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/* SPDX-License-Identifier: GPL-2.0-only / / * linux/mdio.h: definitions for MDIO (clause 45) transceivers * Copyright 2006-2009 Solarflare Communications Inc. / #ifndef __LINUX_MDIO_H__ #define __LINUX_MDIO_H__ #include <uapi/linux/mdio.h> #include <linux/mod_devicetable.h> struct gpio_desc; struct mii_bus; / Multiple levels of nesting are possible. However typically this is * limited to nested DSA like layer, a MUX layer, and the normal * user. Instead of trying to handle the general case, just define * these cases. / enum mdio_mutex_lock_class { MDIO_MUTEX_NORMAL, MDIO_MUTEX_MUX, MDIO_MUTEX_NESTED, }; struct mdio_device { struct device dev; struct mii_bus bus; char modalias[MDIO_NAME_SIZE]; int (bus_match)(struct device dev, struct device_driver drv); void (device_free)(struct mdio_device mdiodev); void (device_remove)(struct mdio_device mdiodev); / Bus address of the MDIO device (0-31) / int addr; int flags; struct gpio_desc reset_gpio; struct reset_control reset_ctrl; unsigned int reset_assert_delay; unsigned int reset_deassert_delay; }; #define to_mdio_device(d) container_of(d, struct mdio_device, dev) / struct mdio_driver_common: Common to all MDIO drivers / struct mdio_driver_common { struct device_driver driver; int flags; }; #define MDIO_DEVICE_FLAG_PHY 1 #define to_mdio_common_driver(d) \ container_of(d, struct mdio_driver_common, driver) / struct mdio_driver: Generic MDIO driver / struct mdio_driver { struct mdio_driver_common mdiodrv; / * Called during discovery. Used to set * up device-specific structures, if any / int (probe)(struct mdio_device mdiodev); / Clears up any memory if needed / void (remove)(struct mdio_device mdiodev); / Quiesces the device on system shutdown, turns off interrupts etc / void (shutdown)(struct mdio_device mdiodev); }; #define to_mdio_driver(d) \ container_of(to_mdio_common_driver(d), struct mdio_driver, mdiodrv) / device driver data / static inline void mdiodev_set_drvdata(struct mdio_device mdio, void data) { dev_set_drvdata(&mdio->dev, data); } static inline void mdiodev_get_drvdata(struct mdio_device mdio) { return dev_get_drvdata(&mdio->dev); } void mdio_device_free(struct mdio_device mdiodev); struct mdio_device mdio_device_create(struct mii_bus bus, int addr); int mdio_device_register(struct mdio_device mdiodev); void mdio_device_remove(struct mdio_device mdiodev); void mdio_device_reset(struct mdio_device mdiodev, int value); int mdio_driver_register(struct mdio_driver drv); void mdio_driver_unregister(struct mdio_driver drv); int mdio_device_bus_match(struct device dev, struct device_driver drv); static inline bool mdio_phy_id_is_c45(int phy_id) { return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK); } static inline __u16 mdio_phy_id_prtad(int phy_id) { return (phy_id & MDIO_PHY_ID_PRTAD) >> 5; } static inline __u16 mdio_phy_id_devad(int phy_id) { return phy_id & MDIO_PHY_ID_DEVAD; } /* * struct mdio_if_info - Ethernet controller MDIO interface * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown) * @mmds: Mask of MMDs expected to be present in the PHY. This must be * non-zero unless @prtad = %MDIO_PRTAD_NONE. * @mode_support: MDIO modes supported. If %MDIO_SUPPORTS_C22 is set then * MII register access will be passed through with @devad = * %MDIO_DEVAD_NONE. If %MDIO_EMULATE_C22 is set then access to * commonly used clause 22 registers will be translated into * clause 45 registers. * @dev: Net device structure * @mdio_read: Register read function; returns value or negative error code * @mdio_write: Register write function; returns 0 or negative error code / struct mdio_if_info { int prtad; u32 mmds; unsigned mode_support; struct net_device dev; int (mdio_read)(struct net_device dev, int prtad, int devad, u16 addr); int (mdio_write)(struct net_device dev, int prtad, int devad, u16 addr, u16 val); }; #define MDIO_PRTAD_NONE (-1) #define MDIO_DEVAD_NONE (-1) #define MDIO_SUPPORTS_C22 1 #define MDIO_SUPPORTS_C45 2 #define MDIO_EMULATE_C22 4 struct ethtool_cmd; struct ethtool_pauseparam; extern int mdio45_probe(struct mdio_if_info mdio, int prtad); extern int mdio_set_flag(const struct mdio_if_info mdio, int prtad, int devad, u16 addr, int mask, bool sense); extern int mdio45_links_ok(const struct mdio_if_info mdio, u32 mmds); extern int mdio45_nway_restart(const struct mdio_if_info mdio); extern void mdio45_ethtool_gset_npage(const struct mdio_if_info mdio, struct ethtool_cmd ecmd, u32 npage_adv, u32 npage_lpa); extern void mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info mdio, struct ethtool_link_ksettings cmd, u32 npage_adv, u32 npage_lpa); /** * mdio45_ethtool_gset - get settings for ETHTOOL_GSET * @mdio: MDIO interface * @ecmd: Ethtool request structure * * Since the CSRs for auto-negotiation using next pages are not fully * standardised, this function does not attempt to decode them. Use * mdio45_ethtool_gset_npage() to specify advertisement bits from next * pages. / static inline void mdio45_ethtool_gset(const struct mdio_if_info mdio, struct ethtool_cmd ecmd) { mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0); } /* * mdio45_ethtool_ksettings_get - get settings for ETHTOOL_GLINKSETTINGS * @mdio: MDIO interface * @cmd: Ethtool request structure * * Since the CSRs for auto-negotiation using next pages are not fully * standardised, this function does not attempt to decode them. Use * mdio45_ethtool_ksettings_get_npage() to specify advertisement bits * from next pages. / static inline void mdio45_ethtool_ksettings_get(const struct mdio_if_info mdio, struct ethtool_link_ksettings cmd) { mdio45_ethtool_ksettings_get_npage(mdio, cmd, 0, 0); } extern int mdio_mii_ioctl(const struct mdio_if_info mdio, struct mii_ioctl_data mii_data, int cmd); /* * mmd_eee_cap_to_ethtool_sup_t * @eee_cap: value of the MMD EEE Capability register * * A small helper function that translates MMD EEE Capability (3.20) bits * to ethtool supported settings. / static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap) { u32 supported = 0; if (eee_cap & MDIO_EEE_100TX) supported \|= SUPPORTED_100baseT_Full; if (eee_cap & MDIO_EEE_1000T) supported \|= SUPPORTED_1000baseT_Full; if (eee_cap & MDIO_EEE_10GT) supported \|= SUPPORTED_10000baseT_Full; if (eee_cap & MDIO_EEE_1000KX) supported \|= SUPPORTED_1000baseKX_Full; if (eee_cap & MDIO_EEE_10GKX4) supported \|= SUPPORTED_10000baseKX4_Full; if (eee_cap & MDIO_EEE_10GKR) supported \|= SUPPORTED_10000baseKR_Full; return supported; } /* * mmd_eee_adv_to_ethtool_adv_t * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers * * A small helper function that translates the MMD EEE Advertisment (7.60) * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement * settings. / static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv) { u32 adv = 0; if (eee_adv & MDIO_EEE_100TX) adv \|= ADVERTISED_100baseT_Full; if (eee_adv & MDIO_EEE_1000T) adv \|= ADVERTISED_1000baseT_Full; if (eee_adv & MDIO_EEE_10GT) adv \|= ADVERTISED_10000baseT_Full; if (eee_adv & MDIO_EEE_1000KX) adv \|= ADVERTISED_1000baseKX_Full; if (eee_adv & MDIO_EEE_10GKX4) adv \|= ADVERTISED_10000baseKX4_Full; if (eee_adv & MDIO_EEE_10GKR) adv \|= ADVERTISED_10000baseKR_Full; return adv; } /* * ethtool_adv_to_mmd_eee_adv_t * @adv: the ethtool advertisement settings * * A small helper function that translates ethtool advertisement settings * to EEE advertisements for the MMD EEE Advertisement (7.60) and * MMD EEE Link Partner Ability (7.61) registers. / static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv) { u16 reg = 0; if (adv & ADVERTISED_100baseT_Full) reg \|= MDIO_EEE_100TX; if (adv & ADVERTISED_1000baseT_Full) reg \|= MDIO_EEE_1000T; if (adv & ADVERTISED_10000baseT_Full) reg \|= MDIO_EEE_10GT; if (adv & ADVERTISED_1000baseKX_Full) reg \|= MDIO_EEE_1000KX; if (adv & ADVERTISED_10000baseKX4_Full) reg \|= MDIO_EEE_10GKX4; if (adv & ADVERTISED_10000baseKR_Full) reg \|= MDIO_EEE_10GKR; return reg; } /* * linkmode_adv_to_mii_10gbt_adv_t * @advertising: the linkmode advertisement settings * * A small helper function that translates linkmode advertisement * settings to phy autonegotiation advertisements for the C45 * 10GBASE-T AN CONTROL (7.32) register. / static inline u32 linkmode_adv_to_mii_10gbt_adv_t(unsigned long advertising) { u32 result = 0; if (linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, advertising)) result \|= MDIO_AN_10GBT_CTRL_ADV2_5G; if (linkmode_test_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, advertising)) result \|= MDIO_AN_10GBT_CTRL_ADV5G; if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, advertising)) result \|= MDIO_AN_10GBT_CTRL_ADV10G; return result; } /** * mii_10gbt_stat_mod_linkmode_lpa_t * @advertising: target the linkmode advertisement settings * @adv: value of the C45 10GBASE-T AN STATUS register * * A small helper function that translates C45 10GBASE-T AN STATUS register bits * to linkmode advertisement settings. Other bits in advertising aren't changed. / static inline void mii_10gbt_stat_mod_linkmode_lpa_t(unsigned long advertising, u32 lpa) { linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, advertising, lpa & MDIO_AN_10GBT_STAT_LP2_5G); linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, advertising, lpa & MDIO_AN_10GBT_STAT_LP5G); linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, advertising, lpa & MDIO_AN_10GBT_STAT_LP10G); } int __mdiobus_read(struct mii_bus bus, int addr, u32 regnum); int __mdiobus_write(struct mii_bus bus, int addr, u32 regnum, u16 val); int mdiobus_read(struct mii_bus bus, int addr, u32 regnum); int mdiobus_read_nested(struct mii_bus bus, int addr, u32 regnum); int mdiobus_write(struct mii_bus bus, int addr, u32 regnum, u16 val); int mdiobus_write_nested(struct mii_bus bus, int addr, u32 regnum, u16 val); int mdiobus_register_device(struct mdio_device mdiodev); int mdiobus_unregister_device(struct mdio_device mdiodev); bool mdiobus_is_registered_device(struct mii_bus bus, int addr); struct phy_device mdiobus_get_phy(struct mii_bus bus, int addr); /* * mdio_module_driver() - Helper macro for registering mdio drivers * * Helper macro for MDIO drivers which do not do anything special in module * init/exit. Each module may only use this macro once, and calling it * replaces module_init() and module_exit(). / #define mdio_module_driver(_mdio_driver) \ static int __init mdio_module_init(void) \ { \ return mdio_driver_register(&_mdio_driver); \ } \ module_init(mdio_module_init); \ static void __exit mdio_module_exit(void) \ { \ mdio_driver_unregister(&_mdio_driver); \ } \ module_exit(mdio_module_exit) #endif / __LINUX_MDIO_H__ */

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