1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 27ce236faSRuslan Babayev #include <linux/acpi.h> 31323061aSAndrew Lunn #include <linux/ctype.h> 49cc8976cSRussell King #include <linux/debugfs.h> 573970055SRussell King #include <linux/delay.h> 654a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 71323061aSAndrew Lunn #include <linux/hwmon.h> 873970055SRussell King #include <linux/i2c.h> 973970055SRussell King #include <linux/interrupt.h> 1073970055SRussell King #include <linux/jiffies.h> 11fcba68bdSAndrew Lunn #include <linux/mdio/mdio-i2c.h> 1273970055SRussell King #include <linux/module.h> 1373970055SRussell King #include <linux/mutex.h> 1473970055SRussell King #include <linux/of.h> 1573970055SRussell King #include <linux/phy.h> 1673970055SRussell King #include <linux/platform_device.h> 1773970055SRussell King #include <linux/rtnetlink.h> 1873970055SRussell King #include <linux/slab.h> 1973970055SRussell King #include <linux/workqueue.h> 2073970055SRussell King 2173970055SRussell King #include "sfp.h" 2273970055SRussell King #include "swphy.h" 2373970055SRussell King 2473970055SRussell King enum { 2573970055SRussell King GPIO_MODDEF0, 2673970055SRussell King GPIO_LOS, 2773970055SRussell King GPIO_TX_FAULT, 2873970055SRussell King GPIO_TX_DISABLE, 2973970055SRussell King GPIO_RATE_SELECT, 3073970055SRussell King GPIO_MAX, 3173970055SRussell King 3273970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3373970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3473970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3573970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3673970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3773970055SRussell King 3873970055SRussell King SFP_E_INSERT = 0, 3973970055SRussell King SFP_E_REMOVE, 406b0da5c9SRussell King SFP_E_DEV_ATTACH, 416b0da5c9SRussell King SFP_E_DEV_DETACH, 4273970055SRussell King SFP_E_DEV_DOWN, 4373970055SRussell King SFP_E_DEV_UP, 4473970055SRussell King SFP_E_TX_FAULT, 4573970055SRussell King SFP_E_TX_CLEAR, 4673970055SRussell King SFP_E_LOS_HIGH, 4773970055SRussell King SFP_E_LOS_LOW, 4873970055SRussell King SFP_E_TIMEOUT, 4973970055SRussell King 5073970055SRussell King SFP_MOD_EMPTY = 0, 5173f5e847SRussell King SFP_MOD_ERROR, 5273970055SRussell King SFP_MOD_PROBE, 5373f5e847SRussell King SFP_MOD_WAITDEV, 543bb35261SJon Nettleton SFP_MOD_HPOWER, 55b036a554SRussell King SFP_MOD_WAITPWR, 5673970055SRussell King SFP_MOD_PRESENT, 5773970055SRussell King 586b0da5c9SRussell King SFP_DEV_DETACHED = 0, 596b0da5c9SRussell King SFP_DEV_DOWN, 6073970055SRussell King SFP_DEV_UP, 6173970055SRussell King 6273970055SRussell King SFP_S_DOWN = 0, 6374c551caSRussell King SFP_S_FAIL, 64eefa6f1fSRussell King SFP_S_WAIT, 6573970055SRussell King SFP_S_INIT, 661cb89a14SRussell King SFP_S_INIT_PHY, 67d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6873970055SRussell King SFP_S_WAIT_LOS, 6973970055SRussell King SFP_S_LINK_UP, 7073970055SRussell King SFP_S_TX_FAULT, 7173970055SRussell King SFP_S_REINIT, 7273970055SRussell King SFP_S_TX_DISABLE, 7373970055SRussell King }; 7473970055SRussell King 754005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 764005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7773f5e847SRussell King [SFP_MOD_ERROR] = "error", 784005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7973f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 804005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 81b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 824005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 834005a7cbSAndrew Lunn }; 844005a7cbSAndrew Lunn 854005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 864005a7cbSAndrew Lunn { 874005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 884005a7cbSAndrew Lunn return "Unknown module state"; 894005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 904005a7cbSAndrew Lunn } 914005a7cbSAndrew Lunn 924005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 936b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 944005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 954005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 964005a7cbSAndrew Lunn }; 974005a7cbSAndrew Lunn 984005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 994005a7cbSAndrew Lunn { 1004005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 1014005a7cbSAndrew Lunn return "Unknown device state"; 1024005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1034005a7cbSAndrew Lunn } 1044005a7cbSAndrew Lunn 1054005a7cbSAndrew Lunn static const char * const event_strings[] = { 1064005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1074005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1086b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1096b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1104005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1114005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1124005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1134005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1144005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1154005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1164005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1174005a7cbSAndrew Lunn }; 1184005a7cbSAndrew Lunn 1194005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1204005a7cbSAndrew Lunn { 1214005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1224005a7cbSAndrew Lunn return "Unknown event"; 1234005a7cbSAndrew Lunn return event_strings[event]; 1244005a7cbSAndrew Lunn } 1254005a7cbSAndrew Lunn 1264005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1274005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 12874c551caSRussell King [SFP_S_FAIL] = "fail", 129eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1304005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1311cb89a14SRussell King [SFP_S_INIT_PHY] = "init_phy", 132d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1334005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1344005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1354005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1364005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 13725a9da66SSean Anderson [SFP_S_TX_DISABLE] = "tx_disable", 1384005a7cbSAndrew Lunn }; 1394005a7cbSAndrew Lunn 1404005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1414005a7cbSAndrew Lunn { 1424005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1434005a7cbSAndrew Lunn return "Unknown state"; 1444005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1454005a7cbSAndrew Lunn } 1464005a7cbSAndrew Lunn 14773970055SRussell King static const char *gpio_of_names[] = { 14825ee0793SBaruch Siach "mod-def0", 14973970055SRussell King "los", 15073970055SRussell King "tx-fault", 15173970055SRussell King "tx-disable", 15225ee0793SBaruch Siach "rate-select0", 15373970055SRussell King }; 15473970055SRussell King 15573970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15673970055SRussell King GPIOD_IN, 15773970055SRussell King GPIOD_IN, 15873970055SRussell King GPIOD_IN, 15973970055SRussell King GPIOD_ASIS, 16073970055SRussell King GPIOD_ASIS, 16173970055SRussell King }; 16273970055SRussell King 16326c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16426c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16526c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 16626c97a2dSRussell King * on board (for a copper SFP) time to initialise. 16726c97a2dSRussell King */ 168eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 16926c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 17026c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17126c97a2dSRussell King 17226c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17326c97a2dSRussell King * an indicated TX_FAULT. 17426c97a2dSRussell King */ 17573970055SRussell King #define T_RESET_US 10 17673970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 17773970055SRussell King 17865ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 17965ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 18065ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18165ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18265ef2d5cSRussell King */ 18365ef2d5cSRussell King #define N_FAULT_INIT 5 18465ef2d5cSRussell King #define N_FAULT 5 18565ef2d5cSRussell King 1861cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1871cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1881cb89a14SRussell King */ 1891cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1901cb89a14SRussell King #define R_PHY_RETRY 12 1911cb89a14SRussell King 19273970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19373970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19473970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 19573970055SRussell King * 196d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 197d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 19873970055SRussell King */ 199d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 2003bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 201e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 202e117be74SRussell King #define R_PROBE_RETRY_INIT 10 203e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 204e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 20573970055SRussell King 206516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 20773970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 20873970055SRussell King */ 20973970055SRussell King #define SFP_PHY_ADDR 22 21073970055SRussell King 211259c8618SRussell King struct sff_data { 212259c8618SRussell King unsigned int gpios; 213259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 214259c8618SRussell King }; 215259c8618SRussell King 21673970055SRussell King struct sfp { 21773970055SRussell King struct device *dev; 21873970055SRussell King struct i2c_adapter *i2c; 21973970055SRussell King struct mii_bus *i2c_mii; 22073970055SRussell King struct sfp_bus *sfp_bus; 22173970055SRussell King struct phy_device *mod_phy; 222259c8618SRussell King const struct sff_data *type; 2230d035bedSRussell King size_t i2c_block_size; 2243bb35261SJon Nettleton u32 max_power_mW; 22573970055SRussell King 22673970055SRussell King unsigned int (*get_state)(struct sfp *); 22773970055SRussell King void (*set_state)(struct sfp *, unsigned int); 22873970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2293bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 23073970055SRussell King 23173970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 232257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 23373970055SRussell King 234f3c9a666SRussell King bool need_poll; 235f3c9a666SRussell King 2362158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 237f3c9a666SRussell King unsigned int state_soft_mask; 23873970055SRussell King unsigned int state; 23973970055SRussell King struct delayed_work poll; 24073970055SRussell King struct delayed_work timeout; 2412158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 24273970055SRussell King unsigned char sm_mod_state; 243e117be74SRussell King unsigned char sm_mod_tries_init; 244e117be74SRussell King unsigned char sm_mod_tries; 24573970055SRussell King unsigned char sm_dev_state; 24673970055SRussell King unsigned short sm_state; 247281e4eabSRussell King unsigned char sm_fault_retries; 2481cb89a14SRussell King unsigned char sm_phy_retries; 24973970055SRussell King 25073970055SRussell King struct sfp_eeprom_id id; 251ed32abb1SRussell King unsigned int module_power_mW; 25226c97a2dSRussell King unsigned int module_t_start_up; 2532069624dSMatthew Hagan bool tx_fault_ignore; 254ed32abb1SRussell King 2551323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2561323061aSAndrew Lunn struct sfp_diag diag; 257139d3a21SRussell King struct delayed_work hwmon_probe; 258139d3a21SRussell King unsigned int hwmon_tries; 2591323061aSAndrew Lunn struct device *hwmon_dev; 2601323061aSAndrew Lunn char *hwmon_name; 2611323061aSAndrew Lunn #endif 2621323061aSAndrew Lunn 2639cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2649cc8976cSRussell King struct dentry *debugfs_dir; 2659cc8976cSRussell King #endif 26673970055SRussell King }; 26773970055SRussell King 268259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 269259c8618SRussell King { 2700fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 271259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 272259c8618SRussell King } 273259c8618SRussell King 274259c8618SRussell King static const struct sff_data sff_data = { 275259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 276259c8618SRussell King .module_supported = sff_module_supported, 277259c8618SRussell King }; 278259c8618SRussell King 279259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 280259c8618SRussell King { 281f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 282f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 283f0b4f847SPali Rohár return true; 284f0b4f847SPali Rohár 285f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 286f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 287f0b4f847SPali Rohár * as supported based on vendor name and pn match. 288f0b4f847SPali Rohár */ 289f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 290f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 291f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 292f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 293f0b4f847SPali Rohár return true; 294f0b4f847SPali Rohár 295f0b4f847SPali Rohár return false; 296259c8618SRussell King } 297259c8618SRussell King 298259c8618SRussell King static const struct sff_data sfp_data = { 299259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 300259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 301259c8618SRussell King .module_supported = sfp_module_supported, 302259c8618SRussell King }; 303259c8618SRussell King 304259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 305259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 306259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 307259c8618SRussell King { }, 308259c8618SRussell King }; 309259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 310259c8618SRussell King 31173970055SRussell King static unsigned long poll_jiffies; 31273970055SRussell King 31373970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 31473970055SRussell King { 31573970055SRussell King unsigned int i, state, v; 31673970055SRussell King 31773970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 31873970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 31973970055SRussell King continue; 32073970055SRussell King 32173970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 32273970055SRussell King if (v) 32373970055SRussell King state |= BIT(i); 32473970055SRussell King } 32573970055SRussell King 32673970055SRussell King return state; 32773970055SRussell King } 32873970055SRussell King 329259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 330259c8618SRussell King { 331259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 332259c8618SRussell King } 333259c8618SRussell King 33473970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 33573970055SRussell King { 33673970055SRussell King if (state & SFP_F_PRESENT) { 33773970055SRussell King /* If the module is present, drive the signals */ 33873970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 33973970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 34073970055SRussell King state & SFP_F_TX_DISABLE); 34173970055SRussell King if (state & SFP_F_RATE_SELECT) 34273970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 34373970055SRussell King state & SFP_F_RATE_SELECT); 34473970055SRussell King } else { 34573970055SRussell King /* Otherwise, let them float to the pull-ups */ 34673970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 34773970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 34873970055SRussell King if (state & SFP_F_RATE_SELECT) 34973970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 35073970055SRussell King } 35173970055SRussell King } 35273970055SRussell King 3533bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3543bb35261SJon Nettleton size_t len) 35573970055SRussell King { 35673970055SRussell King struct i2c_msg msgs[2]; 357426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 358426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 35928e74a7cSRussell King size_t this_len; 36073970055SRussell King int ret; 36173970055SRussell King 36273970055SRussell King msgs[0].addr = bus_addr; 36373970055SRussell King msgs[0].flags = 0; 36473970055SRussell King msgs[0].len = 1; 36573970055SRussell King msgs[0].buf = &dev_addr; 36673970055SRussell King msgs[1].addr = bus_addr; 36773970055SRussell King msgs[1].flags = I2C_M_RD; 36873970055SRussell King msgs[1].len = len; 36973970055SRussell King msgs[1].buf = buf; 37073970055SRussell King 37128e74a7cSRussell King while (len) { 37228e74a7cSRussell King this_len = len; 3730d035bedSRussell King if (this_len > block_size) 3740d035bedSRussell King this_len = block_size; 37528e74a7cSRussell King 37628e74a7cSRussell King msgs[1].len = this_len; 37728e74a7cSRussell King 3783bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 37973970055SRussell King if (ret < 0) 38073970055SRussell King return ret; 38173970055SRussell King 38228e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 38328e74a7cSRussell King break; 38428e74a7cSRussell King 38528e74a7cSRussell King msgs[1].buf += this_len; 38628e74a7cSRussell King dev_addr += this_len; 38728e74a7cSRussell King len -= this_len; 38828e74a7cSRussell King } 38928e74a7cSRussell King 39028e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 39173970055SRussell King } 39273970055SRussell King 3933bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 39473970055SRussell King size_t len) 39573970055SRussell King { 3963bb35261SJon Nettleton struct i2c_msg msgs[1]; 3973bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3983bb35261SJon Nettleton int ret; 3993bb35261SJon Nettleton 4003bb35261SJon Nettleton msgs[0].addr = bus_addr; 4013bb35261SJon Nettleton msgs[0].flags = 0; 4023bb35261SJon Nettleton msgs[0].len = 1 + len; 4033bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 4043bb35261SJon Nettleton if (!msgs[0].buf) 4053bb35261SJon Nettleton return -ENOMEM; 4063bb35261SJon Nettleton 4073bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 4083bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 4093bb35261SJon Nettleton 4103bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 4113bb35261SJon Nettleton 4123bb35261SJon Nettleton kfree(msgs[0].buf); 4133bb35261SJon Nettleton 4143bb35261SJon Nettleton if (ret < 0) 4153bb35261SJon Nettleton return ret; 4163bb35261SJon Nettleton 4173bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 41873970055SRussell King } 41973970055SRussell King 42073970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 42173970055SRussell King { 42273970055SRussell King struct mii_bus *i2c_mii; 42373970055SRussell King int ret; 42473970055SRussell King 42573970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 42673970055SRussell King return -EINVAL; 42773970055SRussell King 42873970055SRussell King sfp->i2c = i2c; 42973970055SRussell King sfp->read = sfp_i2c_read; 4303bb35261SJon Nettleton sfp->write = sfp_i2c_write; 43173970055SRussell King 43273970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 43373970055SRussell King if (IS_ERR(i2c_mii)) 43473970055SRussell King return PTR_ERR(i2c_mii); 43573970055SRussell King 43673970055SRussell King i2c_mii->name = "SFP I2C Bus"; 43773970055SRussell King i2c_mii->phy_mask = ~0; 43873970055SRussell King 43973970055SRussell King ret = mdiobus_register(i2c_mii); 44073970055SRussell King if (ret < 0) { 44173970055SRussell King mdiobus_free(i2c_mii); 44273970055SRussell King return ret; 44373970055SRussell King } 44473970055SRussell King 44573970055SRussell King sfp->i2c_mii = i2c_mii; 44673970055SRussell King 44773970055SRussell King return 0; 44873970055SRussell King } 44973970055SRussell King 45073970055SRussell King /* Interface */ 45173970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 45273970055SRussell King { 45373970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 45473970055SRussell King } 45573970055SRussell King 4563bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4573bb35261SJon Nettleton { 4583bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4593bb35261SJon Nettleton } 4603bb35261SJon Nettleton 461f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 462f3c9a666SRussell King { 463f3c9a666SRussell King unsigned int state = 0; 464f3c9a666SRussell King u8 status; 4650dea4d03SRussell King int ret; 466f3c9a666SRussell King 4670dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 4680dea4d03SRussell King if (ret == sizeof(status)) { 469f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 470f3c9a666SRussell King state |= SFP_F_LOS; 471f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 472f3c9a666SRussell King state |= SFP_F_TX_FAULT; 4730dea4d03SRussell King } else { 4740dea4d03SRussell King dev_err_ratelimited(sfp->dev, 4759ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 4769ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 4770dea4d03SRussell King /* Preserve the current state */ 4780dea4d03SRussell King state = sfp->state; 479f3c9a666SRussell King } 480f3c9a666SRussell King 481f3c9a666SRussell King return state & sfp->state_soft_mask; 482f3c9a666SRussell King } 483f3c9a666SRussell King 484f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 485f3c9a666SRussell King { 486f3c9a666SRussell King u8 status; 487f3c9a666SRussell King 488f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 489f3c9a666SRussell King sizeof(status)) { 490f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 491f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 492f3c9a666SRussell King else 493f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 494f3c9a666SRussell King 495f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 496f3c9a666SRussell King } 497f3c9a666SRussell King } 498f3c9a666SRussell King 499f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 500f3c9a666SRussell King { 501f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 502f3c9a666SRussell King 503f3c9a666SRussell King sfp->state_soft_mask = 0; 504f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && 505f3c9a666SRussell King !sfp->gpio[GPIO_TX_DISABLE]) 506f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_DISABLE; 507f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && 508f3c9a666SRussell King !sfp->gpio[GPIO_TX_FAULT]) 509f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_FAULT; 510f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && 511f3c9a666SRussell King !sfp->gpio[GPIO_LOS]) 512f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_LOS; 513f3c9a666SRussell King 514f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 515f3c9a666SRussell King !sfp->need_poll) 516f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 517f3c9a666SRussell King } 518f3c9a666SRussell King 519f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 520f3c9a666SRussell King { 521f3c9a666SRussell King sfp->state_soft_mask = 0; 522f3c9a666SRussell King } 523f3c9a666SRussell King 524f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 525f3c9a666SRussell King { 526f3c9a666SRussell King unsigned int state = sfp->get_state(sfp); 527f3c9a666SRussell King 528f3c9a666SRussell King if (state & SFP_F_PRESENT && 529f3c9a666SRussell King sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) 530f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 531f3c9a666SRussell King 532f3c9a666SRussell King return state; 533f3c9a666SRussell King } 534f3c9a666SRussell King 535f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 536f3c9a666SRussell King { 537f3c9a666SRussell King sfp->set_state(sfp, state); 538f3c9a666SRussell King 539f3c9a666SRussell King if (state & SFP_F_PRESENT && 540f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 541f3c9a666SRussell King sfp_soft_set_state(sfp, state); 542f3c9a666SRussell King } 543f3c9a666SRussell King 54473970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 54573970055SRussell King { 54673970055SRussell King u8 *p, check; 54773970055SRussell King 54873970055SRussell King for (p = buf, check = 0; len; p++, len--) 54973970055SRussell King check += *p; 55073970055SRussell King 55173970055SRussell King return check; 55273970055SRussell King } 55373970055SRussell King 5541323061aSAndrew Lunn /* hwmon */ 5551323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 5561323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5571323061aSAndrew Lunn enum hwmon_sensor_types type, 5581323061aSAndrew Lunn u32 attr, int channel) 5591323061aSAndrew Lunn { 5601323061aSAndrew Lunn const struct sfp *sfp = data; 5611323061aSAndrew Lunn 5621323061aSAndrew Lunn switch (type) { 5631323061aSAndrew Lunn case hwmon_temp: 5641323061aSAndrew Lunn switch (attr) { 5651323061aSAndrew Lunn case hwmon_temp_min_alarm: 5661323061aSAndrew Lunn case hwmon_temp_max_alarm: 5671323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5681323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5691323061aSAndrew Lunn case hwmon_temp_min: 5701323061aSAndrew Lunn case hwmon_temp_max: 5711323061aSAndrew Lunn case hwmon_temp_lcrit: 5721323061aSAndrew Lunn case hwmon_temp_crit: 573a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 574a33710bdSAndrew Lunn return 0; 575df561f66SGustavo A. R. Silva fallthrough; 576a33710bdSAndrew Lunn case hwmon_temp_input: 577c1236979SAndrew Lunn case hwmon_temp_label: 5781323061aSAndrew Lunn return 0444; 5791323061aSAndrew Lunn default: 5801323061aSAndrew Lunn return 0; 5811323061aSAndrew Lunn } 5821323061aSAndrew Lunn case hwmon_in: 5831323061aSAndrew Lunn switch (attr) { 5841323061aSAndrew Lunn case hwmon_in_min_alarm: 5851323061aSAndrew Lunn case hwmon_in_max_alarm: 5861323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5871323061aSAndrew Lunn case hwmon_in_crit_alarm: 5881323061aSAndrew Lunn case hwmon_in_min: 5891323061aSAndrew Lunn case hwmon_in_max: 5901323061aSAndrew Lunn case hwmon_in_lcrit: 5911323061aSAndrew Lunn case hwmon_in_crit: 592a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 593a33710bdSAndrew Lunn return 0; 594df561f66SGustavo A. R. Silva fallthrough; 595a33710bdSAndrew Lunn case hwmon_in_input: 596c1236979SAndrew Lunn case hwmon_in_label: 5971323061aSAndrew Lunn return 0444; 5981323061aSAndrew Lunn default: 5991323061aSAndrew Lunn return 0; 6001323061aSAndrew Lunn } 6011323061aSAndrew Lunn case hwmon_curr: 6021323061aSAndrew Lunn switch (attr) { 6031323061aSAndrew Lunn case hwmon_curr_min_alarm: 6041323061aSAndrew Lunn case hwmon_curr_max_alarm: 6051323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 6061323061aSAndrew Lunn case hwmon_curr_crit_alarm: 6071323061aSAndrew Lunn case hwmon_curr_min: 6081323061aSAndrew Lunn case hwmon_curr_max: 6091323061aSAndrew Lunn case hwmon_curr_lcrit: 6101323061aSAndrew Lunn case hwmon_curr_crit: 611a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 612a33710bdSAndrew Lunn return 0; 613df561f66SGustavo A. R. Silva fallthrough; 614a33710bdSAndrew Lunn case hwmon_curr_input: 615c1236979SAndrew Lunn case hwmon_curr_label: 6161323061aSAndrew Lunn return 0444; 6171323061aSAndrew Lunn default: 6181323061aSAndrew Lunn return 0; 6191323061aSAndrew Lunn } 6201323061aSAndrew Lunn case hwmon_power: 6211323061aSAndrew Lunn /* External calibration of receive power requires 6221323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 6231323061aSAndrew Lunn * is not easy, so just skip it. If the module does 6241323061aSAndrew Lunn * not require external calibration, we can however 6251323061aSAndrew Lunn * show receiver power, since FP is then not needed. 6261323061aSAndrew Lunn */ 6271323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 6281323061aSAndrew Lunn channel == 1) 6291323061aSAndrew Lunn return 0; 6301323061aSAndrew Lunn switch (attr) { 6311323061aSAndrew Lunn case hwmon_power_min_alarm: 6321323061aSAndrew Lunn case hwmon_power_max_alarm: 6331323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 6341323061aSAndrew Lunn case hwmon_power_crit_alarm: 6351323061aSAndrew Lunn case hwmon_power_min: 6361323061aSAndrew Lunn case hwmon_power_max: 6371323061aSAndrew Lunn case hwmon_power_lcrit: 6381323061aSAndrew Lunn case hwmon_power_crit: 639a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 640a33710bdSAndrew Lunn return 0; 641df561f66SGustavo A. R. Silva fallthrough; 642a33710bdSAndrew Lunn case hwmon_power_input: 643c1236979SAndrew Lunn case hwmon_power_label: 6441323061aSAndrew Lunn return 0444; 6451323061aSAndrew Lunn default: 6461323061aSAndrew Lunn return 0; 6471323061aSAndrew Lunn } 6481323061aSAndrew Lunn default: 6491323061aSAndrew Lunn return 0; 6501323061aSAndrew Lunn } 6511323061aSAndrew Lunn } 6521323061aSAndrew Lunn 6531323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 6541323061aSAndrew Lunn { 6551323061aSAndrew Lunn __be16 val; 6561323061aSAndrew Lunn int err; 6571323061aSAndrew Lunn 6581323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6591323061aSAndrew Lunn if (err < 0) 6601323061aSAndrew Lunn return err; 6611323061aSAndrew Lunn 6621323061aSAndrew Lunn *value = be16_to_cpu(val); 6631323061aSAndrew Lunn 6641323061aSAndrew Lunn return 0; 6651323061aSAndrew Lunn } 6661323061aSAndrew Lunn 6671323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6681323061aSAndrew Lunn { 6690cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6701323061aSAndrew Lunn } 6711323061aSAndrew Lunn 6721323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6731323061aSAndrew Lunn long *value) 6741323061aSAndrew Lunn { 6751323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6761323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6771323061aSAndrew Lunn } 6781323061aSAndrew Lunn 6791323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6801323061aSAndrew Lunn { 6811323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6821323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6831323061aSAndrew Lunn 6841323061aSAndrew Lunn if (*value >= 0x8000) 6851323061aSAndrew Lunn *value -= 0x10000; 6861323061aSAndrew Lunn 6871323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6881323061aSAndrew Lunn } 6891323061aSAndrew Lunn 6901323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6911323061aSAndrew Lunn { 6921323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6931323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6941323061aSAndrew Lunn 6951323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6961323061aSAndrew Lunn } 6971323061aSAndrew Lunn 6981323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 6991323061aSAndrew Lunn { 7001323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 7011323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 7021323061aSAndrew Lunn 7031323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 7041323061aSAndrew Lunn } 7051323061aSAndrew Lunn 7061323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 7071323061aSAndrew Lunn { 7081323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 7091323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 7101323061aSAndrew Lunn 7111323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 7121323061aSAndrew Lunn } 7131323061aSAndrew Lunn 7141323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 7151323061aSAndrew Lunn { 7161323061aSAndrew Lunn int err; 7171323061aSAndrew Lunn 7181323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7191323061aSAndrew Lunn if (err < 0) 7201323061aSAndrew Lunn return err; 7211323061aSAndrew Lunn 7221323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7231323061aSAndrew Lunn 7241323061aSAndrew Lunn return 0; 7251323061aSAndrew Lunn } 7261323061aSAndrew Lunn 7271323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 7281323061aSAndrew Lunn { 7291323061aSAndrew Lunn int err; 7301323061aSAndrew Lunn 7311323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7321323061aSAndrew Lunn if (err < 0) 7331323061aSAndrew Lunn return err; 7341323061aSAndrew Lunn 7351323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7361323061aSAndrew Lunn 7371323061aSAndrew Lunn return 0; 7381323061aSAndrew Lunn } 7391323061aSAndrew Lunn 7401323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 7411323061aSAndrew Lunn { 7421323061aSAndrew Lunn int err; 7431323061aSAndrew Lunn 7441323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7451323061aSAndrew Lunn if (err < 0) 7461323061aSAndrew Lunn return err; 7471323061aSAndrew Lunn 7481323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7491323061aSAndrew Lunn 7501323061aSAndrew Lunn return 0; 7511323061aSAndrew Lunn } 7521323061aSAndrew Lunn 7531323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 7541323061aSAndrew Lunn { 7551323061aSAndrew Lunn int err; 7561323061aSAndrew Lunn 7571323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7581323061aSAndrew Lunn if (err < 0) 7591323061aSAndrew Lunn return err; 7601323061aSAndrew Lunn 7611323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7621323061aSAndrew Lunn 7631323061aSAndrew Lunn return 0; 7641323061aSAndrew Lunn } 7651323061aSAndrew Lunn 7661323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7671323061aSAndrew Lunn { 7681323061aSAndrew Lunn int err; 7691323061aSAndrew Lunn 7701323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7711323061aSAndrew Lunn if (err < 0) 7721323061aSAndrew Lunn return err; 7731323061aSAndrew Lunn 7741323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7751323061aSAndrew Lunn 7761323061aSAndrew Lunn return 0; 7771323061aSAndrew Lunn } 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7801323061aSAndrew Lunn { 7811323061aSAndrew Lunn u8 status; 7821323061aSAndrew Lunn int err; 7831323061aSAndrew Lunn 7841323061aSAndrew Lunn switch (attr) { 7851323061aSAndrew Lunn case hwmon_temp_input: 7861323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7871323061aSAndrew Lunn 7881323061aSAndrew Lunn case hwmon_temp_lcrit: 7891323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7901323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7911323061aSAndrew Lunn return 0; 7921323061aSAndrew Lunn 7931323061aSAndrew Lunn case hwmon_temp_min: 7941323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7951323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7961323061aSAndrew Lunn return 0; 7971323061aSAndrew Lunn case hwmon_temp_max: 7981323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 7991323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8001323061aSAndrew Lunn return 0; 8011323061aSAndrew Lunn 8021323061aSAndrew Lunn case hwmon_temp_crit: 8031323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 8041323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8051323061aSAndrew Lunn return 0; 8061323061aSAndrew Lunn 8071323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 8081323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8091323061aSAndrew Lunn if (err < 0) 8101323061aSAndrew Lunn return err; 8111323061aSAndrew Lunn 8121323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 8131323061aSAndrew Lunn return 0; 8141323061aSAndrew Lunn 8151323061aSAndrew Lunn case hwmon_temp_min_alarm: 8161323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8171323061aSAndrew Lunn if (err < 0) 8181323061aSAndrew Lunn return err; 8191323061aSAndrew Lunn 8201323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 8211323061aSAndrew Lunn return 0; 8221323061aSAndrew Lunn 8231323061aSAndrew Lunn case hwmon_temp_max_alarm: 8241323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8251323061aSAndrew Lunn if (err < 0) 8261323061aSAndrew Lunn return err; 8271323061aSAndrew Lunn 8281323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 8291323061aSAndrew Lunn return 0; 8301323061aSAndrew Lunn 8311323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8331323061aSAndrew Lunn if (err < 0) 8341323061aSAndrew Lunn return err; 8351323061aSAndrew Lunn 8361323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 8371323061aSAndrew Lunn return 0; 8381323061aSAndrew Lunn default: 8391323061aSAndrew Lunn return -EOPNOTSUPP; 8401323061aSAndrew Lunn } 8411323061aSAndrew Lunn 8421323061aSAndrew Lunn return -EOPNOTSUPP; 8431323061aSAndrew Lunn } 8441323061aSAndrew Lunn 8451323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 8461323061aSAndrew Lunn { 8471323061aSAndrew Lunn u8 status; 8481323061aSAndrew Lunn int err; 8491323061aSAndrew Lunn 8501323061aSAndrew Lunn switch (attr) { 8511323061aSAndrew Lunn case hwmon_in_input: 8521323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 8531323061aSAndrew Lunn 8541323061aSAndrew Lunn case hwmon_in_lcrit: 8551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 8561323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8571323061aSAndrew Lunn return 0; 8581323061aSAndrew Lunn 8591323061aSAndrew Lunn case hwmon_in_min: 8601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8611323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8621323061aSAndrew Lunn return 0; 8631323061aSAndrew Lunn 8641323061aSAndrew Lunn case hwmon_in_max: 8651323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8661323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8671323061aSAndrew Lunn return 0; 8681323061aSAndrew Lunn 8691323061aSAndrew Lunn case hwmon_in_crit: 8701323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8711323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8721323061aSAndrew Lunn return 0; 8731323061aSAndrew Lunn 8741323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8761323061aSAndrew Lunn if (err < 0) 8771323061aSAndrew Lunn return err; 8781323061aSAndrew Lunn 8791323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8801323061aSAndrew Lunn return 0; 8811323061aSAndrew Lunn 8821323061aSAndrew Lunn case hwmon_in_min_alarm: 8831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8841323061aSAndrew Lunn if (err < 0) 8851323061aSAndrew Lunn return err; 8861323061aSAndrew Lunn 8871323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 8881323061aSAndrew Lunn return 0; 8891323061aSAndrew Lunn 8901323061aSAndrew Lunn case hwmon_in_max_alarm: 8911323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8921323061aSAndrew Lunn if (err < 0) 8931323061aSAndrew Lunn return err; 8941323061aSAndrew Lunn 8951323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8961323061aSAndrew Lunn return 0; 8971323061aSAndrew Lunn 8981323061aSAndrew Lunn case hwmon_in_crit_alarm: 8991323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9001323061aSAndrew Lunn if (err < 0) 9011323061aSAndrew Lunn return err; 9021323061aSAndrew Lunn 9031323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 9041323061aSAndrew Lunn return 0; 9051323061aSAndrew Lunn default: 9061323061aSAndrew Lunn return -EOPNOTSUPP; 9071323061aSAndrew Lunn } 9081323061aSAndrew Lunn 9091323061aSAndrew Lunn return -EOPNOTSUPP; 9101323061aSAndrew Lunn } 9111323061aSAndrew Lunn 9121323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 9131323061aSAndrew Lunn { 9141323061aSAndrew Lunn u8 status; 9151323061aSAndrew Lunn int err; 9161323061aSAndrew Lunn 9171323061aSAndrew Lunn switch (attr) { 9181323061aSAndrew Lunn case hwmon_curr_input: 9191323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 9201323061aSAndrew Lunn 9211323061aSAndrew Lunn case hwmon_curr_lcrit: 9221323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 9231323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9241323061aSAndrew Lunn return 0; 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn case hwmon_curr_min: 9271323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 9281323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9291323061aSAndrew Lunn return 0; 9301323061aSAndrew Lunn 9311323061aSAndrew Lunn case hwmon_curr_max: 9321323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 9331323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9341323061aSAndrew Lunn return 0; 9351323061aSAndrew Lunn 9361323061aSAndrew Lunn case hwmon_curr_crit: 9371323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 9381323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9391323061aSAndrew Lunn return 0; 9401323061aSAndrew Lunn 9411323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9421323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9431323061aSAndrew Lunn if (err < 0) 9441323061aSAndrew Lunn return err; 9451323061aSAndrew Lunn 9461323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 9471323061aSAndrew Lunn return 0; 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn case hwmon_curr_min_alarm: 9501323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9511323061aSAndrew Lunn if (err < 0) 9521323061aSAndrew Lunn return err; 9531323061aSAndrew Lunn 9541323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 9551323061aSAndrew Lunn return 0; 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn case hwmon_curr_max_alarm: 9581323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9591323061aSAndrew Lunn if (err < 0) 9601323061aSAndrew Lunn return err; 9611323061aSAndrew Lunn 9621323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9631323061aSAndrew Lunn return 0; 9641323061aSAndrew Lunn 9651323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9661323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9671323061aSAndrew Lunn if (err < 0) 9681323061aSAndrew Lunn return err; 9691323061aSAndrew Lunn 9701323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9711323061aSAndrew Lunn return 0; 9721323061aSAndrew Lunn default: 9731323061aSAndrew Lunn return -EOPNOTSUPP; 9741323061aSAndrew Lunn } 9751323061aSAndrew Lunn 9761323061aSAndrew Lunn return -EOPNOTSUPP; 9771323061aSAndrew Lunn } 9781323061aSAndrew Lunn 9791323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9801323061aSAndrew Lunn { 9811323061aSAndrew Lunn u8 status; 9821323061aSAndrew Lunn int err; 9831323061aSAndrew Lunn 9841323061aSAndrew Lunn switch (attr) { 9851323061aSAndrew Lunn case hwmon_power_input: 9861323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9871323061aSAndrew Lunn 9881323061aSAndrew Lunn case hwmon_power_lcrit: 9891323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9901323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9911323061aSAndrew Lunn return 0; 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn case hwmon_power_min: 9941323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9951323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9961323061aSAndrew Lunn return 0; 9971323061aSAndrew Lunn 9981323061aSAndrew Lunn case hwmon_power_max: 9991323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 10001323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10011323061aSAndrew Lunn return 0; 10021323061aSAndrew Lunn 10031323061aSAndrew Lunn case hwmon_power_crit: 10041323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 10051323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10061323061aSAndrew Lunn return 0; 10071323061aSAndrew Lunn 10081323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10091323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10101323061aSAndrew Lunn if (err < 0) 10111323061aSAndrew Lunn return err; 10121323061aSAndrew Lunn 10131323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 10141323061aSAndrew Lunn return 0; 10151323061aSAndrew Lunn 10161323061aSAndrew Lunn case hwmon_power_min_alarm: 10171323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10181323061aSAndrew Lunn if (err < 0) 10191323061aSAndrew Lunn return err; 10201323061aSAndrew Lunn 10211323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 10221323061aSAndrew Lunn return 0; 10231323061aSAndrew Lunn 10241323061aSAndrew Lunn case hwmon_power_max_alarm: 10251323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10261323061aSAndrew Lunn if (err < 0) 10271323061aSAndrew Lunn return err; 10281323061aSAndrew Lunn 10291323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 10301323061aSAndrew Lunn return 0; 10311323061aSAndrew Lunn 10321323061aSAndrew Lunn case hwmon_power_crit_alarm: 10331323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10341323061aSAndrew Lunn if (err < 0) 10351323061aSAndrew Lunn return err; 10361323061aSAndrew Lunn 10371323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 10381323061aSAndrew Lunn return 0; 10391323061aSAndrew Lunn default: 10401323061aSAndrew Lunn return -EOPNOTSUPP; 10411323061aSAndrew Lunn } 10421323061aSAndrew Lunn 10431323061aSAndrew Lunn return -EOPNOTSUPP; 10441323061aSAndrew Lunn } 10451323061aSAndrew Lunn 10461323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 10471323061aSAndrew Lunn { 10481323061aSAndrew Lunn u8 status; 10491323061aSAndrew Lunn int err; 10501323061aSAndrew Lunn 10511323061aSAndrew Lunn switch (attr) { 10521323061aSAndrew Lunn case hwmon_power_input: 10531323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 10541323061aSAndrew Lunn 10551323061aSAndrew Lunn case hwmon_power_lcrit: 10561323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10571323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10581323061aSAndrew Lunn return 0; 10591323061aSAndrew Lunn 10601323061aSAndrew Lunn case hwmon_power_min: 10611323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10621323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10631323061aSAndrew Lunn return 0; 10641323061aSAndrew Lunn 10651323061aSAndrew Lunn case hwmon_power_max: 10661323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10671323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10681323061aSAndrew Lunn return 0; 10691323061aSAndrew Lunn 10701323061aSAndrew Lunn case hwmon_power_crit: 10711323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10721323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10731323061aSAndrew Lunn return 0; 10741323061aSAndrew Lunn 10751323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10761323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10771323061aSAndrew Lunn if (err < 0) 10781323061aSAndrew Lunn return err; 10791323061aSAndrew Lunn 10801323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10811323061aSAndrew Lunn return 0; 10821323061aSAndrew Lunn 10831323061aSAndrew Lunn case hwmon_power_min_alarm: 10841323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10851323061aSAndrew Lunn if (err < 0) 10861323061aSAndrew Lunn return err; 10871323061aSAndrew Lunn 10881323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 10891323061aSAndrew Lunn return 0; 10901323061aSAndrew Lunn 10911323061aSAndrew Lunn case hwmon_power_max_alarm: 10921323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10931323061aSAndrew Lunn if (err < 0) 10941323061aSAndrew Lunn return err; 10951323061aSAndrew Lunn 10961323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 10971323061aSAndrew Lunn return 0; 10981323061aSAndrew Lunn 10991323061aSAndrew Lunn case hwmon_power_crit_alarm: 11001323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 11011323061aSAndrew Lunn if (err < 0) 11021323061aSAndrew Lunn return err; 11031323061aSAndrew Lunn 11041323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 11051323061aSAndrew Lunn return 0; 11061323061aSAndrew Lunn default: 11071323061aSAndrew Lunn return -EOPNOTSUPP; 11081323061aSAndrew Lunn } 11091323061aSAndrew Lunn 11101323061aSAndrew Lunn return -EOPNOTSUPP; 11111323061aSAndrew Lunn } 11121323061aSAndrew Lunn 11131323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 11141323061aSAndrew Lunn u32 attr, int channel, long *value) 11151323061aSAndrew Lunn { 11161323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 11171323061aSAndrew Lunn 11181323061aSAndrew Lunn switch (type) { 11191323061aSAndrew Lunn case hwmon_temp: 11201323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 11211323061aSAndrew Lunn case hwmon_in: 11221323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 11231323061aSAndrew Lunn case hwmon_curr: 11241323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 11251323061aSAndrew Lunn case hwmon_power: 11261323061aSAndrew Lunn switch (channel) { 11271323061aSAndrew Lunn case 0: 11281323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 11291323061aSAndrew Lunn case 1: 11301323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 11311323061aSAndrew Lunn default: 11321323061aSAndrew Lunn return -EOPNOTSUPP; 11331323061aSAndrew Lunn } 11341323061aSAndrew Lunn default: 11351323061aSAndrew Lunn return -EOPNOTSUPP; 11361323061aSAndrew Lunn } 11371323061aSAndrew Lunn } 11381323061aSAndrew Lunn 1139c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1140c1236979SAndrew Lunn "TX_power", 1141c1236979SAndrew Lunn "RX_power", 1142c1236979SAndrew Lunn }; 1143c1236979SAndrew Lunn 1144c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1145c1236979SAndrew Lunn enum hwmon_sensor_types type, 1146c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1147c1236979SAndrew Lunn { 1148c1236979SAndrew Lunn switch (type) { 1149c1236979SAndrew Lunn case hwmon_curr: 1150c1236979SAndrew Lunn switch (attr) { 1151c1236979SAndrew Lunn case hwmon_curr_label: 1152c1236979SAndrew Lunn *str = "bias"; 1153c1236979SAndrew Lunn return 0; 1154c1236979SAndrew Lunn default: 1155c1236979SAndrew Lunn return -EOPNOTSUPP; 1156c1236979SAndrew Lunn } 1157c1236979SAndrew Lunn break; 1158c1236979SAndrew Lunn case hwmon_temp: 1159c1236979SAndrew Lunn switch (attr) { 1160c1236979SAndrew Lunn case hwmon_temp_label: 1161c1236979SAndrew Lunn *str = "temperature"; 1162c1236979SAndrew Lunn return 0; 1163c1236979SAndrew Lunn default: 1164c1236979SAndrew Lunn return -EOPNOTSUPP; 1165c1236979SAndrew Lunn } 1166c1236979SAndrew Lunn break; 1167c1236979SAndrew Lunn case hwmon_in: 1168c1236979SAndrew Lunn switch (attr) { 1169c1236979SAndrew Lunn case hwmon_in_label: 1170c1236979SAndrew Lunn *str = "VCC"; 1171c1236979SAndrew Lunn return 0; 1172c1236979SAndrew Lunn default: 1173c1236979SAndrew Lunn return -EOPNOTSUPP; 1174c1236979SAndrew Lunn } 1175c1236979SAndrew Lunn break; 1176c1236979SAndrew Lunn case hwmon_power: 1177c1236979SAndrew Lunn switch (attr) { 1178c1236979SAndrew Lunn case hwmon_power_label: 1179c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1180c1236979SAndrew Lunn return 0; 1181c1236979SAndrew Lunn default: 1182c1236979SAndrew Lunn return -EOPNOTSUPP; 1183c1236979SAndrew Lunn } 1184c1236979SAndrew Lunn break; 1185c1236979SAndrew Lunn default: 1186c1236979SAndrew Lunn return -EOPNOTSUPP; 1187c1236979SAndrew Lunn } 1188c1236979SAndrew Lunn 1189c1236979SAndrew Lunn return -EOPNOTSUPP; 1190c1236979SAndrew Lunn } 1191c1236979SAndrew Lunn 11921323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11931323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11941323061aSAndrew Lunn .read = sfp_hwmon_read, 1195c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11961323061aSAndrew Lunn }; 11971323061aSAndrew Lunn 11981323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 11991323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 12001323061aSAndrew Lunn 0, 12011323061aSAndrew Lunn }; 12021323061aSAndrew Lunn 12031323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 12041323061aSAndrew Lunn .type = hwmon_chip, 12051323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 12061323061aSAndrew Lunn }; 12071323061aSAndrew Lunn 12081323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 12091323061aSAndrew Lunn HWMON_T_INPUT | 12101323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 12111323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 12121323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1213c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1214c1236979SAndrew Lunn HWMON_T_LABEL, 12151323061aSAndrew Lunn 0, 12161323061aSAndrew Lunn }; 12171323061aSAndrew Lunn 12181323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 12191323061aSAndrew Lunn .type = hwmon_temp, 12201323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 12211323061aSAndrew Lunn }; 12221323061aSAndrew Lunn 12231323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 12241323061aSAndrew Lunn HWMON_I_INPUT | 12251323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 12261323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 12271323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1228c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1229c1236979SAndrew Lunn HWMON_I_LABEL, 12301323061aSAndrew Lunn 0, 12311323061aSAndrew Lunn }; 12321323061aSAndrew Lunn 12331323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 12341323061aSAndrew Lunn .type = hwmon_in, 12351323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 12361323061aSAndrew Lunn }; 12371323061aSAndrew Lunn 12381323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 12391323061aSAndrew Lunn HWMON_C_INPUT | 12401323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 12411323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 12421323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1243c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1244c1236979SAndrew Lunn HWMON_C_LABEL, 12451323061aSAndrew Lunn 0, 12461323061aSAndrew Lunn }; 12471323061aSAndrew Lunn 12481323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 12491323061aSAndrew Lunn .type = hwmon_curr, 12501323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 12511323061aSAndrew Lunn }; 12521323061aSAndrew Lunn 12531323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 12541323061aSAndrew Lunn /* Transmit power */ 12551323061aSAndrew Lunn HWMON_P_INPUT | 12561323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12571323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12581323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1259c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1260c1236979SAndrew Lunn HWMON_P_LABEL, 12611323061aSAndrew Lunn /* Receive power */ 12621323061aSAndrew Lunn HWMON_P_INPUT | 12631323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12641323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12651323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1266c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1267c1236979SAndrew Lunn HWMON_P_LABEL, 12681323061aSAndrew Lunn 0, 12691323061aSAndrew Lunn }; 12701323061aSAndrew Lunn 12711323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 12721323061aSAndrew Lunn .type = hwmon_power, 12731323061aSAndrew Lunn .config = sfp_hwmon_power_config, 12741323061aSAndrew Lunn }; 12751323061aSAndrew Lunn 12761323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 12771323061aSAndrew Lunn &sfp_hwmon_chip, 12781323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 12791323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 12801323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 12811323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 12821323061aSAndrew Lunn NULL, 12831323061aSAndrew Lunn }; 12841323061aSAndrew Lunn 12851323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12861323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12871323061aSAndrew Lunn .info = sfp_hwmon_info, 12881323061aSAndrew Lunn }; 12891323061aSAndrew Lunn 1290139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12911323061aSAndrew Lunn { 1292139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12931323061aSAndrew Lunn int err, i; 12941323061aSAndrew Lunn 1295426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1296426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1297426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1298426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1299426c6cbcSPali Rohár * skip registration of hwmon device. 1300426c6cbcSPali Rohár */ 1301426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1302426c6cbcSPali Rohár dev_info(sfp->dev, 1303426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1304426c6cbcSPali Rohár dev_info(sfp->dev, 1305426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1306426c6cbcSPali Rohár return; 1307426c6cbcSPali Rohár } 1308426c6cbcSPali Rohár 1309139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1310139d3a21SRussell King if (err < 0) { 1311139d3a21SRussell King if (sfp->hwmon_tries--) { 1312139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1313139d3a21SRussell King T_PROBE_RETRY_SLOW); 1314139d3a21SRussell King } else { 13159ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 13169ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1317139d3a21SRussell King } 1318139d3a21SRussell King return; 1319139d3a21SRussell King } 1320139d3a21SRussell King 1321139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1322139d3a21SRussell King if (!sfp->hwmon_name) { 1323139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1324139d3a21SRussell King return; 1325139d3a21SRussell King } 1326139d3a21SRussell King 1327139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1328139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1329139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1330139d3a21SRussell King 1331139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1332139d3a21SRussell King sfp->hwmon_name, sfp, 1333139d3a21SRussell King &sfp_hwmon_chip_info, 1334139d3a21SRussell King NULL); 1335139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1336139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1337139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1338139d3a21SRussell King } 1339139d3a21SRussell King 1340139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1341139d3a21SRussell King { 13421323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 13431323061aSAndrew Lunn return 0; 13441323061aSAndrew Lunn 13451323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 13461323061aSAndrew Lunn return 0; 13471323061aSAndrew Lunn 13481323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 13491323061aSAndrew Lunn /* This driver in general does not support address 13501323061aSAndrew Lunn * change. 13511323061aSAndrew Lunn */ 13521323061aSAndrew Lunn return 0; 13531323061aSAndrew Lunn 1354139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1355139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 13561323061aSAndrew Lunn 1357139d3a21SRussell King return 0; 13581323061aSAndrew Lunn } 13591323061aSAndrew Lunn 13601323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13611323061aSAndrew Lunn { 1362139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13633e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13641323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13653e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13661323061aSAndrew Lunn kfree(sfp->hwmon_name); 13671323061aSAndrew Lunn } 13683e322474SAndrew Lunn } 1369139d3a21SRussell King 1370139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1371139d3a21SRussell King { 1372139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1373139d3a21SRussell King 1374139d3a21SRussell King return 0; 1375139d3a21SRussell King } 1376139d3a21SRussell King 1377139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1378139d3a21SRussell King { 1379139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1380139d3a21SRussell King } 13811323061aSAndrew Lunn #else 13821323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13831323061aSAndrew Lunn { 13841323061aSAndrew Lunn return 0; 13851323061aSAndrew Lunn } 13861323061aSAndrew Lunn 13871323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13881323061aSAndrew Lunn { 13891323061aSAndrew Lunn } 1390139d3a21SRussell King 1391139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1392139d3a21SRussell King { 1393139d3a21SRussell King return 0; 1394139d3a21SRussell King } 1395139d3a21SRussell King 1396139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1397139d3a21SRussell King { 1398139d3a21SRussell King } 13991323061aSAndrew Lunn #endif 14001323061aSAndrew Lunn 140173970055SRussell King /* Helpers */ 140273970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 140373970055SRussell King { 140473970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 140573970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 140673970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 140773970055SRussell King sfp_set_state(sfp, sfp->state); 140873970055SRussell King } 140973970055SRussell King 141073970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 141173970055SRussell King { 141273970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 141373970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 141473970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 141573970055SRussell King sfp_set_state(sfp, sfp->state); 141673970055SRussell King } 141773970055SRussell King 14189cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 14199cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 14209cc8976cSRussell King { 14219cc8976cSRussell King struct sfp *sfp = s->private; 14229cc8976cSRussell King 14239cc8976cSRussell King seq_printf(s, "Module state: %s\n", 14249cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 14259cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 14269cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 14279cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 14289cc8976cSRussell King seq_printf(s, "Device state: %s\n", 14299cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 14309cc8976cSRussell King seq_printf(s, "Main state: %s\n", 14319cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 14329cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 14339cc8976cSRussell King sfp->sm_fault_retries); 14349cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 14359cc8976cSRussell King sfp->sm_phy_retries); 14369cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 14379cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 14389cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 14399cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 14409cc8976cSRussell King return 0; 14419cc8976cSRussell King } 14429cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 14439cc8976cSRussell King 14449cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14459cc8976cSRussell King { 14469cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 14479cc8976cSRussell King 14489cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 14499cc8976cSRussell King &sfp_debug_state_fops); 14509cc8976cSRussell King } 14519cc8976cSRussell King 14529cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14539cc8976cSRussell King { 14549cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 14559cc8976cSRussell King } 14569cc8976cSRussell King #else 14579cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14589cc8976cSRussell King { 14599cc8976cSRussell King } 14609cc8976cSRussell King 14619cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14629cc8976cSRussell King { 14639cc8976cSRussell King } 14649cc8976cSRussell King #endif 14659cc8976cSRussell King 146673970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 146773970055SRussell King { 146873970055SRussell King unsigned int state = sfp->state; 146973970055SRussell King 147073970055SRussell King if (state & SFP_F_TX_DISABLE) 147173970055SRussell King return; 147273970055SRussell King 147373970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 147473970055SRussell King 147573970055SRussell King udelay(T_RESET_US); 147673970055SRussell King 147773970055SRussell King sfp_set_state(sfp, state); 147873970055SRussell King } 147973970055SRussell King 148073970055SRussell King /* SFP state machine */ 148173970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 148273970055SRussell King { 148373970055SRussell King if (timeout) 148473970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 148573970055SRussell King timeout); 148673970055SRussell King else 148773970055SRussell King cancel_delayed_work(&sfp->timeout); 148873970055SRussell King } 148973970055SRussell King 149073970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 149173970055SRussell King unsigned int timeout) 149273970055SRussell King { 149373970055SRussell King sfp->sm_state = state; 149473970055SRussell King sfp_sm_set_timer(sfp, timeout); 149573970055SRussell King } 149673970055SRussell King 14970936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1498516b29edSFlorian Fainelli unsigned int timeout) 149973970055SRussell King { 150073970055SRussell King sfp->sm_mod_state = state; 150173970055SRussell King sfp_sm_set_timer(sfp, timeout); 150273970055SRussell King } 150373970055SRussell King 150473970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 150573970055SRussell King { 150673970055SRussell King sfp_remove_phy(sfp->sfp_bus); 150773970055SRussell King phy_device_remove(sfp->mod_phy); 150873970055SRussell King phy_device_free(sfp->mod_phy); 150973970055SRussell King sfp->mod_phy = NULL; 151073970055SRussell King } 151173970055SRussell King 1512256e43cbSRussell King static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) 151373970055SRussell King { 151473970055SRussell King struct phy_device *phy; 151573970055SRussell King int err; 151673970055SRussell King 15179a484621SRussell King phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); 15181cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 15191cb89a14SRussell King return PTR_ERR(phy); 152020b56ed9SRussell King if (IS_ERR(phy)) { 15219ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1522256e43cbSRussell King return PTR_ERR(phy); 152373970055SRussell King } 152473970055SRussell King 15259a484621SRussell King err = phy_device_register(phy); 15269a484621SRussell King if (err) { 15279a484621SRussell King phy_device_free(phy); 15289ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 15299ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1530256e43cbSRussell King return err; 15319a484621SRussell King } 15329a484621SRussell King 153373970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 153473970055SRussell King if (err) { 153573970055SRussell King phy_device_remove(phy); 153673970055SRussell King phy_device_free(phy); 15379ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1538256e43cbSRussell King return err; 153973970055SRussell King } 154073970055SRussell King 154173970055SRussell King sfp->mod_phy = phy; 1542256e43cbSRussell King 1543256e43cbSRussell King return 0; 154473970055SRussell King } 154573970055SRussell King 154673970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 154773970055SRussell King { 154873970055SRussell King sfp_link_up(sfp->sfp_bus); 154973970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 155073970055SRussell King } 155173970055SRussell King 155273970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 155373970055SRussell King { 155473970055SRussell King sfp_link_down(sfp->sfp_bus); 155573970055SRussell King } 155673970055SRussell King 155773970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 155873970055SRussell King { 1559624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1560624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1561624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1562624407d2SRussell King bool los = false; 156373970055SRussell King 1564710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1565624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1566624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 156773970055SRussell King */ 1568624407d2SRussell King if (los_options == los_inverted) 1569624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1570624407d2SRussell King else if (los_options == los_normal) 1571624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 157273970055SRussell King 157373970055SRussell King if (los) 157473970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 157573970055SRussell King else 157673970055SRussell King sfp_sm_link_up(sfp); 157773970055SRussell King } 157873970055SRussell King 1579710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1580710dfbb0SRussell King { 1581624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1582624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1583624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1584624407d2SRussell King 1585624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1586624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1587710dfbb0SRussell King } 1588710dfbb0SRussell King 1589710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1590710dfbb0SRussell King { 1591624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1592624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1593624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1594624407d2SRussell King 1595624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1596624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1597710dfbb0SRussell King } 1598710dfbb0SRussell King 159963ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 160073970055SRussell King { 1601281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1602516b29edSFlorian Fainelli dev_err(sfp->dev, 1603516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 160473970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 160573970055SRussell King } else { 160673970055SRussell King if (warn) 160773970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 160873970055SRussell King 160963ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 161073970055SRussell King } 161173970055SRussell King } 161273970055SRussell King 16139a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 16149a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 16159a484621SRussell King * or clause 45 PHY. 16169a484621SRussell King * 16179a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 16189a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 16199a484621SRussell King * PHY driver to determine. 16209a484621SRussell King * 16219a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 16229a484621SRussell King * mode according to the negotiated line speed. 16239a484621SRussell King */ 1624256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1625181f29daSRussell King { 1626256e43cbSRussell King int err = 0; 1627256e43cbSRussell King 16289a484621SRussell King switch (sfp->id.base.extended_cc) { 16299a484621SRussell King case SFF8024_ECC_10GBASE_T_SFI: 16309a484621SRussell King case SFF8024_ECC_10GBASE_T_SR: 16319a484621SRussell King case SFF8024_ECC_5GBASE_T: 16329a484621SRussell King case SFF8024_ECC_2_5GBASE_T: 1633256e43cbSRussell King err = sfp_sm_probe_phy(sfp, true); 16349a484621SRussell King break; 16359a484621SRussell King 16369a484621SRussell King default: 1637fa2de660SRussell King if (sfp->id.base.e1000_base_t) 1638256e43cbSRussell King err = sfp_sm_probe_phy(sfp, false); 16399a484621SRussell King break; 16409a484621SRussell King } 1641256e43cbSRussell King return err; 164273970055SRussell King } 164373970055SRussell King 1644ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 16453bb35261SJon Nettleton { 1646ed32abb1SRussell King u32 power_mW = 1000; 16475765cee1SRussell King (Oracle) bool supports_a2; 16483bb35261SJon Nettleton 16493bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1650ed32abb1SRussell King power_mW = 1500; 16513bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1652ed32abb1SRussell King power_mW = 2000; 16533bb35261SJon Nettleton 16545765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 16555765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 16565765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 16575765cee1SRussell King (Oracle) 1658ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 16597cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 16605765cee1SRussell King (Oracle) if (!supports_a2) { 16617cfa9c92SRussell King /* The module appears not to implement bus address 16627cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 16637cfa9c92SRussell King * indicated mode. 16647cfa9c92SRussell King */ 16653bb35261SJon Nettleton dev_err(sfp->dev, 16663bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1667ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16683bb35261SJon Nettleton return -EINVAL; 16697cfa9c92SRussell King } else { 16703bb35261SJon Nettleton dev_warn(sfp->dev, 16713bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1672ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16733bb35261SJon Nettleton return 0; 16743bb35261SJon Nettleton } 16757cfa9c92SRussell King } 16767cfa9c92SRussell King 16775765cee1SRussell King (Oracle) if (power_mW <= 1000) { 16785765cee1SRussell King (Oracle) /* Modules below 1W do not require a power change sequence */ 16795765cee1SRussell King (Oracle) sfp->module_power_mW = power_mW; 16805765cee1SRussell King (Oracle) return 0; 16815765cee1SRussell King (Oracle) } 16825765cee1SRussell King (Oracle) 16835765cee1SRussell King (Oracle) if (!supports_a2) { 16845765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 16855765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 16865765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 16875765cee1SRussell King (Oracle) */ 16885765cee1SRussell King (Oracle) return 0; 16895765cee1SRussell King (Oracle) } 16905765cee1SRussell King (Oracle) 16917cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 16927cfa9c92SRussell King * an address change sequence, warn the user that the module may 16937cfa9c92SRussell King * not be functional. 16947cfa9c92SRussell King */ 16955765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 16967cfa9c92SRussell King dev_warn(sfp->dev, 169707f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 16987cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 16997cfa9c92SRussell King return 0; 17007cfa9c92SRussell King } 17013bb35261SJon Nettleton 1702ed32abb1SRussell King sfp->module_power_mW = power_mW; 1703ed32abb1SRussell King 1704ed32abb1SRussell King return 0; 1705ed32abb1SRussell King } 1706ed32abb1SRussell King 1707b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1708ed32abb1SRussell King { 1709ed32abb1SRussell King u8 val; 1710ed32abb1SRussell King int err; 1711ed32abb1SRussell King 17123bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 17133bb35261SJon Nettleton if (err != sizeof(val)) { 17149ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "Failed to read EEPROM: %pe\n", ERR_PTR(err)); 1715b036a554SRussell King return -EAGAIN; 17163bb35261SJon Nettleton } 17173bb35261SJon Nettleton 17189a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 17199a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 17209a484621SRussell King * if the bit is already set, we're already in high power mode. 17219a484621SRussell King */ 17229a484621SRussell King if (!!(val & BIT(0)) == enable) 17239a484621SRussell King return 0; 17249a484621SRussell King 1725b036a554SRussell King if (enable) 17263bb35261SJon Nettleton val |= BIT(0); 1727b036a554SRussell King else 1728b036a554SRussell King val &= ~BIT(0); 17293bb35261SJon Nettleton 17303bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 17313bb35261SJon Nettleton if (err != sizeof(val)) { 17329ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "Failed to write EEPROM: %pe\n", 17339ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1734b036a554SRussell King return -EAGAIN; 17353bb35261SJon Nettleton } 17363bb35261SJon Nettleton 1737b036a554SRussell King if (enable) 17383bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1739ed32abb1SRussell King sfp->module_power_mW / 1000, 1740ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 17413bb35261SJon Nettleton 1742b036a554SRussell King return 0; 17433bb35261SJon Nettleton } 17443bb35261SJon Nettleton 1745426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1746426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1747426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1748426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1749426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1750426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1751426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1752426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1753426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1754426c6cbcSPali Rohár * at a time. 17550d035bedSRussell King */ 1756426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 17570d035bedSRussell King { 1758426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 17590d035bedSRussell King 1760426c6cbcSPali Rohár /* Already using byte IO */ 1761426c6cbcSPali Rohár if (block_size == 1) 1762426c6cbcSPali Rohár return false; 1763426c6cbcSPali Rohár 1764426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1765426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1766426c6cbcSPali Rohár return false; 17670d035bedSRussell King } 1768426c6cbcSPali Rohár return true; 17690d035bedSRussell King } 17700d035bedSRussell King 1771b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1772b18432c5SChris Healy { 1773b18432c5SChris Healy u8 check; 1774b18432c5SChris Healy int err; 1775b18432c5SChris Healy 1776b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1777b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1778b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1779b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1780b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1781b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1782b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1783b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1784b18432c5SChris Healy if (err != 3) { 17859ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 17869ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 17879ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1788b18432c5SChris Healy return err; 1789b18432c5SChris Healy } 1790b18432c5SChris Healy 1791b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1792b18432c5SChris Healy mdelay(50); 1793b18432c5SChris Healy 1794b18432c5SChris Healy /* Update base structure checksum */ 1795b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1796b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1797b18432c5SChris Healy if (err != 1) { 17989ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 17999ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 18009ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1801b18432c5SChris Healy return err; 1802b18432c5SChris Healy } 1803b18432c5SChris Healy } 1804b18432c5SChris Healy return 0; 1805b18432c5SChris Healy } 1806b18432c5SChris Healy 1807e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 180873970055SRussell King { 180973970055SRussell King /* SFP module inserted - read I2C data */ 181073970055SRussell King struct sfp_eeprom_id id; 1811b18432c5SChris Healy bool cotsworks_sfbg; 1812981f1f80SRussell King bool cotsworks; 181373970055SRussell King u8 check; 18143bb35261SJon Nettleton int ret; 181573970055SRussell King 1816426c6cbcSPali Rohár /* Some SFP modules and also some Linux I2C drivers do not like reads 1817426c6cbcSPali Rohár * longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at 1818426c6cbcSPali Rohár * a time. 18190d035bedSRussell King */ 1820426c6cbcSPali Rohár sfp->i2c_block_size = 16; 18210d035bedSRussell King 18220d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 18233bb35261SJon Nettleton if (ret < 0) { 1824e117be74SRussell King if (report) 18259ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 18269ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 182773970055SRussell King return -EAGAIN; 182873970055SRussell King } 182973970055SRussell King 18300d035bedSRussell King if (ret != sizeof(id.base)) { 18319ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 183273970055SRussell King return -EAGAIN; 183373970055SRussell King } 183473970055SRussell King 1835426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1836426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1837426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1838426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1839426c6cbcSPali Rohár * is really required and we have no other option. 1840426c6cbcSPali Rohár */ 1841426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1842426c6cbcSPali Rohár dev_info(sfp->dev, 1843426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1844426c6cbcSPali Rohár dev_info(sfp->dev, 1845426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1846426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1847426c6cbcSPali Rohár 1848426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1849426c6cbcSPali Rohár if (ret < 0) { 1850426c6cbcSPali Rohár if (report) 18519ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 18529ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 18539ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1854426c6cbcSPali Rohár return -EAGAIN; 1855426c6cbcSPali Rohár } 1856426c6cbcSPali Rohár 1857426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 18589ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 18599ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1860426c6cbcSPali Rohár return -EAGAIN; 1861426c6cbcSPali Rohár } 1862426c6cbcSPali Rohár } 1863426c6cbcSPali Rohár 1864981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1865981f1f80SRussell King * do the final programming with the final module part number, 1866981f1f80SRussell King * serial number and date code. 1867981f1f80SRussell King */ 1868981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1869b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1870b18432c5SChris Healy 1871b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1872b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1873b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1874b18432c5SChris Healy */ 1875b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1876b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1877b18432c5SChris Healy if (ret < 0) 1878b18432c5SChris Healy return ret; 1879b18432c5SChris Healy } 1880981f1f80SRussell King 188173970055SRussell King /* Validate the checksum over the base structure */ 188273970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 188373970055SRussell King if (check != id.base.cc_base) { 1884981f1f80SRussell King if (cotsworks) { 1885981f1f80SRussell King dev_warn(sfp->dev, 1886981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1887981f1f80SRussell King check, id.base.cc_base); 1888981f1f80SRussell King } else { 188973970055SRussell King dev_err(sfp->dev, 1890981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1891981f1f80SRussell King check, id.base.cc_base); 189273970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1893981f1f80SRussell King 16, 1, &id, sizeof(id), true); 189473970055SRussell King return -EINVAL; 189573970055SRussell King } 1896981f1f80SRussell King } 189773970055SRussell King 18980d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 18990d035bedSRussell King if (ret < 0) { 19000d035bedSRussell King if (report) 19019ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 19029ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 19030d035bedSRussell King return -EAGAIN; 19040d035bedSRussell King } 19050d035bedSRussell King 19060d035bedSRussell King if (ret != sizeof(id.ext)) { 19079ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 19080d035bedSRussell King return -EAGAIN; 19090d035bedSRussell King } 19100d035bedSRussell King 191173970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 191273970055SRussell King if (check != id.ext.cc_ext) { 1913981f1f80SRussell King if (cotsworks) { 1914981f1f80SRussell King dev_warn(sfp->dev, 1915981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1916981f1f80SRussell King check, id.ext.cc_ext); 1917981f1f80SRussell King } else { 191873970055SRussell King dev_err(sfp->dev, 1919981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1920981f1f80SRussell King check, id.ext.cc_ext); 1921981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1922981f1f80SRussell King 16, 1, &id, sizeof(id), true); 192373970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 192473970055SRussell King } 1925981f1f80SRussell King } 192673970055SRussell King 192773970055SRussell King sfp->id = id; 192873970055SRussell King 1929a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1930a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1931a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1932a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1933a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1934a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 193573970055SRussell King 1936259c8618SRussell King /* Check whether we support this module */ 1937f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1938259c8618SRussell King dev_err(sfp->dev, 1939259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 194073970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 194173970055SRussell King return -EINVAL; 194273970055SRussell King } 194373970055SRussell King 1944ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1945ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1946ec7681bdSRussell King dev_warn(sfp->dev, 1947ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1948ec7681bdSRussell King 1949ed32abb1SRussell King /* Parse the module power requirement */ 1950ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1951ed32abb1SRussell King if (ret < 0) 1952ed32abb1SRussell King return ret; 1953ed32abb1SRussell King 195426c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 195526c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 195626c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 195726c97a2dSRussell King else 195826c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 195926c97a2dSRussell King 19602069624dSMatthew Hagan if (!memcmp(id.base.vendor_name, "HUAWEI ", 16) && 19612069624dSMatthew Hagan !memcmp(id.base.vendor_pn, "MA5671A ", 16)) 19622069624dSMatthew Hagan sfp->tx_fault_ignore = true; 19632069624dSMatthew Hagan else 19642069624dSMatthew Hagan sfp->tx_fault_ignore = false; 19652069624dSMatthew Hagan 1966b036a554SRussell King return 0; 196773970055SRussell King } 196873970055SRussell King 196973970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 197073970055SRussell King { 197173f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 197273970055SRussell King sfp_module_remove(sfp->sfp_bus); 197373970055SRussell King 19741323061aSAndrew Lunn sfp_hwmon_remove(sfp); 19751323061aSAndrew Lunn 197673970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1977ed32abb1SRussell King sfp->module_power_mW = 0; 197873970055SRussell King 197973970055SRussell King dev_info(sfp->dev, "module removed\n"); 198073970055SRussell King } 198173970055SRussell King 19826b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1983e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 198473970055SRussell King { 1985e85d81a1SRussell King switch (sfp->sm_dev_state) { 1986e85d81a1SRussell King default: 19876b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 19886b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 19896b0da5c9SRussell King break; 19906b0da5c9SRussell King 19916b0da5c9SRussell King case SFP_DEV_DOWN: 19926b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 19936b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 19946b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1995e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1996e85d81a1SRussell King break; 199773970055SRussell King 1998e85d81a1SRussell King case SFP_DEV_UP: 19996b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 20006b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 20016b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 2002e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 2003e85d81a1SRussell King break; 2004e85d81a1SRussell King } 2005e85d81a1SRussell King } 200673970055SRussell King 2007d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2008d900954fSRussell King * the on-board EEPROM, and sets up the power level. 200973970055SRussell King */ 2010e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2011e85d81a1SRussell King { 2012b036a554SRussell King int err; 2013b036a554SRussell King 2014b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2015b036a554SRussell King if (event == SFP_E_REMOVE) { 2016d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2017d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2018b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2019b036a554SRussell King return; 2020b036a554SRussell King } 2021b036a554SRussell King 2022b036a554SRussell King /* Handle device detach globally */ 202373f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 202473f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2025b036a554SRussell King if (sfp->module_power_mW > 1000 && 2026b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2027b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 202873f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2029d2e816c0SRussell King return; 2030d2e816c0SRussell King } 2031d2e816c0SRussell King 203273970055SRussell King switch (sfp->sm_mod_state) { 203373970055SRussell King default: 2034e117be74SRussell King if (event == SFP_E_INSERT) { 2035d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2036e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2037e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2038e117be74SRussell King } 203973970055SRussell King break; 204073970055SRussell King 204173970055SRussell King case SFP_MOD_PROBE: 204273f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2043b036a554SRussell King if (event != SFP_E_TIMEOUT) 2044b036a554SRussell King break; 204573970055SRussell King 2046e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2047b036a554SRussell King if (err == -EAGAIN) { 2048e117be74SRussell King if (sfp->sm_mod_tries_init && 2049e117be74SRussell King --sfp->sm_mod_tries_init) { 2050e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2051b036a554SRussell King break; 2052e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2053e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2054e117be74SRussell King dev_warn(sfp->dev, 2055e117be74SRussell King "please wait, module slow to respond\n"); 2056e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2057e117be74SRussell King break; 2058e117be74SRussell King } 2059b036a554SRussell King } 2060b036a554SRussell King if (err < 0) { 2061b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2062b036a554SRussell King break; 2063b036a554SRussell King } 2064b036a554SRussell King 206538ecd706SRussell King err = sfp_hwmon_insert(sfp); 206638ecd706SRussell King if (err) 20679ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 20689ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 206938ecd706SRussell King 207073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2071df561f66SGustavo A. R. Silva fallthrough; 207273f5e847SRussell King case SFP_MOD_WAITDEV: 207373f5e847SRussell King /* Ensure that the device is attached before proceeding */ 207473f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 207573f5e847SRussell King break; 207673f5e847SRussell King 207773f5e847SRussell King /* Report the module insertion to the upstream device */ 207873f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 207973f5e847SRussell King if (err < 0) { 208073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 208173f5e847SRussell King break; 208273f5e847SRussell King } 208373f5e847SRussell King 2084b036a554SRussell King /* If this is a power level 1 module, we are done */ 2085b036a554SRussell King if (sfp->module_power_mW <= 1000) 2086b036a554SRussell King goto insert; 2087b036a554SRussell King 2088b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2089df561f66SGustavo A. R. Silva fallthrough; 2090b036a554SRussell King case SFP_MOD_HPOWER: 2091b036a554SRussell King /* Enable high power mode */ 2092b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 209373f5e847SRussell King if (err < 0) { 209473f5e847SRussell King if (err != -EAGAIN) { 209573f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 20960936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 209773f5e847SRussell King } else { 2098e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 209973f5e847SRussell King } 210073f5e847SRussell King break; 210173f5e847SRussell King } 210273f5e847SRussell King 210373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 210473970055SRussell King break; 210573970055SRussell King 2106b036a554SRussell King case SFP_MOD_WAITPWR: 2107b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2108b036a554SRussell King if (event != SFP_E_TIMEOUT) 2109b036a554SRussell King break; 2110b036a554SRussell King 2111b036a554SRussell King insert: 21120936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 21133bb35261SJon Nettleton break; 2114b036a554SRussell King 211573970055SRussell King case SFP_MOD_PRESENT: 211673970055SRussell King case SFP_MOD_ERROR: 211773970055SRussell King break; 211873970055SRussell King } 211973970055SRussell King } 212073970055SRussell King 2121e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2122e85d81a1SRussell King { 2123eefa6f1fSRussell King unsigned long timeout; 21241cb89a14SRussell King int ret; 2125eefa6f1fSRussell King 212673970055SRussell King /* Some events are global */ 212773970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 212873970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 212973970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 213073970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 213173970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 213273970055SRussell King sfp_sm_link_down(sfp); 213374c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 213474c551caSRussell King sfp_module_stop(sfp->sfp_bus); 213573970055SRussell King if (sfp->mod_phy) 213673970055SRussell King sfp_sm_phy_detach(sfp); 21371539e0d3SRussell King sfp_module_tx_disable(sfp); 2138f3c9a666SRussell King sfp_soft_stop_poll(sfp); 213973970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 214073970055SRussell King return; 214173970055SRussell King } 214273970055SRussell King 214373970055SRussell King /* The main state machine */ 214473970055SRussell King switch (sfp->sm_state) { 214573970055SRussell King case SFP_S_DOWN: 2146eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2147eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2148eefa6f1fSRussell King break; 2149eefa6f1fSRussell King 2150f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2151f3c9a666SRussell King sfp_soft_start_poll(sfp); 2152f3c9a666SRussell King 2153f3c9a666SRussell King sfp_module_tx_enable(sfp); 2154eefa6f1fSRussell King 2155eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2156281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2157eefa6f1fSRussell King 2158eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2159eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2160eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 2161eefa6f1fSRussell King */ 2162eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 2163eefa6f1fSRussell King break; 2164eefa6f1fSRussell King 2165eefa6f1fSRussell King case SFP_S_WAIT: 2166eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2167eefa6f1fSRussell King break; 2168eefa6f1fSRussell King 2169eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 217026c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 217126c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 217226c97a2dSRussell King * initialise, which is indicated by TX_FAULT 217326c97a2dSRussell King * deasserting. 2174181f29daSRussell King */ 217526c97a2dSRussell King timeout = sfp->module_t_start_up; 2176eefa6f1fSRussell King if (timeout > T_WAIT) 2177eefa6f1fSRussell King timeout -= T_WAIT; 2178eefa6f1fSRussell King else 2179eefa6f1fSRussell King timeout = 1; 2180eefa6f1fSRussell King 2181eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2182eefa6f1fSRussell King } else { 2183eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2184eefa6f1fSRussell King * finished initialising. 2185eefa6f1fSRussell King */ 2186eefa6f1fSRussell King goto init_done; 2187181f29daSRussell King } 218873970055SRussell King break; 218973970055SRussell King 219073970055SRussell King case SFP_S_INIT: 2191d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2192e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 219326c97a2dSRussell King * or t_start_up, so assume there is a fault. 2194d23751a0SRussell King */ 2195d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2196281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2197d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 21981cb89a14SRussell King init_done: 21991cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 22001cb89a14SRussell King goto phy_probe; 22011cb89a14SRussell King } 22021cb89a14SRussell King break; 22031cb89a14SRussell King 22041cb89a14SRussell King case SFP_S_INIT_PHY: 22051cb89a14SRussell King if (event != SFP_E_TIMEOUT) 22061cb89a14SRussell King break; 22071cb89a14SRussell King phy_probe: 22081cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2209d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2210d23751a0SRussell King */ 22111cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 22121cb89a14SRussell King if (ret == -ENODEV) { 22131cb89a14SRussell King if (--sfp->sm_phy_retries) { 22141cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 22151cb89a14SRussell King break; 22161cb89a14SRussell King } else { 22171cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 22181cb89a14SRussell King } 22191cb89a14SRussell King } else if (ret) { 2220256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2221256e43cbSRussell King break; 2222256e43cbSRussell King } 222374c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 222474c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 222574c551caSRussell King break; 222674c551caSRussell King } 2227d23751a0SRussell King sfp_sm_link_check_los(sfp); 2228d23751a0SRussell King 2229d23751a0SRussell King /* Reset the fault retry count */ 2230281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2231d23751a0SRussell King break; 2232d23751a0SRussell King 2233d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2234d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2235d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 223626c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2237d23751a0SRussell King } 223873970055SRussell King break; 223973970055SRussell King 224073970055SRussell King case SFP_S_WAIT_LOS: 224173970055SRussell King if (event == SFP_E_TX_FAULT) 224263ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2243710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 224473970055SRussell King sfp_sm_link_up(sfp); 224573970055SRussell King break; 224673970055SRussell King 224773970055SRussell King case SFP_S_LINK_UP: 224873970055SRussell King if (event == SFP_E_TX_FAULT) { 224973970055SRussell King sfp_sm_link_down(sfp); 225063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2251710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 225273970055SRussell King sfp_sm_link_down(sfp); 225373970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 225473970055SRussell King } 225573970055SRussell King break; 225673970055SRussell King 225773970055SRussell King case SFP_S_TX_FAULT: 225873970055SRussell King if (event == SFP_E_TIMEOUT) { 225973970055SRussell King sfp_module_tx_fault_reset(sfp); 226026c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 226173970055SRussell King } 226273970055SRussell King break; 226373970055SRussell King 226473970055SRussell King case SFP_S_REINIT: 226573970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 226663ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 226773970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 226873970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 226973970055SRussell King sfp_sm_link_check_los(sfp); 227073970055SRussell King } 227173970055SRussell King break; 227273970055SRussell King 227373970055SRussell King case SFP_S_TX_DISABLE: 227473970055SRussell King break; 227573970055SRussell King } 2276e85d81a1SRussell King } 2277e85d81a1SRussell King 2278e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2279e85d81a1SRussell King { 2280e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2281e85d81a1SRussell King 2282e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2283e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2284e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2285e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2286e85d81a1SRussell King event_to_str(event)); 2287e85d81a1SRussell King 2288e85d81a1SRussell King sfp_sm_device(sfp, event); 22896b0da5c9SRussell King sfp_sm_module(sfp, event); 2290e85d81a1SRussell King sfp_sm_main(sfp, event); 229173970055SRussell King 22924005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 22934005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 22944005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 22954005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 229673970055SRussell King 229773970055SRussell King mutex_unlock(&sfp->sm_mutex); 229873970055SRussell King } 229973970055SRussell King 2300b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2301b5bfc21aSRussell King { 23026b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2303b5bfc21aSRussell King } 2304b5bfc21aSRussell King 2305b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2306b5bfc21aSRussell King { 23076b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2308b5bfc21aSRussell King } 2309b5bfc21aSRussell King 231073970055SRussell King static void sfp_start(struct sfp *sfp) 231173970055SRussell King { 231273970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 231373970055SRussell King } 231473970055SRussell King 231573970055SRussell King static void sfp_stop(struct sfp *sfp) 231673970055SRussell King { 231773970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 231873970055SRussell King } 231973970055SRussell King 232073970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 232173970055SRussell King { 232273970055SRussell King /* locking... and check module is present */ 232373970055SRussell King 2324ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2325ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 232673970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 232773970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 232873970055SRussell King } else { 232973970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 233073970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 233173970055SRussell King } 233273970055SRussell King return 0; 233373970055SRussell King } 233473970055SRussell King 233573970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 233673970055SRussell King u8 *data) 233773970055SRussell King { 233873970055SRussell King unsigned int first, last, len; 233973970055SRussell King int ret; 234073970055SRussell King 234173970055SRussell King if (ee->len == 0) 234273970055SRussell King return -EINVAL; 234373970055SRussell King 234473970055SRussell King first = ee->offset; 234573970055SRussell King last = ee->offset + ee->len; 234673970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 234773970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 234873970055SRussell King len -= first; 234973970055SRussell King 23502794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 235173970055SRussell King if (ret < 0) 235273970055SRussell King return ret; 235373970055SRussell King 235473970055SRussell King first += len; 235573970055SRussell King data += len; 235673970055SRussell King } 23572794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 235873970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 235973970055SRussell King len -= first; 236073970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 236173970055SRussell King 23622794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 236373970055SRussell King if (ret < 0) 236473970055SRussell King return ret; 236573970055SRussell King } 236673970055SRussell King return 0; 236773970055SRussell King } 236873970055SRussell King 2369d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2370d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2371d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2372d740513fSAndrew Lunn { 2373d740513fSAndrew Lunn if (page->bank) { 2374d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2375d740513fSAndrew Lunn return -EOPNOTSUPP; 2376d740513fSAndrew Lunn } 2377d740513fSAndrew Lunn 2378d740513fSAndrew Lunn if (page->page) { 2379d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2380d740513fSAndrew Lunn return -EOPNOTSUPP; 2381d740513fSAndrew Lunn } 2382d740513fSAndrew Lunn 2383d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2384d740513fSAndrew Lunn page->i2c_address != 0x51) { 2385d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2386d740513fSAndrew Lunn return -EOPNOTSUPP; 2387d740513fSAndrew Lunn } 2388d740513fSAndrew Lunn 2389d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2390d740513fSAndrew Lunn page->data, page->length); 2391d740513fSAndrew Lunn }; 2392d740513fSAndrew Lunn 239373970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2394b5bfc21aSRussell King .attach = sfp_attach, 2395b5bfc21aSRussell King .detach = sfp_detach, 239673970055SRussell King .start = sfp_start, 239773970055SRussell King .stop = sfp_stop, 239873970055SRussell King .module_info = sfp_module_info, 239973970055SRussell King .module_eeprom = sfp_module_eeprom, 2400d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 240173970055SRussell King }; 240273970055SRussell King 240373970055SRussell King static void sfp_timeout(struct work_struct *work) 240473970055SRussell King { 240573970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 240673970055SRussell King 240773970055SRussell King rtnl_lock(); 240873970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 240973970055SRussell King rtnl_unlock(); 241073970055SRussell King } 241173970055SRussell King 241273970055SRussell King static void sfp_check_state(struct sfp *sfp) 241373970055SRussell King { 241473970055SRussell King unsigned int state, i, changed; 241573970055SRussell King 24162158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 241773970055SRussell King state = sfp_get_state(sfp); 241873970055SRussell King changed = state ^ sfp->state; 24192069624dSMatthew Hagan if (sfp->tx_fault_ignore) 24202069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 24212069624dSMatthew Hagan else 242273970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 242373970055SRussell King 242473970055SRussell King for (i = 0; i < GPIO_MAX; i++) 242573970055SRussell King if (changed & BIT(i)) 242673970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 242773970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 242873970055SRussell King 242973970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 243073970055SRussell King sfp->state = state; 243173970055SRussell King 243273970055SRussell King rtnl_lock(); 243373970055SRussell King if (changed & SFP_F_PRESENT) 243473970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 243573970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 243673970055SRussell King 243773970055SRussell King if (changed & SFP_F_TX_FAULT) 243873970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 243973970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 244073970055SRussell King 244173970055SRussell King if (changed & SFP_F_LOS) 244273970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 244373970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 244473970055SRussell King rtnl_unlock(); 24452158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 244673970055SRussell King } 244773970055SRussell King 244873970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 244973970055SRussell King { 245073970055SRussell King struct sfp *sfp = data; 245173970055SRussell King 245273970055SRussell King sfp_check_state(sfp); 245373970055SRussell King 245473970055SRussell King return IRQ_HANDLED; 245573970055SRussell King } 245673970055SRussell King 245773970055SRussell King static void sfp_poll(struct work_struct *work) 245873970055SRussell King { 245973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 246073970055SRussell King 246173970055SRussell King sfp_check_state(sfp); 2462f3c9a666SRussell King 2463f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2464f3c9a666SRussell King sfp->need_poll) 246573970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 246673970055SRussell King } 246773970055SRussell King 246873970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 246973970055SRussell King { 247073970055SRussell King struct sfp *sfp; 247173970055SRussell King 247273970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 247373970055SRussell King if (!sfp) 247473970055SRussell King return ERR_PTR(-ENOMEM); 247573970055SRussell King 247673970055SRussell King sfp->dev = dev; 247773970055SRussell King 247873970055SRussell King mutex_init(&sfp->sm_mutex); 24792158e856SRobert Hancock mutex_init(&sfp->st_mutex); 248073970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 248173970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 248273970055SRussell King 2483139d3a21SRussell King sfp_hwmon_init(sfp); 2484139d3a21SRussell King 248573970055SRussell King return sfp; 248673970055SRussell King } 248773970055SRussell King 248873970055SRussell King static void sfp_cleanup(void *data) 248973970055SRussell King { 249073970055SRussell King struct sfp *sfp = data; 249173970055SRussell King 2492139d3a21SRussell King sfp_hwmon_exit(sfp); 2493139d3a21SRussell King 249473970055SRussell King cancel_delayed_work_sync(&sfp->poll); 249573970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 249673970055SRussell King if (sfp->i2c_mii) { 249773970055SRussell King mdiobus_unregister(sfp->i2c_mii); 249873970055SRussell King mdiobus_free(sfp->i2c_mii); 249973970055SRussell King } 250073970055SRussell King if (sfp->i2c) 250173970055SRussell King i2c_put_adapter(sfp->i2c); 250273970055SRussell King kfree(sfp); 250373970055SRussell King } 250473970055SRussell King 250573970055SRussell King static int sfp_probe(struct platform_device *pdev) 250673970055SRussell King { 2507259c8618SRussell King const struct sff_data *sff; 25087ce236faSRuslan Babayev struct i2c_adapter *i2c; 25095411ca71SChris Healy char *sfp_irq_name; 251073970055SRussell King struct sfp *sfp; 2511257c2559SRobert Hancock int err, i; 251273970055SRussell King 251373970055SRussell King sfp = sfp_alloc(&pdev->dev); 251473970055SRussell King if (IS_ERR(sfp)) 251573970055SRussell King return PTR_ERR(sfp); 251673970055SRussell King 251773970055SRussell King platform_set_drvdata(pdev, sfp); 251873970055SRussell King 2519*0a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 252073970055SRussell King if (err < 0) 252173970055SRussell King return err; 252273970055SRussell King 2523259c8618SRussell King sff = sfp->type = &sfp_data; 2524259c8618SRussell King 252573970055SRussell King if (pdev->dev.of_node) { 252673970055SRussell King struct device_node *node = pdev->dev.of_node; 2527259c8618SRussell King const struct of_device_id *id; 252873970055SRussell King struct device_node *np; 252973970055SRussell King 2530259c8618SRussell King id = of_match_node(sfp_of_match, node); 2531259c8618SRussell King if (WARN_ON(!id)) 2532259c8618SRussell King return -EINVAL; 2533259c8618SRussell King 2534259c8618SRussell King sff = sfp->type = id->data; 2535259c8618SRussell King 253673970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 253766ede1f9SAntoine Tenart if (!np) { 253866ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 253966ede1f9SAntoine Tenart return -ENODEV; 254066ede1f9SAntoine Tenart } 254173970055SRussell King 254273970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 254373970055SRussell King of_node_put(np); 25447ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 25457ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 25467ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 25477ce236faSRuslan Babayev struct fwnode_reference_args args; 25487ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 25497ce236faSRuslan Babayev int ret; 25507ce236faSRuslan Babayev 25517ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 25521086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 25537ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 25547ce236faSRuslan Babayev return -ENODEV; 25557ce236faSRuslan Babayev } 25567ce236faSRuslan Babayev 25577ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 25587ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 25597ce236faSRuslan Babayev } else { 25607ce236faSRuslan Babayev return -EINVAL; 25617ce236faSRuslan Babayev } 25627ce236faSRuslan Babayev 256373970055SRussell King if (!i2c) 256473970055SRussell King return -EPROBE_DEFER; 256573970055SRussell King 256673970055SRussell King err = sfp_i2c_configure(sfp, i2c); 256773970055SRussell King if (err < 0) { 256873970055SRussell King i2c_put_adapter(i2c); 256973970055SRussell King return err; 257073970055SRussell King } 257173970055SRussell King 2572259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2573259c8618SRussell King if (sff->gpios & BIT(i)) { 257473970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 257573970055SRussell King gpio_of_names[i], gpio_flags[i]); 257673970055SRussell King if (IS_ERR(sfp->gpio[i])) 257773970055SRussell King return PTR_ERR(sfp->gpio[i]); 257873970055SRussell King } 257973970055SRussell King 258073970055SRussell King sfp->get_state = sfp_gpio_get_state; 258173970055SRussell King sfp->set_state = sfp_gpio_set_state; 2582259c8618SRussell King 2583259c8618SRussell King /* Modules that have no detect signal are always present */ 2584259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2585259c8618SRussell King sfp->get_state = sff_gpio_get_state; 258673970055SRussell King 25873bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 25883bb35261SJon Nettleton &sfp->max_power_mW); 25893bb35261SJon Nettleton if (!sfp->max_power_mW) 25903bb35261SJon Nettleton sfp->max_power_mW = 1000; 25913bb35261SJon Nettleton 25923bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 25933bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 25943bb35261SJon Nettleton 259573970055SRussell King /* Get the initial state, and always signal TX disable, 259673970055SRussell King * since the network interface will not be up. 259773970055SRussell King */ 259873970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 259973970055SRussell King 260073970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 260173970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 260273970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 260373970055SRussell King sfp_set_state(sfp, sfp->state); 260473970055SRussell King sfp_module_tx_disable(sfp); 260573f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 260673f5e847SRussell King rtnl_lock(); 260773f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 260873f5e847SRussell King rtnl_unlock(); 260973f5e847SRussell King } 261073970055SRussell King 261173970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 261273970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 261373970055SRussell King continue; 261473970055SRussell King 2615257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 261696216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 261796216181SYueHaibing sfp->gpio_irq[i] = 0; 2618f3c9a666SRussell King sfp->need_poll = true; 261973970055SRussell King continue; 262073970055SRussell King } 262173970055SRussell King 26225411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 26235411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 26245411ca71SChris Healy gpio_of_names[i]); 26255411ca71SChris Healy 26268cb601f1SChris Healy if (!sfp_irq_name) 26278cb601f1SChris Healy return -ENOMEM; 26288cb601f1SChris Healy 2629257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2630257c2559SRobert Hancock NULL, sfp_irq, 263173970055SRussell King IRQF_ONESHOT | 263273970055SRussell King IRQF_TRIGGER_RISING | 263373970055SRussell King IRQF_TRIGGER_FALLING, 26345411ca71SChris Healy sfp_irq_name, sfp); 2635257c2559SRobert Hancock if (err) { 2636257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2637f3c9a666SRussell King sfp->need_poll = true; 263873970055SRussell King } 2639257c2559SRobert Hancock } 264073970055SRussell King 2641f3c9a666SRussell King if (sfp->need_poll) 264273970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 264373970055SRussell King 2644a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2645a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2646a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2647a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2648a1f5d1f0SAntoine Tenart */ 2649a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2650a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2651a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2652a1f5d1f0SAntoine Tenart 2653b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2654b5bfc21aSRussell King if (!sfp->sfp_bus) 2655b5bfc21aSRussell King return -ENOMEM; 2656b5bfc21aSRussell King 26579cc8976cSRussell King sfp_debugfs_init(sfp); 26589cc8976cSRussell King 265973970055SRussell King return 0; 266073970055SRussell King } 266173970055SRussell King 266273970055SRussell King static int sfp_remove(struct platform_device *pdev) 266373970055SRussell King { 266473970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 266573970055SRussell King 26669cc8976cSRussell King sfp_debugfs_exit(sfp); 266773970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 266873970055SRussell King 26690cb96b57SRussell King rtnl_lock(); 26700cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 26710cb96b57SRussell King rtnl_unlock(); 26720cb96b57SRussell King 267373970055SRussell King return 0; 267473970055SRussell King } 267573970055SRussell King 2676257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2677257c2559SRobert Hancock { 2678257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2679257c2559SRobert Hancock int i; 2680257c2559SRobert Hancock 2681257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2682257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2683257c2559SRobert Hancock continue; 2684257c2559SRobert Hancock 2685257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2686257c2559SRobert Hancock } 2687257c2559SRobert Hancock 2688257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2689257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2690257c2559SRobert Hancock } 2691257c2559SRobert Hancock 269273970055SRussell King static struct platform_driver sfp_driver = { 269373970055SRussell King .probe = sfp_probe, 269473970055SRussell King .remove = sfp_remove, 2695257c2559SRobert Hancock .shutdown = sfp_shutdown, 269673970055SRussell King .driver = { 269773970055SRussell King .name = "sfp", 269873970055SRussell King .of_match_table = sfp_of_match, 269973970055SRussell King }, 270073970055SRussell King }; 270173970055SRussell King 270273970055SRussell King static int sfp_init(void) 270373970055SRussell King { 270473970055SRussell King poll_jiffies = msecs_to_jiffies(100); 270573970055SRussell King 270673970055SRussell King return platform_driver_register(&sfp_driver); 270773970055SRussell King } 270873970055SRussell King module_init(sfp_init); 270973970055SRussell King 271073970055SRussell King static void sfp_exit(void) 271173970055SRussell King { 271273970055SRussell King platform_driver_unregister(&sfp_driver); 271373970055SRussell King } 271473970055SRussell King module_exit(sfp_exit); 271573970055SRussell King 271673970055SRussell King MODULE_ALIAS("platform:sfp"); 271773970055SRussell King MODULE_AUTHOR("Russell King"); 271873970055SRussell King MODULE_LICENSE("GPL v2"); 2719