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 err = bcm_phy_ack_intr(phydev); 30 if (err) 31 return err; 32 33 reg &= ~MII_BCM63XX_IR_GMASK; 34 err = phy_write(phydev, MII_BCM63XX_IR, reg); 35 } else { 36 reg |= MII_BCM63XX_IR_GMASK; 37 err = phy_write(phydev, MII_BCM63XX_IR, reg); 38 if (err) 39 return err; 40 41 err = bcm_phy_ack_intr(phydev); 42 } 43 44 return err; 45 } 46 47 static int bcm63xx_config_init(struct phy_device *phydev) 48 { 49 int reg, err; 50 51 /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */ 52 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 53 54 reg = phy_read(phydev, MII_BCM63XX_IR); 55 if (reg < 0) 56 return reg; 57 58 /* Mask interrupts globally. */ 59 reg |= MII_BCM63XX_IR_GMASK; 60 err = phy_write(phydev, MII_BCM63XX_IR, reg); 61 if (err < 0) 62 return err; 63 64 /* Unmask events we are interested in */ 65 reg = ~(MII_BCM63XX_IR_DUPLEX | 66 MII_BCM63XX_IR_SPEED | 67 MII_BCM63XX_IR_LINK) | 68 MII_BCM63XX_IR_EN; 69 return phy_write(phydev, MII_BCM63XX_IR, reg); 70 } 71 72 static struct phy_driver bcm63xx_driver[] = { 73 { 74 .phy_id = 0x00406000, 75 .phy_id_mask = 0xfffffc00, 76 .name = "Broadcom BCM63XX (1)", 77 /* PHY_BASIC_FEATURES */ 78 .flags = PHY_IS_INTERNAL, 79 .config_init = bcm63xx_config_init, 80 .config_intr = bcm63xx_config_intr, 81 .handle_interrupt = bcm_phy_handle_interrupt, 82 }, { 83 /* same phy as above, with just a different OUI */ 84 .phy_id = 0x002bdc00, 85 .phy_id_mask = 0xfffffc00, 86 .name = "Broadcom BCM63XX (2)", 87 /* PHY_BASIC_FEATURES */ 88 .flags = PHY_IS_INTERNAL, 89 .config_init = bcm63xx_config_init, 90 .config_intr = bcm63xx_config_intr, 91 .handle_interrupt = bcm_phy_handle_interrupt, 92 } }; 93 94 module_phy_driver(bcm63xx_driver); 95 96 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = { 97 { 0x00406000, 0xfffffc00 }, 98 { 0x002bdc00, 0xfffffc00 }, 99 { } 100 }; 101 102 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl); 103