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; 253ed32abb1SRussell King 2541323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2551323061aSAndrew Lunn struct sfp_diag diag; 256139d3a21SRussell King struct delayed_work hwmon_probe; 257139d3a21SRussell King unsigned int hwmon_tries; 2581323061aSAndrew Lunn struct device *hwmon_dev; 2591323061aSAndrew Lunn char *hwmon_name; 2601323061aSAndrew Lunn #endif 2611323061aSAndrew Lunn 2629cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2639cc8976cSRussell King struct dentry *debugfs_dir; 2649cc8976cSRussell King #endif 26573970055SRussell King }; 26673970055SRussell King 267259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 268259c8618SRussell King { 2690fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 270259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 271259c8618SRussell King } 272259c8618SRussell King 273259c8618SRussell King static const struct sff_data sff_data = { 274259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 275259c8618SRussell King .module_supported = sff_module_supported, 276259c8618SRussell King }; 277259c8618SRussell King 278259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 279259c8618SRussell King { 280f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 281f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 282f0b4f847SPali Rohár return true; 283f0b4f847SPali Rohár 284f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 285f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 286f0b4f847SPali Rohár * as supported based on vendor name and pn match. 287f0b4f847SPali Rohár */ 288f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 289f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 290f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 291f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 292f0b4f847SPali Rohár return true; 293f0b4f847SPali Rohár 294f0b4f847SPali Rohár return false; 295259c8618SRussell King } 296259c8618SRussell King 297259c8618SRussell King static const struct sff_data sfp_data = { 298259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 299259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 300259c8618SRussell King .module_supported = sfp_module_supported, 301259c8618SRussell King }; 302259c8618SRussell King 303259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 304259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 305259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 306259c8618SRussell King { }, 307259c8618SRussell King }; 308259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 309259c8618SRussell King 31073970055SRussell King static unsigned long poll_jiffies; 31173970055SRussell King 31273970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 31373970055SRussell King { 31473970055SRussell King unsigned int i, state, v; 31573970055SRussell King 31673970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 31773970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 31873970055SRussell King continue; 31973970055SRussell King 32073970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 32173970055SRussell King if (v) 32273970055SRussell King state |= BIT(i); 32373970055SRussell King } 32473970055SRussell King 32573970055SRussell King return state; 32673970055SRussell King } 32773970055SRussell King 328259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 329259c8618SRussell King { 330259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 331259c8618SRussell King } 332259c8618SRussell King 33373970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 33473970055SRussell King { 33573970055SRussell King if (state & SFP_F_PRESENT) { 33673970055SRussell King /* If the module is present, drive the signals */ 33773970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 33873970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 33973970055SRussell King state & SFP_F_TX_DISABLE); 34073970055SRussell King if (state & SFP_F_RATE_SELECT) 34173970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 34273970055SRussell King state & SFP_F_RATE_SELECT); 34373970055SRussell King } else { 34473970055SRussell King /* Otherwise, let them float to the pull-ups */ 34573970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 34673970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 34773970055SRussell King if (state & SFP_F_RATE_SELECT) 34873970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 34973970055SRussell King } 35073970055SRussell King } 35173970055SRussell King 3523bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3533bb35261SJon Nettleton size_t len) 35473970055SRussell King { 35573970055SRussell King struct i2c_msg msgs[2]; 356426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 357426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 35828e74a7cSRussell King size_t this_len; 35973970055SRussell King int ret; 36073970055SRussell King 36173970055SRussell King msgs[0].addr = bus_addr; 36273970055SRussell King msgs[0].flags = 0; 36373970055SRussell King msgs[0].len = 1; 36473970055SRussell King msgs[0].buf = &dev_addr; 36573970055SRussell King msgs[1].addr = bus_addr; 36673970055SRussell King msgs[1].flags = I2C_M_RD; 36773970055SRussell King msgs[1].len = len; 36873970055SRussell King msgs[1].buf = buf; 36973970055SRussell King 37028e74a7cSRussell King while (len) { 37128e74a7cSRussell King this_len = len; 3720d035bedSRussell King if (this_len > block_size) 3730d035bedSRussell King this_len = block_size; 37428e74a7cSRussell King 37528e74a7cSRussell King msgs[1].len = this_len; 37628e74a7cSRussell King 3773bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 37873970055SRussell King if (ret < 0) 37973970055SRussell King return ret; 38073970055SRussell King 38128e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 38228e74a7cSRussell King break; 38328e74a7cSRussell King 38428e74a7cSRussell King msgs[1].buf += this_len; 38528e74a7cSRussell King dev_addr += this_len; 38628e74a7cSRussell King len -= this_len; 38728e74a7cSRussell King } 38828e74a7cSRussell King 38928e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 39073970055SRussell King } 39173970055SRussell King 3923bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 39373970055SRussell King size_t len) 39473970055SRussell King { 3953bb35261SJon Nettleton struct i2c_msg msgs[1]; 3963bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3973bb35261SJon Nettleton int ret; 3983bb35261SJon Nettleton 3993bb35261SJon Nettleton msgs[0].addr = bus_addr; 4003bb35261SJon Nettleton msgs[0].flags = 0; 4013bb35261SJon Nettleton msgs[0].len = 1 + len; 4023bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 4033bb35261SJon Nettleton if (!msgs[0].buf) 4043bb35261SJon Nettleton return -ENOMEM; 4053bb35261SJon Nettleton 4063bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 4073bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 4083bb35261SJon Nettleton 4093bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 4103bb35261SJon Nettleton 4113bb35261SJon Nettleton kfree(msgs[0].buf); 4123bb35261SJon Nettleton 4133bb35261SJon Nettleton if (ret < 0) 4143bb35261SJon Nettleton return ret; 4153bb35261SJon Nettleton 4163bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 41773970055SRussell King } 41873970055SRussell King 41973970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 42073970055SRussell King { 42173970055SRussell King struct mii_bus *i2c_mii; 42273970055SRussell King int ret; 42373970055SRussell King 42473970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 42573970055SRussell King return -EINVAL; 42673970055SRussell King 42773970055SRussell King sfp->i2c = i2c; 42873970055SRussell King sfp->read = sfp_i2c_read; 4293bb35261SJon Nettleton sfp->write = sfp_i2c_write; 43073970055SRussell King 43173970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 43273970055SRussell King if (IS_ERR(i2c_mii)) 43373970055SRussell King return PTR_ERR(i2c_mii); 43473970055SRussell King 43573970055SRussell King i2c_mii->name = "SFP I2C Bus"; 43673970055SRussell King i2c_mii->phy_mask = ~0; 43773970055SRussell King 43873970055SRussell King ret = mdiobus_register(i2c_mii); 43973970055SRussell King if (ret < 0) { 44073970055SRussell King mdiobus_free(i2c_mii); 44173970055SRussell King return ret; 44273970055SRussell King } 44373970055SRussell King 44473970055SRussell King sfp->i2c_mii = i2c_mii; 44573970055SRussell King 44673970055SRussell King return 0; 44773970055SRussell King } 44873970055SRussell King 44973970055SRussell King /* Interface */ 45073970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 45173970055SRussell King { 45273970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 45373970055SRussell King } 45473970055SRussell King 4553bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4563bb35261SJon Nettleton { 4573bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4583bb35261SJon Nettleton } 4593bb35261SJon Nettleton 460f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 461f3c9a666SRussell King { 462f3c9a666SRussell King unsigned int state = 0; 463f3c9a666SRussell King u8 status; 4640dea4d03SRussell King int ret; 465f3c9a666SRussell King 4660dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 4670dea4d03SRussell King if (ret == sizeof(status)) { 468f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 469f3c9a666SRussell King state |= SFP_F_LOS; 470f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 471f3c9a666SRussell King state |= SFP_F_TX_FAULT; 4720dea4d03SRussell King } else { 4730dea4d03SRussell King dev_err_ratelimited(sfp->dev, 474*9ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 475*9ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 4760dea4d03SRussell King /* Preserve the current state */ 4770dea4d03SRussell King state = sfp->state; 478f3c9a666SRussell King } 479f3c9a666SRussell King 480f3c9a666SRussell King return state & sfp->state_soft_mask; 481f3c9a666SRussell King } 482f3c9a666SRussell King 483f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 484f3c9a666SRussell King { 485f3c9a666SRussell King u8 status; 486f3c9a666SRussell King 487f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 488f3c9a666SRussell King sizeof(status)) { 489f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 490f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 491f3c9a666SRussell King else 492f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 493f3c9a666SRussell King 494f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 495f3c9a666SRussell King } 496f3c9a666SRussell King } 497f3c9a666SRussell King 498f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 499f3c9a666SRussell King { 500f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 501f3c9a666SRussell King 502f3c9a666SRussell King sfp->state_soft_mask = 0; 503f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && 504f3c9a666SRussell King !sfp->gpio[GPIO_TX_DISABLE]) 505f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_DISABLE; 506f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && 507f3c9a666SRussell King !sfp->gpio[GPIO_TX_FAULT]) 508f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_FAULT; 509f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && 510f3c9a666SRussell King !sfp->gpio[GPIO_LOS]) 511f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_LOS; 512f3c9a666SRussell King 513f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 514f3c9a666SRussell King !sfp->need_poll) 515f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 516f3c9a666SRussell King } 517f3c9a666SRussell King 518f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 519f3c9a666SRussell King { 520f3c9a666SRussell King sfp->state_soft_mask = 0; 521f3c9a666SRussell King } 522f3c9a666SRussell King 523f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 524f3c9a666SRussell King { 525f3c9a666SRussell King unsigned int state = sfp->get_state(sfp); 526f3c9a666SRussell King 527f3c9a666SRussell King if (state & SFP_F_PRESENT && 528f3c9a666SRussell King sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) 529f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 530f3c9a666SRussell King 531f3c9a666SRussell King return state; 532f3c9a666SRussell King } 533f3c9a666SRussell King 534f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 535f3c9a666SRussell King { 536f3c9a666SRussell King sfp->set_state(sfp, state); 537f3c9a666SRussell King 538f3c9a666SRussell King if (state & SFP_F_PRESENT && 539f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 540f3c9a666SRussell King sfp_soft_set_state(sfp, state); 541f3c9a666SRussell King } 542f3c9a666SRussell King 54373970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 54473970055SRussell King { 54573970055SRussell King u8 *p, check; 54673970055SRussell King 54773970055SRussell King for (p = buf, check = 0; len; p++, len--) 54873970055SRussell King check += *p; 54973970055SRussell King 55073970055SRussell King return check; 55173970055SRussell King } 55273970055SRussell King 5531323061aSAndrew Lunn /* hwmon */ 5541323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 5551323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5561323061aSAndrew Lunn enum hwmon_sensor_types type, 5571323061aSAndrew Lunn u32 attr, int channel) 5581323061aSAndrew Lunn { 5591323061aSAndrew Lunn const struct sfp *sfp = data; 5601323061aSAndrew Lunn 5611323061aSAndrew Lunn switch (type) { 5621323061aSAndrew Lunn case hwmon_temp: 5631323061aSAndrew Lunn switch (attr) { 5641323061aSAndrew Lunn case hwmon_temp_min_alarm: 5651323061aSAndrew Lunn case hwmon_temp_max_alarm: 5661323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5671323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5681323061aSAndrew Lunn case hwmon_temp_min: 5691323061aSAndrew Lunn case hwmon_temp_max: 5701323061aSAndrew Lunn case hwmon_temp_lcrit: 5711323061aSAndrew Lunn case hwmon_temp_crit: 572a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 573a33710bdSAndrew Lunn return 0; 574df561f66SGustavo A. R. Silva fallthrough; 575a33710bdSAndrew Lunn case hwmon_temp_input: 576c1236979SAndrew Lunn case hwmon_temp_label: 5771323061aSAndrew Lunn return 0444; 5781323061aSAndrew Lunn default: 5791323061aSAndrew Lunn return 0; 5801323061aSAndrew Lunn } 5811323061aSAndrew Lunn case hwmon_in: 5821323061aSAndrew Lunn switch (attr) { 5831323061aSAndrew Lunn case hwmon_in_min_alarm: 5841323061aSAndrew Lunn case hwmon_in_max_alarm: 5851323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5861323061aSAndrew Lunn case hwmon_in_crit_alarm: 5871323061aSAndrew Lunn case hwmon_in_min: 5881323061aSAndrew Lunn case hwmon_in_max: 5891323061aSAndrew Lunn case hwmon_in_lcrit: 5901323061aSAndrew Lunn case hwmon_in_crit: 591a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 592a33710bdSAndrew Lunn return 0; 593df561f66SGustavo A. R. Silva fallthrough; 594a33710bdSAndrew Lunn case hwmon_in_input: 595c1236979SAndrew Lunn case hwmon_in_label: 5961323061aSAndrew Lunn return 0444; 5971323061aSAndrew Lunn default: 5981323061aSAndrew Lunn return 0; 5991323061aSAndrew Lunn } 6001323061aSAndrew Lunn case hwmon_curr: 6011323061aSAndrew Lunn switch (attr) { 6021323061aSAndrew Lunn case hwmon_curr_min_alarm: 6031323061aSAndrew Lunn case hwmon_curr_max_alarm: 6041323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 6051323061aSAndrew Lunn case hwmon_curr_crit_alarm: 6061323061aSAndrew Lunn case hwmon_curr_min: 6071323061aSAndrew Lunn case hwmon_curr_max: 6081323061aSAndrew Lunn case hwmon_curr_lcrit: 6091323061aSAndrew Lunn case hwmon_curr_crit: 610a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 611a33710bdSAndrew Lunn return 0; 612df561f66SGustavo A. R. Silva fallthrough; 613a33710bdSAndrew Lunn case hwmon_curr_input: 614c1236979SAndrew Lunn case hwmon_curr_label: 6151323061aSAndrew Lunn return 0444; 6161323061aSAndrew Lunn default: 6171323061aSAndrew Lunn return 0; 6181323061aSAndrew Lunn } 6191323061aSAndrew Lunn case hwmon_power: 6201323061aSAndrew Lunn /* External calibration of receive power requires 6211323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 6221323061aSAndrew Lunn * is not easy, so just skip it. If the module does 6231323061aSAndrew Lunn * not require external calibration, we can however 6241323061aSAndrew Lunn * show receiver power, since FP is then not needed. 6251323061aSAndrew Lunn */ 6261323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 6271323061aSAndrew Lunn channel == 1) 6281323061aSAndrew Lunn return 0; 6291323061aSAndrew Lunn switch (attr) { 6301323061aSAndrew Lunn case hwmon_power_min_alarm: 6311323061aSAndrew Lunn case hwmon_power_max_alarm: 6321323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 6331323061aSAndrew Lunn case hwmon_power_crit_alarm: 6341323061aSAndrew Lunn case hwmon_power_min: 6351323061aSAndrew Lunn case hwmon_power_max: 6361323061aSAndrew Lunn case hwmon_power_lcrit: 6371323061aSAndrew Lunn case hwmon_power_crit: 638a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 639a33710bdSAndrew Lunn return 0; 640df561f66SGustavo A. R. Silva fallthrough; 641a33710bdSAndrew Lunn case hwmon_power_input: 642c1236979SAndrew Lunn case hwmon_power_label: 6431323061aSAndrew Lunn return 0444; 6441323061aSAndrew Lunn default: 6451323061aSAndrew Lunn return 0; 6461323061aSAndrew Lunn } 6471323061aSAndrew Lunn default: 6481323061aSAndrew Lunn return 0; 6491323061aSAndrew Lunn } 6501323061aSAndrew Lunn } 6511323061aSAndrew Lunn 6521323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 6531323061aSAndrew Lunn { 6541323061aSAndrew Lunn __be16 val; 6551323061aSAndrew Lunn int err; 6561323061aSAndrew Lunn 6571323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6581323061aSAndrew Lunn if (err < 0) 6591323061aSAndrew Lunn return err; 6601323061aSAndrew Lunn 6611323061aSAndrew Lunn *value = be16_to_cpu(val); 6621323061aSAndrew Lunn 6631323061aSAndrew Lunn return 0; 6641323061aSAndrew Lunn } 6651323061aSAndrew Lunn 6661323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6671323061aSAndrew Lunn { 6680cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6691323061aSAndrew Lunn } 6701323061aSAndrew Lunn 6711323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6721323061aSAndrew Lunn long *value) 6731323061aSAndrew Lunn { 6741323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6751323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6761323061aSAndrew Lunn } 6771323061aSAndrew Lunn 6781323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6791323061aSAndrew Lunn { 6801323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6811323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6821323061aSAndrew Lunn 6831323061aSAndrew Lunn if (*value >= 0x8000) 6841323061aSAndrew Lunn *value -= 0x10000; 6851323061aSAndrew Lunn 6861323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6871323061aSAndrew Lunn } 6881323061aSAndrew Lunn 6891323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6901323061aSAndrew Lunn { 6911323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6921323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6931323061aSAndrew Lunn 6941323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6951323061aSAndrew Lunn } 6961323061aSAndrew Lunn 6971323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 6981323061aSAndrew Lunn { 6991323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 7001323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 7011323061aSAndrew Lunn 7021323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 7031323061aSAndrew Lunn } 7041323061aSAndrew Lunn 7051323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 7061323061aSAndrew Lunn { 7071323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 7081323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 7091323061aSAndrew Lunn 7101323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 7111323061aSAndrew Lunn } 7121323061aSAndrew Lunn 7131323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 7141323061aSAndrew Lunn { 7151323061aSAndrew Lunn int err; 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7181323061aSAndrew Lunn if (err < 0) 7191323061aSAndrew Lunn return err; 7201323061aSAndrew Lunn 7211323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7221323061aSAndrew Lunn 7231323061aSAndrew Lunn return 0; 7241323061aSAndrew Lunn } 7251323061aSAndrew Lunn 7261323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 7271323061aSAndrew Lunn { 7281323061aSAndrew Lunn int err; 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7311323061aSAndrew Lunn if (err < 0) 7321323061aSAndrew Lunn return err; 7331323061aSAndrew Lunn 7341323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7351323061aSAndrew Lunn 7361323061aSAndrew Lunn return 0; 7371323061aSAndrew Lunn } 7381323061aSAndrew Lunn 7391323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 7401323061aSAndrew Lunn { 7411323061aSAndrew Lunn int err; 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7441323061aSAndrew Lunn if (err < 0) 7451323061aSAndrew Lunn return err; 7461323061aSAndrew Lunn 7471323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7481323061aSAndrew Lunn 7491323061aSAndrew Lunn return 0; 7501323061aSAndrew Lunn } 7511323061aSAndrew Lunn 7521323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 7531323061aSAndrew Lunn { 7541323061aSAndrew Lunn int err; 7551323061aSAndrew Lunn 7561323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7571323061aSAndrew Lunn if (err < 0) 7581323061aSAndrew Lunn return err; 7591323061aSAndrew Lunn 7601323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7611323061aSAndrew Lunn 7621323061aSAndrew Lunn return 0; 7631323061aSAndrew Lunn } 7641323061aSAndrew Lunn 7651323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7661323061aSAndrew Lunn { 7671323061aSAndrew Lunn int err; 7681323061aSAndrew Lunn 7691323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7701323061aSAndrew Lunn if (err < 0) 7711323061aSAndrew Lunn return err; 7721323061aSAndrew Lunn 7731323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7741323061aSAndrew Lunn 7751323061aSAndrew Lunn return 0; 7761323061aSAndrew Lunn } 7771323061aSAndrew Lunn 7781323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7791323061aSAndrew Lunn { 7801323061aSAndrew Lunn u8 status; 7811323061aSAndrew Lunn int err; 7821323061aSAndrew Lunn 7831323061aSAndrew Lunn switch (attr) { 7841323061aSAndrew Lunn case hwmon_temp_input: 7851323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7861323061aSAndrew Lunn 7871323061aSAndrew Lunn case hwmon_temp_lcrit: 7881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7891323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7901323061aSAndrew Lunn return 0; 7911323061aSAndrew Lunn 7921323061aSAndrew Lunn case hwmon_temp_min: 7931323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7941323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7951323061aSAndrew Lunn return 0; 7961323061aSAndrew Lunn case hwmon_temp_max: 7971323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 7981323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7991323061aSAndrew Lunn return 0; 8001323061aSAndrew Lunn 8011323061aSAndrew Lunn case hwmon_temp_crit: 8021323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 8031323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8041323061aSAndrew Lunn return 0; 8051323061aSAndrew Lunn 8061323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 8071323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8081323061aSAndrew Lunn if (err < 0) 8091323061aSAndrew Lunn return err; 8101323061aSAndrew Lunn 8111323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 8121323061aSAndrew Lunn return 0; 8131323061aSAndrew Lunn 8141323061aSAndrew Lunn case hwmon_temp_min_alarm: 8151323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8161323061aSAndrew Lunn if (err < 0) 8171323061aSAndrew Lunn return err; 8181323061aSAndrew Lunn 8191323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 8201323061aSAndrew Lunn return 0; 8211323061aSAndrew Lunn 8221323061aSAndrew Lunn case hwmon_temp_max_alarm: 8231323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8241323061aSAndrew Lunn if (err < 0) 8251323061aSAndrew Lunn return err; 8261323061aSAndrew Lunn 8271323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 8281323061aSAndrew Lunn return 0; 8291323061aSAndrew Lunn 8301323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8311323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8321323061aSAndrew Lunn if (err < 0) 8331323061aSAndrew Lunn return err; 8341323061aSAndrew Lunn 8351323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 8361323061aSAndrew Lunn return 0; 8371323061aSAndrew Lunn default: 8381323061aSAndrew Lunn return -EOPNOTSUPP; 8391323061aSAndrew Lunn } 8401323061aSAndrew Lunn 8411323061aSAndrew Lunn return -EOPNOTSUPP; 8421323061aSAndrew Lunn } 8431323061aSAndrew Lunn 8441323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 8451323061aSAndrew Lunn { 8461323061aSAndrew Lunn u8 status; 8471323061aSAndrew Lunn int err; 8481323061aSAndrew Lunn 8491323061aSAndrew Lunn switch (attr) { 8501323061aSAndrew Lunn case hwmon_in_input: 8511323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 8521323061aSAndrew Lunn 8531323061aSAndrew Lunn case hwmon_in_lcrit: 8541323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 8551323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8561323061aSAndrew Lunn return 0; 8571323061aSAndrew Lunn 8581323061aSAndrew Lunn case hwmon_in_min: 8591323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8601323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8611323061aSAndrew Lunn return 0; 8621323061aSAndrew Lunn 8631323061aSAndrew Lunn case hwmon_in_max: 8641323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8651323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8661323061aSAndrew Lunn return 0; 8671323061aSAndrew Lunn 8681323061aSAndrew Lunn case hwmon_in_crit: 8691323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8701323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8711323061aSAndrew Lunn return 0; 8721323061aSAndrew Lunn 8731323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8741323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8751323061aSAndrew Lunn if (err < 0) 8761323061aSAndrew Lunn return err; 8771323061aSAndrew Lunn 8781323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8791323061aSAndrew Lunn return 0; 8801323061aSAndrew Lunn 8811323061aSAndrew Lunn case hwmon_in_min_alarm: 8821323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8831323061aSAndrew Lunn if (err < 0) 8841323061aSAndrew Lunn return err; 8851323061aSAndrew Lunn 8861323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 8871323061aSAndrew Lunn return 0; 8881323061aSAndrew Lunn 8891323061aSAndrew Lunn case hwmon_in_max_alarm: 8901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8911323061aSAndrew Lunn if (err < 0) 8921323061aSAndrew Lunn return err; 8931323061aSAndrew Lunn 8941323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8951323061aSAndrew Lunn return 0; 8961323061aSAndrew Lunn 8971323061aSAndrew Lunn case hwmon_in_crit_alarm: 8981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8991323061aSAndrew Lunn if (err < 0) 9001323061aSAndrew Lunn return err; 9011323061aSAndrew Lunn 9021323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 9031323061aSAndrew Lunn return 0; 9041323061aSAndrew Lunn default: 9051323061aSAndrew Lunn return -EOPNOTSUPP; 9061323061aSAndrew Lunn } 9071323061aSAndrew Lunn 9081323061aSAndrew Lunn return -EOPNOTSUPP; 9091323061aSAndrew Lunn } 9101323061aSAndrew Lunn 9111323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 9121323061aSAndrew Lunn { 9131323061aSAndrew Lunn u8 status; 9141323061aSAndrew Lunn int err; 9151323061aSAndrew Lunn 9161323061aSAndrew Lunn switch (attr) { 9171323061aSAndrew Lunn case hwmon_curr_input: 9181323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 9191323061aSAndrew Lunn 9201323061aSAndrew Lunn case hwmon_curr_lcrit: 9211323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 9221323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9231323061aSAndrew Lunn return 0; 9241323061aSAndrew Lunn 9251323061aSAndrew Lunn case hwmon_curr_min: 9261323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 9271323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9281323061aSAndrew Lunn return 0; 9291323061aSAndrew Lunn 9301323061aSAndrew Lunn case hwmon_curr_max: 9311323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 9321323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9331323061aSAndrew Lunn return 0; 9341323061aSAndrew Lunn 9351323061aSAndrew Lunn case hwmon_curr_crit: 9361323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 9371323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9381323061aSAndrew Lunn return 0; 9391323061aSAndrew Lunn 9401323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9411323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9421323061aSAndrew Lunn if (err < 0) 9431323061aSAndrew Lunn return err; 9441323061aSAndrew Lunn 9451323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 9461323061aSAndrew Lunn return 0; 9471323061aSAndrew Lunn 9481323061aSAndrew Lunn case hwmon_curr_min_alarm: 9491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9501323061aSAndrew Lunn if (err < 0) 9511323061aSAndrew Lunn return err; 9521323061aSAndrew Lunn 9531323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 9541323061aSAndrew Lunn return 0; 9551323061aSAndrew Lunn 9561323061aSAndrew Lunn case hwmon_curr_max_alarm: 9571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9581323061aSAndrew Lunn if (err < 0) 9591323061aSAndrew Lunn return err; 9601323061aSAndrew Lunn 9611323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9621323061aSAndrew Lunn return 0; 9631323061aSAndrew Lunn 9641323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9661323061aSAndrew Lunn if (err < 0) 9671323061aSAndrew Lunn return err; 9681323061aSAndrew Lunn 9691323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9701323061aSAndrew Lunn return 0; 9711323061aSAndrew Lunn default: 9721323061aSAndrew Lunn return -EOPNOTSUPP; 9731323061aSAndrew Lunn } 9741323061aSAndrew Lunn 9751323061aSAndrew Lunn return -EOPNOTSUPP; 9761323061aSAndrew Lunn } 9771323061aSAndrew Lunn 9781323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9791323061aSAndrew Lunn { 9801323061aSAndrew Lunn u8 status; 9811323061aSAndrew Lunn int err; 9821323061aSAndrew Lunn 9831323061aSAndrew Lunn switch (attr) { 9841323061aSAndrew Lunn case hwmon_power_input: 9851323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9861323061aSAndrew Lunn 9871323061aSAndrew Lunn case hwmon_power_lcrit: 9881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9891323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9901323061aSAndrew Lunn return 0; 9911323061aSAndrew Lunn 9921323061aSAndrew Lunn case hwmon_power_min: 9931323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9941323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9951323061aSAndrew Lunn return 0; 9961323061aSAndrew Lunn 9971323061aSAndrew Lunn case hwmon_power_max: 9981323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 9991323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10001323061aSAndrew Lunn return 0; 10011323061aSAndrew Lunn 10021323061aSAndrew Lunn case hwmon_power_crit: 10031323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 10041323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10051323061aSAndrew Lunn return 0; 10061323061aSAndrew Lunn 10071323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10081323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10091323061aSAndrew Lunn if (err < 0) 10101323061aSAndrew Lunn return err; 10111323061aSAndrew Lunn 10121323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 10131323061aSAndrew Lunn return 0; 10141323061aSAndrew Lunn 10151323061aSAndrew Lunn case hwmon_power_min_alarm: 10161323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10171323061aSAndrew Lunn if (err < 0) 10181323061aSAndrew Lunn return err; 10191323061aSAndrew Lunn 10201323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 10211323061aSAndrew Lunn return 0; 10221323061aSAndrew Lunn 10231323061aSAndrew Lunn case hwmon_power_max_alarm: 10241323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10251323061aSAndrew Lunn if (err < 0) 10261323061aSAndrew Lunn return err; 10271323061aSAndrew Lunn 10281323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 10291323061aSAndrew Lunn return 0; 10301323061aSAndrew Lunn 10311323061aSAndrew Lunn case hwmon_power_crit_alarm: 10321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10331323061aSAndrew Lunn if (err < 0) 10341323061aSAndrew Lunn return err; 10351323061aSAndrew Lunn 10361323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 10371323061aSAndrew Lunn return 0; 10381323061aSAndrew Lunn default: 10391323061aSAndrew Lunn return -EOPNOTSUPP; 10401323061aSAndrew Lunn } 10411323061aSAndrew Lunn 10421323061aSAndrew Lunn return -EOPNOTSUPP; 10431323061aSAndrew Lunn } 10441323061aSAndrew Lunn 10451323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 10461323061aSAndrew Lunn { 10471323061aSAndrew Lunn u8 status; 10481323061aSAndrew Lunn int err; 10491323061aSAndrew Lunn 10501323061aSAndrew Lunn switch (attr) { 10511323061aSAndrew Lunn case hwmon_power_input: 10521323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 10531323061aSAndrew Lunn 10541323061aSAndrew Lunn case hwmon_power_lcrit: 10551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10561323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10571323061aSAndrew Lunn return 0; 10581323061aSAndrew Lunn 10591323061aSAndrew Lunn case hwmon_power_min: 10601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10611323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10621323061aSAndrew Lunn return 0; 10631323061aSAndrew Lunn 10641323061aSAndrew Lunn case hwmon_power_max: 10651323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10661323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10671323061aSAndrew Lunn return 0; 10681323061aSAndrew Lunn 10691323061aSAndrew Lunn case hwmon_power_crit: 10701323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10711323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10721323061aSAndrew Lunn return 0; 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10761323061aSAndrew Lunn if (err < 0) 10771323061aSAndrew Lunn return err; 10781323061aSAndrew Lunn 10791323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10801323061aSAndrew Lunn return 0; 10811323061aSAndrew Lunn 10821323061aSAndrew Lunn case hwmon_power_min_alarm: 10831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10841323061aSAndrew Lunn if (err < 0) 10851323061aSAndrew Lunn return err; 10861323061aSAndrew Lunn 10871323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 10881323061aSAndrew Lunn return 0; 10891323061aSAndrew Lunn 10901323061aSAndrew Lunn case hwmon_power_max_alarm: 10911323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10921323061aSAndrew Lunn if (err < 0) 10931323061aSAndrew Lunn return err; 10941323061aSAndrew Lunn 10951323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 10961323061aSAndrew Lunn return 0; 10971323061aSAndrew Lunn 10981323061aSAndrew Lunn case hwmon_power_crit_alarm: 10991323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 11001323061aSAndrew Lunn if (err < 0) 11011323061aSAndrew Lunn return err; 11021323061aSAndrew Lunn 11031323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 11041323061aSAndrew Lunn return 0; 11051323061aSAndrew Lunn default: 11061323061aSAndrew Lunn return -EOPNOTSUPP; 11071323061aSAndrew Lunn } 11081323061aSAndrew Lunn 11091323061aSAndrew Lunn return -EOPNOTSUPP; 11101323061aSAndrew Lunn } 11111323061aSAndrew Lunn 11121323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 11131323061aSAndrew Lunn u32 attr, int channel, long *value) 11141323061aSAndrew Lunn { 11151323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 11161323061aSAndrew Lunn 11171323061aSAndrew Lunn switch (type) { 11181323061aSAndrew Lunn case hwmon_temp: 11191323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 11201323061aSAndrew Lunn case hwmon_in: 11211323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 11221323061aSAndrew Lunn case hwmon_curr: 11231323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 11241323061aSAndrew Lunn case hwmon_power: 11251323061aSAndrew Lunn switch (channel) { 11261323061aSAndrew Lunn case 0: 11271323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 11281323061aSAndrew Lunn case 1: 11291323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 11301323061aSAndrew Lunn default: 11311323061aSAndrew Lunn return -EOPNOTSUPP; 11321323061aSAndrew Lunn } 11331323061aSAndrew Lunn default: 11341323061aSAndrew Lunn return -EOPNOTSUPP; 11351323061aSAndrew Lunn } 11361323061aSAndrew Lunn } 11371323061aSAndrew Lunn 1138c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1139c1236979SAndrew Lunn "TX_power", 1140c1236979SAndrew Lunn "RX_power", 1141c1236979SAndrew Lunn }; 1142c1236979SAndrew Lunn 1143c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1144c1236979SAndrew Lunn enum hwmon_sensor_types type, 1145c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1146c1236979SAndrew Lunn { 1147c1236979SAndrew Lunn switch (type) { 1148c1236979SAndrew Lunn case hwmon_curr: 1149c1236979SAndrew Lunn switch (attr) { 1150c1236979SAndrew Lunn case hwmon_curr_label: 1151c1236979SAndrew Lunn *str = "bias"; 1152c1236979SAndrew Lunn return 0; 1153c1236979SAndrew Lunn default: 1154c1236979SAndrew Lunn return -EOPNOTSUPP; 1155c1236979SAndrew Lunn } 1156c1236979SAndrew Lunn break; 1157c1236979SAndrew Lunn case hwmon_temp: 1158c1236979SAndrew Lunn switch (attr) { 1159c1236979SAndrew Lunn case hwmon_temp_label: 1160c1236979SAndrew Lunn *str = "temperature"; 1161c1236979SAndrew Lunn return 0; 1162c1236979SAndrew Lunn default: 1163c1236979SAndrew Lunn return -EOPNOTSUPP; 1164c1236979SAndrew Lunn } 1165c1236979SAndrew Lunn break; 1166c1236979SAndrew Lunn case hwmon_in: 1167c1236979SAndrew Lunn switch (attr) { 1168c1236979SAndrew Lunn case hwmon_in_label: 1169c1236979SAndrew Lunn *str = "VCC"; 1170c1236979SAndrew Lunn return 0; 1171c1236979SAndrew Lunn default: 1172c1236979SAndrew Lunn return -EOPNOTSUPP; 1173c1236979SAndrew Lunn } 1174c1236979SAndrew Lunn break; 1175c1236979SAndrew Lunn case hwmon_power: 1176c1236979SAndrew Lunn switch (attr) { 1177c1236979SAndrew Lunn case hwmon_power_label: 1178c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1179c1236979SAndrew Lunn return 0; 1180c1236979SAndrew Lunn default: 1181c1236979SAndrew Lunn return -EOPNOTSUPP; 1182c1236979SAndrew Lunn } 1183c1236979SAndrew Lunn break; 1184c1236979SAndrew Lunn default: 1185c1236979SAndrew Lunn return -EOPNOTSUPP; 1186c1236979SAndrew Lunn } 1187c1236979SAndrew Lunn 1188c1236979SAndrew Lunn return -EOPNOTSUPP; 1189c1236979SAndrew Lunn } 1190c1236979SAndrew Lunn 11911323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11921323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11931323061aSAndrew Lunn .read = sfp_hwmon_read, 1194c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11951323061aSAndrew Lunn }; 11961323061aSAndrew Lunn 11971323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 11981323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 11991323061aSAndrew Lunn 0, 12001323061aSAndrew Lunn }; 12011323061aSAndrew Lunn 12021323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 12031323061aSAndrew Lunn .type = hwmon_chip, 12041323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 12051323061aSAndrew Lunn }; 12061323061aSAndrew Lunn 12071323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 12081323061aSAndrew Lunn HWMON_T_INPUT | 12091323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 12101323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 12111323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1212c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1213c1236979SAndrew Lunn HWMON_T_LABEL, 12141323061aSAndrew Lunn 0, 12151323061aSAndrew Lunn }; 12161323061aSAndrew Lunn 12171323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 12181323061aSAndrew Lunn .type = hwmon_temp, 12191323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 12201323061aSAndrew Lunn }; 12211323061aSAndrew Lunn 12221323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 12231323061aSAndrew Lunn HWMON_I_INPUT | 12241323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 12251323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 12261323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1227c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1228c1236979SAndrew Lunn HWMON_I_LABEL, 12291323061aSAndrew Lunn 0, 12301323061aSAndrew Lunn }; 12311323061aSAndrew Lunn 12321323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 12331323061aSAndrew Lunn .type = hwmon_in, 12341323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 12351323061aSAndrew Lunn }; 12361323061aSAndrew Lunn 12371323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 12381323061aSAndrew Lunn HWMON_C_INPUT | 12391323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 12401323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 12411323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1242c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1243c1236979SAndrew Lunn HWMON_C_LABEL, 12441323061aSAndrew Lunn 0, 12451323061aSAndrew Lunn }; 12461323061aSAndrew Lunn 12471323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 12481323061aSAndrew Lunn .type = hwmon_curr, 12491323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 12501323061aSAndrew Lunn }; 12511323061aSAndrew Lunn 12521323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 12531323061aSAndrew Lunn /* Transmit power */ 12541323061aSAndrew Lunn HWMON_P_INPUT | 12551323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12561323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12571323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1258c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1259c1236979SAndrew Lunn HWMON_P_LABEL, 12601323061aSAndrew Lunn /* Receive power */ 12611323061aSAndrew Lunn HWMON_P_INPUT | 12621323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12631323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12641323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1265c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1266c1236979SAndrew Lunn HWMON_P_LABEL, 12671323061aSAndrew Lunn 0, 12681323061aSAndrew Lunn }; 12691323061aSAndrew Lunn 12701323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 12711323061aSAndrew Lunn .type = hwmon_power, 12721323061aSAndrew Lunn .config = sfp_hwmon_power_config, 12731323061aSAndrew Lunn }; 12741323061aSAndrew Lunn 12751323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 12761323061aSAndrew Lunn &sfp_hwmon_chip, 12771323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 12781323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 12791323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 12801323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 12811323061aSAndrew Lunn NULL, 12821323061aSAndrew Lunn }; 12831323061aSAndrew Lunn 12841323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12851323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12861323061aSAndrew Lunn .info = sfp_hwmon_info, 12871323061aSAndrew Lunn }; 12881323061aSAndrew Lunn 1289139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12901323061aSAndrew Lunn { 1291139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12921323061aSAndrew Lunn int err, i; 12931323061aSAndrew Lunn 1294426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1295426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1296426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1297426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1298426c6cbcSPali Rohár * skip registration of hwmon device. 1299426c6cbcSPali Rohár */ 1300426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1301426c6cbcSPali Rohár dev_info(sfp->dev, 1302426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1303426c6cbcSPali Rohár dev_info(sfp->dev, 1304426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1305426c6cbcSPali Rohár return; 1306426c6cbcSPali Rohár } 1307426c6cbcSPali Rohár 1308139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1309139d3a21SRussell King if (err < 0) { 1310139d3a21SRussell King if (sfp->hwmon_tries--) { 1311139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1312139d3a21SRussell King T_PROBE_RETRY_SLOW); 1313139d3a21SRussell King } else { 1314*9ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 1315*9ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1316139d3a21SRussell King } 1317139d3a21SRussell King return; 1318139d3a21SRussell King } 1319139d3a21SRussell King 1320139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1321139d3a21SRussell King if (!sfp->hwmon_name) { 1322139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1323139d3a21SRussell King return; 1324139d3a21SRussell King } 1325139d3a21SRussell King 1326139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1327139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1328139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1329139d3a21SRussell King 1330139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1331139d3a21SRussell King sfp->hwmon_name, sfp, 1332139d3a21SRussell King &sfp_hwmon_chip_info, 1333139d3a21SRussell King NULL); 1334139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1335139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1336139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1337139d3a21SRussell King } 1338139d3a21SRussell King 1339139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1340139d3a21SRussell King { 13411323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 13421323061aSAndrew Lunn return 0; 13431323061aSAndrew Lunn 13441323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 13451323061aSAndrew Lunn return 0; 13461323061aSAndrew Lunn 13471323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 13481323061aSAndrew Lunn /* This driver in general does not support address 13491323061aSAndrew Lunn * change. 13501323061aSAndrew Lunn */ 13511323061aSAndrew Lunn return 0; 13521323061aSAndrew Lunn 1353139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1354139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 13551323061aSAndrew Lunn 1356139d3a21SRussell King return 0; 13571323061aSAndrew Lunn } 13581323061aSAndrew Lunn 13591323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13601323061aSAndrew Lunn { 1361139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13623e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13631323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13643e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13651323061aSAndrew Lunn kfree(sfp->hwmon_name); 13661323061aSAndrew Lunn } 13673e322474SAndrew Lunn } 1368139d3a21SRussell King 1369139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1370139d3a21SRussell King { 1371139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1372139d3a21SRussell King 1373139d3a21SRussell King return 0; 1374139d3a21SRussell King } 1375139d3a21SRussell King 1376139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1377139d3a21SRussell King { 1378139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1379139d3a21SRussell King } 13801323061aSAndrew Lunn #else 13811323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13821323061aSAndrew Lunn { 13831323061aSAndrew Lunn return 0; 13841323061aSAndrew Lunn } 13851323061aSAndrew Lunn 13861323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13871323061aSAndrew Lunn { 13881323061aSAndrew Lunn } 1389139d3a21SRussell King 1390139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1391139d3a21SRussell King { 1392139d3a21SRussell King return 0; 1393139d3a21SRussell King } 1394139d3a21SRussell King 1395139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1396139d3a21SRussell King { 1397139d3a21SRussell King } 13981323061aSAndrew Lunn #endif 13991323061aSAndrew Lunn 140073970055SRussell King /* Helpers */ 140173970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 140273970055SRussell King { 140373970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 140473970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 140573970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 140673970055SRussell King sfp_set_state(sfp, sfp->state); 140773970055SRussell King } 140873970055SRussell King 140973970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 141073970055SRussell King { 141173970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 141273970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 141373970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 141473970055SRussell King sfp_set_state(sfp, sfp->state); 141573970055SRussell King } 141673970055SRussell King 14179cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 14189cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 14199cc8976cSRussell King { 14209cc8976cSRussell King struct sfp *sfp = s->private; 14219cc8976cSRussell King 14229cc8976cSRussell King seq_printf(s, "Module state: %s\n", 14239cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 14249cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 14259cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 14269cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 14279cc8976cSRussell King seq_printf(s, "Device state: %s\n", 14289cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 14299cc8976cSRussell King seq_printf(s, "Main state: %s\n", 14309cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 14319cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 14329cc8976cSRussell King sfp->sm_fault_retries); 14339cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 14349cc8976cSRussell King sfp->sm_phy_retries); 14359cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 14369cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 14379cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 14389cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 14399cc8976cSRussell King return 0; 14409cc8976cSRussell King } 14419cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 14429cc8976cSRussell King 14439cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14449cc8976cSRussell King { 14459cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 14469cc8976cSRussell King 14479cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 14489cc8976cSRussell King &sfp_debug_state_fops); 14499cc8976cSRussell King } 14509cc8976cSRussell King 14519cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14529cc8976cSRussell King { 14539cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 14549cc8976cSRussell King } 14559cc8976cSRussell King #else 14569cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14579cc8976cSRussell King { 14589cc8976cSRussell King } 14599cc8976cSRussell King 14609cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14619cc8976cSRussell King { 14629cc8976cSRussell King } 14639cc8976cSRussell King #endif 14649cc8976cSRussell King 146573970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 146673970055SRussell King { 146773970055SRussell King unsigned int state = sfp->state; 146873970055SRussell King 146973970055SRussell King if (state & SFP_F_TX_DISABLE) 147073970055SRussell King return; 147173970055SRussell King 147273970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 147373970055SRussell King 147473970055SRussell King udelay(T_RESET_US); 147573970055SRussell King 147673970055SRussell King sfp_set_state(sfp, state); 147773970055SRussell King } 147873970055SRussell King 147973970055SRussell King /* SFP state machine */ 148073970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 148173970055SRussell King { 148273970055SRussell King if (timeout) 148373970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 148473970055SRussell King timeout); 148573970055SRussell King else 148673970055SRussell King cancel_delayed_work(&sfp->timeout); 148773970055SRussell King } 148873970055SRussell King 148973970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 149073970055SRussell King unsigned int timeout) 149173970055SRussell King { 149273970055SRussell King sfp->sm_state = state; 149373970055SRussell King sfp_sm_set_timer(sfp, timeout); 149473970055SRussell King } 149573970055SRussell King 14960936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1497516b29edSFlorian Fainelli unsigned int timeout) 149873970055SRussell King { 149973970055SRussell King sfp->sm_mod_state = state; 150073970055SRussell King sfp_sm_set_timer(sfp, timeout); 150173970055SRussell King } 150273970055SRussell King 150373970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 150473970055SRussell King { 150573970055SRussell King sfp_remove_phy(sfp->sfp_bus); 150673970055SRussell King phy_device_remove(sfp->mod_phy); 150773970055SRussell King phy_device_free(sfp->mod_phy); 150873970055SRussell King sfp->mod_phy = NULL; 150973970055SRussell King } 151073970055SRussell King 1511256e43cbSRussell King static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) 151273970055SRussell King { 151373970055SRussell King struct phy_device *phy; 151473970055SRussell King int err; 151573970055SRussell King 15169a484621SRussell King phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); 15171cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 15181cb89a14SRussell King return PTR_ERR(phy); 151920b56ed9SRussell King if (IS_ERR(phy)) { 1520*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1521256e43cbSRussell King return PTR_ERR(phy); 152273970055SRussell King } 152373970055SRussell King 15249a484621SRussell King err = phy_device_register(phy); 15259a484621SRussell King if (err) { 15269a484621SRussell King phy_device_free(phy); 1527*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 1528*9ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1529256e43cbSRussell King return err; 15309a484621SRussell King } 15319a484621SRussell King 153273970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 153373970055SRussell King if (err) { 153473970055SRussell King phy_device_remove(phy); 153573970055SRussell King phy_device_free(phy); 1536*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1537256e43cbSRussell King return err; 153873970055SRussell King } 153973970055SRussell King 154073970055SRussell King sfp->mod_phy = phy; 1541256e43cbSRussell King 1542256e43cbSRussell King return 0; 154373970055SRussell King } 154473970055SRussell King 154573970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 154673970055SRussell King { 154773970055SRussell King sfp_link_up(sfp->sfp_bus); 154873970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 154973970055SRussell King } 155073970055SRussell King 155173970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 155273970055SRussell King { 155373970055SRussell King sfp_link_down(sfp->sfp_bus); 155473970055SRussell King } 155573970055SRussell King 155673970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 155773970055SRussell King { 1558624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1559624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1560624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1561624407d2SRussell King bool los = false; 156273970055SRussell King 1563710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1564624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1565624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 156673970055SRussell King */ 1567624407d2SRussell King if (los_options == los_inverted) 1568624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1569624407d2SRussell King else if (los_options == los_normal) 1570624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 157173970055SRussell King 157273970055SRussell King if (los) 157373970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 157473970055SRussell King else 157573970055SRussell King sfp_sm_link_up(sfp); 157673970055SRussell King } 157773970055SRussell King 1578710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1579710dfbb0SRussell King { 1580624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1581624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1582624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1583624407d2SRussell King 1584624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1585624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1586710dfbb0SRussell King } 1587710dfbb0SRussell King 1588710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1589710dfbb0SRussell King { 1590624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1591624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1592624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1593624407d2SRussell King 1594624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1595624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1596710dfbb0SRussell King } 1597710dfbb0SRussell King 159863ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 159973970055SRussell King { 1600281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1601516b29edSFlorian Fainelli dev_err(sfp->dev, 1602516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 160373970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 160473970055SRussell King } else { 160573970055SRussell King if (warn) 160673970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 160773970055SRussell King 160863ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 160973970055SRussell King } 161073970055SRussell King } 161173970055SRussell King 16129a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 16139a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 16149a484621SRussell King * or clause 45 PHY. 16159a484621SRussell King * 16169a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 16179a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 16189a484621SRussell King * PHY driver to determine. 16199a484621SRussell King * 16209a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 16219a484621SRussell King * mode according to the negotiated line speed. 16229a484621SRussell King */ 1623256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1624181f29daSRussell King { 1625256e43cbSRussell King int err = 0; 1626256e43cbSRussell King 16279a484621SRussell King switch (sfp->id.base.extended_cc) { 16289a484621SRussell King case SFF8024_ECC_10GBASE_T_SFI: 16299a484621SRussell King case SFF8024_ECC_10GBASE_T_SR: 16309a484621SRussell King case SFF8024_ECC_5GBASE_T: 16319a484621SRussell King case SFF8024_ECC_2_5GBASE_T: 1632256e43cbSRussell King err = sfp_sm_probe_phy(sfp, true); 16339a484621SRussell King break; 16349a484621SRussell King 16359a484621SRussell King default: 1636fa2de660SRussell King if (sfp->id.base.e1000_base_t) 1637256e43cbSRussell King err = sfp_sm_probe_phy(sfp, false); 16389a484621SRussell King break; 16399a484621SRussell King } 1640256e43cbSRussell King return err; 164173970055SRussell King } 164273970055SRussell King 1643ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 16443bb35261SJon Nettleton { 1645ed32abb1SRussell King u32 power_mW = 1000; 16465765cee1SRussell King (Oracle) bool supports_a2; 16473bb35261SJon Nettleton 16483bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1649ed32abb1SRussell King power_mW = 1500; 16503bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1651ed32abb1SRussell King power_mW = 2000; 16523bb35261SJon Nettleton 16535765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 16545765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 16555765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 16565765cee1SRussell King (Oracle) 1657ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 16587cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 16595765cee1SRussell King (Oracle) if (!supports_a2) { 16607cfa9c92SRussell King /* The module appears not to implement bus address 16617cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 16627cfa9c92SRussell King * indicated mode. 16637cfa9c92SRussell King */ 16643bb35261SJon Nettleton dev_err(sfp->dev, 16653bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1666ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16673bb35261SJon Nettleton return -EINVAL; 16687cfa9c92SRussell King } else { 16693bb35261SJon Nettleton dev_warn(sfp->dev, 16703bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1671ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16723bb35261SJon Nettleton return 0; 16733bb35261SJon Nettleton } 16747cfa9c92SRussell King } 16757cfa9c92SRussell King 16765765cee1SRussell King (Oracle) if (power_mW <= 1000) { 16775765cee1SRussell King (Oracle) /* Modules below 1W do not require a power change sequence */ 16785765cee1SRussell King (Oracle) sfp->module_power_mW = power_mW; 16795765cee1SRussell King (Oracle) return 0; 16805765cee1SRussell King (Oracle) } 16815765cee1SRussell King (Oracle) 16825765cee1SRussell King (Oracle) if (!supports_a2) { 16835765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 16845765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 16855765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 16865765cee1SRussell King (Oracle) */ 16875765cee1SRussell King (Oracle) return 0; 16885765cee1SRussell King (Oracle) } 16895765cee1SRussell King (Oracle) 16907cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 16917cfa9c92SRussell King * an address change sequence, warn the user that the module may 16927cfa9c92SRussell King * not be functional. 16937cfa9c92SRussell King */ 16945765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 16957cfa9c92SRussell King dev_warn(sfp->dev, 169607f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 16977cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 16987cfa9c92SRussell King return 0; 16997cfa9c92SRussell King } 17003bb35261SJon Nettleton 1701ed32abb1SRussell King sfp->module_power_mW = power_mW; 1702ed32abb1SRussell King 1703ed32abb1SRussell King return 0; 1704ed32abb1SRussell King } 1705ed32abb1SRussell King 1706b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1707ed32abb1SRussell King { 1708ed32abb1SRussell King u8 val; 1709ed32abb1SRussell King int err; 1710ed32abb1SRussell King 17113bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 17123bb35261SJon Nettleton if (err != sizeof(val)) { 1713*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "Failed to read EEPROM: %pe\n", ERR_PTR(err)); 1714b036a554SRussell King return -EAGAIN; 17153bb35261SJon Nettleton } 17163bb35261SJon Nettleton 17179a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 17189a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 17199a484621SRussell King * if the bit is already set, we're already in high power mode. 17209a484621SRussell King */ 17219a484621SRussell King if (!!(val & BIT(0)) == enable) 17229a484621SRussell King return 0; 17239a484621SRussell King 1724b036a554SRussell King if (enable) 17253bb35261SJon Nettleton val |= BIT(0); 1726b036a554SRussell King else 1727b036a554SRussell King val &= ~BIT(0); 17283bb35261SJon Nettleton 17293bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 17303bb35261SJon Nettleton if (err != sizeof(val)) { 1731*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "Failed to write EEPROM: %pe\n", 1732*9ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1733b036a554SRussell King return -EAGAIN; 17343bb35261SJon Nettleton } 17353bb35261SJon Nettleton 1736b036a554SRussell King if (enable) 17373bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1738ed32abb1SRussell King sfp->module_power_mW / 1000, 1739ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 17403bb35261SJon Nettleton 1741b036a554SRussell King return 0; 17423bb35261SJon Nettleton } 17433bb35261SJon Nettleton 1744426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1745426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1746426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1747426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1748426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1749426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1750426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1751426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1752426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1753426c6cbcSPali Rohár * at a time. 17540d035bedSRussell King */ 1755426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 17560d035bedSRussell King { 1757426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 17580d035bedSRussell King 1759426c6cbcSPali Rohár /* Already using byte IO */ 1760426c6cbcSPali Rohár if (block_size == 1) 1761426c6cbcSPali Rohár return false; 1762426c6cbcSPali Rohár 1763426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1764426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1765426c6cbcSPali Rohár return false; 17660d035bedSRussell King } 1767426c6cbcSPali Rohár return true; 17680d035bedSRussell King } 17690d035bedSRussell King 1770b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1771b18432c5SChris Healy { 1772b18432c5SChris Healy u8 check; 1773b18432c5SChris Healy int err; 1774b18432c5SChris Healy 1775b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1776b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1777b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1778b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1779b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1780b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1781b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1782b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1783b18432c5SChris Healy if (err != 3) { 1784*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 1785*9ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 1786*9ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1787b18432c5SChris Healy return err; 1788b18432c5SChris Healy } 1789b18432c5SChris Healy 1790b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1791b18432c5SChris Healy mdelay(50); 1792b18432c5SChris Healy 1793b18432c5SChris Healy /* Update base structure checksum */ 1794b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1795b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1796b18432c5SChris Healy if (err != 1) { 1797*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 1798*9ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 1799*9ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1800b18432c5SChris Healy return err; 1801b18432c5SChris Healy } 1802b18432c5SChris Healy } 1803b18432c5SChris Healy return 0; 1804b18432c5SChris Healy } 1805b18432c5SChris Healy 1806e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 180773970055SRussell King { 180873970055SRussell King /* SFP module inserted - read I2C data */ 180973970055SRussell King struct sfp_eeprom_id id; 1810b18432c5SChris Healy bool cotsworks_sfbg; 1811981f1f80SRussell King bool cotsworks; 181273970055SRussell King u8 check; 18133bb35261SJon Nettleton int ret; 181473970055SRussell King 1815426c6cbcSPali Rohár /* Some SFP modules and also some Linux I2C drivers do not like reads 1816426c6cbcSPali Rohár * longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at 1817426c6cbcSPali Rohár * a time. 18180d035bedSRussell King */ 1819426c6cbcSPali Rohár sfp->i2c_block_size = 16; 18200d035bedSRussell King 18210d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 18223bb35261SJon Nettleton if (ret < 0) { 1823e117be74SRussell King if (report) 1824*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 1825*9ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 182673970055SRussell King return -EAGAIN; 182773970055SRussell King } 182873970055SRussell King 18290d035bedSRussell King if (ret != sizeof(id.base)) { 1830*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 183173970055SRussell King return -EAGAIN; 183273970055SRussell King } 183373970055SRussell King 1834426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1835426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1836426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1837426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1838426c6cbcSPali Rohár * is really required and we have no other option. 1839426c6cbcSPali Rohár */ 1840426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1841426c6cbcSPali Rohár dev_info(sfp->dev, 1842426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1843426c6cbcSPali Rohár dev_info(sfp->dev, 1844426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1845426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1846426c6cbcSPali Rohár 1847426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1848426c6cbcSPali Rohár if (ret < 0) { 1849426c6cbcSPali Rohár if (report) 1850*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 1851*9ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 1852*9ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1853426c6cbcSPali Rohár return -EAGAIN; 1854426c6cbcSPali Rohár } 1855426c6cbcSPali Rohár 1856426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 1857*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 1858*9ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1859426c6cbcSPali Rohár return -EAGAIN; 1860426c6cbcSPali Rohár } 1861426c6cbcSPali Rohár } 1862426c6cbcSPali Rohár 1863981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1864981f1f80SRussell King * do the final programming with the final module part number, 1865981f1f80SRussell King * serial number and date code. 1866981f1f80SRussell King */ 1867981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1868b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1869b18432c5SChris Healy 1870b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1871b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1872b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1873b18432c5SChris Healy */ 1874b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1875b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1876b18432c5SChris Healy if (ret < 0) 1877b18432c5SChris Healy return ret; 1878b18432c5SChris Healy } 1879981f1f80SRussell King 188073970055SRussell King /* Validate the checksum over the base structure */ 188173970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 188273970055SRussell King if (check != id.base.cc_base) { 1883981f1f80SRussell King if (cotsworks) { 1884981f1f80SRussell King dev_warn(sfp->dev, 1885981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1886981f1f80SRussell King check, id.base.cc_base); 1887981f1f80SRussell King } else { 188873970055SRussell King dev_err(sfp->dev, 1889981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1890981f1f80SRussell King check, id.base.cc_base); 189173970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1892981f1f80SRussell King 16, 1, &id, sizeof(id), true); 189373970055SRussell King return -EINVAL; 189473970055SRussell King } 1895981f1f80SRussell King } 189673970055SRussell King 18970d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 18980d035bedSRussell King if (ret < 0) { 18990d035bedSRussell King if (report) 1900*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 1901*9ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 19020d035bedSRussell King return -EAGAIN; 19030d035bedSRussell King } 19040d035bedSRussell King 19050d035bedSRussell King if (ret != sizeof(id.ext)) { 1906*9ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 19070d035bedSRussell King return -EAGAIN; 19080d035bedSRussell King } 19090d035bedSRussell King 191073970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 191173970055SRussell King if (check != id.ext.cc_ext) { 1912981f1f80SRussell King if (cotsworks) { 1913981f1f80SRussell King dev_warn(sfp->dev, 1914981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1915981f1f80SRussell King check, id.ext.cc_ext); 1916981f1f80SRussell King } else { 191773970055SRussell King dev_err(sfp->dev, 1918981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1919981f1f80SRussell King check, id.ext.cc_ext); 1920981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1921981f1f80SRussell King 16, 1, &id, sizeof(id), true); 192273970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 192373970055SRussell King } 1924981f1f80SRussell King } 192573970055SRussell King 192673970055SRussell King sfp->id = id; 192773970055SRussell King 1928a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1929a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1930a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1931a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1932a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1933a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 193473970055SRussell King 1935259c8618SRussell King /* Check whether we support this module */ 1936f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1937259c8618SRussell King dev_err(sfp->dev, 1938259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 193973970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 194073970055SRussell King return -EINVAL; 194173970055SRussell King } 194273970055SRussell King 1943ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1944ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1945ec7681bdSRussell King dev_warn(sfp->dev, 1946ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1947ec7681bdSRussell King 1948ed32abb1SRussell King /* Parse the module power requirement */ 1949ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1950ed32abb1SRussell King if (ret < 0) 1951ed32abb1SRussell King return ret; 1952ed32abb1SRussell King 195326c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 195426c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 195526c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 195626c97a2dSRussell King else 195726c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 195826c97a2dSRussell King 1959b036a554SRussell King return 0; 196073970055SRussell King } 196173970055SRussell King 196273970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 196373970055SRussell King { 196473f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 196573970055SRussell King sfp_module_remove(sfp->sfp_bus); 196673970055SRussell King 19671323061aSAndrew Lunn sfp_hwmon_remove(sfp); 19681323061aSAndrew Lunn 196973970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1970ed32abb1SRussell King sfp->module_power_mW = 0; 197173970055SRussell King 197273970055SRussell King dev_info(sfp->dev, "module removed\n"); 197373970055SRussell King } 197473970055SRussell King 19756b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1976e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 197773970055SRussell King { 1978e85d81a1SRussell King switch (sfp->sm_dev_state) { 1979e85d81a1SRussell King default: 19806b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 19816b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 19826b0da5c9SRussell King break; 19836b0da5c9SRussell King 19846b0da5c9SRussell King case SFP_DEV_DOWN: 19856b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 19866b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 19876b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1988e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1989e85d81a1SRussell King break; 199073970055SRussell King 1991e85d81a1SRussell King case SFP_DEV_UP: 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_DOWN) 1995e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1996e85d81a1SRussell King break; 1997e85d81a1SRussell King } 1998e85d81a1SRussell King } 199973970055SRussell King 2000d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 2001d900954fSRussell King * the on-board EEPROM, and sets up the power level. 200273970055SRussell King */ 2003e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 2004e85d81a1SRussell King { 2005b036a554SRussell King int err; 2006b036a554SRussell King 2007b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 2008b036a554SRussell King if (event == SFP_E_REMOVE) { 2009d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 2010d2e816c0SRussell King sfp_sm_mod_remove(sfp); 2011b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 2012b036a554SRussell King return; 2013b036a554SRussell King } 2014b036a554SRussell King 2015b036a554SRussell King /* Handle device detach globally */ 201673f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 201773f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 2018b036a554SRussell King if (sfp->module_power_mW > 1000 && 2019b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 2020b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 202173f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2022d2e816c0SRussell King return; 2023d2e816c0SRussell King } 2024d2e816c0SRussell King 202573970055SRussell King switch (sfp->sm_mod_state) { 202673970055SRussell King default: 2027e117be74SRussell King if (event == SFP_E_INSERT) { 2028d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2029e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2030e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2031e117be74SRussell King } 203273970055SRussell King break; 203373970055SRussell King 203473970055SRussell King case SFP_MOD_PROBE: 203573f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2036b036a554SRussell King if (event != SFP_E_TIMEOUT) 2037b036a554SRussell King break; 203873970055SRussell King 2039e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2040b036a554SRussell King if (err == -EAGAIN) { 2041e117be74SRussell King if (sfp->sm_mod_tries_init && 2042e117be74SRussell King --sfp->sm_mod_tries_init) { 2043e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2044b036a554SRussell King break; 2045e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2046e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2047e117be74SRussell King dev_warn(sfp->dev, 2048e117be74SRussell King "please wait, module slow to respond\n"); 2049e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2050e117be74SRussell King break; 2051e117be74SRussell King } 2052b036a554SRussell King } 2053b036a554SRussell King if (err < 0) { 2054b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2055b036a554SRussell King break; 2056b036a554SRussell King } 2057b036a554SRussell King 205838ecd706SRussell King err = sfp_hwmon_insert(sfp); 205938ecd706SRussell King if (err) 2060*9ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 2061*9ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 206238ecd706SRussell King 206373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2064df561f66SGustavo A. R. Silva fallthrough; 206573f5e847SRussell King case SFP_MOD_WAITDEV: 206673f5e847SRussell King /* Ensure that the device is attached before proceeding */ 206773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 206873f5e847SRussell King break; 206973f5e847SRussell King 207073f5e847SRussell King /* Report the module insertion to the upstream device */ 207173f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 207273f5e847SRussell King if (err < 0) { 207373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 207473f5e847SRussell King break; 207573f5e847SRussell King } 207673f5e847SRussell King 2077b036a554SRussell King /* If this is a power level 1 module, we are done */ 2078b036a554SRussell King if (sfp->module_power_mW <= 1000) 2079b036a554SRussell King goto insert; 2080b036a554SRussell King 2081b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2082df561f66SGustavo A. R. Silva fallthrough; 2083b036a554SRussell King case SFP_MOD_HPOWER: 2084b036a554SRussell King /* Enable high power mode */ 2085b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 208673f5e847SRussell King if (err < 0) { 208773f5e847SRussell King if (err != -EAGAIN) { 208873f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 20890936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 209073f5e847SRussell King } else { 2091e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 209273f5e847SRussell King } 209373f5e847SRussell King break; 209473f5e847SRussell King } 209573f5e847SRussell King 209673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 209773970055SRussell King break; 209873970055SRussell King 2099b036a554SRussell King case SFP_MOD_WAITPWR: 2100b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2101b036a554SRussell King if (event != SFP_E_TIMEOUT) 2102b036a554SRussell King break; 2103b036a554SRussell King 2104b036a554SRussell King insert: 21050936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 21063bb35261SJon Nettleton break; 2107b036a554SRussell King 210873970055SRussell King case SFP_MOD_PRESENT: 210973970055SRussell King case SFP_MOD_ERROR: 211073970055SRussell King break; 211173970055SRussell King } 211273970055SRussell King } 211373970055SRussell King 2114e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2115e85d81a1SRussell King { 2116eefa6f1fSRussell King unsigned long timeout; 21171cb89a14SRussell King int ret; 2118eefa6f1fSRussell King 211973970055SRussell King /* Some events are global */ 212073970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 212173970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 212273970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 212373970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 212473970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 212573970055SRussell King sfp_sm_link_down(sfp); 212674c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 212774c551caSRussell King sfp_module_stop(sfp->sfp_bus); 212873970055SRussell King if (sfp->mod_phy) 212973970055SRussell King sfp_sm_phy_detach(sfp); 21301539e0d3SRussell King sfp_module_tx_disable(sfp); 2131f3c9a666SRussell King sfp_soft_stop_poll(sfp); 213273970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 213373970055SRussell King return; 213473970055SRussell King } 213573970055SRussell King 213673970055SRussell King /* The main state machine */ 213773970055SRussell King switch (sfp->sm_state) { 213873970055SRussell King case SFP_S_DOWN: 2139eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2140eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2141eefa6f1fSRussell King break; 2142eefa6f1fSRussell King 2143f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2144f3c9a666SRussell King sfp_soft_start_poll(sfp); 2145f3c9a666SRussell King 2146f3c9a666SRussell King sfp_module_tx_enable(sfp); 2147eefa6f1fSRussell King 2148eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2149281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2150eefa6f1fSRussell King 2151eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2152eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2153eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 2154eefa6f1fSRussell King */ 2155eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 2156eefa6f1fSRussell King break; 2157eefa6f1fSRussell King 2158eefa6f1fSRussell King case SFP_S_WAIT: 2159eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2160eefa6f1fSRussell King break; 2161eefa6f1fSRussell King 2162eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 216326c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 216426c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 216526c97a2dSRussell King * initialise, which is indicated by TX_FAULT 216626c97a2dSRussell King * deasserting. 2167181f29daSRussell King */ 216826c97a2dSRussell King timeout = sfp->module_t_start_up; 2169eefa6f1fSRussell King if (timeout > T_WAIT) 2170eefa6f1fSRussell King timeout -= T_WAIT; 2171eefa6f1fSRussell King else 2172eefa6f1fSRussell King timeout = 1; 2173eefa6f1fSRussell King 2174eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2175eefa6f1fSRussell King } else { 2176eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2177eefa6f1fSRussell King * finished initialising. 2178eefa6f1fSRussell King */ 2179eefa6f1fSRussell King goto init_done; 2180181f29daSRussell King } 218173970055SRussell King break; 218273970055SRussell King 218373970055SRussell King case SFP_S_INIT: 2184d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2185e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 218626c97a2dSRussell King * or t_start_up, so assume there is a fault. 2187d23751a0SRussell King */ 2188d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2189281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2190d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 21911cb89a14SRussell King init_done: 21921cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 21931cb89a14SRussell King goto phy_probe; 21941cb89a14SRussell King } 21951cb89a14SRussell King break; 21961cb89a14SRussell King 21971cb89a14SRussell King case SFP_S_INIT_PHY: 21981cb89a14SRussell King if (event != SFP_E_TIMEOUT) 21991cb89a14SRussell King break; 22001cb89a14SRussell King phy_probe: 22011cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2202d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2203d23751a0SRussell King */ 22041cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 22051cb89a14SRussell King if (ret == -ENODEV) { 22061cb89a14SRussell King if (--sfp->sm_phy_retries) { 22071cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 22081cb89a14SRussell King break; 22091cb89a14SRussell King } else { 22101cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 22111cb89a14SRussell King } 22121cb89a14SRussell King } else if (ret) { 2213256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2214256e43cbSRussell King break; 2215256e43cbSRussell King } 221674c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 221774c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 221874c551caSRussell King break; 221974c551caSRussell King } 2220d23751a0SRussell King sfp_sm_link_check_los(sfp); 2221d23751a0SRussell King 2222d23751a0SRussell King /* Reset the fault retry count */ 2223281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2224d23751a0SRussell King break; 2225d23751a0SRussell King 2226d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2227d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2228d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 222926c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2230d23751a0SRussell King } 223173970055SRussell King break; 223273970055SRussell King 223373970055SRussell King case SFP_S_WAIT_LOS: 223473970055SRussell King if (event == SFP_E_TX_FAULT) 223563ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2236710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 223773970055SRussell King sfp_sm_link_up(sfp); 223873970055SRussell King break; 223973970055SRussell King 224073970055SRussell King case SFP_S_LINK_UP: 224173970055SRussell King if (event == SFP_E_TX_FAULT) { 224273970055SRussell King sfp_sm_link_down(sfp); 224363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2244710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 224573970055SRussell King sfp_sm_link_down(sfp); 224673970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 224773970055SRussell King } 224873970055SRussell King break; 224973970055SRussell King 225073970055SRussell King case SFP_S_TX_FAULT: 225173970055SRussell King if (event == SFP_E_TIMEOUT) { 225273970055SRussell King sfp_module_tx_fault_reset(sfp); 225326c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 225473970055SRussell King } 225573970055SRussell King break; 225673970055SRussell King 225773970055SRussell King case SFP_S_REINIT: 225873970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 225963ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 226073970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 226173970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 226273970055SRussell King sfp_sm_link_check_los(sfp); 226373970055SRussell King } 226473970055SRussell King break; 226573970055SRussell King 226673970055SRussell King case SFP_S_TX_DISABLE: 226773970055SRussell King break; 226873970055SRussell King } 2269e85d81a1SRussell King } 2270e85d81a1SRussell King 2271e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2272e85d81a1SRussell King { 2273e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2274e85d81a1SRussell King 2275e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2276e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2277e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2278e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2279e85d81a1SRussell King event_to_str(event)); 2280e85d81a1SRussell King 2281e85d81a1SRussell King sfp_sm_device(sfp, event); 22826b0da5c9SRussell King sfp_sm_module(sfp, event); 2283e85d81a1SRussell King sfp_sm_main(sfp, event); 228473970055SRussell King 22854005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 22864005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 22874005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 22884005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 228973970055SRussell King 229073970055SRussell King mutex_unlock(&sfp->sm_mutex); 229173970055SRussell King } 229273970055SRussell King 2293b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2294b5bfc21aSRussell King { 22956b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2296b5bfc21aSRussell King } 2297b5bfc21aSRussell King 2298b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2299b5bfc21aSRussell King { 23006b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2301b5bfc21aSRussell King } 2302b5bfc21aSRussell King 230373970055SRussell King static void sfp_start(struct sfp *sfp) 230473970055SRussell King { 230573970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 230673970055SRussell King } 230773970055SRussell King 230873970055SRussell King static void sfp_stop(struct sfp *sfp) 230973970055SRussell King { 231073970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 231173970055SRussell King } 231273970055SRussell King 231373970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 231473970055SRussell King { 231573970055SRussell King /* locking... and check module is present */ 231673970055SRussell King 2317ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2318ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 231973970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 232073970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 232173970055SRussell King } else { 232273970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 232373970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 232473970055SRussell King } 232573970055SRussell King return 0; 232673970055SRussell King } 232773970055SRussell King 232873970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 232973970055SRussell King u8 *data) 233073970055SRussell King { 233173970055SRussell King unsigned int first, last, len; 233273970055SRussell King int ret; 233373970055SRussell King 233473970055SRussell King if (ee->len == 0) 233573970055SRussell King return -EINVAL; 233673970055SRussell King 233773970055SRussell King first = ee->offset; 233873970055SRussell King last = ee->offset + ee->len; 233973970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 234073970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 234173970055SRussell King len -= first; 234273970055SRussell King 23432794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 234473970055SRussell King if (ret < 0) 234573970055SRussell King return ret; 234673970055SRussell King 234773970055SRussell King first += len; 234873970055SRussell King data += len; 234973970055SRussell King } 23502794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 235173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 235273970055SRussell King len -= first; 235373970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 235473970055SRussell King 23552794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 235673970055SRussell King if (ret < 0) 235773970055SRussell King return ret; 235873970055SRussell King } 235973970055SRussell King return 0; 236073970055SRussell King } 236173970055SRussell King 2362d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2363d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2364d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2365d740513fSAndrew Lunn { 2366d740513fSAndrew Lunn if (page->bank) { 2367d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2368d740513fSAndrew Lunn return -EOPNOTSUPP; 2369d740513fSAndrew Lunn } 2370d740513fSAndrew Lunn 2371d740513fSAndrew Lunn if (page->page) { 2372d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2373d740513fSAndrew Lunn return -EOPNOTSUPP; 2374d740513fSAndrew Lunn } 2375d740513fSAndrew Lunn 2376d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2377d740513fSAndrew Lunn page->i2c_address != 0x51) { 2378d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2379d740513fSAndrew Lunn return -EOPNOTSUPP; 2380d740513fSAndrew Lunn } 2381d740513fSAndrew Lunn 2382d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2383d740513fSAndrew Lunn page->data, page->length); 2384d740513fSAndrew Lunn }; 2385d740513fSAndrew Lunn 238673970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2387b5bfc21aSRussell King .attach = sfp_attach, 2388b5bfc21aSRussell King .detach = sfp_detach, 238973970055SRussell King .start = sfp_start, 239073970055SRussell King .stop = sfp_stop, 239173970055SRussell King .module_info = sfp_module_info, 239273970055SRussell King .module_eeprom = sfp_module_eeprom, 2393d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 239473970055SRussell King }; 239573970055SRussell King 239673970055SRussell King static void sfp_timeout(struct work_struct *work) 239773970055SRussell King { 239873970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 239973970055SRussell King 240073970055SRussell King rtnl_lock(); 240173970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 240273970055SRussell King rtnl_unlock(); 240373970055SRussell King } 240473970055SRussell King 240573970055SRussell King static void sfp_check_state(struct sfp *sfp) 240673970055SRussell King { 240773970055SRussell King unsigned int state, i, changed; 240873970055SRussell King 24092158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 241073970055SRussell King state = sfp_get_state(sfp); 241173970055SRussell King changed = state ^ sfp->state; 241273970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 241373970055SRussell King 241473970055SRussell King for (i = 0; i < GPIO_MAX; i++) 241573970055SRussell King if (changed & BIT(i)) 241673970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 241773970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 241873970055SRussell King 241973970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 242073970055SRussell King sfp->state = state; 242173970055SRussell King 242273970055SRussell King rtnl_lock(); 242373970055SRussell King if (changed & SFP_F_PRESENT) 242473970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 242573970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 242673970055SRussell King 242773970055SRussell King if (changed & SFP_F_TX_FAULT) 242873970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 242973970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 243073970055SRussell King 243173970055SRussell King if (changed & SFP_F_LOS) 243273970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 243373970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 243473970055SRussell King rtnl_unlock(); 24352158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 243673970055SRussell King } 243773970055SRussell King 243873970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 243973970055SRussell King { 244073970055SRussell King struct sfp *sfp = data; 244173970055SRussell King 244273970055SRussell King sfp_check_state(sfp); 244373970055SRussell King 244473970055SRussell King return IRQ_HANDLED; 244573970055SRussell King } 244673970055SRussell King 244773970055SRussell King static void sfp_poll(struct work_struct *work) 244873970055SRussell King { 244973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 245073970055SRussell King 245173970055SRussell King sfp_check_state(sfp); 2452f3c9a666SRussell King 2453f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2454f3c9a666SRussell King sfp->need_poll) 245573970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 245673970055SRussell King } 245773970055SRussell King 245873970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 245973970055SRussell King { 246073970055SRussell King struct sfp *sfp; 246173970055SRussell King 246273970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 246373970055SRussell King if (!sfp) 246473970055SRussell King return ERR_PTR(-ENOMEM); 246573970055SRussell King 246673970055SRussell King sfp->dev = dev; 246773970055SRussell King 246873970055SRussell King mutex_init(&sfp->sm_mutex); 24692158e856SRobert Hancock mutex_init(&sfp->st_mutex); 247073970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 247173970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 247273970055SRussell King 2473139d3a21SRussell King sfp_hwmon_init(sfp); 2474139d3a21SRussell King 247573970055SRussell King return sfp; 247673970055SRussell King } 247773970055SRussell King 247873970055SRussell King static void sfp_cleanup(void *data) 247973970055SRussell King { 248073970055SRussell King struct sfp *sfp = data; 248173970055SRussell King 2482139d3a21SRussell King sfp_hwmon_exit(sfp); 2483139d3a21SRussell King 248473970055SRussell King cancel_delayed_work_sync(&sfp->poll); 248573970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 248673970055SRussell King if (sfp->i2c_mii) { 248773970055SRussell King mdiobus_unregister(sfp->i2c_mii); 248873970055SRussell King mdiobus_free(sfp->i2c_mii); 248973970055SRussell King } 249073970055SRussell King if (sfp->i2c) 249173970055SRussell King i2c_put_adapter(sfp->i2c); 249273970055SRussell King kfree(sfp); 249373970055SRussell King } 249473970055SRussell King 249573970055SRussell King static int sfp_probe(struct platform_device *pdev) 249673970055SRussell King { 2497259c8618SRussell King const struct sff_data *sff; 24987ce236faSRuslan Babayev struct i2c_adapter *i2c; 24995411ca71SChris Healy char *sfp_irq_name; 250073970055SRussell King struct sfp *sfp; 2501257c2559SRobert Hancock int err, i; 250273970055SRussell King 250373970055SRussell King sfp = sfp_alloc(&pdev->dev); 250473970055SRussell King if (IS_ERR(sfp)) 250573970055SRussell King return PTR_ERR(sfp); 250673970055SRussell King 250773970055SRussell King platform_set_drvdata(pdev, sfp); 250873970055SRussell King 250973970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 251073970055SRussell King if (err < 0) 251173970055SRussell King return err; 251273970055SRussell King 2513259c8618SRussell King sff = sfp->type = &sfp_data; 2514259c8618SRussell King 251573970055SRussell King if (pdev->dev.of_node) { 251673970055SRussell King struct device_node *node = pdev->dev.of_node; 2517259c8618SRussell King const struct of_device_id *id; 251873970055SRussell King struct device_node *np; 251973970055SRussell King 2520259c8618SRussell King id = of_match_node(sfp_of_match, node); 2521259c8618SRussell King if (WARN_ON(!id)) 2522259c8618SRussell King return -EINVAL; 2523259c8618SRussell King 2524259c8618SRussell King sff = sfp->type = id->data; 2525259c8618SRussell King 252673970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 252766ede1f9SAntoine Tenart if (!np) { 252866ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 252966ede1f9SAntoine Tenart return -ENODEV; 253066ede1f9SAntoine Tenart } 253173970055SRussell King 253273970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 253373970055SRussell King of_node_put(np); 25347ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 25357ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 25367ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 25377ce236faSRuslan Babayev struct fwnode_reference_args args; 25387ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 25397ce236faSRuslan Babayev int ret; 25407ce236faSRuslan Babayev 25417ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 25421086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 25437ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 25447ce236faSRuslan Babayev return -ENODEV; 25457ce236faSRuslan Babayev } 25467ce236faSRuslan Babayev 25477ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 25487ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 25497ce236faSRuslan Babayev } else { 25507ce236faSRuslan Babayev return -EINVAL; 25517ce236faSRuslan Babayev } 25527ce236faSRuslan Babayev 255373970055SRussell King if (!i2c) 255473970055SRussell King return -EPROBE_DEFER; 255573970055SRussell King 255673970055SRussell King err = sfp_i2c_configure(sfp, i2c); 255773970055SRussell King if (err < 0) { 255873970055SRussell King i2c_put_adapter(i2c); 255973970055SRussell King return err; 256073970055SRussell King } 256173970055SRussell King 2562259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2563259c8618SRussell King if (sff->gpios & BIT(i)) { 256473970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 256573970055SRussell King gpio_of_names[i], gpio_flags[i]); 256673970055SRussell King if (IS_ERR(sfp->gpio[i])) 256773970055SRussell King return PTR_ERR(sfp->gpio[i]); 256873970055SRussell King } 256973970055SRussell King 257073970055SRussell King sfp->get_state = sfp_gpio_get_state; 257173970055SRussell King sfp->set_state = sfp_gpio_set_state; 2572259c8618SRussell King 2573259c8618SRussell King /* Modules that have no detect signal are always present */ 2574259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2575259c8618SRussell King sfp->get_state = sff_gpio_get_state; 257673970055SRussell King 25773bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 25783bb35261SJon Nettleton &sfp->max_power_mW); 25793bb35261SJon Nettleton if (!sfp->max_power_mW) 25803bb35261SJon Nettleton sfp->max_power_mW = 1000; 25813bb35261SJon Nettleton 25823bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 25833bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 25843bb35261SJon Nettleton 258573970055SRussell King /* Get the initial state, and always signal TX disable, 258673970055SRussell King * since the network interface will not be up. 258773970055SRussell King */ 258873970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 258973970055SRussell King 259073970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 259173970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 259273970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 259373970055SRussell King sfp_set_state(sfp, sfp->state); 259473970055SRussell King sfp_module_tx_disable(sfp); 259573f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 259673f5e847SRussell King rtnl_lock(); 259773f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 259873f5e847SRussell King rtnl_unlock(); 259973f5e847SRussell King } 260073970055SRussell King 260173970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 260273970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 260373970055SRussell King continue; 260473970055SRussell King 2605257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 260696216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 260796216181SYueHaibing sfp->gpio_irq[i] = 0; 2608f3c9a666SRussell King sfp->need_poll = true; 260973970055SRussell King continue; 261073970055SRussell King } 261173970055SRussell King 26125411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 26135411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 26145411ca71SChris Healy gpio_of_names[i]); 26155411ca71SChris Healy 26168cb601f1SChris Healy if (!sfp_irq_name) 26178cb601f1SChris Healy return -ENOMEM; 26188cb601f1SChris Healy 2619257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2620257c2559SRobert Hancock NULL, sfp_irq, 262173970055SRussell King IRQF_ONESHOT | 262273970055SRussell King IRQF_TRIGGER_RISING | 262373970055SRussell King IRQF_TRIGGER_FALLING, 26245411ca71SChris Healy sfp_irq_name, sfp); 2625257c2559SRobert Hancock if (err) { 2626257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2627f3c9a666SRussell King sfp->need_poll = true; 262873970055SRussell King } 2629257c2559SRobert Hancock } 263073970055SRussell King 2631f3c9a666SRussell King if (sfp->need_poll) 263273970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 263373970055SRussell King 2634a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2635a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2636a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2637a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2638a1f5d1f0SAntoine Tenart */ 2639a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2640a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2641a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2642a1f5d1f0SAntoine Tenart 2643b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2644b5bfc21aSRussell King if (!sfp->sfp_bus) 2645b5bfc21aSRussell King return -ENOMEM; 2646b5bfc21aSRussell King 26479cc8976cSRussell King sfp_debugfs_init(sfp); 26489cc8976cSRussell King 264973970055SRussell King return 0; 265073970055SRussell King } 265173970055SRussell King 265273970055SRussell King static int sfp_remove(struct platform_device *pdev) 265373970055SRussell King { 265473970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 265573970055SRussell King 26569cc8976cSRussell King sfp_debugfs_exit(sfp); 265773970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 265873970055SRussell King 26590cb96b57SRussell King rtnl_lock(); 26600cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 26610cb96b57SRussell King rtnl_unlock(); 26620cb96b57SRussell King 266373970055SRussell King return 0; 266473970055SRussell King } 266573970055SRussell King 2666257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2667257c2559SRobert Hancock { 2668257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2669257c2559SRobert Hancock int i; 2670257c2559SRobert Hancock 2671257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2672257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2673257c2559SRobert Hancock continue; 2674257c2559SRobert Hancock 2675257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2676257c2559SRobert Hancock } 2677257c2559SRobert Hancock 2678257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2679257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2680257c2559SRobert Hancock } 2681257c2559SRobert Hancock 268273970055SRussell King static struct platform_driver sfp_driver = { 268373970055SRussell King .probe = sfp_probe, 268473970055SRussell King .remove = sfp_remove, 2685257c2559SRobert Hancock .shutdown = sfp_shutdown, 268673970055SRussell King .driver = { 268773970055SRussell King .name = "sfp", 268873970055SRussell King .of_match_table = sfp_of_match, 268973970055SRussell King }, 269073970055SRussell King }; 269173970055SRussell King 269273970055SRussell King static int sfp_init(void) 269373970055SRussell King { 269473970055SRussell King poll_jiffies = msecs_to_jiffies(100); 269573970055SRussell King 269673970055SRussell King return platform_driver_register(&sfp_driver); 269773970055SRussell King } 269873970055SRussell King module_init(sfp_init); 269973970055SRussell King 270073970055SRussell King static void sfp_exit(void) 270173970055SRussell King { 270273970055SRussell King platform_driver_unregister(&sfp_driver); 270373970055SRussell King } 270473970055SRussell King module_exit(sfp_exit); 270573970055SRussell King 270673970055SRussell King MODULE_ALIAS("platform:sfp"); 270773970055SRussell King MODULE_AUTHOR("Russell King"); 270873970055SRussell King MODULE_LICENSE("GPL v2"); 2709