1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 29cc8976cSRussell King #include <linux/debugfs.h> 373970055SRussell King #include <linux/delay.h> 454a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 51323061aSAndrew Lunn #include <linux/hwmon.h> 673970055SRussell King #include <linux/i2c.h> 773970055SRussell King #include <linux/interrupt.h> 873970055SRussell King #include <linux/jiffies.h> 9fcba68bdSAndrew Lunn #include <linux/mdio/mdio-i2c.h> 1073970055SRussell King #include <linux/module.h> 1173970055SRussell King #include <linux/mutex.h> 1273970055SRussell King #include <linux/of.h> 1373970055SRussell King #include <linux/phy.h> 1473970055SRussell King #include <linux/platform_device.h> 1573970055SRussell King #include <linux/rtnetlink.h> 1673970055SRussell King #include <linux/slab.h> 1773970055SRussell King #include <linux/workqueue.h> 1873970055SRussell King 1973970055SRussell King #include "sfp.h" 2073970055SRussell King #include "swphy.h" 2173970055SRussell King 2273970055SRussell King enum { 2373970055SRussell King GPIO_MODDEF0, 2473970055SRussell King GPIO_LOS, 2573970055SRussell King GPIO_TX_FAULT, 2673970055SRussell King GPIO_TX_DISABLE, 2773970055SRussell King GPIO_RATE_SELECT, 2873970055SRussell King GPIO_MAX, 2973970055SRussell King 3073970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3173970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3273970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3373970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3473970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3573970055SRussell King 3673970055SRussell King SFP_E_INSERT = 0, 3773970055SRussell King SFP_E_REMOVE, 386b0da5c9SRussell King SFP_E_DEV_ATTACH, 396b0da5c9SRussell King SFP_E_DEV_DETACH, 4073970055SRussell King SFP_E_DEV_DOWN, 4173970055SRussell King SFP_E_DEV_UP, 4273970055SRussell King SFP_E_TX_FAULT, 4373970055SRussell King SFP_E_TX_CLEAR, 4473970055SRussell King SFP_E_LOS_HIGH, 4573970055SRussell King SFP_E_LOS_LOW, 4673970055SRussell King SFP_E_TIMEOUT, 4773970055SRussell King 4873970055SRussell King SFP_MOD_EMPTY = 0, 4973f5e847SRussell King SFP_MOD_ERROR, 5073970055SRussell King SFP_MOD_PROBE, 5173f5e847SRussell King SFP_MOD_WAITDEV, 523bb35261SJon Nettleton SFP_MOD_HPOWER, 53b036a554SRussell King SFP_MOD_WAITPWR, 5473970055SRussell King SFP_MOD_PRESENT, 5573970055SRussell King 566b0da5c9SRussell King SFP_DEV_DETACHED = 0, 576b0da5c9SRussell King SFP_DEV_DOWN, 5873970055SRussell King SFP_DEV_UP, 5973970055SRussell King 6073970055SRussell King SFP_S_DOWN = 0, 6174c551caSRussell King SFP_S_FAIL, 62eefa6f1fSRussell King SFP_S_WAIT, 6373970055SRussell King SFP_S_INIT, 641cb89a14SRussell King SFP_S_INIT_PHY, 65d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6673970055SRussell King SFP_S_WAIT_LOS, 6773970055SRussell King SFP_S_LINK_UP, 6873970055SRussell King SFP_S_TX_FAULT, 6973970055SRussell King SFP_S_REINIT, 7073970055SRussell King SFP_S_TX_DISABLE, 7173970055SRussell King }; 7273970055SRussell King 734005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 744005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7573f5e847SRussell King [SFP_MOD_ERROR] = "error", 764005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7773f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 784005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 79b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 804005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 814005a7cbSAndrew Lunn }; 824005a7cbSAndrew Lunn 834005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 844005a7cbSAndrew Lunn { 854005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 864005a7cbSAndrew Lunn return "Unknown module state"; 874005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 884005a7cbSAndrew Lunn } 894005a7cbSAndrew Lunn 904005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 916b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 924005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 934005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 944005a7cbSAndrew Lunn }; 954005a7cbSAndrew Lunn 964005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 974005a7cbSAndrew Lunn { 984005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 994005a7cbSAndrew Lunn return "Unknown device state"; 1004005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1014005a7cbSAndrew Lunn } 1024005a7cbSAndrew Lunn 1034005a7cbSAndrew Lunn static const char * const event_strings[] = { 1044005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1054005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1066b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1076b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1084005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1094005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1104005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1114005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1124005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1134005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1144005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1154005a7cbSAndrew Lunn }; 1164005a7cbSAndrew Lunn 1174005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1184005a7cbSAndrew Lunn { 1194005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1204005a7cbSAndrew Lunn return "Unknown event"; 1214005a7cbSAndrew Lunn return event_strings[event]; 1224005a7cbSAndrew Lunn } 1234005a7cbSAndrew Lunn 1244005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1254005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 12674c551caSRussell King [SFP_S_FAIL] = "fail", 127eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1284005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1291cb89a14SRussell King [SFP_S_INIT_PHY] = "init_phy", 130d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1314005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1324005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1334005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1344005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 13525a9da66SSean Anderson [SFP_S_TX_DISABLE] = "tx_disable", 1364005a7cbSAndrew Lunn }; 1374005a7cbSAndrew Lunn 1384005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1394005a7cbSAndrew Lunn { 1404005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1414005a7cbSAndrew Lunn return "Unknown state"; 1424005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1434005a7cbSAndrew Lunn } 1444005a7cbSAndrew Lunn 145f35cb547SRussell King (Oracle) static const char *gpio_names[] = { 14625ee0793SBaruch Siach "mod-def0", 14773970055SRussell King "los", 14873970055SRussell King "tx-fault", 14973970055SRussell King "tx-disable", 15025ee0793SBaruch Siach "rate-select0", 15173970055SRussell King }; 15273970055SRussell King 15373970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15473970055SRussell King GPIOD_IN, 15573970055SRussell King GPIOD_IN, 15673970055SRussell King GPIOD_IN, 15773970055SRussell King GPIOD_ASIS, 15873970055SRussell King GPIOD_ASIS, 15973970055SRussell King }; 16073970055SRussell King 16126c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16226c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16326c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 16426c97a2dSRussell King * on board (for a copper SFP) time to initialise. 16526c97a2dSRussell King */ 166eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 167324e88cbSMarek Behún #define T_WAIT_ROLLBALL msecs_to_jiffies(25000) 16826c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 16926c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17026c97a2dSRussell King 17126c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17226c97a2dSRussell King * an indicated TX_FAULT. 17326c97a2dSRussell King */ 17473970055SRussell King #define T_RESET_US 10 17573970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 17673970055SRussell King 17765ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 17865ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 17965ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18065ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18165ef2d5cSRussell King */ 18265ef2d5cSRussell King #define N_FAULT_INIT 5 18365ef2d5cSRussell King #define N_FAULT 5 18465ef2d5cSRussell King 1851cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1861cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1871cb89a14SRussell King */ 1881cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1891cb89a14SRussell King #define R_PHY_RETRY 12 1901cb89a14SRussell King 19173970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19273970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19373970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 19473970055SRussell King * 195d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 196d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 19773970055SRussell King */ 198d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 1993bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 200e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 201e117be74SRussell King #define R_PROBE_RETRY_INIT 10 202e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 203e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 20473970055SRussell King 205516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 20673970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 207324e88cbSMarek Behún * RollBall SFPs access phy via SFP Enhanced Digital Diagnostic Interface 208324e88cbSMarek Behún * via address 0x51 (mdio-i2c will use RollBall protocol on this address). 20973970055SRussell King */ 21073970055SRussell King #define SFP_PHY_ADDR 22 211324e88cbSMarek Behún #define SFP_PHY_ADDR_ROLLBALL 17 21273970055SRussell King 213813c2dd7SIvan Bornyakov /* SFP_EEPROM_BLOCK_SIZE is the size of data chunk to read the EEPROM 214813c2dd7SIvan Bornyakov * at a time. Some SFP modules and also some Linux I2C drivers do not like 215813c2dd7SIvan Bornyakov * reads longer than 16 bytes. 216813c2dd7SIvan Bornyakov */ 217813c2dd7SIvan Bornyakov #define SFP_EEPROM_BLOCK_SIZE 16 218813c2dd7SIvan Bornyakov 219259c8618SRussell King struct sff_data { 220259c8618SRussell King unsigned int gpios; 221259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 222259c8618SRussell King }; 223259c8618SRussell King 22473970055SRussell King struct sfp { 22573970055SRussell King struct device *dev; 22673970055SRussell King struct i2c_adapter *i2c; 22773970055SRussell King struct mii_bus *i2c_mii; 22873970055SRussell King struct sfp_bus *sfp_bus; 229e85b1347SMarek Behún enum mdio_i2c_proto mdio_protocol; 23073970055SRussell King struct phy_device *mod_phy; 231259c8618SRussell King const struct sff_data *type; 2320d035bedSRussell King size_t i2c_block_size; 2333bb35261SJon Nettleton u32 max_power_mW; 23473970055SRussell King 23573970055SRussell King unsigned int (*get_state)(struct sfp *); 23673970055SRussell King void (*set_state)(struct sfp *, unsigned int); 23773970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2383bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 23973970055SRussell King 24073970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 241257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 24273970055SRussell King 243f3c9a666SRussell King bool need_poll; 244f3c9a666SRussell King 2451974fd3bSRussell King (Oracle) /* Access rules: 2461974fd3bSRussell King (Oracle) * state_hw_drive: st_mutex held 2471974fd3bSRussell King (Oracle) * state_hw_mask: st_mutex held 2481974fd3bSRussell King (Oracle) * state_soft_mask: st_mutex held 2491974fd3bSRussell King (Oracle) * state: st_mutex held unless reading input bits 2501974fd3bSRussell King (Oracle) */ 2512158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 2528475c4b7SRussell King (Oracle) unsigned int state_hw_mask; 253f3c9a666SRussell King unsigned int state_soft_mask; 25473970055SRussell King unsigned int state; 2551974fd3bSRussell King (Oracle) 25673970055SRussell King struct delayed_work poll; 25773970055SRussell King struct delayed_work timeout; 2582158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 25973970055SRussell King unsigned char sm_mod_state; 260e117be74SRussell King unsigned char sm_mod_tries_init; 261e117be74SRussell King unsigned char sm_mod_tries; 26273970055SRussell King unsigned char sm_dev_state; 26373970055SRussell King unsigned short sm_state; 264281e4eabSRussell King unsigned char sm_fault_retries; 2651cb89a14SRussell King unsigned char sm_phy_retries; 26673970055SRussell King 26773970055SRussell King struct sfp_eeprom_id id; 268ed32abb1SRussell King unsigned int module_power_mW; 26926c97a2dSRussell King unsigned int module_t_start_up; 270324e88cbSMarek Behún unsigned int module_t_wait; 271f94b9bedSRussell King (Oracle) 272f94b9bedSRussell King (Oracle) bool have_a2; 2732069624dSMatthew Hagan bool tx_fault_ignore; 274ed32abb1SRussell King 27523571c7bSRussell King (Oracle) const struct sfp_quirk *quirk; 27623571c7bSRussell King (Oracle) 2771323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2781323061aSAndrew Lunn struct sfp_diag diag; 279139d3a21SRussell King struct delayed_work hwmon_probe; 280139d3a21SRussell King unsigned int hwmon_tries; 2811323061aSAndrew Lunn struct device *hwmon_dev; 2821323061aSAndrew Lunn char *hwmon_name; 2831323061aSAndrew Lunn #endif 2841323061aSAndrew Lunn 2859cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2869cc8976cSRussell King struct dentry *debugfs_dir; 2879cc8976cSRussell King #endif 28873970055SRussell King }; 28973970055SRussell King 290259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 291259c8618SRussell King { 2920fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 293259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 294259c8618SRussell King } 295259c8618SRussell King 296259c8618SRussell King static const struct sff_data sff_data = { 297259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 298259c8618SRussell King .module_supported = sff_module_supported, 299259c8618SRussell King }; 300259c8618SRussell King 301259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 302259c8618SRussell King { 303f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 304f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 305f0b4f847SPali Rohár return true; 306f0b4f847SPali Rohár 307f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 308f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 309f0b4f847SPali Rohár * as supported based on vendor name and pn match. 310f0b4f847SPali Rohár */ 311f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 312f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 313f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 314f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 315f0b4f847SPali Rohár return true; 316f0b4f847SPali Rohár 317f0b4f847SPali Rohár return false; 318259c8618SRussell King } 319259c8618SRussell King 320259c8618SRussell King static const struct sff_data sfp_data = { 321259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 322259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 323259c8618SRussell King .module_supported = sfp_module_supported, 324259c8618SRussell King }; 325259c8618SRussell King 326259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 327259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 328259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 329259c8618SRussell King { }, 330259c8618SRussell King }; 331259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 332259c8618SRussell King 33327541675SRussell King (Oracle) static void sfp_fixup_long_startup(struct sfp *sfp) 33427541675SRussell King (Oracle) { 33527541675SRussell King (Oracle) sfp->module_t_start_up = T_START_UP_BAD_GPON; 33627541675SRussell King (Oracle) } 33727541675SRussell King (Oracle) 3385029be76SRussell King (Oracle) static void sfp_fixup_ignore_tx_fault(struct sfp *sfp) 3395029be76SRussell King (Oracle) { 3405029be76SRussell King (Oracle) sfp->tx_fault_ignore = true; 3415029be76SRussell King (Oracle) } 3425029be76SRussell King (Oracle) 34373472c83SRussell King (Oracle) static void sfp_fixup_halny_gsfp(struct sfp *sfp) 34473472c83SRussell King (Oracle) { 34573472c83SRussell King (Oracle) /* Ignore the TX_FAULT and LOS signals on this module. 34673472c83SRussell King (Oracle) * these are possibly used for other purposes on this 34773472c83SRussell King (Oracle) * module, e.g. a serial port. 34873472c83SRussell King (Oracle) */ 34973472c83SRussell King (Oracle) sfp->state_hw_mask &= ~(SFP_F_TX_FAULT | SFP_F_LOS); 35073472c83SRussell King (Oracle) } 35173472c83SRussell King (Oracle) 352324e88cbSMarek Behún static void sfp_fixup_rollball(struct sfp *sfp) 353324e88cbSMarek Behún { 354324e88cbSMarek Behún sfp->mdio_protocol = MDIO_I2C_ROLLBALL; 355324e88cbSMarek Behún sfp->module_t_wait = T_WAIT_ROLLBALL; 356324e88cbSMarek Behún } 357324e88cbSMarek Behún 358324e88cbSMarek Behún static void sfp_fixup_rollball_cc(struct sfp *sfp) 359324e88cbSMarek Behún { 360324e88cbSMarek Behún sfp_fixup_rollball(sfp); 361324e88cbSMarek Behún 362324e88cbSMarek Behún /* Some RollBall SFPs may have wrong (zero) extended compliance code 363324e88cbSMarek Behún * burned in EEPROM. For PHY probing we need the correct one. 364324e88cbSMarek Behún */ 365324e88cbSMarek Behún sfp->id.base.extended_cc = SFF8024_ECC_10GBASE_T_SFI; 366324e88cbSMarek Behún } 367324e88cbSMarek Behún 36823571c7bSRussell King (Oracle) static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id, 369fd580c98SRussell King unsigned long *modes, 370fd580c98SRussell King unsigned long *interfaces) 37123571c7bSRussell King (Oracle) { 37223571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, modes); 373fd580c98SRussell King __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 37423571c7bSRussell King (Oracle) } 37523571c7bSRussell King (Oracle) 37650e96acbSRussell King (Oracle) static void sfp_quirk_disable_autoneg(const struct sfp_eeprom_id *id, 37750e96acbSRussell King (Oracle) unsigned long *modes, 37850e96acbSRussell King (Oracle) unsigned long *interfaces) 37950e96acbSRussell King (Oracle) { 38050e96acbSRussell King (Oracle) linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, modes); 38150e96acbSRussell King (Oracle) } 38250e96acbSRussell King (Oracle) 38350e96acbSRussell King (Oracle) static void sfp_quirk_oem_2_5g(const struct sfp_eeprom_id *id, 38450e96acbSRussell King (Oracle) unsigned long *modes, 38550e96acbSRussell King (Oracle) unsigned long *interfaces) 38650e96acbSRussell King (Oracle) { 38750e96acbSRussell King (Oracle) /* Copper 2.5G SFP */ 38850e96acbSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, modes); 38950e96acbSRussell King (Oracle) __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); 39050e96acbSRussell King (Oracle) sfp_quirk_disable_autoneg(id, modes, interfaces); 39150e96acbSRussell King (Oracle) } 39250e96acbSRussell King (Oracle) 39323571c7bSRussell King (Oracle) static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id, 394fd580c98SRussell King unsigned long *modes, 395fd580c98SRussell King unsigned long *interfaces) 39623571c7bSRussell King (Oracle) { 39723571c7bSRussell King (Oracle) /* Ubiquiti U-Fiber Instant module claims that support all transceiver 39823571c7bSRussell King (Oracle) * types including 10G Ethernet which is not truth. So clear all claimed 39923571c7bSRussell King (Oracle) * modes and set only one mode which module supports: 1000baseX_Full. 40023571c7bSRussell King (Oracle) */ 40123571c7bSRussell King (Oracle) linkmode_zero(modes); 40223571c7bSRussell King (Oracle) linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, modes); 40323571c7bSRussell King (Oracle) } 40423571c7bSRussell King (Oracle) 40513c8adcfSMarek Behún #define SFP_QUIRK(_v, _p, _m, _f) \ 40613c8adcfSMarek Behún { .vendor = _v, .part = _p, .modes = _m, .fixup = _f, } 40713c8adcfSMarek Behún #define SFP_QUIRK_M(_v, _p, _m) SFP_QUIRK(_v, _p, _m, NULL) 40813c8adcfSMarek Behún #define SFP_QUIRK_F(_v, _p, _f) SFP_QUIRK(_v, _p, NULL, _f) 40913c8adcfSMarek Behún 41023571c7bSRussell King (Oracle) static const struct sfp_quirk sfp_quirks[] = { 41113c8adcfSMarek Behún // Alcatel Lucent G-010S-P can operate at 2500base-X, but incorrectly 41213c8adcfSMarek Behún // report 2500MBd NRZ in their EEPROM 41313c8adcfSMarek Behún SFP_QUIRK_M("ALCATELLUCENT", "G010SP", sfp_quirk_2500basex), 41413c8adcfSMarek Behún 41513c8adcfSMarek Behún // Alcatel Lucent G-010S-A can operate at 2500base-X, but report 3.2GBd 41623571c7bSRussell King (Oracle) // NRZ in their EEPROM 41713c8adcfSMarek Behún SFP_QUIRK("ALCATELLUCENT", "3FE46541AA", sfp_quirk_2500basex, 41813c8adcfSMarek Behún sfp_fixup_long_startup), 41913c8adcfSMarek Behún 42013c8adcfSMarek Behún SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp), 42113c8adcfSMarek Behún 422ad651d68SDaniel Golle // HG MXPD-483II-F 2.5G supports 2500Base-X, but incorrectly reports 423ad651d68SDaniel Golle // 2600MBd in their EERPOM 424ad651d68SDaniel Golle SFP_QUIRK_M("HG GENUINE", "MXPD-483II", sfp_quirk_2500basex), 425ad651d68SDaniel Golle 42613c8adcfSMarek Behún // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in 42713c8adcfSMarek Behún // their EEPROM 42813c8adcfSMarek Behún SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex, 42913c8adcfSMarek Behún sfp_fixup_ignore_tx_fault), 43013c8adcfSMarek Behún 43113c8adcfSMarek Behún // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report 43213c8adcfSMarek Behún // 2500MBd NRZ in their EEPROM 43313c8adcfSMarek Behún SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex), 43413c8adcfSMarek Behún 43513c8adcfSMarek Behún SFP_QUIRK_M("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant), 436324e88cbSMarek Behún 437324e88cbSMarek Behún SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc), 43850e96acbSRussell King (Oracle) SFP_QUIRK_M("OEM", "SFP-2.5G-T", sfp_quirk_oem_2_5g), 439324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc), 440324e88cbSMarek Behún SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc), 441324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), 442324e88cbSMarek Behún SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), 44323571c7bSRussell King (Oracle) }; 44423571c7bSRussell King (Oracle) 44523571c7bSRussell King (Oracle) static size_t sfp_strlen(const char *str, size_t maxlen) 44623571c7bSRussell King (Oracle) { 44723571c7bSRussell King (Oracle) size_t size, i; 44823571c7bSRussell King (Oracle) 44973472c83SRussell King (Oracle) /* Trailing characters should be filled with space chars, but 45073472c83SRussell King (Oracle) * some manufacturers can't read SFF-8472 and use NUL. 45173472c83SRussell King (Oracle) */ 45223571c7bSRussell King (Oracle) for (i = 0, size = 0; i < maxlen; i++) 45373472c83SRussell King (Oracle) if (str[i] != ' ' && str[i] != '\0') 45423571c7bSRussell King (Oracle) size = i + 1; 45523571c7bSRussell King (Oracle) 45623571c7bSRussell King (Oracle) return size; 45723571c7bSRussell King (Oracle) } 45823571c7bSRussell King (Oracle) 45923571c7bSRussell King (Oracle) static bool sfp_match(const char *qs, const char *str, size_t len) 46023571c7bSRussell King (Oracle) { 46123571c7bSRussell King (Oracle) if (!qs) 46223571c7bSRussell King (Oracle) return true; 46323571c7bSRussell King (Oracle) if (strlen(qs) != len) 46423571c7bSRussell King (Oracle) return false; 46523571c7bSRussell King (Oracle) return !strncmp(qs, str, len); 46623571c7bSRussell King (Oracle) } 46723571c7bSRussell King (Oracle) 46823571c7bSRussell King (Oracle) static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) 46923571c7bSRussell King (Oracle) { 47023571c7bSRussell King (Oracle) const struct sfp_quirk *q; 47123571c7bSRussell King (Oracle) unsigned int i; 47223571c7bSRussell King (Oracle) size_t vs, ps; 47323571c7bSRussell King (Oracle) 47423571c7bSRussell King (Oracle) vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); 47523571c7bSRussell King (Oracle) ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); 47623571c7bSRussell King (Oracle) 47723571c7bSRussell King (Oracle) for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) 47823571c7bSRussell King (Oracle) if (sfp_match(q->vendor, id->base.vendor_name, vs) && 47923571c7bSRussell King (Oracle) sfp_match(q->part, id->base.vendor_pn, ps)) 48023571c7bSRussell King (Oracle) return q; 48123571c7bSRussell King (Oracle) 48223571c7bSRussell King (Oracle) return NULL; 48323571c7bSRussell King (Oracle) } 48423571c7bSRussell King (Oracle) 48573970055SRussell King static unsigned long poll_jiffies; 48673970055SRussell King 48773970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 48873970055SRussell King { 48973970055SRussell King unsigned int i, state, v; 49073970055SRussell King 49173970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 49273970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 49373970055SRussell King continue; 49473970055SRussell King 49573970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 49673970055SRussell King if (v) 49773970055SRussell King state |= BIT(i); 49873970055SRussell King } 49973970055SRussell King 50073970055SRussell King return state; 50173970055SRussell King } 50273970055SRussell King 503259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 504259c8618SRussell King { 505259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 506259c8618SRussell King } 507259c8618SRussell King 50873970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 50973970055SRussell King { 51073970055SRussell King if (state & SFP_F_PRESENT) { 51173970055SRussell King /* If the module is present, drive the signals */ 51273970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 51373970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 51473970055SRussell King state & SFP_F_TX_DISABLE); 51573970055SRussell King if (state & SFP_F_RATE_SELECT) 51673970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 51773970055SRussell King state & SFP_F_RATE_SELECT); 51873970055SRussell King } else { 51973970055SRussell King /* Otherwise, let them float to the pull-ups */ 52073970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 52173970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 52273970055SRussell King if (state & SFP_F_RATE_SELECT) 52373970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 52473970055SRussell King } 52573970055SRussell King } 52673970055SRussell King 5273bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 5283bb35261SJon Nettleton size_t len) 52973970055SRussell King { 53073970055SRussell King struct i2c_msg msgs[2]; 531426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 532426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 53328e74a7cSRussell King size_t this_len; 53473970055SRussell King int ret; 53573970055SRussell King 53673970055SRussell King msgs[0].addr = bus_addr; 53773970055SRussell King msgs[0].flags = 0; 53873970055SRussell King msgs[0].len = 1; 53973970055SRussell King msgs[0].buf = &dev_addr; 54073970055SRussell King msgs[1].addr = bus_addr; 54173970055SRussell King msgs[1].flags = I2C_M_RD; 54273970055SRussell King msgs[1].len = len; 54373970055SRussell King msgs[1].buf = buf; 54473970055SRussell King 54528e74a7cSRussell King while (len) { 54628e74a7cSRussell King this_len = len; 5470d035bedSRussell King if (this_len > block_size) 5480d035bedSRussell King this_len = block_size; 54928e74a7cSRussell King 55028e74a7cSRussell King msgs[1].len = this_len; 55128e74a7cSRussell King 5523bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 55373970055SRussell King if (ret < 0) 55473970055SRussell King return ret; 55573970055SRussell King 55628e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 55728e74a7cSRussell King break; 55828e74a7cSRussell King 55928e74a7cSRussell King msgs[1].buf += this_len; 56028e74a7cSRussell King dev_addr += this_len; 56128e74a7cSRussell King len -= this_len; 56228e74a7cSRussell King } 56328e74a7cSRussell King 56428e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 56573970055SRussell King } 56673970055SRussell King 5673bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 56873970055SRussell King size_t len) 56973970055SRussell King { 5703bb35261SJon Nettleton struct i2c_msg msgs[1]; 5713bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 5723bb35261SJon Nettleton int ret; 5733bb35261SJon Nettleton 5743bb35261SJon Nettleton msgs[0].addr = bus_addr; 5753bb35261SJon Nettleton msgs[0].flags = 0; 5763bb35261SJon Nettleton msgs[0].len = 1 + len; 5773bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 5783bb35261SJon Nettleton if (!msgs[0].buf) 5793bb35261SJon Nettleton return -ENOMEM; 5803bb35261SJon Nettleton 5813bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 5823bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 5833bb35261SJon Nettleton 5843bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 5853bb35261SJon Nettleton 5863bb35261SJon Nettleton kfree(msgs[0].buf); 5873bb35261SJon Nettleton 5883bb35261SJon Nettleton if (ret < 0) 5893bb35261SJon Nettleton return ret; 5903bb35261SJon Nettleton 5913bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 59273970055SRussell King } 59373970055SRussell King 59473970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 59573970055SRussell King { 59673970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 59773970055SRussell King return -EINVAL; 59873970055SRussell King 59973970055SRussell King sfp->i2c = i2c; 60073970055SRussell King sfp->read = sfp_i2c_read; 6013bb35261SJon Nettleton sfp->write = sfp_i2c_write; 60273970055SRussell King 603e85b1347SMarek Behún return 0; 604e85b1347SMarek Behún } 605e85b1347SMarek Behún 606e85b1347SMarek Behún static int sfp_i2c_mdiobus_create(struct sfp *sfp) 607e85b1347SMarek Behún { 608e85b1347SMarek Behún struct mii_bus *i2c_mii; 609e85b1347SMarek Behún int ret; 610e85b1347SMarek Behún 61109bbedacSMarek Behún i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, sfp->mdio_protocol); 61273970055SRussell King if (IS_ERR(i2c_mii)) 61373970055SRussell King return PTR_ERR(i2c_mii); 61473970055SRussell King 61573970055SRussell King i2c_mii->name = "SFP I2C Bus"; 61673970055SRussell King i2c_mii->phy_mask = ~0; 61773970055SRussell King 61873970055SRussell King ret = mdiobus_register(i2c_mii); 61973970055SRussell King if (ret < 0) { 62073970055SRussell King mdiobus_free(i2c_mii); 62173970055SRussell King return ret; 62273970055SRussell King } 62373970055SRussell King 62473970055SRussell King sfp->i2c_mii = i2c_mii; 62573970055SRussell King 62673970055SRussell King return 0; 62773970055SRussell King } 62873970055SRussell King 629e85b1347SMarek Behún static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) 630e85b1347SMarek Behún { 631e85b1347SMarek Behún mdiobus_unregister(sfp->i2c_mii); 632e85b1347SMarek Behún sfp->i2c_mii = NULL; 633e85b1347SMarek Behún } 634e85b1347SMarek Behún 63573970055SRussell King /* Interface */ 63673970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 63773970055SRussell King { 63873970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 63973970055SRussell King } 64073970055SRussell King 6413bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 6423bb35261SJon Nettleton { 6433bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 6443bb35261SJon Nettleton } 6453bb35261SJon Nettleton 646a3c536fcSRussell King (Oracle) static int sfp_modify_u8(struct sfp *sfp, bool a2, u8 addr, u8 mask, u8 val) 647a3c536fcSRussell King (Oracle) { 648a3c536fcSRussell King (Oracle) int ret; 649a3c536fcSRussell King (Oracle) u8 old, v; 650a3c536fcSRussell King (Oracle) 651a3c536fcSRussell King (Oracle) ret = sfp_read(sfp, a2, addr, &old, sizeof(old)); 652a3c536fcSRussell King (Oracle) if (ret != sizeof(old)) 653a3c536fcSRussell King (Oracle) return ret; 654a3c536fcSRussell King (Oracle) 655a3c536fcSRussell King (Oracle) v = (old & ~mask) | (val & mask); 656a3c536fcSRussell King (Oracle) if (v == old) 657a3c536fcSRussell King (Oracle) return sizeof(v); 658a3c536fcSRussell King (Oracle) 659a3c536fcSRussell King (Oracle) return sfp_write(sfp, a2, addr, &v, sizeof(v)); 660a3c536fcSRussell King (Oracle) } 661a3c536fcSRussell King (Oracle) 662f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 663f3c9a666SRussell King { 664f3c9a666SRussell King unsigned int state = 0; 665f3c9a666SRussell King u8 status; 6660dea4d03SRussell King int ret; 667f3c9a666SRussell King 6680dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 6690dea4d03SRussell King if (ret == sizeof(status)) { 670f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 671f3c9a666SRussell King state |= SFP_F_LOS; 672f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 673f3c9a666SRussell King state |= SFP_F_TX_FAULT; 6740dea4d03SRussell King } else { 6750dea4d03SRussell King dev_err_ratelimited(sfp->dev, 6769ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 6779ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 6780dea4d03SRussell King /* Preserve the current state */ 6790dea4d03SRussell King state = sfp->state; 680f3c9a666SRussell King } 681f3c9a666SRussell King 682f3c9a666SRussell King return state & sfp->state_soft_mask; 683f3c9a666SRussell King } 684f3c9a666SRussell King 685f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 686f3c9a666SRussell King { 687a3c536fcSRussell King (Oracle) u8 mask = SFP_STATUS_TX_DISABLE_FORCE; 688a3c536fcSRussell King (Oracle) u8 val = 0; 689f3c9a666SRussell King 690f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 691a3c536fcSRussell King (Oracle) val |= SFP_STATUS_TX_DISABLE_FORCE; 692f3c9a666SRussell King 693a3c536fcSRussell King (Oracle) 694a3c536fcSRussell King (Oracle) sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); 695f3c9a666SRussell King } 696f3c9a666SRussell King 697f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 698f3c9a666SRussell King { 699f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 7008475c4b7SRussell King (Oracle) unsigned int mask = 0; 701f3c9a666SRussell King 7028475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 7038475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 7048475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 7058475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 7068475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 7078475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 7088475c4b7SRussell King (Oracle) 7091974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 7108475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 7118475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 712f3c9a666SRussell King 713f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 714f3c9a666SRussell King !sfp->need_poll) 715f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 7161974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 717f3c9a666SRussell King } 718f3c9a666SRussell King 719f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 720f3c9a666SRussell King { 7211974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 722f3c9a666SRussell King sfp->state_soft_mask = 0; 7231974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 724f3c9a666SRussell King } 725f3c9a666SRussell King 7261974fd3bSRussell King (Oracle) /* sfp_get_state() - must be called with st_mutex held, or in the 7271974fd3bSRussell King (Oracle) * initialisation path. 7281974fd3bSRussell King (Oracle) */ 729f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 730f3c9a666SRussell King { 7318475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 7328475c4b7SRussell King (Oracle) unsigned int state; 733f3c9a666SRussell King 7348475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 7358475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 736f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 737f3c9a666SRussell King 738f3c9a666SRussell King return state; 739f3c9a666SRussell King } 740f3c9a666SRussell King 7411974fd3bSRussell King (Oracle) /* sfp_set_state() - must be called with st_mutex held, or in the 7421974fd3bSRussell King (Oracle) * initialisation path. 7431974fd3bSRussell King (Oracle) */ 744f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 745f3c9a666SRussell King { 746f3c9a666SRussell King sfp->set_state(sfp, state); 747f3c9a666SRussell King 748f3c9a666SRussell King if (state & SFP_F_PRESENT && 749f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 750f3c9a666SRussell King sfp_soft_set_state(sfp, state); 751f3c9a666SRussell King } 752f3c9a666SRussell King 753418c1214SRussell King (Oracle) static void sfp_mod_state(struct sfp *sfp, unsigned int mask, unsigned int set) 754418c1214SRussell King (Oracle) { 7551974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 756418c1214SRussell King (Oracle) sfp->state = (sfp->state & ~mask) | set; 757418c1214SRussell King (Oracle) sfp_set_state(sfp, sfp->state); 7581974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 759418c1214SRussell King (Oracle) } 760418c1214SRussell King (Oracle) 76173970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 76273970055SRussell King { 76373970055SRussell King u8 *p, check; 76473970055SRussell King 76573970055SRussell King for (p = buf, check = 0; len; p++, len--) 76673970055SRussell King check += *p; 76773970055SRussell King 76873970055SRussell King return check; 76973970055SRussell King } 77073970055SRussell King 7711323061aSAndrew Lunn /* hwmon */ 7721323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 7731323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 7741323061aSAndrew Lunn enum hwmon_sensor_types type, 7751323061aSAndrew Lunn u32 attr, int channel) 7761323061aSAndrew Lunn { 7771323061aSAndrew Lunn const struct sfp *sfp = data; 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn switch (type) { 7801323061aSAndrew Lunn case hwmon_temp: 7811323061aSAndrew Lunn switch (attr) { 7821323061aSAndrew Lunn case hwmon_temp_min_alarm: 7831323061aSAndrew Lunn case hwmon_temp_max_alarm: 7841323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7851323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7861323061aSAndrew Lunn case hwmon_temp_min: 7871323061aSAndrew Lunn case hwmon_temp_max: 7881323061aSAndrew Lunn case hwmon_temp_lcrit: 7891323061aSAndrew Lunn case hwmon_temp_crit: 790a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 791a33710bdSAndrew Lunn return 0; 792df561f66SGustavo A. R. Silva fallthrough; 793a33710bdSAndrew Lunn case hwmon_temp_input: 794c1236979SAndrew Lunn case hwmon_temp_label: 7951323061aSAndrew Lunn return 0444; 7961323061aSAndrew Lunn default: 7971323061aSAndrew Lunn return 0; 7981323061aSAndrew Lunn } 7991323061aSAndrew Lunn case hwmon_in: 8001323061aSAndrew Lunn switch (attr) { 8011323061aSAndrew Lunn case hwmon_in_min_alarm: 8021323061aSAndrew Lunn case hwmon_in_max_alarm: 8031323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8041323061aSAndrew Lunn case hwmon_in_crit_alarm: 8051323061aSAndrew Lunn case hwmon_in_min: 8061323061aSAndrew Lunn case hwmon_in_max: 8071323061aSAndrew Lunn case hwmon_in_lcrit: 8081323061aSAndrew Lunn case hwmon_in_crit: 809a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 810a33710bdSAndrew Lunn return 0; 811df561f66SGustavo A. R. Silva fallthrough; 812a33710bdSAndrew Lunn case hwmon_in_input: 813c1236979SAndrew Lunn case hwmon_in_label: 8141323061aSAndrew Lunn return 0444; 8151323061aSAndrew Lunn default: 8161323061aSAndrew Lunn return 0; 8171323061aSAndrew Lunn } 8181323061aSAndrew Lunn case hwmon_curr: 8191323061aSAndrew Lunn switch (attr) { 8201323061aSAndrew Lunn case hwmon_curr_min_alarm: 8211323061aSAndrew Lunn case hwmon_curr_max_alarm: 8221323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 8231323061aSAndrew Lunn case hwmon_curr_crit_alarm: 8241323061aSAndrew Lunn case hwmon_curr_min: 8251323061aSAndrew Lunn case hwmon_curr_max: 8261323061aSAndrew Lunn case hwmon_curr_lcrit: 8271323061aSAndrew Lunn case hwmon_curr_crit: 828a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 829a33710bdSAndrew Lunn return 0; 830df561f66SGustavo A. R. Silva fallthrough; 831a33710bdSAndrew Lunn case hwmon_curr_input: 832c1236979SAndrew Lunn case hwmon_curr_label: 8331323061aSAndrew Lunn return 0444; 8341323061aSAndrew Lunn default: 8351323061aSAndrew Lunn return 0; 8361323061aSAndrew Lunn } 8371323061aSAndrew Lunn case hwmon_power: 8381323061aSAndrew Lunn /* External calibration of receive power requires 8391323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 8401323061aSAndrew Lunn * is not easy, so just skip it. If the module does 8411323061aSAndrew Lunn * not require external calibration, we can however 8421323061aSAndrew Lunn * show receiver power, since FP is then not needed. 8431323061aSAndrew Lunn */ 8441323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 8451323061aSAndrew Lunn channel == 1) 8461323061aSAndrew Lunn return 0; 8471323061aSAndrew Lunn switch (attr) { 8481323061aSAndrew Lunn case hwmon_power_min_alarm: 8491323061aSAndrew Lunn case hwmon_power_max_alarm: 8501323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 8511323061aSAndrew Lunn case hwmon_power_crit_alarm: 8521323061aSAndrew Lunn case hwmon_power_min: 8531323061aSAndrew Lunn case hwmon_power_max: 8541323061aSAndrew Lunn case hwmon_power_lcrit: 8551323061aSAndrew Lunn case hwmon_power_crit: 856a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 857a33710bdSAndrew Lunn return 0; 858df561f66SGustavo A. R. Silva fallthrough; 859a33710bdSAndrew Lunn case hwmon_power_input: 860c1236979SAndrew Lunn case hwmon_power_label: 8611323061aSAndrew Lunn return 0444; 8621323061aSAndrew Lunn default: 8631323061aSAndrew Lunn return 0; 8641323061aSAndrew Lunn } 8651323061aSAndrew Lunn default: 8661323061aSAndrew Lunn return 0; 8671323061aSAndrew Lunn } 8681323061aSAndrew Lunn } 8691323061aSAndrew Lunn 8701323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 8711323061aSAndrew Lunn { 8721323061aSAndrew Lunn __be16 val; 8731323061aSAndrew Lunn int err; 8741323061aSAndrew Lunn 8751323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 8761323061aSAndrew Lunn if (err < 0) 8771323061aSAndrew Lunn return err; 8781323061aSAndrew Lunn 8791323061aSAndrew Lunn *value = be16_to_cpu(val); 8801323061aSAndrew Lunn 8811323061aSAndrew Lunn return 0; 8821323061aSAndrew Lunn } 8831323061aSAndrew Lunn 8841323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 8851323061aSAndrew Lunn { 8860cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 8871323061aSAndrew Lunn } 8881323061aSAndrew Lunn 8891323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 8901323061aSAndrew Lunn long *value) 8911323061aSAndrew Lunn { 8921323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 8931323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 8941323061aSAndrew Lunn } 8951323061aSAndrew Lunn 8961323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 8971323061aSAndrew Lunn { 8981323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 8991323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 9001323061aSAndrew Lunn 9011323061aSAndrew Lunn if (*value >= 0x8000) 9021323061aSAndrew Lunn *value -= 0x10000; 9031323061aSAndrew Lunn 9041323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 9051323061aSAndrew Lunn } 9061323061aSAndrew Lunn 9071323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 9081323061aSAndrew Lunn { 9091323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 9101323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 9111323061aSAndrew Lunn 9121323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9131323061aSAndrew Lunn } 9141323061aSAndrew Lunn 9151323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 9161323061aSAndrew Lunn { 9171323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 9181323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 9191323061aSAndrew Lunn 9201323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 9211323061aSAndrew Lunn } 9221323061aSAndrew Lunn 9231323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 9241323061aSAndrew Lunn { 9251323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 9261323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 9271323061aSAndrew Lunn 9281323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 9291323061aSAndrew Lunn } 9301323061aSAndrew Lunn 9311323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 9321323061aSAndrew Lunn { 9331323061aSAndrew Lunn int err; 9341323061aSAndrew Lunn 9351323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9361323061aSAndrew Lunn if (err < 0) 9371323061aSAndrew Lunn return err; 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 9401323061aSAndrew Lunn 9411323061aSAndrew Lunn return 0; 9421323061aSAndrew Lunn } 9431323061aSAndrew Lunn 9441323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 9451323061aSAndrew Lunn { 9461323061aSAndrew Lunn int err; 9471323061aSAndrew Lunn 9481323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9491323061aSAndrew Lunn if (err < 0) 9501323061aSAndrew Lunn return err; 9511323061aSAndrew Lunn 9521323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 9531323061aSAndrew Lunn 9541323061aSAndrew Lunn return 0; 9551323061aSAndrew Lunn } 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 9581323061aSAndrew Lunn { 9591323061aSAndrew Lunn int err; 9601323061aSAndrew Lunn 9611323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9621323061aSAndrew Lunn if (err < 0) 9631323061aSAndrew Lunn return err; 9641323061aSAndrew Lunn 9651323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9661323061aSAndrew Lunn 9671323061aSAndrew Lunn return 0; 9681323061aSAndrew Lunn } 9691323061aSAndrew Lunn 9701323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 9711323061aSAndrew Lunn { 9721323061aSAndrew Lunn int err; 9731323061aSAndrew Lunn 9741323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9751323061aSAndrew Lunn if (err < 0) 9761323061aSAndrew Lunn return err; 9771323061aSAndrew Lunn 9781323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9791323061aSAndrew Lunn 9801323061aSAndrew Lunn return 0; 9811323061aSAndrew Lunn } 9821323061aSAndrew Lunn 9831323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 9841323061aSAndrew Lunn { 9851323061aSAndrew Lunn int err; 9861323061aSAndrew Lunn 9871323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 9881323061aSAndrew Lunn if (err < 0) 9891323061aSAndrew Lunn return err; 9901323061aSAndrew Lunn 9911323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn return 0; 9941323061aSAndrew Lunn } 9951323061aSAndrew Lunn 9961323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 9971323061aSAndrew Lunn { 9981323061aSAndrew Lunn u8 status; 9991323061aSAndrew Lunn int err; 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn switch (attr) { 10021323061aSAndrew Lunn case hwmon_temp_input: 10031323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 10041323061aSAndrew Lunn 10051323061aSAndrew Lunn case hwmon_temp_lcrit: 10061323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 10071323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10081323061aSAndrew Lunn return 0; 10091323061aSAndrew Lunn 10101323061aSAndrew Lunn case hwmon_temp_min: 10111323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 10121323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10131323061aSAndrew Lunn return 0; 10141323061aSAndrew Lunn case hwmon_temp_max: 10151323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 10161323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10171323061aSAndrew Lunn return 0; 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn case hwmon_temp_crit: 10201323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 10211323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 10221323061aSAndrew Lunn return 0; 10231323061aSAndrew Lunn 10241323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 10251323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10261323061aSAndrew Lunn if (err < 0) 10271323061aSAndrew Lunn return err; 10281323061aSAndrew Lunn 10291323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 10301323061aSAndrew Lunn return 0; 10311323061aSAndrew Lunn 10321323061aSAndrew Lunn case hwmon_temp_min_alarm: 10331323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10341323061aSAndrew Lunn if (err < 0) 10351323061aSAndrew Lunn return err; 10361323061aSAndrew Lunn 10371323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 10381323061aSAndrew Lunn return 0; 10391323061aSAndrew Lunn 10401323061aSAndrew Lunn case hwmon_temp_max_alarm: 10411323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10421323061aSAndrew Lunn if (err < 0) 10431323061aSAndrew Lunn return err; 10441323061aSAndrew Lunn 10451323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 10461323061aSAndrew Lunn return 0; 10471323061aSAndrew Lunn 10481323061aSAndrew Lunn case hwmon_temp_crit_alarm: 10491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10501323061aSAndrew Lunn if (err < 0) 10511323061aSAndrew Lunn return err; 10521323061aSAndrew Lunn 10531323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 10541323061aSAndrew Lunn return 0; 10551323061aSAndrew Lunn default: 10561323061aSAndrew Lunn return -EOPNOTSUPP; 10571323061aSAndrew Lunn } 10581323061aSAndrew Lunn 10591323061aSAndrew Lunn return -EOPNOTSUPP; 10601323061aSAndrew Lunn } 10611323061aSAndrew Lunn 10621323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 10631323061aSAndrew Lunn { 10641323061aSAndrew Lunn u8 status; 10651323061aSAndrew Lunn int err; 10661323061aSAndrew Lunn 10671323061aSAndrew Lunn switch (attr) { 10681323061aSAndrew Lunn case hwmon_in_input: 10691323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 10701323061aSAndrew Lunn 10711323061aSAndrew Lunn case hwmon_in_lcrit: 10721323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 10731323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10741323061aSAndrew Lunn return 0; 10751323061aSAndrew Lunn 10761323061aSAndrew Lunn case hwmon_in_min: 10771323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 10781323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10791323061aSAndrew Lunn return 0; 10801323061aSAndrew Lunn 10811323061aSAndrew Lunn case hwmon_in_max: 10821323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 10831323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10841323061aSAndrew Lunn return 0; 10851323061aSAndrew Lunn 10861323061aSAndrew Lunn case hwmon_in_crit: 10871323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 10881323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 10891323061aSAndrew Lunn return 0; 10901323061aSAndrew Lunn 10911323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 10921323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10931323061aSAndrew Lunn if (err < 0) 10941323061aSAndrew Lunn return err; 10951323061aSAndrew Lunn 10961323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 10971323061aSAndrew Lunn return 0; 10981323061aSAndrew Lunn 10991323061aSAndrew Lunn case hwmon_in_min_alarm: 11001323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11011323061aSAndrew Lunn if (err < 0) 11021323061aSAndrew Lunn return err; 11031323061aSAndrew Lunn 11041323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 11051323061aSAndrew Lunn return 0; 11061323061aSAndrew Lunn 11071323061aSAndrew Lunn case hwmon_in_max_alarm: 11081323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11091323061aSAndrew Lunn if (err < 0) 11101323061aSAndrew Lunn return err; 11111323061aSAndrew Lunn 11121323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 11131323061aSAndrew Lunn return 0; 11141323061aSAndrew Lunn 11151323061aSAndrew Lunn case hwmon_in_crit_alarm: 11161323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11171323061aSAndrew Lunn if (err < 0) 11181323061aSAndrew Lunn return err; 11191323061aSAndrew Lunn 11201323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 11211323061aSAndrew Lunn return 0; 11221323061aSAndrew Lunn default: 11231323061aSAndrew Lunn return -EOPNOTSUPP; 11241323061aSAndrew Lunn } 11251323061aSAndrew Lunn 11261323061aSAndrew Lunn return -EOPNOTSUPP; 11271323061aSAndrew Lunn } 11281323061aSAndrew Lunn 11291323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 11301323061aSAndrew Lunn { 11311323061aSAndrew Lunn u8 status; 11321323061aSAndrew Lunn int err; 11331323061aSAndrew Lunn 11341323061aSAndrew Lunn switch (attr) { 11351323061aSAndrew Lunn case hwmon_curr_input: 11361323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 11371323061aSAndrew Lunn 11381323061aSAndrew Lunn case hwmon_curr_lcrit: 11391323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 11401323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11411323061aSAndrew Lunn return 0; 11421323061aSAndrew Lunn 11431323061aSAndrew Lunn case hwmon_curr_min: 11441323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 11451323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11461323061aSAndrew Lunn return 0; 11471323061aSAndrew Lunn 11481323061aSAndrew Lunn case hwmon_curr_max: 11491323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 11501323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11511323061aSAndrew Lunn return 0; 11521323061aSAndrew Lunn 11531323061aSAndrew Lunn case hwmon_curr_crit: 11541323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 11551323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 11561323061aSAndrew Lunn return 0; 11571323061aSAndrew Lunn 11581323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 11591323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11601323061aSAndrew Lunn if (err < 0) 11611323061aSAndrew Lunn return err; 11621323061aSAndrew Lunn 11631323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 11641323061aSAndrew Lunn return 0; 11651323061aSAndrew Lunn 11661323061aSAndrew Lunn case hwmon_curr_min_alarm: 11671323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11681323061aSAndrew Lunn if (err < 0) 11691323061aSAndrew Lunn return err; 11701323061aSAndrew Lunn 11711323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 11721323061aSAndrew Lunn return 0; 11731323061aSAndrew Lunn 11741323061aSAndrew Lunn case hwmon_curr_max_alarm: 11751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 11761323061aSAndrew Lunn if (err < 0) 11771323061aSAndrew Lunn return err; 11781323061aSAndrew Lunn 11791323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 11801323061aSAndrew Lunn return 0; 11811323061aSAndrew Lunn 11821323061aSAndrew Lunn case hwmon_curr_crit_alarm: 11831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 11841323061aSAndrew Lunn if (err < 0) 11851323061aSAndrew Lunn return err; 11861323061aSAndrew Lunn 11871323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 11881323061aSAndrew Lunn return 0; 11891323061aSAndrew Lunn default: 11901323061aSAndrew Lunn return -EOPNOTSUPP; 11911323061aSAndrew Lunn } 11921323061aSAndrew Lunn 11931323061aSAndrew Lunn return -EOPNOTSUPP; 11941323061aSAndrew Lunn } 11951323061aSAndrew Lunn 11961323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 11971323061aSAndrew Lunn { 11981323061aSAndrew Lunn u8 status; 11991323061aSAndrew Lunn int err; 12001323061aSAndrew Lunn 12011323061aSAndrew Lunn switch (attr) { 12021323061aSAndrew Lunn case hwmon_power_input: 12031323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 12041323061aSAndrew Lunn 12051323061aSAndrew Lunn case hwmon_power_lcrit: 12061323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 12071323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12081323061aSAndrew Lunn return 0; 12091323061aSAndrew Lunn 12101323061aSAndrew Lunn case hwmon_power_min: 12111323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 12121323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12131323061aSAndrew Lunn return 0; 12141323061aSAndrew Lunn 12151323061aSAndrew Lunn case hwmon_power_max: 12161323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 12171323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12181323061aSAndrew Lunn return 0; 12191323061aSAndrew Lunn 12201323061aSAndrew Lunn case hwmon_power_crit: 12211323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 12221323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 12231323061aSAndrew Lunn return 0; 12241323061aSAndrew Lunn 12251323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12261323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12271323061aSAndrew Lunn if (err < 0) 12281323061aSAndrew Lunn return err; 12291323061aSAndrew Lunn 12301323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 12311323061aSAndrew Lunn return 0; 12321323061aSAndrew Lunn 12331323061aSAndrew Lunn case hwmon_power_min_alarm: 12341323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12351323061aSAndrew Lunn if (err < 0) 12361323061aSAndrew Lunn return err; 12371323061aSAndrew Lunn 12381323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 12391323061aSAndrew Lunn return 0; 12401323061aSAndrew Lunn 12411323061aSAndrew Lunn case hwmon_power_max_alarm: 12421323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 12431323061aSAndrew Lunn if (err < 0) 12441323061aSAndrew Lunn return err; 12451323061aSAndrew Lunn 12461323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 12471323061aSAndrew Lunn return 0; 12481323061aSAndrew Lunn 12491323061aSAndrew Lunn case hwmon_power_crit_alarm: 12501323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 12511323061aSAndrew Lunn if (err < 0) 12521323061aSAndrew Lunn return err; 12531323061aSAndrew Lunn 12541323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 12551323061aSAndrew Lunn return 0; 12561323061aSAndrew Lunn default: 12571323061aSAndrew Lunn return -EOPNOTSUPP; 12581323061aSAndrew Lunn } 12591323061aSAndrew Lunn 12601323061aSAndrew Lunn return -EOPNOTSUPP; 12611323061aSAndrew Lunn } 12621323061aSAndrew Lunn 12631323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 12641323061aSAndrew Lunn { 12651323061aSAndrew Lunn u8 status; 12661323061aSAndrew Lunn int err; 12671323061aSAndrew Lunn 12681323061aSAndrew Lunn switch (attr) { 12691323061aSAndrew Lunn case hwmon_power_input: 12701323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 12711323061aSAndrew Lunn 12721323061aSAndrew Lunn case hwmon_power_lcrit: 12731323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 12741323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12751323061aSAndrew Lunn return 0; 12761323061aSAndrew Lunn 12771323061aSAndrew Lunn case hwmon_power_min: 12781323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 12791323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12801323061aSAndrew Lunn return 0; 12811323061aSAndrew Lunn 12821323061aSAndrew Lunn case hwmon_power_max: 12831323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 12841323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12851323061aSAndrew Lunn return 0; 12861323061aSAndrew Lunn 12871323061aSAndrew Lunn case hwmon_power_crit: 12881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 12891323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 12901323061aSAndrew Lunn return 0; 12911323061aSAndrew Lunn 12921323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 12931323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 12941323061aSAndrew Lunn if (err < 0) 12951323061aSAndrew Lunn return err; 12961323061aSAndrew Lunn 12971323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 12981323061aSAndrew Lunn return 0; 12991323061aSAndrew Lunn 13001323061aSAndrew Lunn case hwmon_power_min_alarm: 13011323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 13021323061aSAndrew Lunn if (err < 0) 13031323061aSAndrew Lunn return err; 13041323061aSAndrew Lunn 13051323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 13061323061aSAndrew Lunn return 0; 13071323061aSAndrew Lunn 13081323061aSAndrew Lunn case hwmon_power_max_alarm: 13091323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 13101323061aSAndrew Lunn if (err < 0) 13111323061aSAndrew Lunn return err; 13121323061aSAndrew Lunn 13131323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 13141323061aSAndrew Lunn return 0; 13151323061aSAndrew Lunn 13161323061aSAndrew Lunn case hwmon_power_crit_alarm: 13171323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 13181323061aSAndrew Lunn if (err < 0) 13191323061aSAndrew Lunn return err; 13201323061aSAndrew Lunn 13211323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 13221323061aSAndrew Lunn return 0; 13231323061aSAndrew Lunn default: 13241323061aSAndrew Lunn return -EOPNOTSUPP; 13251323061aSAndrew Lunn } 13261323061aSAndrew Lunn 13271323061aSAndrew Lunn return -EOPNOTSUPP; 13281323061aSAndrew Lunn } 13291323061aSAndrew Lunn 13301323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 13311323061aSAndrew Lunn u32 attr, int channel, long *value) 13321323061aSAndrew Lunn { 13331323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 13341323061aSAndrew Lunn 13351323061aSAndrew Lunn switch (type) { 13361323061aSAndrew Lunn case hwmon_temp: 13371323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 13381323061aSAndrew Lunn case hwmon_in: 13391323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 13401323061aSAndrew Lunn case hwmon_curr: 13411323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 13421323061aSAndrew Lunn case hwmon_power: 13431323061aSAndrew Lunn switch (channel) { 13441323061aSAndrew Lunn case 0: 13451323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 13461323061aSAndrew Lunn case 1: 13471323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 13481323061aSAndrew Lunn default: 13491323061aSAndrew Lunn return -EOPNOTSUPP; 13501323061aSAndrew Lunn } 13511323061aSAndrew Lunn default: 13521323061aSAndrew Lunn return -EOPNOTSUPP; 13531323061aSAndrew Lunn } 13541323061aSAndrew Lunn } 13551323061aSAndrew Lunn 1356c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1357c1236979SAndrew Lunn "TX_power", 1358c1236979SAndrew Lunn "RX_power", 1359c1236979SAndrew Lunn }; 1360c1236979SAndrew Lunn 1361c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1362c1236979SAndrew Lunn enum hwmon_sensor_types type, 1363c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1364c1236979SAndrew Lunn { 1365c1236979SAndrew Lunn switch (type) { 1366c1236979SAndrew Lunn case hwmon_curr: 1367c1236979SAndrew Lunn switch (attr) { 1368c1236979SAndrew Lunn case hwmon_curr_label: 1369c1236979SAndrew Lunn *str = "bias"; 1370c1236979SAndrew Lunn return 0; 1371c1236979SAndrew Lunn default: 1372c1236979SAndrew Lunn return -EOPNOTSUPP; 1373c1236979SAndrew Lunn } 1374c1236979SAndrew Lunn break; 1375c1236979SAndrew Lunn case hwmon_temp: 1376c1236979SAndrew Lunn switch (attr) { 1377c1236979SAndrew Lunn case hwmon_temp_label: 1378c1236979SAndrew Lunn *str = "temperature"; 1379c1236979SAndrew Lunn return 0; 1380c1236979SAndrew Lunn default: 1381c1236979SAndrew Lunn return -EOPNOTSUPP; 1382c1236979SAndrew Lunn } 1383c1236979SAndrew Lunn break; 1384c1236979SAndrew Lunn case hwmon_in: 1385c1236979SAndrew Lunn switch (attr) { 1386c1236979SAndrew Lunn case hwmon_in_label: 1387c1236979SAndrew Lunn *str = "VCC"; 1388c1236979SAndrew Lunn return 0; 1389c1236979SAndrew Lunn default: 1390c1236979SAndrew Lunn return -EOPNOTSUPP; 1391c1236979SAndrew Lunn } 1392c1236979SAndrew Lunn break; 1393c1236979SAndrew Lunn case hwmon_power: 1394c1236979SAndrew Lunn switch (attr) { 1395c1236979SAndrew Lunn case hwmon_power_label: 1396c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1397c1236979SAndrew Lunn return 0; 1398c1236979SAndrew Lunn default: 1399c1236979SAndrew Lunn return -EOPNOTSUPP; 1400c1236979SAndrew Lunn } 1401c1236979SAndrew Lunn break; 1402c1236979SAndrew Lunn default: 1403c1236979SAndrew Lunn return -EOPNOTSUPP; 1404c1236979SAndrew Lunn } 1405c1236979SAndrew Lunn 1406c1236979SAndrew Lunn return -EOPNOTSUPP; 1407c1236979SAndrew Lunn } 1408c1236979SAndrew Lunn 14091323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 14101323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 14111323061aSAndrew Lunn .read = sfp_hwmon_read, 1412c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 14131323061aSAndrew Lunn }; 14141323061aSAndrew Lunn 1415490fde26SKrzysztof Kozlowski static const struct hwmon_channel_info * const sfp_hwmon_info[] = { 1416815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1417815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1418815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 14191323061aSAndrew Lunn HWMON_I_INPUT | 14201323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 14211323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 14221323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1423c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1424815f5f57SBeniamin Sandu HWMON_I_LABEL), 1425815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1426815f5f57SBeniamin Sandu HWMON_T_INPUT | 1427815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1428815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1429815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1430815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1431815f5f57SBeniamin Sandu HWMON_T_LABEL), 1432815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 14331323061aSAndrew Lunn HWMON_C_INPUT | 14341323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 14351323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 14361323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1437c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1438815f5f57SBeniamin Sandu HWMON_C_LABEL), 1439815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 14401323061aSAndrew Lunn /* Transmit power */ 14411323061aSAndrew Lunn HWMON_P_INPUT | 14421323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 14431323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 14441323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1445c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1446c1236979SAndrew Lunn HWMON_P_LABEL, 14471323061aSAndrew Lunn /* Receive power */ 14481323061aSAndrew Lunn HWMON_P_INPUT | 14491323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 14501323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 14511323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1452c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1453815f5f57SBeniamin Sandu HWMON_P_LABEL), 14541323061aSAndrew Lunn NULL, 14551323061aSAndrew Lunn }; 14561323061aSAndrew Lunn 14571323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 14581323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 14591323061aSAndrew Lunn .info = sfp_hwmon_info, 14601323061aSAndrew Lunn }; 14611323061aSAndrew Lunn 1462139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 14631323061aSAndrew Lunn { 1464139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 14653f118c44SMichael Walle int err; 14661323061aSAndrew Lunn 1467426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1468426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1469426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1470426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1471426c6cbcSPali Rohár * skip registration of hwmon device. 1472426c6cbcSPali Rohár */ 1473426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1474426c6cbcSPali Rohár dev_info(sfp->dev, 1475426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1476426c6cbcSPali Rohár dev_info(sfp->dev, 1477426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1478426c6cbcSPali Rohár return; 1479426c6cbcSPali Rohár } 1480426c6cbcSPali Rohár 1481139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1482139d3a21SRussell King if (err < 0) { 1483139d3a21SRussell King if (sfp->hwmon_tries--) { 1484139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1485139d3a21SRussell King T_PROBE_RETRY_SLOW); 1486139d3a21SRussell King } else { 14879ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 14889ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1489139d3a21SRussell King } 1490139d3a21SRussell King return; 1491139d3a21SRussell King } 1492139d3a21SRussell King 14933f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 14943f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1495139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1496139d3a21SRussell King return; 1497139d3a21SRussell King } 1498139d3a21SRussell King 1499139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1500139d3a21SRussell King sfp->hwmon_name, sfp, 1501139d3a21SRussell King &sfp_hwmon_chip_info, 1502139d3a21SRussell King NULL); 1503139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1504139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1505139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1506139d3a21SRussell King } 1507139d3a21SRussell King 1508139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1509139d3a21SRussell King { 1510f94b9bedSRussell King (Oracle) if (sfp->have_a2 && sfp->id.ext.diagmon & SFP_DIAGMON_DDM) { 1511139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1512139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 1513f94b9bedSRussell King (Oracle) } 15141323061aSAndrew Lunn 1515139d3a21SRussell King return 0; 15161323061aSAndrew Lunn } 15171323061aSAndrew Lunn 15181323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15191323061aSAndrew Lunn { 1520139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 15213e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 15221323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 15233e322474SAndrew Lunn sfp->hwmon_dev = NULL; 15241323061aSAndrew Lunn kfree(sfp->hwmon_name); 15251323061aSAndrew Lunn } 15263e322474SAndrew Lunn } 1527139d3a21SRussell King 1528139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1529139d3a21SRussell King { 1530139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1531139d3a21SRussell King 1532139d3a21SRussell King return 0; 1533139d3a21SRussell King } 1534139d3a21SRussell King 1535139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1536139d3a21SRussell King { 1537139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1538139d3a21SRussell King } 15391323061aSAndrew Lunn #else 15401323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 15411323061aSAndrew Lunn { 15421323061aSAndrew Lunn return 0; 15431323061aSAndrew Lunn } 15441323061aSAndrew Lunn 15451323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 15461323061aSAndrew Lunn { 15471323061aSAndrew Lunn } 1548139d3a21SRussell King 1549139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1550139d3a21SRussell King { 1551139d3a21SRussell King return 0; 1552139d3a21SRussell King } 1553139d3a21SRussell King 1554139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1555139d3a21SRussell King { 1556139d3a21SRussell King } 15571323061aSAndrew Lunn #endif 15581323061aSAndrew Lunn 155973970055SRussell King /* Helpers */ 156073970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 156173970055SRussell King { 156273970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 156373970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 1564418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, SFP_F_TX_DISABLE); 156573970055SRussell King } 156673970055SRussell King 156773970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 156873970055SRussell King { 156973970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 157073970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 1571418c1214SRussell King (Oracle) sfp_mod_state(sfp, SFP_F_TX_DISABLE, 0); 157273970055SRussell King } 157373970055SRussell King 15749cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 15759cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 15769cc8976cSRussell King { 15779cc8976cSRussell King struct sfp *sfp = s->private; 15789cc8976cSRussell King 15799cc8976cSRussell King seq_printf(s, "Module state: %s\n", 15809cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 15819cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 15829cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 15839cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 15849cc8976cSRussell King seq_printf(s, "Device state: %s\n", 15859cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 15869cc8976cSRussell King seq_printf(s, "Main state: %s\n", 15879cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 15889cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 15899cc8976cSRussell King sfp->sm_fault_retries); 15909cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 15919cc8976cSRussell King sfp->sm_phy_retries); 15929cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 15939cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 15949cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 15959cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 15969cc8976cSRussell King return 0; 15979cc8976cSRussell King } 15989cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 15999cc8976cSRussell King 16009cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 16019cc8976cSRussell King { 16029cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 16039cc8976cSRussell King 16049cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 16059cc8976cSRussell King &sfp_debug_state_fops); 16069cc8976cSRussell King } 16079cc8976cSRussell King 16089cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 16099cc8976cSRussell King { 16109cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 16119cc8976cSRussell King } 16129cc8976cSRussell King #else 16139cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 16149cc8976cSRussell King { 16159cc8976cSRussell King } 16169cc8976cSRussell King 16179cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 16189cc8976cSRussell King { 16199cc8976cSRussell King } 16209cc8976cSRussell King #endif 16219cc8976cSRussell King 162273970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 162373970055SRussell King { 16241974fd3bSRussell King (Oracle) unsigned int state; 162573970055SRussell King 16261974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 16271974fd3bSRussell King (Oracle) state = sfp->state; 16281974fd3bSRussell King (Oracle) if (!(state & SFP_F_TX_DISABLE)) { 162973970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 163073970055SRussell King 163173970055SRussell King udelay(T_RESET_US); 163273970055SRussell King 163373970055SRussell King sfp_set_state(sfp, state); 163473970055SRussell King } 16351974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 16361974fd3bSRussell King (Oracle) } 163773970055SRussell King 163873970055SRussell King /* SFP state machine */ 163973970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 164073970055SRussell King { 164173970055SRussell King if (timeout) 164273970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 164373970055SRussell King timeout); 164473970055SRussell King else 164573970055SRussell King cancel_delayed_work(&sfp->timeout); 164673970055SRussell King } 164773970055SRussell King 164873970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 164973970055SRussell King unsigned int timeout) 165073970055SRussell King { 165173970055SRussell King sfp->sm_state = state; 165273970055SRussell King sfp_sm_set_timer(sfp, timeout); 165373970055SRussell King } 165473970055SRussell King 16550936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1656516b29edSFlorian Fainelli unsigned int timeout) 165773970055SRussell King { 165873970055SRussell King sfp->sm_mod_state = state; 165973970055SRussell King sfp_sm_set_timer(sfp, timeout); 166073970055SRussell King } 166173970055SRussell King 166273970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 166373970055SRussell King { 166473970055SRussell King sfp_remove_phy(sfp->sfp_bus); 166573970055SRussell King phy_device_remove(sfp->mod_phy); 166673970055SRussell King phy_device_free(sfp->mod_phy); 166773970055SRussell King sfp->mod_phy = NULL; 166873970055SRussell King } 166973970055SRussell King 1670324e88cbSMarek Behún static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45) 167173970055SRussell King { 167273970055SRussell King struct phy_device *phy; 167373970055SRussell King int err; 167473970055SRussell King 1675324e88cbSMarek Behún phy = get_phy_device(sfp->i2c_mii, addr, is_c45); 16761cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 16771cb89a14SRussell King return PTR_ERR(phy); 167820b56ed9SRussell King if (IS_ERR(phy)) { 16799ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1680256e43cbSRussell King return PTR_ERR(phy); 168173970055SRussell King } 168273970055SRussell King 16839a484621SRussell King err = phy_device_register(phy); 16849a484621SRussell King if (err) { 16859a484621SRussell King phy_device_free(phy); 16869ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 16879ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1688256e43cbSRussell King return err; 16899a484621SRussell King } 16909a484621SRussell King 169173970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 169273970055SRussell King if (err) { 169373970055SRussell King phy_device_remove(phy); 169473970055SRussell King phy_device_free(phy); 16959ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1696256e43cbSRussell King return err; 169773970055SRussell King } 169873970055SRussell King 169973970055SRussell King sfp->mod_phy = phy; 1700256e43cbSRussell King 1701256e43cbSRussell King return 0; 170273970055SRussell King } 170373970055SRussell King 170473970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 170573970055SRussell King { 170673970055SRussell King sfp_link_up(sfp->sfp_bus); 170773970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 170873970055SRussell King } 170973970055SRussell King 171073970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 171173970055SRussell King { 171273970055SRussell King sfp_link_down(sfp->sfp_bus); 171373970055SRussell King } 171473970055SRussell King 171573970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 171673970055SRussell King { 1717624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1718624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1719624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1720624407d2SRussell King bool los = false; 172173970055SRussell King 1722710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1723624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1724624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 172573970055SRussell King */ 1726624407d2SRussell King if (los_options == los_inverted) 1727624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1728624407d2SRussell King else if (los_options == los_normal) 1729624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 173073970055SRussell King 173173970055SRussell King if (los) 173273970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 173373970055SRussell King else 173473970055SRussell King sfp_sm_link_up(sfp); 173573970055SRussell King } 173673970055SRussell King 1737710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1738710dfbb0SRussell King { 1739624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1740624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1741624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1742624407d2SRussell King 1743624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1744624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1745710dfbb0SRussell King } 1746710dfbb0SRussell King 1747710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1748710dfbb0SRussell King { 1749624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1750624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1751624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1752624407d2SRussell King 1753624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1754624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1755710dfbb0SRussell King } 1756710dfbb0SRussell King 175763ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 175873970055SRussell King { 1759281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1760516b29edSFlorian Fainelli dev_err(sfp->dev, 1761516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 176273970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 176373970055SRussell King } else { 176473970055SRussell King if (warn) 176573970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 176673970055SRussell King 176763ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 176873970055SRussell King } 176973970055SRussell King } 177073970055SRussell King 1771e85b1347SMarek Behún static int sfp_sm_add_mdio_bus(struct sfp *sfp) 1772e85b1347SMarek Behún { 1773e85b1347SMarek Behún if (sfp->mdio_protocol != MDIO_I2C_NONE) 1774e85b1347SMarek Behún return sfp_i2c_mdiobus_create(sfp); 1775e85b1347SMarek Behún 1776e85b1347SMarek Behún return 0; 1777e85b1347SMarek Behún } 1778e85b1347SMarek Behún 17799a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 17809a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 17819a484621SRussell King * or clause 45 PHY. 17829a484621SRussell King * 17839a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 17849a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 17859a484621SRussell King * PHY driver to determine. 17869a484621SRussell King * 17879a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 17889a484621SRussell King * mode according to the negotiated line speed. 17899a484621SRussell King */ 1790256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1791181f29daSRussell King { 1792256e43cbSRussell King int err = 0; 1793256e43cbSRussell King 1794e85b1347SMarek Behún switch (sfp->mdio_protocol) { 1795e85b1347SMarek Behún case MDIO_I2C_NONE: 17969a484621SRussell King break; 17979a484621SRussell King 1798e85b1347SMarek Behún case MDIO_I2C_MARVELL_C22: 1799324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, false); 18009a484621SRussell King break; 1801e85b1347SMarek Behún 1802e85b1347SMarek Behún case MDIO_I2C_C45: 1803324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR, true); 1804e85b1347SMarek Behún break; 180509bbedacSMarek Behún 180609bbedacSMarek Behún case MDIO_I2C_ROLLBALL: 1807324e88cbSMarek Behún err = sfp_sm_probe_phy(sfp, SFP_PHY_ADDR_ROLLBALL, true); 180809bbedacSMarek Behún break; 18099a484621SRussell King } 1810e85b1347SMarek Behún 1811256e43cbSRussell King return err; 181273970055SRussell King } 181373970055SRussell King 1814ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 18153bb35261SJon Nettleton { 1816ed32abb1SRussell King u32 power_mW = 1000; 18175765cee1SRussell King (Oracle) bool supports_a2; 18183bb35261SJon Nettleton 181918cc659eSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && 182018cc659eSRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1821ed32abb1SRussell King power_mW = 1500; 1822f8810ca7SRussell King (Oracle) /* Added in Rev 11.9, but there is no compliance code for this */ 1823f8810ca7SRussell King (Oracle) if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 && 1824f8810ca7SRussell King (Oracle) sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1825ed32abb1SRussell King power_mW = 2000; 18263bb35261SJon Nettleton 182702eaf5a7SRussell King (Oracle) /* Power level 1 modules (max. 1W) are always supported. */ 182802eaf5a7SRussell King (Oracle) if (power_mW <= 1000) { 182902eaf5a7SRussell King (Oracle) sfp->module_power_mW = power_mW; 183002eaf5a7SRussell King (Oracle) return 0; 183102eaf5a7SRussell King (Oracle) } 183202eaf5a7SRussell King (Oracle) 18335765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 18345765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 18355765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 18365765cee1SRussell King (Oracle) 1837ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 18387cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 18395765cee1SRussell King (Oracle) if (!supports_a2) { 18407cfa9c92SRussell King /* The module appears not to implement bus address 18417cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 18427cfa9c92SRussell King * indicated mode. 18437cfa9c92SRussell King */ 18443bb35261SJon Nettleton dev_err(sfp->dev, 18453bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1846ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18473bb35261SJon Nettleton return -EINVAL; 18487cfa9c92SRussell King } else { 18493bb35261SJon Nettleton dev_warn(sfp->dev, 18503bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1851ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 18523bb35261SJon Nettleton return 0; 18533bb35261SJon Nettleton } 18547cfa9c92SRussell King } 18557cfa9c92SRussell King 18565765cee1SRussell King (Oracle) if (!supports_a2) { 18575765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 18585765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 18595765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 18605765cee1SRussell King (Oracle) */ 18615765cee1SRussell King (Oracle) return 0; 18625765cee1SRussell King (Oracle) } 18635765cee1SRussell King (Oracle) 18647cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 18657cfa9c92SRussell King * an address change sequence, warn the user that the module may 18667cfa9c92SRussell King * not be functional. 18677cfa9c92SRussell King */ 18685765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 18697cfa9c92SRussell King dev_warn(sfp->dev, 187007f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 18717cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 18727cfa9c92SRussell King return 0; 18737cfa9c92SRussell King } 18743bb35261SJon Nettleton 1875ed32abb1SRussell King sfp->module_power_mW = power_mW; 1876ed32abb1SRussell King 1877ed32abb1SRussell King return 0; 1878ed32abb1SRussell King } 1879ed32abb1SRussell King 1880b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1881ed32abb1SRussell King { 1882ed32abb1SRussell King int err; 1883ed32abb1SRussell King 1884bd1432f6SRussell King (Oracle) err = sfp_modify_u8(sfp, true, SFP_EXT_STATUS, 1885bd1432f6SRussell King (Oracle) SFP_EXT_STATUS_PWRLVL_SELECT, 1886bd1432f6SRussell King (Oracle) enable ? SFP_EXT_STATUS_PWRLVL_SELECT : 0); 1887bd1432f6SRussell King (Oracle) if (err != sizeof(u8)) { 1888bd1432f6SRussell King (Oracle) dev_err(sfp->dev, "failed to %sable high power: %pe\n", 1889bd1432f6SRussell King (Oracle) enable ? "en" : "dis", ERR_PTR(err)); 1890b036a554SRussell King return -EAGAIN; 18913bb35261SJon Nettleton } 18923bb35261SJon Nettleton 1893b036a554SRussell King if (enable) 18943bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1895ed32abb1SRussell King sfp->module_power_mW / 1000, 1896ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 18973bb35261SJon Nettleton 1898b036a554SRussell King return 0; 18993bb35261SJon Nettleton } 19003bb35261SJon Nettleton 1901426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1902426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1903426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1904426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1905426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1906426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1907426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1908426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1909426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1910426c6cbcSPali Rohár * at a time. 19110d035bedSRussell King */ 1912426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 19130d035bedSRussell King { 1914426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 19150d035bedSRussell King 1916426c6cbcSPali Rohár /* Already using byte IO */ 1917426c6cbcSPali Rohár if (block_size == 1) 1918426c6cbcSPali Rohár return false; 1919426c6cbcSPali Rohár 1920426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1921426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1922426c6cbcSPali Rohár return false; 19230d035bedSRussell King } 1924426c6cbcSPali Rohár return true; 19250d035bedSRussell King } 19260d035bedSRussell King 1927b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1928b18432c5SChris Healy { 1929b18432c5SChris Healy u8 check; 1930b18432c5SChris Healy int err; 1931b18432c5SChris Healy 1932b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1933b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1934b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1935b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1936b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1937b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1938b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1939b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1940b18432c5SChris Healy if (err != 3) { 19419ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19429ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 19439ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1944b18432c5SChris Healy return err; 1945b18432c5SChris Healy } 1946b18432c5SChris Healy 1947b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1948b18432c5SChris Healy mdelay(50); 1949b18432c5SChris Healy 1950b18432c5SChris Healy /* Update base structure checksum */ 1951b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1952b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1953b18432c5SChris Healy if (err != 1) { 19549ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 19559ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 19569ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1957b18432c5SChris Healy return err; 1958b18432c5SChris Healy } 1959b18432c5SChris Healy } 1960b18432c5SChris Healy return 0; 1961b18432c5SChris Healy } 1962b18432c5SChris Healy 1963f94b9bedSRussell King (Oracle) static int sfp_module_parse_sff8472(struct sfp *sfp) 1964f94b9bedSRussell King (Oracle) { 1965f94b9bedSRussell King (Oracle) /* If the module requires address swap mode, warn about it */ 1966f94b9bedSRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1967f94b9bedSRussell King (Oracle) dev_warn(sfp->dev, 1968f94b9bedSRussell King (Oracle) "module address swap to access page 0xA2 is not supported.\n"); 1969f94b9bedSRussell King (Oracle) else 1970f94b9bedSRussell King (Oracle) sfp->have_a2 = true; 1971f94b9bedSRussell King (Oracle) 1972f94b9bedSRussell King (Oracle) return 0; 1973f94b9bedSRussell King (Oracle) } 1974f94b9bedSRussell King (Oracle) 1975e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 197673970055SRussell King { 197773970055SRussell King /* SFP module inserted - read I2C data */ 197873970055SRussell King struct sfp_eeprom_id id; 1979b18432c5SChris Healy bool cotsworks_sfbg; 19801974fd3bSRussell King (Oracle) unsigned int mask; 1981981f1f80SRussell King bool cotsworks; 198273970055SRussell King u8 check; 19833bb35261SJon Nettleton int ret; 198473970055SRussell King 1985813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 19860d035bedSRussell King 19870d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 19883bb35261SJon Nettleton if (ret < 0) { 1989e117be74SRussell King if (report) 19909ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 19919ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 199273970055SRussell King return -EAGAIN; 199373970055SRussell King } 199473970055SRussell King 19950d035bedSRussell King if (ret != sizeof(id.base)) { 19969ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 199773970055SRussell King return -EAGAIN; 199873970055SRussell King } 199973970055SRussell King 2000426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 2001426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 2002426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 2003426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 2004426c6cbcSPali Rohár * is really required and we have no other option. 2005426c6cbcSPali Rohár */ 2006426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 2007426c6cbcSPali Rohár dev_info(sfp->dev, 2008426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 2009426c6cbcSPali Rohár dev_info(sfp->dev, 2010426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 2011426c6cbcSPali Rohár sfp->i2c_block_size = 1; 2012426c6cbcSPali Rohár 2013426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 2014426c6cbcSPali Rohár if (ret < 0) { 2015426c6cbcSPali Rohár if (report) 20169ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 20179ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 20189ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2019426c6cbcSPali Rohár return -EAGAIN; 2020426c6cbcSPali Rohár } 2021426c6cbcSPali Rohár 2022426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 20239ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 20249ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 2025426c6cbcSPali Rohár return -EAGAIN; 2026426c6cbcSPali Rohár } 2027426c6cbcSPali Rohár } 2028426c6cbcSPali Rohár 2029981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 2030981f1f80SRussell King * do the final programming with the final module part number, 2031981f1f80SRussell King * serial number and date code. 2032981f1f80SRussell King */ 2033981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 2034b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 2035b18432c5SChris Healy 2036b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 2037b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 2038b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 2039b18432c5SChris Healy */ 2040b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 2041b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 2042b18432c5SChris Healy if (ret < 0) 2043b18432c5SChris Healy return ret; 2044b18432c5SChris Healy } 2045981f1f80SRussell King 204673970055SRussell King /* Validate the checksum over the base structure */ 204773970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 204873970055SRussell King if (check != id.base.cc_base) { 2049981f1f80SRussell King if (cotsworks) { 2050981f1f80SRussell King dev_warn(sfp->dev, 2051981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 2052981f1f80SRussell King check, id.base.cc_base); 2053981f1f80SRussell King } else { 205473970055SRussell King dev_err(sfp->dev, 2055981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 2056981f1f80SRussell King check, id.base.cc_base); 205773970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2058981f1f80SRussell King 16, 1, &id, sizeof(id), true); 205973970055SRussell King return -EINVAL; 206073970055SRussell King } 2061981f1f80SRussell King } 206273970055SRussell King 20630d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 20640d035bedSRussell King if (ret < 0) { 20650d035bedSRussell King if (report) 20669ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 20679ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 20680d035bedSRussell King return -EAGAIN; 20690d035bedSRussell King } 20700d035bedSRussell King 20710d035bedSRussell King if (ret != sizeof(id.ext)) { 20729ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 20730d035bedSRussell King return -EAGAIN; 20740d035bedSRussell King } 20750d035bedSRussell King 207673970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 207773970055SRussell King if (check != id.ext.cc_ext) { 2078981f1f80SRussell King if (cotsworks) { 2079981f1f80SRussell King dev_warn(sfp->dev, 2080981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 2081981f1f80SRussell King check, id.ext.cc_ext); 2082981f1f80SRussell King } else { 208373970055SRussell King dev_err(sfp->dev, 2084981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 2085981f1f80SRussell King check, id.ext.cc_ext); 2086981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 2087981f1f80SRussell King 16, 1, &id, sizeof(id), true); 208873970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 208973970055SRussell King } 2090981f1f80SRussell King } 209173970055SRussell King 209273970055SRussell King sfp->id = id; 209373970055SRussell King 2094a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 2095a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 2096a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 2097a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 2098a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 2099a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 210073970055SRussell King 2101259c8618SRussell King /* Check whether we support this module */ 2102f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 2103259c8618SRussell King dev_err(sfp->dev, 2104259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 210573970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 210673970055SRussell King return -EINVAL; 210773970055SRussell King } 210873970055SRussell King 2109f94b9bedSRussell King (Oracle) if (sfp->id.ext.sff8472_compliance != SFP_SFF8472_COMPLIANCE_NONE) { 2110f94b9bedSRussell King (Oracle) ret = sfp_module_parse_sff8472(sfp); 2111f94b9bedSRussell King (Oracle) if (ret < 0) 2112f94b9bedSRussell King (Oracle) return ret; 2113f94b9bedSRussell King (Oracle) } 2114ec7681bdSRussell King 2115ed32abb1SRussell King /* Parse the module power requirement */ 2116ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 2117ed32abb1SRussell King if (ret < 0) 2118ed32abb1SRussell King return ret; 2119ed32abb1SRussell King 21201974fd3bSRussell King (Oracle) mask = SFP_F_PRESENT; 21218475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 21221974fd3bSRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 21238475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 21241974fd3bSRussell King (Oracle) mask |= SFP_F_TX_FAULT; 21258475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 21261974fd3bSRussell King (Oracle) mask |= SFP_F_LOS; 21278475c4b7SRussell King (Oracle) 212826c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 2129324e88cbSMarek Behún sfp->module_t_wait = T_WAIT; 213026c97a2dSRussell King 21312069624dSMatthew Hagan sfp->tx_fault_ignore = false; 21322069624dSMatthew Hagan 2133e85b1347SMarek Behún if (sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SFI || 2134e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_10GBASE_T_SR || 2135e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_5GBASE_T || 2136e85b1347SMarek Behún sfp->id.base.extended_cc == SFF8024_ECC_2_5GBASE_T) 2137e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_C45; 2138e85b1347SMarek Behún else if (sfp->id.base.e1000_base_t) 2139e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_MARVELL_C22; 2140e85b1347SMarek Behún else 2141e85b1347SMarek Behún sfp->mdio_protocol = MDIO_I2C_NONE; 2142e85b1347SMarek Behún 214323571c7bSRussell King (Oracle) sfp->quirk = sfp_lookup_quirk(&id); 21441974fd3bSRussell King (Oracle) 21451974fd3bSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 21461974fd3bSRussell King (Oracle) /* Initialise state bits to use from hardware */ 21471974fd3bSRussell King (Oracle) sfp->state_hw_mask = mask; 21481974fd3bSRussell King (Oracle) 214927541675SRussell King (Oracle) if (sfp->quirk && sfp->quirk->fixup) 215027541675SRussell King (Oracle) sfp->quirk->fixup(sfp); 21511974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 215223571c7bSRussell King (Oracle) 2153b036a554SRussell King return 0; 215473970055SRussell King } 215573970055SRussell King 215673970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 215773970055SRussell King { 215873f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 215973970055SRussell King sfp_module_remove(sfp->sfp_bus); 216073970055SRussell King 21611323061aSAndrew Lunn sfp_hwmon_remove(sfp); 21621323061aSAndrew Lunn 216373970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 2164ed32abb1SRussell King sfp->module_power_mW = 0; 2165f94b9bedSRussell King (Oracle) sfp->have_a2 = false; 216673970055SRussell King 216773970055SRussell King dev_info(sfp->dev, "module removed\n"); 216873970055SRussell King } 216973970055SRussell King 21706b0da5c9SRussell King /* This state machine tracks the upstream's state */ 2171e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 217273970055SRussell King { 2173e85d81a1SRussell King switch (sfp->sm_dev_state) { 2174e85d81a1SRussell King default: 21756b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 21766b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 21776b0da5c9SRussell King break; 21786b0da5c9SRussell King 21796b0da5c9SRussell King case SFP_DEV_DOWN: 21806b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21816b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21826b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 2183e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 2184e85d81a1SRussell King break; 218573970055SRussell King 2186e85d81a1SRussell King case SFP_DEV_UP: 21876b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 21886b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 21896b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2190e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2191e85d81a1SRussell King break; 2192e85d81a1SRussell King } 2193e85d81a1SRussell King } 219473970055SRussell King 2195d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2196d900954fSRussell King * the on-board EEPROM, and sets up the power level. 219773970055SRussell King */ 2198e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2199e85d81a1SRussell King { 2200b036a554SRussell King int err; 2201b036a554SRussell King 2202b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2203b036a554SRussell King if (event == SFP_E_REMOVE) { 2204d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2205d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2206b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2207b036a554SRussell King return; 2208b036a554SRussell King } 2209b036a554SRussell King 2210b036a554SRussell King /* Handle device detach globally */ 221173f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 221273f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2213b036a554SRussell King if (sfp->module_power_mW > 1000 && 2214b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2215b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 221673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2217d2e816c0SRussell King return; 2218d2e816c0SRussell King } 2219d2e816c0SRussell King 222073970055SRussell King switch (sfp->sm_mod_state) { 222173970055SRussell King default: 2222e117be74SRussell King if (event == SFP_E_INSERT) { 2223d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2224e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2225e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2226e117be74SRussell King } 222773970055SRussell King break; 222873970055SRussell King 222973970055SRussell King case SFP_MOD_PROBE: 223073f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2231b036a554SRussell King if (event != SFP_E_TIMEOUT) 2232b036a554SRussell King break; 223373970055SRussell King 2234e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2235b036a554SRussell King if (err == -EAGAIN) { 2236e117be74SRussell King if (sfp->sm_mod_tries_init && 2237e117be74SRussell King --sfp->sm_mod_tries_init) { 2238e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2239b036a554SRussell King break; 2240e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2241e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2242e117be74SRussell King dev_warn(sfp->dev, 2243e117be74SRussell King "please wait, module slow to respond\n"); 2244e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2245e117be74SRussell King break; 2246e117be74SRussell King } 2247b036a554SRussell King } 2248b036a554SRussell King if (err < 0) { 2249b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2250b036a554SRussell King break; 2251b036a554SRussell King } 2252b036a554SRussell King 225304361b8bSRussell King (Oracle) /* Force a poll to re-read the hardware signal state after 225404361b8bSRussell King (Oracle) * sfp_sm_mod_probe() changed state_hw_mask. 225504361b8bSRussell King (Oracle) */ 225604361b8bSRussell King (Oracle) mod_delayed_work(system_wq, &sfp->poll, 1); 225704361b8bSRussell King (Oracle) 225838ecd706SRussell King err = sfp_hwmon_insert(sfp); 225938ecd706SRussell King if (err) 22609ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 22619ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 226238ecd706SRussell King 226373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2264df561f66SGustavo A. R. Silva fallthrough; 226573f5e847SRussell King case SFP_MOD_WAITDEV: 226673f5e847SRussell King /* Ensure that the device is attached before proceeding */ 226773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 226873f5e847SRussell King break; 226973f5e847SRussell King 227073f5e847SRussell King /* Report the module insertion to the upstream device */ 227123571c7bSRussell King (Oracle) err = sfp_module_insert(sfp->sfp_bus, &sfp->id, 227223571c7bSRussell King (Oracle) sfp->quirk); 227373f5e847SRussell King if (err < 0) { 227473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 227573f5e847SRussell King break; 227673f5e847SRussell King } 227773f5e847SRussell King 2278b036a554SRussell King /* If this is a power level 1 module, we are done */ 2279b036a554SRussell King if (sfp->module_power_mW <= 1000) 2280b036a554SRussell King goto insert; 2281b036a554SRussell King 2282b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2283df561f66SGustavo A. R. Silva fallthrough; 2284b036a554SRussell King case SFP_MOD_HPOWER: 2285b036a554SRussell King /* Enable high power mode */ 2286b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 228773f5e847SRussell King if (err < 0) { 228873f5e847SRussell King if (err != -EAGAIN) { 228973f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 22900936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 229173f5e847SRussell King } else { 2292e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 229373f5e847SRussell King } 229473f5e847SRussell King break; 229573f5e847SRussell King } 229673f5e847SRussell King 229773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 229873970055SRussell King break; 229973970055SRussell King 2300b036a554SRussell King case SFP_MOD_WAITPWR: 2301b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2302b036a554SRussell King if (event != SFP_E_TIMEOUT) 2303b036a554SRussell King break; 2304b036a554SRussell King 2305b036a554SRussell King insert: 23060936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 23073bb35261SJon Nettleton break; 2308b036a554SRussell King 230973970055SRussell King case SFP_MOD_PRESENT: 231073970055SRussell King case SFP_MOD_ERROR: 231173970055SRussell King break; 231273970055SRussell King } 231373970055SRussell King } 231473970055SRussell King 2315e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2316e85d81a1SRussell King { 2317eefa6f1fSRussell King unsigned long timeout; 23181cb89a14SRussell King int ret; 2319eefa6f1fSRussell King 232073970055SRussell King /* Some events are global */ 232173970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 232273970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 232373970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 232473970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 232573970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 232673970055SRussell King sfp_sm_link_down(sfp); 232774c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 232874c551caSRussell King sfp_module_stop(sfp->sfp_bus); 232973970055SRussell King if (sfp->mod_phy) 233073970055SRussell King sfp_sm_phy_detach(sfp); 2331e85b1347SMarek Behún if (sfp->i2c_mii) 2332e85b1347SMarek Behún sfp_i2c_mdiobus_destroy(sfp); 23331539e0d3SRussell King sfp_module_tx_disable(sfp); 2334f3c9a666SRussell King sfp_soft_stop_poll(sfp); 233573970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 233673970055SRussell King return; 233773970055SRussell King } 233873970055SRussell King 233973970055SRussell King /* The main state machine */ 234073970055SRussell King switch (sfp->sm_state) { 234173970055SRussell King case SFP_S_DOWN: 2342eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2343eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2344eefa6f1fSRussell King break; 2345eefa6f1fSRussell King 23465daed426SRussell King (Oracle) /* Only use the soft state bits if we have access to the A2h 23475daed426SRussell King (Oracle) * memory, which implies that we have some level of SFF-8472 23485daed426SRussell King (Oracle) * compliance. 23495daed426SRussell King (Oracle) */ 23505daed426SRussell King (Oracle) if (sfp->have_a2) 2351f3c9a666SRussell King sfp_soft_start_poll(sfp); 2352f3c9a666SRussell King 2353f3c9a666SRussell King sfp_module_tx_enable(sfp); 2354eefa6f1fSRussell King 2355eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2356281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2357eefa6f1fSRussell King 2358eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2359eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2360324e88cbSMarek Behún * anything (such as probe for a PHY) is 50ms (or more on 2361324e88cbSMarek Behún * specific modules). 2362eefa6f1fSRussell King */ 2363324e88cbSMarek Behún sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); 2364eefa6f1fSRussell King break; 2365eefa6f1fSRussell King 2366eefa6f1fSRussell King case SFP_S_WAIT: 2367eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2368eefa6f1fSRussell King break; 2369eefa6f1fSRussell King 2370eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 237126c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 237226c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 237326c97a2dSRussell King * initialise, which is indicated by TX_FAULT 237426c97a2dSRussell King * deasserting. 2375181f29daSRussell King */ 237626c97a2dSRussell King timeout = sfp->module_t_start_up; 2377324e88cbSMarek Behún if (timeout > sfp->module_t_wait) 2378324e88cbSMarek Behún timeout -= sfp->module_t_wait; 2379eefa6f1fSRussell King else 2380eefa6f1fSRussell King timeout = 1; 2381eefa6f1fSRussell King 2382eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2383eefa6f1fSRussell King } else { 2384eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2385eefa6f1fSRussell King * finished initialising. 2386eefa6f1fSRussell King */ 2387eefa6f1fSRussell King goto init_done; 2388181f29daSRussell King } 238973970055SRussell King break; 239073970055SRussell King 239173970055SRussell King case SFP_S_INIT: 2392d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2393e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 239426c97a2dSRussell King * or t_start_up, so assume there is a fault. 2395d23751a0SRussell King */ 2396d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2397281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2398d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 23991cb89a14SRussell King init_done: 2400e85b1347SMarek Behún /* Create mdiobus and start trying for PHY */ 2401e85b1347SMarek Behún ret = sfp_sm_add_mdio_bus(sfp); 2402e85b1347SMarek Behún if (ret < 0) { 2403e85b1347SMarek Behún sfp_sm_next(sfp, SFP_S_FAIL, 0); 2404e85b1347SMarek Behún break; 2405e85b1347SMarek Behún } 24061cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 24071cb89a14SRussell King goto phy_probe; 24081cb89a14SRussell King } 24091cb89a14SRussell King break; 24101cb89a14SRussell King 24111cb89a14SRussell King case SFP_S_INIT_PHY: 24121cb89a14SRussell King if (event != SFP_E_TIMEOUT) 24131cb89a14SRussell King break; 24141cb89a14SRussell King phy_probe: 24151cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2416d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2417d23751a0SRussell King */ 24181cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 24191cb89a14SRussell King if (ret == -ENODEV) { 24201cb89a14SRussell King if (--sfp->sm_phy_retries) { 24211cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 24221cb89a14SRussell King break; 24231cb89a14SRussell King } else { 24241cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 24251cb89a14SRussell King } 24261cb89a14SRussell King } else if (ret) { 2427256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2428256e43cbSRussell King break; 2429256e43cbSRussell King } 243074c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 243174c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 243274c551caSRussell King break; 243374c551caSRussell King } 2434d23751a0SRussell King sfp_sm_link_check_los(sfp); 2435d23751a0SRussell King 2436d23751a0SRussell King /* Reset the fault retry count */ 2437281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2438d23751a0SRussell King break; 2439d23751a0SRussell King 2440d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2441d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2442d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 244326c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2444d23751a0SRussell King } 244573970055SRussell King break; 244673970055SRussell King 244773970055SRussell King case SFP_S_WAIT_LOS: 244873970055SRussell King if (event == SFP_E_TX_FAULT) 244963ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2450710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 245173970055SRussell King sfp_sm_link_up(sfp); 245273970055SRussell King break; 245373970055SRussell King 245473970055SRussell King case SFP_S_LINK_UP: 245573970055SRussell King if (event == SFP_E_TX_FAULT) { 245673970055SRussell King sfp_sm_link_down(sfp); 245763ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2458710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 245973970055SRussell King sfp_sm_link_down(sfp); 246073970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 246173970055SRussell King } 246273970055SRussell King break; 246373970055SRussell King 246473970055SRussell King case SFP_S_TX_FAULT: 246573970055SRussell King if (event == SFP_E_TIMEOUT) { 246673970055SRussell King sfp_module_tx_fault_reset(sfp); 246726c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 246873970055SRussell King } 246973970055SRussell King break; 247073970055SRussell King 247173970055SRussell King case SFP_S_REINIT: 247273970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 247363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 247473970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 247573970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 247673970055SRussell King sfp_sm_link_check_los(sfp); 247773970055SRussell King } 247873970055SRussell King break; 247973970055SRussell King 248073970055SRussell King case SFP_S_TX_DISABLE: 248173970055SRussell King break; 248273970055SRussell King } 2483e85d81a1SRussell King } 2484e85d81a1SRussell King 248597a49205SRussell King (Oracle) static void __sfp_sm_event(struct sfp *sfp, unsigned int event) 2486e85d81a1SRussell King { 2487e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2488e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2489e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2490e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2491e85d81a1SRussell King event_to_str(event)); 2492e85d81a1SRussell King 2493e85d81a1SRussell King sfp_sm_device(sfp, event); 24946b0da5c9SRussell King sfp_sm_module(sfp, event); 2495e85d81a1SRussell King sfp_sm_main(sfp, event); 249673970055SRussell King 24974005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 24984005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 24994005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 25004005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 250197a49205SRussell King (Oracle) } 250273970055SRussell King 250397a49205SRussell King (Oracle) static void sfp_sm_event(struct sfp *sfp, unsigned int event) 250497a49205SRussell King (Oracle) { 250597a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 250697a49205SRussell King (Oracle) __sfp_sm_event(sfp, event); 250773970055SRussell King mutex_unlock(&sfp->sm_mutex); 250873970055SRussell King } 250973970055SRussell King 2510b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2511b5bfc21aSRussell King { 25126b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2513b5bfc21aSRussell King } 2514b5bfc21aSRussell King 2515b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2516b5bfc21aSRussell King { 25176b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2518b5bfc21aSRussell King } 2519b5bfc21aSRussell King 252073970055SRussell King static void sfp_start(struct sfp *sfp) 252173970055SRussell King { 252273970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 252373970055SRussell King } 252473970055SRussell King 252573970055SRussell King static void sfp_stop(struct sfp *sfp) 252673970055SRussell King { 252773970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 252873970055SRussell King } 252973970055SRussell King 2530*dc185822SRussell King (Oracle) static void sfp_set_signal_rate(struct sfp *sfp, unsigned int rate_kbd) 2531*dc185822SRussell King (Oracle) { 2532*dc185822SRussell King (Oracle) } 2533*dc185822SRussell King (Oracle) 253473970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 253573970055SRussell King { 253673970055SRussell King /* locking... and check module is present */ 253773970055SRussell King 2538ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2539ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 254073970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 254173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 254273970055SRussell King } else { 254373970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 254473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 254573970055SRussell King } 254673970055SRussell King return 0; 254773970055SRussell King } 254873970055SRussell King 254973970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 255073970055SRussell King u8 *data) 255173970055SRussell King { 255273970055SRussell King unsigned int first, last, len; 255373970055SRussell King int ret; 255473970055SRussell King 2555bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2556bef227c1SIvan Bornyakov return -ENODEV; 2557bef227c1SIvan Bornyakov 255873970055SRussell King if (ee->len == 0) 255973970055SRussell King return -EINVAL; 256073970055SRussell King 256173970055SRussell King first = ee->offset; 256273970055SRussell King last = ee->offset + ee->len; 256373970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 256473970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 256573970055SRussell King len -= first; 256673970055SRussell King 25672794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 256873970055SRussell King if (ret < 0) 256973970055SRussell King return ret; 257073970055SRussell King 257173970055SRussell King first += len; 257273970055SRussell King data += len; 257373970055SRussell King } 25742794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 257573970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 257673970055SRussell King len -= first; 257773970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 257873970055SRussell King 25792794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 258073970055SRussell King if (ret < 0) 258173970055SRussell King return ret; 258273970055SRussell King } 258373970055SRussell King return 0; 258473970055SRussell King } 258573970055SRussell King 2586d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2587d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2588d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2589d740513fSAndrew Lunn { 2590bef227c1SIvan Bornyakov if (!(sfp->state & SFP_F_PRESENT)) 2591bef227c1SIvan Bornyakov return -ENODEV; 2592bef227c1SIvan Bornyakov 2593d740513fSAndrew Lunn if (page->bank) { 2594d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2595d740513fSAndrew Lunn return -EOPNOTSUPP; 2596d740513fSAndrew Lunn } 2597d740513fSAndrew Lunn 2598d740513fSAndrew Lunn if (page->page) { 2599d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2600d740513fSAndrew Lunn return -EOPNOTSUPP; 2601d740513fSAndrew Lunn } 2602d740513fSAndrew Lunn 2603d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2604d740513fSAndrew Lunn page->i2c_address != 0x51) { 2605d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2606d740513fSAndrew Lunn return -EOPNOTSUPP; 2607d740513fSAndrew Lunn } 2608d740513fSAndrew Lunn 2609d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2610d740513fSAndrew Lunn page->data, page->length); 2611d740513fSAndrew Lunn }; 2612d740513fSAndrew Lunn 261373970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2614b5bfc21aSRussell King .attach = sfp_attach, 2615b5bfc21aSRussell King .detach = sfp_detach, 261673970055SRussell King .start = sfp_start, 261773970055SRussell King .stop = sfp_stop, 2618*dc185822SRussell King (Oracle) .set_signal_rate = sfp_set_signal_rate, 261973970055SRussell King .module_info = sfp_module_info, 262073970055SRussell King .module_eeprom = sfp_module_eeprom, 2621d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 262273970055SRussell King }; 262373970055SRussell King 262473970055SRussell King static void sfp_timeout(struct work_struct *work) 262573970055SRussell King { 262673970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 262773970055SRussell King 262873970055SRussell King rtnl_lock(); 262973970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 263073970055SRussell King rtnl_unlock(); 263173970055SRussell King } 263273970055SRussell King 263373970055SRussell King static void sfp_check_state(struct sfp *sfp) 263473970055SRussell King { 263573970055SRussell King unsigned int state, i, changed; 263673970055SRussell King 2637d47e5a43SRussell King (Oracle) rtnl_lock(); 2638a9fe964eSRussell King (Oracle) mutex_lock(&sfp->st_mutex); 263973970055SRussell King state = sfp_get_state(sfp); 264073970055SRussell King changed = state ^ sfp->state; 26412069624dSMatthew Hagan if (sfp->tx_fault_ignore) 26422069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 26432069624dSMatthew Hagan else 264473970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 264573970055SRussell King 264673970055SRussell King for (i = 0; i < GPIO_MAX; i++) 264773970055SRussell King if (changed & BIT(i)) 2648f35cb547SRussell King (Oracle) dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_names[i], 264973970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 265073970055SRussell King 265173970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 265273970055SRussell King sfp->state = state; 26531974fd3bSRussell King (Oracle) mutex_unlock(&sfp->st_mutex); 265473970055SRussell King 265597a49205SRussell King (Oracle) mutex_lock(&sfp->sm_mutex); 265673970055SRussell King if (changed & SFP_F_PRESENT) 265797a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_PRESENT ? 265873970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 265973970055SRussell King 266073970055SRussell King if (changed & SFP_F_TX_FAULT) 266197a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 266273970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 266373970055SRussell King 266473970055SRussell King if (changed & SFP_F_LOS) 266597a49205SRussell King (Oracle) __sfp_sm_event(sfp, state & SFP_F_LOS ? 266673970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 266797a49205SRussell King (Oracle) mutex_unlock(&sfp->sm_mutex); 2668a9fe964eSRussell King (Oracle) rtnl_unlock(); 266973970055SRussell King } 267073970055SRussell King 267173970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 267273970055SRussell King { 267373970055SRussell King struct sfp *sfp = data; 267473970055SRussell King 267573970055SRussell King sfp_check_state(sfp); 267673970055SRussell King 267773970055SRussell King return IRQ_HANDLED; 267873970055SRussell King } 267973970055SRussell King 268073970055SRussell King static void sfp_poll(struct work_struct *work) 268173970055SRussell King { 268273970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 268373970055SRussell King 268473970055SRussell King sfp_check_state(sfp); 2685f3c9a666SRussell King 26861974fd3bSRussell King (Oracle) // st_mutex doesn't need to be held here for state_soft_mask, 26871974fd3bSRussell King (Oracle) // it's unimportant if we race while reading this. 2688f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2689f3c9a666SRussell King sfp->need_poll) 269073970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 269173970055SRussell King } 269273970055SRussell King 269373970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 269473970055SRussell King { 269573970055SRussell King struct sfp *sfp; 269673970055SRussell King 269773970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 269873970055SRussell King if (!sfp) 269973970055SRussell King return ERR_PTR(-ENOMEM); 270073970055SRussell King 270173970055SRussell King sfp->dev = dev; 2702813c2dd7SIvan Bornyakov sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE; 270373970055SRussell King 270473970055SRussell King mutex_init(&sfp->sm_mutex); 27052158e856SRobert Hancock mutex_init(&sfp->st_mutex); 270673970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 270773970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 270873970055SRussell King 2709139d3a21SRussell King sfp_hwmon_init(sfp); 2710139d3a21SRussell King 271173970055SRussell King return sfp; 271273970055SRussell King } 271373970055SRussell King 271473970055SRussell King static void sfp_cleanup(void *data) 271573970055SRussell King { 271673970055SRussell King struct sfp *sfp = data; 271773970055SRussell King 2718139d3a21SRussell King sfp_hwmon_exit(sfp); 2719139d3a21SRussell King 272073970055SRussell King cancel_delayed_work_sync(&sfp->poll); 272173970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 272273970055SRussell King if (sfp->i2c_mii) { 272373970055SRussell King mdiobus_unregister(sfp->i2c_mii); 272473970055SRussell King mdiobus_free(sfp->i2c_mii); 272573970055SRussell King } 272673970055SRussell King if (sfp->i2c) 272773970055SRussell King i2c_put_adapter(sfp->i2c); 272873970055SRussell King kfree(sfp); 272973970055SRussell King } 273073970055SRussell King 273115309fb2SRussell King (Oracle) static int sfp_i2c_get(struct sfp *sfp) 273215309fb2SRussell King (Oracle) { 273315309fb2SRussell King (Oracle) struct fwnode_handle *h; 273415309fb2SRussell King (Oracle) struct i2c_adapter *i2c; 273515309fb2SRussell King (Oracle) int err; 273615309fb2SRussell King (Oracle) 273715309fb2SRussell King (Oracle) h = fwnode_find_reference(dev_fwnode(sfp->dev), "i2c-bus", 0); 273815309fb2SRussell King (Oracle) if (IS_ERR(h)) { 273915309fb2SRussell King (Oracle) dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 274015309fb2SRussell King (Oracle) return -ENODEV; 274115309fb2SRussell King (Oracle) } 274215309fb2SRussell King (Oracle) 2743ff31a0c4SRussell King (Oracle) i2c = i2c_get_adapter_by_fwnode(h); 274415309fb2SRussell King (Oracle) if (!i2c) { 274515309fb2SRussell King (Oracle) err = -EPROBE_DEFER; 274615309fb2SRussell King (Oracle) goto put; 274715309fb2SRussell King (Oracle) } 274815309fb2SRussell King (Oracle) 274915309fb2SRussell King (Oracle) err = sfp_i2c_configure(sfp, i2c); 275015309fb2SRussell King (Oracle) if (err) 275115309fb2SRussell King (Oracle) i2c_put_adapter(i2c); 275215309fb2SRussell King (Oracle) put: 275315309fb2SRussell King (Oracle) fwnode_handle_put(h); 275415309fb2SRussell King (Oracle) return err; 275515309fb2SRussell King (Oracle) } 275615309fb2SRussell King (Oracle) 275773970055SRussell King static int sfp_probe(struct platform_device *pdev) 275873970055SRussell King { 2759259c8618SRussell King const struct sff_data *sff; 27605411ca71SChris Healy char *sfp_irq_name; 276173970055SRussell King struct sfp *sfp; 2762257c2559SRobert Hancock int err, i; 276373970055SRussell King 276473970055SRussell King sfp = sfp_alloc(&pdev->dev); 276573970055SRussell King if (IS_ERR(sfp)) 276673970055SRussell King return PTR_ERR(sfp); 276773970055SRussell King 276873970055SRussell King platform_set_drvdata(pdev, sfp); 276973970055SRussell King 27700a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 277173970055SRussell King if (err < 0) 277273970055SRussell King return err; 277373970055SRussell King 2774b71dda81SRussell King (Oracle) sff = device_get_match_data(sfp->dev); 2775b71dda81SRussell King (Oracle) if (!sff) 2776b71dda81SRussell King (Oracle) sff = &sfp_data; 2777259c8618SRussell King 2778b71dda81SRussell King (Oracle) sfp->type = sff; 27797ce236faSRuslan Babayev 278015309fb2SRussell King (Oracle) err = sfp_i2c_get(sfp); 278115309fb2SRussell King (Oracle) if (err) 278273970055SRussell King return err; 278373970055SRussell King 2784259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2785259c8618SRussell King if (sff->gpios & BIT(i)) { 278673970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 2787f35cb547SRussell King (Oracle) gpio_names[i], gpio_flags[i]); 278873970055SRussell King if (IS_ERR(sfp->gpio[i])) 278973970055SRussell King return PTR_ERR(sfp->gpio[i]); 279073970055SRussell King } 279173970055SRussell King 27928475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 27938475c4b7SRussell King (Oracle) 279473970055SRussell King sfp->get_state = sfp_gpio_get_state; 279573970055SRussell King sfp->set_state = sfp_gpio_set_state; 2796259c8618SRussell King 2797259c8618SRussell King /* Modules that have no detect signal are always present */ 2798259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2799259c8618SRussell King sfp->get_state = sff_gpio_get_state; 280073970055SRussell King 28013bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 28023bb35261SJon Nettleton &sfp->max_power_mW); 280302eaf5a7SRussell King (Oracle) if (sfp->max_power_mW < 1000) { 280402eaf5a7SRussell King (Oracle) if (sfp->max_power_mW) 280502eaf5a7SRussell King (Oracle) dev_warn(sfp->dev, 280602eaf5a7SRussell King (Oracle) "Firmware bug: host maximum power should be at least 1W\n"); 28073bb35261SJon Nettleton sfp->max_power_mW = 1000; 280802eaf5a7SRussell King (Oracle) } 28093bb35261SJon Nettleton 28103bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 28113bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 28123bb35261SJon Nettleton 281373970055SRussell King /* Get the initial state, and always signal TX disable, 281473970055SRussell King * since the network interface will not be up. 281573970055SRussell King */ 281673970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 281773970055SRussell King 281873970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 281973970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 282073970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 282173970055SRussell King sfp_set_state(sfp, sfp->state); 282273970055SRussell King sfp_module_tx_disable(sfp); 282373f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 282473f5e847SRussell King rtnl_lock(); 282573f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 282673f5e847SRussell King rtnl_unlock(); 282773f5e847SRussell King } 282873970055SRussell King 282973970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 283073970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 283173970055SRussell King continue; 283273970055SRussell King 2833257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 283496216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 283596216181SYueHaibing sfp->gpio_irq[i] = 0; 2836f3c9a666SRussell King sfp->need_poll = true; 283773970055SRussell King continue; 283873970055SRussell King } 283973970055SRussell King 28405411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 28415411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 2842f35cb547SRussell King (Oracle) gpio_names[i]); 28435411ca71SChris Healy 28448cb601f1SChris Healy if (!sfp_irq_name) 28458cb601f1SChris Healy return -ENOMEM; 28468cb601f1SChris Healy 2847257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2848257c2559SRobert Hancock NULL, sfp_irq, 284973970055SRussell King IRQF_ONESHOT | 285073970055SRussell King IRQF_TRIGGER_RISING | 285173970055SRussell King IRQF_TRIGGER_FALLING, 28525411ca71SChris Healy sfp_irq_name, sfp); 2853257c2559SRobert Hancock if (err) { 2854257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2855f3c9a666SRussell King sfp->need_poll = true; 285673970055SRussell King } 2857257c2559SRobert Hancock } 285873970055SRussell King 2859f3c9a666SRussell King if (sfp->need_poll) 286073970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 286173970055SRussell King 2862a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2863a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2864a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2865a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2866a1f5d1f0SAntoine Tenart */ 2867a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2868a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2869a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2870a1f5d1f0SAntoine Tenart 2871b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2872b5bfc21aSRussell King if (!sfp->sfp_bus) 2873b5bfc21aSRussell King return -ENOMEM; 2874b5bfc21aSRussell King 28759cc8976cSRussell King sfp_debugfs_init(sfp); 28769cc8976cSRussell King 287773970055SRussell King return 0; 287873970055SRussell King } 287973970055SRussell King 288073970055SRussell King static int sfp_remove(struct platform_device *pdev) 288173970055SRussell King { 288273970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 288373970055SRussell King 28849cc8976cSRussell King sfp_debugfs_exit(sfp); 288573970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 288673970055SRussell King 28870cb96b57SRussell King rtnl_lock(); 28880cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 28890cb96b57SRussell King rtnl_unlock(); 28900cb96b57SRussell King 289173970055SRussell King return 0; 289273970055SRussell King } 289373970055SRussell King 2894257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2895257c2559SRobert Hancock { 2896257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2897257c2559SRobert Hancock int i; 2898257c2559SRobert Hancock 2899257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2900257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2901257c2559SRobert Hancock continue; 2902257c2559SRobert Hancock 2903257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2904257c2559SRobert Hancock } 2905257c2559SRobert Hancock 2906257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2907257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2908257c2559SRobert Hancock } 2909257c2559SRobert Hancock 291073970055SRussell King static struct platform_driver sfp_driver = { 291173970055SRussell King .probe = sfp_probe, 291273970055SRussell King .remove = sfp_remove, 2913257c2559SRobert Hancock .shutdown = sfp_shutdown, 291473970055SRussell King .driver = { 291573970055SRussell King .name = "sfp", 291673970055SRussell King .of_match_table = sfp_of_match, 291773970055SRussell King }, 291873970055SRussell King }; 291973970055SRussell King 292073970055SRussell King static int sfp_init(void) 292173970055SRussell King { 292273970055SRussell King poll_jiffies = msecs_to_jiffies(100); 292373970055SRussell King 292473970055SRussell King return platform_driver_register(&sfp_driver); 292573970055SRussell King } 292673970055SRussell King module_init(sfp_init); 292773970055SRussell King 292873970055SRussell King static void sfp_exit(void) 292973970055SRussell King { 293073970055SRussell King platform_driver_unregister(&sfp_driver); 293173970055SRussell King } 293273970055SRussell King module_exit(sfp_exit); 293373970055SRussell King 293473970055SRussell King MODULE_ALIAS("platform:sfp"); 293573970055SRussell King MODULE_AUTHOR("Russell King"); 293673970055SRussell King MODULE_LICENSE("GPL v2"); 2937