1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 29cc8976cSRussell King #include <linux/debugfs.h> 373970055SRussell King #include <linux/delay.h> 454a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 51323061aSAndrew Lunn #include <linux/hwmon.h> 673970055SRussell King #include <linux/i2c.h> 773970055SRussell King #include <linux/interrupt.h> 873970055SRussell King #include <linux/jiffies.h> 9fcba68bdSAndrew Lunn #include <linux/mdio/mdio-i2c.h> 1073970055SRussell King #include <linux/module.h> 1173970055SRussell King #include <linux/mutex.h> 1273970055SRussell King #include <linux/of.h> 1373970055SRussell King #include <linux/phy.h> 1473970055SRussell King #include <linux/platform_device.h> 1573970055SRussell King #include <linux/rtnetlink.h> 1673970055SRussell King #include <linux/slab.h> 1773970055SRussell King #include <linux/workqueue.h> 1873970055SRussell King 1973970055SRussell King #include "sfp.h" 2073970055SRussell King #include "swphy.h" 2173970055SRussell King 2273970055SRussell King enum { 2373970055SRussell King GPIO_MODDEF0, 2473970055SRussell King GPIO_LOS, 2573970055SRussell King GPIO_TX_FAULT, 2673970055SRussell King GPIO_TX_DISABLE, 27*fc082b39SRussell King (Oracle) GPIO_RS0, 28*fc082b39SRussell King (Oracle) GPIO_RS1, 2973970055SRussell King GPIO_MAX, 3073970055SRussell King 3173970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3273970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3373970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3473970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 35*fc082b39SRussell King (Oracle) SFP_F_RS0 = BIT(GPIO_RS0), 36*fc082b39SRussell King (Oracle) SFP_F_RS1 = BIT(GPIO_RS1), 37*fc082b39SRussell King (Oracle) 38*fc082b39SRussell King (Oracle) SFP_F_OUTPUTS = SFP_F_TX_DISABLE | SFP_F_RS0 | SFP_F_RS1, 3973970055SRussell King 4073970055SRussell King SFP_E_INSERT = 0, 4173970055SRussell King SFP_E_REMOVE, 426b0da5c9SRussell King SFP_E_DEV_ATTACH, 436b0da5c9SRussell King SFP_E_DEV_DETACH, 4473970055SRussell King SFP_E_DEV_DOWN, 4573970055SRussell King SFP_E_DEV_UP, 4673970055SRussell King SFP_E_TX_FAULT, 4773970055SRussell King SFP_E_TX_CLEAR, 4873970055SRussell King SFP_E_LOS_HIGH, 4973970055SRussell King SFP_E_LOS_LOW, 5073970055SRussell King SFP_E_TIMEOUT, 5173970055SRussell King 5273970055SRussell King SFP_MOD_EMPTY = 0, 5373f5e847SRussell King SFP_MOD_ERROR, 5473970055SRussell King SFP_MOD_PROBE, 5573f5e847SRussell King SFP_MOD_WAITDEV, 563bb35261SJon Nettleton SFP_MOD_HPOWER, 57b036a554SRussell King SFP_MOD_WAITPWR, 5873970055SRussell King SFP_MOD_PRESENT, 5973970055SRussell King 606b0da5c9SRussell King SFP_DEV_DETACHED = 0, 616b0da5c9SRussell King SFP_DEV_DOWN, 6273970055SRussell King SFP_DEV_UP, 6373970055SRussell King 6473970055SRussell King SFP_S_DOWN = 0, 6574c551caSRussell King SFP_S_FAIL, 66eefa6f1fSRussell King SFP_S_WAIT, 6773970055SRussell King SFP_S_INIT, 681cb89a14SRussell King SFP_S_INIT_PHY, 69d23751a0SRussell King SFP_S_INIT_TX_FAULT, 7073970055SRussell King SFP_S_WAIT_LOS, 7173970055SRussell King SFP_S_LINK_UP, 7273970055SRussell King SFP_S_TX_FAULT, 7373970055SRussell King SFP_S_REINIT, 7473970055SRussell King SFP_S_TX_DISABLE, 7573970055SRussell King }; 7673970055SRussell King 774005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 784005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7973f5e847SRussell King [SFP_MOD_ERROR] = "error", 804005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 8173f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 824005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 83b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 844005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 854005a7cbSAndrew Lunn }; 864005a7cbSAndrew Lunn 874005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 884005a7cbSAndrew Lunn { 894005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 904005a7cbSAndrew Lunn return "Unknown module state"; 914005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 924005a7cbSAndrew Lunn } 934005a7cbSAndrew Lunn 944005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 956b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 964005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 974005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 984005a7cbSAndrew Lunn }; 994005a7cbSAndrew Lunn 1004005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 1014005a7cbSAndrew Lunn { 1024005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 1034005a7cbSAndrew Lunn return "Unknown device state"; 1044005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1054005a7cbSAndrew Lunn } 1064005a7cbSAndrew Lunn 1074005a7cbSAndrew Lunn static const char * const event_strings[] = { 1084005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1094005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1106b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1116b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1124005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1134005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1144005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1154005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1164005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1174005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1184005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1194005a7cbSAndrew Lunn }; 1204005a7cbSAndrew Lunn 1214005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1224005a7cbSAndrew Lunn { 1234005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1244005a7cbSAndrew Lunn return "Unknown event"; 1254005a7cbSAndrew Lunn return event_strings[event]; 1264005a7cbSAndrew Lunn } 1274005a7cbSAndrew Lunn 1284005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1294005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 13074c551caSRussell King [SFP_S_FAIL] = "fail", 131eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1324005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1331cb89a14SRussell King [SFP_S_INIT_PHY] = "init_phy", 134d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1354005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1364005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1374005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1384005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 13925a9da66SSean Anderson [SFP_S_TX_DISABLE] = "tx_disable", 1404005a7cbSAndrew Lunn }; 1414005a7cbSAndrew Lunn 1424005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1434005a7cbSAndrew Lunn { 1444005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1454005a7cbSAndrew Lunn return "Unknown state"; 1464005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1474005a7cbSAndrew Lunn } 1484005a7cbSAndrew Lunn 149f35cb547SRussell King (Oracle) static const char *gpio_names[] = { 15025ee0793SBaruch Siach "mod-def0", 15173970055SRussell King "los", 15273970055SRussell King "tx-fault", 15373970055SRussell King "tx-disable", 15425ee0793SBaruch Siach "rate-select0", 155*fc082b39SRussell King (Oracle) "rate-select1", 15673970055SRussell King }; 15773970055SRussell King 15873970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15973970055SRussell King GPIOD_IN, 16073970055SRussell King GPIOD_IN, 16173970055SRussell King GPIOD_IN, 16273970055SRussell King GPIOD_ASIS, 16373970055SRussell King GPIOD_ASIS, 164*fc082b39SRussell King (Oracle) GPIOD_ASIS, 16573970055SRussell King }; 16673970055SRussell King 16726c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16826c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16926c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 17026c97a2dSRussell King * on board (for a copper SFP) time to initialise. 17126c97a2dSRussell King */ 172eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 173324e88cbSMarek Behún #define T_WAIT_ROLLBALL msecs_to_jiffies(25000) 17426c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 17526c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17626c97a2dSRussell King 17726c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17826c97a2dSRussell King * an indicated TX_FAULT. 17926c97a2dSRussell King */ 18073970055SRussell King #define T_RESET_US 10 18173970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 18273970055SRussell King 18365ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 18465ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 18565ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18665ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18765ef2d5cSRussell King */ 18865ef2d5cSRussell King #define N_FAULT_INIT 5 18965ef2d5cSRussell King #define N_FAULT 5 19065ef2d5cSRussell King 1911cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1921cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1931cb89a14SRussell King */ 1941cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1951cb89a14SRussell King #define R_PHY_RETRY 12 1961cb89a14SRussell King 19773970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19873970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19973970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 20073970055SRussell King * 201d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 202d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 20373970055SRussell King */ 204d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 2053bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 206e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 207e117be74SRussell King #define R_PROBE_RETRY_INIT 10 208e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 209e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 21073970055SRussell King 211516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 21273970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 213324e88cbSMarek Behún * RollBall SFPs access phy via SFP Enhanced Digital Diagnostic Interface 214324e88cbSMarek Behún * via address 0x51 (mdio-i2c will use RollBall protocol on this address). 21573970055SRussell King */ 21673970055SRussell King #define SFP_PHY_ADDR 22 217324e88cbSMarek Behún #define SFP_PHY_ADDR_ROLLBALL 17 21873970055SRussell King 219813c2dd7SIvan Bornyakov /* SFP_EEPROM_BLOCK_SIZE is the size of data chunk to read the EEPROM 220813c2dd7SIvan Bornyakov * at a time. Some SFP modules and also some Linux I2C drivers do not like 221813c2dd7SIvan Bornyakov * reads longer than 16 bytes. 222813c2dd7SIvan Bornyakov */ 223813c2dd7SIvan Bornyakov #define SFP_EEPROM_BLOCK_SIZE 16 224813c2dd7SIvan Bornyakov 225259c8618SRussell King struct sff_data { 226259c8618SRussell King unsigned int gpios; 227259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 228259c8618SRussell King }; 229259c8618SRussell King 23073970055SRussell King struct sfp { 23173970055SRussell King struct device *dev; 23273970055SRussell King struct i2c_adapter *i2c; 23373970055SRussell King struct mii_bus *i2c_mii; 23473970055SRussell King struct sfp_bus *sfp_bus; 235e85b1347SMarek Behún enum mdio_i2c_proto mdio_protocol; 23673970055SRussell King struct phy_device *mod_phy; 237259c8618SRussell King const struct sff_data *type; 2380d035bedSRussell King size_t i2c_block_size; 2393bb35261SJon Nettleton u32 max_power_mW; 24073970055SRussell King 24173970055SRussell King unsigned int (*get_state)(struct sfp *); 24273970055SRussell King void (*set_state)(struct sfp *, unsigned int); 24373970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2443bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 24573970055SRussell King 24673970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 247257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 24873970055SRussell King 249f3c9a666SRussell King bool need_poll; 250f3c9a666SRussell King 2511974fd3bSRussell King (Oracle) /* Access rules: 2521974fd3bSRussell King (Oracle) * state_hw_drive: st_mutex held 2531974fd3bSRussell King (Oracle) * state_hw_mask: st_mutex held 2541974fd3bSRussell King (Oracle) * state_soft_mask: st_mutex held 2551974fd3bSRussell King (Oracle) * state: st_mutex held unless reading input bits 2561974fd3bSRussell King (Oracle) */ 2572158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 258*fc082b39SRussell King (Oracle) unsigned int state_hw_drive; 2598475c4b7SRussell King (Oracle) unsigned int state_hw_mask; 260f3c9a666SRussell King unsigned int state_soft_mask; 26173970055SRussell King unsigned int state; 2621974fd3bSRussell King (Oracle) 26373970055SRussell King struct delayed_work poll; 26473970055SRussell King struct delayed_work timeout; 2652158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 26673970055SRussell King unsigned char sm_mod_state; 267e117be74SRussell King unsigned char sm_mod_tries_init; 268e117be74SRussell King unsigned char sm_mod_tries; 26973970055SRussell King unsigned char sm_dev_state; 27073970055SRussell King unsigned short sm_state; 271281e4eabSRussell King unsigned char sm_fault_retries; 2721cb89a14SRussell King unsigned char sm_phy_retries; 27373970055SRussell King 27473970055SRussell King struct sfp_eeprom_id id; 275ed32abb1SRussell King unsigned int module_power_mW; 27626c97a2dSRussell King unsigned int module_t_start_up; 277324e88cbSMarek Behún unsigned int module_t_wait; 278f94b9bedSRussell King (Oracle) 279*fc082b39SRussell King (Oracle) unsigned int rate_kbd; 280*fc082b39SRussell King (Oracle) unsigned int rs_threshold_kbd; 281*fc082b39SRussell King (Oracle) unsigned int rs_state_mask; 282*fc082b39SRussell King (Oracle) 283f94b9bedSRussell King (Oracle) bool have_a2; 2842069624dSMatthew Hagan bool tx_fault_ignore; 285ed32abb1SRussell King 28623571c7bSRussell King (Oracle) const struct sfp_quirk *quirk; 28723571c7bSRussell King (Oracle) 2881323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2891323061aSAndrew Lunn struct sfp_diag diag; 290139d3a21SRussell King struct delayed_work hwmon_probe; 291139d3a21SRussell King unsigned int hwmon_tries; 2921323061aSAndrew Lunn struct device *hwmon_dev; 2931323061aSAndrew Lunn char *hwmon_name; 2941323061aSAndrew Lunn #endif 2951323061aSAndrew Lunn 2969cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2979cc8976cSRussell King struct dentry *debugfs_dir; 2989cc8976cSRussell King #endif 29973970055SRussell King }; 30073970055SRussell King 301259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 302259c8618SRussell King { 3030fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 304259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 305259c8618SRussell King } 306259c8618SRussell King 307259c8618SRussell King static const struct sff_data sff_data = { 308259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 309259c8618SRussell King .module_supported = sff_module_supported, 310259c8618SRussell King }; 311259c8618SRussell King 312259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 313259c8618SRussell King { 314f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 315f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 316f0b4f847SPali Rohár return true; 317f0b4f847SPali Rohár 318f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 319f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 320f0b4f847SPali Rohár * as supported based on vendor name and pn match. 321f0b4f847SPali Rohár */ 322f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 323f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 324f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 325f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 326f0b4f847SPali Rohár return true; 327f0b4f847SPali Rohár 328f0b4f847SPali Rohár return false; 329259c8618SRussell King } 330259c8618SRussell King 331259c8618SRussell King static const struct sff_data sfp_data = { 332259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 333*fc082b39SRussell King (Oracle) SFP_F_TX_DISABLE | SFP_F_RS0 | SFP_F_RS1, 334259c8618SRussell King .module_supported = sfp_module_supported, 335259c8618SRussell King }; 336259c8618SRussell King 337259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 338259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 339259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 340259c8618SRussell King { }, 341259c8618SRussell King }; 342259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 343259c8618SRussell King 34427541675SRussell King (Oracle) static void sfp_fixup_long_startup(struct sfp *sfp) 34527541675SRussell King (Oracle) { 34627541675SRussell King (Oracle) sfp->module_t_start_up = T_START_UP_BAD_GPON; 34727541675SRussell King (Oracle) } 34827541675SRussell King (Oracle) 3495029be76SRussell King (Oracle) static void sfp_fixup_ignore_tx_fault(struct sfp *sfp) 3505029be76SRussell King (Oracle) { 3515029be76SRussell King (Oracle) sfp->tx_fault_ignore = true; 3525029be76SRussell King (Oracle) } 3535029be76SRussell King (Oracle) 35473472c83SRussell King (Oracle) static void sfp_fixup_halny_gsfp(struct sfp *sfp) 35573472c83SRussell King (Oracle) { 35673472c83SRussell King (Oracle) /* Ignore the TX_FAULT and LOS signals on this module. 35773472c83SRussell King (Oracle) * these are possibly used for other purposes on this 35873472c83SRussell King (Oracle) * module, e.g. a serial port. 35973472c83SRussell King (Oracle) */ 36073472c83SRussell King (Oracle) sfp->state_hw_mask &= ~(SFP_F_TX_FAULT | SFP_F_LOS); 36173472c83SRussell King (Oracle) } 36273472c83SRussell King (Oracle) 363324e88cbSMarek Behún static void sfp_fixup_rollball(struct sfp *sfp) 364324e88cbSMarek Behún { 365324e88cbSMarek Behún sfp->mdio_protocol = MDIO_I2C_ROLLBALL; 366324e88cbSMarek Behún sfp->module_t_wait = T_WAIT_ROLLBALL; 367324e88cbSMarek Behún } 368324e88cbSMarek Behún 369324e88cbSMarek Behún static void sfp_fixup_rollball_cc(struct sfp *sfp) 370324e88cbSMarek Behún { 371324e88cbSMarek Behún sfp_fixup_rollball(sfp); 372324e88cbSMarek Behún 373324e88cbSMarek Behún /* Some RollBall SFPs may have wrong (zero) extended compliance code 374324e88cbSMarek Behún * burned in EEPROM. For PHY probing we need the correct one. 375324e88cbSMarek Behún */ 376324e88cbSMarek Behún sfp->id.base.extended_cc = SFF8024_ECC_10GBASE_T_SFI; 377324e88cbSMarek Behún } 378324e88cbSMarek Behún 37923571c7bSRussell King (Oracle) static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id, 380fd580c98SRussell King unsigned long *modes, 381fd580c98SRussell King unsigned long *interfaces) 38223571c7bSRussell King (Oracle) { 38323571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, modes); 384fd580c98SRussell King __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 38523571c7bSRussell King (Oracle) } 38623571c7bSRussell King (Oracle) 38750e96acbSRussell King (Oracle) static void sfp_quirk_disable_autoneg(const struct sfp_eeprom_id *id, 38850e96acbSRussell King (Oracle) unsigned long *modes, 38950e96acbSRussell King (Oracle) unsigned long *interfaces) 39050e96acbSRussell King (Oracle) { 39150e96acbSRussell King (Oracle) linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, modes); 39250e96acbSRussell King (Oracle) } 39350e96acbSRussell King (Oracle) 39450e96acbSRussell King (Oracle) static void sfp_quirk_oem_2_5g(const struct sfp_eeprom_id *id, 39550e96acbSRussell King (Oracle) unsigned long *modes, 39650e96acbSRussell King (Oracle) unsigned long *interfaces) 39750e96acbSRussell King (Oracle) { 39850e96acbSRussell King (Oracle) /* Copper 2.5G SFP */ 39950e96acbSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, modes); 40050e96acbSRussell King (Oracle) __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 40150e96acbSRussell King (Oracle) sfp_quirk_disable_autoneg(id, modes, interfaces); 40250e96acbSRussell King (Oracle) } 40350e96acbSRussell King (Oracle) 40423571c7bSRussell King (Oracle) static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id, 405fd580c98SRussell King unsigned long *modes, 406fd580c98SRussell King unsigned long *interfaces) 40723571c7bSRussell King (Oracle) { 40823571c7bSRussell King (Oracle) /* Ubiquiti U-Fiber Instant module claims that support all transceiver 40923571c7bSRussell King (Oracle) * types including 10G Ethernet which is not truth. So clear all claimed 41023571c7bSRussell King (Oracle) * modes and set only one mode which module supports: 1000baseX_Full. 41123571c7bSRussell King (Oracle) */ 41223571c7bSRussell King (Oracle) linkmode_zero(modes); 41323571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, modes); 41423571c7bSRussell King (Oracle) } 41523571c7bSRussell King (Oracle) 41613c8adcfSMarek Behún #define SFP_QUIRK(_v, _p, _m, _f) \ 41713c8adcfSMarek Behún { .vendor = _v, .part = _p, .modes = _m, .fixup = _f, } 41813c8adcfSMarek Behún #define SFP_QUIRK_M(_v, _p, _m) SFP_QUIRK(_v, _p, _m, NULL) 41913c8adcfSMarek Behún #define SFP_QUIRK_F(_v, _p, _f) SFP_QUIRK(_v, _p, NULL, _f) 42013c8adcfSMarek Behún 42123571c7bSRussell King (Oracle) static const struct sfp_quirk sfp_quirks[] = { 42213c8adcfSMarek Behún // Alcatel Lucent G-010S-P can operate at 2500base-X, but incorrectly 42313c8adcfSMarek Behún // report 2500MBd NRZ in their EEPROM 42413c8adcfSMarek Behún SFP_QUIRK_M("ALCATELLUCENT", "G010SP", sfp_quirk_2500basex), 42513c8adcfSMarek Behún 42613c8adcfSMarek Behún // Alcatel Lucent G-010S-A can operate at 2500base-X, but report 3.2GBd 42723571c7bSRussell King (Oracle) // NRZ in their EEPROM 42813c8adcfSMarek Behún SFP_QUIRK("ALCATELLUCENT", "3FE46541AA", sfp_quirk_2500basex, 42913c8adcfSMarek Behún sfp_fixup_long_startup), 43013c8adcfSMarek Behún 43113c8adcfSMarek Behún SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp), 43213c8adcfSMarek Behún 433ad651d68SDaniel Golle // HG MXPD-483II-F 2.5G supports 2500Base-X, but incorrectly reports 434ad651d68SDaniel Golle // 2600MBd in their EERPOM 435ad651d68SDaniel Golle SFP_QUIRK_M("HG GENUINE", "MXPD-483II", sfp_quirk_2500basex), 436ad651d68SDaniel Golle 43713c8adcfSMarek Behún // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in 43813c8adcfSMarek Behún // their EEPROM 43913c8adcfSMarek Behún SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex, 44013c8adcfSMarek Behún sfp_fixup_ignore_tx_fault), 44113c8adcfSMarek Behún 44213c8adcfSMarek Behún // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report 44313c8adcfSMarek Behún // 2500MBd NRZ in their EEPROM 44413c8adcfSMarek Behún SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex), 44513c8adcfSMarek Behún 44613c8adcfSMarek Behún SFP_QUIRK_M("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant), 447324e88cbSMarek Behún 448324e88cbSMarek Behún SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc), 44950e96acbSRussell King (Oracle) SFP_QUIRK_M("OEM", "SFP-2.5G-T", sfp_quirk_oem_2_5g), 450324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc), 451324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc), 452324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), 453324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), 45423571c7bSRussell King (Oracle) }; 45523571c7bSRussell King (Oracle) 45623571c7bSRussell King (Oracle) static size_t sfp_strlen(const char *str, size_t maxlen) 45723571c7bSRussell King (Oracle) { 45823571c7bSRussell King (Oracle) size_t size, i; 45923571c7bSRussell King (Oracle) 46073472c83SRussell King (Oracle) /* Trailing characters should be filled with space chars, but 46173472c83SRussell King (Oracle) * some manufacturers can't read SFF-8472 and use NUL. 46273472c83SRussell King (Oracle) */ 46323571c7bSRussell King (Oracle) for (i = 0, size = 0; i < maxlen; i++) 46473472c83SRussell King (Oracle) if (str[i] != ' ' && str[i] != '\0') 46523571c7bSRussell King (Oracle) size = i + 1; 46623571c7bSRussell King (Oracle) 46723571c7bSRussell King (Oracle) return size; 46823571c7bSRussell King (Oracle) } 46923571c7bSRussell King (Oracle) 47023571c7bSRussell King (Oracle) static bool sfp_match(const char *qs, const char *str, size_t len) 47123571c7bSRussell King (Oracle) { 47223571c7bSRussell King (Oracle) if (!qs) 47323571c7bSRussell King (Oracle) return true; 47423571c7bSRussell King (Oracle) if (strlen(qs) != len) 47523571c7bSRussell King (Oracle) return false; 47623571c7bSRussell King (Oracle) return !strncmp(qs, str, len); 47723571c7bSRussell King (Oracle) } 47823571c7bSRussell King (Oracle) 47923571c7bSRussell King (Oracle) static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) 48023571c7bSRussell King (Oracle) { 48123571c7bSRussell King (Oracle) const struct sfp_quirk *q; 48223571c7bSRussell King (Oracle) unsigned int i; 48323571c7bSRussell King (Oracle) size_t vs, ps; 48423571c7bSRussell King (Oracle) 48523571c7bSRussell King (Oracle) vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); 48623571c7bSRussell King (Oracle) ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); 48723571c7bSRussell King (Oracle) 48823571c7bSRussell King (Oracle) for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) 48923571c7bSRussell King (Oracle) if (sfp_match(q->vendor, id->base.vendor_name, vs) && 49023571c7bSRussell King (Oracle) sfp_match(q->part, id->base.vendor_pn, ps)) 49123571c7bSRussell King (Oracle) return q; 49223571c7bSRussell King (Oracle) 49323571c7bSRussell King (Oracle) return NULL; 49423571c7bSRussell King (Oracle) } 49523571c7bSRussell King (Oracle) 49673970055SRussell King static unsigned long poll_jiffies; 49773970055SRussell King 49873970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 49973970055SRussell King { 50073970055SRussell King unsigned int i, state, v; 50173970055SRussell King 50273970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 50373970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 50473970055SRussell King continue; 50573970055SRussell King 50673970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 50773970055SRussell King if (v) 50873970055SRussell King state |= BIT(i); 50973970055SRussell King } 51073970055SRussell King 51173970055SRussell King return state; 51273970055SRussell King } 51373970055SRussell King 514259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 515259c8618SRussell King { 516259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 517259c8618SRussell King } 518259c8618SRussell King 51973970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 52073970055SRussell King { 521*fc082b39SRussell King (Oracle) unsigned int drive; 522*fc082b39SRussell King (Oracle) 523*fc082b39SRussell King (Oracle) if (state & SFP_F_PRESENT) 524*fc082b39SRussell King (Oracle) /* If the module is present, drive the requested signals */ 525*fc082b39SRussell King (Oracle) drive = sfp->state_hw_drive; 526*fc082b39SRussell King (Oracle) else 527*fc082b39SRussell King (Oracle) /* Otherwise, let them float to the pull-ups */ 528*fc082b39SRussell King (Oracle) drive = 0; 529*fc082b39SRussell King (Oracle) 530*fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) { 531*fc082b39SRussell King (Oracle) if (drive & SFP_F_TX_DISABLE) 53273970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 53373970055SRussell King state & SFP_F_TX_DISABLE); 534*fc082b39SRussell King (Oracle) else 53573970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 536*fc082b39SRussell King (Oracle) } 537*fc082b39SRussell King (Oracle) 538*fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0]) { 539*fc082b39SRussell King (Oracle) if (drive & SFP_F_RS0) 540*fc082b39SRussell King (Oracle) gpiod_direction_output(sfp->gpio[GPIO_RS0], 541*fc082b39SRussell King (Oracle) state & SFP_F_RS0); 542*fc082b39SRussell King (Oracle) else 543*fc082b39SRussell King (Oracle) gpiod_direction_input(sfp->gpio[GPIO_RS0]); 544*fc082b39SRussell King (Oracle) } 545*fc082b39SRussell King (Oracle) 546*fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS1]) { 547*fc082b39SRussell King (Oracle) if (drive & SFP_F_RS1) 548*fc082b39SRussell King (Oracle) gpiod_direction_output(sfp->gpio[GPIO_RS1], 549*fc082b39SRussell King (Oracle) state & SFP_F_RS1); 550*fc082b39SRussell King (Oracle) else 551*fc082b39SRussell King (Oracle) gpiod_direction_input(sfp->gpio[GPIO_RS1]); 55273970055SRussell King } 55373970055SRussell King } 55473970055SRussell King 5553bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 5563bb35261SJon Nettleton size_t len) 55773970055SRussell King { 55873970055SRussell King struct i2c_msg msgs[2]; 559426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 560426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 56128e74a7cSRussell King size_t this_len; 56273970055SRussell King int ret; 56373970055SRussell King 56473970055SRussell King msgs[0].addr = bus_addr; 56573970055SRussell King msgs[0].flags = 0; 56673970055SRussell King msgs[0].len = 1; 56773970055SRussell King msgs[0].buf = &dev_addr; 56873970055SRussell King msgs[1].addr = bus_addr; 56973970055SRussell King msgs[1].flags = I2C_M_RD; 57073970055SRussell King msgs[1].len = len; 57173970055SRussell King msgs[1].buf = buf; 57273970055SRussell King 57328e74a7cSRussell King while (len) { 57428e74a7cSRussell King this_len = len; 5750d035bedSRussell King if (this_len > block_size) 5760d035bedSRussell King this_len = block_size; 57728e74a7cSRussell King 57828e74a7cSRussell King msgs[1].len = this_len; 57928e74a7cSRussell King 5803bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 58173970055SRussell King if (ret < 0) 58273970055SRussell King return ret; 58373970055SRussell King 58428e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 58528e74a7cSRussell King break; 58628e74a7cSRussell King 58728e74a7cSRussell King msgs[1].buf += this_len; 58828e74a7cSRussell King dev_addr += this_len; 58928e74a7cSRussell King len -= this_len; 59028e74a7cSRussell King } 59128e74a7cSRussell King 59228e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 59373970055SRussell King } 59473970055SRussell King 5953bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 59673970055SRussell King size_t len) 59773970055SRussell King { 5983bb35261SJon Nettleton struct i2c_msg msgs[1]; 5993bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 6003bb35261SJon Nettleton int ret; 6013bb35261SJon Nettleton 6023bb35261SJon Nettleton msgs[0].addr = bus_addr; 6033bb35261SJon Nettleton msgs[0].flags = 0; 6043bb35261SJon Nettleton msgs[0].len = 1 + len; 6053bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 6063bb35261SJon Nettleton if (!msgs[0].buf) 6073bb35261SJon Nettleton return -ENOMEM; 6083bb35261SJon Nettleton 6093bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 6103bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 6113bb35261SJon Nettleton 6123bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 6133bb35261SJon Nettleton 6143bb35261SJon Nettleton kfree(msgs[0].buf); 6153bb35261SJon Nettleton 6163bb35261SJon Nettleton if (ret < 0) 6173bb35261SJon Nettleton return ret; 6183bb35261SJon Nettleton 6193bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 62073970055SRussell King } 62173970055SRussell King 62273970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 62373970055SRussell King { 62473970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 62573970055SRussell King return -EINVAL; 62673970055SRussell King 62773970055SRussell King sfp->i2c = i2c; 62873970055SRussell King sfp->read = sfp_i2c_read; 6293bb35261SJon Nettleton sfp->write = sfp_i2c_write; 63073970055SRussell King 631e85b1347SMarek Behún return 0; 632e85b1347SMarek Behún } 633e85b1347SMarek Behún 634e85b1347SMarek Behún static int sfp_i2c_mdiobus_create(struct sfp *sfp) 635e85b1347SMarek Behún { 636e85b1347SMarek Behún struct mii_bus *i2c_mii; 637e85b1347SMarek Behún int ret; 638e85b1347SMarek Behún 63909bbedacSMarek Behún i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, sfp->mdio_protocol); 64073970055SRussell King if (IS_ERR(i2c_mii)) 64173970055SRussell King return PTR_ERR(i2c_mii); 64273970055SRussell King 64373970055SRussell King i2c_mii->name = "SFP I2C Bus"; 64473970055SRussell King i2c_mii->phy_mask = ~0; 64573970055SRussell King 64673970055SRussell King ret = mdiobus_register(i2c_mii); 64773970055SRussell King if (ret < 0) { 64873970055SRussell King mdiobus_free(i2c_mii); 64973970055SRussell King return ret; 65073970055SRussell King } 65173970055SRussell King 65273970055SRussell King sfp->i2c_mii = i2c_mii; 65373970055SRussell King 65473970055SRussell King return 0; 65573970055SRussell King } 65673970055SRussell King 657e85b1347SMarek Behún static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) 658e85b1347SMarek Behún { 659e85b1347SMarek Behún mdiobus_unregister(sfp->i2c_mii); 660e85b1347SMarek Behún sfp->i2c_mii = NULL; 661e85b1347SMarek Behún } 662e85b1347SMarek Behún 66373970055SRussell King /* Interface */ 66473970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 66573970055SRussell King { 66673970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 66773970055SRussell King } 66873970055SRussell King 6693bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 6703bb35261SJon Nettleton { 6713bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 6723bb35261SJon Nettleton } 6733bb35261SJon Nettleton 674a3c536fcSRussell King (Oracle) static int sfp_modify_u8(struct sfp *sfp, bool a2, u8 addr, u8 mask, u8 val) 675a3c536fcSRussell King (Oracle) { 676a3c536fcSRussell King (Oracle) int ret; 677a3c536fcSRussell King (Oracle) u8 old, v; 678a3c536fcSRussell King (Oracle) 679a3c536fcSRussell King (Oracle) ret = sfp_read(sfp, a2, addr, &old, sizeof(old)); 680a3c536fcSRussell King (Oracle) if (ret != sizeof(old)) 681a3c536fcSRussell King (Oracle) return ret; 682a3c536fcSRussell King (Oracle) 683a3c536fcSRussell King (Oracle) v = (old & ~mask) | (val & mask); 684a3c536fcSRussell King (Oracle) if (v == old) 685a3c536fcSRussell King (Oracle) return sizeof(v); 686a3c536fcSRussell King (Oracle) 687a3c536fcSRussell King (Oracle) return sfp_write(sfp, a2, addr, &v, sizeof(v)); 688a3c536fcSRussell King (Oracle) } 689a3c536fcSRussell King (Oracle) 690f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 691f3c9a666SRussell King { 692f3c9a666SRussell King unsigned int state = 0; 693f3c9a666SRussell King u8 status; 6940dea4d03SRussell King int ret; 695f3c9a666SRussell King 6960dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 6970dea4d03SRussell King if (ret == sizeof(status)) { 698f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 699f3c9a666SRussell King state |= SFP_F_LOS; 700f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 701f3c9a666SRussell King state |= SFP_F_TX_FAULT; 7020dea4d03SRussell King } else { 7030dea4d03SRussell King dev_err_ratelimited(sfp->dev, 7049ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 7059ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 7060dea4d03SRussell King /* Preserve the current state */ 7070dea4d03SRussell King state = sfp->state; 708f3c9a666SRussell King } 709f3c9a666SRussell King 710f3c9a666SRussell King return state & sfp->state_soft_mask; 711f3c9a666SRussell King } 712f3c9a666SRussell King 713*fc082b39SRussell King (Oracle) static void sfp_soft_set_state(struct sfp *sfp, unsigned int state, 714*fc082b39SRussell King (Oracle) unsigned int soft) 715f3c9a666SRussell King { 716*fc082b39SRussell King (Oracle) u8 mask = 0; 717a3c536fcSRussell King (Oracle) u8 val = 0; 718f3c9a666SRussell King 719*fc082b39SRussell King (Oracle) if (soft & SFP_F_TX_DISABLE) 720*fc082b39SRussell King (Oracle) mask |= SFP_STATUS_TX_DISABLE_FORCE; 721f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 722a3c536fcSRussell King (Oracle) val |= SFP_STATUS_TX_DISABLE_FORCE; 723f3c9a666SRussell King 724*fc082b39SRussell King (Oracle) if (soft & SFP_F_RS0) 725*fc082b39SRussell King (Oracle) mask |= SFP_STATUS_RS0_SELECT; 726*fc082b39SRussell King (Oracle) if (state & SFP_F_RS0) 727*fc082b39SRussell King (Oracle) val |= SFP_STATUS_RS0_SELECT; 728a3c536fcSRussell King (Oracle) 729*fc082b39SRussell King (Oracle) if (mask) 730a3c536fcSRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); 731*fc082b39SRussell King (Oracle) 732*fc082b39SRussell King (Oracle) val = mask = 0; 733*fc082b39SRussell King (Oracle) if (soft & SFP_F_RS1) 734*fc082b39SRussell King (Oracle) mask |= SFP_EXT_STATUS_RS1_SELECT; 735*fc082b39SRussell King (Oracle) if (state & SFP_F_RS1) 736*fc082b39SRussell King (Oracle) val |= SFP_EXT_STATUS_RS1_SELECT; 737*fc082b39SRussell King (Oracle) 738*fc082b39SRussell King (Oracle) if (mask) 739*fc082b39SRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_EXT_STATUS, mask, val); 740f3c9a666SRussell King } 741f3c9a666SRussell King 742f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 743f3c9a666SRussell King { 744f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 7458475c4b7SRussell King (Oracle) unsigned int mask = 0; 746f3c9a666SRussell King 7478475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 7488475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 7498475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 7508475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 7518475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 7528475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 753*fc082b39SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RATE_SELECT) 754*fc082b39SRussell King (Oracle) mask |= sfp->rs_state_mask; 7558475c4b7SRussell King (Oracle) 7561974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 7578475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 7588475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 759f3c9a666SRussell King 760f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 761f3c9a666SRussell King !sfp->need_poll) 762f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 7631974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 764f3c9a666SRussell King } 765f3c9a666SRussell King 766f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 767f3c9a666SRussell King { 7681974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 769f3c9a666SRussell King sfp->state_soft_mask = 0; 7701974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 771f3c9a666SRussell King } 772f3c9a666SRussell King 7731974fd3bSRussell King (Oracle) /* sfp_get_state() - must be called with st_mutex held, or in the 7741974fd3bSRussell King (Oracle) * initialisation path. 7751974fd3bSRussell King (Oracle) */ 776f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 777f3c9a666SRussell King { 7788475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 7798475c4b7SRussell King (Oracle) unsigned int state; 780f3c9a666SRussell King 7818475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 7828475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 783f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 784f3c9a666SRussell King 785f3c9a666SRussell King return state; 786f3c9a666SRussell King } 787f3c9a666SRussell King 7881974fd3bSRussell King (Oracle) /* sfp_set_state() - must be called with st_mutex held, or in the 7891974fd3bSRussell King (Oracle) * initialisation path. 7901974fd3bSRussell King (Oracle) */ 791f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 792f3c9a666SRussell King { 793*fc082b39SRussell King (Oracle) unsigned int soft; 794*fc082b39SRussell King (Oracle) 795f3c9a666SRussell King sfp->set_state(sfp, state); 796f3c9a666SRussell King 797*fc082b39SRussell King (Oracle) soft = sfp->state_soft_mask & SFP_F_OUTPUTS; 798*fc082b39SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 799*fc082b39SRussell King (Oracle) sfp_soft_set_state(sfp, state, soft); 800f3c9a666SRussell King } 801f3c9a666SRussell King 802418c1214SRussell King (Oracle) static void sfp_mod_state(struct sfp *sfp, unsigned int mask, unsigned int set) 803418c1214SRussell King (Oracle) { 8041974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 805418c1214SRussell King (Oracle) sfp->state = (sfp->state & ~mask) | set; 806418c1214SRussell King (Oracle) sfp_set_state(sfp, sfp->state); 8071974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 808418c1214SRussell King (Oracle) } 809418c1214SRussell King (Oracle) 81073970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 81173970055SRussell King { 81273970055SRussell King u8 *p, check; 81373970055SRussell King 81473970055SRussell King for (p = buf, check = 0; len; p++, len--) 81573970055SRussell King check += *p; 81673970055SRussell King 81773970055SRussell King return check; 81873970055SRussell King } 81973970055SRussell King 8201323061aSAndrew Lunn /* hwmon */ 8211323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 8221323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 8231323061aSAndrew Lunn enum hwmon_sensor_types type, 8241323061aSAndrew Lunn u32 attr, int channel) 8251323061aSAndrew Lunn { 8261323061aSAndrew Lunn const struct sfp *sfp = data; 8271323061aSAndrew Lunn 8281323061aSAndrew Lunn switch (type) { 8291323061aSAndrew Lunn case hwmon_temp: 8301323061aSAndrew Lunn switch (attr) { 8311323061aSAndrew Lunn case hwmon_temp_min_alarm: 8321323061aSAndrew Lunn case hwmon_temp_max_alarm: 8331323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 8341323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8351323061aSAndrew Lunn case hwmon_temp_min: 8361323061aSAndrew Lunn case hwmon_temp_max: 8371323061aSAndrew Lunn case hwmon_temp_lcrit: 8381323061aSAndrew Lunn case hwmon_temp_crit: 839a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 840a33710bdSAndrew Lunn return 0; 841df561f66SGustavo A. R. Silva fallthrough; 842a33710bdSAndrew Lunn case hwmon_temp_input: 843c1236979SAndrew Lunn case hwmon_temp_label: 8441323061aSAndrew Lunn return 0444; 8451323061aSAndrew Lunn default: 8461323061aSAndrew Lunn return 0; 8471323061aSAndrew Lunn } 8481323061aSAndrew Lunn case hwmon_in: 8491323061aSAndrew Lunn switch (attr) { 8501323061aSAndrew Lunn case hwmon_in_min_alarm: 8511323061aSAndrew Lunn case hwmon_in_max_alarm: 8521323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8531323061aSAndrew Lunn case hwmon_in_crit_alarm: 8541323061aSAndrew Lunn case hwmon_in_min: 8551323061aSAndrew Lunn case hwmon_in_max: 8561323061aSAndrew Lunn case hwmon_in_lcrit: 8571323061aSAndrew Lunn case hwmon_in_crit: 858a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 859a33710bdSAndrew Lunn return 0; 860df561f66SGustavo A. R. Silva fallthrough; 861a33710bdSAndrew Lunn case hwmon_in_input: 862c1236979SAndrew Lunn case hwmon_in_label: 8631323061aSAndrew Lunn return 0444; 8641323061aSAndrew Lunn default: 8651323061aSAndrew Lunn return 0; 8661323061aSAndrew Lunn } 8671323061aSAndrew Lunn case hwmon_curr: 8681323061aSAndrew Lunn switch (attr) { 8691323061aSAndrew Lunn case hwmon_curr_min_alarm: 8701323061aSAndrew Lunn case hwmon_curr_max_alarm: 8711323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 8721323061aSAndrew Lunn case hwmon_curr_crit_alarm: 8731323061aSAndrew Lunn case hwmon_curr_min: 8741323061aSAndrew Lunn case hwmon_curr_max: 8751323061aSAndrew Lunn case hwmon_curr_lcrit: 8761323061aSAndrew Lunn case hwmon_curr_crit: 877a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 878a33710bdSAndrew Lunn return 0; 879df561f66SGustavo A. R. Silva fallthrough; 880a33710bdSAndrew Lunn case hwmon_curr_input: 881c1236979SAndrew Lunn case hwmon_curr_label: 8821323061aSAndrew Lunn return 0444; 8831323061aSAndrew Lunn default: 8841323061aSAndrew Lunn return 0; 8851323061aSAndrew Lunn } 8861323061aSAndrew Lunn case hwmon_power: 8871323061aSAndrew Lunn /* External calibration of receive power requires 8881323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 8891323061aSAndrew Lunn * is not easy, so just skip it. If the module does 8901323061aSAndrew Lunn * not require external calibration, we can however 8911323061aSAndrew Lunn * show receiver power, since FP is then not needed. 8921323061aSAndrew Lunn */ 8931323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 8941323061aSAndrew Lunn channel == 1) 8951323061aSAndrew Lunn return 0; 8961323061aSAndrew Lunn switch (attr) { 8971323061aSAndrew Lunn case hwmon_power_min_alarm: 8981323061aSAndrew Lunn case hwmon_power_max_alarm: 8991323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9001323061aSAndrew Lunn case hwmon_power_crit_alarm: 9011323061aSAndrew Lunn case hwmon_power_min: 9021323061aSAndrew Lunn case hwmon_power_max: 9031323061aSAndrew Lunn case hwmon_power_lcrit: 9041323061aSAndrew Lunn case hwmon_power_crit: 905a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 906a33710bdSAndrew Lunn return 0; 907df561f66SGustavo A. R. Silva fallthrough; 908a33710bdSAndrew Lunn case hwmon_power_input: 909c1236979SAndrew Lunn case hwmon_power_label: 9101323061aSAndrew Lunn return 0444; 9111323061aSAndrew Lunn default: 9121323061aSAndrew Lunn return 0; 9131323061aSAndrew Lunn } 9141323061aSAndrew Lunn default: 9151323061aSAndrew Lunn return 0; 9161323061aSAndrew Lunn } 9171323061aSAndrew Lunn } 9181323061aSAndrew Lunn 9191323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 9201323061aSAndrew Lunn { 9211323061aSAndrew Lunn __be16 val; 9221323061aSAndrew Lunn int err; 9231323061aSAndrew Lunn 9241323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 9251323061aSAndrew Lunn if (err < 0) 9261323061aSAndrew Lunn return err; 9271323061aSAndrew Lunn 9281323061aSAndrew Lunn *value = be16_to_cpu(val); 9291323061aSAndrew Lunn 9301323061aSAndrew Lunn return 0; 9311323061aSAndrew Lunn } 9321323061aSAndrew Lunn 9331323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 9341323061aSAndrew Lunn { 9350cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9361323061aSAndrew Lunn } 9371323061aSAndrew Lunn 9381323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 9391323061aSAndrew Lunn long *value) 9401323061aSAndrew Lunn { 9411323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 9421323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 9431323061aSAndrew Lunn } 9441323061aSAndrew Lunn 9451323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 9461323061aSAndrew Lunn { 9471323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 9481323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 9491323061aSAndrew Lunn 9501323061aSAndrew Lunn if (*value >= 0x8000) 9511323061aSAndrew Lunn *value -= 0x10000; 9521323061aSAndrew Lunn 9531323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 9541323061aSAndrew Lunn } 9551323061aSAndrew Lunn 9561323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 9571323061aSAndrew Lunn { 9581323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 9591323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 9601323061aSAndrew Lunn 9611323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9621323061aSAndrew Lunn } 9631323061aSAndrew Lunn 9641323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 9651323061aSAndrew Lunn { 9661323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 9671323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 9681323061aSAndrew Lunn 9691323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 9701323061aSAndrew Lunn } 9711323061aSAndrew Lunn 9721323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 9731323061aSAndrew Lunn { 9741323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 9751323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 9761323061aSAndrew Lunn 9771323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9781323061aSAndrew Lunn } 9791323061aSAndrew Lunn 9801323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 9811323061aSAndrew Lunn { 9821323061aSAndrew Lunn int err; 9831323061aSAndrew Lunn 9841323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9851323061aSAndrew Lunn if (err < 0) 9861323061aSAndrew Lunn return err; 9871323061aSAndrew Lunn 9881323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9891323061aSAndrew Lunn 9901323061aSAndrew Lunn return 0; 9911323061aSAndrew Lunn } 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 9941323061aSAndrew Lunn { 9951323061aSAndrew Lunn int err; 9961323061aSAndrew Lunn 9971323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9981323061aSAndrew Lunn if (err < 0) 9991323061aSAndrew Lunn return err; 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10021323061aSAndrew Lunn 10031323061aSAndrew Lunn return 0; 10041323061aSAndrew Lunn } 10051323061aSAndrew Lunn 10061323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 10071323061aSAndrew Lunn { 10081323061aSAndrew Lunn int err; 10091323061aSAndrew Lunn 10101323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10111323061aSAndrew Lunn if (err < 0) 10121323061aSAndrew Lunn return err; 10131323061aSAndrew Lunn 10141323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10151323061aSAndrew Lunn 10161323061aSAndrew Lunn return 0; 10171323061aSAndrew Lunn } 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 10201323061aSAndrew Lunn { 10211323061aSAndrew Lunn int err; 10221323061aSAndrew Lunn 10231323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10241323061aSAndrew Lunn if (err < 0) 10251323061aSAndrew Lunn return err; 10261323061aSAndrew Lunn 10271323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10281323061aSAndrew Lunn 10291323061aSAndrew Lunn return 0; 10301323061aSAndrew Lunn } 10311323061aSAndrew Lunn 10321323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 10331323061aSAndrew Lunn { 10341323061aSAndrew Lunn int err; 10351323061aSAndrew Lunn 10361323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10371323061aSAndrew Lunn if (err < 0) 10381323061aSAndrew Lunn return err; 10391323061aSAndrew Lunn 10401323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10411323061aSAndrew Lunn 10421323061aSAndrew Lunn return 0; 10431323061aSAndrew Lunn } 10441323061aSAndrew Lunn 10451323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 10461323061aSAndrew Lunn { 10471323061aSAndrew Lunn u8 status; 10481323061aSAndrew Lunn int err; 10491323061aSAndrew Lunn 10501323061aSAndrew Lunn switch (attr) { 10511323061aSAndrew Lunn case hwmon_temp_input: 10521323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 10531323061aSAndrew Lunn 10541323061aSAndrew Lunn case hwmon_temp_lcrit: 10551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 10561323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10571323061aSAndrew Lunn return 0; 10581323061aSAndrew Lunn 10591323061aSAndrew Lunn case hwmon_temp_min: 10601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 10611323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10621323061aSAndrew Lunn return 0; 10631323061aSAndrew Lunn case hwmon_temp_max: 10641323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 10651323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10661323061aSAndrew Lunn return 0; 10671323061aSAndrew Lunn 10681323061aSAndrew Lunn case hwmon_temp_crit: 10691323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 10701323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10711323061aSAndrew Lunn return 0; 10721323061aSAndrew Lunn 10731323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 10741323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10751323061aSAndrew Lunn if (err < 0) 10761323061aSAndrew Lunn return err; 10771323061aSAndrew Lunn 10781323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 10791323061aSAndrew Lunn return 0; 10801323061aSAndrew Lunn 10811323061aSAndrew Lunn case hwmon_temp_min_alarm: 10821323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10831323061aSAndrew Lunn if (err < 0) 10841323061aSAndrew Lunn return err; 10851323061aSAndrew Lunn 10861323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 10871323061aSAndrew Lunn return 0; 10881323061aSAndrew Lunn 10891323061aSAndrew Lunn case hwmon_temp_max_alarm: 10901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10911323061aSAndrew Lunn if (err < 0) 10921323061aSAndrew Lunn return err; 10931323061aSAndrew Lunn 10941323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 10951323061aSAndrew Lunn return 0; 10961323061aSAndrew Lunn 10971323061aSAndrew Lunn case hwmon_temp_crit_alarm: 10981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10991323061aSAndrew Lunn if (err < 0) 11001323061aSAndrew Lunn return err; 11011323061aSAndrew Lunn 11021323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 11031323061aSAndrew Lunn return 0; 11041323061aSAndrew Lunn default: 11051323061aSAndrew Lunn return -EOPNOTSUPP; 11061323061aSAndrew Lunn } 11071323061aSAndrew Lunn 11081323061aSAndrew Lunn return -EOPNOTSUPP; 11091323061aSAndrew Lunn } 11101323061aSAndrew Lunn 11111323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 11121323061aSAndrew Lunn { 11131323061aSAndrew Lunn u8 status; 11141323061aSAndrew Lunn int err; 11151323061aSAndrew Lunn 11161323061aSAndrew Lunn switch (attr) { 11171323061aSAndrew Lunn case hwmon_in_input: 11181323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 11191323061aSAndrew Lunn 11201323061aSAndrew Lunn case hwmon_in_lcrit: 11211323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 11221323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11231323061aSAndrew Lunn return 0; 11241323061aSAndrew Lunn 11251323061aSAndrew Lunn case hwmon_in_min: 11261323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 11271323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11281323061aSAndrew Lunn return 0; 11291323061aSAndrew Lunn 11301323061aSAndrew Lunn case hwmon_in_max: 11311323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 11321323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11331323061aSAndrew Lunn return 0; 11341323061aSAndrew Lunn 11351323061aSAndrew Lunn case hwmon_in_crit: 11361323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 11371323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11381323061aSAndrew Lunn return 0; 11391323061aSAndrew Lunn 11401323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 11411323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11421323061aSAndrew Lunn if (err < 0) 11431323061aSAndrew Lunn return err; 11441323061aSAndrew Lunn 11451323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 11461323061aSAndrew Lunn return 0; 11471323061aSAndrew Lunn 11481323061aSAndrew Lunn case hwmon_in_min_alarm: 11491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11501323061aSAndrew Lunn if (err < 0) 11511323061aSAndrew Lunn return err; 11521323061aSAndrew Lunn 11531323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 11541323061aSAndrew Lunn return 0; 11551323061aSAndrew Lunn 11561323061aSAndrew Lunn case hwmon_in_max_alarm: 11571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11581323061aSAndrew Lunn if (err < 0) 11591323061aSAndrew Lunn return err; 11601323061aSAndrew Lunn 11611323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 11621323061aSAndrew Lunn return 0; 11631323061aSAndrew Lunn 11641323061aSAndrew Lunn case hwmon_in_crit_alarm: 11651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11661323061aSAndrew Lunn if (err < 0) 11671323061aSAndrew Lunn return err; 11681323061aSAndrew Lunn 11691323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 11701323061aSAndrew Lunn return 0; 11711323061aSAndrew Lunn default: 11721323061aSAndrew Lunn return -EOPNOTSUPP; 11731323061aSAndrew Lunn } 11741323061aSAndrew Lunn 11751323061aSAndrew Lunn return -EOPNOTSUPP; 11761323061aSAndrew Lunn } 11771323061aSAndrew Lunn 11781323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 11791323061aSAndrew Lunn { 11801323061aSAndrew Lunn u8 status; 11811323061aSAndrew Lunn int err; 11821323061aSAndrew Lunn 11831323061aSAndrew Lunn switch (attr) { 11841323061aSAndrew Lunn case hwmon_curr_input: 11851323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 11861323061aSAndrew Lunn 11871323061aSAndrew Lunn case hwmon_curr_lcrit: 11881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 11891323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11901323061aSAndrew Lunn return 0; 11911323061aSAndrew Lunn 11921323061aSAndrew Lunn case hwmon_curr_min: 11931323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 11941323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11951323061aSAndrew Lunn return 0; 11961323061aSAndrew Lunn 11971323061aSAndrew Lunn case hwmon_curr_max: 11981323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 11991323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12001323061aSAndrew Lunn return 0; 12011323061aSAndrew Lunn 12021323061aSAndrew Lunn case hwmon_curr_crit: 12031323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 12041323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12051323061aSAndrew Lunn return 0; 12061323061aSAndrew Lunn 12071323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 12081323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12091323061aSAndrew Lunn if (err < 0) 12101323061aSAndrew Lunn return err; 12111323061aSAndrew Lunn 12121323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 12131323061aSAndrew Lunn return 0; 12141323061aSAndrew Lunn 12151323061aSAndrew Lunn case hwmon_curr_min_alarm: 12161323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12171323061aSAndrew Lunn if (err < 0) 12181323061aSAndrew Lunn return err; 12191323061aSAndrew Lunn 12201323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 12211323061aSAndrew Lunn return 0; 12221323061aSAndrew Lunn 12231323061aSAndrew Lunn case hwmon_curr_max_alarm: 12241323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12251323061aSAndrew Lunn if (err < 0) 12261323061aSAndrew Lunn return err; 12271323061aSAndrew Lunn 12281323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 12291323061aSAndrew Lunn return 0; 12301323061aSAndrew Lunn 12311323061aSAndrew Lunn case hwmon_curr_crit_alarm: 12321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12331323061aSAndrew Lunn if (err < 0) 12341323061aSAndrew Lunn return err; 12351323061aSAndrew Lunn 12361323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 12371323061aSAndrew Lunn return 0; 12381323061aSAndrew Lunn default: 12391323061aSAndrew Lunn return -EOPNOTSUPP; 12401323061aSAndrew Lunn } 12411323061aSAndrew Lunn 12421323061aSAndrew Lunn return -EOPNOTSUPP; 12431323061aSAndrew Lunn } 12441323061aSAndrew Lunn 12451323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 12461323061aSAndrew Lunn { 12471323061aSAndrew Lunn u8 status; 12481323061aSAndrew Lunn int err; 12491323061aSAndrew Lunn 12501323061aSAndrew Lunn switch (attr) { 12511323061aSAndrew Lunn case hwmon_power_input: 12521323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 12531323061aSAndrew Lunn 12541323061aSAndrew Lunn case hwmon_power_lcrit: 12551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 12561323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12571323061aSAndrew Lunn return 0; 12581323061aSAndrew Lunn 12591323061aSAndrew Lunn case hwmon_power_min: 12601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 12611323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12621323061aSAndrew Lunn return 0; 12631323061aSAndrew Lunn 12641323061aSAndrew Lunn case hwmon_power_max: 12651323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 12661323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12671323061aSAndrew Lunn return 0; 12681323061aSAndrew Lunn 12691323061aSAndrew Lunn case hwmon_power_crit: 12701323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 12711323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12721323061aSAndrew Lunn return 0; 12731323061aSAndrew Lunn 12741323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12761323061aSAndrew Lunn if (err < 0) 12771323061aSAndrew Lunn return err; 12781323061aSAndrew Lunn 12791323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 12801323061aSAndrew Lunn return 0; 12811323061aSAndrew Lunn 12821323061aSAndrew Lunn case hwmon_power_min_alarm: 12831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12841323061aSAndrew Lunn if (err < 0) 12851323061aSAndrew Lunn return err; 12861323061aSAndrew Lunn 12871323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 12881323061aSAndrew Lunn return 0; 12891323061aSAndrew Lunn 12901323061aSAndrew Lunn case hwmon_power_max_alarm: 12911323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12921323061aSAndrew Lunn if (err < 0) 12931323061aSAndrew Lunn return err; 12941323061aSAndrew Lunn 12951323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 12961323061aSAndrew Lunn return 0; 12971323061aSAndrew Lunn 12981323061aSAndrew Lunn case hwmon_power_crit_alarm: 12991323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 13001323061aSAndrew Lunn if (err < 0) 13011323061aSAndrew Lunn return err; 13021323061aSAndrew Lunn 13031323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 13041323061aSAndrew Lunn return 0; 13051323061aSAndrew Lunn default: 13061323061aSAndrew Lunn return -EOPNOTSUPP; 13071323061aSAndrew Lunn } 13081323061aSAndrew Lunn 13091323061aSAndrew Lunn return -EOPNOTSUPP; 13101323061aSAndrew Lunn } 13111323061aSAndrew Lunn 13121323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 13131323061aSAndrew Lunn { 13141323061aSAndrew Lunn u8 status; 13151323061aSAndrew Lunn int err; 13161323061aSAndrew Lunn 13171323061aSAndrew Lunn switch (attr) { 13181323061aSAndrew Lunn case hwmon_power_input: 13191323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 13201323061aSAndrew Lunn 13211323061aSAndrew Lunn case hwmon_power_lcrit: 13221323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 13231323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13241323061aSAndrew Lunn return 0; 13251323061aSAndrew Lunn 13261323061aSAndrew Lunn case hwmon_power_min: 13271323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 13281323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13291323061aSAndrew Lunn return 0; 13301323061aSAndrew Lunn 13311323061aSAndrew Lunn case hwmon_power_max: 13321323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 13331323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13341323061aSAndrew Lunn return 0; 13351323061aSAndrew Lunn 13361323061aSAndrew Lunn case hwmon_power_crit: 13371323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 13381323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13391323061aSAndrew Lunn return 0; 13401323061aSAndrew Lunn 13411323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 13421323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 13431323061aSAndrew Lunn if (err < 0) 13441323061aSAndrew Lunn return err; 13451323061aSAndrew Lunn 13461323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 13471323061aSAndrew Lunn return 0; 13481323061aSAndrew Lunn 13491323061aSAndrew Lunn case hwmon_power_min_alarm: 13501323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 13511323061aSAndrew Lunn if (err < 0) 13521323061aSAndrew Lunn return err; 13531323061aSAndrew Lunn 13541323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 13551323061aSAndrew Lunn return 0; 13561323061aSAndrew Lunn 13571323061aSAndrew Lunn case hwmon_power_max_alarm: 13581323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 13591323061aSAndrew Lunn if (err < 0) 13601323061aSAndrew Lunn return err; 13611323061aSAndrew Lunn 13621323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 13631323061aSAndrew Lunn return 0; 13641323061aSAndrew Lunn 13651323061aSAndrew Lunn case hwmon_power_crit_alarm: 13661323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 13671323061aSAndrew Lunn if (err < 0) 13681323061aSAndrew Lunn return err; 13691323061aSAndrew Lunn 13701323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 13711323061aSAndrew Lunn return 0; 13721323061aSAndrew Lunn default: 13731323061aSAndrew Lunn return -EOPNOTSUPP; 13741323061aSAndrew Lunn } 13751323061aSAndrew Lunn 13761323061aSAndrew Lunn return -EOPNOTSUPP; 13771323061aSAndrew Lunn } 13781323061aSAndrew Lunn 13791323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 13801323061aSAndrew Lunn u32 attr, int channel, long *value) 13811323061aSAndrew Lunn { 13821323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 13831323061aSAndrew Lunn 13841323061aSAndrew Lunn switch (type) { 13851323061aSAndrew Lunn case hwmon_temp: 13861323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 13871323061aSAndrew Lunn case hwmon_in: 13881323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 13891323061aSAndrew Lunn case hwmon_curr: 13901323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 13911323061aSAndrew Lunn case hwmon_power: 13921323061aSAndrew Lunn switch (channel) { 13931323061aSAndrew Lunn case 0: 13941323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 13951323061aSAndrew Lunn case 1: 13961323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 13971323061aSAndrew Lunn default: 13981323061aSAndrew Lunn return -EOPNOTSUPP; 13991323061aSAndrew Lunn } 14001323061aSAndrew Lunn default: 14011323061aSAndrew Lunn return -EOPNOTSUPP; 14021323061aSAndrew Lunn } 14031323061aSAndrew Lunn } 14041323061aSAndrew Lunn 1405c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1406c1236979SAndrew Lunn "TX_power", 1407c1236979SAndrew Lunn "RX_power", 1408c1236979SAndrew Lunn }; 1409c1236979SAndrew Lunn 1410c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1411c1236979SAndrew Lunn enum hwmon_sensor_types type, 1412c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1413c1236979SAndrew Lunn { 1414c1236979SAndrew Lunn switch (type) { 1415c1236979SAndrew Lunn case hwmon_curr: 1416c1236979SAndrew Lunn switch (attr) { 1417c1236979SAndrew Lunn case hwmon_curr_label: 1418c1236979SAndrew Lunn *str = "bias"; 1419c1236979SAndrew Lunn return 0; 1420c1236979SAndrew Lunn default: 1421c1236979SAndrew Lunn return -EOPNOTSUPP; 1422c1236979SAndrew Lunn } 1423c1236979SAndrew Lunn break; 1424c1236979SAndrew Lunn case hwmon_temp: 1425c1236979SAndrew Lunn switch (attr) { 1426c1236979SAndrew Lunn case hwmon_temp_label: 1427c1236979SAndrew Lunn *str = "temperature"; 1428c1236979SAndrew Lunn return 0; 1429c1236979SAndrew Lunn default: 1430c1236979SAndrew Lunn return -EOPNOTSUPP; 1431c1236979SAndrew Lunn } 1432c1236979SAndrew Lunn break; 1433c1236979SAndrew Lunn case hwmon_in: 1434c1236979SAndrew Lunn switch (attr) { 1435c1236979SAndrew Lunn case hwmon_in_label: 1436c1236979SAndrew Lunn *str = "VCC"; 1437c1236979SAndrew Lunn return 0; 1438c1236979SAndrew Lunn default: 1439c1236979SAndrew Lunn return -EOPNOTSUPP; 1440c1236979SAndrew Lunn } 1441c1236979SAndrew Lunn break; 1442c1236979SAndrew Lunn case hwmon_power: 1443c1236979SAndrew Lunn switch (attr) { 1444c1236979SAndrew Lunn case hwmon_power_label: 1445c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1446c1236979SAndrew Lunn return 0; 1447c1236979SAndrew Lunn default: 1448c1236979SAndrew Lunn return -EOPNOTSUPP; 1449c1236979SAndrew Lunn } 1450c1236979SAndrew Lunn break; 1451c1236979SAndrew Lunn default: 1452c1236979SAndrew Lunn return -EOPNOTSUPP; 1453c1236979SAndrew Lunn } 1454c1236979SAndrew Lunn 1455c1236979SAndrew Lunn return -EOPNOTSUPP; 1456c1236979SAndrew Lunn } 1457c1236979SAndrew Lunn 14581323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 14591323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 14601323061aSAndrew Lunn .read = sfp_hwmon_read, 1461c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 14621323061aSAndrew Lunn }; 14631323061aSAndrew Lunn 1464490fde26SKrzysztof Kozlowski static const struct hwmon_channel_info * const sfp_hwmon_info[] = { 1465815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1466815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1467815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 14681323061aSAndrew Lunn HWMON_I_INPUT | 14691323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 14701323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 14711323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1472c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1473815f5f57SBeniamin Sandu HWMON_I_LABEL), 1474815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1475815f5f57SBeniamin Sandu HWMON_T_INPUT | 1476815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1477815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1478815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1479815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1480815f5f57SBeniamin Sandu HWMON_T_LABEL), 1481815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 14821323061aSAndrew Lunn HWMON_C_INPUT | 14831323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 14841323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 14851323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1486c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1487815f5f57SBeniamin Sandu HWMON_C_LABEL), 1488815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 14891323061aSAndrew Lunn /* Transmit power */ 14901323061aSAndrew Lunn HWMON_P_INPUT | 14911323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 14921323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 14931323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1494c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1495c1236979SAndrew Lunn HWMON_P_LABEL, 14961323061aSAndrew Lunn /* Receive power */ 14971323061aSAndrew Lunn HWMON_P_INPUT | 14981323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 14991323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 15001323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1501c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1502815f5f57SBeniamin Sandu HWMON_P_LABEL), 15031323061aSAndrew Lunn NULL, 15041323061aSAndrew Lunn }; 15051323061aSAndrew Lunn 15061323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 15071323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 15081323061aSAndrew Lunn .info = sfp_hwmon_info, 15091323061aSAndrew Lunn }; 15101323061aSAndrew Lunn 1511139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 15121323061aSAndrew Lunn { 1513139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 15143f118c44SMichael Walle int err; 15151323061aSAndrew Lunn 1516426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1517426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1518426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1519426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1520426c6cbcSPali Rohár * skip registration of hwmon device. 1521426c6cbcSPali Rohár */ 1522426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1523426c6cbcSPali Rohár dev_info(sfp->dev, 1524426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1525426c6cbcSPali Rohár dev_info(sfp->dev, 1526426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1527426c6cbcSPali Rohár return; 1528426c6cbcSPali Rohár } 1529426c6cbcSPali Rohár 1530139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1531139d3a21SRussell King if (err < 0) { 1532139d3a21SRussell King if (sfp->hwmon_tries--) { 1533139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1534139d3a21SRussell King T_PROBE_RETRY_SLOW); 1535139d3a21SRussell King } else { 15369ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 15379ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1538139d3a21SRussell King } 1539139d3a21SRussell King return; 1540139d3a21SRussell King } 1541139d3a21SRussell King 15423f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 15433f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1544139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1545139d3a21SRussell King return; 1546139d3a21SRussell King } 1547139d3a21SRussell King 1548139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1549139d3a21SRussell King sfp->hwmon_name, sfp, 1550139d3a21SRussell King &sfp_hwmon_chip_info, 1551139d3a21SRussell King NULL); 1552139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1553139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1554139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1555139d3a21SRussell King } 1556139d3a21SRussell King 1557139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1558139d3a21SRussell King { 1559f94b9bedSRussell King (Oracle) if (sfp->have_a2 && sfp->id.ext.diagmon & SFP_DIAGMON_DDM) { 1560139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1561139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 1562f94b9bedSRussell King (Oracle) } 15631323061aSAndrew Lunn 1564139d3a21SRussell King return 0; 15651323061aSAndrew Lunn } 15661323061aSAndrew Lunn 15671323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15681323061aSAndrew Lunn { 1569139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 15703e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 15711323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 15723e322474SAndrew Lunn sfp->hwmon_dev = NULL; 15731323061aSAndrew Lunn kfree(sfp->hwmon_name); 15741323061aSAndrew Lunn } 15753e322474SAndrew Lunn } 1576139d3a21SRussell King 1577139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1578139d3a21SRussell King { 1579139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1580139d3a21SRussell King 1581139d3a21SRussell King return 0; 1582139d3a21SRussell King } 1583139d3a21SRussell King 1584139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1585139d3a21SRussell King { 1586139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1587139d3a21SRussell King } 15881323061aSAndrew Lunn #else 15891323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 15901323061aSAndrew Lunn { 15911323061aSAndrew Lunn return 0; 15921323061aSAndrew Lunn } 15931323061aSAndrew Lunn 15941323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15951323061aSAndrew Lunn { 15961323061aSAndrew Lunn } 1597139d3a21SRussell King 1598139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1599139d3a21SRussell King { 1600139d3a21SRussell King return 0; 1601139d3a21SRussell King } 1602139d3a21SRussell King 1603139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1604139d3a21SRussell King { 1605139d3a21SRussell King } 16061323061aSAndrew Lunn #endif 16071323061aSAndrew Lunn 160873970055SRussell King /* Helpers */ 160973970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 161073970055SRussell King { 161173970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 161273970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 1613418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, SFP_F_TX_DISABLE); 161473970055SRussell King } 161573970055SRussell King 161673970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 161773970055SRussell King { 161873970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 161973970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 1620418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, 0); 162173970055SRussell King } 162273970055SRussell King 16239cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 16249cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 16259cc8976cSRussell King { 16269cc8976cSRussell King struct sfp *sfp = s->private; 16279cc8976cSRussell King 16289cc8976cSRussell King seq_printf(s, "Module state: %s\n", 16299cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 16309cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 16319cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 16329cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 16339cc8976cSRussell King seq_printf(s, "Device state: %s\n", 16349cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 16359cc8976cSRussell King seq_printf(s, "Main state: %s\n", 16369cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 16379cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 16389cc8976cSRussell King sfp->sm_fault_retries); 16399cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 16409cc8976cSRussell King sfp->sm_phy_retries); 1641*fc082b39SRussell King (Oracle) seq_printf(s, "Signalling rate: %u kBd\n", sfp->rate_kbd); 1642*fc082b39SRussell King (Oracle) seq_printf(s, "Rate select threshold: %u kBd\n", 1643*fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd); 16449cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 16459cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 16469cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 16479cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 1648*fc082b39SRussell King (Oracle) seq_printf(s, "rs0: %d\n", !!(sfp->state & SFP_F_RS0)); 1649*fc082b39SRussell King (Oracle) seq_printf(s, "rs1: %d\n", !!(sfp->state & SFP_F_RS1)); 16509cc8976cSRussell King return 0; 16519cc8976cSRussell King } 16529cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 16539cc8976cSRussell King 16549cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 16559cc8976cSRussell King { 16569cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 16579cc8976cSRussell King 16589cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 16599cc8976cSRussell King &sfp_debug_state_fops); 16609cc8976cSRussell King } 16619cc8976cSRussell King 16629cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 16639cc8976cSRussell King { 16649cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 16659cc8976cSRussell King } 16669cc8976cSRussell King #else 16679cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 16689cc8976cSRussell King { 16699cc8976cSRussell King } 16709cc8976cSRussell King 16719cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 16729cc8976cSRussell King { 16739cc8976cSRussell King } 16749cc8976cSRussell King #endif 16759cc8976cSRussell King 167673970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 167773970055SRussell King { 16781974fd3bSRussell King (Oracle) unsigned int state; 167973970055SRussell King 16801974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 16811974fd3bSRussell King (Oracle) state = sfp->state; 16821974fd3bSRussell King (Oracle) if (!(state & SFP_F_TX_DISABLE)) { 168373970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 168473970055SRussell King 168573970055SRussell King udelay(T_RESET_US); 168673970055SRussell King 168773970055SRussell King sfp_set_state(sfp, state); 168873970055SRussell King } 16891974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 16901974fd3bSRussell King (Oracle) } 169173970055SRussell King 169273970055SRussell King /* SFP state machine */ 169373970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 169473970055SRussell King { 169573970055SRussell King if (timeout) 169673970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 169773970055SRussell King timeout); 169873970055SRussell King else 169973970055SRussell King cancel_delayed_work(&sfp->timeout); 170073970055SRussell King } 170173970055SRussell King 170273970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 170373970055SRussell King unsigned int timeout) 170473970055SRussell King { 170573970055SRussell King sfp->sm_state = state; 170673970055SRussell King sfp_sm_set_timer(sfp, timeout); 170773970055SRussell King } 170873970055SRussell King 17090936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1710516b29edSFlorian Fainelli unsigned int timeout) 171173970055SRussell King { 171273970055SRussell King sfp->sm_mod_state = state; 171373970055SRussell King sfp_sm_set_timer(sfp, timeout); 171473970055SRussell King } 171573970055SRussell King 171673970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 171773970055SRussell King { 171873970055SRussell King sfp_remove_phy(sfp->sfp_bus); 171973970055SRussell King phy_device_remove(sfp->mod_phy); 172073970055SRussell King phy_device_free(sfp->mod_phy); 172173970055SRussell King sfp->mod_phy = NULL; 172273970055SRussell King } 172373970055SRussell King 1724324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 172573970055SRussell King { 172673970055SRussell King struct phy_device *phy; 172773970055SRussell King int err; 172873970055SRussell King 1729324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 17301cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 17311cb89a14SRussell King return PTR_ERR(phy); 173220b56ed9SRussell King if (IS_ERR(phy)) { 17339ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1734256e43cbSRussell King return PTR_ERR(phy); 173573970055SRussell King } 173673970055SRussell King 17379a484621SRussell King err = phy_device_register(phy); 17389a484621SRussell King if (err) { 17399a484621SRussell King phy_device_free(phy); 17409ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 17419ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1742256e43cbSRussell King return err; 17439a484621SRussell King } 17449a484621SRussell King 174573970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 174673970055SRussell King if (err) { 174773970055SRussell King phy_device_remove(phy); 174873970055SRussell King phy_device_free(phy); 17499ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1750256e43cbSRussell King return err; 175173970055SRussell King } 175273970055SRussell King 175373970055SRussell King sfp->mod_phy = phy; 1754256e43cbSRussell King 1755256e43cbSRussell King return 0; 175673970055SRussell King } 175773970055SRussell King 175873970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 175973970055SRussell King { 176073970055SRussell King sfp_link_up(sfp->sfp_bus); 176173970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 176273970055SRussell King } 176373970055SRussell King 176473970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 176573970055SRussell King { 176673970055SRussell King sfp_link_down(sfp->sfp_bus); 176773970055SRussell King } 176873970055SRussell King 176973970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 177073970055SRussell King { 1771624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1772624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1773624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1774624407d2SRussell King bool los = false; 177573970055SRussell King 1776710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1777624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1778624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 177973970055SRussell King */ 1780624407d2SRussell King if (los_options == los_inverted) 1781624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1782624407d2SRussell King else if (los_options == los_normal) 1783624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 178473970055SRussell King 178573970055SRussell King if (los) 178673970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 178773970055SRussell King else 178873970055SRussell King sfp_sm_link_up(sfp); 178973970055SRussell King } 179073970055SRussell King 1791710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1792710dfbb0SRussell King { 1793624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1794624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1795624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1796624407d2SRussell King 1797624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1798624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1799710dfbb0SRussell King } 1800710dfbb0SRussell King 1801710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1802710dfbb0SRussell King { 1803624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1804624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1805624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1806624407d2SRussell King 1807624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1808624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1809710dfbb0SRussell King } 1810710dfbb0SRussell King 181163ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 181273970055SRussell King { 1813281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1814516b29edSFlorian Fainelli dev_err(sfp->dev, 1815516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 181673970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 181773970055SRussell King } else { 181873970055SRussell King if (warn) 181973970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 182073970055SRussell King 182163ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 182273970055SRussell King } 182373970055SRussell King } 182473970055SRussell King 1825e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1826e85b1347SMarek Behún { 1827e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1828e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1829e85b1347SMarek Behún 1830e85b1347SMarek Behún return 0; 1831e85b1347SMarek Behún } 1832e85b1347SMarek Behún 18339a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 18349a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 18359a484621SRussell King * or clause 45 PHY. 18369a484621SRussell King * 18379a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 18389a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 18399a484621SRussell King * PHY driver to determine. 18409a484621SRussell King * 18419a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 18429a484621SRussell King * mode according to the negotiated line speed. 18439a484621SRussell King */ 1844256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1845181f29daSRussell King { 1846256e43cbSRussell King int err = 0; 1847256e43cbSRussell King 1848e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1849e85b1347SMarek Behún case MDIO_I2C_NONE: 18509a484621SRussell King break; 18519a484621SRussell King 1852e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1853324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 18549a484621SRussell King break; 1855e85b1347SMarek Behún 1856e85b1347SMarek Behún case MDIO_I2C_C45: 1857324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1858e85b1347SMarek Behún break; 185909bbedacSMarek Behún 186009bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1861324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 186209bbedacSMarek Behún break; 18639a484621SRussell King } 1864e85b1347SMarek Behún 1865256e43cbSRussell King return err; 186673970055SRussell King } 186773970055SRussell King 1868ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 18693bb35261SJon Nettleton { 1870ed32abb1SRussell King u32 power_mW = 1000; 18715765cee1SRussell King (Oracle) bool supports_a2; 18723bb35261SJon Nettleton 187318cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 187418cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1875ed32abb1SRussell King power_mW = 1500; 1876f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1877f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1878f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1879ed32abb1SRussell King power_mW = 2000; 18803bb35261SJon Nettleton 188102eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 188202eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 188302eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 188402eaf5a7SRussell King (Oracle) return 0; 188502eaf5a7SRussell King (Oracle) } 188602eaf5a7SRussell King (Oracle) 18875765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 18885765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 18895765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 18905765cee1SRussell King (Oracle) 1891ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 18927cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 18935765cee1SRussell King (Oracle) if (!supports_a2) { 18947cfa9c92SRussell King /* The module appears not to implement bus address 18957cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 18967cfa9c92SRussell King * indicated mode. 18977cfa9c92SRussell King */ 18983bb35261SJon Nettleton dev_err(sfp->dev, 18993bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1900ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 19013bb35261SJon Nettleton return -EINVAL; 19027cfa9c92SRussell King } else { 19033bb35261SJon Nettleton dev_warn(sfp->dev, 19043bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1905ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 19063bb35261SJon Nettleton return 0; 19073bb35261SJon Nettleton } 19087cfa9c92SRussell King } 19097cfa9c92SRussell King 19105765cee1SRussell King (Oracle) if (!supports_a2) { 19115765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 19125765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 19135765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 19145765cee1SRussell King (Oracle) */ 19155765cee1SRussell King (Oracle) return 0; 19165765cee1SRussell King (Oracle) } 19175765cee1SRussell King (Oracle) 19187cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 19197cfa9c92SRussell King * an address change sequence, warn the user that the module may 19207cfa9c92SRussell King * not be functional. 19217cfa9c92SRussell King */ 19225765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 19237cfa9c92SRussell King dev_warn(sfp->dev, 192407f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 19257cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 19267cfa9c92SRussell King return 0; 19277cfa9c92SRussell King } 19283bb35261SJon Nettleton 1929ed32abb1SRussell King sfp->module_power_mW = power_mW; 1930ed32abb1SRussell King 1931ed32abb1SRussell King return 0; 1932ed32abb1SRussell King } 1933ed32abb1SRussell King 1934b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1935ed32abb1SRussell King { 1936ed32abb1SRussell King int err; 1937ed32abb1SRussell King 1938bd1432f6SRussell King (Oracle) err = sfp_modify_u8(sfp, true, SFP_EXT_STATUS, 1939bd1432f6SRussell King (Oracle) SFP_EXT_STATUS_PWRLVL_SELECT, 1940bd1432f6SRussell King (Oracle) enable ? SFP_EXT_STATUS_PWRLVL_SELECT : 0); 1941bd1432f6SRussell King (Oracle) if (err != sizeof(u8)) { 1942bd1432f6SRussell King (Oracle) dev_err(sfp->dev, "failed to %sable high power: %pe\n", 1943bd1432f6SRussell King (Oracle) enable ? "en" : "dis", ERR_PTR(err)); 1944b036a554SRussell King return -EAGAIN; 19453bb35261SJon Nettleton } 19463bb35261SJon Nettleton 1947b036a554SRussell King if (enable) 19483bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1949ed32abb1SRussell King sfp->module_power_mW / 1000, 1950ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 19513bb35261SJon Nettleton 1952b036a554SRussell King return 0; 19533bb35261SJon Nettleton } 19543bb35261SJon Nettleton 1955*fc082b39SRussell King (Oracle) static void sfp_module_parse_rate_select(struct sfp *sfp) 1956*fc082b39SRussell King (Oracle) { 1957*fc082b39SRussell King (Oracle) u8 rate_id; 1958*fc082b39SRussell King (Oracle) 1959*fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 0; 1960*fc082b39SRussell King (Oracle) sfp->rs_state_mask = 0; 1961*fc082b39SRussell King (Oracle) 1962*fc082b39SRussell King (Oracle) if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_RATE_SELECT))) 1963*fc082b39SRussell King (Oracle) /* No support for RateSelect */ 1964*fc082b39SRussell King (Oracle) return; 1965*fc082b39SRussell King (Oracle) 1966*fc082b39SRussell King (Oracle) /* Default to INF-8074 RateSelect operation. The signalling threshold 1967*fc082b39SRussell King (Oracle) * rate is not well specified, so always select "Full Bandwidth", but 1968*fc082b39SRussell King (Oracle) * SFF-8079 reveals that it is understood that RS0 will be low for 1969*fc082b39SRussell King (Oracle) * 1.0625Gb/s and high for 2.125Gb/s. Choose a value half-way between. 1970*fc082b39SRussell King (Oracle) * This method exists prior to SFF-8472. 1971*fc082b39SRussell King (Oracle) */ 1972*fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 1973*fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 1594; 1974*fc082b39SRussell King (Oracle) 1975*fc082b39SRussell King (Oracle) /* Parse the rate identifier, which is complicated due to history: 1976*fc082b39SRussell King (Oracle) * SFF-8472 rev 9.5 marks this field as reserved. 1977*fc082b39SRussell King (Oracle) * SFF-8079 references SFF-8472 rev 9.5 and defines bit 0. SFF-8472 1978*fc082b39SRussell King (Oracle) * compliance is not required. 1979*fc082b39SRussell King (Oracle) * SFF-8472 rev 10.2 defines this field using values 0..4 1980*fc082b39SRussell King (Oracle) * SFF-8472 rev 11.0 redefines this field with bit 0 for SFF-8079 1981*fc082b39SRussell King (Oracle) * and even values. 1982*fc082b39SRussell King (Oracle) */ 1983*fc082b39SRussell King (Oracle) rate_id = sfp->id.base.rate_id; 1984*fc082b39SRussell King (Oracle) if (rate_id == 0) 1985*fc082b39SRussell King (Oracle) /* Unspecified */ 1986*fc082b39SRussell King (Oracle) return; 1987*fc082b39SRussell King (Oracle) 1988*fc082b39SRussell King (Oracle) /* SFF-8472 rev 10.0..10.4 did not account for SFF-8079 using bit 0, 1989*fc082b39SRussell King (Oracle) * and allocated value 3 to SFF-8431 independent tx/rx rate select. 1990*fc082b39SRussell King (Oracle) * Convert this to a SFF-8472 rev 11.0 rate identifier. 1991*fc082b39SRussell King (Oracle) */ 1992*fc082b39SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 1993*fc082b39SRussell King (Oracle) sfp->id.ext.sff8472_compliance < SFP_SFF8472_COMPLIANCE_REV11_0 && 1994*fc082b39SRussell King (Oracle) rate_id == 3) 1995*fc082b39SRussell King (Oracle) rate_id = SFF_RID_8431; 1996*fc082b39SRussell King (Oracle) 1997*fc082b39SRussell King (Oracle) if (rate_id & SFF_RID_8079) { 1998*fc082b39SRussell King (Oracle) /* SFF-8079 RateSelect / Application Select in conjunction with 1999*fc082b39SRussell King (Oracle) * SFF-8472 rev 9.5. SFF-8079 defines rate_id as a bitfield 2000*fc082b39SRussell King (Oracle) * with only bit 0 used, which takes precedence over SFF-8472. 2001*fc082b39SRussell King (Oracle) */ 2002*fc082b39SRussell King (Oracle) if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_APP_SELECT_SFF8079)) { 2003*fc082b39SRussell King (Oracle) /* SFF-8079 Part 1 - rate selection between Fibre 2004*fc082b39SRussell King (Oracle) * Channel 1.0625/2.125/4.25 Gbd modes. Note that RS0 2005*fc082b39SRussell King (Oracle) * is high for 2125, so we have to subtract 1 to 2006*fc082b39SRussell King (Oracle) * include it. 2007*fc082b39SRussell King (Oracle) */ 2008*fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 2125 - 1; 2009*fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 2010*fc082b39SRussell King (Oracle) } 2011*fc082b39SRussell King (Oracle) return; 2012*fc082b39SRussell King (Oracle) } 2013*fc082b39SRussell King (Oracle) 2014*fc082b39SRussell King (Oracle) /* SFF-8472 rev 9.5 does not define the rate identifier */ 2015*fc082b39SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance <= SFP_SFF8472_COMPLIANCE_REV9_5) 2016*fc082b39SRussell King (Oracle) return; 2017*fc082b39SRussell King (Oracle) 2018*fc082b39SRussell King (Oracle) /* SFF-8472 rev 11.0 defines rate_id as a numerical value which will 2019*fc082b39SRussell King (Oracle) * always have bit 0 clear due to SFF-8079's bitfield usage of rate_id. 2020*fc082b39SRussell King (Oracle) */ 2021*fc082b39SRussell King (Oracle) switch (rate_id) { 2022*fc082b39SRussell King (Oracle) case SFF_RID_8431_RX_ONLY: 2023*fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2024*fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 2025*fc082b39SRussell King (Oracle) break; 2026*fc082b39SRussell King (Oracle) 2027*fc082b39SRussell King (Oracle) case SFF_RID_8431_TX_ONLY: 2028*fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2029*fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS1; 2030*fc082b39SRussell King (Oracle) break; 2031*fc082b39SRussell King (Oracle) 2032*fc082b39SRussell King (Oracle) case SFF_RID_8431: 2033*fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2034*fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0 | SFP_F_RS1; 2035*fc082b39SRussell King (Oracle) break; 2036*fc082b39SRussell King (Oracle) 2037*fc082b39SRussell King (Oracle) case SFF_RID_10G8G: 2038*fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 9000; 2039*fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0 | SFP_F_RS1; 2040*fc082b39SRussell King (Oracle) break; 2041*fc082b39SRussell King (Oracle) } 2042*fc082b39SRussell King (Oracle) } 2043*fc082b39SRussell King (Oracle) 2044426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 2045426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 2046426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 2047426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 2048426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 2049426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 2050426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 2051426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 2052426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 2053426c6cbcSPali Rohár * at a time. 20540d035bedSRussell King */ 2055426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 20560d035bedSRussell King { 2057426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 20580d035bedSRussell King 2059426c6cbcSPali Rohár /* Already using byte IO */ 2060426c6cbcSPali Rohár if (block_size == 1) 2061426c6cbcSPali Rohár return false; 2062426c6cbcSPali Rohár 2063426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 2064426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 2065426c6cbcSPali Rohár return false; 20660d035bedSRussell King } 2067426c6cbcSPali Rohár return true; 20680d035bedSRussell King } 20690d035bedSRussell King 2070b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 2071b18432c5SChris Healy { 2072b18432c5SChris Healy u8 check; 2073b18432c5SChris Healy int err; 2074b18432c5SChris Healy 2075b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 2076b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 2077b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 2078b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 2079b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 2080b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 2081b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 2082b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 2083b18432c5SChris Healy if (err != 3) { 20849ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 20859ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 20869ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 2087b18432c5SChris Healy return err; 2088b18432c5SChris Healy } 2089b18432c5SChris Healy 2090b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 2091b18432c5SChris Healy mdelay(50); 2092b18432c5SChris Healy 2093b18432c5SChris Healy /* Update base structure checksum */ 2094b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 2095b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 2096b18432c5SChris Healy if (err != 1) { 20979ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 20989ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 20999ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 2100b18432c5SChris Healy return err; 2101b18432c5SChris Healy } 2102b18432c5SChris Healy } 2103b18432c5SChris Healy return 0; 2104b18432c5SChris Healy } 2105b18432c5SChris Healy 2106f94b9bedSRussell King (Oracle) static int sfp_module_parse_sff8472(struct sfp *sfp) 2107f94b9bedSRussell King (Oracle) { 2108f94b9bedSRussell King (Oracle) /* If the module requires address swap mode, warn about it */ 2109f94b9bedSRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 2110f94b9bedSRussell King (Oracle) dev_warn(sfp->dev, 2111f94b9bedSRussell King (Oracle) "module address swap to access page 0xA2 is not supported.\n"); 2112f94b9bedSRussell King (Oracle) else 2113f94b9bedSRussell King (Oracle) sfp->have_a2 = true; 2114f94b9bedSRussell King (Oracle) 2115f94b9bedSRussell King (Oracle) return 0; 2116f94b9bedSRussell King (Oracle) } 2117f94b9bedSRussell King (Oracle) 2118e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 211973970055SRussell King { 212073970055SRussell King /* SFP module inserted - read I2C data */ 212173970055SRussell King struct sfp_eeprom_id id; 2122b18432c5SChris Healy bool cotsworks_sfbg; 21231974fd3bSRussell King (Oracle) unsigned int mask; 2124981f1f80SRussell King bool cotsworks; 212573970055SRussell King u8 check; 21263bb35261SJon Nettleton int ret; 212773970055SRussell King 2128813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 21290d035bedSRussell King 21300d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 21313bb35261SJon Nettleton if (ret < 0) { 2132e117be74SRussell King if (report) 21339ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 21349ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 213573970055SRussell King return -EAGAIN; 213673970055SRussell King } 213773970055SRussell King 21380d035bedSRussell King if (ret != sizeof(id.base)) { 21399ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 214073970055SRussell King return -EAGAIN; 214173970055SRussell King } 214273970055SRussell King 2143426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 2144426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 2145426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 2146426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 2147426c6cbcSPali Rohár * is really required and we have no other option. 2148426c6cbcSPali Rohár */ 2149426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 2150426c6cbcSPali Rohár dev_info(sfp->dev, 2151426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 2152426c6cbcSPali Rohár dev_info(sfp->dev, 2153426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 2154426c6cbcSPali Rohár sfp->i2c_block_size = 1; 2155426c6cbcSPali Rohár 2156426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 2157426c6cbcSPali Rohár if (ret < 0) { 2158426c6cbcSPali Rohár if (report) 21599ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 21609ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 21619ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2162426c6cbcSPali Rohár return -EAGAIN; 2163426c6cbcSPali Rohár } 2164426c6cbcSPali Rohár 2165426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 21669ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 21679ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2168426c6cbcSPali Rohár return -EAGAIN; 2169426c6cbcSPali Rohár } 2170426c6cbcSPali Rohár } 2171426c6cbcSPali Rohár 2172981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 2173981f1f80SRussell King * do the final programming with the final module part number, 2174981f1f80SRussell King * serial number and date code. 2175981f1f80SRussell King */ 2176981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 2177b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 2178b18432c5SChris Healy 2179b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 2180b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 2181b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 2182b18432c5SChris Healy */ 2183b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 2184b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 2185b18432c5SChris Healy if (ret < 0) 2186b18432c5SChris Healy return ret; 2187b18432c5SChris Healy } 2188981f1f80SRussell King 218973970055SRussell King /* Validate the checksum over the base structure */ 219073970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 219173970055SRussell King if (check != id.base.cc_base) { 2192981f1f80SRussell King if (cotsworks) { 2193981f1f80SRussell King dev_warn(sfp->dev, 2194981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 2195981f1f80SRussell King check, id.base.cc_base); 2196981f1f80SRussell King } else { 219773970055SRussell King dev_err(sfp->dev, 2198981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2199981f1f80SRussell King check, id.base.cc_base); 220073970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2201981f1f80SRussell King 16, 1, &id, sizeof(id), true); 220273970055SRussell King return -EINVAL; 220373970055SRussell King } 2204981f1f80SRussell King } 220573970055SRussell King 22060d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 22070d035bedSRussell King if (ret < 0) { 22080d035bedSRussell King if (report) 22099ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 22109ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 22110d035bedSRussell King return -EAGAIN; 22120d035bedSRussell King } 22130d035bedSRussell King 22140d035bedSRussell King if (ret != sizeof(id.ext)) { 22159ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 22160d035bedSRussell King return -EAGAIN; 22170d035bedSRussell King } 22180d035bedSRussell King 221973970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 222073970055SRussell King if (check != id.ext.cc_ext) { 2221981f1f80SRussell King if (cotsworks) { 2222981f1f80SRussell King dev_warn(sfp->dev, 2223981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2224981f1f80SRussell King check, id.ext.cc_ext); 2225981f1f80SRussell King } else { 222673970055SRussell King dev_err(sfp->dev, 2227981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2228981f1f80SRussell King check, id.ext.cc_ext); 2229981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2230981f1f80SRussell King 16, 1, &id, sizeof(id), true); 223173970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 223273970055SRussell King } 2233981f1f80SRussell King } 223473970055SRussell King 223573970055SRussell King sfp->id = id; 223673970055SRussell King 2237a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2238a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2239a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2240a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2241a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2242a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 224373970055SRussell King 2244259c8618SRussell King /* Check whether we support this module */ 2245f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2246259c8618SRussell King dev_err(sfp->dev, 2247259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 224873970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 224973970055SRussell King return -EINVAL; 225073970055SRussell King } 225173970055SRussell King 2252f94b9bedSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance != SFP_SFF8472_COMPLIANCE_NONE) { 2253f94b9bedSRussell King (Oracle) ret = sfp_module_parse_sff8472(sfp); 2254f94b9bedSRussell King (Oracle) if (ret < 0) 2255f94b9bedSRussell King (Oracle) return ret; 2256f94b9bedSRussell King (Oracle) } 2257ec7681bdSRussell King 2258ed32abb1SRussell King /* Parse the module power requirement */ 2259ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2260ed32abb1SRussell King if (ret < 0) 2261ed32abb1SRussell King return ret; 2262ed32abb1SRussell King 2263*fc082b39SRussell King (Oracle) sfp_module_parse_rate_select(sfp); 2264*fc082b39SRussell King (Oracle) 22651974fd3bSRussell King (Oracle) mask = SFP_F_PRESENT; 22668475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 22671974fd3bSRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 22688475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 22691974fd3bSRussell King (Oracle) mask |= SFP_F_TX_FAULT; 22708475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 22711974fd3bSRussell King (Oracle) mask |= SFP_F_LOS; 2272*fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0]) 2273*fc082b39SRussell King (Oracle) mask |= SFP_F_RS0; 2274*fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS1]) 2275*fc082b39SRussell King (Oracle) mask |= SFP_F_RS1; 22768475c4b7SRussell King (Oracle) 227726c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2278324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 227926c97a2dSRussell King 22802069624dSMatthew Hagan sfp->tx_fault_ignore = false; 22812069624dSMatthew Hagan 2282e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2283e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2284e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2285e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2286e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2287e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2288e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2289e85b1347SMarek Behún else 2290e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2291e85b1347SMarek Behún 229223571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 22931974fd3bSRussell King (Oracle) 22941974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 22951974fd3bSRussell King (Oracle) /* Initialise state bits to use from hardware */ 22961974fd3bSRussell King (Oracle) sfp->state_hw_mask = mask; 22971974fd3bSRussell King (Oracle) 2298*fc082b39SRussell King (Oracle) /* We want to drive the rate select pins that the module is using */ 2299*fc082b39SRussell King (Oracle) sfp->state_hw_drive |= sfp->rs_state_mask; 2300*fc082b39SRussell King (Oracle) 230127541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 230227541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 23031974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 230423571c7bSRussell King (Oracle) 2305b036a554SRussell King return 0; 230673970055SRussell King } 230773970055SRussell King 230873970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 230973970055SRussell King { 231073f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 231173970055SRussell King sfp_module_remove(sfp->sfp_bus); 231273970055SRussell King 23131323061aSAndrew Lunn sfp_hwmon_remove(sfp); 23141323061aSAndrew Lunn 231573970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2316ed32abb1SRussell King sfp->module_power_mW = 0; 2317*fc082b39SRussell King (Oracle) sfp->state_hw_drive = SFP_F_TX_DISABLE; 2318f94b9bedSRussell King (Oracle) sfp->have_a2 = false; 231973970055SRussell King 232073970055SRussell King dev_info(sfp->dev, "module removed\n"); 232173970055SRussell King } 232273970055SRussell King 23236b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2324e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 232573970055SRussell King { 2326e85d81a1SRussell King switch (sfp->sm_dev_state) { 2327e85d81a1SRussell King default: 23286b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 23296b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 23306b0da5c9SRussell King break; 23316b0da5c9SRussell King 23326b0da5c9SRussell King case SFP_DEV_DOWN: 23336b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 23346b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 23356b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2336e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2337e85d81a1SRussell King break; 233873970055SRussell King 2339e85d81a1SRussell King case SFP_DEV_UP: 23406b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 23416b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 23426b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2343e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2344e85d81a1SRussell King break; 2345e85d81a1SRussell King } 2346e85d81a1SRussell King } 234773970055SRussell King 2348d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2349d900954fSRussell King * the on-board EEPROM, and sets up the power level. 235073970055SRussell King */ 2351e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2352e85d81a1SRussell King { 2353b036a554SRussell King int err; 2354b036a554SRussell King 2355b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2356b036a554SRussell King if (event == SFP_E_REMOVE) { 2357d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2358d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2359b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2360b036a554SRussell King return; 2361b036a554SRussell King } 2362b036a554SRussell King 2363b036a554SRussell King /* Handle device detach globally */ 236473f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 236573f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2366b036a554SRussell King if (sfp->module_power_mW > 1000 && 2367b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2368b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 236973f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2370d2e816c0SRussell King return; 2371d2e816c0SRussell King } 2372d2e816c0SRussell King 237373970055SRussell King switch (sfp->sm_mod_state) { 237473970055SRussell King default: 2375e117be74SRussell King if (event == SFP_E_INSERT) { 2376d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2377e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2378e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2379e117be74SRussell King } 238073970055SRussell King break; 238173970055SRussell King 238273970055SRussell King case SFP_MOD_PROBE: 238373f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2384b036a554SRussell King if (event != SFP_E_TIMEOUT) 2385b036a554SRussell King break; 238673970055SRussell King 2387e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2388b036a554SRussell King if (err == -EAGAIN) { 2389e117be74SRussell King if (sfp->sm_mod_tries_init && 2390e117be74SRussell King --sfp->sm_mod_tries_init) { 2391e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2392b036a554SRussell King break; 2393e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2394e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2395e117be74SRussell King dev_warn(sfp->dev, 2396e117be74SRussell King "please wait, module slow to respond\n"); 2397e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2398e117be74SRussell King break; 2399e117be74SRussell King } 2400b036a554SRussell King } 2401b036a554SRussell King if (err < 0) { 2402b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2403b036a554SRussell King break; 2404b036a554SRussell King } 2405b036a554SRussell King 240604361b8bSRussell King (Oracle) /* Force a poll to re-read the hardware signal state after 240704361b8bSRussell King (Oracle) * sfp_sm_mod_probe() changed state_hw_mask. 240804361b8bSRussell King (Oracle) */ 240904361b8bSRussell King (Oracle) mod_delayed_work(system_wq, &sfp->poll, 1); 241004361b8bSRussell King (Oracle) 241138ecd706SRussell King err = sfp_hwmon_insert(sfp); 241238ecd706SRussell King if (err) 24139ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 24149ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 241538ecd706SRussell King 241673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2417df561f66SGustavo A. R. Silva fallthrough; 241873f5e847SRussell King case SFP_MOD_WAITDEV: 241973f5e847SRussell King /* Ensure that the device is attached before proceeding */ 242073f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 242173f5e847SRussell King break; 242273f5e847SRussell King 242373f5e847SRussell King /* Report the module insertion to the upstream device */ 242423571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 242523571c7bSRussell King (Oracle) sfp->quirk); 242673f5e847SRussell King if (err < 0) { 242773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 242873f5e847SRussell King break; 242973f5e847SRussell King } 243073f5e847SRussell King 2431b036a554SRussell King /* If this is a power level 1 module, we are done */ 2432b036a554SRussell King if (sfp->module_power_mW <= 1000) 2433b036a554SRussell King goto insert; 2434b036a554SRussell King 2435b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2436df561f66SGustavo A. R. Silva fallthrough; 2437b036a554SRussell King case SFP_MOD_HPOWER: 2438b036a554SRussell King /* Enable high power mode */ 2439b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 244073f5e847SRussell King if (err < 0) { 244173f5e847SRussell King if (err != -EAGAIN) { 244273f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 24430936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 244473f5e847SRussell King } else { 2445e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 244673f5e847SRussell King } 244773f5e847SRussell King break; 244873f5e847SRussell King } 244973f5e847SRussell King 245073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 245173970055SRussell King break; 245273970055SRussell King 2453b036a554SRussell King case SFP_MOD_WAITPWR: 2454b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2455b036a554SRussell King if (event != SFP_E_TIMEOUT) 2456b036a554SRussell King break; 2457b036a554SRussell King 2458b036a554SRussell King insert: 24590936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 24603bb35261SJon Nettleton break; 2461b036a554SRussell King 246273970055SRussell King case SFP_MOD_PRESENT: 246373970055SRussell King case SFP_MOD_ERROR: 246473970055SRussell King break; 246573970055SRussell King } 246673970055SRussell King } 246773970055SRussell King 2468e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2469e85d81a1SRussell King { 2470eefa6f1fSRussell King unsigned long timeout; 24711cb89a14SRussell King int ret; 2472eefa6f1fSRussell King 247373970055SRussell King /* Some events are global */ 247473970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 247573970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 247673970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 247773970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 247873970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 247973970055SRussell King sfp_sm_link_down(sfp); 248074c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 248174c551caSRussell King sfp_module_stop(sfp->sfp_bus); 248273970055SRussell King if (sfp->mod_phy) 248373970055SRussell King sfp_sm_phy_detach(sfp); 2484e85b1347SMarek Behún if (sfp->i2c_mii) 2485e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 24861539e0d3SRussell King sfp_module_tx_disable(sfp); 2487f3c9a666SRussell King sfp_soft_stop_poll(sfp); 248873970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 248973970055SRussell King return; 249073970055SRussell King } 249173970055SRussell King 249273970055SRussell King /* The main state machine */ 249373970055SRussell King switch (sfp->sm_state) { 249473970055SRussell King case SFP_S_DOWN: 2495eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2496eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2497eefa6f1fSRussell King break; 2498eefa6f1fSRussell King 24995daed426SRussell King (Oracle) /* Only use the soft state bits if we have access to the A2h 25005daed426SRussell King (Oracle) * memory, which implies that we have some level of SFF-8472 25015daed426SRussell King (Oracle) * compliance. 25025daed426SRussell King (Oracle) */ 25035daed426SRussell King (Oracle) if (sfp->have_a2) 2504f3c9a666SRussell King sfp_soft_start_poll(sfp); 2505f3c9a666SRussell King 2506f3c9a666SRussell King sfp_module_tx_enable(sfp); 2507eefa6f1fSRussell King 2508eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2509281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2510eefa6f1fSRussell King 2511eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2512eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2513324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2514324e88cbSMarek Behún * specific modules). 2515eefa6f1fSRussell King */ 2516324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2517eefa6f1fSRussell King break; 2518eefa6f1fSRussell King 2519eefa6f1fSRussell King case SFP_S_WAIT: 2520eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2521eefa6f1fSRussell King break; 2522eefa6f1fSRussell King 2523eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 252426c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 252526c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 252626c97a2dSRussell King * initialise, which is indicated by TX_FAULT 252726c97a2dSRussell King * deasserting. 2528181f29daSRussell King */ 252926c97a2dSRussell King timeout = sfp->module_t_start_up; 2530324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2531324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2532eefa6f1fSRussell King else 2533eefa6f1fSRussell King timeout = 1; 2534eefa6f1fSRussell King 2535eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2536eefa6f1fSRussell King } else { 2537eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2538eefa6f1fSRussell King * finished initialising. 2539eefa6f1fSRussell King */ 2540eefa6f1fSRussell King goto init_done; 2541181f29daSRussell King } 254273970055SRussell King break; 254373970055SRussell King 254473970055SRussell King case SFP_S_INIT: 2545d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2546e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 254726c97a2dSRussell King * or t_start_up, so assume there is a fault. 2548d23751a0SRussell King */ 2549d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2550281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2551d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 25521cb89a14SRussell King init_done: 2553e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2554e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2555e85b1347SMarek Behún if (ret < 0) { 2556e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2557e85b1347SMarek Behún break; 2558e85b1347SMarek Behún } 25591cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 25601cb89a14SRussell King goto phy_probe; 25611cb89a14SRussell King } 25621cb89a14SRussell King break; 25631cb89a14SRussell King 25641cb89a14SRussell King case SFP_S_INIT_PHY: 25651cb89a14SRussell King if (event != SFP_E_TIMEOUT) 25661cb89a14SRussell King break; 25671cb89a14SRussell King phy_probe: 25681cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2569d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2570d23751a0SRussell King */ 25711cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 25721cb89a14SRussell King if (ret == -ENODEV) { 25731cb89a14SRussell King if (--sfp->sm_phy_retries) { 25741cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 25751cb89a14SRussell King break; 25761cb89a14SRussell King } else { 25771cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 25781cb89a14SRussell King } 25791cb89a14SRussell King } else if (ret) { 2580256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2581256e43cbSRussell King break; 2582256e43cbSRussell King } 258374c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 258474c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 258574c551caSRussell King break; 258674c551caSRussell King } 2587d23751a0SRussell King sfp_sm_link_check_los(sfp); 2588d23751a0SRussell King 2589d23751a0SRussell King /* Reset the fault retry count */ 2590281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2591d23751a0SRussell King break; 2592d23751a0SRussell King 2593d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2594d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2595d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 259626c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2597d23751a0SRussell King } 259873970055SRussell King break; 259973970055SRussell King 260073970055SRussell King case SFP_S_WAIT_LOS: 260173970055SRussell King if (event == SFP_E_TX_FAULT) 260263ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2603710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 260473970055SRussell King sfp_sm_link_up(sfp); 260573970055SRussell King break; 260673970055SRussell King 260773970055SRussell King case SFP_S_LINK_UP: 260873970055SRussell King if (event == SFP_E_TX_FAULT) { 260973970055SRussell King sfp_sm_link_down(sfp); 261063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2611710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 261273970055SRussell King sfp_sm_link_down(sfp); 261373970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 261473970055SRussell King } 261573970055SRussell King break; 261673970055SRussell King 261773970055SRussell King case SFP_S_TX_FAULT: 261873970055SRussell King if (event == SFP_E_TIMEOUT) { 261973970055SRussell King sfp_module_tx_fault_reset(sfp); 262026c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 262173970055SRussell King } 262273970055SRussell King break; 262373970055SRussell King 262473970055SRussell King case SFP_S_REINIT: 262573970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 262663ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 262773970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 262873970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 262973970055SRussell King sfp_sm_link_check_los(sfp); 263073970055SRussell King } 263173970055SRussell King break; 263273970055SRussell King 263373970055SRussell King case SFP_S_TX_DISABLE: 263473970055SRussell King break; 263573970055SRussell King } 2636e85d81a1SRussell King } 2637e85d81a1SRussell King 263897a49205SRussell King (Oracle) static void __sfp_sm_event(struct sfp *sfp, unsigned int event) 2639e85d81a1SRussell King { 2640e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2641e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2642e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2643e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2644e85d81a1SRussell King event_to_str(event)); 2645e85d81a1SRussell King 2646e85d81a1SRussell King sfp_sm_device(sfp, event); 26476b0da5c9SRussell King sfp_sm_module(sfp, event); 2648e85d81a1SRussell King sfp_sm_main(sfp, event); 264973970055SRussell King 26504005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 26514005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 26524005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 26534005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 265497a49205SRussell King (Oracle) } 265573970055SRussell King 265697a49205SRussell King (Oracle) static void sfp_sm_event(struct sfp *sfp, unsigned int event) 265797a49205SRussell King (Oracle) { 265897a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 265997a49205SRussell King (Oracle) __sfp_sm_event(sfp, event); 266073970055SRussell King mutex_unlock(&sfp->sm_mutex); 266173970055SRussell King } 266273970055SRussell King 2663b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2664b5bfc21aSRussell King { 26656b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2666b5bfc21aSRussell King } 2667b5bfc21aSRussell King 2668b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2669b5bfc21aSRussell King { 26706b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2671b5bfc21aSRussell King } 2672b5bfc21aSRussell King 267373970055SRussell King static void sfp_start(struct sfp *sfp) 267473970055SRussell King { 267573970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 267673970055SRussell King } 267773970055SRussell King 267873970055SRussell King static void sfp_stop(struct sfp *sfp) 267973970055SRussell King { 268073970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 268173970055SRussell King } 268273970055SRussell King 2683dc185822SRussell King (Oracle) static void sfp_set_signal_rate(struct sfp *sfp, unsigned int rate_kbd) 2684dc185822SRussell King (Oracle) { 2685*fc082b39SRussell King (Oracle) unsigned int set; 2686*fc082b39SRussell King (Oracle) 2687*fc082b39SRussell King (Oracle) sfp->rate_kbd = rate_kbd; 2688*fc082b39SRussell King (Oracle) 2689*fc082b39SRussell King (Oracle) if (rate_kbd > sfp->rs_threshold_kbd) 2690*fc082b39SRussell King (Oracle) set = sfp->rs_state_mask; 2691*fc082b39SRussell King (Oracle) else 2692*fc082b39SRussell King (Oracle) set = 0; 2693*fc082b39SRussell King (Oracle) 2694*fc082b39SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_RS0 | SFP_F_RS1, set); 2695dc185822SRussell King (Oracle) } 2696dc185822SRussell King (Oracle) 269773970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 269873970055SRussell King { 269973970055SRussell King /* locking... and check module is present */ 270073970055SRussell King 2701ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2702ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 270373970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 270473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 270573970055SRussell King } else { 270673970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 270773970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 270873970055SRussell King } 270973970055SRussell King return 0; 271073970055SRussell King } 271173970055SRussell King 271273970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 271373970055SRussell King u8 *data) 271473970055SRussell King { 271573970055SRussell King unsigned int first, last, len; 271673970055SRussell King int ret; 271773970055SRussell King 2718bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2719bef227c1SIvan Bornyakov return -ENODEV; 2720bef227c1SIvan Bornyakov 272173970055SRussell King if (ee->len == 0) 272273970055SRussell King return -EINVAL; 272373970055SRussell King 272473970055SRussell King first = ee->offset; 272573970055SRussell King last = ee->offset + ee->len; 272673970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 272773970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 272873970055SRussell King len -= first; 272973970055SRussell King 27302794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 273173970055SRussell King if (ret < 0) 273273970055SRussell King return ret; 273373970055SRussell King 273473970055SRussell King first += len; 273573970055SRussell King data += len; 273673970055SRussell King } 27372794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 273873970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 273973970055SRussell King len -= first; 274073970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 274173970055SRussell King 27422794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 274373970055SRussell King if (ret < 0) 274473970055SRussell King return ret; 274573970055SRussell King } 274673970055SRussell King return 0; 274773970055SRussell King } 274873970055SRussell King 2749d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2750d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2751d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2752d740513fSAndrew Lunn { 2753bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2754bef227c1SIvan Bornyakov return -ENODEV; 2755bef227c1SIvan Bornyakov 2756d740513fSAndrew Lunn if (page->bank) { 2757d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2758d740513fSAndrew Lunn return -EOPNOTSUPP; 2759d740513fSAndrew Lunn } 2760d740513fSAndrew Lunn 2761d740513fSAndrew Lunn if (page->page) { 2762d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2763d740513fSAndrew Lunn return -EOPNOTSUPP; 2764d740513fSAndrew Lunn } 2765d740513fSAndrew Lunn 2766d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2767d740513fSAndrew Lunn page->i2c_address != 0x51) { 2768d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2769d740513fSAndrew Lunn return -EOPNOTSUPP; 2770d740513fSAndrew Lunn } 2771d740513fSAndrew Lunn 2772d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2773d740513fSAndrew Lunn page->data, page->length); 2774d740513fSAndrew Lunn }; 2775d740513fSAndrew Lunn 277673970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2777b5bfc21aSRussell King .attach = sfp_attach, 2778b5bfc21aSRussell King .detach = sfp_detach, 277973970055SRussell King .start = sfp_start, 278073970055SRussell King .stop = sfp_stop, 2781dc185822SRussell King (Oracle) .set_signal_rate = sfp_set_signal_rate, 278273970055SRussell King .module_info = sfp_module_info, 278373970055SRussell King .module_eeprom = sfp_module_eeprom, 2784d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 278573970055SRussell King }; 278673970055SRussell King 278773970055SRussell King static void sfp_timeout(struct work_struct *work) 278873970055SRussell King { 278973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 279073970055SRussell King 279173970055SRussell King rtnl_lock(); 279273970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 279373970055SRussell King rtnl_unlock(); 279473970055SRussell King } 279573970055SRussell King 279673970055SRussell King static void sfp_check_state(struct sfp *sfp) 279773970055SRussell King { 279873970055SRussell King unsigned int state, i, changed; 279973970055SRussell King 2800d47e5a43SRussell King (Oracle) rtnl_lock(); 2801a9fe964eSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 280273970055SRussell King state = sfp_get_state(sfp); 280373970055SRussell King changed = state ^ sfp->state; 28042069624dSMatthew Hagan if (sfp->tx_fault_ignore) 28052069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 28062069624dSMatthew Hagan else 280773970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 280873970055SRussell King 280973970055SRussell King for (i = 0; i < GPIO_MAX; i++) 281073970055SRussell King if (changed & BIT(i)) 2811f35cb547SRussell King (Oracle) dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_names[i], 281273970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 281373970055SRussell King 2814*fc082b39SRussell King (Oracle) state |= sfp->state & SFP_F_OUTPUTS; 281573970055SRussell King sfp->state = state; 28161974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 281773970055SRussell King 281897a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 281973970055SRussell King if (changed & SFP_F_PRESENT) 282097a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_PRESENT ? 282173970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 282273970055SRussell King 282373970055SRussell King if (changed & SFP_F_TX_FAULT) 282497a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 282573970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 282673970055SRussell King 282773970055SRussell King if (changed & SFP_F_LOS) 282897a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_LOS ? 282973970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 283097a49205SRussell King (Oracle) mutex_unlock(&sfp->sm_mutex); 2831a9fe964eSRussell King (Oracle) rtnl_unlock(); 283273970055SRussell King } 283373970055SRussell King 283473970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 283573970055SRussell King { 283673970055SRussell King struct sfp *sfp = data; 283773970055SRussell King 283873970055SRussell King sfp_check_state(sfp); 283973970055SRussell King 284073970055SRussell King return IRQ_HANDLED; 284173970055SRussell King } 284273970055SRussell King 284373970055SRussell King static void sfp_poll(struct work_struct *work) 284473970055SRussell King { 284573970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 284673970055SRussell King 284773970055SRussell King sfp_check_state(sfp); 2848f3c9a666SRussell King 28491974fd3bSRussell King (Oracle) // st_mutex doesn't need to be held here for state_soft_mask, 28501974fd3bSRussell King (Oracle) // it's unimportant if we race while reading this. 2851f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2852f3c9a666SRussell King sfp->need_poll) 285373970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 285473970055SRussell King } 285573970055SRussell King 285673970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 285773970055SRussell King { 285873970055SRussell King struct sfp *sfp; 285973970055SRussell King 286073970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 286173970055SRussell King if (!sfp) 286273970055SRussell King return ERR_PTR(-ENOMEM); 286373970055SRussell King 286473970055SRussell King sfp->dev = dev; 2865813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 286673970055SRussell King 286773970055SRussell King mutex_init(&sfp->sm_mutex); 28682158e856SRobert Hancock mutex_init(&sfp->st_mutex); 286973970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 287073970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 287173970055SRussell King 2872139d3a21SRussell King sfp_hwmon_init(sfp); 2873139d3a21SRussell King 287473970055SRussell King return sfp; 287573970055SRussell King } 287673970055SRussell King 287773970055SRussell King static void sfp_cleanup(void *data) 287873970055SRussell King { 287973970055SRussell King struct sfp *sfp = data; 288073970055SRussell King 2881139d3a21SRussell King sfp_hwmon_exit(sfp); 2882139d3a21SRussell King 288373970055SRussell King cancel_delayed_work_sync(&sfp->poll); 288473970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 288573970055SRussell King if (sfp->i2c_mii) { 288673970055SRussell King mdiobus_unregister(sfp->i2c_mii); 288773970055SRussell King mdiobus_free(sfp->i2c_mii); 288873970055SRussell King } 288973970055SRussell King if (sfp->i2c) 289073970055SRussell King i2c_put_adapter(sfp->i2c); 289173970055SRussell King kfree(sfp); 289273970055SRussell King } 289373970055SRussell King 289415309fb2SRussell King (Oracle) static int sfp_i2c_get(struct sfp *sfp) 289515309fb2SRussell King (Oracle) { 289615309fb2SRussell King (Oracle) struct fwnode_handle *h; 289715309fb2SRussell King (Oracle) struct i2c_adapter *i2c; 289815309fb2SRussell King (Oracle) int err; 289915309fb2SRussell King (Oracle) 290015309fb2SRussell King (Oracle) h = fwnode_find_reference(dev_fwnode(sfp->dev), "i2c-bus", 0); 290115309fb2SRussell King (Oracle) if (IS_ERR(h)) { 290215309fb2SRussell King (Oracle) dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 290315309fb2SRussell King (Oracle) return -ENODEV; 290415309fb2SRussell King (Oracle) } 290515309fb2SRussell King (Oracle) 2906ff31a0c4SRussell King (Oracle) i2c = i2c_get_adapter_by_fwnode(h); 290715309fb2SRussell King (Oracle) if (!i2c) { 290815309fb2SRussell King (Oracle) err = -EPROBE_DEFER; 290915309fb2SRussell King (Oracle) goto put; 291015309fb2SRussell King (Oracle) } 291115309fb2SRussell King (Oracle) 291215309fb2SRussell King (Oracle) err = sfp_i2c_configure(sfp, i2c); 291315309fb2SRussell King (Oracle) if (err) 291415309fb2SRussell King (Oracle) i2c_put_adapter(i2c); 291515309fb2SRussell King (Oracle) put: 291615309fb2SRussell King (Oracle) fwnode_handle_put(h); 291715309fb2SRussell King (Oracle) return err; 291815309fb2SRussell King (Oracle) } 291915309fb2SRussell King (Oracle) 292073970055SRussell King static int sfp_probe(struct platform_device *pdev) 292173970055SRussell King { 2922259c8618SRussell King const struct sff_data *sff; 29235411ca71SChris Healy char *sfp_irq_name; 292473970055SRussell King struct sfp *sfp; 2925257c2559SRobert Hancock int err, i; 292673970055SRussell King 292773970055SRussell King sfp = sfp_alloc(&pdev->dev); 292873970055SRussell King if (IS_ERR(sfp)) 292973970055SRussell King return PTR_ERR(sfp); 293073970055SRussell King 293173970055SRussell King platform_set_drvdata(pdev, sfp); 293273970055SRussell King 29330a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 293473970055SRussell King if (err < 0) 293573970055SRussell King return err; 293673970055SRussell King 2937b71dda81SRussell King (Oracle) sff = device_get_match_data(sfp->dev); 2938b71dda81SRussell King (Oracle) if (!sff) 2939b71dda81SRussell King (Oracle) sff = &sfp_data; 2940259c8618SRussell King 2941b71dda81SRussell King (Oracle) sfp->type = sff; 29427ce236faSRuslan Babayev 294315309fb2SRussell King (Oracle) err = sfp_i2c_get(sfp); 294415309fb2SRussell King (Oracle) if (err) 294573970055SRussell King return err; 294673970055SRussell King 2947259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2948259c8618SRussell King if (sff->gpios & BIT(i)) { 294973970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 2950f35cb547SRussell King (Oracle) gpio_names[i], gpio_flags[i]); 295173970055SRussell King if (IS_ERR(sfp->gpio[i])) 295273970055SRussell King return PTR_ERR(sfp->gpio[i]); 295373970055SRussell King } 295473970055SRussell King 29558475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 2956*fc082b39SRussell King (Oracle) sfp->state_hw_drive = SFP_F_TX_DISABLE; 29578475c4b7SRussell King (Oracle) 295873970055SRussell King sfp->get_state = sfp_gpio_get_state; 295973970055SRussell King sfp->set_state = sfp_gpio_set_state; 2960259c8618SRussell King 2961259c8618SRussell King /* Modules that have no detect signal are always present */ 2962259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2963259c8618SRussell King sfp->get_state = sff_gpio_get_state; 296473970055SRussell King 29653bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 29663bb35261SJon Nettleton &sfp->max_power_mW); 296702eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 296802eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 296902eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 297002eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 29713bb35261SJon Nettleton sfp->max_power_mW = 1000; 297202eaf5a7SRussell King (Oracle) } 29733bb35261SJon Nettleton 29743bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 29753bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 29763bb35261SJon Nettleton 297773970055SRussell King /* Get the initial state, and always signal TX disable, 297873970055SRussell King * since the network interface will not be up. 297973970055SRussell King */ 298073970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 298173970055SRussell King 2982*fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0] && 2983*fc082b39SRussell King (Oracle) gpiod_get_value_cansleep(sfp->gpio[GPIO_RS0])) 2984*fc082b39SRussell King (Oracle) sfp->state |= SFP_F_RS0; 298573970055SRussell King sfp_set_state(sfp, sfp->state); 298673970055SRussell King sfp_module_tx_disable(sfp); 298773f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 298873f5e847SRussell King rtnl_lock(); 298973f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 299073f5e847SRussell King rtnl_unlock(); 299173f5e847SRussell King } 299273970055SRussell King 299373970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 299473970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 299573970055SRussell King continue; 299673970055SRussell King 2997257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 299896216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 299996216181SYueHaibing sfp->gpio_irq[i] = 0; 3000f3c9a666SRussell King sfp->need_poll = true; 300173970055SRussell King continue; 300273970055SRussell King } 300373970055SRussell King 30045411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 30055411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 3006f35cb547SRussell King (Oracle) gpio_names[i]); 30075411ca71SChris Healy 30088cb601f1SChris Healy if (!sfp_irq_name) 30098cb601f1SChris Healy return -ENOMEM; 30108cb601f1SChris Healy 3011257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 3012257c2559SRobert Hancock NULL, sfp_irq, 301373970055SRussell King IRQF_ONESHOT | 301473970055SRussell King IRQF_TRIGGER_RISING | 301573970055SRussell King IRQF_TRIGGER_FALLING, 30165411ca71SChris Healy sfp_irq_name, sfp); 3017257c2559SRobert Hancock if (err) { 3018257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 3019f3c9a666SRussell King sfp->need_poll = true; 302073970055SRussell King } 3021257c2559SRobert Hancock } 302273970055SRussell King 3023f3c9a666SRussell King if (sfp->need_poll) 302473970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 302573970055SRussell King 3026a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 3027a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 3028a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 3029a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 3030a1f5d1f0SAntoine Tenart */ 3031a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 3032a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 3033a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 3034a1f5d1f0SAntoine Tenart 3035b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 3036b5bfc21aSRussell King if (!sfp->sfp_bus) 3037b5bfc21aSRussell King return -ENOMEM; 3038b5bfc21aSRussell King 30399cc8976cSRussell King sfp_debugfs_init(sfp); 30409cc8976cSRussell King 304173970055SRussell King return 0; 304273970055SRussell King } 304373970055SRussell King 304473970055SRussell King static int sfp_remove(struct platform_device *pdev) 304573970055SRussell King { 304673970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 304773970055SRussell King 30489cc8976cSRussell King sfp_debugfs_exit(sfp); 304973970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 305073970055SRussell King 30510cb96b57SRussell King rtnl_lock(); 30520cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 30530cb96b57SRussell King rtnl_unlock(); 30540cb96b57SRussell King 305573970055SRussell King return 0; 305673970055SRussell King } 305773970055SRussell King 3058257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 3059257c2559SRobert Hancock { 3060257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 3061257c2559SRobert Hancock int i; 3062257c2559SRobert Hancock 3063257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 3064257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 3065257c2559SRobert Hancock continue; 3066257c2559SRobert Hancock 3067257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 3068257c2559SRobert Hancock } 3069257c2559SRobert Hancock 3070257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 3071257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 3072257c2559SRobert Hancock } 3073257c2559SRobert Hancock 307473970055SRussell King static struct platform_driver sfp_driver = { 307573970055SRussell King .probe = sfp_probe, 307673970055SRussell King .remove = sfp_remove, 3077257c2559SRobert Hancock .shutdown = sfp_shutdown, 307873970055SRussell King .driver = { 307973970055SRussell King .name = "sfp", 308073970055SRussell King .of_match_table = sfp_of_match, 308173970055SRussell King }, 308273970055SRussell King }; 308373970055SRussell King 308473970055SRussell King static int sfp_init(void) 308573970055SRussell King { 308673970055SRussell King poll_jiffies = msecs_to_jiffies(100); 308773970055SRussell King 308873970055SRussell King return platform_driver_register(&sfp_driver); 308973970055SRussell King } 309073970055SRussell King module_init(sfp_init); 309173970055SRussell King 309273970055SRussell King static void sfp_exit(void) 309373970055SRussell King { 309473970055SRussell King platform_driver_unregister(&sfp_driver); 309573970055SRussell King } 309673970055SRussell King module_exit(sfp_exit); 309773970055SRussell King 309873970055SRussell King MODULE_ALIAS("platform:sfp"); 309973970055SRussell King MODULE_AUTHOR("Russell King"); 310073970055SRussell King MODULE_LICENSE("GPL v2"); 3101