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, 3973970055SRussell King SFP_E_DEV_DOWN, 4073970055SRussell King SFP_E_DEV_UP, 4173970055SRussell King SFP_E_TX_FAULT, 4273970055SRussell King SFP_E_TX_CLEAR, 4373970055SRussell King SFP_E_LOS_HIGH, 4473970055SRussell King SFP_E_LOS_LOW, 4573970055SRussell King SFP_E_TIMEOUT, 4673970055SRussell King 4773970055SRussell King SFP_MOD_EMPTY = 0, 4873970055SRussell King SFP_MOD_PROBE, 493bb35261SJon Nettleton SFP_MOD_HPOWER, 5073970055SRussell King SFP_MOD_PRESENT, 5173970055SRussell King SFP_MOD_ERROR, 5273970055SRussell King 5373970055SRussell King SFP_DEV_DOWN = 0, 5473970055SRussell King SFP_DEV_UP, 5573970055SRussell King 5673970055SRussell King SFP_S_DOWN = 0, 5773970055SRussell King SFP_S_INIT, 5873970055SRussell King SFP_S_WAIT_LOS, 5973970055SRussell King SFP_S_LINK_UP, 6073970055SRussell King SFP_S_TX_FAULT, 6173970055SRussell King SFP_S_REINIT, 6273970055SRussell King SFP_S_TX_DISABLE, 6373970055SRussell King }; 6473970055SRussell King 654005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 664005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 674005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 684005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 694005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 704005a7cbSAndrew Lunn [SFP_MOD_ERROR] = "error", 714005a7cbSAndrew Lunn }; 724005a7cbSAndrew Lunn 734005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 744005a7cbSAndrew Lunn { 754005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 764005a7cbSAndrew Lunn return "Unknown module state"; 774005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 784005a7cbSAndrew Lunn } 794005a7cbSAndrew Lunn 804005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 814005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 824005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 834005a7cbSAndrew Lunn }; 844005a7cbSAndrew Lunn 854005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 864005a7cbSAndrew Lunn { 874005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 884005a7cbSAndrew Lunn return "Unknown device state"; 894005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 904005a7cbSAndrew Lunn } 914005a7cbSAndrew Lunn 924005a7cbSAndrew Lunn static const char * const event_strings[] = { 934005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 944005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 954005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 964005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 974005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 984005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 994005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1004005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1014005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1024005a7cbSAndrew Lunn }; 1034005a7cbSAndrew Lunn 1044005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1054005a7cbSAndrew Lunn { 1064005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1074005a7cbSAndrew Lunn return "Unknown event"; 1084005a7cbSAndrew Lunn return event_strings[event]; 1094005a7cbSAndrew Lunn } 1104005a7cbSAndrew Lunn 1114005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1124005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 1134005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1144005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1154005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1164005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1174005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 1184005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_disable", 1194005a7cbSAndrew Lunn }; 1204005a7cbSAndrew Lunn 1214005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1224005a7cbSAndrew Lunn { 1234005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1244005a7cbSAndrew Lunn return "Unknown state"; 1254005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1264005a7cbSAndrew Lunn } 1274005a7cbSAndrew Lunn 12873970055SRussell King static const char *gpio_of_names[] = { 12925ee0793SBaruch Siach "mod-def0", 13073970055SRussell King "los", 13173970055SRussell King "tx-fault", 13273970055SRussell King "tx-disable", 13325ee0793SBaruch Siach "rate-select0", 13473970055SRussell King }; 13573970055SRussell King 13673970055SRussell King static const enum gpiod_flags gpio_flags[] = { 13773970055SRussell King GPIOD_IN, 13873970055SRussell King GPIOD_IN, 13973970055SRussell King GPIOD_IN, 14073970055SRussell King GPIOD_ASIS, 14173970055SRussell King GPIOD_ASIS, 14273970055SRussell King }; 14373970055SRussell King 14473970055SRussell King #define T_INIT_JIFFIES msecs_to_jiffies(300) 14573970055SRussell King #define T_RESET_US 10 14673970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 14773970055SRussell King 14873970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 14973970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 15073970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 15173970055SRussell King * 15273970055SRussell King * The SFP MSA specifies 300ms as t_init (the time taken for TX_FAULT to 15373970055SRussell King * be deasserted) but makes no mention of the earliest time before we can 15473970055SRussell King * access the I2C EEPROM. However, Avago modules require 300ms. 15573970055SRussell King */ 15673970055SRussell King #define T_PROBE_INIT msecs_to_jiffies(300) 1573bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 15873970055SRussell King #define T_PROBE_RETRY msecs_to_jiffies(100) 15973970055SRussell King 160516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 16173970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 16273970055SRussell King */ 16373970055SRussell King #define SFP_PHY_ADDR 22 16473970055SRussell King 165516b29edSFlorian Fainelli /* Give this long for the PHY to reset. */ 16673970055SRussell King #define T_PHY_RESET_MS 50 16773970055SRussell King 168259c8618SRussell King struct sff_data { 169259c8618SRussell King unsigned int gpios; 170259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 171259c8618SRussell King }; 172259c8618SRussell King 17373970055SRussell King struct sfp { 17473970055SRussell King struct device *dev; 17573970055SRussell King struct i2c_adapter *i2c; 17673970055SRussell King struct mii_bus *i2c_mii; 17773970055SRussell King struct sfp_bus *sfp_bus; 17873970055SRussell King struct phy_device *mod_phy; 179259c8618SRussell King const struct sff_data *type; 1803bb35261SJon Nettleton u32 max_power_mW; 18173970055SRussell King 18273970055SRussell King unsigned int (*get_state)(struct sfp *); 18373970055SRussell King void (*set_state)(struct sfp *, unsigned int); 18473970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 1853bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 18673970055SRussell King 18773970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 188257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 18973970055SRussell King 190b5bfc21aSRussell King bool attached; 1912158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 19273970055SRussell King unsigned int state; 19373970055SRussell King struct delayed_work poll; 19473970055SRussell King struct delayed_work timeout; 1952158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 19673970055SRussell King unsigned char sm_mod_state; 19773970055SRussell King unsigned char sm_dev_state; 19873970055SRussell King unsigned short sm_state; 19973970055SRussell King unsigned int sm_retries; 20073970055SRussell King 20173970055SRussell King struct sfp_eeprom_id id; 2021323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2031323061aSAndrew Lunn struct sfp_diag diag; 2041323061aSAndrew Lunn struct device *hwmon_dev; 2051323061aSAndrew Lunn char *hwmon_name; 2061323061aSAndrew Lunn #endif 2071323061aSAndrew Lunn 20873970055SRussell King }; 20973970055SRussell King 210259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 211259c8618SRussell King { 212259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFF && 213259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 214259c8618SRussell King } 215259c8618SRussell King 216259c8618SRussell King static const struct sff_data sff_data = { 217259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 218259c8618SRussell King .module_supported = sff_module_supported, 219259c8618SRussell King }; 220259c8618SRussell King 221259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 222259c8618SRussell King { 223259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFP && 224259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 225259c8618SRussell King } 226259c8618SRussell King 227259c8618SRussell King static const struct sff_data sfp_data = { 228259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 229259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 230259c8618SRussell King .module_supported = sfp_module_supported, 231259c8618SRussell King }; 232259c8618SRussell King 233259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 234259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 235259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 236259c8618SRussell King { }, 237259c8618SRussell King }; 238259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 239259c8618SRussell King 24073970055SRussell King static unsigned long poll_jiffies; 24173970055SRussell King 24273970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 24373970055SRussell King { 24473970055SRussell King unsigned int i, state, v; 24573970055SRussell King 24673970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 24773970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 24873970055SRussell King continue; 24973970055SRussell King 25073970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 25173970055SRussell King if (v) 25273970055SRussell King state |= BIT(i); 25373970055SRussell King } 25473970055SRussell King 25573970055SRussell King return state; 25673970055SRussell King } 25773970055SRussell King 258259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 259259c8618SRussell King { 260259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 261259c8618SRussell King } 262259c8618SRussell King 26373970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 26473970055SRussell King { 26573970055SRussell King if (state & SFP_F_PRESENT) { 26673970055SRussell King /* If the module is present, drive the signals */ 26773970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 26873970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 26973970055SRussell King state & SFP_F_TX_DISABLE); 27073970055SRussell King if (state & SFP_F_RATE_SELECT) 27173970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 27273970055SRussell King state & SFP_F_RATE_SELECT); 27373970055SRussell King } else { 27473970055SRussell King /* Otherwise, let them float to the pull-ups */ 27573970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 27673970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 27773970055SRussell King if (state & SFP_F_RATE_SELECT) 27873970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 27973970055SRussell King } 28073970055SRussell King } 28173970055SRussell King 2823bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 2833bb35261SJon Nettleton size_t len) 28473970055SRussell King { 28573970055SRussell King struct i2c_msg msgs[2]; 2863bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 28728e74a7cSRussell King size_t this_len; 28873970055SRussell King int ret; 28973970055SRussell King 29073970055SRussell King msgs[0].addr = bus_addr; 29173970055SRussell King msgs[0].flags = 0; 29273970055SRussell King msgs[0].len = 1; 29373970055SRussell King msgs[0].buf = &dev_addr; 29473970055SRussell King msgs[1].addr = bus_addr; 29573970055SRussell King msgs[1].flags = I2C_M_RD; 29673970055SRussell King msgs[1].len = len; 29773970055SRussell King msgs[1].buf = buf; 29873970055SRussell King 29928e74a7cSRussell King while (len) { 30028e74a7cSRussell King this_len = len; 30128e74a7cSRussell King if (this_len > 16) 30228e74a7cSRussell King this_len = 16; 30328e74a7cSRussell King 30428e74a7cSRussell King msgs[1].len = this_len; 30528e74a7cSRussell King 3063bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 30773970055SRussell King if (ret < 0) 30873970055SRussell King return ret; 30973970055SRussell King 31028e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 31128e74a7cSRussell King break; 31228e74a7cSRussell King 31328e74a7cSRussell King msgs[1].buf += this_len; 31428e74a7cSRussell King dev_addr += this_len; 31528e74a7cSRussell King len -= this_len; 31628e74a7cSRussell King } 31728e74a7cSRussell King 31828e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 31973970055SRussell King } 32073970055SRussell King 3213bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 32273970055SRussell King size_t len) 32373970055SRussell King { 3243bb35261SJon Nettleton struct i2c_msg msgs[1]; 3253bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3263bb35261SJon Nettleton int ret; 3273bb35261SJon Nettleton 3283bb35261SJon Nettleton msgs[0].addr = bus_addr; 3293bb35261SJon Nettleton msgs[0].flags = 0; 3303bb35261SJon Nettleton msgs[0].len = 1 + len; 3313bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3323bb35261SJon Nettleton if (!msgs[0].buf) 3333bb35261SJon Nettleton return -ENOMEM; 3343bb35261SJon Nettleton 3353bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3363bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3373bb35261SJon Nettleton 3383bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3393bb35261SJon Nettleton 3403bb35261SJon Nettleton kfree(msgs[0].buf); 3413bb35261SJon Nettleton 3423bb35261SJon Nettleton if (ret < 0) 3433bb35261SJon Nettleton return ret; 3443bb35261SJon Nettleton 3453bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 34673970055SRussell King } 34773970055SRussell King 34873970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 34973970055SRussell King { 35073970055SRussell King struct mii_bus *i2c_mii; 35173970055SRussell King int ret; 35273970055SRussell King 35373970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 35473970055SRussell King return -EINVAL; 35573970055SRussell King 35673970055SRussell King sfp->i2c = i2c; 35773970055SRussell King sfp->read = sfp_i2c_read; 3583bb35261SJon Nettleton sfp->write = sfp_i2c_write; 35973970055SRussell King 36073970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 36173970055SRussell King if (IS_ERR(i2c_mii)) 36273970055SRussell King return PTR_ERR(i2c_mii); 36373970055SRussell King 36473970055SRussell King i2c_mii->name = "SFP I2C Bus"; 36573970055SRussell King i2c_mii->phy_mask = ~0; 36673970055SRussell King 36773970055SRussell King ret = mdiobus_register(i2c_mii); 36873970055SRussell King if (ret < 0) { 36973970055SRussell King mdiobus_free(i2c_mii); 37073970055SRussell King return ret; 37173970055SRussell King } 37273970055SRussell King 37373970055SRussell King sfp->i2c_mii = i2c_mii; 37473970055SRussell King 37573970055SRussell King return 0; 37673970055SRussell King } 37773970055SRussell King 37873970055SRussell King /* Interface */ 37973970055SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 38073970055SRussell King { 38173970055SRussell King return sfp->get_state(sfp); 38273970055SRussell King } 38373970055SRussell King 38473970055SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 38573970055SRussell King { 38673970055SRussell King sfp->set_state(sfp, state); 38773970055SRussell King } 38873970055SRussell King 38973970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 39073970055SRussell King { 39173970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 39273970055SRussell King } 39373970055SRussell King 3943bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 3953bb35261SJon Nettleton { 3963bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 3973bb35261SJon Nettleton } 3983bb35261SJon Nettleton 39973970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 40073970055SRussell King { 40173970055SRussell King u8 *p, check; 40273970055SRussell King 40373970055SRussell King for (p = buf, check = 0; len; p++, len--) 40473970055SRussell King check += *p; 40573970055SRussell King 40673970055SRussell King return check; 40773970055SRussell King } 40873970055SRussell King 4091323061aSAndrew Lunn /* hwmon */ 4101323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 4111323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 4121323061aSAndrew Lunn enum hwmon_sensor_types type, 4131323061aSAndrew Lunn u32 attr, int channel) 4141323061aSAndrew Lunn { 4151323061aSAndrew Lunn const struct sfp *sfp = data; 4161323061aSAndrew Lunn 4171323061aSAndrew Lunn switch (type) { 4181323061aSAndrew Lunn case hwmon_temp: 4191323061aSAndrew Lunn switch (attr) { 4201323061aSAndrew Lunn case hwmon_temp_min_alarm: 4211323061aSAndrew Lunn case hwmon_temp_max_alarm: 4221323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 4231323061aSAndrew Lunn case hwmon_temp_crit_alarm: 4241323061aSAndrew Lunn case hwmon_temp_min: 4251323061aSAndrew Lunn case hwmon_temp_max: 4261323061aSAndrew Lunn case hwmon_temp_lcrit: 4271323061aSAndrew Lunn case hwmon_temp_crit: 428a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 429a33710bdSAndrew Lunn return 0; 430a33710bdSAndrew Lunn /* fall through */ 431a33710bdSAndrew Lunn case hwmon_temp_input: 4321323061aSAndrew Lunn return 0444; 4331323061aSAndrew Lunn default: 4341323061aSAndrew Lunn return 0; 4351323061aSAndrew Lunn } 4361323061aSAndrew Lunn case hwmon_in: 4371323061aSAndrew Lunn switch (attr) { 4381323061aSAndrew Lunn case hwmon_in_min_alarm: 4391323061aSAndrew Lunn case hwmon_in_max_alarm: 4401323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 4411323061aSAndrew Lunn case hwmon_in_crit_alarm: 4421323061aSAndrew Lunn case hwmon_in_min: 4431323061aSAndrew Lunn case hwmon_in_max: 4441323061aSAndrew Lunn case hwmon_in_lcrit: 4451323061aSAndrew Lunn case hwmon_in_crit: 446a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 447a33710bdSAndrew Lunn return 0; 448a33710bdSAndrew Lunn /* fall through */ 449a33710bdSAndrew Lunn case hwmon_in_input: 4501323061aSAndrew Lunn return 0444; 4511323061aSAndrew Lunn default: 4521323061aSAndrew Lunn return 0; 4531323061aSAndrew Lunn } 4541323061aSAndrew Lunn case hwmon_curr: 4551323061aSAndrew Lunn switch (attr) { 4561323061aSAndrew Lunn case hwmon_curr_min_alarm: 4571323061aSAndrew Lunn case hwmon_curr_max_alarm: 4581323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 4591323061aSAndrew Lunn case hwmon_curr_crit_alarm: 4601323061aSAndrew Lunn case hwmon_curr_min: 4611323061aSAndrew Lunn case hwmon_curr_max: 4621323061aSAndrew Lunn case hwmon_curr_lcrit: 4631323061aSAndrew Lunn case hwmon_curr_crit: 464a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 465a33710bdSAndrew Lunn return 0; 466a33710bdSAndrew Lunn /* fall through */ 467a33710bdSAndrew Lunn case hwmon_curr_input: 4681323061aSAndrew Lunn return 0444; 4691323061aSAndrew Lunn default: 4701323061aSAndrew Lunn return 0; 4711323061aSAndrew Lunn } 4721323061aSAndrew Lunn case hwmon_power: 4731323061aSAndrew Lunn /* External calibration of receive power requires 4741323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 4751323061aSAndrew Lunn * is not easy, so just skip it. If the module does 4761323061aSAndrew Lunn * not require external calibration, we can however 4771323061aSAndrew Lunn * show receiver power, since FP is then not needed. 4781323061aSAndrew Lunn */ 4791323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 4801323061aSAndrew Lunn channel == 1) 4811323061aSAndrew Lunn return 0; 4821323061aSAndrew Lunn switch (attr) { 4831323061aSAndrew Lunn case hwmon_power_min_alarm: 4841323061aSAndrew Lunn case hwmon_power_max_alarm: 4851323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 4861323061aSAndrew Lunn case hwmon_power_crit_alarm: 4871323061aSAndrew Lunn case hwmon_power_min: 4881323061aSAndrew Lunn case hwmon_power_max: 4891323061aSAndrew Lunn case hwmon_power_lcrit: 4901323061aSAndrew Lunn case hwmon_power_crit: 491a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 492a33710bdSAndrew Lunn return 0; 493a33710bdSAndrew Lunn /* fall through */ 494a33710bdSAndrew Lunn case hwmon_power_input: 4951323061aSAndrew Lunn return 0444; 4961323061aSAndrew Lunn default: 4971323061aSAndrew Lunn return 0; 4981323061aSAndrew Lunn } 4991323061aSAndrew Lunn default: 5001323061aSAndrew Lunn return 0; 5011323061aSAndrew Lunn } 5021323061aSAndrew Lunn } 5031323061aSAndrew Lunn 5041323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 5051323061aSAndrew Lunn { 5061323061aSAndrew Lunn __be16 val; 5071323061aSAndrew Lunn int err; 5081323061aSAndrew Lunn 5091323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 5101323061aSAndrew Lunn if (err < 0) 5111323061aSAndrew Lunn return err; 5121323061aSAndrew Lunn 5131323061aSAndrew Lunn *value = be16_to_cpu(val); 5141323061aSAndrew Lunn 5151323061aSAndrew Lunn return 0; 5161323061aSAndrew Lunn } 5171323061aSAndrew Lunn 5181323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 5191323061aSAndrew Lunn { 5200cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5211323061aSAndrew Lunn } 5221323061aSAndrew Lunn 5231323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 5241323061aSAndrew Lunn long *value) 5251323061aSAndrew Lunn { 5261323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 5271323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 5281323061aSAndrew Lunn } 5291323061aSAndrew Lunn 5301323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 5311323061aSAndrew Lunn { 5321323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 5331323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 5341323061aSAndrew Lunn 5351323061aSAndrew Lunn if (*value >= 0x8000) 5361323061aSAndrew Lunn *value -= 0x10000; 5371323061aSAndrew Lunn 5381323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 5391323061aSAndrew Lunn } 5401323061aSAndrew Lunn 5411323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 5421323061aSAndrew Lunn { 5431323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 5441323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 5451323061aSAndrew Lunn 5461323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5471323061aSAndrew Lunn } 5481323061aSAndrew Lunn 5491323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 5501323061aSAndrew Lunn { 5511323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 5521323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 5531323061aSAndrew Lunn 5541323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 5551323061aSAndrew Lunn } 5561323061aSAndrew Lunn 5571323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 5581323061aSAndrew Lunn { 5591323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 5601323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 5611323061aSAndrew Lunn 5621323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5631323061aSAndrew Lunn } 5641323061aSAndrew Lunn 5651323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 5661323061aSAndrew Lunn { 5671323061aSAndrew Lunn int err; 5681323061aSAndrew Lunn 5691323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5701323061aSAndrew Lunn if (err < 0) 5711323061aSAndrew Lunn return err; 5721323061aSAndrew Lunn 5731323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 5741323061aSAndrew Lunn 5751323061aSAndrew Lunn return 0; 5761323061aSAndrew Lunn } 5771323061aSAndrew Lunn 5781323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 5791323061aSAndrew Lunn { 5801323061aSAndrew Lunn int err; 5811323061aSAndrew Lunn 5821323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5831323061aSAndrew Lunn if (err < 0) 5841323061aSAndrew Lunn return err; 5851323061aSAndrew Lunn 5861323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 5871323061aSAndrew Lunn 5881323061aSAndrew Lunn return 0; 5891323061aSAndrew Lunn } 5901323061aSAndrew Lunn 5911323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 5921323061aSAndrew Lunn { 5931323061aSAndrew Lunn int err; 5941323061aSAndrew Lunn 5951323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5961323061aSAndrew Lunn if (err < 0) 5971323061aSAndrew Lunn return err; 5981323061aSAndrew Lunn 5991323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 6001323061aSAndrew Lunn 6011323061aSAndrew Lunn return 0; 6021323061aSAndrew Lunn } 6031323061aSAndrew Lunn 6041323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 6051323061aSAndrew Lunn { 6061323061aSAndrew Lunn int err; 6071323061aSAndrew Lunn 6081323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6091323061aSAndrew Lunn if (err < 0) 6101323061aSAndrew Lunn return err; 6111323061aSAndrew Lunn 6121323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 6131323061aSAndrew Lunn 6141323061aSAndrew Lunn return 0; 6151323061aSAndrew Lunn } 6161323061aSAndrew Lunn 6171323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 6181323061aSAndrew Lunn { 6191323061aSAndrew Lunn int err; 6201323061aSAndrew Lunn 6211323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6221323061aSAndrew Lunn if (err < 0) 6231323061aSAndrew Lunn return err; 6241323061aSAndrew Lunn 6251323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 6261323061aSAndrew Lunn 6271323061aSAndrew Lunn return 0; 6281323061aSAndrew Lunn } 6291323061aSAndrew Lunn 6301323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 6311323061aSAndrew Lunn { 6321323061aSAndrew Lunn u8 status; 6331323061aSAndrew Lunn int err; 6341323061aSAndrew Lunn 6351323061aSAndrew Lunn switch (attr) { 6361323061aSAndrew Lunn case hwmon_temp_input: 6371323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 6381323061aSAndrew Lunn 6391323061aSAndrew Lunn case hwmon_temp_lcrit: 6401323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 6411323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6421323061aSAndrew Lunn return 0; 6431323061aSAndrew Lunn 6441323061aSAndrew Lunn case hwmon_temp_min: 6451323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 6461323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6471323061aSAndrew Lunn return 0; 6481323061aSAndrew Lunn case hwmon_temp_max: 6491323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 6501323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6511323061aSAndrew Lunn return 0; 6521323061aSAndrew Lunn 6531323061aSAndrew Lunn case hwmon_temp_crit: 6541323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 6551323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6561323061aSAndrew Lunn return 0; 6571323061aSAndrew Lunn 6581323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 6591323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6601323061aSAndrew Lunn if (err < 0) 6611323061aSAndrew Lunn return err; 6621323061aSAndrew Lunn 6631323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 6641323061aSAndrew Lunn return 0; 6651323061aSAndrew Lunn 6661323061aSAndrew Lunn case hwmon_temp_min_alarm: 6671323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6681323061aSAndrew Lunn if (err < 0) 6691323061aSAndrew Lunn return err; 6701323061aSAndrew Lunn 6711323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 6721323061aSAndrew Lunn return 0; 6731323061aSAndrew Lunn 6741323061aSAndrew Lunn case hwmon_temp_max_alarm: 6751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6761323061aSAndrew Lunn if (err < 0) 6771323061aSAndrew Lunn return err; 6781323061aSAndrew Lunn 6791323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 6801323061aSAndrew Lunn return 0; 6811323061aSAndrew Lunn 6821323061aSAndrew Lunn case hwmon_temp_crit_alarm: 6831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6841323061aSAndrew Lunn if (err < 0) 6851323061aSAndrew Lunn return err; 6861323061aSAndrew Lunn 6871323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 6881323061aSAndrew Lunn return 0; 6891323061aSAndrew Lunn default: 6901323061aSAndrew Lunn return -EOPNOTSUPP; 6911323061aSAndrew Lunn } 6921323061aSAndrew Lunn 6931323061aSAndrew Lunn return -EOPNOTSUPP; 6941323061aSAndrew Lunn } 6951323061aSAndrew Lunn 6961323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 6971323061aSAndrew Lunn { 6981323061aSAndrew Lunn u8 status; 6991323061aSAndrew Lunn int err; 7001323061aSAndrew Lunn 7011323061aSAndrew Lunn switch (attr) { 7021323061aSAndrew Lunn case hwmon_in_input: 7031323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 7041323061aSAndrew Lunn 7051323061aSAndrew Lunn case hwmon_in_lcrit: 7061323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 7071323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7081323061aSAndrew Lunn return 0; 7091323061aSAndrew Lunn 7101323061aSAndrew Lunn case hwmon_in_min: 7111323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 7121323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7131323061aSAndrew Lunn return 0; 7141323061aSAndrew Lunn 7151323061aSAndrew Lunn case hwmon_in_max: 7161323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 7171323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7181323061aSAndrew Lunn return 0; 7191323061aSAndrew Lunn 7201323061aSAndrew Lunn case hwmon_in_crit: 7211323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 7221323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7231323061aSAndrew Lunn return 0; 7241323061aSAndrew Lunn 7251323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7261323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7271323061aSAndrew Lunn if (err < 0) 7281323061aSAndrew Lunn return err; 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 7311323061aSAndrew Lunn return 0; 7321323061aSAndrew Lunn 7331323061aSAndrew Lunn case hwmon_in_min_alarm: 7341323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7351323061aSAndrew Lunn if (err < 0) 7361323061aSAndrew Lunn return err; 7371323061aSAndrew Lunn 7381323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 7391323061aSAndrew Lunn return 0; 7401323061aSAndrew Lunn 7411323061aSAndrew Lunn case hwmon_in_max_alarm: 7421323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7431323061aSAndrew Lunn if (err < 0) 7441323061aSAndrew Lunn return err; 7451323061aSAndrew Lunn 7461323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 7471323061aSAndrew Lunn return 0; 7481323061aSAndrew Lunn 7491323061aSAndrew Lunn case hwmon_in_crit_alarm: 7501323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7511323061aSAndrew Lunn if (err < 0) 7521323061aSAndrew Lunn return err; 7531323061aSAndrew Lunn 7541323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 7551323061aSAndrew Lunn return 0; 7561323061aSAndrew Lunn default: 7571323061aSAndrew Lunn return -EOPNOTSUPP; 7581323061aSAndrew Lunn } 7591323061aSAndrew Lunn 7601323061aSAndrew Lunn return -EOPNOTSUPP; 7611323061aSAndrew Lunn } 7621323061aSAndrew Lunn 7631323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 7641323061aSAndrew Lunn { 7651323061aSAndrew Lunn u8 status; 7661323061aSAndrew Lunn int err; 7671323061aSAndrew Lunn 7681323061aSAndrew Lunn switch (attr) { 7691323061aSAndrew Lunn case hwmon_curr_input: 7701323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 7711323061aSAndrew Lunn 7721323061aSAndrew Lunn case hwmon_curr_lcrit: 7731323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 7741323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7751323061aSAndrew Lunn return 0; 7761323061aSAndrew Lunn 7771323061aSAndrew Lunn case hwmon_curr_min: 7781323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 7791323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7801323061aSAndrew Lunn return 0; 7811323061aSAndrew Lunn 7821323061aSAndrew Lunn case hwmon_curr_max: 7831323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 7841323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7851323061aSAndrew Lunn return 0; 7861323061aSAndrew Lunn 7871323061aSAndrew Lunn case hwmon_curr_crit: 7881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 7891323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7901323061aSAndrew Lunn return 0; 7911323061aSAndrew Lunn 7921323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 7931323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7941323061aSAndrew Lunn if (err < 0) 7951323061aSAndrew Lunn return err; 7961323061aSAndrew Lunn 7971323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 7981323061aSAndrew Lunn return 0; 7991323061aSAndrew Lunn 8001323061aSAndrew Lunn case hwmon_curr_min_alarm: 8011323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8021323061aSAndrew Lunn if (err < 0) 8031323061aSAndrew Lunn return err; 8041323061aSAndrew Lunn 8051323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 8061323061aSAndrew Lunn return 0; 8071323061aSAndrew Lunn 8081323061aSAndrew Lunn case hwmon_curr_max_alarm: 8091323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8101323061aSAndrew Lunn if (err < 0) 8111323061aSAndrew Lunn return err; 8121323061aSAndrew Lunn 8131323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 8141323061aSAndrew Lunn return 0; 8151323061aSAndrew Lunn 8161323061aSAndrew Lunn case hwmon_curr_crit_alarm: 8171323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8181323061aSAndrew Lunn if (err < 0) 8191323061aSAndrew Lunn return err; 8201323061aSAndrew Lunn 8211323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 8221323061aSAndrew Lunn return 0; 8231323061aSAndrew Lunn default: 8241323061aSAndrew Lunn return -EOPNOTSUPP; 8251323061aSAndrew Lunn } 8261323061aSAndrew Lunn 8271323061aSAndrew Lunn return -EOPNOTSUPP; 8281323061aSAndrew Lunn } 8291323061aSAndrew Lunn 8301323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 8311323061aSAndrew Lunn { 8321323061aSAndrew Lunn u8 status; 8331323061aSAndrew Lunn int err; 8341323061aSAndrew Lunn 8351323061aSAndrew Lunn switch (attr) { 8361323061aSAndrew Lunn case hwmon_power_input: 8371323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 8381323061aSAndrew Lunn 8391323061aSAndrew Lunn case hwmon_power_lcrit: 8401323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 8411323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8421323061aSAndrew Lunn return 0; 8431323061aSAndrew Lunn 8441323061aSAndrew Lunn case hwmon_power_min: 8451323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 8461323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8471323061aSAndrew Lunn return 0; 8481323061aSAndrew Lunn 8491323061aSAndrew Lunn case hwmon_power_max: 8501323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 8511323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8521323061aSAndrew Lunn return 0; 8531323061aSAndrew Lunn 8541323061aSAndrew Lunn case hwmon_power_crit: 8551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 8561323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8571323061aSAndrew Lunn return 0; 8581323061aSAndrew Lunn 8591323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 8601323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8611323061aSAndrew Lunn if (err < 0) 8621323061aSAndrew Lunn return err; 8631323061aSAndrew Lunn 8641323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 8651323061aSAndrew Lunn return 0; 8661323061aSAndrew Lunn 8671323061aSAndrew Lunn case hwmon_power_min_alarm: 8681323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8691323061aSAndrew Lunn if (err < 0) 8701323061aSAndrew Lunn return err; 8711323061aSAndrew Lunn 8721323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 8731323061aSAndrew Lunn return 0; 8741323061aSAndrew Lunn 8751323061aSAndrew Lunn case hwmon_power_max_alarm: 8761323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8771323061aSAndrew Lunn if (err < 0) 8781323061aSAndrew Lunn return err; 8791323061aSAndrew Lunn 8801323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 8811323061aSAndrew Lunn return 0; 8821323061aSAndrew Lunn 8831323061aSAndrew Lunn case hwmon_power_crit_alarm: 8841323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8851323061aSAndrew Lunn if (err < 0) 8861323061aSAndrew Lunn return err; 8871323061aSAndrew Lunn 8881323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 8891323061aSAndrew Lunn return 0; 8901323061aSAndrew Lunn default: 8911323061aSAndrew Lunn return -EOPNOTSUPP; 8921323061aSAndrew Lunn } 8931323061aSAndrew Lunn 8941323061aSAndrew Lunn return -EOPNOTSUPP; 8951323061aSAndrew Lunn } 8961323061aSAndrew Lunn 8971323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 8981323061aSAndrew Lunn { 8991323061aSAndrew Lunn u8 status; 9001323061aSAndrew Lunn int err; 9011323061aSAndrew Lunn 9021323061aSAndrew Lunn switch (attr) { 9031323061aSAndrew Lunn case hwmon_power_input: 9041323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 9051323061aSAndrew Lunn 9061323061aSAndrew Lunn case hwmon_power_lcrit: 9071323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 9081323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9091323061aSAndrew Lunn return 0; 9101323061aSAndrew Lunn 9111323061aSAndrew Lunn case hwmon_power_min: 9121323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 9131323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9141323061aSAndrew Lunn return 0; 9151323061aSAndrew Lunn 9161323061aSAndrew Lunn case hwmon_power_max: 9171323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 9181323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9191323061aSAndrew Lunn return 0; 9201323061aSAndrew Lunn 9211323061aSAndrew Lunn case hwmon_power_crit: 9221323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 9231323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9241323061aSAndrew Lunn return 0; 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9271323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9281323061aSAndrew Lunn if (err < 0) 9291323061aSAndrew Lunn return err; 9301323061aSAndrew Lunn 9311323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 9321323061aSAndrew Lunn return 0; 9331323061aSAndrew Lunn 9341323061aSAndrew Lunn case hwmon_power_min_alarm: 9351323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9361323061aSAndrew Lunn if (err < 0) 9371323061aSAndrew Lunn return err; 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 9401323061aSAndrew Lunn return 0; 9411323061aSAndrew Lunn 9421323061aSAndrew Lunn case hwmon_power_max_alarm: 9431323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9441323061aSAndrew Lunn if (err < 0) 9451323061aSAndrew Lunn return err; 9461323061aSAndrew Lunn 9471323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 9481323061aSAndrew Lunn return 0; 9491323061aSAndrew Lunn 9501323061aSAndrew Lunn case hwmon_power_crit_alarm: 9511323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9521323061aSAndrew Lunn if (err < 0) 9531323061aSAndrew Lunn return err; 9541323061aSAndrew Lunn 9551323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 9561323061aSAndrew Lunn return 0; 9571323061aSAndrew Lunn default: 9581323061aSAndrew Lunn return -EOPNOTSUPP; 9591323061aSAndrew Lunn } 9601323061aSAndrew Lunn 9611323061aSAndrew Lunn return -EOPNOTSUPP; 9621323061aSAndrew Lunn } 9631323061aSAndrew Lunn 9641323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 9651323061aSAndrew Lunn u32 attr, int channel, long *value) 9661323061aSAndrew Lunn { 9671323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 9681323061aSAndrew Lunn 9691323061aSAndrew Lunn switch (type) { 9701323061aSAndrew Lunn case hwmon_temp: 9711323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 9721323061aSAndrew Lunn case hwmon_in: 9731323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 9741323061aSAndrew Lunn case hwmon_curr: 9751323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 9761323061aSAndrew Lunn case hwmon_power: 9771323061aSAndrew Lunn switch (channel) { 9781323061aSAndrew Lunn case 0: 9791323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 9801323061aSAndrew Lunn case 1: 9811323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 9821323061aSAndrew Lunn default: 9831323061aSAndrew Lunn return -EOPNOTSUPP; 9841323061aSAndrew Lunn } 9851323061aSAndrew Lunn default: 9861323061aSAndrew Lunn return -EOPNOTSUPP; 9871323061aSAndrew Lunn } 9881323061aSAndrew Lunn } 9891323061aSAndrew Lunn 9901323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 9911323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 9921323061aSAndrew Lunn .read = sfp_hwmon_read, 9931323061aSAndrew Lunn }; 9941323061aSAndrew Lunn 9951323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 9961323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 9971323061aSAndrew Lunn 0, 9981323061aSAndrew Lunn }; 9991323061aSAndrew Lunn 10001323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 10011323061aSAndrew Lunn .type = hwmon_chip, 10021323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 10031323061aSAndrew Lunn }; 10041323061aSAndrew Lunn 10051323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 10061323061aSAndrew Lunn HWMON_T_INPUT | 10071323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 10081323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 10091323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 10101323061aSAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM, 10111323061aSAndrew Lunn 0, 10121323061aSAndrew Lunn }; 10131323061aSAndrew Lunn 10141323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 10151323061aSAndrew Lunn .type = hwmon_temp, 10161323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 10171323061aSAndrew Lunn }; 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 10201323061aSAndrew Lunn HWMON_I_INPUT | 10211323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 10221323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 10231323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 10241323061aSAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM, 10251323061aSAndrew Lunn 0, 10261323061aSAndrew Lunn }; 10271323061aSAndrew Lunn 10281323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 10291323061aSAndrew Lunn .type = hwmon_in, 10301323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 10311323061aSAndrew Lunn }; 10321323061aSAndrew Lunn 10331323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 10341323061aSAndrew Lunn HWMON_C_INPUT | 10351323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 10361323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 10371323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 10381323061aSAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM, 10391323061aSAndrew Lunn 0, 10401323061aSAndrew Lunn }; 10411323061aSAndrew Lunn 10421323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 10431323061aSAndrew Lunn .type = hwmon_curr, 10441323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 10451323061aSAndrew Lunn }; 10461323061aSAndrew Lunn 10471323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 10481323061aSAndrew Lunn /* Transmit power */ 10491323061aSAndrew Lunn HWMON_P_INPUT | 10501323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 10511323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 10521323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 10531323061aSAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM, 10541323061aSAndrew Lunn /* Receive power */ 10551323061aSAndrew Lunn HWMON_P_INPUT | 10561323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 10571323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 10581323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 10591323061aSAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM, 10601323061aSAndrew Lunn 0, 10611323061aSAndrew Lunn }; 10621323061aSAndrew Lunn 10631323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 10641323061aSAndrew Lunn .type = hwmon_power, 10651323061aSAndrew Lunn .config = sfp_hwmon_power_config, 10661323061aSAndrew Lunn }; 10671323061aSAndrew Lunn 10681323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 10691323061aSAndrew Lunn &sfp_hwmon_chip, 10701323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 10711323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 10721323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 10731323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 10741323061aSAndrew Lunn NULL, 10751323061aSAndrew Lunn }; 10761323061aSAndrew Lunn 10771323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 10781323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 10791323061aSAndrew Lunn .info = sfp_hwmon_info, 10801323061aSAndrew Lunn }; 10811323061aSAndrew Lunn 10821323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 10831323061aSAndrew Lunn { 10841323061aSAndrew Lunn int err, i; 10851323061aSAndrew Lunn 10861323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 10871323061aSAndrew Lunn return 0; 10881323061aSAndrew Lunn 10891323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 10901323061aSAndrew Lunn return 0; 10911323061aSAndrew Lunn 10921323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 10931323061aSAndrew Lunn /* This driver in general does not support address 10941323061aSAndrew Lunn * change. 10951323061aSAndrew Lunn */ 10961323061aSAndrew Lunn return 0; 10971323061aSAndrew Lunn 10981323061aSAndrew Lunn err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 10991323061aSAndrew Lunn if (err < 0) 11001323061aSAndrew Lunn return err; 11011323061aSAndrew Lunn 11021323061aSAndrew Lunn sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 11031323061aSAndrew Lunn if (!sfp->hwmon_name) 11041323061aSAndrew Lunn return -ENODEV; 11051323061aSAndrew Lunn 11061323061aSAndrew Lunn for (i = 0; sfp->hwmon_name[i]; i++) 11071323061aSAndrew Lunn if (hwmon_is_bad_char(sfp->hwmon_name[i])) 11081323061aSAndrew Lunn sfp->hwmon_name[i] = '_'; 11091323061aSAndrew Lunn 11101323061aSAndrew Lunn sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 11111323061aSAndrew Lunn sfp->hwmon_name, sfp, 11121323061aSAndrew Lunn &sfp_hwmon_chip_info, 11131323061aSAndrew Lunn NULL); 11141323061aSAndrew Lunn 11151323061aSAndrew Lunn return PTR_ERR_OR_ZERO(sfp->hwmon_dev); 11161323061aSAndrew Lunn } 11171323061aSAndrew Lunn 11181323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 11191323061aSAndrew Lunn { 11203e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 11211323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 11223e322474SAndrew Lunn sfp->hwmon_dev = NULL; 11231323061aSAndrew Lunn kfree(sfp->hwmon_name); 11241323061aSAndrew Lunn } 11253e322474SAndrew Lunn } 11261323061aSAndrew Lunn #else 11271323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 11281323061aSAndrew Lunn { 11291323061aSAndrew Lunn return 0; 11301323061aSAndrew Lunn } 11311323061aSAndrew Lunn 11321323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 11331323061aSAndrew Lunn { 11341323061aSAndrew Lunn } 11351323061aSAndrew Lunn #endif 11361323061aSAndrew Lunn 113773970055SRussell King /* Helpers */ 113873970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 113973970055SRussell King { 114073970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 114173970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 114273970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 114373970055SRussell King sfp_set_state(sfp, sfp->state); 114473970055SRussell King } 114573970055SRussell King 114673970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 114773970055SRussell King { 114873970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 114973970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 115073970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 115173970055SRussell King sfp_set_state(sfp, sfp->state); 115273970055SRussell King } 115373970055SRussell King 115473970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 115573970055SRussell King { 115673970055SRussell King unsigned int state = sfp->state; 115773970055SRussell King 115873970055SRussell King if (state & SFP_F_TX_DISABLE) 115973970055SRussell King return; 116073970055SRussell King 116173970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 116273970055SRussell King 116373970055SRussell King udelay(T_RESET_US); 116473970055SRussell King 116573970055SRussell King sfp_set_state(sfp, state); 116673970055SRussell King } 116773970055SRussell King 116873970055SRussell King /* SFP state machine */ 116973970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 117073970055SRussell King { 117173970055SRussell King if (timeout) 117273970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 117373970055SRussell King timeout); 117473970055SRussell King else 117573970055SRussell King cancel_delayed_work(&sfp->timeout); 117673970055SRussell King } 117773970055SRussell King 117873970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 117973970055SRussell King unsigned int timeout) 118073970055SRussell King { 118173970055SRussell King sfp->sm_state = state; 118273970055SRussell King sfp_sm_set_timer(sfp, timeout); 118373970055SRussell King } 118473970055SRussell King 1185516b29edSFlorian Fainelli static void sfp_sm_ins_next(struct sfp *sfp, unsigned int state, 1186516b29edSFlorian Fainelli unsigned int timeout) 118773970055SRussell King { 118873970055SRussell King sfp->sm_mod_state = state; 118973970055SRussell King sfp_sm_set_timer(sfp, timeout); 119073970055SRussell King } 119173970055SRussell King 119273970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 119373970055SRussell King { 119473970055SRussell King phy_stop(sfp->mod_phy); 119573970055SRussell King sfp_remove_phy(sfp->sfp_bus); 119673970055SRussell King phy_device_remove(sfp->mod_phy); 119773970055SRussell King phy_device_free(sfp->mod_phy); 119873970055SRussell King sfp->mod_phy = NULL; 119973970055SRussell King } 120073970055SRussell King 120173970055SRussell King static void sfp_sm_probe_phy(struct sfp *sfp) 120273970055SRussell King { 120373970055SRussell King struct phy_device *phy; 120473970055SRussell King int err; 120573970055SRussell King 120673970055SRussell King msleep(T_PHY_RESET_MS); 120773970055SRussell King 120873970055SRussell King phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); 120920b56ed9SRussell King if (phy == ERR_PTR(-ENODEV)) { 121020b56ed9SRussell King dev_info(sfp->dev, "no PHY detected\n"); 121173970055SRussell King return; 121273970055SRussell King } 121320b56ed9SRussell King if (IS_ERR(phy)) { 121420b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 121573970055SRussell King return; 121673970055SRussell King } 121773970055SRussell King 121873970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 121973970055SRussell King if (err) { 122073970055SRussell King phy_device_remove(phy); 122173970055SRussell King phy_device_free(phy); 122273970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 122373970055SRussell King return; 122473970055SRussell King } 122573970055SRussell King 122673970055SRussell King sfp->mod_phy = phy; 122773970055SRussell King phy_start(phy); 122873970055SRussell King } 122973970055SRussell King 123073970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 123173970055SRussell King { 123273970055SRussell King sfp_link_up(sfp->sfp_bus); 123373970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 123473970055SRussell King } 123573970055SRussell King 123673970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 123773970055SRussell King { 123873970055SRussell King sfp_link_down(sfp->sfp_bus); 123973970055SRussell King } 124073970055SRussell King 124173970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 124273970055SRussell King { 124373970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 124473970055SRussell King 1245710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1246710dfbb0SRussell King * are set, we assume that no LOS signal is available. 124773970055SRussell King */ 1248acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 124973970055SRussell King los ^= SFP_F_LOS; 1250710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1251710dfbb0SRussell King los = 0; 125273970055SRussell King 125373970055SRussell King if (los) 125473970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 125573970055SRussell King else 125673970055SRussell King sfp_sm_link_up(sfp); 125773970055SRussell King } 125873970055SRussell King 1259710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1260710dfbb0SRussell King { 1261710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1262710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1263710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1264710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1265710dfbb0SRussell King } 1266710dfbb0SRussell King 1267710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1268710dfbb0SRussell King { 1269710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1270710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1271710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1272710dfbb0SRussell King event == SFP_E_LOS_LOW); 1273710dfbb0SRussell King } 1274710dfbb0SRussell King 127573970055SRussell King static void sfp_sm_fault(struct sfp *sfp, bool warn) 127673970055SRussell King { 127773970055SRussell King if (sfp->sm_retries && !--sfp->sm_retries) { 1278516b29edSFlorian Fainelli dev_err(sfp->dev, 1279516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 128073970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 128173970055SRussell King } else { 128273970055SRussell King if (warn) 128373970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 128473970055SRussell King 128573970055SRussell King sfp_sm_next(sfp, SFP_S_TX_FAULT, T_FAULT_RECOVER); 128673970055SRussell King } 128773970055SRussell King } 128873970055SRussell King 128973970055SRussell King static void sfp_sm_mod_init(struct sfp *sfp) 129073970055SRussell King { 129173970055SRussell King sfp_module_tx_enable(sfp); 129273970055SRussell King 129373970055SRussell King /* Wait t_init before indicating that the link is up, provided the 129473970055SRussell King * current state indicates no TX_FAULT. If TX_FAULT clears before 129573970055SRussell King * this time, that's fine too. 129673970055SRussell King */ 129773970055SRussell King sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); 129873970055SRussell King sfp->sm_retries = 5; 129973970055SRussell King 130073970055SRussell King /* Setting the serdes link mode is guesswork: there's no 130173970055SRussell King * field in the EEPROM which indicates what mode should 130273970055SRussell King * be used. 130373970055SRussell King * 130473970055SRussell King * If it's a gigabit-only fiber module, it probably does 130573970055SRussell King * not have a PHY, so switch to 802.3z negotiation mode. 130673970055SRussell King * Otherwise, switch to SGMII mode (which is required to 130773970055SRussell King * support non-gigabit speeds) and probe for a PHY. 130873970055SRussell King */ 130973970055SRussell King if (sfp->id.base.e1000_base_t || 131073970055SRussell King sfp->id.base.e100_base_lx || 131173970055SRussell King sfp->id.base.e100_base_fx) 131273970055SRussell King sfp_sm_probe_phy(sfp); 131373970055SRussell King } 131473970055SRussell King 13153bb35261SJon Nettleton static int sfp_sm_mod_hpower(struct sfp *sfp) 13163bb35261SJon Nettleton { 13173bb35261SJon Nettleton u32 power; 13183bb35261SJon Nettleton u8 val; 13193bb35261SJon Nettleton int err; 13203bb35261SJon Nettleton 13213bb35261SJon Nettleton power = 1000; 13223bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 13233bb35261SJon Nettleton power = 1500; 13243bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 13253bb35261SJon Nettleton power = 2000; 13263bb35261SJon Nettleton 13273bb35261SJon Nettleton if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE && 13283bb35261SJon Nettleton (sfp->id.ext.diagmon & (SFP_DIAGMON_DDM | SFP_DIAGMON_ADDRMODE)) != 13293bb35261SJon Nettleton SFP_DIAGMON_DDM) { 13303bb35261SJon Nettleton /* The module appears not to implement bus address 0xa2, 13313bb35261SJon Nettleton * or requires an address change sequence, so assume that 13323bb35261SJon Nettleton * the module powers up in the indicated power mode. 13333bb35261SJon Nettleton */ 13343bb35261SJon Nettleton if (power > sfp->max_power_mW) { 13353bb35261SJon Nettleton dev_err(sfp->dev, 13363bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 13373bb35261SJon Nettleton power / 1000, (power / 100) % 10); 13383bb35261SJon Nettleton return -EINVAL; 13393bb35261SJon Nettleton } 13403bb35261SJon Nettleton return 0; 13413bb35261SJon Nettleton } 13423bb35261SJon Nettleton 13433bb35261SJon Nettleton if (power > sfp->max_power_mW) { 13443bb35261SJon Nettleton dev_warn(sfp->dev, 13453bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 13463bb35261SJon Nettleton power / 1000, (power / 100) % 10); 13473bb35261SJon Nettleton return 0; 13483bb35261SJon Nettleton } 13493bb35261SJon Nettleton 13503bb35261SJon Nettleton if (power <= 1000) 13513bb35261SJon Nettleton return 0; 13523bb35261SJon Nettleton 13533bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 13543bb35261SJon Nettleton if (err != sizeof(val)) { 13553bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 13563bb35261SJon Nettleton err = -EAGAIN; 13573bb35261SJon Nettleton goto err; 13583bb35261SJon Nettleton } 13593bb35261SJon Nettleton 13603bb35261SJon Nettleton val |= BIT(0); 13613bb35261SJon Nettleton 13623bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 13633bb35261SJon Nettleton if (err != sizeof(val)) { 13643bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 13653bb35261SJon Nettleton err = -EAGAIN; 13663bb35261SJon Nettleton goto err; 13673bb35261SJon Nettleton } 13683bb35261SJon Nettleton 13693bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 13703bb35261SJon Nettleton power / 1000, (power / 100) % 10); 13713bb35261SJon Nettleton return T_HPOWER_LEVEL; 13723bb35261SJon Nettleton 13733bb35261SJon Nettleton err: 13743bb35261SJon Nettleton return err; 13753bb35261SJon Nettleton } 13763bb35261SJon Nettleton 137773970055SRussell King static int sfp_sm_mod_probe(struct sfp *sfp) 137873970055SRussell King { 137973970055SRussell King /* SFP module inserted - read I2C data */ 138073970055SRussell King struct sfp_eeprom_id id; 1381981f1f80SRussell King bool cotsworks; 138273970055SRussell King u8 check; 13833bb35261SJon Nettleton int ret; 138473970055SRussell King 13853bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 13863bb35261SJon Nettleton if (ret < 0) { 13873bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 138873970055SRussell King return -EAGAIN; 138973970055SRussell King } 139073970055SRussell King 13913bb35261SJon Nettleton if (ret != sizeof(id)) { 13923bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 139373970055SRussell King return -EAGAIN; 139473970055SRussell King } 139573970055SRussell King 1396981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1397981f1f80SRussell King * do the final programming with the final module part number, 1398981f1f80SRussell King * serial number and date code. 1399981f1f80SRussell King */ 1400981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1401981f1f80SRussell King 140273970055SRussell King /* Validate the checksum over the base structure */ 140373970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 140473970055SRussell King if (check != id.base.cc_base) { 1405981f1f80SRussell King if (cotsworks) { 1406981f1f80SRussell King dev_warn(sfp->dev, 1407981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1408981f1f80SRussell King check, id.base.cc_base); 1409981f1f80SRussell King } else { 141073970055SRussell King dev_err(sfp->dev, 1411981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1412981f1f80SRussell King check, id.base.cc_base); 141373970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1414981f1f80SRussell King 16, 1, &id, sizeof(id), true); 141573970055SRussell King return -EINVAL; 141673970055SRussell King } 1417981f1f80SRussell King } 141873970055SRussell King 141973970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 142073970055SRussell King if (check != id.ext.cc_ext) { 1421981f1f80SRussell King if (cotsworks) { 1422981f1f80SRussell King dev_warn(sfp->dev, 1423981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1424981f1f80SRussell King check, id.ext.cc_ext); 1425981f1f80SRussell King } else { 142673970055SRussell King dev_err(sfp->dev, 1427981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1428981f1f80SRussell King check, id.ext.cc_ext); 1429981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1430981f1f80SRussell King 16, 1, &id, sizeof(id), true); 143173970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 143273970055SRussell King } 1433981f1f80SRussell King } 143473970055SRussell King 143573970055SRussell King sfp->id = id; 143673970055SRussell King 1437a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1438a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1439a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1440a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1441a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1442a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 144373970055SRussell King 1444259c8618SRussell King /* Check whether we support this module */ 1445259c8618SRussell King if (!sfp->type->module_supported(&sfp->id)) { 1446259c8618SRussell King dev_err(sfp->dev, 1447259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 144873970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 144973970055SRussell King return -EINVAL; 145073970055SRussell King } 145173970055SRussell King 1452ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1453ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1454ec7681bdSRussell King dev_warn(sfp->dev, 1455ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1456ec7681bdSRussell King 14571323061aSAndrew Lunn ret = sfp_hwmon_insert(sfp); 14581323061aSAndrew Lunn if (ret < 0) 14591323061aSAndrew Lunn return ret; 14601323061aSAndrew Lunn 14613bb35261SJon Nettleton ret = sfp_module_insert(sfp->sfp_bus, &sfp->id); 14623bb35261SJon Nettleton if (ret < 0) 14633bb35261SJon Nettleton return ret; 14643bb35261SJon Nettleton 14653bb35261SJon Nettleton return sfp_sm_mod_hpower(sfp); 146673970055SRussell King } 146773970055SRussell King 146873970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 146973970055SRussell King { 147073970055SRussell King sfp_module_remove(sfp->sfp_bus); 147173970055SRussell King 14721323061aSAndrew Lunn sfp_hwmon_remove(sfp); 14731323061aSAndrew Lunn 147473970055SRussell King if (sfp->mod_phy) 147573970055SRussell King sfp_sm_phy_detach(sfp); 147673970055SRussell King 147773970055SRussell King sfp_module_tx_disable(sfp); 147873970055SRussell King 147973970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 148073970055SRussell King 148173970055SRussell King dev_info(sfp->dev, "module removed\n"); 148273970055SRussell King } 148373970055SRussell King 148473970055SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 148573970055SRussell King { 148673970055SRussell King mutex_lock(&sfp->sm_mutex); 148773970055SRussell King 14884005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 14894005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 14904005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 14914005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state), 14924005a7cbSAndrew Lunn event_to_str(event)); 149373970055SRussell King 149473970055SRussell King /* This state machine tracks the insert/remove state of 149573970055SRussell King * the module, and handles probing the on-board EEPROM. 149673970055SRussell King */ 149773970055SRussell King switch (sfp->sm_mod_state) { 149873970055SRussell King default: 1499b5bfc21aSRussell King if (event == SFP_E_INSERT && sfp->attached) { 150073970055SRussell King sfp_module_tx_disable(sfp); 150173970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_PROBE, T_PROBE_INIT); 150273970055SRussell King } 150373970055SRussell King break; 150473970055SRussell King 150573970055SRussell King case SFP_MOD_PROBE: 150673970055SRussell King if (event == SFP_E_REMOVE) { 150773970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_EMPTY, 0); 150873970055SRussell King } else if (event == SFP_E_TIMEOUT) { 15093bb35261SJon Nettleton int val = sfp_sm_mod_probe(sfp); 151073970055SRussell King 15113bb35261SJon Nettleton if (val == 0) 151273970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_PRESENT, 0); 15133bb35261SJon Nettleton else if (val > 0) 15143bb35261SJon Nettleton sfp_sm_ins_next(sfp, SFP_MOD_HPOWER, val); 15153bb35261SJon Nettleton else if (val != -EAGAIN) 151673970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_ERROR, 0); 15173bb35261SJon Nettleton else 15183bb35261SJon Nettleton sfp_sm_set_timer(sfp, T_PROBE_RETRY); 151973970055SRussell King } 152073970055SRussell King break; 152173970055SRussell King 15223bb35261SJon Nettleton case SFP_MOD_HPOWER: 15233bb35261SJon Nettleton if (event == SFP_E_TIMEOUT) { 15243bb35261SJon Nettleton sfp_sm_ins_next(sfp, SFP_MOD_PRESENT, 0); 15253bb35261SJon Nettleton break; 15263bb35261SJon Nettleton } 15273bb35261SJon Nettleton /* fallthrough */ 152873970055SRussell King case SFP_MOD_PRESENT: 152973970055SRussell King case SFP_MOD_ERROR: 153073970055SRussell King if (event == SFP_E_REMOVE) { 153173970055SRussell King sfp_sm_mod_remove(sfp); 153273970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_EMPTY, 0); 153373970055SRussell King } 153473970055SRussell King break; 153573970055SRussell King } 153673970055SRussell King 153773970055SRussell King /* This state machine tracks the netdev up/down state */ 153873970055SRussell King switch (sfp->sm_dev_state) { 153973970055SRussell King default: 154073970055SRussell King if (event == SFP_E_DEV_UP) 154173970055SRussell King sfp->sm_dev_state = SFP_DEV_UP; 154273970055SRussell King break; 154373970055SRussell King 154473970055SRussell King case SFP_DEV_UP: 154573970055SRussell King if (event == SFP_E_DEV_DOWN) { 154673970055SRussell King /* If the module has a PHY, avoid raising TX disable 154773970055SRussell King * as this resets the PHY. Otherwise, raise it to 154873970055SRussell King * turn the laser off. 154973970055SRussell King */ 155073970055SRussell King if (!sfp->mod_phy) 155173970055SRussell King sfp_module_tx_disable(sfp); 155273970055SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 155373970055SRussell King } 155473970055SRussell King break; 155573970055SRussell King } 155673970055SRussell King 155773970055SRussell King /* Some events are global */ 155873970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 155973970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 156073970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 156173970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 156273970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 156373970055SRussell King sfp_sm_link_down(sfp); 156473970055SRussell King if (sfp->mod_phy) 156573970055SRussell King sfp_sm_phy_detach(sfp); 156673970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 156773970055SRussell King mutex_unlock(&sfp->sm_mutex); 156873970055SRussell King return; 156973970055SRussell King } 157073970055SRussell King 157173970055SRussell King /* The main state machine */ 157273970055SRussell King switch (sfp->sm_state) { 157373970055SRussell King case SFP_S_DOWN: 157473970055SRussell King if (sfp->sm_mod_state == SFP_MOD_PRESENT && 157573970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 157673970055SRussell King sfp_sm_mod_init(sfp); 157773970055SRussell King break; 157873970055SRussell King 157973970055SRussell King case SFP_S_INIT: 158073970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) 158173970055SRussell King sfp_sm_fault(sfp, true); 158273970055SRussell King else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) 158373970055SRussell King sfp_sm_link_check_los(sfp); 158473970055SRussell King break; 158573970055SRussell King 158673970055SRussell King case SFP_S_WAIT_LOS: 158773970055SRussell King if (event == SFP_E_TX_FAULT) 158873970055SRussell King sfp_sm_fault(sfp, true); 1589710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 159073970055SRussell King sfp_sm_link_up(sfp); 159173970055SRussell King break; 159273970055SRussell King 159373970055SRussell King case SFP_S_LINK_UP: 159473970055SRussell King if (event == SFP_E_TX_FAULT) { 159573970055SRussell King sfp_sm_link_down(sfp); 159673970055SRussell King sfp_sm_fault(sfp, true); 1597710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 159873970055SRussell King sfp_sm_link_down(sfp); 159973970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 160073970055SRussell King } 160173970055SRussell King break; 160273970055SRussell King 160373970055SRussell King case SFP_S_TX_FAULT: 160473970055SRussell King if (event == SFP_E_TIMEOUT) { 160573970055SRussell King sfp_module_tx_fault_reset(sfp); 160673970055SRussell King sfp_sm_next(sfp, SFP_S_REINIT, T_INIT_JIFFIES); 160773970055SRussell King } 160873970055SRussell King break; 160973970055SRussell King 161073970055SRussell King case SFP_S_REINIT: 161173970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 161273970055SRussell King sfp_sm_fault(sfp, false); 161373970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 161473970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 161573970055SRussell King sfp_sm_link_check_los(sfp); 161673970055SRussell King } 161773970055SRussell King break; 161873970055SRussell King 161973970055SRussell King case SFP_S_TX_DISABLE: 162073970055SRussell King break; 162173970055SRussell King } 162273970055SRussell King 16234005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 16244005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 16254005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 16264005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 162773970055SRussell King 162873970055SRussell King mutex_unlock(&sfp->sm_mutex); 162973970055SRussell King } 163073970055SRussell King 1631b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 1632b5bfc21aSRussell King { 1633b5bfc21aSRussell King sfp->attached = true; 1634b5bfc21aSRussell King if (sfp->state & SFP_F_PRESENT) 1635b5bfc21aSRussell King sfp_sm_event(sfp, SFP_E_INSERT); 1636b5bfc21aSRussell King } 1637b5bfc21aSRussell King 1638b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 1639b5bfc21aSRussell King { 1640b5bfc21aSRussell King sfp->attached = false; 1641b5bfc21aSRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 1642b5bfc21aSRussell King } 1643b5bfc21aSRussell King 164473970055SRussell King static void sfp_start(struct sfp *sfp) 164573970055SRussell King { 164673970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 164773970055SRussell King } 164873970055SRussell King 164973970055SRussell King static void sfp_stop(struct sfp *sfp) 165073970055SRussell King { 165173970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 165273970055SRussell King } 165373970055SRussell King 165473970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 165573970055SRussell King { 165673970055SRussell King /* locking... and check module is present */ 165773970055SRussell King 1658ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 1659ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 166073970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 166173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 166273970055SRussell King } else { 166373970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 166473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 166573970055SRussell King } 166673970055SRussell King return 0; 166773970055SRussell King } 166873970055SRussell King 166973970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 167073970055SRussell King u8 *data) 167173970055SRussell King { 167273970055SRussell King unsigned int first, last, len; 167373970055SRussell King int ret; 167473970055SRussell King 167573970055SRussell King if (ee->len == 0) 167673970055SRussell King return -EINVAL; 167773970055SRussell King 167873970055SRussell King first = ee->offset; 167973970055SRussell King last = ee->offset + ee->len; 168073970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 168173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 168273970055SRussell King len -= first; 168373970055SRussell King 16842794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 168573970055SRussell King if (ret < 0) 168673970055SRussell King return ret; 168773970055SRussell King 168873970055SRussell King first += len; 168973970055SRussell King data += len; 169073970055SRussell King } 16912794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 169273970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 169373970055SRussell King len -= first; 169473970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 169573970055SRussell King 16962794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 169773970055SRussell King if (ret < 0) 169873970055SRussell King return ret; 169973970055SRussell King } 170073970055SRussell King return 0; 170173970055SRussell King } 170273970055SRussell King 170373970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 1704b5bfc21aSRussell King .attach = sfp_attach, 1705b5bfc21aSRussell King .detach = sfp_detach, 170673970055SRussell King .start = sfp_start, 170773970055SRussell King .stop = sfp_stop, 170873970055SRussell King .module_info = sfp_module_info, 170973970055SRussell King .module_eeprom = sfp_module_eeprom, 171073970055SRussell King }; 171173970055SRussell King 171273970055SRussell King static void sfp_timeout(struct work_struct *work) 171373970055SRussell King { 171473970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 171573970055SRussell King 171673970055SRussell King rtnl_lock(); 171773970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 171873970055SRussell King rtnl_unlock(); 171973970055SRussell King } 172073970055SRussell King 172173970055SRussell King static void sfp_check_state(struct sfp *sfp) 172273970055SRussell King { 172373970055SRussell King unsigned int state, i, changed; 172473970055SRussell King 17252158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 172673970055SRussell King state = sfp_get_state(sfp); 172773970055SRussell King changed = state ^ sfp->state; 172873970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 172973970055SRussell King 173073970055SRussell King for (i = 0; i < GPIO_MAX; i++) 173173970055SRussell King if (changed & BIT(i)) 173273970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 173373970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 173473970055SRussell King 173573970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 173673970055SRussell King sfp->state = state; 173773970055SRussell King 173873970055SRussell King rtnl_lock(); 173973970055SRussell King if (changed & SFP_F_PRESENT) 174073970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 174173970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 174273970055SRussell King 174373970055SRussell King if (changed & SFP_F_TX_FAULT) 174473970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 174573970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 174673970055SRussell King 174773970055SRussell King if (changed & SFP_F_LOS) 174873970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 174973970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 175073970055SRussell King rtnl_unlock(); 17512158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 175273970055SRussell King } 175373970055SRussell King 175473970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 175573970055SRussell King { 175673970055SRussell King struct sfp *sfp = data; 175773970055SRussell King 175873970055SRussell King sfp_check_state(sfp); 175973970055SRussell King 176073970055SRussell King return IRQ_HANDLED; 176173970055SRussell King } 176273970055SRussell King 176373970055SRussell King static void sfp_poll(struct work_struct *work) 176473970055SRussell King { 176573970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 176673970055SRussell King 176773970055SRussell King sfp_check_state(sfp); 176873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 176973970055SRussell King } 177073970055SRussell King 177173970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 177273970055SRussell King { 177373970055SRussell King struct sfp *sfp; 177473970055SRussell King 177573970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 177673970055SRussell King if (!sfp) 177773970055SRussell King return ERR_PTR(-ENOMEM); 177873970055SRussell King 177973970055SRussell King sfp->dev = dev; 178073970055SRussell King 178173970055SRussell King mutex_init(&sfp->sm_mutex); 17822158e856SRobert Hancock mutex_init(&sfp->st_mutex); 178373970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 178473970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 178573970055SRussell King 178673970055SRussell King return sfp; 178773970055SRussell King } 178873970055SRussell King 178973970055SRussell King static void sfp_cleanup(void *data) 179073970055SRussell King { 179173970055SRussell King struct sfp *sfp = data; 179273970055SRussell King 179373970055SRussell King cancel_delayed_work_sync(&sfp->poll); 179473970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 179573970055SRussell King if (sfp->i2c_mii) { 179673970055SRussell King mdiobus_unregister(sfp->i2c_mii); 179773970055SRussell King mdiobus_free(sfp->i2c_mii); 179873970055SRussell King } 179973970055SRussell King if (sfp->i2c) 180073970055SRussell King i2c_put_adapter(sfp->i2c); 180173970055SRussell King kfree(sfp); 180273970055SRussell King } 180373970055SRussell King 180473970055SRussell King static int sfp_probe(struct platform_device *pdev) 180573970055SRussell King { 1806259c8618SRussell King const struct sff_data *sff; 18077ce236faSRuslan Babayev struct i2c_adapter *i2c; 180873970055SRussell King struct sfp *sfp; 180973970055SRussell King bool poll = false; 1810257c2559SRobert Hancock int err, i; 181173970055SRussell King 181273970055SRussell King sfp = sfp_alloc(&pdev->dev); 181373970055SRussell King if (IS_ERR(sfp)) 181473970055SRussell King return PTR_ERR(sfp); 181573970055SRussell King 181673970055SRussell King platform_set_drvdata(pdev, sfp); 181773970055SRussell King 181873970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 181973970055SRussell King if (err < 0) 182073970055SRussell King return err; 182173970055SRussell King 1822259c8618SRussell King sff = sfp->type = &sfp_data; 1823259c8618SRussell King 182473970055SRussell King if (pdev->dev.of_node) { 182573970055SRussell King struct device_node *node = pdev->dev.of_node; 1826259c8618SRussell King const struct of_device_id *id; 182773970055SRussell King struct device_node *np; 182873970055SRussell King 1829259c8618SRussell King id = of_match_node(sfp_of_match, node); 1830259c8618SRussell King if (WARN_ON(!id)) 1831259c8618SRussell King return -EINVAL; 1832259c8618SRussell King 1833259c8618SRussell King sff = sfp->type = id->data; 1834259c8618SRussell King 183573970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 183666ede1f9SAntoine Tenart if (!np) { 183766ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 183866ede1f9SAntoine Tenart return -ENODEV; 183966ede1f9SAntoine Tenart } 184073970055SRussell King 184173970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 184273970055SRussell King of_node_put(np); 18437ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 18447ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 18457ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 18467ce236faSRuslan Babayev struct fwnode_reference_args args; 18477ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 18487ce236faSRuslan Babayev int ret; 18497ce236faSRuslan Babayev 18507ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 18511086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 18527ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 18537ce236faSRuslan Babayev return -ENODEV; 18547ce236faSRuslan Babayev } 18557ce236faSRuslan Babayev 18567ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 18577ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 18587ce236faSRuslan Babayev } else { 18597ce236faSRuslan Babayev return -EINVAL; 18607ce236faSRuslan Babayev } 18617ce236faSRuslan Babayev 186273970055SRussell King if (!i2c) 186373970055SRussell King return -EPROBE_DEFER; 186473970055SRussell King 186573970055SRussell King err = sfp_i2c_configure(sfp, i2c); 186673970055SRussell King if (err < 0) { 186773970055SRussell King i2c_put_adapter(i2c); 186873970055SRussell King return err; 186973970055SRussell King } 187073970055SRussell King 1871259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 1872259c8618SRussell King if (sff->gpios & BIT(i)) { 187373970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 187473970055SRussell King gpio_of_names[i], gpio_flags[i]); 187573970055SRussell King if (IS_ERR(sfp->gpio[i])) 187673970055SRussell King return PTR_ERR(sfp->gpio[i]); 187773970055SRussell King } 187873970055SRussell King 187973970055SRussell King sfp->get_state = sfp_gpio_get_state; 188073970055SRussell King sfp->set_state = sfp_gpio_set_state; 1881259c8618SRussell King 1882259c8618SRussell King /* Modules that have no detect signal are always present */ 1883259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 1884259c8618SRussell King sfp->get_state = sff_gpio_get_state; 188573970055SRussell King 18863bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 18873bb35261SJon Nettleton &sfp->max_power_mW); 18883bb35261SJon Nettleton if (!sfp->max_power_mW) 18893bb35261SJon Nettleton sfp->max_power_mW = 1000; 18903bb35261SJon Nettleton 18913bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 18923bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 18933bb35261SJon Nettleton 189473970055SRussell King /* Get the initial state, and always signal TX disable, 189573970055SRussell King * since the network interface will not be up. 189673970055SRussell King */ 189773970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 189873970055SRussell King 189973970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 190073970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 190173970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 190273970055SRussell King sfp_set_state(sfp, sfp->state); 190373970055SRussell King sfp_module_tx_disable(sfp); 190473970055SRussell King 190573970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 190673970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 190773970055SRussell King continue; 190873970055SRussell King 1909257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 1910257c2559SRobert Hancock if (!sfp->gpio_irq[i]) { 191173970055SRussell King poll = true; 191273970055SRussell King continue; 191373970055SRussell King } 191473970055SRussell King 1915257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 1916257c2559SRobert Hancock NULL, sfp_irq, 191773970055SRussell King IRQF_ONESHOT | 191873970055SRussell King IRQF_TRIGGER_RISING | 191973970055SRussell King IRQF_TRIGGER_FALLING, 192073970055SRussell King dev_name(sfp->dev), sfp); 1921257c2559SRobert Hancock if (err) { 1922257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 192373970055SRussell King poll = true; 192473970055SRussell King } 1925257c2559SRobert Hancock } 192673970055SRussell King 192773970055SRussell King if (poll) 192873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 192973970055SRussell King 1930a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 1931a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 1932a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 1933a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 1934a1f5d1f0SAntoine Tenart */ 1935a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 1936a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 1937a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 1938a1f5d1f0SAntoine Tenart 1939b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 1940b5bfc21aSRussell King if (!sfp->sfp_bus) 1941b5bfc21aSRussell King return -ENOMEM; 1942b5bfc21aSRussell King 194373970055SRussell King return 0; 194473970055SRussell King } 194573970055SRussell King 194673970055SRussell King static int sfp_remove(struct platform_device *pdev) 194773970055SRussell King { 194873970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 194973970055SRussell King 195073970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 195173970055SRussell King 195273970055SRussell King return 0; 195373970055SRussell King } 195473970055SRussell King 1955257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 1956257c2559SRobert Hancock { 1957257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 1958257c2559SRobert Hancock int i; 1959257c2559SRobert Hancock 1960257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 1961257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 1962257c2559SRobert Hancock continue; 1963257c2559SRobert Hancock 1964257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 1965257c2559SRobert Hancock } 1966257c2559SRobert Hancock 1967257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 1968257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 1969257c2559SRobert Hancock } 1970257c2559SRobert Hancock 197173970055SRussell King static struct platform_driver sfp_driver = { 197273970055SRussell King .probe = sfp_probe, 197373970055SRussell King .remove = sfp_remove, 1974257c2559SRobert Hancock .shutdown = sfp_shutdown, 197573970055SRussell King .driver = { 197673970055SRussell King .name = "sfp", 197773970055SRussell King .of_match_table = sfp_of_match, 197873970055SRussell King }, 197973970055SRussell King }; 198073970055SRussell King 198173970055SRussell King static int sfp_init(void) 198273970055SRussell King { 198373970055SRussell King poll_jiffies = msecs_to_jiffies(100); 198473970055SRussell King 198573970055SRussell King return platform_driver_register(&sfp_driver); 198673970055SRussell King } 198773970055SRussell King module_init(sfp_init); 198873970055SRussell King 198973970055SRussell King static void sfp_exit(void) 199073970055SRussell King { 199173970055SRussell King platform_driver_unregister(&sfp_driver); 199273970055SRussell King } 199373970055SRussell King module_exit(sfp_exit); 199473970055SRussell King 199573970055SRussell King MODULE_ALIAS("platform:sfp"); 199673970055SRussell King MODULE_AUTHOR("Russell King"); 199773970055SRussell King MODULE_LICENSE("GPL v2"); 1998