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, 27fc082b39SRussell King (Oracle) GPIO_RS0, 28fc082b39SRussell 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), 35fc082b39SRussell King (Oracle) SFP_F_RS0 = BIT(GPIO_RS0), 36fc082b39SRussell King (Oracle) SFP_F_RS1 = BIT(GPIO_RS1), 37fc082b39SRussell King (Oracle) 38fc082b39SRussell 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", 155fc082b39SRussell 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, 164fc082b39SRussell 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) 17326c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 17426c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17526c97a2dSRussell King 17626c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17726c97a2dSRussell King * an indicated TX_FAULT. 17826c97a2dSRussell King */ 17973970055SRussell King #define T_RESET_US 10 18073970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 18173970055SRussell King 18265ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 18365ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 18465ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18565ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18665ef2d5cSRussell King */ 18765ef2d5cSRussell King #define N_FAULT_INIT 5 18865ef2d5cSRussell King #define N_FAULT 5 18965ef2d5cSRussell King 1901cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1911cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1921cb89a14SRussell King */ 1931cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1941cb89a14SRussell King #define R_PHY_RETRY 12 1951cb89a14SRussell King 19673970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19773970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19873970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 19973970055SRussell King * 200d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 201d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 20273970055SRussell King */ 203d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 2043bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 205e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 206e117be74SRussell King #define R_PROBE_RETRY_INIT 10 207e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 208e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 20973970055SRussell King 210516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 21173970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 212324e88cbSMarek Behún * RollBall SFPs access phy via SFP Enhanced Digital Diagnostic Interface 213324e88cbSMarek Behún * via address 0x51 (mdio-i2c will use RollBall protocol on this address). 21473970055SRussell King */ 21573970055SRussell King #define SFP_PHY_ADDR 22 216324e88cbSMarek Behún #define SFP_PHY_ADDR_ROLLBALL 17 21773970055SRussell King 218813c2dd7SIvan Bornyakov /* SFP_EEPROM_BLOCK_SIZE is the size of data chunk to read the EEPROM 219813c2dd7SIvan Bornyakov * at a time. Some SFP modules and also some Linux I2C drivers do not like 220813c2dd7SIvan Bornyakov * reads longer than 16 bytes. 221813c2dd7SIvan Bornyakov */ 222813c2dd7SIvan Bornyakov #define SFP_EEPROM_BLOCK_SIZE 16 223813c2dd7SIvan Bornyakov 224259c8618SRussell King struct sff_data { 225259c8618SRussell King unsigned int gpios; 226259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 227259c8618SRussell King }; 228259c8618SRussell King 22973970055SRussell King struct sfp { 23073970055SRussell King struct device *dev; 23173970055SRussell King struct i2c_adapter *i2c; 23273970055SRussell King struct mii_bus *i2c_mii; 23373970055SRussell King struct sfp_bus *sfp_bus; 234e85b1347SMarek Behún enum mdio_i2c_proto mdio_protocol; 23573970055SRussell King struct phy_device *mod_phy; 236259c8618SRussell King const struct sff_data *type; 2370d035bedSRussell King size_t i2c_block_size; 2383bb35261SJon Nettleton u32 max_power_mW; 23973970055SRussell King 24073970055SRussell King unsigned int (*get_state)(struct sfp *); 24173970055SRussell King void (*set_state)(struct sfp *, unsigned int); 24273970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2433bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 24473970055SRussell King 24573970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 246257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 24773970055SRussell King 248f3c9a666SRussell King bool need_poll; 249f3c9a666SRussell King 2501974fd3bSRussell King (Oracle) /* Access rules: 2511974fd3bSRussell King (Oracle) * state_hw_drive: st_mutex held 2521974fd3bSRussell King (Oracle) * state_hw_mask: st_mutex held 2531974fd3bSRussell King (Oracle) * state_soft_mask: st_mutex held 2541974fd3bSRussell King (Oracle) * state: st_mutex held unless reading input bits 2551974fd3bSRussell King (Oracle) */ 2562158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 257fc082b39SRussell King (Oracle) unsigned int state_hw_drive; 2588475c4b7SRussell King (Oracle) unsigned int state_hw_mask; 259f3c9a666SRussell King unsigned int state_soft_mask; 26073970055SRussell King unsigned int state; 2611974fd3bSRussell King (Oracle) 26273970055SRussell King struct delayed_work poll; 26373970055SRussell King struct delayed_work timeout; 2642158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 26573970055SRussell King unsigned char sm_mod_state; 266e117be74SRussell King unsigned char sm_mod_tries_init; 267e117be74SRussell King unsigned char sm_mod_tries; 26873970055SRussell King unsigned char sm_dev_state; 26973970055SRussell King unsigned short sm_state; 270281e4eabSRussell King unsigned char sm_fault_retries; 2711cb89a14SRussell King unsigned char sm_phy_retries; 27273970055SRussell King 27373970055SRussell King struct sfp_eeprom_id id; 274ed32abb1SRussell King unsigned int module_power_mW; 27526c97a2dSRussell King unsigned int module_t_start_up; 276324e88cbSMarek Behún unsigned int module_t_wait; 277f94b9bedSRussell King (Oracle) 278fc082b39SRussell King (Oracle) unsigned int rate_kbd; 279fc082b39SRussell King (Oracle) unsigned int rs_threshold_kbd; 280fc082b39SRussell King (Oracle) unsigned int rs_state_mask; 281fc082b39SRussell King (Oracle) 282f94b9bedSRussell King (Oracle) bool have_a2; 2832069624dSMatthew Hagan bool tx_fault_ignore; 284ed32abb1SRussell King 28523571c7bSRussell King (Oracle) const struct sfp_quirk *quirk; 28623571c7bSRussell King (Oracle) 2871323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2881323061aSAndrew Lunn struct sfp_diag diag; 289139d3a21SRussell King struct delayed_work hwmon_probe; 290139d3a21SRussell King unsigned int hwmon_tries; 2911323061aSAndrew Lunn struct device *hwmon_dev; 2921323061aSAndrew Lunn char *hwmon_name; 2931323061aSAndrew Lunn #endif 2941323061aSAndrew Lunn 2959cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2969cc8976cSRussell King struct dentry *debugfs_dir; 2979cc8976cSRussell King #endif 29873970055SRussell King }; 29973970055SRussell King 300259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 301259c8618SRussell King { 3020fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 303259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 304259c8618SRussell King } 305259c8618SRussell King 306259c8618SRussell King static const struct sff_data sff_data = { 307259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 308259c8618SRussell King .module_supported = sff_module_supported, 309259c8618SRussell King }; 310259c8618SRussell King 311259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 312259c8618SRussell King { 313f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 314f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 315f0b4f847SPali Rohár return true; 316f0b4f847SPali Rohár 317f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 318f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 319f0b4f847SPali Rohár * as supported based on vendor name and pn match. 320f0b4f847SPali Rohár */ 321f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 322f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 323f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 324f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 325f0b4f847SPali Rohár return true; 326f0b4f847SPali Rohár 327f0b4f847SPali Rohár return false; 328259c8618SRussell King } 329259c8618SRussell King 330259c8618SRussell King static const struct sff_data sfp_data = { 331259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 332fc082b39SRussell King (Oracle) SFP_F_TX_DISABLE | SFP_F_RS0 | SFP_F_RS1, 333259c8618SRussell King .module_supported = sfp_module_supported, 334259c8618SRussell King }; 335259c8618SRussell King 336259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 337259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 338259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 339259c8618SRussell King { }, 340259c8618SRussell King }; 341259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 342259c8618SRussell King 34327541675SRussell King (Oracle) static void sfp_fixup_long_startup(struct sfp *sfp) 34427541675SRussell King (Oracle) { 34527541675SRussell King (Oracle) sfp->module_t_start_up = T_START_UP_BAD_GPON; 34627541675SRussell King (Oracle) } 34727541675SRussell King (Oracle) 3485029be76SRussell King (Oracle) static void sfp_fixup_ignore_tx_fault(struct sfp *sfp) 3495029be76SRussell King (Oracle) { 3505029be76SRussell King (Oracle) sfp->tx_fault_ignore = true; 3515029be76SRussell King (Oracle) } 3525029be76SRussell King (Oracle) 3535859a99bSRussell King (Oracle) // For 10GBASE-T short-reach modules 3545859a99bSRussell King (Oracle) static void sfp_fixup_10gbaset_30m(struct sfp *sfp) 3555859a99bSRussell King (Oracle) { 3565859a99bSRussell King (Oracle) sfp->id.base.connector = SFF8024_CONNECTOR_RJ45; 3575859a99bSRussell King (Oracle) sfp->id.base.extended_cc = SFF8024_ECC_10GBASE_T_SR; 3585859a99bSRussell King (Oracle) } 3595859a99bSRussell King (Oracle) 3605859a99bSRussell King (Oracle) static void sfp_fixup_rollball_proto(struct sfp *sfp, unsigned int secs) 3615859a99bSRussell King (Oracle) { 3625859a99bSRussell King (Oracle) sfp->mdio_protocol = MDIO_I2C_ROLLBALL; 3635859a99bSRussell King (Oracle) sfp->module_t_wait = msecs_to_jiffies(secs * 1000); 3645859a99bSRussell King (Oracle) } 3655859a99bSRussell King (Oracle) 3665859a99bSRussell King (Oracle) static void sfp_fixup_fs_10gt(struct sfp *sfp) 3675859a99bSRussell King (Oracle) { 3685859a99bSRussell King (Oracle) sfp_fixup_10gbaset_30m(sfp); 3695859a99bSRussell King (Oracle) 3705859a99bSRussell King (Oracle) // These SFPs need 4 seconds before the PHY can be accessed 3715859a99bSRussell King (Oracle) sfp_fixup_rollball_proto(sfp, 4); 3725859a99bSRussell King (Oracle) } 3735859a99bSRussell King (Oracle) 37473472c83SRussell King (Oracle) static void sfp_fixup_halny_gsfp(struct sfp *sfp) 37573472c83SRussell King (Oracle) { 37673472c83SRussell King (Oracle) /* Ignore the TX_FAULT and LOS signals on this module. 37773472c83SRussell King (Oracle) * these are possibly used for other purposes on this 37873472c83SRussell King (Oracle) * module, e.g. a serial port. 37973472c83SRussell King (Oracle) */ 38073472c83SRussell King (Oracle) sfp->state_hw_mask &= ~(SFP_F_TX_FAULT | SFP_F_LOS); 38173472c83SRussell King (Oracle) } 38273472c83SRussell King (Oracle) 383324e88cbSMarek Behún static void sfp_fixup_rollball(struct sfp *sfp) 384324e88cbSMarek Behún { 3855859a99bSRussell King (Oracle) // Rollball SFPs need 25 seconds before the PHY can be accessed 3865859a99bSRussell King (Oracle) sfp_fixup_rollball_proto(sfp, 25); 387324e88cbSMarek Behún } 388324e88cbSMarek Behún 389324e88cbSMarek Behún static void sfp_fixup_rollball_cc(struct sfp *sfp) 390324e88cbSMarek Behún { 391324e88cbSMarek Behún sfp_fixup_rollball(sfp); 392324e88cbSMarek Behún 393324e88cbSMarek Behún /* Some RollBall SFPs may have wrong (zero) extended compliance code 394324e88cbSMarek Behún * burned in EEPROM. For PHY probing we need the correct one. 395324e88cbSMarek Behún */ 396324e88cbSMarek Behún sfp->id.base.extended_cc = SFF8024_ECC_10GBASE_T_SFI; 397324e88cbSMarek Behún } 398324e88cbSMarek Behún 39923571c7bSRussell King (Oracle) static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id, 400fd580c98SRussell King unsigned long *modes, 401fd580c98SRussell King unsigned long *interfaces) 40223571c7bSRussell King (Oracle) { 40323571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, modes); 404fd580c98SRussell King __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 40523571c7bSRussell King (Oracle) } 40623571c7bSRussell King (Oracle) 40750e96acbSRussell King (Oracle) static void sfp_quirk_disable_autoneg(const struct sfp_eeprom_id *id, 40850e96acbSRussell King (Oracle) unsigned long *modes, 40950e96acbSRussell King (Oracle) unsigned long *interfaces) 41050e96acbSRussell King (Oracle) { 41150e96acbSRussell King (Oracle) linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, modes); 41250e96acbSRussell King (Oracle) } 41350e96acbSRussell King (Oracle) 41450e96acbSRussell King (Oracle) static void sfp_quirk_oem_2_5g(const struct sfp_eeprom_id *id, 41550e96acbSRussell King (Oracle) unsigned long *modes, 41650e96acbSRussell King (Oracle) unsigned long *interfaces) 41750e96acbSRussell King (Oracle) { 41850e96acbSRussell King (Oracle) /* Copper 2.5G SFP */ 41950e96acbSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, modes); 42050e96acbSRussell King (Oracle) __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 42150e96acbSRussell King (Oracle) sfp_quirk_disable_autoneg(id, modes, interfaces); 42250e96acbSRussell King (Oracle) } 42350e96acbSRussell King (Oracle) 42423571c7bSRussell King (Oracle) static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id, 425fd580c98SRussell King unsigned long *modes, 426fd580c98SRussell King unsigned long *interfaces) 42723571c7bSRussell King (Oracle) { 42823571c7bSRussell King (Oracle) /* Ubiquiti U-Fiber Instant module claims that support all transceiver 42923571c7bSRussell King (Oracle) * types including 10G Ethernet which is not truth. So clear all claimed 43023571c7bSRussell King (Oracle) * modes and set only one mode which module supports: 1000baseX_Full. 43123571c7bSRussell King (Oracle) */ 43223571c7bSRussell King (Oracle) linkmode_zero(modes); 43323571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, modes); 43423571c7bSRussell King (Oracle) } 43523571c7bSRussell King (Oracle) 43613c8adcfSMarek Behún #define SFP_QUIRK(_v, _p, _m, _f) \ 43713c8adcfSMarek Behún { .vendor = _v, .part = _p, .modes = _m, .fixup = _f, } 43813c8adcfSMarek Behún #define SFP_QUIRK_M(_v, _p, _m) SFP_QUIRK(_v, _p, _m, NULL) 43913c8adcfSMarek Behún #define SFP_QUIRK_F(_v, _p, _f) SFP_QUIRK(_v, _p, NULL, _f) 44013c8adcfSMarek Behún 44123571c7bSRussell King (Oracle) static const struct sfp_quirk sfp_quirks[] = { 44213c8adcfSMarek Behún // Alcatel Lucent G-010S-P can operate at 2500base-X, but incorrectly 44313c8adcfSMarek Behún // report 2500MBd NRZ in their EEPROM 44413c8adcfSMarek Behún SFP_QUIRK_M("ALCATELLUCENT", "G010SP", sfp_quirk_2500basex), 44513c8adcfSMarek Behún 44613c8adcfSMarek Behún // Alcatel Lucent G-010S-A can operate at 2500base-X, but report 3.2GBd 44723571c7bSRussell King (Oracle) // NRZ in their EEPROM 44813c8adcfSMarek Behún SFP_QUIRK("ALCATELLUCENT", "3FE46541AA", sfp_quirk_2500basex, 44913c8adcfSMarek Behún sfp_fixup_long_startup), 45013c8adcfSMarek Behún 4515859a99bSRussell King (Oracle) // Fiberstore SFP-10G-T doesn't identify as copper, and uses the 4525859a99bSRussell King (Oracle) // Rollball protocol to talk to the PHY. 4535859a99bSRussell King (Oracle) SFP_QUIRK_F("FS", "SFP-10G-T", sfp_fixup_fs_10gt), 4545859a99bSRussell King (Oracle) 45513c8adcfSMarek Behún SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp), 45613c8adcfSMarek Behún 457ad651d68SDaniel Golle // HG MXPD-483II-F 2.5G supports 2500Base-X, but incorrectly reports 458ad651d68SDaniel Golle // 2600MBd in their EERPOM 459ad651d68SDaniel Golle SFP_QUIRK_M("HG GENUINE", "MXPD-483II", sfp_quirk_2500basex), 460ad651d68SDaniel Golle 46113c8adcfSMarek Behún // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in 46213c8adcfSMarek Behún // their EEPROM 46313c8adcfSMarek Behún SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex, 46413c8adcfSMarek Behún sfp_fixup_ignore_tx_fault), 46513c8adcfSMarek Behún 46613c8adcfSMarek Behún // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report 46713c8adcfSMarek Behún // 2500MBd NRZ in their EEPROM 46813c8adcfSMarek Behún SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex), 46913c8adcfSMarek Behún 47013c8adcfSMarek Behún SFP_QUIRK_M("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant), 471324e88cbSMarek Behún 472ac2e8e3cSJosua Mayer // Walsun HXSX-ATR[CI]-1 don't identify as copper, and use the 4735859a99bSRussell King (Oracle) // Rollball protocol to talk to the PHY. 4745859a99bSRussell King (Oracle) SFP_QUIRK_F("Walsun", "HXSX-ATRC-1", sfp_fixup_fs_10gt), 475ac2e8e3cSJosua Mayer SFP_QUIRK_F("Walsun", "HXSX-ATRI-1", sfp_fixup_fs_10gt), 4765859a99bSRussell King (Oracle) 477324e88cbSMarek Behún SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc), 47850e96acbSRussell King (Oracle) SFP_QUIRK_M("OEM", "SFP-2.5G-T", sfp_quirk_oem_2_5g), 479324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc), 480324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc), 481324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), 482324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), 48323571c7bSRussell King (Oracle) }; 48423571c7bSRussell King (Oracle) 48523571c7bSRussell King (Oracle) static size_t sfp_strlen(const char *str, size_t maxlen) 48623571c7bSRussell King (Oracle) { 48723571c7bSRussell King (Oracle) size_t size, i; 48823571c7bSRussell King (Oracle) 48973472c83SRussell King (Oracle) /* Trailing characters should be filled with space chars, but 49073472c83SRussell King (Oracle) * some manufacturers can't read SFF-8472 and use NUL. 49173472c83SRussell King (Oracle) */ 49223571c7bSRussell King (Oracle) for (i = 0, size = 0; i < maxlen; i++) 49373472c83SRussell King (Oracle) if (str[i] != ' ' && str[i] != '\0') 49423571c7bSRussell King (Oracle) size = i + 1; 49523571c7bSRussell King (Oracle) 49623571c7bSRussell King (Oracle) return size; 49723571c7bSRussell King (Oracle) } 49823571c7bSRussell King (Oracle) 49923571c7bSRussell King (Oracle) static bool sfp_match(const char *qs, const char *str, size_t len) 50023571c7bSRussell King (Oracle) { 50123571c7bSRussell King (Oracle) if (!qs) 50223571c7bSRussell King (Oracle) return true; 50323571c7bSRussell King (Oracle) if (strlen(qs) != len) 50423571c7bSRussell King (Oracle) return false; 50523571c7bSRussell King (Oracle) return !strncmp(qs, str, len); 50623571c7bSRussell King (Oracle) } 50723571c7bSRussell King (Oracle) 50823571c7bSRussell King (Oracle) static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) 50923571c7bSRussell King (Oracle) { 51023571c7bSRussell King (Oracle) const struct sfp_quirk *q; 51123571c7bSRussell King (Oracle) unsigned int i; 51223571c7bSRussell King (Oracle) size_t vs, ps; 51323571c7bSRussell King (Oracle) 51423571c7bSRussell King (Oracle) vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); 51523571c7bSRussell King (Oracle) ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); 51623571c7bSRussell King (Oracle) 51723571c7bSRussell King (Oracle) for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) 51823571c7bSRussell King (Oracle) if (sfp_match(q->vendor, id->base.vendor_name, vs) && 51923571c7bSRussell King (Oracle) sfp_match(q->part, id->base.vendor_pn, ps)) 52023571c7bSRussell King (Oracle) return q; 52123571c7bSRussell King (Oracle) 52223571c7bSRussell King (Oracle) return NULL; 52323571c7bSRussell King (Oracle) } 52423571c7bSRussell King (Oracle) 52573970055SRussell King static unsigned long poll_jiffies; 52673970055SRussell King 52773970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 52873970055SRussell King { 52973970055SRussell King unsigned int i, state, v; 53073970055SRussell King 53173970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 53273970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 53373970055SRussell King continue; 53473970055SRussell King 53573970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 53673970055SRussell King if (v) 53773970055SRussell King state |= BIT(i); 53873970055SRussell King } 53973970055SRussell King 54073970055SRussell King return state; 54173970055SRussell King } 54273970055SRussell King 543259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 544259c8618SRussell King { 545259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 546259c8618SRussell King } 547259c8618SRussell King 54873970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 54973970055SRussell King { 550fc082b39SRussell King (Oracle) unsigned int drive; 551fc082b39SRussell King (Oracle) 552fc082b39SRussell King (Oracle) if (state & SFP_F_PRESENT) 553fc082b39SRussell King (Oracle) /* If the module is present, drive the requested signals */ 554fc082b39SRussell King (Oracle) drive = sfp->state_hw_drive; 555fc082b39SRussell King (Oracle) else 556fc082b39SRussell King (Oracle) /* Otherwise, let them float to the pull-ups */ 557fc082b39SRussell King (Oracle) drive = 0; 558fc082b39SRussell King (Oracle) 559fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) { 560fc082b39SRussell King (Oracle) if (drive & SFP_F_TX_DISABLE) 56173970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 56273970055SRussell King state & SFP_F_TX_DISABLE); 563fc082b39SRussell King (Oracle) else 56473970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 565fc082b39SRussell King (Oracle) } 566fc082b39SRussell King (Oracle) 567fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0]) { 568fc082b39SRussell King (Oracle) if (drive & SFP_F_RS0) 569fc082b39SRussell King (Oracle) gpiod_direction_output(sfp->gpio[GPIO_RS0], 570fc082b39SRussell King (Oracle) state & SFP_F_RS0); 571fc082b39SRussell King (Oracle) else 572fc082b39SRussell King (Oracle) gpiod_direction_input(sfp->gpio[GPIO_RS0]); 573fc082b39SRussell King (Oracle) } 574fc082b39SRussell King (Oracle) 575fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS1]) { 576fc082b39SRussell King (Oracle) if (drive & SFP_F_RS1) 577fc082b39SRussell King (Oracle) gpiod_direction_output(sfp->gpio[GPIO_RS1], 578fc082b39SRussell King (Oracle) state & SFP_F_RS1); 579fc082b39SRussell King (Oracle) else 580fc082b39SRussell King (Oracle) gpiod_direction_input(sfp->gpio[GPIO_RS1]); 58173970055SRussell King } 58273970055SRussell King } 58373970055SRussell King 5843bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 5853bb35261SJon Nettleton size_t len) 58673970055SRussell King { 58773970055SRussell King struct i2c_msg msgs[2]; 588426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 589426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 59028e74a7cSRussell King size_t this_len; 59173970055SRussell King int ret; 59273970055SRussell King 59373970055SRussell King msgs[0].addr = bus_addr; 59473970055SRussell King msgs[0].flags = 0; 59573970055SRussell King msgs[0].len = 1; 59673970055SRussell King msgs[0].buf = &dev_addr; 59773970055SRussell King msgs[1].addr = bus_addr; 59873970055SRussell King msgs[1].flags = I2C_M_RD; 59973970055SRussell King msgs[1].len = len; 60073970055SRussell King msgs[1].buf = buf; 60173970055SRussell King 60228e74a7cSRussell King while (len) { 60328e74a7cSRussell King this_len = len; 6040d035bedSRussell King if (this_len > block_size) 6050d035bedSRussell King this_len = block_size; 60628e74a7cSRussell King 60728e74a7cSRussell King msgs[1].len = this_len; 60828e74a7cSRussell King 6093bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 61073970055SRussell King if (ret < 0) 61173970055SRussell King return ret; 61273970055SRussell King 61328e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 61428e74a7cSRussell King break; 61528e74a7cSRussell King 61628e74a7cSRussell King msgs[1].buf += this_len; 61728e74a7cSRussell King dev_addr += this_len; 61828e74a7cSRussell King len -= this_len; 61928e74a7cSRussell King } 62028e74a7cSRussell King 62128e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 62273970055SRussell King } 62373970055SRussell King 6243bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 62573970055SRussell King size_t len) 62673970055SRussell King { 6273bb35261SJon Nettleton struct i2c_msg msgs[1]; 6283bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 6293bb35261SJon Nettleton int ret; 6303bb35261SJon Nettleton 6313bb35261SJon Nettleton msgs[0].addr = bus_addr; 6323bb35261SJon Nettleton msgs[0].flags = 0; 6333bb35261SJon Nettleton msgs[0].len = 1 + len; 6343bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 6353bb35261SJon Nettleton if (!msgs[0].buf) 6363bb35261SJon Nettleton return -ENOMEM; 6373bb35261SJon Nettleton 6383bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 6393bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 6403bb35261SJon Nettleton 6413bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 6423bb35261SJon Nettleton 6433bb35261SJon Nettleton kfree(msgs[0].buf); 6443bb35261SJon Nettleton 6453bb35261SJon Nettleton if (ret < 0) 6463bb35261SJon Nettleton return ret; 6473bb35261SJon Nettleton 6483bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 64973970055SRussell King } 65073970055SRussell King 65173970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 65273970055SRussell King { 65373970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 65473970055SRussell King return -EINVAL; 65573970055SRussell King 65673970055SRussell King sfp->i2c = i2c; 65773970055SRussell King sfp->read = sfp_i2c_read; 6583bb35261SJon Nettleton sfp->write = sfp_i2c_write; 65973970055SRussell King 660e85b1347SMarek Behún return 0; 661e85b1347SMarek Behún } 662e85b1347SMarek Behún 663e85b1347SMarek Behún static int sfp_i2c_mdiobus_create(struct sfp *sfp) 664e85b1347SMarek Behún { 665e85b1347SMarek Behún struct mii_bus *i2c_mii; 666e85b1347SMarek Behún int ret; 667e85b1347SMarek Behún 66809bbedacSMarek Behún i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, sfp->mdio_protocol); 66973970055SRussell King if (IS_ERR(i2c_mii)) 67073970055SRussell King return PTR_ERR(i2c_mii); 67173970055SRussell King 67273970055SRussell King i2c_mii->name = "SFP I2C Bus"; 67373970055SRussell King i2c_mii->phy_mask = ~0; 67473970055SRussell King 67573970055SRussell King ret = mdiobus_register(i2c_mii); 67673970055SRussell King if (ret < 0) { 67773970055SRussell King mdiobus_free(i2c_mii); 67873970055SRussell King return ret; 67973970055SRussell King } 68073970055SRussell King 68173970055SRussell King sfp->i2c_mii = i2c_mii; 68273970055SRussell King 68373970055SRussell King return 0; 68473970055SRussell King } 68573970055SRussell King 686e85b1347SMarek Behún static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) 687e85b1347SMarek Behún { 688e85b1347SMarek Behún mdiobus_unregister(sfp->i2c_mii); 689e85b1347SMarek Behún sfp->i2c_mii = NULL; 690e85b1347SMarek Behún } 691e85b1347SMarek Behún 69273970055SRussell King /* Interface */ 69373970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 69473970055SRussell King { 69573970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 69673970055SRussell King } 69773970055SRussell King 6983bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 6993bb35261SJon Nettleton { 7003bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 7013bb35261SJon Nettleton } 7023bb35261SJon Nettleton 703a3c536fcSRussell King (Oracle) static int sfp_modify_u8(struct sfp *sfp, bool a2, u8 addr, u8 mask, u8 val) 704a3c536fcSRussell King (Oracle) { 705a3c536fcSRussell King (Oracle) int ret; 706a3c536fcSRussell King (Oracle) u8 old, v; 707a3c536fcSRussell King (Oracle) 708a3c536fcSRussell King (Oracle) ret = sfp_read(sfp, a2, addr, &old, sizeof(old)); 709a3c536fcSRussell King (Oracle) if (ret != sizeof(old)) 710a3c536fcSRussell King (Oracle) return ret; 711a3c536fcSRussell King (Oracle) 712a3c536fcSRussell King (Oracle) v = (old & ~mask) | (val & mask); 713a3c536fcSRussell King (Oracle) if (v == old) 714a3c536fcSRussell King (Oracle) return sizeof(v); 715a3c536fcSRussell King (Oracle) 716a3c536fcSRussell King (Oracle) return sfp_write(sfp, a2, addr, &v, sizeof(v)); 717a3c536fcSRussell King (Oracle) } 718a3c536fcSRussell King (Oracle) 719f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 720f3c9a666SRussell King { 721f3c9a666SRussell King unsigned int state = 0; 722f3c9a666SRussell King u8 status; 7230dea4d03SRussell King int ret; 724f3c9a666SRussell King 7250dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 7260dea4d03SRussell King if (ret == sizeof(status)) { 727f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 728f3c9a666SRussell King state |= SFP_F_LOS; 729f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 730f3c9a666SRussell King state |= SFP_F_TX_FAULT; 7310dea4d03SRussell King } else { 7320dea4d03SRussell King dev_err_ratelimited(sfp->dev, 7339ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 7349ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 7350dea4d03SRussell King /* Preserve the current state */ 7360dea4d03SRussell King state = sfp->state; 737f3c9a666SRussell King } 738f3c9a666SRussell King 739f3c9a666SRussell King return state & sfp->state_soft_mask; 740f3c9a666SRussell King } 741f3c9a666SRussell King 742fc082b39SRussell King (Oracle) static void sfp_soft_set_state(struct sfp *sfp, unsigned int state, 743fc082b39SRussell King (Oracle) unsigned int soft) 744f3c9a666SRussell King { 745fc082b39SRussell King (Oracle) u8 mask = 0; 746a3c536fcSRussell King (Oracle) u8 val = 0; 747f3c9a666SRussell King 748fc082b39SRussell King (Oracle) if (soft & SFP_F_TX_DISABLE) 749fc082b39SRussell King (Oracle) mask |= SFP_STATUS_TX_DISABLE_FORCE; 750f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 751a3c536fcSRussell King (Oracle) val |= SFP_STATUS_TX_DISABLE_FORCE; 752f3c9a666SRussell King 753fc082b39SRussell King (Oracle) if (soft & SFP_F_RS0) 754fc082b39SRussell King (Oracle) mask |= SFP_STATUS_RS0_SELECT; 755fc082b39SRussell King (Oracle) if (state & SFP_F_RS0) 756fc082b39SRussell King (Oracle) val |= SFP_STATUS_RS0_SELECT; 757a3c536fcSRussell King (Oracle) 758fc082b39SRussell King (Oracle) if (mask) 759a3c536fcSRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); 760fc082b39SRussell King (Oracle) 761fc082b39SRussell King (Oracle) val = mask = 0; 762fc082b39SRussell King (Oracle) if (soft & SFP_F_RS1) 763fc082b39SRussell King (Oracle) mask |= SFP_EXT_STATUS_RS1_SELECT; 764fc082b39SRussell King (Oracle) if (state & SFP_F_RS1) 765fc082b39SRussell King (Oracle) val |= SFP_EXT_STATUS_RS1_SELECT; 766fc082b39SRussell King (Oracle) 767fc082b39SRussell King (Oracle) if (mask) 768fc082b39SRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_EXT_STATUS, mask, val); 769f3c9a666SRussell King } 770f3c9a666SRussell King 771f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 772f3c9a666SRussell King { 773f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 7748475c4b7SRussell King (Oracle) unsigned int mask = 0; 775f3c9a666SRussell King 7768475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 7778475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 7788475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 7798475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 7808475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 7818475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 782fc082b39SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RATE_SELECT) 783fc082b39SRussell King (Oracle) mask |= sfp->rs_state_mask; 7848475c4b7SRussell King (Oracle) 7851974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 7868475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 7878475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 788f3c9a666SRussell King 789f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 790f3c9a666SRussell King !sfp->need_poll) 791f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 7921974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 793f3c9a666SRussell King } 794f3c9a666SRussell King 795f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 796f3c9a666SRussell King { 7971974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 798f3c9a666SRussell King sfp->state_soft_mask = 0; 7991974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 800f3c9a666SRussell King } 801f3c9a666SRussell King 8021974fd3bSRussell King (Oracle) /* sfp_get_state() - must be called with st_mutex held, or in the 8031974fd3bSRussell King (Oracle) * initialisation path. 8041974fd3bSRussell King (Oracle) */ 805f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 806f3c9a666SRussell King { 8078475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 8088475c4b7SRussell King (Oracle) unsigned int state; 809f3c9a666SRussell King 8108475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 8118475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 812f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 813f3c9a666SRussell King 814f3c9a666SRussell King return state; 815f3c9a666SRussell King } 816f3c9a666SRussell King 8171974fd3bSRussell King (Oracle) /* sfp_set_state() - must be called with st_mutex held, or in the 8181974fd3bSRussell King (Oracle) * initialisation path. 8191974fd3bSRussell King (Oracle) */ 820f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 821f3c9a666SRussell King { 822fc082b39SRussell King (Oracle) unsigned int soft; 823fc082b39SRussell King (Oracle) 824f3c9a666SRussell King sfp->set_state(sfp, state); 825f3c9a666SRussell King 826fc082b39SRussell King (Oracle) soft = sfp->state_soft_mask & SFP_F_OUTPUTS; 827fc082b39SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 828fc082b39SRussell King (Oracle) sfp_soft_set_state(sfp, state, soft); 829f3c9a666SRussell King } 830f3c9a666SRussell King 831418c1214SRussell King (Oracle) static void sfp_mod_state(struct sfp *sfp, unsigned int mask, unsigned int set) 832418c1214SRussell King (Oracle) { 8331974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 834418c1214SRussell King (Oracle) sfp->state = (sfp->state & ~mask) | set; 835418c1214SRussell King (Oracle) sfp_set_state(sfp, sfp->state); 8361974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 837418c1214SRussell King (Oracle) } 838418c1214SRussell King (Oracle) 83973970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 84073970055SRussell King { 84173970055SRussell King u8 *p, check; 84273970055SRussell King 84373970055SRussell King for (p = buf, check = 0; len; p++, len--) 84473970055SRussell King check += *p; 84573970055SRussell King 84673970055SRussell King return check; 84773970055SRussell King } 84873970055SRussell King 8491323061aSAndrew Lunn /* hwmon */ 8501323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 8511323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 8521323061aSAndrew Lunn enum hwmon_sensor_types type, 8531323061aSAndrew Lunn u32 attr, int channel) 8541323061aSAndrew Lunn { 8551323061aSAndrew Lunn const struct sfp *sfp = data; 8561323061aSAndrew Lunn 8571323061aSAndrew Lunn switch (type) { 8581323061aSAndrew Lunn case hwmon_temp: 8591323061aSAndrew Lunn switch (attr) { 8601323061aSAndrew Lunn case hwmon_temp_min_alarm: 8611323061aSAndrew Lunn case hwmon_temp_max_alarm: 8621323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 8631323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8641323061aSAndrew Lunn case hwmon_temp_min: 8651323061aSAndrew Lunn case hwmon_temp_max: 8661323061aSAndrew Lunn case hwmon_temp_lcrit: 8671323061aSAndrew Lunn case hwmon_temp_crit: 868a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 869a33710bdSAndrew Lunn return 0; 870df561f66SGustavo A. R. Silva fallthrough; 871a33710bdSAndrew Lunn case hwmon_temp_input: 872c1236979SAndrew Lunn case hwmon_temp_label: 8731323061aSAndrew Lunn return 0444; 8741323061aSAndrew Lunn default: 8751323061aSAndrew Lunn return 0; 8761323061aSAndrew Lunn } 8771323061aSAndrew Lunn case hwmon_in: 8781323061aSAndrew Lunn switch (attr) { 8791323061aSAndrew Lunn case hwmon_in_min_alarm: 8801323061aSAndrew Lunn case hwmon_in_max_alarm: 8811323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8821323061aSAndrew Lunn case hwmon_in_crit_alarm: 8831323061aSAndrew Lunn case hwmon_in_min: 8841323061aSAndrew Lunn case hwmon_in_max: 8851323061aSAndrew Lunn case hwmon_in_lcrit: 8861323061aSAndrew Lunn case hwmon_in_crit: 887a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 888a33710bdSAndrew Lunn return 0; 889df561f66SGustavo A. R. Silva fallthrough; 890a33710bdSAndrew Lunn case hwmon_in_input: 891c1236979SAndrew Lunn case hwmon_in_label: 8921323061aSAndrew Lunn return 0444; 8931323061aSAndrew Lunn default: 8941323061aSAndrew Lunn return 0; 8951323061aSAndrew Lunn } 8961323061aSAndrew Lunn case hwmon_curr: 8971323061aSAndrew Lunn switch (attr) { 8981323061aSAndrew Lunn case hwmon_curr_min_alarm: 8991323061aSAndrew Lunn case hwmon_curr_max_alarm: 9001323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9011323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9021323061aSAndrew Lunn case hwmon_curr_min: 9031323061aSAndrew Lunn case hwmon_curr_max: 9041323061aSAndrew Lunn case hwmon_curr_lcrit: 9051323061aSAndrew Lunn case hwmon_curr_crit: 906a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 907a33710bdSAndrew Lunn return 0; 908df561f66SGustavo A. R. Silva fallthrough; 909a33710bdSAndrew Lunn case hwmon_curr_input: 910c1236979SAndrew Lunn case hwmon_curr_label: 9111323061aSAndrew Lunn return 0444; 9121323061aSAndrew Lunn default: 9131323061aSAndrew Lunn return 0; 9141323061aSAndrew Lunn } 9151323061aSAndrew Lunn case hwmon_power: 9161323061aSAndrew Lunn /* External calibration of receive power requires 9171323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 9181323061aSAndrew Lunn * is not easy, so just skip it. If the module does 9191323061aSAndrew Lunn * not require external calibration, we can however 9201323061aSAndrew Lunn * show receiver power, since FP is then not needed. 9211323061aSAndrew Lunn */ 9221323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 9231323061aSAndrew Lunn channel == 1) 9241323061aSAndrew Lunn return 0; 9251323061aSAndrew Lunn switch (attr) { 9261323061aSAndrew Lunn case hwmon_power_min_alarm: 9271323061aSAndrew Lunn case hwmon_power_max_alarm: 9281323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9291323061aSAndrew Lunn case hwmon_power_crit_alarm: 9301323061aSAndrew Lunn case hwmon_power_min: 9311323061aSAndrew Lunn case hwmon_power_max: 9321323061aSAndrew Lunn case hwmon_power_lcrit: 9331323061aSAndrew Lunn case hwmon_power_crit: 934a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 935a33710bdSAndrew Lunn return 0; 936df561f66SGustavo A. R. Silva fallthrough; 937a33710bdSAndrew Lunn case hwmon_power_input: 938c1236979SAndrew Lunn case hwmon_power_label: 9391323061aSAndrew Lunn return 0444; 9401323061aSAndrew Lunn default: 9411323061aSAndrew Lunn return 0; 9421323061aSAndrew Lunn } 9431323061aSAndrew Lunn default: 9441323061aSAndrew Lunn return 0; 9451323061aSAndrew Lunn } 9461323061aSAndrew Lunn } 9471323061aSAndrew Lunn 9481323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 9491323061aSAndrew Lunn { 9501323061aSAndrew Lunn __be16 val; 9511323061aSAndrew Lunn int err; 9521323061aSAndrew Lunn 9531323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 9541323061aSAndrew Lunn if (err < 0) 9551323061aSAndrew Lunn return err; 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn *value = be16_to_cpu(val); 9581323061aSAndrew Lunn 9591323061aSAndrew Lunn return 0; 9601323061aSAndrew Lunn } 9611323061aSAndrew Lunn 9621323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 9631323061aSAndrew Lunn { 9640cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9651323061aSAndrew Lunn } 9661323061aSAndrew Lunn 9671323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 9681323061aSAndrew Lunn long *value) 9691323061aSAndrew Lunn { 9701323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 9711323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 9721323061aSAndrew Lunn } 9731323061aSAndrew Lunn 9741323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 9751323061aSAndrew Lunn { 9761323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 9771323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 9781323061aSAndrew Lunn 9791323061aSAndrew Lunn if (*value >= 0x8000) 9801323061aSAndrew Lunn *value -= 0x10000; 9811323061aSAndrew Lunn 9821323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 9831323061aSAndrew Lunn } 9841323061aSAndrew Lunn 9851323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 9861323061aSAndrew Lunn { 9871323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 9881323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 9891323061aSAndrew Lunn 9901323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9911323061aSAndrew Lunn } 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 9941323061aSAndrew Lunn { 9951323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 9961323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 9971323061aSAndrew Lunn 9981323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 9991323061aSAndrew Lunn } 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 10021323061aSAndrew Lunn { 10031323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 10041323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 10051323061aSAndrew Lunn 10061323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 10071323061aSAndrew Lunn } 10081323061aSAndrew Lunn 10091323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 10101323061aSAndrew Lunn { 10111323061aSAndrew Lunn int err; 10121323061aSAndrew Lunn 10131323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10141323061aSAndrew Lunn if (err < 0) 10151323061aSAndrew Lunn return err; 10161323061aSAndrew Lunn 10171323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn return 0; 10201323061aSAndrew Lunn } 10211323061aSAndrew Lunn 10221323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 10231323061aSAndrew Lunn { 10241323061aSAndrew Lunn int err; 10251323061aSAndrew Lunn 10261323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10271323061aSAndrew Lunn if (err < 0) 10281323061aSAndrew Lunn return err; 10291323061aSAndrew Lunn 10301323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10311323061aSAndrew Lunn 10321323061aSAndrew Lunn return 0; 10331323061aSAndrew Lunn } 10341323061aSAndrew Lunn 10351323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 10361323061aSAndrew Lunn { 10371323061aSAndrew Lunn int err; 10381323061aSAndrew Lunn 10391323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10401323061aSAndrew Lunn if (err < 0) 10411323061aSAndrew Lunn return err; 10421323061aSAndrew Lunn 10431323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10441323061aSAndrew Lunn 10451323061aSAndrew Lunn return 0; 10461323061aSAndrew Lunn } 10471323061aSAndrew Lunn 10481323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 10491323061aSAndrew Lunn { 10501323061aSAndrew Lunn int err; 10511323061aSAndrew Lunn 10521323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10531323061aSAndrew Lunn if (err < 0) 10541323061aSAndrew Lunn return err; 10551323061aSAndrew Lunn 10561323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10571323061aSAndrew Lunn 10581323061aSAndrew Lunn return 0; 10591323061aSAndrew Lunn } 10601323061aSAndrew Lunn 10611323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 10621323061aSAndrew Lunn { 10631323061aSAndrew Lunn int err; 10641323061aSAndrew Lunn 10651323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10661323061aSAndrew Lunn if (err < 0) 10671323061aSAndrew Lunn return err; 10681323061aSAndrew Lunn 10691323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10701323061aSAndrew Lunn 10711323061aSAndrew Lunn return 0; 10721323061aSAndrew Lunn } 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 10751323061aSAndrew Lunn { 10761323061aSAndrew Lunn u8 status; 10771323061aSAndrew Lunn int err; 10781323061aSAndrew Lunn 10791323061aSAndrew Lunn switch (attr) { 10801323061aSAndrew Lunn case hwmon_temp_input: 10811323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 10821323061aSAndrew Lunn 10831323061aSAndrew Lunn case hwmon_temp_lcrit: 10841323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 10851323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10861323061aSAndrew Lunn return 0; 10871323061aSAndrew Lunn 10881323061aSAndrew Lunn case hwmon_temp_min: 10891323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 10901323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10911323061aSAndrew Lunn return 0; 10921323061aSAndrew Lunn case hwmon_temp_max: 10931323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 10941323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10951323061aSAndrew Lunn return 0; 10961323061aSAndrew Lunn 10971323061aSAndrew Lunn case hwmon_temp_crit: 10981323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 10991323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 11001323061aSAndrew Lunn return 0; 11011323061aSAndrew Lunn 11021323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 11031323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11041323061aSAndrew Lunn if (err < 0) 11051323061aSAndrew Lunn return err; 11061323061aSAndrew Lunn 11071323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 11081323061aSAndrew Lunn return 0; 11091323061aSAndrew Lunn 11101323061aSAndrew Lunn case hwmon_temp_min_alarm: 11111323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11121323061aSAndrew Lunn if (err < 0) 11131323061aSAndrew Lunn return err; 11141323061aSAndrew Lunn 11151323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 11161323061aSAndrew Lunn return 0; 11171323061aSAndrew Lunn 11181323061aSAndrew Lunn case hwmon_temp_max_alarm: 11191323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11201323061aSAndrew Lunn if (err < 0) 11211323061aSAndrew Lunn return err; 11221323061aSAndrew Lunn 11231323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 11241323061aSAndrew Lunn return 0; 11251323061aSAndrew Lunn 11261323061aSAndrew Lunn case hwmon_temp_crit_alarm: 11271323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11281323061aSAndrew Lunn if (err < 0) 11291323061aSAndrew Lunn return err; 11301323061aSAndrew Lunn 11311323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 11321323061aSAndrew Lunn return 0; 11331323061aSAndrew Lunn default: 11341323061aSAndrew Lunn return -EOPNOTSUPP; 11351323061aSAndrew Lunn } 11361323061aSAndrew Lunn 11371323061aSAndrew Lunn return -EOPNOTSUPP; 11381323061aSAndrew Lunn } 11391323061aSAndrew Lunn 11401323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 11411323061aSAndrew Lunn { 11421323061aSAndrew Lunn u8 status; 11431323061aSAndrew Lunn int err; 11441323061aSAndrew Lunn 11451323061aSAndrew Lunn switch (attr) { 11461323061aSAndrew Lunn case hwmon_in_input: 11471323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 11481323061aSAndrew Lunn 11491323061aSAndrew Lunn case hwmon_in_lcrit: 11501323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 11511323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11521323061aSAndrew Lunn return 0; 11531323061aSAndrew Lunn 11541323061aSAndrew Lunn case hwmon_in_min: 11551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 11561323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11571323061aSAndrew Lunn return 0; 11581323061aSAndrew Lunn 11591323061aSAndrew Lunn case hwmon_in_max: 11601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 11611323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11621323061aSAndrew Lunn return 0; 11631323061aSAndrew Lunn 11641323061aSAndrew Lunn case hwmon_in_crit: 11651323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 11661323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11671323061aSAndrew Lunn return 0; 11681323061aSAndrew Lunn 11691323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 11701323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11711323061aSAndrew Lunn if (err < 0) 11721323061aSAndrew Lunn return err; 11731323061aSAndrew Lunn 11741323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 11751323061aSAndrew Lunn return 0; 11761323061aSAndrew Lunn 11771323061aSAndrew Lunn case hwmon_in_min_alarm: 11781323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11791323061aSAndrew Lunn if (err < 0) 11801323061aSAndrew Lunn return err; 11811323061aSAndrew Lunn 11821323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 11831323061aSAndrew Lunn return 0; 11841323061aSAndrew Lunn 11851323061aSAndrew Lunn case hwmon_in_max_alarm: 11861323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11871323061aSAndrew Lunn if (err < 0) 11881323061aSAndrew Lunn return err; 11891323061aSAndrew Lunn 11901323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 11911323061aSAndrew Lunn return 0; 11921323061aSAndrew Lunn 11931323061aSAndrew Lunn case hwmon_in_crit_alarm: 11941323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11951323061aSAndrew Lunn if (err < 0) 11961323061aSAndrew Lunn return err; 11971323061aSAndrew Lunn 11981323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 11991323061aSAndrew Lunn return 0; 12001323061aSAndrew Lunn default: 12011323061aSAndrew Lunn return -EOPNOTSUPP; 12021323061aSAndrew Lunn } 12031323061aSAndrew Lunn 12041323061aSAndrew Lunn return -EOPNOTSUPP; 12051323061aSAndrew Lunn } 12061323061aSAndrew Lunn 12071323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 12081323061aSAndrew Lunn { 12091323061aSAndrew Lunn u8 status; 12101323061aSAndrew Lunn int err; 12111323061aSAndrew Lunn 12121323061aSAndrew Lunn switch (attr) { 12131323061aSAndrew Lunn case hwmon_curr_input: 12141323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 12151323061aSAndrew Lunn 12161323061aSAndrew Lunn case hwmon_curr_lcrit: 12171323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 12181323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12191323061aSAndrew Lunn return 0; 12201323061aSAndrew Lunn 12211323061aSAndrew Lunn case hwmon_curr_min: 12221323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 12231323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12241323061aSAndrew Lunn return 0; 12251323061aSAndrew Lunn 12261323061aSAndrew Lunn case hwmon_curr_max: 12271323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 12281323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12291323061aSAndrew Lunn return 0; 12301323061aSAndrew Lunn 12311323061aSAndrew Lunn case hwmon_curr_crit: 12321323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 12331323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12341323061aSAndrew Lunn return 0; 12351323061aSAndrew Lunn 12361323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 12371323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12381323061aSAndrew Lunn if (err < 0) 12391323061aSAndrew Lunn return err; 12401323061aSAndrew Lunn 12411323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 12421323061aSAndrew Lunn return 0; 12431323061aSAndrew Lunn 12441323061aSAndrew Lunn case hwmon_curr_min_alarm: 12451323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12461323061aSAndrew Lunn if (err < 0) 12471323061aSAndrew Lunn return err; 12481323061aSAndrew Lunn 12491323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 12501323061aSAndrew Lunn return 0; 12511323061aSAndrew Lunn 12521323061aSAndrew Lunn case hwmon_curr_max_alarm: 12531323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12541323061aSAndrew Lunn if (err < 0) 12551323061aSAndrew Lunn return err; 12561323061aSAndrew Lunn 12571323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 12581323061aSAndrew Lunn return 0; 12591323061aSAndrew Lunn 12601323061aSAndrew Lunn case hwmon_curr_crit_alarm: 12611323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12621323061aSAndrew Lunn if (err < 0) 12631323061aSAndrew Lunn return err; 12641323061aSAndrew Lunn 12651323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 12661323061aSAndrew Lunn return 0; 12671323061aSAndrew Lunn default: 12681323061aSAndrew Lunn return -EOPNOTSUPP; 12691323061aSAndrew Lunn } 12701323061aSAndrew Lunn 12711323061aSAndrew Lunn return -EOPNOTSUPP; 12721323061aSAndrew Lunn } 12731323061aSAndrew Lunn 12741323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 12751323061aSAndrew Lunn { 12761323061aSAndrew Lunn u8 status; 12771323061aSAndrew Lunn int err; 12781323061aSAndrew Lunn 12791323061aSAndrew Lunn switch (attr) { 12801323061aSAndrew Lunn case hwmon_power_input: 12811323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 12821323061aSAndrew Lunn 12831323061aSAndrew Lunn case hwmon_power_lcrit: 12841323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 12851323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12861323061aSAndrew Lunn return 0; 12871323061aSAndrew Lunn 12881323061aSAndrew Lunn case hwmon_power_min: 12891323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 12901323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12911323061aSAndrew Lunn return 0; 12921323061aSAndrew Lunn 12931323061aSAndrew Lunn case hwmon_power_max: 12941323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 12951323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12961323061aSAndrew Lunn return 0; 12971323061aSAndrew Lunn 12981323061aSAndrew Lunn case hwmon_power_crit: 12991323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 13001323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 13011323061aSAndrew Lunn return 0; 13021323061aSAndrew Lunn 13031323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 13041323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 13051323061aSAndrew Lunn if (err < 0) 13061323061aSAndrew Lunn return err; 13071323061aSAndrew Lunn 13081323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 13091323061aSAndrew Lunn return 0; 13101323061aSAndrew Lunn 13111323061aSAndrew Lunn case hwmon_power_min_alarm: 13121323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 13131323061aSAndrew Lunn if (err < 0) 13141323061aSAndrew Lunn return err; 13151323061aSAndrew Lunn 13161323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 13171323061aSAndrew Lunn return 0; 13181323061aSAndrew Lunn 13191323061aSAndrew Lunn case hwmon_power_max_alarm: 13201323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 13211323061aSAndrew Lunn if (err < 0) 13221323061aSAndrew Lunn return err; 13231323061aSAndrew Lunn 13241323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 13251323061aSAndrew Lunn return 0; 13261323061aSAndrew Lunn 13271323061aSAndrew Lunn case hwmon_power_crit_alarm: 13281323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 13291323061aSAndrew Lunn if (err < 0) 13301323061aSAndrew Lunn return err; 13311323061aSAndrew Lunn 13321323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 13331323061aSAndrew Lunn return 0; 13341323061aSAndrew Lunn default: 13351323061aSAndrew Lunn return -EOPNOTSUPP; 13361323061aSAndrew Lunn } 13371323061aSAndrew Lunn 13381323061aSAndrew Lunn return -EOPNOTSUPP; 13391323061aSAndrew Lunn } 13401323061aSAndrew Lunn 13411323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 13421323061aSAndrew Lunn { 13431323061aSAndrew Lunn u8 status; 13441323061aSAndrew Lunn int err; 13451323061aSAndrew Lunn 13461323061aSAndrew Lunn switch (attr) { 13471323061aSAndrew Lunn case hwmon_power_input: 13481323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 13491323061aSAndrew Lunn 13501323061aSAndrew Lunn case hwmon_power_lcrit: 13511323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 13521323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13531323061aSAndrew Lunn return 0; 13541323061aSAndrew Lunn 13551323061aSAndrew Lunn case hwmon_power_min: 13561323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 13571323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13581323061aSAndrew Lunn return 0; 13591323061aSAndrew Lunn 13601323061aSAndrew Lunn case hwmon_power_max: 13611323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 13621323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13631323061aSAndrew Lunn return 0; 13641323061aSAndrew Lunn 13651323061aSAndrew Lunn case hwmon_power_crit: 13661323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 13671323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13681323061aSAndrew Lunn return 0; 13691323061aSAndrew Lunn 13701323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 13711323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 13721323061aSAndrew Lunn if (err < 0) 13731323061aSAndrew Lunn return err; 13741323061aSAndrew Lunn 13751323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 13761323061aSAndrew Lunn return 0; 13771323061aSAndrew Lunn 13781323061aSAndrew Lunn case hwmon_power_min_alarm: 13791323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 13801323061aSAndrew Lunn if (err < 0) 13811323061aSAndrew Lunn return err; 13821323061aSAndrew Lunn 13831323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 13841323061aSAndrew Lunn return 0; 13851323061aSAndrew Lunn 13861323061aSAndrew Lunn case hwmon_power_max_alarm: 13871323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 13881323061aSAndrew Lunn if (err < 0) 13891323061aSAndrew Lunn return err; 13901323061aSAndrew Lunn 13911323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 13921323061aSAndrew Lunn return 0; 13931323061aSAndrew Lunn 13941323061aSAndrew Lunn case hwmon_power_crit_alarm: 13951323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 13961323061aSAndrew Lunn if (err < 0) 13971323061aSAndrew Lunn return err; 13981323061aSAndrew Lunn 13991323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 14001323061aSAndrew Lunn return 0; 14011323061aSAndrew Lunn default: 14021323061aSAndrew Lunn return -EOPNOTSUPP; 14031323061aSAndrew Lunn } 14041323061aSAndrew Lunn 14051323061aSAndrew Lunn return -EOPNOTSUPP; 14061323061aSAndrew Lunn } 14071323061aSAndrew Lunn 14081323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 14091323061aSAndrew Lunn u32 attr, int channel, long *value) 14101323061aSAndrew Lunn { 14111323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 14121323061aSAndrew Lunn 14131323061aSAndrew Lunn switch (type) { 14141323061aSAndrew Lunn case hwmon_temp: 14151323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 14161323061aSAndrew Lunn case hwmon_in: 14171323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 14181323061aSAndrew Lunn case hwmon_curr: 14191323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 14201323061aSAndrew Lunn case hwmon_power: 14211323061aSAndrew Lunn switch (channel) { 14221323061aSAndrew Lunn case 0: 14231323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 14241323061aSAndrew Lunn case 1: 14251323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 14261323061aSAndrew Lunn default: 14271323061aSAndrew Lunn return -EOPNOTSUPP; 14281323061aSAndrew Lunn } 14291323061aSAndrew Lunn default: 14301323061aSAndrew Lunn return -EOPNOTSUPP; 14311323061aSAndrew Lunn } 14321323061aSAndrew Lunn } 14331323061aSAndrew Lunn 1434c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1435c1236979SAndrew Lunn "TX_power", 1436c1236979SAndrew Lunn "RX_power", 1437c1236979SAndrew Lunn }; 1438c1236979SAndrew Lunn 1439c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1440c1236979SAndrew Lunn enum hwmon_sensor_types type, 1441c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1442c1236979SAndrew Lunn { 1443c1236979SAndrew Lunn switch (type) { 1444c1236979SAndrew Lunn case hwmon_curr: 1445c1236979SAndrew Lunn switch (attr) { 1446c1236979SAndrew Lunn case hwmon_curr_label: 1447c1236979SAndrew Lunn *str = "bias"; 1448c1236979SAndrew Lunn return 0; 1449c1236979SAndrew Lunn default: 1450c1236979SAndrew Lunn return -EOPNOTSUPP; 1451c1236979SAndrew Lunn } 1452c1236979SAndrew Lunn break; 1453c1236979SAndrew Lunn case hwmon_temp: 1454c1236979SAndrew Lunn switch (attr) { 1455c1236979SAndrew Lunn case hwmon_temp_label: 1456c1236979SAndrew Lunn *str = "temperature"; 1457c1236979SAndrew Lunn return 0; 1458c1236979SAndrew Lunn default: 1459c1236979SAndrew Lunn return -EOPNOTSUPP; 1460c1236979SAndrew Lunn } 1461c1236979SAndrew Lunn break; 1462c1236979SAndrew Lunn case hwmon_in: 1463c1236979SAndrew Lunn switch (attr) { 1464c1236979SAndrew Lunn case hwmon_in_label: 1465c1236979SAndrew Lunn *str = "VCC"; 1466c1236979SAndrew Lunn return 0; 1467c1236979SAndrew Lunn default: 1468c1236979SAndrew Lunn return -EOPNOTSUPP; 1469c1236979SAndrew Lunn } 1470c1236979SAndrew Lunn break; 1471c1236979SAndrew Lunn case hwmon_power: 1472c1236979SAndrew Lunn switch (attr) { 1473c1236979SAndrew Lunn case hwmon_power_label: 1474c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1475c1236979SAndrew Lunn return 0; 1476c1236979SAndrew Lunn default: 1477c1236979SAndrew Lunn return -EOPNOTSUPP; 1478c1236979SAndrew Lunn } 1479c1236979SAndrew Lunn break; 1480c1236979SAndrew Lunn default: 1481c1236979SAndrew Lunn return -EOPNOTSUPP; 1482c1236979SAndrew Lunn } 1483c1236979SAndrew Lunn 1484c1236979SAndrew Lunn return -EOPNOTSUPP; 1485c1236979SAndrew Lunn } 1486c1236979SAndrew Lunn 14871323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 14881323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 14891323061aSAndrew Lunn .read = sfp_hwmon_read, 1490c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 14911323061aSAndrew Lunn }; 14921323061aSAndrew Lunn 1493490fde26SKrzysztof Kozlowski static const struct hwmon_channel_info * const sfp_hwmon_info[] = { 1494815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1495815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1496815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 14971323061aSAndrew Lunn HWMON_I_INPUT | 14981323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 14991323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 15001323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1501c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1502815f5f57SBeniamin Sandu HWMON_I_LABEL), 1503815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1504815f5f57SBeniamin Sandu HWMON_T_INPUT | 1505815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1506815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1507815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1508815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1509815f5f57SBeniamin Sandu HWMON_T_LABEL), 1510815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 15111323061aSAndrew Lunn HWMON_C_INPUT | 15121323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 15131323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 15141323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1515c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1516815f5f57SBeniamin Sandu HWMON_C_LABEL), 1517815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 15181323061aSAndrew Lunn /* Transmit power */ 15191323061aSAndrew Lunn HWMON_P_INPUT | 15201323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 15211323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 15221323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1523c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1524c1236979SAndrew Lunn HWMON_P_LABEL, 15251323061aSAndrew Lunn /* Receive power */ 15261323061aSAndrew Lunn HWMON_P_INPUT | 15271323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 15281323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 15291323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1530c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1531815f5f57SBeniamin Sandu HWMON_P_LABEL), 15321323061aSAndrew Lunn NULL, 15331323061aSAndrew Lunn }; 15341323061aSAndrew Lunn 15351323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 15361323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 15371323061aSAndrew Lunn .info = sfp_hwmon_info, 15381323061aSAndrew Lunn }; 15391323061aSAndrew Lunn 1540139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 15411323061aSAndrew Lunn { 1542139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 15433f118c44SMichael Walle int err; 15441323061aSAndrew Lunn 1545426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1546426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1547426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1548426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1549426c6cbcSPali Rohár * skip registration of hwmon device. 1550426c6cbcSPali Rohár */ 1551426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1552426c6cbcSPali Rohár dev_info(sfp->dev, 1553426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1554426c6cbcSPali Rohár dev_info(sfp->dev, 1555426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1556426c6cbcSPali Rohár return; 1557426c6cbcSPali Rohár } 1558426c6cbcSPali Rohár 1559139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1560139d3a21SRussell King if (err < 0) { 1561139d3a21SRussell King if (sfp->hwmon_tries--) { 1562139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1563139d3a21SRussell King T_PROBE_RETRY_SLOW); 1564139d3a21SRussell King } else { 15659ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 15669ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1567139d3a21SRussell King } 1568139d3a21SRussell King return; 1569139d3a21SRussell King } 1570139d3a21SRussell King 15713f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 15723f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1573139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1574139d3a21SRussell King return; 1575139d3a21SRussell King } 1576139d3a21SRussell King 1577139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1578139d3a21SRussell King sfp->hwmon_name, sfp, 1579139d3a21SRussell King &sfp_hwmon_chip_info, 1580139d3a21SRussell King NULL); 1581139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1582139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1583139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1584139d3a21SRussell King } 1585139d3a21SRussell King 1586139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1587139d3a21SRussell King { 1588f94b9bedSRussell King (Oracle) if (sfp->have_a2 && sfp->id.ext.diagmon & SFP_DIAGMON_DDM) { 1589139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1590139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 1591f94b9bedSRussell King (Oracle) } 15921323061aSAndrew Lunn 1593139d3a21SRussell King return 0; 15941323061aSAndrew Lunn } 15951323061aSAndrew Lunn 15961323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15971323061aSAndrew Lunn { 1598139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 15993e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 16001323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 16013e322474SAndrew Lunn sfp->hwmon_dev = NULL; 16021323061aSAndrew Lunn kfree(sfp->hwmon_name); 16031323061aSAndrew Lunn } 16043e322474SAndrew Lunn } 1605139d3a21SRussell King 1606139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1607139d3a21SRussell King { 1608139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1609139d3a21SRussell King 1610139d3a21SRussell King return 0; 1611139d3a21SRussell King } 1612139d3a21SRussell King 1613139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1614139d3a21SRussell King { 1615139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1616139d3a21SRussell King } 16171323061aSAndrew Lunn #else 16181323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 16191323061aSAndrew Lunn { 16201323061aSAndrew Lunn return 0; 16211323061aSAndrew Lunn } 16221323061aSAndrew Lunn 16231323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 16241323061aSAndrew Lunn { 16251323061aSAndrew Lunn } 1626139d3a21SRussell King 1627139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1628139d3a21SRussell King { 1629139d3a21SRussell King return 0; 1630139d3a21SRussell King } 1631139d3a21SRussell King 1632139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1633139d3a21SRussell King { 1634139d3a21SRussell King } 16351323061aSAndrew Lunn #endif 16361323061aSAndrew Lunn 163773970055SRussell King /* Helpers */ 163873970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 163973970055SRussell King { 164073970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 164173970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 1642418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, SFP_F_TX_DISABLE); 164373970055SRussell King } 164473970055SRussell King 164573970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 164673970055SRussell King { 164773970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 164873970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 1649418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, 0); 165073970055SRussell King } 165173970055SRussell King 16529cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 16539cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 16549cc8976cSRussell King { 16559cc8976cSRussell King struct sfp *sfp = s->private; 16569cc8976cSRussell King 16579cc8976cSRussell King seq_printf(s, "Module state: %s\n", 16589cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 16599cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 16609cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 16619cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 16629cc8976cSRussell King seq_printf(s, "Device state: %s\n", 16639cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 16649cc8976cSRussell King seq_printf(s, "Main state: %s\n", 16659cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 16669cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 16679cc8976cSRussell King sfp->sm_fault_retries); 16689cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 16699cc8976cSRussell King sfp->sm_phy_retries); 1670fc082b39SRussell King (Oracle) seq_printf(s, "Signalling rate: %u kBd\n", sfp->rate_kbd); 1671fc082b39SRussell King (Oracle) seq_printf(s, "Rate select threshold: %u kBd\n", 1672fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd); 16739cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 16749cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 16759cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 16769cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 1677fc082b39SRussell King (Oracle) seq_printf(s, "rs0: %d\n", !!(sfp->state & SFP_F_RS0)); 1678fc082b39SRussell King (Oracle) seq_printf(s, "rs1: %d\n", !!(sfp->state & SFP_F_RS1)); 16799cc8976cSRussell King return 0; 16809cc8976cSRussell King } 16819cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 16829cc8976cSRussell King 16839cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 16849cc8976cSRussell King { 16859cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 16869cc8976cSRussell King 16879cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 16889cc8976cSRussell King &sfp_debug_state_fops); 16899cc8976cSRussell King } 16909cc8976cSRussell King 16919cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 16929cc8976cSRussell King { 16939cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 16949cc8976cSRussell King } 16959cc8976cSRussell King #else 16969cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 16979cc8976cSRussell King { 16989cc8976cSRussell King } 16999cc8976cSRussell King 17009cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 17019cc8976cSRussell King { 17029cc8976cSRussell King } 17039cc8976cSRussell King #endif 17049cc8976cSRussell King 170573970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 170673970055SRussell King { 17071974fd3bSRussell King (Oracle) unsigned int state; 170873970055SRussell King 17091974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 17101974fd3bSRussell King (Oracle) state = sfp->state; 17111974fd3bSRussell King (Oracle) if (!(state & SFP_F_TX_DISABLE)) { 171273970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 171373970055SRussell King 171473970055SRussell King udelay(T_RESET_US); 171573970055SRussell King 171673970055SRussell King sfp_set_state(sfp, state); 171773970055SRussell King } 17181974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 17191974fd3bSRussell King (Oracle) } 172073970055SRussell King 172173970055SRussell King /* SFP state machine */ 172273970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 172373970055SRussell King { 172473970055SRussell King if (timeout) 172573970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 172673970055SRussell King timeout); 172773970055SRussell King else 172873970055SRussell King cancel_delayed_work(&sfp->timeout); 172973970055SRussell King } 173073970055SRussell King 173173970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 173273970055SRussell King unsigned int timeout) 173373970055SRussell King { 173473970055SRussell King sfp->sm_state = state; 173573970055SRussell King sfp_sm_set_timer(sfp, timeout); 173673970055SRussell King } 173773970055SRussell King 17380936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1739516b29edSFlorian Fainelli unsigned int timeout) 174073970055SRussell King { 174173970055SRussell King sfp->sm_mod_state = state; 174273970055SRussell King sfp_sm_set_timer(sfp, timeout); 174373970055SRussell King } 174473970055SRussell King 174573970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 174673970055SRussell King { 174773970055SRussell King sfp_remove_phy(sfp->sfp_bus); 174873970055SRussell King phy_device_remove(sfp->mod_phy); 174973970055SRussell King phy_device_free(sfp->mod_phy); 175073970055SRussell King sfp->mod_phy = NULL; 175173970055SRussell King } 175273970055SRussell King 1753324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 175473970055SRussell King { 175573970055SRussell King struct phy_device *phy; 175673970055SRussell King int err; 175773970055SRussell King 1758324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 17591cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 17601cb89a14SRussell King return PTR_ERR(phy); 176120b56ed9SRussell King if (IS_ERR(phy)) { 17629ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1763256e43cbSRussell King return PTR_ERR(phy); 176473970055SRussell King } 176573970055SRussell King 1766*f4bf4678SRussell King (Oracle) /* Mark this PHY as being on a SFP module */ 1767*f4bf4678SRussell King (Oracle) phy->is_on_sfp_module = true; 1768*f4bf4678SRussell King (Oracle) 17699a484621SRussell King err = phy_device_register(phy); 17709a484621SRussell King if (err) { 17719a484621SRussell King phy_device_free(phy); 17729ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 17739ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1774256e43cbSRussell King return err; 17759a484621SRussell King } 17769a484621SRussell King 177773970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 177873970055SRussell King if (err) { 177973970055SRussell King phy_device_remove(phy); 178073970055SRussell King phy_device_free(phy); 17819ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1782256e43cbSRussell King return err; 178373970055SRussell King } 178473970055SRussell King 178573970055SRussell King sfp->mod_phy = phy; 1786256e43cbSRussell King 1787256e43cbSRussell King return 0; 178873970055SRussell King } 178973970055SRussell King 179073970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 179173970055SRussell King { 179273970055SRussell King sfp_link_up(sfp->sfp_bus); 179373970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 179473970055SRussell King } 179573970055SRussell King 179673970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 179773970055SRussell King { 179873970055SRussell King sfp_link_down(sfp->sfp_bus); 179973970055SRussell King } 180073970055SRussell King 180173970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 180273970055SRussell 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 bool los = false; 180773970055SRussell King 1808710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1809624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1810624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 181173970055SRussell King */ 1812624407d2SRussell King if (los_options == los_inverted) 1813624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1814624407d2SRussell King else if (los_options == los_normal) 1815624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 181673970055SRussell King 181773970055SRussell King if (los) 181873970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 181973970055SRussell King else 182073970055SRussell King sfp_sm_link_up(sfp); 182173970055SRussell King } 182273970055SRussell King 1823710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1824710dfbb0SRussell King { 1825624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1826624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1827624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1828624407d2SRussell King 1829624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1830624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1831710dfbb0SRussell King } 1832710dfbb0SRussell King 1833710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1834710dfbb0SRussell King { 1835624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1836624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1837624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1838624407d2SRussell King 1839624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1840624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1841710dfbb0SRussell King } 1842710dfbb0SRussell King 184363ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 184473970055SRussell King { 1845281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1846516b29edSFlorian Fainelli dev_err(sfp->dev, 1847516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 184873970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 184973970055SRussell King } else { 185073970055SRussell King if (warn) 185173970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 185273970055SRussell King 185363ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 185473970055SRussell King } 185573970055SRussell King } 185673970055SRussell King 1857e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1858e85b1347SMarek Behún { 1859e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1860e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1861e85b1347SMarek Behún 1862e85b1347SMarek Behún return 0; 1863e85b1347SMarek Behún } 1864e85b1347SMarek Behún 18659a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 18669a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 18679a484621SRussell King * or clause 45 PHY. 18689a484621SRussell King * 18699a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 18709a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 18719a484621SRussell King * PHY driver to determine. 18729a484621SRussell King * 18739a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 18749a484621SRussell King * mode according to the negotiated line speed. 18759a484621SRussell King */ 1876256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1877181f29daSRussell King { 1878256e43cbSRussell King int err = 0; 1879256e43cbSRussell King 1880e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1881e85b1347SMarek Behún case MDIO_I2C_NONE: 18829a484621SRussell King break; 18839a484621SRussell King 1884e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1885324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 18869a484621SRussell King break; 1887e85b1347SMarek Behún 1888e85b1347SMarek Behún case MDIO_I2C_C45: 1889324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1890e85b1347SMarek Behún break; 189109bbedacSMarek Behún 189209bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1893324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 189409bbedacSMarek Behún break; 18959a484621SRussell King } 1896e85b1347SMarek Behún 1897256e43cbSRussell King return err; 189873970055SRussell King } 189973970055SRussell King 1900ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 19013bb35261SJon Nettleton { 1902ed32abb1SRussell King u32 power_mW = 1000; 19035765cee1SRussell King (Oracle) bool supports_a2; 19043bb35261SJon Nettleton 190518cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 190618cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1907ed32abb1SRussell King power_mW = 1500; 1908f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1909f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1910f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1911ed32abb1SRussell King power_mW = 2000; 19123bb35261SJon Nettleton 191302eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 191402eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 191502eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 191602eaf5a7SRussell King (Oracle) return 0; 191702eaf5a7SRussell King (Oracle) } 191802eaf5a7SRussell King (Oracle) 19195765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 19205765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 19215765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 19225765cee1SRussell King (Oracle) 1923ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 19247cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 19255765cee1SRussell King (Oracle) if (!supports_a2) { 19267cfa9c92SRussell King /* The module appears not to implement bus address 19277cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 19287cfa9c92SRussell King * indicated mode. 19297cfa9c92SRussell King */ 19303bb35261SJon Nettleton dev_err(sfp->dev, 19313bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1932ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 19333bb35261SJon Nettleton return -EINVAL; 19347cfa9c92SRussell King } else { 19353bb35261SJon Nettleton dev_warn(sfp->dev, 19363bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1937ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 19383bb35261SJon Nettleton return 0; 19393bb35261SJon Nettleton } 19407cfa9c92SRussell King } 19417cfa9c92SRussell King 19425765cee1SRussell King (Oracle) if (!supports_a2) { 19435765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 19445765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 19455765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 19465765cee1SRussell King (Oracle) */ 19475765cee1SRussell King (Oracle) return 0; 19485765cee1SRussell King (Oracle) } 19495765cee1SRussell King (Oracle) 19507cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 19517cfa9c92SRussell King * an address change sequence, warn the user that the module may 19527cfa9c92SRussell King * not be functional. 19537cfa9c92SRussell King */ 19545765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 19557cfa9c92SRussell King dev_warn(sfp->dev, 195607f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 19577cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 19587cfa9c92SRussell King return 0; 19597cfa9c92SRussell King } 19603bb35261SJon Nettleton 1961ed32abb1SRussell King sfp->module_power_mW = power_mW; 1962ed32abb1SRussell King 1963ed32abb1SRussell King return 0; 1964ed32abb1SRussell King } 1965ed32abb1SRussell King 1966b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1967ed32abb1SRussell King { 1968ed32abb1SRussell King int err; 1969ed32abb1SRussell King 1970bd1432f6SRussell King (Oracle) err = sfp_modify_u8(sfp, true, SFP_EXT_STATUS, 1971bd1432f6SRussell King (Oracle) SFP_EXT_STATUS_PWRLVL_SELECT, 1972bd1432f6SRussell King (Oracle) enable ? SFP_EXT_STATUS_PWRLVL_SELECT : 0); 1973bd1432f6SRussell King (Oracle) if (err != sizeof(u8)) { 1974bd1432f6SRussell King (Oracle) dev_err(sfp->dev, "failed to %sable high power: %pe\n", 1975bd1432f6SRussell King (Oracle) enable ? "en" : "dis", ERR_PTR(err)); 1976b036a554SRussell King return -EAGAIN; 19773bb35261SJon Nettleton } 19783bb35261SJon Nettleton 1979b036a554SRussell King if (enable) 19803bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1981ed32abb1SRussell King sfp->module_power_mW / 1000, 1982ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 19833bb35261SJon Nettleton 1984b036a554SRussell King return 0; 19853bb35261SJon Nettleton } 19863bb35261SJon Nettleton 1987fc082b39SRussell King (Oracle) static void sfp_module_parse_rate_select(struct sfp *sfp) 1988fc082b39SRussell King (Oracle) { 1989fc082b39SRussell King (Oracle) u8 rate_id; 1990fc082b39SRussell King (Oracle) 1991fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 0; 1992fc082b39SRussell King (Oracle) sfp->rs_state_mask = 0; 1993fc082b39SRussell King (Oracle) 1994fc082b39SRussell King (Oracle) if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_RATE_SELECT))) 1995fc082b39SRussell King (Oracle) /* No support for RateSelect */ 1996fc082b39SRussell King (Oracle) return; 1997fc082b39SRussell King (Oracle) 1998fc082b39SRussell King (Oracle) /* Default to INF-8074 RateSelect operation. The signalling threshold 1999fc082b39SRussell King (Oracle) * rate is not well specified, so always select "Full Bandwidth", but 2000fc082b39SRussell King (Oracle) * SFF-8079 reveals that it is understood that RS0 will be low for 2001fc082b39SRussell King (Oracle) * 1.0625Gb/s and high for 2.125Gb/s. Choose a value half-way between. 2002fc082b39SRussell King (Oracle) * This method exists prior to SFF-8472. 2003fc082b39SRussell King (Oracle) */ 2004fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 2005fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 1594; 2006fc082b39SRussell King (Oracle) 2007fc082b39SRussell King (Oracle) /* Parse the rate identifier, which is complicated due to history: 2008fc082b39SRussell King (Oracle) * SFF-8472 rev 9.5 marks this field as reserved. 2009fc082b39SRussell King (Oracle) * SFF-8079 references SFF-8472 rev 9.5 and defines bit 0. SFF-8472 2010fc082b39SRussell King (Oracle) * compliance is not required. 2011fc082b39SRussell King (Oracle) * SFF-8472 rev 10.2 defines this field using values 0..4 2012fc082b39SRussell King (Oracle) * SFF-8472 rev 11.0 redefines this field with bit 0 for SFF-8079 2013fc082b39SRussell King (Oracle) * and even values. 2014fc082b39SRussell King (Oracle) */ 2015fc082b39SRussell King (Oracle) rate_id = sfp->id.base.rate_id; 2016fc082b39SRussell King (Oracle) if (rate_id == 0) 2017fc082b39SRussell King (Oracle) /* Unspecified */ 2018fc082b39SRussell King (Oracle) return; 2019fc082b39SRussell King (Oracle) 2020fc082b39SRussell King (Oracle) /* SFF-8472 rev 10.0..10.4 did not account for SFF-8079 using bit 0, 2021fc082b39SRussell King (Oracle) * and allocated value 3 to SFF-8431 independent tx/rx rate select. 2022fc082b39SRussell King (Oracle) * Convert this to a SFF-8472 rev 11.0 rate identifier. 2023fc082b39SRussell King (Oracle) */ 2024fc082b39SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 2025fc082b39SRussell King (Oracle) sfp->id.ext.sff8472_compliance < SFP_SFF8472_COMPLIANCE_REV11_0 && 2026fc082b39SRussell King (Oracle) rate_id == 3) 2027fc082b39SRussell King (Oracle) rate_id = SFF_RID_8431; 2028fc082b39SRussell King (Oracle) 2029fc082b39SRussell King (Oracle) if (rate_id & SFF_RID_8079) { 2030fc082b39SRussell King (Oracle) /* SFF-8079 RateSelect / Application Select in conjunction with 2031fc082b39SRussell King (Oracle) * SFF-8472 rev 9.5. SFF-8079 defines rate_id as a bitfield 2032fc082b39SRussell King (Oracle) * with only bit 0 used, which takes precedence over SFF-8472. 2033fc082b39SRussell King (Oracle) */ 2034fc082b39SRussell King (Oracle) if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_APP_SELECT_SFF8079)) { 2035fc082b39SRussell King (Oracle) /* SFF-8079 Part 1 - rate selection between Fibre 2036fc082b39SRussell King (Oracle) * Channel 1.0625/2.125/4.25 Gbd modes. Note that RS0 2037fc082b39SRussell King (Oracle) * is high for 2125, so we have to subtract 1 to 2038fc082b39SRussell King (Oracle) * include it. 2039fc082b39SRussell King (Oracle) */ 2040fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 2125 - 1; 2041fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 2042fc082b39SRussell King (Oracle) } 2043fc082b39SRussell King (Oracle) return; 2044fc082b39SRussell King (Oracle) } 2045fc082b39SRussell King (Oracle) 2046fc082b39SRussell King (Oracle) /* SFF-8472 rev 9.5 does not define the rate identifier */ 2047fc082b39SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance <= SFP_SFF8472_COMPLIANCE_REV9_5) 2048fc082b39SRussell King (Oracle) return; 2049fc082b39SRussell King (Oracle) 2050fc082b39SRussell King (Oracle) /* SFF-8472 rev 11.0 defines rate_id as a numerical value which will 2051fc082b39SRussell King (Oracle) * always have bit 0 clear due to SFF-8079's bitfield usage of rate_id. 2052fc082b39SRussell King (Oracle) */ 2053fc082b39SRussell King (Oracle) switch (rate_id) { 2054fc082b39SRussell King (Oracle) case SFF_RID_8431_RX_ONLY: 2055fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2056fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 2057fc082b39SRussell King (Oracle) break; 2058fc082b39SRussell King (Oracle) 2059fc082b39SRussell King (Oracle) case SFF_RID_8431_TX_ONLY: 2060fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2061fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS1; 2062fc082b39SRussell King (Oracle) break; 2063fc082b39SRussell King (Oracle) 2064fc082b39SRussell King (Oracle) case SFF_RID_8431: 2065fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2066fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0 | SFP_F_RS1; 2067fc082b39SRussell King (Oracle) break; 2068fc082b39SRussell King (Oracle) 2069fc082b39SRussell King (Oracle) case SFF_RID_10G8G: 2070fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 9000; 2071fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0 | SFP_F_RS1; 2072fc082b39SRussell King (Oracle) break; 2073fc082b39SRussell King (Oracle) } 2074fc082b39SRussell King (Oracle) } 2075fc082b39SRussell King (Oracle) 2076426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 2077426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 2078426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 2079426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 2080426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 2081426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 2082426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 2083426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 2084426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 2085426c6cbcSPali Rohár * at a time. 20860d035bedSRussell King */ 2087426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 20880d035bedSRussell King { 2089426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 20900d035bedSRussell King 2091426c6cbcSPali Rohár /* Already using byte IO */ 2092426c6cbcSPali Rohár if (block_size == 1) 2093426c6cbcSPali Rohár return false; 2094426c6cbcSPali Rohár 2095426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 2096426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 2097426c6cbcSPali Rohár return false; 20980d035bedSRussell King } 2099426c6cbcSPali Rohár return true; 21000d035bedSRussell King } 21010d035bedSRussell King 2102b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 2103b18432c5SChris Healy { 2104b18432c5SChris Healy u8 check; 2105b18432c5SChris Healy int err; 2106b18432c5SChris Healy 2107b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 2108b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 2109b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 2110b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 2111b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 2112b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 2113b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 2114b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 2115b18432c5SChris Healy if (err != 3) { 21169ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 21179ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 21189ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 2119b18432c5SChris Healy return err; 2120b18432c5SChris Healy } 2121b18432c5SChris Healy 2122b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 2123b18432c5SChris Healy mdelay(50); 2124b18432c5SChris Healy 2125b18432c5SChris Healy /* Update base structure checksum */ 2126b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 2127b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 2128b18432c5SChris Healy if (err != 1) { 21299ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 21309ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 21319ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 2132b18432c5SChris Healy return err; 2133b18432c5SChris Healy } 2134b18432c5SChris Healy } 2135b18432c5SChris Healy return 0; 2136b18432c5SChris Healy } 2137b18432c5SChris Healy 2138f94b9bedSRussell King (Oracle) static int sfp_module_parse_sff8472(struct sfp *sfp) 2139f94b9bedSRussell King (Oracle) { 2140f94b9bedSRussell King (Oracle) /* If the module requires address swap mode, warn about it */ 2141f94b9bedSRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 2142f94b9bedSRussell King (Oracle) dev_warn(sfp->dev, 2143f94b9bedSRussell King (Oracle) "module address swap to access page 0xA2 is not supported.\n"); 2144f94b9bedSRussell King (Oracle) else 2145f94b9bedSRussell King (Oracle) sfp->have_a2 = true; 2146f94b9bedSRussell King (Oracle) 2147f94b9bedSRussell King (Oracle) return 0; 2148f94b9bedSRussell King (Oracle) } 2149f94b9bedSRussell King (Oracle) 2150e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 215173970055SRussell King { 215273970055SRussell King /* SFP module inserted - read I2C data */ 215373970055SRussell King struct sfp_eeprom_id id; 2154b18432c5SChris Healy bool cotsworks_sfbg; 21551974fd3bSRussell King (Oracle) unsigned int mask; 2156981f1f80SRussell King bool cotsworks; 215773970055SRussell King u8 check; 21583bb35261SJon Nettleton int ret; 215973970055SRussell King 2160813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 21610d035bedSRussell King 21620d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 21633bb35261SJon Nettleton if (ret < 0) { 2164e117be74SRussell King if (report) 21659ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 21669ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 216773970055SRussell King return -EAGAIN; 216873970055SRussell King } 216973970055SRussell King 21700d035bedSRussell King if (ret != sizeof(id.base)) { 21719ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 217273970055SRussell King return -EAGAIN; 217373970055SRussell King } 217473970055SRussell King 2175426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 2176426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 2177426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 2178426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 2179426c6cbcSPali Rohár * is really required and we have no other option. 2180426c6cbcSPali Rohár */ 2181426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 2182426c6cbcSPali Rohár dev_info(sfp->dev, 2183426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 2184426c6cbcSPali Rohár dev_info(sfp->dev, 2185426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 2186426c6cbcSPali Rohár sfp->i2c_block_size = 1; 2187426c6cbcSPali Rohár 2188426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 2189426c6cbcSPali Rohár if (ret < 0) { 2190426c6cbcSPali Rohár if (report) 21919ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 21929ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 21939ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2194426c6cbcSPali Rohár return -EAGAIN; 2195426c6cbcSPali Rohár } 2196426c6cbcSPali Rohár 2197426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 21989ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 21999ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2200426c6cbcSPali Rohár return -EAGAIN; 2201426c6cbcSPali Rohár } 2202426c6cbcSPali Rohár } 2203426c6cbcSPali Rohár 2204981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 2205981f1f80SRussell King * do the final programming with the final module part number, 2206981f1f80SRussell King * serial number and date code. 2207981f1f80SRussell King */ 2208981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 2209b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 2210b18432c5SChris Healy 2211b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 2212b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 2213b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 2214b18432c5SChris Healy */ 2215b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 2216b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 2217b18432c5SChris Healy if (ret < 0) 2218b18432c5SChris Healy return ret; 2219b18432c5SChris Healy } 2220981f1f80SRussell King 222173970055SRussell King /* Validate the checksum over the base structure */ 222273970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 222373970055SRussell King if (check != id.base.cc_base) { 2224981f1f80SRussell King if (cotsworks) { 2225981f1f80SRussell King dev_warn(sfp->dev, 2226981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 2227981f1f80SRussell King check, id.base.cc_base); 2228981f1f80SRussell King } else { 222973970055SRussell King dev_err(sfp->dev, 2230981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2231981f1f80SRussell King check, id.base.cc_base); 223273970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2233981f1f80SRussell King 16, 1, &id, sizeof(id), true); 223473970055SRussell King return -EINVAL; 223573970055SRussell King } 2236981f1f80SRussell King } 223773970055SRussell King 22380d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 22390d035bedSRussell King if (ret < 0) { 22400d035bedSRussell King if (report) 22419ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 22429ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 22430d035bedSRussell King return -EAGAIN; 22440d035bedSRussell King } 22450d035bedSRussell King 22460d035bedSRussell King if (ret != sizeof(id.ext)) { 22479ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 22480d035bedSRussell King return -EAGAIN; 22490d035bedSRussell King } 22500d035bedSRussell King 225173970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 225273970055SRussell King if (check != id.ext.cc_ext) { 2253981f1f80SRussell King if (cotsworks) { 2254981f1f80SRussell King dev_warn(sfp->dev, 2255981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2256981f1f80SRussell King check, id.ext.cc_ext); 2257981f1f80SRussell King } else { 225873970055SRussell King dev_err(sfp->dev, 2259981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2260981f1f80SRussell King check, id.ext.cc_ext); 2261981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2262981f1f80SRussell King 16, 1, &id, sizeof(id), true); 226373970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 226473970055SRussell King } 2265981f1f80SRussell King } 226673970055SRussell King 226773970055SRussell King sfp->id = id; 226873970055SRussell King 2269a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2270a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2271a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2272a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2273a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2274a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 227573970055SRussell King 2276259c8618SRussell King /* Check whether we support this module */ 2277f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2278259c8618SRussell King dev_err(sfp->dev, 2279259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 228073970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 228173970055SRussell King return -EINVAL; 228273970055SRussell King } 228373970055SRussell King 2284f94b9bedSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance != SFP_SFF8472_COMPLIANCE_NONE) { 2285f94b9bedSRussell King (Oracle) ret = sfp_module_parse_sff8472(sfp); 2286f94b9bedSRussell King (Oracle) if (ret < 0) 2287f94b9bedSRussell King (Oracle) return ret; 2288f94b9bedSRussell King (Oracle) } 2289ec7681bdSRussell King 2290ed32abb1SRussell King /* Parse the module power requirement */ 2291ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2292ed32abb1SRussell King if (ret < 0) 2293ed32abb1SRussell King return ret; 2294ed32abb1SRussell King 2295fc082b39SRussell King (Oracle) sfp_module_parse_rate_select(sfp); 2296fc082b39SRussell King (Oracle) 22971974fd3bSRussell King (Oracle) mask = SFP_F_PRESENT; 22988475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 22991974fd3bSRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 23008475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 23011974fd3bSRussell King (Oracle) mask |= SFP_F_TX_FAULT; 23028475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 23031974fd3bSRussell King (Oracle) mask |= SFP_F_LOS; 2304fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0]) 2305fc082b39SRussell King (Oracle) mask |= SFP_F_RS0; 2306fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS1]) 2307fc082b39SRussell King (Oracle) mask |= SFP_F_RS1; 23088475c4b7SRussell King (Oracle) 230926c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2310324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 231126c97a2dSRussell King 23122069624dSMatthew Hagan sfp->tx_fault_ignore = false; 23132069624dSMatthew Hagan 2314e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2315e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2316e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2317e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2318e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2319e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2320e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2321e85b1347SMarek Behún else 2322e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2323e85b1347SMarek Behún 232423571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 23251974fd3bSRussell King (Oracle) 23261974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 23271974fd3bSRussell King (Oracle) /* Initialise state bits to use from hardware */ 23281974fd3bSRussell King (Oracle) sfp->state_hw_mask = mask; 23291974fd3bSRussell King (Oracle) 2330fc082b39SRussell King (Oracle) /* We want to drive the rate select pins that the module is using */ 2331fc082b39SRussell King (Oracle) sfp->state_hw_drive |= sfp->rs_state_mask; 2332fc082b39SRussell King (Oracle) 233327541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 233427541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 23351974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 233623571c7bSRussell King (Oracle) 2337b036a554SRussell King return 0; 233873970055SRussell King } 233973970055SRussell King 234073970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 234173970055SRussell King { 234273f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 234373970055SRussell King sfp_module_remove(sfp->sfp_bus); 234473970055SRussell King 23451323061aSAndrew Lunn sfp_hwmon_remove(sfp); 23461323061aSAndrew Lunn 234773970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2348ed32abb1SRussell King sfp->module_power_mW = 0; 2349fc082b39SRussell King (Oracle) sfp->state_hw_drive = SFP_F_TX_DISABLE; 2350f94b9bedSRussell King (Oracle) sfp->have_a2 = false; 235173970055SRussell King 235273970055SRussell King dev_info(sfp->dev, "module removed\n"); 235373970055SRussell King } 235473970055SRussell King 23556b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2356e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 235773970055SRussell King { 2358e85d81a1SRussell King switch (sfp->sm_dev_state) { 2359e85d81a1SRussell King default: 23606b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 23616b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 23626b0da5c9SRussell King break; 23636b0da5c9SRussell King 23646b0da5c9SRussell King case SFP_DEV_DOWN: 23656b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 23666b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 23676b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2368e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2369e85d81a1SRussell King break; 237073970055SRussell King 2371e85d81a1SRussell King case SFP_DEV_UP: 23726b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 23736b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 23746b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2375e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2376e85d81a1SRussell King break; 2377e85d81a1SRussell King } 2378e85d81a1SRussell King } 237973970055SRussell King 2380d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2381d900954fSRussell King * the on-board EEPROM, and sets up the power level. 238273970055SRussell King */ 2383e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2384e85d81a1SRussell King { 2385b036a554SRussell King int err; 2386b036a554SRussell King 2387b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2388b036a554SRussell King if (event == SFP_E_REMOVE) { 2389d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2390d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2391b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2392b036a554SRussell King return; 2393b036a554SRussell King } 2394b036a554SRussell King 2395b036a554SRussell King /* Handle device detach globally */ 239673f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 239773f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2398b036a554SRussell King if (sfp->module_power_mW > 1000 && 2399b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2400b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 240173f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2402d2e816c0SRussell King return; 2403d2e816c0SRussell King } 2404d2e816c0SRussell King 240573970055SRussell King switch (sfp->sm_mod_state) { 240673970055SRussell King default: 2407e117be74SRussell King if (event == SFP_E_INSERT) { 2408d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2409e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2410e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2411e117be74SRussell King } 241273970055SRussell King break; 241373970055SRussell King 241473970055SRussell King case SFP_MOD_PROBE: 241573f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2416b036a554SRussell King if (event != SFP_E_TIMEOUT) 2417b036a554SRussell King break; 241873970055SRussell King 2419e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2420b036a554SRussell King if (err == -EAGAIN) { 2421e117be74SRussell King if (sfp->sm_mod_tries_init && 2422e117be74SRussell King --sfp->sm_mod_tries_init) { 2423e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2424b036a554SRussell King break; 2425e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2426e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2427e117be74SRussell King dev_warn(sfp->dev, 2428e117be74SRussell King "please wait, module slow to respond\n"); 2429e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2430e117be74SRussell King break; 2431e117be74SRussell King } 2432b036a554SRussell King } 2433b036a554SRussell King if (err < 0) { 2434b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2435b036a554SRussell King break; 2436b036a554SRussell King } 2437b036a554SRussell King 243804361b8bSRussell King (Oracle) /* Force a poll to re-read the hardware signal state after 243904361b8bSRussell King (Oracle) * sfp_sm_mod_probe() changed state_hw_mask. 244004361b8bSRussell King (Oracle) */ 244104361b8bSRussell King (Oracle) mod_delayed_work(system_wq, &sfp->poll, 1); 244204361b8bSRussell King (Oracle) 244338ecd706SRussell King err = sfp_hwmon_insert(sfp); 244438ecd706SRussell King if (err) 24459ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 24469ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 244738ecd706SRussell King 244873f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2449df561f66SGustavo A. R. Silva fallthrough; 245073f5e847SRussell King case SFP_MOD_WAITDEV: 245173f5e847SRussell King /* Ensure that the device is attached before proceeding */ 245273f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 245373f5e847SRussell King break; 245473f5e847SRussell King 245573f5e847SRussell King /* Report the module insertion to the upstream device */ 245623571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 245723571c7bSRussell King (Oracle) sfp->quirk); 245873f5e847SRussell King if (err < 0) { 245973f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 246073f5e847SRussell King break; 246173f5e847SRussell King } 246273f5e847SRussell King 2463b036a554SRussell King /* If this is a power level 1 module, we are done */ 2464b036a554SRussell King if (sfp->module_power_mW <= 1000) 2465b036a554SRussell King goto insert; 2466b036a554SRussell King 2467b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2468df561f66SGustavo A. R. Silva fallthrough; 2469b036a554SRussell King case SFP_MOD_HPOWER: 2470b036a554SRussell King /* Enable high power mode */ 2471b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 247273f5e847SRussell King if (err < 0) { 247373f5e847SRussell King if (err != -EAGAIN) { 247473f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 24750936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 247673f5e847SRussell King } else { 2477e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 247873f5e847SRussell King } 247973f5e847SRussell King break; 248073f5e847SRussell King } 248173f5e847SRussell King 248273f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 248373970055SRussell King break; 248473970055SRussell King 2485b036a554SRussell King case SFP_MOD_WAITPWR: 2486b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2487b036a554SRussell King if (event != SFP_E_TIMEOUT) 2488b036a554SRussell King break; 2489b036a554SRussell King 2490b036a554SRussell King insert: 24910936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 24923bb35261SJon Nettleton break; 2493b036a554SRussell King 249473970055SRussell King case SFP_MOD_PRESENT: 249573970055SRussell King case SFP_MOD_ERROR: 249673970055SRussell King break; 249773970055SRussell King } 249873970055SRussell King } 249973970055SRussell King 2500e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2501e85d81a1SRussell King { 2502eefa6f1fSRussell King unsigned long timeout; 25031cb89a14SRussell King int ret; 2504eefa6f1fSRussell King 250573970055SRussell King /* Some events are global */ 250673970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 250773970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 250873970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 250973970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 251073970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 251173970055SRussell King sfp_sm_link_down(sfp); 251274c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 251374c551caSRussell King sfp_module_stop(sfp->sfp_bus); 251473970055SRussell King if (sfp->mod_phy) 251573970055SRussell King sfp_sm_phy_detach(sfp); 2516e85b1347SMarek Behún if (sfp->i2c_mii) 2517e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 25181539e0d3SRussell King sfp_module_tx_disable(sfp); 2519f3c9a666SRussell King sfp_soft_stop_poll(sfp); 252073970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 252173970055SRussell King return; 252273970055SRussell King } 252373970055SRussell King 252473970055SRussell King /* The main state machine */ 252573970055SRussell King switch (sfp->sm_state) { 252673970055SRussell King case SFP_S_DOWN: 2527eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2528eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2529eefa6f1fSRussell King break; 2530eefa6f1fSRussell King 25315daed426SRussell King (Oracle) /* Only use the soft state bits if we have access to the A2h 25325daed426SRussell King (Oracle) * memory, which implies that we have some level of SFF-8472 25335daed426SRussell King (Oracle) * compliance. 25345daed426SRussell King (Oracle) */ 25355daed426SRussell King (Oracle) if (sfp->have_a2) 2536f3c9a666SRussell King sfp_soft_start_poll(sfp); 2537f3c9a666SRussell King 2538f3c9a666SRussell King sfp_module_tx_enable(sfp); 2539eefa6f1fSRussell King 2540eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2541281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2542eefa6f1fSRussell King 2543eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2544eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2545324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2546324e88cbSMarek Behún * specific modules). 2547eefa6f1fSRussell King */ 2548324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2549eefa6f1fSRussell King break; 2550eefa6f1fSRussell King 2551eefa6f1fSRussell King case SFP_S_WAIT: 2552eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2553eefa6f1fSRussell King break; 2554eefa6f1fSRussell King 2555eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 255626c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 255726c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 255826c97a2dSRussell King * initialise, which is indicated by TX_FAULT 255926c97a2dSRussell King * deasserting. 2560181f29daSRussell King */ 256126c97a2dSRussell King timeout = sfp->module_t_start_up; 2562324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2563324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2564eefa6f1fSRussell King else 2565eefa6f1fSRussell King timeout = 1; 2566eefa6f1fSRussell King 2567eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2568eefa6f1fSRussell King } else { 2569eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2570eefa6f1fSRussell King * finished initialising. 2571eefa6f1fSRussell King */ 2572eefa6f1fSRussell King goto init_done; 2573181f29daSRussell King } 257473970055SRussell King break; 257573970055SRussell King 257673970055SRussell King case SFP_S_INIT: 2577d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2578e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 257926c97a2dSRussell King * or t_start_up, so assume there is a fault. 2580d23751a0SRussell King */ 2581d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2582281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2583d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 25841cb89a14SRussell King init_done: 2585e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2586e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2587e85b1347SMarek Behún if (ret < 0) { 2588e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2589e85b1347SMarek Behún break; 2590e85b1347SMarek Behún } 25911cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 25921cb89a14SRussell King goto phy_probe; 25931cb89a14SRussell King } 25941cb89a14SRussell King break; 25951cb89a14SRussell King 25961cb89a14SRussell King case SFP_S_INIT_PHY: 25971cb89a14SRussell King if (event != SFP_E_TIMEOUT) 25981cb89a14SRussell King break; 25991cb89a14SRussell King phy_probe: 26001cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2601d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2602d23751a0SRussell King */ 26031cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 26041cb89a14SRussell King if (ret == -ENODEV) { 26051cb89a14SRussell King if (--sfp->sm_phy_retries) { 26061cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 26071cb89a14SRussell King break; 26081cb89a14SRussell King } else { 26091cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 26101cb89a14SRussell King } 26111cb89a14SRussell King } else if (ret) { 2612256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2613256e43cbSRussell King break; 2614256e43cbSRussell King } 261574c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 261674c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 261774c551caSRussell King break; 261874c551caSRussell King } 2619d23751a0SRussell King sfp_sm_link_check_los(sfp); 2620d23751a0SRussell King 2621d23751a0SRussell King /* Reset the fault retry count */ 2622281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2623d23751a0SRussell King break; 2624d23751a0SRussell King 2625d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2626d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2627d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 262826c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2629d23751a0SRussell King } 263073970055SRussell King break; 263173970055SRussell King 263273970055SRussell King case SFP_S_WAIT_LOS: 263373970055SRussell King if (event == SFP_E_TX_FAULT) 263463ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2635710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 263673970055SRussell King sfp_sm_link_up(sfp); 263773970055SRussell King break; 263873970055SRussell King 263973970055SRussell King case SFP_S_LINK_UP: 264073970055SRussell King if (event == SFP_E_TX_FAULT) { 264173970055SRussell King sfp_sm_link_down(sfp); 264263ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2643710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 264473970055SRussell King sfp_sm_link_down(sfp); 264573970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 264673970055SRussell King } 264773970055SRussell King break; 264873970055SRussell King 264973970055SRussell King case SFP_S_TX_FAULT: 265073970055SRussell King if (event == SFP_E_TIMEOUT) { 265173970055SRussell King sfp_module_tx_fault_reset(sfp); 265226c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 265373970055SRussell King } 265473970055SRussell King break; 265573970055SRussell King 265673970055SRussell King case SFP_S_REINIT: 265773970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 265863ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 265973970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 266073970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 266173970055SRussell King sfp_sm_link_check_los(sfp); 266273970055SRussell King } 266373970055SRussell King break; 266473970055SRussell King 266573970055SRussell King case SFP_S_TX_DISABLE: 266673970055SRussell King break; 266773970055SRussell King } 2668e85d81a1SRussell King } 2669e85d81a1SRussell King 267097a49205SRussell King (Oracle) static void __sfp_sm_event(struct sfp *sfp, unsigned int event) 2671e85d81a1SRussell King { 2672e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2673e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2674e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2675e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2676e85d81a1SRussell King event_to_str(event)); 2677e85d81a1SRussell King 2678e85d81a1SRussell King sfp_sm_device(sfp, event); 26796b0da5c9SRussell King sfp_sm_module(sfp, event); 2680e85d81a1SRussell King sfp_sm_main(sfp, event); 268173970055SRussell King 26824005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 26834005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 26844005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 26854005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 268697a49205SRussell King (Oracle) } 268773970055SRussell King 268897a49205SRussell King (Oracle) static void sfp_sm_event(struct sfp *sfp, unsigned int event) 268997a49205SRussell King (Oracle) { 269097a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 269197a49205SRussell King (Oracle) __sfp_sm_event(sfp, event); 269273970055SRussell King mutex_unlock(&sfp->sm_mutex); 269373970055SRussell King } 269473970055SRussell King 2695b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2696b5bfc21aSRussell King { 26976b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2698b5bfc21aSRussell King } 2699b5bfc21aSRussell King 2700b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2701b5bfc21aSRussell King { 27026b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2703b5bfc21aSRussell King } 2704b5bfc21aSRussell King 270573970055SRussell King static void sfp_start(struct sfp *sfp) 270673970055SRussell King { 270773970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 270873970055SRussell King } 270973970055SRussell King 271073970055SRussell King static void sfp_stop(struct sfp *sfp) 271173970055SRussell King { 271273970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 271373970055SRussell King } 271473970055SRussell King 2715dc185822SRussell King (Oracle) static void sfp_set_signal_rate(struct sfp *sfp, unsigned int rate_kbd) 2716dc185822SRussell King (Oracle) { 2717fc082b39SRussell King (Oracle) unsigned int set; 2718fc082b39SRussell King (Oracle) 2719fc082b39SRussell King (Oracle) sfp->rate_kbd = rate_kbd; 2720fc082b39SRussell King (Oracle) 2721fc082b39SRussell King (Oracle) if (rate_kbd > sfp->rs_threshold_kbd) 2722fc082b39SRussell King (Oracle) set = sfp->rs_state_mask; 2723fc082b39SRussell King (Oracle) else 2724fc082b39SRussell King (Oracle) set = 0; 2725fc082b39SRussell King (Oracle) 2726fc082b39SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_RS0 | SFP_F_RS1, set); 2727dc185822SRussell King (Oracle) } 2728dc185822SRussell King (Oracle) 272973970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 273073970055SRussell King { 273173970055SRussell King /* locking... and check module is present */ 273273970055SRussell King 2733ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2734ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 273573970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 273673970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 273773970055SRussell King } else { 273873970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 273973970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 274073970055SRussell King } 274173970055SRussell King return 0; 274273970055SRussell King } 274373970055SRussell King 274473970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 274573970055SRussell King u8 *data) 274673970055SRussell King { 274773970055SRussell King unsigned int first, last, len; 274873970055SRussell King int ret; 274973970055SRussell King 2750bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2751bef227c1SIvan Bornyakov return -ENODEV; 2752bef227c1SIvan Bornyakov 275373970055SRussell King if (ee->len == 0) 275473970055SRussell King return -EINVAL; 275573970055SRussell King 275673970055SRussell King first = ee->offset; 275773970055SRussell King last = ee->offset + ee->len; 275873970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 275973970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 276073970055SRussell King len -= first; 276173970055SRussell King 27622794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 276373970055SRussell King if (ret < 0) 276473970055SRussell King return ret; 276573970055SRussell King 276673970055SRussell King first += len; 276773970055SRussell King data += len; 276873970055SRussell King } 27692794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 277073970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 277173970055SRussell King len -= first; 277273970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 277373970055SRussell King 27742794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 277573970055SRussell King if (ret < 0) 277673970055SRussell King return ret; 277773970055SRussell King } 277873970055SRussell King return 0; 277973970055SRussell King } 278073970055SRussell King 2781d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2782d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2783d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2784d740513fSAndrew Lunn { 2785bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2786bef227c1SIvan Bornyakov return -ENODEV; 2787bef227c1SIvan Bornyakov 2788d740513fSAndrew Lunn if (page->bank) { 2789d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2790d740513fSAndrew Lunn return -EOPNOTSUPP; 2791d740513fSAndrew Lunn } 2792d740513fSAndrew Lunn 2793d740513fSAndrew Lunn if (page->page) { 2794d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2795d740513fSAndrew Lunn return -EOPNOTSUPP; 2796d740513fSAndrew Lunn } 2797d740513fSAndrew Lunn 2798d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2799d740513fSAndrew Lunn page->i2c_address != 0x51) { 2800d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2801d740513fSAndrew Lunn return -EOPNOTSUPP; 2802d740513fSAndrew Lunn } 2803d740513fSAndrew Lunn 2804d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2805d740513fSAndrew Lunn page->data, page->length); 2806d740513fSAndrew Lunn }; 2807d740513fSAndrew Lunn 280873970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2809b5bfc21aSRussell King .attach = sfp_attach, 2810b5bfc21aSRussell King .detach = sfp_detach, 281173970055SRussell King .start = sfp_start, 281273970055SRussell King .stop = sfp_stop, 2813dc185822SRussell King (Oracle) .set_signal_rate = sfp_set_signal_rate, 281473970055SRussell King .module_info = sfp_module_info, 281573970055SRussell King .module_eeprom = sfp_module_eeprom, 2816d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 281773970055SRussell King }; 281873970055SRussell King 281973970055SRussell King static void sfp_timeout(struct work_struct *work) 282073970055SRussell King { 282173970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 282273970055SRussell King 282373970055SRussell King rtnl_lock(); 282473970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 282573970055SRussell King rtnl_unlock(); 282673970055SRussell King } 282773970055SRussell King 282873970055SRussell King static void sfp_check_state(struct sfp *sfp) 282973970055SRussell King { 283073970055SRussell King unsigned int state, i, changed; 283173970055SRussell King 2832d47e5a43SRussell King (Oracle) rtnl_lock(); 2833a9fe964eSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 283473970055SRussell King state = sfp_get_state(sfp); 283573970055SRussell King changed = state ^ sfp->state; 28362069624dSMatthew Hagan if (sfp->tx_fault_ignore) 28372069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 28382069624dSMatthew Hagan else 283973970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 284073970055SRussell King 284173970055SRussell King for (i = 0; i < GPIO_MAX; i++) 284273970055SRussell King if (changed & BIT(i)) 2843f35cb547SRussell King (Oracle) dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_names[i], 284473970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 284573970055SRussell King 2846fc082b39SRussell King (Oracle) state |= sfp->state & SFP_F_OUTPUTS; 284773970055SRussell King sfp->state = state; 28481974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 284973970055SRussell King 285097a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 285173970055SRussell King if (changed & SFP_F_PRESENT) 285297a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_PRESENT ? 285373970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 285473970055SRussell King 285573970055SRussell King if (changed & SFP_F_TX_FAULT) 285697a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 285773970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 285873970055SRussell King 285973970055SRussell King if (changed & SFP_F_LOS) 286097a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_LOS ? 286173970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 286297a49205SRussell King (Oracle) mutex_unlock(&sfp->sm_mutex); 2863a9fe964eSRussell King (Oracle) rtnl_unlock(); 286473970055SRussell King } 286573970055SRussell King 286673970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 286773970055SRussell King { 286873970055SRussell King struct sfp *sfp = data; 286973970055SRussell King 287073970055SRussell King sfp_check_state(sfp); 287173970055SRussell King 287273970055SRussell King return IRQ_HANDLED; 287373970055SRussell King } 287473970055SRussell King 287573970055SRussell King static void sfp_poll(struct work_struct *work) 287673970055SRussell King { 287773970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 287873970055SRussell King 287973970055SRussell King sfp_check_state(sfp); 2880f3c9a666SRussell King 28811974fd3bSRussell King (Oracle) // st_mutex doesn't need to be held here for state_soft_mask, 28821974fd3bSRussell King (Oracle) // it's unimportant if we race while reading this. 2883f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2884f3c9a666SRussell King sfp->need_poll) 288573970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 288673970055SRussell King } 288773970055SRussell King 288873970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 288973970055SRussell King { 289073970055SRussell King struct sfp *sfp; 289173970055SRussell King 289273970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 289373970055SRussell King if (!sfp) 289473970055SRussell King return ERR_PTR(-ENOMEM); 289573970055SRussell King 289673970055SRussell King sfp->dev = dev; 2897813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 289873970055SRussell King 289973970055SRussell King mutex_init(&sfp->sm_mutex); 29002158e856SRobert Hancock mutex_init(&sfp->st_mutex); 290173970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 290273970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 290373970055SRussell King 2904139d3a21SRussell King sfp_hwmon_init(sfp); 2905139d3a21SRussell King 290673970055SRussell King return sfp; 290773970055SRussell King } 290873970055SRussell King 290973970055SRussell King static void sfp_cleanup(void *data) 291073970055SRussell King { 291173970055SRussell King struct sfp *sfp = data; 291273970055SRussell King 2913139d3a21SRussell King sfp_hwmon_exit(sfp); 2914139d3a21SRussell King 291573970055SRussell King cancel_delayed_work_sync(&sfp->poll); 291673970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 291773970055SRussell King if (sfp->i2c_mii) { 291873970055SRussell King mdiobus_unregister(sfp->i2c_mii); 291973970055SRussell King mdiobus_free(sfp->i2c_mii); 292073970055SRussell King } 292173970055SRussell King if (sfp->i2c) 292273970055SRussell King i2c_put_adapter(sfp->i2c); 292373970055SRussell King kfree(sfp); 292473970055SRussell King } 292573970055SRussell King 292615309fb2SRussell King (Oracle) static int sfp_i2c_get(struct sfp *sfp) 292715309fb2SRussell King (Oracle) { 292815309fb2SRussell King (Oracle) struct fwnode_handle *h; 292915309fb2SRussell King (Oracle) struct i2c_adapter *i2c; 293015309fb2SRussell King (Oracle) int err; 293115309fb2SRussell King (Oracle) 293215309fb2SRussell King (Oracle) h = fwnode_find_reference(dev_fwnode(sfp->dev), "i2c-bus", 0); 293315309fb2SRussell King (Oracle) if (IS_ERR(h)) { 293415309fb2SRussell King (Oracle) dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 293515309fb2SRussell King (Oracle) return -ENODEV; 293615309fb2SRussell King (Oracle) } 293715309fb2SRussell King (Oracle) 2938ff31a0c4SRussell King (Oracle) i2c = i2c_get_adapter_by_fwnode(h); 293915309fb2SRussell King (Oracle) if (!i2c) { 294015309fb2SRussell King (Oracle) err = -EPROBE_DEFER; 294115309fb2SRussell King (Oracle) goto put; 294215309fb2SRussell King (Oracle) } 294315309fb2SRussell King (Oracle) 294415309fb2SRussell King (Oracle) err = sfp_i2c_configure(sfp, i2c); 294515309fb2SRussell King (Oracle) if (err) 294615309fb2SRussell King (Oracle) i2c_put_adapter(i2c); 294715309fb2SRussell King (Oracle) put: 294815309fb2SRussell King (Oracle) fwnode_handle_put(h); 294915309fb2SRussell King (Oracle) return err; 295015309fb2SRussell King (Oracle) } 295115309fb2SRussell King (Oracle) 295273970055SRussell King static int sfp_probe(struct platform_device *pdev) 295373970055SRussell King { 2954259c8618SRussell King const struct sff_data *sff; 29555411ca71SChris Healy char *sfp_irq_name; 295673970055SRussell King struct sfp *sfp; 2957257c2559SRobert Hancock int err, i; 295873970055SRussell King 295973970055SRussell King sfp = sfp_alloc(&pdev->dev); 296073970055SRussell King if (IS_ERR(sfp)) 296173970055SRussell King return PTR_ERR(sfp); 296273970055SRussell King 296373970055SRussell King platform_set_drvdata(pdev, sfp); 296473970055SRussell King 29650a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 296673970055SRussell King if (err < 0) 296773970055SRussell King return err; 296873970055SRussell King 2969b71dda81SRussell King (Oracle) sff = device_get_match_data(sfp->dev); 2970b71dda81SRussell King (Oracle) if (!sff) 2971b71dda81SRussell King (Oracle) sff = &sfp_data; 2972259c8618SRussell King 2973b71dda81SRussell King (Oracle) sfp->type = sff; 29747ce236faSRuslan Babayev 297515309fb2SRussell King (Oracle) err = sfp_i2c_get(sfp); 297615309fb2SRussell King (Oracle) if (err) 297773970055SRussell King return err; 297873970055SRussell King 2979259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2980259c8618SRussell King if (sff->gpios & BIT(i)) { 298173970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 2982f35cb547SRussell King (Oracle) gpio_names[i], gpio_flags[i]); 298373970055SRussell King if (IS_ERR(sfp->gpio[i])) 298473970055SRussell King return PTR_ERR(sfp->gpio[i]); 298573970055SRussell King } 298673970055SRussell King 29878475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 2988fc082b39SRussell King (Oracle) sfp->state_hw_drive = SFP_F_TX_DISABLE; 29898475c4b7SRussell King (Oracle) 299073970055SRussell King sfp->get_state = sfp_gpio_get_state; 299173970055SRussell King sfp->set_state = sfp_gpio_set_state; 2992259c8618SRussell King 2993259c8618SRussell King /* Modules that have no detect signal are always present */ 2994259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2995259c8618SRussell King sfp->get_state = sff_gpio_get_state; 299673970055SRussell King 29973bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 29983bb35261SJon Nettleton &sfp->max_power_mW); 299902eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 300002eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 300102eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 300202eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 30033bb35261SJon Nettleton sfp->max_power_mW = 1000; 300402eaf5a7SRussell King (Oracle) } 30053bb35261SJon Nettleton 30063bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 30073bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 30083bb35261SJon Nettleton 300973970055SRussell King /* Get the initial state, and always signal TX disable, 301073970055SRussell King * since the network interface will not be up. 301173970055SRussell King */ 301273970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 301373970055SRussell King 3014fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0] && 3015fc082b39SRussell King (Oracle) gpiod_get_value_cansleep(sfp->gpio[GPIO_RS0])) 3016fc082b39SRussell King (Oracle) sfp->state |= SFP_F_RS0; 301773970055SRussell King sfp_set_state(sfp, sfp->state); 301873970055SRussell King sfp_module_tx_disable(sfp); 301973f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 302073f5e847SRussell King rtnl_lock(); 302173f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 302273f5e847SRussell King rtnl_unlock(); 302373f5e847SRussell King } 302473970055SRussell King 302573970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 302673970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 302773970055SRussell King continue; 302873970055SRussell King 3029257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 303096216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 303196216181SYueHaibing sfp->gpio_irq[i] = 0; 3032f3c9a666SRussell King sfp->need_poll = true; 303373970055SRussell King continue; 303473970055SRussell King } 303573970055SRussell King 30365411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 30375411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 3038f35cb547SRussell King (Oracle) gpio_names[i]); 30395411ca71SChris Healy 30408cb601f1SChris Healy if (!sfp_irq_name) 30418cb601f1SChris Healy return -ENOMEM; 30428cb601f1SChris Healy 3043257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 3044257c2559SRobert Hancock NULL, sfp_irq, 304573970055SRussell King IRQF_ONESHOT | 304673970055SRussell King IRQF_TRIGGER_RISING | 304773970055SRussell King IRQF_TRIGGER_FALLING, 30485411ca71SChris Healy sfp_irq_name, sfp); 3049257c2559SRobert Hancock if (err) { 3050257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 3051f3c9a666SRussell King sfp->need_poll = true; 305273970055SRussell King } 3053257c2559SRobert Hancock } 305473970055SRussell King 3055f3c9a666SRussell King if (sfp->need_poll) 305673970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 305773970055SRussell King 3058a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 3059a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 3060a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 3061a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 3062a1f5d1f0SAntoine Tenart */ 3063a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 3064a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 3065a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 3066a1f5d1f0SAntoine Tenart 3067b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 3068b5bfc21aSRussell King if (!sfp->sfp_bus) 3069b5bfc21aSRussell King return -ENOMEM; 3070b5bfc21aSRussell King 30719cc8976cSRussell King sfp_debugfs_init(sfp); 30729cc8976cSRussell King 307373970055SRussell King return 0; 307473970055SRussell King } 307573970055SRussell King 307673970055SRussell King static int sfp_remove(struct platform_device *pdev) 307773970055SRussell King { 307873970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 307973970055SRussell King 30809cc8976cSRussell King sfp_debugfs_exit(sfp); 308173970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 308273970055SRussell King 30830cb96b57SRussell King rtnl_lock(); 30840cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 30850cb96b57SRussell King rtnl_unlock(); 30860cb96b57SRussell King 308773970055SRussell King return 0; 308873970055SRussell King } 308973970055SRussell King 3090257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 3091257c2559SRobert Hancock { 3092257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 3093257c2559SRobert Hancock int i; 3094257c2559SRobert Hancock 3095257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 3096257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 3097257c2559SRobert Hancock continue; 3098257c2559SRobert Hancock 3099257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 3100257c2559SRobert Hancock } 3101257c2559SRobert Hancock 3102257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 3103257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 3104257c2559SRobert Hancock } 3105257c2559SRobert Hancock 310673970055SRussell King static struct platform_driver sfp_driver = { 310773970055SRussell King .probe = sfp_probe, 310873970055SRussell King .remove = sfp_remove, 3109257c2559SRobert Hancock .shutdown = sfp_shutdown, 311073970055SRussell King .driver = { 311173970055SRussell King .name = "sfp", 311273970055SRussell King .of_match_table = sfp_of_match, 311373970055SRussell King }, 311473970055SRussell King }; 311573970055SRussell King 311673970055SRussell King static int sfp_init(void) 311773970055SRussell King { 311873970055SRussell King poll_jiffies = msecs_to_jiffies(100); 311973970055SRussell King 312073970055SRussell King return platform_driver_register(&sfp_driver); 312173970055SRussell King } 312273970055SRussell King module_init(sfp_init); 312373970055SRussell King 312473970055SRussell King static void sfp_exit(void) 312573970055SRussell King { 312673970055SRussell King platform_driver_unregister(&sfp_driver); 312773970055SRussell King } 312873970055SRussell King module_exit(sfp_exit); 312973970055SRussell King 313073970055SRussell King MODULE_ALIAS("platform:sfp"); 313173970055SRussell King MODULE_AUTHOR("Russell King"); 313273970055SRussell King MODULE_LICENSE("GPL v2"); 3133