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> 1073970055SRussell King #include <linux/module.h> 1173970055SRussell King #include <linux/mutex.h> 1273970055SRussell King #include <linux/of.h> 1373970055SRussell King #include <linux/phy.h> 1473970055SRussell King #include <linux/platform_device.h> 1573970055SRussell King #include <linux/rtnetlink.h> 1673970055SRussell King #include <linux/slab.h> 1773970055SRussell King #include <linux/workqueue.h> 1873970055SRussell King 1973970055SRussell King #include "mdio-i2c.h" 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; 445f3c9a666SRussell King 446f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 447f3c9a666SRussell King sizeof(status)) { 448f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 449f3c9a666SRussell King state |= SFP_F_LOS; 450f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 451f3c9a666SRussell King state |= SFP_F_TX_FAULT; 452f3c9a666SRussell King } 453f3c9a666SRussell King 454f3c9a666SRussell King return state & sfp->state_soft_mask; 455f3c9a666SRussell King } 456f3c9a666SRussell King 457f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 458f3c9a666SRussell King { 459f3c9a666SRussell King u8 status; 460f3c9a666SRussell King 461f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 462f3c9a666SRussell King sizeof(status)) { 463f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 464f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 465f3c9a666SRussell King else 466f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 467f3c9a666SRussell King 468f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 469f3c9a666SRussell King } 470f3c9a666SRussell King } 471f3c9a666SRussell King 472f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 473f3c9a666SRussell King { 474f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 475f3c9a666SRussell King 476f3c9a666SRussell King sfp->state_soft_mask = 0; 477f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && 478f3c9a666SRussell King !sfp->gpio[GPIO_TX_DISABLE]) 479f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_DISABLE; 480f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && 481f3c9a666SRussell King !sfp->gpio[GPIO_TX_FAULT]) 482f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_FAULT; 483f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && 484f3c9a666SRussell King !sfp->gpio[GPIO_LOS]) 485f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_LOS; 486f3c9a666SRussell King 487f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 488f3c9a666SRussell King !sfp->need_poll) 489f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 490f3c9a666SRussell King } 491f3c9a666SRussell King 492f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 493f3c9a666SRussell King { 494f3c9a666SRussell King sfp->state_soft_mask = 0; 495f3c9a666SRussell King } 496f3c9a666SRussell King 497f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 498f3c9a666SRussell King { 499f3c9a666SRussell King unsigned int state = sfp->get_state(sfp); 500f3c9a666SRussell King 501f3c9a666SRussell King if (state & SFP_F_PRESENT && 502f3c9a666SRussell King sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) 503f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 504f3c9a666SRussell King 505f3c9a666SRussell King return state; 506f3c9a666SRussell King } 507f3c9a666SRussell King 508f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 509f3c9a666SRussell King { 510f3c9a666SRussell King sfp->set_state(sfp, state); 511f3c9a666SRussell King 512f3c9a666SRussell King if (state & SFP_F_PRESENT && 513f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 514f3c9a666SRussell King sfp_soft_set_state(sfp, state); 515f3c9a666SRussell King } 516f3c9a666SRussell King 51773970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 51873970055SRussell King { 51973970055SRussell King u8 *p, check; 52073970055SRussell King 52173970055SRussell King for (p = buf, check = 0; len; p++, len--) 52273970055SRussell King check += *p; 52373970055SRussell King 52473970055SRussell King return check; 52573970055SRussell King } 52673970055SRussell King 5271323061aSAndrew Lunn /* hwmon */ 5281323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 5291323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5301323061aSAndrew Lunn enum hwmon_sensor_types type, 5311323061aSAndrew Lunn u32 attr, int channel) 5321323061aSAndrew Lunn { 5331323061aSAndrew Lunn const struct sfp *sfp = data; 5341323061aSAndrew Lunn 5351323061aSAndrew Lunn switch (type) { 5361323061aSAndrew Lunn case hwmon_temp: 5371323061aSAndrew Lunn switch (attr) { 5381323061aSAndrew Lunn case hwmon_temp_min_alarm: 5391323061aSAndrew Lunn case hwmon_temp_max_alarm: 5401323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5411323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5421323061aSAndrew Lunn case hwmon_temp_min: 5431323061aSAndrew Lunn case hwmon_temp_max: 5441323061aSAndrew Lunn case hwmon_temp_lcrit: 5451323061aSAndrew Lunn case hwmon_temp_crit: 546a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 547a33710bdSAndrew Lunn return 0; 548a33710bdSAndrew Lunn /* fall through */ 549a33710bdSAndrew Lunn case hwmon_temp_input: 550c1236979SAndrew Lunn case hwmon_temp_label: 5511323061aSAndrew Lunn return 0444; 5521323061aSAndrew Lunn default: 5531323061aSAndrew Lunn return 0; 5541323061aSAndrew Lunn } 5551323061aSAndrew Lunn case hwmon_in: 5561323061aSAndrew Lunn switch (attr) { 5571323061aSAndrew Lunn case hwmon_in_min_alarm: 5581323061aSAndrew Lunn case hwmon_in_max_alarm: 5591323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5601323061aSAndrew Lunn case hwmon_in_crit_alarm: 5611323061aSAndrew Lunn case hwmon_in_min: 5621323061aSAndrew Lunn case hwmon_in_max: 5631323061aSAndrew Lunn case hwmon_in_lcrit: 5641323061aSAndrew Lunn case hwmon_in_crit: 565a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 566a33710bdSAndrew Lunn return 0; 567a33710bdSAndrew Lunn /* fall through */ 568a33710bdSAndrew Lunn case hwmon_in_input: 569c1236979SAndrew Lunn case hwmon_in_label: 5701323061aSAndrew Lunn return 0444; 5711323061aSAndrew Lunn default: 5721323061aSAndrew Lunn return 0; 5731323061aSAndrew Lunn } 5741323061aSAndrew Lunn case hwmon_curr: 5751323061aSAndrew Lunn switch (attr) { 5761323061aSAndrew Lunn case hwmon_curr_min_alarm: 5771323061aSAndrew Lunn case hwmon_curr_max_alarm: 5781323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 5791323061aSAndrew Lunn case hwmon_curr_crit_alarm: 5801323061aSAndrew Lunn case hwmon_curr_min: 5811323061aSAndrew Lunn case hwmon_curr_max: 5821323061aSAndrew Lunn case hwmon_curr_lcrit: 5831323061aSAndrew Lunn case hwmon_curr_crit: 584a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 585a33710bdSAndrew Lunn return 0; 586a33710bdSAndrew Lunn /* fall through */ 587a33710bdSAndrew Lunn case hwmon_curr_input: 588c1236979SAndrew Lunn case hwmon_curr_label: 5891323061aSAndrew Lunn return 0444; 5901323061aSAndrew Lunn default: 5911323061aSAndrew Lunn return 0; 5921323061aSAndrew Lunn } 5931323061aSAndrew Lunn case hwmon_power: 5941323061aSAndrew Lunn /* External calibration of receive power requires 5951323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 5961323061aSAndrew Lunn * is not easy, so just skip it. If the module does 5971323061aSAndrew Lunn * not require external calibration, we can however 5981323061aSAndrew Lunn * show receiver power, since FP is then not needed. 5991323061aSAndrew Lunn */ 6001323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 6011323061aSAndrew Lunn channel == 1) 6021323061aSAndrew Lunn return 0; 6031323061aSAndrew Lunn switch (attr) { 6041323061aSAndrew Lunn case hwmon_power_min_alarm: 6051323061aSAndrew Lunn case hwmon_power_max_alarm: 6061323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 6071323061aSAndrew Lunn case hwmon_power_crit_alarm: 6081323061aSAndrew Lunn case hwmon_power_min: 6091323061aSAndrew Lunn case hwmon_power_max: 6101323061aSAndrew Lunn case hwmon_power_lcrit: 6111323061aSAndrew Lunn case hwmon_power_crit: 612a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 613a33710bdSAndrew Lunn return 0; 614a33710bdSAndrew Lunn /* fall through */ 615a33710bdSAndrew Lunn case hwmon_power_input: 616c1236979SAndrew Lunn case hwmon_power_label: 6171323061aSAndrew Lunn return 0444; 6181323061aSAndrew Lunn default: 6191323061aSAndrew Lunn return 0; 6201323061aSAndrew Lunn } 6211323061aSAndrew Lunn default: 6221323061aSAndrew Lunn return 0; 6231323061aSAndrew Lunn } 6241323061aSAndrew Lunn } 6251323061aSAndrew Lunn 6261323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 6271323061aSAndrew Lunn { 6281323061aSAndrew Lunn __be16 val; 6291323061aSAndrew Lunn int err; 6301323061aSAndrew Lunn 6311323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6321323061aSAndrew Lunn if (err < 0) 6331323061aSAndrew Lunn return err; 6341323061aSAndrew Lunn 6351323061aSAndrew Lunn *value = be16_to_cpu(val); 6361323061aSAndrew Lunn 6371323061aSAndrew Lunn return 0; 6381323061aSAndrew Lunn } 6391323061aSAndrew Lunn 6401323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6411323061aSAndrew Lunn { 6420cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6431323061aSAndrew Lunn } 6441323061aSAndrew Lunn 6451323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6461323061aSAndrew Lunn long *value) 6471323061aSAndrew Lunn { 6481323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6491323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6501323061aSAndrew Lunn } 6511323061aSAndrew Lunn 6521323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6531323061aSAndrew Lunn { 6541323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6551323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6561323061aSAndrew Lunn 6571323061aSAndrew Lunn if (*value >= 0x8000) 6581323061aSAndrew Lunn *value -= 0x10000; 6591323061aSAndrew Lunn 6601323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6611323061aSAndrew Lunn } 6621323061aSAndrew Lunn 6631323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6641323061aSAndrew Lunn { 6651323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6661323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6671323061aSAndrew Lunn 6681323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6691323061aSAndrew Lunn } 6701323061aSAndrew Lunn 6711323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 6721323061aSAndrew Lunn { 6731323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 6741323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 6751323061aSAndrew Lunn 6761323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 6771323061aSAndrew Lunn } 6781323061aSAndrew Lunn 6791323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 6801323061aSAndrew Lunn { 6811323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 6821323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 6831323061aSAndrew Lunn 6841323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6851323061aSAndrew Lunn } 6861323061aSAndrew Lunn 6871323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 6881323061aSAndrew Lunn { 6891323061aSAndrew Lunn int err; 6901323061aSAndrew Lunn 6911323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6921323061aSAndrew Lunn if (err < 0) 6931323061aSAndrew Lunn return err; 6941323061aSAndrew Lunn 6951323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6961323061aSAndrew Lunn 6971323061aSAndrew Lunn return 0; 6981323061aSAndrew Lunn } 6991323061aSAndrew Lunn 7001323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 7011323061aSAndrew Lunn { 7021323061aSAndrew Lunn int err; 7031323061aSAndrew Lunn 7041323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7051323061aSAndrew Lunn if (err < 0) 7061323061aSAndrew Lunn return err; 7071323061aSAndrew Lunn 7081323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7091323061aSAndrew Lunn 7101323061aSAndrew Lunn return 0; 7111323061aSAndrew Lunn } 7121323061aSAndrew Lunn 7131323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 7141323061aSAndrew Lunn { 7151323061aSAndrew Lunn int err; 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7181323061aSAndrew Lunn if (err < 0) 7191323061aSAndrew Lunn return err; 7201323061aSAndrew Lunn 7211323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7221323061aSAndrew Lunn 7231323061aSAndrew Lunn return 0; 7241323061aSAndrew Lunn } 7251323061aSAndrew Lunn 7261323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 7271323061aSAndrew Lunn { 7281323061aSAndrew Lunn int err; 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7311323061aSAndrew Lunn if (err < 0) 7321323061aSAndrew Lunn return err; 7331323061aSAndrew Lunn 7341323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7351323061aSAndrew Lunn 7361323061aSAndrew Lunn return 0; 7371323061aSAndrew Lunn } 7381323061aSAndrew Lunn 7391323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7401323061aSAndrew Lunn { 7411323061aSAndrew Lunn int err; 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7441323061aSAndrew Lunn if (err < 0) 7451323061aSAndrew Lunn return err; 7461323061aSAndrew Lunn 7471323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7481323061aSAndrew Lunn 7491323061aSAndrew Lunn return 0; 7501323061aSAndrew Lunn } 7511323061aSAndrew Lunn 7521323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7531323061aSAndrew Lunn { 7541323061aSAndrew Lunn u8 status; 7551323061aSAndrew Lunn int err; 7561323061aSAndrew Lunn 7571323061aSAndrew Lunn switch (attr) { 7581323061aSAndrew Lunn case hwmon_temp_input: 7591323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7601323061aSAndrew Lunn 7611323061aSAndrew Lunn case hwmon_temp_lcrit: 7621323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7631323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7641323061aSAndrew Lunn return 0; 7651323061aSAndrew Lunn 7661323061aSAndrew Lunn case hwmon_temp_min: 7671323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7681323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7691323061aSAndrew Lunn return 0; 7701323061aSAndrew Lunn case hwmon_temp_max: 7711323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 7721323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7731323061aSAndrew Lunn return 0; 7741323061aSAndrew Lunn 7751323061aSAndrew Lunn case hwmon_temp_crit: 7761323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 7771323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7781323061aSAndrew Lunn return 0; 7791323061aSAndrew Lunn 7801323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7811323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7821323061aSAndrew Lunn if (err < 0) 7831323061aSAndrew Lunn return err; 7841323061aSAndrew Lunn 7851323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 7861323061aSAndrew Lunn return 0; 7871323061aSAndrew Lunn 7881323061aSAndrew Lunn case hwmon_temp_min_alarm: 7891323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7901323061aSAndrew Lunn if (err < 0) 7911323061aSAndrew Lunn return err; 7921323061aSAndrew Lunn 7931323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 7941323061aSAndrew Lunn return 0; 7951323061aSAndrew Lunn 7961323061aSAndrew Lunn case hwmon_temp_max_alarm: 7971323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7981323061aSAndrew Lunn if (err < 0) 7991323061aSAndrew Lunn return err; 8001323061aSAndrew Lunn 8011323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 8021323061aSAndrew Lunn return 0; 8031323061aSAndrew Lunn 8041323061aSAndrew Lunn case hwmon_temp_crit_alarm: 8051323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8061323061aSAndrew Lunn if (err < 0) 8071323061aSAndrew Lunn return err; 8081323061aSAndrew Lunn 8091323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 8101323061aSAndrew Lunn return 0; 8111323061aSAndrew Lunn default: 8121323061aSAndrew Lunn return -EOPNOTSUPP; 8131323061aSAndrew Lunn } 8141323061aSAndrew Lunn 8151323061aSAndrew Lunn return -EOPNOTSUPP; 8161323061aSAndrew Lunn } 8171323061aSAndrew Lunn 8181323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 8191323061aSAndrew Lunn { 8201323061aSAndrew Lunn u8 status; 8211323061aSAndrew Lunn int err; 8221323061aSAndrew Lunn 8231323061aSAndrew Lunn switch (attr) { 8241323061aSAndrew Lunn case hwmon_in_input: 8251323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 8261323061aSAndrew Lunn 8271323061aSAndrew Lunn case hwmon_in_lcrit: 8281323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 8291323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8301323061aSAndrew Lunn return 0; 8311323061aSAndrew Lunn 8321323061aSAndrew Lunn case hwmon_in_min: 8331323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8341323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8351323061aSAndrew Lunn return 0; 8361323061aSAndrew Lunn 8371323061aSAndrew Lunn case hwmon_in_max: 8381323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8391323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8401323061aSAndrew Lunn return 0; 8411323061aSAndrew Lunn 8421323061aSAndrew Lunn case hwmon_in_crit: 8431323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8441323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8451323061aSAndrew Lunn return 0; 8461323061aSAndrew Lunn 8471323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8481323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8491323061aSAndrew Lunn if (err < 0) 8501323061aSAndrew Lunn return err; 8511323061aSAndrew Lunn 8521323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8531323061aSAndrew Lunn return 0; 8541323061aSAndrew Lunn 8551323061aSAndrew Lunn case hwmon_in_min_alarm: 8561323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8571323061aSAndrew Lunn if (err < 0) 8581323061aSAndrew Lunn return err; 8591323061aSAndrew Lunn 8601323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 8611323061aSAndrew Lunn return 0; 8621323061aSAndrew Lunn 8631323061aSAndrew Lunn case hwmon_in_max_alarm: 8641323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8651323061aSAndrew Lunn if (err < 0) 8661323061aSAndrew Lunn return err; 8671323061aSAndrew Lunn 8681323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8691323061aSAndrew Lunn return 0; 8701323061aSAndrew Lunn 8711323061aSAndrew Lunn case hwmon_in_crit_alarm: 8721323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8731323061aSAndrew Lunn if (err < 0) 8741323061aSAndrew Lunn return err; 8751323061aSAndrew Lunn 8761323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 8771323061aSAndrew Lunn return 0; 8781323061aSAndrew Lunn default: 8791323061aSAndrew Lunn return -EOPNOTSUPP; 8801323061aSAndrew Lunn } 8811323061aSAndrew Lunn 8821323061aSAndrew Lunn return -EOPNOTSUPP; 8831323061aSAndrew Lunn } 8841323061aSAndrew Lunn 8851323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 8861323061aSAndrew Lunn { 8871323061aSAndrew Lunn u8 status; 8881323061aSAndrew Lunn int err; 8891323061aSAndrew Lunn 8901323061aSAndrew Lunn switch (attr) { 8911323061aSAndrew Lunn case hwmon_curr_input: 8921323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 8931323061aSAndrew Lunn 8941323061aSAndrew Lunn case hwmon_curr_lcrit: 8951323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 8961323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8971323061aSAndrew Lunn return 0; 8981323061aSAndrew Lunn 8991323061aSAndrew Lunn case hwmon_curr_min: 9001323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 9011323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9021323061aSAndrew Lunn return 0; 9031323061aSAndrew Lunn 9041323061aSAndrew Lunn case hwmon_curr_max: 9051323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 9061323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9071323061aSAndrew Lunn return 0; 9081323061aSAndrew Lunn 9091323061aSAndrew Lunn case hwmon_curr_crit: 9101323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 9111323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9121323061aSAndrew Lunn return 0; 9131323061aSAndrew Lunn 9141323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9151323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9161323061aSAndrew Lunn if (err < 0) 9171323061aSAndrew Lunn return err; 9181323061aSAndrew Lunn 9191323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 9201323061aSAndrew Lunn return 0; 9211323061aSAndrew Lunn 9221323061aSAndrew Lunn case hwmon_curr_min_alarm: 9231323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9241323061aSAndrew Lunn if (err < 0) 9251323061aSAndrew Lunn return err; 9261323061aSAndrew Lunn 9271323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 9281323061aSAndrew Lunn return 0; 9291323061aSAndrew Lunn 9301323061aSAndrew Lunn case hwmon_curr_max_alarm: 9311323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9321323061aSAndrew Lunn if (err < 0) 9331323061aSAndrew Lunn return err; 9341323061aSAndrew Lunn 9351323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9361323061aSAndrew Lunn return 0; 9371323061aSAndrew Lunn 9381323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9391323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9401323061aSAndrew Lunn if (err < 0) 9411323061aSAndrew Lunn return err; 9421323061aSAndrew Lunn 9431323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9441323061aSAndrew Lunn return 0; 9451323061aSAndrew Lunn default: 9461323061aSAndrew Lunn return -EOPNOTSUPP; 9471323061aSAndrew Lunn } 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn return -EOPNOTSUPP; 9501323061aSAndrew Lunn } 9511323061aSAndrew Lunn 9521323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9531323061aSAndrew Lunn { 9541323061aSAndrew Lunn u8 status; 9551323061aSAndrew Lunn int err; 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn switch (attr) { 9581323061aSAndrew Lunn case hwmon_power_input: 9591323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9601323061aSAndrew Lunn 9611323061aSAndrew Lunn case hwmon_power_lcrit: 9621323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9631323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9641323061aSAndrew Lunn return 0; 9651323061aSAndrew Lunn 9661323061aSAndrew Lunn case hwmon_power_min: 9671323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9681323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9691323061aSAndrew Lunn return 0; 9701323061aSAndrew Lunn 9711323061aSAndrew Lunn case hwmon_power_max: 9721323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 9731323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9741323061aSAndrew Lunn return 0; 9751323061aSAndrew Lunn 9761323061aSAndrew Lunn case hwmon_power_crit: 9771323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 9781323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9791323061aSAndrew Lunn return 0; 9801323061aSAndrew Lunn 9811323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9821323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9831323061aSAndrew Lunn if (err < 0) 9841323061aSAndrew Lunn return err; 9851323061aSAndrew Lunn 9861323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 9871323061aSAndrew Lunn return 0; 9881323061aSAndrew Lunn 9891323061aSAndrew Lunn case hwmon_power_min_alarm: 9901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9911323061aSAndrew Lunn if (err < 0) 9921323061aSAndrew Lunn return err; 9931323061aSAndrew Lunn 9941323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 9951323061aSAndrew Lunn return 0; 9961323061aSAndrew Lunn 9971323061aSAndrew Lunn case hwmon_power_max_alarm: 9981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9991323061aSAndrew Lunn if (err < 0) 10001323061aSAndrew Lunn return err; 10011323061aSAndrew Lunn 10021323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 10031323061aSAndrew Lunn return 0; 10041323061aSAndrew Lunn 10051323061aSAndrew Lunn case hwmon_power_crit_alarm: 10061323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 10071323061aSAndrew Lunn if (err < 0) 10081323061aSAndrew Lunn return err; 10091323061aSAndrew Lunn 10101323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 10111323061aSAndrew Lunn return 0; 10121323061aSAndrew Lunn default: 10131323061aSAndrew Lunn return -EOPNOTSUPP; 10141323061aSAndrew Lunn } 10151323061aSAndrew Lunn 10161323061aSAndrew Lunn return -EOPNOTSUPP; 10171323061aSAndrew Lunn } 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 10201323061aSAndrew Lunn { 10211323061aSAndrew Lunn u8 status; 10221323061aSAndrew Lunn int err; 10231323061aSAndrew Lunn 10241323061aSAndrew Lunn switch (attr) { 10251323061aSAndrew Lunn case hwmon_power_input: 10261323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 10271323061aSAndrew Lunn 10281323061aSAndrew Lunn case hwmon_power_lcrit: 10291323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10301323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10311323061aSAndrew Lunn return 0; 10321323061aSAndrew Lunn 10331323061aSAndrew Lunn case hwmon_power_min: 10341323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10351323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10361323061aSAndrew Lunn return 0; 10371323061aSAndrew Lunn 10381323061aSAndrew Lunn case hwmon_power_max: 10391323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10401323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10411323061aSAndrew Lunn return 0; 10421323061aSAndrew Lunn 10431323061aSAndrew Lunn case hwmon_power_crit: 10441323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10451323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10461323061aSAndrew Lunn return 0; 10471323061aSAndrew Lunn 10481323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10501323061aSAndrew Lunn if (err < 0) 10511323061aSAndrew Lunn return err; 10521323061aSAndrew Lunn 10531323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10541323061aSAndrew Lunn return 0; 10551323061aSAndrew Lunn 10561323061aSAndrew Lunn case hwmon_power_min_alarm: 10571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10581323061aSAndrew Lunn if (err < 0) 10591323061aSAndrew Lunn return err; 10601323061aSAndrew Lunn 10611323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 10621323061aSAndrew Lunn return 0; 10631323061aSAndrew Lunn 10641323061aSAndrew Lunn case hwmon_power_max_alarm: 10651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10661323061aSAndrew Lunn if (err < 0) 10671323061aSAndrew Lunn return err; 10681323061aSAndrew Lunn 10691323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 10701323061aSAndrew Lunn return 0; 10711323061aSAndrew Lunn 10721323061aSAndrew Lunn case hwmon_power_crit_alarm: 10731323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10741323061aSAndrew Lunn if (err < 0) 10751323061aSAndrew Lunn return err; 10761323061aSAndrew Lunn 10771323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 10781323061aSAndrew Lunn return 0; 10791323061aSAndrew Lunn default: 10801323061aSAndrew Lunn return -EOPNOTSUPP; 10811323061aSAndrew Lunn } 10821323061aSAndrew Lunn 10831323061aSAndrew Lunn return -EOPNOTSUPP; 10841323061aSAndrew Lunn } 10851323061aSAndrew Lunn 10861323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 10871323061aSAndrew Lunn u32 attr, int channel, long *value) 10881323061aSAndrew Lunn { 10891323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 10901323061aSAndrew Lunn 10911323061aSAndrew Lunn switch (type) { 10921323061aSAndrew Lunn case hwmon_temp: 10931323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 10941323061aSAndrew Lunn case hwmon_in: 10951323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 10961323061aSAndrew Lunn case hwmon_curr: 10971323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 10981323061aSAndrew Lunn case hwmon_power: 10991323061aSAndrew Lunn switch (channel) { 11001323061aSAndrew Lunn case 0: 11011323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 11021323061aSAndrew Lunn case 1: 11031323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 11041323061aSAndrew Lunn default: 11051323061aSAndrew Lunn return -EOPNOTSUPP; 11061323061aSAndrew Lunn } 11071323061aSAndrew Lunn default: 11081323061aSAndrew Lunn return -EOPNOTSUPP; 11091323061aSAndrew Lunn } 11101323061aSAndrew Lunn } 11111323061aSAndrew Lunn 1112c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1113c1236979SAndrew Lunn "TX_power", 1114c1236979SAndrew Lunn "RX_power", 1115c1236979SAndrew Lunn }; 1116c1236979SAndrew Lunn 1117c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1118c1236979SAndrew Lunn enum hwmon_sensor_types type, 1119c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1120c1236979SAndrew Lunn { 1121c1236979SAndrew Lunn switch (type) { 1122c1236979SAndrew Lunn case hwmon_curr: 1123c1236979SAndrew Lunn switch (attr) { 1124c1236979SAndrew Lunn case hwmon_curr_label: 1125c1236979SAndrew Lunn *str = "bias"; 1126c1236979SAndrew Lunn return 0; 1127c1236979SAndrew Lunn default: 1128c1236979SAndrew Lunn return -EOPNOTSUPP; 1129c1236979SAndrew Lunn } 1130c1236979SAndrew Lunn break; 1131c1236979SAndrew Lunn case hwmon_temp: 1132c1236979SAndrew Lunn switch (attr) { 1133c1236979SAndrew Lunn case hwmon_temp_label: 1134c1236979SAndrew Lunn *str = "temperature"; 1135c1236979SAndrew Lunn return 0; 1136c1236979SAndrew Lunn default: 1137c1236979SAndrew Lunn return -EOPNOTSUPP; 1138c1236979SAndrew Lunn } 1139c1236979SAndrew Lunn break; 1140c1236979SAndrew Lunn case hwmon_in: 1141c1236979SAndrew Lunn switch (attr) { 1142c1236979SAndrew Lunn case hwmon_in_label: 1143c1236979SAndrew Lunn *str = "VCC"; 1144c1236979SAndrew Lunn return 0; 1145c1236979SAndrew Lunn default: 1146c1236979SAndrew Lunn return -EOPNOTSUPP; 1147c1236979SAndrew Lunn } 1148c1236979SAndrew Lunn break; 1149c1236979SAndrew Lunn case hwmon_power: 1150c1236979SAndrew Lunn switch (attr) { 1151c1236979SAndrew Lunn case hwmon_power_label: 1152c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1153c1236979SAndrew Lunn return 0; 1154c1236979SAndrew Lunn default: 1155c1236979SAndrew Lunn return -EOPNOTSUPP; 1156c1236979SAndrew Lunn } 1157c1236979SAndrew Lunn break; 1158c1236979SAndrew Lunn default: 1159c1236979SAndrew Lunn return -EOPNOTSUPP; 1160c1236979SAndrew Lunn } 1161c1236979SAndrew Lunn 1162c1236979SAndrew Lunn return -EOPNOTSUPP; 1163c1236979SAndrew Lunn } 1164c1236979SAndrew Lunn 11651323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11661323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11671323061aSAndrew Lunn .read = sfp_hwmon_read, 1168c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11691323061aSAndrew Lunn }; 11701323061aSAndrew Lunn 11711323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 11721323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 11731323061aSAndrew Lunn 0, 11741323061aSAndrew Lunn }; 11751323061aSAndrew Lunn 11761323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 11771323061aSAndrew Lunn .type = hwmon_chip, 11781323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 11791323061aSAndrew Lunn }; 11801323061aSAndrew Lunn 11811323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 11821323061aSAndrew Lunn HWMON_T_INPUT | 11831323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 11841323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 11851323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1186c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1187c1236979SAndrew Lunn HWMON_T_LABEL, 11881323061aSAndrew Lunn 0, 11891323061aSAndrew Lunn }; 11901323061aSAndrew Lunn 11911323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 11921323061aSAndrew Lunn .type = hwmon_temp, 11931323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 11941323061aSAndrew Lunn }; 11951323061aSAndrew Lunn 11961323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 11971323061aSAndrew Lunn HWMON_I_INPUT | 11981323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 11991323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 12001323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1201c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1202c1236979SAndrew Lunn HWMON_I_LABEL, 12031323061aSAndrew Lunn 0, 12041323061aSAndrew Lunn }; 12051323061aSAndrew Lunn 12061323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 12071323061aSAndrew Lunn .type = hwmon_in, 12081323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 12091323061aSAndrew Lunn }; 12101323061aSAndrew Lunn 12111323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 12121323061aSAndrew Lunn HWMON_C_INPUT | 12131323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 12141323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 12151323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1216c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1217c1236979SAndrew Lunn HWMON_C_LABEL, 12181323061aSAndrew Lunn 0, 12191323061aSAndrew Lunn }; 12201323061aSAndrew Lunn 12211323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 12221323061aSAndrew Lunn .type = hwmon_curr, 12231323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 12241323061aSAndrew Lunn }; 12251323061aSAndrew Lunn 12261323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 12271323061aSAndrew Lunn /* Transmit power */ 12281323061aSAndrew Lunn HWMON_P_INPUT | 12291323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12301323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12311323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1232c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1233c1236979SAndrew Lunn HWMON_P_LABEL, 12341323061aSAndrew Lunn /* Receive 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 0, 12421323061aSAndrew Lunn }; 12431323061aSAndrew Lunn 12441323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 12451323061aSAndrew Lunn .type = hwmon_power, 12461323061aSAndrew Lunn .config = sfp_hwmon_power_config, 12471323061aSAndrew Lunn }; 12481323061aSAndrew Lunn 12491323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 12501323061aSAndrew Lunn &sfp_hwmon_chip, 12511323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 12521323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 12531323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 12541323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 12551323061aSAndrew Lunn NULL, 12561323061aSAndrew Lunn }; 12571323061aSAndrew Lunn 12581323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12591323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12601323061aSAndrew Lunn .info = sfp_hwmon_info, 12611323061aSAndrew Lunn }; 12621323061aSAndrew Lunn 1263139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12641323061aSAndrew Lunn { 1265139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12661323061aSAndrew Lunn int err, i; 12671323061aSAndrew Lunn 1268139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1269139d3a21SRussell King if (err < 0) { 1270139d3a21SRussell King if (sfp->hwmon_tries--) { 1271139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1272139d3a21SRussell King T_PROBE_RETRY_SLOW); 1273139d3a21SRussell King } else { 1274139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1275139d3a21SRussell King } 1276139d3a21SRussell King return; 1277139d3a21SRussell King } 1278139d3a21SRussell King 1279139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1280139d3a21SRussell King if (!sfp->hwmon_name) { 1281139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1282139d3a21SRussell King return; 1283139d3a21SRussell King } 1284139d3a21SRussell King 1285139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1286139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1287139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1288139d3a21SRussell King 1289139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1290139d3a21SRussell King sfp->hwmon_name, sfp, 1291139d3a21SRussell King &sfp_hwmon_chip_info, 1292139d3a21SRussell King NULL); 1293139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1294139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1295139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1296139d3a21SRussell King } 1297139d3a21SRussell King 1298139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1299139d3a21SRussell King { 13001323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 13011323061aSAndrew Lunn return 0; 13021323061aSAndrew Lunn 13031323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 13041323061aSAndrew Lunn return 0; 13051323061aSAndrew Lunn 13061323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 13071323061aSAndrew Lunn /* This driver in general does not support address 13081323061aSAndrew Lunn * change. 13091323061aSAndrew Lunn */ 13101323061aSAndrew Lunn return 0; 13111323061aSAndrew Lunn 1312139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1313139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 13141323061aSAndrew Lunn 1315139d3a21SRussell King return 0; 13161323061aSAndrew Lunn } 13171323061aSAndrew Lunn 13181323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13191323061aSAndrew Lunn { 1320139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13213e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13221323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13233e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13241323061aSAndrew Lunn kfree(sfp->hwmon_name); 13251323061aSAndrew Lunn } 13263e322474SAndrew Lunn } 1327139d3a21SRussell King 1328139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1329139d3a21SRussell King { 1330139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1331139d3a21SRussell King 1332139d3a21SRussell King return 0; 1333139d3a21SRussell King } 1334139d3a21SRussell King 1335139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1336139d3a21SRussell King { 1337139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1338139d3a21SRussell King } 13391323061aSAndrew Lunn #else 13401323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13411323061aSAndrew Lunn { 13421323061aSAndrew Lunn return 0; 13431323061aSAndrew Lunn } 13441323061aSAndrew Lunn 13451323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13461323061aSAndrew Lunn { 13471323061aSAndrew Lunn } 1348139d3a21SRussell King 1349139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1350139d3a21SRussell King { 1351139d3a21SRussell King return 0; 1352139d3a21SRussell King } 1353139d3a21SRussell King 1354139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1355139d3a21SRussell King { 1356139d3a21SRussell King } 13571323061aSAndrew Lunn #endif 13581323061aSAndrew Lunn 135973970055SRussell King /* Helpers */ 136073970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 136173970055SRussell King { 136273970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 136373970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 136473970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 136573970055SRussell King sfp_set_state(sfp, sfp->state); 136673970055SRussell King } 136773970055SRussell King 136873970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 136973970055SRussell King { 137073970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 137173970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 137273970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 137373970055SRussell King sfp_set_state(sfp, sfp->state); 137473970055SRussell King } 137573970055SRussell King 137673970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 137773970055SRussell King { 137873970055SRussell King unsigned int state = sfp->state; 137973970055SRussell King 138073970055SRussell King if (state & SFP_F_TX_DISABLE) 138173970055SRussell King return; 138273970055SRussell King 138373970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 138473970055SRussell King 138573970055SRussell King udelay(T_RESET_US); 138673970055SRussell King 138773970055SRussell King sfp_set_state(sfp, state); 138873970055SRussell King } 138973970055SRussell King 139073970055SRussell King /* SFP state machine */ 139173970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 139273970055SRussell King { 139373970055SRussell King if (timeout) 139473970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 139573970055SRussell King timeout); 139673970055SRussell King else 139773970055SRussell King cancel_delayed_work(&sfp->timeout); 139873970055SRussell King } 139973970055SRussell King 140073970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 140173970055SRussell King unsigned int timeout) 140273970055SRussell King { 140373970055SRussell King sfp->sm_state = state; 140473970055SRussell King sfp_sm_set_timer(sfp, timeout); 140573970055SRussell King } 140673970055SRussell King 14070936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1408516b29edSFlorian Fainelli unsigned int timeout) 140973970055SRussell King { 141073970055SRussell King sfp->sm_mod_state = state; 141173970055SRussell King sfp_sm_set_timer(sfp, timeout); 141273970055SRussell King } 141373970055SRussell King 141473970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 141573970055SRussell King { 141673970055SRussell King sfp_remove_phy(sfp->sfp_bus); 141773970055SRussell King phy_device_remove(sfp->mod_phy); 141873970055SRussell King phy_device_free(sfp->mod_phy); 141973970055SRussell King sfp->mod_phy = NULL; 142073970055SRussell King } 142173970055SRussell King 1422256e43cbSRussell King static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) 142373970055SRussell King { 142473970055SRussell King struct phy_device *phy; 142573970055SRussell King int err; 142673970055SRussell King 14279a484621SRussell King phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); 14281cb89a14SRussell King if (phy == ERR_PTR(-ENODEV)) 14291cb89a14SRussell King return PTR_ERR(phy); 143020b56ed9SRussell King if (IS_ERR(phy)) { 143120b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 1432256e43cbSRussell King return PTR_ERR(phy); 143373970055SRussell King } 143473970055SRussell King 14359a484621SRussell King err = phy_device_register(phy); 14369a484621SRussell King if (err) { 14379a484621SRussell King phy_device_free(phy); 14389a484621SRussell King dev_err(sfp->dev, "phy_device_register failed: %d\n", err); 1439256e43cbSRussell King return err; 14409a484621SRussell King } 14419a484621SRussell King 144273970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 144373970055SRussell King if (err) { 144473970055SRussell King phy_device_remove(phy); 144573970055SRussell King phy_device_free(phy); 144673970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 1447256e43cbSRussell King return err; 144873970055SRussell King } 144973970055SRussell King 145073970055SRussell King sfp->mod_phy = phy; 1451256e43cbSRussell King 1452256e43cbSRussell King return 0; 145373970055SRussell King } 145473970055SRussell King 145573970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 145673970055SRussell King { 145773970055SRussell King sfp_link_up(sfp->sfp_bus); 145873970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 145973970055SRussell King } 146073970055SRussell King 146173970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 146273970055SRussell King { 146373970055SRussell King sfp_link_down(sfp->sfp_bus); 146473970055SRussell King } 146573970055SRussell King 146673970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 146773970055SRussell King { 146873970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 146973970055SRussell King 1470710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1471710dfbb0SRussell King * are set, we assume that no LOS signal is available. 147273970055SRussell King */ 1473acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 147473970055SRussell King los ^= SFP_F_LOS; 1475710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1476710dfbb0SRussell King los = 0; 147773970055SRussell King 147873970055SRussell King if (los) 147973970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 148073970055SRussell King else 148173970055SRussell King sfp_sm_link_up(sfp); 148273970055SRussell King } 148373970055SRussell King 1484710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1485710dfbb0SRussell King { 1486710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1487710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1488710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1489710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1490710dfbb0SRussell King } 1491710dfbb0SRussell King 1492710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1493710dfbb0SRussell King { 1494710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1495710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1496710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1497710dfbb0SRussell King event == SFP_E_LOS_LOW); 1498710dfbb0SRussell King } 1499710dfbb0SRussell King 150063ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 150173970055SRussell King { 1502281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1503516b29edSFlorian Fainelli dev_err(sfp->dev, 1504516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 150573970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 150673970055SRussell King } else { 150773970055SRussell King if (warn) 150873970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 150973970055SRussell King 151063ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 151173970055SRussell King } 151273970055SRussell King } 151373970055SRussell King 15149a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 15159a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 15169a484621SRussell King * or clause 45 PHY. 15179a484621SRussell King * 15189a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 15199a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 15209a484621SRussell King * PHY driver to determine. 15219a484621SRussell King * 15229a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 15239a484621SRussell King * mode according to the negotiated line speed. 15249a484621SRussell King */ 1525256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1526181f29daSRussell King { 1527256e43cbSRussell King int err = 0; 1528256e43cbSRussell King 15299a484621SRussell King switch (sfp->id.base.extended_cc) { 15309a484621SRussell King case SFF8024_ECC_10GBASE_T_SFI: 15319a484621SRussell King case SFF8024_ECC_10GBASE_T_SR: 15329a484621SRussell King case SFF8024_ECC_5GBASE_T: 15339a484621SRussell King case SFF8024_ECC_2_5GBASE_T: 1534256e43cbSRussell King err = sfp_sm_probe_phy(sfp, true); 15359a484621SRussell King break; 15369a484621SRussell King 15379a484621SRussell King default: 1538fa2de660SRussell King if (sfp->id.base.e1000_base_t) 1539256e43cbSRussell King err = sfp_sm_probe_phy(sfp, false); 15409a484621SRussell King break; 15419a484621SRussell King } 1542256e43cbSRussell King return err; 154373970055SRussell King } 154473970055SRussell King 1545ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 15463bb35261SJon Nettleton { 1547ed32abb1SRussell King u32 power_mW = 1000; 15483bb35261SJon Nettleton 15493bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1550ed32abb1SRussell King power_mW = 1500; 15513bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1552ed32abb1SRussell King power_mW = 2000; 15533bb35261SJon Nettleton 1554ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 15557cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 15567cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 15577cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 15587cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 15597cfa9c92SRussell King /* The module appears not to implement bus address 15607cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 15617cfa9c92SRussell King * indicated mode. 15627cfa9c92SRussell King */ 15633bb35261SJon Nettleton dev_err(sfp->dev, 15643bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1565ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15663bb35261SJon Nettleton return -EINVAL; 15677cfa9c92SRussell King } else { 15683bb35261SJon Nettleton dev_warn(sfp->dev, 15693bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1570ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15713bb35261SJon Nettleton return 0; 15723bb35261SJon Nettleton } 15737cfa9c92SRussell King } 15747cfa9c92SRussell King 15757cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 15767cfa9c92SRussell King * an address change sequence, warn the user that the module may 15777cfa9c92SRussell King * not be functional. 15787cfa9c92SRussell King */ 15797cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 15807cfa9c92SRussell King dev_warn(sfp->dev, 158107f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 15827cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 15837cfa9c92SRussell King return 0; 15847cfa9c92SRussell King } 15853bb35261SJon Nettleton 1586ed32abb1SRussell King sfp->module_power_mW = power_mW; 1587ed32abb1SRussell King 1588ed32abb1SRussell King return 0; 1589ed32abb1SRussell King } 1590ed32abb1SRussell King 1591b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1592ed32abb1SRussell King { 1593ed32abb1SRussell King u8 val; 1594ed32abb1SRussell King int err; 1595ed32abb1SRussell King 15963bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 15973bb35261SJon Nettleton if (err != sizeof(val)) { 15983bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 1599b036a554SRussell King return -EAGAIN; 16003bb35261SJon Nettleton } 16013bb35261SJon Nettleton 16029a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 16039a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 16049a484621SRussell King * if the bit is already set, we're already in high power mode. 16059a484621SRussell King */ 16069a484621SRussell King if (!!(val & BIT(0)) == enable) 16079a484621SRussell King return 0; 16089a484621SRussell King 1609b036a554SRussell King if (enable) 16103bb35261SJon Nettleton val |= BIT(0); 1611b036a554SRussell King else 1612b036a554SRussell King val &= ~BIT(0); 16133bb35261SJon Nettleton 16143bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16153bb35261SJon Nettleton if (err != sizeof(val)) { 16163bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 1617b036a554SRussell King return -EAGAIN; 16183bb35261SJon Nettleton } 16193bb35261SJon Nettleton 1620b036a554SRussell King if (enable) 16213bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1622ed32abb1SRussell King sfp->module_power_mW / 1000, 1623ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 16243bb35261SJon Nettleton 1625b036a554SRussell King return 0; 16263bb35261SJon Nettleton } 16273bb35261SJon Nettleton 1628e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 162973970055SRussell King { 163073970055SRussell King /* SFP module inserted - read I2C data */ 163173970055SRussell King struct sfp_eeprom_id id; 1632981f1f80SRussell King bool cotsworks; 163373970055SRussell King u8 check; 16343bb35261SJon Nettleton int ret; 163573970055SRussell King 16363bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 16373bb35261SJon Nettleton if (ret < 0) { 1638e117be74SRussell King if (report) 16393bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 164073970055SRussell King return -EAGAIN; 164173970055SRussell King } 164273970055SRussell King 16433bb35261SJon Nettleton if (ret != sizeof(id)) { 16443bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 164573970055SRussell King return -EAGAIN; 164673970055SRussell King } 164773970055SRussell King 1648981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1649981f1f80SRussell King * do the final programming with the final module part number, 1650981f1f80SRussell King * serial number and date code. 1651981f1f80SRussell King */ 1652981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1653981f1f80SRussell King 165473970055SRussell King /* Validate the checksum over the base structure */ 165573970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 165673970055SRussell King if (check != id.base.cc_base) { 1657981f1f80SRussell King if (cotsworks) { 1658981f1f80SRussell King dev_warn(sfp->dev, 1659981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1660981f1f80SRussell King check, id.base.cc_base); 1661981f1f80SRussell King } else { 166273970055SRussell King dev_err(sfp->dev, 1663981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1664981f1f80SRussell King check, id.base.cc_base); 166573970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1666981f1f80SRussell King 16, 1, &id, sizeof(id), true); 166773970055SRussell King return -EINVAL; 166873970055SRussell King } 1669981f1f80SRussell King } 167073970055SRussell King 167173970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 167273970055SRussell King if (check != id.ext.cc_ext) { 1673981f1f80SRussell King if (cotsworks) { 1674981f1f80SRussell King dev_warn(sfp->dev, 1675981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1676981f1f80SRussell King check, id.ext.cc_ext); 1677981f1f80SRussell King } else { 167873970055SRussell King dev_err(sfp->dev, 1679981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1680981f1f80SRussell King check, id.ext.cc_ext); 1681981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1682981f1f80SRussell King 16, 1, &id, sizeof(id), true); 168373970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 168473970055SRussell King } 1685981f1f80SRussell King } 168673970055SRussell King 168773970055SRussell King sfp->id = id; 168873970055SRussell King 1689a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1690a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1691a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1692a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1693a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1694a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 169573970055SRussell King 1696259c8618SRussell King /* Check whether we support this module */ 1697f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1698259c8618SRussell King dev_err(sfp->dev, 1699259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 170073970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 170173970055SRussell King return -EINVAL; 170273970055SRussell King } 170373970055SRussell King 1704ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1705ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1706ec7681bdSRussell King dev_warn(sfp->dev, 1707ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1708ec7681bdSRussell King 1709ed32abb1SRussell King /* Parse the module power requirement */ 1710ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1711ed32abb1SRussell King if (ret < 0) 1712ed32abb1SRussell King return ret; 1713ed32abb1SRussell King 171426c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 171526c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 171626c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 171726c97a2dSRussell King else 171826c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 171926c97a2dSRussell King 1720b036a554SRussell King return 0; 172173970055SRussell King } 172273970055SRussell King 172373970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 172473970055SRussell King { 172573f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 172673970055SRussell King sfp_module_remove(sfp->sfp_bus); 172773970055SRussell King 17281323061aSAndrew Lunn sfp_hwmon_remove(sfp); 17291323061aSAndrew Lunn 173073970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1731ed32abb1SRussell King sfp->module_power_mW = 0; 173273970055SRussell King 173373970055SRussell King dev_info(sfp->dev, "module removed\n"); 173473970055SRussell King } 173573970055SRussell King 17366b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1737e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 173873970055SRussell King { 1739e85d81a1SRussell King switch (sfp->sm_dev_state) { 1740e85d81a1SRussell King default: 17416b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 17426b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 17436b0da5c9SRussell King break; 17446b0da5c9SRussell King 17456b0da5c9SRussell King case SFP_DEV_DOWN: 17466b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 17476b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 17486b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1749e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1750e85d81a1SRussell King break; 175173970055SRussell King 1752e85d81a1SRussell King case SFP_DEV_UP: 17536b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 17546b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 17556b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1756e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1757e85d81a1SRussell King break; 1758e85d81a1SRussell King } 1759e85d81a1SRussell King } 176073970055SRussell King 1761d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1762d900954fSRussell King * the on-board EEPROM, and sets up the power level. 176373970055SRussell King */ 1764e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1765e85d81a1SRussell King { 1766b036a554SRussell King int err; 1767b036a554SRussell King 1768b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1769b036a554SRussell King if (event == SFP_E_REMOVE) { 1770d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1771d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1772b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1773b036a554SRussell King return; 1774b036a554SRussell King } 1775b036a554SRussell King 1776b036a554SRussell King /* Handle device detach globally */ 177773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 177873f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1779b036a554SRussell King if (sfp->module_power_mW > 1000 && 1780b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1781b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 178273f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1783d2e816c0SRussell King return; 1784d2e816c0SRussell King } 1785d2e816c0SRussell King 178673970055SRussell King switch (sfp->sm_mod_state) { 178773970055SRussell King default: 1788e117be74SRussell King if (event == SFP_E_INSERT) { 1789d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 1790e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 1791e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 1792e117be74SRussell King } 179373970055SRussell King break; 179473970055SRussell King 179573970055SRussell King case SFP_MOD_PROBE: 179673f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 1797b036a554SRussell King if (event != SFP_E_TIMEOUT) 1798b036a554SRussell King break; 179973970055SRussell King 1800e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 1801b036a554SRussell King if (err == -EAGAIN) { 1802e117be74SRussell King if (sfp->sm_mod_tries_init && 1803e117be74SRussell King --sfp->sm_mod_tries_init) { 1804e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 1805b036a554SRussell King break; 1806e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 1807e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 1808e117be74SRussell King dev_warn(sfp->dev, 1809e117be74SRussell King "please wait, module slow to respond\n"); 1810e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 1811e117be74SRussell King break; 1812e117be74SRussell King } 1813b036a554SRussell King } 1814b036a554SRussell King if (err < 0) { 1815b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 1816b036a554SRussell King break; 1817b036a554SRussell King } 1818b036a554SRussell King 181938ecd706SRussell King err = sfp_hwmon_insert(sfp); 182038ecd706SRussell King if (err) 182138ecd706SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 182238ecd706SRussell King 182373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 182473f5e847SRussell King /* fall through */ 182573f5e847SRussell King case SFP_MOD_WAITDEV: 182673f5e847SRussell King /* Ensure that the device is attached before proceeding */ 182773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 182873f5e847SRussell King break; 182973f5e847SRussell King 183073f5e847SRussell King /* Report the module insertion to the upstream device */ 183173f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 183273f5e847SRussell King if (err < 0) { 183373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 183473f5e847SRussell King break; 183573f5e847SRussell King } 183673f5e847SRussell King 1837b036a554SRussell King /* If this is a power level 1 module, we are done */ 1838b036a554SRussell King if (sfp->module_power_mW <= 1000) 1839b036a554SRussell King goto insert; 1840b036a554SRussell King 1841b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 1842b036a554SRussell King /* fall through */ 1843b036a554SRussell King case SFP_MOD_HPOWER: 1844b036a554SRussell King /* Enable high power mode */ 1845b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 184673f5e847SRussell King if (err < 0) { 184773f5e847SRussell King if (err != -EAGAIN) { 184873f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 18490936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 185073f5e847SRussell King } else { 1851e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 185273f5e847SRussell King } 185373f5e847SRussell King break; 185473f5e847SRussell King } 185573f5e847SRussell King 185673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 185773970055SRussell King break; 185873970055SRussell King 1859b036a554SRussell King case SFP_MOD_WAITPWR: 1860b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 1861b036a554SRussell King if (event != SFP_E_TIMEOUT) 1862b036a554SRussell King break; 1863b036a554SRussell King 1864b036a554SRussell King insert: 18650936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 18663bb35261SJon Nettleton break; 1867b036a554SRussell King 186873970055SRussell King case SFP_MOD_PRESENT: 186973970055SRussell King case SFP_MOD_ERROR: 187073970055SRussell King break; 187173970055SRussell King } 187273970055SRussell King } 187373970055SRussell King 1874e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 1875e85d81a1SRussell King { 1876eefa6f1fSRussell King unsigned long timeout; 18771cb89a14SRussell King int ret; 1878eefa6f1fSRussell King 187973970055SRussell King /* Some events are global */ 188073970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 188173970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 188273970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 188373970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 188473970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 188573970055SRussell King sfp_sm_link_down(sfp); 188674c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 188774c551caSRussell King sfp_module_stop(sfp->sfp_bus); 188873970055SRussell King if (sfp->mod_phy) 188973970055SRussell King sfp_sm_phy_detach(sfp); 18901539e0d3SRussell King sfp_module_tx_disable(sfp); 1891f3c9a666SRussell King sfp_soft_stop_poll(sfp); 189273970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 189373970055SRussell King return; 189473970055SRussell King } 189573970055SRussell King 189673970055SRussell King /* The main state machine */ 189773970055SRussell King switch (sfp->sm_state) { 189873970055SRussell King case SFP_S_DOWN: 1899eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 1900eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 1901eefa6f1fSRussell King break; 1902eefa6f1fSRussell King 1903f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 1904f3c9a666SRussell King sfp_soft_start_poll(sfp); 1905f3c9a666SRussell King 1906f3c9a666SRussell King sfp_module_tx_enable(sfp); 1907eefa6f1fSRussell King 1908eefa6f1fSRussell King /* Initialise the fault clearance retries */ 1909281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 1910eefa6f1fSRussell King 1911eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 1912eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 1913eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 1914eefa6f1fSRussell King */ 1915eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 1916eefa6f1fSRussell King break; 1917eefa6f1fSRussell King 1918eefa6f1fSRussell King case SFP_S_WAIT: 1919eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 1920eefa6f1fSRussell King break; 1921eefa6f1fSRussell King 1922eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 192326c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 192426c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 192526c97a2dSRussell King * initialise, which is indicated by TX_FAULT 192626c97a2dSRussell King * deasserting. 1927181f29daSRussell King */ 192826c97a2dSRussell King timeout = sfp->module_t_start_up; 1929eefa6f1fSRussell King if (timeout > T_WAIT) 1930eefa6f1fSRussell King timeout -= T_WAIT; 1931eefa6f1fSRussell King else 1932eefa6f1fSRussell King timeout = 1; 1933eefa6f1fSRussell King 1934eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 1935eefa6f1fSRussell King } else { 1936eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 1937eefa6f1fSRussell King * finished initialising. 1938eefa6f1fSRussell King */ 1939eefa6f1fSRussell King goto init_done; 1940181f29daSRussell King } 194173970055SRussell King break; 194273970055SRussell King 194373970055SRussell King case SFP_S_INIT: 1944d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 194526c97a2dSRussell King /* TX_FAULT is still asserted after t_init or 194626c97a2dSRussell King * or t_start_up, so assume there is a fault. 1947d23751a0SRussell King */ 1948d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 1949281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 1950d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 19511cb89a14SRussell King init_done: 19521cb89a14SRussell King sfp->sm_phy_retries = R_PHY_RETRY; 19531cb89a14SRussell King goto phy_probe; 19541cb89a14SRussell King } 19551cb89a14SRussell King break; 19561cb89a14SRussell King 19571cb89a14SRussell King case SFP_S_INIT_PHY: 19581cb89a14SRussell King if (event != SFP_E_TIMEOUT) 19591cb89a14SRussell King break; 19601cb89a14SRussell King phy_probe: 19611cb89a14SRussell King /* TX_FAULT deasserted or we timed out with TX_FAULT 1962d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 1963d23751a0SRussell King */ 19641cb89a14SRussell King ret = sfp_sm_probe_for_phy(sfp); 19651cb89a14SRussell King if (ret == -ENODEV) { 19661cb89a14SRussell King if (--sfp->sm_phy_retries) { 19671cb89a14SRussell King sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); 19681cb89a14SRussell King break; 19691cb89a14SRussell King } else { 19701cb89a14SRussell King dev_info(sfp->dev, "no PHY detected\n"); 19711cb89a14SRussell King } 19721cb89a14SRussell King } else if (ret) { 1973256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 1974256e43cbSRussell King break; 1975256e43cbSRussell King } 197674c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 197774c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 197874c551caSRussell King break; 197974c551caSRussell King } 1980d23751a0SRussell King sfp_sm_link_check_los(sfp); 1981d23751a0SRussell King 1982d23751a0SRussell King /* Reset the fault retry count */ 1983281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 1984d23751a0SRussell King break; 1985d23751a0SRussell King 1986d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 1987d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 1988d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 198926c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 1990d23751a0SRussell King } 199173970055SRussell King break; 199273970055SRussell King 199373970055SRussell King case SFP_S_WAIT_LOS: 199473970055SRussell King if (event == SFP_E_TX_FAULT) 199563ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1996710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 199773970055SRussell King sfp_sm_link_up(sfp); 199873970055SRussell King break; 199973970055SRussell King 200073970055SRussell King case SFP_S_LINK_UP: 200173970055SRussell King if (event == SFP_E_TX_FAULT) { 200273970055SRussell King sfp_sm_link_down(sfp); 200363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 2004710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 200573970055SRussell King sfp_sm_link_down(sfp); 200673970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 200773970055SRussell King } 200873970055SRussell King break; 200973970055SRussell King 201073970055SRussell King case SFP_S_TX_FAULT: 201173970055SRussell King if (event == SFP_E_TIMEOUT) { 201273970055SRussell King sfp_module_tx_fault_reset(sfp); 201326c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 201473970055SRussell King } 201573970055SRussell King break; 201673970055SRussell King 201773970055SRussell King case SFP_S_REINIT: 201873970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 201963ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 202073970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 202173970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 202273970055SRussell King sfp_sm_link_check_los(sfp); 202373970055SRussell King } 202473970055SRussell King break; 202573970055SRussell King 202673970055SRussell King case SFP_S_TX_DISABLE: 202773970055SRussell King break; 202873970055SRussell King } 2029e85d81a1SRussell King } 2030e85d81a1SRussell King 2031e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2032e85d81a1SRussell King { 2033e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2034e85d81a1SRussell King 2035e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2036e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2037e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2038e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2039e85d81a1SRussell King event_to_str(event)); 2040e85d81a1SRussell King 2041e85d81a1SRussell King sfp_sm_device(sfp, event); 20426b0da5c9SRussell King sfp_sm_module(sfp, event); 2043e85d81a1SRussell King sfp_sm_main(sfp, event); 204473970055SRussell King 20454005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 20464005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 20474005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 20484005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 204973970055SRussell King 205073970055SRussell King mutex_unlock(&sfp->sm_mutex); 205173970055SRussell King } 205273970055SRussell King 2053b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2054b5bfc21aSRussell King { 20556b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2056b5bfc21aSRussell King } 2057b5bfc21aSRussell King 2058b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2059b5bfc21aSRussell King { 20606b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2061b5bfc21aSRussell King } 2062b5bfc21aSRussell King 206373970055SRussell King static void sfp_start(struct sfp *sfp) 206473970055SRussell King { 206573970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 206673970055SRussell King } 206773970055SRussell King 206873970055SRussell King static void sfp_stop(struct sfp *sfp) 206973970055SRussell King { 207073970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 207173970055SRussell King } 207273970055SRussell King 207373970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 207473970055SRussell King { 207573970055SRussell King /* locking... and check module is present */ 207673970055SRussell King 2077ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2078ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 207973970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 208073970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 208173970055SRussell King } else { 208273970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 208373970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 208473970055SRussell King } 208573970055SRussell King return 0; 208673970055SRussell King } 208773970055SRussell King 208873970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 208973970055SRussell King u8 *data) 209073970055SRussell King { 209173970055SRussell King unsigned int first, last, len; 209273970055SRussell King int ret; 209373970055SRussell King 209473970055SRussell King if (ee->len == 0) 209573970055SRussell King return -EINVAL; 209673970055SRussell King 209773970055SRussell King first = ee->offset; 209873970055SRussell King last = ee->offset + ee->len; 209973970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 210073970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 210173970055SRussell King len -= first; 210273970055SRussell King 21032794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 210473970055SRussell King if (ret < 0) 210573970055SRussell King return ret; 210673970055SRussell King 210773970055SRussell King first += len; 210873970055SRussell King data += len; 210973970055SRussell King } 21102794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 211173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 211273970055SRussell King len -= first; 211373970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 211473970055SRussell King 21152794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 211673970055SRussell King if (ret < 0) 211773970055SRussell King return ret; 211873970055SRussell King } 211973970055SRussell King return 0; 212073970055SRussell King } 212173970055SRussell King 212273970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2123b5bfc21aSRussell King .attach = sfp_attach, 2124b5bfc21aSRussell King .detach = sfp_detach, 212573970055SRussell King .start = sfp_start, 212673970055SRussell King .stop = sfp_stop, 212773970055SRussell King .module_info = sfp_module_info, 212873970055SRussell King .module_eeprom = sfp_module_eeprom, 212973970055SRussell King }; 213073970055SRussell King 213173970055SRussell King static void sfp_timeout(struct work_struct *work) 213273970055SRussell King { 213373970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 213473970055SRussell King 213573970055SRussell King rtnl_lock(); 213673970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 213773970055SRussell King rtnl_unlock(); 213873970055SRussell King } 213973970055SRussell King 214073970055SRussell King static void sfp_check_state(struct sfp *sfp) 214173970055SRussell King { 214273970055SRussell King unsigned int state, i, changed; 214373970055SRussell King 21442158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 214573970055SRussell King state = sfp_get_state(sfp); 214673970055SRussell King changed = state ^ sfp->state; 214773970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 214873970055SRussell King 214973970055SRussell King for (i = 0; i < GPIO_MAX; i++) 215073970055SRussell King if (changed & BIT(i)) 215173970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 215273970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 215373970055SRussell King 215473970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 215573970055SRussell King sfp->state = state; 215673970055SRussell King 215773970055SRussell King rtnl_lock(); 215873970055SRussell King if (changed & SFP_F_PRESENT) 215973970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 216073970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 216173970055SRussell King 216273970055SRussell King if (changed & SFP_F_TX_FAULT) 216373970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 216473970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 216573970055SRussell King 216673970055SRussell King if (changed & SFP_F_LOS) 216773970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 216873970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 216973970055SRussell King rtnl_unlock(); 21702158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 217173970055SRussell King } 217273970055SRussell King 217373970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 217473970055SRussell King { 217573970055SRussell King struct sfp *sfp = data; 217673970055SRussell King 217773970055SRussell King sfp_check_state(sfp); 217873970055SRussell King 217973970055SRussell King return IRQ_HANDLED; 218073970055SRussell King } 218173970055SRussell King 218273970055SRussell King static void sfp_poll(struct work_struct *work) 218373970055SRussell King { 218473970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 218573970055SRussell King 218673970055SRussell King sfp_check_state(sfp); 2187f3c9a666SRussell King 2188f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2189f3c9a666SRussell King sfp->need_poll) 219073970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 219173970055SRussell King } 219273970055SRussell King 219373970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 219473970055SRussell King { 219573970055SRussell King struct sfp *sfp; 219673970055SRussell King 219773970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 219873970055SRussell King if (!sfp) 219973970055SRussell King return ERR_PTR(-ENOMEM); 220073970055SRussell King 220173970055SRussell King sfp->dev = dev; 220273970055SRussell King 220373970055SRussell King mutex_init(&sfp->sm_mutex); 22042158e856SRobert Hancock mutex_init(&sfp->st_mutex); 220573970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 220673970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 220773970055SRussell King 2208139d3a21SRussell King sfp_hwmon_init(sfp); 2209139d3a21SRussell King 221073970055SRussell King return sfp; 221173970055SRussell King } 221273970055SRussell King 221373970055SRussell King static void sfp_cleanup(void *data) 221473970055SRussell King { 221573970055SRussell King struct sfp *sfp = data; 221673970055SRussell King 2217139d3a21SRussell King sfp_hwmon_exit(sfp); 2218139d3a21SRussell King 221973970055SRussell King cancel_delayed_work_sync(&sfp->poll); 222073970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 222173970055SRussell King if (sfp->i2c_mii) { 222273970055SRussell King mdiobus_unregister(sfp->i2c_mii); 222373970055SRussell King mdiobus_free(sfp->i2c_mii); 222473970055SRussell King } 222573970055SRussell King if (sfp->i2c) 222673970055SRussell King i2c_put_adapter(sfp->i2c); 222773970055SRussell King kfree(sfp); 222873970055SRussell King } 222973970055SRussell King 223073970055SRussell King static int sfp_probe(struct platform_device *pdev) 223173970055SRussell King { 2232259c8618SRussell King const struct sff_data *sff; 22337ce236faSRuslan Babayev struct i2c_adapter *i2c; 223473970055SRussell King struct sfp *sfp; 2235257c2559SRobert Hancock int err, i; 223673970055SRussell King 223773970055SRussell King sfp = sfp_alloc(&pdev->dev); 223873970055SRussell King if (IS_ERR(sfp)) 223973970055SRussell King return PTR_ERR(sfp); 224073970055SRussell King 224173970055SRussell King platform_set_drvdata(pdev, sfp); 224273970055SRussell King 224373970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 224473970055SRussell King if (err < 0) 224573970055SRussell King return err; 224673970055SRussell King 2247259c8618SRussell King sff = sfp->type = &sfp_data; 2248259c8618SRussell King 224973970055SRussell King if (pdev->dev.of_node) { 225073970055SRussell King struct device_node *node = pdev->dev.of_node; 2251259c8618SRussell King const struct of_device_id *id; 225273970055SRussell King struct device_node *np; 225373970055SRussell King 2254259c8618SRussell King id = of_match_node(sfp_of_match, node); 2255259c8618SRussell King if (WARN_ON(!id)) 2256259c8618SRussell King return -EINVAL; 2257259c8618SRussell King 2258259c8618SRussell King sff = sfp->type = id->data; 2259259c8618SRussell King 226073970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 226166ede1f9SAntoine Tenart if (!np) { 226266ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 226366ede1f9SAntoine Tenart return -ENODEV; 226466ede1f9SAntoine Tenart } 226573970055SRussell King 226673970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 226773970055SRussell King of_node_put(np); 22687ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 22697ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 22707ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 22717ce236faSRuslan Babayev struct fwnode_reference_args args; 22727ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 22737ce236faSRuslan Babayev int ret; 22747ce236faSRuslan Babayev 22757ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 22761086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 22777ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 22787ce236faSRuslan Babayev return -ENODEV; 22797ce236faSRuslan Babayev } 22807ce236faSRuslan Babayev 22817ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 22827ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 22837ce236faSRuslan Babayev } else { 22847ce236faSRuslan Babayev return -EINVAL; 22857ce236faSRuslan Babayev } 22867ce236faSRuslan Babayev 228773970055SRussell King if (!i2c) 228873970055SRussell King return -EPROBE_DEFER; 228973970055SRussell King 229073970055SRussell King err = sfp_i2c_configure(sfp, i2c); 229173970055SRussell King if (err < 0) { 229273970055SRussell King i2c_put_adapter(i2c); 229373970055SRussell King return err; 229473970055SRussell King } 229573970055SRussell King 2296259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2297259c8618SRussell King if (sff->gpios & BIT(i)) { 229873970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 229973970055SRussell King gpio_of_names[i], gpio_flags[i]); 230073970055SRussell King if (IS_ERR(sfp->gpio[i])) 230173970055SRussell King return PTR_ERR(sfp->gpio[i]); 230273970055SRussell King } 230373970055SRussell King 230473970055SRussell King sfp->get_state = sfp_gpio_get_state; 230573970055SRussell King sfp->set_state = sfp_gpio_set_state; 2306259c8618SRussell King 2307259c8618SRussell King /* Modules that have no detect signal are always present */ 2308259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2309259c8618SRussell King sfp->get_state = sff_gpio_get_state; 231073970055SRussell King 23113bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 23123bb35261SJon Nettleton &sfp->max_power_mW); 23133bb35261SJon Nettleton if (!sfp->max_power_mW) 23143bb35261SJon Nettleton sfp->max_power_mW = 1000; 23153bb35261SJon Nettleton 23163bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 23173bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 23183bb35261SJon Nettleton 231973970055SRussell King /* Get the initial state, and always signal TX disable, 232073970055SRussell King * since the network interface will not be up. 232173970055SRussell King */ 232273970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 232373970055SRussell King 232473970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 232573970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 232673970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 232773970055SRussell King sfp_set_state(sfp, sfp->state); 232873970055SRussell King sfp_module_tx_disable(sfp); 232973f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 233073f5e847SRussell King rtnl_lock(); 233173f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 233273f5e847SRussell King rtnl_unlock(); 233373f5e847SRussell King } 233473970055SRussell King 233573970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 233673970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 233773970055SRussell King continue; 233873970055SRussell King 2339257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 2340257c2559SRobert Hancock if (!sfp->gpio_irq[i]) { 2341f3c9a666SRussell King sfp->need_poll = true; 234273970055SRussell King continue; 234373970055SRussell King } 234473970055SRussell King 2345257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2346257c2559SRobert Hancock NULL, sfp_irq, 234773970055SRussell King IRQF_ONESHOT | 234873970055SRussell King IRQF_TRIGGER_RISING | 234973970055SRussell King IRQF_TRIGGER_FALLING, 235073970055SRussell King dev_name(sfp->dev), sfp); 2351257c2559SRobert Hancock if (err) { 2352257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2353f3c9a666SRussell King sfp->need_poll = true; 235473970055SRussell King } 2355257c2559SRobert Hancock } 235673970055SRussell King 2357f3c9a666SRussell King if (sfp->need_poll) 235873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 235973970055SRussell King 2360a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2361a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2362a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2363a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2364a1f5d1f0SAntoine Tenart */ 2365a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2366a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2367a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2368a1f5d1f0SAntoine Tenart 2369b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2370b5bfc21aSRussell King if (!sfp->sfp_bus) 2371b5bfc21aSRussell King return -ENOMEM; 2372b5bfc21aSRussell King 237373970055SRussell King return 0; 237473970055SRussell King } 237573970055SRussell King 237673970055SRussell King static int sfp_remove(struct platform_device *pdev) 237773970055SRussell King { 237873970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 237973970055SRussell King 238073970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 238173970055SRussell King 23820cb96b57SRussell King rtnl_lock(); 23830cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 23840cb96b57SRussell King rtnl_unlock(); 23850cb96b57SRussell King 238673970055SRussell King return 0; 238773970055SRussell King } 238873970055SRussell King 2389257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2390257c2559SRobert Hancock { 2391257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2392257c2559SRobert Hancock int i; 2393257c2559SRobert Hancock 2394257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2395257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2396257c2559SRobert Hancock continue; 2397257c2559SRobert Hancock 2398257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2399257c2559SRobert Hancock } 2400257c2559SRobert Hancock 2401257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2402257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2403257c2559SRobert Hancock } 2404257c2559SRobert Hancock 240573970055SRussell King static struct platform_driver sfp_driver = { 240673970055SRussell King .probe = sfp_probe, 240773970055SRussell King .remove = sfp_remove, 2408257c2559SRobert Hancock .shutdown = sfp_shutdown, 240973970055SRussell King .driver = { 241073970055SRussell King .name = "sfp", 241173970055SRussell King .of_match_table = sfp_of_match, 241273970055SRussell King }, 241373970055SRussell King }; 241473970055SRussell King 241573970055SRussell King static int sfp_init(void) 241673970055SRussell King { 241773970055SRussell King poll_jiffies = msecs_to_jiffies(100); 241873970055SRussell King 241973970055SRussell King return platform_driver_register(&sfp_driver); 242073970055SRussell King } 242173970055SRussell King module_init(sfp_init); 242273970055SRussell King 242373970055SRussell King static void sfp_exit(void) 242473970055SRussell King { 242573970055SRussell King platform_driver_unregister(&sfp_driver); 242673970055SRussell King } 242773970055SRussell King module_exit(sfp_exit); 242873970055SRussell King 242973970055SRussell King MODULE_ALIAS("platform:sfp"); 243073970055SRussell King MODULE_AUTHOR("Russell King"); 243173970055SRussell King MODULE_LICENSE("GPL v2"); 2432