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 611f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 612f3c9a666SRussell King { 613f3c9a666SRussell King unsigned int state = 0; 614f3c9a666SRussell King u8 status; 6150dea4d03SRussell King int ret; 616f3c9a666SRussell King 6170dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 6180dea4d03SRussell King if (ret == sizeof(status)) { 619f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 620f3c9a666SRussell King state |= SFP_F_LOS; 621f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 622f3c9a666SRussell King state |= SFP_F_TX_FAULT; 6230dea4d03SRussell King } else { 6240dea4d03SRussell King dev_err_ratelimited(sfp->dev, 6259ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 6269ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 6270dea4d03SRussell King /* Preserve the current state */ 6280dea4d03SRussell King state = sfp->state; 629f3c9a666SRussell King } 630f3c9a666SRussell King 631f3c9a666SRussell King return state & sfp->state_soft_mask; 632f3c9a666SRussell King } 633f3c9a666SRussell King 634f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 635f3c9a666SRussell King { 636f3c9a666SRussell King u8 status; 637f3c9a666SRussell King 638f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 639f3c9a666SRussell King sizeof(status)) { 640f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 641f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 642f3c9a666SRussell King else 643f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 644f3c9a666SRussell King 645f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 646f3c9a666SRussell King } 647f3c9a666SRussell King } 648f3c9a666SRussell King 649f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 650f3c9a666SRussell King { 651f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 6528475c4b7SRussell King (Oracle) unsigned int mask = 0; 653f3c9a666SRussell King 654f3c9a666SRussell King sfp->state_soft_mask = 0; 6558475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 6568475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 6578475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 6588475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 6598475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 6608475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 6618475c4b7SRussell King (Oracle) 6628475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 6638475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 664f3c9a666SRussell King 665f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 666f3c9a666SRussell King !sfp->need_poll) 667f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 668f3c9a666SRussell King } 669f3c9a666SRussell King 670f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 671f3c9a666SRussell King { 672f3c9a666SRussell King sfp->state_soft_mask = 0; 673f3c9a666SRussell King } 674f3c9a666SRussell King 675f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 676f3c9a666SRussell King { 6778475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 6788475c4b7SRussell King (Oracle) unsigned int state; 679f3c9a666SRussell King 6808475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 6818475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 682f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 683f3c9a666SRussell King 684f3c9a666SRussell King return state; 685f3c9a666SRussell King } 686f3c9a666SRussell King 687f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 688f3c9a666SRussell King { 689f3c9a666SRussell King sfp->set_state(sfp, state); 690f3c9a666SRussell King 691f3c9a666SRussell King if (state & SFP_F_PRESENT && 692f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 693f3c9a666SRussell King sfp_soft_set_state(sfp, state); 694f3c9a666SRussell King } 695f3c9a666SRussell King 69673970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 69773970055SRussell King { 69873970055SRussell King u8 *p, check; 69973970055SRussell King 70073970055SRussell King for (p = buf, check = 0; len; p++, len--) 70173970055SRussell King check += *p; 70273970055SRussell King 70373970055SRussell King return check; 70473970055SRussell King } 70573970055SRussell King 7061323061aSAndrew Lunn /* hwmon */ 7071323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 7081323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 7091323061aSAndrew Lunn enum hwmon_sensor_types type, 7101323061aSAndrew Lunn u32 attr, int channel) 7111323061aSAndrew Lunn { 7121323061aSAndrew Lunn const struct sfp *sfp = data; 7131323061aSAndrew Lunn 7141323061aSAndrew Lunn switch (type) { 7151323061aSAndrew Lunn case hwmon_temp: 7161323061aSAndrew Lunn switch (attr) { 7171323061aSAndrew Lunn case hwmon_temp_min_alarm: 7181323061aSAndrew Lunn case hwmon_temp_max_alarm: 7191323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7201323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7211323061aSAndrew Lunn case hwmon_temp_min: 7221323061aSAndrew Lunn case hwmon_temp_max: 7231323061aSAndrew Lunn case hwmon_temp_lcrit: 7241323061aSAndrew Lunn case hwmon_temp_crit: 725a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 726a33710bdSAndrew Lunn return 0; 727df561f66SGustavo A. R. Silva fallthrough; 728a33710bdSAndrew Lunn case hwmon_temp_input: 729c1236979SAndrew Lunn case hwmon_temp_label: 7301323061aSAndrew Lunn return 0444; 7311323061aSAndrew Lunn default: 7321323061aSAndrew Lunn return 0; 7331323061aSAndrew Lunn } 7341323061aSAndrew Lunn case hwmon_in: 7351323061aSAndrew Lunn switch (attr) { 7361323061aSAndrew Lunn case hwmon_in_min_alarm: 7371323061aSAndrew Lunn case hwmon_in_max_alarm: 7381323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7391323061aSAndrew Lunn case hwmon_in_crit_alarm: 7401323061aSAndrew Lunn case hwmon_in_min: 7411323061aSAndrew Lunn case hwmon_in_max: 7421323061aSAndrew Lunn case hwmon_in_lcrit: 7431323061aSAndrew Lunn case hwmon_in_crit: 744a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 745a33710bdSAndrew Lunn return 0; 746df561f66SGustavo A. R. Silva fallthrough; 747a33710bdSAndrew Lunn case hwmon_in_input: 748c1236979SAndrew Lunn case hwmon_in_label: 7491323061aSAndrew Lunn return 0444; 7501323061aSAndrew Lunn default: 7511323061aSAndrew Lunn return 0; 7521323061aSAndrew Lunn } 7531323061aSAndrew Lunn case hwmon_curr: 7541323061aSAndrew Lunn switch (attr) { 7551323061aSAndrew Lunn case hwmon_curr_min_alarm: 7561323061aSAndrew Lunn case hwmon_curr_max_alarm: 7571323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 7581323061aSAndrew Lunn case hwmon_curr_crit_alarm: 7591323061aSAndrew Lunn case hwmon_curr_min: 7601323061aSAndrew Lunn case hwmon_curr_max: 7611323061aSAndrew Lunn case hwmon_curr_lcrit: 7621323061aSAndrew Lunn case hwmon_curr_crit: 763a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 764a33710bdSAndrew Lunn return 0; 765df561f66SGustavo A. R. Silva fallthrough; 766a33710bdSAndrew Lunn case hwmon_curr_input: 767c1236979SAndrew Lunn case hwmon_curr_label: 7681323061aSAndrew Lunn return 0444; 7691323061aSAndrew Lunn default: 7701323061aSAndrew Lunn return 0; 7711323061aSAndrew Lunn } 7721323061aSAndrew Lunn case hwmon_power: 7731323061aSAndrew Lunn /* External calibration of receive power requires 7741323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 7751323061aSAndrew Lunn * is not easy, so just skip it. If the module does 7761323061aSAndrew Lunn * not require external calibration, we can however 7771323061aSAndrew Lunn * show receiver power, since FP is then not needed. 7781323061aSAndrew Lunn */ 7791323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 7801323061aSAndrew Lunn channel == 1) 7811323061aSAndrew Lunn return 0; 7821323061aSAndrew Lunn switch (attr) { 7831323061aSAndrew Lunn case hwmon_power_min_alarm: 7841323061aSAndrew Lunn case hwmon_power_max_alarm: 7851323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 7861323061aSAndrew Lunn case hwmon_power_crit_alarm: 7871323061aSAndrew Lunn case hwmon_power_min: 7881323061aSAndrew Lunn case hwmon_power_max: 7891323061aSAndrew Lunn case hwmon_power_lcrit: 7901323061aSAndrew Lunn case hwmon_power_crit: 791a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 792a33710bdSAndrew Lunn return 0; 793df561f66SGustavo A. R. Silva fallthrough; 794a33710bdSAndrew Lunn case hwmon_power_input: 795c1236979SAndrew Lunn case hwmon_power_label: 7961323061aSAndrew Lunn return 0444; 7971323061aSAndrew Lunn default: 7981323061aSAndrew Lunn return 0; 7991323061aSAndrew Lunn } 8001323061aSAndrew Lunn default: 8011323061aSAndrew Lunn return 0; 8021323061aSAndrew Lunn } 8031323061aSAndrew Lunn } 8041323061aSAndrew Lunn 8051323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 8061323061aSAndrew Lunn { 8071323061aSAndrew Lunn __be16 val; 8081323061aSAndrew Lunn int err; 8091323061aSAndrew Lunn 8101323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 8111323061aSAndrew Lunn if (err < 0) 8121323061aSAndrew Lunn return err; 8131323061aSAndrew Lunn 8141323061aSAndrew Lunn *value = be16_to_cpu(val); 8151323061aSAndrew Lunn 8161323061aSAndrew Lunn return 0; 8171323061aSAndrew Lunn } 8181323061aSAndrew Lunn 8191323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 8201323061aSAndrew Lunn { 8210cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8221323061aSAndrew Lunn } 8231323061aSAndrew Lunn 8241323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 8251323061aSAndrew Lunn long *value) 8261323061aSAndrew Lunn { 8271323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 8281323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 8291323061aSAndrew Lunn } 8301323061aSAndrew Lunn 8311323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 8321323061aSAndrew Lunn { 8331323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 8341323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 8351323061aSAndrew Lunn 8361323061aSAndrew Lunn if (*value >= 0x8000) 8371323061aSAndrew Lunn *value -= 0x10000; 8381323061aSAndrew Lunn 8391323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 8401323061aSAndrew Lunn } 8411323061aSAndrew Lunn 8421323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 8431323061aSAndrew Lunn { 8441323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 8451323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 8461323061aSAndrew Lunn 8471323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8481323061aSAndrew Lunn } 8491323061aSAndrew Lunn 8501323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 8511323061aSAndrew Lunn { 8521323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 8531323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 8541323061aSAndrew Lunn 8551323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 8561323061aSAndrew Lunn } 8571323061aSAndrew Lunn 8581323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 8591323061aSAndrew Lunn { 8601323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 8611323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 8621323061aSAndrew Lunn 8631323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8641323061aSAndrew Lunn } 8651323061aSAndrew Lunn 8661323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 8671323061aSAndrew Lunn { 8681323061aSAndrew Lunn int err; 8691323061aSAndrew Lunn 8701323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 8711323061aSAndrew Lunn if (err < 0) 8721323061aSAndrew Lunn return err; 8731323061aSAndrew Lunn 8741323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8751323061aSAndrew Lunn 8761323061aSAndrew Lunn return 0; 8771323061aSAndrew Lunn } 8781323061aSAndrew Lunn 8791323061aSAndrew Lunn static int sfp_hwmon_read_vcc(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_vcc(sfp, value); 8881323061aSAndrew Lunn 8891323061aSAndrew Lunn return 0; 8901323061aSAndrew Lunn } 8911323061aSAndrew Lunn 8921323061aSAndrew Lunn static int sfp_hwmon_read_bias(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_bias(sfp, value); 9011323061aSAndrew Lunn 9021323061aSAndrew Lunn return 0; 9031323061aSAndrew Lunn } 9041323061aSAndrew Lunn 9051323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(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_tx_power(sfp, value); 9141323061aSAndrew Lunn 9151323061aSAndrew Lunn return 0; 9161323061aSAndrew Lunn } 9171323061aSAndrew Lunn 9181323061aSAndrew Lunn static int sfp_hwmon_read_rx_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_to_rx_power(value); 9271323061aSAndrew Lunn 9281323061aSAndrew Lunn return 0; 9291323061aSAndrew Lunn } 9301323061aSAndrew Lunn 9311323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 9321323061aSAndrew Lunn { 9331323061aSAndrew Lunn u8 status; 9341323061aSAndrew Lunn int err; 9351323061aSAndrew Lunn 9361323061aSAndrew Lunn switch (attr) { 9371323061aSAndrew Lunn case hwmon_temp_input: 9381323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 9391323061aSAndrew Lunn 9401323061aSAndrew Lunn case hwmon_temp_lcrit: 9411323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 9421323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9431323061aSAndrew Lunn return 0; 9441323061aSAndrew Lunn 9451323061aSAndrew Lunn case hwmon_temp_min: 9461323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 9471323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9481323061aSAndrew Lunn return 0; 9491323061aSAndrew Lunn case hwmon_temp_max: 9501323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 9511323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9521323061aSAndrew Lunn return 0; 9531323061aSAndrew Lunn 9541323061aSAndrew Lunn case hwmon_temp_crit: 9551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 9561323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9571323061aSAndrew Lunn return 0; 9581323061aSAndrew Lunn 9591323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 9601323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9611323061aSAndrew Lunn if (err < 0) 9621323061aSAndrew Lunn return err; 9631323061aSAndrew Lunn 9641323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 9651323061aSAndrew Lunn return 0; 9661323061aSAndrew Lunn 9671323061aSAndrew Lunn case hwmon_temp_min_alarm: 9681323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9691323061aSAndrew Lunn if (err < 0) 9701323061aSAndrew Lunn return err; 9711323061aSAndrew Lunn 9721323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 9731323061aSAndrew Lunn return 0; 9741323061aSAndrew Lunn 9751323061aSAndrew Lunn case hwmon_temp_max_alarm: 9761323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9771323061aSAndrew Lunn if (err < 0) 9781323061aSAndrew Lunn return err; 9791323061aSAndrew Lunn 9801323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 9811323061aSAndrew Lunn return 0; 9821323061aSAndrew Lunn 9831323061aSAndrew Lunn case hwmon_temp_crit_alarm: 9841323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9851323061aSAndrew Lunn if (err < 0) 9861323061aSAndrew Lunn return err; 9871323061aSAndrew Lunn 9881323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 9891323061aSAndrew Lunn return 0; 9901323061aSAndrew Lunn default: 9911323061aSAndrew Lunn return -EOPNOTSUPP; 9921323061aSAndrew Lunn } 9931323061aSAndrew Lunn 9941323061aSAndrew Lunn return -EOPNOTSUPP; 9951323061aSAndrew Lunn } 9961323061aSAndrew Lunn 9971323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 9981323061aSAndrew Lunn { 9991323061aSAndrew Lunn u8 status; 10001323061aSAndrew Lunn int err; 10011323061aSAndrew Lunn 10021323061aSAndrew Lunn switch (attr) { 10031323061aSAndrew Lunn case hwmon_in_input: 10041323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 10051323061aSAndrew Lunn 10061323061aSAndrew Lunn case hwmon_in_lcrit: 10071323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 10081323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10091323061aSAndrew Lunn return 0; 10101323061aSAndrew Lunn 10111323061aSAndrew Lunn case hwmon_in_min: 10121323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 10131323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10141323061aSAndrew Lunn return 0; 10151323061aSAndrew Lunn 10161323061aSAndrew Lunn case hwmon_in_max: 10171323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 10181323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10191323061aSAndrew Lunn return 0; 10201323061aSAndrew Lunn 10211323061aSAndrew Lunn case hwmon_in_crit: 10221323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 10231323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10241323061aSAndrew Lunn return 0; 10251323061aSAndrew Lunn 10261323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 10271323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10281323061aSAndrew Lunn if (err < 0) 10291323061aSAndrew Lunn return err; 10301323061aSAndrew Lunn 10311323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 10321323061aSAndrew Lunn return 0; 10331323061aSAndrew Lunn 10341323061aSAndrew Lunn case hwmon_in_min_alarm: 10351323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10361323061aSAndrew Lunn if (err < 0) 10371323061aSAndrew Lunn return err; 10381323061aSAndrew Lunn 10391323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 10401323061aSAndrew Lunn return 0; 10411323061aSAndrew Lunn 10421323061aSAndrew Lunn case hwmon_in_max_alarm: 10431323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10441323061aSAndrew Lunn if (err < 0) 10451323061aSAndrew Lunn return err; 10461323061aSAndrew Lunn 10471323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 10481323061aSAndrew Lunn return 0; 10491323061aSAndrew Lunn 10501323061aSAndrew Lunn case hwmon_in_crit_alarm: 10511323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10521323061aSAndrew Lunn if (err < 0) 10531323061aSAndrew Lunn return err; 10541323061aSAndrew Lunn 10551323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 10561323061aSAndrew Lunn return 0; 10571323061aSAndrew Lunn default: 10581323061aSAndrew Lunn return -EOPNOTSUPP; 10591323061aSAndrew Lunn } 10601323061aSAndrew Lunn 10611323061aSAndrew Lunn return -EOPNOTSUPP; 10621323061aSAndrew Lunn } 10631323061aSAndrew Lunn 10641323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 10651323061aSAndrew Lunn { 10661323061aSAndrew Lunn u8 status; 10671323061aSAndrew Lunn int err; 10681323061aSAndrew Lunn 10691323061aSAndrew Lunn switch (attr) { 10701323061aSAndrew Lunn case hwmon_curr_input: 10711323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 10721323061aSAndrew Lunn 10731323061aSAndrew Lunn case hwmon_curr_lcrit: 10741323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 10751323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10761323061aSAndrew Lunn return 0; 10771323061aSAndrew Lunn 10781323061aSAndrew Lunn case hwmon_curr_min: 10791323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 10801323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10811323061aSAndrew Lunn return 0; 10821323061aSAndrew Lunn 10831323061aSAndrew Lunn case hwmon_curr_max: 10841323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 10851323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10861323061aSAndrew Lunn return 0; 10871323061aSAndrew Lunn 10881323061aSAndrew Lunn case hwmon_curr_crit: 10891323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 10901323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10911323061aSAndrew Lunn return 0; 10921323061aSAndrew Lunn 10931323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 10941323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10951323061aSAndrew Lunn if (err < 0) 10961323061aSAndrew Lunn return err; 10971323061aSAndrew Lunn 10981323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 10991323061aSAndrew Lunn return 0; 11001323061aSAndrew Lunn 11011323061aSAndrew Lunn case hwmon_curr_min_alarm: 11021323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11031323061aSAndrew Lunn if (err < 0) 11041323061aSAndrew Lunn return err; 11051323061aSAndrew Lunn 11061323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 11071323061aSAndrew Lunn return 0; 11081323061aSAndrew Lunn 11091323061aSAndrew Lunn case hwmon_curr_max_alarm: 11101323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11111323061aSAndrew Lunn if (err < 0) 11121323061aSAndrew Lunn return err; 11131323061aSAndrew Lunn 11141323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 11151323061aSAndrew Lunn return 0; 11161323061aSAndrew Lunn 11171323061aSAndrew Lunn case hwmon_curr_crit_alarm: 11181323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11191323061aSAndrew Lunn if (err < 0) 11201323061aSAndrew Lunn return err; 11211323061aSAndrew Lunn 11221323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 11231323061aSAndrew Lunn return 0; 11241323061aSAndrew Lunn default: 11251323061aSAndrew Lunn return -EOPNOTSUPP; 11261323061aSAndrew Lunn } 11271323061aSAndrew Lunn 11281323061aSAndrew Lunn return -EOPNOTSUPP; 11291323061aSAndrew Lunn } 11301323061aSAndrew Lunn 11311323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 11321323061aSAndrew Lunn { 11331323061aSAndrew Lunn u8 status; 11341323061aSAndrew Lunn int err; 11351323061aSAndrew Lunn 11361323061aSAndrew Lunn switch (attr) { 11371323061aSAndrew Lunn case hwmon_power_input: 11381323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 11391323061aSAndrew Lunn 11401323061aSAndrew Lunn case hwmon_power_lcrit: 11411323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 11421323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11431323061aSAndrew Lunn return 0; 11441323061aSAndrew Lunn 11451323061aSAndrew Lunn case hwmon_power_min: 11461323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 11471323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11481323061aSAndrew Lunn return 0; 11491323061aSAndrew Lunn 11501323061aSAndrew Lunn case hwmon_power_max: 11511323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 11521323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11531323061aSAndrew Lunn return 0; 11541323061aSAndrew Lunn 11551323061aSAndrew Lunn case hwmon_power_crit: 11561323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 11571323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11581323061aSAndrew Lunn return 0; 11591323061aSAndrew Lunn 11601323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 11611323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11621323061aSAndrew Lunn if (err < 0) 11631323061aSAndrew Lunn return err; 11641323061aSAndrew Lunn 11651323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 11661323061aSAndrew Lunn return 0; 11671323061aSAndrew Lunn 11681323061aSAndrew Lunn case hwmon_power_min_alarm: 11691323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11701323061aSAndrew Lunn if (err < 0) 11711323061aSAndrew Lunn return err; 11721323061aSAndrew Lunn 11731323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 11741323061aSAndrew Lunn return 0; 11751323061aSAndrew Lunn 11761323061aSAndrew Lunn case hwmon_power_max_alarm: 11771323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11781323061aSAndrew Lunn if (err < 0) 11791323061aSAndrew Lunn return err; 11801323061aSAndrew Lunn 11811323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 11821323061aSAndrew Lunn return 0; 11831323061aSAndrew Lunn 11841323061aSAndrew Lunn case hwmon_power_crit_alarm: 11851323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11861323061aSAndrew Lunn if (err < 0) 11871323061aSAndrew Lunn return err; 11881323061aSAndrew Lunn 11891323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 11901323061aSAndrew Lunn return 0; 11911323061aSAndrew Lunn default: 11921323061aSAndrew Lunn return -EOPNOTSUPP; 11931323061aSAndrew Lunn } 11941323061aSAndrew Lunn 11951323061aSAndrew Lunn return -EOPNOTSUPP; 11961323061aSAndrew Lunn } 11971323061aSAndrew Lunn 11981323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 11991323061aSAndrew Lunn { 12001323061aSAndrew Lunn u8 status; 12011323061aSAndrew Lunn int err; 12021323061aSAndrew Lunn 12031323061aSAndrew Lunn switch (attr) { 12041323061aSAndrew Lunn case hwmon_power_input: 12051323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 12061323061aSAndrew Lunn 12071323061aSAndrew Lunn case hwmon_power_lcrit: 12081323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 12091323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12101323061aSAndrew Lunn return 0; 12111323061aSAndrew Lunn 12121323061aSAndrew Lunn case hwmon_power_min: 12131323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 12141323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12151323061aSAndrew Lunn return 0; 12161323061aSAndrew Lunn 12171323061aSAndrew Lunn case hwmon_power_max: 12181323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 12191323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12201323061aSAndrew Lunn return 0; 12211323061aSAndrew Lunn 12221323061aSAndrew Lunn case hwmon_power_crit: 12231323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 12241323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12251323061aSAndrew Lunn return 0; 12261323061aSAndrew Lunn 12271323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12281323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12291323061aSAndrew Lunn if (err < 0) 12301323061aSAndrew Lunn return err; 12311323061aSAndrew Lunn 12321323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 12331323061aSAndrew Lunn return 0; 12341323061aSAndrew Lunn 12351323061aSAndrew Lunn case hwmon_power_min_alarm: 12361323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12371323061aSAndrew Lunn if (err < 0) 12381323061aSAndrew Lunn return err; 12391323061aSAndrew Lunn 12401323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 12411323061aSAndrew Lunn return 0; 12421323061aSAndrew Lunn 12431323061aSAndrew Lunn case hwmon_power_max_alarm: 12441323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12451323061aSAndrew Lunn if (err < 0) 12461323061aSAndrew Lunn return err; 12471323061aSAndrew Lunn 12481323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 12491323061aSAndrew Lunn return 0; 12501323061aSAndrew Lunn 12511323061aSAndrew Lunn case hwmon_power_crit_alarm: 12521323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12531323061aSAndrew Lunn if (err < 0) 12541323061aSAndrew Lunn return err; 12551323061aSAndrew Lunn 12561323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 12571323061aSAndrew Lunn return 0; 12581323061aSAndrew Lunn default: 12591323061aSAndrew Lunn return -EOPNOTSUPP; 12601323061aSAndrew Lunn } 12611323061aSAndrew Lunn 12621323061aSAndrew Lunn return -EOPNOTSUPP; 12631323061aSAndrew Lunn } 12641323061aSAndrew Lunn 12651323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 12661323061aSAndrew Lunn u32 attr, int channel, long *value) 12671323061aSAndrew Lunn { 12681323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 12691323061aSAndrew Lunn 12701323061aSAndrew Lunn switch (type) { 12711323061aSAndrew Lunn case hwmon_temp: 12721323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 12731323061aSAndrew Lunn case hwmon_in: 12741323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 12751323061aSAndrew Lunn case hwmon_curr: 12761323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 12771323061aSAndrew Lunn case hwmon_power: 12781323061aSAndrew Lunn switch (channel) { 12791323061aSAndrew Lunn case 0: 12801323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 12811323061aSAndrew Lunn case 1: 12821323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 12831323061aSAndrew Lunn default: 12841323061aSAndrew Lunn return -EOPNOTSUPP; 12851323061aSAndrew Lunn } 12861323061aSAndrew Lunn default: 12871323061aSAndrew Lunn return -EOPNOTSUPP; 12881323061aSAndrew Lunn } 12891323061aSAndrew Lunn } 12901323061aSAndrew Lunn 1291c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1292c1236979SAndrew Lunn "TX_power", 1293c1236979SAndrew Lunn "RX_power", 1294c1236979SAndrew Lunn }; 1295c1236979SAndrew Lunn 1296c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1297c1236979SAndrew Lunn enum hwmon_sensor_types type, 1298c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1299c1236979SAndrew Lunn { 1300c1236979SAndrew Lunn switch (type) { 1301c1236979SAndrew Lunn case hwmon_curr: 1302c1236979SAndrew Lunn switch (attr) { 1303c1236979SAndrew Lunn case hwmon_curr_label: 1304c1236979SAndrew Lunn *str = "bias"; 1305c1236979SAndrew Lunn return 0; 1306c1236979SAndrew Lunn default: 1307c1236979SAndrew Lunn return -EOPNOTSUPP; 1308c1236979SAndrew Lunn } 1309c1236979SAndrew Lunn break; 1310c1236979SAndrew Lunn case hwmon_temp: 1311c1236979SAndrew Lunn switch (attr) { 1312c1236979SAndrew Lunn case hwmon_temp_label: 1313c1236979SAndrew Lunn *str = "temperature"; 1314c1236979SAndrew Lunn return 0; 1315c1236979SAndrew Lunn default: 1316c1236979SAndrew Lunn return -EOPNOTSUPP; 1317c1236979SAndrew Lunn } 1318c1236979SAndrew Lunn break; 1319c1236979SAndrew Lunn case hwmon_in: 1320c1236979SAndrew Lunn switch (attr) { 1321c1236979SAndrew Lunn case hwmon_in_label: 1322c1236979SAndrew Lunn *str = "VCC"; 1323c1236979SAndrew Lunn return 0; 1324c1236979SAndrew Lunn default: 1325c1236979SAndrew Lunn return -EOPNOTSUPP; 1326c1236979SAndrew Lunn } 1327c1236979SAndrew Lunn break; 1328c1236979SAndrew Lunn case hwmon_power: 1329c1236979SAndrew Lunn switch (attr) { 1330c1236979SAndrew Lunn case hwmon_power_label: 1331c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1332c1236979SAndrew Lunn return 0; 1333c1236979SAndrew Lunn default: 1334c1236979SAndrew Lunn return -EOPNOTSUPP; 1335c1236979SAndrew Lunn } 1336c1236979SAndrew Lunn break; 1337c1236979SAndrew Lunn default: 1338c1236979SAndrew Lunn return -EOPNOTSUPP; 1339c1236979SAndrew Lunn } 1340c1236979SAndrew Lunn 1341c1236979SAndrew Lunn return -EOPNOTSUPP; 1342c1236979SAndrew Lunn } 1343c1236979SAndrew Lunn 13441323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 13451323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 13461323061aSAndrew Lunn .read = sfp_hwmon_read, 1347c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 13481323061aSAndrew Lunn }; 13491323061aSAndrew Lunn 1350815f5f57SBeniamin Sandu static const struct hwmon_channel_info *sfp_hwmon_info[] = { 1351815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1352815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1353815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 13541323061aSAndrew Lunn HWMON_I_INPUT | 13551323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 13561323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 13571323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1358c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1359815f5f57SBeniamin Sandu HWMON_I_LABEL), 1360815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1361815f5f57SBeniamin Sandu HWMON_T_INPUT | 1362815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1363815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1364815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1365815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1366815f5f57SBeniamin Sandu HWMON_T_LABEL), 1367815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 13681323061aSAndrew Lunn HWMON_C_INPUT | 13691323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 13701323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 13711323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1372c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1373815f5f57SBeniamin Sandu HWMON_C_LABEL), 1374815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 13751323061aSAndrew Lunn /* Transmit power */ 13761323061aSAndrew Lunn HWMON_P_INPUT | 13771323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 13781323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 13791323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1380c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1381c1236979SAndrew Lunn HWMON_P_LABEL, 13821323061aSAndrew Lunn /* Receive power */ 13831323061aSAndrew Lunn HWMON_P_INPUT | 13841323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 13851323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 13861323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1387c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1388815f5f57SBeniamin Sandu HWMON_P_LABEL), 13891323061aSAndrew Lunn NULL, 13901323061aSAndrew Lunn }; 13911323061aSAndrew Lunn 13921323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 13931323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 13941323061aSAndrew Lunn .info = sfp_hwmon_info, 13951323061aSAndrew Lunn }; 13961323061aSAndrew Lunn 1397139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 13981323061aSAndrew Lunn { 1399139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 14003f118c44SMichael Walle int err; 14011323061aSAndrew Lunn 1402426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1403426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1404426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1405426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1406426c6cbcSPali Rohár * skip registration of hwmon device. 1407426c6cbcSPali Rohár */ 1408426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1409426c6cbcSPali Rohár dev_info(sfp->dev, 1410426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1411426c6cbcSPali Rohár dev_info(sfp->dev, 1412426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1413426c6cbcSPali Rohár return; 1414426c6cbcSPali Rohár } 1415426c6cbcSPali Rohár 1416139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1417139d3a21SRussell King if (err < 0) { 1418139d3a21SRussell King if (sfp->hwmon_tries--) { 1419139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1420139d3a21SRussell King T_PROBE_RETRY_SLOW); 1421139d3a21SRussell King } else { 14229ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 14239ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1424139d3a21SRussell King } 1425139d3a21SRussell King return; 1426139d3a21SRussell King } 1427139d3a21SRussell King 14283f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 14293f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1430139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1431139d3a21SRussell King return; 1432139d3a21SRussell King } 1433139d3a21SRussell King 1434139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1435139d3a21SRussell King sfp->hwmon_name, sfp, 1436139d3a21SRussell King &sfp_hwmon_chip_info, 1437139d3a21SRussell King NULL); 1438139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1439139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1440139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1441139d3a21SRussell King } 1442139d3a21SRussell King 1443139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1444139d3a21SRussell King { 14451323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 14461323061aSAndrew Lunn return 0; 14471323061aSAndrew Lunn 14481323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 14491323061aSAndrew Lunn return 0; 14501323061aSAndrew Lunn 14511323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 14521323061aSAndrew Lunn /* This driver in general does not support address 14531323061aSAndrew Lunn * change. 14541323061aSAndrew Lunn */ 14551323061aSAndrew Lunn return 0; 14561323061aSAndrew Lunn 1457139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1458139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 14591323061aSAndrew Lunn 1460139d3a21SRussell King return 0; 14611323061aSAndrew Lunn } 14621323061aSAndrew Lunn 14631323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 14641323061aSAndrew Lunn { 1465139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 14663e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 14671323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 14683e322474SAndrew Lunn sfp->hwmon_dev = NULL; 14691323061aSAndrew Lunn kfree(sfp->hwmon_name); 14701323061aSAndrew Lunn } 14713e322474SAndrew Lunn } 1472139d3a21SRussell King 1473139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1474139d3a21SRussell King { 1475139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1476139d3a21SRussell King 1477139d3a21SRussell King return 0; 1478139d3a21SRussell King } 1479139d3a21SRussell King 1480139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1481139d3a21SRussell King { 1482139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1483139d3a21SRussell King } 14841323061aSAndrew Lunn #else 14851323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 14861323061aSAndrew Lunn { 14871323061aSAndrew Lunn return 0; 14881323061aSAndrew Lunn } 14891323061aSAndrew Lunn 14901323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 14911323061aSAndrew Lunn { 14921323061aSAndrew Lunn } 1493139d3a21SRussell King 1494139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1495139d3a21SRussell King { 1496139d3a21SRussell King return 0; 1497139d3a21SRussell King } 1498139d3a21SRussell King 1499139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1500139d3a21SRussell King { 1501139d3a21SRussell King } 15021323061aSAndrew Lunn #endif 15031323061aSAndrew Lunn 150473970055SRussell King /* Helpers */ 150573970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 150673970055SRussell King { 150773970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 150873970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 150973970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 151073970055SRussell King sfp_set_state(sfp, sfp->state); 151173970055SRussell King } 151273970055SRussell King 151373970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 151473970055SRussell King { 151573970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 151673970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 151773970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 151873970055SRussell King sfp_set_state(sfp, sfp->state); 151973970055SRussell King } 152073970055SRussell King 15219cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 15229cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 15239cc8976cSRussell King { 15249cc8976cSRussell King struct sfp *sfp = s->private; 15259cc8976cSRussell King 15269cc8976cSRussell King seq_printf(s, "Module state: %s\n", 15279cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 15289cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 15299cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 15309cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 15319cc8976cSRussell King seq_printf(s, "Device state: %s\n", 15329cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 15339cc8976cSRussell King seq_printf(s, "Main state: %s\n", 15349cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 15359cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 15369cc8976cSRussell King sfp->sm_fault_retries); 15379cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 15389cc8976cSRussell King sfp->sm_phy_retries); 15399cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 15409cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 15419cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 15429cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 15439cc8976cSRussell King return 0; 15449cc8976cSRussell King } 15459cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 15469cc8976cSRussell King 15479cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15489cc8976cSRussell King { 15499cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 15509cc8976cSRussell King 15519cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 15529cc8976cSRussell King &sfp_debug_state_fops); 15539cc8976cSRussell King } 15549cc8976cSRussell King 15559cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15569cc8976cSRussell King { 15579cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 15589cc8976cSRussell King } 15599cc8976cSRussell King #else 15609cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15619cc8976cSRussell King { 15629cc8976cSRussell King } 15639cc8976cSRussell King 15649cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15659cc8976cSRussell King { 15669cc8976cSRussell King } 15679cc8976cSRussell King #endif 15689cc8976cSRussell King 156973970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 157073970055SRussell King { 157173970055SRussell King unsigned int state = sfp->state; 157273970055SRussell King 157373970055SRussell King if (state & SFP_F_TX_DISABLE) 157473970055SRussell King return; 157573970055SRussell King 157673970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 157773970055SRussell King 157873970055SRussell King udelay(T_RESET_US); 157973970055SRussell King 158073970055SRussell King sfp_set_state(sfp, state); 158173970055SRussell King } 158273970055SRussell King 158373970055SRussell King /* SFP state machine */ 158473970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 158573970055SRussell King { 158673970055SRussell King if (timeout) 158773970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 158873970055SRussell King timeout); 158973970055SRussell King else 159073970055SRussell King cancel_delayed_work(&sfp->timeout); 159173970055SRussell King } 159273970055SRussell King 159373970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 159473970055SRussell King unsigned int timeout) 159573970055SRussell King { 159673970055SRussell King sfp->sm_state = state; 159773970055SRussell King sfp_sm_set_timer(sfp, timeout); 159873970055SRussell King } 159973970055SRussell King 16000936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1601516b29edSFlorian Fainelli unsigned int timeout) 160273970055SRussell King { 160373970055SRussell King sfp->sm_mod_state = state; 160473970055SRussell King sfp_sm_set_timer(sfp, timeout); 160573970055SRussell King } 160673970055SRussell King 160773970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 160873970055SRussell King { 160973970055SRussell King sfp_remove_phy(sfp->sfp_bus); 161073970055SRussell King phy_device_remove(sfp->mod_phy); 161173970055SRussell King phy_device_free(sfp->mod_phy); 161273970055SRussell King sfp->mod_phy = NULL; 161373970055SRussell King } 161473970055SRussell King 1615324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 161673970055SRussell King { 161773970055SRussell King struct phy_device *phy; 161873970055SRussell King int err; 161973970055SRussell King 1620324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 16211cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 16221cb89a14SRussell King return PTR_ERR(phy); 162320b56ed9SRussell King if (IS_ERR(phy)) { 16249ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1625256e43cbSRussell King return PTR_ERR(phy); 162673970055SRussell King } 162773970055SRussell King 16289a484621SRussell King err = phy_device_register(phy); 16299a484621SRussell King if (err) { 16309a484621SRussell King phy_device_free(phy); 16319ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 16329ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1633256e43cbSRussell King return err; 16349a484621SRussell King } 16359a484621SRussell King 163673970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 163773970055SRussell King if (err) { 163873970055SRussell King phy_device_remove(phy); 163973970055SRussell King phy_device_free(phy); 16409ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1641256e43cbSRussell King return err; 164273970055SRussell King } 164373970055SRussell King 164473970055SRussell King sfp->mod_phy = phy; 1645256e43cbSRussell King 1646256e43cbSRussell King return 0; 164773970055SRussell King } 164873970055SRussell King 164973970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 165073970055SRussell King { 165173970055SRussell King sfp_link_up(sfp->sfp_bus); 165273970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 165373970055SRussell King } 165473970055SRussell King 165573970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 165673970055SRussell King { 165773970055SRussell King sfp_link_down(sfp->sfp_bus); 165873970055SRussell King } 165973970055SRussell King 166073970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 166173970055SRussell King { 1662624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1663624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1664624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1665624407d2SRussell King bool los = false; 166673970055SRussell King 1667710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1668624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1669624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 167073970055SRussell King */ 1671624407d2SRussell King if (los_options == los_inverted) 1672624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1673624407d2SRussell King else if (los_options == los_normal) 1674624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 167573970055SRussell King 167673970055SRussell King if (los) 167773970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 167873970055SRussell King else 167973970055SRussell King sfp_sm_link_up(sfp); 168073970055SRussell King } 168173970055SRussell King 1682710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1683710dfbb0SRussell King { 1684624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1685624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1686624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1687624407d2SRussell King 1688624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1689624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1690710dfbb0SRussell King } 1691710dfbb0SRussell King 1692710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1693710dfbb0SRussell King { 1694624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1695624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1696624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1697624407d2SRussell King 1698624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1699624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1700710dfbb0SRussell King } 1701710dfbb0SRussell King 170263ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 170373970055SRussell King { 1704281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1705516b29edSFlorian Fainelli dev_err(sfp->dev, 1706516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 170773970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 170873970055SRussell King } else { 170973970055SRussell King if (warn) 171073970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 171173970055SRussell King 171263ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 171373970055SRussell King } 171473970055SRussell King } 171573970055SRussell King 1716e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1717e85b1347SMarek Behún { 1718e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1719e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1720e85b1347SMarek Behún 1721e85b1347SMarek Behún return 0; 1722e85b1347SMarek Behún } 1723e85b1347SMarek Behún 17249a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 17259a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 17269a484621SRussell King * or clause 45 PHY. 17279a484621SRussell King * 17289a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 17299a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 17309a484621SRussell King * PHY driver to determine. 17319a484621SRussell King * 17329a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 17339a484621SRussell King * mode according to the negotiated line speed. 17349a484621SRussell King */ 1735256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1736181f29daSRussell King { 1737256e43cbSRussell King int err = 0; 1738256e43cbSRussell King 1739e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1740e85b1347SMarek Behún case MDIO_I2C_NONE: 17419a484621SRussell King break; 17429a484621SRussell King 1743e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1744324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 17459a484621SRussell King break; 1746e85b1347SMarek Behún 1747e85b1347SMarek Behún case MDIO_I2C_C45: 1748324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1749e85b1347SMarek Behún break; 175009bbedacSMarek Behún 175109bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1752324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 175309bbedacSMarek Behún break; 17549a484621SRussell King } 1755e85b1347SMarek Behún 1756256e43cbSRussell King return err; 175773970055SRussell King } 175873970055SRussell King 1759ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 17603bb35261SJon Nettleton { 1761ed32abb1SRussell King u32 power_mW = 1000; 17625765cee1SRussell King (Oracle) bool supports_a2; 17633bb35261SJon Nettleton 176418cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 176518cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1766ed32abb1SRussell King power_mW = 1500; 1767*f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1768*f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1769*f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1770ed32abb1SRussell King power_mW = 2000; 17713bb35261SJon Nettleton 177202eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 177302eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 177402eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 177502eaf5a7SRussell King (Oracle) return 0; 177602eaf5a7SRussell King (Oracle) } 177702eaf5a7SRussell King (Oracle) 17785765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 17795765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 17805765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 17815765cee1SRussell King (Oracle) 1782ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 17837cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 17845765cee1SRussell King (Oracle) if (!supports_a2) { 17857cfa9c92SRussell King /* The module appears not to implement bus address 17867cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 17877cfa9c92SRussell King * indicated mode. 17887cfa9c92SRussell King */ 17893bb35261SJon Nettleton dev_err(sfp->dev, 17903bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1791ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 17923bb35261SJon Nettleton return -EINVAL; 17937cfa9c92SRussell King } else { 17943bb35261SJon Nettleton dev_warn(sfp->dev, 17953bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1796ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 17973bb35261SJon Nettleton return 0; 17983bb35261SJon Nettleton } 17997cfa9c92SRussell King } 18007cfa9c92SRussell King 18015765cee1SRussell King (Oracle) if (!supports_a2) { 18025765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 18035765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 18045765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 18055765cee1SRussell King (Oracle) */ 18065765cee1SRussell King (Oracle) return 0; 18075765cee1SRussell King (Oracle) } 18085765cee1SRussell King (Oracle) 18097cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 18107cfa9c92SRussell King * an address change sequence, warn the user that the module may 18117cfa9c92SRussell King * not be functional. 18127cfa9c92SRussell King */ 18135765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 18147cfa9c92SRussell King dev_warn(sfp->dev, 181507f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 18167cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 18177cfa9c92SRussell King return 0; 18187cfa9c92SRussell King } 18193bb35261SJon Nettleton 1820ed32abb1SRussell King sfp->module_power_mW = power_mW; 1821ed32abb1SRussell King 1822ed32abb1SRussell King return 0; 1823ed32abb1SRussell King } 1824ed32abb1SRussell King 1825b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1826ed32abb1SRussell King { 1827ed32abb1SRussell King u8 val; 1828ed32abb1SRussell King int err; 1829ed32abb1SRussell King 18303bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 18313bb35261SJon Nettleton if (err != sizeof(val)) { 18329ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "Failed to read EEPROM: %pe\n", ERR_PTR(err)); 1833b036a554SRussell King return -EAGAIN; 18343bb35261SJon Nettleton } 18353bb35261SJon Nettleton 18369a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 18379a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 18389a484621SRussell King * if the bit is already set, we're already in high power mode. 18399a484621SRussell King */ 18409a484621SRussell King if (!!(val & BIT(0)) == enable) 18419a484621SRussell King return 0; 18429a484621SRussell King 1843b036a554SRussell King if (enable) 18443bb35261SJon Nettleton val |= BIT(0); 1845b036a554SRussell King else 1846b036a554SRussell King val &= ~BIT(0); 18473bb35261SJon Nettleton 18483bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 18493bb35261SJon Nettleton if (err != sizeof(val)) { 18509ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "Failed to write EEPROM: %pe\n", 18519ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1852b036a554SRussell King return -EAGAIN; 18533bb35261SJon Nettleton } 18543bb35261SJon Nettleton 1855b036a554SRussell King if (enable) 18563bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1857ed32abb1SRussell King sfp->module_power_mW / 1000, 1858ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 18593bb35261SJon Nettleton 1860b036a554SRussell King return 0; 18613bb35261SJon Nettleton } 18623bb35261SJon Nettleton 1863426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1864426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1865426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1866426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1867426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1868426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1869426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1870426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1871426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1872426c6cbcSPali Rohár * at a time. 18730d035bedSRussell King */ 1874426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 18750d035bedSRussell King { 1876426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 18770d035bedSRussell King 1878426c6cbcSPali Rohár /* Already using byte IO */ 1879426c6cbcSPali Rohár if (block_size == 1) 1880426c6cbcSPali Rohár return false; 1881426c6cbcSPali Rohár 1882426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1883426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1884426c6cbcSPali Rohár return false; 18850d035bedSRussell King } 1886426c6cbcSPali Rohár return true; 18870d035bedSRussell King } 18880d035bedSRussell King 1889b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1890b18432c5SChris Healy { 1891b18432c5SChris Healy u8 check; 1892b18432c5SChris Healy int err; 1893b18432c5SChris Healy 1894b18432c5SChris Healy if (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 dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1898b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1899b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1900b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1901b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1902b18432c5SChris Healy if (err != 3) { 19039ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19049ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 19059ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1906b18432c5SChris Healy return err; 1907b18432c5SChris Healy } 1908b18432c5SChris Healy 1909b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1910b18432c5SChris Healy mdelay(50); 1911b18432c5SChris Healy 1912b18432c5SChris Healy /* Update base structure checksum */ 1913b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1914b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1915b18432c5SChris Healy if (err != 1) { 19169ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19179ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 19189ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1919b18432c5SChris Healy return err; 1920b18432c5SChris Healy } 1921b18432c5SChris Healy } 1922b18432c5SChris Healy return 0; 1923b18432c5SChris Healy } 1924b18432c5SChris Healy 1925e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 192673970055SRussell King { 192773970055SRussell King /* SFP module inserted - read I2C data */ 192873970055SRussell King struct sfp_eeprom_id id; 1929b18432c5SChris Healy bool cotsworks_sfbg; 1930981f1f80SRussell King bool cotsworks; 193173970055SRussell King u8 check; 19323bb35261SJon Nettleton int ret; 193373970055SRussell King 1934426c6cbcSPali Rohár /* Some SFP modules and also some Linux I2C drivers do not like reads 1935426c6cbcSPali Rohár * longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at 1936426c6cbcSPali Rohár * a time. 19370d035bedSRussell King */ 1938426c6cbcSPali Rohár sfp->i2c_block_size = 16; 19390d035bedSRussell King 19400d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 19413bb35261SJon Nettleton if (ret < 0) { 1942e117be74SRussell King if (report) 19439ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 19449ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 194573970055SRussell King return -EAGAIN; 194673970055SRussell King } 194773970055SRussell King 19480d035bedSRussell King if (ret != sizeof(id.base)) { 19499ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 195073970055SRussell King return -EAGAIN; 195173970055SRussell King } 195273970055SRussell King 1953426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1954426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1955426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1956426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1957426c6cbcSPali Rohár * is really required and we have no other option. 1958426c6cbcSPali Rohár */ 1959426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1960426c6cbcSPali Rohár dev_info(sfp->dev, 1961426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1962426c6cbcSPali Rohár dev_info(sfp->dev, 1963426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1964426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1965426c6cbcSPali Rohár 1966426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1967426c6cbcSPali Rohár if (ret < 0) { 1968426c6cbcSPali Rohár if (report) 19699ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19709ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 19719ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1972426c6cbcSPali Rohár return -EAGAIN; 1973426c6cbcSPali Rohár } 1974426c6cbcSPali Rohár 1975426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 19769ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 19779ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1978426c6cbcSPali Rohár return -EAGAIN; 1979426c6cbcSPali Rohár } 1980426c6cbcSPali Rohár } 1981426c6cbcSPali Rohár 1982981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1983981f1f80SRussell King * do the final programming with the final module part number, 1984981f1f80SRussell King * serial number and date code. 1985981f1f80SRussell King */ 1986981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1987b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1988b18432c5SChris Healy 1989b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1990b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1991b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1992b18432c5SChris Healy */ 1993b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1994b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1995b18432c5SChris Healy if (ret < 0) 1996b18432c5SChris Healy return ret; 1997b18432c5SChris Healy } 1998981f1f80SRussell King 199973970055SRussell King /* Validate the checksum over the base structure */ 200073970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 200173970055SRussell King if (check != id.base.cc_base) { 2002981f1f80SRussell King if (cotsworks) { 2003981f1f80SRussell King dev_warn(sfp->dev, 2004981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 2005981f1f80SRussell King check, id.base.cc_base); 2006981f1f80SRussell King } else { 200773970055SRussell King dev_err(sfp->dev, 2008981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2009981f1f80SRussell King check, id.base.cc_base); 201073970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2011981f1f80SRussell King 16, 1, &id, sizeof(id), true); 201273970055SRussell King return -EINVAL; 201373970055SRussell King } 2014981f1f80SRussell King } 201573970055SRussell King 20160d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 20170d035bedSRussell King if (ret < 0) { 20180d035bedSRussell King if (report) 20199ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 20209ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 20210d035bedSRussell King return -EAGAIN; 20220d035bedSRussell King } 20230d035bedSRussell King 20240d035bedSRussell King if (ret != sizeof(id.ext)) { 20259ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 20260d035bedSRussell King return -EAGAIN; 20270d035bedSRussell King } 20280d035bedSRussell King 202973970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 203073970055SRussell King if (check != id.ext.cc_ext) { 2031981f1f80SRussell King if (cotsworks) { 2032981f1f80SRussell King dev_warn(sfp->dev, 2033981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2034981f1f80SRussell King check, id.ext.cc_ext); 2035981f1f80SRussell King } else { 203673970055SRussell King dev_err(sfp->dev, 2037981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2038981f1f80SRussell King check, id.ext.cc_ext); 2039981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2040981f1f80SRussell King 16, 1, &id, sizeof(id), true); 204173970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 204273970055SRussell King } 2043981f1f80SRussell King } 204473970055SRussell King 204573970055SRussell King sfp->id = id; 204673970055SRussell King 2047a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2048a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2049a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2050a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2051a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2052a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 205373970055SRussell King 2054259c8618SRussell King /* Check whether we support this module */ 2055f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2056259c8618SRussell King dev_err(sfp->dev, 2057259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 205873970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 205973970055SRussell King return -EINVAL; 206073970055SRussell King } 206173970055SRussell King 2062ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 2063ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 2064ec7681bdSRussell King dev_warn(sfp->dev, 2065ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 2066ec7681bdSRussell King 2067ed32abb1SRussell King /* Parse the module power requirement */ 2068ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2069ed32abb1SRussell King if (ret < 0) 2070ed32abb1SRussell King return ret; 2071ed32abb1SRussell King 20728475c4b7SRussell King (Oracle) /* Initialise state bits to use from hardware */ 20738475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 20748475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 20758475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_DISABLE; 20768475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 20778475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_FAULT; 20788475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 20798475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_LOS; 20808475c4b7SRussell King (Oracle) 208126c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2082324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 208326c97a2dSRussell King 20842069624dSMatthew Hagan sfp->tx_fault_ignore = false; 20852069624dSMatthew Hagan 2086e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2087e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2088e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2089e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2090e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2091e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2092e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2093e85b1347SMarek Behún else 2094e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2095e85b1347SMarek Behún 209623571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 209727541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 209827541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 209923571c7bSRussell King (Oracle) 2100b036a554SRussell King return 0; 210173970055SRussell King } 210273970055SRussell King 210373970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 210473970055SRussell King { 210573f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 210673970055SRussell King sfp_module_remove(sfp->sfp_bus); 210773970055SRussell King 21081323061aSAndrew Lunn sfp_hwmon_remove(sfp); 21091323061aSAndrew Lunn 211073970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2111ed32abb1SRussell King sfp->module_power_mW = 0; 211273970055SRussell King 211373970055SRussell King dev_info(sfp->dev, "module removed\n"); 211473970055SRussell King } 211573970055SRussell King 21166b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2117e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 211873970055SRussell King { 2119e85d81a1SRussell King switch (sfp->sm_dev_state) { 2120e85d81a1SRussell King default: 21216b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 21226b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 21236b0da5c9SRussell King break; 21246b0da5c9SRussell King 21256b0da5c9SRussell King case SFP_DEV_DOWN: 21266b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21276b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21286b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2129e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2130e85d81a1SRussell King break; 213173970055SRussell King 2132e85d81a1SRussell King case SFP_DEV_UP: 21336b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21346b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21356b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2136e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2137e85d81a1SRussell King break; 2138e85d81a1SRussell King } 2139e85d81a1SRussell King } 214073970055SRussell King 2141d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2142d900954fSRussell King * the on-board EEPROM, and sets up the power level. 214373970055SRussell King */ 2144e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2145e85d81a1SRussell King { 2146b036a554SRussell King int err; 2147b036a554SRussell King 2148b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2149b036a554SRussell King if (event == SFP_E_REMOVE) { 2150d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2151d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2152b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2153b036a554SRussell King return; 2154b036a554SRussell King } 2155b036a554SRussell King 2156b036a554SRussell King /* Handle device detach globally */ 215773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 215873f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2159b036a554SRussell King if (sfp->module_power_mW > 1000 && 2160b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2161b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 216273f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2163d2e816c0SRussell King return; 2164d2e816c0SRussell King } 2165d2e816c0SRussell King 216673970055SRussell King switch (sfp->sm_mod_state) { 216773970055SRussell King default: 2168e117be74SRussell King if (event == SFP_E_INSERT) { 2169d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2170e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2171e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2172e117be74SRussell King } 217373970055SRussell King break; 217473970055SRussell King 217573970055SRussell King case SFP_MOD_PROBE: 217673f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2177b036a554SRussell King if (event != SFP_E_TIMEOUT) 2178b036a554SRussell King break; 217973970055SRussell King 2180e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2181b036a554SRussell King if (err == -EAGAIN) { 2182e117be74SRussell King if (sfp->sm_mod_tries_init && 2183e117be74SRussell King --sfp->sm_mod_tries_init) { 2184e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2185b036a554SRussell King break; 2186e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2187e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2188e117be74SRussell King dev_warn(sfp->dev, 2189e117be74SRussell King "please wait, module slow to respond\n"); 2190e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2191e117be74SRussell King break; 2192e117be74SRussell King } 2193b036a554SRussell King } 2194b036a554SRussell King if (err < 0) { 2195b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2196b036a554SRussell King break; 2197b036a554SRussell King } 2198b036a554SRussell King 219938ecd706SRussell King err = sfp_hwmon_insert(sfp); 220038ecd706SRussell King if (err) 22019ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 22029ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 220338ecd706SRussell King 220473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2205df561f66SGustavo A. R. Silva fallthrough; 220673f5e847SRussell King case SFP_MOD_WAITDEV: 220773f5e847SRussell King /* Ensure that the device is attached before proceeding */ 220873f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 220973f5e847SRussell King break; 221073f5e847SRussell King 221173f5e847SRussell King /* Report the module insertion to the upstream device */ 221223571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 221323571c7bSRussell King (Oracle) sfp->quirk); 221473f5e847SRussell King if (err < 0) { 221573f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 221673f5e847SRussell King break; 221773f5e847SRussell King } 221873f5e847SRussell King 2219b036a554SRussell King /* If this is a power level 1 module, we are done */ 2220b036a554SRussell King if (sfp->module_power_mW <= 1000) 2221b036a554SRussell King goto insert; 2222b036a554SRussell King 2223b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2224df561f66SGustavo A. R. Silva fallthrough; 2225b036a554SRussell King case SFP_MOD_HPOWER: 2226b036a554SRussell King /* Enable high power mode */ 2227b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 222873f5e847SRussell King if (err < 0) { 222973f5e847SRussell King if (err != -EAGAIN) { 223073f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 22310936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 223273f5e847SRussell King } else { 2233e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 223473f5e847SRussell King } 223573f5e847SRussell King break; 223673f5e847SRussell King } 223773f5e847SRussell King 223873f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 223973970055SRussell King break; 224073970055SRussell King 2241b036a554SRussell King case SFP_MOD_WAITPWR: 2242b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2243b036a554SRussell King if (event != SFP_E_TIMEOUT) 2244b036a554SRussell King break; 2245b036a554SRussell King 2246b036a554SRussell King insert: 22470936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 22483bb35261SJon Nettleton break; 2249b036a554SRussell King 225073970055SRussell King case SFP_MOD_PRESENT: 225173970055SRussell King case SFP_MOD_ERROR: 225273970055SRussell King break; 225373970055SRussell King } 225473970055SRussell King } 225573970055SRussell King 2256e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2257e85d81a1SRussell King { 2258eefa6f1fSRussell King unsigned long timeout; 22591cb89a14SRussell King int ret; 2260eefa6f1fSRussell King 226173970055SRussell King /* Some events are global */ 226273970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 226373970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 226473970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 226573970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 226673970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 226773970055SRussell King sfp_sm_link_down(sfp); 226874c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 226974c551caSRussell King sfp_module_stop(sfp->sfp_bus); 227073970055SRussell King if (sfp->mod_phy) 227173970055SRussell King sfp_sm_phy_detach(sfp); 2272e85b1347SMarek Behún if (sfp->i2c_mii) 2273e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 22741539e0d3SRussell King sfp_module_tx_disable(sfp); 2275f3c9a666SRussell King sfp_soft_stop_poll(sfp); 227673970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 227773970055SRussell King return; 227873970055SRussell King } 227973970055SRussell King 228073970055SRussell King /* The main state machine */ 228173970055SRussell King switch (sfp->sm_state) { 228273970055SRussell King case SFP_S_DOWN: 2283eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2284eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2285eefa6f1fSRussell King break; 2286eefa6f1fSRussell King 2287f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2288f3c9a666SRussell King sfp_soft_start_poll(sfp); 2289f3c9a666SRussell King 2290f3c9a666SRussell King sfp_module_tx_enable(sfp); 2291eefa6f1fSRussell King 2292eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2293281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2294eefa6f1fSRussell King 2295eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2296eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2297324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2298324e88cbSMarek Behún * specific modules). 2299eefa6f1fSRussell King */ 2300324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2301eefa6f1fSRussell King break; 2302eefa6f1fSRussell King 2303eefa6f1fSRussell King case SFP_S_WAIT: 2304eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2305eefa6f1fSRussell King break; 2306eefa6f1fSRussell King 2307eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 230826c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 230926c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 231026c97a2dSRussell King * initialise, which is indicated by TX_FAULT 231126c97a2dSRussell King * deasserting. 2312181f29daSRussell King */ 231326c97a2dSRussell King timeout = sfp->module_t_start_up; 2314324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2315324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2316eefa6f1fSRussell King else 2317eefa6f1fSRussell King timeout = 1; 2318eefa6f1fSRussell King 2319eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2320eefa6f1fSRussell King } else { 2321eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2322eefa6f1fSRussell King * finished initialising. 2323eefa6f1fSRussell King */ 2324eefa6f1fSRussell King goto init_done; 2325181f29daSRussell King } 232673970055SRussell King break; 232773970055SRussell King 232873970055SRussell King case SFP_S_INIT: 2329d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2330e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 233126c97a2dSRussell King * or t_start_up, so assume there is a fault. 2332d23751a0SRussell King */ 2333d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2334281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2335d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 23361cb89a14SRussell King init_done: 2337e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2338e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2339e85b1347SMarek Behún if (ret < 0) { 2340e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2341e85b1347SMarek Behún break; 2342e85b1347SMarek Behún } 23431cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 23441cb89a14SRussell King goto phy_probe; 23451cb89a14SRussell King } 23461cb89a14SRussell King break; 23471cb89a14SRussell King 23481cb89a14SRussell King case SFP_S_INIT_PHY: 23491cb89a14SRussell King if (event != SFP_E_TIMEOUT) 23501cb89a14SRussell King break; 23511cb89a14SRussell King phy_probe: 23521cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2353d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2354d23751a0SRussell King */ 23551cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 23561cb89a14SRussell King if (ret == -ENODEV) { 23571cb89a14SRussell King if (--sfp->sm_phy_retries) { 23581cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 23591cb89a14SRussell King break; 23601cb89a14SRussell King } else { 23611cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 23621cb89a14SRussell King } 23631cb89a14SRussell King } else if (ret) { 2364256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2365256e43cbSRussell King break; 2366256e43cbSRussell King } 236774c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 236874c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 236974c551caSRussell King break; 237074c551caSRussell King } 2371d23751a0SRussell King sfp_sm_link_check_los(sfp); 2372d23751a0SRussell King 2373d23751a0SRussell King /* Reset the fault retry count */ 2374281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2375d23751a0SRussell King break; 2376d23751a0SRussell King 2377d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2378d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2379d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 238026c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2381d23751a0SRussell King } 238273970055SRussell King break; 238373970055SRussell King 238473970055SRussell King case SFP_S_WAIT_LOS: 238573970055SRussell King if (event == SFP_E_TX_FAULT) 238663ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2387710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 238873970055SRussell King sfp_sm_link_up(sfp); 238973970055SRussell King break; 239073970055SRussell King 239173970055SRussell King case SFP_S_LINK_UP: 239273970055SRussell King if (event == SFP_E_TX_FAULT) { 239373970055SRussell King sfp_sm_link_down(sfp); 239463ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2395710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 239673970055SRussell King sfp_sm_link_down(sfp); 239773970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 239873970055SRussell King } 239973970055SRussell King break; 240073970055SRussell King 240173970055SRussell King case SFP_S_TX_FAULT: 240273970055SRussell King if (event == SFP_E_TIMEOUT) { 240373970055SRussell King sfp_module_tx_fault_reset(sfp); 240426c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 240573970055SRussell King } 240673970055SRussell King break; 240773970055SRussell King 240873970055SRussell King case SFP_S_REINIT: 240973970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 241063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 241173970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 241273970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 241373970055SRussell King sfp_sm_link_check_los(sfp); 241473970055SRussell King } 241573970055SRussell King break; 241673970055SRussell King 241773970055SRussell King case SFP_S_TX_DISABLE: 241873970055SRussell King break; 241973970055SRussell King } 2420e85d81a1SRussell King } 2421e85d81a1SRussell King 2422e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2423e85d81a1SRussell King { 2424e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2425e85d81a1SRussell King 2426e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2427e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2428e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2429e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2430e85d81a1SRussell King event_to_str(event)); 2431e85d81a1SRussell King 2432e85d81a1SRussell King sfp_sm_device(sfp, event); 24336b0da5c9SRussell King sfp_sm_module(sfp, event); 2434e85d81a1SRussell King sfp_sm_main(sfp, event); 243573970055SRussell King 24364005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 24374005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 24384005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 24394005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 244073970055SRussell King 244173970055SRussell King mutex_unlock(&sfp->sm_mutex); 244273970055SRussell King } 244373970055SRussell King 2444b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2445b5bfc21aSRussell King { 24466b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2447b5bfc21aSRussell King } 2448b5bfc21aSRussell King 2449b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2450b5bfc21aSRussell King { 24516b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2452b5bfc21aSRussell King } 2453b5bfc21aSRussell King 245473970055SRussell King static void sfp_start(struct sfp *sfp) 245573970055SRussell King { 245673970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 245773970055SRussell King } 245873970055SRussell King 245973970055SRussell King static void sfp_stop(struct sfp *sfp) 246073970055SRussell King { 246173970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 246273970055SRussell King } 246373970055SRussell King 246473970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 246573970055SRussell King { 246673970055SRussell King /* locking... and check module is present */ 246773970055SRussell King 2468ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2469ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 247073970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 247173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 247273970055SRussell King } else { 247373970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 247473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 247573970055SRussell King } 247673970055SRussell King return 0; 247773970055SRussell King } 247873970055SRussell King 247973970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 248073970055SRussell King u8 *data) 248173970055SRussell King { 248273970055SRussell King unsigned int first, last, len; 248373970055SRussell King int ret; 248473970055SRussell King 248573970055SRussell King if (ee->len == 0) 248673970055SRussell King return -EINVAL; 248773970055SRussell King 248873970055SRussell King first = ee->offset; 248973970055SRussell King last = ee->offset + ee->len; 249073970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 249173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 249273970055SRussell King len -= first; 249373970055SRussell King 24942794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 249573970055SRussell King if (ret < 0) 249673970055SRussell King return ret; 249773970055SRussell King 249873970055SRussell King first += len; 249973970055SRussell King data += len; 250073970055SRussell King } 25012794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 250273970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 250373970055SRussell King len -= first; 250473970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 250573970055SRussell King 25062794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 250773970055SRussell King if (ret < 0) 250873970055SRussell King return ret; 250973970055SRussell King } 251073970055SRussell King return 0; 251173970055SRussell King } 251273970055SRussell King 2513d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2514d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2515d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2516d740513fSAndrew Lunn { 2517d740513fSAndrew Lunn if (page->bank) { 2518d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2519d740513fSAndrew Lunn return -EOPNOTSUPP; 2520d740513fSAndrew Lunn } 2521d740513fSAndrew Lunn 2522d740513fSAndrew Lunn if (page->page) { 2523d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2524d740513fSAndrew Lunn return -EOPNOTSUPP; 2525d740513fSAndrew Lunn } 2526d740513fSAndrew Lunn 2527d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2528d740513fSAndrew Lunn page->i2c_address != 0x51) { 2529d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2530d740513fSAndrew Lunn return -EOPNOTSUPP; 2531d740513fSAndrew Lunn } 2532d740513fSAndrew Lunn 2533d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2534d740513fSAndrew Lunn page->data, page->length); 2535d740513fSAndrew Lunn }; 2536d740513fSAndrew Lunn 253773970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2538b5bfc21aSRussell King .attach = sfp_attach, 2539b5bfc21aSRussell King .detach = sfp_detach, 254073970055SRussell King .start = sfp_start, 254173970055SRussell King .stop = sfp_stop, 254273970055SRussell King .module_info = sfp_module_info, 254373970055SRussell King .module_eeprom = sfp_module_eeprom, 2544d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 254573970055SRussell King }; 254673970055SRussell King 254773970055SRussell King static void sfp_timeout(struct work_struct *work) 254873970055SRussell King { 254973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 255073970055SRussell King 255173970055SRussell King rtnl_lock(); 255273970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 255373970055SRussell King rtnl_unlock(); 255473970055SRussell King } 255573970055SRussell King 255673970055SRussell King static void sfp_check_state(struct sfp *sfp) 255773970055SRussell King { 255873970055SRussell King unsigned int state, i, changed; 255973970055SRussell King 25602158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 256173970055SRussell King state = sfp_get_state(sfp); 256273970055SRussell King changed = state ^ sfp->state; 25632069624dSMatthew Hagan if (sfp->tx_fault_ignore) 25642069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 25652069624dSMatthew Hagan else 256673970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 256773970055SRussell King 256873970055SRussell King for (i = 0; i < GPIO_MAX; i++) 256973970055SRussell King if (changed & BIT(i)) 257073970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 257173970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 257273970055SRussell King 257373970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 257473970055SRussell King sfp->state = state; 257573970055SRussell King 257673970055SRussell King rtnl_lock(); 257773970055SRussell King if (changed & SFP_F_PRESENT) 257873970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 257973970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 258073970055SRussell King 258173970055SRussell King if (changed & SFP_F_TX_FAULT) 258273970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 258373970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 258473970055SRussell King 258573970055SRussell King if (changed & SFP_F_LOS) 258673970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 258773970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 258873970055SRussell King rtnl_unlock(); 25892158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 259073970055SRussell King } 259173970055SRussell King 259273970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 259373970055SRussell King { 259473970055SRussell King struct sfp *sfp = data; 259573970055SRussell King 259673970055SRussell King sfp_check_state(sfp); 259773970055SRussell King 259873970055SRussell King return IRQ_HANDLED; 259973970055SRussell King } 260073970055SRussell King 260173970055SRussell King static void sfp_poll(struct work_struct *work) 260273970055SRussell King { 260373970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 260473970055SRussell King 260573970055SRussell King sfp_check_state(sfp); 2606f3c9a666SRussell King 2607f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2608f3c9a666SRussell King sfp->need_poll) 260973970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 261073970055SRussell King } 261173970055SRussell King 261273970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 261373970055SRussell King { 261473970055SRussell King struct sfp *sfp; 261573970055SRussell King 261673970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 261773970055SRussell King if (!sfp) 261873970055SRussell King return ERR_PTR(-ENOMEM); 261973970055SRussell King 262073970055SRussell King sfp->dev = dev; 262173970055SRussell King 262273970055SRussell King mutex_init(&sfp->sm_mutex); 26232158e856SRobert Hancock mutex_init(&sfp->st_mutex); 262473970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 262573970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 262673970055SRussell King 2627139d3a21SRussell King sfp_hwmon_init(sfp); 2628139d3a21SRussell King 262973970055SRussell King return sfp; 263073970055SRussell King } 263173970055SRussell King 263273970055SRussell King static void sfp_cleanup(void *data) 263373970055SRussell King { 263473970055SRussell King struct sfp *sfp = data; 263573970055SRussell King 2636139d3a21SRussell King sfp_hwmon_exit(sfp); 2637139d3a21SRussell King 263873970055SRussell King cancel_delayed_work_sync(&sfp->poll); 263973970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 264073970055SRussell King if (sfp->i2c_mii) { 264173970055SRussell King mdiobus_unregister(sfp->i2c_mii); 264273970055SRussell King mdiobus_free(sfp->i2c_mii); 264373970055SRussell King } 264473970055SRussell King if (sfp->i2c) 264573970055SRussell King i2c_put_adapter(sfp->i2c); 264673970055SRussell King kfree(sfp); 264773970055SRussell King } 264873970055SRussell King 264973970055SRussell King static int sfp_probe(struct platform_device *pdev) 265073970055SRussell King { 2651259c8618SRussell King const struct sff_data *sff; 26527ce236faSRuslan Babayev struct i2c_adapter *i2c; 26535411ca71SChris Healy char *sfp_irq_name; 265473970055SRussell King struct sfp *sfp; 2655257c2559SRobert Hancock int err, i; 265673970055SRussell King 265773970055SRussell King sfp = sfp_alloc(&pdev->dev); 265873970055SRussell King if (IS_ERR(sfp)) 265973970055SRussell King return PTR_ERR(sfp); 266073970055SRussell King 266173970055SRussell King platform_set_drvdata(pdev, sfp); 266273970055SRussell King 26630a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 266473970055SRussell King if (err < 0) 266573970055SRussell King return err; 266673970055SRussell King 2667259c8618SRussell King sff = sfp->type = &sfp_data; 2668259c8618SRussell King 266973970055SRussell King if (pdev->dev.of_node) { 267073970055SRussell King struct device_node *node = pdev->dev.of_node; 2671259c8618SRussell King const struct of_device_id *id; 267273970055SRussell King struct device_node *np; 267373970055SRussell King 2674259c8618SRussell King id = of_match_node(sfp_of_match, node); 2675259c8618SRussell King if (WARN_ON(!id)) 2676259c8618SRussell King return -EINVAL; 2677259c8618SRussell King 2678259c8618SRussell King sff = sfp->type = id->data; 2679259c8618SRussell King 268073970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 268166ede1f9SAntoine Tenart if (!np) { 268266ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 268366ede1f9SAntoine Tenart return -ENODEV; 268466ede1f9SAntoine Tenart } 268573970055SRussell King 268673970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 268773970055SRussell King of_node_put(np); 26887ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 26897ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 26907ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 26917ce236faSRuslan Babayev struct fwnode_reference_args args; 26927ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 26937ce236faSRuslan Babayev int ret; 26947ce236faSRuslan Babayev 26957ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 26961086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 26977ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 26987ce236faSRuslan Babayev return -ENODEV; 26997ce236faSRuslan Babayev } 27007ce236faSRuslan Babayev 27017ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 27027ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 27037ce236faSRuslan Babayev } else { 27047ce236faSRuslan Babayev return -EINVAL; 27057ce236faSRuslan Babayev } 27067ce236faSRuslan Babayev 270773970055SRussell King if (!i2c) 270873970055SRussell King return -EPROBE_DEFER; 270973970055SRussell King 271073970055SRussell King err = sfp_i2c_configure(sfp, i2c); 271173970055SRussell King if (err < 0) { 271273970055SRussell King i2c_put_adapter(i2c); 271373970055SRussell King return err; 271473970055SRussell King } 271573970055SRussell King 2716259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2717259c8618SRussell King if (sff->gpios & BIT(i)) { 271873970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 271973970055SRussell King gpio_of_names[i], gpio_flags[i]); 272073970055SRussell King if (IS_ERR(sfp->gpio[i])) 272173970055SRussell King return PTR_ERR(sfp->gpio[i]); 272273970055SRussell King } 272373970055SRussell King 27248475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 27258475c4b7SRussell King (Oracle) 272673970055SRussell King sfp->get_state = sfp_gpio_get_state; 272773970055SRussell King sfp->set_state = sfp_gpio_set_state; 2728259c8618SRussell King 2729259c8618SRussell King /* Modules that have no detect signal are always present */ 2730259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2731259c8618SRussell King sfp->get_state = sff_gpio_get_state; 273273970055SRussell King 27333bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 27343bb35261SJon Nettleton &sfp->max_power_mW); 273502eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 273602eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 273702eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 273802eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 27393bb35261SJon Nettleton sfp->max_power_mW = 1000; 274002eaf5a7SRussell King (Oracle) } 27413bb35261SJon Nettleton 27423bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 27433bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 27443bb35261SJon Nettleton 274573970055SRussell King /* Get the initial state, and always signal TX disable, 274673970055SRussell King * since the network interface will not be up. 274773970055SRussell King */ 274873970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 274973970055SRussell King 275073970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 275173970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 275273970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 275373970055SRussell King sfp_set_state(sfp, sfp->state); 275473970055SRussell King sfp_module_tx_disable(sfp); 275573f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 275673f5e847SRussell King rtnl_lock(); 275773f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 275873f5e847SRussell King rtnl_unlock(); 275973f5e847SRussell King } 276073970055SRussell King 276173970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 276273970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 276373970055SRussell King continue; 276473970055SRussell King 2765257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 276696216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 276796216181SYueHaibing sfp->gpio_irq[i] = 0; 2768f3c9a666SRussell King sfp->need_poll = true; 276973970055SRussell King continue; 277073970055SRussell King } 277173970055SRussell King 27725411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 27735411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 27745411ca71SChris Healy gpio_of_names[i]); 27755411ca71SChris Healy 27768cb601f1SChris Healy if (!sfp_irq_name) 27778cb601f1SChris Healy return -ENOMEM; 27788cb601f1SChris Healy 2779257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2780257c2559SRobert Hancock NULL, sfp_irq, 278173970055SRussell King IRQF_ONESHOT | 278273970055SRussell King IRQF_TRIGGER_RISING | 278373970055SRussell King IRQF_TRIGGER_FALLING, 27845411ca71SChris Healy sfp_irq_name, sfp); 2785257c2559SRobert Hancock if (err) { 2786257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2787f3c9a666SRussell King sfp->need_poll = true; 278873970055SRussell King } 2789257c2559SRobert Hancock } 279073970055SRussell King 2791f3c9a666SRussell King if (sfp->need_poll) 279273970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 279373970055SRussell King 2794a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2795a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2796a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2797a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2798a1f5d1f0SAntoine Tenart */ 2799a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2800a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2801a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2802a1f5d1f0SAntoine Tenart 2803b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2804b5bfc21aSRussell King if (!sfp->sfp_bus) 2805b5bfc21aSRussell King return -ENOMEM; 2806b5bfc21aSRussell King 28079cc8976cSRussell King sfp_debugfs_init(sfp); 28089cc8976cSRussell King 280973970055SRussell King return 0; 281073970055SRussell King } 281173970055SRussell King 281273970055SRussell King static int sfp_remove(struct platform_device *pdev) 281373970055SRussell King { 281473970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 281573970055SRussell King 28169cc8976cSRussell King sfp_debugfs_exit(sfp); 281773970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 281873970055SRussell King 28190cb96b57SRussell King rtnl_lock(); 28200cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 28210cb96b57SRussell King rtnl_unlock(); 28220cb96b57SRussell King 282373970055SRussell King return 0; 282473970055SRussell King } 282573970055SRussell King 2826257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2827257c2559SRobert Hancock { 2828257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2829257c2559SRobert Hancock int i; 2830257c2559SRobert Hancock 2831257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2832257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2833257c2559SRobert Hancock continue; 2834257c2559SRobert Hancock 2835257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2836257c2559SRobert Hancock } 2837257c2559SRobert Hancock 2838257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2839257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2840257c2559SRobert Hancock } 2841257c2559SRobert Hancock 284273970055SRussell King static struct platform_driver sfp_driver = { 284373970055SRussell King .probe = sfp_probe, 284473970055SRussell King .remove = sfp_remove, 2845257c2559SRobert Hancock .shutdown = sfp_shutdown, 284673970055SRussell King .driver = { 284773970055SRussell King .name = "sfp", 284873970055SRussell King .of_match_table = sfp_of_match, 284973970055SRussell King }, 285073970055SRussell King }; 285173970055SRussell King 285273970055SRussell King static int sfp_init(void) 285373970055SRussell King { 285473970055SRussell King poll_jiffies = msecs_to_jiffies(100); 285573970055SRussell King 285673970055SRussell King return platform_driver_register(&sfp_driver); 285773970055SRussell King } 285873970055SRussell King module_init(sfp_init); 285973970055SRussell King 286073970055SRussell King static void sfp_exit(void) 286173970055SRussell King { 286273970055SRussell King platform_driver_unregister(&sfp_driver); 286373970055SRussell King } 286473970055SRussell King module_exit(sfp_exit); 286573970055SRussell King 286673970055SRussell King MODULE_ALIAS("platform:sfp"); 286773970055SRussell King MODULE_AUTHOR("Russell King"); 286873970055SRussell King MODULE_LICENSE("GPL v2"); 2869