1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 27ce236faSRuslan Babayev #include <linux/acpi.h> 31323061aSAndrew Lunn #include <linux/ctype.h> 473970055SRussell King #include <linux/delay.h> 554a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 61323061aSAndrew Lunn #include <linux/hwmon.h> 773970055SRussell King #include <linux/i2c.h> 873970055SRussell King #include <linux/interrupt.h> 973970055SRussell King #include <linux/jiffies.h> 10fcba68bdSAndrew Lunn #include <linux/mdio/mdio-i2c.h> 1173970055SRussell King #include <linux/module.h> 1273970055SRussell King #include <linux/mutex.h> 1373970055SRussell King #include <linux/of.h> 1473970055SRussell King #include <linux/phy.h> 1573970055SRussell King #include <linux/platform_device.h> 1673970055SRussell King #include <linux/rtnetlink.h> 1773970055SRussell King #include <linux/slab.h> 1873970055SRussell King #include <linux/workqueue.h> 1973970055SRussell King 2073970055SRussell King #include "sfp.h" 2173970055SRussell King #include "swphy.h" 2273970055SRussell King 2373970055SRussell King enum { 2473970055SRussell King GPIO_MODDEF0, 2573970055SRussell King GPIO_LOS, 2673970055SRussell King GPIO_TX_FAULT, 2773970055SRussell King GPIO_TX_DISABLE, 2873970055SRussell King GPIO_RATE_SELECT, 2973970055SRussell King GPIO_MAX, 3073970055SRussell King 3173970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3273970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3373970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3473970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3573970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3673970055SRussell King 3773970055SRussell King SFP_E_INSERT = 0, 3873970055SRussell King SFP_E_REMOVE, 396b0da5c9SRussell King SFP_E_DEV_ATTACH, 406b0da5c9SRussell King SFP_E_DEV_DETACH, 4173970055SRussell King SFP_E_DEV_DOWN, 4273970055SRussell King SFP_E_DEV_UP, 4373970055SRussell King SFP_E_TX_FAULT, 4473970055SRussell King SFP_E_TX_CLEAR, 4573970055SRussell King SFP_E_LOS_HIGH, 4673970055SRussell King SFP_E_LOS_LOW, 4773970055SRussell King SFP_E_TIMEOUT, 4873970055SRussell King 4973970055SRussell King SFP_MOD_EMPTY = 0, 5073f5e847SRussell King SFP_MOD_ERROR, 5173970055SRussell King SFP_MOD_PROBE, 5273f5e847SRussell King SFP_MOD_WAITDEV, 533bb35261SJon Nettleton SFP_MOD_HPOWER, 54b036a554SRussell King SFP_MOD_WAITPWR, 5573970055SRussell King SFP_MOD_PRESENT, 5673970055SRussell King 576b0da5c9SRussell King SFP_DEV_DETACHED = 0, 586b0da5c9SRussell King SFP_DEV_DOWN, 5973970055SRussell King SFP_DEV_UP, 6073970055SRussell King 6173970055SRussell King SFP_S_DOWN = 0, 6274c551caSRussell King SFP_S_FAIL, 63eefa6f1fSRussell King SFP_S_WAIT, 6473970055SRussell King SFP_S_INIT, 651cb89a14SRussell King SFP_S_INIT_PHY, 66d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6773970055SRussell King SFP_S_WAIT_LOS, 6873970055SRussell King SFP_S_LINK_UP, 6973970055SRussell King SFP_S_TX_FAULT, 7073970055SRussell King SFP_S_REINIT, 7173970055SRussell King SFP_S_TX_DISABLE, 7273970055SRussell King }; 7373970055SRussell King 744005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 754005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7673f5e847SRussell King [SFP_MOD_ERROR] = "error", 774005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7873f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 794005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 80b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 814005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 824005a7cbSAndrew Lunn }; 834005a7cbSAndrew Lunn 844005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 854005a7cbSAndrew Lunn { 864005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 874005a7cbSAndrew Lunn return "Unknown module state"; 884005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 894005a7cbSAndrew Lunn } 904005a7cbSAndrew Lunn 914005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 926b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 934005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 944005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 954005a7cbSAndrew Lunn }; 964005a7cbSAndrew Lunn 974005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 984005a7cbSAndrew Lunn { 994005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 1004005a7cbSAndrew Lunn return "Unknown device state"; 1014005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1024005a7cbSAndrew Lunn } 1034005a7cbSAndrew Lunn 1044005a7cbSAndrew Lunn static const char * const event_strings[] = { 1054005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1064005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1076b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1086b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1094005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1104005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1114005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1124005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1134005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1144005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1154005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1164005a7cbSAndrew Lunn }; 1174005a7cbSAndrew Lunn 1184005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1194005a7cbSAndrew Lunn { 1204005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1214005a7cbSAndrew Lunn return "Unknown event"; 1224005a7cbSAndrew Lunn return event_strings[event]; 1234005a7cbSAndrew Lunn } 1244005a7cbSAndrew Lunn 1254005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1264005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 12774c551caSRussell King [SFP_S_FAIL] = "fail", 128eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1294005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1301cb89a14SRussell King [SFP_S_INIT_PHY] = "init_phy", 131d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1324005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1334005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1344005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1354005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 1364005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_disable", 1374005a7cbSAndrew Lunn }; 1384005a7cbSAndrew Lunn 1394005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1404005a7cbSAndrew Lunn { 1414005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1424005a7cbSAndrew Lunn return "Unknown state"; 1434005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1444005a7cbSAndrew Lunn } 1454005a7cbSAndrew Lunn 14673970055SRussell King static const char *gpio_of_names[] = { 14725ee0793SBaruch Siach "mod-def0", 14873970055SRussell King "los", 14973970055SRussell King "tx-fault", 15073970055SRussell King "tx-disable", 15125ee0793SBaruch Siach "rate-select0", 15273970055SRussell King }; 15373970055SRussell King 15473970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15573970055SRussell King GPIOD_IN, 15673970055SRussell King GPIOD_IN, 15773970055SRussell King GPIOD_IN, 15873970055SRussell King GPIOD_ASIS, 15973970055SRussell King GPIOD_ASIS, 16073970055SRussell King }; 16173970055SRussell King 16226c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16326c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16426c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 16526c97a2dSRussell King * on board (for a copper SFP) time to initialise. 16626c97a2dSRussell King */ 167eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 16826c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 16926c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 17026c97a2dSRussell King 17126c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17226c97a2dSRussell King * an indicated TX_FAULT. 17326c97a2dSRussell King */ 17473970055SRussell King #define T_RESET_US 10 17573970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 17673970055SRussell King 17765ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 17865ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 17965ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 18065ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 18165ef2d5cSRussell King */ 18265ef2d5cSRussell King #define N_FAULT_INIT 5 18365ef2d5cSRussell King #define N_FAULT 5 18465ef2d5cSRussell King 1851cb89a14SRussell King /* T_PHY_RETRY is the time interval between attempts to probe the PHY. 1861cb89a14SRussell King * R_PHY_RETRY is the number of attempts. 1871cb89a14SRussell King */ 1881cb89a14SRussell King #define T_PHY_RETRY msecs_to_jiffies(50) 1891cb89a14SRussell King #define R_PHY_RETRY 12 1901cb89a14SRussell King 19173970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 19273970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 19373970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 19473970055SRussell King * 195d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 196d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 19773970055SRussell King */ 198d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 1993bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 200e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 201e117be74SRussell King #define R_PROBE_RETRY_INIT 10 202e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 203e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 20473970055SRussell King 205516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 20673970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 20773970055SRussell King */ 20873970055SRussell King #define SFP_PHY_ADDR 22 20973970055SRussell King 210259c8618SRussell King struct sff_data { 211259c8618SRussell King unsigned int gpios; 212259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 213259c8618SRussell King }; 214259c8618SRussell King 21573970055SRussell King struct sfp { 21673970055SRussell King struct device *dev; 21773970055SRussell King struct i2c_adapter *i2c; 21873970055SRussell King struct mii_bus *i2c_mii; 21973970055SRussell King struct sfp_bus *sfp_bus; 22073970055SRussell King struct phy_device *mod_phy; 221259c8618SRussell King const struct sff_data *type; 2223bb35261SJon Nettleton u32 max_power_mW; 22373970055SRussell King 22473970055SRussell King unsigned int (*get_state)(struct sfp *); 22573970055SRussell King void (*set_state)(struct sfp *, unsigned int); 22673970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2273bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 22873970055SRussell King 22973970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 230257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 23173970055SRussell King 232f3c9a666SRussell King bool need_poll; 233f3c9a666SRussell King 2342158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 235f3c9a666SRussell King unsigned int state_soft_mask; 23673970055SRussell King unsigned int state; 23773970055SRussell King struct delayed_work poll; 23873970055SRussell King struct delayed_work timeout; 2392158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 24073970055SRussell King unsigned char sm_mod_state; 241e117be74SRussell King unsigned char sm_mod_tries_init; 242e117be74SRussell King unsigned char sm_mod_tries; 24373970055SRussell King unsigned char sm_dev_state; 24473970055SRussell King unsigned short sm_state; 245281e4eabSRussell King unsigned char sm_fault_retries; 2461cb89a14SRussell King unsigned char sm_phy_retries; 24773970055SRussell King 24873970055SRussell King struct sfp_eeprom_id id; 249ed32abb1SRussell King unsigned int module_power_mW; 25026c97a2dSRussell King unsigned int module_t_start_up; 251ed32abb1SRussell King 2521323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2531323061aSAndrew Lunn struct sfp_diag diag; 254139d3a21SRussell King struct delayed_work hwmon_probe; 255139d3a21SRussell King unsigned int hwmon_tries; 2561323061aSAndrew Lunn struct device *hwmon_dev; 2571323061aSAndrew Lunn char *hwmon_name; 2581323061aSAndrew Lunn #endif 2591323061aSAndrew Lunn 26073970055SRussell King }; 26173970055SRussell King 262259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 263259c8618SRussell King { 2640fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 265259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 266259c8618SRussell King } 267259c8618SRussell King 268259c8618SRussell King static const struct sff_data sff_data = { 269259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 270259c8618SRussell King .module_supported = sff_module_supported, 271259c8618SRussell King }; 272259c8618SRussell King 273259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 274259c8618SRussell King { 2750fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFP && 276259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 277259c8618SRussell King } 278259c8618SRussell King 279259c8618SRussell King static const struct sff_data sfp_data = { 280259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 281259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 282259c8618SRussell King .module_supported = sfp_module_supported, 283259c8618SRussell King }; 284259c8618SRussell King 285259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 286259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 287259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 288259c8618SRussell King { }, 289259c8618SRussell King }; 290259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 291259c8618SRussell King 29273970055SRussell King static unsigned long poll_jiffies; 29373970055SRussell King 29473970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 29573970055SRussell King { 29673970055SRussell King unsigned int i, state, v; 29773970055SRussell King 29873970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 29973970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 30073970055SRussell King continue; 30173970055SRussell King 30273970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 30373970055SRussell King if (v) 30473970055SRussell King state |= BIT(i); 30573970055SRussell King } 30673970055SRussell King 30773970055SRussell King return state; 30873970055SRussell King } 30973970055SRussell King 310259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 311259c8618SRussell King { 312259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 313259c8618SRussell King } 314259c8618SRussell King 31573970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 31673970055SRussell King { 31773970055SRussell King if (state & SFP_F_PRESENT) { 31873970055SRussell King /* If the module is present, drive the signals */ 31973970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 32073970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 32173970055SRussell King state & SFP_F_TX_DISABLE); 32273970055SRussell King if (state & SFP_F_RATE_SELECT) 32373970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 32473970055SRussell King state & SFP_F_RATE_SELECT); 32573970055SRussell King } else { 32673970055SRussell King /* Otherwise, let them float to the pull-ups */ 32773970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 32873970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 32973970055SRussell King if (state & SFP_F_RATE_SELECT) 33073970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 33173970055SRussell King } 33273970055SRussell King } 33373970055SRussell King 3343bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3353bb35261SJon Nettleton size_t len) 33673970055SRussell King { 33773970055SRussell King struct i2c_msg msgs[2]; 3383bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 33928e74a7cSRussell King size_t this_len; 34073970055SRussell King int ret; 34173970055SRussell King 34273970055SRussell King msgs[0].addr = bus_addr; 34373970055SRussell King msgs[0].flags = 0; 34473970055SRussell King msgs[0].len = 1; 34573970055SRussell King msgs[0].buf = &dev_addr; 34673970055SRussell King msgs[1].addr = bus_addr; 34773970055SRussell King msgs[1].flags = I2C_M_RD; 34873970055SRussell King msgs[1].len = len; 34973970055SRussell King msgs[1].buf = buf; 35073970055SRussell King 35128e74a7cSRussell King while (len) { 35228e74a7cSRussell King this_len = len; 35328e74a7cSRussell King if (this_len > 16) 35428e74a7cSRussell King this_len = 16; 35528e74a7cSRussell King 35628e74a7cSRussell King msgs[1].len = this_len; 35728e74a7cSRussell King 3583bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 35973970055SRussell King if (ret < 0) 36073970055SRussell King return ret; 36173970055SRussell King 36228e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 36328e74a7cSRussell King break; 36428e74a7cSRussell King 36528e74a7cSRussell King msgs[1].buf += this_len; 36628e74a7cSRussell King dev_addr += this_len; 36728e74a7cSRussell King len -= this_len; 36828e74a7cSRussell King } 36928e74a7cSRussell King 37028e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 37173970055SRussell King } 37273970055SRussell King 3733bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 37473970055SRussell King size_t len) 37573970055SRussell King { 3763bb35261SJon Nettleton struct i2c_msg msgs[1]; 3773bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3783bb35261SJon Nettleton int ret; 3793bb35261SJon Nettleton 3803bb35261SJon Nettleton msgs[0].addr = bus_addr; 3813bb35261SJon Nettleton msgs[0].flags = 0; 3823bb35261SJon Nettleton msgs[0].len = 1 + len; 3833bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3843bb35261SJon Nettleton if (!msgs[0].buf) 3853bb35261SJon Nettleton return -ENOMEM; 3863bb35261SJon Nettleton 3873bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3883bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3893bb35261SJon Nettleton 3903bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3913bb35261SJon Nettleton 3923bb35261SJon Nettleton kfree(msgs[0].buf); 3933bb35261SJon Nettleton 3943bb35261SJon Nettleton if (ret < 0) 3953bb35261SJon Nettleton return ret; 3963bb35261SJon Nettleton 3973bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 39873970055SRussell King } 39973970055SRussell King 40073970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 40173970055SRussell King { 40273970055SRussell King struct mii_bus *i2c_mii; 40373970055SRussell King int ret; 40473970055SRussell King 40573970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 40673970055SRussell King return -EINVAL; 40773970055SRussell King 40873970055SRussell King sfp->i2c = i2c; 40973970055SRussell King sfp->read = sfp_i2c_read; 4103bb35261SJon Nettleton sfp->write = sfp_i2c_write; 41173970055SRussell King 41273970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 41373970055SRussell King if (IS_ERR(i2c_mii)) 41473970055SRussell King return PTR_ERR(i2c_mii); 41573970055SRussell King 41673970055SRussell King i2c_mii->name = "SFP I2C Bus"; 41773970055SRussell King i2c_mii->phy_mask = ~0; 41873970055SRussell King 41973970055SRussell King ret = mdiobus_register(i2c_mii); 42073970055SRussell King if (ret < 0) { 42173970055SRussell King mdiobus_free(i2c_mii); 42273970055SRussell King return ret; 42373970055SRussell King } 42473970055SRussell King 42573970055SRussell King sfp->i2c_mii = i2c_mii; 42673970055SRussell King 42773970055SRussell King return 0; 42873970055SRussell King } 42973970055SRussell King 43073970055SRussell King /* Interface */ 43173970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 43273970055SRussell King { 43373970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 43473970055SRussell King } 43573970055SRussell King 4363bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4373bb35261SJon Nettleton { 4383bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4393bb35261SJon Nettleton } 4403bb35261SJon Nettleton 441f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 442f3c9a666SRussell King { 443f3c9a666SRussell King unsigned int state = 0; 444f3c9a666SRussell King u8 status; 4450dea4d03SRussell King int ret; 446f3c9a666SRussell King 4470dea4d03SRussell King ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); 4480dea4d03SRussell King if (ret == sizeof(status)) { 449f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 450f3c9a666SRussell King state |= SFP_F_LOS; 451f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 452f3c9a666SRussell King state |= SFP_F_TX_FAULT; 4530dea4d03SRussell King } else { 4540dea4d03SRussell King dev_err_ratelimited(sfp->dev, 4550dea4d03SRussell King "failed to read SFP soft status: %d\n", 4560dea4d03SRussell King ret); 4570dea4d03SRussell King /* Preserve the current state */ 4580dea4d03SRussell King state = sfp->state; 459f3c9a666SRussell King } 460f3c9a666SRussell King 461f3c9a666SRussell King return state & sfp->state_soft_mask; 462f3c9a666SRussell King } 463f3c9a666SRussell King 464f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 465f3c9a666SRussell King { 466f3c9a666SRussell King u8 status; 467f3c9a666SRussell King 468f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 469f3c9a666SRussell King sizeof(status)) { 470f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 471f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 472f3c9a666SRussell King else 473f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 474f3c9a666SRussell King 475f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 476f3c9a666SRussell King } 477f3c9a666SRussell King } 478f3c9a666SRussell King 479f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 480f3c9a666SRussell King { 481f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 482f3c9a666SRussell King 483f3c9a666SRussell King sfp->state_soft_mask = 0; 484f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && 485f3c9a666SRussell King !sfp->gpio[GPIO_TX_DISABLE]) 486f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_DISABLE; 487f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && 488f3c9a666SRussell King !sfp->gpio[GPIO_TX_FAULT]) 489f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_FAULT; 490f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && 491f3c9a666SRussell King !sfp->gpio[GPIO_LOS]) 492f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_LOS; 493f3c9a666SRussell King 494f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 495f3c9a666SRussell King !sfp->need_poll) 496f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 497f3c9a666SRussell King } 498f3c9a666SRussell King 499f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 500f3c9a666SRussell King { 501f3c9a666SRussell King sfp->state_soft_mask = 0; 502f3c9a666SRussell King } 503f3c9a666SRussell King 504f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 505f3c9a666SRussell King { 506f3c9a666SRussell King unsigned int state = sfp->get_state(sfp); 507f3c9a666SRussell King 508f3c9a666SRussell King if (state & SFP_F_PRESENT && 509f3c9a666SRussell King sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) 510f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 511f3c9a666SRussell King 512f3c9a666SRussell King return state; 513f3c9a666SRussell King } 514f3c9a666SRussell King 515f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 516f3c9a666SRussell King { 517f3c9a666SRussell King sfp->set_state(sfp, state); 518f3c9a666SRussell King 519f3c9a666SRussell King if (state & SFP_F_PRESENT && 520f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 521f3c9a666SRussell King sfp_soft_set_state(sfp, state); 522f3c9a666SRussell King } 523f3c9a666SRussell King 52473970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 52573970055SRussell King { 52673970055SRussell King u8 *p, check; 52773970055SRussell King 52873970055SRussell King for (p = buf, check = 0; len; p++, len--) 52973970055SRussell King check += *p; 53073970055SRussell King 53173970055SRussell King return check; 53273970055SRussell King } 53373970055SRussell King 5341323061aSAndrew Lunn /* hwmon */ 5351323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 5361323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5371323061aSAndrew Lunn enum hwmon_sensor_types type, 5381323061aSAndrew Lunn u32 attr, int channel) 5391323061aSAndrew Lunn { 5401323061aSAndrew Lunn const struct sfp *sfp = data; 5411323061aSAndrew Lunn 5421323061aSAndrew Lunn switch (type) { 5431323061aSAndrew Lunn case hwmon_temp: 5441323061aSAndrew Lunn switch (attr) { 5451323061aSAndrew Lunn case hwmon_temp_min_alarm: 5461323061aSAndrew Lunn case hwmon_temp_max_alarm: 5471323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5481323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5491323061aSAndrew Lunn case hwmon_temp_min: 5501323061aSAndrew Lunn case hwmon_temp_max: 5511323061aSAndrew Lunn case hwmon_temp_lcrit: 5521323061aSAndrew Lunn case hwmon_temp_crit: 553a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 554a33710bdSAndrew Lunn return 0; 555df561f66SGustavo A. R. Silva fallthrough; 556a33710bdSAndrew Lunn case hwmon_temp_input: 557c1236979SAndrew Lunn case hwmon_temp_label: 5581323061aSAndrew Lunn return 0444; 5591323061aSAndrew Lunn default: 5601323061aSAndrew Lunn return 0; 5611323061aSAndrew Lunn } 5621323061aSAndrew Lunn case hwmon_in: 5631323061aSAndrew Lunn switch (attr) { 5641323061aSAndrew Lunn case hwmon_in_min_alarm: 5651323061aSAndrew Lunn case hwmon_in_max_alarm: 5661323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5671323061aSAndrew Lunn case hwmon_in_crit_alarm: 5681323061aSAndrew Lunn case hwmon_in_min: 5691323061aSAndrew Lunn case hwmon_in_max: 5701323061aSAndrew Lunn case hwmon_in_lcrit: 5711323061aSAndrew Lunn case hwmon_in_crit: 572a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 573a33710bdSAndrew Lunn return 0; 574df561f66SGustavo A. R. Silva fallthrough; 575a33710bdSAndrew Lunn case hwmon_in_input: 576c1236979SAndrew Lunn case hwmon_in_label: 5771323061aSAndrew Lunn return 0444; 5781323061aSAndrew Lunn default: 5791323061aSAndrew Lunn return 0; 5801323061aSAndrew Lunn } 5811323061aSAndrew Lunn case hwmon_curr: 5821323061aSAndrew Lunn switch (attr) { 5831323061aSAndrew Lunn case hwmon_curr_min_alarm: 5841323061aSAndrew Lunn case hwmon_curr_max_alarm: 5851323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 5861323061aSAndrew Lunn case hwmon_curr_crit_alarm: 5871323061aSAndrew Lunn case hwmon_curr_min: 5881323061aSAndrew Lunn case hwmon_curr_max: 5891323061aSAndrew Lunn case hwmon_curr_lcrit: 5901323061aSAndrew Lunn case hwmon_curr_crit: 591a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 592a33710bdSAndrew Lunn return 0; 593df561f66SGustavo A. R. Silva fallthrough; 594a33710bdSAndrew Lunn case hwmon_curr_input: 595c1236979SAndrew Lunn case hwmon_curr_label: 5961323061aSAndrew Lunn return 0444; 5971323061aSAndrew Lunn default: 5981323061aSAndrew Lunn return 0; 5991323061aSAndrew Lunn } 6001323061aSAndrew Lunn case hwmon_power: 6011323061aSAndrew Lunn /* External calibration of receive power requires 6021323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 6031323061aSAndrew Lunn * is not easy, so just skip it. If the module does 6041323061aSAndrew Lunn * not require external calibration, we can however 6051323061aSAndrew Lunn * show receiver power, since FP is then not needed. 6061323061aSAndrew Lunn */ 6071323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 6081323061aSAndrew Lunn channel == 1) 6091323061aSAndrew Lunn return 0; 6101323061aSAndrew Lunn switch (attr) { 6111323061aSAndrew Lunn case hwmon_power_min_alarm: 6121323061aSAndrew Lunn case hwmon_power_max_alarm: 6131323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 6141323061aSAndrew Lunn case hwmon_power_crit_alarm: 6151323061aSAndrew Lunn case hwmon_power_min: 6161323061aSAndrew Lunn case hwmon_power_max: 6171323061aSAndrew Lunn case hwmon_power_lcrit: 6181323061aSAndrew Lunn case hwmon_power_crit: 619a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 620a33710bdSAndrew Lunn return 0; 621df561f66SGustavo A. R. Silva fallthrough; 622a33710bdSAndrew Lunn case hwmon_power_input: 623c1236979SAndrew Lunn case hwmon_power_label: 6241323061aSAndrew Lunn return 0444; 6251323061aSAndrew Lunn default: 6261323061aSAndrew Lunn return 0; 6271323061aSAndrew Lunn } 6281323061aSAndrew Lunn default: 6291323061aSAndrew Lunn return 0; 6301323061aSAndrew Lunn } 6311323061aSAndrew Lunn } 6321323061aSAndrew Lunn 6331323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 6341323061aSAndrew Lunn { 6351323061aSAndrew Lunn __be16 val; 6361323061aSAndrew Lunn int err; 6371323061aSAndrew Lunn 6381323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6391323061aSAndrew Lunn if (err < 0) 6401323061aSAndrew Lunn return err; 6411323061aSAndrew Lunn 6421323061aSAndrew Lunn *value = be16_to_cpu(val); 6431323061aSAndrew Lunn 6441323061aSAndrew Lunn return 0; 6451323061aSAndrew Lunn } 6461323061aSAndrew Lunn 6471323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6481323061aSAndrew Lunn { 6490cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6501323061aSAndrew Lunn } 6511323061aSAndrew Lunn 6521323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6531323061aSAndrew Lunn long *value) 6541323061aSAndrew Lunn { 6551323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6561323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6571323061aSAndrew Lunn } 6581323061aSAndrew Lunn 6591323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6601323061aSAndrew Lunn { 6611323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6621323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6631323061aSAndrew Lunn 6641323061aSAndrew Lunn if (*value >= 0x8000) 6651323061aSAndrew Lunn *value -= 0x10000; 6661323061aSAndrew Lunn 6671323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6681323061aSAndrew Lunn } 6691323061aSAndrew Lunn 6701323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6711323061aSAndrew Lunn { 6721323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6731323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6741323061aSAndrew Lunn 6751323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6761323061aSAndrew Lunn } 6771323061aSAndrew Lunn 6781323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 6791323061aSAndrew Lunn { 6801323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 6811323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 6821323061aSAndrew Lunn 6831323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 6841323061aSAndrew Lunn } 6851323061aSAndrew Lunn 6861323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 6871323061aSAndrew Lunn { 6881323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 6891323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 6901323061aSAndrew Lunn 6911323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6921323061aSAndrew Lunn } 6931323061aSAndrew Lunn 6941323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 6951323061aSAndrew Lunn { 6961323061aSAndrew Lunn int err; 6971323061aSAndrew Lunn 6981323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6991323061aSAndrew Lunn if (err < 0) 7001323061aSAndrew Lunn return err; 7011323061aSAndrew Lunn 7021323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7031323061aSAndrew Lunn 7041323061aSAndrew Lunn return 0; 7051323061aSAndrew Lunn } 7061323061aSAndrew Lunn 7071323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 7081323061aSAndrew Lunn { 7091323061aSAndrew Lunn int err; 7101323061aSAndrew Lunn 7111323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7121323061aSAndrew Lunn if (err < 0) 7131323061aSAndrew Lunn return err; 7141323061aSAndrew Lunn 7151323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn return 0; 7181323061aSAndrew Lunn } 7191323061aSAndrew Lunn 7201323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 7211323061aSAndrew Lunn { 7221323061aSAndrew Lunn int err; 7231323061aSAndrew Lunn 7241323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7251323061aSAndrew Lunn if (err < 0) 7261323061aSAndrew Lunn return err; 7271323061aSAndrew Lunn 7281323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn return 0; 7311323061aSAndrew Lunn } 7321323061aSAndrew Lunn 7331323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 7341323061aSAndrew Lunn { 7351323061aSAndrew Lunn int err; 7361323061aSAndrew Lunn 7371323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7381323061aSAndrew Lunn if (err < 0) 7391323061aSAndrew Lunn return err; 7401323061aSAndrew Lunn 7411323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn return 0; 7441323061aSAndrew Lunn } 7451323061aSAndrew Lunn 7461323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7471323061aSAndrew Lunn { 7481323061aSAndrew Lunn int err; 7491323061aSAndrew Lunn 7501323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7511323061aSAndrew Lunn if (err < 0) 7521323061aSAndrew Lunn return err; 7531323061aSAndrew Lunn 7541323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7551323061aSAndrew Lunn 7561323061aSAndrew Lunn return 0; 7571323061aSAndrew Lunn } 7581323061aSAndrew Lunn 7591323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7601323061aSAndrew Lunn { 7611323061aSAndrew Lunn u8 status; 7621323061aSAndrew Lunn int err; 7631323061aSAndrew Lunn 7641323061aSAndrew Lunn switch (attr) { 7651323061aSAndrew Lunn case hwmon_temp_input: 7661323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7671323061aSAndrew Lunn 7681323061aSAndrew Lunn case hwmon_temp_lcrit: 7691323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7701323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7711323061aSAndrew Lunn return 0; 7721323061aSAndrew Lunn 7731323061aSAndrew Lunn case hwmon_temp_min: 7741323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7751323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7761323061aSAndrew Lunn return 0; 7771323061aSAndrew Lunn case hwmon_temp_max: 7781323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 7791323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7801323061aSAndrew Lunn return 0; 7811323061aSAndrew Lunn 7821323061aSAndrew Lunn case hwmon_temp_crit: 7831323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 7841323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7851323061aSAndrew Lunn return 0; 7861323061aSAndrew Lunn 7871323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7881323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7891323061aSAndrew Lunn if (err < 0) 7901323061aSAndrew Lunn return err; 7911323061aSAndrew Lunn 7921323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 7931323061aSAndrew Lunn return 0; 7941323061aSAndrew Lunn 7951323061aSAndrew Lunn case hwmon_temp_min_alarm: 7961323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7971323061aSAndrew Lunn if (err < 0) 7981323061aSAndrew Lunn return err; 7991323061aSAndrew Lunn 8001323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 8011323061aSAndrew Lunn return 0; 8021323061aSAndrew Lunn 8031323061aSAndrew Lunn case hwmon_temp_max_alarm: 8041323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8051323061aSAndrew Lunn if (err < 0) 8061323061aSAndrew Lunn return err; 8071323061aSAndrew Lunn 8081323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 8091323061aSAndrew Lunn return 0; 8101323061aSAndrew Lunn 8111323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8121323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8131323061aSAndrew Lunn if (err < 0) 8141323061aSAndrew Lunn return err; 8151323061aSAndrew Lunn 8161323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 8171323061aSAndrew Lunn return 0; 8181323061aSAndrew Lunn default: 8191323061aSAndrew Lunn return -EOPNOTSUPP; 8201323061aSAndrew Lunn } 8211323061aSAndrew Lunn 8221323061aSAndrew Lunn return -EOPNOTSUPP; 8231323061aSAndrew Lunn } 8241323061aSAndrew Lunn 8251323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 8261323061aSAndrew Lunn { 8271323061aSAndrew Lunn u8 status; 8281323061aSAndrew Lunn int err; 8291323061aSAndrew Lunn 8301323061aSAndrew Lunn switch (attr) { 8311323061aSAndrew Lunn case hwmon_in_input: 8321323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 8331323061aSAndrew Lunn 8341323061aSAndrew Lunn case hwmon_in_lcrit: 8351323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 8361323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8371323061aSAndrew Lunn return 0; 8381323061aSAndrew Lunn 8391323061aSAndrew Lunn case hwmon_in_min: 8401323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8411323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8421323061aSAndrew Lunn return 0; 8431323061aSAndrew Lunn 8441323061aSAndrew Lunn case hwmon_in_max: 8451323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8461323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8471323061aSAndrew Lunn return 0; 8481323061aSAndrew Lunn 8491323061aSAndrew Lunn case hwmon_in_crit: 8501323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8511323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8521323061aSAndrew Lunn return 0; 8531323061aSAndrew Lunn 8541323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8551323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8561323061aSAndrew Lunn if (err < 0) 8571323061aSAndrew Lunn return err; 8581323061aSAndrew Lunn 8591323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8601323061aSAndrew Lunn return 0; 8611323061aSAndrew Lunn 8621323061aSAndrew Lunn case hwmon_in_min_alarm: 8631323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8641323061aSAndrew Lunn if (err < 0) 8651323061aSAndrew Lunn return err; 8661323061aSAndrew Lunn 8671323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 8681323061aSAndrew Lunn return 0; 8691323061aSAndrew Lunn 8701323061aSAndrew Lunn case hwmon_in_max_alarm: 8711323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8721323061aSAndrew Lunn if (err < 0) 8731323061aSAndrew Lunn return err; 8741323061aSAndrew Lunn 8751323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8761323061aSAndrew Lunn return 0; 8771323061aSAndrew Lunn 8781323061aSAndrew Lunn case hwmon_in_crit_alarm: 8791323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8801323061aSAndrew Lunn if (err < 0) 8811323061aSAndrew Lunn return err; 8821323061aSAndrew Lunn 8831323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 8841323061aSAndrew Lunn return 0; 8851323061aSAndrew Lunn default: 8861323061aSAndrew Lunn return -EOPNOTSUPP; 8871323061aSAndrew Lunn } 8881323061aSAndrew Lunn 8891323061aSAndrew Lunn return -EOPNOTSUPP; 8901323061aSAndrew Lunn } 8911323061aSAndrew Lunn 8921323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 8931323061aSAndrew Lunn { 8941323061aSAndrew Lunn u8 status; 8951323061aSAndrew Lunn int err; 8961323061aSAndrew Lunn 8971323061aSAndrew Lunn switch (attr) { 8981323061aSAndrew Lunn case hwmon_curr_input: 8991323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 9001323061aSAndrew Lunn 9011323061aSAndrew Lunn case hwmon_curr_lcrit: 9021323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 9031323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9041323061aSAndrew Lunn return 0; 9051323061aSAndrew Lunn 9061323061aSAndrew Lunn case hwmon_curr_min: 9071323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 9081323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9091323061aSAndrew Lunn return 0; 9101323061aSAndrew Lunn 9111323061aSAndrew Lunn case hwmon_curr_max: 9121323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 9131323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9141323061aSAndrew Lunn return 0; 9151323061aSAndrew Lunn 9161323061aSAndrew Lunn case hwmon_curr_crit: 9171323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 9181323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9191323061aSAndrew Lunn return 0; 9201323061aSAndrew Lunn 9211323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9221323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9231323061aSAndrew Lunn if (err < 0) 9241323061aSAndrew Lunn return err; 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 9271323061aSAndrew Lunn return 0; 9281323061aSAndrew Lunn 9291323061aSAndrew Lunn case hwmon_curr_min_alarm: 9301323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9311323061aSAndrew Lunn if (err < 0) 9321323061aSAndrew Lunn return err; 9331323061aSAndrew Lunn 9341323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 9351323061aSAndrew Lunn return 0; 9361323061aSAndrew Lunn 9371323061aSAndrew Lunn case hwmon_curr_max_alarm: 9381323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9391323061aSAndrew Lunn if (err < 0) 9401323061aSAndrew Lunn return err; 9411323061aSAndrew Lunn 9421323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9431323061aSAndrew Lunn return 0; 9441323061aSAndrew Lunn 9451323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9461323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9471323061aSAndrew Lunn if (err < 0) 9481323061aSAndrew Lunn return err; 9491323061aSAndrew Lunn 9501323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9511323061aSAndrew Lunn return 0; 9521323061aSAndrew Lunn default: 9531323061aSAndrew Lunn return -EOPNOTSUPP; 9541323061aSAndrew Lunn } 9551323061aSAndrew Lunn 9561323061aSAndrew Lunn return -EOPNOTSUPP; 9571323061aSAndrew Lunn } 9581323061aSAndrew Lunn 9591323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9601323061aSAndrew Lunn { 9611323061aSAndrew Lunn u8 status; 9621323061aSAndrew Lunn int err; 9631323061aSAndrew Lunn 9641323061aSAndrew Lunn switch (attr) { 9651323061aSAndrew Lunn case hwmon_power_input: 9661323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9671323061aSAndrew Lunn 9681323061aSAndrew Lunn case hwmon_power_lcrit: 9691323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9701323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9711323061aSAndrew Lunn return 0; 9721323061aSAndrew Lunn 9731323061aSAndrew Lunn case hwmon_power_min: 9741323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9751323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9761323061aSAndrew Lunn return 0; 9771323061aSAndrew Lunn 9781323061aSAndrew Lunn case hwmon_power_max: 9791323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 9801323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9811323061aSAndrew Lunn return 0; 9821323061aSAndrew Lunn 9831323061aSAndrew Lunn case hwmon_power_crit: 9841323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 9851323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9861323061aSAndrew Lunn return 0; 9871323061aSAndrew Lunn 9881323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9891323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9901323061aSAndrew Lunn if (err < 0) 9911323061aSAndrew Lunn return err; 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 9941323061aSAndrew Lunn return 0; 9951323061aSAndrew Lunn 9961323061aSAndrew Lunn case hwmon_power_min_alarm: 9971323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9981323061aSAndrew Lunn if (err < 0) 9991323061aSAndrew Lunn return err; 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 10021323061aSAndrew Lunn return 0; 10031323061aSAndrew Lunn 10041323061aSAndrew Lunn case hwmon_power_max_alarm: 10051323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 10061323061aSAndrew Lunn if (err < 0) 10071323061aSAndrew Lunn return err; 10081323061aSAndrew Lunn 10091323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 10101323061aSAndrew Lunn return 0; 10111323061aSAndrew Lunn 10121323061aSAndrew Lunn case hwmon_power_crit_alarm: 10131323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10141323061aSAndrew Lunn if (err < 0) 10151323061aSAndrew Lunn return err; 10161323061aSAndrew Lunn 10171323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 10181323061aSAndrew Lunn return 0; 10191323061aSAndrew Lunn default: 10201323061aSAndrew Lunn return -EOPNOTSUPP; 10211323061aSAndrew Lunn } 10221323061aSAndrew Lunn 10231323061aSAndrew Lunn return -EOPNOTSUPP; 10241323061aSAndrew Lunn } 10251323061aSAndrew Lunn 10261323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 10271323061aSAndrew Lunn { 10281323061aSAndrew Lunn u8 status; 10291323061aSAndrew Lunn int err; 10301323061aSAndrew Lunn 10311323061aSAndrew Lunn switch (attr) { 10321323061aSAndrew Lunn case hwmon_power_input: 10331323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 10341323061aSAndrew Lunn 10351323061aSAndrew Lunn case hwmon_power_lcrit: 10361323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10371323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10381323061aSAndrew Lunn return 0; 10391323061aSAndrew Lunn 10401323061aSAndrew Lunn case hwmon_power_min: 10411323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10421323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10431323061aSAndrew Lunn return 0; 10441323061aSAndrew Lunn 10451323061aSAndrew Lunn case hwmon_power_max: 10461323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10471323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10481323061aSAndrew Lunn return 0; 10491323061aSAndrew Lunn 10501323061aSAndrew Lunn case hwmon_power_crit: 10511323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10521323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10531323061aSAndrew Lunn return 0; 10541323061aSAndrew Lunn 10551323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10561323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10571323061aSAndrew Lunn if (err < 0) 10581323061aSAndrew Lunn return err; 10591323061aSAndrew Lunn 10601323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10611323061aSAndrew Lunn return 0; 10621323061aSAndrew Lunn 10631323061aSAndrew Lunn case hwmon_power_min_alarm: 10641323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10651323061aSAndrew Lunn if (err < 0) 10661323061aSAndrew Lunn return err; 10671323061aSAndrew Lunn 10681323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 10691323061aSAndrew Lunn return 0; 10701323061aSAndrew Lunn 10711323061aSAndrew Lunn case hwmon_power_max_alarm: 10721323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10731323061aSAndrew Lunn if (err < 0) 10741323061aSAndrew Lunn return err; 10751323061aSAndrew Lunn 10761323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 10771323061aSAndrew Lunn return 0; 10781323061aSAndrew Lunn 10791323061aSAndrew Lunn case hwmon_power_crit_alarm: 10801323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10811323061aSAndrew Lunn if (err < 0) 10821323061aSAndrew Lunn return err; 10831323061aSAndrew Lunn 10841323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 10851323061aSAndrew Lunn return 0; 10861323061aSAndrew Lunn default: 10871323061aSAndrew Lunn return -EOPNOTSUPP; 10881323061aSAndrew Lunn } 10891323061aSAndrew Lunn 10901323061aSAndrew Lunn return -EOPNOTSUPP; 10911323061aSAndrew Lunn } 10921323061aSAndrew Lunn 10931323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 10941323061aSAndrew Lunn u32 attr, int channel, long *value) 10951323061aSAndrew Lunn { 10961323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 10971323061aSAndrew Lunn 10981323061aSAndrew Lunn switch (type) { 10991323061aSAndrew Lunn case hwmon_temp: 11001323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 11011323061aSAndrew Lunn case hwmon_in: 11021323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 11031323061aSAndrew Lunn case hwmon_curr: 11041323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 11051323061aSAndrew Lunn case hwmon_power: 11061323061aSAndrew Lunn switch (channel) { 11071323061aSAndrew Lunn case 0: 11081323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 11091323061aSAndrew Lunn case 1: 11101323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 11111323061aSAndrew Lunn default: 11121323061aSAndrew Lunn return -EOPNOTSUPP; 11131323061aSAndrew Lunn } 11141323061aSAndrew Lunn default: 11151323061aSAndrew Lunn return -EOPNOTSUPP; 11161323061aSAndrew Lunn } 11171323061aSAndrew Lunn } 11181323061aSAndrew Lunn 1119c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1120c1236979SAndrew Lunn "TX_power", 1121c1236979SAndrew Lunn "RX_power", 1122c1236979SAndrew Lunn }; 1123c1236979SAndrew Lunn 1124c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1125c1236979SAndrew Lunn enum hwmon_sensor_types type, 1126c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1127c1236979SAndrew Lunn { 1128c1236979SAndrew Lunn switch (type) { 1129c1236979SAndrew Lunn case hwmon_curr: 1130c1236979SAndrew Lunn switch (attr) { 1131c1236979SAndrew Lunn case hwmon_curr_label: 1132c1236979SAndrew Lunn *str = "bias"; 1133c1236979SAndrew Lunn return 0; 1134c1236979SAndrew Lunn default: 1135c1236979SAndrew Lunn return -EOPNOTSUPP; 1136c1236979SAndrew Lunn } 1137c1236979SAndrew Lunn break; 1138c1236979SAndrew Lunn case hwmon_temp: 1139c1236979SAndrew Lunn switch (attr) { 1140c1236979SAndrew Lunn case hwmon_temp_label: 1141c1236979SAndrew Lunn *str = "temperature"; 1142c1236979SAndrew Lunn return 0; 1143c1236979SAndrew Lunn default: 1144c1236979SAndrew Lunn return -EOPNOTSUPP; 1145c1236979SAndrew Lunn } 1146c1236979SAndrew Lunn break; 1147c1236979SAndrew Lunn case hwmon_in: 1148c1236979SAndrew Lunn switch (attr) { 1149c1236979SAndrew Lunn case hwmon_in_label: 1150c1236979SAndrew Lunn *str = "VCC"; 1151c1236979SAndrew Lunn return 0; 1152c1236979SAndrew Lunn default: 1153c1236979SAndrew Lunn return -EOPNOTSUPP; 1154c1236979SAndrew Lunn } 1155c1236979SAndrew Lunn break; 1156c1236979SAndrew Lunn case hwmon_power: 1157c1236979SAndrew Lunn switch (attr) { 1158c1236979SAndrew Lunn case hwmon_power_label: 1159c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1160c1236979SAndrew Lunn return 0; 1161c1236979SAndrew Lunn default: 1162c1236979SAndrew Lunn return -EOPNOTSUPP; 1163c1236979SAndrew Lunn } 1164c1236979SAndrew Lunn break; 1165c1236979SAndrew Lunn default: 1166c1236979SAndrew Lunn return -EOPNOTSUPP; 1167c1236979SAndrew Lunn } 1168c1236979SAndrew Lunn 1169c1236979SAndrew Lunn return -EOPNOTSUPP; 1170c1236979SAndrew Lunn } 1171c1236979SAndrew Lunn 11721323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11731323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11741323061aSAndrew Lunn .read = sfp_hwmon_read, 1175c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11761323061aSAndrew Lunn }; 11771323061aSAndrew Lunn 11781323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 11791323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 11801323061aSAndrew Lunn 0, 11811323061aSAndrew Lunn }; 11821323061aSAndrew Lunn 11831323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 11841323061aSAndrew Lunn .type = hwmon_chip, 11851323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 11861323061aSAndrew Lunn }; 11871323061aSAndrew Lunn 11881323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 11891323061aSAndrew Lunn HWMON_T_INPUT | 11901323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 11911323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 11921323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1193c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1194c1236979SAndrew Lunn HWMON_T_LABEL, 11951323061aSAndrew Lunn 0, 11961323061aSAndrew Lunn }; 11971323061aSAndrew Lunn 11981323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 11991323061aSAndrew Lunn .type = hwmon_temp, 12001323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 12011323061aSAndrew Lunn }; 12021323061aSAndrew Lunn 12031323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 12041323061aSAndrew Lunn HWMON_I_INPUT | 12051323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 12061323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 12071323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1208c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1209c1236979SAndrew Lunn HWMON_I_LABEL, 12101323061aSAndrew Lunn 0, 12111323061aSAndrew Lunn }; 12121323061aSAndrew Lunn 12131323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 12141323061aSAndrew Lunn .type = hwmon_in, 12151323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 12161323061aSAndrew Lunn }; 12171323061aSAndrew Lunn 12181323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 12191323061aSAndrew Lunn HWMON_C_INPUT | 12201323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 12211323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 12221323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1223c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1224c1236979SAndrew Lunn HWMON_C_LABEL, 12251323061aSAndrew Lunn 0, 12261323061aSAndrew Lunn }; 12271323061aSAndrew Lunn 12281323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 12291323061aSAndrew Lunn .type = hwmon_curr, 12301323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 12311323061aSAndrew Lunn }; 12321323061aSAndrew Lunn 12331323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 12341323061aSAndrew Lunn /* Transmit power */ 12351323061aSAndrew Lunn HWMON_P_INPUT | 12361323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12371323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12381323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1239c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1240c1236979SAndrew Lunn HWMON_P_LABEL, 12411323061aSAndrew Lunn /* Receive power */ 12421323061aSAndrew Lunn HWMON_P_INPUT | 12431323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12441323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12451323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1246c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1247c1236979SAndrew Lunn HWMON_P_LABEL, 12481323061aSAndrew Lunn 0, 12491323061aSAndrew Lunn }; 12501323061aSAndrew Lunn 12511323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 12521323061aSAndrew Lunn .type = hwmon_power, 12531323061aSAndrew Lunn .config = sfp_hwmon_power_config, 12541323061aSAndrew Lunn }; 12551323061aSAndrew Lunn 12561323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 12571323061aSAndrew Lunn &sfp_hwmon_chip, 12581323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 12591323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 12601323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 12611323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 12621323061aSAndrew Lunn NULL, 12631323061aSAndrew Lunn }; 12641323061aSAndrew Lunn 12651323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12661323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12671323061aSAndrew Lunn .info = sfp_hwmon_info, 12681323061aSAndrew Lunn }; 12691323061aSAndrew Lunn 1270139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12711323061aSAndrew Lunn { 1272139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12731323061aSAndrew Lunn int err, i; 12741323061aSAndrew Lunn 1275139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1276139d3a21SRussell King if (err < 0) { 1277139d3a21SRussell King if (sfp->hwmon_tries--) { 1278139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1279139d3a21SRussell King T_PROBE_RETRY_SLOW); 1280139d3a21SRussell King } else { 1281139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1282139d3a21SRussell King } 1283139d3a21SRussell King return; 1284139d3a21SRussell King } 1285139d3a21SRussell King 1286139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1287139d3a21SRussell King if (!sfp->hwmon_name) { 1288139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1289139d3a21SRussell King return; 1290139d3a21SRussell King } 1291139d3a21SRussell King 1292139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1293139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1294139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1295139d3a21SRussell King 1296139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1297139d3a21SRussell King sfp->hwmon_name, sfp, 1298139d3a21SRussell King &sfp_hwmon_chip_info, 1299139d3a21SRussell King NULL); 1300139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1301139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1302139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1303139d3a21SRussell King } 1304139d3a21SRussell King 1305139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1306139d3a21SRussell King { 13071323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 13081323061aSAndrew Lunn return 0; 13091323061aSAndrew Lunn 13101323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 13111323061aSAndrew Lunn return 0; 13121323061aSAndrew Lunn 13131323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 13141323061aSAndrew Lunn /* This driver in general does not support address 13151323061aSAndrew Lunn * change. 13161323061aSAndrew Lunn */ 13171323061aSAndrew Lunn return 0; 13181323061aSAndrew Lunn 1319139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1320139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 13211323061aSAndrew Lunn 1322139d3a21SRussell King return 0; 13231323061aSAndrew Lunn } 13241323061aSAndrew Lunn 13251323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13261323061aSAndrew Lunn { 1327139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13283e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13291323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13303e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13311323061aSAndrew Lunn kfree(sfp->hwmon_name); 13321323061aSAndrew Lunn } 13333e322474SAndrew Lunn } 1334139d3a21SRussell King 1335139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1336139d3a21SRussell King { 1337139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1338139d3a21SRussell King 1339139d3a21SRussell King return 0; 1340139d3a21SRussell King } 1341139d3a21SRussell King 1342139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1343139d3a21SRussell King { 1344139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1345139d3a21SRussell King } 13461323061aSAndrew Lunn #else 13471323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13481323061aSAndrew Lunn { 13491323061aSAndrew Lunn return 0; 13501323061aSAndrew Lunn } 13511323061aSAndrew Lunn 13521323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13531323061aSAndrew Lunn { 13541323061aSAndrew Lunn } 1355139d3a21SRussell King 1356139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1357139d3a21SRussell King { 1358139d3a21SRussell King return 0; 1359139d3a21SRussell King } 1360139d3a21SRussell King 1361139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1362139d3a21SRussell King { 1363139d3a21SRussell King } 13641323061aSAndrew Lunn #endif 13651323061aSAndrew Lunn 136673970055SRussell King /* Helpers */ 136773970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 136873970055SRussell King { 136973970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 137073970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 137173970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 137273970055SRussell King sfp_set_state(sfp, sfp->state); 137373970055SRussell King } 137473970055SRussell King 137573970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 137673970055SRussell King { 137773970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 137873970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 137973970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 138073970055SRussell King sfp_set_state(sfp, sfp->state); 138173970055SRussell King } 138273970055SRussell King 138373970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 138473970055SRussell King { 138573970055SRussell King unsigned int state = sfp->state; 138673970055SRussell King 138773970055SRussell King if (state & SFP_F_TX_DISABLE) 138873970055SRussell King return; 138973970055SRussell King 139073970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 139173970055SRussell King 139273970055SRussell King udelay(T_RESET_US); 139373970055SRussell King 139473970055SRussell King sfp_set_state(sfp, state); 139573970055SRussell King } 139673970055SRussell King 139773970055SRussell King /* SFP state machine */ 139873970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 139973970055SRussell King { 140073970055SRussell King if (timeout) 140173970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 140273970055SRussell King timeout); 140373970055SRussell King else 140473970055SRussell King cancel_delayed_work(&sfp->timeout); 140573970055SRussell King } 140673970055SRussell King 140773970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 140873970055SRussell King unsigned int timeout) 140973970055SRussell King { 141073970055SRussell King sfp->sm_state = state; 141173970055SRussell King sfp_sm_set_timer(sfp, timeout); 141273970055SRussell King } 141373970055SRussell King 14140936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1415516b29edSFlorian Fainelli unsigned int timeout) 141673970055SRussell King { 141773970055SRussell King sfp->sm_mod_state = state; 141873970055SRussell King sfp_sm_set_timer(sfp, timeout); 141973970055SRussell King } 142073970055SRussell King 142173970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 142273970055SRussell King { 142373970055SRussell King sfp_remove_phy(sfp->sfp_bus); 142473970055SRussell King phy_device_remove(sfp->mod_phy); 142573970055SRussell King phy_device_free(sfp->mod_phy); 142673970055SRussell King sfp->mod_phy = NULL; 142773970055SRussell King } 142873970055SRussell King 1429256e43cbSRussell King static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) 143073970055SRussell King { 143173970055SRussell King struct phy_device *phy; 143273970055SRussell King int err; 143373970055SRussell King 14349a484621SRussell King phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); 14351cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 14361cb89a14SRussell King return PTR_ERR(phy); 143720b56ed9SRussell King if (IS_ERR(phy)) { 143820b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 1439256e43cbSRussell King return PTR_ERR(phy); 144073970055SRussell King } 144173970055SRussell King 14429a484621SRussell King err = phy_device_register(phy); 14439a484621SRussell King if (err) { 14449a484621SRussell King phy_device_free(phy); 14459a484621SRussell King dev_err(sfp->dev, "phy_device_register failed: %d\n", err); 1446256e43cbSRussell King return err; 14479a484621SRussell King } 14489a484621SRussell King 144973970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 145073970055SRussell King if (err) { 145173970055SRussell King phy_device_remove(phy); 145273970055SRussell King phy_device_free(phy); 145373970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 1454256e43cbSRussell King return err; 145573970055SRussell King } 145673970055SRussell King 145773970055SRussell King sfp->mod_phy = phy; 1458256e43cbSRussell King 1459256e43cbSRussell King return 0; 146073970055SRussell King } 146173970055SRussell King 146273970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 146373970055SRussell King { 146473970055SRussell King sfp_link_up(sfp->sfp_bus); 146573970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 146673970055SRussell King } 146773970055SRussell King 146873970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 146973970055SRussell King { 147073970055SRussell King sfp_link_down(sfp->sfp_bus); 147173970055SRussell King } 147273970055SRussell King 147373970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 147473970055SRussell King { 147573970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 147673970055SRussell King 1477710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1478710dfbb0SRussell King * are set, we assume that no LOS signal is available. 147973970055SRussell King */ 1480acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 148173970055SRussell King los ^= SFP_F_LOS; 1482710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1483710dfbb0SRussell King los = 0; 148473970055SRussell King 148573970055SRussell King if (los) 148673970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 148773970055SRussell King else 148873970055SRussell King sfp_sm_link_up(sfp); 148973970055SRussell King } 149073970055SRussell King 1491710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1492710dfbb0SRussell King { 1493710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1494710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1495710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1496710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1497710dfbb0SRussell King } 1498710dfbb0SRussell King 1499710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1500710dfbb0SRussell King { 1501710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1502710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1503710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1504710dfbb0SRussell King event == SFP_E_LOS_LOW); 1505710dfbb0SRussell King } 1506710dfbb0SRussell King 150763ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 150873970055SRussell King { 1509281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1510516b29edSFlorian Fainelli dev_err(sfp->dev, 1511516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 151273970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 151373970055SRussell King } else { 151473970055SRussell King if (warn) 151573970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 151673970055SRussell King 151763ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 151873970055SRussell King } 151973970055SRussell King } 152073970055SRussell King 15219a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 15229a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 15239a484621SRussell King * or clause 45 PHY. 15249a484621SRussell King * 15259a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 15269a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 15279a484621SRussell King * PHY driver to determine. 15289a484621SRussell King * 15299a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 15309a484621SRussell King * mode according to the negotiated line speed. 15319a484621SRussell King */ 1532256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1533181f29daSRussell King { 1534256e43cbSRussell King int err = 0; 1535256e43cbSRussell King 15369a484621SRussell King switch (sfp->id.base.extended_cc) { 15379a484621SRussell King case SFF8024_ECC_10GBASE_T_SFI: 15389a484621SRussell King case SFF8024_ECC_10GBASE_T_SR: 15399a484621SRussell King case SFF8024_ECC_5GBASE_T: 15409a484621SRussell King case SFF8024_ECC_2_5GBASE_T: 1541256e43cbSRussell King err = sfp_sm_probe_phy(sfp, true); 15429a484621SRussell King break; 15439a484621SRussell King 15449a484621SRussell King default: 1545fa2de660SRussell King if (sfp->id.base.e1000_base_t) 1546256e43cbSRussell King err = sfp_sm_probe_phy(sfp, false); 15479a484621SRussell King break; 15489a484621SRussell King } 1549256e43cbSRussell King return err; 155073970055SRussell King } 155173970055SRussell King 1552ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 15533bb35261SJon Nettleton { 1554ed32abb1SRussell King u32 power_mW = 1000; 15553bb35261SJon Nettleton 15563bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1557ed32abb1SRussell King power_mW = 1500; 15583bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1559ed32abb1SRussell King power_mW = 2000; 15603bb35261SJon Nettleton 1561ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 15627cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 15637cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 15647cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 15657cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 15667cfa9c92SRussell King /* The module appears not to implement bus address 15677cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 15687cfa9c92SRussell King * indicated mode. 15697cfa9c92SRussell King */ 15703bb35261SJon Nettleton dev_err(sfp->dev, 15713bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1572ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15733bb35261SJon Nettleton return -EINVAL; 15747cfa9c92SRussell King } else { 15753bb35261SJon Nettleton dev_warn(sfp->dev, 15763bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1577ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15783bb35261SJon Nettleton return 0; 15793bb35261SJon Nettleton } 15807cfa9c92SRussell King } 15817cfa9c92SRussell King 15827cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 15837cfa9c92SRussell King * an address change sequence, warn the user that the module may 15847cfa9c92SRussell King * not be functional. 15857cfa9c92SRussell King */ 15867cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 15877cfa9c92SRussell King dev_warn(sfp->dev, 158807f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 15897cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 15907cfa9c92SRussell King return 0; 15917cfa9c92SRussell King } 15923bb35261SJon Nettleton 1593ed32abb1SRussell King sfp->module_power_mW = power_mW; 1594ed32abb1SRussell King 1595ed32abb1SRussell King return 0; 1596ed32abb1SRussell King } 1597ed32abb1SRussell King 1598b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1599ed32abb1SRussell King { 1600ed32abb1SRussell King u8 val; 1601ed32abb1SRussell King int err; 1602ed32abb1SRussell King 16033bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16043bb35261SJon Nettleton if (err != sizeof(val)) { 16053bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 1606b036a554SRussell King return -EAGAIN; 16073bb35261SJon Nettleton } 16083bb35261SJon Nettleton 16099a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 16109a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 16119a484621SRussell King * if the bit is already set, we're already in high power mode. 16129a484621SRussell King */ 16139a484621SRussell King if (!!(val & BIT(0)) == enable) 16149a484621SRussell King return 0; 16159a484621SRussell King 1616b036a554SRussell King if (enable) 16173bb35261SJon Nettleton val |= BIT(0); 1618b036a554SRussell King else 1619b036a554SRussell King val &= ~BIT(0); 16203bb35261SJon Nettleton 16213bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16223bb35261SJon Nettleton if (err != sizeof(val)) { 16233bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 1624b036a554SRussell King return -EAGAIN; 16253bb35261SJon Nettleton } 16263bb35261SJon Nettleton 1627b036a554SRussell King if (enable) 16283bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1629ed32abb1SRussell King sfp->module_power_mW / 1000, 1630ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 16313bb35261SJon Nettleton 1632b036a554SRussell King return 0; 16333bb35261SJon Nettleton } 16343bb35261SJon Nettleton 1635b18432c5SChris Healy static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) 1636b18432c5SChris Healy { 1637b18432c5SChris Healy u8 check; 1638b18432c5SChris Healy int err; 1639b18432c5SChris Healy 1640b18432c5SChris Healy if (id->base.phys_id != SFF8024_ID_SFF_8472 || 1641b18432c5SChris Healy id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || 1642b18432c5SChris Healy id->base.connector != SFF8024_CONNECTOR_LC) { 1643b18432c5SChris Healy dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); 1644b18432c5SChris Healy id->base.phys_id = SFF8024_ID_SFF_8472; 1645b18432c5SChris Healy id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; 1646b18432c5SChris Healy id->base.connector = SFF8024_CONNECTOR_LC; 1647b18432c5SChris Healy err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); 1648b18432c5SChris Healy if (err != 3) { 1649b18432c5SChris Healy dev_err(sfp->dev, "Failed to rewrite module EEPROM: %d\n", err); 1650b18432c5SChris Healy return err; 1651b18432c5SChris Healy } 1652b18432c5SChris Healy 1653b18432c5SChris Healy /* Cotsworks modules have been found to require a delay between write operations. */ 1654b18432c5SChris Healy mdelay(50); 1655b18432c5SChris Healy 1656b18432c5SChris Healy /* Update base structure checksum */ 1657b18432c5SChris Healy check = sfp_check(&id->base, sizeof(id->base) - 1); 1658b18432c5SChris Healy err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); 1659b18432c5SChris Healy if (err != 1) { 1660b18432c5SChris Healy dev_err(sfp->dev, "Failed to update base structure checksum in fiber module EEPROM: %d\n", err); 1661b18432c5SChris Healy return err; 1662b18432c5SChris Healy } 1663b18432c5SChris Healy } 1664b18432c5SChris Healy return 0; 1665b18432c5SChris Healy } 1666b18432c5SChris Healy 1667e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 166873970055SRussell King { 166973970055SRussell King /* SFP module inserted - read I2C data */ 167073970055SRussell King struct sfp_eeprom_id id; 1671b18432c5SChris Healy bool cotsworks_sfbg; 1672981f1f80SRussell King bool cotsworks; 167373970055SRussell King u8 check; 16743bb35261SJon Nettleton int ret; 167573970055SRussell King 16763bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 16773bb35261SJon Nettleton if (ret < 0) { 1678e117be74SRussell King if (report) 16793bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 168073970055SRussell King return -EAGAIN; 168173970055SRussell King } 168273970055SRussell King 16833bb35261SJon Nettleton if (ret != sizeof(id)) { 16843bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 168573970055SRussell King return -EAGAIN; 168673970055SRussell King } 168773970055SRussell King 1688981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1689981f1f80SRussell King * do the final programming with the final module part number, 1690981f1f80SRussell King * serial number and date code. 1691981f1f80SRussell King */ 1692981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1693b18432c5SChris Healy cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); 1694b18432c5SChris Healy 1695b18432c5SChris Healy /* Cotsworks SFF module EEPROM do not always have valid phys_id, 1696b18432c5SChris Healy * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if 1697b18432c5SChris Healy * Cotsworks PN matches and bytes are not correct. 1698b18432c5SChris Healy */ 1699b18432c5SChris Healy if (cotsworks && cotsworks_sfbg) { 1700b18432c5SChris Healy ret = sfp_cotsworks_fixup_check(sfp, &id); 1701b18432c5SChris Healy if (ret < 0) 1702b18432c5SChris Healy return ret; 1703b18432c5SChris Healy } 1704981f1f80SRussell King 170573970055SRussell King /* Validate the checksum over the base structure */ 170673970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 170773970055SRussell King if (check != id.base.cc_base) { 1708981f1f80SRussell King if (cotsworks) { 1709981f1f80SRussell King dev_warn(sfp->dev, 1710981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1711981f1f80SRussell King check, id.base.cc_base); 1712981f1f80SRussell King } else { 171373970055SRussell King dev_err(sfp->dev, 1714981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1715981f1f80SRussell King check, id.base.cc_base); 171673970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1717981f1f80SRussell King 16, 1, &id, sizeof(id), true); 171873970055SRussell King return -EINVAL; 171973970055SRussell King } 1720981f1f80SRussell King } 172173970055SRussell King 172273970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 172373970055SRussell King if (check != id.ext.cc_ext) { 1724981f1f80SRussell King if (cotsworks) { 1725981f1f80SRussell King dev_warn(sfp->dev, 1726981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1727981f1f80SRussell King check, id.ext.cc_ext); 1728981f1f80SRussell King } else { 172973970055SRussell King dev_err(sfp->dev, 1730981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1731981f1f80SRussell King check, id.ext.cc_ext); 1732981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1733981f1f80SRussell King 16, 1, &id, sizeof(id), true); 173473970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 173573970055SRussell King } 1736981f1f80SRussell King } 173773970055SRussell King 173873970055SRussell King sfp->id = id; 173973970055SRussell King 1740a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1741a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1742a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1743a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1744a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1745a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 174673970055SRussell King 1747259c8618SRussell King /* Check whether we support this module */ 1748f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1749259c8618SRussell King dev_err(sfp->dev, 1750259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 175173970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 175273970055SRussell King return -EINVAL; 175373970055SRussell King } 175473970055SRussell King 1755ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1756ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1757ec7681bdSRussell King dev_warn(sfp->dev, 1758ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1759ec7681bdSRussell King 1760ed32abb1SRussell King /* Parse the module power requirement */ 1761ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1762ed32abb1SRussell King if (ret < 0) 1763ed32abb1SRussell King return ret; 1764ed32abb1SRussell King 176526c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 176626c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 176726c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 176826c97a2dSRussell King else 176926c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 177026c97a2dSRussell King 1771b036a554SRussell King return 0; 177273970055SRussell King } 177373970055SRussell King 177473970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 177573970055SRussell King { 177673f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 177773970055SRussell King sfp_module_remove(sfp->sfp_bus); 177873970055SRussell King 17791323061aSAndrew Lunn sfp_hwmon_remove(sfp); 17801323061aSAndrew Lunn 178173970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1782ed32abb1SRussell King sfp->module_power_mW = 0; 178373970055SRussell King 178473970055SRussell King dev_info(sfp->dev, "module removed\n"); 178573970055SRussell King } 178673970055SRussell King 17876b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1788e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 178973970055SRussell King { 1790e85d81a1SRussell King switch (sfp->sm_dev_state) { 1791e85d81a1SRussell King default: 17926b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 17936b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 17946b0da5c9SRussell King break; 17956b0da5c9SRussell King 17966b0da5c9SRussell King case SFP_DEV_DOWN: 17976b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 17986b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 17996b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1800e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1801e85d81a1SRussell King break; 180273970055SRussell King 1803e85d81a1SRussell King case SFP_DEV_UP: 18046b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 18056b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 18066b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1807e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1808e85d81a1SRussell King break; 1809e85d81a1SRussell King } 1810e85d81a1SRussell King } 181173970055SRussell King 1812d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1813d900954fSRussell King * the on-board EEPROM, and sets up the power level. 181473970055SRussell King */ 1815e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1816e85d81a1SRussell King { 1817b036a554SRussell King int err; 1818b036a554SRussell King 1819b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1820b036a554SRussell King if (event == SFP_E_REMOVE) { 1821d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1822d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1823b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1824b036a554SRussell King return; 1825b036a554SRussell King } 1826b036a554SRussell King 1827b036a554SRussell King /* Handle device detach globally */ 182873f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 182973f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1830b036a554SRussell King if (sfp->module_power_mW > 1000 && 1831b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1832b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 183373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1834d2e816c0SRussell King return; 1835d2e816c0SRussell King } 1836d2e816c0SRussell King 183773970055SRussell King switch (sfp->sm_mod_state) { 183873970055SRussell King default: 1839e117be74SRussell King if (event == SFP_E_INSERT) { 1840d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 1841e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 1842e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 1843e117be74SRussell King } 184473970055SRussell King break; 184573970055SRussell King 184673970055SRussell King case SFP_MOD_PROBE: 184773f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 1848b036a554SRussell King if (event != SFP_E_TIMEOUT) 1849b036a554SRussell King break; 185073970055SRussell King 1851e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 1852b036a554SRussell King if (err == -EAGAIN) { 1853e117be74SRussell King if (sfp->sm_mod_tries_init && 1854e117be74SRussell King --sfp->sm_mod_tries_init) { 1855e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 1856b036a554SRussell King break; 1857e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 1858e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 1859e117be74SRussell King dev_warn(sfp->dev, 1860e117be74SRussell King "please wait, module slow to respond\n"); 1861e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 1862e117be74SRussell King break; 1863e117be74SRussell King } 1864b036a554SRussell King } 1865b036a554SRussell King if (err < 0) { 1866b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 1867b036a554SRussell King break; 1868b036a554SRussell King } 1869b036a554SRussell King 187038ecd706SRussell King err = sfp_hwmon_insert(sfp); 187138ecd706SRussell King if (err) 187238ecd706SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 187338ecd706SRussell King 187473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1875df561f66SGustavo A. R. Silva fallthrough; 187673f5e847SRussell King case SFP_MOD_WAITDEV: 187773f5e847SRussell King /* Ensure that the device is attached before proceeding */ 187873f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 187973f5e847SRussell King break; 188073f5e847SRussell King 188173f5e847SRussell King /* Report the module insertion to the upstream device */ 188273f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 188373f5e847SRussell King if (err < 0) { 188473f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 188573f5e847SRussell King break; 188673f5e847SRussell King } 188773f5e847SRussell King 1888b036a554SRussell King /* If this is a power level 1 module, we are done */ 1889b036a554SRussell King if (sfp->module_power_mW <= 1000) 1890b036a554SRussell King goto insert; 1891b036a554SRussell King 1892b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 1893df561f66SGustavo A. R. Silva fallthrough; 1894b036a554SRussell King case SFP_MOD_HPOWER: 1895b036a554SRussell King /* Enable high power mode */ 1896b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 189773f5e847SRussell King if (err < 0) { 189873f5e847SRussell King if (err != -EAGAIN) { 189973f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 19000936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 190173f5e847SRussell King } else { 1902e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 190373f5e847SRussell King } 190473f5e847SRussell King break; 190573f5e847SRussell King } 190673f5e847SRussell King 190773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 190873970055SRussell King break; 190973970055SRussell King 1910b036a554SRussell King case SFP_MOD_WAITPWR: 1911b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 1912b036a554SRussell King if (event != SFP_E_TIMEOUT) 1913b036a554SRussell King break; 1914b036a554SRussell King 1915b036a554SRussell King insert: 19160936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 19173bb35261SJon Nettleton break; 1918b036a554SRussell King 191973970055SRussell King case SFP_MOD_PRESENT: 192073970055SRussell King case SFP_MOD_ERROR: 192173970055SRussell King break; 192273970055SRussell King } 192373970055SRussell King } 192473970055SRussell King 1925e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 1926e85d81a1SRussell King { 1927eefa6f1fSRussell King unsigned long timeout; 19281cb89a14SRussell King int ret; 1929eefa6f1fSRussell King 193073970055SRussell King /* Some events are global */ 193173970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 193273970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 193373970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 193473970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 193573970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 193673970055SRussell King sfp_sm_link_down(sfp); 193774c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 193874c551caSRussell King sfp_module_stop(sfp->sfp_bus); 193973970055SRussell King if (sfp->mod_phy) 194073970055SRussell King sfp_sm_phy_detach(sfp); 19411539e0d3SRussell King sfp_module_tx_disable(sfp); 1942f3c9a666SRussell King sfp_soft_stop_poll(sfp); 194373970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 194473970055SRussell King return; 194573970055SRussell King } 194673970055SRussell King 194773970055SRussell King /* The main state machine */ 194873970055SRussell King switch (sfp->sm_state) { 194973970055SRussell King case SFP_S_DOWN: 1950eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 1951eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 1952eefa6f1fSRussell King break; 1953eefa6f1fSRussell King 1954f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 1955f3c9a666SRussell King sfp_soft_start_poll(sfp); 1956f3c9a666SRussell King 1957f3c9a666SRussell King sfp_module_tx_enable(sfp); 1958eefa6f1fSRussell King 1959eefa6f1fSRussell King /* Initialise the fault clearance retries */ 1960281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 1961eefa6f1fSRussell King 1962eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 1963eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 1964eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 1965eefa6f1fSRussell King */ 1966eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 1967eefa6f1fSRussell King break; 1968eefa6f1fSRussell King 1969eefa6f1fSRussell King case SFP_S_WAIT: 1970eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 1971eefa6f1fSRussell King break; 1972eefa6f1fSRussell King 1973eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 197426c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 197526c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 197626c97a2dSRussell King * initialise, which is indicated by TX_FAULT 197726c97a2dSRussell King * deasserting. 1978181f29daSRussell King */ 197926c97a2dSRussell King timeout = sfp->module_t_start_up; 1980eefa6f1fSRussell King if (timeout > T_WAIT) 1981eefa6f1fSRussell King timeout -= T_WAIT; 1982eefa6f1fSRussell King else 1983eefa6f1fSRussell King timeout = 1; 1984eefa6f1fSRussell King 1985eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 1986eefa6f1fSRussell King } else { 1987eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 1988eefa6f1fSRussell King * finished initialising. 1989eefa6f1fSRussell King */ 1990eefa6f1fSRussell King goto init_done; 1991181f29daSRussell King } 199273970055SRussell King break; 199373970055SRussell King 199473970055SRussell King case SFP_S_INIT: 1995d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 199626c97a2dSRussell King /* TX_FAULT is still asserted after t_init or 199726c97a2dSRussell King * or t_start_up, so assume there is a fault. 1998d23751a0SRussell King */ 1999d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 2000281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 2001d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 20021cb89a14SRussell King init_done: 20031cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 20041cb89a14SRussell King goto phy_probe; 20051cb89a14SRussell King } 20061cb89a14SRussell King break; 20071cb89a14SRussell King 20081cb89a14SRussell King case SFP_S_INIT_PHY: 20091cb89a14SRussell King if (event != SFP_E_TIMEOUT) 20101cb89a14SRussell King break; 20111cb89a14SRussell King phy_probe: 20121cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 2013d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 2014d23751a0SRussell King */ 20151cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 20161cb89a14SRussell King if (ret == -ENODEV) { 20171cb89a14SRussell King if (--sfp->sm_phy_retries) { 20181cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 20191cb89a14SRussell King break; 20201cb89a14SRussell King } else { 20211cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 20221cb89a14SRussell King } 20231cb89a14SRussell King } else if (ret) { 2024256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 2025256e43cbSRussell King break; 2026256e43cbSRussell King } 202774c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 202874c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 202974c551caSRussell King break; 203074c551caSRussell King } 2031d23751a0SRussell King sfp_sm_link_check_los(sfp); 2032d23751a0SRussell King 2033d23751a0SRussell King /* Reset the fault retry count */ 2034281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 2035d23751a0SRussell King break; 2036d23751a0SRussell King 2037d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 2038d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 2039d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 204026c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 2041d23751a0SRussell King } 204273970055SRussell King break; 204373970055SRussell King 204473970055SRussell King case SFP_S_WAIT_LOS: 204573970055SRussell King if (event == SFP_E_TX_FAULT) 204663ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2047710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 204873970055SRussell King sfp_sm_link_up(sfp); 204973970055SRussell King break; 205073970055SRussell King 205173970055SRussell King case SFP_S_LINK_UP: 205273970055SRussell King if (event == SFP_E_TX_FAULT) { 205373970055SRussell King sfp_sm_link_down(sfp); 205463ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2055710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 205673970055SRussell King sfp_sm_link_down(sfp); 205773970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 205873970055SRussell King } 205973970055SRussell King break; 206073970055SRussell King 206173970055SRussell King case SFP_S_TX_FAULT: 206273970055SRussell King if (event == SFP_E_TIMEOUT) { 206373970055SRussell King sfp_module_tx_fault_reset(sfp); 206426c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 206573970055SRussell King } 206673970055SRussell King break; 206773970055SRussell King 206873970055SRussell King case SFP_S_REINIT: 206973970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 207063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 207173970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 207273970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 207373970055SRussell King sfp_sm_link_check_los(sfp); 207473970055SRussell King } 207573970055SRussell King break; 207673970055SRussell King 207773970055SRussell King case SFP_S_TX_DISABLE: 207873970055SRussell King break; 207973970055SRussell King } 2080e85d81a1SRussell King } 2081e85d81a1SRussell King 2082e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2083e85d81a1SRussell King { 2084e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2085e85d81a1SRussell King 2086e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2087e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2088e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2089e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2090e85d81a1SRussell King event_to_str(event)); 2091e85d81a1SRussell King 2092e85d81a1SRussell King sfp_sm_device(sfp, event); 20936b0da5c9SRussell King sfp_sm_module(sfp, event); 2094e85d81a1SRussell King sfp_sm_main(sfp, event); 209573970055SRussell King 20964005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 20974005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 20984005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 20994005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 210073970055SRussell King 210173970055SRussell King mutex_unlock(&sfp->sm_mutex); 210273970055SRussell King } 210373970055SRussell King 2104b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2105b5bfc21aSRussell King { 21066b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2107b5bfc21aSRussell King } 2108b5bfc21aSRussell King 2109b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2110b5bfc21aSRussell King { 21116b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2112b5bfc21aSRussell King } 2113b5bfc21aSRussell King 211473970055SRussell King static void sfp_start(struct sfp *sfp) 211573970055SRussell King { 211673970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 211773970055SRussell King } 211873970055SRussell King 211973970055SRussell King static void sfp_stop(struct sfp *sfp) 212073970055SRussell King { 212173970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 212273970055SRussell King } 212373970055SRussell King 212473970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 212573970055SRussell King { 212673970055SRussell King /* locking... and check module is present */ 212773970055SRussell King 2128ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2129ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 213073970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 213173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 213273970055SRussell King } else { 213373970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 213473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 213573970055SRussell King } 213673970055SRussell King return 0; 213773970055SRussell King } 213873970055SRussell King 213973970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 214073970055SRussell King u8 *data) 214173970055SRussell King { 214273970055SRussell King unsigned int first, last, len; 214373970055SRussell King int ret; 214473970055SRussell King 214573970055SRussell King if (ee->len == 0) 214673970055SRussell King return -EINVAL; 214773970055SRussell King 214873970055SRussell King first = ee->offset; 214973970055SRussell King last = ee->offset + ee->len; 215073970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 215173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 215273970055SRussell King len -= first; 215373970055SRussell King 21542794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 215573970055SRussell King if (ret < 0) 215673970055SRussell King return ret; 215773970055SRussell King 215873970055SRussell King first += len; 215973970055SRussell King data += len; 216073970055SRussell King } 21612794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 216273970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 216373970055SRussell King len -= first; 216473970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 216573970055SRussell King 21662794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 216773970055SRussell King if (ret < 0) 216873970055SRussell King return ret; 216973970055SRussell King } 217073970055SRussell King return 0; 217173970055SRussell King } 217273970055SRussell King 217373970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2174b5bfc21aSRussell King .attach = sfp_attach, 2175b5bfc21aSRussell King .detach = sfp_detach, 217673970055SRussell King .start = sfp_start, 217773970055SRussell King .stop = sfp_stop, 217873970055SRussell King .module_info = sfp_module_info, 217973970055SRussell King .module_eeprom = sfp_module_eeprom, 218073970055SRussell King }; 218173970055SRussell King 218273970055SRussell King static void sfp_timeout(struct work_struct *work) 218373970055SRussell King { 218473970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 218573970055SRussell King 218673970055SRussell King rtnl_lock(); 218773970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 218873970055SRussell King rtnl_unlock(); 218973970055SRussell King } 219073970055SRussell King 219173970055SRussell King static void sfp_check_state(struct sfp *sfp) 219273970055SRussell King { 219373970055SRussell King unsigned int state, i, changed; 219473970055SRussell King 21952158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 219673970055SRussell King state = sfp_get_state(sfp); 219773970055SRussell King changed = state ^ sfp->state; 219873970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 219973970055SRussell King 220073970055SRussell King for (i = 0; i < GPIO_MAX; i++) 220173970055SRussell King if (changed & BIT(i)) 220273970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 220373970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 220473970055SRussell King 220573970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 220673970055SRussell King sfp->state = state; 220773970055SRussell King 220873970055SRussell King rtnl_lock(); 220973970055SRussell King if (changed & SFP_F_PRESENT) 221073970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 221173970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 221273970055SRussell King 221373970055SRussell King if (changed & SFP_F_TX_FAULT) 221473970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 221573970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 221673970055SRussell King 221773970055SRussell King if (changed & SFP_F_LOS) 221873970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 221973970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 222073970055SRussell King rtnl_unlock(); 22212158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 222273970055SRussell King } 222373970055SRussell King 222473970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 222573970055SRussell King { 222673970055SRussell King struct sfp *sfp = data; 222773970055SRussell King 222873970055SRussell King sfp_check_state(sfp); 222973970055SRussell King 223073970055SRussell King return IRQ_HANDLED; 223173970055SRussell King } 223273970055SRussell King 223373970055SRussell King static void sfp_poll(struct work_struct *work) 223473970055SRussell King { 223573970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 223673970055SRussell King 223773970055SRussell King sfp_check_state(sfp); 2238f3c9a666SRussell King 2239f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2240f3c9a666SRussell King sfp->need_poll) 224173970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 224273970055SRussell King } 224373970055SRussell King 224473970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 224573970055SRussell King { 224673970055SRussell King struct sfp *sfp; 224773970055SRussell King 224873970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 224973970055SRussell King if (!sfp) 225073970055SRussell King return ERR_PTR(-ENOMEM); 225173970055SRussell King 225273970055SRussell King sfp->dev = dev; 225373970055SRussell King 225473970055SRussell King mutex_init(&sfp->sm_mutex); 22552158e856SRobert Hancock mutex_init(&sfp->st_mutex); 225673970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 225773970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 225873970055SRussell King 2259139d3a21SRussell King sfp_hwmon_init(sfp); 2260139d3a21SRussell King 226173970055SRussell King return sfp; 226273970055SRussell King } 226373970055SRussell King 226473970055SRussell King static void sfp_cleanup(void *data) 226573970055SRussell King { 226673970055SRussell King struct sfp *sfp = data; 226773970055SRussell King 2268139d3a21SRussell King sfp_hwmon_exit(sfp); 2269139d3a21SRussell King 227073970055SRussell King cancel_delayed_work_sync(&sfp->poll); 227173970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 227273970055SRussell King if (sfp->i2c_mii) { 227373970055SRussell King mdiobus_unregister(sfp->i2c_mii); 227473970055SRussell King mdiobus_free(sfp->i2c_mii); 227573970055SRussell King } 227673970055SRussell King if (sfp->i2c) 227773970055SRussell King i2c_put_adapter(sfp->i2c); 227873970055SRussell King kfree(sfp); 227973970055SRussell King } 228073970055SRussell King 228173970055SRussell King static int sfp_probe(struct platform_device *pdev) 228273970055SRussell King { 2283259c8618SRussell King const struct sff_data *sff; 22847ce236faSRuslan Babayev struct i2c_adapter *i2c; 22855411ca71SChris Healy char *sfp_irq_name; 228673970055SRussell King struct sfp *sfp; 2287257c2559SRobert Hancock int err, i; 228873970055SRussell King 228973970055SRussell King sfp = sfp_alloc(&pdev->dev); 229073970055SRussell King if (IS_ERR(sfp)) 229173970055SRussell King return PTR_ERR(sfp); 229273970055SRussell King 229373970055SRussell King platform_set_drvdata(pdev, sfp); 229473970055SRussell King 229573970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 229673970055SRussell King if (err < 0) 229773970055SRussell King return err; 229873970055SRussell King 2299259c8618SRussell King sff = sfp->type = &sfp_data; 2300259c8618SRussell King 230173970055SRussell King if (pdev->dev.of_node) { 230273970055SRussell King struct device_node *node = pdev->dev.of_node; 2303259c8618SRussell King const struct of_device_id *id; 230473970055SRussell King struct device_node *np; 230573970055SRussell King 2306259c8618SRussell King id = of_match_node(sfp_of_match, node); 2307259c8618SRussell King if (WARN_ON(!id)) 2308259c8618SRussell King return -EINVAL; 2309259c8618SRussell King 2310259c8618SRussell King sff = sfp->type = id->data; 2311259c8618SRussell King 231273970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 231366ede1f9SAntoine Tenart if (!np) { 231466ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 231566ede1f9SAntoine Tenart return -ENODEV; 231666ede1f9SAntoine Tenart } 231773970055SRussell King 231873970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 231973970055SRussell King of_node_put(np); 23207ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 23217ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 23227ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 23237ce236faSRuslan Babayev struct fwnode_reference_args args; 23247ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 23257ce236faSRuslan Babayev int ret; 23267ce236faSRuslan Babayev 23277ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 23281086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 23297ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 23307ce236faSRuslan Babayev return -ENODEV; 23317ce236faSRuslan Babayev } 23327ce236faSRuslan Babayev 23337ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 23347ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 23357ce236faSRuslan Babayev } else { 23367ce236faSRuslan Babayev return -EINVAL; 23377ce236faSRuslan Babayev } 23387ce236faSRuslan Babayev 233973970055SRussell King if (!i2c) 234073970055SRussell King return -EPROBE_DEFER; 234173970055SRussell King 234273970055SRussell King err = sfp_i2c_configure(sfp, i2c); 234373970055SRussell King if (err < 0) { 234473970055SRussell King i2c_put_adapter(i2c); 234573970055SRussell King return err; 234673970055SRussell King } 234773970055SRussell King 2348259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2349259c8618SRussell King if (sff->gpios & BIT(i)) { 235073970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 235173970055SRussell King gpio_of_names[i], gpio_flags[i]); 235273970055SRussell King if (IS_ERR(sfp->gpio[i])) 235373970055SRussell King return PTR_ERR(sfp->gpio[i]); 235473970055SRussell King } 235573970055SRussell King 235673970055SRussell King sfp->get_state = sfp_gpio_get_state; 235773970055SRussell King sfp->set_state = sfp_gpio_set_state; 2358259c8618SRussell King 2359259c8618SRussell King /* Modules that have no detect signal are always present */ 2360259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2361259c8618SRussell King sfp->get_state = sff_gpio_get_state; 236273970055SRussell King 23633bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 23643bb35261SJon Nettleton &sfp->max_power_mW); 23653bb35261SJon Nettleton if (!sfp->max_power_mW) 23663bb35261SJon Nettleton sfp->max_power_mW = 1000; 23673bb35261SJon Nettleton 23683bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 23693bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 23703bb35261SJon Nettleton 237173970055SRussell King /* Get the initial state, and always signal TX disable, 237273970055SRussell King * since the network interface will not be up. 237373970055SRussell King */ 237473970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 237573970055SRussell King 237673970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 237773970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 237873970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 237973970055SRussell King sfp_set_state(sfp, sfp->state); 238073970055SRussell King sfp_module_tx_disable(sfp); 238173f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 238273f5e847SRussell King rtnl_lock(); 238373f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 238473f5e847SRussell King rtnl_unlock(); 238573f5e847SRussell King } 238673970055SRussell King 238773970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 238873970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 238973970055SRussell King continue; 239073970055SRussell King 2391257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 239296216181SYueHaibing if (sfp->gpio_irq[i] < 0) { 239396216181SYueHaibing sfp->gpio_irq[i] = 0; 2394f3c9a666SRussell King sfp->need_poll = true; 239573970055SRussell King continue; 239673970055SRussell King } 239773970055SRussell King 23985411ca71SChris Healy sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, 23995411ca71SChris Healy "%s-%s", dev_name(sfp->dev), 24005411ca71SChris Healy gpio_of_names[i]); 24015411ca71SChris Healy 24028cb601f1SChris Healy if (!sfp_irq_name) 24038cb601f1SChris Healy return -ENOMEM; 24048cb601f1SChris Healy 2405257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2406257c2559SRobert Hancock NULL, sfp_irq, 240773970055SRussell King IRQF_ONESHOT | 240873970055SRussell King IRQF_TRIGGER_RISING | 240973970055SRussell King IRQF_TRIGGER_FALLING, 24105411ca71SChris Healy sfp_irq_name, sfp); 2411257c2559SRobert Hancock if (err) { 2412257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2413f3c9a666SRussell King sfp->need_poll = true; 241473970055SRussell King } 2415257c2559SRobert Hancock } 241673970055SRussell King 2417f3c9a666SRussell King if (sfp->need_poll) 241873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 241973970055SRussell King 2420a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2421a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2422a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2423a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2424a1f5d1f0SAntoine Tenart */ 2425a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2426a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2427a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2428a1f5d1f0SAntoine Tenart 2429b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2430b5bfc21aSRussell King if (!sfp->sfp_bus) 2431b5bfc21aSRussell King return -ENOMEM; 2432b5bfc21aSRussell King 243373970055SRussell King return 0; 243473970055SRussell King } 243573970055SRussell King 243673970055SRussell King static int sfp_remove(struct platform_device *pdev) 243773970055SRussell King { 243873970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 243973970055SRussell King 244073970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 244173970055SRussell King 24420cb96b57SRussell King rtnl_lock(); 24430cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 24440cb96b57SRussell King rtnl_unlock(); 24450cb96b57SRussell King 244673970055SRussell King return 0; 244773970055SRussell King } 244873970055SRussell King 2449257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2450257c2559SRobert Hancock { 2451257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2452257c2559SRobert Hancock int i; 2453257c2559SRobert Hancock 2454257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2455257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2456257c2559SRobert Hancock continue; 2457257c2559SRobert Hancock 2458257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2459257c2559SRobert Hancock } 2460257c2559SRobert Hancock 2461257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2462257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2463257c2559SRobert Hancock } 2464257c2559SRobert Hancock 246573970055SRussell King static struct platform_driver sfp_driver = { 246673970055SRussell King .probe = sfp_probe, 246773970055SRussell King .remove = sfp_remove, 2468257c2559SRobert Hancock .shutdown = sfp_shutdown, 246973970055SRussell King .driver = { 247073970055SRussell King .name = "sfp", 247173970055SRussell King .of_match_table = sfp_of_match, 247273970055SRussell King }, 247373970055SRussell King }; 247473970055SRussell King 247573970055SRussell King static int sfp_init(void) 247673970055SRussell King { 247773970055SRussell King poll_jiffies = msecs_to_jiffies(100); 247873970055SRussell King 247973970055SRussell King return platform_driver_register(&sfp_driver); 248073970055SRussell King } 248173970055SRussell King module_init(sfp_init); 248273970055SRussell King 248373970055SRussell King static void sfp_exit(void) 248473970055SRussell King { 248573970055SRussell King platform_driver_unregister(&sfp_driver); 248673970055SRussell King } 248773970055SRussell King module_exit(sfp_exit); 248873970055SRussell King 248973970055SRussell King MODULE_ALIAS("platform:sfp"); 249073970055SRussell King MODULE_AUTHOR("Russell King"); 249173970055SRussell King MODULE_LICENSE("GPL v2"); 2492