1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 27ce236faSRuslan Babayev #include <linux/acpi.h> 31323061aSAndrew Lunn #include <linux/ctype.h> 49cc8976cSRussell King #include <linux/debugfs.h> 573970055SRussell King #include <linux/delay.h> 654a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 71323061aSAndrew Lunn #include <linux/hwmon.h> 873970055SRussell King #include <linux/i2c.h> 973970055SRussell King #include <linux/interrupt.h> 1073970055SRussell King #include <linux/jiffies.h> 11fcba68bdSAndrew Lunn #include <linux/mdio/mdio-i2c.h> 1273970055SRussell King #include <linux/module.h> 1373970055SRussell King #include <linux/mutex.h> 1473970055SRussell King #include <linux/of.h> 1573970055SRussell King #include <linux/phy.h> 1673970055SRussell King #include <linux/platform_device.h> 1773970055SRussell King #include <linux/rtnetlink.h> 1873970055SRussell King #include <linux/slab.h> 1973970055SRussell King #include <linux/workqueue.h> 2073970055SRussell King 2173970055SRussell King #include "sfp.h" 2273970055SRussell King #include "swphy.h" 2373970055SRussell King 2473970055SRussell King enum { 2573970055SRussell King GPIO_MODDEF0, 2673970055SRussell King GPIO_LOS, 2773970055SRussell King GPIO_TX_FAULT, 2873970055SRussell King GPIO_TX_DISABLE, 2973970055SRussell King GPIO_RATE_SELECT, 3073970055SRussell King GPIO_MAX, 3173970055SRussell King 3273970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3373970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3473970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3573970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3673970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3773970055SRussell King 3873970055SRussell King SFP_E_INSERT = 0, 3973970055SRussell King SFP_E_REMOVE, 406b0da5c9SRussell King SFP_E_DEV_ATTACH, 416b0da5c9SRussell King SFP_E_DEV_DETACH, 4273970055SRussell King SFP_E_DEV_DOWN, 4373970055SRussell King SFP_E_DEV_UP, 4473970055SRussell King SFP_E_TX_FAULT, 4573970055SRussell King SFP_E_TX_CLEAR, 4673970055SRussell King SFP_E_LOS_HIGH, 4773970055SRussell King SFP_E_LOS_LOW, 4873970055SRussell King SFP_E_TIMEOUT, 4973970055SRussell King 5073970055SRussell King SFP_MOD_EMPTY = 0, 5173f5e847SRussell King SFP_MOD_ERROR, 5273970055SRussell King SFP_MOD_PROBE, 5373f5e847SRussell King SFP_MOD_WAITDEV, 543bb35261SJon Nettleton SFP_MOD_HPOWER, 55b036a554SRussell King SFP_MOD_WAITPWR, 5673970055SRussell King SFP_MOD_PRESENT, 5773970055SRussell King 586b0da5c9SRussell King SFP_DEV_DETACHED = 0, 596b0da5c9SRussell King SFP_DEV_DOWN, 6073970055SRussell King SFP_DEV_UP, 6173970055SRussell King 6273970055SRussell King SFP_S_DOWN = 0, 6374c551caSRussell King SFP_S_FAIL, 64eefa6f1fSRussell King SFP_S_WAIT, 6573970055SRussell King SFP_S_INIT, 661cb89a14SRussell King SFP_S_INIT_PHY, 67d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6873970055SRussell King SFP_S_WAIT_LOS, 6973970055SRussell King SFP_S_LINK_UP, 7073970055SRussell King SFP_S_TX_FAULT, 7173970055SRussell King SFP_S_REINIT, 7273970055SRussell King SFP_S_TX_DISABLE, 7373970055SRussell King }; 7473970055SRussell King 754005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 764005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7773f5e847SRussell King [SFP_MOD_ERROR] = "error", 784005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7973f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 804005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 81b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 824005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 834005a7cbSAndrew Lunn }; 844005a7cbSAndrew Lunn 854005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 864005a7cbSAndrew Lunn { 874005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 884005a7cbSAndrew Lunn return "Unknown module state"; 894005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 904005a7cbSAndrew Lunn } 914005a7cbSAndrew Lunn 924005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 936b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 944005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 954005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 964005a7cbSAndrew Lunn }; 974005a7cbSAndrew Lunn 984005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 994005a7cbSAndrew Lunn { 1004005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 1014005a7cbSAndrew Lunn return "Unknown device state"; 1024005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1034005a7cbSAndrew Lunn } 1044005a7cbSAndrew Lunn 1054005a7cbSAndrew Lunn static const char * const event_strings[] = { 1064005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1074005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1086b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1096b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1104005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1114005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1124005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1134005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1144005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1154005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1164005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1174005a7cbSAndrew Lunn }; 1184005a7cbSAndrew Lunn 1194005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1204005a7cbSAndrew Lunn { 1214005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1224005a7cbSAndrew Lunn return "Unknown event"; 1234005a7cbSAndrew Lunn return event_strings[event]; 1244005a7cbSAndrew Lunn } 1254005a7cbSAndrew Lunn 1264005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1274005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 12874c551caSRussell King [SFP_S_FAIL] = "fail", 129eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1304005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1311cb89a14SRussell King [SFP_S_INIT_PHY] = "init_phy", 132d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1334005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1344005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1354005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1364005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 13725a9da66SSean Anderson [SFP_S_TX_DISABLE] = "tx_disable", 1384005a7cbSAndrew Lunn }; 1394005a7cbSAndrew Lunn 1404005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1414005a7cbSAndrew Lunn { 1424005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1434005a7cbSAndrew Lunn return "Unknown state"; 1444005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1454005a7cbSAndrew Lunn } 1464005a7cbSAndrew Lunn 14773970055SRussell King static const char *gpio_of_names[] = { 14825ee0793SBaruch Siach "mod-def0", 14973970055SRussell King "los", 15073970055SRussell King "tx-fault", 15173970055SRussell King "tx-disable", 15225ee0793SBaruch Siach "rate-select0", 15373970055SRussell King }; 15473970055SRussell King 15573970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15673970055SRussell King GPIOD_IN, 15773970055SRussell King GPIOD_IN, 15873970055SRussell King GPIOD_IN, 15973970055SRussell King GPIOD_ASIS, 16073970055SRussell King GPIOD_ASIS, 16173970055SRussell King }; 16273970055SRussell King 16326c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16426c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16526c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 16626c97a2dSRussell King * on board (for a copper SFP) time to initialise. 16726c97a2dSRussell King */ 168eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 16926c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 17026c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17126c97a2dSRussell King 17226c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17326c97a2dSRussell King * an indicated TX_FAULT. 17426c97a2dSRussell King */ 17573970055SRussell King #define T_RESET_US 10 17673970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 17773970055SRussell King 17865ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 17965ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 18065ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18165ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18265ef2d5cSRussell King */ 18365ef2d5cSRussell King #define N_FAULT_INIT 5 18465ef2d5cSRussell King #define N_FAULT 5 18565ef2d5cSRussell King 1861cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1871cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1881cb89a14SRussell King */ 1891cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1901cb89a14SRussell King #define R_PHY_RETRY 12 1911cb89a14SRussell King 19273970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19373970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19473970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 19573970055SRussell King * 196d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 197d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 19873970055SRussell King */ 199d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 2003bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 201e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 202e117be74SRussell King #define R_PROBE_RETRY_INIT 10 203e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 204e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 20573970055SRussell King 206516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 20773970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 20873970055SRussell King */ 20973970055SRussell King #define SFP_PHY_ADDR 22 21073970055SRussell King 211259c8618SRussell King struct sff_data { 212259c8618SRussell King unsigned int gpios; 213259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 214259c8618SRussell King }; 215259c8618SRussell King 21673970055SRussell King struct sfp { 21773970055SRussell King struct device *dev; 21873970055SRussell King struct i2c_adapter *i2c; 21973970055SRussell King struct mii_bus *i2c_mii; 22073970055SRussell King struct sfp_bus *sfp_bus; 22173970055SRussell King struct phy_device *mod_phy; 222259c8618SRussell King const struct sff_data *type; 2230d035bedSRussell King size_t i2c_block_size; 2243bb35261SJon Nettleton u32 max_power_mW; 22573970055SRussell King 22673970055SRussell King unsigned int (*get_state)(struct sfp *); 22773970055SRussell King void (*set_state)(struct sfp *, unsigned int); 22873970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2293bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 23073970055SRussell King 23173970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 232257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 23373970055SRussell King 234f3c9a666SRussell King bool need_poll; 235f3c9a666SRussell King 2362158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 237*8475c4b7SRussell King (Oracle) unsigned int state_hw_mask; 238f3c9a666SRussell King unsigned int state_soft_mask; 23973970055SRussell King unsigned int state; 24073970055SRussell King struct delayed_work poll; 24173970055SRussell King struct delayed_work timeout; 2422158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 24373970055SRussell King unsigned char sm_mod_state; 244e117be74SRussell King unsigned char sm_mod_tries_init; 245e117be74SRussell King unsigned char sm_mod_tries; 24673970055SRussell King unsigned char sm_dev_state; 24773970055SRussell King unsigned short sm_state; 248281e4eabSRussell King unsigned char sm_fault_retries; 2491cb89a14SRussell King unsigned char sm_phy_retries; 25073970055SRussell King 25173970055SRussell King struct sfp_eeprom_id id; 252ed32abb1SRussell King unsigned int module_power_mW; 25326c97a2dSRussell King unsigned int module_t_start_up; 2542069624dSMatthew Hagan bool tx_fault_ignore; 255ed32abb1SRussell King 2561323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2571323061aSAndrew Lunn struct sfp_diag diag; 258139d3a21SRussell King struct delayed_work hwmon_probe; 259139d3a21SRussell King unsigned int hwmon_tries; 2601323061aSAndrew Lunn struct device *hwmon_dev; 2611323061aSAndrew Lunn char *hwmon_name; 2621323061aSAndrew Lunn #endif 2631323061aSAndrew Lunn 2649cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2659cc8976cSRussell King struct dentry *debugfs_dir; 2669cc8976cSRussell King #endif 26773970055SRussell King }; 26873970055SRussell King 269259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 270259c8618SRussell King { 2710fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 272259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 273259c8618SRussell King } 274259c8618SRussell King 275259c8618SRussell King static const struct sff_data sff_data = { 276259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 277259c8618SRussell King .module_supported = sff_module_supported, 278259c8618SRussell King }; 279259c8618SRussell King 280259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 281259c8618SRussell King { 282f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFP && 283f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) 284f0b4f847SPali Rohár return true; 285f0b4f847SPali Rohár 286f0b4f847SPali Rohár /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored 287f0b4f847SPali Rohár * phys id SFF instead of SFP. Therefore mark this module explicitly 288f0b4f847SPali Rohár * as supported based on vendor name and pn match. 289f0b4f847SPali Rohár */ 290f0b4f847SPali Rohár if (id->base.phys_id == SFF8024_ID_SFF_8472 && 291f0b4f847SPali Rohár id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && 292f0b4f847SPali Rohár !memcmp(id->base.vendor_name, "UBNT ", 16) && 293f0b4f847SPali Rohár !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) 294f0b4f847SPali Rohár return true; 295f0b4f847SPali Rohár 296f0b4f847SPali Rohár return false; 297259c8618SRussell King } 298259c8618SRussell King 299259c8618SRussell King static const struct sff_data sfp_data = { 300259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 301259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 302259c8618SRussell King .module_supported = sfp_module_supported, 303259c8618SRussell King }; 304259c8618SRussell King 305259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 306259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 307259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 308259c8618SRussell King { }, 309259c8618SRussell King }; 310259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 311259c8618SRussell King 31273970055SRussell King static unsigned long poll_jiffies; 31373970055SRussell King 31473970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 31573970055SRussell King { 31673970055SRussell King unsigned int i, state, v; 31773970055SRussell King 31873970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 31973970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 32073970055SRussell King continue; 32173970055SRussell King 32273970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 32373970055SRussell King if (v) 32473970055SRussell King state |= BIT(i); 32573970055SRussell King } 32673970055SRussell King 32773970055SRussell King return state; 32873970055SRussell King } 32973970055SRussell King 330259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 331259c8618SRussell King { 332259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 333259c8618SRussell King } 334259c8618SRussell King 33573970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 33673970055SRussell King { 33773970055SRussell King if (state & SFP_F_PRESENT) { 33873970055SRussell King /* If the module is present, drive the signals */ 33973970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 34073970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 34173970055SRussell King state & SFP_F_TX_DISABLE); 34273970055SRussell King if (state & SFP_F_RATE_SELECT) 34373970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 34473970055SRussell King state & SFP_F_RATE_SELECT); 34573970055SRussell King } else { 34673970055SRussell King /* Otherwise, let them float to the pull-ups */ 34773970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 34873970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 34973970055SRussell King if (state & SFP_F_RATE_SELECT) 35073970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 35173970055SRussell King } 35273970055SRussell King } 35373970055SRussell King 3543bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3553bb35261SJon Nettleton size_t len) 35673970055SRussell King { 35773970055SRussell King struct i2c_msg msgs[2]; 358426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 359426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 36028e74a7cSRussell King size_t this_len; 36173970055SRussell King int ret; 36273970055SRussell King 36373970055SRussell King msgs[0].addr = bus_addr; 36473970055SRussell King msgs[0].flags = 0; 36573970055SRussell King msgs[0].len = 1; 36673970055SRussell King msgs[0].buf = &dev_addr; 36773970055SRussell King msgs[1].addr = bus_addr; 36873970055SRussell King msgs[1].flags = I2C_M_RD; 36973970055SRussell King msgs[1].len = len; 37073970055SRussell King msgs[1].buf = buf; 37173970055SRussell King 37228e74a7cSRussell King while (len) { 37328e74a7cSRussell King this_len = len; 3740d035bedSRussell King if (this_len > block_size) 3750d035bedSRussell King this_len = block_size; 37628e74a7cSRussell King 37728e74a7cSRussell King msgs[1].len = this_len; 37828e74a7cSRussell King 3793bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 38073970055SRussell King if (ret < 0) 38173970055SRussell King return ret; 38273970055SRussell King 38328e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 38428e74a7cSRussell King break; 38528e74a7cSRussell King 38628e74a7cSRussell King msgs[1].buf += this_len; 38728e74a7cSRussell King dev_addr += this_len; 38828e74a7cSRussell King len -= this_len; 38928e74a7cSRussell King } 39028e74a7cSRussell King 39128e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 39273970055SRussell King } 39373970055SRussell King 3943bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 39573970055SRussell King size_t len) 39673970055SRussell King { 3973bb35261SJon Nettleton struct i2c_msg msgs[1]; 3983bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3993bb35261SJon Nettleton int ret; 4003bb35261SJon Nettleton 4013bb35261SJon Nettleton msgs[0].addr = bus_addr; 4023bb35261SJon Nettleton msgs[0].flags = 0; 4033bb35261SJon Nettleton msgs[0].len = 1 + len; 4043bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 4053bb35261SJon Nettleton if (!msgs[0].buf) 4063bb35261SJon Nettleton return -ENOMEM; 4073bb35261SJon Nettleton 4083bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 4093bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 4103bb35261SJon Nettleton 4113bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 4123bb35261SJon Nettleton 4133bb35261SJon Nettleton kfree(msgs[0].buf); 4143bb35261SJon Nettleton 4153bb35261SJon Nettleton if (ret < 0) 4163bb35261SJon Nettleton return ret; 4173bb35261SJon Nettleton 4183bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 41973970055SRussell King } 42073970055SRussell King 42173970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 42273970055SRussell King { 42373970055SRussell King struct mii_bus *i2c_mii; 42473970055SRussell King int ret; 42573970055SRussell King 42673970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 42773970055SRussell King return -EINVAL; 42873970055SRussell King 42973970055SRussell King sfp->i2c = i2c; 43073970055SRussell King sfp->read = sfp_i2c_read; 4313bb35261SJon Nettleton sfp->write = sfp_i2c_write; 43273970055SRussell King 43373970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 43473970055SRussell King if (IS_ERR(i2c_mii)) 43573970055SRussell King return PTR_ERR(i2c_mii); 43673970055SRussell King 43773970055SRussell King i2c_mii->name = "SFP I2C Bus"; 43873970055SRussell King i2c_mii->phy_mask = ~0; 43973970055SRussell King 44073970055SRussell King ret = mdiobus_register(i2c_mii); 44173970055SRussell King if (ret < 0) { 44273970055SRussell King mdiobus_free(i2c_mii); 44373970055SRussell King return ret; 44473970055SRussell King } 44573970055SRussell King 44673970055SRussell King sfp->i2c_mii = i2c_mii; 44773970055SRussell King 44873970055SRussell King return 0; 44973970055SRussell King } 45073970055SRussell King 45173970055SRussell King /* Interface */ 45273970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 45373970055SRussell King { 45473970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 45573970055SRussell King } 45673970055SRussell King 4573bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4583bb35261SJon Nettleton { 4593bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4603bb35261SJon Nettleton } 4613bb35261SJon Nettleton 462f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 463f3c9a666SRussell King { 464f3c9a666SRussell King unsigned int state = 0; 465f3c9a666SRussell King u8 status; 4660dea4d03SRussell King int ret; 467f3c9a666SRussell King 4680dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 4690dea4d03SRussell King if (ret == sizeof(status)) { 470f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 471f3c9a666SRussell King state |= SFP_F_LOS; 472f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 473f3c9a666SRussell King state |= SFP_F_TX_FAULT; 4740dea4d03SRussell King } else { 4750dea4d03SRussell King dev_err_ratelimited(sfp->dev, 4769ae1ef4bSRussell King (Oracle) "failed to read SFP soft status: %pe\n", 4779ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 4780dea4d03SRussell King /* Preserve the current state */ 4790dea4d03SRussell King state = sfp->state; 480f3c9a666SRussell King } 481f3c9a666SRussell King 482f3c9a666SRussell King return state & sfp->state_soft_mask; 483f3c9a666SRussell King } 484f3c9a666SRussell King 485f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 486f3c9a666SRussell King { 487f3c9a666SRussell King u8 status; 488f3c9a666SRussell King 489f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 490f3c9a666SRussell King sizeof(status)) { 491f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 492f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 493f3c9a666SRussell King else 494f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 495f3c9a666SRussell King 496f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 497f3c9a666SRussell King } 498f3c9a666SRussell King } 499f3c9a666SRussell King 500f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 501f3c9a666SRussell King { 502f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 503*8475c4b7SRussell King (Oracle) unsigned int mask = 0; 504f3c9a666SRussell King 505f3c9a666SRussell King sfp->state_soft_mask = 0; 506*8475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) 507*8475c4b7SRussell King (Oracle) mask |= SFP_F_TX_DISABLE; 508*8475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) 509*8475c4b7SRussell King (Oracle) mask |= SFP_F_TX_FAULT; 510*8475c4b7SRussell King (Oracle) if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) 511*8475c4b7SRussell King (Oracle) mask |= SFP_F_LOS; 512*8475c4b7SRussell King (Oracle) 513*8475c4b7SRussell King (Oracle) // Poll the soft state for hardware pins we want to ignore 514*8475c4b7SRussell King (Oracle) sfp->state_soft_mask = ~sfp->state_hw_mask & mask; 515f3c9a666SRussell King 516f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 517f3c9a666SRussell King !sfp->need_poll) 518f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 519f3c9a666SRussell King } 520f3c9a666SRussell King 521f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 522f3c9a666SRussell King { 523f3c9a666SRussell King sfp->state_soft_mask = 0; 524f3c9a666SRussell King } 525f3c9a666SRussell King 526f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 527f3c9a666SRussell King { 528*8475c4b7SRussell King (Oracle) unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); 529*8475c4b7SRussell King (Oracle) unsigned int state; 530f3c9a666SRussell King 531*8475c4b7SRussell King (Oracle) state = sfp->get_state(sfp) & sfp->state_hw_mask; 532*8475c4b7SRussell King (Oracle) if (state & SFP_F_PRESENT && soft) 533f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 534f3c9a666SRussell King 535f3c9a666SRussell King return state; 536f3c9a666SRussell King } 537f3c9a666SRussell King 538f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 539f3c9a666SRussell King { 540f3c9a666SRussell King sfp->set_state(sfp, state); 541f3c9a666SRussell King 542f3c9a666SRussell King if (state & SFP_F_PRESENT && 543f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 544f3c9a666SRussell King sfp_soft_set_state(sfp, state); 545f3c9a666SRussell King } 546f3c9a666SRussell King 54773970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 54873970055SRussell King { 54973970055SRussell King u8 *p, check; 55073970055SRussell King 55173970055SRussell King for (p = buf, check = 0; len; p++, len--) 55273970055SRussell King check += *p; 55373970055SRussell King 55473970055SRussell King return check; 55573970055SRussell King } 55673970055SRussell King 5571323061aSAndrew Lunn /* hwmon */ 5581323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 5591323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5601323061aSAndrew Lunn enum hwmon_sensor_types type, 5611323061aSAndrew Lunn u32 attr, int channel) 5621323061aSAndrew Lunn { 5631323061aSAndrew Lunn const struct sfp *sfp = data; 5641323061aSAndrew Lunn 5651323061aSAndrew Lunn switch (type) { 5661323061aSAndrew Lunn case hwmon_temp: 5671323061aSAndrew Lunn switch (attr) { 5681323061aSAndrew Lunn case hwmon_temp_min_alarm: 5691323061aSAndrew Lunn case hwmon_temp_max_alarm: 5701323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5711323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5721323061aSAndrew Lunn case hwmon_temp_min: 5731323061aSAndrew Lunn case hwmon_temp_max: 5741323061aSAndrew Lunn case hwmon_temp_lcrit: 5751323061aSAndrew Lunn case hwmon_temp_crit: 576a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 577a33710bdSAndrew Lunn return 0; 578df561f66SGustavo A. R. Silva fallthrough; 579a33710bdSAndrew Lunn case hwmon_temp_input: 580c1236979SAndrew Lunn case hwmon_temp_label: 5811323061aSAndrew Lunn return 0444; 5821323061aSAndrew Lunn default: 5831323061aSAndrew Lunn return 0; 5841323061aSAndrew Lunn } 5851323061aSAndrew Lunn case hwmon_in: 5861323061aSAndrew Lunn switch (attr) { 5871323061aSAndrew Lunn case hwmon_in_min_alarm: 5881323061aSAndrew Lunn case hwmon_in_max_alarm: 5891323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5901323061aSAndrew Lunn case hwmon_in_crit_alarm: 5911323061aSAndrew Lunn case hwmon_in_min: 5921323061aSAndrew Lunn case hwmon_in_max: 5931323061aSAndrew Lunn case hwmon_in_lcrit: 5941323061aSAndrew Lunn case hwmon_in_crit: 595a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 596a33710bdSAndrew Lunn return 0; 597df561f66SGustavo A. R. Silva fallthrough; 598a33710bdSAndrew Lunn case hwmon_in_input: 599c1236979SAndrew Lunn case hwmon_in_label: 6001323061aSAndrew Lunn return 0444; 6011323061aSAndrew Lunn default: 6021323061aSAndrew Lunn return 0; 6031323061aSAndrew Lunn } 6041323061aSAndrew Lunn case hwmon_curr: 6051323061aSAndrew Lunn switch (attr) { 6061323061aSAndrew Lunn case hwmon_curr_min_alarm: 6071323061aSAndrew Lunn case hwmon_curr_max_alarm: 6081323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 6091323061aSAndrew Lunn case hwmon_curr_crit_alarm: 6101323061aSAndrew Lunn case hwmon_curr_min: 6111323061aSAndrew Lunn case hwmon_curr_max: 6121323061aSAndrew Lunn case hwmon_curr_lcrit: 6131323061aSAndrew Lunn case hwmon_curr_crit: 614a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 615a33710bdSAndrew Lunn return 0; 616df561f66SGustavo A. R. Silva fallthrough; 617a33710bdSAndrew Lunn case hwmon_curr_input: 618c1236979SAndrew Lunn case hwmon_curr_label: 6191323061aSAndrew Lunn return 0444; 6201323061aSAndrew Lunn default: 6211323061aSAndrew Lunn return 0; 6221323061aSAndrew Lunn } 6231323061aSAndrew Lunn case hwmon_power: 6241323061aSAndrew Lunn /* External calibration of receive power requires 6251323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 6261323061aSAndrew Lunn * is not easy, so just skip it. If the module does 6271323061aSAndrew Lunn * not require external calibration, we can however 6281323061aSAndrew Lunn * show receiver power, since FP is then not needed. 6291323061aSAndrew Lunn */ 6301323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 6311323061aSAndrew Lunn channel == 1) 6321323061aSAndrew Lunn return 0; 6331323061aSAndrew Lunn switch (attr) { 6341323061aSAndrew Lunn case hwmon_power_min_alarm: 6351323061aSAndrew Lunn case hwmon_power_max_alarm: 6361323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 6371323061aSAndrew Lunn case hwmon_power_crit_alarm: 6381323061aSAndrew Lunn case hwmon_power_min: 6391323061aSAndrew Lunn case hwmon_power_max: 6401323061aSAndrew Lunn case hwmon_power_lcrit: 6411323061aSAndrew Lunn case hwmon_power_crit: 642a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 643a33710bdSAndrew Lunn return 0; 644df561f66SGustavo A. R. Silva fallthrough; 645a33710bdSAndrew Lunn case hwmon_power_input: 646c1236979SAndrew Lunn case hwmon_power_label: 6471323061aSAndrew Lunn return 0444; 6481323061aSAndrew Lunn default: 6491323061aSAndrew Lunn return 0; 6501323061aSAndrew Lunn } 6511323061aSAndrew Lunn default: 6521323061aSAndrew Lunn return 0; 6531323061aSAndrew Lunn } 6541323061aSAndrew Lunn } 6551323061aSAndrew Lunn 6561323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 6571323061aSAndrew Lunn { 6581323061aSAndrew Lunn __be16 val; 6591323061aSAndrew Lunn int err; 6601323061aSAndrew Lunn 6611323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6621323061aSAndrew Lunn if (err < 0) 6631323061aSAndrew Lunn return err; 6641323061aSAndrew Lunn 6651323061aSAndrew Lunn *value = be16_to_cpu(val); 6661323061aSAndrew Lunn 6671323061aSAndrew Lunn return 0; 6681323061aSAndrew Lunn } 6691323061aSAndrew Lunn 6701323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6711323061aSAndrew Lunn { 6720cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6731323061aSAndrew Lunn } 6741323061aSAndrew Lunn 6751323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6761323061aSAndrew Lunn long *value) 6771323061aSAndrew Lunn { 6781323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6791323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6801323061aSAndrew Lunn } 6811323061aSAndrew Lunn 6821323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6831323061aSAndrew Lunn { 6841323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6851323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6861323061aSAndrew Lunn 6871323061aSAndrew Lunn if (*value >= 0x8000) 6881323061aSAndrew Lunn *value -= 0x10000; 6891323061aSAndrew Lunn 6901323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6911323061aSAndrew Lunn } 6921323061aSAndrew Lunn 6931323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6941323061aSAndrew Lunn { 6951323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6961323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6971323061aSAndrew Lunn 6981323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6991323061aSAndrew Lunn } 7001323061aSAndrew Lunn 7011323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 7021323061aSAndrew Lunn { 7031323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 7041323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 7051323061aSAndrew Lunn 7061323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 7071323061aSAndrew Lunn } 7081323061aSAndrew Lunn 7091323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 7101323061aSAndrew Lunn { 7111323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 7121323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 7131323061aSAndrew Lunn 7141323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 7151323061aSAndrew Lunn } 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 7181323061aSAndrew Lunn { 7191323061aSAndrew Lunn int err; 7201323061aSAndrew Lunn 7211323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7221323061aSAndrew Lunn if (err < 0) 7231323061aSAndrew Lunn return err; 7241323061aSAndrew Lunn 7251323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7261323061aSAndrew Lunn 7271323061aSAndrew Lunn return 0; 7281323061aSAndrew Lunn } 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 7311323061aSAndrew Lunn { 7321323061aSAndrew Lunn int err; 7331323061aSAndrew Lunn 7341323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7351323061aSAndrew Lunn if (err < 0) 7361323061aSAndrew Lunn return err; 7371323061aSAndrew Lunn 7381323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7391323061aSAndrew Lunn 7401323061aSAndrew Lunn return 0; 7411323061aSAndrew Lunn } 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 7441323061aSAndrew Lunn { 7451323061aSAndrew Lunn int err; 7461323061aSAndrew Lunn 7471323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7481323061aSAndrew Lunn if (err < 0) 7491323061aSAndrew Lunn return err; 7501323061aSAndrew Lunn 7511323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7521323061aSAndrew Lunn 7531323061aSAndrew Lunn return 0; 7541323061aSAndrew Lunn } 7551323061aSAndrew Lunn 7561323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 7571323061aSAndrew Lunn { 7581323061aSAndrew Lunn int err; 7591323061aSAndrew Lunn 7601323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7611323061aSAndrew Lunn if (err < 0) 7621323061aSAndrew Lunn return err; 7631323061aSAndrew Lunn 7641323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7651323061aSAndrew Lunn 7661323061aSAndrew Lunn return 0; 7671323061aSAndrew Lunn } 7681323061aSAndrew Lunn 7691323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7701323061aSAndrew Lunn { 7711323061aSAndrew Lunn int err; 7721323061aSAndrew Lunn 7731323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7741323061aSAndrew Lunn if (err < 0) 7751323061aSAndrew Lunn return err; 7761323061aSAndrew Lunn 7771323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn return 0; 7801323061aSAndrew Lunn } 7811323061aSAndrew Lunn 7821323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7831323061aSAndrew Lunn { 7841323061aSAndrew Lunn u8 status; 7851323061aSAndrew Lunn int err; 7861323061aSAndrew Lunn 7871323061aSAndrew Lunn switch (attr) { 7881323061aSAndrew Lunn case hwmon_temp_input: 7891323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7901323061aSAndrew Lunn 7911323061aSAndrew Lunn case hwmon_temp_lcrit: 7921323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7931323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7941323061aSAndrew Lunn return 0; 7951323061aSAndrew Lunn 7961323061aSAndrew Lunn case hwmon_temp_min: 7971323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7981323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7991323061aSAndrew Lunn return 0; 8001323061aSAndrew Lunn case hwmon_temp_max: 8011323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 8021323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8031323061aSAndrew Lunn return 0; 8041323061aSAndrew Lunn 8051323061aSAndrew Lunn case hwmon_temp_crit: 8061323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 8071323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 8081323061aSAndrew Lunn return 0; 8091323061aSAndrew Lunn 8101323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 8111323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8121323061aSAndrew Lunn if (err < 0) 8131323061aSAndrew Lunn return err; 8141323061aSAndrew Lunn 8151323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 8161323061aSAndrew Lunn return 0; 8171323061aSAndrew Lunn 8181323061aSAndrew Lunn case hwmon_temp_min_alarm: 8191323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8201323061aSAndrew Lunn if (err < 0) 8211323061aSAndrew Lunn return err; 8221323061aSAndrew Lunn 8231323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 8241323061aSAndrew Lunn return 0; 8251323061aSAndrew Lunn 8261323061aSAndrew Lunn case hwmon_temp_max_alarm: 8271323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8281323061aSAndrew Lunn if (err < 0) 8291323061aSAndrew Lunn return err; 8301323061aSAndrew Lunn 8311323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 8321323061aSAndrew Lunn return 0; 8331323061aSAndrew Lunn 8341323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8351323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8361323061aSAndrew Lunn if (err < 0) 8371323061aSAndrew Lunn return err; 8381323061aSAndrew Lunn 8391323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 8401323061aSAndrew Lunn return 0; 8411323061aSAndrew Lunn default: 8421323061aSAndrew Lunn return -EOPNOTSUPP; 8431323061aSAndrew Lunn } 8441323061aSAndrew Lunn 8451323061aSAndrew Lunn return -EOPNOTSUPP; 8461323061aSAndrew Lunn } 8471323061aSAndrew Lunn 8481323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 8491323061aSAndrew Lunn { 8501323061aSAndrew Lunn u8 status; 8511323061aSAndrew Lunn int err; 8521323061aSAndrew Lunn 8531323061aSAndrew Lunn switch (attr) { 8541323061aSAndrew Lunn case hwmon_in_input: 8551323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 8561323061aSAndrew Lunn 8571323061aSAndrew Lunn case hwmon_in_lcrit: 8581323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 8591323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8601323061aSAndrew Lunn return 0; 8611323061aSAndrew Lunn 8621323061aSAndrew Lunn case hwmon_in_min: 8631323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8641323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8651323061aSAndrew Lunn return 0; 8661323061aSAndrew Lunn 8671323061aSAndrew Lunn case hwmon_in_max: 8681323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8691323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8701323061aSAndrew Lunn return 0; 8711323061aSAndrew Lunn 8721323061aSAndrew Lunn case hwmon_in_crit: 8731323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8741323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8751323061aSAndrew Lunn return 0; 8761323061aSAndrew Lunn 8771323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8781323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8791323061aSAndrew Lunn if (err < 0) 8801323061aSAndrew Lunn return err; 8811323061aSAndrew Lunn 8821323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8831323061aSAndrew Lunn return 0; 8841323061aSAndrew Lunn 8851323061aSAndrew Lunn case hwmon_in_min_alarm: 8861323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8871323061aSAndrew Lunn if (err < 0) 8881323061aSAndrew Lunn return err; 8891323061aSAndrew Lunn 8901323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 8911323061aSAndrew Lunn return 0; 8921323061aSAndrew Lunn 8931323061aSAndrew Lunn case hwmon_in_max_alarm: 8941323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8951323061aSAndrew Lunn if (err < 0) 8961323061aSAndrew Lunn return err; 8971323061aSAndrew Lunn 8981323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8991323061aSAndrew Lunn return 0; 9001323061aSAndrew Lunn 9011323061aSAndrew Lunn case hwmon_in_crit_alarm: 9021323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9031323061aSAndrew Lunn if (err < 0) 9041323061aSAndrew Lunn return err; 9051323061aSAndrew Lunn 9061323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 9071323061aSAndrew Lunn return 0; 9081323061aSAndrew Lunn default: 9091323061aSAndrew Lunn return -EOPNOTSUPP; 9101323061aSAndrew Lunn } 9111323061aSAndrew Lunn 9121323061aSAndrew Lunn return -EOPNOTSUPP; 9131323061aSAndrew Lunn } 9141323061aSAndrew Lunn 9151323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 9161323061aSAndrew Lunn { 9171323061aSAndrew Lunn u8 status; 9181323061aSAndrew Lunn int err; 9191323061aSAndrew Lunn 9201323061aSAndrew Lunn switch (attr) { 9211323061aSAndrew Lunn case hwmon_curr_input: 9221323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 9231323061aSAndrew Lunn 9241323061aSAndrew Lunn case hwmon_curr_lcrit: 9251323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 9261323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9271323061aSAndrew Lunn return 0; 9281323061aSAndrew Lunn 9291323061aSAndrew Lunn case hwmon_curr_min: 9301323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 9311323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9321323061aSAndrew Lunn return 0; 9331323061aSAndrew Lunn 9341323061aSAndrew Lunn case hwmon_curr_max: 9351323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 9361323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9371323061aSAndrew Lunn return 0; 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn case hwmon_curr_crit: 9401323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 9411323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9421323061aSAndrew Lunn return 0; 9431323061aSAndrew Lunn 9441323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9451323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9461323061aSAndrew Lunn if (err < 0) 9471323061aSAndrew Lunn return err; 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 9501323061aSAndrew Lunn return 0; 9511323061aSAndrew Lunn 9521323061aSAndrew Lunn case hwmon_curr_min_alarm: 9531323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9541323061aSAndrew Lunn if (err < 0) 9551323061aSAndrew Lunn return err; 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 9581323061aSAndrew Lunn return 0; 9591323061aSAndrew Lunn 9601323061aSAndrew Lunn case hwmon_curr_max_alarm: 9611323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9621323061aSAndrew Lunn if (err < 0) 9631323061aSAndrew Lunn return err; 9641323061aSAndrew Lunn 9651323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9661323061aSAndrew Lunn return 0; 9671323061aSAndrew Lunn 9681323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9691323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9701323061aSAndrew Lunn if (err < 0) 9711323061aSAndrew Lunn return err; 9721323061aSAndrew Lunn 9731323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9741323061aSAndrew Lunn return 0; 9751323061aSAndrew Lunn default: 9761323061aSAndrew Lunn return -EOPNOTSUPP; 9771323061aSAndrew Lunn } 9781323061aSAndrew Lunn 9791323061aSAndrew Lunn return -EOPNOTSUPP; 9801323061aSAndrew Lunn } 9811323061aSAndrew Lunn 9821323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9831323061aSAndrew Lunn { 9841323061aSAndrew Lunn u8 status; 9851323061aSAndrew Lunn int err; 9861323061aSAndrew Lunn 9871323061aSAndrew Lunn switch (attr) { 9881323061aSAndrew Lunn case hwmon_power_input: 9891323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9901323061aSAndrew Lunn 9911323061aSAndrew Lunn case hwmon_power_lcrit: 9921323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9931323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9941323061aSAndrew Lunn return 0; 9951323061aSAndrew Lunn 9961323061aSAndrew Lunn case hwmon_power_min: 9971323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9981323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9991323061aSAndrew Lunn return 0; 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn case hwmon_power_max: 10021323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 10031323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10041323061aSAndrew Lunn return 0; 10051323061aSAndrew Lunn 10061323061aSAndrew Lunn case hwmon_power_crit: 10071323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 10081323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 10091323061aSAndrew Lunn return 0; 10101323061aSAndrew Lunn 10111323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10121323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10131323061aSAndrew Lunn if (err < 0) 10141323061aSAndrew Lunn return err; 10151323061aSAndrew Lunn 10161323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 10171323061aSAndrew Lunn return 0; 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn case hwmon_power_min_alarm: 10201323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10211323061aSAndrew Lunn if (err < 0) 10221323061aSAndrew Lunn return err; 10231323061aSAndrew Lunn 10241323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 10251323061aSAndrew Lunn return 0; 10261323061aSAndrew Lunn 10271323061aSAndrew Lunn case hwmon_power_max_alarm: 10281323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10291323061aSAndrew Lunn if (err < 0) 10301323061aSAndrew Lunn return err; 10311323061aSAndrew Lunn 10321323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 10331323061aSAndrew Lunn return 0; 10341323061aSAndrew Lunn 10351323061aSAndrew Lunn case hwmon_power_crit_alarm: 10361323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10371323061aSAndrew Lunn if (err < 0) 10381323061aSAndrew Lunn return err; 10391323061aSAndrew Lunn 10401323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 10411323061aSAndrew Lunn return 0; 10421323061aSAndrew Lunn default: 10431323061aSAndrew Lunn return -EOPNOTSUPP; 10441323061aSAndrew Lunn } 10451323061aSAndrew Lunn 10461323061aSAndrew Lunn return -EOPNOTSUPP; 10471323061aSAndrew Lunn } 10481323061aSAndrew Lunn 10491323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 10501323061aSAndrew Lunn { 10511323061aSAndrew Lunn u8 status; 10521323061aSAndrew Lunn int err; 10531323061aSAndrew Lunn 10541323061aSAndrew Lunn switch (attr) { 10551323061aSAndrew Lunn case hwmon_power_input: 10561323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 10571323061aSAndrew Lunn 10581323061aSAndrew Lunn case hwmon_power_lcrit: 10591323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10601323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10611323061aSAndrew Lunn return 0; 10621323061aSAndrew Lunn 10631323061aSAndrew Lunn case hwmon_power_min: 10641323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10651323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10661323061aSAndrew Lunn return 0; 10671323061aSAndrew Lunn 10681323061aSAndrew Lunn case hwmon_power_max: 10691323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10701323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10711323061aSAndrew Lunn return 0; 10721323061aSAndrew Lunn 10731323061aSAndrew Lunn case hwmon_power_crit: 10741323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10751323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10761323061aSAndrew Lunn return 0; 10771323061aSAndrew Lunn 10781323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10791323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10801323061aSAndrew Lunn if (err < 0) 10811323061aSAndrew Lunn return err; 10821323061aSAndrew Lunn 10831323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10841323061aSAndrew Lunn return 0; 10851323061aSAndrew Lunn 10861323061aSAndrew Lunn case hwmon_power_min_alarm: 10871323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10881323061aSAndrew Lunn if (err < 0) 10891323061aSAndrew Lunn return err; 10901323061aSAndrew Lunn 10911323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 10921323061aSAndrew Lunn return 0; 10931323061aSAndrew Lunn 10941323061aSAndrew Lunn case hwmon_power_max_alarm: 10951323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10961323061aSAndrew Lunn if (err < 0) 10971323061aSAndrew Lunn return err; 10981323061aSAndrew Lunn 10991323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 11001323061aSAndrew Lunn return 0; 11011323061aSAndrew Lunn 11021323061aSAndrew Lunn case hwmon_power_crit_alarm: 11031323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 11041323061aSAndrew Lunn if (err < 0) 11051323061aSAndrew Lunn return err; 11061323061aSAndrew Lunn 11071323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 11081323061aSAndrew Lunn return 0; 11091323061aSAndrew Lunn default: 11101323061aSAndrew Lunn return -EOPNOTSUPP; 11111323061aSAndrew Lunn } 11121323061aSAndrew Lunn 11131323061aSAndrew Lunn return -EOPNOTSUPP; 11141323061aSAndrew Lunn } 11151323061aSAndrew Lunn 11161323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 11171323061aSAndrew Lunn u32 attr, int channel, long *value) 11181323061aSAndrew Lunn { 11191323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 11201323061aSAndrew Lunn 11211323061aSAndrew Lunn switch (type) { 11221323061aSAndrew Lunn case hwmon_temp: 11231323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 11241323061aSAndrew Lunn case hwmon_in: 11251323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 11261323061aSAndrew Lunn case hwmon_curr: 11271323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 11281323061aSAndrew Lunn case hwmon_power: 11291323061aSAndrew Lunn switch (channel) { 11301323061aSAndrew Lunn case 0: 11311323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 11321323061aSAndrew Lunn case 1: 11331323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 11341323061aSAndrew Lunn default: 11351323061aSAndrew Lunn return -EOPNOTSUPP; 11361323061aSAndrew Lunn } 11371323061aSAndrew Lunn default: 11381323061aSAndrew Lunn return -EOPNOTSUPP; 11391323061aSAndrew Lunn } 11401323061aSAndrew Lunn } 11411323061aSAndrew Lunn 1142c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1143c1236979SAndrew Lunn "TX_power", 1144c1236979SAndrew Lunn "RX_power", 1145c1236979SAndrew Lunn }; 1146c1236979SAndrew Lunn 1147c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1148c1236979SAndrew Lunn enum hwmon_sensor_types type, 1149c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1150c1236979SAndrew Lunn { 1151c1236979SAndrew Lunn switch (type) { 1152c1236979SAndrew Lunn case hwmon_curr: 1153c1236979SAndrew Lunn switch (attr) { 1154c1236979SAndrew Lunn case hwmon_curr_label: 1155c1236979SAndrew Lunn *str = "bias"; 1156c1236979SAndrew Lunn return 0; 1157c1236979SAndrew Lunn default: 1158c1236979SAndrew Lunn return -EOPNOTSUPP; 1159c1236979SAndrew Lunn } 1160c1236979SAndrew Lunn break; 1161c1236979SAndrew Lunn case hwmon_temp: 1162c1236979SAndrew Lunn switch (attr) { 1163c1236979SAndrew Lunn case hwmon_temp_label: 1164c1236979SAndrew Lunn *str = "temperature"; 1165c1236979SAndrew Lunn return 0; 1166c1236979SAndrew Lunn default: 1167c1236979SAndrew Lunn return -EOPNOTSUPP; 1168c1236979SAndrew Lunn } 1169c1236979SAndrew Lunn break; 1170c1236979SAndrew Lunn case hwmon_in: 1171c1236979SAndrew Lunn switch (attr) { 1172c1236979SAndrew Lunn case hwmon_in_label: 1173c1236979SAndrew Lunn *str = "VCC"; 1174c1236979SAndrew Lunn return 0; 1175c1236979SAndrew Lunn default: 1176c1236979SAndrew Lunn return -EOPNOTSUPP; 1177c1236979SAndrew Lunn } 1178c1236979SAndrew Lunn break; 1179c1236979SAndrew Lunn case hwmon_power: 1180c1236979SAndrew Lunn switch (attr) { 1181c1236979SAndrew Lunn case hwmon_power_label: 1182c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1183c1236979SAndrew Lunn return 0; 1184c1236979SAndrew Lunn default: 1185c1236979SAndrew Lunn return -EOPNOTSUPP; 1186c1236979SAndrew Lunn } 1187c1236979SAndrew Lunn break; 1188c1236979SAndrew Lunn default: 1189c1236979SAndrew Lunn return -EOPNOTSUPP; 1190c1236979SAndrew Lunn } 1191c1236979SAndrew Lunn 1192c1236979SAndrew Lunn return -EOPNOTSUPP; 1193c1236979SAndrew Lunn } 1194c1236979SAndrew Lunn 11951323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11961323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11971323061aSAndrew Lunn .read = sfp_hwmon_read, 1198c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11991323061aSAndrew Lunn }; 12001323061aSAndrew Lunn 1201815f5f57SBeniamin Sandu static const struct hwmon_channel_info *sfp_hwmon_info[] = { 1202815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(chip, 1203815f5f57SBeniamin Sandu HWMON_C_REGISTER_TZ), 1204815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(in, 12051323061aSAndrew Lunn HWMON_I_INPUT | 12061323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 12071323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 12081323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1209c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1210815f5f57SBeniamin Sandu HWMON_I_LABEL), 1211815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(temp, 1212815f5f57SBeniamin Sandu HWMON_T_INPUT | 1213815f5f57SBeniamin Sandu HWMON_T_MAX | HWMON_T_MIN | 1214815f5f57SBeniamin Sandu HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 1215815f5f57SBeniamin Sandu HWMON_T_CRIT | HWMON_T_LCRIT | 1216815f5f57SBeniamin Sandu HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1217815f5f57SBeniamin Sandu HWMON_T_LABEL), 1218815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(curr, 12191323061aSAndrew Lunn HWMON_C_INPUT | 12201323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 12211323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 12221323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1223c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1224815f5f57SBeniamin Sandu HWMON_C_LABEL), 1225815f5f57SBeniamin Sandu HWMON_CHANNEL_INFO(power, 12261323061aSAndrew Lunn /* Transmit power */ 12271323061aSAndrew Lunn HWMON_P_INPUT | 12281323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12291323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12301323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1231c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1232c1236979SAndrew Lunn HWMON_P_LABEL, 12331323061aSAndrew Lunn /* Receive power */ 12341323061aSAndrew Lunn HWMON_P_INPUT | 12351323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12361323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12371323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1238c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1239815f5f57SBeniamin Sandu HWMON_P_LABEL), 12401323061aSAndrew Lunn NULL, 12411323061aSAndrew Lunn }; 12421323061aSAndrew Lunn 12431323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12441323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12451323061aSAndrew Lunn .info = sfp_hwmon_info, 12461323061aSAndrew Lunn }; 12471323061aSAndrew Lunn 1248139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12491323061aSAndrew Lunn { 1250139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12513f118c44SMichael Walle int err; 12521323061aSAndrew Lunn 1253426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1254426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1255426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1256426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1257426c6cbcSPali Rohár * skip registration of hwmon device. 1258426c6cbcSPali Rohár */ 1259426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1260426c6cbcSPali Rohár dev_info(sfp->dev, 1261426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1262426c6cbcSPali Rohár dev_info(sfp->dev, 1263426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1264426c6cbcSPali Rohár return; 1265426c6cbcSPali Rohár } 1266426c6cbcSPali Rohár 1267139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1268139d3a21SRussell King if (err < 0) { 1269139d3a21SRussell King if (sfp->hwmon_tries--) { 1270139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1271139d3a21SRussell King T_PROBE_RETRY_SLOW); 1272139d3a21SRussell King } else { 12739ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 12749ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1275139d3a21SRussell King } 1276139d3a21SRussell King return; 1277139d3a21SRussell King } 1278139d3a21SRussell King 12793f118c44SMichael Walle sfp->hwmon_name = hwmon_sanitize_name(dev_name(sfp->dev)); 12803f118c44SMichael Walle if (IS_ERR(sfp->hwmon_name)) { 1281139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1282139d3a21SRussell King return; 1283139d3a21SRussell King } 1284139d3a21SRussell King 1285139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1286139d3a21SRussell King sfp->hwmon_name, sfp, 1287139d3a21SRussell King &sfp_hwmon_chip_info, 1288139d3a21SRussell King NULL); 1289139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1290139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1291139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1292139d3a21SRussell King } 1293139d3a21SRussell King 1294139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1295139d3a21SRussell King { 12961323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 12971323061aSAndrew Lunn return 0; 12981323061aSAndrew Lunn 12991323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 13001323061aSAndrew Lunn return 0; 13011323061aSAndrew Lunn 13021323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 13031323061aSAndrew Lunn /* This driver in general does not support address 13041323061aSAndrew Lunn * change. 13051323061aSAndrew Lunn */ 13061323061aSAndrew Lunn return 0; 13071323061aSAndrew Lunn 1308139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1309139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 13101323061aSAndrew Lunn 1311139d3a21SRussell King return 0; 13121323061aSAndrew Lunn } 13131323061aSAndrew Lunn 13141323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13151323061aSAndrew Lunn { 1316139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13173e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13181323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13193e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13201323061aSAndrew Lunn kfree(sfp->hwmon_name); 13211323061aSAndrew Lunn } 13223e322474SAndrew Lunn } 1323139d3a21SRussell King 1324139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1325139d3a21SRussell King { 1326139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1327139d3a21SRussell King 1328139d3a21SRussell King return 0; 1329139d3a21SRussell King } 1330139d3a21SRussell King 1331139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1332139d3a21SRussell King { 1333139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1334139d3a21SRussell King } 13351323061aSAndrew Lunn #else 13361323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13371323061aSAndrew Lunn { 13381323061aSAndrew Lunn return 0; 13391323061aSAndrew Lunn } 13401323061aSAndrew Lunn 13411323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13421323061aSAndrew Lunn { 13431323061aSAndrew Lunn } 1344139d3a21SRussell King 1345139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1346139d3a21SRussell King { 1347139d3a21SRussell King return 0; 1348139d3a21SRussell King } 1349139d3a21SRussell King 1350139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1351139d3a21SRussell King { 1352139d3a21SRussell King } 13531323061aSAndrew Lunn #endif 13541323061aSAndrew Lunn 135573970055SRussell King /* Helpers */ 135673970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 135773970055SRussell King { 135873970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 135973970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 136073970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 136173970055SRussell King sfp_set_state(sfp, sfp->state); 136273970055SRussell King } 136373970055SRussell King 136473970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 136573970055SRussell King { 136673970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 136773970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 136873970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 136973970055SRussell King sfp_set_state(sfp, sfp->state); 137073970055SRussell King } 137173970055SRussell King 13729cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 13739cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 13749cc8976cSRussell King { 13759cc8976cSRussell King struct sfp *sfp = s->private; 13769cc8976cSRussell King 13779cc8976cSRussell King seq_printf(s, "Module state: %s\n", 13789cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 13799cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 13809cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 13819cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 13829cc8976cSRussell King seq_printf(s, "Device state: %s\n", 13839cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 13849cc8976cSRussell King seq_printf(s, "Main state: %s\n", 13859cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 13869cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 13879cc8976cSRussell King sfp->sm_fault_retries); 13889cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 13899cc8976cSRussell King sfp->sm_phy_retries); 13909cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 13919cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 13929cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 13939cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 13949cc8976cSRussell King return 0; 13959cc8976cSRussell King } 13969cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 13979cc8976cSRussell King 13989cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 13999cc8976cSRussell King { 14009cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 14019cc8976cSRussell King 14029cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 14039cc8976cSRussell King &sfp_debug_state_fops); 14049cc8976cSRussell King } 14059cc8976cSRussell King 14069cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14079cc8976cSRussell King { 14089cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 14099cc8976cSRussell King } 14109cc8976cSRussell King #else 14119cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14129cc8976cSRussell King { 14139cc8976cSRussell King } 14149cc8976cSRussell King 14159cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14169cc8976cSRussell King { 14179cc8976cSRussell King } 14189cc8976cSRussell King #endif 14199cc8976cSRussell King 142073970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 142173970055SRussell King { 142273970055SRussell King unsigned int state = sfp->state; 142373970055SRussell King 142473970055SRussell King if (state & SFP_F_TX_DISABLE) 142573970055SRussell King return; 142673970055SRussell King 142773970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 142873970055SRussell King 142973970055SRussell King udelay(T_RESET_US); 143073970055SRussell King 143173970055SRussell King sfp_set_state(sfp, state); 143273970055SRussell King } 143373970055SRussell King 143473970055SRussell King /* SFP state machine */ 143573970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 143673970055SRussell King { 143773970055SRussell King if (timeout) 143873970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 143973970055SRussell King timeout); 144073970055SRussell King else 144173970055SRussell King cancel_delayed_work(&sfp->timeout); 144273970055SRussell King } 144373970055SRussell King 144473970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 144573970055SRussell King unsigned int timeout) 144673970055SRussell King { 144773970055SRussell King sfp->sm_state = state; 144873970055SRussell King sfp_sm_set_timer(sfp, timeout); 144973970055SRussell King } 145073970055SRussell King 14510936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1452516b29edSFlorian Fainelli unsigned int timeout) 145373970055SRussell King { 145473970055SRussell King sfp->sm_mod_state = state; 145573970055SRussell King sfp_sm_set_timer(sfp, timeout); 145673970055SRussell King } 145773970055SRussell King 145873970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 145973970055SRussell King { 146073970055SRussell King sfp_remove_phy(sfp->sfp_bus); 146173970055SRussell King phy_device_remove(sfp->mod_phy); 146273970055SRussell King phy_device_free(sfp->mod_phy); 146373970055SRussell King sfp->mod_phy = NULL; 146473970055SRussell King } 146573970055SRussell King 1466256e43cbSRussell King static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) 146773970055SRussell King { 146873970055SRussell King struct phy_device *phy; 146973970055SRussell King int err; 147073970055SRussell King 14719a484621SRussell King phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); 14721cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 14731cb89a14SRussell King return PTR_ERR(phy); 147420b56ed9SRussell King if (IS_ERR(phy)) { 14759ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "mdiobus scan returned %pe\n", phy); 1476256e43cbSRussell King return PTR_ERR(phy); 147773970055SRussell King } 147873970055SRussell King 14799a484621SRussell King err = phy_device_register(phy); 14809a484621SRussell King if (err) { 14819a484621SRussell King phy_device_free(phy); 14829ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "phy_device_register failed: %pe\n", 14839ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1484256e43cbSRussell King return err; 14859a484621SRussell King } 14869a484621SRussell King 148773970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 148873970055SRussell King if (err) { 148973970055SRussell King phy_device_remove(phy); 149073970055SRussell King phy_device_free(phy); 14919ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "sfp_add_phy failed: %pe\n", ERR_PTR(err)); 1492256e43cbSRussell King return err; 149373970055SRussell King } 149473970055SRussell King 149573970055SRussell King sfp->mod_phy = phy; 1496256e43cbSRussell King 1497256e43cbSRussell King return 0; 149873970055SRussell King } 149973970055SRussell King 150073970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 150173970055SRussell King { 150273970055SRussell King sfp_link_up(sfp->sfp_bus); 150373970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 150473970055SRussell King } 150573970055SRussell King 150673970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 150773970055SRussell King { 150873970055SRussell King sfp_link_down(sfp->sfp_bus); 150973970055SRussell King } 151073970055SRussell King 151173970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 151273970055SRussell King { 1513624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1514624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1515624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1516624407d2SRussell King bool los = false; 151773970055SRussell King 1518710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1519624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1520624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 152173970055SRussell King */ 1522624407d2SRussell King if (los_options == los_inverted) 1523624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1524624407d2SRussell King else if (los_options == los_normal) 1525624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 152673970055SRussell King 152773970055SRussell King if (los) 152873970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 152973970055SRussell King else 153073970055SRussell King sfp_sm_link_up(sfp); 153173970055SRussell King } 153273970055SRussell King 1533710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1534710dfbb0SRussell King { 1535624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1536624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1537624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1538624407d2SRussell King 1539624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1540624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1541710dfbb0SRussell King } 1542710dfbb0SRussell King 1543710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1544710dfbb0SRussell King { 1545624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1546624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1547624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1548624407d2SRussell King 1549624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1550624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1551710dfbb0SRussell King } 1552710dfbb0SRussell King 155363ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 155473970055SRussell King { 1555281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1556516b29edSFlorian Fainelli dev_err(sfp->dev, 1557516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 155873970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 155973970055SRussell King } else { 156073970055SRussell King if (warn) 156173970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 156273970055SRussell King 156363ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 156473970055SRussell King } 156573970055SRussell King } 156673970055SRussell King 15679a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 15689a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 15699a484621SRussell King * or clause 45 PHY. 15709a484621SRussell King * 15719a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 15729a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 15739a484621SRussell King * PHY driver to determine. 15749a484621SRussell King * 15759a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 15769a484621SRussell King * mode according to the negotiated line speed. 15779a484621SRussell King */ 1578256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1579181f29daSRussell King { 1580256e43cbSRussell King int err = 0; 1581256e43cbSRussell King 15829a484621SRussell King switch (sfp->id.base.extended_cc) { 15839a484621SRussell King case SFF8024_ECC_10GBASE_T_SFI: 15849a484621SRussell King case SFF8024_ECC_10GBASE_T_SR: 15859a484621SRussell King case SFF8024_ECC_5GBASE_T: 15869a484621SRussell King case SFF8024_ECC_2_5GBASE_T: 1587256e43cbSRussell King err = sfp_sm_probe_phy(sfp, true); 15889a484621SRussell King break; 15899a484621SRussell King 15909a484621SRussell King default: 1591fa2de660SRussell King if (sfp->id.base.e1000_base_t) 1592256e43cbSRussell King err = sfp_sm_probe_phy(sfp, false); 15939a484621SRussell King break; 15949a484621SRussell King } 1595256e43cbSRussell King return err; 159673970055SRussell King } 159773970055SRussell King 1598ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 15993bb35261SJon Nettleton { 1600ed32abb1SRussell King u32 power_mW = 1000; 16015765cee1SRussell King (Oracle) bool supports_a2; 16023bb35261SJon Nettleton 16033bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1604ed32abb1SRussell King power_mW = 1500; 16053bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1606ed32abb1SRussell King power_mW = 2000; 16073bb35261SJon Nettleton 16085765cee1SRussell King (Oracle) supports_a2 = sfp->id.ext.sff8472_compliance != 16095765cee1SRussell King (Oracle) SFP_SFF8472_COMPLIANCE_NONE || 16105765cee1SRussell King (Oracle) sfp->id.ext.diagmon & SFP_DIAGMON_DDM; 16115765cee1SRussell King (Oracle) 1612ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 16137cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 16145765cee1SRussell King (Oracle) if (!supports_a2) { 16157cfa9c92SRussell King /* The module appears not to implement bus address 16167cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 16177cfa9c92SRussell King * indicated mode. 16187cfa9c92SRussell King */ 16193bb35261SJon Nettleton dev_err(sfp->dev, 16203bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1621ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16223bb35261SJon Nettleton return -EINVAL; 16237cfa9c92SRussell King } else { 16243bb35261SJon Nettleton dev_warn(sfp->dev, 16253bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1626ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16273bb35261SJon Nettleton return 0; 16283bb35261SJon Nettleton } 16297cfa9c92SRussell King } 16307cfa9c92SRussell King 16315765cee1SRussell King (Oracle) if (power_mW <= 1000) { 16325765cee1SRussell King (Oracle) /* Modules below 1W do not require a power change sequence */ 16335765cee1SRussell King (Oracle) sfp->module_power_mW = power_mW; 16345765cee1SRussell King (Oracle) return 0; 16355765cee1SRussell King (Oracle) } 16365765cee1SRussell King (Oracle) 16375765cee1SRussell King (Oracle) if (!supports_a2) { 16385765cee1SRussell King (Oracle) /* The module power level is below the host maximum and the 16395765cee1SRussell King (Oracle) * module appears not to implement bus address 0xa2, so assume 16405765cee1SRussell King (Oracle) * that the module powers up in the indicated mode. 16415765cee1SRussell King (Oracle) */ 16425765cee1SRussell King (Oracle) return 0; 16435765cee1SRussell King (Oracle) } 16445765cee1SRussell King (Oracle) 16457cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 16467cfa9c92SRussell King * an address change sequence, warn the user that the module may 16477cfa9c92SRussell King * not be functional. 16487cfa9c92SRussell King */ 16495765cee1SRussell King (Oracle) if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) { 16507cfa9c92SRussell King dev_warn(sfp->dev, 165107f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 16527cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 16537cfa9c92SRussell King return 0; 16547cfa9c92SRussell King } 16553bb35261SJon Nettleton 1656ed32abb1SRussell King sfp->module_power_mW = power_mW; 1657ed32abb1SRussell King 1658ed32abb1SRussell King return 0; 1659ed32abb1SRussell King } 1660ed32abb1SRussell King 1661b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1662ed32abb1SRussell King { 1663ed32abb1SRussell King u8 val; 1664ed32abb1SRussell King int err; 1665ed32abb1SRussell King 16663bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16673bb35261SJon Nettleton if (err != sizeof(val)) { 16689ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "Failed to read EEPROM: %pe\n", ERR_PTR(err)); 1669b036a554SRussell King return -EAGAIN; 16703bb35261SJon Nettleton } 16713bb35261SJon Nettleton 16729a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 16739a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 16749a484621SRussell King * if the bit is already set, we're already in high power mode. 16759a484621SRussell King */ 16769a484621SRussell King if (!!(val & BIT(0)) == enable) 16779a484621SRussell King return 0; 16789a484621SRussell King 1679b036a554SRussell King if (enable) 16803bb35261SJon Nettleton val |= BIT(0); 1681b036a554SRussell King else 1682b036a554SRussell King val &= ~BIT(0); 16833bb35261SJon Nettleton 16843bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16853bb35261SJon Nettleton if (err != sizeof(val)) { 16869ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "Failed to write EEPROM: %pe\n", 16879ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1688b036a554SRussell King return -EAGAIN; 16893bb35261SJon Nettleton } 16903bb35261SJon Nettleton 1691b036a554SRussell King if (enable) 16923bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1693ed32abb1SRussell King sfp->module_power_mW / 1000, 1694ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 16953bb35261SJon Nettleton 1696b036a554SRussell King return 0; 16973bb35261SJon Nettleton } 16983bb35261SJon Nettleton 1699426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1700426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1701426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1702426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1703426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1704426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1705426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1706426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1707426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1708426c6cbcSPali Rohár * at a time. 17090d035bedSRussell King */ 1710426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 17110d035bedSRussell King { 1712426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 17130d035bedSRussell King 1714426c6cbcSPali Rohár /* Already using byte IO */ 1715426c6cbcSPali Rohár if (block_size == 1) 1716426c6cbcSPali Rohár return false; 1717426c6cbcSPali Rohár 1718426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1719426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1720426c6cbcSPali Rohár return false; 17210d035bedSRussell King } 1722426c6cbcSPali Rohár return true; 17230d035bedSRussell King } 17240d035bedSRussell King 1725b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1726b18432c5SChris Healy { 1727b18432c5SChris Healy u8 check; 1728b18432c5SChris Healy int err; 1729b18432c5SChris Healy 1730b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1731b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1732b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1733b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1734b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1735b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1736b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1737b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1738b18432c5SChris Healy if (err != 3) { 17399ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 17409ae1ef4bSRussell King (Oracle) "Failed to rewrite module EEPROM: %pe\n", 17419ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1742b18432c5SChris Healy return err; 1743b18432c5SChris Healy } 1744b18432c5SChris Healy 1745b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1746b18432c5SChris Healy mdelay(50); 1747b18432c5SChris Healy 1748b18432c5SChris Healy /* Update base structure checksum */ 1749b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1750b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1751b18432c5SChris Healy if (err != 1) { 17529ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 17539ae1ef4bSRussell King (Oracle) "Failed to update base structure checksum in fiber module EEPROM: %pe\n", 17549ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 1755b18432c5SChris Healy return err; 1756b18432c5SChris Healy } 1757b18432c5SChris Healy } 1758b18432c5SChris Healy return 0; 1759b18432c5SChris Healy } 1760b18432c5SChris Healy 1761e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 176273970055SRussell King { 176373970055SRussell King /* SFP module inserted - read I2C data */ 176473970055SRussell King struct sfp_eeprom_id id; 1765b18432c5SChris Healy bool cotsworks_sfbg; 1766981f1f80SRussell King bool cotsworks; 176773970055SRussell King u8 check; 17683bb35261SJon Nettleton int ret; 176973970055SRussell King 1770426c6cbcSPali Rohár /* Some SFP modules and also some Linux I2C drivers do not like reads 1771426c6cbcSPali Rohár * longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at 1772426c6cbcSPali Rohár * a time. 17730d035bedSRussell King */ 1774426c6cbcSPali Rohár sfp->i2c_block_size = 16; 17750d035bedSRussell King 17760d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 17773bb35261SJon Nettleton if (ret < 0) { 1778e117be74SRussell King if (report) 17799ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 17809ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 178173970055SRussell King return -EAGAIN; 178273970055SRussell King } 178373970055SRussell King 17840d035bedSRussell King if (ret != sizeof(id.base)) { 17859ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 178673970055SRussell King return -EAGAIN; 178773970055SRussell King } 178873970055SRussell King 1789426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1790426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1791426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1792426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1793426c6cbcSPali Rohár * is really required and we have no other option. 1794426c6cbcSPali Rohár */ 1795426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1796426c6cbcSPali Rohár dev_info(sfp->dev, 1797426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1798426c6cbcSPali Rohár dev_info(sfp->dev, 1799426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1800426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1801426c6cbcSPali Rohár 1802426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1803426c6cbcSPali Rohár if (ret < 0) { 1804426c6cbcSPali Rohár if (report) 18059ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, 18069ae1ef4bSRussell King (Oracle) "failed to read EEPROM: %pe\n", 18079ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1808426c6cbcSPali Rohár return -EAGAIN; 1809426c6cbcSPali Rohár } 1810426c6cbcSPali Rohár 1811426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 18129ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", 18139ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 1814426c6cbcSPali Rohár return -EAGAIN; 1815426c6cbcSPali Rohár } 1816426c6cbcSPali Rohár } 1817426c6cbcSPali Rohár 1818981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1819981f1f80SRussell King * do the final programming with the final module part number, 1820981f1f80SRussell King * serial number and date code. 1821981f1f80SRussell King */ 1822981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1823b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1824b18432c5SChris Healy 1825b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1826b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1827b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1828b18432c5SChris Healy */ 1829b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1830b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1831b18432c5SChris Healy if (ret < 0) 1832b18432c5SChris Healy return ret; 1833b18432c5SChris Healy } 1834981f1f80SRussell King 183573970055SRussell King /* Validate the checksum over the base structure */ 183673970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 183773970055SRussell King if (check != id.base.cc_base) { 1838981f1f80SRussell King if (cotsworks) { 1839981f1f80SRussell King dev_warn(sfp->dev, 1840981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1841981f1f80SRussell King check, id.base.cc_base); 1842981f1f80SRussell King } else { 184373970055SRussell King dev_err(sfp->dev, 1844981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1845981f1f80SRussell King check, id.base.cc_base); 184673970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1847981f1f80SRussell King 16, 1, &id, sizeof(id), true); 184873970055SRussell King return -EINVAL; 184973970055SRussell King } 1850981f1f80SRussell King } 185173970055SRussell King 18520d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 18530d035bedSRussell King if (ret < 0) { 18540d035bedSRussell King if (report) 18559ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "failed to read EEPROM: %pe\n", 18569ae1ef4bSRussell King (Oracle) ERR_PTR(ret)); 18570d035bedSRussell King return -EAGAIN; 18580d035bedSRussell King } 18590d035bedSRussell King 18600d035bedSRussell King if (ret != sizeof(id.ext)) { 18619ae1ef4bSRussell King (Oracle) dev_err(sfp->dev, "EEPROM short read: %pe\n", ERR_PTR(ret)); 18620d035bedSRussell King return -EAGAIN; 18630d035bedSRussell King } 18640d035bedSRussell King 186573970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 186673970055SRussell King if (check != id.ext.cc_ext) { 1867981f1f80SRussell King if (cotsworks) { 1868981f1f80SRussell King dev_warn(sfp->dev, 1869981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1870981f1f80SRussell King check, id.ext.cc_ext); 1871981f1f80SRussell King } else { 187273970055SRussell King dev_err(sfp->dev, 1873981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1874981f1f80SRussell King check, id.ext.cc_ext); 1875981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1876981f1f80SRussell King 16, 1, &id, sizeof(id), true); 187773970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 187873970055SRussell King } 1879981f1f80SRussell King } 188073970055SRussell King 188173970055SRussell King sfp->id = id; 188273970055SRussell King 1883a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1884a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1885a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1886a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1887a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1888a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 188973970055SRussell King 1890259c8618SRussell King /* Check whether we support this module */ 1891f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1892259c8618SRussell King dev_err(sfp->dev, 1893259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 189473970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 189573970055SRussell King return -EINVAL; 189673970055SRussell King } 189773970055SRussell King 1898ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1899ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1900ec7681bdSRussell King dev_warn(sfp->dev, 1901ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1902ec7681bdSRussell King 1903ed32abb1SRussell King /* Parse the module power requirement */ 1904ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1905ed32abb1SRussell King if (ret < 0) 1906ed32abb1SRussell King return ret; 1907ed32abb1SRussell King 1908*8475c4b7SRussell King (Oracle) /* Initialise state bits to use from hardware */ 1909*8475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 1910*8475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_DISABLE]) 1911*8475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_DISABLE; 1912*8475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_TX_FAULT]) 1913*8475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_TX_FAULT; 1914*8475c4b7SRussell King (Oracle) if (sfp->gpio[GPIO_LOS]) 1915*8475c4b7SRussell King (Oracle) sfp->state_hw_mask |= SFP_F_LOS; 1916*8475c4b7SRussell King (Oracle) 191726c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 191826c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 191926c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 192026c97a2dSRussell King else 192126c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 192226c97a2dSRussell King 19232069624dSMatthew Hagan if (!memcmp(id.base.vendor_name, "HUAWEI ", 16) && 19242069624dSMatthew Hagan !memcmp(id.base.vendor_pn, "MA5671A ", 16)) 19252069624dSMatthew Hagan sfp->tx_fault_ignore = true; 19262069624dSMatthew Hagan else 19272069624dSMatthew Hagan sfp->tx_fault_ignore = false; 19282069624dSMatthew Hagan 1929b036a554SRussell King return 0; 193073970055SRussell King } 193173970055SRussell King 193273970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 193373970055SRussell King { 193473f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 193573970055SRussell King sfp_module_remove(sfp->sfp_bus); 193673970055SRussell King 19371323061aSAndrew Lunn sfp_hwmon_remove(sfp); 19381323061aSAndrew Lunn 193973970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1940ed32abb1SRussell King sfp->module_power_mW = 0; 194173970055SRussell King 194273970055SRussell King dev_info(sfp->dev, "module removed\n"); 194373970055SRussell King } 194473970055SRussell King 19456b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1946e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 194773970055SRussell King { 1948e85d81a1SRussell King switch (sfp->sm_dev_state) { 1949e85d81a1SRussell King default: 19506b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 19516b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 19526b0da5c9SRussell King break; 19536b0da5c9SRussell King 19546b0da5c9SRussell King case SFP_DEV_DOWN: 19556b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 19566b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 19576b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1958e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1959e85d81a1SRussell King break; 196073970055SRussell King 1961e85d81a1SRussell King case SFP_DEV_UP: 19626b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 19636b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 19646b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1965e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1966e85d81a1SRussell King break; 1967e85d81a1SRussell King } 1968e85d81a1SRussell King } 196973970055SRussell King 1970d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1971d900954fSRussell King * the on-board EEPROM, and sets up the power level. 197273970055SRussell King */ 1973e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1974e85d81a1SRussell King { 1975b036a554SRussell King int err; 1976b036a554SRussell King 1977b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1978b036a554SRussell King if (event == SFP_E_REMOVE) { 1979d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1980d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1981b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1982b036a554SRussell King return; 1983b036a554SRussell King } 1984b036a554SRussell King 1985b036a554SRussell King /* Handle device detach globally */ 198673f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 198773f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1988b036a554SRussell King if (sfp->module_power_mW > 1000 && 1989b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1990b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 199173f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1992d2e816c0SRussell King return; 1993d2e816c0SRussell King } 1994d2e816c0SRussell King 199573970055SRussell King switch (sfp->sm_mod_state) { 199673970055SRussell King default: 1997e117be74SRussell King if (event == SFP_E_INSERT) { 1998d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 1999e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 2000e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 2001e117be74SRussell King } 200273970055SRussell King break; 200373970055SRussell King 200473970055SRussell King case SFP_MOD_PROBE: 200573f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 2006b036a554SRussell King if (event != SFP_E_TIMEOUT) 2007b036a554SRussell King break; 200873970055SRussell King 2009e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 2010b036a554SRussell King if (err == -EAGAIN) { 2011e117be74SRussell King if (sfp->sm_mod_tries_init && 2012e117be74SRussell King --sfp->sm_mod_tries_init) { 2013e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2014b036a554SRussell King break; 2015e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2016e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2017e117be74SRussell King dev_warn(sfp->dev, 2018e117be74SRussell King "please wait, module slow to respond\n"); 2019e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2020e117be74SRussell King break; 2021e117be74SRussell King } 2022b036a554SRussell King } 2023b036a554SRussell King if (err < 0) { 2024b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2025b036a554SRussell King break; 2026b036a554SRussell King } 2027b036a554SRussell King 202838ecd706SRussell King err = sfp_hwmon_insert(sfp); 202938ecd706SRussell King if (err) 20309ae1ef4bSRussell King (Oracle) dev_warn(sfp->dev, "hwmon probe failed: %pe\n", 20319ae1ef4bSRussell King (Oracle) ERR_PTR(err)); 203238ecd706SRussell King 203373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2034df561f66SGustavo A. R. Silva fallthrough; 203573f5e847SRussell King case SFP_MOD_WAITDEV: 203673f5e847SRussell King /* Ensure that the device is attached before proceeding */ 203773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 203873f5e847SRussell King break; 203973f5e847SRussell King 204073f5e847SRussell King /* Report the module insertion to the upstream device */ 204173f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 204273f5e847SRussell King if (err < 0) { 204373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 204473f5e847SRussell King break; 204573f5e847SRussell King } 204673f5e847SRussell King 2047b036a554SRussell King /* If this is a power level 1 module, we are done */ 2048b036a554SRussell King if (sfp->module_power_mW <= 1000) 2049b036a554SRussell King goto insert; 2050b036a554SRussell King 2051b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2052df561f66SGustavo A. R. Silva fallthrough; 2053b036a554SRussell King case SFP_MOD_HPOWER: 2054b036a554SRussell King /* Enable high power mode */ 2055b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 205673f5e847SRussell King if (err < 0) { 205773f5e847SRussell King if (err != -EAGAIN) { 205873f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 20590936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 206073f5e847SRussell King } else { 2061e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 206273f5e847SRussell King } 206373f5e847SRussell King break; 206473f5e847SRussell King } 206573f5e847SRussell King 206673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 206773970055SRussell King break; 206873970055SRussell King 2069b036a554SRussell King case SFP_MOD_WAITPWR: 2070b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2071b036a554SRussell King if (event != SFP_E_TIMEOUT) 2072b036a554SRussell King break; 2073b036a554SRussell King 2074b036a554SRussell King insert: 20750936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 20763bb35261SJon Nettleton break; 2077b036a554SRussell King 207873970055SRussell King case SFP_MOD_PRESENT: 207973970055SRussell King case SFP_MOD_ERROR: 208073970055SRussell King break; 208173970055SRussell King } 208273970055SRussell King } 208373970055SRussell King 2084e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2085e85d81a1SRussell King { 2086eefa6f1fSRussell King unsigned long timeout; 20871cb89a14SRussell King int ret; 2088eefa6f1fSRussell King 208973970055SRussell King /* Some events are global */ 209073970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 209173970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 209273970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 209373970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 209473970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 209573970055SRussell King sfp_sm_link_down(sfp); 209674c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 209774c551caSRussell King sfp_module_stop(sfp->sfp_bus); 209873970055SRussell King if (sfp->mod_phy) 209973970055SRussell King sfp_sm_phy_detach(sfp); 21001539e0d3SRussell King sfp_module_tx_disable(sfp); 2101f3c9a666SRussell King sfp_soft_stop_poll(sfp); 210273970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 210373970055SRussell King return; 210473970055SRussell King } 210573970055SRussell King 210673970055SRussell King /* The main state machine */ 210773970055SRussell King switch (sfp->sm_state) { 210873970055SRussell King case SFP_S_DOWN: 2109eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2110eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2111eefa6f1fSRussell King break; 2112eefa6f1fSRussell King 2113f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2114f3c9a666SRussell King sfp_soft_start_poll(sfp); 2115f3c9a666SRussell King 2116f3c9a666SRussell King sfp_module_tx_enable(sfp); 2117eefa6f1fSRussell King 2118eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2119281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2120eefa6f1fSRussell King 2121eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2122eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2123eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 2124eefa6f1fSRussell King */ 2125eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 2126eefa6f1fSRussell King break; 2127eefa6f1fSRussell King 2128eefa6f1fSRussell King case SFP_S_WAIT: 2129eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2130eefa6f1fSRussell King break; 2131eefa6f1fSRussell King 2132eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 213326c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 213426c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 213526c97a2dSRussell King * initialise, which is indicated by TX_FAULT 213626c97a2dSRussell King * deasserting. 2137181f29daSRussell King */ 213826c97a2dSRussell King timeout = sfp->module_t_start_up; 2139eefa6f1fSRussell King if (timeout > T_WAIT) 2140eefa6f1fSRussell King timeout -= T_WAIT; 2141eefa6f1fSRussell King else 2142eefa6f1fSRussell King timeout = 1; 2143eefa6f1fSRussell King 2144eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2145eefa6f1fSRussell King } else { 2146eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2147eefa6f1fSRussell King * finished initialising. 2148eefa6f1fSRussell King */ 2149eefa6f1fSRussell King goto init_done; 2150181f29daSRussell King } 215173970055SRussell King break; 215273970055SRussell King 215373970055SRussell King case SFP_S_INIT: 2154d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 2155e1f82127SWenpeng Liang /* TX_FAULT is still asserted after t_init 215626c97a2dSRussell King * or t_start_up, so assume there is a fault. 2157d23751a0SRussell King */ 2158d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2159281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2160d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 21611cb89a14SRussell King init_done: 21621cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 21631cb89a14SRussell King goto phy_probe; 21641cb89a14SRussell King } 21651cb89a14SRussell King break; 21661cb89a14SRussell King 21671cb89a14SRussell King case SFP_S_INIT_PHY: 21681cb89a14SRussell King if (event != SFP_E_TIMEOUT) 21691cb89a14SRussell King break; 21701cb89a14SRussell King phy_probe: 21711cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2172d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2173d23751a0SRussell King */ 21741cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 21751cb89a14SRussell King if (ret == -ENODEV) { 21761cb89a14SRussell King if (--sfp->sm_phy_retries) { 21771cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 21781cb89a14SRussell King break; 21791cb89a14SRussell King } else { 21801cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 21811cb89a14SRussell King } 21821cb89a14SRussell King } else if (ret) { 2183256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2184256e43cbSRussell King break; 2185256e43cbSRussell King } 218674c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 218774c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 218874c551caSRussell King break; 218974c551caSRussell King } 2190d23751a0SRussell King sfp_sm_link_check_los(sfp); 2191d23751a0SRussell King 2192d23751a0SRussell King /* Reset the fault retry count */ 2193281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2194d23751a0SRussell King break; 2195d23751a0SRussell King 2196d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2197d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2198d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 219926c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2200d23751a0SRussell King } 220173970055SRussell King break; 220273970055SRussell King 220373970055SRussell King case SFP_S_WAIT_LOS: 220473970055SRussell King if (event == SFP_E_TX_FAULT) 220563ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2206710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 220773970055SRussell King sfp_sm_link_up(sfp); 220873970055SRussell King break; 220973970055SRussell King 221073970055SRussell King case SFP_S_LINK_UP: 221173970055SRussell King if (event == SFP_E_TX_FAULT) { 221273970055SRussell King sfp_sm_link_down(sfp); 221363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2214710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 221573970055SRussell King sfp_sm_link_down(sfp); 221673970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 221773970055SRussell King } 221873970055SRussell King break; 221973970055SRussell King 222073970055SRussell King case SFP_S_TX_FAULT: 222173970055SRussell King if (event == SFP_E_TIMEOUT) { 222273970055SRussell King sfp_module_tx_fault_reset(sfp); 222326c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 222473970055SRussell King } 222573970055SRussell King break; 222673970055SRussell King 222773970055SRussell King case SFP_S_REINIT: 222873970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 222963ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 223073970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 223173970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 223273970055SRussell King sfp_sm_link_check_los(sfp); 223373970055SRussell King } 223473970055SRussell King break; 223573970055SRussell King 223673970055SRussell King case SFP_S_TX_DISABLE: 223773970055SRussell King break; 223873970055SRussell King } 2239e85d81a1SRussell King } 2240e85d81a1SRussell King 2241e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2242e85d81a1SRussell King { 2243e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2244e85d81a1SRussell King 2245e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2246e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2247e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2248e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2249e85d81a1SRussell King event_to_str(event)); 2250e85d81a1SRussell King 2251e85d81a1SRussell King sfp_sm_device(sfp, event); 22526b0da5c9SRussell King sfp_sm_module(sfp, event); 2253e85d81a1SRussell King sfp_sm_main(sfp, event); 225473970055SRussell King 22554005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 22564005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 22574005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 22584005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 225973970055SRussell King 226073970055SRussell King mutex_unlock(&sfp->sm_mutex); 226173970055SRussell King } 226273970055SRussell King 2263b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2264b5bfc21aSRussell King { 22656b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2266b5bfc21aSRussell King } 2267b5bfc21aSRussell King 2268b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2269b5bfc21aSRussell King { 22706b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2271b5bfc21aSRussell King } 2272b5bfc21aSRussell King 227373970055SRussell King static void sfp_start(struct sfp *sfp) 227473970055SRussell King { 227573970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 227673970055SRussell King } 227773970055SRussell King 227873970055SRussell King static void sfp_stop(struct sfp *sfp) 227973970055SRussell King { 228073970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 228173970055SRussell King } 228273970055SRussell King 228373970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 228473970055SRussell King { 228573970055SRussell King /* locking... and check module is present */ 228673970055SRussell King 2287ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2288ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 228973970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 229073970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 229173970055SRussell King } else { 229273970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 229373970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 229473970055SRussell King } 229573970055SRussell King return 0; 229673970055SRussell King } 229773970055SRussell King 229873970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 229973970055SRussell King u8 *data) 230073970055SRussell King { 230173970055SRussell King unsigned int first, last, len; 230273970055SRussell King int ret; 230373970055SRussell King 230473970055SRussell King if (ee->len == 0) 230573970055SRussell King return -EINVAL; 230673970055SRussell King 230773970055SRussell King first = ee->offset; 230873970055SRussell King last = ee->offset + ee->len; 230973970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 231073970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 231173970055SRussell King len -= first; 231273970055SRussell King 23132794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 231473970055SRussell King if (ret < 0) 231573970055SRussell King return ret; 231673970055SRussell King 231773970055SRussell King first += len; 231873970055SRussell King data += len; 231973970055SRussell King } 23202794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 232173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 232273970055SRussell King len -= first; 232373970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 232473970055SRussell King 23252794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 232673970055SRussell King if (ret < 0) 232773970055SRussell King return ret; 232873970055SRussell King } 232973970055SRussell King return 0; 233073970055SRussell King } 233173970055SRussell King 2332d740513fSAndrew Lunn static int sfp_module_eeprom_by_page(struct sfp *sfp, 2333d740513fSAndrew Lunn const struct ethtool_module_eeprom *page, 2334d740513fSAndrew Lunn struct netlink_ext_ack *extack) 2335d740513fSAndrew Lunn { 2336d740513fSAndrew Lunn if (page->bank) { 2337d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Banks not supported"); 2338d740513fSAndrew Lunn return -EOPNOTSUPP; 2339d740513fSAndrew Lunn } 2340d740513fSAndrew Lunn 2341d740513fSAndrew Lunn if (page->page) { 2342d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only page 0 supported"); 2343d740513fSAndrew Lunn return -EOPNOTSUPP; 2344d740513fSAndrew Lunn } 2345d740513fSAndrew Lunn 2346d740513fSAndrew Lunn if (page->i2c_address != 0x50 && 2347d740513fSAndrew Lunn page->i2c_address != 0x51) { 2348d740513fSAndrew Lunn NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); 2349d740513fSAndrew Lunn return -EOPNOTSUPP; 2350d740513fSAndrew Lunn } 2351d740513fSAndrew Lunn 2352d740513fSAndrew Lunn return sfp_read(sfp, page->i2c_address == 0x51, page->offset, 2353d740513fSAndrew Lunn page->data, page->length); 2354d740513fSAndrew Lunn }; 2355d740513fSAndrew Lunn 235673970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2357b5bfc21aSRussell King .attach = sfp_attach, 2358b5bfc21aSRussell King .detach = sfp_detach, 235973970055SRussell King .start = sfp_start, 236073970055SRussell King .stop = sfp_stop, 236173970055SRussell King .module_info = sfp_module_info, 236273970055SRussell King .module_eeprom = sfp_module_eeprom, 2363d740513fSAndrew Lunn .module_eeprom_by_page = sfp_module_eeprom_by_page, 236473970055SRussell King }; 236573970055SRussell King 236673970055SRussell King static void sfp_timeout(struct work_struct *work) 236773970055SRussell King { 236873970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 236973970055SRussell King 237073970055SRussell King rtnl_lock(); 237173970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 237273970055SRussell King rtnl_unlock(); 237373970055SRussell King } 237473970055SRussell King 237573970055SRussell King static void sfp_check_state(struct sfp *sfp) 237673970055SRussell King { 237773970055SRussell King unsigned int state, i, changed; 237873970055SRussell King 23792158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 238073970055SRussell King state = sfp_get_state(sfp); 238173970055SRussell King changed = state ^ sfp->state; 23822069624dSMatthew Hagan if (sfp->tx_fault_ignore) 23832069624dSMatthew Hagan changed &= SFP_F_PRESENT | SFP_F_LOS; 23842069624dSMatthew Hagan else 238573970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 238673970055SRussell King 238773970055SRussell King for (i = 0; i < GPIO_MAX; i++) 238873970055SRussell King if (changed & BIT(i)) 238973970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 239073970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 239173970055SRussell King 239273970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 239373970055SRussell King sfp->state = state; 239473970055SRussell King 239573970055SRussell King rtnl_lock(); 239673970055SRussell King if (changed & SFP_F_PRESENT) 239773970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 239873970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 239973970055SRussell King 240073970055SRussell King if (changed & SFP_F_TX_FAULT) 240173970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 240273970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 240373970055SRussell King 240473970055SRussell King if (changed & SFP_F_LOS) 240573970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 240673970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 240773970055SRussell King rtnl_unlock(); 24082158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 240973970055SRussell King } 241073970055SRussell King 241173970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 241273970055SRussell King { 241373970055SRussell King struct sfp *sfp = data; 241473970055SRussell King 241573970055SRussell King sfp_check_state(sfp); 241673970055SRussell King 241773970055SRussell King return IRQ_HANDLED; 241873970055SRussell King } 241973970055SRussell King 242073970055SRussell King static void sfp_poll(struct work_struct *work) 242173970055SRussell King { 242273970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 242373970055SRussell King 242473970055SRussell King sfp_check_state(sfp); 2425f3c9a666SRussell King 2426f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2427f3c9a666SRussell King sfp->need_poll) 242873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 242973970055SRussell King } 243073970055SRussell King 243173970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 243273970055SRussell King { 243373970055SRussell King struct sfp *sfp; 243473970055SRussell King 243573970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 243673970055SRussell King if (!sfp) 243773970055SRussell King return ERR_PTR(-ENOMEM); 243873970055SRussell King 243973970055SRussell King sfp->dev = dev; 244073970055SRussell King 244173970055SRussell King mutex_init(&sfp->sm_mutex); 24422158e856SRobert Hancock mutex_init(&sfp->st_mutex); 244373970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 244473970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 244573970055SRussell King 2446139d3a21SRussell King sfp_hwmon_init(sfp); 2447139d3a21SRussell King 244873970055SRussell King return sfp; 244973970055SRussell King } 245073970055SRussell King 245173970055SRussell King static void sfp_cleanup(void *data) 245273970055SRussell King { 245373970055SRussell King struct sfp *sfp = data; 245473970055SRussell King 2455139d3a21SRussell King sfp_hwmon_exit(sfp); 2456139d3a21SRussell King 245773970055SRussell King cancel_delayed_work_sync(&sfp->poll); 245873970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 245973970055SRussell King if (sfp->i2c_mii) { 246073970055SRussell King mdiobus_unregister(sfp->i2c_mii); 246173970055SRussell King mdiobus_free(sfp->i2c_mii); 246273970055SRussell King } 246373970055SRussell King if (sfp->i2c) 246473970055SRussell King i2c_put_adapter(sfp->i2c); 246573970055SRussell King kfree(sfp); 246673970055SRussell King } 246773970055SRussell King 246873970055SRussell King static int sfp_probe(struct platform_device *pdev) 246973970055SRussell King { 2470259c8618SRussell King const struct sff_data *sff; 24717ce236faSRuslan Babayev struct i2c_adapter *i2c; 24725411ca71SChris Healy char *sfp_irq_name; 247373970055SRussell King struct sfp *sfp; 2474257c2559SRobert Hancock int err, i; 247573970055SRussell King 247673970055SRussell King sfp = sfp_alloc(&pdev->dev); 247773970055SRussell King if (IS_ERR(sfp)) 247873970055SRussell King return PTR_ERR(sfp); 247973970055SRussell King 248073970055SRussell King platform_set_drvdata(pdev, sfp); 248173970055SRussell King 24820a18d802SJianglei Nie err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp); 248373970055SRussell King if (err < 0) 248473970055SRussell King return err; 248573970055SRussell King 2486259c8618SRussell King sff = sfp->type = &sfp_data; 2487259c8618SRussell King 248873970055SRussell King if (pdev->dev.of_node) { 248973970055SRussell King struct device_node *node = pdev->dev.of_node; 2490259c8618SRussell King const struct of_device_id *id; 249173970055SRussell King struct device_node *np; 249273970055SRussell King 2493259c8618SRussell King id = of_match_node(sfp_of_match, node); 2494259c8618SRussell King if (WARN_ON(!id)) 2495259c8618SRussell King return -EINVAL; 2496259c8618SRussell King 2497259c8618SRussell King sff = sfp->type = id->data; 2498259c8618SRussell King 249973970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 250066ede1f9SAntoine Tenart if (!np) { 250166ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 250266ede1f9SAntoine Tenart return -ENODEV; 250366ede1f9SAntoine Tenart } 250473970055SRussell King 250573970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 250673970055SRussell King of_node_put(np); 25077ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 25087ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 25097ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 25107ce236faSRuslan Babayev struct fwnode_reference_args args; 25117ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 25127ce236faSRuslan Babayev int ret; 25137ce236faSRuslan Babayev 25147ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 25151086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 25167ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 25177ce236faSRuslan Babayev return -ENODEV; 25187ce236faSRuslan Babayev } 25197ce236faSRuslan Babayev 25207ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 25217ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 25227ce236faSRuslan Babayev } else { 25237ce236faSRuslan Babayev return -EINVAL; 25247ce236faSRuslan Babayev } 25257ce236faSRuslan Babayev 252673970055SRussell King if (!i2c) 252773970055SRussell King return -EPROBE_DEFER; 252873970055SRussell King 252973970055SRussell King err = sfp_i2c_configure(sfp, i2c); 253073970055SRussell King if (err < 0) { 253173970055SRussell King i2c_put_adapter(i2c); 253273970055SRussell King return err; 253373970055SRussell King } 253473970055SRussell King 2535259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2536259c8618SRussell King if (sff->gpios & BIT(i)) { 253773970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 253873970055SRussell King gpio_of_names[i], gpio_flags[i]); 253973970055SRussell King if (IS_ERR(sfp->gpio[i])) 254073970055SRussell King return PTR_ERR(sfp->gpio[i]); 254173970055SRussell King } 254273970055SRussell King 2543*8475c4b7SRussell King (Oracle) sfp->state_hw_mask = SFP_F_PRESENT; 2544*8475c4b7SRussell King (Oracle) 254573970055SRussell King sfp->get_state = sfp_gpio_get_state; 254673970055SRussell King sfp->set_state = sfp_gpio_set_state; 2547259c8618SRussell King 2548259c8618SRussell King /* Modules that have no detect signal are always present */ 2549259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2550259c8618SRussell King sfp->get_state = sff_gpio_get_state; 255173970055SRussell King 25523bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 25533bb35261SJon Nettleton &sfp->max_power_mW); 25543bb35261SJon Nettleton if (!sfp->max_power_mW) 25553bb35261SJon Nettleton sfp->max_power_mW = 1000; 25563bb35261SJon Nettleton 25573bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 25583bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 25593bb35261SJon Nettleton 256073970055SRussell King /* Get the initial state, and always signal TX disable, 256173970055SRussell King * since the network interface will not be up. 256273970055SRussell King */ 256373970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 256473970055SRussell King 256573970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 256673970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 256773970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 256873970055SRussell King sfp_set_state(sfp, sfp->state); 256973970055SRussell King sfp_module_tx_disable(sfp); 257073f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 257173f5e847SRussell King rtnl_lock(); 257273f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 257373f5e847SRussell King rtnl_unlock(); 257473f5e847SRussell King } 257573970055SRussell King 257673970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 257773970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 257873970055SRussell King continue; 257973970055SRussell King 2580257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 258196216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 258296216181SYueHaibing sfp->gpio_irq[i] = 0; 2583f3c9a666SRussell King sfp->need_poll = true; 258473970055SRussell King continue; 258573970055SRussell King } 258673970055SRussell King 25875411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 25885411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 25895411ca71SChris Healy gpio_of_names[i]); 25905411ca71SChris Healy 25918cb601f1SChris Healy if (!sfp_irq_name) 25928cb601f1SChris Healy return -ENOMEM; 25938cb601f1SChris Healy 2594257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2595257c2559SRobert Hancock NULL, sfp_irq, 259673970055SRussell King IRQF_ONESHOT | 259773970055SRussell King IRQF_TRIGGER_RISING | 259873970055SRussell King IRQF_TRIGGER_FALLING, 25995411ca71SChris Healy sfp_irq_name, sfp); 2600257c2559SRobert Hancock if (err) { 2601257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2602f3c9a666SRussell King sfp->need_poll = true; 260373970055SRussell King } 2604257c2559SRobert Hancock } 260573970055SRussell King 2606f3c9a666SRussell King if (sfp->need_poll) 260773970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 260873970055SRussell King 2609a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2610a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2611a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2612a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2613a1f5d1f0SAntoine Tenart */ 2614a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2615a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2616a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2617a1f5d1f0SAntoine Tenart 2618b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2619b5bfc21aSRussell King if (!sfp->sfp_bus) 2620b5bfc21aSRussell King return -ENOMEM; 2621b5bfc21aSRussell King 26229cc8976cSRussell King sfp_debugfs_init(sfp); 26239cc8976cSRussell King 262473970055SRussell King return 0; 262573970055SRussell King } 262673970055SRussell King 262773970055SRussell King static int sfp_remove(struct platform_device *pdev) 262873970055SRussell King { 262973970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 263073970055SRussell King 26319cc8976cSRussell King sfp_debugfs_exit(sfp); 263273970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 263373970055SRussell King 26340cb96b57SRussell King rtnl_lock(); 26350cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 26360cb96b57SRussell King rtnl_unlock(); 26370cb96b57SRussell King 263873970055SRussell King return 0; 263973970055SRussell King } 264073970055SRussell King 2641257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2642257c2559SRobert Hancock { 2643257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2644257c2559SRobert Hancock int i; 2645257c2559SRobert Hancock 2646257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2647257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2648257c2559SRobert Hancock continue; 2649257c2559SRobert Hancock 2650257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2651257c2559SRobert Hancock } 2652257c2559SRobert Hancock 2653257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2654257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2655257c2559SRobert Hancock } 2656257c2559SRobert Hancock 265773970055SRussell King static struct platform_driver sfp_driver = { 265873970055SRussell King .probe = sfp_probe, 265973970055SRussell King .remove = sfp_remove, 2660257c2559SRobert Hancock .shutdown = sfp_shutdown, 266173970055SRussell King .driver = { 266273970055SRussell King .name = "sfp", 266373970055SRussell King .of_match_table = sfp_of_match, 266473970055SRussell King }, 266573970055SRussell King }; 266673970055SRussell King 266773970055SRussell King static int sfp_init(void) 266873970055SRussell King { 266973970055SRussell King poll_jiffies = msecs_to_jiffies(100); 267073970055SRussell King 267173970055SRussell King return platform_driver_register(&sfp_driver); 267273970055SRussell King } 267373970055SRussell King module_init(sfp_init); 267473970055SRussell King 267573970055SRussell King static void sfp_exit(void) 267673970055SRussell King { 267773970055SRussell King platform_driver_unregister(&sfp_driver); 267873970055SRussell King } 267973970055SRussell King module_exit(sfp_exit); 268073970055SRussell King 268173970055SRussell King MODULE_ALIAS("platform:sfp"); 268273970055SRussell King MODULE_AUTHOR("Russell King"); 268373970055SRussell King MODULE_LICENSE("GPL v2"); 2684