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) 455*994f77f3SChristian Marangi // Fiberstore GPON-ONU-34-20BI can operate at 2500base-X, but report 1.2GBd 456*994f77f3SChristian Marangi // NRZ in their EEPROM 457*994f77f3SChristian Marangi SFP_QUIRK("FS", "GPON-ONU-34-20BI", sfp_quirk_2500basex, 458*994f77f3SChristian Marangi sfp_fixup_ignore_tx_fault), 459*994f77f3SChristian Marangi 46013c8adcfSMarek Behún SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp), 46113c8adcfSMarek Behún 462ad651d68SDaniel Golle // HG MXPD-483II-F 2.5G supports 2500Base-X, but incorrectly reports 463ad651d68SDaniel Golle // 2600MBd in their EERPOM 464ad651d68SDaniel Golle SFP_QUIRK_M("HG GENUINE", "MXPD-483II", sfp_quirk_2500basex), 465ad651d68SDaniel Golle 46613c8adcfSMarek Behún // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in 46713c8adcfSMarek Behún // their EEPROM 46813c8adcfSMarek Behún SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex, 46913c8adcfSMarek Behún sfp_fixup_ignore_tx_fault), 47013c8adcfSMarek Behún 47113c8adcfSMarek Behún // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report 47213c8adcfSMarek Behún // 2500MBd NRZ in their EEPROM 47313c8adcfSMarek Behún SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex), 47413c8adcfSMarek Behún 47513c8adcfSMarek Behún SFP_QUIRK_M("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant), 476324e88cbSMarek Behún 477ac2e8e3cSJosua Mayer // Walsun HXSX-ATR[CI]-1 don't identify as copper, and use the 4785859a99bSRussell King (Oracle) // Rollball protocol to talk to the PHY. 4795859a99bSRussell King (Oracle) SFP_QUIRK_F("Walsun", "HXSX-ATRC-1", sfp_fixup_fs_10gt), 480ac2e8e3cSJosua Mayer SFP_QUIRK_F("Walsun", "HXSX-ATRI-1", sfp_fixup_fs_10gt), 4815859a99bSRussell King (Oracle) 482324e88cbSMarek Behún SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc), 48350e96acbSRussell King (Oracle) SFP_QUIRK_M("OEM", "SFP-2.5G-T", sfp_quirk_oem_2_5g), 484324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc), 485324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc), 486324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), 487324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), 48823571c7bSRussell King (Oracle) }; 48923571c7bSRussell King (Oracle) 49023571c7bSRussell King (Oracle) static size_t sfp_strlen(const char *str, size_t maxlen) 49123571c7bSRussell King (Oracle) { 49223571c7bSRussell King (Oracle) size_t size, i; 49323571c7bSRussell King (Oracle) 49473472c83SRussell King (Oracle) /* Trailing characters should be filled with space chars, but 49573472c83SRussell King (Oracle) * some manufacturers can't read SFF-8472 and use NUL. 49673472c83SRussell King (Oracle) */ 49723571c7bSRussell King (Oracle) for (i = 0, size = 0; i < maxlen; i++) 49873472c83SRussell King (Oracle) if (str[i] != ' ' && str[i] != '\0') 49923571c7bSRussell King (Oracle) size = i + 1; 50023571c7bSRussell King (Oracle) 50123571c7bSRussell King (Oracle) return size; 50223571c7bSRussell King (Oracle) } 50323571c7bSRussell King (Oracle) 50423571c7bSRussell King (Oracle) static bool sfp_match(const char *qs, const char *str, size_t len) 50523571c7bSRussell King (Oracle) { 50623571c7bSRussell King (Oracle) if (!qs) 50723571c7bSRussell King (Oracle) return true; 50823571c7bSRussell King (Oracle) if (strlen(qs) != len) 50923571c7bSRussell King (Oracle) return false; 51023571c7bSRussell King (Oracle) return !strncmp(qs, str, len); 51123571c7bSRussell King (Oracle) } 51223571c7bSRussell King (Oracle) 51323571c7bSRussell King (Oracle) static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) 51423571c7bSRussell King (Oracle) { 51523571c7bSRussell King (Oracle) const struct sfp_quirk *q; 51623571c7bSRussell King (Oracle) unsigned int i; 51723571c7bSRussell King (Oracle) size_t vs, ps; 51823571c7bSRussell King (Oracle) 51923571c7bSRussell King (Oracle) vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); 52023571c7bSRussell King (Oracle) ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); 52123571c7bSRussell King (Oracle) 52223571c7bSRussell King (Oracle) for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) 52323571c7bSRussell King (Oracle) if (sfp_match(q->vendor, id->base.vendor_name, vs) && 52423571c7bSRussell King (Oracle) sfp_match(q->part, id->base.vendor_pn, ps)) 52523571c7bSRussell King (Oracle) return q; 52623571c7bSRussell King (Oracle) 52723571c7bSRussell King (Oracle) return NULL; 52823571c7bSRussell King (Oracle) } 52923571c7bSRussell King (Oracle) 53073970055SRussell King static unsigned long poll_jiffies; 53173970055SRussell King 53273970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 53373970055SRussell King { 53473970055SRussell King unsigned int i, state, v; 53573970055SRussell King 53673970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 53773970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 53873970055SRussell King continue; 53973970055SRussell King 54073970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 54173970055SRussell King if (v) 54273970055SRussell King state |= BIT(i); 54373970055SRussell King } 54473970055SRussell King 54573970055SRussell King return state; 54673970055SRussell King } 54773970055SRussell King 548259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 549259c8618SRussell King { 550259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 551259c8618SRussell King } 552259c8618SRussell King 55373970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 55473970055SRussell King { 555fc082b39SRussell King (Oracle) unsigned int drive; 556fc082b39SRussell King (Oracle) 557fc082b39SRussell King (Oracle) if (state & SFP_F_PRESENT) 558fc082b39SRussell King (Oracle) /* If the module is present, drive the requested signals */ 559fc082b39SRussell King (Oracle) drive = sfp->state_hw_drive; 560fc082b39SRussell King (Oracle) else 561fc082b39SRussell King (Oracle) /* Otherwise, let them float to the pull-ups */ 562fc082b39SRussell King (Oracle) drive = 0; 563fc082b39SRussell King (Oracle) 564fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) { 565fc082b39SRussell King (Oracle) if (drive & SFP_F_TX_DISABLE) 56673970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 56773970055SRussell King state & SFP_F_TX_DISABLE); 568fc082b39SRussell King (Oracle) else 56973970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 570fc082b39SRussell King (Oracle) } 571fc082b39SRussell King (Oracle) 572fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0]) { 573fc082b39SRussell King (Oracle) if (drive & SFP_F_RS0) 574fc082b39SRussell King (Oracle) gpiod_direction_output(sfp->gpio[GPIO_RS0], 575fc082b39SRussell King (Oracle) state & SFP_F_RS0); 576fc082b39SRussell King (Oracle) else 577fc082b39SRussell King (Oracle) gpiod_direction_input(sfp->gpio[GPIO_RS0]); 578fc082b39SRussell King (Oracle) } 579fc082b39SRussell King (Oracle) 580fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS1]) { 581fc082b39SRussell King (Oracle) if (drive & SFP_F_RS1) 582fc082b39SRussell King (Oracle) gpiod_direction_output(sfp->gpio[GPIO_RS1], 583fc082b39SRussell King (Oracle) state & SFP_F_RS1); 584fc082b39SRussell King (Oracle) else 585fc082b39SRussell King (Oracle) gpiod_direction_input(sfp->gpio[GPIO_RS1]); 58673970055SRussell King } 58773970055SRussell King } 58873970055SRussell King 5893bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 5903bb35261SJon Nettleton size_t len) 59173970055SRussell King { 59273970055SRussell King struct i2c_msg msgs[2]; 593426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 594426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 59528e74a7cSRussell King size_t this_len; 59673970055SRussell King int ret; 59773970055SRussell King 59873970055SRussell King msgs[0].addr = bus_addr; 59973970055SRussell King msgs[0].flags = 0; 60073970055SRussell King msgs[0].len = 1; 60173970055SRussell King msgs[0].buf = &dev_addr; 60273970055SRussell King msgs[1].addr = bus_addr; 60373970055SRussell King msgs[1].flags = I2C_M_RD; 60473970055SRussell King msgs[1].len = len; 60573970055SRussell King msgs[1].buf = buf; 60673970055SRussell King 60728e74a7cSRussell King while (len) { 60828e74a7cSRussell King this_len = len; 6090d035bedSRussell King if (this_len > block_size) 6100d035bedSRussell King this_len = block_size; 61128e74a7cSRussell King 61228e74a7cSRussell King msgs[1].len = this_len; 61328e74a7cSRussell King 6143bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 61573970055SRussell King if (ret < 0) 61673970055SRussell King return ret; 61773970055SRussell King 61828e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 61928e74a7cSRussell King break; 62028e74a7cSRussell King 62128e74a7cSRussell King msgs[1].buf += this_len; 62228e74a7cSRussell King dev_addr += this_len; 62328e74a7cSRussell King len -= this_len; 62428e74a7cSRussell King } 62528e74a7cSRussell King 62628e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 62773970055SRussell King } 62873970055SRussell King 6293bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 63073970055SRussell King size_t len) 63173970055SRussell King { 6323bb35261SJon Nettleton struct i2c_msg msgs[1]; 6333bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 6343bb35261SJon Nettleton int ret; 6353bb35261SJon Nettleton 6363bb35261SJon Nettleton msgs[0].addr = bus_addr; 6373bb35261SJon Nettleton msgs[0].flags = 0; 6383bb35261SJon Nettleton msgs[0].len = 1 + len; 6393bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 6403bb35261SJon Nettleton if (!msgs[0].buf) 6413bb35261SJon Nettleton return -ENOMEM; 6423bb35261SJon Nettleton 6433bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 6443bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 6453bb35261SJon Nettleton 6463bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 6473bb35261SJon Nettleton 6483bb35261SJon Nettleton kfree(msgs[0].buf); 6493bb35261SJon Nettleton 6503bb35261SJon Nettleton if (ret < 0) 6513bb35261SJon Nettleton return ret; 6523bb35261SJon Nettleton 6533bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 65473970055SRussell King } 65573970055SRussell King 65673970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 65773970055SRussell King { 65873970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 65973970055SRussell King return -EINVAL; 66073970055SRussell King 66173970055SRussell King sfp->i2c = i2c; 66273970055SRussell King sfp->read = sfp_i2c_read; 6633bb35261SJon Nettleton sfp->write = sfp_i2c_write; 66473970055SRussell King 665e85b1347SMarek Behún return 0; 666e85b1347SMarek Behún } 667e85b1347SMarek Behún 668e85b1347SMarek Behún static int sfp_i2c_mdiobus_create(struct sfp *sfp) 669e85b1347SMarek Behún { 670e85b1347SMarek Behún struct mii_bus *i2c_mii; 671e85b1347SMarek Behún int ret; 672e85b1347SMarek Behún 67309bbedacSMarek Behún i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, sfp->mdio_protocol); 67473970055SRussell King if (IS_ERR(i2c_mii)) 67573970055SRussell King return PTR_ERR(i2c_mii); 67673970055SRussell King 67773970055SRussell King i2c_mii->name = "SFP I2C Bus"; 67873970055SRussell King i2c_mii->phy_mask = ~0; 67973970055SRussell King 68073970055SRussell King ret = mdiobus_register(i2c_mii); 68173970055SRussell King if (ret < 0) { 68273970055SRussell King mdiobus_free(i2c_mii); 68373970055SRussell King return ret; 68473970055SRussell King } 68573970055SRussell King 68673970055SRussell King sfp->i2c_mii = i2c_mii; 68773970055SRussell King 68873970055SRussell King return 0; 68973970055SRussell King } 69073970055SRussell King 691e85b1347SMarek Behún static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) 692e85b1347SMarek Behún { 693e85b1347SMarek Behún mdiobus_unregister(sfp->i2c_mii); 694e85b1347SMarek Behún sfp->i2c_mii = NULL; 695e85b1347SMarek Behún } 696e85b1347SMarek Behún 69773970055SRussell King /* Interface */ 69873970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 69973970055SRussell King { 70073970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 70173970055SRussell King } 70273970055SRussell King 7033bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 7043bb35261SJon Nettleton { 7053bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 7063bb35261SJon Nettleton } 7073bb35261SJon Nettleton 708a3c536fcSRussell King (Oracle) static int sfp_modify_u8(struct sfp *sfp, bool a2, u8 addr, u8 mask, u8 val) 709a3c536fcSRussell King (Oracle) { 710a3c536fcSRussell King (Oracle) int ret; 711a3c536fcSRussell King (Oracle) u8 old, v; 712a3c536fcSRussell King (Oracle) 713a3c536fcSRussell King (Oracle) ret = sfp_read(sfp, a2, addr, &old, sizeof(old)); 714a3c536fcSRussell King (Oracle) if (ret != sizeof(old)) 715a3c536fcSRussell King (Oracle) return ret; 716a3c536fcSRussell King (Oracle) 717a3c536fcSRussell King (Oracle) v = (old & ~mask) | (val & mask); 718a3c536fcSRussell King (Oracle) if (v == old) 719a3c536fcSRussell King (Oracle) return sizeof(v); 720a3c536fcSRussell King (Oracle) 721a3c536fcSRussell King (Oracle) return sfp_write(sfp, a2, addr, &v, sizeof(v)); 722a3c536fcSRussell King (Oracle) } 723a3c536fcSRussell King (Oracle) 724f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 725f3c9a666SRussell King { 726f3c9a666SRussell King unsigned int state = 0; 727f3c9a666SRussell King u8 status; 7280dea4d03SRussell King int ret; 729f3c9a666SRussell King 7300dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 7310dea4d03SRussell King if (ret == sizeof(status)) { 732f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 733f3c9a666SRussell King state |= SFP_F_LOS; 734f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 735f3c9a666SRussell King state |= SFP_F_TX_FAULT; 7360dea4d03SRussell King } else { 7370dea4d03SRussell King dev_err_ratelimited(sfp->dev, 7389ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 7399ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 7400dea4d03SRussell King /* Preserve the current state */ 7410dea4d03SRussell King state = sfp->state; 742f3c9a666SRussell King } 743f3c9a666SRussell King 744f3c9a666SRussell King return state & sfp->state_soft_mask; 745f3c9a666SRussell King } 746f3c9a666SRussell King 747fc082b39SRussell King (Oracle) static void sfp_soft_set_state(struct sfp *sfp, unsigned int state, 748fc082b39SRussell King (Oracle) unsigned int soft) 749f3c9a666SRussell King { 750fc082b39SRussell King (Oracle) u8 mask = 0; 751a3c536fcSRussell King (Oracle) u8 val = 0; 752f3c9a666SRussell King 753fc082b39SRussell King (Oracle) if (soft & SFP_F_TX_DISABLE) 754fc082b39SRussell King (Oracle) mask |= SFP_STATUS_TX_DISABLE_FORCE; 755f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 756a3c536fcSRussell King (Oracle) val |= SFP_STATUS_TX_DISABLE_FORCE; 757f3c9a666SRussell King 758fc082b39SRussell King (Oracle) if (soft & SFP_F_RS0) 759fc082b39SRussell King (Oracle) mask |= SFP_STATUS_RS0_SELECT; 760fc082b39SRussell King (Oracle) if (state & SFP_F_RS0) 761fc082b39SRussell King (Oracle) val |= SFP_STATUS_RS0_SELECT; 762a3c536fcSRussell King (Oracle) 763fc082b39SRussell King (Oracle) if (mask) 764a3c536fcSRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); 765fc082b39SRussell King (Oracle) 766fc082b39SRussell King (Oracle) val = mask = 0; 767fc082b39SRussell King (Oracle) if (soft & SFP_F_RS1) 768fc082b39SRussell King (Oracle) mask |= SFP_EXT_STATUS_RS1_SELECT; 769fc082b39SRussell King (Oracle) if (state & SFP_F_RS1) 770fc082b39SRussell King (Oracle) val |= SFP_EXT_STATUS_RS1_SELECT; 771fc082b39SRussell King (Oracle) 772fc082b39SRussell King (Oracle) if (mask) 773fc082b39SRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_EXT_STATUS, mask, val); 774f3c9a666SRussell King } 775f3c9a666SRussell King 776f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 777f3c9a666SRussell King { 778f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 7798475c4b7SRussell King (Oracle) unsigned int mask = 0; 780f3c9a666SRussell King 7818475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 7828475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 7838475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 7848475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 7858475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 7868475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 787fc082b39SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RATE_SELECT) 788fc082b39SRussell King (Oracle) mask |= sfp->rs_state_mask; 7898475c4b7SRussell King (Oracle) 7901974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 7918475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 7928475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 793f3c9a666SRussell King 794f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 795f3c9a666SRussell King !sfp->need_poll) 796f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 7971974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 798f3c9a666SRussell King } 799f3c9a666SRussell King 800f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 801f3c9a666SRussell King { 8021974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 803f3c9a666SRussell King sfp->state_soft_mask = 0; 8041974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 805f3c9a666SRussell King } 806f3c9a666SRussell King 8071974fd3bSRussell King (Oracle) /* sfp_get_state() - must be called with st_mutex held, or in the 8081974fd3bSRussell King (Oracle) * initialisation path. 8091974fd3bSRussell King (Oracle) */ 810f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 811f3c9a666SRussell King { 8128475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 8138475c4b7SRussell King (Oracle) unsigned int state; 814f3c9a666SRussell King 8158475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 8168475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 817f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 818f3c9a666SRussell King 819f3c9a666SRussell King return state; 820f3c9a666SRussell King } 821f3c9a666SRussell King 8221974fd3bSRussell King (Oracle) /* sfp_set_state() - must be called with st_mutex held, or in the 8231974fd3bSRussell King (Oracle) * initialisation path. 8241974fd3bSRussell King (Oracle) */ 825f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 826f3c9a666SRussell King { 827fc082b39SRussell King (Oracle) unsigned int soft; 828fc082b39SRussell King (Oracle) 829f3c9a666SRussell King sfp->set_state(sfp, state); 830f3c9a666SRussell King 831fc082b39SRussell King (Oracle) soft = sfp->state_soft_mask & SFP_F_OUTPUTS; 832fc082b39SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 833fc082b39SRussell King (Oracle) sfp_soft_set_state(sfp, state, soft); 834f3c9a666SRussell King } 835f3c9a666SRussell King 836418c1214SRussell King (Oracle) static void sfp_mod_state(struct sfp *sfp, unsigned int mask, unsigned int set) 837418c1214SRussell King (Oracle) { 8381974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 839418c1214SRussell King (Oracle) sfp->state = (sfp->state & ~mask) | set; 840418c1214SRussell King (Oracle) sfp_set_state(sfp, sfp->state); 8411974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 842418c1214SRussell King (Oracle) } 843418c1214SRussell King (Oracle) 84473970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 84573970055SRussell King { 84673970055SRussell King u8 *p, check; 84773970055SRussell King 84873970055SRussell King for (p = buf, check = 0; len; p++, len--) 84973970055SRussell King check += *p; 85073970055SRussell King 85173970055SRussell King return check; 85273970055SRussell King } 85373970055SRussell King 8541323061aSAndrew Lunn /* hwmon */ 8551323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 8561323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 8571323061aSAndrew Lunn enum hwmon_sensor_types type, 8581323061aSAndrew Lunn u32 attr, int channel) 8591323061aSAndrew Lunn { 8601323061aSAndrew Lunn const struct sfp *sfp = data; 8611323061aSAndrew Lunn 8621323061aSAndrew Lunn switch (type) { 8631323061aSAndrew Lunn case hwmon_temp: 8641323061aSAndrew Lunn switch (attr) { 8651323061aSAndrew Lunn case hwmon_temp_min_alarm: 8661323061aSAndrew Lunn case hwmon_temp_max_alarm: 8671323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 8681323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8691323061aSAndrew Lunn case hwmon_temp_min: 8701323061aSAndrew Lunn case hwmon_temp_max: 8711323061aSAndrew Lunn case hwmon_temp_lcrit: 8721323061aSAndrew Lunn case hwmon_temp_crit: 873a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 874a33710bdSAndrew Lunn return 0; 875df561f66SGustavo A. R. Silva fallthrough; 876a33710bdSAndrew Lunn case hwmon_temp_input: 877c1236979SAndrew Lunn case hwmon_temp_label: 8781323061aSAndrew Lunn return 0444; 8791323061aSAndrew Lunn default: 8801323061aSAndrew Lunn return 0; 8811323061aSAndrew Lunn } 8821323061aSAndrew Lunn case hwmon_in: 8831323061aSAndrew Lunn switch (attr) { 8841323061aSAndrew Lunn case hwmon_in_min_alarm: 8851323061aSAndrew Lunn case hwmon_in_max_alarm: 8861323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8871323061aSAndrew Lunn case hwmon_in_crit_alarm: 8881323061aSAndrew Lunn case hwmon_in_min: 8891323061aSAndrew Lunn case hwmon_in_max: 8901323061aSAndrew Lunn case hwmon_in_lcrit: 8911323061aSAndrew Lunn case hwmon_in_crit: 892a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 893a33710bdSAndrew Lunn return 0; 894df561f66SGustavo A. R. Silva fallthrough; 895a33710bdSAndrew Lunn case hwmon_in_input: 896c1236979SAndrew Lunn case hwmon_in_label: 8971323061aSAndrew Lunn return 0444; 8981323061aSAndrew Lunn default: 8991323061aSAndrew Lunn return 0; 9001323061aSAndrew Lunn } 9011323061aSAndrew Lunn case hwmon_curr: 9021323061aSAndrew Lunn switch (attr) { 9031323061aSAndrew Lunn case hwmon_curr_min_alarm: 9041323061aSAndrew Lunn case hwmon_curr_max_alarm: 9051323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9061323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9071323061aSAndrew Lunn case hwmon_curr_min: 9081323061aSAndrew Lunn case hwmon_curr_max: 9091323061aSAndrew Lunn case hwmon_curr_lcrit: 9101323061aSAndrew Lunn case hwmon_curr_crit: 911a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 912a33710bdSAndrew Lunn return 0; 913df561f66SGustavo A. R. Silva fallthrough; 914a33710bdSAndrew Lunn case hwmon_curr_input: 915c1236979SAndrew Lunn case hwmon_curr_label: 9161323061aSAndrew Lunn return 0444; 9171323061aSAndrew Lunn default: 9181323061aSAndrew Lunn return 0; 9191323061aSAndrew Lunn } 9201323061aSAndrew Lunn case hwmon_power: 9211323061aSAndrew Lunn /* External calibration of receive power requires 9221323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 9231323061aSAndrew Lunn * is not easy, so just skip it. If the module does 9241323061aSAndrew Lunn * not require external calibration, we can however 9251323061aSAndrew Lunn * show receiver power, since FP is then not needed. 9261323061aSAndrew Lunn */ 9271323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 9281323061aSAndrew Lunn channel == 1) 9291323061aSAndrew Lunn return 0; 9301323061aSAndrew Lunn switch (attr) { 9311323061aSAndrew Lunn case hwmon_power_min_alarm: 9321323061aSAndrew Lunn case hwmon_power_max_alarm: 9331323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9341323061aSAndrew Lunn case hwmon_power_crit_alarm: 9351323061aSAndrew Lunn case hwmon_power_min: 9361323061aSAndrew Lunn case hwmon_power_max: 9371323061aSAndrew Lunn case hwmon_power_lcrit: 9381323061aSAndrew Lunn case hwmon_power_crit: 939a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 940a33710bdSAndrew Lunn return 0; 941df561f66SGustavo A. R. Silva fallthrough; 942a33710bdSAndrew Lunn case hwmon_power_input: 943c1236979SAndrew Lunn case hwmon_power_label: 9441323061aSAndrew Lunn return 0444; 9451323061aSAndrew Lunn default: 9461323061aSAndrew Lunn return 0; 9471323061aSAndrew Lunn } 9481323061aSAndrew Lunn default: 9491323061aSAndrew Lunn return 0; 9501323061aSAndrew Lunn } 9511323061aSAndrew Lunn } 9521323061aSAndrew Lunn 9531323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 9541323061aSAndrew Lunn { 9551323061aSAndrew Lunn __be16 val; 9561323061aSAndrew Lunn int err; 9571323061aSAndrew Lunn 9581323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 9591323061aSAndrew Lunn if (err < 0) 9601323061aSAndrew Lunn return err; 9611323061aSAndrew Lunn 9621323061aSAndrew Lunn *value = be16_to_cpu(val); 9631323061aSAndrew Lunn 9641323061aSAndrew Lunn return 0; 9651323061aSAndrew Lunn } 9661323061aSAndrew Lunn 9671323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 9681323061aSAndrew Lunn { 9690cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9701323061aSAndrew Lunn } 9711323061aSAndrew Lunn 9721323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 9731323061aSAndrew Lunn long *value) 9741323061aSAndrew Lunn { 9751323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 9761323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 9771323061aSAndrew Lunn } 9781323061aSAndrew Lunn 9791323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 9801323061aSAndrew Lunn { 9811323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 9821323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 9831323061aSAndrew Lunn 9841323061aSAndrew Lunn if (*value >= 0x8000) 9851323061aSAndrew Lunn *value -= 0x10000; 9861323061aSAndrew Lunn 9871323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 9881323061aSAndrew Lunn } 9891323061aSAndrew Lunn 9901323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 9911323061aSAndrew Lunn { 9921323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 9931323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 9941323061aSAndrew Lunn 9951323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9961323061aSAndrew Lunn } 9971323061aSAndrew Lunn 9981323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 9991323061aSAndrew Lunn { 10001323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 10011323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 10021323061aSAndrew Lunn 10031323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 10041323061aSAndrew Lunn } 10051323061aSAndrew Lunn 10061323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 10071323061aSAndrew Lunn { 10081323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 10091323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 10101323061aSAndrew Lunn 10111323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 10121323061aSAndrew Lunn } 10131323061aSAndrew Lunn 10141323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 10151323061aSAndrew Lunn { 10161323061aSAndrew Lunn int err; 10171323061aSAndrew Lunn 10181323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10191323061aSAndrew Lunn if (err < 0) 10201323061aSAndrew Lunn return err; 10211323061aSAndrew Lunn 10221323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10231323061aSAndrew Lunn 10241323061aSAndrew Lunn return 0; 10251323061aSAndrew Lunn } 10261323061aSAndrew Lunn 10271323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 10281323061aSAndrew Lunn { 10291323061aSAndrew Lunn int err; 10301323061aSAndrew Lunn 10311323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10321323061aSAndrew Lunn if (err < 0) 10331323061aSAndrew Lunn return err; 10341323061aSAndrew Lunn 10351323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10361323061aSAndrew Lunn 10371323061aSAndrew Lunn return 0; 10381323061aSAndrew Lunn } 10391323061aSAndrew Lunn 10401323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 10411323061aSAndrew Lunn { 10421323061aSAndrew Lunn int err; 10431323061aSAndrew Lunn 10441323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10451323061aSAndrew Lunn if (err < 0) 10461323061aSAndrew Lunn return err; 10471323061aSAndrew Lunn 10481323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10491323061aSAndrew Lunn 10501323061aSAndrew Lunn return 0; 10511323061aSAndrew Lunn } 10521323061aSAndrew Lunn 10531323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 10541323061aSAndrew Lunn { 10551323061aSAndrew Lunn int err; 10561323061aSAndrew Lunn 10571323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10581323061aSAndrew Lunn if (err < 0) 10591323061aSAndrew Lunn return err; 10601323061aSAndrew Lunn 10611323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10621323061aSAndrew Lunn 10631323061aSAndrew Lunn return 0; 10641323061aSAndrew Lunn } 10651323061aSAndrew Lunn 10661323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 10671323061aSAndrew Lunn { 10681323061aSAndrew Lunn int err; 10691323061aSAndrew Lunn 10701323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 10711323061aSAndrew Lunn if (err < 0) 10721323061aSAndrew Lunn return err; 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10751323061aSAndrew Lunn 10761323061aSAndrew Lunn return 0; 10771323061aSAndrew Lunn } 10781323061aSAndrew Lunn 10791323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 10801323061aSAndrew Lunn { 10811323061aSAndrew Lunn u8 status; 10821323061aSAndrew Lunn int err; 10831323061aSAndrew Lunn 10841323061aSAndrew Lunn switch (attr) { 10851323061aSAndrew Lunn case hwmon_temp_input: 10861323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 10871323061aSAndrew Lunn 10881323061aSAndrew Lunn case hwmon_temp_lcrit: 10891323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 10901323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10911323061aSAndrew Lunn return 0; 10921323061aSAndrew Lunn 10931323061aSAndrew Lunn case hwmon_temp_min: 10941323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 10951323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10961323061aSAndrew Lunn return 0; 10971323061aSAndrew Lunn case hwmon_temp_max: 10981323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 10991323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 11001323061aSAndrew Lunn return 0; 11011323061aSAndrew Lunn 11021323061aSAndrew Lunn case hwmon_temp_crit: 11031323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 11041323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 11051323061aSAndrew Lunn return 0; 11061323061aSAndrew Lunn 11071323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 11081323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11091323061aSAndrew Lunn if (err < 0) 11101323061aSAndrew Lunn return err; 11111323061aSAndrew Lunn 11121323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 11131323061aSAndrew Lunn return 0; 11141323061aSAndrew Lunn 11151323061aSAndrew Lunn case hwmon_temp_min_alarm: 11161323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11171323061aSAndrew Lunn if (err < 0) 11181323061aSAndrew Lunn return err; 11191323061aSAndrew Lunn 11201323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 11211323061aSAndrew Lunn return 0; 11221323061aSAndrew Lunn 11231323061aSAndrew Lunn case hwmon_temp_max_alarm: 11241323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11251323061aSAndrew Lunn if (err < 0) 11261323061aSAndrew Lunn return err; 11271323061aSAndrew Lunn 11281323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 11291323061aSAndrew Lunn return 0; 11301323061aSAndrew Lunn 11311323061aSAndrew Lunn case hwmon_temp_crit_alarm: 11321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11331323061aSAndrew Lunn if (err < 0) 11341323061aSAndrew Lunn return err; 11351323061aSAndrew Lunn 11361323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 11371323061aSAndrew Lunn return 0; 11381323061aSAndrew Lunn default: 11391323061aSAndrew Lunn return -EOPNOTSUPP; 11401323061aSAndrew Lunn } 11411323061aSAndrew Lunn 11421323061aSAndrew Lunn return -EOPNOTSUPP; 11431323061aSAndrew Lunn } 11441323061aSAndrew Lunn 11451323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 11461323061aSAndrew Lunn { 11471323061aSAndrew Lunn u8 status; 11481323061aSAndrew Lunn int err; 11491323061aSAndrew Lunn 11501323061aSAndrew Lunn switch (attr) { 11511323061aSAndrew Lunn case hwmon_in_input: 11521323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 11531323061aSAndrew Lunn 11541323061aSAndrew Lunn case hwmon_in_lcrit: 11551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 11561323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11571323061aSAndrew Lunn return 0; 11581323061aSAndrew Lunn 11591323061aSAndrew Lunn case hwmon_in_min: 11601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 11611323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11621323061aSAndrew Lunn return 0; 11631323061aSAndrew Lunn 11641323061aSAndrew Lunn case hwmon_in_max: 11651323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 11661323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11671323061aSAndrew Lunn return 0; 11681323061aSAndrew Lunn 11691323061aSAndrew Lunn case hwmon_in_crit: 11701323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 11711323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 11721323061aSAndrew Lunn return 0; 11731323061aSAndrew Lunn 11741323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 11751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11761323061aSAndrew Lunn if (err < 0) 11771323061aSAndrew Lunn return err; 11781323061aSAndrew Lunn 11791323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 11801323061aSAndrew Lunn return 0; 11811323061aSAndrew Lunn 11821323061aSAndrew Lunn case hwmon_in_min_alarm: 11831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11841323061aSAndrew Lunn if (err < 0) 11851323061aSAndrew Lunn return err; 11861323061aSAndrew Lunn 11871323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 11881323061aSAndrew Lunn return 0; 11891323061aSAndrew Lunn 11901323061aSAndrew Lunn case hwmon_in_max_alarm: 11911323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11921323061aSAndrew Lunn if (err < 0) 11931323061aSAndrew Lunn return err; 11941323061aSAndrew Lunn 11951323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 11961323061aSAndrew Lunn return 0; 11971323061aSAndrew Lunn 11981323061aSAndrew Lunn case hwmon_in_crit_alarm: 11991323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12001323061aSAndrew Lunn if (err < 0) 12011323061aSAndrew Lunn return err; 12021323061aSAndrew Lunn 12031323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 12041323061aSAndrew Lunn return 0; 12051323061aSAndrew Lunn default: 12061323061aSAndrew Lunn return -EOPNOTSUPP; 12071323061aSAndrew Lunn } 12081323061aSAndrew Lunn 12091323061aSAndrew Lunn return -EOPNOTSUPP; 12101323061aSAndrew Lunn } 12111323061aSAndrew Lunn 12121323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 12131323061aSAndrew Lunn { 12141323061aSAndrew Lunn u8 status; 12151323061aSAndrew Lunn int err; 12161323061aSAndrew Lunn 12171323061aSAndrew Lunn switch (attr) { 12181323061aSAndrew Lunn case hwmon_curr_input: 12191323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 12201323061aSAndrew Lunn 12211323061aSAndrew Lunn case hwmon_curr_lcrit: 12221323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 12231323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12241323061aSAndrew Lunn return 0; 12251323061aSAndrew Lunn 12261323061aSAndrew Lunn case hwmon_curr_min: 12271323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 12281323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12291323061aSAndrew Lunn return 0; 12301323061aSAndrew Lunn 12311323061aSAndrew Lunn case hwmon_curr_max: 12321323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 12331323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12341323061aSAndrew Lunn return 0; 12351323061aSAndrew Lunn 12361323061aSAndrew Lunn case hwmon_curr_crit: 12371323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 12381323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 12391323061aSAndrew Lunn return 0; 12401323061aSAndrew Lunn 12411323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 12421323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12431323061aSAndrew Lunn if (err < 0) 12441323061aSAndrew Lunn return err; 12451323061aSAndrew Lunn 12461323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 12471323061aSAndrew Lunn return 0; 12481323061aSAndrew Lunn 12491323061aSAndrew Lunn case hwmon_curr_min_alarm: 12501323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12511323061aSAndrew Lunn if (err < 0) 12521323061aSAndrew Lunn return err; 12531323061aSAndrew Lunn 12541323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 12551323061aSAndrew Lunn return 0; 12561323061aSAndrew Lunn 12571323061aSAndrew Lunn case hwmon_curr_max_alarm: 12581323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12591323061aSAndrew Lunn if (err < 0) 12601323061aSAndrew Lunn return err; 12611323061aSAndrew Lunn 12621323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 12631323061aSAndrew Lunn return 0; 12641323061aSAndrew Lunn 12651323061aSAndrew Lunn case hwmon_curr_crit_alarm: 12661323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12671323061aSAndrew Lunn if (err < 0) 12681323061aSAndrew Lunn return err; 12691323061aSAndrew Lunn 12701323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 12711323061aSAndrew Lunn return 0; 12721323061aSAndrew Lunn default: 12731323061aSAndrew Lunn return -EOPNOTSUPP; 12741323061aSAndrew Lunn } 12751323061aSAndrew Lunn 12761323061aSAndrew Lunn return -EOPNOTSUPP; 12771323061aSAndrew Lunn } 12781323061aSAndrew Lunn 12791323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 12801323061aSAndrew Lunn { 12811323061aSAndrew Lunn u8 status; 12821323061aSAndrew Lunn int err; 12831323061aSAndrew Lunn 12841323061aSAndrew Lunn switch (attr) { 12851323061aSAndrew Lunn case hwmon_power_input: 12861323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 12871323061aSAndrew Lunn 12881323061aSAndrew Lunn case hwmon_power_lcrit: 12891323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 12901323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12911323061aSAndrew Lunn return 0; 12921323061aSAndrew Lunn 12931323061aSAndrew Lunn case hwmon_power_min: 12941323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 12951323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12961323061aSAndrew Lunn return 0; 12971323061aSAndrew Lunn 12981323061aSAndrew Lunn case hwmon_power_max: 12991323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 13001323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 13011323061aSAndrew Lunn return 0; 13021323061aSAndrew Lunn 13031323061aSAndrew Lunn case hwmon_power_crit: 13041323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 13051323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 13061323061aSAndrew Lunn return 0; 13071323061aSAndrew Lunn 13081323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 13091323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 13101323061aSAndrew Lunn if (err < 0) 13111323061aSAndrew Lunn return err; 13121323061aSAndrew Lunn 13131323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 13141323061aSAndrew Lunn return 0; 13151323061aSAndrew Lunn 13161323061aSAndrew Lunn case hwmon_power_min_alarm: 13171323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 13181323061aSAndrew Lunn if (err < 0) 13191323061aSAndrew Lunn return err; 13201323061aSAndrew Lunn 13211323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 13221323061aSAndrew Lunn return 0; 13231323061aSAndrew Lunn 13241323061aSAndrew Lunn case hwmon_power_max_alarm: 13251323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 13261323061aSAndrew Lunn if (err < 0) 13271323061aSAndrew Lunn return err; 13281323061aSAndrew Lunn 13291323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 13301323061aSAndrew Lunn return 0; 13311323061aSAndrew Lunn 13321323061aSAndrew Lunn case hwmon_power_crit_alarm: 13331323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 13341323061aSAndrew Lunn if (err < 0) 13351323061aSAndrew Lunn return err; 13361323061aSAndrew Lunn 13371323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 13381323061aSAndrew Lunn return 0; 13391323061aSAndrew Lunn default: 13401323061aSAndrew Lunn return -EOPNOTSUPP; 13411323061aSAndrew Lunn } 13421323061aSAndrew Lunn 13431323061aSAndrew Lunn return -EOPNOTSUPP; 13441323061aSAndrew Lunn } 13451323061aSAndrew Lunn 13461323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 13471323061aSAndrew Lunn { 13481323061aSAndrew Lunn u8 status; 13491323061aSAndrew Lunn int err; 13501323061aSAndrew Lunn 13511323061aSAndrew Lunn switch (attr) { 13521323061aSAndrew Lunn case hwmon_power_input: 13531323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 13541323061aSAndrew Lunn 13551323061aSAndrew Lunn case hwmon_power_lcrit: 13561323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 13571323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13581323061aSAndrew Lunn return 0; 13591323061aSAndrew Lunn 13601323061aSAndrew Lunn case hwmon_power_min: 13611323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 13621323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13631323061aSAndrew Lunn return 0; 13641323061aSAndrew Lunn 13651323061aSAndrew Lunn case hwmon_power_max: 13661323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 13671323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13681323061aSAndrew Lunn return 0; 13691323061aSAndrew Lunn 13701323061aSAndrew Lunn case hwmon_power_crit: 13711323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 13721323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 13731323061aSAndrew Lunn return 0; 13741323061aSAndrew Lunn 13751323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 13761323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 13771323061aSAndrew Lunn if (err < 0) 13781323061aSAndrew Lunn return err; 13791323061aSAndrew Lunn 13801323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 13811323061aSAndrew Lunn return 0; 13821323061aSAndrew Lunn 13831323061aSAndrew Lunn case hwmon_power_min_alarm: 13841323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 13851323061aSAndrew Lunn if (err < 0) 13861323061aSAndrew Lunn return err; 13871323061aSAndrew Lunn 13881323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 13891323061aSAndrew Lunn return 0; 13901323061aSAndrew Lunn 13911323061aSAndrew Lunn case hwmon_power_max_alarm: 13921323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 13931323061aSAndrew Lunn if (err < 0) 13941323061aSAndrew Lunn return err; 13951323061aSAndrew Lunn 13961323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 13971323061aSAndrew Lunn return 0; 13981323061aSAndrew Lunn 13991323061aSAndrew Lunn case hwmon_power_crit_alarm: 14001323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 14011323061aSAndrew Lunn if (err < 0) 14021323061aSAndrew Lunn return err; 14031323061aSAndrew Lunn 14041323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 14051323061aSAndrew Lunn return 0; 14061323061aSAndrew Lunn default: 14071323061aSAndrew Lunn return -EOPNOTSUPP; 14081323061aSAndrew Lunn } 14091323061aSAndrew Lunn 14101323061aSAndrew Lunn return -EOPNOTSUPP; 14111323061aSAndrew Lunn } 14121323061aSAndrew Lunn 14131323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 14141323061aSAndrew Lunn u32 attr, int channel, long *value) 14151323061aSAndrew Lunn { 14161323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 14171323061aSAndrew Lunn 14181323061aSAndrew Lunn switch (type) { 14191323061aSAndrew Lunn case hwmon_temp: 14201323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 14211323061aSAndrew Lunn case hwmon_in: 14221323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 14231323061aSAndrew Lunn case hwmon_curr: 14241323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 14251323061aSAndrew Lunn case hwmon_power: 14261323061aSAndrew Lunn switch (channel) { 14271323061aSAndrew Lunn case 0: 14281323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 14291323061aSAndrew Lunn case 1: 14301323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 14311323061aSAndrew Lunn default: 14321323061aSAndrew Lunn return -EOPNOTSUPP; 14331323061aSAndrew Lunn } 14341323061aSAndrew Lunn default: 14351323061aSAndrew Lunn return -EOPNOTSUPP; 14361323061aSAndrew Lunn } 14371323061aSAndrew Lunn } 14381323061aSAndrew Lunn 1439c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1440c1236979SAndrew Lunn "TX_power", 1441c1236979SAndrew Lunn "RX_power", 1442c1236979SAndrew Lunn }; 1443c1236979SAndrew Lunn 1444c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1445c1236979SAndrew Lunn enum hwmon_sensor_types type, 1446c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1447c1236979SAndrew Lunn { 1448c1236979SAndrew Lunn switch (type) { 1449c1236979SAndrew Lunn case hwmon_curr: 1450c1236979SAndrew Lunn switch (attr) { 1451c1236979SAndrew Lunn case hwmon_curr_label: 1452c1236979SAndrew Lunn *str = "bias"; 1453c1236979SAndrew Lunn return 0; 1454c1236979SAndrew Lunn default: 1455c1236979SAndrew Lunn return -EOPNOTSUPP; 1456c1236979SAndrew Lunn } 1457c1236979SAndrew Lunn break; 1458c1236979SAndrew Lunn case hwmon_temp: 1459c1236979SAndrew Lunn switch (attr) { 1460c1236979SAndrew Lunn case hwmon_temp_label: 1461c1236979SAndrew Lunn *str = "temperature"; 1462c1236979SAndrew Lunn return 0; 1463c1236979SAndrew Lunn default: 1464c1236979SAndrew Lunn return -EOPNOTSUPP; 1465c1236979SAndrew Lunn } 1466c1236979SAndrew Lunn break; 1467c1236979SAndrew Lunn case hwmon_in: 1468c1236979SAndrew Lunn switch (attr) { 1469c1236979SAndrew Lunn case hwmon_in_label: 1470c1236979SAndrew Lunn *str = "VCC"; 1471c1236979SAndrew Lunn return 0; 1472c1236979SAndrew Lunn default: 1473c1236979SAndrew Lunn return -EOPNOTSUPP; 1474c1236979SAndrew Lunn } 1475c1236979SAndrew Lunn break; 1476c1236979SAndrew Lunn case hwmon_power: 1477c1236979SAndrew Lunn switch (attr) { 1478c1236979SAndrew Lunn case hwmon_power_label: 1479c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1480c1236979SAndrew Lunn return 0; 1481c1236979SAndrew Lunn default: 1482c1236979SAndrew Lunn return -EOPNOTSUPP; 1483c1236979SAndrew Lunn } 1484c1236979SAndrew Lunn break; 1485c1236979SAndrew Lunn default: 1486c1236979SAndrew Lunn return -EOPNOTSUPP; 1487c1236979SAndrew Lunn } 1488c1236979SAndrew Lunn 1489c1236979SAndrew Lunn return -EOPNOTSUPP; 1490c1236979SAndrew Lunn } 1491c1236979SAndrew Lunn 14921323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 14931323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 14941323061aSAndrew Lunn .read = sfp_hwmon_read, 1495c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 14961323061aSAndrew Lunn }; 14971323061aSAndrew Lunn 1498490fde26SKrzysztof Kozlowski static const struct hwmon_channel_info * const sfp_hwmon_info[] = { 1499815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1500815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1501815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 15021323061aSAndrew Lunn HWMON_I_INPUT | 15031323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 15041323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 15051323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1506c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1507815f5f57SBeniamin Sandu HWMON_I_LABEL), 1508815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1509815f5f57SBeniamin Sandu HWMON_T_INPUT | 1510815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1511815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1512815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1513815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1514815f5f57SBeniamin Sandu HWMON_T_LABEL), 1515815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 15161323061aSAndrew Lunn HWMON_C_INPUT | 15171323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 15181323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 15191323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1520c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1521815f5f57SBeniamin Sandu HWMON_C_LABEL), 1522815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 15231323061aSAndrew Lunn /* Transmit power */ 15241323061aSAndrew Lunn HWMON_P_INPUT | 15251323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 15261323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 15271323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1528c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1529c1236979SAndrew Lunn HWMON_P_LABEL, 15301323061aSAndrew Lunn /* Receive power */ 15311323061aSAndrew Lunn HWMON_P_INPUT | 15321323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 15331323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 15341323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1535c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1536815f5f57SBeniamin Sandu HWMON_P_LABEL), 15371323061aSAndrew Lunn NULL, 15381323061aSAndrew Lunn }; 15391323061aSAndrew Lunn 15401323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 15411323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 15421323061aSAndrew Lunn .info = sfp_hwmon_info, 15431323061aSAndrew Lunn }; 15441323061aSAndrew Lunn 1545139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 15461323061aSAndrew Lunn { 1547139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 15483f118c44SMichael Walle int err; 15491323061aSAndrew Lunn 1550426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1551426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1552426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1553426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1554426c6cbcSPali Rohár * skip registration of hwmon device. 1555426c6cbcSPali Rohár */ 1556426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1557426c6cbcSPali Rohár dev_info(sfp->dev, 1558426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1559426c6cbcSPali Rohár dev_info(sfp->dev, 1560426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1561426c6cbcSPali Rohár return; 1562426c6cbcSPali Rohár } 1563426c6cbcSPali Rohár 1564139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1565139d3a21SRussell King if (err < 0) { 1566139d3a21SRussell King if (sfp->hwmon_tries--) { 1567139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1568139d3a21SRussell King T_PROBE_RETRY_SLOW); 1569139d3a21SRussell King } else { 15709ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 15719ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1572139d3a21SRussell King } 1573139d3a21SRussell King return; 1574139d3a21SRussell King } 1575139d3a21SRussell King 15763f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 15773f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1578139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1579139d3a21SRussell King return; 1580139d3a21SRussell King } 1581139d3a21SRussell King 1582139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1583139d3a21SRussell King sfp->hwmon_name, sfp, 1584139d3a21SRussell King &sfp_hwmon_chip_info, 1585139d3a21SRussell King NULL); 1586139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1587139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1588139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1589139d3a21SRussell King } 1590139d3a21SRussell King 1591139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1592139d3a21SRussell King { 1593f94b9bedSRussell King (Oracle) if (sfp->have_a2 && sfp->id.ext.diagmon & SFP_DIAGMON_DDM) { 1594139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1595139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 1596f94b9bedSRussell King (Oracle) } 15971323061aSAndrew Lunn 1598139d3a21SRussell King return 0; 15991323061aSAndrew Lunn } 16001323061aSAndrew Lunn 16011323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 16021323061aSAndrew Lunn { 1603139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 16043e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 16051323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 16063e322474SAndrew Lunn sfp->hwmon_dev = NULL; 16071323061aSAndrew Lunn kfree(sfp->hwmon_name); 16081323061aSAndrew Lunn } 16093e322474SAndrew Lunn } 1610139d3a21SRussell King 1611139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1612139d3a21SRussell King { 1613139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1614139d3a21SRussell King 1615139d3a21SRussell King return 0; 1616139d3a21SRussell King } 1617139d3a21SRussell King 1618139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1619139d3a21SRussell King { 1620139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1621139d3a21SRussell King } 16221323061aSAndrew Lunn #else 16231323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 16241323061aSAndrew Lunn { 16251323061aSAndrew Lunn return 0; 16261323061aSAndrew Lunn } 16271323061aSAndrew Lunn 16281323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 16291323061aSAndrew Lunn { 16301323061aSAndrew Lunn } 1631139d3a21SRussell King 1632139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1633139d3a21SRussell King { 1634139d3a21SRussell King return 0; 1635139d3a21SRussell King } 1636139d3a21SRussell King 1637139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1638139d3a21SRussell King { 1639139d3a21SRussell King } 16401323061aSAndrew Lunn #endif 16411323061aSAndrew Lunn 164273970055SRussell King /* Helpers */ 164373970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 164473970055SRussell King { 164573970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 164673970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 1647418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, SFP_F_TX_DISABLE); 164873970055SRussell King } 164973970055SRussell King 165073970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 165173970055SRussell King { 165273970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 165373970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 1654418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, 0); 165573970055SRussell King } 165673970055SRussell King 16579cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 16589cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 16599cc8976cSRussell King { 16609cc8976cSRussell King struct sfp *sfp = s->private; 16619cc8976cSRussell King 16629cc8976cSRussell King seq_printf(s, "Module state: %s\n", 16639cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 16649cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 16659cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 16669cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 16679cc8976cSRussell King seq_printf(s, "Device state: %s\n", 16689cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 16699cc8976cSRussell King seq_printf(s, "Main state: %s\n", 16709cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 16719cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 16729cc8976cSRussell King sfp->sm_fault_retries); 16739cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 16749cc8976cSRussell King sfp->sm_phy_retries); 1675fc082b39SRussell King (Oracle) seq_printf(s, "Signalling rate: %u kBd\n", sfp->rate_kbd); 1676fc082b39SRussell King (Oracle) seq_printf(s, "Rate select threshold: %u kBd\n", 1677fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd); 16789cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 16799cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 16809cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 16819cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 1682fc082b39SRussell King (Oracle) seq_printf(s, "rs0: %d\n", !!(sfp->state & SFP_F_RS0)); 1683fc082b39SRussell King (Oracle) seq_printf(s, "rs1: %d\n", !!(sfp->state & SFP_F_RS1)); 16849cc8976cSRussell King return 0; 16859cc8976cSRussell King } 16869cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 16879cc8976cSRussell King 16889cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 16899cc8976cSRussell King { 16909cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 16919cc8976cSRussell King 16929cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 16939cc8976cSRussell King &sfp_debug_state_fops); 16949cc8976cSRussell King } 16959cc8976cSRussell King 16969cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 16979cc8976cSRussell King { 16989cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 16999cc8976cSRussell King } 17009cc8976cSRussell King #else 17019cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 17029cc8976cSRussell King { 17039cc8976cSRussell King } 17049cc8976cSRussell King 17059cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 17069cc8976cSRussell King { 17079cc8976cSRussell King } 17089cc8976cSRussell King #endif 17099cc8976cSRussell King 171073970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 171173970055SRussell King { 17121974fd3bSRussell King (Oracle) unsigned int state; 171373970055SRussell King 17141974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 17151974fd3bSRussell King (Oracle) state = sfp->state; 17161974fd3bSRussell King (Oracle) if (!(state & SFP_F_TX_DISABLE)) { 171773970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 171873970055SRussell King 171973970055SRussell King udelay(T_RESET_US); 172073970055SRussell King 172173970055SRussell King sfp_set_state(sfp, state); 172273970055SRussell King } 17231974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 17241974fd3bSRussell King (Oracle) } 172573970055SRussell King 172673970055SRussell King /* SFP state machine */ 172773970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 172873970055SRussell King { 172973970055SRussell King if (timeout) 173073970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 173173970055SRussell King timeout); 173273970055SRussell King else 173373970055SRussell King cancel_delayed_work(&sfp->timeout); 173473970055SRussell King } 173573970055SRussell King 173673970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 173773970055SRussell King unsigned int timeout) 173873970055SRussell King { 173973970055SRussell King sfp->sm_state = state; 174073970055SRussell King sfp_sm_set_timer(sfp, timeout); 174173970055SRussell King } 174273970055SRussell King 17430936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1744516b29edSFlorian Fainelli unsigned int timeout) 174573970055SRussell King { 174673970055SRussell King sfp->sm_mod_state = state; 174773970055SRussell King sfp_sm_set_timer(sfp, timeout); 174873970055SRussell King } 174973970055SRussell King 175073970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 175173970055SRussell King { 175273970055SRussell King sfp_remove_phy(sfp->sfp_bus); 175373970055SRussell King phy_device_remove(sfp->mod_phy); 175473970055SRussell King phy_device_free(sfp->mod_phy); 175573970055SRussell King sfp->mod_phy = NULL; 175673970055SRussell King } 175773970055SRussell King 1758324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 175973970055SRussell King { 176073970055SRussell King struct phy_device *phy; 176173970055SRussell King int err; 176273970055SRussell King 1763324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 17641cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 17651cb89a14SRussell King return PTR_ERR(phy); 176620b56ed9SRussell King if (IS_ERR(phy)) { 17679ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1768256e43cbSRussell King return PTR_ERR(phy); 176973970055SRussell King } 177073970055SRussell King 1771f4bf4678SRussell King (Oracle) /* Mark this PHY as being on a SFP module */ 1772f4bf4678SRussell King (Oracle) phy->is_on_sfp_module = true; 1773f4bf4678SRussell King (Oracle) 17749a484621SRussell King err = phy_device_register(phy); 17759a484621SRussell King if (err) { 17769a484621SRussell King phy_device_free(phy); 17779ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 17789ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1779256e43cbSRussell King return err; 17809a484621SRussell King } 17819a484621SRussell King 178273970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 178373970055SRussell King if (err) { 178473970055SRussell King phy_device_remove(phy); 178573970055SRussell King phy_device_free(phy); 17869ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1787256e43cbSRussell King return err; 178873970055SRussell King } 178973970055SRussell King 179073970055SRussell King sfp->mod_phy = phy; 1791256e43cbSRussell King 1792256e43cbSRussell King return 0; 179373970055SRussell King } 179473970055SRussell King 179573970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 179673970055SRussell King { 179773970055SRussell King sfp_link_up(sfp->sfp_bus); 179873970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 179973970055SRussell King } 180073970055SRussell King 180173970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 180273970055SRussell King { 180373970055SRussell King sfp_link_down(sfp->sfp_bus); 180473970055SRussell King } 180573970055SRussell King 180673970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 180773970055SRussell King { 1808624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1809624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1810624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1811624407d2SRussell King bool los = false; 181273970055SRussell King 1813710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1814624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1815624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 181673970055SRussell King */ 1817624407d2SRussell King if (los_options == los_inverted) 1818624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1819624407d2SRussell King else if (los_options == los_normal) 1820624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 182173970055SRussell King 182273970055SRussell King if (los) 182373970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 182473970055SRussell King else 182573970055SRussell King sfp_sm_link_up(sfp); 182673970055SRussell King } 182773970055SRussell King 1828710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1829710dfbb0SRussell King { 1830624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1831624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1832624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1833624407d2SRussell King 1834624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1835624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1836710dfbb0SRussell King } 1837710dfbb0SRussell King 1838710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1839710dfbb0SRussell King { 1840624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1841624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1842624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1843624407d2SRussell King 1844624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1845624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1846710dfbb0SRussell King } 1847710dfbb0SRussell King 184863ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 184973970055SRussell King { 1850281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1851516b29edSFlorian Fainelli dev_err(sfp->dev, 1852516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 185373970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 185473970055SRussell King } else { 185573970055SRussell King if (warn) 185673970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 185773970055SRussell King 185863ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 185973970055SRussell King } 186073970055SRussell King } 186173970055SRussell King 1862e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1863e85b1347SMarek Behún { 1864e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1865e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1866e85b1347SMarek Behún 1867e85b1347SMarek Behún return 0; 1868e85b1347SMarek Behún } 1869e85b1347SMarek Behún 18709a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 18719a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 18729a484621SRussell King * or clause 45 PHY. 18739a484621SRussell King * 18749a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 18759a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 18769a484621SRussell King * PHY driver to determine. 18779a484621SRussell King * 18789a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 18799a484621SRussell King * mode according to the negotiated line speed. 18809a484621SRussell King */ 1881256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1882181f29daSRussell King { 1883256e43cbSRussell King int err = 0; 1884256e43cbSRussell King 1885e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1886e85b1347SMarek Behún case MDIO_I2C_NONE: 18879a484621SRussell King break; 18889a484621SRussell King 1889e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1890324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 18919a484621SRussell King break; 1892e85b1347SMarek Behún 1893e85b1347SMarek Behún case MDIO_I2C_C45: 1894324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1895e85b1347SMarek Behún break; 189609bbedacSMarek Behún 189709bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1898324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 189909bbedacSMarek Behún break; 19009a484621SRussell King } 1901e85b1347SMarek Behún 1902256e43cbSRussell King return err; 190373970055SRussell King } 190473970055SRussell King 1905ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 19063bb35261SJon Nettleton { 1907ed32abb1SRussell King u32 power_mW = 1000; 19085765cee1SRussell King (Oracle) bool supports_a2; 19093bb35261SJon Nettleton 191018cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 191118cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1912ed32abb1SRussell King power_mW = 1500; 1913f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1914f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1915f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1916ed32abb1SRussell King power_mW = 2000; 19173bb35261SJon Nettleton 191802eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 191902eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 192002eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 192102eaf5a7SRussell King (Oracle) return 0; 192202eaf5a7SRussell King (Oracle) } 192302eaf5a7SRussell King (Oracle) 19245765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 19255765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 19265765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 19275765cee1SRussell King (Oracle) 1928ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 19297cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 19305765cee1SRussell King (Oracle) if (!supports_a2) { 19317cfa9c92SRussell King /* The module appears not to implement bus address 19327cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 19337cfa9c92SRussell King * indicated mode. 19347cfa9c92SRussell King */ 19353bb35261SJon Nettleton dev_err(sfp->dev, 19363bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1937ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 19383bb35261SJon Nettleton return -EINVAL; 19397cfa9c92SRussell King } else { 19403bb35261SJon Nettleton dev_warn(sfp->dev, 19413bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1942ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 19433bb35261SJon Nettleton return 0; 19443bb35261SJon Nettleton } 19457cfa9c92SRussell King } 19467cfa9c92SRussell King 19475765cee1SRussell King (Oracle) if (!supports_a2) { 19485765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 19495765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 19505765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 19515765cee1SRussell King (Oracle) */ 19525765cee1SRussell King (Oracle) return 0; 19535765cee1SRussell King (Oracle) } 19545765cee1SRussell King (Oracle) 19557cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 19567cfa9c92SRussell King * an address change sequence, warn the user that the module may 19577cfa9c92SRussell King * not be functional. 19587cfa9c92SRussell King */ 19595765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 19607cfa9c92SRussell King dev_warn(sfp->dev, 196107f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 19627cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 19637cfa9c92SRussell King return 0; 19647cfa9c92SRussell King } 19653bb35261SJon Nettleton 1966ed32abb1SRussell King sfp->module_power_mW = power_mW; 1967ed32abb1SRussell King 1968ed32abb1SRussell King return 0; 1969ed32abb1SRussell King } 1970ed32abb1SRussell King 1971b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1972ed32abb1SRussell King { 1973ed32abb1SRussell King int err; 1974ed32abb1SRussell King 1975bd1432f6SRussell King (Oracle) err = sfp_modify_u8(sfp, true, SFP_EXT_STATUS, 1976bd1432f6SRussell King (Oracle) SFP_EXT_STATUS_PWRLVL_SELECT, 1977bd1432f6SRussell King (Oracle) enable ? SFP_EXT_STATUS_PWRLVL_SELECT : 0); 1978bd1432f6SRussell King (Oracle) if (err != sizeof(u8)) { 1979bd1432f6SRussell King (Oracle) dev_err(sfp->dev, "failed to %sable high power: %pe\n", 1980bd1432f6SRussell King (Oracle) enable ? "en" : "dis", ERR_PTR(err)); 1981b036a554SRussell King return -EAGAIN; 19823bb35261SJon Nettleton } 19833bb35261SJon Nettleton 1984b036a554SRussell King if (enable) 19853bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1986ed32abb1SRussell King sfp->module_power_mW / 1000, 1987ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 19883bb35261SJon Nettleton 1989b036a554SRussell King return 0; 19903bb35261SJon Nettleton } 19913bb35261SJon Nettleton 1992fc082b39SRussell King (Oracle) static void sfp_module_parse_rate_select(struct sfp *sfp) 1993fc082b39SRussell King (Oracle) { 1994fc082b39SRussell King (Oracle) u8 rate_id; 1995fc082b39SRussell King (Oracle) 1996fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 0; 1997fc082b39SRussell King (Oracle) sfp->rs_state_mask = 0; 1998fc082b39SRussell King (Oracle) 1999fc082b39SRussell King (Oracle) if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_RATE_SELECT))) 2000fc082b39SRussell King (Oracle) /* No support for RateSelect */ 2001fc082b39SRussell King (Oracle) return; 2002fc082b39SRussell King (Oracle) 2003fc082b39SRussell King (Oracle) /* Default to INF-8074 RateSelect operation. The signalling threshold 2004fc082b39SRussell King (Oracle) * rate is not well specified, so always select "Full Bandwidth", but 2005fc082b39SRussell King (Oracle) * SFF-8079 reveals that it is understood that RS0 will be low for 2006fc082b39SRussell King (Oracle) * 1.0625Gb/s and high for 2.125Gb/s. Choose a value half-way between. 2007fc082b39SRussell King (Oracle) * This method exists prior to SFF-8472. 2008fc082b39SRussell King (Oracle) */ 2009fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 2010fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 1594; 2011fc082b39SRussell King (Oracle) 2012fc082b39SRussell King (Oracle) /* Parse the rate identifier, which is complicated due to history: 2013fc082b39SRussell King (Oracle) * SFF-8472 rev 9.5 marks this field as reserved. 2014fc082b39SRussell King (Oracle) * SFF-8079 references SFF-8472 rev 9.5 and defines bit 0. SFF-8472 2015fc082b39SRussell King (Oracle) * compliance is not required. 2016fc082b39SRussell King (Oracle) * SFF-8472 rev 10.2 defines this field using values 0..4 2017fc082b39SRussell King (Oracle) * SFF-8472 rev 11.0 redefines this field with bit 0 for SFF-8079 2018fc082b39SRussell King (Oracle) * and even values. 2019fc082b39SRussell King (Oracle) */ 2020fc082b39SRussell King (Oracle) rate_id = sfp->id.base.rate_id; 2021fc082b39SRussell King (Oracle) if (rate_id == 0) 2022fc082b39SRussell King (Oracle) /* Unspecified */ 2023fc082b39SRussell King (Oracle) return; 2024fc082b39SRussell King (Oracle) 2025fc082b39SRussell King (Oracle) /* SFF-8472 rev 10.0..10.4 did not account for SFF-8079 using bit 0, 2026fc082b39SRussell King (Oracle) * and allocated value 3 to SFF-8431 independent tx/rx rate select. 2027fc082b39SRussell King (Oracle) * Convert this to a SFF-8472 rev 11.0 rate identifier. 2028fc082b39SRussell King (Oracle) */ 2029fc082b39SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 2030fc082b39SRussell King (Oracle) sfp->id.ext.sff8472_compliance < SFP_SFF8472_COMPLIANCE_REV11_0 && 2031fc082b39SRussell King (Oracle) rate_id == 3) 2032fc082b39SRussell King (Oracle) rate_id = SFF_RID_8431; 2033fc082b39SRussell King (Oracle) 2034fc082b39SRussell King (Oracle) if (rate_id & SFF_RID_8079) { 2035fc082b39SRussell King (Oracle) /* SFF-8079 RateSelect / Application Select in conjunction with 2036fc082b39SRussell King (Oracle) * SFF-8472 rev 9.5. SFF-8079 defines rate_id as a bitfield 2037fc082b39SRussell King (Oracle) * with only bit 0 used, which takes precedence over SFF-8472. 2038fc082b39SRussell King (Oracle) */ 2039fc082b39SRussell King (Oracle) if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_APP_SELECT_SFF8079)) { 2040fc082b39SRussell King (Oracle) /* SFF-8079 Part 1 - rate selection between Fibre 2041fc082b39SRussell King (Oracle) * Channel 1.0625/2.125/4.25 Gbd modes. Note that RS0 2042fc082b39SRussell King (Oracle) * is high for 2125, so we have to subtract 1 to 2043fc082b39SRussell King (Oracle) * include it. 2044fc082b39SRussell King (Oracle) */ 2045fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 2125 - 1; 2046fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 2047fc082b39SRussell King (Oracle) } 2048fc082b39SRussell King (Oracle) return; 2049fc082b39SRussell King (Oracle) } 2050fc082b39SRussell King (Oracle) 2051fc082b39SRussell King (Oracle) /* SFF-8472 rev 9.5 does not define the rate identifier */ 2052fc082b39SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance <= SFP_SFF8472_COMPLIANCE_REV9_5) 2053fc082b39SRussell King (Oracle) return; 2054fc082b39SRussell King (Oracle) 2055fc082b39SRussell King (Oracle) /* SFF-8472 rev 11.0 defines rate_id as a numerical value which will 2056fc082b39SRussell King (Oracle) * always have bit 0 clear due to SFF-8079's bitfield usage of rate_id. 2057fc082b39SRussell King (Oracle) */ 2058fc082b39SRussell King (Oracle) switch (rate_id) { 2059fc082b39SRussell King (Oracle) case SFF_RID_8431_RX_ONLY: 2060fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2061fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0; 2062fc082b39SRussell King (Oracle) break; 2063fc082b39SRussell King (Oracle) 2064fc082b39SRussell King (Oracle) case SFF_RID_8431_TX_ONLY: 2065fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2066fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS1; 2067fc082b39SRussell King (Oracle) break; 2068fc082b39SRussell King (Oracle) 2069fc082b39SRussell King (Oracle) case SFF_RID_8431: 2070fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 4250; 2071fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0 | SFP_F_RS1; 2072fc082b39SRussell King (Oracle) break; 2073fc082b39SRussell King (Oracle) 2074fc082b39SRussell King (Oracle) case SFF_RID_10G8G: 2075fc082b39SRussell King (Oracle) sfp->rs_threshold_kbd = 9000; 2076fc082b39SRussell King (Oracle) sfp->rs_state_mask = SFP_F_RS0 | SFP_F_RS1; 2077fc082b39SRussell King (Oracle) break; 2078fc082b39SRussell King (Oracle) } 2079fc082b39SRussell King (Oracle) } 2080fc082b39SRussell King (Oracle) 2081426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 2082426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 2083426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 2084426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 2085426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 2086426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 2087426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 2088426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 2089426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 2090426c6cbcSPali Rohár * at a time. 20910d035bedSRussell King */ 2092426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 20930d035bedSRussell King { 2094426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 20950d035bedSRussell King 2096426c6cbcSPali Rohár /* Already using byte IO */ 2097426c6cbcSPali Rohár if (block_size == 1) 2098426c6cbcSPali Rohár return false; 2099426c6cbcSPali Rohár 2100426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 2101426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 2102426c6cbcSPali Rohár return false; 21030d035bedSRussell King } 2104426c6cbcSPali Rohár return true; 21050d035bedSRussell King } 21060d035bedSRussell King 2107b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 2108b18432c5SChris Healy { 2109b18432c5SChris Healy u8 check; 2110b18432c5SChris Healy int err; 2111b18432c5SChris Healy 2112b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 2113b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 2114b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 2115b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 2116b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 2117b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 2118b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 2119b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 2120b18432c5SChris Healy if (err != 3) { 21219ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 21229ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 21239ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 2124b18432c5SChris Healy return err; 2125b18432c5SChris Healy } 2126b18432c5SChris Healy 2127b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 2128b18432c5SChris Healy mdelay(50); 2129b18432c5SChris Healy 2130b18432c5SChris Healy /* Update base structure checksum */ 2131b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 2132b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 2133b18432c5SChris Healy if (err != 1) { 21349ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 21359ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 21369ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 2137b18432c5SChris Healy return err; 2138b18432c5SChris Healy } 2139b18432c5SChris Healy } 2140b18432c5SChris Healy return 0; 2141b18432c5SChris Healy } 2142b18432c5SChris Healy 2143f94b9bedSRussell King (Oracle) static int sfp_module_parse_sff8472(struct sfp *sfp) 2144f94b9bedSRussell King (Oracle) { 2145f94b9bedSRussell King (Oracle) /* If the module requires address swap mode, warn about it */ 2146f94b9bedSRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 2147f94b9bedSRussell King (Oracle) dev_warn(sfp->dev, 2148f94b9bedSRussell King (Oracle) "module address swap to access page 0xA2 is not supported.\n"); 2149f94b9bedSRussell King (Oracle) else 2150f94b9bedSRussell King (Oracle) sfp->have_a2 = true; 2151f94b9bedSRussell King (Oracle) 2152f94b9bedSRussell King (Oracle) return 0; 2153f94b9bedSRussell King (Oracle) } 2154f94b9bedSRussell King (Oracle) 2155e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 215673970055SRussell King { 215773970055SRussell King /* SFP module inserted - read I2C data */ 215873970055SRussell King struct sfp_eeprom_id id; 2159b18432c5SChris Healy bool cotsworks_sfbg; 21601974fd3bSRussell King (Oracle) unsigned int mask; 2161981f1f80SRussell King bool cotsworks; 216273970055SRussell King u8 check; 21633bb35261SJon Nettleton int ret; 216473970055SRussell King 2165813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 21660d035bedSRussell King 21670d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 21683bb35261SJon Nettleton if (ret < 0) { 2169e117be74SRussell King if (report) 21709ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 21719ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 217273970055SRussell King return -EAGAIN; 217373970055SRussell King } 217473970055SRussell King 21750d035bedSRussell King if (ret != sizeof(id.base)) { 21769ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 217773970055SRussell King return -EAGAIN; 217873970055SRussell King } 217973970055SRussell King 2180426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 2181426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 2182426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 2183426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 2184426c6cbcSPali Rohár * is really required and we have no other option. 2185426c6cbcSPali Rohár */ 2186426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 2187426c6cbcSPali Rohár dev_info(sfp->dev, 2188426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 2189426c6cbcSPali Rohár dev_info(sfp->dev, 2190426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 2191426c6cbcSPali Rohár sfp->i2c_block_size = 1; 2192426c6cbcSPali Rohár 2193426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 2194426c6cbcSPali Rohár if (ret < 0) { 2195426c6cbcSPali Rohár if (report) 21969ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 21979ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 21989ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2199426c6cbcSPali Rohár return -EAGAIN; 2200426c6cbcSPali Rohár } 2201426c6cbcSPali Rohár 2202426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 22039ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 22049ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2205426c6cbcSPali Rohár return -EAGAIN; 2206426c6cbcSPali Rohár } 2207426c6cbcSPali Rohár } 2208426c6cbcSPali Rohár 2209981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 2210981f1f80SRussell King * do the final programming with the final module part number, 2211981f1f80SRussell King * serial number and date code. 2212981f1f80SRussell King */ 2213981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 2214b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 2215b18432c5SChris Healy 2216b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 2217b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 2218b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 2219b18432c5SChris Healy */ 2220b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 2221b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 2222b18432c5SChris Healy if (ret < 0) 2223b18432c5SChris Healy return ret; 2224b18432c5SChris Healy } 2225981f1f80SRussell King 222673970055SRussell King /* Validate the checksum over the base structure */ 222773970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 222873970055SRussell King if (check != id.base.cc_base) { 2229981f1f80SRussell King if (cotsworks) { 2230981f1f80SRussell King dev_warn(sfp->dev, 2231981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 2232981f1f80SRussell King check, id.base.cc_base); 2233981f1f80SRussell King } else { 223473970055SRussell King dev_err(sfp->dev, 2235981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2236981f1f80SRussell King check, id.base.cc_base); 223773970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2238981f1f80SRussell King 16, 1, &id, sizeof(id), true); 223973970055SRussell King return -EINVAL; 224073970055SRussell King } 2241981f1f80SRussell King } 224273970055SRussell King 22430d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 22440d035bedSRussell King if (ret < 0) { 22450d035bedSRussell King if (report) 22469ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 22479ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 22480d035bedSRussell King return -EAGAIN; 22490d035bedSRussell King } 22500d035bedSRussell King 22510d035bedSRussell King if (ret != sizeof(id.ext)) { 22529ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 22530d035bedSRussell King return -EAGAIN; 22540d035bedSRussell King } 22550d035bedSRussell King 225673970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 225773970055SRussell King if (check != id.ext.cc_ext) { 2258981f1f80SRussell King if (cotsworks) { 2259981f1f80SRussell King dev_warn(sfp->dev, 2260981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2261981f1f80SRussell King check, id.ext.cc_ext); 2262981f1f80SRussell King } else { 226373970055SRussell King dev_err(sfp->dev, 2264981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2265981f1f80SRussell King check, id.ext.cc_ext); 2266981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2267981f1f80SRussell King 16, 1, &id, sizeof(id), true); 226873970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 226973970055SRussell King } 2270981f1f80SRussell King } 227173970055SRussell King 227273970055SRussell King sfp->id = id; 227373970055SRussell King 2274a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2275a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2276a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2277a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2278a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2279a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 228073970055SRussell King 2281259c8618SRussell King /* Check whether we support this module */ 2282f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2283259c8618SRussell King dev_err(sfp->dev, 2284259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 228573970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 228673970055SRussell King return -EINVAL; 228773970055SRussell King } 228873970055SRussell King 2289f94b9bedSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance != SFP_SFF8472_COMPLIANCE_NONE) { 2290f94b9bedSRussell King (Oracle) ret = sfp_module_parse_sff8472(sfp); 2291f94b9bedSRussell King (Oracle) if (ret < 0) 2292f94b9bedSRussell King (Oracle) return ret; 2293f94b9bedSRussell King (Oracle) } 2294ec7681bdSRussell King 2295ed32abb1SRussell King /* Parse the module power requirement */ 2296ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2297ed32abb1SRussell King if (ret < 0) 2298ed32abb1SRussell King return ret; 2299ed32abb1SRussell King 2300fc082b39SRussell King (Oracle) sfp_module_parse_rate_select(sfp); 2301fc082b39SRussell King (Oracle) 23021974fd3bSRussell King (Oracle) mask = SFP_F_PRESENT; 23038475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 23041974fd3bSRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 23058475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 23061974fd3bSRussell King (Oracle) mask |= SFP_F_TX_FAULT; 23078475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 23081974fd3bSRussell King (Oracle) mask |= SFP_F_LOS; 2309fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0]) 2310fc082b39SRussell King (Oracle) mask |= SFP_F_RS0; 2311fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS1]) 2312fc082b39SRussell King (Oracle) mask |= SFP_F_RS1; 23138475c4b7SRussell King (Oracle) 231426c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2315324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 231626c97a2dSRussell King 23172069624dSMatthew Hagan sfp->tx_fault_ignore = false; 23182069624dSMatthew Hagan 2319e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2320e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2321e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2322e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2323e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2324e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2325e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2326e85b1347SMarek Behún else 2327e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2328e85b1347SMarek Behún 232923571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 23301974fd3bSRussell King (Oracle) 23311974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 23321974fd3bSRussell King (Oracle) /* Initialise state bits to use from hardware */ 23331974fd3bSRussell King (Oracle) sfp->state_hw_mask = mask; 23341974fd3bSRussell King (Oracle) 2335fc082b39SRussell King (Oracle) /* We want to drive the rate select pins that the module is using */ 2336fc082b39SRussell King (Oracle) sfp->state_hw_drive |= sfp->rs_state_mask; 2337fc082b39SRussell King (Oracle) 233827541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 233927541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 23401974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 234123571c7bSRussell King (Oracle) 2342b036a554SRussell King return 0; 234373970055SRussell King } 234473970055SRussell King 234573970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 234673970055SRussell King { 234773f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 234873970055SRussell King sfp_module_remove(sfp->sfp_bus); 234973970055SRussell King 23501323061aSAndrew Lunn sfp_hwmon_remove(sfp); 23511323061aSAndrew Lunn 235273970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2353ed32abb1SRussell King sfp->module_power_mW = 0; 2354fc082b39SRussell King (Oracle) sfp->state_hw_drive = SFP_F_TX_DISABLE; 2355f94b9bedSRussell King (Oracle) sfp->have_a2 = false; 235673970055SRussell King 235773970055SRussell King dev_info(sfp->dev, "module removed\n"); 235873970055SRussell King } 235973970055SRussell King 23606b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2361e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 236273970055SRussell King { 2363e85d81a1SRussell King switch (sfp->sm_dev_state) { 2364e85d81a1SRussell King default: 23656b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 23666b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 23676b0da5c9SRussell King break; 23686b0da5c9SRussell King 23696b0da5c9SRussell King case SFP_DEV_DOWN: 23706b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 23716b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 23726b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2373e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2374e85d81a1SRussell King break; 237573970055SRussell King 2376e85d81a1SRussell King case SFP_DEV_UP: 23776b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 23786b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 23796b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2380e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2381e85d81a1SRussell King break; 2382e85d81a1SRussell King } 2383e85d81a1SRussell King } 238473970055SRussell King 2385d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2386d900954fSRussell King * the on-board EEPROM, and sets up the power level. 238773970055SRussell King */ 2388e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2389e85d81a1SRussell King { 2390b036a554SRussell King int err; 2391b036a554SRussell King 2392b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2393b036a554SRussell King if (event == SFP_E_REMOVE) { 2394d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2395d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2396b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2397b036a554SRussell King return; 2398b036a554SRussell King } 2399b036a554SRussell King 2400b036a554SRussell King /* Handle device detach globally */ 240173f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 240273f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2403b036a554SRussell King if (sfp->module_power_mW > 1000 && 2404b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2405b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 240673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2407d2e816c0SRussell King return; 2408d2e816c0SRussell King } 2409d2e816c0SRussell King 241073970055SRussell King switch (sfp->sm_mod_state) { 241173970055SRussell King default: 2412e117be74SRussell King if (event == SFP_E_INSERT) { 2413d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2414e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2415e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2416e117be74SRussell King } 241773970055SRussell King break; 241873970055SRussell King 241973970055SRussell King case SFP_MOD_PROBE: 242073f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2421b036a554SRussell King if (event != SFP_E_TIMEOUT) 2422b036a554SRussell King break; 242373970055SRussell King 2424e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2425b036a554SRussell King if (err == -EAGAIN) { 2426e117be74SRussell King if (sfp->sm_mod_tries_init && 2427e117be74SRussell King --sfp->sm_mod_tries_init) { 2428e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2429b036a554SRussell King break; 2430e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2431e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2432e117be74SRussell King dev_warn(sfp->dev, 2433e117be74SRussell King "please wait, module slow to respond\n"); 2434e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2435e117be74SRussell King break; 2436e117be74SRussell King } 2437b036a554SRussell King } 2438b036a554SRussell King if (err < 0) { 2439b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2440b036a554SRussell King break; 2441b036a554SRussell King } 2442b036a554SRussell King 244304361b8bSRussell King (Oracle) /* Force a poll to re-read the hardware signal state after 244404361b8bSRussell King (Oracle) * sfp_sm_mod_probe() changed state_hw_mask. 244504361b8bSRussell King (Oracle) */ 244604361b8bSRussell King (Oracle) mod_delayed_work(system_wq, &sfp->poll, 1); 244704361b8bSRussell King (Oracle) 244838ecd706SRussell King err = sfp_hwmon_insert(sfp); 244938ecd706SRussell King if (err) 24509ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 24519ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 245238ecd706SRussell King 245373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2454df561f66SGustavo A. R. Silva fallthrough; 245573f5e847SRussell King case SFP_MOD_WAITDEV: 245673f5e847SRussell King /* Ensure that the device is attached before proceeding */ 245773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 245873f5e847SRussell King break; 245973f5e847SRussell King 246073f5e847SRussell King /* Report the module insertion to the upstream device */ 246123571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 246223571c7bSRussell King (Oracle) sfp->quirk); 246373f5e847SRussell King if (err < 0) { 246473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 246573f5e847SRussell King break; 246673f5e847SRussell King } 246773f5e847SRussell King 2468b036a554SRussell King /* If this is a power level 1 module, we are done */ 2469b036a554SRussell King if (sfp->module_power_mW <= 1000) 2470b036a554SRussell King goto insert; 2471b036a554SRussell King 2472b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2473df561f66SGustavo A. R. Silva fallthrough; 2474b036a554SRussell King case SFP_MOD_HPOWER: 2475b036a554SRussell King /* Enable high power mode */ 2476b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 247773f5e847SRussell King if (err < 0) { 247873f5e847SRussell King if (err != -EAGAIN) { 247973f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 24800936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 248173f5e847SRussell King } else { 2482e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 248373f5e847SRussell King } 248473f5e847SRussell King break; 248573f5e847SRussell King } 248673f5e847SRussell King 248773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 248873970055SRussell King break; 248973970055SRussell King 2490b036a554SRussell King case SFP_MOD_WAITPWR: 2491b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2492b036a554SRussell King if (event != SFP_E_TIMEOUT) 2493b036a554SRussell King break; 2494b036a554SRussell King 2495b036a554SRussell King insert: 24960936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 24973bb35261SJon Nettleton break; 2498b036a554SRussell King 249973970055SRussell King case SFP_MOD_PRESENT: 250073970055SRussell King case SFP_MOD_ERROR: 250173970055SRussell King break; 250273970055SRussell King } 250373970055SRussell King } 250473970055SRussell King 2505e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2506e85d81a1SRussell King { 2507eefa6f1fSRussell King unsigned long timeout; 25081cb89a14SRussell King int ret; 2509eefa6f1fSRussell King 251073970055SRussell King /* Some events are global */ 251173970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 251273970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 251373970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 251473970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 251573970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 251673970055SRussell King sfp_sm_link_down(sfp); 251774c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 251874c551caSRussell King sfp_module_stop(sfp->sfp_bus); 251973970055SRussell King if (sfp->mod_phy) 252073970055SRussell King sfp_sm_phy_detach(sfp); 2521e85b1347SMarek Behún if (sfp->i2c_mii) 2522e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 25231539e0d3SRussell King sfp_module_tx_disable(sfp); 2524f3c9a666SRussell King sfp_soft_stop_poll(sfp); 252573970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 252673970055SRussell King return; 252773970055SRussell King } 252873970055SRussell King 252973970055SRussell King /* The main state machine */ 253073970055SRussell King switch (sfp->sm_state) { 253173970055SRussell King case SFP_S_DOWN: 2532eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2533eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2534eefa6f1fSRussell King break; 2535eefa6f1fSRussell King 25365daed426SRussell King (Oracle) /* Only use the soft state bits if we have access to the A2h 25375daed426SRussell King (Oracle) * memory, which implies that we have some level of SFF-8472 25385daed426SRussell King (Oracle) * compliance. 25395daed426SRussell King (Oracle) */ 25405daed426SRussell King (Oracle) if (sfp->have_a2) 2541f3c9a666SRussell King sfp_soft_start_poll(sfp); 2542f3c9a666SRussell King 2543f3c9a666SRussell King sfp_module_tx_enable(sfp); 2544eefa6f1fSRussell King 2545eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2546281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2547eefa6f1fSRussell King 2548eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2549eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2550324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2551324e88cbSMarek Behún * specific modules). 2552eefa6f1fSRussell King */ 2553324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2554eefa6f1fSRussell King break; 2555eefa6f1fSRussell King 2556eefa6f1fSRussell King case SFP_S_WAIT: 2557eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2558eefa6f1fSRussell King break; 2559eefa6f1fSRussell King 2560eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 256126c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 256226c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 256326c97a2dSRussell King * initialise, which is indicated by TX_FAULT 256426c97a2dSRussell King * deasserting. 2565181f29daSRussell King */ 256626c97a2dSRussell King timeout = sfp->module_t_start_up; 2567324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2568324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2569eefa6f1fSRussell King else 2570eefa6f1fSRussell King timeout = 1; 2571eefa6f1fSRussell King 2572eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2573eefa6f1fSRussell King } else { 2574eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2575eefa6f1fSRussell King * finished initialising. 2576eefa6f1fSRussell King */ 2577eefa6f1fSRussell King goto init_done; 2578181f29daSRussell King } 257973970055SRussell King break; 258073970055SRussell King 258173970055SRussell King case SFP_S_INIT: 2582d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2583e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 258426c97a2dSRussell King * or t_start_up, so assume there is a fault. 2585d23751a0SRussell King */ 2586d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2587281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2588d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 25891cb89a14SRussell King init_done: 2590e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2591e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2592e85b1347SMarek Behún if (ret < 0) { 2593e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2594e85b1347SMarek Behún break; 2595e85b1347SMarek Behún } 25961cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 25971cb89a14SRussell King goto phy_probe; 25981cb89a14SRussell King } 25991cb89a14SRussell King break; 26001cb89a14SRussell King 26011cb89a14SRussell King case SFP_S_INIT_PHY: 26021cb89a14SRussell King if (event != SFP_E_TIMEOUT) 26031cb89a14SRussell King break; 26041cb89a14SRussell King phy_probe: 26051cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2606d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2607d23751a0SRussell King */ 26081cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 26091cb89a14SRussell King if (ret == -ENODEV) { 26101cb89a14SRussell King if (--sfp->sm_phy_retries) { 26111cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 26121cb89a14SRussell King break; 26131cb89a14SRussell King } else { 26141cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 26151cb89a14SRussell King } 26161cb89a14SRussell King } else if (ret) { 2617256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2618256e43cbSRussell King break; 2619256e43cbSRussell King } 262074c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 262174c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 262274c551caSRussell King break; 262374c551caSRussell King } 2624d23751a0SRussell King sfp_sm_link_check_los(sfp); 2625d23751a0SRussell King 2626d23751a0SRussell King /* Reset the fault retry count */ 2627281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2628d23751a0SRussell King break; 2629d23751a0SRussell King 2630d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2631d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2632d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 263326c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2634d23751a0SRussell King } 263573970055SRussell King break; 263673970055SRussell King 263773970055SRussell King case SFP_S_WAIT_LOS: 263873970055SRussell King if (event == SFP_E_TX_FAULT) 263963ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2640710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 264173970055SRussell King sfp_sm_link_up(sfp); 264273970055SRussell King break; 264373970055SRussell King 264473970055SRussell King case SFP_S_LINK_UP: 264573970055SRussell King if (event == SFP_E_TX_FAULT) { 264673970055SRussell King sfp_sm_link_down(sfp); 264763ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2648710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 264973970055SRussell King sfp_sm_link_down(sfp); 265073970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 265173970055SRussell King } 265273970055SRussell King break; 265373970055SRussell King 265473970055SRussell King case SFP_S_TX_FAULT: 265573970055SRussell King if (event == SFP_E_TIMEOUT) { 265673970055SRussell King sfp_module_tx_fault_reset(sfp); 265726c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 265873970055SRussell King } 265973970055SRussell King break; 266073970055SRussell King 266173970055SRussell King case SFP_S_REINIT: 266273970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 266363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 266473970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 266573970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 266673970055SRussell King sfp_sm_link_check_los(sfp); 266773970055SRussell King } 266873970055SRussell King break; 266973970055SRussell King 267073970055SRussell King case SFP_S_TX_DISABLE: 267173970055SRussell King break; 267273970055SRussell King } 2673e85d81a1SRussell King } 2674e85d81a1SRussell King 267597a49205SRussell King (Oracle) static void __sfp_sm_event(struct sfp *sfp, unsigned int event) 2676e85d81a1SRussell King { 2677e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2678e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2679e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2680e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2681e85d81a1SRussell King event_to_str(event)); 2682e85d81a1SRussell King 2683e85d81a1SRussell King sfp_sm_device(sfp, event); 26846b0da5c9SRussell King sfp_sm_module(sfp, event); 2685e85d81a1SRussell King sfp_sm_main(sfp, event); 268673970055SRussell King 26874005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 26884005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 26894005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 26904005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 269197a49205SRussell King (Oracle) } 269273970055SRussell King 269397a49205SRussell King (Oracle) static void sfp_sm_event(struct sfp *sfp, unsigned int event) 269497a49205SRussell King (Oracle) { 269597a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 269697a49205SRussell King (Oracle) __sfp_sm_event(sfp, event); 269773970055SRussell King mutex_unlock(&sfp->sm_mutex); 269873970055SRussell King } 269973970055SRussell King 2700b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2701b5bfc21aSRussell King { 27026b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2703b5bfc21aSRussell King } 2704b5bfc21aSRussell King 2705b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2706b5bfc21aSRussell King { 27076b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2708b5bfc21aSRussell King } 2709b5bfc21aSRussell King 271073970055SRussell King static void sfp_start(struct sfp *sfp) 271173970055SRussell King { 271273970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 271373970055SRussell King } 271473970055SRussell King 271573970055SRussell King static void sfp_stop(struct sfp *sfp) 271673970055SRussell King { 271773970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 271873970055SRussell King } 271973970055SRussell King 2720dc185822SRussell King (Oracle) static void sfp_set_signal_rate(struct sfp *sfp, unsigned int rate_kbd) 2721dc185822SRussell King (Oracle) { 2722fc082b39SRussell King (Oracle) unsigned int set; 2723fc082b39SRussell King (Oracle) 2724fc082b39SRussell King (Oracle) sfp->rate_kbd = rate_kbd; 2725fc082b39SRussell King (Oracle) 2726fc082b39SRussell King (Oracle) if (rate_kbd > sfp->rs_threshold_kbd) 2727fc082b39SRussell King (Oracle) set = sfp->rs_state_mask; 2728fc082b39SRussell King (Oracle) else 2729fc082b39SRussell King (Oracle) set = 0; 2730fc082b39SRussell King (Oracle) 2731fc082b39SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_RS0 | SFP_F_RS1, set); 2732dc185822SRussell King (Oracle) } 2733dc185822SRussell King (Oracle) 273473970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 273573970055SRussell King { 273673970055SRussell King /* locking... and check module is present */ 273773970055SRussell King 2738ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2739ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 274073970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 274173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 274273970055SRussell King } else { 274373970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 274473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 274573970055SRussell King } 274673970055SRussell King return 0; 274773970055SRussell King } 274873970055SRussell King 274973970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 275073970055SRussell King u8 *data) 275173970055SRussell King { 275273970055SRussell King unsigned int first, last, len; 275373970055SRussell King int ret; 275473970055SRussell King 2755bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2756bef227c1SIvan Bornyakov return -ENODEV; 2757bef227c1SIvan Bornyakov 275873970055SRussell King if (ee->len == 0) 275973970055SRussell King return -EINVAL; 276073970055SRussell King 276173970055SRussell King first = ee->offset; 276273970055SRussell King last = ee->offset + ee->len; 276373970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 276473970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 276573970055SRussell King len -= first; 276673970055SRussell King 27672794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 276873970055SRussell King if (ret < 0) 276973970055SRussell King return ret; 277073970055SRussell King 277173970055SRussell King first += len; 277273970055SRussell King data += len; 277373970055SRussell King } 27742794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 277573970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 277673970055SRussell King len -= first; 277773970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 277873970055SRussell King 27792794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 278073970055SRussell King if (ret < 0) 278173970055SRussell King return ret; 278273970055SRussell King } 278373970055SRussell King return 0; 278473970055SRussell King } 278573970055SRussell King 2786d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2787d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2788d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2789d740513fSAndrew Lunn { 2790bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2791bef227c1SIvan Bornyakov return -ENODEV; 2792bef227c1SIvan Bornyakov 2793d740513fSAndrew Lunn if (page->bank) { 2794d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2795d740513fSAndrew Lunn return -EOPNOTSUPP; 2796d740513fSAndrew Lunn } 2797d740513fSAndrew Lunn 2798d740513fSAndrew Lunn if (page->page) { 2799d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2800d740513fSAndrew Lunn return -EOPNOTSUPP; 2801d740513fSAndrew Lunn } 2802d740513fSAndrew Lunn 2803d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2804d740513fSAndrew Lunn page->i2c_address != 0x51) { 2805d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2806d740513fSAndrew Lunn return -EOPNOTSUPP; 2807d740513fSAndrew Lunn } 2808d740513fSAndrew Lunn 2809d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2810d740513fSAndrew Lunn page->data, page->length); 2811d740513fSAndrew Lunn }; 2812d740513fSAndrew Lunn 281373970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2814b5bfc21aSRussell King .attach = sfp_attach, 2815b5bfc21aSRussell King .detach = sfp_detach, 281673970055SRussell King .start = sfp_start, 281773970055SRussell King .stop = sfp_stop, 2818dc185822SRussell King (Oracle) .set_signal_rate = sfp_set_signal_rate, 281973970055SRussell King .module_info = sfp_module_info, 282073970055SRussell King .module_eeprom = sfp_module_eeprom, 2821d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 282273970055SRussell King }; 282373970055SRussell King 282473970055SRussell King static void sfp_timeout(struct work_struct *work) 282573970055SRussell King { 282673970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 282773970055SRussell King 282873970055SRussell King rtnl_lock(); 282973970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 283073970055SRussell King rtnl_unlock(); 283173970055SRussell King } 283273970055SRussell King 283373970055SRussell King static void sfp_check_state(struct sfp *sfp) 283473970055SRussell King { 283573970055SRussell King unsigned int state, i, changed; 283673970055SRussell King 2837d47e5a43SRussell King (Oracle) rtnl_lock(); 2838a9fe964eSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 283973970055SRussell King state = sfp_get_state(sfp); 284073970055SRussell King changed = state ^ sfp->state; 28412069624dSMatthew Hagan if (sfp->tx_fault_ignore) 28422069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 28432069624dSMatthew Hagan else 284473970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 284573970055SRussell King 284673970055SRussell King for (i = 0; i < GPIO_MAX; i++) 284773970055SRussell King if (changed & BIT(i)) 2848f35cb547SRussell King (Oracle) dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_names[i], 284973970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 285073970055SRussell King 2851fc082b39SRussell King (Oracle) state |= sfp->state & SFP_F_OUTPUTS; 285273970055SRussell King sfp->state = state; 28531974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 285473970055SRussell King 285597a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 285673970055SRussell King if (changed & SFP_F_PRESENT) 285797a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_PRESENT ? 285873970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 285973970055SRussell King 286073970055SRussell King if (changed & SFP_F_TX_FAULT) 286197a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 286273970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 286373970055SRussell King 286473970055SRussell King if (changed & SFP_F_LOS) 286597a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_LOS ? 286673970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 286797a49205SRussell King (Oracle) mutex_unlock(&sfp->sm_mutex); 2868a9fe964eSRussell King (Oracle) rtnl_unlock(); 286973970055SRussell King } 287073970055SRussell King 287173970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 287273970055SRussell King { 287373970055SRussell King struct sfp *sfp = data; 287473970055SRussell King 287573970055SRussell King sfp_check_state(sfp); 287673970055SRussell King 287773970055SRussell King return IRQ_HANDLED; 287873970055SRussell King } 287973970055SRussell King 288073970055SRussell King static void sfp_poll(struct work_struct *work) 288173970055SRussell King { 288273970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 288373970055SRussell King 288473970055SRussell King sfp_check_state(sfp); 2885f3c9a666SRussell King 28861974fd3bSRussell King (Oracle) // st_mutex doesn't need to be held here for state_soft_mask, 28871974fd3bSRussell King (Oracle) // it's unimportant if we race while reading this. 2888f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2889f3c9a666SRussell King sfp->need_poll) 289073970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 289173970055SRussell King } 289273970055SRussell King 289373970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 289473970055SRussell King { 289573970055SRussell King struct sfp *sfp; 289673970055SRussell King 289773970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 289873970055SRussell King if (!sfp) 289973970055SRussell King return ERR_PTR(-ENOMEM); 290073970055SRussell King 290173970055SRussell King sfp->dev = dev; 2902813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 290373970055SRussell King 290473970055SRussell King mutex_init(&sfp->sm_mutex); 29052158e856SRobert Hancock mutex_init(&sfp->st_mutex); 290673970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 290773970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 290873970055SRussell King 2909139d3a21SRussell King sfp_hwmon_init(sfp); 2910139d3a21SRussell King 291173970055SRussell King return sfp; 291273970055SRussell King } 291373970055SRussell King 291473970055SRussell King static void sfp_cleanup(void *data) 291573970055SRussell King { 291673970055SRussell King struct sfp *sfp = data; 291773970055SRussell King 2918139d3a21SRussell King sfp_hwmon_exit(sfp); 2919139d3a21SRussell King 292073970055SRussell King cancel_delayed_work_sync(&sfp->poll); 292173970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 292273970055SRussell King if (sfp->i2c_mii) { 292373970055SRussell King mdiobus_unregister(sfp->i2c_mii); 292473970055SRussell King mdiobus_free(sfp->i2c_mii); 292573970055SRussell King } 292673970055SRussell King if (sfp->i2c) 292773970055SRussell King i2c_put_adapter(sfp->i2c); 292873970055SRussell King kfree(sfp); 292973970055SRussell King } 293073970055SRussell King 293115309fb2SRussell King (Oracle) static int sfp_i2c_get(struct sfp *sfp) 293215309fb2SRussell King (Oracle) { 293315309fb2SRussell King (Oracle) struct fwnode_handle *h; 293415309fb2SRussell King (Oracle) struct i2c_adapter *i2c; 293515309fb2SRussell King (Oracle) int err; 293615309fb2SRussell King (Oracle) 293715309fb2SRussell King (Oracle) h = fwnode_find_reference(dev_fwnode(sfp->dev), "i2c-bus", 0); 293815309fb2SRussell King (Oracle) if (IS_ERR(h)) { 293915309fb2SRussell King (Oracle) dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 294015309fb2SRussell King (Oracle) return -ENODEV; 294115309fb2SRussell King (Oracle) } 294215309fb2SRussell King (Oracle) 2943ff31a0c4SRussell King (Oracle) i2c = i2c_get_adapter_by_fwnode(h); 294415309fb2SRussell King (Oracle) if (!i2c) { 294515309fb2SRussell King (Oracle) err = -EPROBE_DEFER; 294615309fb2SRussell King (Oracle) goto put; 294715309fb2SRussell King (Oracle) } 294815309fb2SRussell King (Oracle) 294915309fb2SRussell King (Oracle) err = sfp_i2c_configure(sfp, i2c); 295015309fb2SRussell King (Oracle) if (err) 295115309fb2SRussell King (Oracle) i2c_put_adapter(i2c); 295215309fb2SRussell King (Oracle) put: 295315309fb2SRussell King (Oracle) fwnode_handle_put(h); 295415309fb2SRussell King (Oracle) return err; 295515309fb2SRussell King (Oracle) } 295615309fb2SRussell King (Oracle) 295773970055SRussell King static int sfp_probe(struct platform_device *pdev) 295873970055SRussell King { 2959259c8618SRussell King const struct sff_data *sff; 29605411ca71SChris Healy char *sfp_irq_name; 296173970055SRussell King struct sfp *sfp; 2962257c2559SRobert Hancock int err, i; 296373970055SRussell King 296473970055SRussell King sfp = sfp_alloc(&pdev->dev); 296573970055SRussell King if (IS_ERR(sfp)) 296673970055SRussell King return PTR_ERR(sfp); 296773970055SRussell King 296873970055SRussell King platform_set_drvdata(pdev, sfp); 296973970055SRussell King 29700a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 297173970055SRussell King if (err < 0) 297273970055SRussell King return err; 297373970055SRussell King 2974b71dda81SRussell King (Oracle) sff = device_get_match_data(sfp->dev); 2975b71dda81SRussell King (Oracle) if (!sff) 2976b71dda81SRussell King (Oracle) sff = &sfp_data; 2977259c8618SRussell King 2978b71dda81SRussell King (Oracle) sfp->type = sff; 29797ce236faSRuslan Babayev 298015309fb2SRussell King (Oracle) err = sfp_i2c_get(sfp); 298115309fb2SRussell King (Oracle) if (err) 298273970055SRussell King return err; 298373970055SRussell King 2984259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2985259c8618SRussell King if (sff->gpios & BIT(i)) { 298673970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 2987f35cb547SRussell King (Oracle) gpio_names[i], gpio_flags[i]); 298873970055SRussell King if (IS_ERR(sfp->gpio[i])) 298973970055SRussell King return PTR_ERR(sfp->gpio[i]); 299073970055SRussell King } 299173970055SRussell King 29928475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 2993fc082b39SRussell King (Oracle) sfp->state_hw_drive = SFP_F_TX_DISABLE; 29948475c4b7SRussell King (Oracle) 299573970055SRussell King sfp->get_state = sfp_gpio_get_state; 299673970055SRussell King sfp->set_state = sfp_gpio_set_state; 2997259c8618SRussell King 2998259c8618SRussell King /* Modules that have no detect signal are always present */ 2999259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 3000259c8618SRussell King sfp->get_state = sff_gpio_get_state; 300173970055SRussell King 30023bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 30033bb35261SJon Nettleton &sfp->max_power_mW); 300402eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 300502eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 300602eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 300702eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 30083bb35261SJon Nettleton sfp->max_power_mW = 1000; 300902eaf5a7SRussell King (Oracle) } 30103bb35261SJon Nettleton 30113bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 30123bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 30133bb35261SJon Nettleton 301473970055SRussell King /* Get the initial state, and always signal TX disable, 301573970055SRussell King * since the network interface will not be up. 301673970055SRussell King */ 301773970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 301873970055SRussell King 3019fc082b39SRussell King (Oracle) if (sfp->gpio[GPIO_RS0] && 3020fc082b39SRussell King (Oracle) gpiod_get_value_cansleep(sfp->gpio[GPIO_RS0])) 3021fc082b39SRussell King (Oracle) sfp->state |= SFP_F_RS0; 302273970055SRussell King sfp_set_state(sfp, sfp->state); 302373970055SRussell King sfp_module_tx_disable(sfp); 302473f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 302573f5e847SRussell King rtnl_lock(); 302673f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 302773f5e847SRussell King rtnl_unlock(); 302873f5e847SRussell King } 302973970055SRussell King 303073970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 303173970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 303273970055SRussell King continue; 303373970055SRussell King 3034257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 303596216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 303696216181SYueHaibing sfp->gpio_irq[i] = 0; 3037f3c9a666SRussell King sfp->need_poll = true; 303873970055SRussell King continue; 303973970055SRussell King } 304073970055SRussell King 30415411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 30425411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 3043f35cb547SRussell King (Oracle) gpio_names[i]); 30445411ca71SChris Healy 30458cb601f1SChris Healy if (!sfp_irq_name) 30468cb601f1SChris Healy return -ENOMEM; 30478cb601f1SChris Healy 3048257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 3049257c2559SRobert Hancock NULL, sfp_irq, 305073970055SRussell King IRQF_ONESHOT | 305173970055SRussell King IRQF_TRIGGER_RISING | 305273970055SRussell King IRQF_TRIGGER_FALLING, 30535411ca71SChris Healy sfp_irq_name, sfp); 3054257c2559SRobert Hancock if (err) { 3055257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 3056f3c9a666SRussell King sfp->need_poll = true; 305773970055SRussell King } 3058257c2559SRobert Hancock } 305973970055SRussell King 3060f3c9a666SRussell King if (sfp->need_poll) 306173970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 306273970055SRussell King 3063a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 3064a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 3065a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 3066a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 3067a1f5d1f0SAntoine Tenart */ 3068a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 3069a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 3070a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 3071a1f5d1f0SAntoine Tenart 3072b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 3073b5bfc21aSRussell King if (!sfp->sfp_bus) 3074b5bfc21aSRussell King return -ENOMEM; 3075b5bfc21aSRussell King 30769cc8976cSRussell King sfp_debugfs_init(sfp); 30779cc8976cSRussell King 307873970055SRussell King return 0; 307973970055SRussell King } 308073970055SRussell King 308173970055SRussell King static int sfp_remove(struct platform_device *pdev) 308273970055SRussell King { 308373970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 308473970055SRussell King 30859cc8976cSRussell King sfp_debugfs_exit(sfp); 308673970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 308773970055SRussell King 30880cb96b57SRussell King rtnl_lock(); 30890cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 30900cb96b57SRussell King rtnl_unlock(); 30910cb96b57SRussell King 309273970055SRussell King return 0; 309373970055SRussell King } 309473970055SRussell King 3095257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 3096257c2559SRobert Hancock { 3097257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 3098257c2559SRobert Hancock int i; 3099257c2559SRobert Hancock 3100257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 3101257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 3102257c2559SRobert Hancock continue; 3103257c2559SRobert Hancock 3104257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 3105257c2559SRobert Hancock } 3106257c2559SRobert Hancock 3107257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 3108257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 3109257c2559SRobert Hancock } 3110257c2559SRobert Hancock 311173970055SRussell King static struct platform_driver sfp_driver = { 311273970055SRussell King .probe = sfp_probe, 311373970055SRussell King .remove = sfp_remove, 3114257c2559SRobert Hancock .shutdown = sfp_shutdown, 311573970055SRussell King .driver = { 311673970055SRussell King .name = "sfp", 311773970055SRussell King .of_match_table = sfp_of_match, 311873970055SRussell King }, 311973970055SRussell King }; 312073970055SRussell King 312173970055SRussell King static int sfp_init(void) 312273970055SRussell King { 312373970055SRussell King poll_jiffies = msecs_to_jiffies(100); 312473970055SRussell King 312573970055SRussell King return platform_driver_register(&sfp_driver); 312673970055SRussell King } 312773970055SRussell King module_init(sfp_init); 312873970055SRussell King 312973970055SRussell King static void sfp_exit(void) 313073970055SRussell King { 313173970055SRussell King platform_driver_unregister(&sfp_driver); 313273970055SRussell King } 313373970055SRussell King module_exit(sfp_exit); 313473970055SRussell King 313573970055SRussell King MODULE_ALIAS("platform:sfp"); 313673970055SRussell King MODULE_AUTHOR("Russell King"); 313773970055SRussell King MODULE_LICENSE("GPL v2"); 3138