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; 264f94b9bedSRussell King (Oracle) 265f94b9bedSRussell King (Oracle) bool have_a2; 2662069624dSMatthew Hagan bool tx_fault_ignore; 267ed32abb1SRussell King 26823571c7bSRussell King (Oracle) const struct sfp_quirk *quirk; 26923571c7bSRussell King (Oracle) 2701323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2711323061aSAndrew Lunn struct sfp_diag diag; 272139d3a21SRussell King struct delayed_work hwmon_probe; 273139d3a21SRussell King unsigned int hwmon_tries; 2741323061aSAndrew Lunn struct device *hwmon_dev; 2751323061aSAndrew Lunn char *hwmon_name; 2761323061aSAndrew Lunn #endif 2771323061aSAndrew Lunn 2789cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2799cc8976cSRussell King struct dentry *debugfs_dir; 2809cc8976cSRussell King #endif 28173970055SRussell King }; 28273970055SRussell King 283259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 284259c8618SRussell King { 2850fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 286259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 287259c8618SRussell King } 288259c8618SRussell King 289259c8618SRussell King static const struct sff_data sff_data = { 290259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 291259c8618SRussell King .module_supported = sff_module_supported, 292259c8618SRussell King }; 293259c8618SRussell King 294259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 295259c8618SRussell King { 296f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 297f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 298f0b4f847SPali Rohár return true; 299f0b4f847SPali Rohár 300f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 301f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 302f0b4f847SPali Rohár * as supported based on vendor name and pn match. 303f0b4f847SPali Rohár */ 304f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 305f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 306f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 307f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 308f0b4f847SPali Rohár return true; 309f0b4f847SPali Rohár 310f0b4f847SPali Rohár return false; 311259c8618SRussell King } 312259c8618SRussell King 313259c8618SRussell King static const struct sff_data sfp_data = { 314259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 315259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 316259c8618SRussell King .module_supported = sfp_module_supported, 317259c8618SRussell King }; 318259c8618SRussell King 319259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 320259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 321259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 322259c8618SRussell King { }, 323259c8618SRussell King }; 324259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 325259c8618SRussell King 32627541675SRussell King (Oracle) static void sfp_fixup_long_startup(struct sfp *sfp) 32727541675SRussell King (Oracle) { 32827541675SRussell King (Oracle) sfp->module_t_start_up = T_START_UP_BAD_GPON; 32927541675SRussell King (Oracle) } 33027541675SRussell King (Oracle) 3315029be76SRussell King (Oracle) static void sfp_fixup_ignore_tx_fault(struct sfp *sfp) 3325029be76SRussell King (Oracle) { 3335029be76SRussell King (Oracle) sfp->tx_fault_ignore = true; 3345029be76SRussell King (Oracle) } 3355029be76SRussell King (Oracle) 33673472c83SRussell King (Oracle) static void sfp_fixup_halny_gsfp(struct sfp *sfp) 33773472c83SRussell King (Oracle) { 33873472c83SRussell King (Oracle) /* Ignore the TX_FAULT and LOS signals on this module. 33973472c83SRussell King (Oracle) * these are possibly used for other purposes on this 34073472c83SRussell King (Oracle) * module, e.g. a serial port. 34173472c83SRussell King (Oracle) */ 34273472c83SRussell King (Oracle) sfp->state_hw_mask &= ~(SFP_F_TX_FAULT | SFP_F_LOS); 34373472c83SRussell King (Oracle) } 34473472c83SRussell King (Oracle) 345324e88cbSMarek Behún static void sfp_fixup_rollball(struct sfp *sfp) 346324e88cbSMarek Behún { 347324e88cbSMarek Behún sfp->mdio_protocol = MDIO_I2C_ROLLBALL; 348324e88cbSMarek Behún sfp->module_t_wait = T_WAIT_ROLLBALL; 349324e88cbSMarek Behún } 350324e88cbSMarek Behún 351324e88cbSMarek Behún static void sfp_fixup_rollball_cc(struct sfp *sfp) 352324e88cbSMarek Behún { 353324e88cbSMarek Behún sfp_fixup_rollball(sfp); 354324e88cbSMarek Behún 355324e88cbSMarek Behún /* Some RollBall SFPs may have wrong (zero) extended compliance code 356324e88cbSMarek Behún * burned in EEPROM. For PHY probing we need the correct one. 357324e88cbSMarek Behún */ 358324e88cbSMarek Behún sfp->id.base.extended_cc = SFF8024_ECC_10GBASE_T_SFI; 359324e88cbSMarek Behún } 360324e88cbSMarek Behún 36123571c7bSRussell King (Oracle) static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id, 362fd580c98SRussell King unsigned long *modes, 363fd580c98SRussell King unsigned long *interfaces) 36423571c7bSRussell King (Oracle) { 36523571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, modes); 366fd580c98SRussell King __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 36723571c7bSRussell King (Oracle) } 36823571c7bSRussell King (Oracle) 36950e96acbSRussell King (Oracle) static void sfp_quirk_disable_autoneg(const struct sfp_eeprom_id *id, 37050e96acbSRussell King (Oracle) unsigned long *modes, 37150e96acbSRussell King (Oracle) unsigned long *interfaces) 37250e96acbSRussell King (Oracle) { 37350e96acbSRussell King (Oracle) linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, modes); 37450e96acbSRussell King (Oracle) } 37550e96acbSRussell King (Oracle) 37650e96acbSRussell King (Oracle) static void sfp_quirk_oem_2_5g(const struct sfp_eeprom_id *id, 37750e96acbSRussell King (Oracle) unsigned long *modes, 37850e96acbSRussell King (Oracle) unsigned long *interfaces) 37950e96acbSRussell King (Oracle) { 38050e96acbSRussell King (Oracle) /* Copper 2.5G SFP */ 38150e96acbSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, modes); 38250e96acbSRussell King (Oracle) __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 38350e96acbSRussell King (Oracle) sfp_quirk_disable_autoneg(id, modes, interfaces); 38450e96acbSRussell King (Oracle) } 38550e96acbSRussell King (Oracle) 38623571c7bSRussell King (Oracle) static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id, 387fd580c98SRussell King unsigned long *modes, 388fd580c98SRussell King unsigned long *interfaces) 38923571c7bSRussell King (Oracle) { 39023571c7bSRussell King (Oracle) /* Ubiquiti U-Fiber Instant module claims that support all transceiver 39123571c7bSRussell King (Oracle) * types including 10G Ethernet which is not truth. So clear all claimed 39223571c7bSRussell King (Oracle) * modes and set only one mode which module supports: 1000baseX_Full. 39323571c7bSRussell King (Oracle) */ 39423571c7bSRussell King (Oracle) linkmode_zero(modes); 39523571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, modes); 39623571c7bSRussell King (Oracle) } 39723571c7bSRussell King (Oracle) 39813c8adcfSMarek Behún #define SFP_QUIRK(_v, _p, _m, _f) \ 39913c8adcfSMarek Behún { .vendor = _v, .part = _p, .modes = _m, .fixup = _f, } 40013c8adcfSMarek Behún #define SFP_QUIRK_M(_v, _p, _m) SFP_QUIRK(_v, _p, _m, NULL) 40113c8adcfSMarek Behún #define SFP_QUIRK_F(_v, _p, _f) SFP_QUIRK(_v, _p, NULL, _f) 40213c8adcfSMarek Behún 40323571c7bSRussell King (Oracle) static const struct sfp_quirk sfp_quirks[] = { 40413c8adcfSMarek Behún // Alcatel Lucent G-010S-P can operate at 2500base-X, but incorrectly 40513c8adcfSMarek Behún // report 2500MBd NRZ in their EEPROM 40613c8adcfSMarek Behún SFP_QUIRK_M("ALCATELLUCENT", "G010SP", sfp_quirk_2500basex), 40713c8adcfSMarek Behún 40813c8adcfSMarek Behún // Alcatel Lucent G-010S-A can operate at 2500base-X, but report 3.2GBd 40923571c7bSRussell King (Oracle) // NRZ in their EEPROM 41013c8adcfSMarek Behún SFP_QUIRK("ALCATELLUCENT", "3FE46541AA", sfp_quirk_2500basex, 41113c8adcfSMarek Behún sfp_fixup_long_startup), 41213c8adcfSMarek Behún 41313c8adcfSMarek Behún SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp), 41413c8adcfSMarek Behún 415ad651d68SDaniel Golle // HG MXPD-483II-F 2.5G supports 2500Base-X, but incorrectly reports 416ad651d68SDaniel Golle // 2600MBd in their EERPOM 417ad651d68SDaniel Golle SFP_QUIRK_M("HG GENUINE", "MXPD-483II", sfp_quirk_2500basex), 418ad651d68SDaniel Golle 41913c8adcfSMarek Behún // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in 42013c8adcfSMarek Behún // their EEPROM 42113c8adcfSMarek Behún SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex, 42213c8adcfSMarek Behún sfp_fixup_ignore_tx_fault), 42313c8adcfSMarek Behún 42413c8adcfSMarek Behún // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report 42513c8adcfSMarek Behún // 2500MBd NRZ in their EEPROM 42613c8adcfSMarek Behún SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex), 42713c8adcfSMarek Behún 42813c8adcfSMarek Behún SFP_QUIRK_M("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant), 429324e88cbSMarek Behún 430324e88cbSMarek Behún SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc), 43150e96acbSRussell King (Oracle) SFP_QUIRK_M("OEM", "SFP-2.5G-T", sfp_quirk_oem_2_5g), 432324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc), 433324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc), 434324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), 435324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), 43623571c7bSRussell King (Oracle) }; 43723571c7bSRussell King (Oracle) 43823571c7bSRussell King (Oracle) static size_t sfp_strlen(const char *str, size_t maxlen) 43923571c7bSRussell King (Oracle) { 44023571c7bSRussell King (Oracle) size_t size, i; 44123571c7bSRussell King (Oracle) 44273472c83SRussell King (Oracle) /* Trailing characters should be filled with space chars, but 44373472c83SRussell King (Oracle) * some manufacturers can't read SFF-8472 and use NUL. 44473472c83SRussell King (Oracle) */ 44523571c7bSRussell King (Oracle) for (i = 0, size = 0; i < maxlen; i++) 44673472c83SRussell King (Oracle) if (str[i] != ' ' && str[i] != '\0') 44723571c7bSRussell King (Oracle) size = i + 1; 44823571c7bSRussell King (Oracle) 44923571c7bSRussell King (Oracle) return size; 45023571c7bSRussell King (Oracle) } 45123571c7bSRussell King (Oracle) 45223571c7bSRussell King (Oracle) static bool sfp_match(const char *qs, const char *str, size_t len) 45323571c7bSRussell King (Oracle) { 45423571c7bSRussell King (Oracle) if (!qs) 45523571c7bSRussell King (Oracle) return true; 45623571c7bSRussell King (Oracle) if (strlen(qs) != len) 45723571c7bSRussell King (Oracle) return false; 45823571c7bSRussell King (Oracle) return !strncmp(qs, str, len); 45923571c7bSRussell King (Oracle) } 46023571c7bSRussell King (Oracle) 46123571c7bSRussell King (Oracle) static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) 46223571c7bSRussell King (Oracle) { 46323571c7bSRussell King (Oracle) const struct sfp_quirk *q; 46423571c7bSRussell King (Oracle) unsigned int i; 46523571c7bSRussell King (Oracle) size_t vs, ps; 46623571c7bSRussell King (Oracle) 46723571c7bSRussell King (Oracle) vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); 46823571c7bSRussell King (Oracle) ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); 46923571c7bSRussell King (Oracle) 47023571c7bSRussell King (Oracle) for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) 47123571c7bSRussell King (Oracle) if (sfp_match(q->vendor, id->base.vendor_name, vs) && 47223571c7bSRussell King (Oracle) sfp_match(q->part, id->base.vendor_pn, ps)) 47323571c7bSRussell King (Oracle) return q; 47423571c7bSRussell King (Oracle) 47523571c7bSRussell King (Oracle) return NULL; 47623571c7bSRussell King (Oracle) } 47723571c7bSRussell King (Oracle) 47873970055SRussell King static unsigned long poll_jiffies; 47973970055SRussell King 48073970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 48173970055SRussell King { 48273970055SRussell King unsigned int i, state, v; 48373970055SRussell King 48473970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 48573970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 48673970055SRussell King continue; 48773970055SRussell King 48873970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 48973970055SRussell King if (v) 49073970055SRussell King state |= BIT(i); 49173970055SRussell King } 49273970055SRussell King 49373970055SRussell King return state; 49473970055SRussell King } 49573970055SRussell King 496259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 497259c8618SRussell King { 498259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 499259c8618SRussell King } 500259c8618SRussell King 50173970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 50273970055SRussell King { 50373970055SRussell King if (state & SFP_F_PRESENT) { 50473970055SRussell King /* If the module is present, drive the signals */ 50573970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 50673970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 50773970055SRussell King state & SFP_F_TX_DISABLE); 50873970055SRussell King if (state & SFP_F_RATE_SELECT) 50973970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 51073970055SRussell King state & SFP_F_RATE_SELECT); 51173970055SRussell King } else { 51273970055SRussell King /* Otherwise, let them float to the pull-ups */ 51373970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 51473970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 51573970055SRussell King if (state & SFP_F_RATE_SELECT) 51673970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 51773970055SRussell King } 51873970055SRussell King } 51973970055SRussell King 5203bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 5213bb35261SJon Nettleton size_t len) 52273970055SRussell King { 52373970055SRussell King struct i2c_msg msgs[2]; 524426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 525426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 52628e74a7cSRussell King size_t this_len; 52773970055SRussell King int ret; 52873970055SRussell King 52973970055SRussell King msgs[0].addr = bus_addr; 53073970055SRussell King msgs[0].flags = 0; 53173970055SRussell King msgs[0].len = 1; 53273970055SRussell King msgs[0].buf = &dev_addr; 53373970055SRussell King msgs[1].addr = bus_addr; 53473970055SRussell King msgs[1].flags = I2C_M_RD; 53573970055SRussell King msgs[1].len = len; 53673970055SRussell King msgs[1].buf = buf; 53773970055SRussell King 53828e74a7cSRussell King while (len) { 53928e74a7cSRussell King this_len = len; 5400d035bedSRussell King if (this_len > block_size) 5410d035bedSRussell King this_len = block_size; 54228e74a7cSRussell King 54328e74a7cSRussell King msgs[1].len = this_len; 54428e74a7cSRussell King 5453bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 54673970055SRussell King if (ret < 0) 54773970055SRussell King return ret; 54873970055SRussell King 54928e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 55028e74a7cSRussell King break; 55128e74a7cSRussell King 55228e74a7cSRussell King msgs[1].buf += this_len; 55328e74a7cSRussell King dev_addr += this_len; 55428e74a7cSRussell King len -= this_len; 55528e74a7cSRussell King } 55628e74a7cSRussell King 55728e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 55873970055SRussell King } 55973970055SRussell King 5603bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 56173970055SRussell King size_t len) 56273970055SRussell King { 5633bb35261SJon Nettleton struct i2c_msg msgs[1]; 5643bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 5653bb35261SJon Nettleton int ret; 5663bb35261SJon Nettleton 5673bb35261SJon Nettleton msgs[0].addr = bus_addr; 5683bb35261SJon Nettleton msgs[0].flags = 0; 5693bb35261SJon Nettleton msgs[0].len = 1 + len; 5703bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 5713bb35261SJon Nettleton if (!msgs[0].buf) 5723bb35261SJon Nettleton return -ENOMEM; 5733bb35261SJon Nettleton 5743bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 5753bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 5763bb35261SJon Nettleton 5773bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 5783bb35261SJon Nettleton 5793bb35261SJon Nettleton kfree(msgs[0].buf); 5803bb35261SJon Nettleton 5813bb35261SJon Nettleton if (ret < 0) 5823bb35261SJon Nettleton return ret; 5833bb35261SJon Nettleton 5843bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 58573970055SRussell King } 58673970055SRussell King 58773970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 58873970055SRussell King { 58973970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 59073970055SRussell King return -EINVAL; 59173970055SRussell King 59273970055SRussell King sfp->i2c = i2c; 59373970055SRussell King sfp->read = sfp_i2c_read; 5943bb35261SJon Nettleton sfp->write = sfp_i2c_write; 59573970055SRussell King 596e85b1347SMarek Behún return 0; 597e85b1347SMarek Behún } 598e85b1347SMarek Behún 599e85b1347SMarek Behún static int sfp_i2c_mdiobus_create(struct sfp *sfp) 600e85b1347SMarek Behún { 601e85b1347SMarek Behún struct mii_bus *i2c_mii; 602e85b1347SMarek Behún int ret; 603e85b1347SMarek Behún 60409bbedacSMarek Behún i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, sfp->mdio_protocol); 60573970055SRussell King if (IS_ERR(i2c_mii)) 60673970055SRussell King return PTR_ERR(i2c_mii); 60773970055SRussell King 60873970055SRussell King i2c_mii->name = "SFP I2C Bus"; 60973970055SRussell King i2c_mii->phy_mask = ~0; 61073970055SRussell King 61173970055SRussell King ret = mdiobus_register(i2c_mii); 61273970055SRussell King if (ret < 0) { 61373970055SRussell King mdiobus_free(i2c_mii); 61473970055SRussell King return ret; 61573970055SRussell King } 61673970055SRussell King 61773970055SRussell King sfp->i2c_mii = i2c_mii; 61873970055SRussell King 61973970055SRussell King return 0; 62073970055SRussell King } 62173970055SRussell King 622e85b1347SMarek Behún static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) 623e85b1347SMarek Behún { 624e85b1347SMarek Behún mdiobus_unregister(sfp->i2c_mii); 625e85b1347SMarek Behún sfp->i2c_mii = NULL; 626e85b1347SMarek Behún } 627e85b1347SMarek Behún 62873970055SRussell King /* Interface */ 62973970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 63073970055SRussell King { 63173970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 63273970055SRussell King } 63373970055SRussell King 6343bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 6353bb35261SJon Nettleton { 6363bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 6373bb35261SJon Nettleton } 6383bb35261SJon Nettleton 639a3c536fcSRussell King (Oracle) static int sfp_modify_u8(struct sfp *sfp, bool a2, u8 addr, u8 mask, u8 val) 640a3c536fcSRussell King (Oracle) { 641a3c536fcSRussell King (Oracle) int ret; 642a3c536fcSRussell King (Oracle) u8 old, v; 643a3c536fcSRussell King (Oracle) 644a3c536fcSRussell King (Oracle) ret = sfp_read(sfp, a2, addr, &old, sizeof(old)); 645a3c536fcSRussell King (Oracle) if (ret != sizeof(old)) 646a3c536fcSRussell King (Oracle) return ret; 647a3c536fcSRussell King (Oracle) 648a3c536fcSRussell King (Oracle) v = (old & ~mask) | (val & mask); 649a3c536fcSRussell King (Oracle) if (v == old) 650a3c536fcSRussell King (Oracle) return sizeof(v); 651a3c536fcSRussell King (Oracle) 652a3c536fcSRussell King (Oracle) return sfp_write(sfp, a2, addr, &v, sizeof(v)); 653a3c536fcSRussell King (Oracle) } 654a3c536fcSRussell King (Oracle) 655f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 656f3c9a666SRussell King { 657f3c9a666SRussell King unsigned int state = 0; 658f3c9a666SRussell King u8 status; 6590dea4d03SRussell King int ret; 660f3c9a666SRussell King 6610dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 6620dea4d03SRussell King if (ret == sizeof(status)) { 663f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 664f3c9a666SRussell King state |= SFP_F_LOS; 665f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 666f3c9a666SRussell King state |= SFP_F_TX_FAULT; 6670dea4d03SRussell King } else { 6680dea4d03SRussell King dev_err_ratelimited(sfp->dev, 6699ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 6709ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 6710dea4d03SRussell King /* Preserve the current state */ 6720dea4d03SRussell King state = sfp->state; 673f3c9a666SRussell King } 674f3c9a666SRussell King 675f3c9a666SRussell King return state & sfp->state_soft_mask; 676f3c9a666SRussell King } 677f3c9a666SRussell King 678f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 679f3c9a666SRussell King { 680a3c536fcSRussell King (Oracle) u8 mask = SFP_STATUS_TX_DISABLE_FORCE; 681a3c536fcSRussell King (Oracle) u8 val = 0; 682f3c9a666SRussell King 683f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 684a3c536fcSRussell King (Oracle) val |= SFP_STATUS_TX_DISABLE_FORCE; 685f3c9a666SRussell King 686a3c536fcSRussell King (Oracle) 687a3c536fcSRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); 688f3c9a666SRussell King } 689f3c9a666SRussell King 690f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 691f3c9a666SRussell King { 692f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 6938475c4b7SRussell King (Oracle) unsigned int mask = 0; 694f3c9a666SRussell King 695f3c9a666SRussell King sfp->state_soft_mask = 0; 6968475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 6978475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 6988475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 6998475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 7008475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 7018475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 7028475c4b7SRussell King (Oracle) 7038475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 7048475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 705f3c9a666SRussell King 706f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 707f3c9a666SRussell King !sfp->need_poll) 708f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 709f3c9a666SRussell King } 710f3c9a666SRussell King 711f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 712f3c9a666SRussell King { 713f3c9a666SRussell King sfp->state_soft_mask = 0; 714f3c9a666SRussell King } 715f3c9a666SRussell King 716f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 717f3c9a666SRussell King { 7188475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 7198475c4b7SRussell King (Oracle) unsigned int state; 720f3c9a666SRussell King 7218475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 7228475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 723f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 724f3c9a666SRussell King 725f3c9a666SRussell King return state; 726f3c9a666SRussell King } 727f3c9a666SRussell King 728f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 729f3c9a666SRussell King { 730f3c9a666SRussell King sfp->set_state(sfp, state); 731f3c9a666SRussell King 732f3c9a666SRussell King if (state & SFP_F_PRESENT && 733f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 734f3c9a666SRussell King sfp_soft_set_state(sfp, state); 735f3c9a666SRussell King } 736f3c9a666SRussell King 737418c1214SRussell King (Oracle) static void sfp_mod_state(struct sfp *sfp, unsigned int mask, unsigned int set) 738418c1214SRussell King (Oracle) { 739418c1214SRussell King (Oracle) sfp->state = (sfp->state & ~mask) | set; 740418c1214SRussell King (Oracle) sfp_set_state(sfp, sfp->state); 741418c1214SRussell King (Oracle) } 742418c1214SRussell King (Oracle) 74373970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 74473970055SRussell King { 74573970055SRussell King u8 *p, check; 74673970055SRussell King 74773970055SRussell King for (p = buf, check = 0; len; p++, len--) 74873970055SRussell King check += *p; 74973970055SRussell King 75073970055SRussell King return check; 75173970055SRussell King } 75273970055SRussell King 7531323061aSAndrew Lunn /* hwmon */ 7541323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 7551323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 7561323061aSAndrew Lunn enum hwmon_sensor_types type, 7571323061aSAndrew Lunn u32 attr, int channel) 7581323061aSAndrew Lunn { 7591323061aSAndrew Lunn const struct sfp *sfp = data; 7601323061aSAndrew Lunn 7611323061aSAndrew Lunn switch (type) { 7621323061aSAndrew Lunn case hwmon_temp: 7631323061aSAndrew Lunn switch (attr) { 7641323061aSAndrew Lunn case hwmon_temp_min_alarm: 7651323061aSAndrew Lunn case hwmon_temp_max_alarm: 7661323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7671323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7681323061aSAndrew Lunn case hwmon_temp_min: 7691323061aSAndrew Lunn case hwmon_temp_max: 7701323061aSAndrew Lunn case hwmon_temp_lcrit: 7711323061aSAndrew Lunn case hwmon_temp_crit: 772a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 773a33710bdSAndrew Lunn return 0; 774df561f66SGustavo A. R. Silva fallthrough; 775a33710bdSAndrew Lunn case hwmon_temp_input: 776c1236979SAndrew Lunn case hwmon_temp_label: 7771323061aSAndrew Lunn return 0444; 7781323061aSAndrew Lunn default: 7791323061aSAndrew Lunn return 0; 7801323061aSAndrew Lunn } 7811323061aSAndrew Lunn case hwmon_in: 7821323061aSAndrew Lunn switch (attr) { 7831323061aSAndrew Lunn case hwmon_in_min_alarm: 7841323061aSAndrew Lunn case hwmon_in_max_alarm: 7851323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7861323061aSAndrew Lunn case hwmon_in_crit_alarm: 7871323061aSAndrew Lunn case hwmon_in_min: 7881323061aSAndrew Lunn case hwmon_in_max: 7891323061aSAndrew Lunn case hwmon_in_lcrit: 7901323061aSAndrew Lunn case hwmon_in_crit: 791a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 792a33710bdSAndrew Lunn return 0; 793df561f66SGustavo A. R. Silva fallthrough; 794a33710bdSAndrew Lunn case hwmon_in_input: 795c1236979SAndrew Lunn case hwmon_in_label: 7961323061aSAndrew Lunn return 0444; 7971323061aSAndrew Lunn default: 7981323061aSAndrew Lunn return 0; 7991323061aSAndrew Lunn } 8001323061aSAndrew Lunn case hwmon_curr: 8011323061aSAndrew Lunn switch (attr) { 8021323061aSAndrew Lunn case hwmon_curr_min_alarm: 8031323061aSAndrew Lunn case hwmon_curr_max_alarm: 8041323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 8051323061aSAndrew Lunn case hwmon_curr_crit_alarm: 8061323061aSAndrew Lunn case hwmon_curr_min: 8071323061aSAndrew Lunn case hwmon_curr_max: 8081323061aSAndrew Lunn case hwmon_curr_lcrit: 8091323061aSAndrew Lunn case hwmon_curr_crit: 810a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 811a33710bdSAndrew Lunn return 0; 812df561f66SGustavo A. R. Silva fallthrough; 813a33710bdSAndrew Lunn case hwmon_curr_input: 814c1236979SAndrew Lunn case hwmon_curr_label: 8151323061aSAndrew Lunn return 0444; 8161323061aSAndrew Lunn default: 8171323061aSAndrew Lunn return 0; 8181323061aSAndrew Lunn } 8191323061aSAndrew Lunn case hwmon_power: 8201323061aSAndrew Lunn /* External calibration of receive power requires 8211323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 8221323061aSAndrew Lunn * is not easy, so just skip it. If the module does 8231323061aSAndrew Lunn * not require external calibration, we can however 8241323061aSAndrew Lunn * show receiver power, since FP is then not needed. 8251323061aSAndrew Lunn */ 8261323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 8271323061aSAndrew Lunn channel == 1) 8281323061aSAndrew Lunn return 0; 8291323061aSAndrew Lunn switch (attr) { 8301323061aSAndrew Lunn case hwmon_power_min_alarm: 8311323061aSAndrew Lunn case hwmon_power_max_alarm: 8321323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 8331323061aSAndrew Lunn case hwmon_power_crit_alarm: 8341323061aSAndrew Lunn case hwmon_power_min: 8351323061aSAndrew Lunn case hwmon_power_max: 8361323061aSAndrew Lunn case hwmon_power_lcrit: 8371323061aSAndrew Lunn case hwmon_power_crit: 838a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 839a33710bdSAndrew Lunn return 0; 840df561f66SGustavo A. R. Silva fallthrough; 841a33710bdSAndrew Lunn case hwmon_power_input: 842c1236979SAndrew Lunn case hwmon_power_label: 8431323061aSAndrew Lunn return 0444; 8441323061aSAndrew Lunn default: 8451323061aSAndrew Lunn return 0; 8461323061aSAndrew Lunn } 8471323061aSAndrew Lunn default: 8481323061aSAndrew Lunn return 0; 8491323061aSAndrew Lunn } 8501323061aSAndrew Lunn } 8511323061aSAndrew Lunn 8521323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 8531323061aSAndrew Lunn { 8541323061aSAndrew Lunn __be16 val; 8551323061aSAndrew Lunn int err; 8561323061aSAndrew Lunn 8571323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 8581323061aSAndrew Lunn if (err < 0) 8591323061aSAndrew Lunn return err; 8601323061aSAndrew Lunn 8611323061aSAndrew Lunn *value = be16_to_cpu(val); 8621323061aSAndrew Lunn 8631323061aSAndrew Lunn return 0; 8641323061aSAndrew Lunn } 8651323061aSAndrew Lunn 8661323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 8671323061aSAndrew Lunn { 8680cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8691323061aSAndrew Lunn } 8701323061aSAndrew Lunn 8711323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 8721323061aSAndrew Lunn long *value) 8731323061aSAndrew Lunn { 8741323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 8751323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 8761323061aSAndrew Lunn } 8771323061aSAndrew Lunn 8781323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 8791323061aSAndrew Lunn { 8801323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 8811323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 8821323061aSAndrew Lunn 8831323061aSAndrew Lunn if (*value >= 0x8000) 8841323061aSAndrew Lunn *value -= 0x10000; 8851323061aSAndrew Lunn 8861323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 8871323061aSAndrew Lunn } 8881323061aSAndrew Lunn 8891323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 8901323061aSAndrew Lunn { 8911323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 8921323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 8931323061aSAndrew Lunn 8941323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8951323061aSAndrew Lunn } 8961323061aSAndrew Lunn 8971323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 8981323061aSAndrew Lunn { 8991323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 9001323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 9011323061aSAndrew Lunn 9021323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 9031323061aSAndrew Lunn } 9041323061aSAndrew Lunn 9051323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 9061323061aSAndrew Lunn { 9071323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 9081323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 9091323061aSAndrew Lunn 9101323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9111323061aSAndrew Lunn } 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn static int sfp_hwmon_read_temp(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_temp(sfp, value); 9221323061aSAndrew Lunn 9231323061aSAndrew Lunn return 0; 9241323061aSAndrew Lunn } 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn static int sfp_hwmon_read_vcc(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_vcc(sfp, value); 9351323061aSAndrew Lunn 9361323061aSAndrew Lunn return 0; 9371323061aSAndrew Lunn } 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn static int sfp_hwmon_read_bias(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_calibrate_bias(sfp, value); 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn return 0; 9501323061aSAndrew Lunn } 9511323061aSAndrew Lunn 9521323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 9531323061aSAndrew Lunn { 9541323061aSAndrew Lunn int err; 9551323061aSAndrew Lunn 9561323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9571323061aSAndrew Lunn if (err < 0) 9581323061aSAndrew Lunn return err; 9591323061aSAndrew Lunn 9601323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9611323061aSAndrew Lunn 9621323061aSAndrew Lunn return 0; 9631323061aSAndrew Lunn } 9641323061aSAndrew Lunn 9651323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 9661323061aSAndrew Lunn { 9671323061aSAndrew Lunn int err; 9681323061aSAndrew Lunn 9691323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9701323061aSAndrew Lunn if (err < 0) 9711323061aSAndrew Lunn return err; 9721323061aSAndrew Lunn 9731323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9741323061aSAndrew Lunn 9751323061aSAndrew Lunn return 0; 9761323061aSAndrew Lunn } 9771323061aSAndrew Lunn 9781323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 9791323061aSAndrew Lunn { 9801323061aSAndrew Lunn u8 status; 9811323061aSAndrew Lunn int err; 9821323061aSAndrew Lunn 9831323061aSAndrew Lunn switch (attr) { 9841323061aSAndrew Lunn case hwmon_temp_input: 9851323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 9861323061aSAndrew Lunn 9871323061aSAndrew Lunn case hwmon_temp_lcrit: 9881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 9891323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9901323061aSAndrew Lunn return 0; 9911323061aSAndrew Lunn 9921323061aSAndrew Lunn case hwmon_temp_min: 9931323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 9941323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9951323061aSAndrew Lunn return 0; 9961323061aSAndrew Lunn case hwmon_temp_max: 9971323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 9981323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9991323061aSAndrew Lunn return 0; 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn case hwmon_temp_crit: 10021323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 10031323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10041323061aSAndrew Lunn return 0; 10051323061aSAndrew Lunn 10061323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 10071323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10081323061aSAndrew Lunn if (err < 0) 10091323061aSAndrew Lunn return err; 10101323061aSAndrew Lunn 10111323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 10121323061aSAndrew Lunn return 0; 10131323061aSAndrew Lunn 10141323061aSAndrew Lunn case hwmon_temp_min_alarm: 10151323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10161323061aSAndrew Lunn if (err < 0) 10171323061aSAndrew Lunn return err; 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 10201323061aSAndrew Lunn return 0; 10211323061aSAndrew Lunn 10221323061aSAndrew Lunn case hwmon_temp_max_alarm: 10231323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10241323061aSAndrew Lunn if (err < 0) 10251323061aSAndrew Lunn return err; 10261323061aSAndrew Lunn 10271323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 10281323061aSAndrew Lunn return 0; 10291323061aSAndrew Lunn 10301323061aSAndrew Lunn case hwmon_temp_crit_alarm: 10311323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10321323061aSAndrew Lunn if (err < 0) 10331323061aSAndrew Lunn return err; 10341323061aSAndrew Lunn 10351323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 10361323061aSAndrew Lunn return 0; 10371323061aSAndrew Lunn default: 10381323061aSAndrew Lunn return -EOPNOTSUPP; 10391323061aSAndrew Lunn } 10401323061aSAndrew Lunn 10411323061aSAndrew Lunn return -EOPNOTSUPP; 10421323061aSAndrew Lunn } 10431323061aSAndrew Lunn 10441323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 10451323061aSAndrew Lunn { 10461323061aSAndrew Lunn u8 status; 10471323061aSAndrew Lunn int err; 10481323061aSAndrew Lunn 10491323061aSAndrew Lunn switch (attr) { 10501323061aSAndrew Lunn case hwmon_in_input: 10511323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 10521323061aSAndrew Lunn 10531323061aSAndrew Lunn case hwmon_in_lcrit: 10541323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 10551323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10561323061aSAndrew Lunn return 0; 10571323061aSAndrew Lunn 10581323061aSAndrew Lunn case hwmon_in_min: 10591323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 10601323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10611323061aSAndrew Lunn return 0; 10621323061aSAndrew Lunn 10631323061aSAndrew Lunn case hwmon_in_max: 10641323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 10651323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10661323061aSAndrew Lunn return 0; 10671323061aSAndrew Lunn 10681323061aSAndrew Lunn case hwmon_in_crit: 10691323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 10701323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10711323061aSAndrew Lunn return 0; 10721323061aSAndrew Lunn 10731323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 10741323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10751323061aSAndrew Lunn if (err < 0) 10761323061aSAndrew Lunn return err; 10771323061aSAndrew Lunn 10781323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 10791323061aSAndrew Lunn return 0; 10801323061aSAndrew Lunn 10811323061aSAndrew Lunn case hwmon_in_min_alarm: 10821323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10831323061aSAndrew Lunn if (err < 0) 10841323061aSAndrew Lunn return err; 10851323061aSAndrew Lunn 10861323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 10871323061aSAndrew Lunn return 0; 10881323061aSAndrew Lunn 10891323061aSAndrew Lunn case hwmon_in_max_alarm: 10901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10911323061aSAndrew Lunn if (err < 0) 10921323061aSAndrew Lunn return err; 10931323061aSAndrew Lunn 10941323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 10951323061aSAndrew Lunn return 0; 10961323061aSAndrew Lunn 10971323061aSAndrew Lunn case hwmon_in_crit_alarm: 10981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10991323061aSAndrew Lunn if (err < 0) 11001323061aSAndrew Lunn return err; 11011323061aSAndrew Lunn 11021323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 11031323061aSAndrew Lunn return 0; 11041323061aSAndrew Lunn default: 11051323061aSAndrew Lunn return -EOPNOTSUPP; 11061323061aSAndrew Lunn } 11071323061aSAndrew Lunn 11081323061aSAndrew Lunn return -EOPNOTSUPP; 11091323061aSAndrew Lunn } 11101323061aSAndrew Lunn 11111323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 11121323061aSAndrew Lunn { 11131323061aSAndrew Lunn u8 status; 11141323061aSAndrew Lunn int err; 11151323061aSAndrew Lunn 11161323061aSAndrew Lunn switch (attr) { 11171323061aSAndrew Lunn case hwmon_curr_input: 11181323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 11191323061aSAndrew Lunn 11201323061aSAndrew Lunn case hwmon_curr_lcrit: 11211323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 11221323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11231323061aSAndrew Lunn return 0; 11241323061aSAndrew Lunn 11251323061aSAndrew Lunn case hwmon_curr_min: 11261323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 11271323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11281323061aSAndrew Lunn return 0; 11291323061aSAndrew Lunn 11301323061aSAndrew Lunn case hwmon_curr_max: 11311323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 11321323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11331323061aSAndrew Lunn return 0; 11341323061aSAndrew Lunn 11351323061aSAndrew Lunn case hwmon_curr_crit: 11361323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 11371323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11381323061aSAndrew Lunn return 0; 11391323061aSAndrew Lunn 11401323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 11411323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11421323061aSAndrew Lunn if (err < 0) 11431323061aSAndrew Lunn return err; 11441323061aSAndrew Lunn 11451323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 11461323061aSAndrew Lunn return 0; 11471323061aSAndrew Lunn 11481323061aSAndrew Lunn case hwmon_curr_min_alarm: 11491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11501323061aSAndrew Lunn if (err < 0) 11511323061aSAndrew Lunn return err; 11521323061aSAndrew Lunn 11531323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 11541323061aSAndrew Lunn return 0; 11551323061aSAndrew Lunn 11561323061aSAndrew Lunn case hwmon_curr_max_alarm: 11571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11581323061aSAndrew Lunn if (err < 0) 11591323061aSAndrew Lunn return err; 11601323061aSAndrew Lunn 11611323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 11621323061aSAndrew Lunn return 0; 11631323061aSAndrew Lunn 11641323061aSAndrew Lunn case hwmon_curr_crit_alarm: 11651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11661323061aSAndrew Lunn if (err < 0) 11671323061aSAndrew Lunn return err; 11681323061aSAndrew Lunn 11691323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 11701323061aSAndrew Lunn return 0; 11711323061aSAndrew Lunn default: 11721323061aSAndrew Lunn return -EOPNOTSUPP; 11731323061aSAndrew Lunn } 11741323061aSAndrew Lunn 11751323061aSAndrew Lunn return -EOPNOTSUPP; 11761323061aSAndrew Lunn } 11771323061aSAndrew Lunn 11781323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 11791323061aSAndrew Lunn { 11801323061aSAndrew Lunn u8 status; 11811323061aSAndrew Lunn int err; 11821323061aSAndrew Lunn 11831323061aSAndrew Lunn switch (attr) { 11841323061aSAndrew Lunn case hwmon_power_input: 11851323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 11861323061aSAndrew Lunn 11871323061aSAndrew Lunn case hwmon_power_lcrit: 11881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 11891323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11901323061aSAndrew Lunn return 0; 11911323061aSAndrew Lunn 11921323061aSAndrew Lunn case hwmon_power_min: 11931323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 11941323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11951323061aSAndrew Lunn return 0; 11961323061aSAndrew Lunn 11971323061aSAndrew Lunn case hwmon_power_max: 11981323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 11991323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12001323061aSAndrew Lunn return 0; 12011323061aSAndrew Lunn 12021323061aSAndrew Lunn case hwmon_power_crit: 12031323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 12041323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12051323061aSAndrew Lunn return 0; 12061323061aSAndrew Lunn 12071323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12081323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12091323061aSAndrew Lunn if (err < 0) 12101323061aSAndrew Lunn return err; 12111323061aSAndrew Lunn 12121323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 12131323061aSAndrew Lunn return 0; 12141323061aSAndrew Lunn 12151323061aSAndrew Lunn case hwmon_power_min_alarm: 12161323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12171323061aSAndrew Lunn if (err < 0) 12181323061aSAndrew Lunn return err; 12191323061aSAndrew Lunn 12201323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 12211323061aSAndrew Lunn return 0; 12221323061aSAndrew Lunn 12231323061aSAndrew Lunn case hwmon_power_max_alarm: 12241323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12251323061aSAndrew Lunn if (err < 0) 12261323061aSAndrew Lunn return err; 12271323061aSAndrew Lunn 12281323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 12291323061aSAndrew Lunn return 0; 12301323061aSAndrew Lunn 12311323061aSAndrew Lunn case hwmon_power_crit_alarm: 12321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12331323061aSAndrew Lunn if (err < 0) 12341323061aSAndrew Lunn return err; 12351323061aSAndrew Lunn 12361323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 12371323061aSAndrew Lunn return 0; 12381323061aSAndrew Lunn default: 12391323061aSAndrew Lunn return -EOPNOTSUPP; 12401323061aSAndrew Lunn } 12411323061aSAndrew Lunn 12421323061aSAndrew Lunn return -EOPNOTSUPP; 12431323061aSAndrew Lunn } 12441323061aSAndrew Lunn 12451323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 12461323061aSAndrew Lunn { 12471323061aSAndrew Lunn u8 status; 12481323061aSAndrew Lunn int err; 12491323061aSAndrew Lunn 12501323061aSAndrew Lunn switch (attr) { 12511323061aSAndrew Lunn case hwmon_power_input: 12521323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 12531323061aSAndrew Lunn 12541323061aSAndrew Lunn case hwmon_power_lcrit: 12551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 12561323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12571323061aSAndrew Lunn return 0; 12581323061aSAndrew Lunn 12591323061aSAndrew Lunn case hwmon_power_min: 12601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 12611323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12621323061aSAndrew Lunn return 0; 12631323061aSAndrew Lunn 12641323061aSAndrew Lunn case hwmon_power_max: 12651323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 12661323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12671323061aSAndrew Lunn return 0; 12681323061aSAndrew Lunn 12691323061aSAndrew Lunn case hwmon_power_crit: 12701323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 12711323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12721323061aSAndrew Lunn return 0; 12731323061aSAndrew Lunn 12741323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12761323061aSAndrew Lunn if (err < 0) 12771323061aSAndrew Lunn return err; 12781323061aSAndrew Lunn 12791323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 12801323061aSAndrew Lunn return 0; 12811323061aSAndrew Lunn 12821323061aSAndrew Lunn case hwmon_power_min_alarm: 12831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12841323061aSAndrew Lunn if (err < 0) 12851323061aSAndrew Lunn return err; 12861323061aSAndrew Lunn 12871323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 12881323061aSAndrew Lunn return 0; 12891323061aSAndrew Lunn 12901323061aSAndrew Lunn case hwmon_power_max_alarm: 12911323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12921323061aSAndrew Lunn if (err < 0) 12931323061aSAndrew Lunn return err; 12941323061aSAndrew Lunn 12951323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 12961323061aSAndrew Lunn return 0; 12971323061aSAndrew Lunn 12981323061aSAndrew Lunn case hwmon_power_crit_alarm: 12991323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 13001323061aSAndrew Lunn if (err < 0) 13011323061aSAndrew Lunn return err; 13021323061aSAndrew Lunn 13031323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 13041323061aSAndrew Lunn return 0; 13051323061aSAndrew Lunn default: 13061323061aSAndrew Lunn return -EOPNOTSUPP; 13071323061aSAndrew Lunn } 13081323061aSAndrew Lunn 13091323061aSAndrew Lunn return -EOPNOTSUPP; 13101323061aSAndrew Lunn } 13111323061aSAndrew Lunn 13121323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 13131323061aSAndrew Lunn u32 attr, int channel, long *value) 13141323061aSAndrew Lunn { 13151323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 13161323061aSAndrew Lunn 13171323061aSAndrew Lunn switch (type) { 13181323061aSAndrew Lunn case hwmon_temp: 13191323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 13201323061aSAndrew Lunn case hwmon_in: 13211323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 13221323061aSAndrew Lunn case hwmon_curr: 13231323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 13241323061aSAndrew Lunn case hwmon_power: 13251323061aSAndrew Lunn switch (channel) { 13261323061aSAndrew Lunn case 0: 13271323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 13281323061aSAndrew Lunn case 1: 13291323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 13301323061aSAndrew Lunn default: 13311323061aSAndrew Lunn return -EOPNOTSUPP; 13321323061aSAndrew Lunn } 13331323061aSAndrew Lunn default: 13341323061aSAndrew Lunn return -EOPNOTSUPP; 13351323061aSAndrew Lunn } 13361323061aSAndrew Lunn } 13371323061aSAndrew Lunn 1338c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1339c1236979SAndrew Lunn "TX_power", 1340c1236979SAndrew Lunn "RX_power", 1341c1236979SAndrew Lunn }; 1342c1236979SAndrew Lunn 1343c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1344c1236979SAndrew Lunn enum hwmon_sensor_types type, 1345c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1346c1236979SAndrew Lunn { 1347c1236979SAndrew Lunn switch (type) { 1348c1236979SAndrew Lunn case hwmon_curr: 1349c1236979SAndrew Lunn switch (attr) { 1350c1236979SAndrew Lunn case hwmon_curr_label: 1351c1236979SAndrew Lunn *str = "bias"; 1352c1236979SAndrew Lunn return 0; 1353c1236979SAndrew Lunn default: 1354c1236979SAndrew Lunn return -EOPNOTSUPP; 1355c1236979SAndrew Lunn } 1356c1236979SAndrew Lunn break; 1357c1236979SAndrew Lunn case hwmon_temp: 1358c1236979SAndrew Lunn switch (attr) { 1359c1236979SAndrew Lunn case hwmon_temp_label: 1360c1236979SAndrew Lunn *str = "temperature"; 1361c1236979SAndrew Lunn return 0; 1362c1236979SAndrew Lunn default: 1363c1236979SAndrew Lunn return -EOPNOTSUPP; 1364c1236979SAndrew Lunn } 1365c1236979SAndrew Lunn break; 1366c1236979SAndrew Lunn case hwmon_in: 1367c1236979SAndrew Lunn switch (attr) { 1368c1236979SAndrew Lunn case hwmon_in_label: 1369c1236979SAndrew Lunn *str = "VCC"; 1370c1236979SAndrew Lunn return 0; 1371c1236979SAndrew Lunn default: 1372c1236979SAndrew Lunn return -EOPNOTSUPP; 1373c1236979SAndrew Lunn } 1374c1236979SAndrew Lunn break; 1375c1236979SAndrew Lunn case hwmon_power: 1376c1236979SAndrew Lunn switch (attr) { 1377c1236979SAndrew Lunn case hwmon_power_label: 1378c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1379c1236979SAndrew Lunn return 0; 1380c1236979SAndrew Lunn default: 1381c1236979SAndrew Lunn return -EOPNOTSUPP; 1382c1236979SAndrew Lunn } 1383c1236979SAndrew Lunn break; 1384c1236979SAndrew Lunn default: 1385c1236979SAndrew Lunn return -EOPNOTSUPP; 1386c1236979SAndrew Lunn } 1387c1236979SAndrew Lunn 1388c1236979SAndrew Lunn return -EOPNOTSUPP; 1389c1236979SAndrew Lunn } 1390c1236979SAndrew Lunn 13911323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 13921323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 13931323061aSAndrew Lunn .read = sfp_hwmon_read, 1394c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 13951323061aSAndrew Lunn }; 13961323061aSAndrew Lunn 1397490fde26SKrzysztof Kozlowski static const struct hwmon_channel_info * const sfp_hwmon_info[] = { 1398815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1399815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1400815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 14011323061aSAndrew Lunn HWMON_I_INPUT | 14021323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 14031323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 14041323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1405c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1406815f5f57SBeniamin Sandu HWMON_I_LABEL), 1407815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1408815f5f57SBeniamin Sandu HWMON_T_INPUT | 1409815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1410815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1411815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1412815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1413815f5f57SBeniamin Sandu HWMON_T_LABEL), 1414815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 14151323061aSAndrew Lunn HWMON_C_INPUT | 14161323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 14171323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 14181323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1419c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1420815f5f57SBeniamin Sandu HWMON_C_LABEL), 1421815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 14221323061aSAndrew Lunn /* Transmit power */ 14231323061aSAndrew Lunn HWMON_P_INPUT | 14241323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 14251323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 14261323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1427c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1428c1236979SAndrew Lunn HWMON_P_LABEL, 14291323061aSAndrew Lunn /* Receive power */ 14301323061aSAndrew Lunn HWMON_P_INPUT | 14311323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 14321323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 14331323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1434c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1435815f5f57SBeniamin Sandu HWMON_P_LABEL), 14361323061aSAndrew Lunn NULL, 14371323061aSAndrew Lunn }; 14381323061aSAndrew Lunn 14391323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 14401323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 14411323061aSAndrew Lunn .info = sfp_hwmon_info, 14421323061aSAndrew Lunn }; 14431323061aSAndrew Lunn 1444139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 14451323061aSAndrew Lunn { 1446139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 14473f118c44SMichael Walle int err; 14481323061aSAndrew Lunn 1449426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1450426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1451426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1452426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1453426c6cbcSPali Rohár * skip registration of hwmon device. 1454426c6cbcSPali Rohár */ 1455426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1456426c6cbcSPali Rohár dev_info(sfp->dev, 1457426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1458426c6cbcSPali Rohár dev_info(sfp->dev, 1459426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1460426c6cbcSPali Rohár return; 1461426c6cbcSPali Rohár } 1462426c6cbcSPali Rohár 1463139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1464139d3a21SRussell King if (err < 0) { 1465139d3a21SRussell King if (sfp->hwmon_tries--) { 1466139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1467139d3a21SRussell King T_PROBE_RETRY_SLOW); 1468139d3a21SRussell King } else { 14699ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 14709ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1471139d3a21SRussell King } 1472139d3a21SRussell King return; 1473139d3a21SRussell King } 1474139d3a21SRussell King 14753f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 14763f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1477139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1478139d3a21SRussell King return; 1479139d3a21SRussell King } 1480139d3a21SRussell King 1481139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1482139d3a21SRussell King sfp->hwmon_name, sfp, 1483139d3a21SRussell King &sfp_hwmon_chip_info, 1484139d3a21SRussell King NULL); 1485139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1486139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1487139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1488139d3a21SRussell King } 1489139d3a21SRussell King 1490139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1491139d3a21SRussell King { 1492f94b9bedSRussell King (Oracle) if (sfp->have_a2 && sfp->id.ext.diagmon & SFP_DIAGMON_DDM) { 1493139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1494139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 1495f94b9bedSRussell King (Oracle) } 14961323061aSAndrew Lunn 1497139d3a21SRussell King return 0; 14981323061aSAndrew Lunn } 14991323061aSAndrew Lunn 15001323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15011323061aSAndrew Lunn { 1502139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 15033e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 15041323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 15053e322474SAndrew Lunn sfp->hwmon_dev = NULL; 15061323061aSAndrew Lunn kfree(sfp->hwmon_name); 15071323061aSAndrew Lunn } 15083e322474SAndrew Lunn } 1509139d3a21SRussell King 1510139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1511139d3a21SRussell King { 1512139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1513139d3a21SRussell King 1514139d3a21SRussell King return 0; 1515139d3a21SRussell King } 1516139d3a21SRussell King 1517139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1518139d3a21SRussell King { 1519139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1520139d3a21SRussell King } 15211323061aSAndrew Lunn #else 15221323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 15231323061aSAndrew Lunn { 15241323061aSAndrew Lunn return 0; 15251323061aSAndrew Lunn } 15261323061aSAndrew Lunn 15271323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15281323061aSAndrew Lunn { 15291323061aSAndrew Lunn } 1530139d3a21SRussell King 1531139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1532139d3a21SRussell King { 1533139d3a21SRussell King return 0; 1534139d3a21SRussell King } 1535139d3a21SRussell King 1536139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1537139d3a21SRussell King { 1538139d3a21SRussell King } 15391323061aSAndrew Lunn #endif 15401323061aSAndrew Lunn 154173970055SRussell King /* Helpers */ 154273970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 154373970055SRussell King { 154473970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 154573970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 1546418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, SFP_F_TX_DISABLE); 154773970055SRussell King } 154873970055SRussell King 154973970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 155073970055SRussell King { 155173970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 155273970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 1553418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, 0); 155473970055SRussell King } 155573970055SRussell King 15569cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 15579cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 15589cc8976cSRussell King { 15599cc8976cSRussell King struct sfp *sfp = s->private; 15609cc8976cSRussell King 15619cc8976cSRussell King seq_printf(s, "Module state: %s\n", 15629cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 15639cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 15649cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 15659cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 15669cc8976cSRussell King seq_printf(s, "Device state: %s\n", 15679cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 15689cc8976cSRussell King seq_printf(s, "Main state: %s\n", 15699cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 15709cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 15719cc8976cSRussell King sfp->sm_fault_retries); 15729cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 15739cc8976cSRussell King sfp->sm_phy_retries); 15749cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 15759cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 15769cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 15779cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 15789cc8976cSRussell King return 0; 15799cc8976cSRussell King } 15809cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 15819cc8976cSRussell King 15829cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15839cc8976cSRussell King { 15849cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 15859cc8976cSRussell King 15869cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 15879cc8976cSRussell King &sfp_debug_state_fops); 15889cc8976cSRussell King } 15899cc8976cSRussell King 15909cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15919cc8976cSRussell King { 15929cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 15939cc8976cSRussell King } 15949cc8976cSRussell King #else 15959cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15969cc8976cSRussell King { 15979cc8976cSRussell King } 15989cc8976cSRussell King 15999cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 16009cc8976cSRussell King { 16019cc8976cSRussell King } 16029cc8976cSRussell King #endif 16039cc8976cSRussell King 160473970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 160573970055SRussell King { 160673970055SRussell King unsigned int state = sfp->state; 160773970055SRussell King 160873970055SRussell King if (state & SFP_F_TX_DISABLE) 160973970055SRussell King return; 161073970055SRussell King 161173970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 161273970055SRussell King 161373970055SRussell King udelay(T_RESET_US); 161473970055SRussell King 161573970055SRussell King sfp_set_state(sfp, state); 161673970055SRussell King } 161773970055SRussell King 161873970055SRussell King /* SFP state machine */ 161973970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 162073970055SRussell King { 162173970055SRussell King if (timeout) 162273970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 162373970055SRussell King timeout); 162473970055SRussell King else 162573970055SRussell King cancel_delayed_work(&sfp->timeout); 162673970055SRussell King } 162773970055SRussell King 162873970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 162973970055SRussell King unsigned int timeout) 163073970055SRussell King { 163173970055SRussell King sfp->sm_state = state; 163273970055SRussell King sfp_sm_set_timer(sfp, timeout); 163373970055SRussell King } 163473970055SRussell King 16350936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1636516b29edSFlorian Fainelli unsigned int timeout) 163773970055SRussell King { 163873970055SRussell King sfp->sm_mod_state = state; 163973970055SRussell King sfp_sm_set_timer(sfp, timeout); 164073970055SRussell King } 164173970055SRussell King 164273970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 164373970055SRussell King { 164473970055SRussell King sfp_remove_phy(sfp->sfp_bus); 164573970055SRussell King phy_device_remove(sfp->mod_phy); 164673970055SRussell King phy_device_free(sfp->mod_phy); 164773970055SRussell King sfp->mod_phy = NULL; 164873970055SRussell King } 164973970055SRussell King 1650324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 165173970055SRussell King { 165273970055SRussell King struct phy_device *phy; 165373970055SRussell King int err; 165473970055SRussell King 1655324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 16561cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 16571cb89a14SRussell King return PTR_ERR(phy); 165820b56ed9SRussell King if (IS_ERR(phy)) { 16599ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1660256e43cbSRussell King return PTR_ERR(phy); 166173970055SRussell King } 166273970055SRussell King 16639a484621SRussell King err = phy_device_register(phy); 16649a484621SRussell King if (err) { 16659a484621SRussell King phy_device_free(phy); 16669ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 16679ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1668256e43cbSRussell King return err; 16699a484621SRussell King } 16709a484621SRussell King 167173970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 167273970055SRussell King if (err) { 167373970055SRussell King phy_device_remove(phy); 167473970055SRussell King phy_device_free(phy); 16759ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1676256e43cbSRussell King return err; 167773970055SRussell King } 167873970055SRussell King 167973970055SRussell King sfp->mod_phy = phy; 1680256e43cbSRussell King 1681256e43cbSRussell King return 0; 168273970055SRussell King } 168373970055SRussell King 168473970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 168573970055SRussell King { 168673970055SRussell King sfp_link_up(sfp->sfp_bus); 168773970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 168873970055SRussell King } 168973970055SRussell King 169073970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 169173970055SRussell King { 169273970055SRussell King sfp_link_down(sfp->sfp_bus); 169373970055SRussell King } 169473970055SRussell King 169573970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 169673970055SRussell King { 1697624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1698624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1699624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1700624407d2SRussell King bool los = false; 170173970055SRussell King 1702710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1703624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1704624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 170573970055SRussell King */ 1706624407d2SRussell King if (los_options == los_inverted) 1707624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1708624407d2SRussell King else if (los_options == los_normal) 1709624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 171073970055SRussell King 171173970055SRussell King if (los) 171273970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 171373970055SRussell King else 171473970055SRussell King sfp_sm_link_up(sfp); 171573970055SRussell King } 171673970055SRussell King 1717710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1718710dfbb0SRussell King { 1719624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1720624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1721624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1722624407d2SRussell King 1723624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1724624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1725710dfbb0SRussell King } 1726710dfbb0SRussell King 1727710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1728710dfbb0SRussell King { 1729624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1730624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1731624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1732624407d2SRussell King 1733624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1734624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1735710dfbb0SRussell King } 1736710dfbb0SRussell King 173763ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 173873970055SRussell King { 1739281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1740516b29edSFlorian Fainelli dev_err(sfp->dev, 1741516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 174273970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 174373970055SRussell King } else { 174473970055SRussell King if (warn) 174573970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 174673970055SRussell King 174763ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 174873970055SRussell King } 174973970055SRussell King } 175073970055SRussell King 1751e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1752e85b1347SMarek Behún { 1753e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1754e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1755e85b1347SMarek Behún 1756e85b1347SMarek Behún return 0; 1757e85b1347SMarek Behún } 1758e85b1347SMarek Behún 17599a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 17609a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 17619a484621SRussell King * or clause 45 PHY. 17629a484621SRussell King * 17639a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 17649a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 17659a484621SRussell King * PHY driver to determine. 17669a484621SRussell King * 17679a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 17689a484621SRussell King * mode according to the negotiated line speed. 17699a484621SRussell King */ 1770256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1771181f29daSRussell King { 1772256e43cbSRussell King int err = 0; 1773256e43cbSRussell King 1774e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1775e85b1347SMarek Behún case MDIO_I2C_NONE: 17769a484621SRussell King break; 17779a484621SRussell King 1778e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1779324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 17809a484621SRussell King break; 1781e85b1347SMarek Behún 1782e85b1347SMarek Behún case MDIO_I2C_C45: 1783324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1784e85b1347SMarek Behún break; 178509bbedacSMarek Behún 178609bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1787324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 178809bbedacSMarek Behún break; 17899a484621SRussell King } 1790e85b1347SMarek Behún 1791256e43cbSRussell King return err; 179273970055SRussell King } 179373970055SRussell King 1794ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 17953bb35261SJon Nettleton { 1796ed32abb1SRussell King u32 power_mW = 1000; 17975765cee1SRussell King (Oracle) bool supports_a2; 17983bb35261SJon Nettleton 179918cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 180018cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1801ed32abb1SRussell King power_mW = 1500; 1802f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1803f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1804f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1805ed32abb1SRussell King power_mW = 2000; 18063bb35261SJon Nettleton 180702eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 180802eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 180902eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 181002eaf5a7SRussell King (Oracle) return 0; 181102eaf5a7SRussell King (Oracle) } 181202eaf5a7SRussell King (Oracle) 18135765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 18145765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 18155765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 18165765cee1SRussell King (Oracle) 1817ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 18187cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 18195765cee1SRussell King (Oracle) if (!supports_a2) { 18207cfa9c92SRussell King /* The module appears not to implement bus address 18217cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 18227cfa9c92SRussell King * indicated mode. 18237cfa9c92SRussell King */ 18243bb35261SJon Nettleton dev_err(sfp->dev, 18253bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1826ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18273bb35261SJon Nettleton return -EINVAL; 18287cfa9c92SRussell King } else { 18293bb35261SJon Nettleton dev_warn(sfp->dev, 18303bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1831ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18323bb35261SJon Nettleton return 0; 18333bb35261SJon Nettleton } 18347cfa9c92SRussell King } 18357cfa9c92SRussell King 18365765cee1SRussell King (Oracle) if (!supports_a2) { 18375765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 18385765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 18395765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 18405765cee1SRussell King (Oracle) */ 18415765cee1SRussell King (Oracle) return 0; 18425765cee1SRussell King (Oracle) } 18435765cee1SRussell King (Oracle) 18447cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 18457cfa9c92SRussell King * an address change sequence, warn the user that the module may 18467cfa9c92SRussell King * not be functional. 18477cfa9c92SRussell King */ 18485765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 18497cfa9c92SRussell King dev_warn(sfp->dev, 185007f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 18517cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 18527cfa9c92SRussell King return 0; 18537cfa9c92SRussell King } 18543bb35261SJon Nettleton 1855ed32abb1SRussell King sfp->module_power_mW = power_mW; 1856ed32abb1SRussell King 1857ed32abb1SRussell King return 0; 1858ed32abb1SRussell King } 1859ed32abb1SRussell King 1860b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1861ed32abb1SRussell King { 1862ed32abb1SRussell King int err; 1863ed32abb1SRussell King 1864bd1432f6SRussell King (Oracle) err = sfp_modify_u8(sfp, true, SFP_EXT_STATUS, 1865bd1432f6SRussell King (Oracle) SFP_EXT_STATUS_PWRLVL_SELECT, 1866bd1432f6SRussell King (Oracle) enable ? SFP_EXT_STATUS_PWRLVL_SELECT : 0); 1867bd1432f6SRussell King (Oracle) if (err != sizeof(u8)) { 1868bd1432f6SRussell King (Oracle) dev_err(sfp->dev, "failed to %sable high power: %pe\n", 1869bd1432f6SRussell King (Oracle) enable ? "en" : "dis", ERR_PTR(err)); 1870b036a554SRussell King return -EAGAIN; 18713bb35261SJon Nettleton } 18723bb35261SJon Nettleton 1873b036a554SRussell King if (enable) 18743bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1875ed32abb1SRussell King sfp->module_power_mW / 1000, 1876ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 18773bb35261SJon Nettleton 1878b036a554SRussell King return 0; 18793bb35261SJon Nettleton } 18803bb35261SJon Nettleton 1881426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1882426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1883426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1884426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1885426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1886426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1887426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1888426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1889426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1890426c6cbcSPali Rohár * at a time. 18910d035bedSRussell King */ 1892426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 18930d035bedSRussell King { 1894426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 18950d035bedSRussell King 1896426c6cbcSPali Rohár /* Already using byte IO */ 1897426c6cbcSPali Rohár if (block_size == 1) 1898426c6cbcSPali Rohár return false; 1899426c6cbcSPali Rohár 1900426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1901426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1902426c6cbcSPali Rohár return false; 19030d035bedSRussell King } 1904426c6cbcSPali Rohár return true; 19050d035bedSRussell King } 19060d035bedSRussell King 1907b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1908b18432c5SChris Healy { 1909b18432c5SChris Healy u8 check; 1910b18432c5SChris Healy int err; 1911b18432c5SChris Healy 1912b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1913b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1914b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1915b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1916b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1917b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1918b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1919b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1920b18432c5SChris Healy if (err != 3) { 19219ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19229ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 19239ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1924b18432c5SChris Healy return err; 1925b18432c5SChris Healy } 1926b18432c5SChris Healy 1927b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1928b18432c5SChris Healy mdelay(50); 1929b18432c5SChris Healy 1930b18432c5SChris Healy /* Update base structure checksum */ 1931b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1932b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1933b18432c5SChris Healy if (err != 1) { 19349ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19359ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 19369ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1937b18432c5SChris Healy return err; 1938b18432c5SChris Healy } 1939b18432c5SChris Healy } 1940b18432c5SChris Healy return 0; 1941b18432c5SChris Healy } 1942b18432c5SChris Healy 1943f94b9bedSRussell King (Oracle) static int sfp_module_parse_sff8472(struct sfp *sfp) 1944f94b9bedSRussell King (Oracle) { 1945f94b9bedSRussell King (Oracle) /* If the module requires address swap mode, warn about it */ 1946f94b9bedSRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1947f94b9bedSRussell King (Oracle) dev_warn(sfp->dev, 1948f94b9bedSRussell King (Oracle) "module address swap to access page 0xA2 is not supported.\n"); 1949f94b9bedSRussell King (Oracle) else 1950f94b9bedSRussell King (Oracle) sfp->have_a2 = true; 1951f94b9bedSRussell King (Oracle) 1952f94b9bedSRussell King (Oracle) return 0; 1953f94b9bedSRussell King (Oracle) } 1954f94b9bedSRussell King (Oracle) 1955e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 195673970055SRussell King { 195773970055SRussell King /* SFP module inserted - read I2C data */ 195873970055SRussell King struct sfp_eeprom_id id; 1959b18432c5SChris Healy bool cotsworks_sfbg; 1960981f1f80SRussell King bool cotsworks; 196173970055SRussell King u8 check; 19623bb35261SJon Nettleton int ret; 196373970055SRussell King 1964813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 19650d035bedSRussell King 19660d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 19673bb35261SJon Nettleton if (ret < 0) { 1968e117be74SRussell King if (report) 19699ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 19709ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 197173970055SRussell King return -EAGAIN; 197273970055SRussell King } 197373970055SRussell King 19740d035bedSRussell King if (ret != sizeof(id.base)) { 19759ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 197673970055SRussell King return -EAGAIN; 197773970055SRussell King } 197873970055SRussell King 1979426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1980426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1981426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1982426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1983426c6cbcSPali Rohár * is really required and we have no other option. 1984426c6cbcSPali Rohár */ 1985426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1986426c6cbcSPali Rohár dev_info(sfp->dev, 1987426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1988426c6cbcSPali Rohár dev_info(sfp->dev, 1989426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1990426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1991426c6cbcSPali Rohár 1992426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1993426c6cbcSPali Rohár if (ret < 0) { 1994426c6cbcSPali Rohár if (report) 19959ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19969ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 19979ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1998426c6cbcSPali Rohár return -EAGAIN; 1999426c6cbcSPali Rohár } 2000426c6cbcSPali Rohár 2001426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 20029ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 20039ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2004426c6cbcSPali Rohár return -EAGAIN; 2005426c6cbcSPali Rohár } 2006426c6cbcSPali Rohár } 2007426c6cbcSPali Rohár 2008981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 2009981f1f80SRussell King * do the final programming with the final module part number, 2010981f1f80SRussell King * serial number and date code. 2011981f1f80SRussell King */ 2012981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 2013b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 2014b18432c5SChris Healy 2015b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 2016b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 2017b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 2018b18432c5SChris Healy */ 2019b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 2020b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 2021b18432c5SChris Healy if (ret < 0) 2022b18432c5SChris Healy return ret; 2023b18432c5SChris Healy } 2024981f1f80SRussell King 202573970055SRussell King /* Validate the checksum over the base structure */ 202673970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 202773970055SRussell King if (check != id.base.cc_base) { 2028981f1f80SRussell King if (cotsworks) { 2029981f1f80SRussell King dev_warn(sfp->dev, 2030981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 2031981f1f80SRussell King check, id.base.cc_base); 2032981f1f80SRussell King } else { 203373970055SRussell King dev_err(sfp->dev, 2034981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2035981f1f80SRussell King check, id.base.cc_base); 203673970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2037981f1f80SRussell King 16, 1, &id, sizeof(id), true); 203873970055SRussell King return -EINVAL; 203973970055SRussell King } 2040981f1f80SRussell King } 204173970055SRussell King 20420d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 20430d035bedSRussell King if (ret < 0) { 20440d035bedSRussell King if (report) 20459ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 20469ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 20470d035bedSRussell King return -EAGAIN; 20480d035bedSRussell King } 20490d035bedSRussell King 20500d035bedSRussell King if (ret != sizeof(id.ext)) { 20519ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 20520d035bedSRussell King return -EAGAIN; 20530d035bedSRussell King } 20540d035bedSRussell King 205573970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 205673970055SRussell King if (check != id.ext.cc_ext) { 2057981f1f80SRussell King if (cotsworks) { 2058981f1f80SRussell King dev_warn(sfp->dev, 2059981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2060981f1f80SRussell King check, id.ext.cc_ext); 2061981f1f80SRussell King } else { 206273970055SRussell King dev_err(sfp->dev, 2063981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2064981f1f80SRussell King check, id.ext.cc_ext); 2065981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2066981f1f80SRussell King 16, 1, &id, sizeof(id), true); 206773970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 206873970055SRussell King } 2069981f1f80SRussell King } 207073970055SRussell King 207173970055SRussell King sfp->id = id; 207273970055SRussell King 2073a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2074a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2075a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2076a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2077a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2078a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 207973970055SRussell King 2080259c8618SRussell King /* Check whether we support this module */ 2081f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2082259c8618SRussell King dev_err(sfp->dev, 2083259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 208473970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 208573970055SRussell King return -EINVAL; 208673970055SRussell King } 208773970055SRussell King 2088f94b9bedSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance != SFP_SFF8472_COMPLIANCE_NONE) { 2089f94b9bedSRussell King (Oracle) ret = sfp_module_parse_sff8472(sfp); 2090f94b9bedSRussell King (Oracle) if (ret < 0) 2091f94b9bedSRussell King (Oracle) return ret; 2092f94b9bedSRussell King (Oracle) } 2093ec7681bdSRussell King 2094ed32abb1SRussell King /* Parse the module power requirement */ 2095ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2096ed32abb1SRussell King if (ret < 0) 2097ed32abb1SRussell King return ret; 2098ed32abb1SRussell King 20998475c4b7SRussell King (Oracle) /* Initialise state bits to use from hardware */ 21008475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 21018475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 21028475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_DISABLE; 21038475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 21048475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_FAULT; 21058475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 21068475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_LOS; 21078475c4b7SRussell King (Oracle) 210826c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2109324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 211026c97a2dSRussell King 21112069624dSMatthew Hagan sfp->tx_fault_ignore = false; 21122069624dSMatthew Hagan 2113e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2114e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2115e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2116e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2117e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2118e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2119e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2120e85b1347SMarek Behún else 2121e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2122e85b1347SMarek Behún 212323571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 212427541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 212527541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 212623571c7bSRussell King (Oracle) 2127b036a554SRussell King return 0; 212873970055SRussell King } 212973970055SRussell King 213073970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 213173970055SRussell King { 213273f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 213373970055SRussell King sfp_module_remove(sfp->sfp_bus); 213473970055SRussell King 21351323061aSAndrew Lunn sfp_hwmon_remove(sfp); 21361323061aSAndrew Lunn 213773970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2138ed32abb1SRussell King sfp->module_power_mW = 0; 2139f94b9bedSRussell King (Oracle) sfp->have_a2 = false; 214073970055SRussell King 214173970055SRussell King dev_info(sfp->dev, "module removed\n"); 214273970055SRussell King } 214373970055SRussell King 21446b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2145e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 214673970055SRussell King { 2147e85d81a1SRussell King switch (sfp->sm_dev_state) { 2148e85d81a1SRussell King default: 21496b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 21506b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 21516b0da5c9SRussell King break; 21526b0da5c9SRussell King 21536b0da5c9SRussell King case SFP_DEV_DOWN: 21546b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21556b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21566b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2157e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2158e85d81a1SRussell King break; 215973970055SRussell King 2160e85d81a1SRussell King case SFP_DEV_UP: 21616b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21626b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21636b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2164e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2165e85d81a1SRussell King break; 2166e85d81a1SRussell King } 2167e85d81a1SRussell King } 216873970055SRussell King 2169d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2170d900954fSRussell King * the on-board EEPROM, and sets up the power level. 217173970055SRussell King */ 2172e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2173e85d81a1SRussell King { 2174b036a554SRussell King int err; 2175b036a554SRussell King 2176b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2177b036a554SRussell King if (event == SFP_E_REMOVE) { 2178d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2179d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2180b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2181b036a554SRussell King return; 2182b036a554SRussell King } 2183b036a554SRussell King 2184b036a554SRussell King /* Handle device detach globally */ 218573f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 218673f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2187b036a554SRussell King if (sfp->module_power_mW > 1000 && 2188b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2189b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 219073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2191d2e816c0SRussell King return; 2192d2e816c0SRussell King } 2193d2e816c0SRussell King 219473970055SRussell King switch (sfp->sm_mod_state) { 219573970055SRussell King default: 2196e117be74SRussell King if (event == SFP_E_INSERT) { 2197d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2198e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2199e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2200e117be74SRussell King } 220173970055SRussell King break; 220273970055SRussell King 220373970055SRussell King case SFP_MOD_PROBE: 220473f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2205b036a554SRussell King if (event != SFP_E_TIMEOUT) 2206b036a554SRussell King break; 220773970055SRussell King 2208e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2209b036a554SRussell King if (err == -EAGAIN) { 2210e117be74SRussell King if (sfp->sm_mod_tries_init && 2211e117be74SRussell King --sfp->sm_mod_tries_init) { 2212e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2213b036a554SRussell King break; 2214e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2215e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2216e117be74SRussell King dev_warn(sfp->dev, 2217e117be74SRussell King "please wait, module slow to respond\n"); 2218e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2219e117be74SRussell King break; 2220e117be74SRussell King } 2221b036a554SRussell King } 2222b036a554SRussell King if (err < 0) { 2223b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2224b036a554SRussell King break; 2225b036a554SRussell King } 2226b036a554SRussell King 222704361b8bSRussell King (Oracle) /* Force a poll to re-read the hardware signal state after 222804361b8bSRussell King (Oracle) * sfp_sm_mod_probe() changed state_hw_mask. 222904361b8bSRussell King (Oracle) */ 223004361b8bSRussell King (Oracle) mod_delayed_work(system_wq, &sfp->poll, 1); 223104361b8bSRussell King (Oracle) 223238ecd706SRussell King err = sfp_hwmon_insert(sfp); 223338ecd706SRussell King if (err) 22349ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 22359ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 223638ecd706SRussell King 223773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2238df561f66SGustavo A. R. Silva fallthrough; 223973f5e847SRussell King case SFP_MOD_WAITDEV: 224073f5e847SRussell King /* Ensure that the device is attached before proceeding */ 224173f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 224273f5e847SRussell King break; 224373f5e847SRussell King 224473f5e847SRussell King /* Report the module insertion to the upstream device */ 224523571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 224623571c7bSRussell King (Oracle) sfp->quirk); 224773f5e847SRussell King if (err < 0) { 224873f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 224973f5e847SRussell King break; 225073f5e847SRussell King } 225173f5e847SRussell King 2252b036a554SRussell King /* If this is a power level 1 module, we are done */ 2253b036a554SRussell King if (sfp->module_power_mW <= 1000) 2254b036a554SRussell King goto insert; 2255b036a554SRussell King 2256b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2257df561f66SGustavo A. R. Silva fallthrough; 2258b036a554SRussell King case SFP_MOD_HPOWER: 2259b036a554SRussell King /* Enable high power mode */ 2260b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 226173f5e847SRussell King if (err < 0) { 226273f5e847SRussell King if (err != -EAGAIN) { 226373f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 22640936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 226573f5e847SRussell King } else { 2266e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 226773f5e847SRussell King } 226873f5e847SRussell King break; 226973f5e847SRussell King } 227073f5e847SRussell King 227173f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 227273970055SRussell King break; 227373970055SRussell King 2274b036a554SRussell King case SFP_MOD_WAITPWR: 2275b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2276b036a554SRussell King if (event != SFP_E_TIMEOUT) 2277b036a554SRussell King break; 2278b036a554SRussell King 2279b036a554SRussell King insert: 22800936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 22813bb35261SJon Nettleton break; 2282b036a554SRussell King 228373970055SRussell King case SFP_MOD_PRESENT: 228473970055SRussell King case SFP_MOD_ERROR: 228573970055SRussell King break; 228673970055SRussell King } 228773970055SRussell King } 228873970055SRussell King 2289e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2290e85d81a1SRussell King { 2291eefa6f1fSRussell King unsigned long timeout; 22921cb89a14SRussell King int ret; 2293eefa6f1fSRussell King 229473970055SRussell King /* Some events are global */ 229573970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 229673970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 229773970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 229873970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 229973970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 230073970055SRussell King sfp_sm_link_down(sfp); 230174c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 230274c551caSRussell King sfp_module_stop(sfp->sfp_bus); 230373970055SRussell King if (sfp->mod_phy) 230473970055SRussell King sfp_sm_phy_detach(sfp); 2305e85b1347SMarek Behún if (sfp->i2c_mii) 2306e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 23071539e0d3SRussell King sfp_module_tx_disable(sfp); 2308f3c9a666SRussell King sfp_soft_stop_poll(sfp); 230973970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 231073970055SRussell King return; 231173970055SRussell King } 231273970055SRussell King 231373970055SRussell King /* The main state machine */ 231473970055SRussell King switch (sfp->sm_state) { 231573970055SRussell King case SFP_S_DOWN: 2316eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2317eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2318eefa6f1fSRussell King break; 2319eefa6f1fSRussell King 23205daed426SRussell King (Oracle) /* Only use the soft state bits if we have access to the A2h 23215daed426SRussell King (Oracle) * memory, which implies that we have some level of SFF-8472 23225daed426SRussell King (Oracle) * compliance. 23235daed426SRussell King (Oracle) */ 23245daed426SRussell King (Oracle) if (sfp->have_a2) 2325f3c9a666SRussell King sfp_soft_start_poll(sfp); 2326f3c9a666SRussell King 2327f3c9a666SRussell King sfp_module_tx_enable(sfp); 2328eefa6f1fSRussell King 2329eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2330281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2331eefa6f1fSRussell King 2332eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2333eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2334324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2335324e88cbSMarek Behún * specific modules). 2336eefa6f1fSRussell King */ 2337324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2338eefa6f1fSRussell King break; 2339eefa6f1fSRussell King 2340eefa6f1fSRussell King case SFP_S_WAIT: 2341eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2342eefa6f1fSRussell King break; 2343eefa6f1fSRussell King 2344eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 234526c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 234626c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 234726c97a2dSRussell King * initialise, which is indicated by TX_FAULT 234826c97a2dSRussell King * deasserting. 2349181f29daSRussell King */ 235026c97a2dSRussell King timeout = sfp->module_t_start_up; 2351324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2352324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2353eefa6f1fSRussell King else 2354eefa6f1fSRussell King timeout = 1; 2355eefa6f1fSRussell King 2356eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2357eefa6f1fSRussell King } else { 2358eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2359eefa6f1fSRussell King * finished initialising. 2360eefa6f1fSRussell King */ 2361eefa6f1fSRussell King goto init_done; 2362181f29daSRussell King } 236373970055SRussell King break; 236473970055SRussell King 236573970055SRussell King case SFP_S_INIT: 2366d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2367e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 236826c97a2dSRussell King * or t_start_up, so assume there is a fault. 2369d23751a0SRussell King */ 2370d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2371281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2372d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 23731cb89a14SRussell King init_done: 2374e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2375e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2376e85b1347SMarek Behún if (ret < 0) { 2377e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2378e85b1347SMarek Behún break; 2379e85b1347SMarek Behún } 23801cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 23811cb89a14SRussell King goto phy_probe; 23821cb89a14SRussell King } 23831cb89a14SRussell King break; 23841cb89a14SRussell King 23851cb89a14SRussell King case SFP_S_INIT_PHY: 23861cb89a14SRussell King if (event != SFP_E_TIMEOUT) 23871cb89a14SRussell King break; 23881cb89a14SRussell King phy_probe: 23891cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2390d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2391d23751a0SRussell King */ 23921cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 23931cb89a14SRussell King if (ret == -ENODEV) { 23941cb89a14SRussell King if (--sfp->sm_phy_retries) { 23951cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 23961cb89a14SRussell King break; 23971cb89a14SRussell King } else { 23981cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 23991cb89a14SRussell King } 24001cb89a14SRussell King } else if (ret) { 2401256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2402256e43cbSRussell King break; 2403256e43cbSRussell King } 240474c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 240574c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 240674c551caSRussell King break; 240774c551caSRussell King } 2408d23751a0SRussell King sfp_sm_link_check_los(sfp); 2409d23751a0SRussell King 2410d23751a0SRussell King /* Reset the fault retry count */ 2411281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2412d23751a0SRussell King break; 2413d23751a0SRussell King 2414d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2415d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2416d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 241726c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2418d23751a0SRussell King } 241973970055SRussell King break; 242073970055SRussell King 242173970055SRussell King case SFP_S_WAIT_LOS: 242273970055SRussell King if (event == SFP_E_TX_FAULT) 242363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2424710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 242573970055SRussell King sfp_sm_link_up(sfp); 242673970055SRussell King break; 242773970055SRussell King 242873970055SRussell King case SFP_S_LINK_UP: 242973970055SRussell King if (event == SFP_E_TX_FAULT) { 243073970055SRussell King sfp_sm_link_down(sfp); 243163ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2432710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 243373970055SRussell King sfp_sm_link_down(sfp); 243473970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 243573970055SRussell King } 243673970055SRussell King break; 243773970055SRussell King 243873970055SRussell King case SFP_S_TX_FAULT: 243973970055SRussell King if (event == SFP_E_TIMEOUT) { 244073970055SRussell King sfp_module_tx_fault_reset(sfp); 244126c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 244273970055SRussell King } 244373970055SRussell King break; 244473970055SRussell King 244573970055SRussell King case SFP_S_REINIT: 244673970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 244763ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 244873970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 244973970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 245073970055SRussell King sfp_sm_link_check_los(sfp); 245173970055SRussell King } 245273970055SRussell King break; 245373970055SRussell King 245473970055SRussell King case SFP_S_TX_DISABLE: 245573970055SRussell King break; 245673970055SRussell King } 2457e85d81a1SRussell King } 2458e85d81a1SRussell King 2459*97a49205SRussell King (Oracle) static void __sfp_sm_event(struct sfp *sfp, unsigned int event) 2460e85d81a1SRussell King { 2461e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2462e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2463e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2464e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2465e85d81a1SRussell King event_to_str(event)); 2466e85d81a1SRussell King 2467e85d81a1SRussell King sfp_sm_device(sfp, event); 24686b0da5c9SRussell King sfp_sm_module(sfp, event); 2469e85d81a1SRussell King sfp_sm_main(sfp, event); 247073970055SRussell King 24714005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 24724005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 24734005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 24744005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 2475*97a49205SRussell King (Oracle) } 247673970055SRussell King 2477*97a49205SRussell King (Oracle) static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2478*97a49205SRussell King (Oracle) { 2479*97a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 2480*97a49205SRussell King (Oracle) __sfp_sm_event(sfp, event); 248173970055SRussell King mutex_unlock(&sfp->sm_mutex); 248273970055SRussell King } 248373970055SRussell King 2484b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2485b5bfc21aSRussell King { 24866b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2487b5bfc21aSRussell King } 2488b5bfc21aSRussell King 2489b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2490b5bfc21aSRussell King { 24916b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2492b5bfc21aSRussell King } 2493b5bfc21aSRussell King 249473970055SRussell King static void sfp_start(struct sfp *sfp) 249573970055SRussell King { 249673970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 249773970055SRussell King } 249873970055SRussell King 249973970055SRussell King static void sfp_stop(struct sfp *sfp) 250073970055SRussell King { 250173970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 250273970055SRussell King } 250373970055SRussell King 250473970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 250573970055SRussell King { 250673970055SRussell King /* locking... and check module is present */ 250773970055SRussell King 2508ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2509ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 251073970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 251173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 251273970055SRussell King } else { 251373970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 251473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 251573970055SRussell King } 251673970055SRussell King return 0; 251773970055SRussell King } 251873970055SRussell King 251973970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 252073970055SRussell King u8 *data) 252173970055SRussell King { 252273970055SRussell King unsigned int first, last, len; 252373970055SRussell King int ret; 252473970055SRussell King 2525bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2526bef227c1SIvan Bornyakov return -ENODEV; 2527bef227c1SIvan Bornyakov 252873970055SRussell King if (ee->len == 0) 252973970055SRussell King return -EINVAL; 253073970055SRussell King 253173970055SRussell King first = ee->offset; 253273970055SRussell King last = ee->offset + ee->len; 253373970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 253473970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 253573970055SRussell King len -= first; 253673970055SRussell King 25372794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 253873970055SRussell King if (ret < 0) 253973970055SRussell King return ret; 254073970055SRussell King 254173970055SRussell King first += len; 254273970055SRussell King data += len; 254373970055SRussell King } 25442794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 254573970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 254673970055SRussell King len -= first; 254773970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 254873970055SRussell King 25492794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 255073970055SRussell King if (ret < 0) 255173970055SRussell King return ret; 255273970055SRussell King } 255373970055SRussell King return 0; 255473970055SRussell King } 255573970055SRussell King 2556d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2557d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2558d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2559d740513fSAndrew Lunn { 2560bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2561bef227c1SIvan Bornyakov return -ENODEV; 2562bef227c1SIvan Bornyakov 2563d740513fSAndrew Lunn if (page->bank) { 2564d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2565d740513fSAndrew Lunn return -EOPNOTSUPP; 2566d740513fSAndrew Lunn } 2567d740513fSAndrew Lunn 2568d740513fSAndrew Lunn if (page->page) { 2569d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2570d740513fSAndrew Lunn return -EOPNOTSUPP; 2571d740513fSAndrew Lunn } 2572d740513fSAndrew Lunn 2573d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2574d740513fSAndrew Lunn page->i2c_address != 0x51) { 2575d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2576d740513fSAndrew Lunn return -EOPNOTSUPP; 2577d740513fSAndrew Lunn } 2578d740513fSAndrew Lunn 2579d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2580d740513fSAndrew Lunn page->data, page->length); 2581d740513fSAndrew Lunn }; 2582d740513fSAndrew Lunn 258373970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2584b5bfc21aSRussell King .attach = sfp_attach, 2585b5bfc21aSRussell King .detach = sfp_detach, 258673970055SRussell King .start = sfp_start, 258773970055SRussell King .stop = sfp_stop, 258873970055SRussell King .module_info = sfp_module_info, 258973970055SRussell King .module_eeprom = sfp_module_eeprom, 2590d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 259173970055SRussell King }; 259273970055SRussell King 259373970055SRussell King static void sfp_timeout(struct work_struct *work) 259473970055SRussell King { 259573970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 259673970055SRussell King 259773970055SRussell King rtnl_lock(); 259873970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 259973970055SRussell King rtnl_unlock(); 260073970055SRussell King } 260173970055SRussell King 260273970055SRussell King static void sfp_check_state(struct sfp *sfp) 260373970055SRussell King { 260473970055SRussell King unsigned int state, i, changed; 260573970055SRussell King 2606d47e5a43SRussell King (Oracle) rtnl_lock(); 2607a9fe964eSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 260873970055SRussell King state = sfp_get_state(sfp); 260973970055SRussell King changed = state ^ sfp->state; 26102069624dSMatthew Hagan if (sfp->tx_fault_ignore) 26112069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 26122069624dSMatthew Hagan else 261373970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 261473970055SRussell King 261573970055SRussell King for (i = 0; i < GPIO_MAX; i++) 261673970055SRussell King if (changed & BIT(i)) 2617f35cb547SRussell King (Oracle) dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_names[i], 261873970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 261973970055SRussell King 262073970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 262173970055SRussell King sfp->state = state; 262273970055SRussell King 2623*97a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 262473970055SRussell King if (changed & SFP_F_PRESENT) 2625*97a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_PRESENT ? 262673970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 262773970055SRussell King 262873970055SRussell King if (changed & SFP_F_TX_FAULT) 2629*97a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 263073970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 263173970055SRussell King 263273970055SRussell King if (changed & SFP_F_LOS) 2633*97a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_LOS ? 263473970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 2635*97a49205SRussell King (Oracle) mutex_unlock(&sfp->sm_mutex); 26362158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 2637a9fe964eSRussell King (Oracle) rtnl_unlock(); 263873970055SRussell King } 263973970055SRussell King 264073970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 264173970055SRussell King { 264273970055SRussell King struct sfp *sfp = data; 264373970055SRussell King 264473970055SRussell King sfp_check_state(sfp); 264573970055SRussell King 264673970055SRussell King return IRQ_HANDLED; 264773970055SRussell King } 264873970055SRussell King 264973970055SRussell King static void sfp_poll(struct work_struct *work) 265073970055SRussell King { 265173970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 265273970055SRussell King 265373970055SRussell King sfp_check_state(sfp); 2654f3c9a666SRussell King 2655f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2656f3c9a666SRussell King sfp->need_poll) 265773970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 265873970055SRussell King } 265973970055SRussell King 266073970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 266173970055SRussell King { 266273970055SRussell King struct sfp *sfp; 266373970055SRussell King 266473970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 266573970055SRussell King if (!sfp) 266673970055SRussell King return ERR_PTR(-ENOMEM); 266773970055SRussell King 266873970055SRussell King sfp->dev = dev; 2669813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 267073970055SRussell King 267173970055SRussell King mutex_init(&sfp->sm_mutex); 26722158e856SRobert Hancock mutex_init(&sfp->st_mutex); 267373970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 267473970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 267573970055SRussell King 2676139d3a21SRussell King sfp_hwmon_init(sfp); 2677139d3a21SRussell King 267873970055SRussell King return sfp; 267973970055SRussell King } 268073970055SRussell King 268173970055SRussell King static void sfp_cleanup(void *data) 268273970055SRussell King { 268373970055SRussell King struct sfp *sfp = data; 268473970055SRussell King 2685139d3a21SRussell King sfp_hwmon_exit(sfp); 2686139d3a21SRussell King 268773970055SRussell King cancel_delayed_work_sync(&sfp->poll); 268873970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 268973970055SRussell King if (sfp->i2c_mii) { 269073970055SRussell King mdiobus_unregister(sfp->i2c_mii); 269173970055SRussell King mdiobus_free(sfp->i2c_mii); 269273970055SRussell King } 269373970055SRussell King if (sfp->i2c) 269473970055SRussell King i2c_put_adapter(sfp->i2c); 269573970055SRussell King kfree(sfp); 269673970055SRussell King } 269773970055SRussell King 269815309fb2SRussell King (Oracle) static int sfp_i2c_get(struct sfp *sfp) 269915309fb2SRussell King (Oracle) { 270015309fb2SRussell King (Oracle) struct fwnode_handle *h; 270115309fb2SRussell King (Oracle) struct i2c_adapter *i2c; 270215309fb2SRussell King (Oracle) int err; 270315309fb2SRussell King (Oracle) 270415309fb2SRussell King (Oracle) h = fwnode_find_reference(dev_fwnode(sfp->dev), "i2c-bus", 0); 270515309fb2SRussell King (Oracle) if (IS_ERR(h)) { 270615309fb2SRussell King (Oracle) dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 270715309fb2SRussell King (Oracle) return -ENODEV; 270815309fb2SRussell King (Oracle) } 270915309fb2SRussell King (Oracle) 2710ff31a0c4SRussell King (Oracle) i2c = i2c_get_adapter_by_fwnode(h); 271115309fb2SRussell King (Oracle) if (!i2c) { 271215309fb2SRussell King (Oracle) err = -EPROBE_DEFER; 271315309fb2SRussell King (Oracle) goto put; 271415309fb2SRussell King (Oracle) } 271515309fb2SRussell King (Oracle) 271615309fb2SRussell King (Oracle) err = sfp_i2c_configure(sfp, i2c); 271715309fb2SRussell King (Oracle) if (err) 271815309fb2SRussell King (Oracle) i2c_put_adapter(i2c); 271915309fb2SRussell King (Oracle) put: 272015309fb2SRussell King (Oracle) fwnode_handle_put(h); 272115309fb2SRussell King (Oracle) return err; 272215309fb2SRussell King (Oracle) } 272315309fb2SRussell King (Oracle) 272473970055SRussell King static int sfp_probe(struct platform_device *pdev) 272573970055SRussell King { 2726259c8618SRussell King const struct sff_data *sff; 27275411ca71SChris Healy char *sfp_irq_name; 272873970055SRussell King struct sfp *sfp; 2729257c2559SRobert Hancock int err, i; 273073970055SRussell King 273173970055SRussell King sfp = sfp_alloc(&pdev->dev); 273273970055SRussell King if (IS_ERR(sfp)) 273373970055SRussell King return PTR_ERR(sfp); 273473970055SRussell King 273573970055SRussell King platform_set_drvdata(pdev, sfp); 273673970055SRussell King 27370a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 273873970055SRussell King if (err < 0) 273973970055SRussell King return err; 274073970055SRussell King 2741b71dda81SRussell King (Oracle) sff = device_get_match_data(sfp->dev); 2742b71dda81SRussell King (Oracle) if (!sff) 2743b71dda81SRussell King (Oracle) sff = &sfp_data; 2744259c8618SRussell King 2745b71dda81SRussell King (Oracle) sfp->type = sff; 27467ce236faSRuslan Babayev 274715309fb2SRussell King (Oracle) err = sfp_i2c_get(sfp); 274815309fb2SRussell King (Oracle) if (err) 274973970055SRussell King return err; 275073970055SRussell King 2751259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2752259c8618SRussell King if (sff->gpios & BIT(i)) { 275373970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 2754f35cb547SRussell King (Oracle) gpio_names[i], gpio_flags[i]); 275573970055SRussell King if (IS_ERR(sfp->gpio[i])) 275673970055SRussell King return PTR_ERR(sfp->gpio[i]); 275773970055SRussell King } 275873970055SRussell King 27598475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 27608475c4b7SRussell King (Oracle) 276173970055SRussell King sfp->get_state = sfp_gpio_get_state; 276273970055SRussell King sfp->set_state = sfp_gpio_set_state; 2763259c8618SRussell King 2764259c8618SRussell King /* Modules that have no detect signal are always present */ 2765259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2766259c8618SRussell King sfp->get_state = sff_gpio_get_state; 276773970055SRussell King 27683bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 27693bb35261SJon Nettleton &sfp->max_power_mW); 277002eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 277102eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 277202eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 277302eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 27743bb35261SJon Nettleton sfp->max_power_mW = 1000; 277502eaf5a7SRussell King (Oracle) } 27763bb35261SJon Nettleton 27773bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 27783bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 27793bb35261SJon Nettleton 278073970055SRussell King /* Get the initial state, and always signal TX disable, 278173970055SRussell King * since the network interface will not be up. 278273970055SRussell King */ 278373970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 278473970055SRussell King 278573970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 278673970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 278773970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 278873970055SRussell King sfp_set_state(sfp, sfp->state); 278973970055SRussell King sfp_module_tx_disable(sfp); 279073f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 279173f5e847SRussell King rtnl_lock(); 279273f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 279373f5e847SRussell King rtnl_unlock(); 279473f5e847SRussell King } 279573970055SRussell King 279673970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 279773970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 279873970055SRussell King continue; 279973970055SRussell King 2800257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 280196216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 280296216181SYueHaibing sfp->gpio_irq[i] = 0; 2803f3c9a666SRussell King sfp->need_poll = true; 280473970055SRussell King continue; 280573970055SRussell King } 280673970055SRussell King 28075411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 28085411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 2809f35cb547SRussell King (Oracle) gpio_names[i]); 28105411ca71SChris Healy 28118cb601f1SChris Healy if (!sfp_irq_name) 28128cb601f1SChris Healy return -ENOMEM; 28138cb601f1SChris Healy 2814257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2815257c2559SRobert Hancock NULL, sfp_irq, 281673970055SRussell King IRQF_ONESHOT | 281773970055SRussell King IRQF_TRIGGER_RISING | 281873970055SRussell King IRQF_TRIGGER_FALLING, 28195411ca71SChris Healy sfp_irq_name, sfp); 2820257c2559SRobert Hancock if (err) { 2821257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2822f3c9a666SRussell King sfp->need_poll = true; 282373970055SRussell King } 2824257c2559SRobert Hancock } 282573970055SRussell King 2826f3c9a666SRussell King if (sfp->need_poll) 282773970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 282873970055SRussell King 2829a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2830a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2831a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2832a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2833a1f5d1f0SAntoine Tenart */ 2834a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2835a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2836a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2837a1f5d1f0SAntoine Tenart 2838b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2839b5bfc21aSRussell King if (!sfp->sfp_bus) 2840b5bfc21aSRussell King return -ENOMEM; 2841b5bfc21aSRussell King 28429cc8976cSRussell King sfp_debugfs_init(sfp); 28439cc8976cSRussell King 284473970055SRussell King return 0; 284573970055SRussell King } 284673970055SRussell King 284773970055SRussell King static int sfp_remove(struct platform_device *pdev) 284873970055SRussell King { 284973970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 285073970055SRussell King 28519cc8976cSRussell King sfp_debugfs_exit(sfp); 285273970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 285373970055SRussell King 28540cb96b57SRussell King rtnl_lock(); 28550cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 28560cb96b57SRussell King rtnl_unlock(); 28570cb96b57SRussell King 285873970055SRussell King return 0; 285973970055SRussell King } 286073970055SRussell King 2861257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2862257c2559SRobert Hancock { 2863257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2864257c2559SRobert Hancock int i; 2865257c2559SRobert Hancock 2866257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2867257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2868257c2559SRobert Hancock continue; 2869257c2559SRobert Hancock 2870257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2871257c2559SRobert Hancock } 2872257c2559SRobert Hancock 2873257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2874257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2875257c2559SRobert Hancock } 2876257c2559SRobert Hancock 287773970055SRussell King static struct platform_driver sfp_driver = { 287873970055SRussell King .probe = sfp_probe, 287973970055SRussell King .remove = sfp_remove, 2880257c2559SRobert Hancock .shutdown = sfp_shutdown, 288173970055SRussell King .driver = { 288273970055SRussell King .name = "sfp", 288373970055SRussell King .of_match_table = sfp_of_match, 288473970055SRussell King }, 288573970055SRussell King }; 288673970055SRussell King 288773970055SRussell King static int sfp_init(void) 288873970055SRussell King { 288973970055SRussell King poll_jiffies = msecs_to_jiffies(100); 289073970055SRussell King 289173970055SRussell King return platform_driver_register(&sfp_driver); 289273970055SRussell King } 289373970055SRussell King module_init(sfp_init); 289473970055SRussell King 289573970055SRussell King static void sfp_exit(void) 289673970055SRussell King { 289773970055SRussell King platform_driver_unregister(&sfp_driver); 289873970055SRussell King } 289973970055SRussell King module_exit(sfp_exit); 290073970055SRussell King 290173970055SRussell King MODULE_ALIAS("platform:sfp"); 290273970055SRussell King MODULE_AUTHOR("Russell King"); 290373970055SRussell King MODULE_LICENSE("GPL v2"); 2904