1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 27ce236faSRuslan Babayev #include <linux/acpi.h> 31323061aSAndrew Lunn #include <linux/ctype.h> 49cc8976cSRussell King #include <linux/debugfs.h> 573970055SRussell King #include <linux/delay.h> 654a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 71323061aSAndrew Lunn #include <linux/hwmon.h> 873970055SRussell King #include <linux/i2c.h> 973970055SRussell King #include <linux/interrupt.h> 1073970055SRussell King #include <linux/jiffies.h> 11fcba68bdSAndrew Lunn #include <linux/mdio/mdio-i2c.h> 1273970055SRussell King #include <linux/module.h> 1373970055SRussell King #include <linux/mutex.h> 1473970055SRussell King #include <linux/of.h> 1573970055SRussell King #include <linux/phy.h> 1673970055SRussell King #include <linux/platform_device.h> 1773970055SRussell King #include <linux/rtnetlink.h> 1873970055SRussell King #include <linux/slab.h> 1973970055SRussell King #include <linux/workqueue.h> 2073970055SRussell King 2173970055SRussell King #include "sfp.h" 2273970055SRussell King #include "swphy.h" 2373970055SRussell King 2473970055SRussell King enum { 2573970055SRussell King GPIO_MODDEF0, 2673970055SRussell King GPIO_LOS, 2773970055SRussell King GPIO_TX_FAULT, 2873970055SRussell King GPIO_TX_DISABLE, 2973970055SRussell King GPIO_RATE_SELECT, 3073970055SRussell King GPIO_MAX, 3173970055SRussell King 3273970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3373970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3473970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3573970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3673970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3773970055SRussell King 3873970055SRussell King SFP_E_INSERT = 0, 3973970055SRussell King SFP_E_REMOVE, 406b0da5c9SRussell King SFP_E_DEV_ATTACH, 416b0da5c9SRussell King SFP_E_DEV_DETACH, 4273970055SRussell King SFP_E_DEV_DOWN, 4373970055SRussell King SFP_E_DEV_UP, 4473970055SRussell King SFP_E_TX_FAULT, 4573970055SRussell King SFP_E_TX_CLEAR, 4673970055SRussell King SFP_E_LOS_HIGH, 4773970055SRussell King SFP_E_LOS_LOW, 4873970055SRussell King SFP_E_TIMEOUT, 4973970055SRussell King 5073970055SRussell King SFP_MOD_EMPTY = 0, 5173f5e847SRussell King SFP_MOD_ERROR, 5273970055SRussell King SFP_MOD_PROBE, 5373f5e847SRussell King SFP_MOD_WAITDEV, 543bb35261SJon Nettleton SFP_MOD_HPOWER, 55b036a554SRussell King SFP_MOD_WAITPWR, 5673970055SRussell King SFP_MOD_PRESENT, 5773970055SRussell King 586b0da5c9SRussell King SFP_DEV_DETACHED = 0, 596b0da5c9SRussell King SFP_DEV_DOWN, 6073970055SRussell King SFP_DEV_UP, 6173970055SRussell King 6273970055SRussell King SFP_S_DOWN = 0, 6374c551caSRussell King SFP_S_FAIL, 64eefa6f1fSRussell King SFP_S_WAIT, 6573970055SRussell King SFP_S_INIT, 661cb89a14SRussell King SFP_S_INIT_PHY, 67d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6873970055SRussell King SFP_S_WAIT_LOS, 6973970055SRussell King SFP_S_LINK_UP, 7073970055SRussell King SFP_S_TX_FAULT, 7173970055SRussell King SFP_S_REINIT, 7273970055SRussell King SFP_S_TX_DISABLE, 7373970055SRussell King }; 7473970055SRussell King 754005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 764005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7773f5e847SRussell King [SFP_MOD_ERROR] = "error", 784005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7973f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 804005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 81b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 824005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 834005a7cbSAndrew Lunn }; 844005a7cbSAndrew Lunn 854005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 864005a7cbSAndrew Lunn { 874005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 884005a7cbSAndrew Lunn return "Unknown module state"; 894005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 904005a7cbSAndrew Lunn } 914005a7cbSAndrew Lunn 924005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 936b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 944005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 954005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 964005a7cbSAndrew Lunn }; 974005a7cbSAndrew Lunn 984005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 994005a7cbSAndrew Lunn { 1004005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 1014005a7cbSAndrew Lunn return "Unknown device state"; 1024005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1034005a7cbSAndrew Lunn } 1044005a7cbSAndrew Lunn 1054005a7cbSAndrew Lunn static const char * const event_strings[] = { 1064005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1074005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1086b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1096b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1104005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1114005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1124005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1134005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1144005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1154005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1164005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1174005a7cbSAndrew Lunn }; 1184005a7cbSAndrew Lunn 1194005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1204005a7cbSAndrew Lunn { 1214005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1224005a7cbSAndrew Lunn return "Unknown event"; 1234005a7cbSAndrew Lunn return event_strings[event]; 1244005a7cbSAndrew Lunn } 1254005a7cbSAndrew Lunn 1264005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1274005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 12874c551caSRussell King [SFP_S_FAIL] = "fail", 129eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1304005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1311cb89a14SRussell King [SFP_S_INIT_PHY] = "init_phy", 132d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1334005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1344005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1354005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1364005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 13725a9da66SSean Anderson [SFP_S_TX_DISABLE] = "tx_disable", 1384005a7cbSAndrew Lunn }; 1394005a7cbSAndrew Lunn 1404005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1414005a7cbSAndrew Lunn { 1424005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1434005a7cbSAndrew Lunn return "Unknown state"; 1444005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1454005a7cbSAndrew Lunn } 1464005a7cbSAndrew Lunn 14773970055SRussell King static const char *gpio_of_names[] = { 14825ee0793SBaruch Siach "mod-def0", 14973970055SRussell King "los", 15073970055SRussell King "tx-fault", 15173970055SRussell King "tx-disable", 15225ee0793SBaruch Siach "rate-select0", 15373970055SRussell King }; 15473970055SRussell King 15573970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15673970055SRussell King GPIOD_IN, 15773970055SRussell King GPIOD_IN, 15873970055SRussell King GPIOD_IN, 15973970055SRussell King GPIOD_ASIS, 16073970055SRussell King GPIOD_ASIS, 16173970055SRussell King }; 16273970055SRussell King 16326c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16426c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16526c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 16626c97a2dSRussell King * on board (for a copper SFP) time to initialise. 16726c97a2dSRussell King */ 168eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 169324e88cbSMarek Behún #define T_WAIT_ROLLBALL msecs_to_jiffies(25000) 17026c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 17126c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17226c97a2dSRussell King 17326c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17426c97a2dSRussell King * an indicated TX_FAULT. 17526c97a2dSRussell King */ 17673970055SRussell King #define T_RESET_US 10 17773970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 17873970055SRussell King 17965ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 18065ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 18165ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18265ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18365ef2d5cSRussell King */ 18465ef2d5cSRussell King #define N_FAULT_INIT 5 18565ef2d5cSRussell King #define N_FAULT 5 18665ef2d5cSRussell King 1871cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1881cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1891cb89a14SRussell King */ 1901cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1911cb89a14SRussell King #define R_PHY_RETRY 12 1921cb89a14SRussell King 19373970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19473970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19573970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 19673970055SRussell King * 197d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 198d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 19973970055SRussell King */ 200d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 2013bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 202e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 203e117be74SRussell King #define R_PROBE_RETRY_INIT 10 204e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 205e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 20673970055SRussell King 207516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 20873970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 209324e88cbSMarek Behún * RollBall SFPs access phy via SFP Enhanced Digital Diagnostic Interface 210324e88cbSMarek Behún * via address 0x51 (mdio-i2c will use RollBall protocol on this address). 21173970055SRussell King */ 21273970055SRussell King #define SFP_PHY_ADDR 22 213324e88cbSMarek Behún #define SFP_PHY_ADDR_ROLLBALL 17 21473970055SRussell King 215259c8618SRussell King struct sff_data { 216259c8618SRussell King unsigned int gpios; 217259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 218259c8618SRussell King }; 219259c8618SRussell King 22073970055SRussell King struct sfp { 22173970055SRussell King struct device *dev; 22273970055SRussell King struct i2c_adapter *i2c; 22373970055SRussell King struct mii_bus *i2c_mii; 22473970055SRussell King struct sfp_bus *sfp_bus; 225e85b1347SMarek Behún enum mdio_i2c_proto mdio_protocol; 22673970055SRussell King struct phy_device *mod_phy; 227259c8618SRussell King const struct sff_data *type; 2280d035bedSRussell King size_t i2c_block_size; 2293bb35261SJon Nettleton u32 max_power_mW; 23073970055SRussell King 23173970055SRussell King unsigned int (*get_state)(struct sfp *); 23273970055SRussell King void (*set_state)(struct sfp *, unsigned int); 23373970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2343bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 23573970055SRussell King 23673970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 237257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 23873970055SRussell King 239f3c9a666SRussell King bool need_poll; 240f3c9a666SRussell King 2412158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 2428475c4b7SRussell King (Oracle) unsigned int state_hw_mask; 243f3c9a666SRussell King unsigned int state_soft_mask; 24473970055SRussell King unsigned int state; 24573970055SRussell King struct delayed_work poll; 24673970055SRussell King struct delayed_work timeout; 2472158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 24873970055SRussell King unsigned char sm_mod_state; 249e117be74SRussell King unsigned char sm_mod_tries_init; 250e117be74SRussell King unsigned char sm_mod_tries; 25173970055SRussell King unsigned char sm_dev_state; 25273970055SRussell King unsigned short sm_state; 253281e4eabSRussell King unsigned char sm_fault_retries; 2541cb89a14SRussell King unsigned char sm_phy_retries; 25573970055SRussell King 25673970055SRussell King struct sfp_eeprom_id id; 257ed32abb1SRussell King unsigned int module_power_mW; 25826c97a2dSRussell King unsigned int module_t_start_up; 259324e88cbSMarek Behún unsigned int module_t_wait; 2602069624dSMatthew Hagan bool tx_fault_ignore; 261ed32abb1SRussell King 26223571c7bSRussell King (Oracle) const struct sfp_quirk *quirk; 26323571c7bSRussell King (Oracle) 2641323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2651323061aSAndrew Lunn struct sfp_diag diag; 266139d3a21SRussell King struct delayed_work hwmon_probe; 267139d3a21SRussell King unsigned int hwmon_tries; 2681323061aSAndrew Lunn struct device *hwmon_dev; 2691323061aSAndrew Lunn char *hwmon_name; 2701323061aSAndrew Lunn #endif 2711323061aSAndrew Lunn 2729cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2739cc8976cSRussell King struct dentry *debugfs_dir; 2749cc8976cSRussell King #endif 27573970055SRussell King }; 27673970055SRussell King 277259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 278259c8618SRussell King { 2790fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 280259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 281259c8618SRussell King } 282259c8618SRussell King 283259c8618SRussell King static const struct sff_data sff_data = { 284259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 285259c8618SRussell King .module_supported = sff_module_supported, 286259c8618SRussell King }; 287259c8618SRussell King 288259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 289259c8618SRussell King { 290f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 291f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 292f0b4f847SPali Rohár return true; 293f0b4f847SPali Rohár 294f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 295f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 296f0b4f847SPali Rohár * as supported based on vendor name and pn match. 297f0b4f847SPali Rohár */ 298f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 299f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 300f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 301f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 302f0b4f847SPali Rohár return true; 303f0b4f847SPali Rohár 304f0b4f847SPali Rohár return false; 305259c8618SRussell King } 306259c8618SRussell King 307259c8618SRussell King static const struct sff_data sfp_data = { 308259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 309259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 310259c8618SRussell King .module_supported = sfp_module_supported, 311259c8618SRussell King }; 312259c8618SRussell King 313259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 314259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 315259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 316259c8618SRussell King { }, 317259c8618SRussell King }; 318259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 319259c8618SRussell King 32027541675SRussell King (Oracle) static void sfp_fixup_long_startup(struct sfp *sfp) 32127541675SRussell King (Oracle) { 32227541675SRussell King (Oracle) sfp->module_t_start_up = T_START_UP_BAD_GPON; 32327541675SRussell King (Oracle) } 32427541675SRussell King (Oracle) 3255029be76SRussell King (Oracle) static void sfp_fixup_ignore_tx_fault(struct sfp *sfp) 3265029be76SRussell King (Oracle) { 3275029be76SRussell King (Oracle) sfp->tx_fault_ignore = true; 3285029be76SRussell King (Oracle) } 3295029be76SRussell King (Oracle) 33073472c83SRussell King (Oracle) static void sfp_fixup_halny_gsfp(struct sfp *sfp) 33173472c83SRussell King (Oracle) { 33273472c83SRussell King (Oracle) /* Ignore the TX_FAULT and LOS signals on this module. 33373472c83SRussell King (Oracle) * these are possibly used for other purposes on this 33473472c83SRussell King (Oracle) * module, e.g. a serial port. 33573472c83SRussell King (Oracle) */ 33673472c83SRussell King (Oracle) sfp->state_hw_mask &= ~(SFP_F_TX_FAULT | SFP_F_LOS); 33773472c83SRussell King (Oracle) } 33873472c83SRussell King (Oracle) 339324e88cbSMarek Behún static void sfp_fixup_rollball(struct sfp *sfp) 340324e88cbSMarek Behún { 341324e88cbSMarek Behún sfp->mdio_protocol = MDIO_I2C_ROLLBALL; 342324e88cbSMarek Behún sfp->module_t_wait = T_WAIT_ROLLBALL; 343324e88cbSMarek Behún } 344324e88cbSMarek Behún 345324e88cbSMarek Behún static void sfp_fixup_rollball_cc(struct sfp *sfp) 346324e88cbSMarek Behún { 347324e88cbSMarek Behún sfp_fixup_rollball(sfp); 348324e88cbSMarek Behún 349324e88cbSMarek Behún /* Some RollBall SFPs may have wrong (zero) extended compliance code 350324e88cbSMarek Behún * burned in EEPROM. For PHY probing we need the correct one. 351324e88cbSMarek Behún */ 352324e88cbSMarek Behún sfp->id.base.extended_cc = SFF8024_ECC_10GBASE_T_SFI; 353324e88cbSMarek Behún } 354324e88cbSMarek Behún 35523571c7bSRussell King (Oracle) static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id, 356fd580c98SRussell King unsigned long *modes, 357fd580c98SRussell King unsigned long *interfaces) 35823571c7bSRussell King (Oracle) { 35923571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, modes); 360fd580c98SRussell King __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 36123571c7bSRussell King (Oracle) } 36223571c7bSRussell King (Oracle) 36323571c7bSRussell King (Oracle) static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id, 364fd580c98SRussell King unsigned long *modes, 365fd580c98SRussell King unsigned long *interfaces) 36623571c7bSRussell King (Oracle) { 36723571c7bSRussell King (Oracle) /* Ubiquiti U-Fiber Instant module claims that support all transceiver 36823571c7bSRussell King (Oracle) * types including 10G Ethernet which is not truth. So clear all claimed 36923571c7bSRussell King (Oracle) * modes and set only one mode which module supports: 1000baseX_Full. 37023571c7bSRussell King (Oracle) */ 37123571c7bSRussell King (Oracle) linkmode_zero(modes); 37223571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, modes); 37323571c7bSRussell King (Oracle) } 37423571c7bSRussell King (Oracle) 37513c8adcfSMarek Behún #define SFP_QUIRK(_v, _p, _m, _f) \ 37613c8adcfSMarek Behún { .vendor = _v, .part = _p, .modes = _m, .fixup = _f, } 37713c8adcfSMarek Behún #define SFP_QUIRK_M(_v, _p, _m) SFP_QUIRK(_v, _p, _m, NULL) 37813c8adcfSMarek Behún #define SFP_QUIRK_F(_v, _p, _f) SFP_QUIRK(_v, _p, NULL, _f) 37913c8adcfSMarek Behún 38023571c7bSRussell King (Oracle) static const struct sfp_quirk sfp_quirks[] = { 38113c8adcfSMarek Behún // Alcatel Lucent G-010S-P can operate at 2500base-X, but incorrectly 38213c8adcfSMarek Behún // report 2500MBd NRZ in their EEPROM 38313c8adcfSMarek Behún SFP_QUIRK_M("ALCATELLUCENT", "G010SP", sfp_quirk_2500basex), 38413c8adcfSMarek Behún 38513c8adcfSMarek Behún // Alcatel Lucent G-010S-A can operate at 2500base-X, but report 3.2GBd 38623571c7bSRussell King (Oracle) // NRZ in their EEPROM 38713c8adcfSMarek Behún SFP_QUIRK("ALCATELLUCENT", "3FE46541AA", sfp_quirk_2500basex, 38813c8adcfSMarek Behún sfp_fixup_long_startup), 38913c8adcfSMarek Behún 39013c8adcfSMarek Behún SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp), 39113c8adcfSMarek Behún 39213c8adcfSMarek Behún // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in 39313c8adcfSMarek Behún // their EEPROM 39413c8adcfSMarek Behún SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex, 39513c8adcfSMarek Behún sfp_fixup_ignore_tx_fault), 39613c8adcfSMarek Behún 39713c8adcfSMarek Behún // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report 39813c8adcfSMarek Behún // 2500MBd NRZ in their EEPROM 39913c8adcfSMarek Behún SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex), 40013c8adcfSMarek Behún 40113c8adcfSMarek Behún SFP_QUIRK_M("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant), 402324e88cbSMarek Behún 403324e88cbSMarek Behún SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc), 404324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc), 405324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc), 406324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), 407324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), 40823571c7bSRussell King (Oracle) }; 40923571c7bSRussell King (Oracle) 41023571c7bSRussell King (Oracle) static size_t sfp_strlen(const char *str, size_t maxlen) 41123571c7bSRussell King (Oracle) { 41223571c7bSRussell King (Oracle) size_t size, i; 41323571c7bSRussell King (Oracle) 41473472c83SRussell King (Oracle) /* Trailing characters should be filled with space chars, but 41573472c83SRussell King (Oracle) * some manufacturers can't read SFF-8472 and use NUL. 41673472c83SRussell King (Oracle) */ 41723571c7bSRussell King (Oracle) for (i = 0, size = 0; i < maxlen; i++) 41873472c83SRussell King (Oracle) if (str[i] != ' ' && str[i] != '\0') 41923571c7bSRussell King (Oracle) size = i + 1; 42023571c7bSRussell King (Oracle) 42123571c7bSRussell King (Oracle) return size; 42223571c7bSRussell King (Oracle) } 42323571c7bSRussell King (Oracle) 42423571c7bSRussell King (Oracle) static bool sfp_match(const char *qs, const char *str, size_t len) 42523571c7bSRussell King (Oracle) { 42623571c7bSRussell King (Oracle) if (!qs) 42723571c7bSRussell King (Oracle) return true; 42823571c7bSRussell King (Oracle) if (strlen(qs) != len) 42923571c7bSRussell King (Oracle) return false; 43023571c7bSRussell King (Oracle) return !strncmp(qs, str, len); 43123571c7bSRussell King (Oracle) } 43223571c7bSRussell King (Oracle) 43323571c7bSRussell King (Oracle) static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) 43423571c7bSRussell King (Oracle) { 43523571c7bSRussell King (Oracle) const struct sfp_quirk *q; 43623571c7bSRussell King (Oracle) unsigned int i; 43723571c7bSRussell King (Oracle) size_t vs, ps; 43823571c7bSRussell King (Oracle) 43923571c7bSRussell King (Oracle) vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); 44023571c7bSRussell King (Oracle) ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); 44123571c7bSRussell King (Oracle) 44223571c7bSRussell King (Oracle) for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) 44323571c7bSRussell King (Oracle) if (sfp_match(q->vendor, id->base.vendor_name, vs) && 44423571c7bSRussell King (Oracle) sfp_match(q->part, id->base.vendor_pn, ps)) 44523571c7bSRussell King (Oracle) return q; 44623571c7bSRussell King (Oracle) 44723571c7bSRussell King (Oracle) return NULL; 44823571c7bSRussell King (Oracle) } 44923571c7bSRussell King (Oracle) 45073970055SRussell King static unsigned long poll_jiffies; 45173970055SRussell King 45273970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 45373970055SRussell King { 45473970055SRussell King unsigned int i, state, v; 45573970055SRussell King 45673970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 45773970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 45873970055SRussell King continue; 45973970055SRussell King 46073970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 46173970055SRussell King if (v) 46273970055SRussell King state |= BIT(i); 46373970055SRussell King } 46473970055SRussell King 46573970055SRussell King return state; 46673970055SRussell King } 46773970055SRussell King 468259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 469259c8618SRussell King { 470259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 471259c8618SRussell King } 472259c8618SRussell King 47373970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 47473970055SRussell King { 47573970055SRussell King if (state & SFP_F_PRESENT) { 47673970055SRussell King /* If the module is present, drive the signals */ 47773970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 47873970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 47973970055SRussell King state & SFP_F_TX_DISABLE); 48073970055SRussell King if (state & SFP_F_RATE_SELECT) 48173970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 48273970055SRussell King state & SFP_F_RATE_SELECT); 48373970055SRussell King } else { 48473970055SRussell King /* Otherwise, let them float to the pull-ups */ 48573970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 48673970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 48773970055SRussell King if (state & SFP_F_RATE_SELECT) 48873970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 48973970055SRussell King } 49073970055SRussell King } 49173970055SRussell King 4923bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 4933bb35261SJon Nettleton size_t len) 49473970055SRussell King { 49573970055SRussell King struct i2c_msg msgs[2]; 496426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 497426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 49828e74a7cSRussell King size_t this_len; 49973970055SRussell King int ret; 50073970055SRussell King 50173970055SRussell King msgs[0].addr = bus_addr; 50273970055SRussell King msgs[0].flags = 0; 50373970055SRussell King msgs[0].len = 1; 50473970055SRussell King msgs[0].buf = &dev_addr; 50573970055SRussell King msgs[1].addr = bus_addr; 50673970055SRussell King msgs[1].flags = I2C_M_RD; 50773970055SRussell King msgs[1].len = len; 50873970055SRussell King msgs[1].buf = buf; 50973970055SRussell King 51028e74a7cSRussell King while (len) { 51128e74a7cSRussell King this_len = len; 5120d035bedSRussell King if (this_len > block_size) 5130d035bedSRussell King this_len = block_size; 51428e74a7cSRussell King 51528e74a7cSRussell King msgs[1].len = this_len; 51628e74a7cSRussell King 5173bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 51873970055SRussell King if (ret < 0) 51973970055SRussell King return ret; 52073970055SRussell King 52128e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 52228e74a7cSRussell King break; 52328e74a7cSRussell King 52428e74a7cSRussell King msgs[1].buf += this_len; 52528e74a7cSRussell King dev_addr += this_len; 52628e74a7cSRussell King len -= this_len; 52728e74a7cSRussell King } 52828e74a7cSRussell King 52928e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 53073970055SRussell King } 53173970055SRussell King 5323bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 53373970055SRussell King size_t len) 53473970055SRussell King { 5353bb35261SJon Nettleton struct i2c_msg msgs[1]; 5363bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 5373bb35261SJon Nettleton int ret; 5383bb35261SJon Nettleton 5393bb35261SJon Nettleton msgs[0].addr = bus_addr; 5403bb35261SJon Nettleton msgs[0].flags = 0; 5413bb35261SJon Nettleton msgs[0].len = 1 + len; 5423bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 5433bb35261SJon Nettleton if (!msgs[0].buf) 5443bb35261SJon Nettleton return -ENOMEM; 5453bb35261SJon Nettleton 5463bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 5473bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 5483bb35261SJon Nettleton 5493bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 5503bb35261SJon Nettleton 5513bb35261SJon Nettleton kfree(msgs[0].buf); 5523bb35261SJon Nettleton 5533bb35261SJon Nettleton if (ret < 0) 5543bb35261SJon Nettleton return ret; 5553bb35261SJon Nettleton 5563bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 55773970055SRussell King } 55873970055SRussell King 55973970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 56073970055SRussell King { 56173970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 56273970055SRussell King return -EINVAL; 56373970055SRussell King 56473970055SRussell King sfp->i2c = i2c; 56573970055SRussell King sfp->read = sfp_i2c_read; 5663bb35261SJon Nettleton sfp->write = sfp_i2c_write; 56773970055SRussell King 568e85b1347SMarek Behún return 0; 569e85b1347SMarek Behún } 570e85b1347SMarek Behún 571e85b1347SMarek Behún static int sfp_i2c_mdiobus_create(struct sfp *sfp) 572e85b1347SMarek Behún { 573e85b1347SMarek Behún struct mii_bus *i2c_mii; 574e85b1347SMarek Behún int ret; 575e85b1347SMarek Behún 57609bbedacSMarek Behún i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, sfp->mdio_protocol); 57773970055SRussell King if (IS_ERR(i2c_mii)) 57873970055SRussell King return PTR_ERR(i2c_mii); 57973970055SRussell King 58073970055SRussell King i2c_mii->name = "SFP I2C Bus"; 58173970055SRussell King i2c_mii->phy_mask = ~0; 58273970055SRussell King 58373970055SRussell King ret = mdiobus_register(i2c_mii); 58473970055SRussell King if (ret < 0) { 58573970055SRussell King mdiobus_free(i2c_mii); 58673970055SRussell King return ret; 58773970055SRussell King } 58873970055SRussell King 58973970055SRussell King sfp->i2c_mii = i2c_mii; 59073970055SRussell King 59173970055SRussell King return 0; 59273970055SRussell King } 59373970055SRussell King 594e85b1347SMarek Behún static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) 595e85b1347SMarek Behún { 596e85b1347SMarek Behún mdiobus_unregister(sfp->i2c_mii); 597e85b1347SMarek Behún sfp->i2c_mii = NULL; 598e85b1347SMarek Behún } 599e85b1347SMarek Behún 60073970055SRussell King /* Interface */ 60173970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 60273970055SRussell King { 60373970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 60473970055SRussell King } 60573970055SRussell King 6063bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 6073bb35261SJon Nettleton { 6083bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 6093bb35261SJon Nettleton } 6103bb35261SJon Nettleton 611a3c536fcSRussell King (Oracle) static int sfp_modify_u8(struct sfp *sfp, bool a2, u8 addr, u8 mask, u8 val) 612a3c536fcSRussell King (Oracle) { 613a3c536fcSRussell King (Oracle) int ret; 614a3c536fcSRussell King (Oracle) u8 old, v; 615a3c536fcSRussell King (Oracle) 616a3c536fcSRussell King (Oracle) ret = sfp_read(sfp, a2, addr, &old, sizeof(old)); 617a3c536fcSRussell King (Oracle) if (ret != sizeof(old)) 618a3c536fcSRussell King (Oracle) return ret; 619a3c536fcSRussell King (Oracle) 620a3c536fcSRussell King (Oracle) v = (old & ~mask) | (val & mask); 621a3c536fcSRussell King (Oracle) if (v == old) 622a3c536fcSRussell King (Oracle) return sizeof(v); 623a3c536fcSRussell King (Oracle) 624a3c536fcSRussell King (Oracle) return sfp_write(sfp, a2, addr, &v, sizeof(v)); 625a3c536fcSRussell King (Oracle) } 626a3c536fcSRussell King (Oracle) 627f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 628f3c9a666SRussell King { 629f3c9a666SRussell King unsigned int state = 0; 630f3c9a666SRussell King u8 status; 6310dea4d03SRussell King int ret; 632f3c9a666SRussell King 6330dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 6340dea4d03SRussell King if (ret == sizeof(status)) { 635f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 636f3c9a666SRussell King state |= SFP_F_LOS; 637f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 638f3c9a666SRussell King state |= SFP_F_TX_FAULT; 6390dea4d03SRussell King } else { 6400dea4d03SRussell King dev_err_ratelimited(sfp->dev, 6419ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 6429ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 6430dea4d03SRussell King /* Preserve the current state */ 6440dea4d03SRussell King state = sfp->state; 645f3c9a666SRussell King } 646f3c9a666SRussell King 647f3c9a666SRussell King return state & sfp->state_soft_mask; 648f3c9a666SRussell King } 649f3c9a666SRussell King 650f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 651f3c9a666SRussell King { 652a3c536fcSRussell King (Oracle) u8 mask = SFP_STATUS_TX_DISABLE_FORCE; 653a3c536fcSRussell King (Oracle) u8 val = 0; 654f3c9a666SRussell King 655f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 656a3c536fcSRussell King (Oracle) val |= SFP_STATUS_TX_DISABLE_FORCE; 657f3c9a666SRussell King 658a3c536fcSRussell King (Oracle) 659a3c536fcSRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); 660f3c9a666SRussell King } 661f3c9a666SRussell King 662f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 663f3c9a666SRussell King { 664f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 6658475c4b7SRussell King (Oracle) unsigned int mask = 0; 666f3c9a666SRussell King 667f3c9a666SRussell King sfp->state_soft_mask = 0; 6688475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 6698475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 6708475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 6718475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 6728475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 6738475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 6748475c4b7SRussell King (Oracle) 6758475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 6768475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 677f3c9a666SRussell King 678f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 679f3c9a666SRussell King !sfp->need_poll) 680f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 681f3c9a666SRussell King } 682f3c9a666SRussell King 683f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 684f3c9a666SRussell King { 685f3c9a666SRussell King sfp->state_soft_mask = 0; 686f3c9a666SRussell King } 687f3c9a666SRussell King 688f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 689f3c9a666SRussell King { 6908475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 6918475c4b7SRussell King (Oracle) unsigned int state; 692f3c9a666SRussell King 6938475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 6948475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 695f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 696f3c9a666SRussell King 697f3c9a666SRussell King return state; 698f3c9a666SRussell King } 699f3c9a666SRussell King 700f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 701f3c9a666SRussell King { 702f3c9a666SRussell King sfp->set_state(sfp, state); 703f3c9a666SRussell King 704f3c9a666SRussell King if (state & SFP_F_PRESENT && 705f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 706f3c9a666SRussell King sfp_soft_set_state(sfp, state); 707f3c9a666SRussell King } 708f3c9a666SRussell King 70973970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 71073970055SRussell King { 71173970055SRussell King u8 *p, check; 71273970055SRussell King 71373970055SRussell King for (p = buf, check = 0; len; p++, len--) 71473970055SRussell King check += *p; 71573970055SRussell King 71673970055SRussell King return check; 71773970055SRussell King } 71873970055SRussell King 7191323061aSAndrew Lunn /* hwmon */ 7201323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 7211323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 7221323061aSAndrew Lunn enum hwmon_sensor_types type, 7231323061aSAndrew Lunn u32 attr, int channel) 7241323061aSAndrew Lunn { 7251323061aSAndrew Lunn const struct sfp *sfp = data; 7261323061aSAndrew Lunn 7271323061aSAndrew Lunn switch (type) { 7281323061aSAndrew Lunn case hwmon_temp: 7291323061aSAndrew Lunn switch (attr) { 7301323061aSAndrew Lunn case hwmon_temp_min_alarm: 7311323061aSAndrew Lunn case hwmon_temp_max_alarm: 7321323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7331323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7341323061aSAndrew Lunn case hwmon_temp_min: 7351323061aSAndrew Lunn case hwmon_temp_max: 7361323061aSAndrew Lunn case hwmon_temp_lcrit: 7371323061aSAndrew Lunn case hwmon_temp_crit: 738a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 739a33710bdSAndrew Lunn return 0; 740df561f66SGustavo A. R. Silva fallthrough; 741a33710bdSAndrew Lunn case hwmon_temp_input: 742c1236979SAndrew Lunn case hwmon_temp_label: 7431323061aSAndrew Lunn return 0444; 7441323061aSAndrew Lunn default: 7451323061aSAndrew Lunn return 0; 7461323061aSAndrew Lunn } 7471323061aSAndrew Lunn case hwmon_in: 7481323061aSAndrew Lunn switch (attr) { 7491323061aSAndrew Lunn case hwmon_in_min_alarm: 7501323061aSAndrew Lunn case hwmon_in_max_alarm: 7511323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7521323061aSAndrew Lunn case hwmon_in_crit_alarm: 7531323061aSAndrew Lunn case hwmon_in_min: 7541323061aSAndrew Lunn case hwmon_in_max: 7551323061aSAndrew Lunn case hwmon_in_lcrit: 7561323061aSAndrew Lunn case hwmon_in_crit: 757a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 758a33710bdSAndrew Lunn return 0; 759df561f66SGustavo A. R. Silva fallthrough; 760a33710bdSAndrew Lunn case hwmon_in_input: 761c1236979SAndrew Lunn case hwmon_in_label: 7621323061aSAndrew Lunn return 0444; 7631323061aSAndrew Lunn default: 7641323061aSAndrew Lunn return 0; 7651323061aSAndrew Lunn } 7661323061aSAndrew Lunn case hwmon_curr: 7671323061aSAndrew Lunn switch (attr) { 7681323061aSAndrew Lunn case hwmon_curr_min_alarm: 7691323061aSAndrew Lunn case hwmon_curr_max_alarm: 7701323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 7711323061aSAndrew Lunn case hwmon_curr_crit_alarm: 7721323061aSAndrew Lunn case hwmon_curr_min: 7731323061aSAndrew Lunn case hwmon_curr_max: 7741323061aSAndrew Lunn case hwmon_curr_lcrit: 7751323061aSAndrew Lunn case hwmon_curr_crit: 776a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 777a33710bdSAndrew Lunn return 0; 778df561f66SGustavo A. R. Silva fallthrough; 779a33710bdSAndrew Lunn case hwmon_curr_input: 780c1236979SAndrew Lunn case hwmon_curr_label: 7811323061aSAndrew Lunn return 0444; 7821323061aSAndrew Lunn default: 7831323061aSAndrew Lunn return 0; 7841323061aSAndrew Lunn } 7851323061aSAndrew Lunn case hwmon_power: 7861323061aSAndrew Lunn /* External calibration of receive power requires 7871323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 7881323061aSAndrew Lunn * is not easy, so just skip it. If the module does 7891323061aSAndrew Lunn * not require external calibration, we can however 7901323061aSAndrew Lunn * show receiver power, since FP is then not needed. 7911323061aSAndrew Lunn */ 7921323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 7931323061aSAndrew Lunn channel == 1) 7941323061aSAndrew Lunn return 0; 7951323061aSAndrew Lunn switch (attr) { 7961323061aSAndrew Lunn case hwmon_power_min_alarm: 7971323061aSAndrew Lunn case hwmon_power_max_alarm: 7981323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 7991323061aSAndrew Lunn case hwmon_power_crit_alarm: 8001323061aSAndrew Lunn case hwmon_power_min: 8011323061aSAndrew Lunn case hwmon_power_max: 8021323061aSAndrew Lunn case hwmon_power_lcrit: 8031323061aSAndrew Lunn case hwmon_power_crit: 804a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 805a33710bdSAndrew Lunn return 0; 806df561f66SGustavo A. R. Silva fallthrough; 807a33710bdSAndrew Lunn case hwmon_power_input: 808c1236979SAndrew Lunn case hwmon_power_label: 8091323061aSAndrew Lunn return 0444; 8101323061aSAndrew Lunn default: 8111323061aSAndrew Lunn return 0; 8121323061aSAndrew Lunn } 8131323061aSAndrew Lunn default: 8141323061aSAndrew Lunn return 0; 8151323061aSAndrew Lunn } 8161323061aSAndrew Lunn } 8171323061aSAndrew Lunn 8181323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 8191323061aSAndrew Lunn { 8201323061aSAndrew Lunn __be16 val; 8211323061aSAndrew Lunn int err; 8221323061aSAndrew Lunn 8231323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 8241323061aSAndrew Lunn if (err < 0) 8251323061aSAndrew Lunn return err; 8261323061aSAndrew Lunn 8271323061aSAndrew Lunn *value = be16_to_cpu(val); 8281323061aSAndrew Lunn 8291323061aSAndrew Lunn return 0; 8301323061aSAndrew Lunn } 8311323061aSAndrew Lunn 8321323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 8331323061aSAndrew Lunn { 8340cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8351323061aSAndrew Lunn } 8361323061aSAndrew Lunn 8371323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 8381323061aSAndrew Lunn long *value) 8391323061aSAndrew Lunn { 8401323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 8411323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 8421323061aSAndrew Lunn } 8431323061aSAndrew Lunn 8441323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 8451323061aSAndrew Lunn { 8461323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 8471323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 8481323061aSAndrew Lunn 8491323061aSAndrew Lunn if (*value >= 0x8000) 8501323061aSAndrew Lunn *value -= 0x10000; 8511323061aSAndrew Lunn 8521323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 8531323061aSAndrew Lunn } 8541323061aSAndrew Lunn 8551323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 8561323061aSAndrew Lunn { 8571323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 8581323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 8591323061aSAndrew Lunn 8601323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8611323061aSAndrew Lunn } 8621323061aSAndrew Lunn 8631323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 8641323061aSAndrew Lunn { 8651323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 8661323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 8671323061aSAndrew Lunn 8681323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 8691323061aSAndrew Lunn } 8701323061aSAndrew Lunn 8711323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 8721323061aSAndrew Lunn { 8731323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 8741323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 8751323061aSAndrew Lunn 8761323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8771323061aSAndrew Lunn } 8781323061aSAndrew Lunn 8791323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 8801323061aSAndrew Lunn { 8811323061aSAndrew Lunn int err; 8821323061aSAndrew Lunn 8831323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 8841323061aSAndrew Lunn if (err < 0) 8851323061aSAndrew Lunn return err; 8861323061aSAndrew Lunn 8871323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8881323061aSAndrew Lunn 8891323061aSAndrew Lunn return 0; 8901323061aSAndrew Lunn } 8911323061aSAndrew Lunn 8921323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 8931323061aSAndrew Lunn { 8941323061aSAndrew Lunn int err; 8951323061aSAndrew Lunn 8961323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 8971323061aSAndrew Lunn if (err < 0) 8981323061aSAndrew Lunn return err; 8991323061aSAndrew Lunn 9001323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 9011323061aSAndrew Lunn 9021323061aSAndrew Lunn return 0; 9031323061aSAndrew Lunn } 9041323061aSAndrew Lunn 9051323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 9061323061aSAndrew Lunn { 9071323061aSAndrew Lunn int err; 9081323061aSAndrew Lunn 9091323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9101323061aSAndrew Lunn if (err < 0) 9111323061aSAndrew Lunn return err; 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9141323061aSAndrew Lunn 9151323061aSAndrew Lunn return 0; 9161323061aSAndrew Lunn } 9171323061aSAndrew Lunn 9181323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 9191323061aSAndrew Lunn { 9201323061aSAndrew Lunn int err; 9211323061aSAndrew Lunn 9221323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9231323061aSAndrew Lunn if (err < 0) 9241323061aSAndrew Lunn return err; 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9271323061aSAndrew Lunn 9281323061aSAndrew Lunn return 0; 9291323061aSAndrew Lunn } 9301323061aSAndrew Lunn 9311323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 9321323061aSAndrew Lunn { 9331323061aSAndrew Lunn int err; 9341323061aSAndrew Lunn 9351323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9361323061aSAndrew Lunn if (err < 0) 9371323061aSAndrew Lunn return err; 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9401323061aSAndrew Lunn 9411323061aSAndrew Lunn return 0; 9421323061aSAndrew Lunn } 9431323061aSAndrew Lunn 9441323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 9451323061aSAndrew Lunn { 9461323061aSAndrew Lunn u8 status; 9471323061aSAndrew Lunn int err; 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn switch (attr) { 9501323061aSAndrew Lunn case hwmon_temp_input: 9511323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 9521323061aSAndrew Lunn 9531323061aSAndrew Lunn case hwmon_temp_lcrit: 9541323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 9551323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9561323061aSAndrew Lunn return 0; 9571323061aSAndrew Lunn 9581323061aSAndrew Lunn case hwmon_temp_min: 9591323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 9601323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9611323061aSAndrew Lunn return 0; 9621323061aSAndrew Lunn case hwmon_temp_max: 9631323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 9641323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9651323061aSAndrew Lunn return 0; 9661323061aSAndrew Lunn 9671323061aSAndrew Lunn case hwmon_temp_crit: 9681323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 9691323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9701323061aSAndrew Lunn return 0; 9711323061aSAndrew Lunn 9721323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 9731323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9741323061aSAndrew Lunn if (err < 0) 9751323061aSAndrew Lunn return err; 9761323061aSAndrew Lunn 9771323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 9781323061aSAndrew Lunn return 0; 9791323061aSAndrew Lunn 9801323061aSAndrew Lunn case hwmon_temp_min_alarm: 9811323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9821323061aSAndrew Lunn if (err < 0) 9831323061aSAndrew Lunn return err; 9841323061aSAndrew Lunn 9851323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 9861323061aSAndrew Lunn return 0; 9871323061aSAndrew Lunn 9881323061aSAndrew Lunn case hwmon_temp_max_alarm: 9891323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9901323061aSAndrew Lunn if (err < 0) 9911323061aSAndrew Lunn return err; 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 9941323061aSAndrew Lunn return 0; 9951323061aSAndrew Lunn 9961323061aSAndrew Lunn case hwmon_temp_crit_alarm: 9971323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9981323061aSAndrew Lunn if (err < 0) 9991323061aSAndrew Lunn return err; 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 10021323061aSAndrew Lunn return 0; 10031323061aSAndrew Lunn default: 10041323061aSAndrew Lunn return -EOPNOTSUPP; 10051323061aSAndrew Lunn } 10061323061aSAndrew Lunn 10071323061aSAndrew Lunn return -EOPNOTSUPP; 10081323061aSAndrew Lunn } 10091323061aSAndrew Lunn 10101323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 10111323061aSAndrew Lunn { 10121323061aSAndrew Lunn u8 status; 10131323061aSAndrew Lunn int err; 10141323061aSAndrew Lunn 10151323061aSAndrew Lunn switch (attr) { 10161323061aSAndrew Lunn case hwmon_in_input: 10171323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn case hwmon_in_lcrit: 10201323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 10211323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10221323061aSAndrew Lunn return 0; 10231323061aSAndrew Lunn 10241323061aSAndrew Lunn case hwmon_in_min: 10251323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 10261323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10271323061aSAndrew Lunn return 0; 10281323061aSAndrew Lunn 10291323061aSAndrew Lunn case hwmon_in_max: 10301323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 10311323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10321323061aSAndrew Lunn return 0; 10331323061aSAndrew Lunn 10341323061aSAndrew Lunn case hwmon_in_crit: 10351323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 10361323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10371323061aSAndrew Lunn return 0; 10381323061aSAndrew Lunn 10391323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 10401323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10411323061aSAndrew Lunn if (err < 0) 10421323061aSAndrew Lunn return err; 10431323061aSAndrew Lunn 10441323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 10451323061aSAndrew Lunn return 0; 10461323061aSAndrew Lunn 10471323061aSAndrew Lunn case hwmon_in_min_alarm: 10481323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10491323061aSAndrew Lunn if (err < 0) 10501323061aSAndrew Lunn return err; 10511323061aSAndrew Lunn 10521323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 10531323061aSAndrew Lunn return 0; 10541323061aSAndrew Lunn 10551323061aSAndrew Lunn case hwmon_in_max_alarm: 10561323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10571323061aSAndrew Lunn if (err < 0) 10581323061aSAndrew Lunn return err; 10591323061aSAndrew Lunn 10601323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 10611323061aSAndrew Lunn return 0; 10621323061aSAndrew Lunn 10631323061aSAndrew Lunn case hwmon_in_crit_alarm: 10641323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10651323061aSAndrew Lunn if (err < 0) 10661323061aSAndrew Lunn return err; 10671323061aSAndrew Lunn 10681323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 10691323061aSAndrew Lunn return 0; 10701323061aSAndrew Lunn default: 10711323061aSAndrew Lunn return -EOPNOTSUPP; 10721323061aSAndrew Lunn } 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn return -EOPNOTSUPP; 10751323061aSAndrew Lunn } 10761323061aSAndrew Lunn 10771323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 10781323061aSAndrew Lunn { 10791323061aSAndrew Lunn u8 status; 10801323061aSAndrew Lunn int err; 10811323061aSAndrew Lunn 10821323061aSAndrew Lunn switch (attr) { 10831323061aSAndrew Lunn case hwmon_curr_input: 10841323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 10851323061aSAndrew Lunn 10861323061aSAndrew Lunn case hwmon_curr_lcrit: 10871323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 10881323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10891323061aSAndrew Lunn return 0; 10901323061aSAndrew Lunn 10911323061aSAndrew Lunn case hwmon_curr_min: 10921323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 10931323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10941323061aSAndrew Lunn return 0; 10951323061aSAndrew Lunn 10961323061aSAndrew Lunn case hwmon_curr_max: 10971323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 10981323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10991323061aSAndrew Lunn return 0; 11001323061aSAndrew Lunn 11011323061aSAndrew Lunn case hwmon_curr_crit: 11021323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 11031323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11041323061aSAndrew Lunn return 0; 11051323061aSAndrew Lunn 11061323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 11071323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11081323061aSAndrew Lunn if (err < 0) 11091323061aSAndrew Lunn return err; 11101323061aSAndrew Lunn 11111323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 11121323061aSAndrew Lunn return 0; 11131323061aSAndrew Lunn 11141323061aSAndrew Lunn case hwmon_curr_min_alarm: 11151323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11161323061aSAndrew Lunn if (err < 0) 11171323061aSAndrew Lunn return err; 11181323061aSAndrew Lunn 11191323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 11201323061aSAndrew Lunn return 0; 11211323061aSAndrew Lunn 11221323061aSAndrew Lunn case hwmon_curr_max_alarm: 11231323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11241323061aSAndrew Lunn if (err < 0) 11251323061aSAndrew Lunn return err; 11261323061aSAndrew Lunn 11271323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 11281323061aSAndrew Lunn return 0; 11291323061aSAndrew Lunn 11301323061aSAndrew Lunn case hwmon_curr_crit_alarm: 11311323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11321323061aSAndrew Lunn if (err < 0) 11331323061aSAndrew Lunn return err; 11341323061aSAndrew Lunn 11351323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 11361323061aSAndrew Lunn return 0; 11371323061aSAndrew Lunn default: 11381323061aSAndrew Lunn return -EOPNOTSUPP; 11391323061aSAndrew Lunn } 11401323061aSAndrew Lunn 11411323061aSAndrew Lunn return -EOPNOTSUPP; 11421323061aSAndrew Lunn } 11431323061aSAndrew Lunn 11441323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 11451323061aSAndrew Lunn { 11461323061aSAndrew Lunn u8 status; 11471323061aSAndrew Lunn int err; 11481323061aSAndrew Lunn 11491323061aSAndrew Lunn switch (attr) { 11501323061aSAndrew Lunn case hwmon_power_input: 11511323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 11521323061aSAndrew Lunn 11531323061aSAndrew Lunn case hwmon_power_lcrit: 11541323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 11551323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11561323061aSAndrew Lunn return 0; 11571323061aSAndrew Lunn 11581323061aSAndrew Lunn case hwmon_power_min: 11591323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 11601323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11611323061aSAndrew Lunn return 0; 11621323061aSAndrew Lunn 11631323061aSAndrew Lunn case hwmon_power_max: 11641323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 11651323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11661323061aSAndrew Lunn return 0; 11671323061aSAndrew Lunn 11681323061aSAndrew Lunn case hwmon_power_crit: 11691323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 11701323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11711323061aSAndrew Lunn return 0; 11721323061aSAndrew Lunn 11731323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 11741323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11751323061aSAndrew Lunn if (err < 0) 11761323061aSAndrew Lunn return err; 11771323061aSAndrew Lunn 11781323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 11791323061aSAndrew Lunn return 0; 11801323061aSAndrew Lunn 11811323061aSAndrew Lunn case hwmon_power_min_alarm: 11821323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11831323061aSAndrew Lunn if (err < 0) 11841323061aSAndrew Lunn return err; 11851323061aSAndrew Lunn 11861323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 11871323061aSAndrew Lunn return 0; 11881323061aSAndrew Lunn 11891323061aSAndrew Lunn case hwmon_power_max_alarm: 11901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11911323061aSAndrew Lunn if (err < 0) 11921323061aSAndrew Lunn return err; 11931323061aSAndrew Lunn 11941323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 11951323061aSAndrew Lunn return 0; 11961323061aSAndrew Lunn 11971323061aSAndrew Lunn case hwmon_power_crit_alarm: 11981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11991323061aSAndrew Lunn if (err < 0) 12001323061aSAndrew Lunn return err; 12011323061aSAndrew Lunn 12021323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 12031323061aSAndrew Lunn return 0; 12041323061aSAndrew Lunn default: 12051323061aSAndrew Lunn return -EOPNOTSUPP; 12061323061aSAndrew Lunn } 12071323061aSAndrew Lunn 12081323061aSAndrew Lunn return -EOPNOTSUPP; 12091323061aSAndrew Lunn } 12101323061aSAndrew Lunn 12111323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 12121323061aSAndrew Lunn { 12131323061aSAndrew Lunn u8 status; 12141323061aSAndrew Lunn int err; 12151323061aSAndrew Lunn 12161323061aSAndrew Lunn switch (attr) { 12171323061aSAndrew Lunn case hwmon_power_input: 12181323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 12191323061aSAndrew Lunn 12201323061aSAndrew Lunn case hwmon_power_lcrit: 12211323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 12221323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12231323061aSAndrew Lunn return 0; 12241323061aSAndrew Lunn 12251323061aSAndrew Lunn case hwmon_power_min: 12261323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 12271323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12281323061aSAndrew Lunn return 0; 12291323061aSAndrew Lunn 12301323061aSAndrew Lunn case hwmon_power_max: 12311323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 12321323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12331323061aSAndrew Lunn return 0; 12341323061aSAndrew Lunn 12351323061aSAndrew Lunn case hwmon_power_crit: 12361323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 12371323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12381323061aSAndrew Lunn return 0; 12391323061aSAndrew Lunn 12401323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12411323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12421323061aSAndrew Lunn if (err < 0) 12431323061aSAndrew Lunn return err; 12441323061aSAndrew Lunn 12451323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 12461323061aSAndrew Lunn return 0; 12471323061aSAndrew Lunn 12481323061aSAndrew Lunn case hwmon_power_min_alarm: 12491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12501323061aSAndrew Lunn if (err < 0) 12511323061aSAndrew Lunn return err; 12521323061aSAndrew Lunn 12531323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 12541323061aSAndrew Lunn return 0; 12551323061aSAndrew Lunn 12561323061aSAndrew Lunn case hwmon_power_max_alarm: 12571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12581323061aSAndrew Lunn if (err < 0) 12591323061aSAndrew Lunn return err; 12601323061aSAndrew Lunn 12611323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 12621323061aSAndrew Lunn return 0; 12631323061aSAndrew Lunn 12641323061aSAndrew Lunn case hwmon_power_crit_alarm: 12651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12661323061aSAndrew Lunn if (err < 0) 12671323061aSAndrew Lunn return err; 12681323061aSAndrew Lunn 12691323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 12701323061aSAndrew Lunn return 0; 12711323061aSAndrew Lunn default: 12721323061aSAndrew Lunn return -EOPNOTSUPP; 12731323061aSAndrew Lunn } 12741323061aSAndrew Lunn 12751323061aSAndrew Lunn return -EOPNOTSUPP; 12761323061aSAndrew Lunn } 12771323061aSAndrew Lunn 12781323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 12791323061aSAndrew Lunn u32 attr, int channel, long *value) 12801323061aSAndrew Lunn { 12811323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 12821323061aSAndrew Lunn 12831323061aSAndrew Lunn switch (type) { 12841323061aSAndrew Lunn case hwmon_temp: 12851323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 12861323061aSAndrew Lunn case hwmon_in: 12871323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 12881323061aSAndrew Lunn case hwmon_curr: 12891323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 12901323061aSAndrew Lunn case hwmon_power: 12911323061aSAndrew Lunn switch (channel) { 12921323061aSAndrew Lunn case 0: 12931323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 12941323061aSAndrew Lunn case 1: 12951323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 12961323061aSAndrew Lunn default: 12971323061aSAndrew Lunn return -EOPNOTSUPP; 12981323061aSAndrew Lunn } 12991323061aSAndrew Lunn default: 13001323061aSAndrew Lunn return -EOPNOTSUPP; 13011323061aSAndrew Lunn } 13021323061aSAndrew Lunn } 13031323061aSAndrew Lunn 1304c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1305c1236979SAndrew Lunn "TX_power", 1306c1236979SAndrew Lunn "RX_power", 1307c1236979SAndrew Lunn }; 1308c1236979SAndrew Lunn 1309c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1310c1236979SAndrew Lunn enum hwmon_sensor_types type, 1311c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1312c1236979SAndrew Lunn { 1313c1236979SAndrew Lunn switch (type) { 1314c1236979SAndrew Lunn case hwmon_curr: 1315c1236979SAndrew Lunn switch (attr) { 1316c1236979SAndrew Lunn case hwmon_curr_label: 1317c1236979SAndrew Lunn *str = "bias"; 1318c1236979SAndrew Lunn return 0; 1319c1236979SAndrew Lunn default: 1320c1236979SAndrew Lunn return -EOPNOTSUPP; 1321c1236979SAndrew Lunn } 1322c1236979SAndrew Lunn break; 1323c1236979SAndrew Lunn case hwmon_temp: 1324c1236979SAndrew Lunn switch (attr) { 1325c1236979SAndrew Lunn case hwmon_temp_label: 1326c1236979SAndrew Lunn *str = "temperature"; 1327c1236979SAndrew Lunn return 0; 1328c1236979SAndrew Lunn default: 1329c1236979SAndrew Lunn return -EOPNOTSUPP; 1330c1236979SAndrew Lunn } 1331c1236979SAndrew Lunn break; 1332c1236979SAndrew Lunn case hwmon_in: 1333c1236979SAndrew Lunn switch (attr) { 1334c1236979SAndrew Lunn case hwmon_in_label: 1335c1236979SAndrew Lunn *str = "VCC"; 1336c1236979SAndrew Lunn return 0; 1337c1236979SAndrew Lunn default: 1338c1236979SAndrew Lunn return -EOPNOTSUPP; 1339c1236979SAndrew Lunn } 1340c1236979SAndrew Lunn break; 1341c1236979SAndrew Lunn case hwmon_power: 1342c1236979SAndrew Lunn switch (attr) { 1343c1236979SAndrew Lunn case hwmon_power_label: 1344c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1345c1236979SAndrew Lunn return 0; 1346c1236979SAndrew Lunn default: 1347c1236979SAndrew Lunn return -EOPNOTSUPP; 1348c1236979SAndrew Lunn } 1349c1236979SAndrew Lunn break; 1350c1236979SAndrew Lunn default: 1351c1236979SAndrew Lunn return -EOPNOTSUPP; 1352c1236979SAndrew Lunn } 1353c1236979SAndrew Lunn 1354c1236979SAndrew Lunn return -EOPNOTSUPP; 1355c1236979SAndrew Lunn } 1356c1236979SAndrew Lunn 13571323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 13581323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 13591323061aSAndrew Lunn .read = sfp_hwmon_read, 1360c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 13611323061aSAndrew Lunn }; 13621323061aSAndrew Lunn 1363815f5f57SBeniamin Sandu static const struct hwmon_channel_info *sfp_hwmon_info[] = { 1364815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1365815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1366815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 13671323061aSAndrew Lunn HWMON_I_INPUT | 13681323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 13691323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 13701323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1371c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1372815f5f57SBeniamin Sandu HWMON_I_LABEL), 1373815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1374815f5f57SBeniamin Sandu HWMON_T_INPUT | 1375815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1376815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1377815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1378815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1379815f5f57SBeniamin Sandu HWMON_T_LABEL), 1380815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 13811323061aSAndrew Lunn HWMON_C_INPUT | 13821323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 13831323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 13841323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1385c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1386815f5f57SBeniamin Sandu HWMON_C_LABEL), 1387815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 13881323061aSAndrew Lunn /* Transmit power */ 13891323061aSAndrew Lunn HWMON_P_INPUT | 13901323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 13911323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 13921323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1393c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1394c1236979SAndrew Lunn HWMON_P_LABEL, 13951323061aSAndrew Lunn /* Receive power */ 13961323061aSAndrew Lunn HWMON_P_INPUT | 13971323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 13981323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 13991323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1400c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1401815f5f57SBeniamin Sandu HWMON_P_LABEL), 14021323061aSAndrew Lunn NULL, 14031323061aSAndrew Lunn }; 14041323061aSAndrew Lunn 14051323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 14061323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 14071323061aSAndrew Lunn .info = sfp_hwmon_info, 14081323061aSAndrew Lunn }; 14091323061aSAndrew Lunn 1410139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 14111323061aSAndrew Lunn { 1412139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 14133f118c44SMichael Walle int err; 14141323061aSAndrew Lunn 1415426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1416426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1417426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1418426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1419426c6cbcSPali Rohár * skip registration of hwmon device. 1420426c6cbcSPali Rohár */ 1421426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1422426c6cbcSPali Rohár dev_info(sfp->dev, 1423426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1424426c6cbcSPali Rohár dev_info(sfp->dev, 1425426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1426426c6cbcSPali Rohár return; 1427426c6cbcSPali Rohár } 1428426c6cbcSPali Rohár 1429139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1430139d3a21SRussell King if (err < 0) { 1431139d3a21SRussell King if (sfp->hwmon_tries--) { 1432139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1433139d3a21SRussell King T_PROBE_RETRY_SLOW); 1434139d3a21SRussell King } else { 14359ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 14369ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1437139d3a21SRussell King } 1438139d3a21SRussell King return; 1439139d3a21SRussell King } 1440139d3a21SRussell King 14413f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 14423f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1443139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1444139d3a21SRussell King return; 1445139d3a21SRussell King } 1446139d3a21SRussell King 1447139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1448139d3a21SRussell King sfp->hwmon_name, sfp, 1449139d3a21SRussell King &sfp_hwmon_chip_info, 1450139d3a21SRussell King NULL); 1451139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1452139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1453139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1454139d3a21SRussell King } 1455139d3a21SRussell King 1456139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1457139d3a21SRussell King { 14581323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 14591323061aSAndrew Lunn return 0; 14601323061aSAndrew Lunn 14611323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 14621323061aSAndrew Lunn return 0; 14631323061aSAndrew Lunn 14641323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 14651323061aSAndrew Lunn /* This driver in general does not support address 14661323061aSAndrew Lunn * change. 14671323061aSAndrew Lunn */ 14681323061aSAndrew Lunn return 0; 14691323061aSAndrew Lunn 1470139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1471139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 14721323061aSAndrew Lunn 1473139d3a21SRussell King return 0; 14741323061aSAndrew Lunn } 14751323061aSAndrew Lunn 14761323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 14771323061aSAndrew Lunn { 1478139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 14793e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 14801323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 14813e322474SAndrew Lunn sfp->hwmon_dev = NULL; 14821323061aSAndrew Lunn kfree(sfp->hwmon_name); 14831323061aSAndrew Lunn } 14843e322474SAndrew Lunn } 1485139d3a21SRussell King 1486139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1487139d3a21SRussell King { 1488139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1489139d3a21SRussell King 1490139d3a21SRussell King return 0; 1491139d3a21SRussell King } 1492139d3a21SRussell King 1493139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1494139d3a21SRussell King { 1495139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1496139d3a21SRussell King } 14971323061aSAndrew Lunn #else 14981323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 14991323061aSAndrew Lunn { 15001323061aSAndrew Lunn return 0; 15011323061aSAndrew Lunn } 15021323061aSAndrew Lunn 15031323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15041323061aSAndrew Lunn { 15051323061aSAndrew Lunn } 1506139d3a21SRussell King 1507139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1508139d3a21SRussell King { 1509139d3a21SRussell King return 0; 1510139d3a21SRussell King } 1511139d3a21SRussell King 1512139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1513139d3a21SRussell King { 1514139d3a21SRussell King } 15151323061aSAndrew Lunn #endif 15161323061aSAndrew Lunn 151773970055SRussell King /* Helpers */ 151873970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 151973970055SRussell King { 152073970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 152173970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 152273970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 152373970055SRussell King sfp_set_state(sfp, sfp->state); 152473970055SRussell King } 152573970055SRussell King 152673970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 152773970055SRussell King { 152873970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 152973970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 153073970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 153173970055SRussell King sfp_set_state(sfp, sfp->state); 153273970055SRussell King } 153373970055SRussell King 15349cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 15359cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 15369cc8976cSRussell King { 15379cc8976cSRussell King struct sfp *sfp = s->private; 15389cc8976cSRussell King 15399cc8976cSRussell King seq_printf(s, "Module state: %s\n", 15409cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 15419cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 15429cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 15439cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 15449cc8976cSRussell King seq_printf(s, "Device state: %s\n", 15459cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 15469cc8976cSRussell King seq_printf(s, "Main state: %s\n", 15479cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 15489cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 15499cc8976cSRussell King sfp->sm_fault_retries); 15509cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 15519cc8976cSRussell King sfp->sm_phy_retries); 15529cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 15539cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 15549cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 15559cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 15569cc8976cSRussell King return 0; 15579cc8976cSRussell King } 15589cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 15599cc8976cSRussell King 15609cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15619cc8976cSRussell King { 15629cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 15639cc8976cSRussell King 15649cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 15659cc8976cSRussell King &sfp_debug_state_fops); 15669cc8976cSRussell King } 15679cc8976cSRussell King 15689cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15699cc8976cSRussell King { 15709cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 15719cc8976cSRussell King } 15729cc8976cSRussell King #else 15739cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15749cc8976cSRussell King { 15759cc8976cSRussell King } 15769cc8976cSRussell King 15779cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15789cc8976cSRussell King { 15799cc8976cSRussell King } 15809cc8976cSRussell King #endif 15819cc8976cSRussell King 158273970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 158373970055SRussell King { 158473970055SRussell King unsigned int state = sfp->state; 158573970055SRussell King 158673970055SRussell King if (state & SFP_F_TX_DISABLE) 158773970055SRussell King return; 158873970055SRussell King 158973970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 159073970055SRussell King 159173970055SRussell King udelay(T_RESET_US); 159273970055SRussell King 159373970055SRussell King sfp_set_state(sfp, state); 159473970055SRussell King } 159573970055SRussell King 159673970055SRussell King /* SFP state machine */ 159773970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 159873970055SRussell King { 159973970055SRussell King if (timeout) 160073970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 160173970055SRussell King timeout); 160273970055SRussell King else 160373970055SRussell King cancel_delayed_work(&sfp->timeout); 160473970055SRussell King } 160573970055SRussell King 160673970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 160773970055SRussell King unsigned int timeout) 160873970055SRussell King { 160973970055SRussell King sfp->sm_state = state; 161073970055SRussell King sfp_sm_set_timer(sfp, timeout); 161173970055SRussell King } 161273970055SRussell King 16130936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1614516b29edSFlorian Fainelli unsigned int timeout) 161573970055SRussell King { 161673970055SRussell King sfp->sm_mod_state = state; 161773970055SRussell King sfp_sm_set_timer(sfp, timeout); 161873970055SRussell King } 161973970055SRussell King 162073970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 162173970055SRussell King { 162273970055SRussell King sfp_remove_phy(sfp->sfp_bus); 162373970055SRussell King phy_device_remove(sfp->mod_phy); 162473970055SRussell King phy_device_free(sfp->mod_phy); 162573970055SRussell King sfp->mod_phy = NULL; 162673970055SRussell King } 162773970055SRussell King 1628324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 162973970055SRussell King { 163073970055SRussell King struct phy_device *phy; 163173970055SRussell King int err; 163273970055SRussell King 1633324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 16341cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 16351cb89a14SRussell King return PTR_ERR(phy); 163620b56ed9SRussell King if (IS_ERR(phy)) { 16379ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1638256e43cbSRussell King return PTR_ERR(phy); 163973970055SRussell King } 164073970055SRussell King 16419a484621SRussell King err = phy_device_register(phy); 16429a484621SRussell King if (err) { 16439a484621SRussell King phy_device_free(phy); 16449ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 16459ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1646256e43cbSRussell King return err; 16479a484621SRussell King } 16489a484621SRussell King 164973970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 165073970055SRussell King if (err) { 165173970055SRussell King phy_device_remove(phy); 165273970055SRussell King phy_device_free(phy); 16539ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1654256e43cbSRussell King return err; 165573970055SRussell King } 165673970055SRussell King 165773970055SRussell King sfp->mod_phy = phy; 1658256e43cbSRussell King 1659256e43cbSRussell King return 0; 166073970055SRussell King } 166173970055SRussell King 166273970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 166373970055SRussell King { 166473970055SRussell King sfp_link_up(sfp->sfp_bus); 166573970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 166673970055SRussell King } 166773970055SRussell King 166873970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 166973970055SRussell King { 167073970055SRussell King sfp_link_down(sfp->sfp_bus); 167173970055SRussell King } 167273970055SRussell King 167373970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 167473970055SRussell King { 1675624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1676624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1677624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1678624407d2SRussell King bool los = false; 167973970055SRussell King 1680710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1681624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1682624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 168373970055SRussell King */ 1684624407d2SRussell King if (los_options == los_inverted) 1685624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1686624407d2SRussell King else if (los_options == los_normal) 1687624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 168873970055SRussell King 168973970055SRussell King if (los) 169073970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 169173970055SRussell King else 169273970055SRussell King sfp_sm_link_up(sfp); 169373970055SRussell King } 169473970055SRussell King 1695710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1696710dfbb0SRussell King { 1697624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1698624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1699624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1700624407d2SRussell King 1701624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1702624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1703710dfbb0SRussell King } 1704710dfbb0SRussell King 1705710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1706710dfbb0SRussell King { 1707624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1708624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1709624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1710624407d2SRussell King 1711624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1712624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1713710dfbb0SRussell King } 1714710dfbb0SRussell King 171563ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 171673970055SRussell King { 1717281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1718516b29edSFlorian Fainelli dev_err(sfp->dev, 1719516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 172073970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 172173970055SRussell King } else { 172273970055SRussell King if (warn) 172373970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 172473970055SRussell King 172563ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 172673970055SRussell King } 172773970055SRussell King } 172873970055SRussell King 1729e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1730e85b1347SMarek Behún { 1731e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1732e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1733e85b1347SMarek Behún 1734e85b1347SMarek Behún return 0; 1735e85b1347SMarek Behún } 1736e85b1347SMarek Behún 17379a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 17389a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 17399a484621SRussell King * or clause 45 PHY. 17409a484621SRussell King * 17419a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 17429a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 17439a484621SRussell King * PHY driver to determine. 17449a484621SRussell King * 17459a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 17469a484621SRussell King * mode according to the negotiated line speed. 17479a484621SRussell King */ 1748256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1749181f29daSRussell King { 1750256e43cbSRussell King int err = 0; 1751256e43cbSRussell King 1752e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1753e85b1347SMarek Behún case MDIO_I2C_NONE: 17549a484621SRussell King break; 17559a484621SRussell King 1756e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1757324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 17589a484621SRussell King break; 1759e85b1347SMarek Behún 1760e85b1347SMarek Behún case MDIO_I2C_C45: 1761324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1762e85b1347SMarek Behún break; 176309bbedacSMarek Behún 176409bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1765324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 176609bbedacSMarek Behún break; 17679a484621SRussell King } 1768e85b1347SMarek Behún 1769256e43cbSRussell King return err; 177073970055SRussell King } 177173970055SRussell King 1772ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 17733bb35261SJon Nettleton { 1774ed32abb1SRussell King u32 power_mW = 1000; 17755765cee1SRussell King (Oracle) bool supports_a2; 17763bb35261SJon Nettleton 177718cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 177818cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1779ed32abb1SRussell King power_mW = 1500; 1780f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1781f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1782f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1783ed32abb1SRussell King power_mW = 2000; 17843bb35261SJon Nettleton 178502eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 178602eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 178702eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 178802eaf5a7SRussell King (Oracle) return 0; 178902eaf5a7SRussell King (Oracle) } 179002eaf5a7SRussell King (Oracle) 17915765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 17925765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 17935765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 17945765cee1SRussell King (Oracle) 1795ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 17967cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 17975765cee1SRussell King (Oracle) if (!supports_a2) { 17987cfa9c92SRussell King /* The module appears not to implement bus address 17997cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 18007cfa9c92SRussell King * indicated mode. 18017cfa9c92SRussell King */ 18023bb35261SJon Nettleton dev_err(sfp->dev, 18033bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1804ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18053bb35261SJon Nettleton return -EINVAL; 18067cfa9c92SRussell King } else { 18073bb35261SJon Nettleton dev_warn(sfp->dev, 18083bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1809ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18103bb35261SJon Nettleton return 0; 18113bb35261SJon Nettleton } 18127cfa9c92SRussell King } 18137cfa9c92SRussell King 18145765cee1SRussell King (Oracle) if (!supports_a2) { 18155765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 18165765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 18175765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 18185765cee1SRussell King (Oracle) */ 18195765cee1SRussell King (Oracle) return 0; 18205765cee1SRussell King (Oracle) } 18215765cee1SRussell King (Oracle) 18227cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 18237cfa9c92SRussell King * an address change sequence, warn the user that the module may 18247cfa9c92SRussell King * not be functional. 18257cfa9c92SRussell King */ 18265765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 18277cfa9c92SRussell King dev_warn(sfp->dev, 182807f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 18297cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 18307cfa9c92SRussell King return 0; 18317cfa9c92SRussell King } 18323bb35261SJon Nettleton 1833ed32abb1SRussell King sfp->module_power_mW = power_mW; 1834ed32abb1SRussell King 1835ed32abb1SRussell King return 0; 1836ed32abb1SRussell King } 1837ed32abb1SRussell King 1838b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1839ed32abb1SRussell King { 1840ed32abb1SRussell King int err; 1841ed32abb1SRussell King 1842*bd1432f6SRussell King (Oracle) err = sfp_modify_u8(sfp, true, SFP_EXT_STATUS, 1843*bd1432f6SRussell King (Oracle) SFP_EXT_STATUS_PWRLVL_SELECT, 1844*bd1432f6SRussell King (Oracle) enable ? SFP_EXT_STATUS_PWRLVL_SELECT : 0); 1845*bd1432f6SRussell King (Oracle) if (err != sizeof(u8)) { 1846*bd1432f6SRussell King (Oracle) dev_err(sfp->dev, "failed to %sable high power: %pe\n", 1847*bd1432f6SRussell King (Oracle) enable ? "en" : "dis", ERR_PTR(err)); 1848b036a554SRussell King return -EAGAIN; 18493bb35261SJon Nettleton } 18503bb35261SJon Nettleton 1851b036a554SRussell King if (enable) 18523bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1853ed32abb1SRussell King sfp->module_power_mW / 1000, 1854ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 18553bb35261SJon Nettleton 1856b036a554SRussell King return 0; 18573bb35261SJon Nettleton } 18583bb35261SJon Nettleton 1859426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1860426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1861426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1862426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1863426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1864426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1865426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1866426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1867426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1868426c6cbcSPali Rohár * at a time. 18690d035bedSRussell King */ 1870426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 18710d035bedSRussell King { 1872426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 18730d035bedSRussell King 1874426c6cbcSPali Rohár /* Already using byte IO */ 1875426c6cbcSPali Rohár if (block_size == 1) 1876426c6cbcSPali Rohár return false; 1877426c6cbcSPali Rohár 1878426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1879426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1880426c6cbcSPali Rohár return false; 18810d035bedSRussell King } 1882426c6cbcSPali Rohár return true; 18830d035bedSRussell King } 18840d035bedSRussell King 1885b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1886b18432c5SChris Healy { 1887b18432c5SChris Healy u8 check; 1888b18432c5SChris Healy int err; 1889b18432c5SChris Healy 1890b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1891b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1892b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1893b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1894b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1895b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1896b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1897b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1898b18432c5SChris Healy if (err != 3) { 18999ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19009ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 19019ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1902b18432c5SChris Healy return err; 1903b18432c5SChris Healy } 1904b18432c5SChris Healy 1905b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1906b18432c5SChris Healy mdelay(50); 1907b18432c5SChris Healy 1908b18432c5SChris Healy /* Update base structure checksum */ 1909b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1910b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1911b18432c5SChris Healy if (err != 1) { 19129ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19139ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 19149ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1915b18432c5SChris Healy return err; 1916b18432c5SChris Healy } 1917b18432c5SChris Healy } 1918b18432c5SChris Healy return 0; 1919b18432c5SChris Healy } 1920b18432c5SChris Healy 1921e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 192273970055SRussell King { 192373970055SRussell King /* SFP module inserted - read I2C data */ 192473970055SRussell King struct sfp_eeprom_id id; 1925b18432c5SChris Healy bool cotsworks_sfbg; 1926981f1f80SRussell King bool cotsworks; 192773970055SRussell King u8 check; 19283bb35261SJon Nettleton int ret; 192973970055SRussell King 1930426c6cbcSPali Rohár /* Some SFP modules and also some Linux I2C drivers do not like reads 1931426c6cbcSPali Rohár * longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at 1932426c6cbcSPali Rohár * a time. 19330d035bedSRussell King */ 1934426c6cbcSPali Rohár sfp->i2c_block_size = 16; 19350d035bedSRussell King 19360d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 19373bb35261SJon Nettleton if (ret < 0) { 1938e117be74SRussell King if (report) 19399ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 19409ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 194173970055SRussell King return -EAGAIN; 194273970055SRussell King } 194373970055SRussell King 19440d035bedSRussell King if (ret != sizeof(id.base)) { 19459ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 194673970055SRussell King return -EAGAIN; 194773970055SRussell King } 194873970055SRussell King 1949426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1950426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1951426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1952426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1953426c6cbcSPali Rohár * is really required and we have no other option. 1954426c6cbcSPali Rohár */ 1955426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1956426c6cbcSPali Rohár dev_info(sfp->dev, 1957426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1958426c6cbcSPali Rohár dev_info(sfp->dev, 1959426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1960426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1961426c6cbcSPali Rohár 1962426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1963426c6cbcSPali Rohár if (ret < 0) { 1964426c6cbcSPali Rohár if (report) 19659ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19669ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 19679ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1968426c6cbcSPali Rohár return -EAGAIN; 1969426c6cbcSPali Rohár } 1970426c6cbcSPali Rohár 1971426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 19729ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 19739ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1974426c6cbcSPali Rohár return -EAGAIN; 1975426c6cbcSPali Rohár } 1976426c6cbcSPali Rohár } 1977426c6cbcSPali Rohár 1978981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1979981f1f80SRussell King * do the final programming with the final module part number, 1980981f1f80SRussell King * serial number and date code. 1981981f1f80SRussell King */ 1982981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1983b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1984b18432c5SChris Healy 1985b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1986b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1987b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1988b18432c5SChris Healy */ 1989b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1990b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1991b18432c5SChris Healy if (ret < 0) 1992b18432c5SChris Healy return ret; 1993b18432c5SChris Healy } 1994981f1f80SRussell King 199573970055SRussell King /* Validate the checksum over the base structure */ 199673970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 199773970055SRussell King if (check != id.base.cc_base) { 1998981f1f80SRussell King if (cotsworks) { 1999981f1f80SRussell King dev_warn(sfp->dev, 2000981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 2001981f1f80SRussell King check, id.base.cc_base); 2002981f1f80SRussell King } else { 200373970055SRussell King dev_err(sfp->dev, 2004981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2005981f1f80SRussell King check, id.base.cc_base); 200673970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2007981f1f80SRussell King 16, 1, &id, sizeof(id), true); 200873970055SRussell King return -EINVAL; 200973970055SRussell King } 2010981f1f80SRussell King } 201173970055SRussell King 20120d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 20130d035bedSRussell King if (ret < 0) { 20140d035bedSRussell King if (report) 20159ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 20169ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 20170d035bedSRussell King return -EAGAIN; 20180d035bedSRussell King } 20190d035bedSRussell King 20200d035bedSRussell King if (ret != sizeof(id.ext)) { 20219ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 20220d035bedSRussell King return -EAGAIN; 20230d035bedSRussell King } 20240d035bedSRussell King 202573970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 202673970055SRussell King if (check != id.ext.cc_ext) { 2027981f1f80SRussell King if (cotsworks) { 2028981f1f80SRussell King dev_warn(sfp->dev, 2029981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2030981f1f80SRussell King check, id.ext.cc_ext); 2031981f1f80SRussell King } else { 203273970055SRussell King dev_err(sfp->dev, 2033981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2034981f1f80SRussell King check, id.ext.cc_ext); 2035981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2036981f1f80SRussell King 16, 1, &id, sizeof(id), true); 203773970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 203873970055SRussell King } 2039981f1f80SRussell King } 204073970055SRussell King 204173970055SRussell King sfp->id = id; 204273970055SRussell King 2043a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2044a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2045a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2046a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2047a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2048a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 204973970055SRussell King 2050259c8618SRussell King /* Check whether we support this module */ 2051f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2052259c8618SRussell King dev_err(sfp->dev, 2053259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 205473970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 205573970055SRussell King return -EINVAL; 205673970055SRussell King } 205773970055SRussell King 2058ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 2059ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 2060ec7681bdSRussell King dev_warn(sfp->dev, 2061ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 2062ec7681bdSRussell King 2063ed32abb1SRussell King /* Parse the module power requirement */ 2064ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2065ed32abb1SRussell King if (ret < 0) 2066ed32abb1SRussell King return ret; 2067ed32abb1SRussell King 20688475c4b7SRussell King (Oracle) /* Initialise state bits to use from hardware */ 20698475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 20708475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 20718475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_DISABLE; 20728475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 20738475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_FAULT; 20748475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 20758475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_LOS; 20768475c4b7SRussell King (Oracle) 207726c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2078324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 207926c97a2dSRussell King 20802069624dSMatthew Hagan sfp->tx_fault_ignore = false; 20812069624dSMatthew Hagan 2082e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2083e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2084e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2085e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2086e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2087e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2088e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2089e85b1347SMarek Behún else 2090e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2091e85b1347SMarek Behún 209223571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 209327541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 209427541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 209523571c7bSRussell King (Oracle) 2096b036a554SRussell King return 0; 209773970055SRussell King } 209873970055SRussell King 209973970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 210073970055SRussell King { 210173f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 210273970055SRussell King sfp_module_remove(sfp->sfp_bus); 210373970055SRussell King 21041323061aSAndrew Lunn sfp_hwmon_remove(sfp); 21051323061aSAndrew Lunn 210673970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2107ed32abb1SRussell King sfp->module_power_mW = 0; 210873970055SRussell King 210973970055SRussell King dev_info(sfp->dev, "module removed\n"); 211073970055SRussell King } 211173970055SRussell King 21126b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2113e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 211473970055SRussell King { 2115e85d81a1SRussell King switch (sfp->sm_dev_state) { 2116e85d81a1SRussell King default: 21176b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 21186b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 21196b0da5c9SRussell King break; 21206b0da5c9SRussell King 21216b0da5c9SRussell King case SFP_DEV_DOWN: 21226b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21236b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21246b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2125e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2126e85d81a1SRussell King break; 212773970055SRussell King 2128e85d81a1SRussell King case SFP_DEV_UP: 21296b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21306b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21316b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2132e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2133e85d81a1SRussell King break; 2134e85d81a1SRussell King } 2135e85d81a1SRussell King } 213673970055SRussell King 2137d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2138d900954fSRussell King * the on-board EEPROM, and sets up the power level. 213973970055SRussell King */ 2140e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2141e85d81a1SRussell King { 2142b036a554SRussell King int err; 2143b036a554SRussell King 2144b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2145b036a554SRussell King if (event == SFP_E_REMOVE) { 2146d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2147d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2148b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2149b036a554SRussell King return; 2150b036a554SRussell King } 2151b036a554SRussell King 2152b036a554SRussell King /* Handle device detach globally */ 215373f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 215473f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2155b036a554SRussell King if (sfp->module_power_mW > 1000 && 2156b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2157b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 215873f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2159d2e816c0SRussell King return; 2160d2e816c0SRussell King } 2161d2e816c0SRussell King 216273970055SRussell King switch (sfp->sm_mod_state) { 216373970055SRussell King default: 2164e117be74SRussell King if (event == SFP_E_INSERT) { 2165d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2166e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2167e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2168e117be74SRussell King } 216973970055SRussell King break; 217073970055SRussell King 217173970055SRussell King case SFP_MOD_PROBE: 217273f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2173b036a554SRussell King if (event != SFP_E_TIMEOUT) 2174b036a554SRussell King break; 217573970055SRussell King 2176e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2177b036a554SRussell King if (err == -EAGAIN) { 2178e117be74SRussell King if (sfp->sm_mod_tries_init && 2179e117be74SRussell King --sfp->sm_mod_tries_init) { 2180e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2181b036a554SRussell King break; 2182e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2183e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2184e117be74SRussell King dev_warn(sfp->dev, 2185e117be74SRussell King "please wait, module slow to respond\n"); 2186e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2187e117be74SRussell King break; 2188e117be74SRussell King } 2189b036a554SRussell King } 2190b036a554SRussell King if (err < 0) { 2191b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2192b036a554SRussell King break; 2193b036a554SRussell King } 2194b036a554SRussell King 219538ecd706SRussell King err = sfp_hwmon_insert(sfp); 219638ecd706SRussell King if (err) 21979ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 21989ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 219938ecd706SRussell King 220073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2201df561f66SGustavo A. R. Silva fallthrough; 220273f5e847SRussell King case SFP_MOD_WAITDEV: 220373f5e847SRussell King /* Ensure that the device is attached before proceeding */ 220473f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 220573f5e847SRussell King break; 220673f5e847SRussell King 220773f5e847SRussell King /* Report the module insertion to the upstream device */ 220823571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 220923571c7bSRussell King (Oracle) sfp->quirk); 221073f5e847SRussell King if (err < 0) { 221173f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 221273f5e847SRussell King break; 221373f5e847SRussell King } 221473f5e847SRussell King 2215b036a554SRussell King /* If this is a power level 1 module, we are done */ 2216b036a554SRussell King if (sfp->module_power_mW <= 1000) 2217b036a554SRussell King goto insert; 2218b036a554SRussell King 2219b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2220df561f66SGustavo A. R. Silva fallthrough; 2221b036a554SRussell King case SFP_MOD_HPOWER: 2222b036a554SRussell King /* Enable high power mode */ 2223b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 222473f5e847SRussell King if (err < 0) { 222573f5e847SRussell King if (err != -EAGAIN) { 222673f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 22270936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 222873f5e847SRussell King } else { 2229e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 223073f5e847SRussell King } 223173f5e847SRussell King break; 223273f5e847SRussell King } 223373f5e847SRussell King 223473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 223573970055SRussell King break; 223673970055SRussell King 2237b036a554SRussell King case SFP_MOD_WAITPWR: 2238b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2239b036a554SRussell King if (event != SFP_E_TIMEOUT) 2240b036a554SRussell King break; 2241b036a554SRussell King 2242b036a554SRussell King insert: 22430936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 22443bb35261SJon Nettleton break; 2245b036a554SRussell King 224673970055SRussell King case SFP_MOD_PRESENT: 224773970055SRussell King case SFP_MOD_ERROR: 224873970055SRussell King break; 224973970055SRussell King } 225073970055SRussell King } 225173970055SRussell King 2252e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2253e85d81a1SRussell King { 2254eefa6f1fSRussell King unsigned long timeout; 22551cb89a14SRussell King int ret; 2256eefa6f1fSRussell King 225773970055SRussell King /* Some events are global */ 225873970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 225973970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 226073970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 226173970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 226273970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 226373970055SRussell King sfp_sm_link_down(sfp); 226474c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 226574c551caSRussell King sfp_module_stop(sfp->sfp_bus); 226673970055SRussell King if (sfp->mod_phy) 226773970055SRussell King sfp_sm_phy_detach(sfp); 2268e85b1347SMarek Behún if (sfp->i2c_mii) 2269e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 22701539e0d3SRussell King sfp_module_tx_disable(sfp); 2271f3c9a666SRussell King sfp_soft_stop_poll(sfp); 227273970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 227373970055SRussell King return; 227473970055SRussell King } 227573970055SRussell King 227673970055SRussell King /* The main state machine */ 227773970055SRussell King switch (sfp->sm_state) { 227873970055SRussell King case SFP_S_DOWN: 2279eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2280eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2281eefa6f1fSRussell King break; 2282eefa6f1fSRussell King 2283f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2284f3c9a666SRussell King sfp_soft_start_poll(sfp); 2285f3c9a666SRussell King 2286f3c9a666SRussell King sfp_module_tx_enable(sfp); 2287eefa6f1fSRussell King 2288eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2289281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2290eefa6f1fSRussell King 2291eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2292eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2293324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2294324e88cbSMarek Behún * specific modules). 2295eefa6f1fSRussell King */ 2296324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2297eefa6f1fSRussell King break; 2298eefa6f1fSRussell King 2299eefa6f1fSRussell King case SFP_S_WAIT: 2300eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2301eefa6f1fSRussell King break; 2302eefa6f1fSRussell King 2303eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 230426c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 230526c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 230626c97a2dSRussell King * initialise, which is indicated by TX_FAULT 230726c97a2dSRussell King * deasserting. 2308181f29daSRussell King */ 230926c97a2dSRussell King timeout = sfp->module_t_start_up; 2310324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2311324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2312eefa6f1fSRussell King else 2313eefa6f1fSRussell King timeout = 1; 2314eefa6f1fSRussell King 2315eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2316eefa6f1fSRussell King } else { 2317eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2318eefa6f1fSRussell King * finished initialising. 2319eefa6f1fSRussell King */ 2320eefa6f1fSRussell King goto init_done; 2321181f29daSRussell King } 232273970055SRussell King break; 232373970055SRussell King 232473970055SRussell King case SFP_S_INIT: 2325d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2326e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 232726c97a2dSRussell King * or t_start_up, so assume there is a fault. 2328d23751a0SRussell King */ 2329d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2330281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2331d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 23321cb89a14SRussell King init_done: 2333e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2334e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2335e85b1347SMarek Behún if (ret < 0) { 2336e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2337e85b1347SMarek Behún break; 2338e85b1347SMarek Behún } 23391cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 23401cb89a14SRussell King goto phy_probe; 23411cb89a14SRussell King } 23421cb89a14SRussell King break; 23431cb89a14SRussell King 23441cb89a14SRussell King case SFP_S_INIT_PHY: 23451cb89a14SRussell King if (event != SFP_E_TIMEOUT) 23461cb89a14SRussell King break; 23471cb89a14SRussell King phy_probe: 23481cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2349d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2350d23751a0SRussell King */ 23511cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 23521cb89a14SRussell King if (ret == -ENODEV) { 23531cb89a14SRussell King if (--sfp->sm_phy_retries) { 23541cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 23551cb89a14SRussell King break; 23561cb89a14SRussell King } else { 23571cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 23581cb89a14SRussell King } 23591cb89a14SRussell King } else if (ret) { 2360256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2361256e43cbSRussell King break; 2362256e43cbSRussell King } 236374c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 236474c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 236574c551caSRussell King break; 236674c551caSRussell King } 2367d23751a0SRussell King sfp_sm_link_check_los(sfp); 2368d23751a0SRussell King 2369d23751a0SRussell King /* Reset the fault retry count */ 2370281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2371d23751a0SRussell King break; 2372d23751a0SRussell King 2373d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2374d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2375d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 237626c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2377d23751a0SRussell King } 237873970055SRussell King break; 237973970055SRussell King 238073970055SRussell King case SFP_S_WAIT_LOS: 238173970055SRussell King if (event == SFP_E_TX_FAULT) 238263ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2383710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 238473970055SRussell King sfp_sm_link_up(sfp); 238573970055SRussell King break; 238673970055SRussell King 238773970055SRussell King case SFP_S_LINK_UP: 238873970055SRussell King if (event == SFP_E_TX_FAULT) { 238973970055SRussell King sfp_sm_link_down(sfp); 239063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2391710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 239273970055SRussell King sfp_sm_link_down(sfp); 239373970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 239473970055SRussell King } 239573970055SRussell King break; 239673970055SRussell King 239773970055SRussell King case SFP_S_TX_FAULT: 239873970055SRussell King if (event == SFP_E_TIMEOUT) { 239973970055SRussell King sfp_module_tx_fault_reset(sfp); 240026c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 240173970055SRussell King } 240273970055SRussell King break; 240373970055SRussell King 240473970055SRussell King case SFP_S_REINIT: 240573970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 240663ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 240773970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 240873970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 240973970055SRussell King sfp_sm_link_check_los(sfp); 241073970055SRussell King } 241173970055SRussell King break; 241273970055SRussell King 241373970055SRussell King case SFP_S_TX_DISABLE: 241473970055SRussell King break; 241573970055SRussell King } 2416e85d81a1SRussell King } 2417e85d81a1SRussell King 2418e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2419e85d81a1SRussell King { 2420e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2421e85d81a1SRussell King 2422e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2423e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2424e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2425e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2426e85d81a1SRussell King event_to_str(event)); 2427e85d81a1SRussell King 2428e85d81a1SRussell King sfp_sm_device(sfp, event); 24296b0da5c9SRussell King sfp_sm_module(sfp, event); 2430e85d81a1SRussell King sfp_sm_main(sfp, event); 243173970055SRussell King 24324005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 24334005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 24344005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 24354005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 243673970055SRussell King 243773970055SRussell King mutex_unlock(&sfp->sm_mutex); 243873970055SRussell King } 243973970055SRussell King 2440b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2441b5bfc21aSRussell King { 24426b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2443b5bfc21aSRussell King } 2444b5bfc21aSRussell King 2445b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2446b5bfc21aSRussell King { 24476b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2448b5bfc21aSRussell King } 2449b5bfc21aSRussell King 245073970055SRussell King static void sfp_start(struct sfp *sfp) 245173970055SRussell King { 245273970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 245373970055SRussell King } 245473970055SRussell King 245573970055SRussell King static void sfp_stop(struct sfp *sfp) 245673970055SRussell King { 245773970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 245873970055SRussell King } 245973970055SRussell King 246073970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 246173970055SRussell King { 246273970055SRussell King /* locking... and check module is present */ 246373970055SRussell King 2464ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2465ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 246673970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 246773970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 246873970055SRussell King } else { 246973970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 247073970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 247173970055SRussell King } 247273970055SRussell King return 0; 247373970055SRussell King } 247473970055SRussell King 247573970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 247673970055SRussell King u8 *data) 247773970055SRussell King { 247873970055SRussell King unsigned int first, last, len; 247973970055SRussell King int ret; 248073970055SRussell King 248173970055SRussell King if (ee->len == 0) 248273970055SRussell King return -EINVAL; 248373970055SRussell King 248473970055SRussell King first = ee->offset; 248573970055SRussell King last = ee->offset + ee->len; 248673970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 248773970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 248873970055SRussell King len -= first; 248973970055SRussell King 24902794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 249173970055SRussell King if (ret < 0) 249273970055SRussell King return ret; 249373970055SRussell King 249473970055SRussell King first += len; 249573970055SRussell King data += len; 249673970055SRussell King } 24972794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 249873970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 249973970055SRussell King len -= first; 250073970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 250173970055SRussell King 25022794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 250373970055SRussell King if (ret < 0) 250473970055SRussell King return ret; 250573970055SRussell King } 250673970055SRussell King return 0; 250773970055SRussell King } 250873970055SRussell King 2509d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2510d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2511d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2512d740513fSAndrew Lunn { 2513d740513fSAndrew Lunn if (page->bank) { 2514d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2515d740513fSAndrew Lunn return -EOPNOTSUPP; 2516d740513fSAndrew Lunn } 2517d740513fSAndrew Lunn 2518d740513fSAndrew Lunn if (page->page) { 2519d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2520d740513fSAndrew Lunn return -EOPNOTSUPP; 2521d740513fSAndrew Lunn } 2522d740513fSAndrew Lunn 2523d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2524d740513fSAndrew Lunn page->i2c_address != 0x51) { 2525d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2526d740513fSAndrew Lunn return -EOPNOTSUPP; 2527d740513fSAndrew Lunn } 2528d740513fSAndrew Lunn 2529d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2530d740513fSAndrew Lunn page->data, page->length); 2531d740513fSAndrew Lunn }; 2532d740513fSAndrew Lunn 253373970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2534b5bfc21aSRussell King .attach = sfp_attach, 2535b5bfc21aSRussell King .detach = sfp_detach, 253673970055SRussell King .start = sfp_start, 253773970055SRussell King .stop = sfp_stop, 253873970055SRussell King .module_info = sfp_module_info, 253973970055SRussell King .module_eeprom = sfp_module_eeprom, 2540d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 254173970055SRussell King }; 254273970055SRussell King 254373970055SRussell King static void sfp_timeout(struct work_struct *work) 254473970055SRussell King { 254573970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 254673970055SRussell King 254773970055SRussell King rtnl_lock(); 254873970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 254973970055SRussell King rtnl_unlock(); 255073970055SRussell King } 255173970055SRussell King 255273970055SRussell King static void sfp_check_state(struct sfp *sfp) 255373970055SRussell King { 255473970055SRussell King unsigned int state, i, changed; 255573970055SRussell King 25562158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 255773970055SRussell King state = sfp_get_state(sfp); 255873970055SRussell King changed = state ^ sfp->state; 25592069624dSMatthew Hagan if (sfp->tx_fault_ignore) 25602069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 25612069624dSMatthew Hagan else 256273970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 256373970055SRussell King 256473970055SRussell King for (i = 0; i < GPIO_MAX; i++) 256573970055SRussell King if (changed & BIT(i)) 256673970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 256773970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 256873970055SRussell King 256973970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 257073970055SRussell King sfp->state = state; 257173970055SRussell King 257273970055SRussell King rtnl_lock(); 257373970055SRussell King if (changed & SFP_F_PRESENT) 257473970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 257573970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 257673970055SRussell King 257773970055SRussell King if (changed & SFP_F_TX_FAULT) 257873970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 257973970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 258073970055SRussell King 258173970055SRussell King if (changed & SFP_F_LOS) 258273970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 258373970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 258473970055SRussell King rtnl_unlock(); 25852158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 258673970055SRussell King } 258773970055SRussell King 258873970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 258973970055SRussell King { 259073970055SRussell King struct sfp *sfp = data; 259173970055SRussell King 259273970055SRussell King sfp_check_state(sfp); 259373970055SRussell King 259473970055SRussell King return IRQ_HANDLED; 259573970055SRussell King } 259673970055SRussell King 259773970055SRussell King static void sfp_poll(struct work_struct *work) 259873970055SRussell King { 259973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 260073970055SRussell King 260173970055SRussell King sfp_check_state(sfp); 2602f3c9a666SRussell King 2603f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2604f3c9a666SRussell King sfp->need_poll) 260573970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 260673970055SRussell King } 260773970055SRussell King 260873970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 260973970055SRussell King { 261073970055SRussell King struct sfp *sfp; 261173970055SRussell King 261273970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 261373970055SRussell King if (!sfp) 261473970055SRussell King return ERR_PTR(-ENOMEM); 261573970055SRussell King 261673970055SRussell King sfp->dev = dev; 261773970055SRussell King 261873970055SRussell King mutex_init(&sfp->sm_mutex); 26192158e856SRobert Hancock mutex_init(&sfp->st_mutex); 262073970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 262173970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 262273970055SRussell King 2623139d3a21SRussell King sfp_hwmon_init(sfp); 2624139d3a21SRussell King 262573970055SRussell King return sfp; 262673970055SRussell King } 262773970055SRussell King 262873970055SRussell King static void sfp_cleanup(void *data) 262973970055SRussell King { 263073970055SRussell King struct sfp *sfp = data; 263173970055SRussell King 2632139d3a21SRussell King sfp_hwmon_exit(sfp); 2633139d3a21SRussell King 263473970055SRussell King cancel_delayed_work_sync(&sfp->poll); 263573970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 263673970055SRussell King if (sfp->i2c_mii) { 263773970055SRussell King mdiobus_unregister(sfp->i2c_mii); 263873970055SRussell King mdiobus_free(sfp->i2c_mii); 263973970055SRussell King } 264073970055SRussell King if (sfp->i2c) 264173970055SRussell King i2c_put_adapter(sfp->i2c); 264273970055SRussell King kfree(sfp); 264373970055SRussell King } 264473970055SRussell King 264573970055SRussell King static int sfp_probe(struct platform_device *pdev) 264673970055SRussell King { 2647259c8618SRussell King const struct sff_data *sff; 26487ce236faSRuslan Babayev struct i2c_adapter *i2c; 26495411ca71SChris Healy char *sfp_irq_name; 265073970055SRussell King struct sfp *sfp; 2651257c2559SRobert Hancock int err, i; 265273970055SRussell King 265373970055SRussell King sfp = sfp_alloc(&pdev->dev); 265473970055SRussell King if (IS_ERR(sfp)) 265573970055SRussell King return PTR_ERR(sfp); 265673970055SRussell King 265773970055SRussell King platform_set_drvdata(pdev, sfp); 265873970055SRussell King 26590a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 266073970055SRussell King if (err < 0) 266173970055SRussell King return err; 266273970055SRussell King 2663259c8618SRussell King sff = sfp->type = &sfp_data; 2664259c8618SRussell King 266573970055SRussell King if (pdev->dev.of_node) { 266673970055SRussell King struct device_node *node = pdev->dev.of_node; 2667259c8618SRussell King const struct of_device_id *id; 266873970055SRussell King struct device_node *np; 266973970055SRussell King 2670259c8618SRussell King id = of_match_node(sfp_of_match, node); 2671259c8618SRussell King if (WARN_ON(!id)) 2672259c8618SRussell King return -EINVAL; 2673259c8618SRussell King 2674259c8618SRussell King sff = sfp->type = id->data; 2675259c8618SRussell King 267673970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 267766ede1f9SAntoine Tenart if (!np) { 267866ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 267966ede1f9SAntoine Tenart return -ENODEV; 268066ede1f9SAntoine Tenart } 268173970055SRussell King 268273970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 268373970055SRussell King of_node_put(np); 26847ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 26857ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 26867ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 26877ce236faSRuslan Babayev struct fwnode_reference_args args; 26887ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 26897ce236faSRuslan Babayev int ret; 26907ce236faSRuslan Babayev 26917ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 26921086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 26937ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 26947ce236faSRuslan Babayev return -ENODEV; 26957ce236faSRuslan Babayev } 26967ce236faSRuslan Babayev 26977ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 26987ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 26997ce236faSRuslan Babayev } else { 27007ce236faSRuslan Babayev return -EINVAL; 27017ce236faSRuslan Babayev } 27027ce236faSRuslan Babayev 270373970055SRussell King if (!i2c) 270473970055SRussell King return -EPROBE_DEFER; 270573970055SRussell King 270673970055SRussell King err = sfp_i2c_configure(sfp, i2c); 270773970055SRussell King if (err < 0) { 270873970055SRussell King i2c_put_adapter(i2c); 270973970055SRussell King return err; 271073970055SRussell King } 271173970055SRussell King 2712259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2713259c8618SRussell King if (sff->gpios & BIT(i)) { 271473970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 271573970055SRussell King gpio_of_names[i], gpio_flags[i]); 271673970055SRussell King if (IS_ERR(sfp->gpio[i])) 271773970055SRussell King return PTR_ERR(sfp->gpio[i]); 271873970055SRussell King } 271973970055SRussell King 27208475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 27218475c4b7SRussell King (Oracle) 272273970055SRussell King sfp->get_state = sfp_gpio_get_state; 272373970055SRussell King sfp->set_state = sfp_gpio_set_state; 2724259c8618SRussell King 2725259c8618SRussell King /* Modules that have no detect signal are always present */ 2726259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2727259c8618SRussell King sfp->get_state = sff_gpio_get_state; 272873970055SRussell King 27293bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 27303bb35261SJon Nettleton &sfp->max_power_mW); 273102eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 273202eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 273302eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 273402eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 27353bb35261SJon Nettleton sfp->max_power_mW = 1000; 273602eaf5a7SRussell King (Oracle) } 27373bb35261SJon Nettleton 27383bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 27393bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 27403bb35261SJon Nettleton 274173970055SRussell King /* Get the initial state, and always signal TX disable, 274273970055SRussell King * since the network interface will not be up. 274373970055SRussell King */ 274473970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 274573970055SRussell King 274673970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 274773970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 274873970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 274973970055SRussell King sfp_set_state(sfp, sfp->state); 275073970055SRussell King sfp_module_tx_disable(sfp); 275173f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 275273f5e847SRussell King rtnl_lock(); 275373f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 275473f5e847SRussell King rtnl_unlock(); 275573f5e847SRussell King } 275673970055SRussell King 275773970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 275873970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 275973970055SRussell King continue; 276073970055SRussell King 2761257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 276296216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 276396216181SYueHaibing sfp->gpio_irq[i] = 0; 2764f3c9a666SRussell King sfp->need_poll = true; 276573970055SRussell King continue; 276673970055SRussell King } 276773970055SRussell King 27685411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 27695411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 27705411ca71SChris Healy gpio_of_names[i]); 27715411ca71SChris Healy 27728cb601f1SChris Healy if (!sfp_irq_name) 27738cb601f1SChris Healy return -ENOMEM; 27748cb601f1SChris Healy 2775257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2776257c2559SRobert Hancock NULL, sfp_irq, 277773970055SRussell King IRQF_ONESHOT | 277873970055SRussell King IRQF_TRIGGER_RISING | 277973970055SRussell King IRQF_TRIGGER_FALLING, 27805411ca71SChris Healy sfp_irq_name, sfp); 2781257c2559SRobert Hancock if (err) { 2782257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2783f3c9a666SRussell King sfp->need_poll = true; 278473970055SRussell King } 2785257c2559SRobert Hancock } 278673970055SRussell King 2787f3c9a666SRussell King if (sfp->need_poll) 278873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 278973970055SRussell King 2790a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2791a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2792a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2793a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2794a1f5d1f0SAntoine Tenart */ 2795a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2796a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2797a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2798a1f5d1f0SAntoine Tenart 2799b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2800b5bfc21aSRussell King if (!sfp->sfp_bus) 2801b5bfc21aSRussell King return -ENOMEM; 2802b5bfc21aSRussell King 28039cc8976cSRussell King sfp_debugfs_init(sfp); 28049cc8976cSRussell King 280573970055SRussell King return 0; 280673970055SRussell King } 280773970055SRussell King 280873970055SRussell King static int sfp_remove(struct platform_device *pdev) 280973970055SRussell King { 281073970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 281173970055SRussell King 28129cc8976cSRussell King sfp_debugfs_exit(sfp); 281373970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 281473970055SRussell King 28150cb96b57SRussell King rtnl_lock(); 28160cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 28170cb96b57SRussell King rtnl_unlock(); 28180cb96b57SRussell King 281973970055SRussell King return 0; 282073970055SRussell King } 282173970055SRussell King 2822257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2823257c2559SRobert Hancock { 2824257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2825257c2559SRobert Hancock int i; 2826257c2559SRobert Hancock 2827257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2828257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2829257c2559SRobert Hancock continue; 2830257c2559SRobert Hancock 2831257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2832257c2559SRobert Hancock } 2833257c2559SRobert Hancock 2834257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2835257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2836257c2559SRobert Hancock } 2837257c2559SRobert Hancock 283873970055SRussell King static struct platform_driver sfp_driver = { 283973970055SRussell King .probe = sfp_probe, 284073970055SRussell King .remove = sfp_remove, 2841257c2559SRobert Hancock .shutdown = sfp_shutdown, 284273970055SRussell King .driver = { 284373970055SRussell King .name = "sfp", 284473970055SRussell King .of_match_table = sfp_of_match, 284573970055SRussell King }, 284673970055SRussell King }; 284773970055SRussell King 284873970055SRussell King static int sfp_init(void) 284973970055SRussell King { 285073970055SRussell King poll_jiffies = msecs_to_jiffies(100); 285173970055SRussell King 285273970055SRussell King return platform_driver_register(&sfp_driver); 285373970055SRussell King } 285473970055SRussell King module_init(sfp_init); 285573970055SRussell King 285673970055SRussell King static void sfp_exit(void) 285773970055SRussell King { 285873970055SRussell King platform_driver_unregister(&sfp_driver); 285973970055SRussell King } 286073970055SRussell King module_exit(sfp_exit); 286173970055SRussell King 286273970055SRussell King MODULE_ALIAS("platform:sfp"); 286373970055SRussell King MODULE_AUTHOR("Russell King"); 286473970055SRussell King MODULE_LICENSE("GPL v2"); 2865