/* * drivers/net/phy/micrel.c * * Driver for Micrel PHYs * * Author: David J. Choi * * Copyright (c) 2010-2013 Micrel, Inc. * * 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. * * Support : Micrel Phys: * Giga phys: ksz9021, ksz9031 * 100/10 Phys : ksz8001, ksz8721, ksz8737, ksz8041 * ksz8021, ksz8031, ksz8051, * ksz8081, ksz8091, * ksz8061, * Switch : ksz8873, ksz886x */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/phy.h> #include <linux/micrel_phy.h> #include <linux/of.h> /* Operation Mode Strap Override */ #define MII_KSZPHY_OMSO 0x16 #define KSZPHY_OMSO_B_CAST_OFF (1 << 9) #define KSZPHY_OMSO_RMII_OVERRIDE (1 << 1) #define KSZPHY_OMSO_MII_OVERRIDE (1 << 0) /* general Interrupt control/status reg in vendor specific block. */ #define MII_KSZPHY_INTCS 0x1B #define KSZPHY_INTCS_JABBER (1 << 15) #define KSZPHY_INTCS_RECEIVE_ERR (1 << 14) #define KSZPHY_INTCS_PAGE_RECEIVE (1 << 13) #define KSZPHY_INTCS_PARELLEL (1 << 12) #define KSZPHY_INTCS_LINK_PARTNER_ACK (1 << 11) #define KSZPHY_INTCS_LINK_DOWN (1 << 10) #define KSZPHY_INTCS_REMOTE_FAULT (1 << 9) #define KSZPHY_INTCS_LINK_UP (1 << 8) #define KSZPHY_INTCS_ALL (KSZPHY_INTCS_LINK_UP |\ KSZPHY_INTCS_LINK_DOWN) /* general PHY control reg in vendor specific block. */ #define MII_KSZPHY_CTRL 0x1F /* bitmap of PHY register to set interrupt mode */ #define KSZPHY_CTRL_INT_ACTIVE_HIGH (1 << 9) #define KSZ9021_CTRL_INT_ACTIVE_HIGH (1 << 14) #define KS8737_CTRL_INT_ACTIVE_HIGH (1 << 14) #define KSZ8051_RMII_50MHZ_CLK (1 << 7) /* Write/read to/from extended registers */ #define MII_KSZPHY_EXTREG 0x0b #define KSZPHY_EXTREG_WRITE 0x8000 #define MII_KSZPHY_EXTREG_WRITE 0x0c #define MII_KSZPHY_EXTREG_READ 0x0d /* Extended registers */ #define MII_KSZPHY_CLK_CONTROL_PAD_SKEW 0x104 #define MII_KSZPHY_RX_DATA_PAD_SKEW 0x105 #define MII_KSZPHY_TX_DATA_PAD_SKEW 0x106 #define PS_TO_REG 200 static int ksz_config_flags(struct phy_device *phydev) { int regval; if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) { regval = phy_read(phydev, MII_KSZPHY_CTRL); regval |= KSZ8051_RMII_50MHZ_CLK; return phy_write(phydev, MII_KSZPHY_CTRL, regval); } return 0; } static int kszphy_extended_write(struct phy_device *phydev, u32 regnum, u16 val) { phy_write(phydev, MII_KSZPHY_EXTREG, KSZPHY_EXTREG_WRITE | regnum); return phy_write(phydev, MII_KSZPHY_EXTREG_WRITE, val); } static int kszphy_extended_read(struct phy_device *phydev, u32 regnum) { phy_write(phydev, MII_KSZPHY_EXTREG, regnum); return phy_read(phydev, MII_KSZPHY_EXTREG_READ); } static int kszphy_ack_interrupt(struct phy_device *phydev) { /* bit[7..0] int status, which is a read and clear register. */ int rc; rc = phy_read(phydev, MII_KSZPHY_INTCS); return (rc < 0) ? rc : 0; } static int kszphy_set_interrupt(struct phy_device *phydev) { int temp; temp = (PHY_INTERRUPT_ENABLED == phydev->interrupts) ? KSZPHY_INTCS_ALL : 0; return phy_write(phydev, MII_KSZPHY_INTCS, temp); } static int kszphy_config_intr(struct phy_device *phydev) { int temp, rc; /* set the interrupt pin active low */ temp = phy_read(phydev, MII_KSZPHY_CTRL); temp &= ~KSZPHY_CTRL_INT_ACTIVE_HIGH; phy_write(phydev, MII_KSZPHY_CTRL, temp); rc = kszphy_set_interrupt(phydev); return rc < 0 ? rc : 0; } static int ksz9021_config_intr(struct phy_device *phydev) { int temp, rc; /* set the interrupt pin active low */ temp = phy_read(phydev, MII_KSZPHY_CTRL); temp &= ~KSZ9021_CTRL_INT_ACTIVE_HIGH; phy_write(phydev, MII_KSZPHY_CTRL, temp); rc = kszphy_set_interrupt(phydev); return rc < 0 ? rc : 0; } static int ks8737_config_intr(struct phy_device *phydev) { int temp, rc; /* set the interrupt pin active low */ temp = phy_read(phydev, MII_KSZPHY_CTRL); temp &= ~KS8737_CTRL_INT_ACTIVE_HIGH; phy_write(phydev, MII_KSZPHY_CTRL, temp); rc = kszphy_set_interrupt(phydev); return rc < 0 ? rc : 0; } static int kszphy_config_init(struct phy_device *phydev) { return 0; } static int ksz8021_config_init(struct phy_device *phydev) { int rc; const u16 val = KSZPHY_OMSO_B_CAST_OFF | KSZPHY_OMSO_RMII_OVERRIDE; phy_write(phydev, MII_KSZPHY_OMSO, val); rc = ksz_config_flags(phydev); return rc < 0 ? rc : 0; } static int ks8051_config_init(struct phy_device *phydev) { int rc; rc = ksz_config_flags(phydev); return rc < 0 ? rc : 0; } static int ksz9021_load_values_from_of(struct phy_device *phydev, struct device_node *of_node, u16 reg, char *field1, char *field2, char *field3, char *field4) { int val1 = -1; int val2 = -2; int val3 = -3; int val4 = -4; int newval; int matches = 0; if (!of_property_read_u32(of_node, field1, &val1)) matches++; if (!of_property_read_u32(of_node, field2, &val2)) matches++; if (!of_property_read_u32(of_node, field3, &val3)) matches++; if (!of_property_read_u32(of_node, field4, &val4)) matches++; if (!matches) return 0; if (matches < 4) newval = kszphy_extended_read(phydev, reg); else newval = 0; if (val1 != -1) newval = ((newval & 0xfff0) | ((val1 / PS_TO_REG) & 0xf) << 0); if (val2 != -1) newval = ((newval & 0xff0f) | ((val2 / PS_TO_REG) & 0xf) << 4); if (val3 != -1) newval = ((newval & 0xf0ff) | ((val3 / PS_TO_REG) & 0xf) << 8); if (val4 != -1) newval = ((newval & 0x0fff) | ((val4 / PS_TO_REG) & 0xf) << 12); return kszphy_extended_write(phydev, reg, newval); } static int ksz9021_config_init(struct phy_device *phydev) { struct device *dev = &phydev->dev; struct device_node *of_node = dev->of_node; if (!of_node && dev->parent->of_node) of_node = dev->parent->of_node; if (of_node) { ksz9021_load_values_from_of(phydev, of_node, MII_KSZPHY_CLK_CONTROL_PAD_SKEW, "txen-skew-ps", "txc-skew-ps", "rxdv-skew-ps", "rxc-skew-ps"); ksz9021_load_values_from_of(phydev, of_node, MII_KSZPHY_RX_DATA_PAD_SKEW, "rxd0-skew-ps", "rxd1-skew-ps", "rxd2-skew-ps", "rxd3-skew-ps"); ksz9021_load_values_from_of(phydev, of_node, MII_KSZPHY_TX_DATA_PAD_SKEW, "txd0-skew-ps", "txd1-skew-ps", "txd2-skew-ps", "txd3-skew-ps"); } return 0; } #define KSZ8873MLL_GLOBAL_CONTROL_4 0x06 #define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX (1 << 6) #define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED (1 << 4) static int ksz8873mll_read_status(struct phy_device *phydev) { int regval; /* dummy read */ regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4); regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4); if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX) phydev->duplex = DUPLEX_HALF; else phydev->duplex = DUPLEX_FULL; if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_SPEED) phydev->speed = SPEED_10; else phydev->speed = SPEED_100; phydev->link = 1; phydev->pause = phydev->asym_pause = 0; return 0; } static int ksz8873mll_config_aneg(struct phy_device *phydev) { return 0; } static struct phy_driver ksphy_driver[] = { { .phy_id = PHY_ID_KS8737, .phy_id_mask = 0x00fffff0, .name = "Micrel KS8737", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = kszphy_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = ks8737_config_intr, .driver = { .owner = THIS_MODULE,}, }, { .phy_id = PHY_ID_KSZ8021, .phy_id_mask = 0x00ffffff, .name = "Micrel KSZ8021 or KSZ8031", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = ksz8021_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = kszphy_config_intr, .driver = { .owner = THIS_MODULE,}, }, { .phy_id = PHY_ID_KSZ8031, .phy_id_mask = 0x00ffffff, .name = "Micrel KSZ8031", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = ksz8021_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = kszphy_config_intr, .driver = { .owner = THIS_MODULE,}, }, { .phy_id = PHY_ID_KSZ8041, .phy_id_mask = 0x00fffff0, .name = "Micrel KSZ8041", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = kszphy_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = kszphy_config_intr, .driver = { .owner = THIS_MODULE,}, }, { .phy_id = PHY_ID_KSZ8051, .phy_id_mask = 0x00fffff0, .name = "Micrel KSZ8051", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = ks8051_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = kszphy_config_intr, .driver = { .owner = THIS_MODULE,}, }, { .phy_id = PHY_ID_KSZ8001, .name = "Micrel KSZ8001 or KS8721", .phy_id_mask = 0x00ffffff, .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = kszphy_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = kszphy_config_intr, .driver = { .owner = THIS_MODULE,}, }, { .phy_id = PHY_ID_KSZ8081, .name = "Micrel KSZ8081 or KSZ8091", .phy_id_mask = 0x00fffff0, .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = kszphy_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = kszphy_config_intr, .driver = { .owner = THIS_MODULE,}, }, { .phy_id = PHY_ID_KSZ8061, .name = "Micrel KSZ8061", .phy_id_mask = 0x00fffff0, .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = kszphy_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = kszphy_config_intr, .driver = { .owner = THIS_MODULE,}, }, { .phy_id = PHY_ID_KSZ9021, .phy_id_mask = 0x000ffffe, .name = "Micrel KSZ9021 Gigabit PHY", .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = ksz9021_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = ksz9021_config_intr, .driver = { .owner = THIS_MODULE, }, }, { .phy_id = PHY_ID_KSZ9031, .phy_id_mask = 0x00fffff0, .name = "Micrel KSZ9031 Gigabit PHY", .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = kszphy_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = ksz9021_config_intr, .driver = { .owner = THIS_MODULE, }, }, { .phy_id = PHY_ID_KSZ8873MLL, .phy_id_mask = 0x00fffff0, .name = "Micrel KSZ8873MLL Switch", .features = (SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_MAGICANEG, .config_init = kszphy_config_init, .config_aneg = ksz8873mll_config_aneg, .read_status = ksz8873mll_read_status, .driver = { .owner = THIS_MODULE, }, }, { .phy_id = PHY_ID_KSZ886X, .phy_id_mask = 0x00fffff0, .name = "Micrel KSZ886X Switch", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .config_init = kszphy_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .driver = { .owner = THIS_MODULE, }, } }; static int __init ksphy_init(void) { return phy_drivers_register(ksphy_driver, ARRAY_SIZE(ksphy_driver)); } static void __exit ksphy_exit(void) { phy_drivers_unregister(ksphy_driver, ARRAY_SIZE(ksphy_driver)); } module_init(ksphy_init); module_exit(ksphy_exit); MODULE_DESCRIPTION("Micrel PHY driver"); MODULE_AUTHOR("David J. Choi"); MODULE_LICENSE("GPL"); static struct mdio_device_id __maybe_unused micrel_tbl[] = { { PHY_ID_KSZ9021, 0x000ffffe }, { PHY_ID_KSZ9031, 0x00fffff0 }, { PHY_ID_KSZ8001, 0x00ffffff }, { PHY_ID_KS8737, 0x00fffff0 }, { PHY_ID_KSZ8021, 0x00ffffff }, { PHY_ID_KSZ8031, 0x00ffffff }, { PHY_ID_KSZ8041, 0x00fffff0 }, { PHY_ID_KSZ8051, 0x00fffff0 }, { PHY_ID_KSZ8061, 0x00fffff0 }, { PHY_ID_KSZ8081, 0x00fffff0 }, { PHY_ID_KSZ8873MLL, 0x00fffff0 }, { PHY_ID_KSZ886X, 0x00fffff0 }, { } }; MODULE_DEVICE_TABLE(mdio, micrel_tbl);