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, 2773970055SRussell King GPIO_RATE_SELECT, 2873970055SRussell King GPIO_MAX, 2973970055SRussell King 3073970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3173970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3273970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3373970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3473970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3573970055SRussell King 3673970055SRussell King SFP_E_INSERT = 0, 3773970055SRussell King SFP_E_REMOVE, 386b0da5c9SRussell King SFP_E_DEV_ATTACH, 396b0da5c9SRussell King SFP_E_DEV_DETACH, 4073970055SRussell King SFP_E_DEV_DOWN, 4173970055SRussell King SFP_E_DEV_UP, 4273970055SRussell King SFP_E_TX_FAULT, 4373970055SRussell King SFP_E_TX_CLEAR, 4473970055SRussell King SFP_E_LOS_HIGH, 4573970055SRussell King SFP_E_LOS_LOW, 4673970055SRussell King SFP_E_TIMEOUT, 4773970055SRussell King 4873970055SRussell King SFP_MOD_EMPTY = 0, 4973f5e847SRussell King SFP_MOD_ERROR, 5073970055SRussell King SFP_MOD_PROBE, 5173f5e847SRussell King SFP_MOD_WAITDEV, 523bb35261SJon Nettleton SFP_MOD_HPOWER, 53b036a554SRussell King SFP_MOD_WAITPWR, 5473970055SRussell King SFP_MOD_PRESENT, 5573970055SRussell King 566b0da5c9SRussell King SFP_DEV_DETACHED = 0, 576b0da5c9SRussell King SFP_DEV_DOWN, 5873970055SRussell King SFP_DEV_UP, 5973970055SRussell King 6073970055SRussell King SFP_S_DOWN = 0, 6174c551caSRussell King SFP_S_FAIL, 62eefa6f1fSRussell King SFP_S_WAIT, 6373970055SRussell King SFP_S_INIT, 641cb89a14SRussell King SFP_S_INIT_PHY, 65d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6673970055SRussell King SFP_S_WAIT_LOS, 6773970055SRussell King SFP_S_LINK_UP, 6873970055SRussell King SFP_S_TX_FAULT, 6973970055SRussell King SFP_S_REINIT, 7073970055SRussell King SFP_S_TX_DISABLE, 7173970055SRussell King }; 7273970055SRussell King 734005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 744005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7573f5e847SRussell King [SFP_MOD_ERROR] = "error", 764005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7773f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 784005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 79b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 804005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 814005a7cbSAndrew Lunn }; 824005a7cbSAndrew Lunn 834005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 844005a7cbSAndrew Lunn { 854005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 864005a7cbSAndrew Lunn return "Unknown module state"; 874005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 884005a7cbSAndrew Lunn } 894005a7cbSAndrew Lunn 904005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 916b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 924005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 934005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 944005a7cbSAndrew Lunn }; 954005a7cbSAndrew Lunn 964005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 974005a7cbSAndrew Lunn { 984005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 994005a7cbSAndrew Lunn return "Unknown device state"; 1004005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1014005a7cbSAndrew Lunn } 1024005a7cbSAndrew Lunn 1034005a7cbSAndrew Lunn static const char * const event_strings[] = { 1044005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1054005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1066b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1076b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1084005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1094005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1104005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1114005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1124005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1134005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1144005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1154005a7cbSAndrew Lunn }; 1164005a7cbSAndrew Lunn 1174005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1184005a7cbSAndrew Lunn { 1194005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1204005a7cbSAndrew Lunn return "Unknown event"; 1214005a7cbSAndrew Lunn return event_strings[event]; 1224005a7cbSAndrew Lunn } 1234005a7cbSAndrew Lunn 1244005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1254005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 12674c551caSRussell King [SFP_S_FAIL] = "fail", 127eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1284005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1291cb89a14SRussell King [SFP_S_INIT_PHY] = "init_phy", 130d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1314005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1324005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1334005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1344005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 13525a9da66SSean Anderson [SFP_S_TX_DISABLE] = "tx_disable", 1364005a7cbSAndrew Lunn }; 1374005a7cbSAndrew Lunn 1384005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1394005a7cbSAndrew Lunn { 1404005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1414005a7cbSAndrew Lunn return "Unknown state"; 1424005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1434005a7cbSAndrew Lunn } 1444005a7cbSAndrew Lunn 145f35cb547SRussell King (Oracle) static const char *gpio_names[] = { 14625ee0793SBaruch Siach "mod-def0", 14773970055SRussell King "los", 14873970055SRussell King "tx-fault", 14973970055SRussell King "tx-disable", 15025ee0793SBaruch Siach "rate-select0", 15173970055SRussell King }; 15273970055SRussell King 15373970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15473970055SRussell King GPIOD_IN, 15573970055SRussell King GPIOD_IN, 15673970055SRussell King GPIOD_IN, 15773970055SRussell King GPIOD_ASIS, 15873970055SRussell King GPIOD_ASIS, 15973970055SRussell King }; 16073970055SRussell King 16126c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16226c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16326c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 16426c97a2dSRussell King * on board (for a copper SFP) time to initialise. 16526c97a2dSRussell King */ 166eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 167324e88cbSMarek Behún #define T_WAIT_ROLLBALL msecs_to_jiffies(25000) 16826c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 16926c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17026c97a2dSRussell King 17126c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17226c97a2dSRussell King * an indicated TX_FAULT. 17326c97a2dSRussell King */ 17473970055SRussell King #define T_RESET_US 10 17573970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 17673970055SRussell King 17765ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 17865ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 17965ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18065ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18165ef2d5cSRussell King */ 18265ef2d5cSRussell King #define N_FAULT_INIT 5 18365ef2d5cSRussell King #define N_FAULT 5 18465ef2d5cSRussell King 1851cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1861cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1871cb89a14SRussell King */ 1881cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1891cb89a14SRussell King #define R_PHY_RETRY 12 1901cb89a14SRussell King 19173970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19273970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19373970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 19473970055SRussell King * 195d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 196d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 19773970055SRussell King */ 198d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 1993bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 200e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 201e117be74SRussell King #define R_PROBE_RETRY_INIT 10 202e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 203e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 20473970055SRussell King 205516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 20673970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 207324e88cbSMarek Behún * RollBall SFPs access phy via SFP Enhanced Digital Diagnostic Interface 208324e88cbSMarek Behún * via address 0x51 (mdio-i2c will use RollBall protocol on this address). 20973970055SRussell King */ 21073970055SRussell King #define SFP_PHY_ADDR 22 211324e88cbSMarek Behún #define SFP_PHY_ADDR_ROLLBALL 17 21273970055SRussell King 213813c2dd7SIvan Bornyakov /* SFP_EEPROM_BLOCK_SIZE is the size of data chunk to read the EEPROM 214813c2dd7SIvan Bornyakov * at a time. Some SFP modules and also some Linux I2C drivers do not like 215813c2dd7SIvan Bornyakov * reads longer than 16 bytes. 216813c2dd7SIvan Bornyakov */ 217813c2dd7SIvan Bornyakov #define SFP_EEPROM_BLOCK_SIZE 16 218813c2dd7SIvan Bornyakov 219259c8618SRussell King struct sff_data { 220259c8618SRussell King unsigned int gpios; 221259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 222259c8618SRussell King }; 223259c8618SRussell King 22473970055SRussell King struct sfp { 22573970055SRussell King struct device *dev; 22673970055SRussell King struct i2c_adapter *i2c; 22773970055SRussell King struct mii_bus *i2c_mii; 22873970055SRussell King struct sfp_bus *sfp_bus; 229e85b1347SMarek Behún enum mdio_i2c_proto mdio_protocol; 23073970055SRussell King struct phy_device *mod_phy; 231259c8618SRussell King const struct sff_data *type; 2320d035bedSRussell King size_t i2c_block_size; 2333bb35261SJon Nettleton u32 max_power_mW; 23473970055SRussell King 23573970055SRussell King unsigned int (*get_state)(struct sfp *); 23673970055SRussell King void (*set_state)(struct sfp *, unsigned int); 23773970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2383bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 23973970055SRussell King 24073970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 241257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 24273970055SRussell King 243f3c9a666SRussell King bool need_poll; 244f3c9a666SRussell King 2452158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 2468475c4b7SRussell King (Oracle) unsigned int state_hw_mask; 247f3c9a666SRussell King unsigned int state_soft_mask; 24873970055SRussell King unsigned int state; 24973970055SRussell King struct delayed_work poll; 25073970055SRussell King struct delayed_work timeout; 2512158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 25273970055SRussell King unsigned char sm_mod_state; 253e117be74SRussell King unsigned char sm_mod_tries_init; 254e117be74SRussell King unsigned char sm_mod_tries; 25573970055SRussell King unsigned char sm_dev_state; 25673970055SRussell King unsigned short sm_state; 257281e4eabSRussell King unsigned char sm_fault_retries; 2581cb89a14SRussell King unsigned char sm_phy_retries; 25973970055SRussell King 26073970055SRussell King struct sfp_eeprom_id id; 261ed32abb1SRussell King unsigned int module_power_mW; 26226c97a2dSRussell King unsigned int module_t_start_up; 263324e88cbSMarek Behún unsigned int module_t_wait; 2642069624dSMatthew Hagan bool tx_fault_ignore; 265ed32abb1SRussell King 26623571c7bSRussell King (Oracle) const struct sfp_quirk *quirk; 26723571c7bSRussell King (Oracle) 2681323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2691323061aSAndrew Lunn struct sfp_diag diag; 270139d3a21SRussell King struct delayed_work hwmon_probe; 271139d3a21SRussell King unsigned int hwmon_tries; 2721323061aSAndrew Lunn struct device *hwmon_dev; 2731323061aSAndrew Lunn char *hwmon_name; 2741323061aSAndrew Lunn #endif 2751323061aSAndrew Lunn 2769cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2779cc8976cSRussell King struct dentry *debugfs_dir; 2789cc8976cSRussell King #endif 27973970055SRussell King }; 28073970055SRussell King 281259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 282259c8618SRussell King { 2830fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 284259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 285259c8618SRussell King } 286259c8618SRussell King 287259c8618SRussell King static const struct sff_data sff_data = { 288259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 289259c8618SRussell King .module_supported = sff_module_supported, 290259c8618SRussell King }; 291259c8618SRussell King 292259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 293259c8618SRussell King { 294f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 295f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 296f0b4f847SPali Rohár return true; 297f0b4f847SPali Rohár 298f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 299f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 300f0b4f847SPali Rohár * as supported based on vendor name and pn match. 301f0b4f847SPali Rohár */ 302f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 303f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 304f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 305f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 306f0b4f847SPali Rohár return true; 307f0b4f847SPali Rohár 308f0b4f847SPali Rohár return false; 309259c8618SRussell King } 310259c8618SRussell King 311259c8618SRussell King static const struct sff_data sfp_data = { 312259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 313259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 314259c8618SRussell King .module_supported = sfp_module_supported, 315259c8618SRussell King }; 316259c8618SRussell King 317259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 318259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 319259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 320259c8618SRussell King { }, 321259c8618SRussell King }; 322259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 323259c8618SRussell King 32427541675SRussell King (Oracle) static void sfp_fixup_long_startup(struct sfp *sfp) 32527541675SRussell King (Oracle) { 32627541675SRussell King (Oracle) sfp->module_t_start_up = T_START_UP_BAD_GPON; 32727541675SRussell King (Oracle) } 32827541675SRussell King (Oracle) 3295029be76SRussell King (Oracle) static void sfp_fixup_ignore_tx_fault(struct sfp *sfp) 3305029be76SRussell King (Oracle) { 3315029be76SRussell King (Oracle) sfp->tx_fault_ignore = true; 3325029be76SRussell King (Oracle) } 3335029be76SRussell King (Oracle) 33473472c83SRussell King (Oracle) static void sfp_fixup_halny_gsfp(struct sfp *sfp) 33573472c83SRussell King (Oracle) { 33673472c83SRussell King (Oracle) /* Ignore the TX_FAULT and LOS signals on this module. 33773472c83SRussell King (Oracle) * these are possibly used for other purposes on this 33873472c83SRussell King (Oracle) * module, e.g. a serial port. 33973472c83SRussell King (Oracle) */ 34073472c83SRussell King (Oracle) sfp->state_hw_mask &= ~(SFP_F_TX_FAULT | SFP_F_LOS); 34173472c83SRussell King (Oracle) } 34273472c83SRussell King (Oracle) 343324e88cbSMarek Behún static void sfp_fixup_rollball(struct sfp *sfp) 344324e88cbSMarek Behún { 345324e88cbSMarek Behún sfp->mdio_protocol = MDIO_I2C_ROLLBALL; 346324e88cbSMarek Behún sfp->module_t_wait = T_WAIT_ROLLBALL; 347324e88cbSMarek Behún } 348324e88cbSMarek Behún 349324e88cbSMarek Behún static void sfp_fixup_rollball_cc(struct sfp *sfp) 350324e88cbSMarek Behún { 351324e88cbSMarek Behún sfp_fixup_rollball(sfp); 352324e88cbSMarek Behún 353324e88cbSMarek Behún /* Some RollBall SFPs may have wrong (zero) extended compliance code 354324e88cbSMarek Behún * burned in EEPROM. For PHY probing we need the correct one. 355324e88cbSMarek Behún */ 356324e88cbSMarek Behún sfp->id.base.extended_cc = SFF8024_ECC_10GBASE_T_SFI; 357324e88cbSMarek Behún } 358324e88cbSMarek Behún 35923571c7bSRussell King (Oracle) static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id, 360fd580c98SRussell King unsigned long *modes, 361fd580c98SRussell King unsigned long *interfaces) 36223571c7bSRussell King (Oracle) { 36323571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, modes); 364fd580c98SRussell King __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 36523571c7bSRussell King (Oracle) } 36623571c7bSRussell King (Oracle) 36723571c7bSRussell King (Oracle) static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id, 368fd580c98SRussell King unsigned long *modes, 369fd580c98SRussell King unsigned long *interfaces) 37023571c7bSRussell King (Oracle) { 37123571c7bSRussell King (Oracle) /* Ubiquiti U-Fiber Instant module claims that support all transceiver 37223571c7bSRussell King (Oracle) * types including 10G Ethernet which is not truth. So clear all claimed 37323571c7bSRussell King (Oracle) * modes and set only one mode which module supports: 1000baseX_Full. 37423571c7bSRussell King (Oracle) */ 37523571c7bSRussell King (Oracle) linkmode_zero(modes); 37623571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, modes); 37723571c7bSRussell King (Oracle) } 37823571c7bSRussell King (Oracle) 37913c8adcfSMarek Behún #define SFP_QUIRK(_v, _p, _m, _f) \ 38013c8adcfSMarek Behún { .vendor = _v, .part = _p, .modes = _m, .fixup = _f, } 38113c8adcfSMarek Behún #define SFP_QUIRK_M(_v, _p, _m) SFP_QUIRK(_v, _p, _m, NULL) 38213c8adcfSMarek Behún #define SFP_QUIRK_F(_v, _p, _f) SFP_QUIRK(_v, _p, NULL, _f) 38313c8adcfSMarek Behún 38423571c7bSRussell King (Oracle) static const struct sfp_quirk sfp_quirks[] = { 38513c8adcfSMarek Behún // Alcatel Lucent G-010S-P can operate at 2500base-X, but incorrectly 38613c8adcfSMarek Behún // report 2500MBd NRZ in their EEPROM 38713c8adcfSMarek Behún SFP_QUIRK_M("ALCATELLUCENT", "G010SP", sfp_quirk_2500basex), 38813c8adcfSMarek Behún 38913c8adcfSMarek Behún // Alcatel Lucent G-010S-A can operate at 2500base-X, but report 3.2GBd 39023571c7bSRussell King (Oracle) // NRZ in their EEPROM 39113c8adcfSMarek Behún SFP_QUIRK("ALCATELLUCENT", "3FE46541AA", sfp_quirk_2500basex, 39213c8adcfSMarek Behún sfp_fixup_long_startup), 39313c8adcfSMarek Behún 39413c8adcfSMarek Behún SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp), 39513c8adcfSMarek Behún 396ad651d68SDaniel Golle // HG MXPD-483II-F 2.5G supports 2500Base-X, but incorrectly reports 397ad651d68SDaniel Golle // 2600MBd in their EERPOM 398ad651d68SDaniel Golle SFP_QUIRK_M("HG GENUINE", "MXPD-483II", sfp_quirk_2500basex), 399ad651d68SDaniel Golle 40013c8adcfSMarek Behún // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in 40113c8adcfSMarek Behún // their EEPROM 40213c8adcfSMarek Behún SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex, 40313c8adcfSMarek Behún sfp_fixup_ignore_tx_fault), 40413c8adcfSMarek Behún 40513c8adcfSMarek Behún // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report 40613c8adcfSMarek Behún // 2500MBd NRZ in their EEPROM 40713c8adcfSMarek Behún SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex), 40813c8adcfSMarek Behún 40913c8adcfSMarek Behún SFP_QUIRK_M("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant), 410324e88cbSMarek Behún 411324e88cbSMarek Behún SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc), 412324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc), 413324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc), 414324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), 415324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), 41623571c7bSRussell King (Oracle) }; 41723571c7bSRussell King (Oracle) 41823571c7bSRussell King (Oracle) static size_t sfp_strlen(const char *str, size_t maxlen) 41923571c7bSRussell King (Oracle) { 42023571c7bSRussell King (Oracle) size_t size, i; 42123571c7bSRussell King (Oracle) 42273472c83SRussell King (Oracle) /* Trailing characters should be filled with space chars, but 42373472c83SRussell King (Oracle) * some manufacturers can't read SFF-8472 and use NUL. 42473472c83SRussell King (Oracle) */ 42523571c7bSRussell King (Oracle) for (i = 0, size = 0; i < maxlen; i++) 42673472c83SRussell King (Oracle) if (str[i] != ' ' && str[i] != '\0') 42723571c7bSRussell King (Oracle) size = i + 1; 42823571c7bSRussell King (Oracle) 42923571c7bSRussell King (Oracle) return size; 43023571c7bSRussell King (Oracle) } 43123571c7bSRussell King (Oracle) 43223571c7bSRussell King (Oracle) static bool sfp_match(const char *qs, const char *str, size_t len) 43323571c7bSRussell King (Oracle) { 43423571c7bSRussell King (Oracle) if (!qs) 43523571c7bSRussell King (Oracle) return true; 43623571c7bSRussell King (Oracle) if (strlen(qs) != len) 43723571c7bSRussell King (Oracle) return false; 43823571c7bSRussell King (Oracle) return !strncmp(qs, str, len); 43923571c7bSRussell King (Oracle) } 44023571c7bSRussell King (Oracle) 44123571c7bSRussell King (Oracle) static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) 44223571c7bSRussell King (Oracle) { 44323571c7bSRussell King (Oracle) const struct sfp_quirk *q; 44423571c7bSRussell King (Oracle) unsigned int i; 44523571c7bSRussell King (Oracle) size_t vs, ps; 44623571c7bSRussell King (Oracle) 44723571c7bSRussell King (Oracle) vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); 44823571c7bSRussell King (Oracle) ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); 44923571c7bSRussell King (Oracle) 45023571c7bSRussell King (Oracle) for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) 45123571c7bSRussell King (Oracle) if (sfp_match(q->vendor, id->base.vendor_name, vs) && 45223571c7bSRussell King (Oracle) sfp_match(q->part, id->base.vendor_pn, ps)) 45323571c7bSRussell King (Oracle) return q; 45423571c7bSRussell King (Oracle) 45523571c7bSRussell King (Oracle) return NULL; 45623571c7bSRussell King (Oracle) } 45723571c7bSRussell King (Oracle) 45873970055SRussell King static unsigned long poll_jiffies; 45973970055SRussell King 46073970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 46173970055SRussell King { 46273970055SRussell King unsigned int i, state, v; 46373970055SRussell King 46473970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 46573970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 46673970055SRussell King continue; 46773970055SRussell King 46873970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 46973970055SRussell King if (v) 47073970055SRussell King state |= BIT(i); 47173970055SRussell King } 47273970055SRussell King 47373970055SRussell King return state; 47473970055SRussell King } 47573970055SRussell King 476259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 477259c8618SRussell King { 478259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 479259c8618SRussell King } 480259c8618SRussell King 48173970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 48273970055SRussell King { 48373970055SRussell King if (state & SFP_F_PRESENT) { 48473970055SRussell King /* If the module is present, drive the signals */ 48573970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 48673970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 48773970055SRussell King state & SFP_F_TX_DISABLE); 48873970055SRussell King if (state & SFP_F_RATE_SELECT) 48973970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 49073970055SRussell King state & SFP_F_RATE_SELECT); 49173970055SRussell King } else { 49273970055SRussell King /* Otherwise, let them float to the pull-ups */ 49373970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 49473970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 49573970055SRussell King if (state & SFP_F_RATE_SELECT) 49673970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 49773970055SRussell King } 49873970055SRussell King } 49973970055SRussell King 5003bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 5013bb35261SJon Nettleton size_t len) 50273970055SRussell King { 50373970055SRussell King struct i2c_msg msgs[2]; 504426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 505426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 50628e74a7cSRussell King size_t this_len; 50773970055SRussell King int ret; 50873970055SRussell King 50973970055SRussell King msgs[0].addr = bus_addr; 51073970055SRussell King msgs[0].flags = 0; 51173970055SRussell King msgs[0].len = 1; 51273970055SRussell King msgs[0].buf = &dev_addr; 51373970055SRussell King msgs[1].addr = bus_addr; 51473970055SRussell King msgs[1].flags = I2C_M_RD; 51573970055SRussell King msgs[1].len = len; 51673970055SRussell King msgs[1].buf = buf; 51773970055SRussell King 51828e74a7cSRussell King while (len) { 51928e74a7cSRussell King this_len = len; 5200d035bedSRussell King if (this_len > block_size) 5210d035bedSRussell King this_len = block_size; 52228e74a7cSRussell King 52328e74a7cSRussell King msgs[1].len = this_len; 52428e74a7cSRussell King 5253bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 52673970055SRussell King if (ret < 0) 52773970055SRussell King return ret; 52873970055SRussell King 52928e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 53028e74a7cSRussell King break; 53128e74a7cSRussell King 53228e74a7cSRussell King msgs[1].buf += this_len; 53328e74a7cSRussell King dev_addr += this_len; 53428e74a7cSRussell King len -= this_len; 53528e74a7cSRussell King } 53628e74a7cSRussell King 53728e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 53873970055SRussell King } 53973970055SRussell King 5403bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 54173970055SRussell King size_t len) 54273970055SRussell King { 5433bb35261SJon Nettleton struct i2c_msg msgs[1]; 5443bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 5453bb35261SJon Nettleton int ret; 5463bb35261SJon Nettleton 5473bb35261SJon Nettleton msgs[0].addr = bus_addr; 5483bb35261SJon Nettleton msgs[0].flags = 0; 5493bb35261SJon Nettleton msgs[0].len = 1 + len; 5503bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 5513bb35261SJon Nettleton if (!msgs[0].buf) 5523bb35261SJon Nettleton return -ENOMEM; 5533bb35261SJon Nettleton 5543bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 5553bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 5563bb35261SJon Nettleton 5573bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 5583bb35261SJon Nettleton 5593bb35261SJon Nettleton kfree(msgs[0].buf); 5603bb35261SJon Nettleton 5613bb35261SJon Nettleton if (ret < 0) 5623bb35261SJon Nettleton return ret; 5633bb35261SJon Nettleton 5643bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 56573970055SRussell King } 56673970055SRussell King 56773970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 56873970055SRussell King { 56973970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 57073970055SRussell King return -EINVAL; 57173970055SRussell King 57273970055SRussell King sfp->i2c = i2c; 57373970055SRussell King sfp->read = sfp_i2c_read; 5743bb35261SJon Nettleton sfp->write = sfp_i2c_write; 57573970055SRussell King 576e85b1347SMarek Behún return 0; 577e85b1347SMarek Behún } 578e85b1347SMarek Behún 579e85b1347SMarek Behún static int sfp_i2c_mdiobus_create(struct sfp *sfp) 580e85b1347SMarek Behún { 581e85b1347SMarek Behún struct mii_bus *i2c_mii; 582e85b1347SMarek Behún int ret; 583e85b1347SMarek Behún 58409bbedacSMarek Behún i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, sfp->mdio_protocol); 58573970055SRussell King if (IS_ERR(i2c_mii)) 58673970055SRussell King return PTR_ERR(i2c_mii); 58773970055SRussell King 58873970055SRussell King i2c_mii->name = "SFP I2C Bus"; 58973970055SRussell King i2c_mii->phy_mask = ~0; 59073970055SRussell King 59173970055SRussell King ret = mdiobus_register(i2c_mii); 59273970055SRussell King if (ret < 0) { 59373970055SRussell King mdiobus_free(i2c_mii); 59473970055SRussell King return ret; 59573970055SRussell King } 59673970055SRussell King 59773970055SRussell King sfp->i2c_mii = i2c_mii; 59873970055SRussell King 59973970055SRussell King return 0; 60073970055SRussell King } 60173970055SRussell King 602e85b1347SMarek Behún static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) 603e85b1347SMarek Behún { 604e85b1347SMarek Behún mdiobus_unregister(sfp->i2c_mii); 605e85b1347SMarek Behún sfp->i2c_mii = NULL; 606e85b1347SMarek Behún } 607e85b1347SMarek Behún 60873970055SRussell King /* Interface */ 60973970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 61073970055SRussell King { 61173970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 61273970055SRussell King } 61373970055SRussell King 6143bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 6153bb35261SJon Nettleton { 6163bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 6173bb35261SJon Nettleton } 6183bb35261SJon Nettleton 619a3c536fcSRussell King (Oracle) static int sfp_modify_u8(struct sfp *sfp, bool a2, u8 addr, u8 mask, u8 val) 620a3c536fcSRussell King (Oracle) { 621a3c536fcSRussell King (Oracle) int ret; 622a3c536fcSRussell King (Oracle) u8 old, v; 623a3c536fcSRussell King (Oracle) 624a3c536fcSRussell King (Oracle) ret = sfp_read(sfp, a2, addr, &old, sizeof(old)); 625a3c536fcSRussell King (Oracle) if (ret != sizeof(old)) 626a3c536fcSRussell King (Oracle) return ret; 627a3c536fcSRussell King (Oracle) 628a3c536fcSRussell King (Oracle) v = (old & ~mask) | (val & mask); 629a3c536fcSRussell King (Oracle) if (v == old) 630a3c536fcSRussell King (Oracle) return sizeof(v); 631a3c536fcSRussell King (Oracle) 632a3c536fcSRussell King (Oracle) return sfp_write(sfp, a2, addr, &v, sizeof(v)); 633a3c536fcSRussell King (Oracle) } 634a3c536fcSRussell King (Oracle) 635f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 636f3c9a666SRussell King { 637f3c9a666SRussell King unsigned int state = 0; 638f3c9a666SRussell King u8 status; 6390dea4d03SRussell King int ret; 640f3c9a666SRussell King 6410dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 6420dea4d03SRussell King if (ret == sizeof(status)) { 643f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 644f3c9a666SRussell King state |= SFP_F_LOS; 645f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 646f3c9a666SRussell King state |= SFP_F_TX_FAULT; 6470dea4d03SRussell King } else { 6480dea4d03SRussell King dev_err_ratelimited(sfp->dev, 6499ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 6509ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 6510dea4d03SRussell King /* Preserve the current state */ 6520dea4d03SRussell King state = sfp->state; 653f3c9a666SRussell King } 654f3c9a666SRussell King 655f3c9a666SRussell King return state & sfp->state_soft_mask; 656f3c9a666SRussell King } 657f3c9a666SRussell King 658f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 659f3c9a666SRussell King { 660a3c536fcSRussell King (Oracle) u8 mask = SFP_STATUS_TX_DISABLE_FORCE; 661a3c536fcSRussell King (Oracle) u8 val = 0; 662f3c9a666SRussell King 663f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 664a3c536fcSRussell King (Oracle) val |= SFP_STATUS_TX_DISABLE_FORCE; 665f3c9a666SRussell King 666a3c536fcSRussell King (Oracle) 667a3c536fcSRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); 668f3c9a666SRussell King } 669f3c9a666SRussell King 670f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 671f3c9a666SRussell King { 672f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 6738475c4b7SRussell King (Oracle) unsigned int mask = 0; 674f3c9a666SRussell King 675f3c9a666SRussell King sfp->state_soft_mask = 0; 6768475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 6778475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 6788475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 6798475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 6808475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 6818475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 6828475c4b7SRussell King (Oracle) 6838475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 6848475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 685f3c9a666SRussell King 686f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 687f3c9a666SRussell King !sfp->need_poll) 688f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 689f3c9a666SRussell King } 690f3c9a666SRussell King 691f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 692f3c9a666SRussell King { 693f3c9a666SRussell King sfp->state_soft_mask = 0; 694f3c9a666SRussell King } 695f3c9a666SRussell King 696f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 697f3c9a666SRussell King { 6988475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 6998475c4b7SRussell King (Oracle) unsigned int state; 700f3c9a666SRussell King 7018475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 7028475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 703f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 704f3c9a666SRussell King 705f3c9a666SRussell King return state; 706f3c9a666SRussell King } 707f3c9a666SRussell King 708f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 709f3c9a666SRussell King { 710f3c9a666SRussell King sfp->set_state(sfp, state); 711f3c9a666SRussell King 712f3c9a666SRussell King if (state & SFP_F_PRESENT && 713f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 714f3c9a666SRussell King sfp_soft_set_state(sfp, state); 715f3c9a666SRussell King } 716f3c9a666SRussell King 71773970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 71873970055SRussell King { 71973970055SRussell King u8 *p, check; 72073970055SRussell King 72173970055SRussell King for (p = buf, check = 0; len; p++, len--) 72273970055SRussell King check += *p; 72373970055SRussell King 72473970055SRussell King return check; 72573970055SRussell King } 72673970055SRussell King 7271323061aSAndrew Lunn /* hwmon */ 7281323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 7291323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 7301323061aSAndrew Lunn enum hwmon_sensor_types type, 7311323061aSAndrew Lunn u32 attr, int channel) 7321323061aSAndrew Lunn { 7331323061aSAndrew Lunn const struct sfp *sfp = data; 7341323061aSAndrew Lunn 7351323061aSAndrew Lunn switch (type) { 7361323061aSAndrew Lunn case hwmon_temp: 7371323061aSAndrew Lunn switch (attr) { 7381323061aSAndrew Lunn case hwmon_temp_min_alarm: 7391323061aSAndrew Lunn case hwmon_temp_max_alarm: 7401323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7411323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7421323061aSAndrew Lunn case hwmon_temp_min: 7431323061aSAndrew Lunn case hwmon_temp_max: 7441323061aSAndrew Lunn case hwmon_temp_lcrit: 7451323061aSAndrew Lunn case hwmon_temp_crit: 746a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 747a33710bdSAndrew Lunn return 0; 748df561f66SGustavo A. R. Silva fallthrough; 749a33710bdSAndrew Lunn case hwmon_temp_input: 750c1236979SAndrew Lunn case hwmon_temp_label: 7511323061aSAndrew Lunn return 0444; 7521323061aSAndrew Lunn default: 7531323061aSAndrew Lunn return 0; 7541323061aSAndrew Lunn } 7551323061aSAndrew Lunn case hwmon_in: 7561323061aSAndrew Lunn switch (attr) { 7571323061aSAndrew Lunn case hwmon_in_min_alarm: 7581323061aSAndrew Lunn case hwmon_in_max_alarm: 7591323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7601323061aSAndrew Lunn case hwmon_in_crit_alarm: 7611323061aSAndrew Lunn case hwmon_in_min: 7621323061aSAndrew Lunn case hwmon_in_max: 7631323061aSAndrew Lunn case hwmon_in_lcrit: 7641323061aSAndrew Lunn case hwmon_in_crit: 765a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 766a33710bdSAndrew Lunn return 0; 767df561f66SGustavo A. R. Silva fallthrough; 768a33710bdSAndrew Lunn case hwmon_in_input: 769c1236979SAndrew Lunn case hwmon_in_label: 7701323061aSAndrew Lunn return 0444; 7711323061aSAndrew Lunn default: 7721323061aSAndrew Lunn return 0; 7731323061aSAndrew Lunn } 7741323061aSAndrew Lunn case hwmon_curr: 7751323061aSAndrew Lunn switch (attr) { 7761323061aSAndrew Lunn case hwmon_curr_min_alarm: 7771323061aSAndrew Lunn case hwmon_curr_max_alarm: 7781323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 7791323061aSAndrew Lunn case hwmon_curr_crit_alarm: 7801323061aSAndrew Lunn case hwmon_curr_min: 7811323061aSAndrew Lunn case hwmon_curr_max: 7821323061aSAndrew Lunn case hwmon_curr_lcrit: 7831323061aSAndrew Lunn case hwmon_curr_crit: 784a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 785a33710bdSAndrew Lunn return 0; 786df561f66SGustavo A. R. Silva fallthrough; 787a33710bdSAndrew Lunn case hwmon_curr_input: 788c1236979SAndrew Lunn case hwmon_curr_label: 7891323061aSAndrew Lunn return 0444; 7901323061aSAndrew Lunn default: 7911323061aSAndrew Lunn return 0; 7921323061aSAndrew Lunn } 7931323061aSAndrew Lunn case hwmon_power: 7941323061aSAndrew Lunn /* External calibration of receive power requires 7951323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 7961323061aSAndrew Lunn * is not easy, so just skip it. If the module does 7971323061aSAndrew Lunn * not require external calibration, we can however 7981323061aSAndrew Lunn * show receiver power, since FP is then not needed. 7991323061aSAndrew Lunn */ 8001323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 8011323061aSAndrew Lunn channel == 1) 8021323061aSAndrew Lunn return 0; 8031323061aSAndrew Lunn switch (attr) { 8041323061aSAndrew Lunn case hwmon_power_min_alarm: 8051323061aSAndrew Lunn case hwmon_power_max_alarm: 8061323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 8071323061aSAndrew Lunn case hwmon_power_crit_alarm: 8081323061aSAndrew Lunn case hwmon_power_min: 8091323061aSAndrew Lunn case hwmon_power_max: 8101323061aSAndrew Lunn case hwmon_power_lcrit: 8111323061aSAndrew Lunn case hwmon_power_crit: 812a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 813a33710bdSAndrew Lunn return 0; 814df561f66SGustavo A. R. Silva fallthrough; 815a33710bdSAndrew Lunn case hwmon_power_input: 816c1236979SAndrew Lunn case hwmon_power_label: 8171323061aSAndrew Lunn return 0444; 8181323061aSAndrew Lunn default: 8191323061aSAndrew Lunn return 0; 8201323061aSAndrew Lunn } 8211323061aSAndrew Lunn default: 8221323061aSAndrew Lunn return 0; 8231323061aSAndrew Lunn } 8241323061aSAndrew Lunn } 8251323061aSAndrew Lunn 8261323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 8271323061aSAndrew Lunn { 8281323061aSAndrew Lunn __be16 val; 8291323061aSAndrew Lunn int err; 8301323061aSAndrew Lunn 8311323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 8321323061aSAndrew Lunn if (err < 0) 8331323061aSAndrew Lunn return err; 8341323061aSAndrew Lunn 8351323061aSAndrew Lunn *value = be16_to_cpu(val); 8361323061aSAndrew Lunn 8371323061aSAndrew Lunn return 0; 8381323061aSAndrew Lunn } 8391323061aSAndrew Lunn 8401323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 8411323061aSAndrew Lunn { 8420cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8431323061aSAndrew Lunn } 8441323061aSAndrew Lunn 8451323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 8461323061aSAndrew Lunn long *value) 8471323061aSAndrew Lunn { 8481323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 8491323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 8501323061aSAndrew Lunn } 8511323061aSAndrew Lunn 8521323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 8531323061aSAndrew Lunn { 8541323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 8551323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 8561323061aSAndrew Lunn 8571323061aSAndrew Lunn if (*value >= 0x8000) 8581323061aSAndrew Lunn *value -= 0x10000; 8591323061aSAndrew Lunn 8601323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 8611323061aSAndrew Lunn } 8621323061aSAndrew Lunn 8631323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 8641323061aSAndrew Lunn { 8651323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 8661323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 8671323061aSAndrew Lunn 8681323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8691323061aSAndrew Lunn } 8701323061aSAndrew Lunn 8711323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 8721323061aSAndrew Lunn { 8731323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 8741323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 8751323061aSAndrew Lunn 8761323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 8771323061aSAndrew Lunn } 8781323061aSAndrew Lunn 8791323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 8801323061aSAndrew Lunn { 8811323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 8821323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 8831323061aSAndrew Lunn 8841323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8851323061aSAndrew Lunn } 8861323061aSAndrew Lunn 8871323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 8881323061aSAndrew Lunn { 8891323061aSAndrew Lunn int err; 8901323061aSAndrew Lunn 8911323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 8921323061aSAndrew Lunn if (err < 0) 8931323061aSAndrew Lunn return err; 8941323061aSAndrew Lunn 8951323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8961323061aSAndrew Lunn 8971323061aSAndrew Lunn return 0; 8981323061aSAndrew Lunn } 8991323061aSAndrew Lunn 9001323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 9011323061aSAndrew Lunn { 9021323061aSAndrew Lunn int err; 9031323061aSAndrew Lunn 9041323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9051323061aSAndrew Lunn if (err < 0) 9061323061aSAndrew Lunn return err; 9071323061aSAndrew Lunn 9081323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 9091323061aSAndrew Lunn 9101323061aSAndrew Lunn return 0; 9111323061aSAndrew Lunn } 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 9141323061aSAndrew Lunn { 9151323061aSAndrew Lunn int err; 9161323061aSAndrew Lunn 9171323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9181323061aSAndrew Lunn if (err < 0) 9191323061aSAndrew Lunn return err; 9201323061aSAndrew Lunn 9211323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9221323061aSAndrew Lunn 9231323061aSAndrew Lunn return 0; 9241323061aSAndrew Lunn } 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 9271323061aSAndrew Lunn { 9281323061aSAndrew Lunn int err; 9291323061aSAndrew Lunn 9301323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9311323061aSAndrew Lunn if (err < 0) 9321323061aSAndrew Lunn return err; 9331323061aSAndrew Lunn 9341323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9351323061aSAndrew Lunn 9361323061aSAndrew Lunn return 0; 9371323061aSAndrew Lunn } 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 9401323061aSAndrew Lunn { 9411323061aSAndrew Lunn int err; 9421323061aSAndrew Lunn 9431323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9441323061aSAndrew Lunn if (err < 0) 9451323061aSAndrew Lunn return err; 9461323061aSAndrew Lunn 9471323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn return 0; 9501323061aSAndrew Lunn } 9511323061aSAndrew Lunn 9521323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 9531323061aSAndrew Lunn { 9541323061aSAndrew Lunn u8 status; 9551323061aSAndrew Lunn int err; 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn switch (attr) { 9581323061aSAndrew Lunn case hwmon_temp_input: 9591323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 9601323061aSAndrew Lunn 9611323061aSAndrew Lunn case hwmon_temp_lcrit: 9621323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 9631323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9641323061aSAndrew Lunn return 0; 9651323061aSAndrew Lunn 9661323061aSAndrew Lunn case hwmon_temp_min: 9671323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 9681323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9691323061aSAndrew Lunn return 0; 9701323061aSAndrew Lunn case hwmon_temp_max: 9711323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 9721323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9731323061aSAndrew Lunn return 0; 9741323061aSAndrew Lunn 9751323061aSAndrew Lunn case hwmon_temp_crit: 9761323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 9771323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9781323061aSAndrew Lunn return 0; 9791323061aSAndrew Lunn 9801323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 9811323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9821323061aSAndrew Lunn if (err < 0) 9831323061aSAndrew Lunn return err; 9841323061aSAndrew Lunn 9851323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 9861323061aSAndrew Lunn return 0; 9871323061aSAndrew Lunn 9881323061aSAndrew Lunn case hwmon_temp_min_alarm: 9891323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9901323061aSAndrew Lunn if (err < 0) 9911323061aSAndrew Lunn return err; 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 9941323061aSAndrew Lunn return 0; 9951323061aSAndrew Lunn 9961323061aSAndrew Lunn case hwmon_temp_max_alarm: 9971323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9981323061aSAndrew Lunn if (err < 0) 9991323061aSAndrew Lunn return err; 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 10021323061aSAndrew Lunn return 0; 10031323061aSAndrew Lunn 10041323061aSAndrew Lunn case hwmon_temp_crit_alarm: 10051323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10061323061aSAndrew Lunn if (err < 0) 10071323061aSAndrew Lunn return err; 10081323061aSAndrew Lunn 10091323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 10101323061aSAndrew Lunn return 0; 10111323061aSAndrew Lunn default: 10121323061aSAndrew Lunn return -EOPNOTSUPP; 10131323061aSAndrew Lunn } 10141323061aSAndrew Lunn 10151323061aSAndrew Lunn return -EOPNOTSUPP; 10161323061aSAndrew Lunn } 10171323061aSAndrew Lunn 10181323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 10191323061aSAndrew Lunn { 10201323061aSAndrew Lunn u8 status; 10211323061aSAndrew Lunn int err; 10221323061aSAndrew Lunn 10231323061aSAndrew Lunn switch (attr) { 10241323061aSAndrew Lunn case hwmon_in_input: 10251323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 10261323061aSAndrew Lunn 10271323061aSAndrew Lunn case hwmon_in_lcrit: 10281323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 10291323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10301323061aSAndrew Lunn return 0; 10311323061aSAndrew Lunn 10321323061aSAndrew Lunn case hwmon_in_min: 10331323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 10341323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10351323061aSAndrew Lunn return 0; 10361323061aSAndrew Lunn 10371323061aSAndrew Lunn case hwmon_in_max: 10381323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 10391323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10401323061aSAndrew Lunn return 0; 10411323061aSAndrew Lunn 10421323061aSAndrew Lunn case hwmon_in_crit: 10431323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 10441323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10451323061aSAndrew Lunn return 0; 10461323061aSAndrew Lunn 10471323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 10481323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10491323061aSAndrew Lunn if (err < 0) 10501323061aSAndrew Lunn return err; 10511323061aSAndrew Lunn 10521323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 10531323061aSAndrew Lunn return 0; 10541323061aSAndrew Lunn 10551323061aSAndrew Lunn case hwmon_in_min_alarm: 10561323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10571323061aSAndrew Lunn if (err < 0) 10581323061aSAndrew Lunn return err; 10591323061aSAndrew Lunn 10601323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 10611323061aSAndrew Lunn return 0; 10621323061aSAndrew Lunn 10631323061aSAndrew Lunn case hwmon_in_max_alarm: 10641323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10651323061aSAndrew Lunn if (err < 0) 10661323061aSAndrew Lunn return err; 10671323061aSAndrew Lunn 10681323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 10691323061aSAndrew Lunn return 0; 10701323061aSAndrew Lunn 10711323061aSAndrew Lunn case hwmon_in_crit_alarm: 10721323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10731323061aSAndrew Lunn if (err < 0) 10741323061aSAndrew Lunn return err; 10751323061aSAndrew Lunn 10761323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 10771323061aSAndrew Lunn return 0; 10781323061aSAndrew Lunn default: 10791323061aSAndrew Lunn return -EOPNOTSUPP; 10801323061aSAndrew Lunn } 10811323061aSAndrew Lunn 10821323061aSAndrew Lunn return -EOPNOTSUPP; 10831323061aSAndrew Lunn } 10841323061aSAndrew Lunn 10851323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 10861323061aSAndrew Lunn { 10871323061aSAndrew Lunn u8 status; 10881323061aSAndrew Lunn int err; 10891323061aSAndrew Lunn 10901323061aSAndrew Lunn switch (attr) { 10911323061aSAndrew Lunn case hwmon_curr_input: 10921323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 10931323061aSAndrew Lunn 10941323061aSAndrew Lunn case hwmon_curr_lcrit: 10951323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 10961323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10971323061aSAndrew Lunn return 0; 10981323061aSAndrew Lunn 10991323061aSAndrew Lunn case hwmon_curr_min: 11001323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 11011323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11021323061aSAndrew Lunn return 0; 11031323061aSAndrew Lunn 11041323061aSAndrew Lunn case hwmon_curr_max: 11051323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 11061323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11071323061aSAndrew Lunn return 0; 11081323061aSAndrew Lunn 11091323061aSAndrew Lunn case hwmon_curr_crit: 11101323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 11111323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11121323061aSAndrew Lunn return 0; 11131323061aSAndrew Lunn 11141323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 11151323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11161323061aSAndrew Lunn if (err < 0) 11171323061aSAndrew Lunn return err; 11181323061aSAndrew Lunn 11191323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 11201323061aSAndrew Lunn return 0; 11211323061aSAndrew Lunn 11221323061aSAndrew Lunn case hwmon_curr_min_alarm: 11231323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11241323061aSAndrew Lunn if (err < 0) 11251323061aSAndrew Lunn return err; 11261323061aSAndrew Lunn 11271323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 11281323061aSAndrew Lunn return 0; 11291323061aSAndrew Lunn 11301323061aSAndrew Lunn case hwmon_curr_max_alarm: 11311323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11321323061aSAndrew Lunn if (err < 0) 11331323061aSAndrew Lunn return err; 11341323061aSAndrew Lunn 11351323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 11361323061aSAndrew Lunn return 0; 11371323061aSAndrew Lunn 11381323061aSAndrew Lunn case hwmon_curr_crit_alarm: 11391323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11401323061aSAndrew Lunn if (err < 0) 11411323061aSAndrew Lunn return err; 11421323061aSAndrew Lunn 11431323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 11441323061aSAndrew Lunn return 0; 11451323061aSAndrew Lunn default: 11461323061aSAndrew Lunn return -EOPNOTSUPP; 11471323061aSAndrew Lunn } 11481323061aSAndrew Lunn 11491323061aSAndrew Lunn return -EOPNOTSUPP; 11501323061aSAndrew Lunn } 11511323061aSAndrew Lunn 11521323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 11531323061aSAndrew Lunn { 11541323061aSAndrew Lunn u8 status; 11551323061aSAndrew Lunn int err; 11561323061aSAndrew Lunn 11571323061aSAndrew Lunn switch (attr) { 11581323061aSAndrew Lunn case hwmon_power_input: 11591323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 11601323061aSAndrew Lunn 11611323061aSAndrew Lunn case hwmon_power_lcrit: 11621323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 11631323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11641323061aSAndrew Lunn return 0; 11651323061aSAndrew Lunn 11661323061aSAndrew Lunn case hwmon_power_min: 11671323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 11681323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11691323061aSAndrew Lunn return 0; 11701323061aSAndrew Lunn 11711323061aSAndrew Lunn case hwmon_power_max: 11721323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 11731323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11741323061aSAndrew Lunn return 0; 11751323061aSAndrew Lunn 11761323061aSAndrew Lunn case hwmon_power_crit: 11771323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 11781323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11791323061aSAndrew Lunn return 0; 11801323061aSAndrew Lunn 11811323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 11821323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11831323061aSAndrew Lunn if (err < 0) 11841323061aSAndrew Lunn return err; 11851323061aSAndrew Lunn 11861323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 11871323061aSAndrew Lunn return 0; 11881323061aSAndrew Lunn 11891323061aSAndrew Lunn case hwmon_power_min_alarm: 11901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11911323061aSAndrew Lunn if (err < 0) 11921323061aSAndrew Lunn return err; 11931323061aSAndrew Lunn 11941323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 11951323061aSAndrew Lunn return 0; 11961323061aSAndrew Lunn 11971323061aSAndrew Lunn case hwmon_power_max_alarm: 11981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11991323061aSAndrew Lunn if (err < 0) 12001323061aSAndrew Lunn return err; 12011323061aSAndrew Lunn 12021323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 12031323061aSAndrew Lunn return 0; 12041323061aSAndrew Lunn 12051323061aSAndrew Lunn case hwmon_power_crit_alarm: 12061323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12071323061aSAndrew Lunn if (err < 0) 12081323061aSAndrew Lunn return err; 12091323061aSAndrew Lunn 12101323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 12111323061aSAndrew Lunn return 0; 12121323061aSAndrew Lunn default: 12131323061aSAndrew Lunn return -EOPNOTSUPP; 12141323061aSAndrew Lunn } 12151323061aSAndrew Lunn 12161323061aSAndrew Lunn return -EOPNOTSUPP; 12171323061aSAndrew Lunn } 12181323061aSAndrew Lunn 12191323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 12201323061aSAndrew Lunn { 12211323061aSAndrew Lunn u8 status; 12221323061aSAndrew Lunn int err; 12231323061aSAndrew Lunn 12241323061aSAndrew Lunn switch (attr) { 12251323061aSAndrew Lunn case hwmon_power_input: 12261323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 12271323061aSAndrew Lunn 12281323061aSAndrew Lunn case hwmon_power_lcrit: 12291323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 12301323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12311323061aSAndrew Lunn return 0; 12321323061aSAndrew Lunn 12331323061aSAndrew Lunn case hwmon_power_min: 12341323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 12351323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12361323061aSAndrew Lunn return 0; 12371323061aSAndrew Lunn 12381323061aSAndrew Lunn case hwmon_power_max: 12391323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 12401323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12411323061aSAndrew Lunn return 0; 12421323061aSAndrew Lunn 12431323061aSAndrew Lunn case hwmon_power_crit: 12441323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 12451323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12461323061aSAndrew Lunn return 0; 12471323061aSAndrew Lunn 12481323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12501323061aSAndrew Lunn if (err < 0) 12511323061aSAndrew Lunn return err; 12521323061aSAndrew Lunn 12531323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 12541323061aSAndrew Lunn return 0; 12551323061aSAndrew Lunn 12561323061aSAndrew Lunn case hwmon_power_min_alarm: 12571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12581323061aSAndrew Lunn if (err < 0) 12591323061aSAndrew Lunn return err; 12601323061aSAndrew Lunn 12611323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 12621323061aSAndrew Lunn return 0; 12631323061aSAndrew Lunn 12641323061aSAndrew Lunn case hwmon_power_max_alarm: 12651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12661323061aSAndrew Lunn if (err < 0) 12671323061aSAndrew Lunn return err; 12681323061aSAndrew Lunn 12691323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 12701323061aSAndrew Lunn return 0; 12711323061aSAndrew Lunn 12721323061aSAndrew Lunn case hwmon_power_crit_alarm: 12731323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12741323061aSAndrew Lunn if (err < 0) 12751323061aSAndrew Lunn return err; 12761323061aSAndrew Lunn 12771323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 12781323061aSAndrew Lunn return 0; 12791323061aSAndrew Lunn default: 12801323061aSAndrew Lunn return -EOPNOTSUPP; 12811323061aSAndrew Lunn } 12821323061aSAndrew Lunn 12831323061aSAndrew Lunn return -EOPNOTSUPP; 12841323061aSAndrew Lunn } 12851323061aSAndrew Lunn 12861323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 12871323061aSAndrew Lunn u32 attr, int channel, long *value) 12881323061aSAndrew Lunn { 12891323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 12901323061aSAndrew Lunn 12911323061aSAndrew Lunn switch (type) { 12921323061aSAndrew Lunn case hwmon_temp: 12931323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 12941323061aSAndrew Lunn case hwmon_in: 12951323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 12961323061aSAndrew Lunn case hwmon_curr: 12971323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 12981323061aSAndrew Lunn case hwmon_power: 12991323061aSAndrew Lunn switch (channel) { 13001323061aSAndrew Lunn case 0: 13011323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 13021323061aSAndrew Lunn case 1: 13031323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 13041323061aSAndrew Lunn default: 13051323061aSAndrew Lunn return -EOPNOTSUPP; 13061323061aSAndrew Lunn } 13071323061aSAndrew Lunn default: 13081323061aSAndrew Lunn return -EOPNOTSUPP; 13091323061aSAndrew Lunn } 13101323061aSAndrew Lunn } 13111323061aSAndrew Lunn 1312c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1313c1236979SAndrew Lunn "TX_power", 1314c1236979SAndrew Lunn "RX_power", 1315c1236979SAndrew Lunn }; 1316c1236979SAndrew Lunn 1317c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1318c1236979SAndrew Lunn enum hwmon_sensor_types type, 1319c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1320c1236979SAndrew Lunn { 1321c1236979SAndrew Lunn switch (type) { 1322c1236979SAndrew Lunn case hwmon_curr: 1323c1236979SAndrew Lunn switch (attr) { 1324c1236979SAndrew Lunn case hwmon_curr_label: 1325c1236979SAndrew Lunn *str = "bias"; 1326c1236979SAndrew Lunn return 0; 1327c1236979SAndrew Lunn default: 1328c1236979SAndrew Lunn return -EOPNOTSUPP; 1329c1236979SAndrew Lunn } 1330c1236979SAndrew Lunn break; 1331c1236979SAndrew Lunn case hwmon_temp: 1332c1236979SAndrew Lunn switch (attr) { 1333c1236979SAndrew Lunn case hwmon_temp_label: 1334c1236979SAndrew Lunn *str = "temperature"; 1335c1236979SAndrew Lunn return 0; 1336c1236979SAndrew Lunn default: 1337c1236979SAndrew Lunn return -EOPNOTSUPP; 1338c1236979SAndrew Lunn } 1339c1236979SAndrew Lunn break; 1340c1236979SAndrew Lunn case hwmon_in: 1341c1236979SAndrew Lunn switch (attr) { 1342c1236979SAndrew Lunn case hwmon_in_label: 1343c1236979SAndrew Lunn *str = "VCC"; 1344c1236979SAndrew Lunn return 0; 1345c1236979SAndrew Lunn default: 1346c1236979SAndrew Lunn return -EOPNOTSUPP; 1347c1236979SAndrew Lunn } 1348c1236979SAndrew Lunn break; 1349c1236979SAndrew Lunn case hwmon_power: 1350c1236979SAndrew Lunn switch (attr) { 1351c1236979SAndrew Lunn case hwmon_power_label: 1352c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1353c1236979SAndrew Lunn return 0; 1354c1236979SAndrew Lunn default: 1355c1236979SAndrew Lunn return -EOPNOTSUPP; 1356c1236979SAndrew Lunn } 1357c1236979SAndrew Lunn break; 1358c1236979SAndrew Lunn default: 1359c1236979SAndrew Lunn return -EOPNOTSUPP; 1360c1236979SAndrew Lunn } 1361c1236979SAndrew Lunn 1362c1236979SAndrew Lunn return -EOPNOTSUPP; 1363c1236979SAndrew Lunn } 1364c1236979SAndrew Lunn 13651323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 13661323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 13671323061aSAndrew Lunn .read = sfp_hwmon_read, 1368c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 13691323061aSAndrew Lunn }; 13701323061aSAndrew Lunn 1371815f5f57SBeniamin Sandu static const struct hwmon_channel_info *sfp_hwmon_info[] = { 1372815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1373815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1374815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 13751323061aSAndrew Lunn HWMON_I_INPUT | 13761323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 13771323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 13781323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1379c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1380815f5f57SBeniamin Sandu HWMON_I_LABEL), 1381815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1382815f5f57SBeniamin Sandu HWMON_T_INPUT | 1383815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1384815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1385815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1386815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1387815f5f57SBeniamin Sandu HWMON_T_LABEL), 1388815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 13891323061aSAndrew Lunn HWMON_C_INPUT | 13901323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 13911323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 13921323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1393c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1394815f5f57SBeniamin Sandu HWMON_C_LABEL), 1395815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 13961323061aSAndrew Lunn /* Transmit power */ 13971323061aSAndrew Lunn HWMON_P_INPUT | 13981323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 13991323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 14001323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1401c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1402c1236979SAndrew Lunn HWMON_P_LABEL, 14031323061aSAndrew Lunn /* Receive power */ 14041323061aSAndrew Lunn HWMON_P_INPUT | 14051323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 14061323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 14071323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1408c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1409815f5f57SBeniamin Sandu HWMON_P_LABEL), 14101323061aSAndrew Lunn NULL, 14111323061aSAndrew Lunn }; 14121323061aSAndrew Lunn 14131323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 14141323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 14151323061aSAndrew Lunn .info = sfp_hwmon_info, 14161323061aSAndrew Lunn }; 14171323061aSAndrew Lunn 1418139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 14191323061aSAndrew Lunn { 1420139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 14213f118c44SMichael Walle int err; 14221323061aSAndrew Lunn 1423426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1424426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1425426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1426426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1427426c6cbcSPali Rohár * skip registration of hwmon device. 1428426c6cbcSPali Rohár */ 1429426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1430426c6cbcSPali Rohár dev_info(sfp->dev, 1431426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1432426c6cbcSPali Rohár dev_info(sfp->dev, 1433426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1434426c6cbcSPali Rohár return; 1435426c6cbcSPali Rohár } 1436426c6cbcSPali Rohár 1437139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1438139d3a21SRussell King if (err < 0) { 1439139d3a21SRussell King if (sfp->hwmon_tries--) { 1440139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1441139d3a21SRussell King T_PROBE_RETRY_SLOW); 1442139d3a21SRussell King } else { 14439ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 14449ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1445139d3a21SRussell King } 1446139d3a21SRussell King return; 1447139d3a21SRussell King } 1448139d3a21SRussell King 14493f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 14503f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1451139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1452139d3a21SRussell King return; 1453139d3a21SRussell King } 1454139d3a21SRussell King 1455139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1456139d3a21SRussell King sfp->hwmon_name, sfp, 1457139d3a21SRussell King &sfp_hwmon_chip_info, 1458139d3a21SRussell King NULL); 1459139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1460139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1461139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1462139d3a21SRussell King } 1463139d3a21SRussell King 1464139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1465139d3a21SRussell King { 14661323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 14671323061aSAndrew Lunn return 0; 14681323061aSAndrew Lunn 14691323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 14701323061aSAndrew Lunn return 0; 14711323061aSAndrew Lunn 14721323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 14731323061aSAndrew Lunn /* This driver in general does not support address 14741323061aSAndrew Lunn * change. 14751323061aSAndrew Lunn */ 14761323061aSAndrew Lunn return 0; 14771323061aSAndrew Lunn 1478139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1479139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 14801323061aSAndrew Lunn 1481139d3a21SRussell King return 0; 14821323061aSAndrew Lunn } 14831323061aSAndrew Lunn 14841323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 14851323061aSAndrew Lunn { 1486139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 14873e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 14881323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 14893e322474SAndrew Lunn sfp->hwmon_dev = NULL; 14901323061aSAndrew Lunn kfree(sfp->hwmon_name); 14911323061aSAndrew Lunn } 14923e322474SAndrew Lunn } 1493139d3a21SRussell King 1494139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1495139d3a21SRussell King { 1496139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1497139d3a21SRussell King 1498139d3a21SRussell King return 0; 1499139d3a21SRussell King } 1500139d3a21SRussell King 1501139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1502139d3a21SRussell King { 1503139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1504139d3a21SRussell King } 15051323061aSAndrew Lunn #else 15061323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 15071323061aSAndrew Lunn { 15081323061aSAndrew Lunn return 0; 15091323061aSAndrew Lunn } 15101323061aSAndrew Lunn 15111323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15121323061aSAndrew Lunn { 15131323061aSAndrew Lunn } 1514139d3a21SRussell King 1515139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1516139d3a21SRussell King { 1517139d3a21SRussell King return 0; 1518139d3a21SRussell King } 1519139d3a21SRussell King 1520139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1521139d3a21SRussell King { 1522139d3a21SRussell King } 15231323061aSAndrew Lunn #endif 15241323061aSAndrew Lunn 152573970055SRussell King /* Helpers */ 152673970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 152773970055SRussell King { 152873970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 152973970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 153073970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 153173970055SRussell King sfp_set_state(sfp, sfp->state); 153273970055SRussell King } 153373970055SRussell King 153473970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 153573970055SRussell King { 153673970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 153773970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 153873970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 153973970055SRussell King sfp_set_state(sfp, sfp->state); 154073970055SRussell King } 154173970055SRussell King 15429cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 15439cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 15449cc8976cSRussell King { 15459cc8976cSRussell King struct sfp *sfp = s->private; 15469cc8976cSRussell King 15479cc8976cSRussell King seq_printf(s, "Module state: %s\n", 15489cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 15499cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 15509cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 15519cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 15529cc8976cSRussell King seq_printf(s, "Device state: %s\n", 15539cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 15549cc8976cSRussell King seq_printf(s, "Main state: %s\n", 15559cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 15569cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 15579cc8976cSRussell King sfp->sm_fault_retries); 15589cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 15599cc8976cSRussell King sfp->sm_phy_retries); 15609cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 15619cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 15629cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 15639cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 15649cc8976cSRussell King return 0; 15659cc8976cSRussell King } 15669cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 15679cc8976cSRussell King 15689cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15699cc8976cSRussell King { 15709cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 15719cc8976cSRussell King 15729cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 15739cc8976cSRussell King &sfp_debug_state_fops); 15749cc8976cSRussell King } 15759cc8976cSRussell King 15769cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15779cc8976cSRussell King { 15789cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 15799cc8976cSRussell King } 15809cc8976cSRussell King #else 15819cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15829cc8976cSRussell King { 15839cc8976cSRussell King } 15849cc8976cSRussell King 15859cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15869cc8976cSRussell King { 15879cc8976cSRussell King } 15889cc8976cSRussell King #endif 15899cc8976cSRussell King 159073970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 159173970055SRussell King { 159273970055SRussell King unsigned int state = sfp->state; 159373970055SRussell King 159473970055SRussell King if (state & SFP_F_TX_DISABLE) 159573970055SRussell King return; 159673970055SRussell King 159773970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 159873970055SRussell King 159973970055SRussell King udelay(T_RESET_US); 160073970055SRussell King 160173970055SRussell King sfp_set_state(sfp, state); 160273970055SRussell King } 160373970055SRussell King 160473970055SRussell King /* SFP state machine */ 160573970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 160673970055SRussell King { 160773970055SRussell King if (timeout) 160873970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 160973970055SRussell King timeout); 161073970055SRussell King else 161173970055SRussell King cancel_delayed_work(&sfp->timeout); 161273970055SRussell King } 161373970055SRussell King 161473970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 161573970055SRussell King unsigned int timeout) 161673970055SRussell King { 161773970055SRussell King sfp->sm_state = state; 161873970055SRussell King sfp_sm_set_timer(sfp, timeout); 161973970055SRussell King } 162073970055SRussell King 16210936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1622516b29edSFlorian Fainelli unsigned int timeout) 162373970055SRussell King { 162473970055SRussell King sfp->sm_mod_state = state; 162573970055SRussell King sfp_sm_set_timer(sfp, timeout); 162673970055SRussell King } 162773970055SRussell King 162873970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 162973970055SRussell King { 163073970055SRussell King sfp_remove_phy(sfp->sfp_bus); 163173970055SRussell King phy_device_remove(sfp->mod_phy); 163273970055SRussell King phy_device_free(sfp->mod_phy); 163373970055SRussell King sfp->mod_phy = NULL; 163473970055SRussell King } 163573970055SRussell King 1636324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 163773970055SRussell King { 163873970055SRussell King struct phy_device *phy; 163973970055SRussell King int err; 164073970055SRussell King 1641324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 16421cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 16431cb89a14SRussell King return PTR_ERR(phy); 164420b56ed9SRussell King if (IS_ERR(phy)) { 16459ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1646256e43cbSRussell King return PTR_ERR(phy); 164773970055SRussell King } 164873970055SRussell King 16499a484621SRussell King err = phy_device_register(phy); 16509a484621SRussell King if (err) { 16519a484621SRussell King phy_device_free(phy); 16529ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 16539ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1654256e43cbSRussell King return err; 16559a484621SRussell King } 16569a484621SRussell King 165773970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 165873970055SRussell King if (err) { 165973970055SRussell King phy_device_remove(phy); 166073970055SRussell King phy_device_free(phy); 16619ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1662256e43cbSRussell King return err; 166373970055SRussell King } 166473970055SRussell King 166573970055SRussell King sfp->mod_phy = phy; 1666256e43cbSRussell King 1667256e43cbSRussell King return 0; 166873970055SRussell King } 166973970055SRussell King 167073970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 167173970055SRussell King { 167273970055SRussell King sfp_link_up(sfp->sfp_bus); 167373970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 167473970055SRussell King } 167573970055SRussell King 167673970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 167773970055SRussell King { 167873970055SRussell King sfp_link_down(sfp->sfp_bus); 167973970055SRussell King } 168073970055SRussell King 168173970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 168273970055SRussell King { 1683624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1684624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1685624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1686624407d2SRussell King bool los = false; 168773970055SRussell King 1688710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1689624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1690624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 169173970055SRussell King */ 1692624407d2SRussell King if (los_options == los_inverted) 1693624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1694624407d2SRussell King else if (los_options == los_normal) 1695624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 169673970055SRussell King 169773970055SRussell King if (los) 169873970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 169973970055SRussell King else 170073970055SRussell King sfp_sm_link_up(sfp); 170173970055SRussell King } 170273970055SRussell King 1703710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1704710dfbb0SRussell King { 1705624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1706624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1707624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1708624407d2SRussell King 1709624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1710624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1711710dfbb0SRussell King } 1712710dfbb0SRussell King 1713710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1714710dfbb0SRussell King { 1715624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1716624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1717624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1718624407d2SRussell King 1719624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1720624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1721710dfbb0SRussell King } 1722710dfbb0SRussell King 172363ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 172473970055SRussell King { 1725281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1726516b29edSFlorian Fainelli dev_err(sfp->dev, 1727516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 172873970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 172973970055SRussell King } else { 173073970055SRussell King if (warn) 173173970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 173273970055SRussell King 173363ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 173473970055SRussell King } 173573970055SRussell King } 173673970055SRussell King 1737e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1738e85b1347SMarek Behún { 1739e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1740e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1741e85b1347SMarek Behún 1742e85b1347SMarek Behún return 0; 1743e85b1347SMarek Behún } 1744e85b1347SMarek Behún 17459a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 17469a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 17479a484621SRussell King * or clause 45 PHY. 17489a484621SRussell King * 17499a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 17509a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 17519a484621SRussell King * PHY driver to determine. 17529a484621SRussell King * 17539a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 17549a484621SRussell King * mode according to the negotiated line speed. 17559a484621SRussell King */ 1756256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1757181f29daSRussell King { 1758256e43cbSRussell King int err = 0; 1759256e43cbSRussell King 1760e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1761e85b1347SMarek Behún case MDIO_I2C_NONE: 17629a484621SRussell King break; 17639a484621SRussell King 1764e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1765324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 17669a484621SRussell King break; 1767e85b1347SMarek Behún 1768e85b1347SMarek Behún case MDIO_I2C_C45: 1769324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1770e85b1347SMarek Behún break; 177109bbedacSMarek Behún 177209bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1773324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 177409bbedacSMarek Behún break; 17759a484621SRussell King } 1776e85b1347SMarek Behún 1777256e43cbSRussell King return err; 177873970055SRussell King } 177973970055SRussell King 1780ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 17813bb35261SJon Nettleton { 1782ed32abb1SRussell King u32 power_mW = 1000; 17835765cee1SRussell King (Oracle) bool supports_a2; 17843bb35261SJon Nettleton 178518cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 178618cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1787ed32abb1SRussell King power_mW = 1500; 1788f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1789f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1790f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1791ed32abb1SRussell King power_mW = 2000; 17923bb35261SJon Nettleton 179302eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 179402eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 179502eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 179602eaf5a7SRussell King (Oracle) return 0; 179702eaf5a7SRussell King (Oracle) } 179802eaf5a7SRussell King (Oracle) 17995765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 18005765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 18015765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 18025765cee1SRussell King (Oracle) 1803ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 18047cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 18055765cee1SRussell King (Oracle) if (!supports_a2) { 18067cfa9c92SRussell King /* The module appears not to implement bus address 18077cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 18087cfa9c92SRussell King * indicated mode. 18097cfa9c92SRussell King */ 18103bb35261SJon Nettleton dev_err(sfp->dev, 18113bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1812ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18133bb35261SJon Nettleton return -EINVAL; 18147cfa9c92SRussell King } else { 18153bb35261SJon Nettleton dev_warn(sfp->dev, 18163bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1817ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18183bb35261SJon Nettleton return 0; 18193bb35261SJon Nettleton } 18207cfa9c92SRussell King } 18217cfa9c92SRussell King 18225765cee1SRussell King (Oracle) if (!supports_a2) { 18235765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 18245765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 18255765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 18265765cee1SRussell King (Oracle) */ 18275765cee1SRussell King (Oracle) return 0; 18285765cee1SRussell King (Oracle) } 18295765cee1SRussell King (Oracle) 18307cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 18317cfa9c92SRussell King * an address change sequence, warn the user that the module may 18327cfa9c92SRussell King * not be functional. 18337cfa9c92SRussell King */ 18345765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 18357cfa9c92SRussell King dev_warn(sfp->dev, 183607f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 18377cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 18387cfa9c92SRussell King return 0; 18397cfa9c92SRussell King } 18403bb35261SJon Nettleton 1841ed32abb1SRussell King sfp->module_power_mW = power_mW; 1842ed32abb1SRussell King 1843ed32abb1SRussell King return 0; 1844ed32abb1SRussell King } 1845ed32abb1SRussell King 1846b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1847ed32abb1SRussell King { 1848ed32abb1SRussell King int err; 1849ed32abb1SRussell King 1850bd1432f6SRussell King (Oracle) err = sfp_modify_u8(sfp, true, SFP_EXT_STATUS, 1851bd1432f6SRussell King (Oracle) SFP_EXT_STATUS_PWRLVL_SELECT, 1852bd1432f6SRussell King (Oracle) enable ? SFP_EXT_STATUS_PWRLVL_SELECT : 0); 1853bd1432f6SRussell King (Oracle) if (err != sizeof(u8)) { 1854bd1432f6SRussell King (Oracle) dev_err(sfp->dev, "failed to %sable high power: %pe\n", 1855bd1432f6SRussell King (Oracle) enable ? "en" : "dis", ERR_PTR(err)); 1856b036a554SRussell King return -EAGAIN; 18573bb35261SJon Nettleton } 18583bb35261SJon Nettleton 1859b036a554SRussell King if (enable) 18603bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1861ed32abb1SRussell King sfp->module_power_mW / 1000, 1862ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 18633bb35261SJon Nettleton 1864b036a554SRussell King return 0; 18653bb35261SJon Nettleton } 18663bb35261SJon Nettleton 1867426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1868426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1869426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1870426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1871426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1872426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1873426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1874426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1875426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1876426c6cbcSPali Rohár * at a time. 18770d035bedSRussell King */ 1878426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 18790d035bedSRussell King { 1880426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 18810d035bedSRussell King 1882426c6cbcSPali Rohár /* Already using byte IO */ 1883426c6cbcSPali Rohár if (block_size == 1) 1884426c6cbcSPali Rohár return false; 1885426c6cbcSPali Rohár 1886426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1887426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1888426c6cbcSPali Rohár return false; 18890d035bedSRussell King } 1890426c6cbcSPali Rohár return true; 18910d035bedSRussell King } 18920d035bedSRussell King 1893b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1894b18432c5SChris Healy { 1895b18432c5SChris Healy u8 check; 1896b18432c5SChris Healy int err; 1897b18432c5SChris Healy 1898b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1899b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1900b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1901b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1902b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1903b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1904b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1905b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1906b18432c5SChris Healy if (err != 3) { 19079ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19089ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 19099ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1910b18432c5SChris Healy return err; 1911b18432c5SChris Healy } 1912b18432c5SChris Healy 1913b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1914b18432c5SChris Healy mdelay(50); 1915b18432c5SChris Healy 1916b18432c5SChris Healy /* Update base structure checksum */ 1917b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1918b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1919b18432c5SChris Healy if (err != 1) { 19209ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19219ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 19229ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1923b18432c5SChris Healy return err; 1924b18432c5SChris Healy } 1925b18432c5SChris Healy } 1926b18432c5SChris Healy return 0; 1927b18432c5SChris Healy } 1928b18432c5SChris Healy 1929e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 193073970055SRussell King { 193173970055SRussell King /* SFP module inserted - read I2C data */ 193273970055SRussell King struct sfp_eeprom_id id; 1933b18432c5SChris Healy bool cotsworks_sfbg; 1934981f1f80SRussell King bool cotsworks; 193573970055SRussell King u8 check; 19363bb35261SJon Nettleton int ret; 193773970055SRussell King 1938813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 19390d035bedSRussell King 19400d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 19413bb35261SJon Nettleton if (ret < 0) { 1942e117be74SRussell King if (report) 19439ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 19449ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 194573970055SRussell King return -EAGAIN; 194673970055SRussell King } 194773970055SRussell King 19480d035bedSRussell King if (ret != sizeof(id.base)) { 19499ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 195073970055SRussell King return -EAGAIN; 195173970055SRussell King } 195273970055SRussell King 1953426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1954426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1955426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1956426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1957426c6cbcSPali Rohár * is really required and we have no other option. 1958426c6cbcSPali Rohár */ 1959426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1960426c6cbcSPali Rohár dev_info(sfp->dev, 1961426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1962426c6cbcSPali Rohár dev_info(sfp->dev, 1963426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1964426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1965426c6cbcSPali Rohár 1966426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1967426c6cbcSPali Rohár if (ret < 0) { 1968426c6cbcSPali Rohár if (report) 19699ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19709ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 19719ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1972426c6cbcSPali Rohár return -EAGAIN; 1973426c6cbcSPali Rohár } 1974426c6cbcSPali Rohár 1975426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 19769ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 19779ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1978426c6cbcSPali Rohár return -EAGAIN; 1979426c6cbcSPali Rohár } 1980426c6cbcSPali Rohár } 1981426c6cbcSPali Rohár 1982981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1983981f1f80SRussell King * do the final programming with the final module part number, 1984981f1f80SRussell King * serial number and date code. 1985981f1f80SRussell King */ 1986981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1987b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1988b18432c5SChris Healy 1989b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1990b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1991b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1992b18432c5SChris Healy */ 1993b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1994b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1995b18432c5SChris Healy if (ret < 0) 1996b18432c5SChris Healy return ret; 1997b18432c5SChris Healy } 1998981f1f80SRussell King 199973970055SRussell King /* Validate the checksum over the base structure */ 200073970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 200173970055SRussell King if (check != id.base.cc_base) { 2002981f1f80SRussell King if (cotsworks) { 2003981f1f80SRussell King dev_warn(sfp->dev, 2004981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 2005981f1f80SRussell King check, id.base.cc_base); 2006981f1f80SRussell King } else { 200773970055SRussell King dev_err(sfp->dev, 2008981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2009981f1f80SRussell King check, id.base.cc_base); 201073970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2011981f1f80SRussell King 16, 1, &id, sizeof(id), true); 201273970055SRussell King return -EINVAL; 201373970055SRussell King } 2014981f1f80SRussell King } 201573970055SRussell King 20160d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 20170d035bedSRussell King if (ret < 0) { 20180d035bedSRussell King if (report) 20199ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 20209ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 20210d035bedSRussell King return -EAGAIN; 20220d035bedSRussell King } 20230d035bedSRussell King 20240d035bedSRussell King if (ret != sizeof(id.ext)) { 20259ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 20260d035bedSRussell King return -EAGAIN; 20270d035bedSRussell King } 20280d035bedSRussell King 202973970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 203073970055SRussell King if (check != id.ext.cc_ext) { 2031981f1f80SRussell King if (cotsworks) { 2032981f1f80SRussell King dev_warn(sfp->dev, 2033981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2034981f1f80SRussell King check, id.ext.cc_ext); 2035981f1f80SRussell King } else { 203673970055SRussell King dev_err(sfp->dev, 2037981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2038981f1f80SRussell King check, id.ext.cc_ext); 2039981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2040981f1f80SRussell King 16, 1, &id, sizeof(id), true); 204173970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 204273970055SRussell King } 2043981f1f80SRussell King } 204473970055SRussell King 204573970055SRussell King sfp->id = id; 204673970055SRussell King 2047a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2048a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2049a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2050a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2051a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2052a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 205373970055SRussell King 2054259c8618SRussell King /* Check whether we support this module */ 2055f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2056259c8618SRussell King dev_err(sfp->dev, 2057259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 205873970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 205973970055SRussell King return -EINVAL; 206073970055SRussell King } 206173970055SRussell King 2062ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 2063ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 2064ec7681bdSRussell King dev_warn(sfp->dev, 2065ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 2066ec7681bdSRussell King 2067ed32abb1SRussell King /* Parse the module power requirement */ 2068ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2069ed32abb1SRussell King if (ret < 0) 2070ed32abb1SRussell King return ret; 2071ed32abb1SRussell King 20728475c4b7SRussell King (Oracle) /* Initialise state bits to use from hardware */ 20738475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 20748475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 20758475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_DISABLE; 20768475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 20778475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_FAULT; 20788475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 20798475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_LOS; 20808475c4b7SRussell King (Oracle) 208126c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2082324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 208326c97a2dSRussell King 20842069624dSMatthew Hagan sfp->tx_fault_ignore = false; 20852069624dSMatthew Hagan 2086e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2087e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2088e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2089e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2090e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2091e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2092e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2093e85b1347SMarek Behún else 2094e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2095e85b1347SMarek Behún 209623571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 209727541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 209827541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 209923571c7bSRussell King (Oracle) 2100b036a554SRussell King return 0; 210173970055SRussell King } 210273970055SRussell King 210373970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 210473970055SRussell King { 210573f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 210673970055SRussell King sfp_module_remove(sfp->sfp_bus); 210773970055SRussell King 21081323061aSAndrew Lunn sfp_hwmon_remove(sfp); 21091323061aSAndrew Lunn 211073970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2111ed32abb1SRussell King sfp->module_power_mW = 0; 211273970055SRussell King 211373970055SRussell King dev_info(sfp->dev, "module removed\n"); 211473970055SRussell King } 211573970055SRussell King 21166b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2117e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 211873970055SRussell King { 2119e85d81a1SRussell King switch (sfp->sm_dev_state) { 2120e85d81a1SRussell King default: 21216b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 21226b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 21236b0da5c9SRussell King break; 21246b0da5c9SRussell King 21256b0da5c9SRussell King case SFP_DEV_DOWN: 21266b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21276b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21286b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2129e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2130e85d81a1SRussell King break; 213173970055SRussell King 2132e85d81a1SRussell King case SFP_DEV_UP: 21336b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21346b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21356b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2136e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2137e85d81a1SRussell King break; 2138e85d81a1SRussell King } 2139e85d81a1SRussell King } 214073970055SRussell King 2141d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2142d900954fSRussell King * the on-board EEPROM, and sets up the power level. 214373970055SRussell King */ 2144e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2145e85d81a1SRussell King { 2146b036a554SRussell King int err; 2147b036a554SRussell King 2148b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2149b036a554SRussell King if (event == SFP_E_REMOVE) { 2150d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2151d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2152b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2153b036a554SRussell King return; 2154b036a554SRussell King } 2155b036a554SRussell King 2156b036a554SRussell King /* Handle device detach globally */ 215773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 215873f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2159b036a554SRussell King if (sfp->module_power_mW > 1000 && 2160b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2161b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 216273f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2163d2e816c0SRussell King return; 2164d2e816c0SRussell King } 2165d2e816c0SRussell King 216673970055SRussell King switch (sfp->sm_mod_state) { 216773970055SRussell King default: 2168e117be74SRussell King if (event == SFP_E_INSERT) { 2169d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2170e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2171e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2172e117be74SRussell King } 217373970055SRussell King break; 217473970055SRussell King 217573970055SRussell King case SFP_MOD_PROBE: 217673f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2177b036a554SRussell King if (event != SFP_E_TIMEOUT) 2178b036a554SRussell King break; 217973970055SRussell King 2180e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2181b036a554SRussell King if (err == -EAGAIN) { 2182e117be74SRussell King if (sfp->sm_mod_tries_init && 2183e117be74SRussell King --sfp->sm_mod_tries_init) { 2184e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2185b036a554SRussell King break; 2186e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2187e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2188e117be74SRussell King dev_warn(sfp->dev, 2189e117be74SRussell King "please wait, module slow to respond\n"); 2190e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2191e117be74SRussell King break; 2192e117be74SRussell King } 2193b036a554SRussell King } 2194b036a554SRussell King if (err < 0) { 2195b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2196b036a554SRussell King break; 2197b036a554SRussell King } 2198b036a554SRussell King 219904361b8bSRussell King (Oracle) /* Force a poll to re-read the hardware signal state after 220004361b8bSRussell King (Oracle) * sfp_sm_mod_probe() changed state_hw_mask. 220104361b8bSRussell King (Oracle) */ 220204361b8bSRussell King (Oracle) mod_delayed_work(system_wq, &sfp->poll, 1); 220304361b8bSRussell King (Oracle) 220438ecd706SRussell King err = sfp_hwmon_insert(sfp); 220538ecd706SRussell King if (err) 22069ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 22079ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 220838ecd706SRussell King 220973f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2210df561f66SGustavo A. R. Silva fallthrough; 221173f5e847SRussell King case SFP_MOD_WAITDEV: 221273f5e847SRussell King /* Ensure that the device is attached before proceeding */ 221373f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 221473f5e847SRussell King break; 221573f5e847SRussell King 221673f5e847SRussell King /* Report the module insertion to the upstream device */ 221723571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 221823571c7bSRussell King (Oracle) sfp->quirk); 221973f5e847SRussell King if (err < 0) { 222073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 222173f5e847SRussell King break; 222273f5e847SRussell King } 222373f5e847SRussell King 2224b036a554SRussell King /* If this is a power level 1 module, we are done */ 2225b036a554SRussell King if (sfp->module_power_mW <= 1000) 2226b036a554SRussell King goto insert; 2227b036a554SRussell King 2228b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2229df561f66SGustavo A. R. Silva fallthrough; 2230b036a554SRussell King case SFP_MOD_HPOWER: 2231b036a554SRussell King /* Enable high power mode */ 2232b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 223373f5e847SRussell King if (err < 0) { 223473f5e847SRussell King if (err != -EAGAIN) { 223573f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 22360936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 223773f5e847SRussell King } else { 2238e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 223973f5e847SRussell King } 224073f5e847SRussell King break; 224173f5e847SRussell King } 224273f5e847SRussell King 224373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 224473970055SRussell King break; 224573970055SRussell King 2246b036a554SRussell King case SFP_MOD_WAITPWR: 2247b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2248b036a554SRussell King if (event != SFP_E_TIMEOUT) 2249b036a554SRussell King break; 2250b036a554SRussell King 2251b036a554SRussell King insert: 22520936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 22533bb35261SJon Nettleton break; 2254b036a554SRussell King 225573970055SRussell King case SFP_MOD_PRESENT: 225673970055SRussell King case SFP_MOD_ERROR: 225773970055SRussell King break; 225873970055SRussell King } 225973970055SRussell King } 226073970055SRussell King 2261e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2262e85d81a1SRussell King { 2263eefa6f1fSRussell King unsigned long timeout; 22641cb89a14SRussell King int ret; 2265eefa6f1fSRussell King 226673970055SRussell King /* Some events are global */ 226773970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 226873970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 226973970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 227073970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 227173970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 227273970055SRussell King sfp_sm_link_down(sfp); 227374c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 227474c551caSRussell King sfp_module_stop(sfp->sfp_bus); 227573970055SRussell King if (sfp->mod_phy) 227673970055SRussell King sfp_sm_phy_detach(sfp); 2277e85b1347SMarek Behún if (sfp->i2c_mii) 2278e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 22791539e0d3SRussell King sfp_module_tx_disable(sfp); 2280f3c9a666SRussell King sfp_soft_stop_poll(sfp); 228173970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 228273970055SRussell King return; 228373970055SRussell King } 228473970055SRussell King 228573970055SRussell King /* The main state machine */ 228673970055SRussell King switch (sfp->sm_state) { 228773970055SRussell King case SFP_S_DOWN: 2288eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2289eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2290eefa6f1fSRussell King break; 2291eefa6f1fSRussell King 2292f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2293f3c9a666SRussell King sfp_soft_start_poll(sfp); 2294f3c9a666SRussell King 2295f3c9a666SRussell King sfp_module_tx_enable(sfp); 2296eefa6f1fSRussell King 2297eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2298281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2299eefa6f1fSRussell King 2300eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2301eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2302324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2303324e88cbSMarek Behún * specific modules). 2304eefa6f1fSRussell King */ 2305324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2306eefa6f1fSRussell King break; 2307eefa6f1fSRussell King 2308eefa6f1fSRussell King case SFP_S_WAIT: 2309eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2310eefa6f1fSRussell King break; 2311eefa6f1fSRussell King 2312eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 231326c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 231426c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 231526c97a2dSRussell King * initialise, which is indicated by TX_FAULT 231626c97a2dSRussell King * deasserting. 2317181f29daSRussell King */ 231826c97a2dSRussell King timeout = sfp->module_t_start_up; 2319324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2320324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2321eefa6f1fSRussell King else 2322eefa6f1fSRussell King timeout = 1; 2323eefa6f1fSRussell King 2324eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2325eefa6f1fSRussell King } else { 2326eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2327eefa6f1fSRussell King * finished initialising. 2328eefa6f1fSRussell King */ 2329eefa6f1fSRussell King goto init_done; 2330181f29daSRussell King } 233173970055SRussell King break; 233273970055SRussell King 233373970055SRussell King case SFP_S_INIT: 2334d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2335e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 233626c97a2dSRussell King * or t_start_up, so assume there is a fault. 2337d23751a0SRussell King */ 2338d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2339281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2340d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 23411cb89a14SRussell King init_done: 2342e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2343e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2344e85b1347SMarek Behún if (ret < 0) { 2345e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2346e85b1347SMarek Behún break; 2347e85b1347SMarek Behún } 23481cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 23491cb89a14SRussell King goto phy_probe; 23501cb89a14SRussell King } 23511cb89a14SRussell King break; 23521cb89a14SRussell King 23531cb89a14SRussell King case SFP_S_INIT_PHY: 23541cb89a14SRussell King if (event != SFP_E_TIMEOUT) 23551cb89a14SRussell King break; 23561cb89a14SRussell King phy_probe: 23571cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2358d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2359d23751a0SRussell King */ 23601cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 23611cb89a14SRussell King if (ret == -ENODEV) { 23621cb89a14SRussell King if (--sfp->sm_phy_retries) { 23631cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 23641cb89a14SRussell King break; 23651cb89a14SRussell King } else { 23661cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 23671cb89a14SRussell King } 23681cb89a14SRussell King } else if (ret) { 2369256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2370256e43cbSRussell King break; 2371256e43cbSRussell King } 237274c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 237374c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 237474c551caSRussell King break; 237574c551caSRussell King } 2376d23751a0SRussell King sfp_sm_link_check_los(sfp); 2377d23751a0SRussell King 2378d23751a0SRussell King /* Reset the fault retry count */ 2379281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2380d23751a0SRussell King break; 2381d23751a0SRussell King 2382d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2383d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2384d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 238526c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2386d23751a0SRussell King } 238773970055SRussell King break; 238873970055SRussell King 238973970055SRussell King case SFP_S_WAIT_LOS: 239073970055SRussell King if (event == SFP_E_TX_FAULT) 239163ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2392710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 239373970055SRussell King sfp_sm_link_up(sfp); 239473970055SRussell King break; 239573970055SRussell King 239673970055SRussell King case SFP_S_LINK_UP: 239773970055SRussell King if (event == SFP_E_TX_FAULT) { 239873970055SRussell King sfp_sm_link_down(sfp); 239963ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2400710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 240173970055SRussell King sfp_sm_link_down(sfp); 240273970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 240373970055SRussell King } 240473970055SRussell King break; 240573970055SRussell King 240673970055SRussell King case SFP_S_TX_FAULT: 240773970055SRussell King if (event == SFP_E_TIMEOUT) { 240873970055SRussell King sfp_module_tx_fault_reset(sfp); 240926c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 241073970055SRussell King } 241173970055SRussell King break; 241273970055SRussell King 241373970055SRussell King case SFP_S_REINIT: 241473970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 241563ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 241673970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 241773970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 241873970055SRussell King sfp_sm_link_check_los(sfp); 241973970055SRussell King } 242073970055SRussell King break; 242173970055SRussell King 242273970055SRussell King case SFP_S_TX_DISABLE: 242373970055SRussell King break; 242473970055SRussell King } 2425e85d81a1SRussell King } 2426e85d81a1SRussell King 2427e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2428e85d81a1SRussell King { 2429e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2430e85d81a1SRussell King 2431e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2432e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2433e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2434e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2435e85d81a1SRussell King event_to_str(event)); 2436e85d81a1SRussell King 2437e85d81a1SRussell King sfp_sm_device(sfp, event); 24386b0da5c9SRussell King sfp_sm_module(sfp, event); 2439e85d81a1SRussell King sfp_sm_main(sfp, event); 244073970055SRussell King 24414005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 24424005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 24434005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 24444005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 244573970055SRussell King 244673970055SRussell King mutex_unlock(&sfp->sm_mutex); 244773970055SRussell King } 244873970055SRussell King 2449b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2450b5bfc21aSRussell King { 24516b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2452b5bfc21aSRussell King } 2453b5bfc21aSRussell King 2454b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2455b5bfc21aSRussell King { 24566b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2457b5bfc21aSRussell King } 2458b5bfc21aSRussell King 245973970055SRussell King static void sfp_start(struct sfp *sfp) 246073970055SRussell King { 246173970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 246273970055SRussell King } 246373970055SRussell King 246473970055SRussell King static void sfp_stop(struct sfp *sfp) 246573970055SRussell King { 246673970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 246773970055SRussell King } 246873970055SRussell King 246973970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 247073970055SRussell King { 247173970055SRussell King /* locking... and check module is present */ 247273970055SRussell King 2473ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2474ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 247573970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 247673970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 247773970055SRussell King } else { 247873970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 247973970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 248073970055SRussell King } 248173970055SRussell King return 0; 248273970055SRussell King } 248373970055SRussell King 248473970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 248573970055SRussell King u8 *data) 248673970055SRussell King { 248773970055SRussell King unsigned int first, last, len; 248873970055SRussell King int ret; 248973970055SRussell King 2490*bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2491*bef227c1SIvan Bornyakov return -ENODEV; 2492*bef227c1SIvan Bornyakov 249373970055SRussell King if (ee->len == 0) 249473970055SRussell King return -EINVAL; 249573970055SRussell King 249673970055SRussell King first = ee->offset; 249773970055SRussell King last = ee->offset + ee->len; 249873970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 249973970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 250073970055SRussell King len -= first; 250173970055SRussell King 25022794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 250373970055SRussell King if (ret < 0) 250473970055SRussell King return ret; 250573970055SRussell King 250673970055SRussell King first += len; 250773970055SRussell King data += len; 250873970055SRussell King } 25092794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 251073970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 251173970055SRussell King len -= first; 251273970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 251373970055SRussell King 25142794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 251573970055SRussell King if (ret < 0) 251673970055SRussell King return ret; 251773970055SRussell King } 251873970055SRussell King return 0; 251973970055SRussell King } 252073970055SRussell King 2521d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2522d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2523d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2524d740513fSAndrew Lunn { 2525*bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2526*bef227c1SIvan Bornyakov return -ENODEV; 2527*bef227c1SIvan Bornyakov 2528d740513fSAndrew Lunn if (page->bank) { 2529d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2530d740513fSAndrew Lunn return -EOPNOTSUPP; 2531d740513fSAndrew Lunn } 2532d740513fSAndrew Lunn 2533d740513fSAndrew Lunn if (page->page) { 2534d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2535d740513fSAndrew Lunn return -EOPNOTSUPP; 2536d740513fSAndrew Lunn } 2537d740513fSAndrew Lunn 2538d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2539d740513fSAndrew Lunn page->i2c_address != 0x51) { 2540d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2541d740513fSAndrew Lunn return -EOPNOTSUPP; 2542d740513fSAndrew Lunn } 2543d740513fSAndrew Lunn 2544d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2545d740513fSAndrew Lunn page->data, page->length); 2546d740513fSAndrew Lunn }; 2547d740513fSAndrew Lunn 254873970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2549b5bfc21aSRussell King .attach = sfp_attach, 2550b5bfc21aSRussell King .detach = sfp_detach, 255173970055SRussell King .start = sfp_start, 255273970055SRussell King .stop = sfp_stop, 255373970055SRussell King .module_info = sfp_module_info, 255473970055SRussell King .module_eeprom = sfp_module_eeprom, 2555d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 255673970055SRussell King }; 255773970055SRussell King 255873970055SRussell King static void sfp_timeout(struct work_struct *work) 255973970055SRussell King { 256073970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 256173970055SRussell King 256273970055SRussell King rtnl_lock(); 256373970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 256473970055SRussell King rtnl_unlock(); 256573970055SRussell King } 256673970055SRussell King 256773970055SRussell King static void sfp_check_state(struct sfp *sfp) 256873970055SRussell King { 256973970055SRussell King unsigned int state, i, changed; 257073970055SRussell King 25712158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 257273970055SRussell King state = sfp_get_state(sfp); 257373970055SRussell King changed = state ^ sfp->state; 25742069624dSMatthew Hagan if (sfp->tx_fault_ignore) 25752069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 25762069624dSMatthew Hagan else 257773970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 257873970055SRussell King 257973970055SRussell King for (i = 0; i < GPIO_MAX; i++) 258073970055SRussell King if (changed & BIT(i)) 2581f35cb547SRussell King (Oracle) dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_names[i], 258273970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 258373970055SRussell King 258473970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 258573970055SRussell King sfp->state = state; 258673970055SRussell King 258773970055SRussell King rtnl_lock(); 258873970055SRussell King if (changed & SFP_F_PRESENT) 258973970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 259073970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 259173970055SRussell King 259273970055SRussell King if (changed & SFP_F_TX_FAULT) 259373970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 259473970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 259573970055SRussell King 259673970055SRussell King if (changed & SFP_F_LOS) 259773970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 259873970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 259973970055SRussell King rtnl_unlock(); 26002158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 260173970055SRussell King } 260273970055SRussell King 260373970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 260473970055SRussell King { 260573970055SRussell King struct sfp *sfp = data; 260673970055SRussell King 260773970055SRussell King sfp_check_state(sfp); 260873970055SRussell King 260973970055SRussell King return IRQ_HANDLED; 261073970055SRussell King } 261173970055SRussell King 261273970055SRussell King static void sfp_poll(struct work_struct *work) 261373970055SRussell King { 261473970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 261573970055SRussell King 261673970055SRussell King sfp_check_state(sfp); 2617f3c9a666SRussell King 2618f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2619f3c9a666SRussell King sfp->need_poll) 262073970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 262173970055SRussell King } 262273970055SRussell King 262373970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 262473970055SRussell King { 262573970055SRussell King struct sfp *sfp; 262673970055SRussell King 262773970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 262873970055SRussell King if (!sfp) 262973970055SRussell King return ERR_PTR(-ENOMEM); 263073970055SRussell King 263173970055SRussell King sfp->dev = dev; 2632813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 263373970055SRussell King 263473970055SRussell King mutex_init(&sfp->sm_mutex); 26352158e856SRobert Hancock mutex_init(&sfp->st_mutex); 263673970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 263773970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 263873970055SRussell King 2639139d3a21SRussell King sfp_hwmon_init(sfp); 2640139d3a21SRussell King 264173970055SRussell King return sfp; 264273970055SRussell King } 264373970055SRussell King 264473970055SRussell King static void sfp_cleanup(void *data) 264573970055SRussell King { 264673970055SRussell King struct sfp *sfp = data; 264773970055SRussell King 2648139d3a21SRussell King sfp_hwmon_exit(sfp); 2649139d3a21SRussell King 265073970055SRussell King cancel_delayed_work_sync(&sfp->poll); 265173970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 265273970055SRussell King if (sfp->i2c_mii) { 265373970055SRussell King mdiobus_unregister(sfp->i2c_mii); 265473970055SRussell King mdiobus_free(sfp->i2c_mii); 265573970055SRussell King } 265673970055SRussell King if (sfp->i2c) 265773970055SRussell King i2c_put_adapter(sfp->i2c); 265873970055SRussell King kfree(sfp); 265973970055SRussell King } 266073970055SRussell King 266115309fb2SRussell King (Oracle) static int sfp_i2c_get(struct sfp *sfp) 266215309fb2SRussell King (Oracle) { 266315309fb2SRussell King (Oracle) struct fwnode_handle *h; 266415309fb2SRussell King (Oracle) struct i2c_adapter *i2c; 266515309fb2SRussell King (Oracle) int err; 266615309fb2SRussell King (Oracle) 266715309fb2SRussell King (Oracle) h = fwnode_find_reference(dev_fwnode(sfp->dev), "i2c-bus", 0); 266815309fb2SRussell King (Oracle) if (IS_ERR(h)) { 266915309fb2SRussell King (Oracle) dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 267015309fb2SRussell King (Oracle) return -ENODEV; 267115309fb2SRussell King (Oracle) } 267215309fb2SRussell King (Oracle) 2673ff31a0c4SRussell King (Oracle) i2c = i2c_get_adapter_by_fwnode(h); 267415309fb2SRussell King (Oracle) if (!i2c) { 267515309fb2SRussell King (Oracle) err = -EPROBE_DEFER; 267615309fb2SRussell King (Oracle) goto put; 267715309fb2SRussell King (Oracle) } 267815309fb2SRussell King (Oracle) 267915309fb2SRussell King (Oracle) err = sfp_i2c_configure(sfp, i2c); 268015309fb2SRussell King (Oracle) if (err) 268115309fb2SRussell King (Oracle) i2c_put_adapter(i2c); 268215309fb2SRussell King (Oracle) put: 268315309fb2SRussell King (Oracle) fwnode_handle_put(h); 268415309fb2SRussell King (Oracle) return err; 268515309fb2SRussell King (Oracle) } 268615309fb2SRussell King (Oracle) 268773970055SRussell King static int sfp_probe(struct platform_device *pdev) 268873970055SRussell King { 2689259c8618SRussell King const struct sff_data *sff; 26905411ca71SChris Healy char *sfp_irq_name; 269173970055SRussell King struct sfp *sfp; 2692257c2559SRobert Hancock int err, i; 269373970055SRussell King 269473970055SRussell King sfp = sfp_alloc(&pdev->dev); 269573970055SRussell King if (IS_ERR(sfp)) 269673970055SRussell King return PTR_ERR(sfp); 269773970055SRussell King 269873970055SRussell King platform_set_drvdata(pdev, sfp); 269973970055SRussell King 27000a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 270173970055SRussell King if (err < 0) 270273970055SRussell King return err; 270373970055SRussell King 2704b71dda81SRussell King (Oracle) sff = device_get_match_data(sfp->dev); 2705b71dda81SRussell King (Oracle) if (!sff) 2706b71dda81SRussell King (Oracle) sff = &sfp_data; 2707259c8618SRussell King 2708b71dda81SRussell King (Oracle) sfp->type = sff; 27097ce236faSRuslan Babayev 271015309fb2SRussell King (Oracle) err = sfp_i2c_get(sfp); 271115309fb2SRussell King (Oracle) if (err) 271273970055SRussell King return err; 271373970055SRussell King 2714259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2715259c8618SRussell King if (sff->gpios & BIT(i)) { 271673970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 2717f35cb547SRussell King (Oracle) gpio_names[i], gpio_flags[i]); 271873970055SRussell King if (IS_ERR(sfp->gpio[i])) 271973970055SRussell King return PTR_ERR(sfp->gpio[i]); 272073970055SRussell King } 272173970055SRussell King 27228475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 27238475c4b7SRussell King (Oracle) 272473970055SRussell King sfp->get_state = sfp_gpio_get_state; 272573970055SRussell King sfp->set_state = sfp_gpio_set_state; 2726259c8618SRussell King 2727259c8618SRussell King /* Modules that have no detect signal are always present */ 2728259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2729259c8618SRussell King sfp->get_state = sff_gpio_get_state; 273073970055SRussell King 27313bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 27323bb35261SJon Nettleton &sfp->max_power_mW); 273302eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 273402eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 273502eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 273602eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 27373bb35261SJon Nettleton sfp->max_power_mW = 1000; 273802eaf5a7SRussell King (Oracle) } 27393bb35261SJon Nettleton 27403bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 27413bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 27423bb35261SJon Nettleton 274373970055SRussell King /* Get the initial state, and always signal TX disable, 274473970055SRussell King * since the network interface will not be up. 274573970055SRussell King */ 274673970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 274773970055SRussell King 274873970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 274973970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 275073970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 275173970055SRussell King sfp_set_state(sfp, sfp->state); 275273970055SRussell King sfp_module_tx_disable(sfp); 275373f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 275473f5e847SRussell King rtnl_lock(); 275573f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 275673f5e847SRussell King rtnl_unlock(); 275773f5e847SRussell King } 275873970055SRussell King 275973970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 276073970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 276173970055SRussell King continue; 276273970055SRussell King 2763257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 276496216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 276596216181SYueHaibing sfp->gpio_irq[i] = 0; 2766f3c9a666SRussell King sfp->need_poll = true; 276773970055SRussell King continue; 276873970055SRussell King } 276973970055SRussell King 27705411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 27715411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 2772f35cb547SRussell King (Oracle) gpio_names[i]); 27735411ca71SChris Healy 27748cb601f1SChris Healy if (!sfp_irq_name) 27758cb601f1SChris Healy return -ENOMEM; 27768cb601f1SChris Healy 2777257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2778257c2559SRobert Hancock NULL, sfp_irq, 277973970055SRussell King IRQF_ONESHOT | 278073970055SRussell King IRQF_TRIGGER_RISING | 278173970055SRussell King IRQF_TRIGGER_FALLING, 27825411ca71SChris Healy sfp_irq_name, sfp); 2783257c2559SRobert Hancock if (err) { 2784257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2785f3c9a666SRussell King sfp->need_poll = true; 278673970055SRussell King } 2787257c2559SRobert Hancock } 278873970055SRussell King 2789f3c9a666SRussell King if (sfp->need_poll) 279073970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 279173970055SRussell King 2792a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2793a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2794a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2795a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2796a1f5d1f0SAntoine Tenart */ 2797a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2798a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2799a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2800a1f5d1f0SAntoine Tenart 2801b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2802b5bfc21aSRussell King if (!sfp->sfp_bus) 2803b5bfc21aSRussell King return -ENOMEM; 2804b5bfc21aSRussell King 28059cc8976cSRussell King sfp_debugfs_init(sfp); 28069cc8976cSRussell King 280773970055SRussell King return 0; 280873970055SRussell King } 280973970055SRussell King 281073970055SRussell King static int sfp_remove(struct platform_device *pdev) 281173970055SRussell King { 281273970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 281373970055SRussell King 28149cc8976cSRussell King sfp_debugfs_exit(sfp); 281573970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 281673970055SRussell King 28170cb96b57SRussell King rtnl_lock(); 28180cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 28190cb96b57SRussell King rtnl_unlock(); 28200cb96b57SRussell King 282173970055SRussell King return 0; 282273970055SRussell King } 282373970055SRussell King 2824257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2825257c2559SRobert Hancock { 2826257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2827257c2559SRobert Hancock int i; 2828257c2559SRobert Hancock 2829257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2830257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2831257c2559SRobert Hancock continue; 2832257c2559SRobert Hancock 2833257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2834257c2559SRobert Hancock } 2835257c2559SRobert Hancock 2836257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2837257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2838257c2559SRobert Hancock } 2839257c2559SRobert Hancock 284073970055SRussell King static struct platform_driver sfp_driver = { 284173970055SRussell King .probe = sfp_probe, 284273970055SRussell King .remove = sfp_remove, 2843257c2559SRobert Hancock .shutdown = sfp_shutdown, 284473970055SRussell King .driver = { 284573970055SRussell King .name = "sfp", 284673970055SRussell King .of_match_table = sfp_of_match, 284773970055SRussell King }, 284873970055SRussell King }; 284973970055SRussell King 285073970055SRussell King static int sfp_init(void) 285173970055SRussell King { 285273970055SRussell King poll_jiffies = msecs_to_jiffies(100); 285373970055SRussell King 285473970055SRussell King return platform_driver_register(&sfp_driver); 285573970055SRussell King } 285673970055SRussell King module_init(sfp_init); 285773970055SRussell King 285873970055SRussell King static void sfp_exit(void) 285973970055SRussell King { 286073970055SRussell King platform_driver_unregister(&sfp_driver); 286173970055SRussell King } 286273970055SRussell King module_exit(sfp_exit); 286373970055SRussell King 286473970055SRussell King MODULE_ALIAS("platform:sfp"); 286573970055SRussell King MODULE_AUTHOR("Russell King"); 286673970055SRussell King MODULE_LICENSE("GPL v2"); 2867