int reg, err; 23 24 reg = phy_read(phydev, MII_BCM63XX_IR); 25 if (reg < 0) 26 return reg; 27 28 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 29 reg &= ~MII_BCM63XX_IR_GMASK; 30 else 31 reg |= MII_BCM63XX_IR_GMASK; 32 33 err = phy_write(phydev, MII_BCM63XX_IR, reg); 34 return err; 35 } 36 37 static int bcm63xx_config_init(struct phy_device *phydev) 38 { 39 int reg, err; 40 41 /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */ 42 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 43 44 reg = phy_read(phydev, MII_BCM63XX_IR); 45 if (reg < 0) 46 return reg; 47 48 /* Mask interrupts globally. */ 49 reg |= MII_BCM63XX_IR_GMASK; 50 err = phy_write(phydev, MII_BCM63XX_IR, reg); 51 if (err < 0) 52 return err; 53 54 /* Unmask events we are interested in */ 55 reg = ~(MII_BCM63XX_IR_DUPLEX | 56 MII_BCM63XX_IR_SPEED | 57 MII_BCM63XX_IR_LINK) | 58 MII_BCM63XX_IR_EN; 59 return phy_write(phydev, MII_BCM63XX_IR, reg); 60 } 61 62 static struct phy_driver bcm63xx_driver[] = { 63 { 64 .phy_id = 0x00406000, 65 .phy_id_mask = 0xfffffc00, 66 .name = "Broadcom BCM63XX (1)", 67 /* PHY_BASIC_FEATURES */ 68 .flags = PHY_IS_INTERNAL, 69 .config_init = bcm63xx_config_init, 70 .ack_interrupt = bcm_phy_ack_intr, 71 .config_intr = bcm63xx_config_intr, 72 }, { 73 /* same phy as above, with just a different OUI */ 74 .phy_id = 0x002bdc00, 75 .phy_id_mask = 0xfffffc00, 76 /* PHY_BASIC_FEATURES */ 77 .flags = PHY_IS_INTERNAL, 78 .config_init = bcm63xx_config_init, 79 .ack_interrupt = bcm_phy_ack_intr, 80 .config_intr = bcm63xx_config_intr, 81 } }; 82 83 module_phy_driver(bcm63xx_driver); 84 85 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = { 86 { 0x00406000, 0xfffffc00 }, 87 { 0x002bdc00, 0xfffffc00 }, 88 { } 89 }; 90 91 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl); 92