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 213259c8618SRussell King struct sff_data { 214259c8618SRussell King unsigned int gpios; 215259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 216259c8618SRussell King }; 217259c8618SRussell King 21873970055SRussell King struct sfp { 21973970055SRussell King struct device *dev; 22073970055SRussell King struct i2c_adapter *i2c; 22173970055SRussell King struct mii_bus *i2c_mii; 22273970055SRussell King struct sfp_bus *sfp_bus; 223e85b1347SMarek Behún enum mdio_i2c_proto mdio_protocol; 22473970055SRussell King struct phy_device *mod_phy; 225259c8618SRussell King const struct sff_data *type; 2260d035bedSRussell King size_t i2c_block_size; 2273bb35261SJon Nettleton u32 max_power_mW; 22873970055SRussell King 22973970055SRussell King unsigned int (*get_state)(struct sfp *); 23073970055SRussell King void (*set_state)(struct sfp *, unsigned int); 23173970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2323bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 23373970055SRussell King 23473970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 235257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 23673970055SRussell King 237f3c9a666SRussell King bool need_poll; 238f3c9a666SRussell King 2392158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 2408475c4b7SRussell King (Oracle) unsigned int state_hw_mask; 241f3c9a666SRussell King unsigned int state_soft_mask; 24273970055SRussell King unsigned int state; 24373970055SRussell King struct delayed_work poll; 24473970055SRussell King struct delayed_work timeout; 2452158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 24673970055SRussell King unsigned char sm_mod_state; 247e117be74SRussell King unsigned char sm_mod_tries_init; 248e117be74SRussell King unsigned char sm_mod_tries; 24973970055SRussell King unsigned char sm_dev_state; 25073970055SRussell King unsigned short sm_state; 251281e4eabSRussell King unsigned char sm_fault_retries; 2521cb89a14SRussell King unsigned char sm_phy_retries; 25373970055SRussell King 25473970055SRussell King struct sfp_eeprom_id id; 255ed32abb1SRussell King unsigned int module_power_mW; 25626c97a2dSRussell King unsigned int module_t_start_up; 257324e88cbSMarek Behún unsigned int module_t_wait; 2582069624dSMatthew Hagan bool tx_fault_ignore; 259ed32abb1SRussell King 26023571c7bSRussell King (Oracle) const struct sfp_quirk *quirk; 26123571c7bSRussell King (Oracle) 2621323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2631323061aSAndrew Lunn struct sfp_diag diag; 264139d3a21SRussell King struct delayed_work hwmon_probe; 265139d3a21SRussell King unsigned int hwmon_tries; 2661323061aSAndrew Lunn struct device *hwmon_dev; 2671323061aSAndrew Lunn char *hwmon_name; 2681323061aSAndrew Lunn #endif 2691323061aSAndrew Lunn 2709cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2719cc8976cSRussell King struct dentry *debugfs_dir; 2729cc8976cSRussell King #endif 27373970055SRussell King }; 27473970055SRussell King 275259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 276259c8618SRussell King { 2770fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 278259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 279259c8618SRussell King } 280259c8618SRussell King 281259c8618SRussell King static const struct sff_data sff_data = { 282259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 283259c8618SRussell King .module_supported = sff_module_supported, 284259c8618SRussell King }; 285259c8618SRussell King 286259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 287259c8618SRussell King { 288f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 289f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 290f0b4f847SPali Rohár return true; 291f0b4f847SPali Rohár 292f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 293f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 294f0b4f847SPali Rohár * as supported based on vendor name and pn match. 295f0b4f847SPali Rohár */ 296f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 297f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 298f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 299f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 300f0b4f847SPali Rohár return true; 301f0b4f847SPali Rohár 302f0b4f847SPali Rohár return false; 303259c8618SRussell King } 304259c8618SRussell King 305259c8618SRussell King static const struct sff_data sfp_data = { 306259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 307259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 308259c8618SRussell King .module_supported = sfp_module_supported, 309259c8618SRussell King }; 310259c8618SRussell King 311259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 312259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 313259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 314259c8618SRussell King { }, 315259c8618SRussell King }; 316259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 317259c8618SRussell King 31827541675SRussell King (Oracle) static void sfp_fixup_long_startup(struct sfp *sfp) 31927541675SRussell King (Oracle) { 32027541675SRussell King (Oracle) sfp->module_t_start_up = T_START_UP_BAD_GPON; 32127541675SRussell King (Oracle) } 32227541675SRussell King (Oracle) 3235029be76SRussell King (Oracle) static void sfp_fixup_ignore_tx_fault(struct sfp *sfp) 3245029be76SRussell King (Oracle) { 3255029be76SRussell King (Oracle) sfp->tx_fault_ignore = true; 3265029be76SRussell King (Oracle) } 3275029be76SRussell King (Oracle) 32873472c83SRussell King (Oracle) static void sfp_fixup_halny_gsfp(struct sfp *sfp) 32973472c83SRussell King (Oracle) { 33073472c83SRussell King (Oracle) /* Ignore the TX_FAULT and LOS signals on this module. 33173472c83SRussell King (Oracle) * these are possibly used for other purposes on this 33273472c83SRussell King (Oracle) * module, e.g. a serial port. 33373472c83SRussell King (Oracle) */ 33473472c83SRussell King (Oracle) sfp->state_hw_mask &= ~(SFP_F_TX_FAULT | SFP_F_LOS); 33573472c83SRussell King (Oracle) } 33673472c83SRussell King (Oracle) 337324e88cbSMarek Behún static void sfp_fixup_rollball(struct sfp *sfp) 338324e88cbSMarek Behún { 339324e88cbSMarek Behún sfp->mdio_protocol = MDIO_I2C_ROLLBALL; 340324e88cbSMarek Behún sfp->module_t_wait = T_WAIT_ROLLBALL; 341324e88cbSMarek Behún } 342324e88cbSMarek Behún 343324e88cbSMarek Behún static void sfp_fixup_rollball_cc(struct sfp *sfp) 344324e88cbSMarek Behún { 345324e88cbSMarek Behún sfp_fixup_rollball(sfp); 346324e88cbSMarek Behún 347324e88cbSMarek Behún /* Some RollBall SFPs may have wrong (zero) extended compliance code 348324e88cbSMarek Behún * burned in EEPROM. For PHY probing we need the correct one. 349324e88cbSMarek Behún */ 350324e88cbSMarek Behún sfp->id.base.extended_cc = SFF8024_ECC_10GBASE_T_SFI; 351324e88cbSMarek Behún } 352324e88cbSMarek Behún 35323571c7bSRussell King (Oracle) static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id, 354fd580c98SRussell King unsigned long *modes, 355fd580c98SRussell King unsigned long *interfaces) 35623571c7bSRussell King (Oracle) { 35723571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, modes); 358fd580c98SRussell King __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 35923571c7bSRussell King (Oracle) } 36023571c7bSRussell King (Oracle) 36123571c7bSRussell King (Oracle) static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id, 362fd580c98SRussell King unsigned long *modes, 363fd580c98SRussell King unsigned long *interfaces) 36423571c7bSRussell King (Oracle) { 36523571c7bSRussell King (Oracle) /* Ubiquiti U-Fiber Instant module claims that support all transceiver 36623571c7bSRussell King (Oracle) * types including 10G Ethernet which is not truth. So clear all claimed 36723571c7bSRussell King (Oracle) * modes and set only one mode which module supports: 1000baseX_Full. 36823571c7bSRussell King (Oracle) */ 36923571c7bSRussell King (Oracle) linkmode_zero(modes); 37023571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, modes); 37123571c7bSRussell King (Oracle) } 37223571c7bSRussell King (Oracle) 37313c8adcfSMarek Behún #define SFP_QUIRK(_v, _p, _m, _f) \ 37413c8adcfSMarek Behún { .vendor = _v, .part = _p, .modes = _m, .fixup = _f, } 37513c8adcfSMarek Behún #define SFP_QUIRK_M(_v, _p, _m) SFP_QUIRK(_v, _p, _m, NULL) 37613c8adcfSMarek Behún #define SFP_QUIRK_F(_v, _p, _f) SFP_QUIRK(_v, _p, NULL, _f) 37713c8adcfSMarek Behún 37823571c7bSRussell King (Oracle) static const struct sfp_quirk sfp_quirks[] = { 37913c8adcfSMarek Behún // Alcatel Lucent G-010S-P can operate at 2500base-X, but incorrectly 38013c8adcfSMarek Behún // report 2500MBd NRZ in their EEPROM 38113c8adcfSMarek Behún SFP_QUIRK_M("ALCATELLUCENT", "G010SP", sfp_quirk_2500basex), 38213c8adcfSMarek Behún 38313c8adcfSMarek Behún // Alcatel Lucent G-010S-A can operate at 2500base-X, but report 3.2GBd 38423571c7bSRussell King (Oracle) // NRZ in their EEPROM 38513c8adcfSMarek Behún SFP_QUIRK("ALCATELLUCENT", "3FE46541AA", sfp_quirk_2500basex, 38613c8adcfSMarek Behún sfp_fixup_long_startup), 38713c8adcfSMarek Behún 38813c8adcfSMarek Behún SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp), 38913c8adcfSMarek Behún 39013c8adcfSMarek Behún // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in 39113c8adcfSMarek Behún // their EEPROM 39213c8adcfSMarek Behún SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex, 39313c8adcfSMarek Behún sfp_fixup_ignore_tx_fault), 39413c8adcfSMarek Behún 39513c8adcfSMarek Behún // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report 39613c8adcfSMarek Behún // 2500MBd NRZ in their EEPROM 39713c8adcfSMarek Behún SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex), 39813c8adcfSMarek Behún 39913c8adcfSMarek Behún SFP_QUIRK_M("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant), 400324e88cbSMarek Behún 401324e88cbSMarek Behún SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc), 402324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc), 403324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc), 404324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), 405324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), 40623571c7bSRussell King (Oracle) }; 40723571c7bSRussell King (Oracle) 40823571c7bSRussell King (Oracle) static size_t sfp_strlen(const char *str, size_t maxlen) 40923571c7bSRussell King (Oracle) { 41023571c7bSRussell King (Oracle) size_t size, i; 41123571c7bSRussell King (Oracle) 41273472c83SRussell King (Oracle) /* Trailing characters should be filled with space chars, but 41373472c83SRussell King (Oracle) * some manufacturers can't read SFF-8472 and use NUL. 41473472c83SRussell King (Oracle) */ 41523571c7bSRussell King (Oracle) for (i = 0, size = 0; i < maxlen; i++) 41673472c83SRussell King (Oracle) if (str[i] != ' ' && str[i] != '\0') 41723571c7bSRussell King (Oracle) size = i + 1; 41823571c7bSRussell King (Oracle) 41923571c7bSRussell King (Oracle) return size; 42023571c7bSRussell King (Oracle) } 42123571c7bSRussell King (Oracle) 42223571c7bSRussell King (Oracle) static bool sfp_match(const char *qs, const char *str, size_t len) 42323571c7bSRussell King (Oracle) { 42423571c7bSRussell King (Oracle) if (!qs) 42523571c7bSRussell King (Oracle) return true; 42623571c7bSRussell King (Oracle) if (strlen(qs) != len) 42723571c7bSRussell King (Oracle) return false; 42823571c7bSRussell King (Oracle) return !strncmp(qs, str, len); 42923571c7bSRussell King (Oracle) } 43023571c7bSRussell King (Oracle) 43123571c7bSRussell King (Oracle) static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) 43223571c7bSRussell King (Oracle) { 43323571c7bSRussell King (Oracle) const struct sfp_quirk *q; 43423571c7bSRussell King (Oracle) unsigned int i; 43523571c7bSRussell King (Oracle) size_t vs, ps; 43623571c7bSRussell King (Oracle) 43723571c7bSRussell King (Oracle) vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); 43823571c7bSRussell King (Oracle) ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); 43923571c7bSRussell King (Oracle) 44023571c7bSRussell King (Oracle) for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) 44123571c7bSRussell King (Oracle) if (sfp_match(q->vendor, id->base.vendor_name, vs) && 44223571c7bSRussell King (Oracle) sfp_match(q->part, id->base.vendor_pn, ps)) 44323571c7bSRussell King (Oracle) return q; 44423571c7bSRussell King (Oracle) 44523571c7bSRussell King (Oracle) return NULL; 44623571c7bSRussell King (Oracle) } 44723571c7bSRussell King (Oracle) 44873970055SRussell King static unsigned long poll_jiffies; 44973970055SRussell King 45073970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 45173970055SRussell King { 45273970055SRussell King unsigned int i, state, v; 45373970055SRussell King 45473970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 45573970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 45673970055SRussell King continue; 45773970055SRussell King 45873970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 45973970055SRussell King if (v) 46073970055SRussell King state |= BIT(i); 46173970055SRussell King } 46273970055SRussell King 46373970055SRussell King return state; 46473970055SRussell King } 46573970055SRussell King 466259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 467259c8618SRussell King { 468259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 469259c8618SRussell King } 470259c8618SRussell King 47173970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 47273970055SRussell King { 47373970055SRussell King if (state & SFP_F_PRESENT) { 47473970055SRussell King /* If the module is present, drive the signals */ 47573970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 47673970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 47773970055SRussell King state & SFP_F_TX_DISABLE); 47873970055SRussell King if (state & SFP_F_RATE_SELECT) 47973970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 48073970055SRussell King state & SFP_F_RATE_SELECT); 48173970055SRussell King } else { 48273970055SRussell King /* Otherwise, let them float to the pull-ups */ 48373970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 48473970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 48573970055SRussell King if (state & SFP_F_RATE_SELECT) 48673970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 48773970055SRussell King } 48873970055SRussell King } 48973970055SRussell King 4903bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 4913bb35261SJon Nettleton size_t len) 49273970055SRussell King { 49373970055SRussell King struct i2c_msg msgs[2]; 494426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 495426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 49628e74a7cSRussell King size_t this_len; 49773970055SRussell King int ret; 49873970055SRussell King 49973970055SRussell King msgs[0].addr = bus_addr; 50073970055SRussell King msgs[0].flags = 0; 50173970055SRussell King msgs[0].len = 1; 50273970055SRussell King msgs[0].buf = &dev_addr; 50373970055SRussell King msgs[1].addr = bus_addr; 50473970055SRussell King msgs[1].flags = I2C_M_RD; 50573970055SRussell King msgs[1].len = len; 50673970055SRussell King msgs[1].buf = buf; 50773970055SRussell King 50828e74a7cSRussell King while (len) { 50928e74a7cSRussell King this_len = len; 5100d035bedSRussell King if (this_len > block_size) 5110d035bedSRussell King this_len = block_size; 51228e74a7cSRussell King 51328e74a7cSRussell King msgs[1].len = this_len; 51428e74a7cSRussell King 5153bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 51673970055SRussell King if (ret < 0) 51773970055SRussell King return ret; 51873970055SRussell King 51928e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 52028e74a7cSRussell King break; 52128e74a7cSRussell King 52228e74a7cSRussell King msgs[1].buf += this_len; 52328e74a7cSRussell King dev_addr += this_len; 52428e74a7cSRussell King len -= this_len; 52528e74a7cSRussell King } 52628e74a7cSRussell King 52728e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 52873970055SRussell King } 52973970055SRussell King 5303bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 53173970055SRussell King size_t len) 53273970055SRussell King { 5333bb35261SJon Nettleton struct i2c_msg msgs[1]; 5343bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 5353bb35261SJon Nettleton int ret; 5363bb35261SJon Nettleton 5373bb35261SJon Nettleton msgs[0].addr = bus_addr; 5383bb35261SJon Nettleton msgs[0].flags = 0; 5393bb35261SJon Nettleton msgs[0].len = 1 + len; 5403bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 5413bb35261SJon Nettleton if (!msgs[0].buf) 5423bb35261SJon Nettleton return -ENOMEM; 5433bb35261SJon Nettleton 5443bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 5453bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 5463bb35261SJon Nettleton 5473bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 5483bb35261SJon Nettleton 5493bb35261SJon Nettleton kfree(msgs[0].buf); 5503bb35261SJon Nettleton 5513bb35261SJon Nettleton if (ret < 0) 5523bb35261SJon Nettleton return ret; 5533bb35261SJon Nettleton 5543bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 55573970055SRussell King } 55673970055SRussell King 55773970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 55873970055SRussell King { 55973970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 56073970055SRussell King return -EINVAL; 56173970055SRussell King 56273970055SRussell King sfp->i2c = i2c; 56373970055SRussell King sfp->read = sfp_i2c_read; 5643bb35261SJon Nettleton sfp->write = sfp_i2c_write; 56573970055SRussell King 566e85b1347SMarek Behún return 0; 567e85b1347SMarek Behún } 568e85b1347SMarek Behún 569e85b1347SMarek Behún static int sfp_i2c_mdiobus_create(struct sfp *sfp) 570e85b1347SMarek Behún { 571e85b1347SMarek Behún struct mii_bus *i2c_mii; 572e85b1347SMarek Behún int ret; 573e85b1347SMarek Behún 57409bbedacSMarek Behún i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, sfp->mdio_protocol); 57573970055SRussell King if (IS_ERR(i2c_mii)) 57673970055SRussell King return PTR_ERR(i2c_mii); 57773970055SRussell King 57873970055SRussell King i2c_mii->name = "SFP I2C Bus"; 57973970055SRussell King i2c_mii->phy_mask = ~0; 58073970055SRussell King 58173970055SRussell King ret = mdiobus_register(i2c_mii); 58273970055SRussell King if (ret < 0) { 58373970055SRussell King mdiobus_free(i2c_mii); 58473970055SRussell King return ret; 58573970055SRussell King } 58673970055SRussell King 58773970055SRussell King sfp->i2c_mii = i2c_mii; 58873970055SRussell King 58973970055SRussell King return 0; 59073970055SRussell King } 59173970055SRussell King 592e85b1347SMarek Behún static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) 593e85b1347SMarek Behún { 594e85b1347SMarek Behún mdiobus_unregister(sfp->i2c_mii); 595e85b1347SMarek Behún sfp->i2c_mii = NULL; 596e85b1347SMarek Behún } 597e85b1347SMarek Behún 59873970055SRussell King /* Interface */ 59973970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 60073970055SRussell King { 60173970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 60273970055SRussell King } 60373970055SRussell King 6043bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 6053bb35261SJon Nettleton { 6063bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 6073bb35261SJon Nettleton } 6083bb35261SJon Nettleton 609a3c536fcSRussell King (Oracle) static int sfp_modify_u8(struct sfp *sfp, bool a2, u8 addr, u8 mask, u8 val) 610a3c536fcSRussell King (Oracle) { 611a3c536fcSRussell King (Oracle) int ret; 612a3c536fcSRussell King (Oracle) u8 old, v; 613a3c536fcSRussell King (Oracle) 614a3c536fcSRussell King (Oracle) ret = sfp_read(sfp, a2, addr, &old, sizeof(old)); 615a3c536fcSRussell King (Oracle) if (ret != sizeof(old)) 616a3c536fcSRussell King (Oracle) return ret; 617a3c536fcSRussell King (Oracle) 618a3c536fcSRussell King (Oracle) v = (old & ~mask) | (val & mask); 619a3c536fcSRussell King (Oracle) if (v == old) 620a3c536fcSRussell King (Oracle) return sizeof(v); 621a3c536fcSRussell King (Oracle) 622a3c536fcSRussell King (Oracle) return sfp_write(sfp, a2, addr, &v, sizeof(v)); 623a3c536fcSRussell King (Oracle) } 624a3c536fcSRussell King (Oracle) 625f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 626f3c9a666SRussell King { 627f3c9a666SRussell King unsigned int state = 0; 628f3c9a666SRussell King u8 status; 6290dea4d03SRussell King int ret; 630f3c9a666SRussell King 6310dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 6320dea4d03SRussell King if (ret == sizeof(status)) { 633f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 634f3c9a666SRussell King state |= SFP_F_LOS; 635f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 636f3c9a666SRussell King state |= SFP_F_TX_FAULT; 6370dea4d03SRussell King } else { 6380dea4d03SRussell King dev_err_ratelimited(sfp->dev, 6399ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 6409ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 6410dea4d03SRussell King /* Preserve the current state */ 6420dea4d03SRussell King state = sfp->state; 643f3c9a666SRussell King } 644f3c9a666SRussell King 645f3c9a666SRussell King return state & sfp->state_soft_mask; 646f3c9a666SRussell King } 647f3c9a666SRussell King 648f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 649f3c9a666SRussell King { 650a3c536fcSRussell King (Oracle) u8 mask = SFP_STATUS_TX_DISABLE_FORCE; 651a3c536fcSRussell King (Oracle) u8 val = 0; 652f3c9a666SRussell King 653f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 654a3c536fcSRussell King (Oracle) val |= SFP_STATUS_TX_DISABLE_FORCE; 655f3c9a666SRussell King 656a3c536fcSRussell King (Oracle) 657a3c536fcSRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); 658f3c9a666SRussell King } 659f3c9a666SRussell King 660f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 661f3c9a666SRussell King { 662f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 6638475c4b7SRussell King (Oracle) unsigned int mask = 0; 664f3c9a666SRussell King 665f3c9a666SRussell King sfp->state_soft_mask = 0; 6668475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 6678475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 6688475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 6698475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 6708475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 6718475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 6728475c4b7SRussell King (Oracle) 6738475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 6748475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 675f3c9a666SRussell King 676f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 677f3c9a666SRussell King !sfp->need_poll) 678f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 679f3c9a666SRussell King } 680f3c9a666SRussell King 681f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 682f3c9a666SRussell King { 683f3c9a666SRussell King sfp->state_soft_mask = 0; 684f3c9a666SRussell King } 685f3c9a666SRussell King 686f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 687f3c9a666SRussell King { 6888475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 6898475c4b7SRussell King (Oracle) unsigned int state; 690f3c9a666SRussell King 6918475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 6928475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 693f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 694f3c9a666SRussell King 695f3c9a666SRussell King return state; 696f3c9a666SRussell King } 697f3c9a666SRussell King 698f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 699f3c9a666SRussell King { 700f3c9a666SRussell King sfp->set_state(sfp, state); 701f3c9a666SRussell King 702f3c9a666SRussell King if (state & SFP_F_PRESENT && 703f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 704f3c9a666SRussell King sfp_soft_set_state(sfp, state); 705f3c9a666SRussell King } 706f3c9a666SRussell King 70773970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 70873970055SRussell King { 70973970055SRussell King u8 *p, check; 71073970055SRussell King 71173970055SRussell King for (p = buf, check = 0; len; p++, len--) 71273970055SRussell King check += *p; 71373970055SRussell King 71473970055SRussell King return check; 71573970055SRussell King } 71673970055SRussell King 7171323061aSAndrew Lunn /* hwmon */ 7181323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 7191323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 7201323061aSAndrew Lunn enum hwmon_sensor_types type, 7211323061aSAndrew Lunn u32 attr, int channel) 7221323061aSAndrew Lunn { 7231323061aSAndrew Lunn const struct sfp *sfp = data; 7241323061aSAndrew Lunn 7251323061aSAndrew Lunn switch (type) { 7261323061aSAndrew Lunn case hwmon_temp: 7271323061aSAndrew Lunn switch (attr) { 7281323061aSAndrew Lunn case hwmon_temp_min_alarm: 7291323061aSAndrew Lunn case hwmon_temp_max_alarm: 7301323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7311323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7321323061aSAndrew Lunn case hwmon_temp_min: 7331323061aSAndrew Lunn case hwmon_temp_max: 7341323061aSAndrew Lunn case hwmon_temp_lcrit: 7351323061aSAndrew Lunn case hwmon_temp_crit: 736a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 737a33710bdSAndrew Lunn return 0; 738df561f66SGustavo A. R. Silva fallthrough; 739a33710bdSAndrew Lunn case hwmon_temp_input: 740c1236979SAndrew Lunn case hwmon_temp_label: 7411323061aSAndrew Lunn return 0444; 7421323061aSAndrew Lunn default: 7431323061aSAndrew Lunn return 0; 7441323061aSAndrew Lunn } 7451323061aSAndrew Lunn case hwmon_in: 7461323061aSAndrew Lunn switch (attr) { 7471323061aSAndrew Lunn case hwmon_in_min_alarm: 7481323061aSAndrew Lunn case hwmon_in_max_alarm: 7491323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7501323061aSAndrew Lunn case hwmon_in_crit_alarm: 7511323061aSAndrew Lunn case hwmon_in_min: 7521323061aSAndrew Lunn case hwmon_in_max: 7531323061aSAndrew Lunn case hwmon_in_lcrit: 7541323061aSAndrew Lunn case hwmon_in_crit: 755a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 756a33710bdSAndrew Lunn return 0; 757df561f66SGustavo A. R. Silva fallthrough; 758a33710bdSAndrew Lunn case hwmon_in_input: 759c1236979SAndrew Lunn case hwmon_in_label: 7601323061aSAndrew Lunn return 0444; 7611323061aSAndrew Lunn default: 7621323061aSAndrew Lunn return 0; 7631323061aSAndrew Lunn } 7641323061aSAndrew Lunn case hwmon_curr: 7651323061aSAndrew Lunn switch (attr) { 7661323061aSAndrew Lunn case hwmon_curr_min_alarm: 7671323061aSAndrew Lunn case hwmon_curr_max_alarm: 7681323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 7691323061aSAndrew Lunn case hwmon_curr_crit_alarm: 7701323061aSAndrew Lunn case hwmon_curr_min: 7711323061aSAndrew Lunn case hwmon_curr_max: 7721323061aSAndrew Lunn case hwmon_curr_lcrit: 7731323061aSAndrew Lunn case hwmon_curr_crit: 774a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 775a33710bdSAndrew Lunn return 0; 776df561f66SGustavo A. R. Silva fallthrough; 777a33710bdSAndrew Lunn case hwmon_curr_input: 778c1236979SAndrew Lunn case hwmon_curr_label: 7791323061aSAndrew Lunn return 0444; 7801323061aSAndrew Lunn default: 7811323061aSAndrew Lunn return 0; 7821323061aSAndrew Lunn } 7831323061aSAndrew Lunn case hwmon_power: 7841323061aSAndrew Lunn /* External calibration of receive power requires 7851323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 7861323061aSAndrew Lunn * is not easy, so just skip it. If the module does 7871323061aSAndrew Lunn * not require external calibration, we can however 7881323061aSAndrew Lunn * show receiver power, since FP is then not needed. 7891323061aSAndrew Lunn */ 7901323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 7911323061aSAndrew Lunn channel == 1) 7921323061aSAndrew Lunn return 0; 7931323061aSAndrew Lunn switch (attr) { 7941323061aSAndrew Lunn case hwmon_power_min_alarm: 7951323061aSAndrew Lunn case hwmon_power_max_alarm: 7961323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 7971323061aSAndrew Lunn case hwmon_power_crit_alarm: 7981323061aSAndrew Lunn case hwmon_power_min: 7991323061aSAndrew Lunn case hwmon_power_max: 8001323061aSAndrew Lunn case hwmon_power_lcrit: 8011323061aSAndrew Lunn case hwmon_power_crit: 802a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 803a33710bdSAndrew Lunn return 0; 804df561f66SGustavo A. R. Silva fallthrough; 805a33710bdSAndrew Lunn case hwmon_power_input: 806c1236979SAndrew Lunn case hwmon_power_label: 8071323061aSAndrew Lunn return 0444; 8081323061aSAndrew Lunn default: 8091323061aSAndrew Lunn return 0; 8101323061aSAndrew Lunn } 8111323061aSAndrew Lunn default: 8121323061aSAndrew Lunn return 0; 8131323061aSAndrew Lunn } 8141323061aSAndrew Lunn } 8151323061aSAndrew Lunn 8161323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 8171323061aSAndrew Lunn { 8181323061aSAndrew Lunn __be16 val; 8191323061aSAndrew Lunn int err; 8201323061aSAndrew Lunn 8211323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 8221323061aSAndrew Lunn if (err < 0) 8231323061aSAndrew Lunn return err; 8241323061aSAndrew Lunn 8251323061aSAndrew Lunn *value = be16_to_cpu(val); 8261323061aSAndrew Lunn 8271323061aSAndrew Lunn return 0; 8281323061aSAndrew Lunn } 8291323061aSAndrew Lunn 8301323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 8311323061aSAndrew Lunn { 8320cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8331323061aSAndrew Lunn } 8341323061aSAndrew Lunn 8351323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 8361323061aSAndrew Lunn long *value) 8371323061aSAndrew Lunn { 8381323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 8391323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 8401323061aSAndrew Lunn } 8411323061aSAndrew Lunn 8421323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 8431323061aSAndrew Lunn { 8441323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 8451323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 8461323061aSAndrew Lunn 8471323061aSAndrew Lunn if (*value >= 0x8000) 8481323061aSAndrew Lunn *value -= 0x10000; 8491323061aSAndrew Lunn 8501323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 8511323061aSAndrew Lunn } 8521323061aSAndrew Lunn 8531323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 8541323061aSAndrew Lunn { 8551323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 8561323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 8571323061aSAndrew Lunn 8581323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8591323061aSAndrew Lunn } 8601323061aSAndrew Lunn 8611323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 8621323061aSAndrew Lunn { 8631323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 8641323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 8651323061aSAndrew Lunn 8661323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 8671323061aSAndrew Lunn } 8681323061aSAndrew Lunn 8691323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 8701323061aSAndrew Lunn { 8711323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 8721323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 8731323061aSAndrew Lunn 8741323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8751323061aSAndrew Lunn } 8761323061aSAndrew Lunn 8771323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 8781323061aSAndrew Lunn { 8791323061aSAndrew Lunn int err; 8801323061aSAndrew Lunn 8811323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 8821323061aSAndrew Lunn if (err < 0) 8831323061aSAndrew Lunn return err; 8841323061aSAndrew Lunn 8851323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8861323061aSAndrew Lunn 8871323061aSAndrew Lunn return 0; 8881323061aSAndrew Lunn } 8891323061aSAndrew Lunn 8901323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 8911323061aSAndrew Lunn { 8921323061aSAndrew Lunn int err; 8931323061aSAndrew Lunn 8941323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 8951323061aSAndrew Lunn if (err < 0) 8961323061aSAndrew Lunn return err; 8971323061aSAndrew Lunn 8981323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8991323061aSAndrew Lunn 9001323061aSAndrew Lunn return 0; 9011323061aSAndrew Lunn } 9021323061aSAndrew Lunn 9031323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 9041323061aSAndrew Lunn { 9051323061aSAndrew Lunn int err; 9061323061aSAndrew Lunn 9071323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9081323061aSAndrew Lunn if (err < 0) 9091323061aSAndrew Lunn return err; 9101323061aSAndrew Lunn 9111323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn return 0; 9141323061aSAndrew Lunn } 9151323061aSAndrew Lunn 9161323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 9171323061aSAndrew Lunn { 9181323061aSAndrew Lunn int err; 9191323061aSAndrew Lunn 9201323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9211323061aSAndrew Lunn if (err < 0) 9221323061aSAndrew Lunn return err; 9231323061aSAndrew Lunn 9241323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn return 0; 9271323061aSAndrew Lunn } 9281323061aSAndrew Lunn 9291323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 9301323061aSAndrew Lunn { 9311323061aSAndrew Lunn int err; 9321323061aSAndrew Lunn 9331323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9341323061aSAndrew Lunn if (err < 0) 9351323061aSAndrew Lunn return err; 9361323061aSAndrew Lunn 9371323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn return 0; 9401323061aSAndrew Lunn } 9411323061aSAndrew Lunn 9421323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 9431323061aSAndrew Lunn { 9441323061aSAndrew Lunn u8 status; 9451323061aSAndrew Lunn int err; 9461323061aSAndrew Lunn 9471323061aSAndrew Lunn switch (attr) { 9481323061aSAndrew Lunn case hwmon_temp_input: 9491323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 9501323061aSAndrew Lunn 9511323061aSAndrew Lunn case hwmon_temp_lcrit: 9521323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 9531323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9541323061aSAndrew Lunn return 0; 9551323061aSAndrew Lunn 9561323061aSAndrew Lunn case hwmon_temp_min: 9571323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 9581323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9591323061aSAndrew Lunn return 0; 9601323061aSAndrew Lunn case hwmon_temp_max: 9611323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 9621323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9631323061aSAndrew Lunn return 0; 9641323061aSAndrew Lunn 9651323061aSAndrew Lunn case hwmon_temp_crit: 9661323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 9671323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9681323061aSAndrew Lunn return 0; 9691323061aSAndrew Lunn 9701323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 9711323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9721323061aSAndrew Lunn if (err < 0) 9731323061aSAndrew Lunn return err; 9741323061aSAndrew Lunn 9751323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 9761323061aSAndrew Lunn return 0; 9771323061aSAndrew Lunn 9781323061aSAndrew Lunn case hwmon_temp_min_alarm: 9791323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9801323061aSAndrew Lunn if (err < 0) 9811323061aSAndrew Lunn return err; 9821323061aSAndrew Lunn 9831323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 9841323061aSAndrew Lunn return 0; 9851323061aSAndrew Lunn 9861323061aSAndrew Lunn case hwmon_temp_max_alarm: 9871323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9881323061aSAndrew Lunn if (err < 0) 9891323061aSAndrew Lunn return err; 9901323061aSAndrew Lunn 9911323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 9921323061aSAndrew Lunn return 0; 9931323061aSAndrew Lunn 9941323061aSAndrew Lunn case hwmon_temp_crit_alarm: 9951323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9961323061aSAndrew Lunn if (err < 0) 9971323061aSAndrew Lunn return err; 9981323061aSAndrew Lunn 9991323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 10001323061aSAndrew Lunn return 0; 10011323061aSAndrew Lunn default: 10021323061aSAndrew Lunn return -EOPNOTSUPP; 10031323061aSAndrew Lunn } 10041323061aSAndrew Lunn 10051323061aSAndrew Lunn return -EOPNOTSUPP; 10061323061aSAndrew Lunn } 10071323061aSAndrew Lunn 10081323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 10091323061aSAndrew Lunn { 10101323061aSAndrew Lunn u8 status; 10111323061aSAndrew Lunn int err; 10121323061aSAndrew Lunn 10131323061aSAndrew Lunn switch (attr) { 10141323061aSAndrew Lunn case hwmon_in_input: 10151323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 10161323061aSAndrew Lunn 10171323061aSAndrew Lunn case hwmon_in_lcrit: 10181323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 10191323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10201323061aSAndrew Lunn return 0; 10211323061aSAndrew Lunn 10221323061aSAndrew Lunn case hwmon_in_min: 10231323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 10241323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10251323061aSAndrew Lunn return 0; 10261323061aSAndrew Lunn 10271323061aSAndrew Lunn case hwmon_in_max: 10281323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 10291323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10301323061aSAndrew Lunn return 0; 10311323061aSAndrew Lunn 10321323061aSAndrew Lunn case hwmon_in_crit: 10331323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 10341323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10351323061aSAndrew Lunn return 0; 10361323061aSAndrew Lunn 10371323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 10381323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10391323061aSAndrew Lunn if (err < 0) 10401323061aSAndrew Lunn return err; 10411323061aSAndrew Lunn 10421323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 10431323061aSAndrew Lunn return 0; 10441323061aSAndrew Lunn 10451323061aSAndrew Lunn case hwmon_in_min_alarm: 10461323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10471323061aSAndrew Lunn if (err < 0) 10481323061aSAndrew Lunn return err; 10491323061aSAndrew Lunn 10501323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 10511323061aSAndrew Lunn return 0; 10521323061aSAndrew Lunn 10531323061aSAndrew Lunn case hwmon_in_max_alarm: 10541323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10551323061aSAndrew Lunn if (err < 0) 10561323061aSAndrew Lunn return err; 10571323061aSAndrew Lunn 10581323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 10591323061aSAndrew Lunn return 0; 10601323061aSAndrew Lunn 10611323061aSAndrew Lunn case hwmon_in_crit_alarm: 10621323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10631323061aSAndrew Lunn if (err < 0) 10641323061aSAndrew Lunn return err; 10651323061aSAndrew Lunn 10661323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 10671323061aSAndrew Lunn return 0; 10681323061aSAndrew Lunn default: 10691323061aSAndrew Lunn return -EOPNOTSUPP; 10701323061aSAndrew Lunn } 10711323061aSAndrew Lunn 10721323061aSAndrew Lunn return -EOPNOTSUPP; 10731323061aSAndrew Lunn } 10741323061aSAndrew Lunn 10751323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 10761323061aSAndrew Lunn { 10771323061aSAndrew Lunn u8 status; 10781323061aSAndrew Lunn int err; 10791323061aSAndrew Lunn 10801323061aSAndrew Lunn switch (attr) { 10811323061aSAndrew Lunn case hwmon_curr_input: 10821323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 10831323061aSAndrew Lunn 10841323061aSAndrew Lunn case hwmon_curr_lcrit: 10851323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 10861323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10871323061aSAndrew Lunn return 0; 10881323061aSAndrew Lunn 10891323061aSAndrew Lunn case hwmon_curr_min: 10901323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 10911323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10921323061aSAndrew Lunn return 0; 10931323061aSAndrew Lunn 10941323061aSAndrew Lunn case hwmon_curr_max: 10951323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 10961323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 10971323061aSAndrew Lunn return 0; 10981323061aSAndrew Lunn 10991323061aSAndrew Lunn case hwmon_curr_crit: 11001323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 11011323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11021323061aSAndrew Lunn return 0; 11031323061aSAndrew Lunn 11041323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 11051323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11061323061aSAndrew Lunn if (err < 0) 11071323061aSAndrew Lunn return err; 11081323061aSAndrew Lunn 11091323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 11101323061aSAndrew Lunn return 0; 11111323061aSAndrew Lunn 11121323061aSAndrew Lunn case hwmon_curr_min_alarm: 11131323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11141323061aSAndrew Lunn if (err < 0) 11151323061aSAndrew Lunn return err; 11161323061aSAndrew Lunn 11171323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 11181323061aSAndrew Lunn return 0; 11191323061aSAndrew Lunn 11201323061aSAndrew Lunn case hwmon_curr_max_alarm: 11211323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11221323061aSAndrew Lunn if (err < 0) 11231323061aSAndrew Lunn return err; 11241323061aSAndrew Lunn 11251323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 11261323061aSAndrew Lunn return 0; 11271323061aSAndrew Lunn 11281323061aSAndrew Lunn case hwmon_curr_crit_alarm: 11291323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11301323061aSAndrew Lunn if (err < 0) 11311323061aSAndrew Lunn return err; 11321323061aSAndrew Lunn 11331323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 11341323061aSAndrew Lunn return 0; 11351323061aSAndrew Lunn default: 11361323061aSAndrew Lunn return -EOPNOTSUPP; 11371323061aSAndrew Lunn } 11381323061aSAndrew Lunn 11391323061aSAndrew Lunn return -EOPNOTSUPP; 11401323061aSAndrew Lunn } 11411323061aSAndrew Lunn 11421323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 11431323061aSAndrew Lunn { 11441323061aSAndrew Lunn u8 status; 11451323061aSAndrew Lunn int err; 11461323061aSAndrew Lunn 11471323061aSAndrew Lunn switch (attr) { 11481323061aSAndrew Lunn case hwmon_power_input: 11491323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 11501323061aSAndrew Lunn 11511323061aSAndrew Lunn case hwmon_power_lcrit: 11521323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 11531323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11541323061aSAndrew Lunn return 0; 11551323061aSAndrew Lunn 11561323061aSAndrew Lunn case hwmon_power_min: 11571323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 11581323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11591323061aSAndrew Lunn return 0; 11601323061aSAndrew Lunn 11611323061aSAndrew Lunn case hwmon_power_max: 11621323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 11631323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11641323061aSAndrew Lunn return 0; 11651323061aSAndrew Lunn 11661323061aSAndrew Lunn case hwmon_power_crit: 11671323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 11681323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 11691323061aSAndrew Lunn return 0; 11701323061aSAndrew Lunn 11711323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 11721323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11731323061aSAndrew Lunn if (err < 0) 11741323061aSAndrew Lunn return err; 11751323061aSAndrew Lunn 11761323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 11771323061aSAndrew Lunn return 0; 11781323061aSAndrew Lunn 11791323061aSAndrew Lunn case hwmon_power_min_alarm: 11801323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11811323061aSAndrew Lunn if (err < 0) 11821323061aSAndrew Lunn return err; 11831323061aSAndrew Lunn 11841323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 11851323061aSAndrew Lunn return 0; 11861323061aSAndrew Lunn 11871323061aSAndrew Lunn case hwmon_power_max_alarm: 11881323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11891323061aSAndrew Lunn if (err < 0) 11901323061aSAndrew Lunn return err; 11911323061aSAndrew Lunn 11921323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 11931323061aSAndrew Lunn return 0; 11941323061aSAndrew Lunn 11951323061aSAndrew Lunn case hwmon_power_crit_alarm: 11961323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11971323061aSAndrew Lunn if (err < 0) 11981323061aSAndrew Lunn return err; 11991323061aSAndrew Lunn 12001323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 12011323061aSAndrew Lunn return 0; 12021323061aSAndrew Lunn default: 12031323061aSAndrew Lunn return -EOPNOTSUPP; 12041323061aSAndrew Lunn } 12051323061aSAndrew Lunn 12061323061aSAndrew Lunn return -EOPNOTSUPP; 12071323061aSAndrew Lunn } 12081323061aSAndrew Lunn 12091323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 12101323061aSAndrew Lunn { 12111323061aSAndrew Lunn u8 status; 12121323061aSAndrew Lunn int err; 12131323061aSAndrew Lunn 12141323061aSAndrew Lunn switch (attr) { 12151323061aSAndrew Lunn case hwmon_power_input: 12161323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 12171323061aSAndrew Lunn 12181323061aSAndrew Lunn case hwmon_power_lcrit: 12191323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 12201323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12211323061aSAndrew Lunn return 0; 12221323061aSAndrew Lunn 12231323061aSAndrew Lunn case hwmon_power_min: 12241323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 12251323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12261323061aSAndrew Lunn return 0; 12271323061aSAndrew Lunn 12281323061aSAndrew Lunn case hwmon_power_max: 12291323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 12301323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12311323061aSAndrew Lunn return 0; 12321323061aSAndrew Lunn 12331323061aSAndrew Lunn case hwmon_power_crit: 12341323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 12351323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12361323061aSAndrew Lunn return 0; 12371323061aSAndrew Lunn 12381323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12391323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12401323061aSAndrew Lunn if (err < 0) 12411323061aSAndrew Lunn return err; 12421323061aSAndrew Lunn 12431323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 12441323061aSAndrew Lunn return 0; 12451323061aSAndrew Lunn 12461323061aSAndrew Lunn case hwmon_power_min_alarm: 12471323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12481323061aSAndrew Lunn if (err < 0) 12491323061aSAndrew Lunn return err; 12501323061aSAndrew Lunn 12511323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 12521323061aSAndrew Lunn return 0; 12531323061aSAndrew Lunn 12541323061aSAndrew Lunn case hwmon_power_max_alarm: 12551323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 12561323061aSAndrew Lunn if (err < 0) 12571323061aSAndrew Lunn return err; 12581323061aSAndrew Lunn 12591323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 12601323061aSAndrew Lunn return 0; 12611323061aSAndrew Lunn 12621323061aSAndrew Lunn case hwmon_power_crit_alarm: 12631323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12641323061aSAndrew Lunn if (err < 0) 12651323061aSAndrew Lunn return err; 12661323061aSAndrew Lunn 12671323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 12681323061aSAndrew Lunn return 0; 12691323061aSAndrew Lunn default: 12701323061aSAndrew Lunn return -EOPNOTSUPP; 12711323061aSAndrew Lunn } 12721323061aSAndrew Lunn 12731323061aSAndrew Lunn return -EOPNOTSUPP; 12741323061aSAndrew Lunn } 12751323061aSAndrew Lunn 12761323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 12771323061aSAndrew Lunn u32 attr, int channel, long *value) 12781323061aSAndrew Lunn { 12791323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 12801323061aSAndrew Lunn 12811323061aSAndrew Lunn switch (type) { 12821323061aSAndrew Lunn case hwmon_temp: 12831323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 12841323061aSAndrew Lunn case hwmon_in: 12851323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 12861323061aSAndrew Lunn case hwmon_curr: 12871323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 12881323061aSAndrew Lunn case hwmon_power: 12891323061aSAndrew Lunn switch (channel) { 12901323061aSAndrew Lunn case 0: 12911323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 12921323061aSAndrew Lunn case 1: 12931323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 12941323061aSAndrew Lunn default: 12951323061aSAndrew Lunn return -EOPNOTSUPP; 12961323061aSAndrew Lunn } 12971323061aSAndrew Lunn default: 12981323061aSAndrew Lunn return -EOPNOTSUPP; 12991323061aSAndrew Lunn } 13001323061aSAndrew Lunn } 13011323061aSAndrew Lunn 1302c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1303c1236979SAndrew Lunn "TX_power", 1304c1236979SAndrew Lunn "RX_power", 1305c1236979SAndrew Lunn }; 1306c1236979SAndrew Lunn 1307c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1308c1236979SAndrew Lunn enum hwmon_sensor_types type, 1309c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1310c1236979SAndrew Lunn { 1311c1236979SAndrew Lunn switch (type) { 1312c1236979SAndrew Lunn case hwmon_curr: 1313c1236979SAndrew Lunn switch (attr) { 1314c1236979SAndrew Lunn case hwmon_curr_label: 1315c1236979SAndrew Lunn *str = "bias"; 1316c1236979SAndrew Lunn return 0; 1317c1236979SAndrew Lunn default: 1318c1236979SAndrew Lunn return -EOPNOTSUPP; 1319c1236979SAndrew Lunn } 1320c1236979SAndrew Lunn break; 1321c1236979SAndrew Lunn case hwmon_temp: 1322c1236979SAndrew Lunn switch (attr) { 1323c1236979SAndrew Lunn case hwmon_temp_label: 1324c1236979SAndrew Lunn *str = "temperature"; 1325c1236979SAndrew Lunn return 0; 1326c1236979SAndrew Lunn default: 1327c1236979SAndrew Lunn return -EOPNOTSUPP; 1328c1236979SAndrew Lunn } 1329c1236979SAndrew Lunn break; 1330c1236979SAndrew Lunn case hwmon_in: 1331c1236979SAndrew Lunn switch (attr) { 1332c1236979SAndrew Lunn case hwmon_in_label: 1333c1236979SAndrew Lunn *str = "VCC"; 1334c1236979SAndrew Lunn return 0; 1335c1236979SAndrew Lunn default: 1336c1236979SAndrew Lunn return -EOPNOTSUPP; 1337c1236979SAndrew Lunn } 1338c1236979SAndrew Lunn break; 1339c1236979SAndrew Lunn case hwmon_power: 1340c1236979SAndrew Lunn switch (attr) { 1341c1236979SAndrew Lunn case hwmon_power_label: 1342c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1343c1236979SAndrew Lunn return 0; 1344c1236979SAndrew Lunn default: 1345c1236979SAndrew Lunn return -EOPNOTSUPP; 1346c1236979SAndrew Lunn } 1347c1236979SAndrew Lunn break; 1348c1236979SAndrew Lunn default: 1349c1236979SAndrew Lunn return -EOPNOTSUPP; 1350c1236979SAndrew Lunn } 1351c1236979SAndrew Lunn 1352c1236979SAndrew Lunn return -EOPNOTSUPP; 1353c1236979SAndrew Lunn } 1354c1236979SAndrew Lunn 13551323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 13561323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 13571323061aSAndrew Lunn .read = sfp_hwmon_read, 1358c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 13591323061aSAndrew Lunn }; 13601323061aSAndrew Lunn 1361815f5f57SBeniamin Sandu static const struct hwmon_channel_info *sfp_hwmon_info[] = { 1362815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1363815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1364815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 13651323061aSAndrew Lunn HWMON_I_INPUT | 13661323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 13671323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 13681323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1369c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1370815f5f57SBeniamin Sandu HWMON_I_LABEL), 1371815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1372815f5f57SBeniamin Sandu HWMON_T_INPUT | 1373815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1374815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1375815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1376815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1377815f5f57SBeniamin Sandu HWMON_T_LABEL), 1378815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 13791323061aSAndrew Lunn HWMON_C_INPUT | 13801323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 13811323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 13821323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1383c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1384815f5f57SBeniamin Sandu HWMON_C_LABEL), 1385815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 13861323061aSAndrew Lunn /* Transmit power */ 13871323061aSAndrew Lunn HWMON_P_INPUT | 13881323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 13891323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 13901323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1391c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1392c1236979SAndrew Lunn HWMON_P_LABEL, 13931323061aSAndrew Lunn /* Receive power */ 13941323061aSAndrew Lunn HWMON_P_INPUT | 13951323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 13961323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 13971323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1398c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1399815f5f57SBeniamin Sandu HWMON_P_LABEL), 14001323061aSAndrew Lunn NULL, 14011323061aSAndrew Lunn }; 14021323061aSAndrew Lunn 14031323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 14041323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 14051323061aSAndrew Lunn .info = sfp_hwmon_info, 14061323061aSAndrew Lunn }; 14071323061aSAndrew Lunn 1408139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 14091323061aSAndrew Lunn { 1410139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 14113f118c44SMichael Walle int err; 14121323061aSAndrew Lunn 1413426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1414426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1415426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1416426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1417426c6cbcSPali Rohár * skip registration of hwmon device. 1418426c6cbcSPali Rohár */ 1419426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1420426c6cbcSPali Rohár dev_info(sfp->dev, 1421426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1422426c6cbcSPali Rohár dev_info(sfp->dev, 1423426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1424426c6cbcSPali Rohár return; 1425426c6cbcSPali Rohár } 1426426c6cbcSPali Rohár 1427139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1428139d3a21SRussell King if (err < 0) { 1429139d3a21SRussell King if (sfp->hwmon_tries--) { 1430139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1431139d3a21SRussell King T_PROBE_RETRY_SLOW); 1432139d3a21SRussell King } else { 14339ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 14349ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1435139d3a21SRussell King } 1436139d3a21SRussell King return; 1437139d3a21SRussell King } 1438139d3a21SRussell King 14393f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 14403f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1441139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1442139d3a21SRussell King return; 1443139d3a21SRussell King } 1444139d3a21SRussell King 1445139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1446139d3a21SRussell King sfp->hwmon_name, sfp, 1447139d3a21SRussell King &sfp_hwmon_chip_info, 1448139d3a21SRussell King NULL); 1449139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1450139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1451139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1452139d3a21SRussell King } 1453139d3a21SRussell King 1454139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1455139d3a21SRussell King { 14561323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 14571323061aSAndrew Lunn return 0; 14581323061aSAndrew Lunn 14591323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 14601323061aSAndrew Lunn return 0; 14611323061aSAndrew Lunn 14621323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 14631323061aSAndrew Lunn /* This driver in general does not support address 14641323061aSAndrew Lunn * change. 14651323061aSAndrew Lunn */ 14661323061aSAndrew Lunn return 0; 14671323061aSAndrew Lunn 1468139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1469139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 14701323061aSAndrew Lunn 1471139d3a21SRussell King return 0; 14721323061aSAndrew Lunn } 14731323061aSAndrew Lunn 14741323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 14751323061aSAndrew Lunn { 1476139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 14773e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 14781323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 14793e322474SAndrew Lunn sfp->hwmon_dev = NULL; 14801323061aSAndrew Lunn kfree(sfp->hwmon_name); 14811323061aSAndrew Lunn } 14823e322474SAndrew Lunn } 1483139d3a21SRussell King 1484139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1485139d3a21SRussell King { 1486139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1487139d3a21SRussell King 1488139d3a21SRussell King return 0; 1489139d3a21SRussell King } 1490139d3a21SRussell King 1491139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1492139d3a21SRussell King { 1493139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1494139d3a21SRussell King } 14951323061aSAndrew Lunn #else 14961323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 14971323061aSAndrew Lunn { 14981323061aSAndrew Lunn return 0; 14991323061aSAndrew Lunn } 15001323061aSAndrew Lunn 15011323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15021323061aSAndrew Lunn { 15031323061aSAndrew Lunn } 1504139d3a21SRussell King 1505139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1506139d3a21SRussell King { 1507139d3a21SRussell King return 0; 1508139d3a21SRussell King } 1509139d3a21SRussell King 1510139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1511139d3a21SRussell King { 1512139d3a21SRussell King } 15131323061aSAndrew Lunn #endif 15141323061aSAndrew Lunn 151573970055SRussell King /* Helpers */ 151673970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 151773970055SRussell King { 151873970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 151973970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 152073970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 152173970055SRussell King sfp_set_state(sfp, sfp->state); 152273970055SRussell King } 152373970055SRussell King 152473970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 152573970055SRussell King { 152673970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 152773970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 152873970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 152973970055SRussell King sfp_set_state(sfp, sfp->state); 153073970055SRussell King } 153173970055SRussell King 15329cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 15339cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 15349cc8976cSRussell King { 15359cc8976cSRussell King struct sfp *sfp = s->private; 15369cc8976cSRussell King 15379cc8976cSRussell King seq_printf(s, "Module state: %s\n", 15389cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 15399cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 15409cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 15419cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 15429cc8976cSRussell King seq_printf(s, "Device state: %s\n", 15439cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 15449cc8976cSRussell King seq_printf(s, "Main state: %s\n", 15459cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 15469cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 15479cc8976cSRussell King sfp->sm_fault_retries); 15489cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 15499cc8976cSRussell King sfp->sm_phy_retries); 15509cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 15519cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 15529cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 15539cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 15549cc8976cSRussell King return 0; 15559cc8976cSRussell King } 15569cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 15579cc8976cSRussell King 15589cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15599cc8976cSRussell King { 15609cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 15619cc8976cSRussell King 15629cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 15639cc8976cSRussell King &sfp_debug_state_fops); 15649cc8976cSRussell King } 15659cc8976cSRussell King 15669cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15679cc8976cSRussell King { 15689cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 15699cc8976cSRussell King } 15709cc8976cSRussell King #else 15719cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 15729cc8976cSRussell King { 15739cc8976cSRussell King } 15749cc8976cSRussell King 15759cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 15769cc8976cSRussell King { 15779cc8976cSRussell King } 15789cc8976cSRussell King #endif 15799cc8976cSRussell King 158073970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 158173970055SRussell King { 158273970055SRussell King unsigned int state = sfp->state; 158373970055SRussell King 158473970055SRussell King if (state & SFP_F_TX_DISABLE) 158573970055SRussell King return; 158673970055SRussell King 158773970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 158873970055SRussell King 158973970055SRussell King udelay(T_RESET_US); 159073970055SRussell King 159173970055SRussell King sfp_set_state(sfp, state); 159273970055SRussell King } 159373970055SRussell King 159473970055SRussell King /* SFP state machine */ 159573970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 159673970055SRussell King { 159773970055SRussell King if (timeout) 159873970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 159973970055SRussell King timeout); 160073970055SRussell King else 160173970055SRussell King cancel_delayed_work(&sfp->timeout); 160273970055SRussell King } 160373970055SRussell King 160473970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 160573970055SRussell King unsigned int timeout) 160673970055SRussell King { 160773970055SRussell King sfp->sm_state = state; 160873970055SRussell King sfp_sm_set_timer(sfp, timeout); 160973970055SRussell King } 161073970055SRussell King 16110936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1612516b29edSFlorian Fainelli unsigned int timeout) 161373970055SRussell King { 161473970055SRussell King sfp->sm_mod_state = state; 161573970055SRussell King sfp_sm_set_timer(sfp, timeout); 161673970055SRussell King } 161773970055SRussell King 161873970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 161973970055SRussell King { 162073970055SRussell King sfp_remove_phy(sfp->sfp_bus); 162173970055SRussell King phy_device_remove(sfp->mod_phy); 162273970055SRussell King phy_device_free(sfp->mod_phy); 162373970055SRussell King sfp->mod_phy = NULL; 162473970055SRussell King } 162573970055SRussell King 1626324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 162773970055SRussell King { 162873970055SRussell King struct phy_device *phy; 162973970055SRussell King int err; 163073970055SRussell King 1631324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 16321cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 16331cb89a14SRussell King return PTR_ERR(phy); 163420b56ed9SRussell King if (IS_ERR(phy)) { 16359ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1636256e43cbSRussell King return PTR_ERR(phy); 163773970055SRussell King } 163873970055SRussell King 16399a484621SRussell King err = phy_device_register(phy); 16409a484621SRussell King if (err) { 16419a484621SRussell King phy_device_free(phy); 16429ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 16439ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1644256e43cbSRussell King return err; 16459a484621SRussell King } 16469a484621SRussell King 164773970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 164873970055SRussell King if (err) { 164973970055SRussell King phy_device_remove(phy); 165073970055SRussell King phy_device_free(phy); 16519ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1652256e43cbSRussell King return err; 165373970055SRussell King } 165473970055SRussell King 165573970055SRussell King sfp->mod_phy = phy; 1656256e43cbSRussell King 1657256e43cbSRussell King return 0; 165873970055SRussell King } 165973970055SRussell King 166073970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 166173970055SRussell King { 166273970055SRussell King sfp_link_up(sfp->sfp_bus); 166373970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 166473970055SRussell King } 166573970055SRussell King 166673970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 166773970055SRussell King { 166873970055SRussell King sfp_link_down(sfp->sfp_bus); 166973970055SRussell King } 167073970055SRussell King 167173970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 167273970055SRussell King { 1673624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1674624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1675624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1676624407d2SRussell King bool los = false; 167773970055SRussell King 1678710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1679624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1680624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 168173970055SRussell King */ 1682624407d2SRussell King if (los_options == los_inverted) 1683624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1684624407d2SRussell King else if (los_options == los_normal) 1685624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 168673970055SRussell King 168773970055SRussell King if (los) 168873970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 168973970055SRussell King else 169073970055SRussell King sfp_sm_link_up(sfp); 169173970055SRussell King } 169273970055SRussell King 1693710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1694710dfbb0SRussell King { 1695624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1696624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1697624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1698624407d2SRussell King 1699624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1700624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1701710dfbb0SRussell King } 1702710dfbb0SRussell King 1703710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1704710dfbb0SRussell King { 1705624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1706624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1707624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1708624407d2SRussell King 1709624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1710624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1711710dfbb0SRussell King } 1712710dfbb0SRussell King 171363ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 171473970055SRussell King { 1715281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1716516b29edSFlorian Fainelli dev_err(sfp->dev, 1717516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 171873970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 171973970055SRussell King } else { 172073970055SRussell King if (warn) 172173970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 172273970055SRussell King 172363ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 172473970055SRussell King } 172573970055SRussell King } 172673970055SRussell King 1727e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1728e85b1347SMarek Behún { 1729e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1730e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1731e85b1347SMarek Behún 1732e85b1347SMarek Behún return 0; 1733e85b1347SMarek Behún } 1734e85b1347SMarek Behún 17359a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 17369a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 17379a484621SRussell King * or clause 45 PHY. 17389a484621SRussell King * 17399a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 17409a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 17419a484621SRussell King * PHY driver to determine. 17429a484621SRussell King * 17439a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 17449a484621SRussell King * mode according to the negotiated line speed. 17459a484621SRussell King */ 1746256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1747181f29daSRussell King { 1748256e43cbSRussell King int err = 0; 1749256e43cbSRussell King 1750e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1751e85b1347SMarek Behún case MDIO_I2C_NONE: 17529a484621SRussell King break; 17539a484621SRussell King 1754e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1755324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 17569a484621SRussell King break; 1757e85b1347SMarek Behún 1758e85b1347SMarek Behún case MDIO_I2C_C45: 1759324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1760e85b1347SMarek Behún break; 176109bbedacSMarek Behún 176209bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1763324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 176409bbedacSMarek Behún break; 17659a484621SRussell King } 1766e85b1347SMarek Behún 1767256e43cbSRussell King return err; 176873970055SRussell King } 176973970055SRussell King 1770ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 17713bb35261SJon Nettleton { 1772ed32abb1SRussell King u32 power_mW = 1000; 17735765cee1SRussell King (Oracle) bool supports_a2; 17743bb35261SJon Nettleton 177518cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 177618cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1777ed32abb1SRussell King power_mW = 1500; 1778f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1779f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1780f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1781ed32abb1SRussell King power_mW = 2000; 17823bb35261SJon Nettleton 178302eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 178402eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 178502eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 178602eaf5a7SRussell King (Oracle) return 0; 178702eaf5a7SRussell King (Oracle) } 178802eaf5a7SRussell King (Oracle) 17895765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 17905765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 17915765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 17925765cee1SRussell King (Oracle) 1793ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 17947cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 17955765cee1SRussell King (Oracle) if (!supports_a2) { 17967cfa9c92SRussell King /* The module appears not to implement bus address 17977cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 17987cfa9c92SRussell King * indicated mode. 17997cfa9c92SRussell King */ 18003bb35261SJon Nettleton dev_err(sfp->dev, 18013bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1802ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18033bb35261SJon Nettleton return -EINVAL; 18047cfa9c92SRussell King } else { 18053bb35261SJon Nettleton dev_warn(sfp->dev, 18063bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1807ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18083bb35261SJon Nettleton return 0; 18093bb35261SJon Nettleton } 18107cfa9c92SRussell King } 18117cfa9c92SRussell King 18125765cee1SRussell King (Oracle) if (!supports_a2) { 18135765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 18145765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 18155765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 18165765cee1SRussell King (Oracle) */ 18175765cee1SRussell King (Oracle) return 0; 18185765cee1SRussell King (Oracle) } 18195765cee1SRussell King (Oracle) 18207cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 18217cfa9c92SRussell King * an address change sequence, warn the user that the module may 18227cfa9c92SRussell King * not be functional. 18237cfa9c92SRussell King */ 18245765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 18257cfa9c92SRussell King dev_warn(sfp->dev, 182607f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 18277cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 18287cfa9c92SRussell King return 0; 18297cfa9c92SRussell King } 18303bb35261SJon Nettleton 1831ed32abb1SRussell King sfp->module_power_mW = power_mW; 1832ed32abb1SRussell King 1833ed32abb1SRussell King return 0; 1834ed32abb1SRussell King } 1835ed32abb1SRussell King 1836b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1837ed32abb1SRussell King { 1838ed32abb1SRussell King int err; 1839ed32abb1SRussell King 1840bd1432f6SRussell King (Oracle) err = sfp_modify_u8(sfp, true, SFP_EXT_STATUS, 1841bd1432f6SRussell King (Oracle) SFP_EXT_STATUS_PWRLVL_SELECT, 1842bd1432f6SRussell King (Oracle) enable ? SFP_EXT_STATUS_PWRLVL_SELECT : 0); 1843bd1432f6SRussell King (Oracle) if (err != sizeof(u8)) { 1844bd1432f6SRussell King (Oracle) dev_err(sfp->dev, "failed to %sable high power: %pe\n", 1845bd1432f6SRussell King (Oracle) enable ? "en" : "dis", ERR_PTR(err)); 1846b036a554SRussell King return -EAGAIN; 18473bb35261SJon Nettleton } 18483bb35261SJon Nettleton 1849b036a554SRussell King if (enable) 18503bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1851ed32abb1SRussell King sfp->module_power_mW / 1000, 1852ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 18533bb35261SJon Nettleton 1854b036a554SRussell King return 0; 18553bb35261SJon Nettleton } 18563bb35261SJon Nettleton 1857426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1858426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1859426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1860426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1861426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1862426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1863426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1864426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1865426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1866426c6cbcSPali Rohár * at a time. 18670d035bedSRussell King */ 1868426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 18690d035bedSRussell King { 1870426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 18710d035bedSRussell King 1872426c6cbcSPali Rohár /* Already using byte IO */ 1873426c6cbcSPali Rohár if (block_size == 1) 1874426c6cbcSPali Rohár return false; 1875426c6cbcSPali Rohár 1876426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1877426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1878426c6cbcSPali Rohár return false; 18790d035bedSRussell King } 1880426c6cbcSPali Rohár return true; 18810d035bedSRussell King } 18820d035bedSRussell King 1883b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1884b18432c5SChris Healy { 1885b18432c5SChris Healy u8 check; 1886b18432c5SChris Healy int err; 1887b18432c5SChris Healy 1888b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1889b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1890b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1891b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1892b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1893b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1894b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1895b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1896b18432c5SChris Healy if (err != 3) { 18979ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 18989ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 18999ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1900b18432c5SChris Healy return err; 1901b18432c5SChris Healy } 1902b18432c5SChris Healy 1903b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1904b18432c5SChris Healy mdelay(50); 1905b18432c5SChris Healy 1906b18432c5SChris Healy /* Update base structure checksum */ 1907b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1908b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1909b18432c5SChris Healy if (err != 1) { 19109ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19119ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 19129ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1913b18432c5SChris Healy return err; 1914b18432c5SChris Healy } 1915b18432c5SChris Healy } 1916b18432c5SChris Healy return 0; 1917b18432c5SChris Healy } 1918b18432c5SChris Healy 1919e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 192073970055SRussell King { 192173970055SRussell King /* SFP module inserted - read I2C data */ 192273970055SRussell King struct sfp_eeprom_id id; 1923b18432c5SChris Healy bool cotsworks_sfbg; 1924981f1f80SRussell King bool cotsworks; 192573970055SRussell King u8 check; 19263bb35261SJon Nettleton int ret; 192773970055SRussell King 1928426c6cbcSPali Rohár /* Some SFP modules and also some Linux I2C drivers do not like reads 1929426c6cbcSPali Rohár * longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at 1930426c6cbcSPali Rohár * a time. 19310d035bedSRussell King */ 1932426c6cbcSPali Rohár sfp->i2c_block_size = 16; 19330d035bedSRussell King 19340d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 19353bb35261SJon Nettleton if (ret < 0) { 1936e117be74SRussell King if (report) 19379ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 19389ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 193973970055SRussell King return -EAGAIN; 194073970055SRussell King } 194173970055SRussell King 19420d035bedSRussell King if (ret != sizeof(id.base)) { 19439ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 194473970055SRussell King return -EAGAIN; 194573970055SRussell King } 194673970055SRussell King 1947426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1948426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1949426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1950426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1951426c6cbcSPali Rohár * is really required and we have no other option. 1952426c6cbcSPali Rohár */ 1953426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1954426c6cbcSPali Rohár dev_info(sfp->dev, 1955426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1956426c6cbcSPali Rohár dev_info(sfp->dev, 1957426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1958426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1959426c6cbcSPali Rohár 1960426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1961426c6cbcSPali Rohár if (ret < 0) { 1962426c6cbcSPali Rohár if (report) 19639ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19649ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 19659ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1966426c6cbcSPali Rohár return -EAGAIN; 1967426c6cbcSPali Rohár } 1968426c6cbcSPali Rohár 1969426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 19709ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 19719ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1972426c6cbcSPali Rohár return -EAGAIN; 1973426c6cbcSPali Rohár } 1974426c6cbcSPali Rohár } 1975426c6cbcSPali Rohár 1976981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1977981f1f80SRussell King * do the final programming with the final module part number, 1978981f1f80SRussell King * serial number and date code. 1979981f1f80SRussell King */ 1980981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1981b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1982b18432c5SChris Healy 1983b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1984b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1985b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1986b18432c5SChris Healy */ 1987b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1988b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1989b18432c5SChris Healy if (ret < 0) 1990b18432c5SChris Healy return ret; 1991b18432c5SChris Healy } 1992981f1f80SRussell King 199373970055SRussell King /* Validate the checksum over the base structure */ 199473970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 199573970055SRussell King if (check != id.base.cc_base) { 1996981f1f80SRussell King if (cotsworks) { 1997981f1f80SRussell King dev_warn(sfp->dev, 1998981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1999981f1f80SRussell King check, id.base.cc_base); 2000981f1f80SRussell King } else { 200173970055SRussell King dev_err(sfp->dev, 2002981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2003981f1f80SRussell King check, id.base.cc_base); 200473970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2005981f1f80SRussell King 16, 1, &id, sizeof(id), true); 200673970055SRussell King return -EINVAL; 200773970055SRussell King } 2008981f1f80SRussell King } 200973970055SRussell King 20100d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 20110d035bedSRussell King if (ret < 0) { 20120d035bedSRussell King if (report) 20139ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 20149ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 20150d035bedSRussell King return -EAGAIN; 20160d035bedSRussell King } 20170d035bedSRussell King 20180d035bedSRussell King if (ret != sizeof(id.ext)) { 20199ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 20200d035bedSRussell King return -EAGAIN; 20210d035bedSRussell King } 20220d035bedSRussell King 202373970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 202473970055SRussell King if (check != id.ext.cc_ext) { 2025981f1f80SRussell King if (cotsworks) { 2026981f1f80SRussell King dev_warn(sfp->dev, 2027981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2028981f1f80SRussell King check, id.ext.cc_ext); 2029981f1f80SRussell King } else { 203073970055SRussell King dev_err(sfp->dev, 2031981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2032981f1f80SRussell King check, id.ext.cc_ext); 2033981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2034981f1f80SRussell King 16, 1, &id, sizeof(id), true); 203573970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 203673970055SRussell King } 2037981f1f80SRussell King } 203873970055SRussell King 203973970055SRussell King sfp->id = id; 204073970055SRussell King 2041a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2042a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2043a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2044a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2045a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2046a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 204773970055SRussell King 2048259c8618SRussell King /* Check whether we support this module */ 2049f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2050259c8618SRussell King dev_err(sfp->dev, 2051259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 205273970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 205373970055SRussell King return -EINVAL; 205473970055SRussell King } 205573970055SRussell King 2056ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 2057ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 2058ec7681bdSRussell King dev_warn(sfp->dev, 2059ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 2060ec7681bdSRussell King 2061ed32abb1SRussell King /* Parse the module power requirement */ 2062ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2063ed32abb1SRussell King if (ret < 0) 2064ed32abb1SRussell King return ret; 2065ed32abb1SRussell King 20668475c4b7SRussell King (Oracle) /* Initialise state bits to use from hardware */ 20678475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 20688475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 20698475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_DISABLE; 20708475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 20718475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_FAULT; 20728475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 20738475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_LOS; 20748475c4b7SRussell King (Oracle) 207526c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2076324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 207726c97a2dSRussell King 20782069624dSMatthew Hagan sfp->tx_fault_ignore = false; 20792069624dSMatthew Hagan 2080e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2081e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2082e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2083e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2084e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2085e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2086e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2087e85b1347SMarek Behún else 2088e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2089e85b1347SMarek Behún 209023571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 209127541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 209227541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 209323571c7bSRussell King (Oracle) 2094b036a554SRussell King return 0; 209573970055SRussell King } 209673970055SRussell King 209773970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 209873970055SRussell King { 209973f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 210073970055SRussell King sfp_module_remove(sfp->sfp_bus); 210173970055SRussell King 21021323061aSAndrew Lunn sfp_hwmon_remove(sfp); 21031323061aSAndrew Lunn 210473970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2105ed32abb1SRussell King sfp->module_power_mW = 0; 210673970055SRussell King 210773970055SRussell King dev_info(sfp->dev, "module removed\n"); 210873970055SRussell King } 210973970055SRussell King 21106b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2111e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 211273970055SRussell King { 2113e85d81a1SRussell King switch (sfp->sm_dev_state) { 2114e85d81a1SRussell King default: 21156b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 21166b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 21176b0da5c9SRussell King break; 21186b0da5c9SRussell King 21196b0da5c9SRussell King case SFP_DEV_DOWN: 21206b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21216b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21226b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2123e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2124e85d81a1SRussell King break; 212573970055SRussell King 2126e85d81a1SRussell King case SFP_DEV_UP: 21276b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21286b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21296b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2130e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2131e85d81a1SRussell King break; 2132e85d81a1SRussell King } 2133e85d81a1SRussell King } 213473970055SRussell King 2135d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2136d900954fSRussell King * the on-board EEPROM, and sets up the power level. 213773970055SRussell King */ 2138e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2139e85d81a1SRussell King { 2140b036a554SRussell King int err; 2141b036a554SRussell King 2142b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2143b036a554SRussell King if (event == SFP_E_REMOVE) { 2144d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2145d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2146b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2147b036a554SRussell King return; 2148b036a554SRussell King } 2149b036a554SRussell King 2150b036a554SRussell King /* Handle device detach globally */ 215173f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 215273f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2153b036a554SRussell King if (sfp->module_power_mW > 1000 && 2154b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2155b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 215673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2157d2e816c0SRussell King return; 2158d2e816c0SRussell King } 2159d2e816c0SRussell King 216073970055SRussell King switch (sfp->sm_mod_state) { 216173970055SRussell King default: 2162e117be74SRussell King if (event == SFP_E_INSERT) { 2163d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2164e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2165e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2166e117be74SRussell King } 216773970055SRussell King break; 216873970055SRussell King 216973970055SRussell King case SFP_MOD_PROBE: 217073f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2171b036a554SRussell King if (event != SFP_E_TIMEOUT) 2172b036a554SRussell King break; 217373970055SRussell King 2174e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2175b036a554SRussell King if (err == -EAGAIN) { 2176e117be74SRussell King if (sfp->sm_mod_tries_init && 2177e117be74SRussell King --sfp->sm_mod_tries_init) { 2178e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2179b036a554SRussell King break; 2180e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2181e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2182e117be74SRussell King dev_warn(sfp->dev, 2183e117be74SRussell King "please wait, module slow to respond\n"); 2184e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2185e117be74SRussell King break; 2186e117be74SRussell King } 2187b036a554SRussell King } 2188b036a554SRussell King if (err < 0) { 2189b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2190b036a554SRussell King break; 2191b036a554SRussell King } 2192b036a554SRussell King 2193*04361b8bSRussell King (Oracle) /* Force a poll to re-read the hardware signal state after 2194*04361b8bSRussell King (Oracle) * sfp_sm_mod_probe() changed state_hw_mask. 2195*04361b8bSRussell King (Oracle) */ 2196*04361b8bSRussell King (Oracle) mod_delayed_work(system_wq, &sfp->poll, 1); 2197*04361b8bSRussell King (Oracle) 219838ecd706SRussell King err = sfp_hwmon_insert(sfp); 219938ecd706SRussell King if (err) 22009ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 22019ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 220238ecd706SRussell King 220373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2204df561f66SGustavo A. R. Silva fallthrough; 220573f5e847SRussell King case SFP_MOD_WAITDEV: 220673f5e847SRussell King /* Ensure that the device is attached before proceeding */ 220773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 220873f5e847SRussell King break; 220973f5e847SRussell King 221073f5e847SRussell King /* Report the module insertion to the upstream device */ 221123571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 221223571c7bSRussell King (Oracle) sfp->quirk); 221373f5e847SRussell King if (err < 0) { 221473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 221573f5e847SRussell King break; 221673f5e847SRussell King } 221773f5e847SRussell King 2218b036a554SRussell King /* If this is a power level 1 module, we are done */ 2219b036a554SRussell King if (sfp->module_power_mW <= 1000) 2220b036a554SRussell King goto insert; 2221b036a554SRussell King 2222b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2223df561f66SGustavo A. R. Silva fallthrough; 2224b036a554SRussell King case SFP_MOD_HPOWER: 2225b036a554SRussell King /* Enable high power mode */ 2226b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 222773f5e847SRussell King if (err < 0) { 222873f5e847SRussell King if (err != -EAGAIN) { 222973f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 22300936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 223173f5e847SRussell King } else { 2232e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 223373f5e847SRussell King } 223473f5e847SRussell King break; 223573f5e847SRussell King } 223673f5e847SRussell King 223773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 223873970055SRussell King break; 223973970055SRussell King 2240b036a554SRussell King case SFP_MOD_WAITPWR: 2241b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2242b036a554SRussell King if (event != SFP_E_TIMEOUT) 2243b036a554SRussell King break; 2244b036a554SRussell King 2245b036a554SRussell King insert: 22460936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 22473bb35261SJon Nettleton break; 2248b036a554SRussell King 224973970055SRussell King case SFP_MOD_PRESENT: 225073970055SRussell King case SFP_MOD_ERROR: 225173970055SRussell King break; 225273970055SRussell King } 225373970055SRussell King } 225473970055SRussell King 2255e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2256e85d81a1SRussell King { 2257eefa6f1fSRussell King unsigned long timeout; 22581cb89a14SRussell King int ret; 2259eefa6f1fSRussell King 226073970055SRussell King /* Some events are global */ 226173970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 226273970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 226373970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 226473970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 226573970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 226673970055SRussell King sfp_sm_link_down(sfp); 226774c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 226874c551caSRussell King sfp_module_stop(sfp->sfp_bus); 226973970055SRussell King if (sfp->mod_phy) 227073970055SRussell King sfp_sm_phy_detach(sfp); 2271e85b1347SMarek Behún if (sfp->i2c_mii) 2272e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 22731539e0d3SRussell King sfp_module_tx_disable(sfp); 2274f3c9a666SRussell King sfp_soft_stop_poll(sfp); 227573970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 227673970055SRussell King return; 227773970055SRussell King } 227873970055SRussell King 227973970055SRussell King /* The main state machine */ 228073970055SRussell King switch (sfp->sm_state) { 228173970055SRussell King case SFP_S_DOWN: 2282eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2283eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2284eefa6f1fSRussell King break; 2285eefa6f1fSRussell King 2286f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2287f3c9a666SRussell King sfp_soft_start_poll(sfp); 2288f3c9a666SRussell King 2289f3c9a666SRussell King sfp_module_tx_enable(sfp); 2290eefa6f1fSRussell King 2291eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2292281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2293eefa6f1fSRussell King 2294eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2295eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2296324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2297324e88cbSMarek Behún * specific modules). 2298eefa6f1fSRussell King */ 2299324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2300eefa6f1fSRussell King break; 2301eefa6f1fSRussell King 2302eefa6f1fSRussell King case SFP_S_WAIT: 2303eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2304eefa6f1fSRussell King break; 2305eefa6f1fSRussell King 2306eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 230726c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 230826c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 230926c97a2dSRussell King * initialise, which is indicated by TX_FAULT 231026c97a2dSRussell King * deasserting. 2311181f29daSRussell King */ 231226c97a2dSRussell King timeout = sfp->module_t_start_up; 2313324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2314324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2315eefa6f1fSRussell King else 2316eefa6f1fSRussell King timeout = 1; 2317eefa6f1fSRussell King 2318eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2319eefa6f1fSRussell King } else { 2320eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2321eefa6f1fSRussell King * finished initialising. 2322eefa6f1fSRussell King */ 2323eefa6f1fSRussell King goto init_done; 2324181f29daSRussell King } 232573970055SRussell King break; 232673970055SRussell King 232773970055SRussell King case SFP_S_INIT: 2328d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2329e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 233026c97a2dSRussell King * or t_start_up, so assume there is a fault. 2331d23751a0SRussell King */ 2332d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2333281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2334d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 23351cb89a14SRussell King init_done: 2336e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2337e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2338e85b1347SMarek Behún if (ret < 0) { 2339e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2340e85b1347SMarek Behún break; 2341e85b1347SMarek Behún } 23421cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 23431cb89a14SRussell King goto phy_probe; 23441cb89a14SRussell King } 23451cb89a14SRussell King break; 23461cb89a14SRussell King 23471cb89a14SRussell King case SFP_S_INIT_PHY: 23481cb89a14SRussell King if (event != SFP_E_TIMEOUT) 23491cb89a14SRussell King break; 23501cb89a14SRussell King phy_probe: 23511cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2352d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2353d23751a0SRussell King */ 23541cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 23551cb89a14SRussell King if (ret == -ENODEV) { 23561cb89a14SRussell King if (--sfp->sm_phy_retries) { 23571cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 23581cb89a14SRussell King break; 23591cb89a14SRussell King } else { 23601cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 23611cb89a14SRussell King } 23621cb89a14SRussell King } else if (ret) { 2363256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2364256e43cbSRussell King break; 2365256e43cbSRussell King } 236674c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 236774c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 236874c551caSRussell King break; 236974c551caSRussell King } 2370d23751a0SRussell King sfp_sm_link_check_los(sfp); 2371d23751a0SRussell King 2372d23751a0SRussell King /* Reset the fault retry count */ 2373281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2374d23751a0SRussell King break; 2375d23751a0SRussell King 2376d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2377d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2378d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 237926c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2380d23751a0SRussell King } 238173970055SRussell King break; 238273970055SRussell King 238373970055SRussell King case SFP_S_WAIT_LOS: 238473970055SRussell King if (event == SFP_E_TX_FAULT) 238563ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2386710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 238773970055SRussell King sfp_sm_link_up(sfp); 238873970055SRussell King break; 238973970055SRussell King 239073970055SRussell King case SFP_S_LINK_UP: 239173970055SRussell King if (event == SFP_E_TX_FAULT) { 239273970055SRussell King sfp_sm_link_down(sfp); 239363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2394710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 239573970055SRussell King sfp_sm_link_down(sfp); 239673970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 239773970055SRussell King } 239873970055SRussell King break; 239973970055SRussell King 240073970055SRussell King case SFP_S_TX_FAULT: 240173970055SRussell King if (event == SFP_E_TIMEOUT) { 240273970055SRussell King sfp_module_tx_fault_reset(sfp); 240326c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 240473970055SRussell King } 240573970055SRussell King break; 240673970055SRussell King 240773970055SRussell King case SFP_S_REINIT: 240873970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 240963ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 241073970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 241173970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 241273970055SRussell King sfp_sm_link_check_los(sfp); 241373970055SRussell King } 241473970055SRussell King break; 241573970055SRussell King 241673970055SRussell King case SFP_S_TX_DISABLE: 241773970055SRussell King break; 241873970055SRussell King } 2419e85d81a1SRussell King } 2420e85d81a1SRussell King 2421e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2422e85d81a1SRussell King { 2423e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2424e85d81a1SRussell King 2425e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2426e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2427e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2428e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2429e85d81a1SRussell King event_to_str(event)); 2430e85d81a1SRussell King 2431e85d81a1SRussell King sfp_sm_device(sfp, event); 24326b0da5c9SRussell King sfp_sm_module(sfp, event); 2433e85d81a1SRussell King sfp_sm_main(sfp, event); 243473970055SRussell King 24354005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 24364005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 24374005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 24384005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 243973970055SRussell King 244073970055SRussell King mutex_unlock(&sfp->sm_mutex); 244173970055SRussell King } 244273970055SRussell King 2443b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2444b5bfc21aSRussell King { 24456b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2446b5bfc21aSRussell King } 2447b5bfc21aSRussell King 2448b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2449b5bfc21aSRussell King { 24506b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2451b5bfc21aSRussell King } 2452b5bfc21aSRussell King 245373970055SRussell King static void sfp_start(struct sfp *sfp) 245473970055SRussell King { 245573970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 245673970055SRussell King } 245773970055SRussell King 245873970055SRussell King static void sfp_stop(struct sfp *sfp) 245973970055SRussell King { 246073970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 246173970055SRussell King } 246273970055SRussell King 246373970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 246473970055SRussell King { 246573970055SRussell King /* locking... and check module is present */ 246673970055SRussell King 2467ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2468ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 246973970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 247073970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 247173970055SRussell King } else { 247273970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 247373970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 247473970055SRussell King } 247573970055SRussell King return 0; 247673970055SRussell King } 247773970055SRussell King 247873970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 247973970055SRussell King u8 *data) 248073970055SRussell King { 248173970055SRussell King unsigned int first, last, len; 248273970055SRussell King int ret; 248373970055SRussell King 248473970055SRussell King if (ee->len == 0) 248573970055SRussell King return -EINVAL; 248673970055SRussell King 248773970055SRussell King first = ee->offset; 248873970055SRussell King last = ee->offset + ee->len; 248973970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 249073970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 249173970055SRussell King len -= first; 249273970055SRussell King 24932794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 249473970055SRussell King if (ret < 0) 249573970055SRussell King return ret; 249673970055SRussell King 249773970055SRussell King first += len; 249873970055SRussell King data += len; 249973970055SRussell King } 25002794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 250173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 250273970055SRussell King len -= first; 250373970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 250473970055SRussell King 25052794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 250673970055SRussell King if (ret < 0) 250773970055SRussell King return ret; 250873970055SRussell King } 250973970055SRussell King return 0; 251073970055SRussell King } 251173970055SRussell King 2512d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2513d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2514d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2515d740513fSAndrew Lunn { 2516d740513fSAndrew Lunn if (page->bank) { 2517d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2518d740513fSAndrew Lunn return -EOPNOTSUPP; 2519d740513fSAndrew Lunn } 2520d740513fSAndrew Lunn 2521d740513fSAndrew Lunn if (page->page) { 2522d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2523d740513fSAndrew Lunn return -EOPNOTSUPP; 2524d740513fSAndrew Lunn } 2525d740513fSAndrew Lunn 2526d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2527d740513fSAndrew Lunn page->i2c_address != 0x51) { 2528d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2529d740513fSAndrew Lunn return -EOPNOTSUPP; 2530d740513fSAndrew Lunn } 2531d740513fSAndrew Lunn 2532d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2533d740513fSAndrew Lunn page->data, page->length); 2534d740513fSAndrew Lunn }; 2535d740513fSAndrew Lunn 253673970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2537b5bfc21aSRussell King .attach = sfp_attach, 2538b5bfc21aSRussell King .detach = sfp_detach, 253973970055SRussell King .start = sfp_start, 254073970055SRussell King .stop = sfp_stop, 254173970055SRussell King .module_info = sfp_module_info, 254273970055SRussell King .module_eeprom = sfp_module_eeprom, 2543d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 254473970055SRussell King }; 254573970055SRussell King 254673970055SRussell King static void sfp_timeout(struct work_struct *work) 254773970055SRussell King { 254873970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 254973970055SRussell King 255073970055SRussell King rtnl_lock(); 255173970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 255273970055SRussell King rtnl_unlock(); 255373970055SRussell King } 255473970055SRussell King 255573970055SRussell King static void sfp_check_state(struct sfp *sfp) 255673970055SRussell King { 255773970055SRussell King unsigned int state, i, changed; 255873970055SRussell King 25592158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 256073970055SRussell King state = sfp_get_state(sfp); 256173970055SRussell King changed = state ^ sfp->state; 25622069624dSMatthew Hagan if (sfp->tx_fault_ignore) 25632069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 25642069624dSMatthew Hagan else 256573970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 256673970055SRussell King 256773970055SRussell King for (i = 0; i < GPIO_MAX; i++) 256873970055SRussell King if (changed & BIT(i)) 2569f35cb547SRussell King (Oracle) dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_names[i], 257073970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 257173970055SRussell King 257273970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 257373970055SRussell King sfp->state = state; 257473970055SRussell King 257573970055SRussell King rtnl_lock(); 257673970055SRussell King if (changed & SFP_F_PRESENT) 257773970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 257873970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 257973970055SRussell King 258073970055SRussell King if (changed & SFP_F_TX_FAULT) 258173970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 258273970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 258373970055SRussell King 258473970055SRussell King if (changed & SFP_F_LOS) 258573970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 258673970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 258773970055SRussell King rtnl_unlock(); 25882158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 258973970055SRussell King } 259073970055SRussell King 259173970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 259273970055SRussell King { 259373970055SRussell King struct sfp *sfp = data; 259473970055SRussell King 259573970055SRussell King sfp_check_state(sfp); 259673970055SRussell King 259773970055SRussell King return IRQ_HANDLED; 259873970055SRussell King } 259973970055SRussell King 260073970055SRussell King static void sfp_poll(struct work_struct *work) 260173970055SRussell King { 260273970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 260373970055SRussell King 260473970055SRussell King sfp_check_state(sfp); 2605f3c9a666SRussell King 2606f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2607f3c9a666SRussell King sfp->need_poll) 260873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 260973970055SRussell King } 261073970055SRussell King 261173970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 261273970055SRussell King { 261373970055SRussell King struct sfp *sfp; 261473970055SRussell King 261573970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 261673970055SRussell King if (!sfp) 261773970055SRussell King return ERR_PTR(-ENOMEM); 261873970055SRussell King 261973970055SRussell King sfp->dev = dev; 262073970055SRussell King 262173970055SRussell King mutex_init(&sfp->sm_mutex); 26222158e856SRobert Hancock mutex_init(&sfp->st_mutex); 262373970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 262473970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 262573970055SRussell King 2626139d3a21SRussell King sfp_hwmon_init(sfp); 2627139d3a21SRussell King 262873970055SRussell King return sfp; 262973970055SRussell King } 263073970055SRussell King 263173970055SRussell King static void sfp_cleanup(void *data) 263273970055SRussell King { 263373970055SRussell King struct sfp *sfp = data; 263473970055SRussell King 2635139d3a21SRussell King sfp_hwmon_exit(sfp); 2636139d3a21SRussell King 263773970055SRussell King cancel_delayed_work_sync(&sfp->poll); 263873970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 263973970055SRussell King if (sfp->i2c_mii) { 264073970055SRussell King mdiobus_unregister(sfp->i2c_mii); 264173970055SRussell King mdiobus_free(sfp->i2c_mii); 264273970055SRussell King } 264373970055SRussell King if (sfp->i2c) 264473970055SRussell King i2c_put_adapter(sfp->i2c); 264573970055SRussell King kfree(sfp); 264673970055SRussell King } 264773970055SRussell King 264815309fb2SRussell King (Oracle) static int sfp_i2c_get(struct sfp *sfp) 264915309fb2SRussell King (Oracle) { 265015309fb2SRussell King (Oracle) struct fwnode_handle *h; 265115309fb2SRussell King (Oracle) struct i2c_adapter *i2c; 265215309fb2SRussell King (Oracle) int err; 265315309fb2SRussell King (Oracle) 265415309fb2SRussell King (Oracle) h = fwnode_find_reference(dev_fwnode(sfp->dev), "i2c-bus", 0); 265515309fb2SRussell King (Oracle) if (IS_ERR(h)) { 265615309fb2SRussell King (Oracle) dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 265715309fb2SRussell King (Oracle) return -ENODEV; 265815309fb2SRussell King (Oracle) } 265915309fb2SRussell King (Oracle) 2660ff31a0c4SRussell King (Oracle) i2c = i2c_get_adapter_by_fwnode(h); 266115309fb2SRussell King (Oracle) if (!i2c) { 266215309fb2SRussell King (Oracle) err = -EPROBE_DEFER; 266315309fb2SRussell King (Oracle) goto put; 266415309fb2SRussell King (Oracle) } 266515309fb2SRussell King (Oracle) 266615309fb2SRussell King (Oracle) err = sfp_i2c_configure(sfp, i2c); 266715309fb2SRussell King (Oracle) if (err) 266815309fb2SRussell King (Oracle) i2c_put_adapter(i2c); 266915309fb2SRussell King (Oracle) put: 267015309fb2SRussell King (Oracle) fwnode_handle_put(h); 267115309fb2SRussell King (Oracle) return err; 267215309fb2SRussell King (Oracle) } 267315309fb2SRussell King (Oracle) 267473970055SRussell King static int sfp_probe(struct platform_device *pdev) 267573970055SRussell King { 2676259c8618SRussell King const struct sff_data *sff; 26775411ca71SChris Healy char *sfp_irq_name; 267873970055SRussell King struct sfp *sfp; 2679257c2559SRobert Hancock int err, i; 268073970055SRussell King 268173970055SRussell King sfp = sfp_alloc(&pdev->dev); 268273970055SRussell King if (IS_ERR(sfp)) 268373970055SRussell King return PTR_ERR(sfp); 268473970055SRussell King 268573970055SRussell King platform_set_drvdata(pdev, sfp); 268673970055SRussell King 26870a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 268873970055SRussell King if (err < 0) 268973970055SRussell King return err; 269073970055SRussell King 2691b71dda81SRussell King (Oracle) sff = device_get_match_data(sfp->dev); 2692b71dda81SRussell King (Oracle) if (!sff) 2693b71dda81SRussell King (Oracle) sff = &sfp_data; 2694259c8618SRussell King 2695b71dda81SRussell King (Oracle) sfp->type = sff; 26967ce236faSRuslan Babayev 269715309fb2SRussell King (Oracle) err = sfp_i2c_get(sfp); 269815309fb2SRussell King (Oracle) if (err) 269973970055SRussell King return err; 270073970055SRussell King 2701259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2702259c8618SRussell King if (sff->gpios & BIT(i)) { 270373970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 2704f35cb547SRussell King (Oracle) gpio_names[i], gpio_flags[i]); 270573970055SRussell King if (IS_ERR(sfp->gpio[i])) 270673970055SRussell King return PTR_ERR(sfp->gpio[i]); 270773970055SRussell King } 270873970055SRussell King 27098475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 27108475c4b7SRussell King (Oracle) 271173970055SRussell King sfp->get_state = sfp_gpio_get_state; 271273970055SRussell King sfp->set_state = sfp_gpio_set_state; 2713259c8618SRussell King 2714259c8618SRussell King /* Modules that have no detect signal are always present */ 2715259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2716259c8618SRussell King sfp->get_state = sff_gpio_get_state; 271773970055SRussell King 27183bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 27193bb35261SJon Nettleton &sfp->max_power_mW); 272002eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 272102eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 272202eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 272302eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 27243bb35261SJon Nettleton sfp->max_power_mW = 1000; 272502eaf5a7SRussell King (Oracle) } 27263bb35261SJon Nettleton 27273bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 27283bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 27293bb35261SJon Nettleton 273073970055SRussell King /* Get the initial state, and always signal TX disable, 273173970055SRussell King * since the network interface will not be up. 273273970055SRussell King */ 273373970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 273473970055SRussell King 273573970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 273673970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 273773970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 273873970055SRussell King sfp_set_state(sfp, sfp->state); 273973970055SRussell King sfp_module_tx_disable(sfp); 274073f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 274173f5e847SRussell King rtnl_lock(); 274273f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 274373f5e847SRussell King rtnl_unlock(); 274473f5e847SRussell King } 274573970055SRussell King 274673970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 274773970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 274873970055SRussell King continue; 274973970055SRussell King 2750257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 275196216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 275296216181SYueHaibing sfp->gpio_irq[i] = 0; 2753f3c9a666SRussell King sfp->need_poll = true; 275473970055SRussell King continue; 275573970055SRussell King } 275673970055SRussell King 27575411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 27585411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 2759f35cb547SRussell King (Oracle) gpio_names[i]); 27605411ca71SChris Healy 27618cb601f1SChris Healy if (!sfp_irq_name) 27628cb601f1SChris Healy return -ENOMEM; 27638cb601f1SChris Healy 2764257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2765257c2559SRobert Hancock NULL, sfp_irq, 276673970055SRussell King IRQF_ONESHOT | 276773970055SRussell King IRQF_TRIGGER_RISING | 276873970055SRussell King IRQF_TRIGGER_FALLING, 27695411ca71SChris Healy sfp_irq_name, sfp); 2770257c2559SRobert Hancock if (err) { 2771257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2772f3c9a666SRussell King sfp->need_poll = true; 277373970055SRussell King } 2774257c2559SRobert Hancock } 277573970055SRussell King 2776f3c9a666SRussell King if (sfp->need_poll) 277773970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 277873970055SRussell King 2779a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2780a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2781a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2782a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2783a1f5d1f0SAntoine Tenart */ 2784a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2785a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2786a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2787a1f5d1f0SAntoine Tenart 2788b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2789b5bfc21aSRussell King if (!sfp->sfp_bus) 2790b5bfc21aSRussell King return -ENOMEM; 2791b5bfc21aSRussell King 27929cc8976cSRussell King sfp_debugfs_init(sfp); 27939cc8976cSRussell King 279473970055SRussell King return 0; 279573970055SRussell King } 279673970055SRussell King 279773970055SRussell King static int sfp_remove(struct platform_device *pdev) 279873970055SRussell King { 279973970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 280073970055SRussell King 28019cc8976cSRussell King sfp_debugfs_exit(sfp); 280273970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 280373970055SRussell King 28040cb96b57SRussell King rtnl_lock(); 28050cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 28060cb96b57SRussell King rtnl_unlock(); 28070cb96b57SRussell King 280873970055SRussell King return 0; 280973970055SRussell King } 281073970055SRussell King 2811257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2812257c2559SRobert Hancock { 2813257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2814257c2559SRobert Hancock int i; 2815257c2559SRobert Hancock 2816257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2817257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2818257c2559SRobert Hancock continue; 2819257c2559SRobert Hancock 2820257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2821257c2559SRobert Hancock } 2822257c2559SRobert Hancock 2823257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2824257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2825257c2559SRobert Hancock } 2826257c2559SRobert Hancock 282773970055SRussell King static struct platform_driver sfp_driver = { 282873970055SRussell King .probe = sfp_probe, 282973970055SRussell King .remove = sfp_remove, 2830257c2559SRobert Hancock .shutdown = sfp_shutdown, 283173970055SRussell King .driver = { 283273970055SRussell King .name = "sfp", 283373970055SRussell King .of_match_table = sfp_of_match, 283473970055SRussell King }, 283573970055SRussell King }; 283673970055SRussell King 283773970055SRussell King static int sfp_init(void) 283873970055SRussell King { 283973970055SRussell King poll_jiffies = msecs_to_jiffies(100); 284073970055SRussell King 284173970055SRussell King return platform_driver_register(&sfp_driver); 284273970055SRussell King } 284373970055SRussell King module_init(sfp_init); 284473970055SRussell King 284573970055SRussell King static void sfp_exit(void) 284673970055SRussell King { 284773970055SRussell King platform_driver_unregister(&sfp_driver); 284873970055SRussell King } 284973970055SRussell King module_exit(sfp_exit); 285073970055SRussell King 285173970055SRussell King MODULE_ALIAS("platform:sfp"); 285273970055SRussell King MODULE_AUTHOR("Russell King"); 285373970055SRussell King MODULE_LICENSE("GPL v2"); 2854