// SPDX-License-Identifier: GPL-2.0 /* * Microchip switch driver main logic * * Copyright (C) 2017-2019 Microchip Technology Inc. */ #include <linux/delay.h> #include <linux/dsa/ksz_common.h> #include <linux/export.h> #include <linux/gpio/consumer.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_data/microchip-ksz.h> #include <linux/phy.h> #include <linux/etherdevice.h> #include <linux/if_bridge.h> #include <linux/if_vlan.h> #include <linux/if_hsr.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/of.h> #include <linux/of_mdio.h> #include <linux/of_net.h> #include <linux/micrel_phy.h> #include <net/dsa.h> #include <net/ieee8021q.h> #include <net/pkt_cls.h> #include <net/switchdev.h> #include "ksz_common.h" #include "ksz_dcb.h" #include "ksz_ptp.h" #include "ksz8.h" #include "ksz9477.h" #include "lan937x.h" #define MIB_COUNTER_NUM … struct ksz_stats_raw { … }; struct ksz88xx_stats_raw { … }; static const struct ksz_mib_names ksz88xx_mib_names[] = …; static const struct ksz_mib_names ksz9477_mib_names[] = …; struct ksz_driver_strength_prop { … }; enum ksz_driver_strength_type { … }; /** * struct ksz_drive_strength - drive strength mapping * @reg_val: register value * @microamp: microamp value */ struct ksz_drive_strength { … }; /* ksz9477_drive_strengths - Drive strength mapping for KSZ9477 variants * * This values are not documented in KSZ9477 variants but confirmed by * Microchip that KSZ9477, KSZ9567, KSZ8567, KSZ9897, KSZ9896, KSZ9563, KSZ9893 * and KSZ8563 are using same register (drive strength) settings like KSZ8795. * * Documentation in KSZ8795CLX provides more information with some * recommendations: * - for high speed signals * 1. 4 mA or 8 mA is often used for MII, RMII, and SPI interface with using * 2.5V or 3.3V VDDIO. * 2. 12 mA or 16 mA is often used for MII, RMII, and SPI interface with * using 1.8V VDDIO. * 3. 20 mA or 24 mA is often used for GMII/RGMII interface with using 2.5V * or 3.3V VDDIO. * 4. 28 mA is often used for GMII/RGMII interface with using 1.8V VDDIO. * 5. In same interface, the heavy loading should use higher one of the * drive current strength. * - for low speed signals * 1. 3.3V VDDIO, use either 4 mA or 8 mA. * 2. 2.5V VDDIO, use either 8 mA or 12 mA. * 3. 1.8V VDDIO, use either 12 mA or 16 mA. * 4. If it is heavy loading, can use higher drive current strength. */ static const struct ksz_drive_strength ksz9477_drive_strengths[] = …; /* ksz8830_drive_strengths - Drive strength mapping for KSZ8830, KSZ8873, .. * variants. * This values are documented in KSZ8873 and KSZ8863 datasheets. */ static const struct ksz_drive_strength ksz8830_drive_strengths[] = …; static void ksz8830_phylink_mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state); static void ksz_phylink_mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state); static void ksz_phylink_mac_link_down(struct phylink_config *config, unsigned int mode, phy_interface_t interface); static const struct phylink_mac_ops ksz8830_phylink_mac_ops = …; static const struct phylink_mac_ops ksz8_phylink_mac_ops = …; static const struct ksz_dev_ops ksz8_dev_ops = …; static void ksz9477_phylink_mac_link_up(struct phylink_config *config, struct phy_device *phydev, unsigned int mode, phy_interface_t interface, int speed, int duplex, bool tx_pause, bool rx_pause); static const struct phylink_mac_ops ksz9477_phylink_mac_ops = …; static const struct ksz_dev_ops ksz9477_dev_ops = …; static const struct phylink_mac_ops lan937x_phylink_mac_ops = …; static const struct ksz_dev_ops lan937x_dev_ops = …; static const u16 ksz8795_regs[] = …; static const u32 ksz8795_masks[] = …; static const u8 ksz8795_xmii_ctrl0[] = …; static const u8 ksz8795_xmii_ctrl1[] = …; static const u8 ksz8795_shifts[] = …; static const u16 ksz8863_regs[] = …; static const u32 ksz8863_masks[] = …; static u8 ksz8863_shifts[] = …; static const u16 ksz9477_regs[] = …; static const u32 ksz9477_masks[] = …; static const u8 ksz9477_shifts[] = …; static const u8 ksz9477_xmii_ctrl0[] = …; static const u8 ksz9477_xmii_ctrl1[] = …; static const u32 lan937x_masks[] = …; static const u8 lan937x_shifts[] = …; static const struct regmap_range ksz8563_valid_regs[] = …; static const struct regmap_access_table ksz8563_register_set = …; static const struct regmap_range ksz9477_valid_regs[] = …; static const struct regmap_access_table ksz9477_register_set = …; static const struct regmap_range ksz9896_valid_regs[] = …; static const struct regmap_access_table ksz9896_register_set = …; static const struct regmap_range ksz8873_valid_regs[] = …; static const struct regmap_access_table ksz8873_register_set = …; const struct ksz_chip_data ksz_switch_chips[] = …; EXPORT_SYMBOL_GPL(…); static const struct ksz_chip_data *ksz_lookup_info(unsigned int prod_num) { … } static int ksz_check_device_id(struct ksz_device *dev) { … } static void ksz_phylink_get_caps(struct dsa_switch *ds, int port, struct phylink_config *config) { … } void ksz_r_mib_stats64(struct ksz_device *dev, int port) { … } void ksz88xx_r_mib_stats64(struct ksz_device *dev, int port) { … } static void ksz_get_stats64(struct dsa_switch *ds, int port, struct rtnl_link_stats64 *s) { … } static void ksz_get_pause_stats(struct dsa_switch *ds, int port, struct ethtool_pause_stats *pause_stats) { … } static void ksz_get_strings(struct dsa_switch *ds, int port, u32 stringset, uint8_t *buf) { … } /** * ksz_update_port_member - Adjust port forwarding rules based on STP state and * isolation settings. * @dev: A pointer to the struct ksz_device representing the device. * @port: The port number to adjust. * * This function dynamically adjusts the port membership configuration for a * specified port and other device ports, based on Spanning Tree Protocol (STP) * states and port isolation settings. Each port, including the CPU port, has a * membership register, represented as a bitfield, where each bit corresponds * to a port number. A set bit indicates permission to forward frames to that * port. This function iterates over all ports, updating the membership register * to reflect current forwarding permissions: * * 1. Forwards frames only to ports that are part of the same bridge group and * in the BR_STATE_FORWARDING state. * 2. Takes into account the isolation status of ports; ports in the * BR_STATE_FORWARDING state with BR_ISOLATED configuration will not forward * frames to each other, even if they are in the same bridge group. * 3. Ensures that the CPU port is included in the membership based on its * upstream port configuration, allowing for management and control traffic * to flow as required. */ static void ksz_update_port_member(struct ksz_device *dev, int port) { … } static int ksz_sw_mdio_read(struct mii_bus *bus, int addr, int regnum) { … } static int ksz_sw_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val) { … } static int ksz_irq_phy_setup(struct ksz_device *dev) { … } static void ksz_irq_phy_free(struct ksz_device *dev) { … } static int ksz_mdio_register(struct ksz_device *dev) { … } static void ksz_irq_mask(struct irq_data *d) { … } static void ksz_irq_unmask(struct irq_data *d) { … } static void ksz_irq_bus_lock(struct irq_data *d) { … } static void ksz_irq_bus_sync_unlock(struct irq_data *d) { … } static const struct irq_chip ksz_irq_chip = …; static int ksz_irq_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq) { … } static const struct irq_domain_ops ksz_irq_domain_ops = …; static void ksz_irq_free(struct ksz_irq *kirq) { … } static irqreturn_t ksz_irq_thread_fn(int irq, void *dev_id) { … } static int ksz_irq_common_setup(struct ksz_device *dev, struct ksz_irq *kirq) { … } static int ksz_girq_setup(struct ksz_device *dev) { … } static int ksz_pirq_setup(struct ksz_device *dev, u8 p) { … } static int ksz_parse_drive_strength(struct ksz_device *dev); static int ksz_setup(struct dsa_switch *ds) { … } static void ksz_teardown(struct dsa_switch *ds) { … } static void port_r_cnt(struct ksz_device *dev, int port) { … } static void ksz_mib_read_work(struct work_struct *work) { … } void ksz_init_mib_timer(struct ksz_device *dev) { … } static int ksz_phy_read16(struct dsa_switch *ds, int addr, int reg) { … } static int ksz_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val) { … } static u32 ksz_get_phy_flags(struct dsa_switch *ds, int port) { … } static void ksz_phylink_mac_link_down(struct phylink_config *config, unsigned int mode, phy_interface_t interface) { … } static int ksz_sset_count(struct dsa_switch *ds, int port, int sset) { … } static void ksz_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *buf) { … } static int ksz_port_bridge_join(struct dsa_switch *ds, int port, struct dsa_bridge bridge, bool *tx_fwd_offload, struct netlink_ext_ack *extack) { … } static void ksz_port_bridge_leave(struct dsa_switch *ds, int port, struct dsa_bridge bridge) { … } static void ksz_port_fast_age(struct dsa_switch *ds, int port) { … } static int ksz_set_ageing_time(struct dsa_switch *ds, unsigned int msecs) { … } static int ksz_port_fdb_add(struct dsa_switch *ds, int port, const unsigned char *addr, u16 vid, struct dsa_db db) { … } static int ksz_port_fdb_del(struct dsa_switch *ds, int port, const unsigned char *addr, u16 vid, struct dsa_db db) { … } static int ksz_port_fdb_dump(struct dsa_switch *ds, int port, dsa_fdb_dump_cb_t *cb, void *data) { … } static int ksz_port_mdb_add(struct dsa_switch *ds, int port, const struct switchdev_obj_port_mdb *mdb, struct dsa_db db) { … } static int ksz_port_mdb_del(struct dsa_switch *ds, int port, const struct switchdev_obj_port_mdb *mdb, struct dsa_db db) { … } static int ksz9477_set_default_prio_queue_mapping(struct ksz_device *dev, int port) { … } static int ksz_port_setup(struct dsa_switch *ds, int port) { … } void ksz_port_stp_state_set(struct dsa_switch *ds, int port, u8 state) { … } static void ksz_port_teardown(struct dsa_switch *ds, int port) { … } static int ksz_port_pre_bridge_flags(struct dsa_switch *ds, int port, struct switchdev_brport_flags flags, struct netlink_ext_ack *extack) { … } static int ksz_port_bridge_flags(struct dsa_switch *ds, int port, struct switchdev_brport_flags flags, struct netlink_ext_ack *extack) { … } static enum dsa_tag_protocol ksz_get_tag_protocol(struct dsa_switch *ds, int port, enum dsa_tag_protocol mp) { … } static int ksz_connect_tag_protocol(struct dsa_switch *ds, enum dsa_tag_protocol proto) { … } static int ksz_port_vlan_filtering(struct dsa_switch *ds, int port, bool flag, struct netlink_ext_ack *extack) { … } static int ksz_port_vlan_add(struct dsa_switch *ds, int port, const struct switchdev_obj_port_vlan *vlan, struct netlink_ext_ack *extack) { … } static int ksz_port_vlan_del(struct dsa_switch *ds, int port, const struct switchdev_obj_port_vlan *vlan) { … } static int ksz_port_mirror_add(struct dsa_switch *ds, int port, struct dsa_mall_mirror_tc_entry *mirror, bool ingress, struct netlink_ext_ack *extack) { … } static void ksz_port_mirror_del(struct dsa_switch *ds, int port, struct dsa_mall_mirror_tc_entry *mirror) { … } static int ksz_change_mtu(struct dsa_switch *ds, int port, int mtu) { … } static int ksz_max_mtu(struct dsa_switch *ds, int port) { … } static int ksz_validate_eee(struct dsa_switch *ds, int port) { … } static int ksz_get_mac_eee(struct dsa_switch *ds, int port, struct ethtool_keee *e) { … } static int ksz_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_keee *e) { … } static void ksz_set_xmii(struct ksz_device *dev, int port, phy_interface_t interface) { … } phy_interface_t ksz_get_xmii(struct ksz_device *dev, int port, bool gbit) { … } static void ksz8830_phylink_mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state) { … } static void ksz_phylink_mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state) { … } bool ksz_get_gbit(struct ksz_device *dev, int port) { … } static void ksz_set_gbit(struct ksz_device *dev, int port, bool gbit) { … } static void ksz_set_100_10mbit(struct ksz_device *dev, int port, int speed) { … } static void ksz_port_set_xmii_speed(struct ksz_device *dev, int port, int speed) { … } static void ksz_duplex_flowctrl(struct ksz_device *dev, int port, int duplex, bool tx_pause, bool rx_pause) { … } static void ksz9477_phylink_mac_link_up(struct phylink_config *config, struct phy_device *phydev, unsigned int mode, phy_interface_t interface, int speed, int duplex, bool tx_pause, bool rx_pause) { … } static int ksz_switch_detect(struct ksz_device *dev) { … } static int ksz_cls_flower_add(struct dsa_switch *ds, int port, struct flow_cls_offload *cls, bool ingress) { … } static int ksz_cls_flower_del(struct dsa_switch *ds, int port, struct flow_cls_offload *cls, bool ingress) { … } /* Bandwidth is calculated by idle slope/transmission speed. Then the Bandwidth * is converted to Hex-decimal using the successive multiplication method. On * every step, integer part is taken and decimal part is carry forwarded. */ static int cinc_cal(s32 idle_slope, s32 send_slope, u32 *bw) { … } static int ksz_setup_tc_mode(struct ksz_device *dev, int port, u8 scheduler, u8 shaper) { … } static int ksz_setup_tc_cbs(struct dsa_switch *ds, int port, struct tc_cbs_qopt_offload *qopt) { … } static int ksz_disable_egress_rate_limit(struct ksz_device *dev, int port) { … } static int ksz_ets_band_to_queue(struct tc_ets_qopt_offload_replace_params *p, int band) { … } static int ksz_queue_set_strict(struct ksz_device *dev, int port, int queue) { … } static int ksz_queue_set_wrr(struct ksz_device *dev, int port, int queue, int weight) { … } static int ksz_tc_ets_add(struct ksz_device *dev, int port, struct tc_ets_qopt_offload_replace_params *p) { … } static int ksz_tc_ets_del(struct ksz_device *dev, int port) { … } static int ksz_tc_ets_validate(struct ksz_device *dev, int port, struct tc_ets_qopt_offload_replace_params *p) { … } static int ksz_tc_setup_qdisc_ets(struct dsa_switch *ds, int port, struct tc_ets_qopt_offload *qopt) { … } static int ksz_setup_tc(struct dsa_switch *ds, int port, enum tc_setup_type type, void *type_data) { … } static void ksz_get_wol(struct dsa_switch *ds, int port, struct ethtool_wolinfo *wol) { … } static int ksz_set_wol(struct dsa_switch *ds, int port, struct ethtool_wolinfo *wol) { … } static int ksz_port_set_mac_address(struct dsa_switch *ds, int port, const unsigned char *addr) { … } /** * ksz_is_port_mac_global_usable - Check if the MAC address on a given port * can be used as a global address. * @ds: Pointer to the DSA switch structure. * @port: The port number on which the MAC address is to be checked. * * This function examines the MAC address set on the specified port and * determines if it can be used as a global address for the switch. * * Return: true if the port's MAC address can be used as a global address, false * otherwise. */ bool ksz_is_port_mac_global_usable(struct dsa_switch *ds, int port) { … } /** * ksz_switch_macaddr_get - Program the switch's MAC address register. * @ds: DSA switch instance. * @port: Port number. * @extack: Netlink extended acknowledgment. * * This function programs the switch's MAC address register with the MAC address * of the requesting user port. This single address is used by the switch for * multiple features like HSR self-address filtering and WoL. Other user ports * can share ownership of this address as long as their MAC address is the same. * The MAC addresses of user ports must not change while they have ownership of * the switch MAC address. * * Return: 0 on success, or other error codes on failure. */ int ksz_switch_macaddr_get(struct dsa_switch *ds, int port, struct netlink_ext_ack *extack) { … } void ksz_switch_macaddr_put(struct dsa_switch *ds) { … } static int ksz_hsr_join(struct dsa_switch *ds, int port, struct net_device *hsr, struct netlink_ext_ack *extack) { … } static int ksz_hsr_leave(struct dsa_switch *ds, int port, struct net_device *hsr) { … } static const struct dsa_switch_ops ksz_switch_ops = …; struct ksz_device *ksz_switch_alloc(struct device *base, void *priv) { … } EXPORT_SYMBOL(…); /** * ksz_switch_shutdown - Shutdown routine for the switch device. * @dev: The switch device structure. * * This function is responsible for initiating a shutdown sequence for the * switch device. It invokes the reset operation defined in the device * operations, if available, to reset the switch. Subsequently, it calls the * DSA framework's shutdown function to ensure a proper shutdown of the DSA * switch. */ void ksz_switch_shutdown(struct ksz_device *dev) { … } EXPORT_SYMBOL(…); static void ksz_parse_rgmii_delay(struct ksz_device *dev, int port_num, struct device_node *port_dn) { … } /** * ksz_drive_strength_to_reg() - Convert drive strength value to corresponding * register value. * @array: The array of drive strength values to search. * @array_size: The size of the array. * @microamp: The drive strength value in microamp to be converted. * * This function searches the array of drive strength values for the given * microamp value and returns the corresponding register value for that drive. * * Returns: If found, the corresponding register value for that drive strength * is returned. Otherwise, -EINVAL is returned indicating an invalid value. */ static int ksz_drive_strength_to_reg(const struct ksz_drive_strength *array, size_t array_size, int microamp) { … } /** * ksz_drive_strength_error() - Report invalid drive strength value * @dev: ksz device * @array: The array of drive strength values to search. * @array_size: The size of the array. * @microamp: Invalid drive strength value in microamp * * This function logs an error message when an unsupported drive strength value * is detected. It lists out all the supported drive strength values for * reference in the error message. */ static void ksz_drive_strength_error(struct ksz_device *dev, const struct ksz_drive_strength *array, size_t array_size, int microamp) { … } /** * ksz9477_drive_strength_write() - Set the drive strength for specific KSZ9477 * chip variants. * @dev: ksz device * @props: Array of drive strength properties to be applied * @num_props: Number of properties in the array * * This function configures the drive strength for various KSZ9477 chip variants * based on the provided properties. It handles chip-specific nuances and * ensures only valid drive strengths are written to the respective chip. * * Return: 0 on successful configuration, a negative error code on failure. */ static int ksz9477_drive_strength_write(struct ksz_device *dev, struct ksz_driver_strength_prop *props, int num_props) { … } /** * ksz8830_drive_strength_write() - Set the drive strength configuration for * KSZ8830 compatible chip variants. * @dev: ksz device * @props: Array of drive strength properties to be set * @num_props: Number of properties in the array * * This function applies the specified drive strength settings to KSZ8830 chip * variants (KSZ8873, KSZ8863). * It ensures the configurations align with what the chip variant supports and * warns or errors out on unsupported settings. * * Return: 0 on success, error code otherwise */ static int ksz8830_drive_strength_write(struct ksz_device *dev, struct ksz_driver_strength_prop *props, int num_props) { … } /** * ksz_parse_drive_strength() - Extract and apply drive strength configurations * from device tree properties. * @dev: ksz device * * This function reads the specified drive strength properties from the * device tree, validates against the supported chip variants, and sets * them accordingly. An error should be critical here, as the drive strength * settings are crucial for EMI compliance. * * Return: 0 on success, error code otherwise */ static int ksz_parse_drive_strength(struct ksz_device *dev) { … } int ksz_switch_register(struct ksz_device *dev) { … } EXPORT_SYMBOL(…); void ksz_switch_remove(struct ksz_device *dev) { … } EXPORT_SYMBOL(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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