/* * drivers/net/phy/broadcom.c * * Broadcom BCM5411, BCM5421 and BCM5461 Gigabit Ethernet * transceivers. * * Copyright (c) 2006 Maciej W. Rozycki * * Inspired by code written by Amy Fong. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/module.h> #include <linux/phy.h> #define MII_BCM54XX_ECR 0x10 /* BCM54xx extended control register */ #define MII_BCM54XX_ECR_IM 0x1000 /* Interrupt mask */ #define MII_BCM54XX_ECR_IF 0x0800 /* Interrupt force */ #define MII_BCM54XX_ESR 0x11 /* BCM54xx extended status register */ #define MII_BCM54XX_ESR_IS 0x1000 /* Interrupt status */ #define MII_BCM54XX_EXP_DATA 0x15 /* Expansion register data */ #define MII_BCM54XX_EXP_SEL 0x17 /* Expansion register select */ #define MII_BCM54XX_EXP_SEL_SSD 0x0e00 /* Secondary SerDes select */ #define MII_BCM54XX_EXP_SEL_ER 0x0f00 /* Expansion register select */ #define MII_BCM54XX_AUX_CTL 0x18 /* Auxiliary control register */ #define MII_BCM54XX_ISR 0x1a /* BCM54xx interrupt status register */ #define MII_BCM54XX_IMR 0x1b /* BCM54xx interrupt mask register */ #define MII_BCM54XX_INT_CRCERR 0x0001 /* CRC error */ #define MII_BCM54XX_INT_LINK 0x0002 /* Link status changed */ #define MII_BCM54XX_INT_SPEED 0x0004 /* Link speed change */ #define MII_BCM54XX_INT_DUPLEX 0x0008 /* Duplex mode changed */ #define MII_BCM54XX_INT_LRS 0x0010 /* Local receiver status changed */ #define MII_BCM54XX_INT_RRS 0x0020 /* Remote receiver status changed */ #define MII_BCM54XX_INT_SSERR 0x0040 /* Scrambler synchronization error */ #define MII_BCM54XX_INT_UHCD 0x0080 /* Unsupported HCD negotiated */ #define MII_BCM54XX_INT_NHCD 0x0100 /* No HCD */ #define MII_BCM54XX_INT_NHCDL 0x0200 /* No HCD link */ #define MII_BCM54XX_INT_ANPR 0x0400 /* Auto-negotiation page received */ #define MII_BCM54XX_INT_LC 0x0800 /* All counters below 128 */ #define MII_BCM54XX_INT_HC 0x1000 /* Counter above 32768 */ #define MII_BCM54XX_INT_MDIX 0x2000 /* MDIX status change */ #define MII_BCM54XX_INT_PSERR 0x4000 /* Pair swap error */ #define MII_BCM54XX_SHD 0x1c /* 0x1c shadow registers */ #define MII_BCM54XX_SHD_WRITE 0x8000 #define MII_BCM54XX_SHD_VAL(x) ((x & 0x1f) << 10) #define MII_BCM54XX_SHD_DATA(x) ((x & 0x3ff) << 0) /* * Broadcom LED source encodings. These are used in BCM5461, BCM5481, * BCM5482, and possibly some others. */ #define BCM_LED_SRC_LINKSPD1 0x0 #define BCM_LED_SRC_LINKSPD2 0x1 #define BCM_LED_SRC_XMITLED 0x2 #define BCM_LED_SRC_ACTIVITYLED 0x3 #define BCM_LED_SRC_FDXLED 0x4 #define BCM_LED_SRC_SLAVE 0x5 #define BCM_LED_SRC_INTR 0x6 #define BCM_LED_SRC_QUALITY 0x7 #define BCM_LED_SRC_RCVLED 0x8 #define BCM_LED_SRC_MULTICOLOR1 0xa #define BCM_LED_SRC_OPENSHORT 0xb #define BCM_LED_SRC_OFF 0xe /* Tied high */ #define BCM_LED_SRC_ON 0xf /* Tied low */ /* * BCM5482: Shadow registers * Shadow values go into bits [14:10] of register 0x1c to select a shadow * register to access. */ #define BCM5482_SHD_LEDS1 0x0d /* 01101: LED Selector 1 */ /* LED3 / ~LINKSPD[2] selector */ #define BCM5482_SHD_LEDS1_LED3(src) ((src & 0xf) << 4) /* LED1 / ~LINKSPD[1] selector */ #define BCM5482_SHD_LEDS1_LED1(src) ((src & 0xf) << 0) #define BCM5482_SHD_SSD 0x14 /* 10100: Secondary SerDes control */ #define BCM5482_SHD_SSD_LEDM 0x0008 /* SSD LED Mode enable */ #define BCM5482_SHD_SSD_EN 0x0001 /* SSD enable */ #define BCM5482_SHD_MODE 0x1f /* 11111: Mode Control Register */ #define BCM5482_SHD_MODE_1000BX 0x0001 /* Enable 1000BASE-X registers */ /* * BCM5482: Secondary SerDes registers */ #define BCM5482_SSD_1000BX_CTL 0x00 /* 1000BASE-X Control */ #define BCM5482_SSD_1000BX_CTL_PWRDOWN 0x0800 /* Power-down SSD */ #define BCM5482_SSD_SGMII_SLAVE 0x15 /* SGMII Slave Register */ #define BCM5482_SSD_SGMII_SLAVE_EN 0x0002 /* Slave mode enable */ #define BCM5482_SSD_SGMII_SLAVE_AD 0x0001 /* Slave auto-detection */ /* * Device flags for PHYs that can be configured for different operating * modes. */ #define PHY_BCM_FLAGS_VALID 0x80000000 #define PHY_BCM_FLAGS_INTF_XAUI 0x00000020 #define PHY_BCM_FLAGS_INTF_SGMII 0x00000010 #define PHY_BCM_FLAGS_MODE_1000BX 0x00000002 #define PHY_BCM_FLAGS_MODE_COPPER 0x00000001 MODULE_DESCRIPTION("Broadcom PHY driver"); MODULE_AUTHOR("Maciej W. Rozycki"); MODULE_LICENSE("GPL"); /* * Indirect register access functions for the 1000BASE-T/100BASE-TX/10BASE-T * 0x1c shadow registers. */ static int bcm54xx_shadow_read(struct phy_device *phydev, u16 shadow) { phy_write(phydev, MII_BCM54XX_SHD, MII_BCM54XX_SHD_VAL(shadow)); return MII_BCM54XX_SHD_DATA(phy_read(phydev, MII_BCM54XX_SHD)); } static int bcm54xx_shadow_write(struct phy_device *phydev, u16 shadow, u16 val) { return phy_write(phydev, MII_BCM54XX_SHD, MII_BCM54XX_SHD_WRITE | MII_BCM54XX_SHD_VAL(shadow) | MII_BCM54XX_SHD_DATA(val)); } /* * Indirect register access functions for the Expansion Registers * and Secondary SerDes registers (when sec_serdes=1). */ static int bcm54xx_exp_read(struct phy_device *phydev, int sec_serdes, u8 regnum) { int val; phy_write(phydev, MII_BCM54XX_EXP_SEL, (sec_serdes ? MII_BCM54XX_EXP_SEL_SSD : MII_BCM54XX_EXP_SEL_ER) | regnum); val = phy_read(phydev, MII_BCM54XX_EXP_DATA); phy_write(phydev, MII_BCM54XX_EXP_SEL, regnum); return val; } static int bcm54xx_exp_write(struct phy_device *phydev, int sec_serdes, u8 regnum, u16 val) { int ret; phy_write(phydev, MII_BCM54XX_EXP_SEL, (sec_serdes ? MII_BCM54XX_EXP_SEL_SSD : MII_BCM54XX_EXP_SEL_ER) | regnum); ret = phy_write(phydev, MII_BCM54XX_EXP_DATA, val); phy_write(phydev, MII_BCM54XX_EXP_SEL, regnum); return ret; } static int bcm54xx_config_init(struct phy_device *phydev) { int reg, err; reg = phy_read(phydev, MII_BCM54XX_ECR); if (reg < 0) return reg; /* Mask interrupts globally. */ reg |= MII_BCM54XX_ECR_IM; err = phy_write(phydev, MII_BCM54XX_ECR, reg); if (err < 0) return err; /* Unmask events we are interested in. */ reg = ~(MII_BCM54XX_INT_DUPLEX | MII_BCM54XX_INT_SPEED | MII_BCM54XX_INT_LINK); err = phy_write(phydev, MII_BCM54XX_IMR, reg); if (err < 0) return err; return 0; } static int bcm5482_config_init(struct phy_device *phydev) { int err, reg; err = bcm54xx_config_init(phydev); if (phydev->dev_flags & PHY_BCM_FLAGS_MODE_1000BX) { /* * Enable secondary SerDes and its use as an LED source */ reg = bcm54xx_shadow_read(phydev, BCM5482_SHD_SSD); bcm54xx_shadow_write(phydev, BCM5482_SHD_SSD, reg | BCM5482_SHD_SSD_LEDM | BCM5482_SHD_SSD_EN); /* * Enable SGMII slave mode and auto-detection */ reg = bcm54xx_exp_read(phydev, 1, BCM5482_SSD_SGMII_SLAVE); bcm54xx_exp_write(phydev, 1, BCM5482_SSD_SGMII_SLAVE, reg | BCM5482_SSD_SGMII_SLAVE_EN | BCM5482_SSD_SGMII_SLAVE_AD); /* * Disable secondary SerDes powerdown */ reg = bcm54xx_exp_read(phydev, 1, BCM5482_SSD_1000BX_CTL); bcm54xx_exp_write(phydev, 1, BCM5482_SSD_1000BX_CTL, reg & ~BCM5482_SSD_1000BX_CTL_PWRDOWN); /* * Select 1000BASE-X register set (primary SerDes) */ reg = bcm54xx_shadow_read(phydev, BCM5482_SHD_MODE); bcm54xx_shadow_write(phydev, BCM5482_SHD_MODE, reg | BCM5482_SHD_MODE_1000BX); /* * LED1=ACTIVITYLED, LED3=LINKSPD[2] * (Use LED1 as secondary SerDes ACTIVITY LED) */ bcm54xx_shadow_write(phydev, BCM5482_SHD_LEDS1, BCM5482_SHD_LEDS1_LED1(BCM_LED_SRC_ACTIVITYLED) | BCM5482_SHD_LEDS1_LED3(BCM_LED_SRC_LINKSPD2)); /* * Auto-negotiation doesn't seem to work quite right * in this mode, so we disable it and force it to the * right speed/duplex setting. Only 'link status' * is important. */ phydev->autoneg = AUTONEG_DISABLE; phydev->speed = SPEED_1000; phydev->duplex = DUPLEX_FULL; } return err; } static int bcm5482_read_status(struct phy_device *phydev) { int err; err = genphy_read_status(phydev); if (phydev->dev_flags & PHY_BCM_FLAGS_MODE_1000BX) { /* * Only link status matters for 1000Base-X mode, so force * 1000 Mbit/s full-duplex status */ if (phydev->link) { phydev->speed = SPEED_1000; phydev->duplex = DUPLEX_FULL; } } return err; } static int bcm54xx_ack_interrupt(struct phy_device *phydev) { int reg; /* Clear pending interrupts. */ reg = phy_read(phydev, MII_BCM54XX_ISR); if (reg < 0) return reg; return 0; } static int bcm54xx_config_intr(struct phy_device *phydev) { int reg, err; reg = phy_read(phydev, MII_BCM54XX_ECR); if (reg < 0) return reg; if (phydev->interrupts == PHY_INTERRUPT_ENABLED) reg &= ~MII_BCM54XX_ECR_IM; else reg |= MII_BCM54XX_ECR_IM; err = phy_write(phydev, MII_BCM54XX_ECR, reg); return err; } static int bcm5481_config_aneg(struct phy_device *phydev) { int ret; /* Aneg firsly. */ ret = genphy_config_aneg(phydev); /* Then we can set up the delay. */ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) { u16 reg; /* * There is no BCM5481 specification available, so down * here is everything we know about "register 0x18". This * at least helps BCM5481 to successfuly receive packets * on MPC8360E-RDK board. Peter Barada <peterb@logicpd.com> * says: "This sets delay between the RXD and RXC signals * instead of using trace lengths to achieve timing". */ /* Set RDX clk delay. */ reg = 0x7 | (0x7 << 12); phy_write(phydev, 0x18, reg); reg = phy_read(phydev, 0x18); /* Set RDX-RXC skew. */ reg |= (1 << 8); /* Write bits 14:0. */ reg |= (1 << 15); phy_write(phydev, 0x18, reg); } return ret; } static struct phy_driver bcm5411_driver = { .phy_id = 0x00206070, .phy_id_mask = 0xfffffff0, .name = "Broadcom BCM5411", .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = bcm54xx_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = bcm54xx_ack_interrupt, .config_intr = bcm54xx_config_intr, .driver = { .owner = THIS_MODULE }, }; static struct phy_driver bcm5421_driver = { .phy_id = 0x002060e0, .phy_id_mask = 0xfffffff0, .name = "Broadcom BCM5421", .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = bcm54xx_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = bcm54xx_ack_interrupt, .config_intr = bcm54xx_config_intr, .driver = { .owner = THIS_MODULE }, }; static struct phy_driver bcm5461_driver = { .phy_id = 0x002060c0, .phy_id_mask = 0xfffffff0, .name = "Broadcom BCM5461", .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = bcm54xx_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = bcm54xx_ack_interrupt, .config_intr = bcm54xx_config_intr, .driver = { .owner = THIS_MODULE }, }; static struct phy_driver bcm5464_driver = { .phy_id = 0x002060b0, .phy_id_mask = 0xfffffff0, .name = "Broadcom BCM5464", .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = bcm54xx_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = bcm54xx_ack_interrupt, .config_intr = bcm54xx_config_intr, .driver = { .owner = THIS_MODULE }, }; static struct phy_driver bcm5481_driver = { .phy_id = 0x0143bca0, .phy_id_mask = 0xfffffff0, .name = "Broadcom BCM5481", .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = bcm54xx_config_init, .config_aneg = bcm5481_config_aneg, .read_status = genphy_read_status, .ack_interrupt = bcm54xx_ack_interrupt, .config_intr = bcm54xx_config_intr, .driver = { .owner = THIS_MODULE }, }; static struct phy_driver bcm5482_driver = { .phy_id = 0x0143bcb0, .phy_id_mask = 0xfffffff0, .name = "Broadcom BCM5482", .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = bcm5482_config_init, .config_aneg = genphy_config_aneg, .read_status = bcm5482_read_status, .ack_interrupt = bcm54xx_ack_interrupt, .config_intr = bcm54xx_config_intr, .driver = { .owner = THIS_MODULE }, }; static int __init broadcom_init(void) { int ret; ret = phy_driver_register(&bcm5411_driver); if (ret) goto out_5411; ret = phy_driver_register(&bcm5421_driver); if (ret) goto out_5421; ret = phy_driver_register(&bcm5461_driver); if (ret) goto out_5461; ret = phy_driver_register(&bcm5464_driver); if (ret) goto out_5464; ret = phy_driver_register(&bcm5481_driver); if (ret) goto out_5481; ret = phy_driver_register(&bcm5482_driver); if (ret) goto out_5482; return ret; out_5482: phy_driver_unregister(&bcm5481_driver); out_5481: phy_driver_unregister(&bcm5464_driver); out_5464: phy_driver_unregister(&bcm5461_driver); out_5461: phy_driver_unregister(&bcm5421_driver); out_5421: phy_driver_unregister(&bcm5411_driver); out_5411: return ret; } static void __exit broadcom_exit(void) { phy_driver_unregister(&bcm5482_driver); phy_driver_unregister(&bcm5481_driver); phy_driver_unregister(&bcm5464_driver); phy_driver_unregister(&bcm5461_driver); phy_driver_unregister(&bcm5421_driver); phy_driver_unregister(&bcm5411_driver); } module_init(broadcom_init); module_exit(broadcom_exit);