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", 1374005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_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, 4740dea4d03SRussell King "failed to read SFP soft status: %d\n", 4750dea4d03SRussell King 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 { 1314139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1315139d3a21SRussell King } 1316139d3a21SRussell King return; 1317139d3a21SRussell King } 1318139d3a21SRussell King 1319139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1320139d3a21SRussell King if (!sfp->hwmon_name) { 1321139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1322139d3a21SRussell King return; 1323139d3a21SRussell King } 1324139d3a21SRussell King 1325139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1326139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1327139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1328139d3a21SRussell King 1329139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1330139d3a21SRussell King sfp->hwmon_name, sfp, 1331139d3a21SRussell King &sfp_hwmon_chip_info, 1332139d3a21SRussell King NULL); 1333139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1334139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1335139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1336139d3a21SRussell King } 1337139d3a21SRussell King 1338139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1339139d3a21SRussell King { 13401323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 13411323061aSAndrew Lunn return 0; 13421323061aSAndrew Lunn 13431323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 13441323061aSAndrew Lunn return 0; 13451323061aSAndrew Lunn 13461323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 13471323061aSAndrew Lunn /* This driver in general does not support address 13481323061aSAndrew Lunn * change. 13491323061aSAndrew Lunn */ 13501323061aSAndrew Lunn return 0; 13511323061aSAndrew Lunn 1352139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1353139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 13541323061aSAndrew Lunn 1355139d3a21SRussell King return 0; 13561323061aSAndrew Lunn } 13571323061aSAndrew Lunn 13581323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13591323061aSAndrew Lunn { 1360139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13613e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13621323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13633e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13641323061aSAndrew Lunn kfree(sfp->hwmon_name); 13651323061aSAndrew Lunn } 13663e322474SAndrew Lunn } 1367139d3a21SRussell King 1368139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1369139d3a21SRussell King { 1370139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1371139d3a21SRussell King 1372139d3a21SRussell King return 0; 1373139d3a21SRussell King } 1374139d3a21SRussell King 1375139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1376139d3a21SRussell King { 1377139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1378139d3a21SRussell King } 13791323061aSAndrew Lunn #else 13801323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13811323061aSAndrew Lunn { 13821323061aSAndrew Lunn return 0; 13831323061aSAndrew Lunn } 13841323061aSAndrew Lunn 13851323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13861323061aSAndrew Lunn { 13871323061aSAndrew Lunn } 1388139d3a21SRussell King 1389139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1390139d3a21SRussell King { 1391139d3a21SRussell King return 0; 1392139d3a21SRussell King } 1393139d3a21SRussell King 1394139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1395139d3a21SRussell King { 1396139d3a21SRussell King } 13971323061aSAndrew Lunn #endif 13981323061aSAndrew Lunn 139973970055SRussell King /* Helpers */ 140073970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 140173970055SRussell King { 140273970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 140373970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 140473970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 140573970055SRussell King sfp_set_state(sfp, sfp->state); 140673970055SRussell King } 140773970055SRussell King 140873970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 140973970055SRussell King { 141073970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 141173970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 141273970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 141373970055SRussell King sfp_set_state(sfp, sfp->state); 141473970055SRussell King } 141573970055SRussell King 14169cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 14179cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 14189cc8976cSRussell King { 14199cc8976cSRussell King struct sfp *sfp = s->private; 14209cc8976cSRussell King 14219cc8976cSRussell King seq_printf(s, "Module state: %s\n", 14229cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 14239cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 14249cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 14259cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 14269cc8976cSRussell King seq_printf(s, "Device state: %s\n", 14279cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 14289cc8976cSRussell King seq_printf(s, "Main state: %s\n", 14299cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 14309cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 14319cc8976cSRussell King sfp->sm_fault_retries); 14329cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 14339cc8976cSRussell King sfp->sm_phy_retries); 14349cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 14359cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 14369cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 14379cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 14389cc8976cSRussell King return 0; 14399cc8976cSRussell King } 14409cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 14419cc8976cSRussell King 14429cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14439cc8976cSRussell King { 14449cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 14459cc8976cSRussell King 14469cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 14479cc8976cSRussell King &sfp_debug_state_fops); 14489cc8976cSRussell King } 14499cc8976cSRussell King 14509cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14519cc8976cSRussell King { 14529cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 14539cc8976cSRussell King } 14549cc8976cSRussell King #else 14559cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14569cc8976cSRussell King { 14579cc8976cSRussell King } 14589cc8976cSRussell King 14599cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14609cc8976cSRussell King { 14619cc8976cSRussell King } 14629cc8976cSRussell King #endif 14639cc8976cSRussell King 146473970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 146573970055SRussell King { 146673970055SRussell King unsigned int state = sfp->state; 146773970055SRussell King 146873970055SRussell King if (state & SFP_F_TX_DISABLE) 146973970055SRussell King return; 147073970055SRussell King 147173970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 147273970055SRussell King 147373970055SRussell King udelay(T_RESET_US); 147473970055SRussell King 147573970055SRussell King sfp_set_state(sfp, state); 147673970055SRussell King } 147773970055SRussell King 147873970055SRussell King /* SFP state machine */ 147973970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 148073970055SRussell King { 148173970055SRussell King if (timeout) 148273970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 148373970055SRussell King timeout); 148473970055SRussell King else 148573970055SRussell King cancel_delayed_work(&sfp->timeout); 148673970055SRussell King } 148773970055SRussell King 148873970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 148973970055SRussell King unsigned int timeout) 149073970055SRussell King { 149173970055SRussell King sfp->sm_state = state; 149273970055SRussell King sfp_sm_set_timer(sfp, timeout); 149373970055SRussell King } 149473970055SRussell King 14950936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1496516b29edSFlorian Fainelli unsigned int timeout) 149773970055SRussell King { 149873970055SRussell King sfp->sm_mod_state = state; 149973970055SRussell King sfp_sm_set_timer(sfp, timeout); 150073970055SRussell King } 150173970055SRussell King 150273970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 150373970055SRussell King { 150473970055SRussell King sfp_remove_phy(sfp->sfp_bus); 150573970055SRussell King phy_device_remove(sfp->mod_phy); 150673970055SRussell King phy_device_free(sfp->mod_phy); 150773970055SRussell King sfp->mod_phy = NULL; 150873970055SRussell King } 150973970055SRussell King 1510256e43cbSRussell King static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) 151173970055SRussell King { 151273970055SRussell King struct phy_device *phy; 151373970055SRussell King int err; 151473970055SRussell King 15159a484621SRussell King phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); 15161cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 15171cb89a14SRussell King return PTR_ERR(phy); 151820b56ed9SRussell King if (IS_ERR(phy)) { 151920b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 1520256e43cbSRussell King return PTR_ERR(phy); 152173970055SRussell King } 152273970055SRussell King 15239a484621SRussell King err = phy_device_register(phy); 15249a484621SRussell King if (err) { 15259a484621SRussell King phy_device_free(phy); 15269a484621SRussell King dev_err(sfp->dev, "phy_device_register failed: %d\n", err); 1527256e43cbSRussell King return err; 15289a484621SRussell King } 15299a484621SRussell King 153073970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 153173970055SRussell King if (err) { 153273970055SRussell King phy_device_remove(phy); 153373970055SRussell King phy_device_free(phy); 153473970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 1535256e43cbSRussell King return err; 153673970055SRussell King } 153773970055SRussell King 153873970055SRussell King sfp->mod_phy = phy; 1539256e43cbSRussell King 1540256e43cbSRussell King return 0; 154173970055SRussell King } 154273970055SRussell King 154373970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 154473970055SRussell King { 154573970055SRussell King sfp_link_up(sfp->sfp_bus); 154673970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 154773970055SRussell King } 154873970055SRussell King 154973970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 155073970055SRussell King { 155173970055SRussell King sfp_link_down(sfp->sfp_bus); 155273970055SRussell King } 155373970055SRussell King 155473970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 155573970055SRussell King { 1556624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1557624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1558624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1559624407d2SRussell King bool los = false; 156073970055SRussell King 1561710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1562624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1563624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 156473970055SRussell King */ 1565624407d2SRussell King if (los_options == los_inverted) 1566624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1567624407d2SRussell King else if (los_options == los_normal) 1568624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 156973970055SRussell King 157073970055SRussell King if (los) 157173970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 157273970055SRussell King else 157373970055SRussell King sfp_sm_link_up(sfp); 157473970055SRussell King } 157573970055SRussell King 1576710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1577710dfbb0SRussell King { 1578624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1579624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1580624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1581624407d2SRussell King 1582624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1583624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1584710dfbb0SRussell King } 1585710dfbb0SRussell King 1586710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1587710dfbb0SRussell King { 1588624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1589624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1590624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1591624407d2SRussell King 1592624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1593624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1594710dfbb0SRussell King } 1595710dfbb0SRussell King 159663ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 159773970055SRussell King { 1598281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1599516b29edSFlorian Fainelli dev_err(sfp->dev, 1600516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 160173970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 160273970055SRussell King } else { 160373970055SRussell King if (warn) 160473970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 160573970055SRussell King 160663ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 160773970055SRussell King } 160873970055SRussell King } 160973970055SRussell King 16109a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 16119a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 16129a484621SRussell King * or clause 45 PHY. 16139a484621SRussell King * 16149a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 16159a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 16169a484621SRussell King * PHY driver to determine. 16179a484621SRussell King * 16189a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 16199a484621SRussell King * mode according to the negotiated line speed. 16209a484621SRussell King */ 1621256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1622181f29daSRussell King { 1623256e43cbSRussell King int err = 0; 1624256e43cbSRussell King 16259a484621SRussell King switch (sfp->id.base.extended_cc) { 16269a484621SRussell King case SFF8024_ECC_10GBASE_T_SFI: 16279a484621SRussell King case SFF8024_ECC_10GBASE_T_SR: 16289a484621SRussell King case SFF8024_ECC_5GBASE_T: 16299a484621SRussell King case SFF8024_ECC_2_5GBASE_T: 1630256e43cbSRussell King err = sfp_sm_probe_phy(sfp, true); 16319a484621SRussell King break; 16329a484621SRussell King 16339a484621SRussell King default: 1634fa2de660SRussell King if (sfp->id.base.e1000_base_t) 1635256e43cbSRussell King err = sfp_sm_probe_phy(sfp, false); 16369a484621SRussell King break; 16379a484621SRussell King } 1638256e43cbSRussell King return err; 163973970055SRussell King } 164073970055SRussell King 1641ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 16423bb35261SJon Nettleton { 1643ed32abb1SRussell King u32 power_mW = 1000; 16443bb35261SJon Nettleton 16453bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1646ed32abb1SRussell King power_mW = 1500; 16473bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1648ed32abb1SRussell King power_mW = 2000; 16493bb35261SJon Nettleton 1650ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 16517cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 16527cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 16537cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 16547cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 16557cfa9c92SRussell King /* The module appears not to implement bus address 16567cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 16577cfa9c92SRussell King * indicated mode. 16587cfa9c92SRussell King */ 16593bb35261SJon Nettleton dev_err(sfp->dev, 16603bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1661ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16623bb35261SJon Nettleton return -EINVAL; 16637cfa9c92SRussell King } else { 16643bb35261SJon Nettleton dev_warn(sfp->dev, 16653bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1666ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16673bb35261SJon Nettleton return 0; 16683bb35261SJon Nettleton } 16697cfa9c92SRussell King } 16707cfa9c92SRussell King 16717cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 16727cfa9c92SRussell King * an address change sequence, warn the user that the module may 16737cfa9c92SRussell King * not be functional. 16747cfa9c92SRussell King */ 16757cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 16767cfa9c92SRussell King dev_warn(sfp->dev, 167707f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 16787cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 16797cfa9c92SRussell King return 0; 16807cfa9c92SRussell King } 16813bb35261SJon Nettleton 1682ed32abb1SRussell King sfp->module_power_mW = power_mW; 1683ed32abb1SRussell King 1684ed32abb1SRussell King return 0; 1685ed32abb1SRussell King } 1686ed32abb1SRussell King 1687b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1688ed32abb1SRussell King { 1689ed32abb1SRussell King u8 val; 1690ed32abb1SRussell King int err; 1691ed32abb1SRussell King 16923bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16933bb35261SJon Nettleton if (err != sizeof(val)) { 16943bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 1695b036a554SRussell King return -EAGAIN; 16963bb35261SJon Nettleton } 16973bb35261SJon Nettleton 16989a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 16999a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 17009a484621SRussell King * if the bit is already set, we're already in high power mode. 17019a484621SRussell King */ 17029a484621SRussell King if (!!(val & BIT(0)) == enable) 17039a484621SRussell King return 0; 17049a484621SRussell King 1705b036a554SRussell King if (enable) 17063bb35261SJon Nettleton val |= BIT(0); 1707b036a554SRussell King else 1708b036a554SRussell King val &= ~BIT(0); 17093bb35261SJon Nettleton 17103bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 17113bb35261SJon Nettleton if (err != sizeof(val)) { 17123bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 1713b036a554SRussell King return -EAGAIN; 17143bb35261SJon Nettleton } 17153bb35261SJon Nettleton 1716b036a554SRussell King if (enable) 17173bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1718ed32abb1SRussell King sfp->module_power_mW / 1000, 1719ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 17203bb35261SJon Nettleton 1721b036a554SRussell King return 0; 17223bb35261SJon Nettleton } 17233bb35261SJon Nettleton 1724426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1725426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1726426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1727426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1728426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1729426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1730426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1731426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1732426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1733426c6cbcSPali Rohár * at a time. 17340d035bedSRussell King */ 1735426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 17360d035bedSRussell King { 1737426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 17380d035bedSRussell King 1739426c6cbcSPali Rohár /* Already using byte IO */ 1740426c6cbcSPali Rohár if (block_size == 1) 1741426c6cbcSPali Rohár return false; 1742426c6cbcSPali Rohár 1743426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1744426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1745426c6cbcSPali Rohár return false; 17460d035bedSRussell King } 1747426c6cbcSPali Rohár return true; 17480d035bedSRussell King } 17490d035bedSRussell King 1750b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1751b18432c5SChris Healy { 1752b18432c5SChris Healy u8 check; 1753b18432c5SChris Healy int err; 1754b18432c5SChris Healy 1755b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1756b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1757b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1758b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1759b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1760b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1761b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1762b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1763b18432c5SChris Healy if (err != 3) { 1764b18432c5SChris Healy dev_err(sfp->dev, "Failed to rewrite module EEPROM: %d\n", err); 1765b18432c5SChris Healy return err; 1766b18432c5SChris Healy } 1767b18432c5SChris Healy 1768b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1769b18432c5SChris Healy mdelay(50); 1770b18432c5SChris Healy 1771b18432c5SChris Healy /* Update base structure checksum */ 1772b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1773b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1774b18432c5SChris Healy if (err != 1) { 1775b18432c5SChris Healy dev_err(sfp->dev, "Failed to update base structure checksum in fiber module EEPROM: %d\n", err); 1776b18432c5SChris Healy return err; 1777b18432c5SChris Healy } 1778b18432c5SChris Healy } 1779b18432c5SChris Healy return 0; 1780b18432c5SChris Healy } 1781b18432c5SChris Healy 1782e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 178373970055SRussell King { 178473970055SRussell King /* SFP module inserted - read I2C data */ 178573970055SRussell King struct sfp_eeprom_id id; 1786b18432c5SChris Healy bool cotsworks_sfbg; 1787981f1f80SRussell King bool cotsworks; 178873970055SRussell King u8 check; 17893bb35261SJon Nettleton int ret; 179073970055SRussell King 1791426c6cbcSPali Rohár /* Some SFP modules and also some Linux I2C drivers do not like reads 1792426c6cbcSPali Rohár * longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at 1793426c6cbcSPali Rohár * a time. 17940d035bedSRussell King */ 1795426c6cbcSPali Rohár sfp->i2c_block_size = 16; 17960d035bedSRussell King 17970d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 17983bb35261SJon Nettleton if (ret < 0) { 1799e117be74SRussell King if (report) 18003bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 180173970055SRussell King return -EAGAIN; 180273970055SRussell King } 180373970055SRussell King 18040d035bedSRussell King if (ret != sizeof(id.base)) { 18053bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 180673970055SRussell King return -EAGAIN; 180773970055SRussell King } 180873970055SRussell King 1809426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1810426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1811426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1812426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1813426c6cbcSPali Rohár * is really required and we have no other option. 1814426c6cbcSPali Rohár */ 1815426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1816426c6cbcSPali Rohár dev_info(sfp->dev, 1817426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1818426c6cbcSPali Rohár dev_info(sfp->dev, 1819426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1820426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1821426c6cbcSPali Rohár 1822426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1823426c6cbcSPali Rohár if (ret < 0) { 1824426c6cbcSPali Rohár if (report) 1825426c6cbcSPali Rohár dev_err(sfp->dev, "failed to read EEPROM: %d\n", 1826426c6cbcSPali Rohár ret); 1827426c6cbcSPali Rohár return -EAGAIN; 1828426c6cbcSPali Rohár } 1829426c6cbcSPali Rohár 1830426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 1831426c6cbcSPali Rohár dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 1832426c6cbcSPali Rohár return -EAGAIN; 1833426c6cbcSPali Rohár } 1834426c6cbcSPali Rohár } 1835426c6cbcSPali Rohár 1836981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1837981f1f80SRussell King * do the final programming with the final module part number, 1838981f1f80SRussell King * serial number and date code. 1839981f1f80SRussell King */ 1840981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1841b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1842b18432c5SChris Healy 1843b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1844b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1845b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1846b18432c5SChris Healy */ 1847b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1848b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1849b18432c5SChris Healy if (ret < 0) 1850b18432c5SChris Healy return ret; 1851b18432c5SChris Healy } 1852981f1f80SRussell King 185373970055SRussell King /* Validate the checksum over the base structure */ 185473970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 185573970055SRussell King if (check != id.base.cc_base) { 1856981f1f80SRussell King if (cotsworks) { 1857981f1f80SRussell King dev_warn(sfp->dev, 1858981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1859981f1f80SRussell King check, id.base.cc_base); 1860981f1f80SRussell King } else { 186173970055SRussell King dev_err(sfp->dev, 1862981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1863981f1f80SRussell King check, id.base.cc_base); 186473970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1865981f1f80SRussell King 16, 1, &id, sizeof(id), true); 186673970055SRussell King return -EINVAL; 186773970055SRussell King } 1868981f1f80SRussell King } 186973970055SRussell King 18700d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 18710d035bedSRussell King if (ret < 0) { 18720d035bedSRussell King if (report) 18730d035bedSRussell King dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 18740d035bedSRussell King return -EAGAIN; 18750d035bedSRussell King } 18760d035bedSRussell King 18770d035bedSRussell King if (ret != sizeof(id.ext)) { 18780d035bedSRussell King dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 18790d035bedSRussell King return -EAGAIN; 18800d035bedSRussell King } 18810d035bedSRussell King 188273970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 188373970055SRussell King if (check != id.ext.cc_ext) { 1884981f1f80SRussell King if (cotsworks) { 1885981f1f80SRussell King dev_warn(sfp->dev, 1886981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1887981f1f80SRussell King check, id.ext.cc_ext); 1888981f1f80SRussell King } else { 188973970055SRussell King dev_err(sfp->dev, 1890981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1891981f1f80SRussell King check, id.ext.cc_ext); 1892981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1893981f1f80SRussell King 16, 1, &id, sizeof(id), true); 189473970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 189573970055SRussell King } 1896981f1f80SRussell King } 189773970055SRussell King 189873970055SRussell King sfp->id = id; 189973970055SRussell King 1900a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1901a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1902a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1903a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1904a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1905a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 190673970055SRussell King 1907259c8618SRussell King /* Check whether we support this module */ 1908f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1909259c8618SRussell King dev_err(sfp->dev, 1910259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 191173970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 191273970055SRussell King return -EINVAL; 191373970055SRussell King } 191473970055SRussell King 1915ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1916ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1917ec7681bdSRussell King dev_warn(sfp->dev, 1918ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1919ec7681bdSRussell King 1920ed32abb1SRussell King /* Parse the module power requirement */ 1921ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1922ed32abb1SRussell King if (ret < 0) 1923ed32abb1SRussell King return ret; 1924ed32abb1SRussell King 192526c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 192626c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 192726c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 192826c97a2dSRussell King else 192926c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 193026c97a2dSRussell King 1931b036a554SRussell King return 0; 193273970055SRussell King } 193373970055SRussell King 193473970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 193573970055SRussell King { 193673f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 193773970055SRussell King sfp_module_remove(sfp->sfp_bus); 193873970055SRussell King 19391323061aSAndrew Lunn sfp_hwmon_remove(sfp); 19401323061aSAndrew Lunn 194173970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1942ed32abb1SRussell King sfp->module_power_mW = 0; 194373970055SRussell King 194473970055SRussell King dev_info(sfp->dev, "module removed\n"); 194573970055SRussell King } 194673970055SRussell King 19476b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1948e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 194973970055SRussell King { 1950e85d81a1SRussell King switch (sfp->sm_dev_state) { 1951e85d81a1SRussell King default: 19526b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 19536b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 19546b0da5c9SRussell King break; 19556b0da5c9SRussell King 19566b0da5c9SRussell King case SFP_DEV_DOWN: 19576b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 19586b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 19596b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1960e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1961e85d81a1SRussell King break; 196273970055SRussell King 1963e85d81a1SRussell King case SFP_DEV_UP: 19646b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 19656b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 19666b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1967e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1968e85d81a1SRussell King break; 1969e85d81a1SRussell King } 1970e85d81a1SRussell King } 197173970055SRussell King 1972d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1973d900954fSRussell King * the on-board EEPROM, and sets up the power level. 197473970055SRussell King */ 1975e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1976e85d81a1SRussell King { 1977b036a554SRussell King int err; 1978b036a554SRussell King 1979b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1980b036a554SRussell King if (event == SFP_E_REMOVE) { 1981d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1982d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1983b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1984b036a554SRussell King return; 1985b036a554SRussell King } 1986b036a554SRussell King 1987b036a554SRussell King /* Handle device detach globally */ 198873f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 198973f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1990b036a554SRussell King if (sfp->module_power_mW > 1000 && 1991b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1992b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 199373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1994d2e816c0SRussell King return; 1995d2e816c0SRussell King } 1996d2e816c0SRussell King 199773970055SRussell King switch (sfp->sm_mod_state) { 199873970055SRussell King default: 1999e117be74SRussell King if (event == SFP_E_INSERT) { 2000d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 2001e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2002e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2003e117be74SRussell King } 200473970055SRussell King break; 200573970055SRussell King 200673970055SRussell King case SFP_MOD_PROBE: 200773f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2008b036a554SRussell King if (event != SFP_E_TIMEOUT) 2009b036a554SRussell King break; 201073970055SRussell King 2011e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2012b036a554SRussell King if (err == -EAGAIN) { 2013e117be74SRussell King if (sfp->sm_mod_tries_init && 2014e117be74SRussell King --sfp->sm_mod_tries_init) { 2015e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2016b036a554SRussell King break; 2017e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2018e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2019e117be74SRussell King dev_warn(sfp->dev, 2020e117be74SRussell King "please wait, module slow to respond\n"); 2021e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2022e117be74SRussell King break; 2023e117be74SRussell King } 2024b036a554SRussell King } 2025b036a554SRussell King if (err < 0) { 2026b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2027b036a554SRussell King break; 2028b036a554SRussell King } 2029b036a554SRussell King 203038ecd706SRussell King err = sfp_hwmon_insert(sfp); 203138ecd706SRussell King if (err) 203238ecd706SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 203338ecd706SRussell King 203473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2035df561f66SGustavo A. R. Silva fallthrough; 203673f5e847SRussell King case SFP_MOD_WAITDEV: 203773f5e847SRussell King /* Ensure that the device is attached before proceeding */ 203873f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 203973f5e847SRussell King break; 204073f5e847SRussell King 204173f5e847SRussell King /* Report the module insertion to the upstream device */ 204273f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 204373f5e847SRussell King if (err < 0) { 204473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 204573f5e847SRussell King break; 204673f5e847SRussell King } 204773f5e847SRussell King 2048b036a554SRussell King /* If this is a power level 1 module, we are done */ 2049b036a554SRussell King if (sfp->module_power_mW <= 1000) 2050b036a554SRussell King goto insert; 2051b036a554SRussell King 2052b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2053df561f66SGustavo A. R. Silva fallthrough; 2054b036a554SRussell King case SFP_MOD_HPOWER: 2055b036a554SRussell King /* Enable high power mode */ 2056b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 205773f5e847SRussell King if (err < 0) { 205873f5e847SRussell King if (err != -EAGAIN) { 205973f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 20600936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 206173f5e847SRussell King } else { 2062e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 206373f5e847SRussell King } 206473f5e847SRussell King break; 206573f5e847SRussell King } 206673f5e847SRussell King 206773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 206873970055SRussell King break; 206973970055SRussell King 2070b036a554SRussell King case SFP_MOD_WAITPWR: 2071b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2072b036a554SRussell King if (event != SFP_E_TIMEOUT) 2073b036a554SRussell King break; 2074b036a554SRussell King 2075b036a554SRussell King insert: 20760936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 20773bb35261SJon Nettleton break; 2078b036a554SRussell King 207973970055SRussell King case SFP_MOD_PRESENT: 208073970055SRussell King case SFP_MOD_ERROR: 208173970055SRussell King break; 208273970055SRussell King } 208373970055SRussell King } 208473970055SRussell King 2085e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2086e85d81a1SRussell King { 2087eefa6f1fSRussell King unsigned long timeout; 20881cb89a14SRussell King int ret; 2089eefa6f1fSRussell King 209073970055SRussell King /* Some events are global */ 209173970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 209273970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 209373970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 209473970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 209573970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 209673970055SRussell King sfp_sm_link_down(sfp); 209774c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 209874c551caSRussell King sfp_module_stop(sfp->sfp_bus); 209973970055SRussell King if (sfp->mod_phy) 210073970055SRussell King sfp_sm_phy_detach(sfp); 21011539e0d3SRussell King sfp_module_tx_disable(sfp); 2102f3c9a666SRussell King sfp_soft_stop_poll(sfp); 210373970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 210473970055SRussell King return; 210573970055SRussell King } 210673970055SRussell King 210773970055SRussell King /* The main state machine */ 210873970055SRussell King switch (sfp->sm_state) { 210973970055SRussell King case SFP_S_DOWN: 2110eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2111eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2112eefa6f1fSRussell King break; 2113eefa6f1fSRussell King 2114f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2115f3c9a666SRussell King sfp_soft_start_poll(sfp); 2116f3c9a666SRussell King 2117f3c9a666SRussell King sfp_module_tx_enable(sfp); 2118eefa6f1fSRussell King 2119eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2120281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2121eefa6f1fSRussell King 2122eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2123eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2124eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 2125eefa6f1fSRussell King */ 2126eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 2127eefa6f1fSRussell King break; 2128eefa6f1fSRussell King 2129eefa6f1fSRussell King case SFP_S_WAIT: 2130eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2131eefa6f1fSRussell King break; 2132eefa6f1fSRussell King 2133eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 213426c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 213526c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 213626c97a2dSRussell King * initialise, which is indicated by TX_FAULT 213726c97a2dSRussell King * deasserting. 2138181f29daSRussell King */ 213926c97a2dSRussell King timeout = sfp->module_t_start_up; 2140eefa6f1fSRussell King if (timeout > T_WAIT) 2141eefa6f1fSRussell King timeout -= T_WAIT; 2142eefa6f1fSRussell King else 2143eefa6f1fSRussell King timeout = 1; 2144eefa6f1fSRussell King 2145eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2146eefa6f1fSRussell King } else { 2147eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2148eefa6f1fSRussell King * finished initialising. 2149eefa6f1fSRussell King */ 2150eefa6f1fSRussell King goto init_done; 2151181f29daSRussell King } 215273970055SRussell King break; 215373970055SRussell King 215473970055SRussell King case SFP_S_INIT: 2155d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2156*e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 215726c97a2dSRussell King * or t_start_up, so assume there is a fault. 2158d23751a0SRussell King */ 2159d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2160281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2161d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 21621cb89a14SRussell King init_done: 21631cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 21641cb89a14SRussell King goto phy_probe; 21651cb89a14SRussell King } 21661cb89a14SRussell King break; 21671cb89a14SRussell King 21681cb89a14SRussell King case SFP_S_INIT_PHY: 21691cb89a14SRussell King if (event != SFP_E_TIMEOUT) 21701cb89a14SRussell King break; 21711cb89a14SRussell King phy_probe: 21721cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2173d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2174d23751a0SRussell King */ 21751cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 21761cb89a14SRussell King if (ret == -ENODEV) { 21771cb89a14SRussell King if (--sfp->sm_phy_retries) { 21781cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 21791cb89a14SRussell King break; 21801cb89a14SRussell King } else { 21811cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 21821cb89a14SRussell King } 21831cb89a14SRussell King } else if (ret) { 2184256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2185256e43cbSRussell King break; 2186256e43cbSRussell King } 218774c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 218874c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 218974c551caSRussell King break; 219074c551caSRussell King } 2191d23751a0SRussell King sfp_sm_link_check_los(sfp); 2192d23751a0SRussell King 2193d23751a0SRussell King /* Reset the fault retry count */ 2194281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2195d23751a0SRussell King break; 2196d23751a0SRussell King 2197d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2198d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2199d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 220026c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2201d23751a0SRussell King } 220273970055SRussell King break; 220373970055SRussell King 220473970055SRussell King case SFP_S_WAIT_LOS: 220573970055SRussell King if (event == SFP_E_TX_FAULT) 220663ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2207710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 220873970055SRussell King sfp_sm_link_up(sfp); 220973970055SRussell King break; 221073970055SRussell King 221173970055SRussell King case SFP_S_LINK_UP: 221273970055SRussell King if (event == SFP_E_TX_FAULT) { 221373970055SRussell King sfp_sm_link_down(sfp); 221463ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2215710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 221673970055SRussell King sfp_sm_link_down(sfp); 221773970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 221873970055SRussell King } 221973970055SRussell King break; 222073970055SRussell King 222173970055SRussell King case SFP_S_TX_FAULT: 222273970055SRussell King if (event == SFP_E_TIMEOUT) { 222373970055SRussell King sfp_module_tx_fault_reset(sfp); 222426c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 222573970055SRussell King } 222673970055SRussell King break; 222773970055SRussell King 222873970055SRussell King case SFP_S_REINIT: 222973970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 223063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 223173970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 223273970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 223373970055SRussell King sfp_sm_link_check_los(sfp); 223473970055SRussell King } 223573970055SRussell King break; 223673970055SRussell King 223773970055SRussell King case SFP_S_TX_DISABLE: 223873970055SRussell King break; 223973970055SRussell King } 2240e85d81a1SRussell King } 2241e85d81a1SRussell King 2242e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2243e85d81a1SRussell King { 2244e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2245e85d81a1SRussell King 2246e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2247e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2248e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2249e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2250e85d81a1SRussell King event_to_str(event)); 2251e85d81a1SRussell King 2252e85d81a1SRussell King sfp_sm_device(sfp, event); 22536b0da5c9SRussell King sfp_sm_module(sfp, event); 2254e85d81a1SRussell King sfp_sm_main(sfp, event); 225573970055SRussell King 22564005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 22574005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 22584005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 22594005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 226073970055SRussell King 226173970055SRussell King mutex_unlock(&sfp->sm_mutex); 226273970055SRussell King } 226373970055SRussell King 2264b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2265b5bfc21aSRussell King { 22666b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2267b5bfc21aSRussell King } 2268b5bfc21aSRussell King 2269b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2270b5bfc21aSRussell King { 22716b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2272b5bfc21aSRussell King } 2273b5bfc21aSRussell King 227473970055SRussell King static void sfp_start(struct sfp *sfp) 227573970055SRussell King { 227673970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 227773970055SRussell King } 227873970055SRussell King 227973970055SRussell King static void sfp_stop(struct sfp *sfp) 228073970055SRussell King { 228173970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 228273970055SRussell King } 228373970055SRussell King 228473970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 228573970055SRussell King { 228673970055SRussell King /* locking... and check module is present */ 228773970055SRussell King 2288ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2289ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 229073970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 229173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 229273970055SRussell King } else { 229373970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 229473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 229573970055SRussell King } 229673970055SRussell King return 0; 229773970055SRussell King } 229873970055SRussell King 229973970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 230073970055SRussell King u8 *data) 230173970055SRussell King { 230273970055SRussell King unsigned int first, last, len; 230373970055SRussell King int ret; 230473970055SRussell King 230573970055SRussell King if (ee->len == 0) 230673970055SRussell King return -EINVAL; 230773970055SRussell King 230873970055SRussell King first = ee->offset; 230973970055SRussell King last = ee->offset + ee->len; 231073970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 231173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 231273970055SRussell King len -= first; 231373970055SRussell King 23142794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 231573970055SRussell King if (ret < 0) 231673970055SRussell King return ret; 231773970055SRussell King 231873970055SRussell King first += len; 231973970055SRussell King data += len; 232073970055SRussell King } 23212794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 232273970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 232373970055SRussell King len -= first; 232473970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 232573970055SRussell King 23262794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 232773970055SRussell King if (ret < 0) 232873970055SRussell King return ret; 232973970055SRussell King } 233073970055SRussell King return 0; 233173970055SRussell King } 233273970055SRussell King 2333d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2334d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2335d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2336d740513fSAndrew Lunn { 2337d740513fSAndrew Lunn if (page->bank) { 2338d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2339d740513fSAndrew Lunn return -EOPNOTSUPP; 2340d740513fSAndrew Lunn } 2341d740513fSAndrew Lunn 2342d740513fSAndrew Lunn if (page->page) { 2343d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2344d740513fSAndrew Lunn return -EOPNOTSUPP; 2345d740513fSAndrew Lunn } 2346d740513fSAndrew Lunn 2347d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2348d740513fSAndrew Lunn page->i2c_address != 0x51) { 2349d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2350d740513fSAndrew Lunn return -EOPNOTSUPP; 2351d740513fSAndrew Lunn } 2352d740513fSAndrew Lunn 2353d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2354d740513fSAndrew Lunn page->data, page->length); 2355d740513fSAndrew Lunn }; 2356d740513fSAndrew Lunn 235773970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2358b5bfc21aSRussell King .attach = sfp_attach, 2359b5bfc21aSRussell King .detach = sfp_detach, 236073970055SRussell King .start = sfp_start, 236173970055SRussell King .stop = sfp_stop, 236273970055SRussell King .module_info = sfp_module_info, 236373970055SRussell King .module_eeprom = sfp_module_eeprom, 2364d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 236573970055SRussell King }; 236673970055SRussell King 236773970055SRussell King static void sfp_timeout(struct work_struct *work) 236873970055SRussell King { 236973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 237073970055SRussell King 237173970055SRussell King rtnl_lock(); 237273970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 237373970055SRussell King rtnl_unlock(); 237473970055SRussell King } 237573970055SRussell King 237673970055SRussell King static void sfp_check_state(struct sfp *sfp) 237773970055SRussell King { 237873970055SRussell King unsigned int state, i, changed; 237973970055SRussell King 23802158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 238173970055SRussell King state = sfp_get_state(sfp); 238273970055SRussell King changed = state ^ sfp->state; 238373970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 238473970055SRussell King 238573970055SRussell King for (i = 0; i < GPIO_MAX; i++) 238673970055SRussell King if (changed & BIT(i)) 238773970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 238873970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 238973970055SRussell King 239073970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 239173970055SRussell King sfp->state = state; 239273970055SRussell King 239373970055SRussell King rtnl_lock(); 239473970055SRussell King if (changed & SFP_F_PRESENT) 239573970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 239673970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 239773970055SRussell King 239873970055SRussell King if (changed & SFP_F_TX_FAULT) 239973970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 240073970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 240173970055SRussell King 240273970055SRussell King if (changed & SFP_F_LOS) 240373970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 240473970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 240573970055SRussell King rtnl_unlock(); 24062158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 240773970055SRussell King } 240873970055SRussell King 240973970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 241073970055SRussell King { 241173970055SRussell King struct sfp *sfp = data; 241273970055SRussell King 241373970055SRussell King sfp_check_state(sfp); 241473970055SRussell King 241573970055SRussell King return IRQ_HANDLED; 241673970055SRussell King } 241773970055SRussell King 241873970055SRussell King static void sfp_poll(struct work_struct *work) 241973970055SRussell King { 242073970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 242173970055SRussell King 242273970055SRussell King sfp_check_state(sfp); 2423f3c9a666SRussell King 2424f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2425f3c9a666SRussell King sfp->need_poll) 242673970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 242773970055SRussell King } 242873970055SRussell King 242973970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 243073970055SRussell King { 243173970055SRussell King struct sfp *sfp; 243273970055SRussell King 243373970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 243473970055SRussell King if (!sfp) 243573970055SRussell King return ERR_PTR(-ENOMEM); 243673970055SRussell King 243773970055SRussell King sfp->dev = dev; 243873970055SRussell King 243973970055SRussell King mutex_init(&sfp->sm_mutex); 24402158e856SRobert Hancock mutex_init(&sfp->st_mutex); 244173970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 244273970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 244373970055SRussell King 2444139d3a21SRussell King sfp_hwmon_init(sfp); 2445139d3a21SRussell King 244673970055SRussell King return sfp; 244773970055SRussell King } 244873970055SRussell King 244973970055SRussell King static void sfp_cleanup(void *data) 245073970055SRussell King { 245173970055SRussell King struct sfp *sfp = data; 245273970055SRussell King 2453139d3a21SRussell King sfp_hwmon_exit(sfp); 2454139d3a21SRussell King 245573970055SRussell King cancel_delayed_work_sync(&sfp->poll); 245673970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 245773970055SRussell King if (sfp->i2c_mii) { 245873970055SRussell King mdiobus_unregister(sfp->i2c_mii); 245973970055SRussell King mdiobus_free(sfp->i2c_mii); 246073970055SRussell King } 246173970055SRussell King if (sfp->i2c) 246273970055SRussell King i2c_put_adapter(sfp->i2c); 246373970055SRussell King kfree(sfp); 246473970055SRussell King } 246573970055SRussell King 246673970055SRussell King static int sfp_probe(struct platform_device *pdev) 246773970055SRussell King { 2468259c8618SRussell King const struct sff_data *sff; 24697ce236faSRuslan Babayev struct i2c_adapter *i2c; 24705411ca71SChris Healy char *sfp_irq_name; 247173970055SRussell King struct sfp *sfp; 2472257c2559SRobert Hancock int err, i; 247373970055SRussell King 247473970055SRussell King sfp = sfp_alloc(&pdev->dev); 247573970055SRussell King if (IS_ERR(sfp)) 247673970055SRussell King return PTR_ERR(sfp); 247773970055SRussell King 247873970055SRussell King platform_set_drvdata(pdev, sfp); 247973970055SRussell King 248073970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 248173970055SRussell King if (err < 0) 248273970055SRussell King return err; 248373970055SRussell King 2484259c8618SRussell King sff = sfp->type = &sfp_data; 2485259c8618SRussell King 248673970055SRussell King if (pdev->dev.of_node) { 248773970055SRussell King struct device_node *node = pdev->dev.of_node; 2488259c8618SRussell King const struct of_device_id *id; 248973970055SRussell King struct device_node *np; 249073970055SRussell King 2491259c8618SRussell King id = of_match_node(sfp_of_match, node); 2492259c8618SRussell King if (WARN_ON(!id)) 2493259c8618SRussell King return -EINVAL; 2494259c8618SRussell King 2495259c8618SRussell King sff = sfp->type = id->data; 2496259c8618SRussell King 249773970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 249866ede1f9SAntoine Tenart if (!np) { 249966ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 250066ede1f9SAntoine Tenart return -ENODEV; 250166ede1f9SAntoine Tenart } 250273970055SRussell King 250373970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 250473970055SRussell King of_node_put(np); 25057ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 25067ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 25077ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 25087ce236faSRuslan Babayev struct fwnode_reference_args args; 25097ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 25107ce236faSRuslan Babayev int ret; 25117ce236faSRuslan Babayev 25127ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 25131086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 25147ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 25157ce236faSRuslan Babayev return -ENODEV; 25167ce236faSRuslan Babayev } 25177ce236faSRuslan Babayev 25187ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 25197ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 25207ce236faSRuslan Babayev } else { 25217ce236faSRuslan Babayev return -EINVAL; 25227ce236faSRuslan Babayev } 25237ce236faSRuslan Babayev 252473970055SRussell King if (!i2c) 252573970055SRussell King return -EPROBE_DEFER; 252673970055SRussell King 252773970055SRussell King err = sfp_i2c_configure(sfp, i2c); 252873970055SRussell King if (err < 0) { 252973970055SRussell King i2c_put_adapter(i2c); 253073970055SRussell King return err; 253173970055SRussell King } 253273970055SRussell King 2533259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2534259c8618SRussell King if (sff->gpios & BIT(i)) { 253573970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 253673970055SRussell King gpio_of_names[i], gpio_flags[i]); 253773970055SRussell King if (IS_ERR(sfp->gpio[i])) 253873970055SRussell King return PTR_ERR(sfp->gpio[i]); 253973970055SRussell King } 254073970055SRussell King 254173970055SRussell King sfp->get_state = sfp_gpio_get_state; 254273970055SRussell King sfp->set_state = sfp_gpio_set_state; 2543259c8618SRussell King 2544259c8618SRussell King /* Modules that have no detect signal are always present */ 2545259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2546259c8618SRussell King sfp->get_state = sff_gpio_get_state; 254773970055SRussell King 25483bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 25493bb35261SJon Nettleton &sfp->max_power_mW); 25503bb35261SJon Nettleton if (!sfp->max_power_mW) 25513bb35261SJon Nettleton sfp->max_power_mW = 1000; 25523bb35261SJon Nettleton 25533bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 25543bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 25553bb35261SJon Nettleton 255673970055SRussell King /* Get the initial state, and always signal TX disable, 255773970055SRussell King * since the network interface will not be up. 255873970055SRussell King */ 255973970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 256073970055SRussell King 256173970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 256273970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 256373970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 256473970055SRussell King sfp_set_state(sfp, sfp->state); 256573970055SRussell King sfp_module_tx_disable(sfp); 256673f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 256773f5e847SRussell King rtnl_lock(); 256873f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 256973f5e847SRussell King rtnl_unlock(); 257073f5e847SRussell King } 257173970055SRussell King 257273970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 257373970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 257473970055SRussell King continue; 257573970055SRussell King 2576257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 257796216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 257896216181SYueHaibing sfp->gpio_irq[i] = 0; 2579f3c9a666SRussell King sfp->need_poll = true; 258073970055SRussell King continue; 258173970055SRussell King } 258273970055SRussell King 25835411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 25845411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 25855411ca71SChris Healy gpio_of_names[i]); 25865411ca71SChris Healy 25878cb601f1SChris Healy if (!sfp_irq_name) 25888cb601f1SChris Healy return -ENOMEM; 25898cb601f1SChris Healy 2590257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2591257c2559SRobert Hancock NULL, sfp_irq, 259273970055SRussell King IRQF_ONESHOT | 259373970055SRussell King IRQF_TRIGGER_RISING | 259473970055SRussell King IRQF_TRIGGER_FALLING, 25955411ca71SChris Healy sfp_irq_name, sfp); 2596257c2559SRobert Hancock if (err) { 2597257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2598f3c9a666SRussell King sfp->need_poll = true; 259973970055SRussell King } 2600257c2559SRobert Hancock } 260173970055SRussell King 2602f3c9a666SRussell King if (sfp->need_poll) 260373970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 260473970055SRussell King 2605a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2606a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2607a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2608a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2609a1f5d1f0SAntoine Tenart */ 2610a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2611a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2612a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2613a1f5d1f0SAntoine Tenart 2614b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2615b5bfc21aSRussell King if (!sfp->sfp_bus) 2616b5bfc21aSRussell King return -ENOMEM; 2617b5bfc21aSRussell King 26189cc8976cSRussell King sfp_debugfs_init(sfp); 26199cc8976cSRussell King 262073970055SRussell King return 0; 262173970055SRussell King } 262273970055SRussell King 262373970055SRussell King static int sfp_remove(struct platform_device *pdev) 262473970055SRussell King { 262573970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 262673970055SRussell King 26279cc8976cSRussell King sfp_debugfs_exit(sfp); 262873970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 262973970055SRussell King 26300cb96b57SRussell King rtnl_lock(); 26310cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 26320cb96b57SRussell King rtnl_unlock(); 26330cb96b57SRussell King 263473970055SRussell King return 0; 263573970055SRussell King } 263673970055SRussell King 2637257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2638257c2559SRobert Hancock { 2639257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2640257c2559SRobert Hancock int i; 2641257c2559SRobert Hancock 2642257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2643257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2644257c2559SRobert Hancock continue; 2645257c2559SRobert Hancock 2646257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2647257c2559SRobert Hancock } 2648257c2559SRobert Hancock 2649257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2650257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2651257c2559SRobert Hancock } 2652257c2559SRobert Hancock 265373970055SRussell King static struct platform_driver sfp_driver = { 265473970055SRussell King .probe = sfp_probe, 265573970055SRussell King .remove = sfp_remove, 2656257c2559SRobert Hancock .shutdown = sfp_shutdown, 265773970055SRussell King .driver = { 265873970055SRussell King .name = "sfp", 265973970055SRussell King .of_match_table = sfp_of_match, 266073970055SRussell King }, 266173970055SRussell King }; 266273970055SRussell King 266373970055SRussell King static int sfp_init(void) 266473970055SRussell King { 266573970055SRussell King poll_jiffies = msecs_to_jiffies(100); 266673970055SRussell King 266773970055SRussell King return platform_driver_register(&sfp_driver); 266873970055SRussell King } 266973970055SRussell King module_init(sfp_init); 267073970055SRussell King 267173970055SRussell King static void sfp_exit(void) 267273970055SRussell King { 267373970055SRussell King platform_driver_unregister(&sfp_driver); 267473970055SRussell King } 267573970055SRussell King module_exit(sfp_exit); 267673970055SRussell King 267773970055SRussell King MODULE_ALIAS("platform:sfp"); 267873970055SRussell King MODULE_AUTHOR("Russell King"); 267973970055SRussell King MODULE_LICENSE("GPL v2"); 2680