1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 27ce236faSRuslan Babayev #include <linux/acpi.h> 31323061aSAndrew Lunn #include <linux/ctype.h> 49cc8976cSRussell King #include <linux/debugfs.h> 573970055SRussell King #include <linux/delay.h> 654a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 71323061aSAndrew Lunn #include <linux/hwmon.h> 873970055SRussell King #include <linux/i2c.h> 973970055SRussell King #include <linux/interrupt.h> 1073970055SRussell King #include <linux/jiffies.h> 11fcba68bdSAndrew Lunn #include <linux/mdio/mdio-i2c.h> 1273970055SRussell King #include <linux/module.h> 1373970055SRussell King #include <linux/mutex.h> 1473970055SRussell King #include <linux/of.h> 1573970055SRussell King #include <linux/phy.h> 1673970055SRussell King #include <linux/platform_device.h> 1773970055SRussell King #include <linux/rtnetlink.h> 1873970055SRussell King #include <linux/slab.h> 1973970055SRussell King #include <linux/workqueue.h> 2073970055SRussell King 2173970055SRussell King #include "sfp.h" 2273970055SRussell King #include "swphy.h" 2373970055SRussell King 2473970055SRussell King enum { 2573970055SRussell King GPIO_MODDEF0, 2673970055SRussell King GPIO_LOS, 2773970055SRussell King GPIO_TX_FAULT, 2873970055SRussell King GPIO_TX_DISABLE, 2973970055SRussell King GPIO_RATE_SELECT, 3073970055SRussell King GPIO_MAX, 3173970055SRussell King 3273970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3373970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3473970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3573970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3673970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3773970055SRussell King 3873970055SRussell King SFP_E_INSERT = 0, 3973970055SRussell King SFP_E_REMOVE, 406b0da5c9SRussell King SFP_E_DEV_ATTACH, 416b0da5c9SRussell King SFP_E_DEV_DETACH, 4273970055SRussell King SFP_E_DEV_DOWN, 4373970055SRussell King SFP_E_DEV_UP, 4473970055SRussell King SFP_E_TX_FAULT, 4573970055SRussell King SFP_E_TX_CLEAR, 4673970055SRussell King SFP_E_LOS_HIGH, 4773970055SRussell King SFP_E_LOS_LOW, 4873970055SRussell King SFP_E_TIMEOUT, 4973970055SRussell King 5073970055SRussell King SFP_MOD_EMPTY = 0, 5173f5e847SRussell King SFP_MOD_ERROR, 5273970055SRussell King SFP_MOD_PROBE, 5373f5e847SRussell King SFP_MOD_WAITDEV, 543bb35261SJon Nettleton SFP_MOD_HPOWER, 55b036a554SRussell King SFP_MOD_WAITPWR, 5673970055SRussell King SFP_MOD_PRESENT, 5773970055SRussell King 586b0da5c9SRussell King SFP_DEV_DETACHED = 0, 596b0da5c9SRussell King SFP_DEV_DOWN, 6073970055SRussell King SFP_DEV_UP, 6173970055SRussell King 6273970055SRussell King SFP_S_DOWN = 0, 6374c551caSRussell King SFP_S_FAIL, 64eefa6f1fSRussell King SFP_S_WAIT, 6573970055SRussell King SFP_S_INIT, 661cb89a14SRussell King SFP_S_INIT_PHY, 67d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6873970055SRussell King SFP_S_WAIT_LOS, 6973970055SRussell King SFP_S_LINK_UP, 7073970055SRussell King SFP_S_TX_FAULT, 7173970055SRussell King SFP_S_REINIT, 7273970055SRussell King SFP_S_TX_DISABLE, 7373970055SRussell King }; 7473970055SRussell King 754005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 764005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7773f5e847SRussell King [SFP_MOD_ERROR] = "error", 784005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7973f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 804005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 81b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 824005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 834005a7cbSAndrew Lunn }; 844005a7cbSAndrew Lunn 854005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 864005a7cbSAndrew Lunn { 874005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 884005a7cbSAndrew Lunn return "Unknown module state"; 894005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 904005a7cbSAndrew Lunn } 914005a7cbSAndrew Lunn 924005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 936b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 944005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 954005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 964005a7cbSAndrew Lunn }; 974005a7cbSAndrew Lunn 984005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 994005a7cbSAndrew Lunn { 1004005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 1014005a7cbSAndrew Lunn return "Unknown device state"; 1024005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1034005a7cbSAndrew Lunn } 1044005a7cbSAndrew Lunn 1054005a7cbSAndrew Lunn static const char * const event_strings[] = { 1064005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1074005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1086b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1096b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1104005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1114005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1124005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1134005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1144005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1154005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1164005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1174005a7cbSAndrew Lunn }; 1184005a7cbSAndrew Lunn 1194005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1204005a7cbSAndrew Lunn { 1214005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1224005a7cbSAndrew Lunn return "Unknown event"; 1234005a7cbSAndrew Lunn return event_strings[event]; 1244005a7cbSAndrew Lunn } 1254005a7cbSAndrew Lunn 1264005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1274005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 12874c551caSRussell King [SFP_S_FAIL] = "fail", 129eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1304005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1311cb89a14SRussell King [SFP_S_INIT_PHY] = "init_phy", 132d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1334005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1344005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1354005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1364005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 1374005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_disable", 1384005a7cbSAndrew Lunn }; 1394005a7cbSAndrew Lunn 1404005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1414005a7cbSAndrew Lunn { 1424005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1434005a7cbSAndrew Lunn return "Unknown state"; 1444005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1454005a7cbSAndrew Lunn } 1464005a7cbSAndrew Lunn 14773970055SRussell King static const char *gpio_of_names[] = { 14825ee0793SBaruch Siach "mod-def0", 14973970055SRussell King "los", 15073970055SRussell King "tx-fault", 15173970055SRussell King "tx-disable", 15225ee0793SBaruch Siach "rate-select0", 15373970055SRussell King }; 15473970055SRussell King 15573970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15673970055SRussell King GPIOD_IN, 15773970055SRussell King GPIOD_IN, 15873970055SRussell King GPIOD_IN, 15973970055SRussell King GPIOD_ASIS, 16073970055SRussell King GPIOD_ASIS, 16173970055SRussell King }; 16273970055SRussell King 16326c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16426c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16526c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 16626c97a2dSRussell King * on board (for a copper SFP) time to initialise. 16726c97a2dSRussell King */ 168eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 16926c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 17026c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17126c97a2dSRussell King 17226c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17326c97a2dSRussell King * an indicated TX_FAULT. 17426c97a2dSRussell King */ 17573970055SRussell King #define T_RESET_US 10 17673970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 17773970055SRussell King 17865ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 17965ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 18065ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18165ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18265ef2d5cSRussell King */ 18365ef2d5cSRussell King #define N_FAULT_INIT 5 18465ef2d5cSRussell King #define N_FAULT 5 18565ef2d5cSRussell King 1861cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1871cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1881cb89a14SRussell King */ 1891cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1901cb89a14SRussell King #define R_PHY_RETRY 12 1911cb89a14SRussell King 19273970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19373970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19473970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 19573970055SRussell King * 196d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 197d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 19873970055SRussell King */ 199d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 2003bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 201e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 202e117be74SRussell King #define R_PROBE_RETRY_INIT 10 203e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 204e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 20573970055SRussell King 206516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 20773970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 20873970055SRussell King */ 20973970055SRussell King #define SFP_PHY_ADDR 22 21073970055SRussell King 211259c8618SRussell King struct sff_data { 212259c8618SRussell King unsigned int gpios; 213259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 214259c8618SRussell King }; 215259c8618SRussell King 21673970055SRussell King struct sfp { 21773970055SRussell King struct device *dev; 21873970055SRussell King struct i2c_adapter *i2c; 21973970055SRussell King struct mii_bus *i2c_mii; 22073970055SRussell King struct sfp_bus *sfp_bus; 22173970055SRussell King struct phy_device *mod_phy; 222259c8618SRussell King const struct sff_data *type; 2230d035bedSRussell King size_t i2c_block_size; 2243bb35261SJon Nettleton u32 max_power_mW; 22573970055SRussell King 22673970055SRussell King unsigned int (*get_state)(struct sfp *); 22773970055SRussell King void (*set_state)(struct sfp *, unsigned int); 22873970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2293bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 23073970055SRussell King 23173970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 232257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 23373970055SRussell King 234f3c9a666SRussell King bool need_poll; 235f3c9a666SRussell King 2362158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 237f3c9a666SRussell King unsigned int state_soft_mask; 23873970055SRussell King unsigned int state; 23973970055SRussell King struct delayed_work poll; 24073970055SRussell King struct delayed_work timeout; 2412158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 24273970055SRussell King unsigned char sm_mod_state; 243e117be74SRussell King unsigned char sm_mod_tries_init; 244e117be74SRussell King unsigned char sm_mod_tries; 24573970055SRussell King unsigned char sm_dev_state; 24673970055SRussell King unsigned short sm_state; 247281e4eabSRussell King unsigned char sm_fault_retries; 2481cb89a14SRussell King unsigned char sm_phy_retries; 24973970055SRussell King 25073970055SRussell King struct sfp_eeprom_id id; 251ed32abb1SRussell King unsigned int module_power_mW; 25226c97a2dSRussell King unsigned int module_t_start_up; 253ed32abb1SRussell King 2541323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2551323061aSAndrew Lunn struct sfp_diag diag; 256139d3a21SRussell King struct delayed_work hwmon_probe; 257139d3a21SRussell King unsigned int hwmon_tries; 2581323061aSAndrew Lunn struct device *hwmon_dev; 2591323061aSAndrew Lunn char *hwmon_name; 2601323061aSAndrew Lunn #endif 2611323061aSAndrew Lunn 2629cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 2639cc8976cSRussell King struct dentry *debugfs_dir; 2649cc8976cSRussell King #endif 26573970055SRussell King }; 26673970055SRussell King 267259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 268259c8618SRussell King { 2690fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 270259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 271259c8618SRussell King } 272259c8618SRussell King 273259c8618SRussell King static const struct sff_data sff_data = { 274259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 275259c8618SRussell King .module_supported = sff_module_supported, 276259c8618SRussell King }; 277259c8618SRussell King 278259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 279259c8618SRussell King { 2800fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFP && 281259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 282259c8618SRussell King } 283259c8618SRussell King 284259c8618SRussell King static const struct sff_data sfp_data = { 285259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 286259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 287259c8618SRussell King .module_supported = sfp_module_supported, 288259c8618SRussell King }; 289259c8618SRussell King 290259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 291259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 292259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 293259c8618SRussell King { }, 294259c8618SRussell King }; 295259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 296259c8618SRussell King 29773970055SRussell King static unsigned long poll_jiffies; 29873970055SRussell King 29973970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 30073970055SRussell King { 30173970055SRussell King unsigned int i, state, v; 30273970055SRussell King 30373970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 30473970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 30573970055SRussell King continue; 30673970055SRussell King 30773970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 30873970055SRussell King if (v) 30973970055SRussell King state |= BIT(i); 31073970055SRussell King } 31173970055SRussell King 31273970055SRussell King return state; 31373970055SRussell King } 31473970055SRussell King 315259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 316259c8618SRussell King { 317259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 318259c8618SRussell King } 319259c8618SRussell King 32073970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 32173970055SRussell King { 32273970055SRussell King if (state & SFP_F_PRESENT) { 32373970055SRussell King /* If the module is present, drive the signals */ 32473970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 32573970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 32673970055SRussell King state & SFP_F_TX_DISABLE); 32773970055SRussell King if (state & SFP_F_RATE_SELECT) 32873970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 32973970055SRussell King state & SFP_F_RATE_SELECT); 33073970055SRussell King } else { 33173970055SRussell King /* Otherwise, let them float to the pull-ups */ 33273970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 33373970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 33473970055SRussell King if (state & SFP_F_RATE_SELECT) 33573970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 33673970055SRussell King } 33773970055SRussell King } 33873970055SRussell King 3393bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3403bb35261SJon Nettleton size_t len) 34173970055SRussell King { 34273970055SRussell King struct i2c_msg msgs[2]; 343*426c6cbcSPali Rohár u8 bus_addr = a2 ? 0x51 : 0x50; 344*426c6cbcSPali Rohár size_t block_size = sfp->i2c_block_size; 34528e74a7cSRussell King size_t this_len; 34673970055SRussell King int ret; 34773970055SRussell King 34873970055SRussell King msgs[0].addr = bus_addr; 34973970055SRussell King msgs[0].flags = 0; 35073970055SRussell King msgs[0].len = 1; 35173970055SRussell King msgs[0].buf = &dev_addr; 35273970055SRussell King msgs[1].addr = bus_addr; 35373970055SRussell King msgs[1].flags = I2C_M_RD; 35473970055SRussell King msgs[1].len = len; 35573970055SRussell King msgs[1].buf = buf; 35673970055SRussell King 35728e74a7cSRussell King while (len) { 35828e74a7cSRussell King this_len = len; 3590d035bedSRussell King if (this_len > block_size) 3600d035bedSRussell King this_len = block_size; 36128e74a7cSRussell King 36228e74a7cSRussell King msgs[1].len = this_len; 36328e74a7cSRussell King 3643bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 36573970055SRussell King if (ret < 0) 36673970055SRussell King return ret; 36773970055SRussell King 36828e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 36928e74a7cSRussell King break; 37028e74a7cSRussell King 37128e74a7cSRussell King msgs[1].buf += this_len; 37228e74a7cSRussell King dev_addr += this_len; 37328e74a7cSRussell King len -= this_len; 37428e74a7cSRussell King } 37528e74a7cSRussell King 37628e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 37773970055SRussell King } 37873970055SRussell King 3793bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 38073970055SRussell King size_t len) 38173970055SRussell King { 3823bb35261SJon Nettleton struct i2c_msg msgs[1]; 3833bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3843bb35261SJon Nettleton int ret; 3853bb35261SJon Nettleton 3863bb35261SJon Nettleton msgs[0].addr = bus_addr; 3873bb35261SJon Nettleton msgs[0].flags = 0; 3883bb35261SJon Nettleton msgs[0].len = 1 + len; 3893bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3903bb35261SJon Nettleton if (!msgs[0].buf) 3913bb35261SJon Nettleton return -ENOMEM; 3923bb35261SJon Nettleton 3933bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3943bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3953bb35261SJon Nettleton 3963bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3973bb35261SJon Nettleton 3983bb35261SJon Nettleton kfree(msgs[0].buf); 3993bb35261SJon Nettleton 4003bb35261SJon Nettleton if (ret < 0) 4013bb35261SJon Nettleton return ret; 4023bb35261SJon Nettleton 4033bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 40473970055SRussell King } 40573970055SRussell King 40673970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 40773970055SRussell King { 40873970055SRussell King struct mii_bus *i2c_mii; 40973970055SRussell King int ret; 41073970055SRussell King 41173970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 41273970055SRussell King return -EINVAL; 41373970055SRussell King 41473970055SRussell King sfp->i2c = i2c; 41573970055SRussell King sfp->read = sfp_i2c_read; 4163bb35261SJon Nettleton sfp->write = sfp_i2c_write; 41773970055SRussell King 41873970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 41973970055SRussell King if (IS_ERR(i2c_mii)) 42073970055SRussell King return PTR_ERR(i2c_mii); 42173970055SRussell King 42273970055SRussell King i2c_mii->name = "SFP I2C Bus"; 42373970055SRussell King i2c_mii->phy_mask = ~0; 42473970055SRussell King 42573970055SRussell King ret = mdiobus_register(i2c_mii); 42673970055SRussell King if (ret < 0) { 42773970055SRussell King mdiobus_free(i2c_mii); 42873970055SRussell King return ret; 42973970055SRussell King } 43073970055SRussell King 43173970055SRussell King sfp->i2c_mii = i2c_mii; 43273970055SRussell King 43373970055SRussell King return 0; 43473970055SRussell King } 43573970055SRussell King 43673970055SRussell King /* Interface */ 43773970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 43873970055SRussell King { 43973970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 44073970055SRussell King } 44173970055SRussell King 4423bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4433bb35261SJon Nettleton { 4443bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4453bb35261SJon Nettleton } 4463bb35261SJon Nettleton 447f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 448f3c9a666SRussell King { 449f3c9a666SRussell King unsigned int state = 0; 450f3c9a666SRussell King u8 status; 4510dea4d03SRussell King int ret; 452f3c9a666SRussell King 4530dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 4540dea4d03SRussell King if (ret == sizeof(status)) { 455f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 456f3c9a666SRussell King state |= SFP_F_LOS; 457f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 458f3c9a666SRussell King state |= SFP_F_TX_FAULT; 4590dea4d03SRussell King } else { 4600dea4d03SRussell King dev_err_ratelimited(sfp->dev, 4610dea4d03SRussell King "failed to read SFP soft status: %d\n", 4620dea4d03SRussell King ret); 4630dea4d03SRussell King /* Preserve the current state */ 4640dea4d03SRussell King state = sfp->state; 465f3c9a666SRussell King } 466f3c9a666SRussell King 467f3c9a666SRussell King return state & sfp->state_soft_mask; 468f3c9a666SRussell King } 469f3c9a666SRussell King 470f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 471f3c9a666SRussell King { 472f3c9a666SRussell King u8 status; 473f3c9a666SRussell King 474f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 475f3c9a666SRussell King sizeof(status)) { 476f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 477f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 478f3c9a666SRussell King else 479f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 480f3c9a666SRussell King 481f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 482f3c9a666SRussell King } 483f3c9a666SRussell King } 484f3c9a666SRussell King 485f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 486f3c9a666SRussell King { 487f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 488f3c9a666SRussell King 489f3c9a666SRussell King sfp->state_soft_mask = 0; 490f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && 491f3c9a666SRussell King !sfp->gpio[GPIO_TX_DISABLE]) 492f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_DISABLE; 493f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && 494f3c9a666SRussell King !sfp->gpio[GPIO_TX_FAULT]) 495f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_FAULT; 496f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && 497f3c9a666SRussell King !sfp->gpio[GPIO_LOS]) 498f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_LOS; 499f3c9a666SRussell King 500f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 501f3c9a666SRussell King !sfp->need_poll) 502f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 503f3c9a666SRussell King } 504f3c9a666SRussell King 505f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 506f3c9a666SRussell King { 507f3c9a666SRussell King sfp->state_soft_mask = 0; 508f3c9a666SRussell King } 509f3c9a666SRussell King 510f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 511f3c9a666SRussell King { 512f3c9a666SRussell King unsigned int state = sfp->get_state(sfp); 513f3c9a666SRussell King 514f3c9a666SRussell King if (state & SFP_F_PRESENT && 515f3c9a666SRussell King sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) 516f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 517f3c9a666SRussell King 518f3c9a666SRussell King return state; 519f3c9a666SRussell King } 520f3c9a666SRussell King 521f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 522f3c9a666SRussell King { 523f3c9a666SRussell King sfp->set_state(sfp, state); 524f3c9a666SRussell King 525f3c9a666SRussell King if (state & SFP_F_PRESENT && 526f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 527f3c9a666SRussell King sfp_soft_set_state(sfp, state); 528f3c9a666SRussell King } 529f3c9a666SRussell King 53073970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 53173970055SRussell King { 53273970055SRussell King u8 *p, check; 53373970055SRussell King 53473970055SRussell King for (p = buf, check = 0; len; p++, len--) 53573970055SRussell King check += *p; 53673970055SRussell King 53773970055SRussell King return check; 53873970055SRussell King } 53973970055SRussell King 5401323061aSAndrew Lunn /* hwmon */ 5411323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 5421323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5431323061aSAndrew Lunn enum hwmon_sensor_types type, 5441323061aSAndrew Lunn u32 attr, int channel) 5451323061aSAndrew Lunn { 5461323061aSAndrew Lunn const struct sfp *sfp = data; 5471323061aSAndrew Lunn 5481323061aSAndrew Lunn switch (type) { 5491323061aSAndrew Lunn case hwmon_temp: 5501323061aSAndrew Lunn switch (attr) { 5511323061aSAndrew Lunn case hwmon_temp_min_alarm: 5521323061aSAndrew Lunn case hwmon_temp_max_alarm: 5531323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5541323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5551323061aSAndrew Lunn case hwmon_temp_min: 5561323061aSAndrew Lunn case hwmon_temp_max: 5571323061aSAndrew Lunn case hwmon_temp_lcrit: 5581323061aSAndrew Lunn case hwmon_temp_crit: 559a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 560a33710bdSAndrew Lunn return 0; 561df561f66SGustavo A. R. Silva fallthrough; 562a33710bdSAndrew Lunn case hwmon_temp_input: 563c1236979SAndrew Lunn case hwmon_temp_label: 5641323061aSAndrew Lunn return 0444; 5651323061aSAndrew Lunn default: 5661323061aSAndrew Lunn return 0; 5671323061aSAndrew Lunn } 5681323061aSAndrew Lunn case hwmon_in: 5691323061aSAndrew Lunn switch (attr) { 5701323061aSAndrew Lunn case hwmon_in_min_alarm: 5711323061aSAndrew Lunn case hwmon_in_max_alarm: 5721323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5731323061aSAndrew Lunn case hwmon_in_crit_alarm: 5741323061aSAndrew Lunn case hwmon_in_min: 5751323061aSAndrew Lunn case hwmon_in_max: 5761323061aSAndrew Lunn case hwmon_in_lcrit: 5771323061aSAndrew Lunn case hwmon_in_crit: 578a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 579a33710bdSAndrew Lunn return 0; 580df561f66SGustavo A. R. Silva fallthrough; 581a33710bdSAndrew Lunn case hwmon_in_input: 582c1236979SAndrew Lunn case hwmon_in_label: 5831323061aSAndrew Lunn return 0444; 5841323061aSAndrew Lunn default: 5851323061aSAndrew Lunn return 0; 5861323061aSAndrew Lunn } 5871323061aSAndrew Lunn case hwmon_curr: 5881323061aSAndrew Lunn switch (attr) { 5891323061aSAndrew Lunn case hwmon_curr_min_alarm: 5901323061aSAndrew Lunn case hwmon_curr_max_alarm: 5911323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 5921323061aSAndrew Lunn case hwmon_curr_crit_alarm: 5931323061aSAndrew Lunn case hwmon_curr_min: 5941323061aSAndrew Lunn case hwmon_curr_max: 5951323061aSAndrew Lunn case hwmon_curr_lcrit: 5961323061aSAndrew Lunn case hwmon_curr_crit: 597a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 598a33710bdSAndrew Lunn return 0; 599df561f66SGustavo A. R. Silva fallthrough; 600a33710bdSAndrew Lunn case hwmon_curr_input: 601c1236979SAndrew Lunn case hwmon_curr_label: 6021323061aSAndrew Lunn return 0444; 6031323061aSAndrew Lunn default: 6041323061aSAndrew Lunn return 0; 6051323061aSAndrew Lunn } 6061323061aSAndrew Lunn case hwmon_power: 6071323061aSAndrew Lunn /* External calibration of receive power requires 6081323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 6091323061aSAndrew Lunn * is not easy, so just skip it. If the module does 6101323061aSAndrew Lunn * not require external calibration, we can however 6111323061aSAndrew Lunn * show receiver power, since FP is then not needed. 6121323061aSAndrew Lunn */ 6131323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 6141323061aSAndrew Lunn channel == 1) 6151323061aSAndrew Lunn return 0; 6161323061aSAndrew Lunn switch (attr) { 6171323061aSAndrew Lunn case hwmon_power_min_alarm: 6181323061aSAndrew Lunn case hwmon_power_max_alarm: 6191323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 6201323061aSAndrew Lunn case hwmon_power_crit_alarm: 6211323061aSAndrew Lunn case hwmon_power_min: 6221323061aSAndrew Lunn case hwmon_power_max: 6231323061aSAndrew Lunn case hwmon_power_lcrit: 6241323061aSAndrew Lunn case hwmon_power_crit: 625a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 626a33710bdSAndrew Lunn return 0; 627df561f66SGustavo A. R. Silva fallthrough; 628a33710bdSAndrew Lunn case hwmon_power_input: 629c1236979SAndrew Lunn case hwmon_power_label: 6301323061aSAndrew Lunn return 0444; 6311323061aSAndrew Lunn default: 6321323061aSAndrew Lunn return 0; 6331323061aSAndrew Lunn } 6341323061aSAndrew Lunn default: 6351323061aSAndrew Lunn return 0; 6361323061aSAndrew Lunn } 6371323061aSAndrew Lunn } 6381323061aSAndrew Lunn 6391323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 6401323061aSAndrew Lunn { 6411323061aSAndrew Lunn __be16 val; 6421323061aSAndrew Lunn int err; 6431323061aSAndrew Lunn 6441323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6451323061aSAndrew Lunn if (err < 0) 6461323061aSAndrew Lunn return err; 6471323061aSAndrew Lunn 6481323061aSAndrew Lunn *value = be16_to_cpu(val); 6491323061aSAndrew Lunn 6501323061aSAndrew Lunn return 0; 6511323061aSAndrew Lunn } 6521323061aSAndrew Lunn 6531323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6541323061aSAndrew Lunn { 6550cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6561323061aSAndrew Lunn } 6571323061aSAndrew Lunn 6581323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6591323061aSAndrew Lunn long *value) 6601323061aSAndrew Lunn { 6611323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6621323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6631323061aSAndrew Lunn } 6641323061aSAndrew Lunn 6651323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6661323061aSAndrew Lunn { 6671323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6681323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6691323061aSAndrew Lunn 6701323061aSAndrew Lunn if (*value >= 0x8000) 6711323061aSAndrew Lunn *value -= 0x10000; 6721323061aSAndrew Lunn 6731323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6741323061aSAndrew Lunn } 6751323061aSAndrew Lunn 6761323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6771323061aSAndrew Lunn { 6781323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6791323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6801323061aSAndrew Lunn 6811323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6821323061aSAndrew Lunn } 6831323061aSAndrew Lunn 6841323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 6851323061aSAndrew Lunn { 6861323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 6871323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 6881323061aSAndrew Lunn 6891323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 6901323061aSAndrew Lunn } 6911323061aSAndrew Lunn 6921323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 6931323061aSAndrew Lunn { 6941323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 6951323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 6961323061aSAndrew Lunn 6971323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6981323061aSAndrew Lunn } 6991323061aSAndrew Lunn 7001323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 7011323061aSAndrew Lunn { 7021323061aSAndrew Lunn int err; 7031323061aSAndrew Lunn 7041323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7051323061aSAndrew Lunn if (err < 0) 7061323061aSAndrew Lunn return err; 7071323061aSAndrew Lunn 7081323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7091323061aSAndrew Lunn 7101323061aSAndrew Lunn return 0; 7111323061aSAndrew Lunn } 7121323061aSAndrew Lunn 7131323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 7141323061aSAndrew Lunn { 7151323061aSAndrew Lunn int err; 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7181323061aSAndrew Lunn if (err < 0) 7191323061aSAndrew Lunn return err; 7201323061aSAndrew Lunn 7211323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7221323061aSAndrew Lunn 7231323061aSAndrew Lunn return 0; 7241323061aSAndrew Lunn } 7251323061aSAndrew Lunn 7261323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 7271323061aSAndrew Lunn { 7281323061aSAndrew Lunn int err; 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7311323061aSAndrew Lunn if (err < 0) 7321323061aSAndrew Lunn return err; 7331323061aSAndrew Lunn 7341323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7351323061aSAndrew Lunn 7361323061aSAndrew Lunn return 0; 7371323061aSAndrew Lunn } 7381323061aSAndrew Lunn 7391323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 7401323061aSAndrew Lunn { 7411323061aSAndrew Lunn int err; 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7441323061aSAndrew Lunn if (err < 0) 7451323061aSAndrew Lunn return err; 7461323061aSAndrew Lunn 7471323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7481323061aSAndrew Lunn 7491323061aSAndrew Lunn return 0; 7501323061aSAndrew Lunn } 7511323061aSAndrew Lunn 7521323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7531323061aSAndrew Lunn { 7541323061aSAndrew Lunn int err; 7551323061aSAndrew Lunn 7561323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7571323061aSAndrew Lunn if (err < 0) 7581323061aSAndrew Lunn return err; 7591323061aSAndrew Lunn 7601323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7611323061aSAndrew Lunn 7621323061aSAndrew Lunn return 0; 7631323061aSAndrew Lunn } 7641323061aSAndrew Lunn 7651323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7661323061aSAndrew Lunn { 7671323061aSAndrew Lunn u8 status; 7681323061aSAndrew Lunn int err; 7691323061aSAndrew Lunn 7701323061aSAndrew Lunn switch (attr) { 7711323061aSAndrew Lunn case hwmon_temp_input: 7721323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7731323061aSAndrew Lunn 7741323061aSAndrew Lunn case hwmon_temp_lcrit: 7751323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7761323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7771323061aSAndrew Lunn return 0; 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn case hwmon_temp_min: 7801323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7811323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7821323061aSAndrew Lunn return 0; 7831323061aSAndrew Lunn case hwmon_temp_max: 7841323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 7851323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7861323061aSAndrew Lunn return 0; 7871323061aSAndrew Lunn 7881323061aSAndrew Lunn case hwmon_temp_crit: 7891323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 7901323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7911323061aSAndrew Lunn return 0; 7921323061aSAndrew Lunn 7931323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7941323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7951323061aSAndrew Lunn if (err < 0) 7961323061aSAndrew Lunn return err; 7971323061aSAndrew Lunn 7981323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 7991323061aSAndrew Lunn return 0; 8001323061aSAndrew Lunn 8011323061aSAndrew Lunn case hwmon_temp_min_alarm: 8021323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8031323061aSAndrew Lunn if (err < 0) 8041323061aSAndrew Lunn return err; 8051323061aSAndrew Lunn 8061323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 8071323061aSAndrew Lunn return 0; 8081323061aSAndrew Lunn 8091323061aSAndrew Lunn case hwmon_temp_max_alarm: 8101323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8111323061aSAndrew Lunn if (err < 0) 8121323061aSAndrew Lunn return err; 8131323061aSAndrew Lunn 8141323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 8151323061aSAndrew Lunn return 0; 8161323061aSAndrew Lunn 8171323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8181323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8191323061aSAndrew Lunn if (err < 0) 8201323061aSAndrew Lunn return err; 8211323061aSAndrew Lunn 8221323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 8231323061aSAndrew Lunn return 0; 8241323061aSAndrew Lunn default: 8251323061aSAndrew Lunn return -EOPNOTSUPP; 8261323061aSAndrew Lunn } 8271323061aSAndrew Lunn 8281323061aSAndrew Lunn return -EOPNOTSUPP; 8291323061aSAndrew Lunn } 8301323061aSAndrew Lunn 8311323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 8321323061aSAndrew Lunn { 8331323061aSAndrew Lunn u8 status; 8341323061aSAndrew Lunn int err; 8351323061aSAndrew Lunn 8361323061aSAndrew Lunn switch (attr) { 8371323061aSAndrew Lunn case hwmon_in_input: 8381323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 8391323061aSAndrew Lunn 8401323061aSAndrew Lunn case hwmon_in_lcrit: 8411323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 8421323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8431323061aSAndrew Lunn return 0; 8441323061aSAndrew Lunn 8451323061aSAndrew Lunn case hwmon_in_min: 8461323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8471323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8481323061aSAndrew Lunn return 0; 8491323061aSAndrew Lunn 8501323061aSAndrew Lunn case hwmon_in_max: 8511323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8521323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8531323061aSAndrew Lunn return 0; 8541323061aSAndrew Lunn 8551323061aSAndrew Lunn case hwmon_in_crit: 8561323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8571323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8581323061aSAndrew Lunn return 0; 8591323061aSAndrew Lunn 8601323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8611323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8621323061aSAndrew Lunn if (err < 0) 8631323061aSAndrew Lunn return err; 8641323061aSAndrew Lunn 8651323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8661323061aSAndrew Lunn return 0; 8671323061aSAndrew Lunn 8681323061aSAndrew Lunn case hwmon_in_min_alarm: 8691323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8701323061aSAndrew Lunn if (err < 0) 8711323061aSAndrew Lunn return err; 8721323061aSAndrew Lunn 8731323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 8741323061aSAndrew Lunn return 0; 8751323061aSAndrew Lunn 8761323061aSAndrew Lunn case hwmon_in_max_alarm: 8771323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8781323061aSAndrew Lunn if (err < 0) 8791323061aSAndrew Lunn return err; 8801323061aSAndrew Lunn 8811323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8821323061aSAndrew Lunn return 0; 8831323061aSAndrew Lunn 8841323061aSAndrew Lunn case hwmon_in_crit_alarm: 8851323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8861323061aSAndrew Lunn if (err < 0) 8871323061aSAndrew Lunn return err; 8881323061aSAndrew Lunn 8891323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 8901323061aSAndrew Lunn return 0; 8911323061aSAndrew Lunn default: 8921323061aSAndrew Lunn return -EOPNOTSUPP; 8931323061aSAndrew Lunn } 8941323061aSAndrew Lunn 8951323061aSAndrew Lunn return -EOPNOTSUPP; 8961323061aSAndrew Lunn } 8971323061aSAndrew Lunn 8981323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 8991323061aSAndrew Lunn { 9001323061aSAndrew Lunn u8 status; 9011323061aSAndrew Lunn int err; 9021323061aSAndrew Lunn 9031323061aSAndrew Lunn switch (attr) { 9041323061aSAndrew Lunn case hwmon_curr_input: 9051323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 9061323061aSAndrew Lunn 9071323061aSAndrew Lunn case hwmon_curr_lcrit: 9081323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 9091323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9101323061aSAndrew Lunn return 0; 9111323061aSAndrew Lunn 9121323061aSAndrew Lunn case hwmon_curr_min: 9131323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 9141323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9151323061aSAndrew Lunn return 0; 9161323061aSAndrew Lunn 9171323061aSAndrew Lunn case hwmon_curr_max: 9181323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 9191323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9201323061aSAndrew Lunn return 0; 9211323061aSAndrew Lunn 9221323061aSAndrew Lunn case hwmon_curr_crit: 9231323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 9241323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9251323061aSAndrew Lunn return 0; 9261323061aSAndrew Lunn 9271323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9281323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9291323061aSAndrew Lunn if (err < 0) 9301323061aSAndrew Lunn return err; 9311323061aSAndrew Lunn 9321323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 9331323061aSAndrew Lunn return 0; 9341323061aSAndrew Lunn 9351323061aSAndrew Lunn case hwmon_curr_min_alarm: 9361323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9371323061aSAndrew Lunn if (err < 0) 9381323061aSAndrew Lunn return err; 9391323061aSAndrew Lunn 9401323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 9411323061aSAndrew Lunn return 0; 9421323061aSAndrew Lunn 9431323061aSAndrew Lunn case hwmon_curr_max_alarm: 9441323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9451323061aSAndrew Lunn if (err < 0) 9461323061aSAndrew Lunn return err; 9471323061aSAndrew Lunn 9481323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9491323061aSAndrew Lunn return 0; 9501323061aSAndrew Lunn 9511323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9521323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9531323061aSAndrew Lunn if (err < 0) 9541323061aSAndrew Lunn return err; 9551323061aSAndrew Lunn 9561323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9571323061aSAndrew Lunn return 0; 9581323061aSAndrew Lunn default: 9591323061aSAndrew Lunn return -EOPNOTSUPP; 9601323061aSAndrew Lunn } 9611323061aSAndrew Lunn 9621323061aSAndrew Lunn return -EOPNOTSUPP; 9631323061aSAndrew Lunn } 9641323061aSAndrew Lunn 9651323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9661323061aSAndrew Lunn { 9671323061aSAndrew Lunn u8 status; 9681323061aSAndrew Lunn int err; 9691323061aSAndrew Lunn 9701323061aSAndrew Lunn switch (attr) { 9711323061aSAndrew Lunn case hwmon_power_input: 9721323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9731323061aSAndrew Lunn 9741323061aSAndrew Lunn case hwmon_power_lcrit: 9751323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9761323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9771323061aSAndrew Lunn return 0; 9781323061aSAndrew Lunn 9791323061aSAndrew Lunn case hwmon_power_min: 9801323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9811323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9821323061aSAndrew Lunn return 0; 9831323061aSAndrew Lunn 9841323061aSAndrew Lunn case hwmon_power_max: 9851323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 9861323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9871323061aSAndrew Lunn return 0; 9881323061aSAndrew Lunn 9891323061aSAndrew Lunn case hwmon_power_crit: 9901323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 9911323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9921323061aSAndrew Lunn return 0; 9931323061aSAndrew Lunn 9941323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9951323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9961323061aSAndrew Lunn if (err < 0) 9971323061aSAndrew Lunn return err; 9981323061aSAndrew Lunn 9991323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 10001323061aSAndrew Lunn return 0; 10011323061aSAndrew Lunn 10021323061aSAndrew Lunn case hwmon_power_min_alarm: 10031323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10041323061aSAndrew Lunn if (err < 0) 10051323061aSAndrew Lunn return err; 10061323061aSAndrew Lunn 10071323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 10081323061aSAndrew Lunn return 0; 10091323061aSAndrew Lunn 10101323061aSAndrew Lunn case hwmon_power_max_alarm: 10111323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10121323061aSAndrew Lunn if (err < 0) 10131323061aSAndrew Lunn return err; 10141323061aSAndrew Lunn 10151323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 10161323061aSAndrew Lunn return 0; 10171323061aSAndrew Lunn 10181323061aSAndrew Lunn case hwmon_power_crit_alarm: 10191323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10201323061aSAndrew Lunn if (err < 0) 10211323061aSAndrew Lunn return err; 10221323061aSAndrew Lunn 10231323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 10241323061aSAndrew Lunn return 0; 10251323061aSAndrew Lunn default: 10261323061aSAndrew Lunn return -EOPNOTSUPP; 10271323061aSAndrew Lunn } 10281323061aSAndrew Lunn 10291323061aSAndrew Lunn return -EOPNOTSUPP; 10301323061aSAndrew Lunn } 10311323061aSAndrew Lunn 10321323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 10331323061aSAndrew Lunn { 10341323061aSAndrew Lunn u8 status; 10351323061aSAndrew Lunn int err; 10361323061aSAndrew Lunn 10371323061aSAndrew Lunn switch (attr) { 10381323061aSAndrew Lunn case hwmon_power_input: 10391323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 10401323061aSAndrew Lunn 10411323061aSAndrew Lunn case hwmon_power_lcrit: 10421323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10431323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10441323061aSAndrew Lunn return 0; 10451323061aSAndrew Lunn 10461323061aSAndrew Lunn case hwmon_power_min: 10471323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10481323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10491323061aSAndrew Lunn return 0; 10501323061aSAndrew Lunn 10511323061aSAndrew Lunn case hwmon_power_max: 10521323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10531323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10541323061aSAndrew Lunn return 0; 10551323061aSAndrew Lunn 10561323061aSAndrew Lunn case hwmon_power_crit: 10571323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10581323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10591323061aSAndrew Lunn return 0; 10601323061aSAndrew Lunn 10611323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10621323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10631323061aSAndrew Lunn if (err < 0) 10641323061aSAndrew Lunn return err; 10651323061aSAndrew Lunn 10661323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10671323061aSAndrew Lunn return 0; 10681323061aSAndrew Lunn 10691323061aSAndrew Lunn case hwmon_power_min_alarm: 10701323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10711323061aSAndrew Lunn if (err < 0) 10721323061aSAndrew Lunn return err; 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 10751323061aSAndrew Lunn return 0; 10761323061aSAndrew Lunn 10771323061aSAndrew Lunn case hwmon_power_max_alarm: 10781323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10791323061aSAndrew Lunn if (err < 0) 10801323061aSAndrew Lunn return err; 10811323061aSAndrew Lunn 10821323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 10831323061aSAndrew Lunn return 0; 10841323061aSAndrew Lunn 10851323061aSAndrew Lunn case hwmon_power_crit_alarm: 10861323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10871323061aSAndrew Lunn if (err < 0) 10881323061aSAndrew Lunn return err; 10891323061aSAndrew Lunn 10901323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 10911323061aSAndrew Lunn return 0; 10921323061aSAndrew Lunn default: 10931323061aSAndrew Lunn return -EOPNOTSUPP; 10941323061aSAndrew Lunn } 10951323061aSAndrew Lunn 10961323061aSAndrew Lunn return -EOPNOTSUPP; 10971323061aSAndrew Lunn } 10981323061aSAndrew Lunn 10991323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 11001323061aSAndrew Lunn u32 attr, int channel, long *value) 11011323061aSAndrew Lunn { 11021323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 11031323061aSAndrew Lunn 11041323061aSAndrew Lunn switch (type) { 11051323061aSAndrew Lunn case hwmon_temp: 11061323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 11071323061aSAndrew Lunn case hwmon_in: 11081323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 11091323061aSAndrew Lunn case hwmon_curr: 11101323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 11111323061aSAndrew Lunn case hwmon_power: 11121323061aSAndrew Lunn switch (channel) { 11131323061aSAndrew Lunn case 0: 11141323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 11151323061aSAndrew Lunn case 1: 11161323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 11171323061aSAndrew Lunn default: 11181323061aSAndrew Lunn return -EOPNOTSUPP; 11191323061aSAndrew Lunn } 11201323061aSAndrew Lunn default: 11211323061aSAndrew Lunn return -EOPNOTSUPP; 11221323061aSAndrew Lunn } 11231323061aSAndrew Lunn } 11241323061aSAndrew Lunn 1125c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1126c1236979SAndrew Lunn "TX_power", 1127c1236979SAndrew Lunn "RX_power", 1128c1236979SAndrew Lunn }; 1129c1236979SAndrew Lunn 1130c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1131c1236979SAndrew Lunn enum hwmon_sensor_types type, 1132c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1133c1236979SAndrew Lunn { 1134c1236979SAndrew Lunn switch (type) { 1135c1236979SAndrew Lunn case hwmon_curr: 1136c1236979SAndrew Lunn switch (attr) { 1137c1236979SAndrew Lunn case hwmon_curr_label: 1138c1236979SAndrew Lunn *str = "bias"; 1139c1236979SAndrew Lunn return 0; 1140c1236979SAndrew Lunn default: 1141c1236979SAndrew Lunn return -EOPNOTSUPP; 1142c1236979SAndrew Lunn } 1143c1236979SAndrew Lunn break; 1144c1236979SAndrew Lunn case hwmon_temp: 1145c1236979SAndrew Lunn switch (attr) { 1146c1236979SAndrew Lunn case hwmon_temp_label: 1147c1236979SAndrew Lunn *str = "temperature"; 1148c1236979SAndrew Lunn return 0; 1149c1236979SAndrew Lunn default: 1150c1236979SAndrew Lunn return -EOPNOTSUPP; 1151c1236979SAndrew Lunn } 1152c1236979SAndrew Lunn break; 1153c1236979SAndrew Lunn case hwmon_in: 1154c1236979SAndrew Lunn switch (attr) { 1155c1236979SAndrew Lunn case hwmon_in_label: 1156c1236979SAndrew Lunn *str = "VCC"; 1157c1236979SAndrew Lunn return 0; 1158c1236979SAndrew Lunn default: 1159c1236979SAndrew Lunn return -EOPNOTSUPP; 1160c1236979SAndrew Lunn } 1161c1236979SAndrew Lunn break; 1162c1236979SAndrew Lunn case hwmon_power: 1163c1236979SAndrew Lunn switch (attr) { 1164c1236979SAndrew Lunn case hwmon_power_label: 1165c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1166c1236979SAndrew Lunn return 0; 1167c1236979SAndrew Lunn default: 1168c1236979SAndrew Lunn return -EOPNOTSUPP; 1169c1236979SAndrew Lunn } 1170c1236979SAndrew Lunn break; 1171c1236979SAndrew Lunn default: 1172c1236979SAndrew Lunn return -EOPNOTSUPP; 1173c1236979SAndrew Lunn } 1174c1236979SAndrew Lunn 1175c1236979SAndrew Lunn return -EOPNOTSUPP; 1176c1236979SAndrew Lunn } 1177c1236979SAndrew Lunn 11781323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11791323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11801323061aSAndrew Lunn .read = sfp_hwmon_read, 1181c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11821323061aSAndrew Lunn }; 11831323061aSAndrew Lunn 11841323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 11851323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 11861323061aSAndrew Lunn 0, 11871323061aSAndrew Lunn }; 11881323061aSAndrew Lunn 11891323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 11901323061aSAndrew Lunn .type = hwmon_chip, 11911323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 11921323061aSAndrew Lunn }; 11931323061aSAndrew Lunn 11941323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 11951323061aSAndrew Lunn HWMON_T_INPUT | 11961323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 11971323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 11981323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1199c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1200c1236979SAndrew Lunn HWMON_T_LABEL, 12011323061aSAndrew Lunn 0, 12021323061aSAndrew Lunn }; 12031323061aSAndrew Lunn 12041323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 12051323061aSAndrew Lunn .type = hwmon_temp, 12061323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 12071323061aSAndrew Lunn }; 12081323061aSAndrew Lunn 12091323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 12101323061aSAndrew Lunn HWMON_I_INPUT | 12111323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 12121323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 12131323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1214c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1215c1236979SAndrew Lunn HWMON_I_LABEL, 12161323061aSAndrew Lunn 0, 12171323061aSAndrew Lunn }; 12181323061aSAndrew Lunn 12191323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 12201323061aSAndrew Lunn .type = hwmon_in, 12211323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 12221323061aSAndrew Lunn }; 12231323061aSAndrew Lunn 12241323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 12251323061aSAndrew Lunn HWMON_C_INPUT | 12261323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 12271323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 12281323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1229c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1230c1236979SAndrew Lunn HWMON_C_LABEL, 12311323061aSAndrew Lunn 0, 12321323061aSAndrew Lunn }; 12331323061aSAndrew Lunn 12341323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 12351323061aSAndrew Lunn .type = hwmon_curr, 12361323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 12371323061aSAndrew Lunn }; 12381323061aSAndrew Lunn 12391323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 12401323061aSAndrew Lunn /* Transmit power */ 12411323061aSAndrew Lunn HWMON_P_INPUT | 12421323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12431323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12441323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1245c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1246c1236979SAndrew Lunn HWMON_P_LABEL, 12471323061aSAndrew Lunn /* Receive power */ 12481323061aSAndrew Lunn HWMON_P_INPUT | 12491323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12501323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12511323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1252c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1253c1236979SAndrew Lunn HWMON_P_LABEL, 12541323061aSAndrew Lunn 0, 12551323061aSAndrew Lunn }; 12561323061aSAndrew Lunn 12571323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 12581323061aSAndrew Lunn .type = hwmon_power, 12591323061aSAndrew Lunn .config = sfp_hwmon_power_config, 12601323061aSAndrew Lunn }; 12611323061aSAndrew Lunn 12621323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 12631323061aSAndrew Lunn &sfp_hwmon_chip, 12641323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 12651323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 12661323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 12671323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 12681323061aSAndrew Lunn NULL, 12691323061aSAndrew Lunn }; 12701323061aSAndrew Lunn 12711323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12721323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12731323061aSAndrew Lunn .info = sfp_hwmon_info, 12741323061aSAndrew Lunn }; 12751323061aSAndrew Lunn 1276139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12771323061aSAndrew Lunn { 1278139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12791323061aSAndrew Lunn int err, i; 12801323061aSAndrew Lunn 1281*426c6cbcSPali Rohár /* hwmon interface needs to access 16bit registers in atomic way to 1282*426c6cbcSPali Rohár * guarantee coherency of the diagnostic monitoring data. If it is not 1283*426c6cbcSPali Rohár * possible to guarantee coherency because EEPROM is broken in such way 1284*426c6cbcSPali Rohár * that does not support atomic 16bit read operation then we have to 1285*426c6cbcSPali Rohár * skip registration of hwmon device. 1286*426c6cbcSPali Rohár */ 1287*426c6cbcSPali Rohár if (sfp->i2c_block_size < 2) { 1288*426c6cbcSPali Rohár dev_info(sfp->dev, 1289*426c6cbcSPali Rohár "skipping hwmon device registration due to broken EEPROM\n"); 1290*426c6cbcSPali Rohár dev_info(sfp->dev, 1291*426c6cbcSPali Rohár "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); 1292*426c6cbcSPali Rohár return; 1293*426c6cbcSPali Rohár } 1294*426c6cbcSPali Rohár 1295139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1296139d3a21SRussell King if (err < 0) { 1297139d3a21SRussell King if (sfp->hwmon_tries--) { 1298139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1299139d3a21SRussell King T_PROBE_RETRY_SLOW); 1300139d3a21SRussell King } else { 1301139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1302139d3a21SRussell King } 1303139d3a21SRussell King return; 1304139d3a21SRussell King } 1305139d3a21SRussell King 1306139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1307139d3a21SRussell King if (!sfp->hwmon_name) { 1308139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1309139d3a21SRussell King return; 1310139d3a21SRussell King } 1311139d3a21SRussell King 1312139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1313139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1314139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1315139d3a21SRussell King 1316139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1317139d3a21SRussell King sfp->hwmon_name, sfp, 1318139d3a21SRussell King &sfp_hwmon_chip_info, 1319139d3a21SRussell King NULL); 1320139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1321139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1322139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1323139d3a21SRussell King } 1324139d3a21SRussell King 1325139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1326139d3a21SRussell King { 13271323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 13281323061aSAndrew Lunn return 0; 13291323061aSAndrew Lunn 13301323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 13311323061aSAndrew Lunn return 0; 13321323061aSAndrew Lunn 13331323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 13341323061aSAndrew Lunn /* This driver in general does not support address 13351323061aSAndrew Lunn * change. 13361323061aSAndrew Lunn */ 13371323061aSAndrew Lunn return 0; 13381323061aSAndrew Lunn 1339139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1340139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 13411323061aSAndrew Lunn 1342139d3a21SRussell King return 0; 13431323061aSAndrew Lunn } 13441323061aSAndrew Lunn 13451323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13461323061aSAndrew Lunn { 1347139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13483e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13491323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13503e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13511323061aSAndrew Lunn kfree(sfp->hwmon_name); 13521323061aSAndrew Lunn } 13533e322474SAndrew Lunn } 1354139d3a21SRussell King 1355139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1356139d3a21SRussell King { 1357139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1358139d3a21SRussell King 1359139d3a21SRussell King return 0; 1360139d3a21SRussell King } 1361139d3a21SRussell King 1362139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1363139d3a21SRussell King { 1364139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1365139d3a21SRussell King } 13661323061aSAndrew Lunn #else 13671323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13681323061aSAndrew Lunn { 13691323061aSAndrew Lunn return 0; 13701323061aSAndrew Lunn } 13711323061aSAndrew Lunn 13721323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13731323061aSAndrew Lunn { 13741323061aSAndrew Lunn } 1375139d3a21SRussell King 1376139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1377139d3a21SRussell King { 1378139d3a21SRussell King return 0; 1379139d3a21SRussell King } 1380139d3a21SRussell King 1381139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1382139d3a21SRussell King { 1383139d3a21SRussell King } 13841323061aSAndrew Lunn #endif 13851323061aSAndrew Lunn 138673970055SRussell King /* Helpers */ 138773970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 138873970055SRussell King { 138973970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 139073970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 139173970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 139273970055SRussell King sfp_set_state(sfp, sfp->state); 139373970055SRussell King } 139473970055SRussell King 139573970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 139673970055SRussell King { 139773970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 139873970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 139973970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 140073970055SRussell King sfp_set_state(sfp, sfp->state); 140173970055SRussell King } 140273970055SRussell King 14039cc8976cSRussell King #if IS_ENABLED(CONFIG_DEBUG_FS) 14049cc8976cSRussell King static int sfp_debug_state_show(struct seq_file *s, void *data) 14059cc8976cSRussell King { 14069cc8976cSRussell King struct sfp *sfp = s->private; 14079cc8976cSRussell King 14089cc8976cSRussell King seq_printf(s, "Module state: %s\n", 14099cc8976cSRussell King mod_state_to_str(sfp->sm_mod_state)); 14109cc8976cSRussell King seq_printf(s, "Module probe attempts: %d %d\n", 14119cc8976cSRussell King R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, 14129cc8976cSRussell King R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); 14139cc8976cSRussell King seq_printf(s, "Device state: %s\n", 14149cc8976cSRussell King dev_state_to_str(sfp->sm_dev_state)); 14159cc8976cSRussell King seq_printf(s, "Main state: %s\n", 14169cc8976cSRussell King sm_state_to_str(sfp->sm_state)); 14179cc8976cSRussell King seq_printf(s, "Fault recovery remaining retries: %d\n", 14189cc8976cSRussell King sfp->sm_fault_retries); 14199cc8976cSRussell King seq_printf(s, "PHY probe remaining retries: %d\n", 14209cc8976cSRussell King sfp->sm_phy_retries); 14219cc8976cSRussell King seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); 14229cc8976cSRussell King seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); 14239cc8976cSRussell King seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); 14249cc8976cSRussell King seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); 14259cc8976cSRussell King return 0; 14269cc8976cSRussell King } 14279cc8976cSRussell King DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); 14289cc8976cSRussell King 14299cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14309cc8976cSRussell King { 14319cc8976cSRussell King sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); 14329cc8976cSRussell King 14339cc8976cSRussell King debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, 14349cc8976cSRussell King &sfp_debug_state_fops); 14359cc8976cSRussell King } 14369cc8976cSRussell King 14379cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14389cc8976cSRussell King { 14399cc8976cSRussell King debugfs_remove_recursive(sfp->debugfs_dir); 14409cc8976cSRussell King } 14419cc8976cSRussell King #else 14429cc8976cSRussell King static void sfp_debugfs_init(struct sfp *sfp) 14439cc8976cSRussell King { 14449cc8976cSRussell King } 14459cc8976cSRussell King 14469cc8976cSRussell King static void sfp_debugfs_exit(struct sfp *sfp) 14479cc8976cSRussell King { 14489cc8976cSRussell King } 14499cc8976cSRussell King #endif 14509cc8976cSRussell King 145173970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 145273970055SRussell King { 145373970055SRussell King unsigned int state = sfp->state; 145473970055SRussell King 145573970055SRussell King if (state & SFP_F_TX_DISABLE) 145673970055SRussell King return; 145773970055SRussell King 145873970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 145973970055SRussell King 146073970055SRussell King udelay(T_RESET_US); 146173970055SRussell King 146273970055SRussell King sfp_set_state(sfp, state); 146373970055SRussell King } 146473970055SRussell King 146573970055SRussell King /* SFP state machine */ 146673970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 146773970055SRussell King { 146873970055SRussell King if (timeout) 146973970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 147073970055SRussell King timeout); 147173970055SRussell King else 147273970055SRussell King cancel_delayed_work(&sfp->timeout); 147373970055SRussell King } 147473970055SRussell King 147573970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 147673970055SRussell King unsigned int timeout) 147773970055SRussell King { 147873970055SRussell King sfp->sm_state = state; 147973970055SRussell King sfp_sm_set_timer(sfp, timeout); 148073970055SRussell King } 148173970055SRussell King 14820936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1483516b29edSFlorian Fainelli unsigned int timeout) 148473970055SRussell King { 148573970055SRussell King sfp->sm_mod_state = state; 148673970055SRussell King sfp_sm_set_timer(sfp, timeout); 148773970055SRussell King } 148873970055SRussell King 148973970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 149073970055SRussell King { 149173970055SRussell King sfp_remove_phy(sfp->sfp_bus); 149273970055SRussell King phy_device_remove(sfp->mod_phy); 149373970055SRussell King phy_device_free(sfp->mod_phy); 149473970055SRussell King sfp->mod_phy = NULL; 149573970055SRussell King } 149673970055SRussell King 1497256e43cbSRussell King static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) 149873970055SRussell King { 149973970055SRussell King struct phy_device *phy; 150073970055SRussell King int err; 150173970055SRussell King 15029a484621SRussell King phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); 15031cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 15041cb89a14SRussell King return PTR_ERR(phy); 150520b56ed9SRussell King if (IS_ERR(phy)) { 150620b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 1507256e43cbSRussell King return PTR_ERR(phy); 150873970055SRussell King } 150973970055SRussell King 15109a484621SRussell King err = phy_device_register(phy); 15119a484621SRussell King if (err) { 15129a484621SRussell King phy_device_free(phy); 15139a484621SRussell King dev_err(sfp->dev, "phy_device_register failed: %d\n", err); 1514256e43cbSRussell King return err; 15159a484621SRussell King } 15169a484621SRussell King 151773970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 151873970055SRussell King if (err) { 151973970055SRussell King phy_device_remove(phy); 152073970055SRussell King phy_device_free(phy); 152173970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 1522256e43cbSRussell King return err; 152373970055SRussell King } 152473970055SRussell King 152573970055SRussell King sfp->mod_phy = phy; 1526256e43cbSRussell King 1527256e43cbSRussell King return 0; 152873970055SRussell King } 152973970055SRussell King 153073970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 153173970055SRussell King { 153273970055SRussell King sfp_link_up(sfp->sfp_bus); 153373970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 153473970055SRussell King } 153573970055SRussell King 153673970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 153773970055SRussell King { 153873970055SRussell King sfp_link_down(sfp->sfp_bus); 153973970055SRussell King } 154073970055SRussell King 154173970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 154273970055SRussell King { 1543624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1544624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1545624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1546624407d2SRussell King bool los = false; 154773970055SRussell King 1548710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1549624407d2SRussell King * are set, we assume that no LOS signal is available. If both are 1550624407d2SRussell King * set, we assume LOS is not implemented (and is meaningless.) 155173970055SRussell King */ 1552624407d2SRussell King if (los_options == los_inverted) 1553624407d2SRussell King los = !(sfp->state & SFP_F_LOS); 1554624407d2SRussell King else if (los_options == los_normal) 1555624407d2SRussell King los = !!(sfp->state & SFP_F_LOS); 155673970055SRussell King 155773970055SRussell King if (los) 155873970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 155973970055SRussell King else 156073970055SRussell King sfp_sm_link_up(sfp); 156173970055SRussell King } 156273970055SRussell King 1563710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1564710dfbb0SRussell King { 1565624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1566624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1567624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1568624407d2SRussell King 1569624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_LOW) || 1570624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_HIGH); 1571710dfbb0SRussell King } 1572710dfbb0SRussell King 1573710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1574710dfbb0SRussell King { 1575624407d2SRussell King const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); 1576624407d2SRussell King const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); 1577624407d2SRussell King __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); 1578624407d2SRussell King 1579624407d2SRussell King return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || 1580624407d2SRussell King (los_options == los_normal && event == SFP_E_LOS_LOW); 1581710dfbb0SRussell King } 1582710dfbb0SRussell King 158363ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 158473970055SRussell King { 1585281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1586516b29edSFlorian Fainelli dev_err(sfp->dev, 1587516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 158873970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 158973970055SRussell King } else { 159073970055SRussell King if (warn) 159173970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 159273970055SRussell King 159363ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 159473970055SRussell King } 159573970055SRussell King } 159673970055SRussell King 15979a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 15989a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 15999a484621SRussell King * or clause 45 PHY. 16009a484621SRussell King * 16019a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 16029a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 16039a484621SRussell King * PHY driver to determine. 16049a484621SRussell King * 16059a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 16069a484621SRussell King * mode according to the negotiated line speed. 16079a484621SRussell King */ 1608256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1609181f29daSRussell King { 1610256e43cbSRussell King int err = 0; 1611256e43cbSRussell King 16129a484621SRussell King switch (sfp->id.base.extended_cc) { 16139a484621SRussell King case SFF8024_ECC_10GBASE_T_SFI: 16149a484621SRussell King case SFF8024_ECC_10GBASE_T_SR: 16159a484621SRussell King case SFF8024_ECC_5GBASE_T: 16169a484621SRussell King case SFF8024_ECC_2_5GBASE_T: 1617256e43cbSRussell King err = sfp_sm_probe_phy(sfp, true); 16189a484621SRussell King break; 16199a484621SRussell King 16209a484621SRussell King default: 1621fa2de660SRussell King if (sfp->id.base.e1000_base_t) 1622256e43cbSRussell King err = sfp_sm_probe_phy(sfp, false); 16239a484621SRussell King break; 16249a484621SRussell King } 1625256e43cbSRussell King return err; 162673970055SRussell King } 162773970055SRussell King 1628ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 16293bb35261SJon Nettleton { 1630ed32abb1SRussell King u32 power_mW = 1000; 16313bb35261SJon Nettleton 16323bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1633ed32abb1SRussell King power_mW = 1500; 16343bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1635ed32abb1SRussell King power_mW = 2000; 16363bb35261SJon Nettleton 1637ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 16387cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 16397cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 16407cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 16417cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 16427cfa9c92SRussell King /* The module appears not to implement bus address 16437cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 16447cfa9c92SRussell King * indicated mode. 16457cfa9c92SRussell King */ 16463bb35261SJon Nettleton dev_err(sfp->dev, 16473bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1648ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16493bb35261SJon Nettleton return -EINVAL; 16507cfa9c92SRussell King } else { 16513bb35261SJon Nettleton dev_warn(sfp->dev, 16523bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1653ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 16543bb35261SJon Nettleton return 0; 16553bb35261SJon Nettleton } 16567cfa9c92SRussell King } 16577cfa9c92SRussell King 16587cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 16597cfa9c92SRussell King * an address change sequence, warn the user that the module may 16607cfa9c92SRussell King * not be functional. 16617cfa9c92SRussell King */ 16627cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 16637cfa9c92SRussell King dev_warn(sfp->dev, 166407f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 16657cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 16667cfa9c92SRussell King return 0; 16677cfa9c92SRussell King } 16683bb35261SJon Nettleton 1669ed32abb1SRussell King sfp->module_power_mW = power_mW; 1670ed32abb1SRussell King 1671ed32abb1SRussell King return 0; 1672ed32abb1SRussell King } 1673ed32abb1SRussell King 1674b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1675ed32abb1SRussell King { 1676ed32abb1SRussell King u8 val; 1677ed32abb1SRussell King int err; 1678ed32abb1SRussell King 16793bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16803bb35261SJon Nettleton if (err != sizeof(val)) { 16813bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 1682b036a554SRussell King return -EAGAIN; 16833bb35261SJon Nettleton } 16843bb35261SJon Nettleton 16859a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 16869a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 16879a484621SRussell King * if the bit is already set, we're already in high power mode. 16889a484621SRussell King */ 16899a484621SRussell King if (!!(val & BIT(0)) == enable) 16909a484621SRussell King return 0; 16919a484621SRussell King 1692b036a554SRussell King if (enable) 16933bb35261SJon Nettleton val |= BIT(0); 1694b036a554SRussell King else 1695b036a554SRussell King val &= ~BIT(0); 16963bb35261SJon Nettleton 16973bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16983bb35261SJon Nettleton if (err != sizeof(val)) { 16993bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 1700b036a554SRussell King return -EAGAIN; 17013bb35261SJon Nettleton } 17023bb35261SJon Nettleton 1703b036a554SRussell King if (enable) 17043bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1705ed32abb1SRussell King sfp->module_power_mW / 1000, 1706ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 17073bb35261SJon Nettleton 1708b036a554SRussell King return 0; 17093bb35261SJon Nettleton } 17103bb35261SJon Nettleton 1711*426c6cbcSPali Rohár /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL 1712*426c6cbcSPali Rohár * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do 1713*426c6cbcSPali Rohár * not support multibyte reads from the EEPROM. Each multi-byte read 1714*426c6cbcSPali Rohár * operation returns just one byte of EEPROM followed by zeros. There is 1715*426c6cbcSPali Rohár * no way to identify which modules are using Realtek RTL8672 and RTL9601C 1716*426c6cbcSPali Rohár * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor 1717*426c6cbcSPali Rohár * name and vendor id into EEPROM, so there is even no way to detect if 1718*426c6cbcSPali Rohár * module is V-SOL V2801F. Therefore check for those zeros in the read 1719*426c6cbcSPali Rohár * data and then based on check switch to reading EEPROM to one byte 1720*426c6cbcSPali Rohár * at a time. 17210d035bedSRussell King */ 1722*426c6cbcSPali Rohár static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) 17230d035bedSRussell King { 1724*426c6cbcSPali Rohár size_t i, block_size = sfp->i2c_block_size; 17250d035bedSRussell King 1726*426c6cbcSPali Rohár /* Already using byte IO */ 1727*426c6cbcSPali Rohár if (block_size == 1) 1728*426c6cbcSPali Rohár return false; 1729*426c6cbcSPali Rohár 1730*426c6cbcSPali Rohár for (i = 1; i < len; i += block_size) { 1731*426c6cbcSPali Rohár if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) 1732*426c6cbcSPali Rohár return false; 17330d035bedSRussell King } 1734*426c6cbcSPali Rohár return true; 17350d035bedSRussell King } 17360d035bedSRussell King 1737b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1738b18432c5SChris Healy { 1739b18432c5SChris Healy u8 check; 1740b18432c5SChris Healy int err; 1741b18432c5SChris Healy 1742b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1743b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1744b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1745b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1746b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1747b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1748b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1749b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1750b18432c5SChris Healy if (err != 3) { 1751b18432c5SChris Healy dev_err(sfp->dev, "Failed to rewrite module EEPROM: %d\n", err); 1752b18432c5SChris Healy return err; 1753b18432c5SChris Healy } 1754b18432c5SChris Healy 1755b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1756b18432c5SChris Healy mdelay(50); 1757b18432c5SChris Healy 1758b18432c5SChris Healy /* Update base structure checksum */ 1759b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1760b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1761b18432c5SChris Healy if (err != 1) { 1762b18432c5SChris Healy dev_err(sfp->dev, "Failed to update base structure checksum in fiber module EEPROM: %d\n", err); 1763b18432c5SChris Healy return err; 1764b18432c5SChris Healy } 1765b18432c5SChris Healy } 1766b18432c5SChris Healy return 0; 1767b18432c5SChris Healy } 1768b18432c5SChris Healy 1769e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 177073970055SRussell King { 177173970055SRussell King /* SFP module inserted - read I2C data */ 177273970055SRussell King struct sfp_eeprom_id id; 1773b18432c5SChris Healy bool cotsworks_sfbg; 1774981f1f80SRussell King bool cotsworks; 177573970055SRussell King u8 check; 17763bb35261SJon Nettleton int ret; 177773970055SRussell King 1778*426c6cbcSPali Rohár /* Some SFP modules and also some Linux I2C drivers do not like reads 1779*426c6cbcSPali Rohár * longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at 1780*426c6cbcSPali Rohár * a time. 17810d035bedSRussell King */ 1782*426c6cbcSPali Rohár sfp->i2c_block_size = 16; 17830d035bedSRussell King 17840d035bedSRussell King ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 17853bb35261SJon Nettleton if (ret < 0) { 1786e117be74SRussell King if (report) 17873bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 178873970055SRussell King return -EAGAIN; 178973970055SRussell King } 179073970055SRussell King 17910d035bedSRussell King if (ret != sizeof(id.base)) { 17923bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 179373970055SRussell King return -EAGAIN; 179473970055SRussell King } 179573970055SRussell King 1796*426c6cbcSPali Rohár /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from 1797*426c6cbcSPali Rohár * address 0x51 is just one byte at a time. Also SFF-8472 requires 1798*426c6cbcSPali Rohár * that EEPROM supports atomic 16bit read operation for diagnostic 1799*426c6cbcSPali Rohár * fields, so do not switch to one byte reading at a time unless it 1800*426c6cbcSPali Rohár * is really required and we have no other option. 1801*426c6cbcSPali Rohár */ 1802*426c6cbcSPali Rohár if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { 1803*426c6cbcSPali Rohár dev_info(sfp->dev, 1804*426c6cbcSPali Rohár "Detected broken RTL8672/RTL9601C emulated EEPROM\n"); 1805*426c6cbcSPali Rohár dev_info(sfp->dev, 1806*426c6cbcSPali Rohár "Switching to reading EEPROM to one byte at a time\n"); 1807*426c6cbcSPali Rohár sfp->i2c_block_size = 1; 1808*426c6cbcSPali Rohár 1809*426c6cbcSPali Rohár ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); 1810*426c6cbcSPali Rohár if (ret < 0) { 1811*426c6cbcSPali Rohár if (report) 1812*426c6cbcSPali Rohár dev_err(sfp->dev, "failed to read EEPROM: %d\n", 1813*426c6cbcSPali Rohár ret); 1814*426c6cbcSPali Rohár return -EAGAIN; 1815*426c6cbcSPali Rohár } 1816*426c6cbcSPali Rohár 1817*426c6cbcSPali Rohár if (ret != sizeof(id.base)) { 1818*426c6cbcSPali Rohár dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 1819*426c6cbcSPali Rohár return -EAGAIN; 1820*426c6cbcSPali Rohár } 1821*426c6cbcSPali Rohár } 1822*426c6cbcSPali Rohár 1823981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1824981f1f80SRussell King * do the final programming with the final module part number, 1825981f1f80SRussell King * serial number and date code. 1826981f1f80SRussell King */ 1827981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1828b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1829b18432c5SChris Healy 1830b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1831b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1832b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1833b18432c5SChris Healy */ 1834b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1835b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1836b18432c5SChris Healy if (ret < 0) 1837b18432c5SChris Healy return ret; 1838b18432c5SChris Healy } 1839981f1f80SRussell King 184073970055SRussell King /* Validate the checksum over the base structure */ 184173970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 184273970055SRussell King if (check != id.base.cc_base) { 1843981f1f80SRussell King if (cotsworks) { 1844981f1f80SRussell King dev_warn(sfp->dev, 1845981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1846981f1f80SRussell King check, id.base.cc_base); 1847981f1f80SRussell King } else { 184873970055SRussell King dev_err(sfp->dev, 1849981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1850981f1f80SRussell King check, id.base.cc_base); 185173970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1852981f1f80SRussell King 16, 1, &id, sizeof(id), true); 185373970055SRussell King return -EINVAL; 185473970055SRussell King } 1855981f1f80SRussell King } 185673970055SRussell King 18570d035bedSRussell King ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); 18580d035bedSRussell King if (ret < 0) { 18590d035bedSRussell King if (report) 18600d035bedSRussell King dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 18610d035bedSRussell King return -EAGAIN; 18620d035bedSRussell King } 18630d035bedSRussell King 18640d035bedSRussell King if (ret != sizeof(id.ext)) { 18650d035bedSRussell King dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 18660d035bedSRussell King return -EAGAIN; 18670d035bedSRussell King } 18680d035bedSRussell King 186973970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 187073970055SRussell King if (check != id.ext.cc_ext) { 1871981f1f80SRussell King if (cotsworks) { 1872981f1f80SRussell King dev_warn(sfp->dev, 1873981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1874981f1f80SRussell King check, id.ext.cc_ext); 1875981f1f80SRussell King } else { 187673970055SRussell King dev_err(sfp->dev, 1877981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1878981f1f80SRussell King check, id.ext.cc_ext); 1879981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1880981f1f80SRussell King 16, 1, &id, sizeof(id), true); 188173970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 188273970055SRussell King } 1883981f1f80SRussell King } 188473970055SRussell King 188573970055SRussell King sfp->id = id; 188673970055SRussell King 1887a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1888a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1889a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1890a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1891a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1892a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 189373970055SRussell King 1894259c8618SRussell King /* Check whether we support this module */ 1895f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1896259c8618SRussell King dev_err(sfp->dev, 1897259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 189873970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 189973970055SRussell King return -EINVAL; 190073970055SRussell King } 190173970055SRussell King 1902ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1903ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1904ec7681bdSRussell King dev_warn(sfp->dev, 1905ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1906ec7681bdSRussell King 1907ed32abb1SRussell King /* Parse the module power requirement */ 1908ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1909ed32abb1SRussell King if (ret < 0) 1910ed32abb1SRussell King return ret; 1911ed32abb1SRussell King 191226c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 191326c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 191426c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 191526c97a2dSRussell King else 191626c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 191726c97a2dSRussell King 1918b036a554SRussell King return 0; 191973970055SRussell King } 192073970055SRussell King 192173970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 192273970055SRussell King { 192373f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 192473970055SRussell King sfp_module_remove(sfp->sfp_bus); 192573970055SRussell King 19261323061aSAndrew Lunn sfp_hwmon_remove(sfp); 19271323061aSAndrew Lunn 192873970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1929ed32abb1SRussell King sfp->module_power_mW = 0; 193073970055SRussell King 193173970055SRussell King dev_info(sfp->dev, "module removed\n"); 193273970055SRussell King } 193373970055SRussell King 19346b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1935e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 193673970055SRussell King { 1937e85d81a1SRussell King switch (sfp->sm_dev_state) { 1938e85d81a1SRussell King default: 19396b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 19406b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 19416b0da5c9SRussell King break; 19426b0da5c9SRussell King 19436b0da5c9SRussell King case SFP_DEV_DOWN: 19446b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 19456b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 19466b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1947e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1948e85d81a1SRussell King break; 194973970055SRussell King 1950e85d81a1SRussell King case SFP_DEV_UP: 19516b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 19526b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 19536b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1954e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1955e85d81a1SRussell King break; 1956e85d81a1SRussell King } 1957e85d81a1SRussell King } 195873970055SRussell King 1959d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1960d900954fSRussell King * the on-board EEPROM, and sets up the power level. 196173970055SRussell King */ 1962e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1963e85d81a1SRussell King { 1964b036a554SRussell King int err; 1965b036a554SRussell King 1966b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1967b036a554SRussell King if (event == SFP_E_REMOVE) { 1968d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1969d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1970b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1971b036a554SRussell King return; 1972b036a554SRussell King } 1973b036a554SRussell King 1974b036a554SRussell King /* Handle device detach globally */ 197573f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 197673f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1977b036a554SRussell King if (sfp->module_power_mW > 1000 && 1978b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1979b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 198073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1981d2e816c0SRussell King return; 1982d2e816c0SRussell King } 1983d2e816c0SRussell King 198473970055SRussell King switch (sfp->sm_mod_state) { 198573970055SRussell King default: 1986e117be74SRussell King if (event == SFP_E_INSERT) { 1987d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 1988e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 1989e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 1990e117be74SRussell King } 199173970055SRussell King break; 199273970055SRussell King 199373970055SRussell King case SFP_MOD_PROBE: 199473f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 1995b036a554SRussell King if (event != SFP_E_TIMEOUT) 1996b036a554SRussell King break; 199773970055SRussell King 1998e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 1999b036a554SRussell King if (err == -EAGAIN) { 2000e117be74SRussell King if (sfp->sm_mod_tries_init && 2001e117be74SRussell King --sfp->sm_mod_tries_init) { 2002e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 2003b036a554SRussell King break; 2004e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 2005e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 2006e117be74SRussell King dev_warn(sfp->dev, 2007e117be74SRussell King "please wait, module slow to respond\n"); 2008e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 2009e117be74SRussell King break; 2010e117be74SRussell King } 2011b036a554SRussell King } 2012b036a554SRussell King if (err < 0) { 2013b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 2014b036a554SRussell King break; 2015b036a554SRussell King } 2016b036a554SRussell King 201738ecd706SRussell King err = sfp_hwmon_insert(sfp); 201838ecd706SRussell King if (err) 201938ecd706SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 202038ecd706SRussell King 202173f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 2022df561f66SGustavo A. R. Silva fallthrough; 202373f5e847SRussell King case SFP_MOD_WAITDEV: 202473f5e847SRussell King /* Ensure that the device is attached before proceeding */ 202573f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 202673f5e847SRussell King break; 202773f5e847SRussell King 202873f5e847SRussell King /* Report the module insertion to the upstream device */ 202973f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 203073f5e847SRussell King if (err < 0) { 203173f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 203273f5e847SRussell King break; 203373f5e847SRussell King } 203473f5e847SRussell King 2035b036a554SRussell King /* If this is a power level 1 module, we are done */ 2036b036a554SRussell King if (sfp->module_power_mW <= 1000) 2037b036a554SRussell King goto insert; 2038b036a554SRussell King 2039b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 2040df561f66SGustavo A. R. Silva fallthrough; 2041b036a554SRussell King case SFP_MOD_HPOWER: 2042b036a554SRussell King /* Enable high power mode */ 2043b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 204473f5e847SRussell King if (err < 0) { 204573f5e847SRussell King if (err != -EAGAIN) { 204673f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 20470936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 204873f5e847SRussell King } else { 2049e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 205073f5e847SRussell King } 205173f5e847SRussell King break; 205273f5e847SRussell King } 205373f5e847SRussell King 205473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 205573970055SRussell King break; 205673970055SRussell King 2057b036a554SRussell King case SFP_MOD_WAITPWR: 2058b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 2059b036a554SRussell King if (event != SFP_E_TIMEOUT) 2060b036a554SRussell King break; 2061b036a554SRussell King 2062b036a554SRussell King insert: 20630936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 20643bb35261SJon Nettleton break; 2065b036a554SRussell King 206673970055SRussell King case SFP_MOD_PRESENT: 206773970055SRussell King case SFP_MOD_ERROR: 206873970055SRussell King break; 206973970055SRussell King } 207073970055SRussell King } 207173970055SRussell King 2072e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 2073e85d81a1SRussell King { 2074eefa6f1fSRussell King unsigned long timeout; 20751cb89a14SRussell King int ret; 2076eefa6f1fSRussell King 207773970055SRussell King /* Some events are global */ 207873970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 207973970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 208073970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 208173970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 208273970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 208373970055SRussell King sfp_sm_link_down(sfp); 208474c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 208574c551caSRussell King sfp_module_stop(sfp->sfp_bus); 208673970055SRussell King if (sfp->mod_phy) 208773970055SRussell King sfp_sm_phy_detach(sfp); 20881539e0d3SRussell King sfp_module_tx_disable(sfp); 2089f3c9a666SRussell King sfp_soft_stop_poll(sfp); 209073970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 209173970055SRussell King return; 209273970055SRussell King } 209373970055SRussell King 209473970055SRussell King /* The main state machine */ 209573970055SRussell King switch (sfp->sm_state) { 209673970055SRussell King case SFP_S_DOWN: 2097eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 2098eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 2099eefa6f1fSRussell King break; 2100eefa6f1fSRussell King 2101f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 2102f3c9a666SRussell King sfp_soft_start_poll(sfp); 2103f3c9a666SRussell King 2104f3c9a666SRussell King sfp_module_tx_enable(sfp); 2105eefa6f1fSRussell King 2106eefa6f1fSRussell King /* Initialise the fault clearance retries */ 2107281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 2108eefa6f1fSRussell King 2109eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 2110eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 2111eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 2112eefa6f1fSRussell King */ 2113eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 2114eefa6f1fSRussell King break; 2115eefa6f1fSRussell King 2116eefa6f1fSRussell King case SFP_S_WAIT: 2117eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 2118eefa6f1fSRussell King break; 2119eefa6f1fSRussell King 2120eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 212126c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 212226c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 212326c97a2dSRussell King * initialise, which is indicated by TX_FAULT 212426c97a2dSRussell King * deasserting. 2125181f29daSRussell King */ 212626c97a2dSRussell King timeout = sfp->module_t_start_up; 2127eefa6f1fSRussell King if (timeout > T_WAIT) 2128eefa6f1fSRussell King timeout -= T_WAIT; 2129eefa6f1fSRussell King else 2130eefa6f1fSRussell King timeout = 1; 2131eefa6f1fSRussell King 2132eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 2133eefa6f1fSRussell King } else { 2134eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 2135eefa6f1fSRussell King * finished initialising. 2136eefa6f1fSRussell King */ 2137eefa6f1fSRussell King goto init_done; 2138181f29daSRussell King } 213973970055SRussell King break; 214073970055SRussell King 214173970055SRussell King case SFP_S_INIT: 2142d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 214326c97a2dSRussell King /* TX_FAULT is still asserted after t_init or 214426c97a2dSRussell King * or t_start_up, so assume there is a fault. 2145d23751a0SRussell King */ 2146d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2147281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2148d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 21491cb89a14SRussell King init_done: 21501cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 21511cb89a14SRussell King goto phy_probe; 21521cb89a14SRussell King } 21531cb89a14SRussell King break; 21541cb89a14SRussell King 21551cb89a14SRussell King case SFP_S_INIT_PHY: 21561cb89a14SRussell King if (event != SFP_E_TIMEOUT) 21571cb89a14SRussell King break; 21581cb89a14SRussell King phy_probe: 21591cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2160d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2161d23751a0SRussell King */ 21621cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 21631cb89a14SRussell King if (ret == -ENODEV) { 21641cb89a14SRussell King if (--sfp->sm_phy_retries) { 21651cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 21661cb89a14SRussell King break; 21671cb89a14SRussell King } else { 21681cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 21691cb89a14SRussell King } 21701cb89a14SRussell King } else if (ret) { 2171256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2172256e43cbSRussell King break; 2173256e43cbSRussell King } 217474c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 217574c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 217674c551caSRussell King break; 217774c551caSRussell King } 2178d23751a0SRussell King sfp_sm_link_check_los(sfp); 2179d23751a0SRussell King 2180d23751a0SRussell King /* Reset the fault retry count */ 2181281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2182d23751a0SRussell King break; 2183d23751a0SRussell King 2184d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2185d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2186d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 218726c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2188d23751a0SRussell King } 218973970055SRussell King break; 219073970055SRussell King 219173970055SRussell King case SFP_S_WAIT_LOS: 219273970055SRussell King if (event == SFP_E_TX_FAULT) 219363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2194710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 219573970055SRussell King sfp_sm_link_up(sfp); 219673970055SRussell King break; 219773970055SRussell King 219873970055SRussell King case SFP_S_LINK_UP: 219973970055SRussell King if (event == SFP_E_TX_FAULT) { 220073970055SRussell King sfp_sm_link_down(sfp); 220163ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2202710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 220373970055SRussell King sfp_sm_link_down(sfp); 220473970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 220573970055SRussell King } 220673970055SRussell King break; 220773970055SRussell King 220873970055SRussell King case SFP_S_TX_FAULT: 220973970055SRussell King if (event == SFP_E_TIMEOUT) { 221073970055SRussell King sfp_module_tx_fault_reset(sfp); 221126c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 221273970055SRussell King } 221373970055SRussell King break; 221473970055SRussell King 221573970055SRussell King case SFP_S_REINIT: 221673970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 221763ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 221873970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 221973970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 222073970055SRussell King sfp_sm_link_check_los(sfp); 222173970055SRussell King } 222273970055SRussell King break; 222373970055SRussell King 222473970055SRussell King case SFP_S_TX_DISABLE: 222573970055SRussell King break; 222673970055SRussell King } 2227e85d81a1SRussell King } 2228e85d81a1SRussell King 2229e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2230e85d81a1SRussell King { 2231e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2232e85d81a1SRussell King 2233e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2234e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2235e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2236e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2237e85d81a1SRussell King event_to_str(event)); 2238e85d81a1SRussell King 2239e85d81a1SRussell King sfp_sm_device(sfp, event); 22406b0da5c9SRussell King sfp_sm_module(sfp, event); 2241e85d81a1SRussell King sfp_sm_main(sfp, event); 224273970055SRussell King 22434005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 22444005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 22454005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 22464005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 224773970055SRussell King 224873970055SRussell King mutex_unlock(&sfp->sm_mutex); 224973970055SRussell King } 225073970055SRussell King 2251b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2252b5bfc21aSRussell King { 22536b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2254b5bfc21aSRussell King } 2255b5bfc21aSRussell King 2256b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2257b5bfc21aSRussell King { 22586b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2259b5bfc21aSRussell King } 2260b5bfc21aSRussell King 226173970055SRussell King static void sfp_start(struct sfp *sfp) 226273970055SRussell King { 226373970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 226473970055SRussell King } 226573970055SRussell King 226673970055SRussell King static void sfp_stop(struct sfp *sfp) 226773970055SRussell King { 226873970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 226973970055SRussell King } 227073970055SRussell King 227173970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 227273970055SRussell King { 227373970055SRussell King /* locking... and check module is present */ 227473970055SRussell King 2275ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2276ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 227773970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 227873970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 227973970055SRussell King } else { 228073970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 228173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 228273970055SRussell King } 228373970055SRussell King return 0; 228473970055SRussell King } 228573970055SRussell King 228673970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 228773970055SRussell King u8 *data) 228873970055SRussell King { 228973970055SRussell King unsigned int first, last, len; 229073970055SRussell King int ret; 229173970055SRussell King 229273970055SRussell King if (ee->len == 0) 229373970055SRussell King return -EINVAL; 229473970055SRussell King 229573970055SRussell King first = ee->offset; 229673970055SRussell King last = ee->offset + ee->len; 229773970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 229873970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 229973970055SRussell King len -= first; 230073970055SRussell King 23012794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 230273970055SRussell King if (ret < 0) 230373970055SRussell King return ret; 230473970055SRussell King 230573970055SRussell King first += len; 230673970055SRussell King data += len; 230773970055SRussell King } 23082794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 230973970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 231073970055SRussell King len -= first; 231173970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 231273970055SRussell King 23132794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 231473970055SRussell King if (ret < 0) 231573970055SRussell King return ret; 231673970055SRussell King } 231773970055SRussell King return 0; 231873970055SRussell King } 231973970055SRussell King 232073970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2321b5bfc21aSRussell King .attach = sfp_attach, 2322b5bfc21aSRussell King .detach = sfp_detach, 232373970055SRussell King .start = sfp_start, 232473970055SRussell King .stop = sfp_stop, 232573970055SRussell King .module_info = sfp_module_info, 232673970055SRussell King .module_eeprom = sfp_module_eeprom, 232773970055SRussell King }; 232873970055SRussell King 232973970055SRussell King static void sfp_timeout(struct work_struct *work) 233073970055SRussell King { 233173970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 233273970055SRussell King 233373970055SRussell King rtnl_lock(); 233473970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 233573970055SRussell King rtnl_unlock(); 233673970055SRussell King } 233773970055SRussell King 233873970055SRussell King static void sfp_check_state(struct sfp *sfp) 233973970055SRussell King { 234073970055SRussell King unsigned int state, i, changed; 234173970055SRussell King 23422158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 234373970055SRussell King state = sfp_get_state(sfp); 234473970055SRussell King changed = state ^ sfp->state; 234573970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 234673970055SRussell King 234773970055SRussell King for (i = 0; i < GPIO_MAX; i++) 234873970055SRussell King if (changed & BIT(i)) 234973970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 235073970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 235173970055SRussell King 235273970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 235373970055SRussell King sfp->state = state; 235473970055SRussell King 235573970055SRussell King rtnl_lock(); 235673970055SRussell King if (changed & SFP_F_PRESENT) 235773970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 235873970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 235973970055SRussell King 236073970055SRussell King if (changed & SFP_F_TX_FAULT) 236173970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 236273970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 236373970055SRussell King 236473970055SRussell King if (changed & SFP_F_LOS) 236573970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 236673970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 236773970055SRussell King rtnl_unlock(); 23682158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 236973970055SRussell King } 237073970055SRussell King 237173970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 237273970055SRussell King { 237373970055SRussell King struct sfp *sfp = data; 237473970055SRussell King 237573970055SRussell King sfp_check_state(sfp); 237673970055SRussell King 237773970055SRussell King return IRQ_HANDLED; 237873970055SRussell King } 237973970055SRussell King 238073970055SRussell King static void sfp_poll(struct work_struct *work) 238173970055SRussell King { 238273970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 238373970055SRussell King 238473970055SRussell King sfp_check_state(sfp); 2385f3c9a666SRussell King 2386f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2387f3c9a666SRussell King sfp->need_poll) 238873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 238973970055SRussell King } 239073970055SRussell King 239173970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 239273970055SRussell King { 239373970055SRussell King struct sfp *sfp; 239473970055SRussell King 239573970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 239673970055SRussell King if (!sfp) 239773970055SRussell King return ERR_PTR(-ENOMEM); 239873970055SRussell King 239973970055SRussell King sfp->dev = dev; 240073970055SRussell King 240173970055SRussell King mutex_init(&sfp->sm_mutex); 24022158e856SRobert Hancock mutex_init(&sfp->st_mutex); 240373970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 240473970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 240573970055SRussell King 2406139d3a21SRussell King sfp_hwmon_init(sfp); 2407139d3a21SRussell King 240873970055SRussell King return sfp; 240973970055SRussell King } 241073970055SRussell King 241173970055SRussell King static void sfp_cleanup(void *data) 241273970055SRussell King { 241373970055SRussell King struct sfp *sfp = data; 241473970055SRussell King 2415139d3a21SRussell King sfp_hwmon_exit(sfp); 2416139d3a21SRussell King 241773970055SRussell King cancel_delayed_work_sync(&sfp->poll); 241873970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 241973970055SRussell King if (sfp->i2c_mii) { 242073970055SRussell King mdiobus_unregister(sfp->i2c_mii); 242173970055SRussell King mdiobus_free(sfp->i2c_mii); 242273970055SRussell King } 242373970055SRussell King if (sfp->i2c) 242473970055SRussell King i2c_put_adapter(sfp->i2c); 242573970055SRussell King kfree(sfp); 242673970055SRussell King } 242773970055SRussell King 242873970055SRussell King static int sfp_probe(struct platform_device *pdev) 242973970055SRussell King { 2430259c8618SRussell King const struct sff_data *sff; 24317ce236faSRuslan Babayev struct i2c_adapter *i2c; 24325411ca71SChris Healy char *sfp_irq_name; 243373970055SRussell King struct sfp *sfp; 2434257c2559SRobert Hancock int err, i; 243573970055SRussell King 243673970055SRussell King sfp = sfp_alloc(&pdev->dev); 243773970055SRussell King if (IS_ERR(sfp)) 243873970055SRussell King return PTR_ERR(sfp); 243973970055SRussell King 244073970055SRussell King platform_set_drvdata(pdev, sfp); 244173970055SRussell King 244273970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 244373970055SRussell King if (err < 0) 244473970055SRussell King return err; 244573970055SRussell King 2446259c8618SRussell King sff = sfp->type = &sfp_data; 2447259c8618SRussell King 244873970055SRussell King if (pdev->dev.of_node) { 244973970055SRussell King struct device_node *node = pdev->dev.of_node; 2450259c8618SRussell King const struct of_device_id *id; 245173970055SRussell King struct device_node *np; 245273970055SRussell King 2453259c8618SRussell King id = of_match_node(sfp_of_match, node); 2454259c8618SRussell King if (WARN_ON(!id)) 2455259c8618SRussell King return -EINVAL; 2456259c8618SRussell King 2457259c8618SRussell King sff = sfp->type = id->data; 2458259c8618SRussell King 245973970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 246066ede1f9SAntoine Tenart if (!np) { 246166ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 246266ede1f9SAntoine Tenart return -ENODEV; 246366ede1f9SAntoine Tenart } 246473970055SRussell King 246573970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 246673970055SRussell King of_node_put(np); 24677ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 24687ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 24697ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 24707ce236faSRuslan Babayev struct fwnode_reference_args args; 24717ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 24727ce236faSRuslan Babayev int ret; 24737ce236faSRuslan Babayev 24747ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 24751086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 24767ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 24777ce236faSRuslan Babayev return -ENODEV; 24787ce236faSRuslan Babayev } 24797ce236faSRuslan Babayev 24807ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 24817ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 24827ce236faSRuslan Babayev } else { 24837ce236faSRuslan Babayev return -EINVAL; 24847ce236faSRuslan Babayev } 24857ce236faSRuslan Babayev 248673970055SRussell King if (!i2c) 248773970055SRussell King return -EPROBE_DEFER; 248873970055SRussell King 248973970055SRussell King err = sfp_i2c_configure(sfp, i2c); 249073970055SRussell King if (err < 0) { 249173970055SRussell King i2c_put_adapter(i2c); 249273970055SRussell King return err; 249373970055SRussell King } 249473970055SRussell King 2495259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2496259c8618SRussell King if (sff->gpios & BIT(i)) { 249773970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 249873970055SRussell King gpio_of_names[i], gpio_flags[i]); 249973970055SRussell King if (IS_ERR(sfp->gpio[i])) 250073970055SRussell King return PTR_ERR(sfp->gpio[i]); 250173970055SRussell King } 250273970055SRussell King 250373970055SRussell King sfp->get_state = sfp_gpio_get_state; 250473970055SRussell King sfp->set_state = sfp_gpio_set_state; 2505259c8618SRussell King 2506259c8618SRussell King /* Modules that have no detect signal are always present */ 2507259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2508259c8618SRussell King sfp->get_state = sff_gpio_get_state; 250973970055SRussell King 25103bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 25113bb35261SJon Nettleton &sfp->max_power_mW); 25123bb35261SJon Nettleton if (!sfp->max_power_mW) 25133bb35261SJon Nettleton sfp->max_power_mW = 1000; 25143bb35261SJon Nettleton 25153bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 25163bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 25173bb35261SJon Nettleton 251873970055SRussell King /* Get the initial state, and always signal TX disable, 251973970055SRussell King * since the network interface will not be up. 252073970055SRussell King */ 252173970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 252273970055SRussell King 252373970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 252473970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 252573970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 252673970055SRussell King sfp_set_state(sfp, sfp->state); 252773970055SRussell King sfp_module_tx_disable(sfp); 252873f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 252973f5e847SRussell King rtnl_lock(); 253073f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 253173f5e847SRussell King rtnl_unlock(); 253273f5e847SRussell King } 253373970055SRussell King 253473970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 253573970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 253673970055SRussell King continue; 253773970055SRussell King 2538257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 253996216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 254096216181SYueHaibing sfp->gpio_irq[i] = 0; 2541f3c9a666SRussell King sfp->need_poll = true; 254273970055SRussell King continue; 254373970055SRussell King } 254473970055SRussell King 25455411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 25465411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 25475411ca71SChris Healy gpio_of_names[i]); 25485411ca71SChris Healy 25498cb601f1SChris Healy if (!sfp_irq_name) 25508cb601f1SChris Healy return -ENOMEM; 25518cb601f1SChris Healy 2552257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2553257c2559SRobert Hancock NULL, sfp_irq, 255473970055SRussell King IRQF_ONESHOT | 255573970055SRussell King IRQF_TRIGGER_RISING | 255673970055SRussell King IRQF_TRIGGER_FALLING, 25575411ca71SChris Healy sfp_irq_name, sfp); 2558257c2559SRobert Hancock if (err) { 2559257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2560f3c9a666SRussell King sfp->need_poll = true; 256173970055SRussell King } 2562257c2559SRobert Hancock } 256373970055SRussell King 2564f3c9a666SRussell King if (sfp->need_poll) 256573970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 256673970055SRussell King 2567a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2568a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2569a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2570a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2571a1f5d1f0SAntoine Tenart */ 2572a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2573a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2574a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2575a1f5d1f0SAntoine Tenart 2576b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2577b5bfc21aSRussell King if (!sfp->sfp_bus) 2578b5bfc21aSRussell King return -ENOMEM; 2579b5bfc21aSRussell King 25809cc8976cSRussell King sfp_debugfs_init(sfp); 25819cc8976cSRussell King 258273970055SRussell King return 0; 258373970055SRussell King } 258473970055SRussell King 258573970055SRussell King static int sfp_remove(struct platform_device *pdev) 258673970055SRussell King { 258773970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 258873970055SRussell King 25899cc8976cSRussell King sfp_debugfs_exit(sfp); 259073970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 259173970055SRussell King 25920cb96b57SRussell King rtnl_lock(); 25930cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 25940cb96b57SRussell King rtnl_unlock(); 25950cb96b57SRussell King 259673970055SRussell King return 0; 259773970055SRussell King } 259873970055SRussell King 2599257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2600257c2559SRobert Hancock { 2601257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2602257c2559SRobert Hancock int i; 2603257c2559SRobert Hancock 2604257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2605257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2606257c2559SRobert Hancock continue; 2607257c2559SRobert Hancock 2608257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2609257c2559SRobert Hancock } 2610257c2559SRobert Hancock 2611257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2612257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2613257c2559SRobert Hancock } 2614257c2559SRobert Hancock 261573970055SRussell King static struct platform_driver sfp_driver = { 261673970055SRussell King .probe = sfp_probe, 261773970055SRussell King .remove = sfp_remove, 2618257c2559SRobert Hancock .shutdown = sfp_shutdown, 261973970055SRussell King .driver = { 262073970055SRussell King .name = "sfp", 262173970055SRussell King .of_match_table = sfp_of_match, 262273970055SRussell King }, 262373970055SRussell King }; 262473970055SRussell King 262573970055SRussell King static int sfp_init(void) 262673970055SRussell King { 262773970055SRussell King poll_jiffies = msecs_to_jiffies(100); 262873970055SRussell King 262973970055SRussell King return platform_driver_register(&sfp_driver); 263073970055SRussell King } 263173970055SRussell King module_init(sfp_init); 263273970055SRussell King 263373970055SRussell King static void sfp_exit(void) 263473970055SRussell King { 263573970055SRussell King platform_driver_unregister(&sfp_driver); 263673970055SRussell King } 263773970055SRussell King module_exit(sfp_exit); 263873970055SRussell King 263973970055SRussell King MODULE_ALIAS("platform:sfp"); 264073970055SRussell King MODULE_AUTHOR("Russell King"); 264173970055SRussell King MODULE_LICENSE("GPL v2"); 2642