1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 21323061aSAndrew Lunn #include <linux/ctype.h> 373970055SRussell King #include <linux/delay.h> 454a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 51323061aSAndrew Lunn #include <linux/hwmon.h> 673970055SRussell King #include <linux/i2c.h> 773970055SRussell King #include <linux/interrupt.h> 873970055SRussell King #include <linux/jiffies.h> 973970055SRussell King #include <linux/module.h> 1073970055SRussell King #include <linux/mutex.h> 1173970055SRussell King #include <linux/of.h> 1273970055SRussell King #include <linux/phy.h> 1373970055SRussell King #include <linux/platform_device.h> 1473970055SRussell King #include <linux/rtnetlink.h> 1573970055SRussell King #include <linux/slab.h> 1673970055SRussell King #include <linux/workqueue.h> 1773970055SRussell King 1873970055SRussell King #include "mdio-i2c.h" 1973970055SRussell King #include "sfp.h" 2073970055SRussell King #include "swphy.h" 2173970055SRussell King 2273970055SRussell King enum { 2373970055SRussell King GPIO_MODDEF0, 2473970055SRussell King GPIO_LOS, 2573970055SRussell King GPIO_TX_FAULT, 2673970055SRussell King GPIO_TX_DISABLE, 2773970055SRussell King GPIO_RATE_SELECT, 2873970055SRussell King GPIO_MAX, 2973970055SRussell King 3073970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3173970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3273970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3373970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3473970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3573970055SRussell King 3673970055SRussell King SFP_E_INSERT = 0, 3773970055SRussell King SFP_E_REMOVE, 3873970055SRussell King SFP_E_DEV_DOWN, 3973970055SRussell King SFP_E_DEV_UP, 4073970055SRussell King SFP_E_TX_FAULT, 4173970055SRussell King SFP_E_TX_CLEAR, 4273970055SRussell King SFP_E_LOS_HIGH, 4373970055SRussell King SFP_E_LOS_LOW, 4473970055SRussell King SFP_E_TIMEOUT, 4573970055SRussell King 4673970055SRussell King SFP_MOD_EMPTY = 0, 4773970055SRussell King SFP_MOD_PROBE, 483bb35261SJon Nettleton SFP_MOD_HPOWER, 4973970055SRussell King SFP_MOD_PRESENT, 5073970055SRussell King SFP_MOD_ERROR, 5173970055SRussell King 5273970055SRussell King SFP_DEV_DOWN = 0, 5373970055SRussell King SFP_DEV_UP, 5473970055SRussell King 5573970055SRussell King SFP_S_DOWN = 0, 5673970055SRussell King SFP_S_INIT, 5773970055SRussell King SFP_S_WAIT_LOS, 5873970055SRussell King SFP_S_LINK_UP, 5973970055SRussell King SFP_S_TX_FAULT, 6073970055SRussell King SFP_S_REINIT, 6173970055SRussell King SFP_S_TX_DISABLE, 6273970055SRussell King }; 6373970055SRussell King 644005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 654005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 664005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 674005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 684005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 694005a7cbSAndrew Lunn [SFP_MOD_ERROR] = "error", 704005a7cbSAndrew Lunn }; 714005a7cbSAndrew Lunn 724005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 734005a7cbSAndrew Lunn { 744005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 754005a7cbSAndrew Lunn return "Unknown module state"; 764005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 774005a7cbSAndrew Lunn } 784005a7cbSAndrew Lunn 794005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 804005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 814005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 824005a7cbSAndrew Lunn }; 834005a7cbSAndrew Lunn 844005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 854005a7cbSAndrew Lunn { 864005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 874005a7cbSAndrew Lunn return "Unknown device state"; 884005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 894005a7cbSAndrew Lunn } 904005a7cbSAndrew Lunn 914005a7cbSAndrew Lunn static const char * const event_strings[] = { 924005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 934005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 944005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 954005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 964005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 974005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 984005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 994005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1004005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1014005a7cbSAndrew Lunn }; 1024005a7cbSAndrew Lunn 1034005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1044005a7cbSAndrew Lunn { 1054005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1064005a7cbSAndrew Lunn return "Unknown event"; 1074005a7cbSAndrew Lunn return event_strings[event]; 1084005a7cbSAndrew Lunn } 1094005a7cbSAndrew Lunn 1104005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1114005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 1124005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1134005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1144005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1154005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1164005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 1174005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_disable", 1184005a7cbSAndrew Lunn }; 1194005a7cbSAndrew Lunn 1204005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1214005a7cbSAndrew Lunn { 1224005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1234005a7cbSAndrew Lunn return "Unknown state"; 1244005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1254005a7cbSAndrew Lunn } 1264005a7cbSAndrew Lunn 12773970055SRussell King static const char *gpio_of_names[] = { 12825ee0793SBaruch Siach "mod-def0", 12973970055SRussell King "los", 13073970055SRussell King "tx-fault", 13173970055SRussell King "tx-disable", 13225ee0793SBaruch Siach "rate-select0", 13373970055SRussell King }; 13473970055SRussell King 13573970055SRussell King static const enum gpiod_flags gpio_flags[] = { 13673970055SRussell King GPIOD_IN, 13773970055SRussell King GPIOD_IN, 13873970055SRussell King GPIOD_IN, 13973970055SRussell King GPIOD_ASIS, 14073970055SRussell King GPIOD_ASIS, 14173970055SRussell King }; 14273970055SRussell King 14373970055SRussell King #define T_INIT_JIFFIES msecs_to_jiffies(300) 14473970055SRussell King #define T_RESET_US 10 14573970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 14673970055SRussell King 14773970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 14873970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 14973970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 15073970055SRussell King * 15173970055SRussell King * The SFP MSA specifies 300ms as t_init (the time taken for TX_FAULT to 15273970055SRussell King * be deasserted) but makes no mention of the earliest time before we can 15373970055SRussell King * access the I2C EEPROM. However, Avago modules require 300ms. 15473970055SRussell King */ 15573970055SRussell King #define T_PROBE_INIT msecs_to_jiffies(300) 1563bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 15773970055SRussell King #define T_PROBE_RETRY msecs_to_jiffies(100) 15873970055SRussell King 159516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 16073970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 16173970055SRussell King */ 16273970055SRussell King #define SFP_PHY_ADDR 22 16373970055SRussell King 164516b29edSFlorian Fainelli /* Give this long for the PHY to reset. */ 16573970055SRussell King #define T_PHY_RESET_MS 50 16673970055SRussell King 167259c8618SRussell King struct sff_data { 168259c8618SRussell King unsigned int gpios; 169259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 170259c8618SRussell King }; 171259c8618SRussell King 17273970055SRussell King struct sfp { 17373970055SRussell King struct device *dev; 17473970055SRussell King struct i2c_adapter *i2c; 17573970055SRussell King struct mii_bus *i2c_mii; 17673970055SRussell King struct sfp_bus *sfp_bus; 17773970055SRussell King struct phy_device *mod_phy; 178259c8618SRussell King const struct sff_data *type; 1793bb35261SJon Nettleton u32 max_power_mW; 18073970055SRussell King 18173970055SRussell King unsigned int (*get_state)(struct sfp *); 18273970055SRussell King void (*set_state)(struct sfp *, unsigned int); 18373970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 1843bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 18573970055SRussell King 18673970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 18773970055SRussell King 188b5bfc21aSRussell King bool attached; 18973970055SRussell King unsigned int state; 19073970055SRussell King struct delayed_work poll; 19173970055SRussell King struct delayed_work timeout; 19273970055SRussell King struct mutex sm_mutex; 19373970055SRussell King unsigned char sm_mod_state; 19473970055SRussell King unsigned char sm_dev_state; 19573970055SRussell King unsigned short sm_state; 19673970055SRussell King unsigned int sm_retries; 19773970055SRussell King 19873970055SRussell King struct sfp_eeprom_id id; 1991323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2001323061aSAndrew Lunn struct sfp_diag diag; 2011323061aSAndrew Lunn struct device *hwmon_dev; 2021323061aSAndrew Lunn char *hwmon_name; 2031323061aSAndrew Lunn #endif 2041323061aSAndrew Lunn 20573970055SRussell King }; 20673970055SRussell King 207259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 208259c8618SRussell King { 209259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFF && 210259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 211259c8618SRussell King } 212259c8618SRussell King 213259c8618SRussell King static const struct sff_data sff_data = { 214259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 215259c8618SRussell King .module_supported = sff_module_supported, 216259c8618SRussell King }; 217259c8618SRussell King 218259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 219259c8618SRussell King { 220259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFP && 221259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 222259c8618SRussell King } 223259c8618SRussell King 224259c8618SRussell King static const struct sff_data sfp_data = { 225259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 226259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 227259c8618SRussell King .module_supported = sfp_module_supported, 228259c8618SRussell King }; 229259c8618SRussell King 230259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 231259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 232259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 233259c8618SRussell King { }, 234259c8618SRussell King }; 235259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 236259c8618SRussell King 23773970055SRussell King static unsigned long poll_jiffies; 23873970055SRussell King 23973970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 24073970055SRussell King { 24173970055SRussell King unsigned int i, state, v; 24273970055SRussell King 24373970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 24473970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 24573970055SRussell King continue; 24673970055SRussell King 24773970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 24873970055SRussell King if (v) 24973970055SRussell King state |= BIT(i); 25073970055SRussell King } 25173970055SRussell King 25273970055SRussell King return state; 25373970055SRussell King } 25473970055SRussell King 255259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 256259c8618SRussell King { 257259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 258259c8618SRussell King } 259259c8618SRussell King 26073970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 26173970055SRussell King { 26273970055SRussell King if (state & SFP_F_PRESENT) { 26373970055SRussell King /* If the module is present, drive the signals */ 26473970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 26573970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 26673970055SRussell King state & SFP_F_TX_DISABLE); 26773970055SRussell King if (state & SFP_F_RATE_SELECT) 26873970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 26973970055SRussell King state & SFP_F_RATE_SELECT); 27073970055SRussell King } else { 27173970055SRussell King /* Otherwise, let them float to the pull-ups */ 27273970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 27373970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 27473970055SRussell King if (state & SFP_F_RATE_SELECT) 27573970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 27673970055SRussell King } 27773970055SRussell King } 27873970055SRussell King 2793bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 2803bb35261SJon Nettleton size_t len) 28173970055SRussell King { 28273970055SRussell King struct i2c_msg msgs[2]; 2833bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 28428e74a7cSRussell King size_t this_len; 28573970055SRussell King int ret; 28673970055SRussell King 28773970055SRussell King msgs[0].addr = bus_addr; 28873970055SRussell King msgs[0].flags = 0; 28973970055SRussell King msgs[0].len = 1; 29073970055SRussell King msgs[0].buf = &dev_addr; 29173970055SRussell King msgs[1].addr = bus_addr; 29273970055SRussell King msgs[1].flags = I2C_M_RD; 29373970055SRussell King msgs[1].len = len; 29473970055SRussell King msgs[1].buf = buf; 29573970055SRussell King 29628e74a7cSRussell King while (len) { 29728e74a7cSRussell King this_len = len; 29828e74a7cSRussell King if (this_len > 16) 29928e74a7cSRussell King this_len = 16; 30028e74a7cSRussell King 30128e74a7cSRussell King msgs[1].len = this_len; 30228e74a7cSRussell King 3033bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 30473970055SRussell King if (ret < 0) 30573970055SRussell King return ret; 30673970055SRussell King 30728e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 30828e74a7cSRussell King break; 30928e74a7cSRussell King 31028e74a7cSRussell King msgs[1].buf += this_len; 31128e74a7cSRussell King dev_addr += this_len; 31228e74a7cSRussell King len -= this_len; 31328e74a7cSRussell King } 31428e74a7cSRussell King 31528e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 31673970055SRussell King } 31773970055SRussell King 3183bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 31973970055SRussell King size_t len) 32073970055SRussell King { 3213bb35261SJon Nettleton struct i2c_msg msgs[1]; 3223bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3233bb35261SJon Nettleton int ret; 3243bb35261SJon Nettleton 3253bb35261SJon Nettleton msgs[0].addr = bus_addr; 3263bb35261SJon Nettleton msgs[0].flags = 0; 3273bb35261SJon Nettleton msgs[0].len = 1 + len; 3283bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3293bb35261SJon Nettleton if (!msgs[0].buf) 3303bb35261SJon Nettleton return -ENOMEM; 3313bb35261SJon Nettleton 3323bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3333bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3343bb35261SJon Nettleton 3353bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3363bb35261SJon Nettleton 3373bb35261SJon Nettleton kfree(msgs[0].buf); 3383bb35261SJon Nettleton 3393bb35261SJon Nettleton if (ret < 0) 3403bb35261SJon Nettleton return ret; 3413bb35261SJon Nettleton 3423bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 34373970055SRussell King } 34473970055SRussell King 34573970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 34673970055SRussell King { 34773970055SRussell King struct mii_bus *i2c_mii; 34873970055SRussell King int ret; 34973970055SRussell King 35073970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 35173970055SRussell King return -EINVAL; 35273970055SRussell King 35373970055SRussell King sfp->i2c = i2c; 35473970055SRussell King sfp->read = sfp_i2c_read; 3553bb35261SJon Nettleton sfp->write = sfp_i2c_write; 35673970055SRussell King 35773970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 35873970055SRussell King if (IS_ERR(i2c_mii)) 35973970055SRussell King return PTR_ERR(i2c_mii); 36073970055SRussell King 36173970055SRussell King i2c_mii->name = "SFP I2C Bus"; 36273970055SRussell King i2c_mii->phy_mask = ~0; 36373970055SRussell King 36473970055SRussell King ret = mdiobus_register(i2c_mii); 36573970055SRussell King if (ret < 0) { 36673970055SRussell King mdiobus_free(i2c_mii); 36773970055SRussell King return ret; 36873970055SRussell King } 36973970055SRussell King 37073970055SRussell King sfp->i2c_mii = i2c_mii; 37173970055SRussell King 37273970055SRussell King return 0; 37373970055SRussell King } 37473970055SRussell King 37573970055SRussell King /* Interface */ 37673970055SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 37773970055SRussell King { 37873970055SRussell King return sfp->get_state(sfp); 37973970055SRussell King } 38073970055SRussell King 38173970055SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 38273970055SRussell King { 38373970055SRussell King sfp->set_state(sfp, state); 38473970055SRussell King } 38573970055SRussell King 38673970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 38773970055SRussell King { 38873970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 38973970055SRussell King } 39073970055SRussell King 3913bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 3923bb35261SJon Nettleton { 3933bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 3943bb35261SJon Nettleton } 3953bb35261SJon Nettleton 39673970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 39773970055SRussell King { 39873970055SRussell King u8 *p, check; 39973970055SRussell King 40073970055SRussell King for (p = buf, check = 0; len; p++, len--) 40173970055SRussell King check += *p; 40273970055SRussell King 40373970055SRussell King return check; 40473970055SRussell King } 40573970055SRussell King 4061323061aSAndrew Lunn /* hwmon */ 4071323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 4081323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 4091323061aSAndrew Lunn enum hwmon_sensor_types type, 4101323061aSAndrew Lunn u32 attr, int channel) 4111323061aSAndrew Lunn { 4121323061aSAndrew Lunn const struct sfp *sfp = data; 4131323061aSAndrew Lunn 4141323061aSAndrew Lunn switch (type) { 4151323061aSAndrew Lunn case hwmon_temp: 4161323061aSAndrew Lunn switch (attr) { 4171323061aSAndrew Lunn case hwmon_temp_min_alarm: 4181323061aSAndrew Lunn case hwmon_temp_max_alarm: 4191323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 4201323061aSAndrew Lunn case hwmon_temp_crit_alarm: 4211323061aSAndrew Lunn case hwmon_temp_min: 4221323061aSAndrew Lunn case hwmon_temp_max: 4231323061aSAndrew Lunn case hwmon_temp_lcrit: 4241323061aSAndrew Lunn case hwmon_temp_crit: 425a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 426a33710bdSAndrew Lunn return 0; 427a33710bdSAndrew Lunn /* fall through */ 428a33710bdSAndrew Lunn case hwmon_temp_input: 4291323061aSAndrew Lunn return 0444; 4301323061aSAndrew Lunn default: 4311323061aSAndrew Lunn return 0; 4321323061aSAndrew Lunn } 4331323061aSAndrew Lunn case hwmon_in: 4341323061aSAndrew Lunn switch (attr) { 4351323061aSAndrew Lunn case hwmon_in_min_alarm: 4361323061aSAndrew Lunn case hwmon_in_max_alarm: 4371323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 4381323061aSAndrew Lunn case hwmon_in_crit_alarm: 4391323061aSAndrew Lunn case hwmon_in_min: 4401323061aSAndrew Lunn case hwmon_in_max: 4411323061aSAndrew Lunn case hwmon_in_lcrit: 4421323061aSAndrew Lunn case hwmon_in_crit: 443a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 444a33710bdSAndrew Lunn return 0; 445a33710bdSAndrew Lunn /* fall through */ 446a33710bdSAndrew Lunn case hwmon_in_input: 4471323061aSAndrew Lunn return 0444; 4481323061aSAndrew Lunn default: 4491323061aSAndrew Lunn return 0; 4501323061aSAndrew Lunn } 4511323061aSAndrew Lunn case hwmon_curr: 4521323061aSAndrew Lunn switch (attr) { 4531323061aSAndrew Lunn case hwmon_curr_min_alarm: 4541323061aSAndrew Lunn case hwmon_curr_max_alarm: 4551323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 4561323061aSAndrew Lunn case hwmon_curr_crit_alarm: 4571323061aSAndrew Lunn case hwmon_curr_min: 4581323061aSAndrew Lunn case hwmon_curr_max: 4591323061aSAndrew Lunn case hwmon_curr_lcrit: 4601323061aSAndrew Lunn case hwmon_curr_crit: 461a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 462a33710bdSAndrew Lunn return 0; 463a33710bdSAndrew Lunn /* fall through */ 464a33710bdSAndrew Lunn case hwmon_curr_input: 4651323061aSAndrew Lunn return 0444; 4661323061aSAndrew Lunn default: 4671323061aSAndrew Lunn return 0; 4681323061aSAndrew Lunn } 4691323061aSAndrew Lunn case hwmon_power: 4701323061aSAndrew Lunn /* External calibration of receive power requires 4711323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 4721323061aSAndrew Lunn * is not easy, so just skip it. If the module does 4731323061aSAndrew Lunn * not require external calibration, we can however 4741323061aSAndrew Lunn * show receiver power, since FP is then not needed. 4751323061aSAndrew Lunn */ 4761323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 4771323061aSAndrew Lunn channel == 1) 4781323061aSAndrew Lunn return 0; 4791323061aSAndrew Lunn switch (attr) { 4801323061aSAndrew Lunn case hwmon_power_min_alarm: 4811323061aSAndrew Lunn case hwmon_power_max_alarm: 4821323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 4831323061aSAndrew Lunn case hwmon_power_crit_alarm: 4841323061aSAndrew Lunn case hwmon_power_min: 4851323061aSAndrew Lunn case hwmon_power_max: 4861323061aSAndrew Lunn case hwmon_power_lcrit: 4871323061aSAndrew Lunn case hwmon_power_crit: 488a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 489a33710bdSAndrew Lunn return 0; 490a33710bdSAndrew Lunn /* fall through */ 491a33710bdSAndrew Lunn case hwmon_power_input: 4921323061aSAndrew Lunn return 0444; 4931323061aSAndrew Lunn default: 4941323061aSAndrew Lunn return 0; 4951323061aSAndrew Lunn } 4961323061aSAndrew Lunn default: 4971323061aSAndrew Lunn return 0; 4981323061aSAndrew Lunn } 4991323061aSAndrew Lunn } 5001323061aSAndrew Lunn 5011323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 5021323061aSAndrew Lunn { 5031323061aSAndrew Lunn __be16 val; 5041323061aSAndrew Lunn int err; 5051323061aSAndrew Lunn 5061323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 5071323061aSAndrew Lunn if (err < 0) 5081323061aSAndrew Lunn return err; 5091323061aSAndrew Lunn 5101323061aSAndrew Lunn *value = be16_to_cpu(val); 5111323061aSAndrew Lunn 5121323061aSAndrew Lunn return 0; 5131323061aSAndrew Lunn } 5141323061aSAndrew Lunn 5151323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 5161323061aSAndrew Lunn { 5171323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 100); 5181323061aSAndrew Lunn } 5191323061aSAndrew Lunn 5201323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 5211323061aSAndrew Lunn long *value) 5221323061aSAndrew Lunn { 5231323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 5241323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 5251323061aSAndrew Lunn } 5261323061aSAndrew Lunn 5271323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 5281323061aSAndrew Lunn { 5291323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 5301323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 5311323061aSAndrew Lunn 5321323061aSAndrew Lunn if (*value >= 0x8000) 5331323061aSAndrew Lunn *value -= 0x10000; 5341323061aSAndrew Lunn 5351323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 5361323061aSAndrew Lunn } 5371323061aSAndrew Lunn 5381323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 5391323061aSAndrew Lunn { 5401323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 5411323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 5421323061aSAndrew Lunn 5431323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5441323061aSAndrew Lunn } 5451323061aSAndrew Lunn 5461323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 5471323061aSAndrew Lunn { 5481323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 5491323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 5501323061aSAndrew Lunn 5511323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 5521323061aSAndrew Lunn } 5531323061aSAndrew Lunn 5541323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 5551323061aSAndrew Lunn { 5561323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 5571323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 5581323061aSAndrew Lunn 5591323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5601323061aSAndrew Lunn } 5611323061aSAndrew Lunn 5621323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 5631323061aSAndrew Lunn { 5641323061aSAndrew Lunn int err; 5651323061aSAndrew Lunn 5661323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5671323061aSAndrew Lunn if (err < 0) 5681323061aSAndrew Lunn return err; 5691323061aSAndrew Lunn 5701323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 5711323061aSAndrew Lunn 5721323061aSAndrew Lunn return 0; 5731323061aSAndrew Lunn } 5741323061aSAndrew Lunn 5751323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 5761323061aSAndrew Lunn { 5771323061aSAndrew Lunn int err; 5781323061aSAndrew Lunn 5791323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5801323061aSAndrew Lunn if (err < 0) 5811323061aSAndrew Lunn return err; 5821323061aSAndrew Lunn 5831323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 5841323061aSAndrew Lunn 5851323061aSAndrew Lunn return 0; 5861323061aSAndrew Lunn } 5871323061aSAndrew Lunn 5881323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 5891323061aSAndrew Lunn { 5901323061aSAndrew Lunn int err; 5911323061aSAndrew Lunn 5921323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5931323061aSAndrew Lunn if (err < 0) 5941323061aSAndrew Lunn return err; 5951323061aSAndrew Lunn 5961323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 5971323061aSAndrew Lunn 5981323061aSAndrew Lunn return 0; 5991323061aSAndrew Lunn } 6001323061aSAndrew Lunn 6011323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 6021323061aSAndrew Lunn { 6031323061aSAndrew Lunn int err; 6041323061aSAndrew Lunn 6051323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6061323061aSAndrew Lunn if (err < 0) 6071323061aSAndrew Lunn return err; 6081323061aSAndrew Lunn 6091323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 6101323061aSAndrew Lunn 6111323061aSAndrew Lunn return 0; 6121323061aSAndrew Lunn } 6131323061aSAndrew Lunn 6141323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 6151323061aSAndrew Lunn { 6161323061aSAndrew Lunn int err; 6171323061aSAndrew Lunn 6181323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6191323061aSAndrew Lunn if (err < 0) 6201323061aSAndrew Lunn return err; 6211323061aSAndrew Lunn 6221323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 6231323061aSAndrew Lunn 6241323061aSAndrew Lunn return 0; 6251323061aSAndrew Lunn } 6261323061aSAndrew Lunn 6271323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 6281323061aSAndrew Lunn { 6291323061aSAndrew Lunn u8 status; 6301323061aSAndrew Lunn int err; 6311323061aSAndrew Lunn 6321323061aSAndrew Lunn switch (attr) { 6331323061aSAndrew Lunn case hwmon_temp_input: 6341323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 6351323061aSAndrew Lunn 6361323061aSAndrew Lunn case hwmon_temp_lcrit: 6371323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 6381323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6391323061aSAndrew Lunn return 0; 6401323061aSAndrew Lunn 6411323061aSAndrew Lunn case hwmon_temp_min: 6421323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 6431323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6441323061aSAndrew Lunn return 0; 6451323061aSAndrew Lunn case hwmon_temp_max: 6461323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 6471323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6481323061aSAndrew Lunn return 0; 6491323061aSAndrew Lunn 6501323061aSAndrew Lunn case hwmon_temp_crit: 6511323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 6521323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6531323061aSAndrew Lunn return 0; 6541323061aSAndrew Lunn 6551323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 6561323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6571323061aSAndrew Lunn if (err < 0) 6581323061aSAndrew Lunn return err; 6591323061aSAndrew Lunn 6601323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 6611323061aSAndrew Lunn return 0; 6621323061aSAndrew Lunn 6631323061aSAndrew Lunn case hwmon_temp_min_alarm: 6641323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6651323061aSAndrew Lunn if (err < 0) 6661323061aSAndrew Lunn return err; 6671323061aSAndrew Lunn 6681323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 6691323061aSAndrew Lunn return 0; 6701323061aSAndrew Lunn 6711323061aSAndrew Lunn case hwmon_temp_max_alarm: 6721323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6731323061aSAndrew Lunn if (err < 0) 6741323061aSAndrew Lunn return err; 6751323061aSAndrew Lunn 6761323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 6771323061aSAndrew Lunn return 0; 6781323061aSAndrew Lunn 6791323061aSAndrew Lunn case hwmon_temp_crit_alarm: 6801323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6811323061aSAndrew Lunn if (err < 0) 6821323061aSAndrew Lunn return err; 6831323061aSAndrew Lunn 6841323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 6851323061aSAndrew Lunn return 0; 6861323061aSAndrew Lunn default: 6871323061aSAndrew Lunn return -EOPNOTSUPP; 6881323061aSAndrew Lunn } 6891323061aSAndrew Lunn 6901323061aSAndrew Lunn return -EOPNOTSUPP; 6911323061aSAndrew Lunn } 6921323061aSAndrew Lunn 6931323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 6941323061aSAndrew Lunn { 6951323061aSAndrew Lunn u8 status; 6961323061aSAndrew Lunn int err; 6971323061aSAndrew Lunn 6981323061aSAndrew Lunn switch (attr) { 6991323061aSAndrew Lunn case hwmon_in_input: 7001323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 7011323061aSAndrew Lunn 7021323061aSAndrew Lunn case hwmon_in_lcrit: 7031323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 7041323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7051323061aSAndrew Lunn return 0; 7061323061aSAndrew Lunn 7071323061aSAndrew Lunn case hwmon_in_min: 7081323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 7091323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7101323061aSAndrew Lunn return 0; 7111323061aSAndrew Lunn 7121323061aSAndrew Lunn case hwmon_in_max: 7131323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 7141323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7151323061aSAndrew Lunn return 0; 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn case hwmon_in_crit: 7181323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 7191323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7201323061aSAndrew Lunn return 0; 7211323061aSAndrew Lunn 7221323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7231323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7241323061aSAndrew Lunn if (err < 0) 7251323061aSAndrew Lunn return err; 7261323061aSAndrew Lunn 7271323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 7281323061aSAndrew Lunn return 0; 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn case hwmon_in_min_alarm: 7311323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7321323061aSAndrew Lunn if (err < 0) 7331323061aSAndrew Lunn return err; 7341323061aSAndrew Lunn 7351323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 7361323061aSAndrew Lunn return 0; 7371323061aSAndrew Lunn 7381323061aSAndrew Lunn case hwmon_in_max_alarm: 7391323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7401323061aSAndrew Lunn if (err < 0) 7411323061aSAndrew Lunn return err; 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 7441323061aSAndrew Lunn return 0; 7451323061aSAndrew Lunn 7461323061aSAndrew Lunn case hwmon_in_crit_alarm: 7471323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7481323061aSAndrew Lunn if (err < 0) 7491323061aSAndrew Lunn return err; 7501323061aSAndrew Lunn 7511323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 7521323061aSAndrew Lunn return 0; 7531323061aSAndrew Lunn default: 7541323061aSAndrew Lunn return -EOPNOTSUPP; 7551323061aSAndrew Lunn } 7561323061aSAndrew Lunn 7571323061aSAndrew Lunn return -EOPNOTSUPP; 7581323061aSAndrew Lunn } 7591323061aSAndrew Lunn 7601323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 7611323061aSAndrew Lunn { 7621323061aSAndrew Lunn u8 status; 7631323061aSAndrew Lunn int err; 7641323061aSAndrew Lunn 7651323061aSAndrew Lunn switch (attr) { 7661323061aSAndrew Lunn case hwmon_curr_input: 7671323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 7681323061aSAndrew Lunn 7691323061aSAndrew Lunn case hwmon_curr_lcrit: 7701323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 7711323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7721323061aSAndrew Lunn return 0; 7731323061aSAndrew Lunn 7741323061aSAndrew Lunn case hwmon_curr_min: 7751323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 7761323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7771323061aSAndrew Lunn return 0; 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn case hwmon_curr_max: 7801323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 7811323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7821323061aSAndrew Lunn return 0; 7831323061aSAndrew Lunn 7841323061aSAndrew Lunn case hwmon_curr_crit: 7851323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 7861323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7871323061aSAndrew Lunn return 0; 7881323061aSAndrew Lunn 7891323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 7901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7911323061aSAndrew Lunn if (err < 0) 7921323061aSAndrew Lunn return err; 7931323061aSAndrew Lunn 7941323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 7951323061aSAndrew Lunn return 0; 7961323061aSAndrew Lunn 7971323061aSAndrew Lunn case hwmon_curr_min_alarm: 7981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7991323061aSAndrew Lunn if (err < 0) 8001323061aSAndrew Lunn return err; 8011323061aSAndrew Lunn 8021323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 8031323061aSAndrew Lunn return 0; 8041323061aSAndrew Lunn 8051323061aSAndrew Lunn case hwmon_curr_max_alarm: 8061323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8071323061aSAndrew Lunn if (err < 0) 8081323061aSAndrew Lunn return err; 8091323061aSAndrew Lunn 8101323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 8111323061aSAndrew Lunn return 0; 8121323061aSAndrew Lunn 8131323061aSAndrew Lunn case hwmon_curr_crit_alarm: 8141323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8151323061aSAndrew Lunn if (err < 0) 8161323061aSAndrew Lunn return err; 8171323061aSAndrew Lunn 8181323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 8191323061aSAndrew Lunn return 0; 8201323061aSAndrew Lunn default: 8211323061aSAndrew Lunn return -EOPNOTSUPP; 8221323061aSAndrew Lunn } 8231323061aSAndrew Lunn 8241323061aSAndrew Lunn return -EOPNOTSUPP; 8251323061aSAndrew Lunn } 8261323061aSAndrew Lunn 8271323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 8281323061aSAndrew Lunn { 8291323061aSAndrew Lunn u8 status; 8301323061aSAndrew Lunn int err; 8311323061aSAndrew Lunn 8321323061aSAndrew Lunn switch (attr) { 8331323061aSAndrew Lunn case hwmon_power_input: 8341323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 8351323061aSAndrew Lunn 8361323061aSAndrew Lunn case hwmon_power_lcrit: 8371323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 8381323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8391323061aSAndrew Lunn return 0; 8401323061aSAndrew Lunn 8411323061aSAndrew Lunn case hwmon_power_min: 8421323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 8431323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8441323061aSAndrew Lunn return 0; 8451323061aSAndrew Lunn 8461323061aSAndrew Lunn case hwmon_power_max: 8471323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 8481323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8491323061aSAndrew Lunn return 0; 8501323061aSAndrew Lunn 8511323061aSAndrew Lunn case hwmon_power_crit: 8521323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 8531323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8541323061aSAndrew Lunn return 0; 8551323061aSAndrew Lunn 8561323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 8571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8581323061aSAndrew Lunn if (err < 0) 8591323061aSAndrew Lunn return err; 8601323061aSAndrew Lunn 8611323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 8621323061aSAndrew Lunn return 0; 8631323061aSAndrew Lunn 8641323061aSAndrew Lunn case hwmon_power_min_alarm: 8651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8661323061aSAndrew Lunn if (err < 0) 8671323061aSAndrew Lunn return err; 8681323061aSAndrew Lunn 8691323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 8701323061aSAndrew Lunn return 0; 8711323061aSAndrew Lunn 8721323061aSAndrew Lunn case hwmon_power_max_alarm: 8731323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8741323061aSAndrew Lunn if (err < 0) 8751323061aSAndrew Lunn return err; 8761323061aSAndrew Lunn 8771323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 8781323061aSAndrew Lunn return 0; 8791323061aSAndrew Lunn 8801323061aSAndrew Lunn case hwmon_power_crit_alarm: 8811323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8821323061aSAndrew Lunn if (err < 0) 8831323061aSAndrew Lunn return err; 8841323061aSAndrew Lunn 8851323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 8861323061aSAndrew Lunn return 0; 8871323061aSAndrew Lunn default: 8881323061aSAndrew Lunn return -EOPNOTSUPP; 8891323061aSAndrew Lunn } 8901323061aSAndrew Lunn 8911323061aSAndrew Lunn return -EOPNOTSUPP; 8921323061aSAndrew Lunn } 8931323061aSAndrew Lunn 8941323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 8951323061aSAndrew Lunn { 8961323061aSAndrew Lunn u8 status; 8971323061aSAndrew Lunn int err; 8981323061aSAndrew Lunn 8991323061aSAndrew Lunn switch (attr) { 9001323061aSAndrew Lunn case hwmon_power_input: 9011323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 9021323061aSAndrew Lunn 9031323061aSAndrew Lunn case hwmon_power_lcrit: 9041323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 9051323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9061323061aSAndrew Lunn return 0; 9071323061aSAndrew Lunn 9081323061aSAndrew Lunn case hwmon_power_min: 9091323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 9101323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9111323061aSAndrew Lunn return 0; 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn case hwmon_power_max: 9141323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 9151323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9161323061aSAndrew Lunn return 0; 9171323061aSAndrew Lunn 9181323061aSAndrew Lunn case hwmon_power_crit: 9191323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 9201323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9211323061aSAndrew Lunn return 0; 9221323061aSAndrew Lunn 9231323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9241323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9251323061aSAndrew Lunn if (err < 0) 9261323061aSAndrew Lunn return err; 9271323061aSAndrew Lunn 9281323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 9291323061aSAndrew Lunn return 0; 9301323061aSAndrew Lunn 9311323061aSAndrew Lunn case hwmon_power_min_alarm: 9321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9331323061aSAndrew Lunn if (err < 0) 9341323061aSAndrew Lunn return err; 9351323061aSAndrew Lunn 9361323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 9371323061aSAndrew Lunn return 0; 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn case hwmon_power_max_alarm: 9401323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9411323061aSAndrew Lunn if (err < 0) 9421323061aSAndrew Lunn return err; 9431323061aSAndrew Lunn 9441323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 9451323061aSAndrew Lunn return 0; 9461323061aSAndrew Lunn 9471323061aSAndrew Lunn case hwmon_power_crit_alarm: 9481323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9491323061aSAndrew Lunn if (err < 0) 9501323061aSAndrew Lunn return err; 9511323061aSAndrew Lunn 9521323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 9531323061aSAndrew Lunn return 0; 9541323061aSAndrew Lunn default: 9551323061aSAndrew Lunn return -EOPNOTSUPP; 9561323061aSAndrew Lunn } 9571323061aSAndrew Lunn 9581323061aSAndrew Lunn return -EOPNOTSUPP; 9591323061aSAndrew Lunn } 9601323061aSAndrew Lunn 9611323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 9621323061aSAndrew Lunn u32 attr, int channel, long *value) 9631323061aSAndrew Lunn { 9641323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 9651323061aSAndrew Lunn 9661323061aSAndrew Lunn switch (type) { 9671323061aSAndrew Lunn case hwmon_temp: 9681323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 9691323061aSAndrew Lunn case hwmon_in: 9701323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 9711323061aSAndrew Lunn case hwmon_curr: 9721323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 9731323061aSAndrew Lunn case hwmon_power: 9741323061aSAndrew Lunn switch (channel) { 9751323061aSAndrew Lunn case 0: 9761323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 9771323061aSAndrew Lunn case 1: 9781323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 9791323061aSAndrew Lunn default: 9801323061aSAndrew Lunn return -EOPNOTSUPP; 9811323061aSAndrew Lunn } 9821323061aSAndrew Lunn default: 9831323061aSAndrew Lunn return -EOPNOTSUPP; 9841323061aSAndrew Lunn } 9851323061aSAndrew Lunn } 9861323061aSAndrew Lunn 9871323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 9881323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 9891323061aSAndrew Lunn .read = sfp_hwmon_read, 9901323061aSAndrew Lunn }; 9911323061aSAndrew Lunn 9921323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 9931323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 9941323061aSAndrew Lunn 0, 9951323061aSAndrew Lunn }; 9961323061aSAndrew Lunn 9971323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 9981323061aSAndrew Lunn .type = hwmon_chip, 9991323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 10001323061aSAndrew Lunn }; 10011323061aSAndrew Lunn 10021323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 10031323061aSAndrew Lunn HWMON_T_INPUT | 10041323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 10051323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 10061323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 10071323061aSAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM, 10081323061aSAndrew Lunn 0, 10091323061aSAndrew Lunn }; 10101323061aSAndrew Lunn 10111323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 10121323061aSAndrew Lunn .type = hwmon_temp, 10131323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 10141323061aSAndrew Lunn }; 10151323061aSAndrew Lunn 10161323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 10171323061aSAndrew Lunn HWMON_I_INPUT | 10181323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 10191323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 10201323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 10211323061aSAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM, 10221323061aSAndrew Lunn 0, 10231323061aSAndrew Lunn }; 10241323061aSAndrew Lunn 10251323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 10261323061aSAndrew Lunn .type = hwmon_in, 10271323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 10281323061aSAndrew Lunn }; 10291323061aSAndrew Lunn 10301323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 10311323061aSAndrew Lunn HWMON_C_INPUT | 10321323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 10331323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 10341323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 10351323061aSAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM, 10361323061aSAndrew Lunn 0, 10371323061aSAndrew Lunn }; 10381323061aSAndrew Lunn 10391323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 10401323061aSAndrew Lunn .type = hwmon_curr, 10411323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 10421323061aSAndrew Lunn }; 10431323061aSAndrew Lunn 10441323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 10451323061aSAndrew Lunn /* Transmit power */ 10461323061aSAndrew Lunn HWMON_P_INPUT | 10471323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 10481323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 10491323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 10501323061aSAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM, 10511323061aSAndrew Lunn /* Receive power */ 10521323061aSAndrew Lunn HWMON_P_INPUT | 10531323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 10541323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 10551323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 10561323061aSAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM, 10571323061aSAndrew Lunn 0, 10581323061aSAndrew Lunn }; 10591323061aSAndrew Lunn 10601323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 10611323061aSAndrew Lunn .type = hwmon_power, 10621323061aSAndrew Lunn .config = sfp_hwmon_power_config, 10631323061aSAndrew Lunn }; 10641323061aSAndrew Lunn 10651323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 10661323061aSAndrew Lunn &sfp_hwmon_chip, 10671323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 10681323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 10691323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 10701323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 10711323061aSAndrew Lunn NULL, 10721323061aSAndrew Lunn }; 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 10751323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 10761323061aSAndrew Lunn .info = sfp_hwmon_info, 10771323061aSAndrew Lunn }; 10781323061aSAndrew Lunn 10791323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 10801323061aSAndrew Lunn { 10811323061aSAndrew Lunn int err, i; 10821323061aSAndrew Lunn 10831323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 10841323061aSAndrew Lunn return 0; 10851323061aSAndrew Lunn 10861323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 10871323061aSAndrew Lunn return 0; 10881323061aSAndrew Lunn 10891323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 10901323061aSAndrew Lunn /* This driver in general does not support address 10911323061aSAndrew Lunn * change. 10921323061aSAndrew Lunn */ 10931323061aSAndrew Lunn return 0; 10941323061aSAndrew Lunn 10951323061aSAndrew Lunn err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 10961323061aSAndrew Lunn if (err < 0) 10971323061aSAndrew Lunn return err; 10981323061aSAndrew Lunn 10991323061aSAndrew Lunn sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 11001323061aSAndrew Lunn if (!sfp->hwmon_name) 11011323061aSAndrew Lunn return -ENODEV; 11021323061aSAndrew Lunn 11031323061aSAndrew Lunn for (i = 0; sfp->hwmon_name[i]; i++) 11041323061aSAndrew Lunn if (hwmon_is_bad_char(sfp->hwmon_name[i])) 11051323061aSAndrew Lunn sfp->hwmon_name[i] = '_'; 11061323061aSAndrew Lunn 11071323061aSAndrew Lunn sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 11081323061aSAndrew Lunn sfp->hwmon_name, sfp, 11091323061aSAndrew Lunn &sfp_hwmon_chip_info, 11101323061aSAndrew Lunn NULL); 11111323061aSAndrew Lunn 11121323061aSAndrew Lunn return PTR_ERR_OR_ZERO(sfp->hwmon_dev); 11131323061aSAndrew Lunn } 11141323061aSAndrew Lunn 11151323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 11161323061aSAndrew Lunn { 11173e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 11181323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 11193e322474SAndrew Lunn sfp->hwmon_dev = NULL; 11201323061aSAndrew Lunn kfree(sfp->hwmon_name); 11211323061aSAndrew Lunn } 11223e322474SAndrew Lunn } 11231323061aSAndrew Lunn #else 11241323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 11251323061aSAndrew Lunn { 11261323061aSAndrew Lunn return 0; 11271323061aSAndrew Lunn } 11281323061aSAndrew Lunn 11291323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 11301323061aSAndrew Lunn { 11311323061aSAndrew Lunn } 11321323061aSAndrew Lunn #endif 11331323061aSAndrew Lunn 113473970055SRussell King /* Helpers */ 113573970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 113673970055SRussell King { 113773970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 113873970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 113973970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 114073970055SRussell King sfp_set_state(sfp, sfp->state); 114173970055SRussell King } 114273970055SRussell King 114373970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 114473970055SRussell King { 114573970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 114673970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 114773970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 114873970055SRussell King sfp_set_state(sfp, sfp->state); 114973970055SRussell King } 115073970055SRussell King 115173970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 115273970055SRussell King { 115373970055SRussell King unsigned int state = sfp->state; 115473970055SRussell King 115573970055SRussell King if (state & SFP_F_TX_DISABLE) 115673970055SRussell King return; 115773970055SRussell King 115873970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 115973970055SRussell King 116073970055SRussell King udelay(T_RESET_US); 116173970055SRussell King 116273970055SRussell King sfp_set_state(sfp, state); 116373970055SRussell King } 116473970055SRussell King 116573970055SRussell King /* SFP state machine */ 116673970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 116773970055SRussell King { 116873970055SRussell King if (timeout) 116973970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 117073970055SRussell King timeout); 117173970055SRussell King else 117273970055SRussell King cancel_delayed_work(&sfp->timeout); 117373970055SRussell King } 117473970055SRussell King 117573970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 117673970055SRussell King unsigned int timeout) 117773970055SRussell King { 117873970055SRussell King sfp->sm_state = state; 117973970055SRussell King sfp_sm_set_timer(sfp, timeout); 118073970055SRussell King } 118173970055SRussell King 1182516b29edSFlorian Fainelli static void sfp_sm_ins_next(struct sfp *sfp, unsigned int state, 1183516b29edSFlorian Fainelli unsigned int timeout) 118473970055SRussell King { 118573970055SRussell King sfp->sm_mod_state = state; 118673970055SRussell King sfp_sm_set_timer(sfp, timeout); 118773970055SRussell King } 118873970055SRussell King 118973970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 119073970055SRussell King { 119173970055SRussell King phy_stop(sfp->mod_phy); 119273970055SRussell King sfp_remove_phy(sfp->sfp_bus); 119373970055SRussell King phy_device_remove(sfp->mod_phy); 119473970055SRussell King phy_device_free(sfp->mod_phy); 119573970055SRussell King sfp->mod_phy = NULL; 119673970055SRussell King } 119773970055SRussell King 119873970055SRussell King static void sfp_sm_probe_phy(struct sfp *sfp) 119973970055SRussell King { 120073970055SRussell King struct phy_device *phy; 120173970055SRussell King int err; 120273970055SRussell King 120373970055SRussell King msleep(T_PHY_RESET_MS); 120473970055SRussell King 120573970055SRussell King phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); 120620b56ed9SRussell King if (phy == ERR_PTR(-ENODEV)) { 120720b56ed9SRussell King dev_info(sfp->dev, "no PHY detected\n"); 120873970055SRussell King return; 120973970055SRussell King } 121020b56ed9SRussell King if (IS_ERR(phy)) { 121120b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 121273970055SRussell King return; 121373970055SRussell King } 121473970055SRussell King 121573970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 121673970055SRussell King if (err) { 121773970055SRussell King phy_device_remove(phy); 121873970055SRussell King phy_device_free(phy); 121973970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 122073970055SRussell King return; 122173970055SRussell King } 122273970055SRussell King 122373970055SRussell King sfp->mod_phy = phy; 122473970055SRussell King phy_start(phy); 122573970055SRussell King } 122673970055SRussell King 122773970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 122873970055SRussell King { 122973970055SRussell King sfp_link_up(sfp->sfp_bus); 123073970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 123173970055SRussell King } 123273970055SRussell King 123373970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 123473970055SRussell King { 123573970055SRussell King sfp_link_down(sfp->sfp_bus); 123673970055SRussell King } 123773970055SRussell King 123873970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 123973970055SRussell King { 124073970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 124173970055SRussell King 1242710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1243710dfbb0SRussell King * are set, we assume that no LOS signal is available. 124473970055SRussell King */ 1245acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 124673970055SRussell King los ^= SFP_F_LOS; 1247710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1248710dfbb0SRussell King los = 0; 124973970055SRussell King 125073970055SRussell King if (los) 125173970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 125273970055SRussell King else 125373970055SRussell King sfp_sm_link_up(sfp); 125473970055SRussell King } 125573970055SRussell King 1256710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1257710dfbb0SRussell King { 1258710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1259710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1260710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1261710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1262710dfbb0SRussell King } 1263710dfbb0SRussell King 1264710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1265710dfbb0SRussell King { 1266710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1267710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1268710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1269710dfbb0SRussell King event == SFP_E_LOS_LOW); 1270710dfbb0SRussell King } 1271710dfbb0SRussell King 127273970055SRussell King static void sfp_sm_fault(struct sfp *sfp, bool warn) 127373970055SRussell King { 127473970055SRussell King if (sfp->sm_retries && !--sfp->sm_retries) { 1275516b29edSFlorian Fainelli dev_err(sfp->dev, 1276516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 127773970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 127873970055SRussell King } else { 127973970055SRussell King if (warn) 128073970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 128173970055SRussell King 128273970055SRussell King sfp_sm_next(sfp, SFP_S_TX_FAULT, T_FAULT_RECOVER); 128373970055SRussell King } 128473970055SRussell King } 128573970055SRussell King 128673970055SRussell King static void sfp_sm_mod_init(struct sfp *sfp) 128773970055SRussell King { 128873970055SRussell King sfp_module_tx_enable(sfp); 128973970055SRussell King 129073970055SRussell King /* Wait t_init before indicating that the link is up, provided the 129173970055SRussell King * current state indicates no TX_FAULT. If TX_FAULT clears before 129273970055SRussell King * this time, that's fine too. 129373970055SRussell King */ 129473970055SRussell King sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); 129573970055SRussell King sfp->sm_retries = 5; 129673970055SRussell King 129773970055SRussell King /* Setting the serdes link mode is guesswork: there's no 129873970055SRussell King * field in the EEPROM which indicates what mode should 129973970055SRussell King * be used. 130073970055SRussell King * 130173970055SRussell King * If it's a gigabit-only fiber module, it probably does 130273970055SRussell King * not have a PHY, so switch to 802.3z negotiation mode. 130373970055SRussell King * Otherwise, switch to SGMII mode (which is required to 130473970055SRussell King * support non-gigabit speeds) and probe for a PHY. 130573970055SRussell King */ 130673970055SRussell King if (sfp->id.base.e1000_base_t || 130773970055SRussell King sfp->id.base.e100_base_lx || 130873970055SRussell King sfp->id.base.e100_base_fx) 130973970055SRussell King sfp_sm_probe_phy(sfp); 131073970055SRussell King } 131173970055SRussell King 13123bb35261SJon Nettleton static int sfp_sm_mod_hpower(struct sfp *sfp) 13133bb35261SJon Nettleton { 13143bb35261SJon Nettleton u32 power; 13153bb35261SJon Nettleton u8 val; 13163bb35261SJon Nettleton int err; 13173bb35261SJon Nettleton 13183bb35261SJon Nettleton power = 1000; 13193bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 13203bb35261SJon Nettleton power = 1500; 13213bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 13223bb35261SJon Nettleton power = 2000; 13233bb35261SJon Nettleton 13243bb35261SJon Nettleton if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE && 13253bb35261SJon Nettleton (sfp->id.ext.diagmon & (SFP_DIAGMON_DDM | SFP_DIAGMON_ADDRMODE)) != 13263bb35261SJon Nettleton SFP_DIAGMON_DDM) { 13273bb35261SJon Nettleton /* The module appears not to implement bus address 0xa2, 13283bb35261SJon Nettleton * or requires an address change sequence, so assume that 13293bb35261SJon Nettleton * the module powers up in the indicated power mode. 13303bb35261SJon Nettleton */ 13313bb35261SJon Nettleton if (power > sfp->max_power_mW) { 13323bb35261SJon Nettleton dev_err(sfp->dev, 13333bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 13343bb35261SJon Nettleton power / 1000, (power / 100) % 10); 13353bb35261SJon Nettleton return -EINVAL; 13363bb35261SJon Nettleton } 13373bb35261SJon Nettleton return 0; 13383bb35261SJon Nettleton } 13393bb35261SJon Nettleton 13403bb35261SJon Nettleton if (power > sfp->max_power_mW) { 13413bb35261SJon Nettleton dev_warn(sfp->dev, 13423bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 13433bb35261SJon Nettleton power / 1000, (power / 100) % 10); 13443bb35261SJon Nettleton return 0; 13453bb35261SJon Nettleton } 13463bb35261SJon Nettleton 13473bb35261SJon Nettleton if (power <= 1000) 13483bb35261SJon Nettleton return 0; 13493bb35261SJon Nettleton 13503bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 13513bb35261SJon Nettleton if (err != sizeof(val)) { 13523bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 13533bb35261SJon Nettleton err = -EAGAIN; 13543bb35261SJon Nettleton goto err; 13553bb35261SJon Nettleton } 13563bb35261SJon Nettleton 13573bb35261SJon Nettleton val |= BIT(0); 13583bb35261SJon Nettleton 13593bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 13603bb35261SJon Nettleton if (err != sizeof(val)) { 13613bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 13623bb35261SJon Nettleton err = -EAGAIN; 13633bb35261SJon Nettleton goto err; 13643bb35261SJon Nettleton } 13653bb35261SJon Nettleton 13663bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 13673bb35261SJon Nettleton power / 1000, (power / 100) % 10); 13683bb35261SJon Nettleton return T_HPOWER_LEVEL; 13693bb35261SJon Nettleton 13703bb35261SJon Nettleton err: 13713bb35261SJon Nettleton return err; 13723bb35261SJon Nettleton } 13733bb35261SJon Nettleton 137473970055SRussell King static int sfp_sm_mod_probe(struct sfp *sfp) 137573970055SRussell King { 137673970055SRussell King /* SFP module inserted - read I2C data */ 137773970055SRussell King struct sfp_eeprom_id id; 1378981f1f80SRussell King bool cotsworks; 137973970055SRussell King u8 check; 13803bb35261SJon Nettleton int ret; 138173970055SRussell King 13823bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 13833bb35261SJon Nettleton if (ret < 0) { 13843bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 138573970055SRussell King return -EAGAIN; 138673970055SRussell King } 138773970055SRussell King 13883bb35261SJon Nettleton if (ret != sizeof(id)) { 13893bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 139073970055SRussell King return -EAGAIN; 139173970055SRussell King } 139273970055SRussell King 1393981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1394981f1f80SRussell King * do the final programming with the final module part number, 1395981f1f80SRussell King * serial number and date code. 1396981f1f80SRussell King */ 1397981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1398981f1f80SRussell King 139973970055SRussell King /* Validate the checksum over the base structure */ 140073970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 140173970055SRussell King if (check != id.base.cc_base) { 1402981f1f80SRussell King if (cotsworks) { 1403981f1f80SRussell King dev_warn(sfp->dev, 1404981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1405981f1f80SRussell King check, id.base.cc_base); 1406981f1f80SRussell King } else { 140773970055SRussell King dev_err(sfp->dev, 1408981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1409981f1f80SRussell King check, id.base.cc_base); 141073970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1411981f1f80SRussell King 16, 1, &id, sizeof(id), true); 141273970055SRussell King return -EINVAL; 141373970055SRussell King } 1414981f1f80SRussell King } 141573970055SRussell King 141673970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 141773970055SRussell King if (check != id.ext.cc_ext) { 1418981f1f80SRussell King if (cotsworks) { 1419981f1f80SRussell King dev_warn(sfp->dev, 1420981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1421981f1f80SRussell King check, id.ext.cc_ext); 1422981f1f80SRussell King } else { 142373970055SRussell King dev_err(sfp->dev, 1424981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1425981f1f80SRussell King check, id.ext.cc_ext); 1426981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1427981f1f80SRussell King 16, 1, &id, sizeof(id), true); 142873970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 142973970055SRussell King } 1430981f1f80SRussell King } 143173970055SRussell King 143273970055SRussell King sfp->id = id; 143373970055SRussell King 1434a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1435a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1436a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1437a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1438a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1439a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 144073970055SRussell King 1441259c8618SRussell King /* Check whether we support this module */ 1442259c8618SRussell King if (!sfp->type->module_supported(&sfp->id)) { 1443259c8618SRussell King dev_err(sfp->dev, 1444259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 144573970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 144673970055SRussell King return -EINVAL; 144773970055SRussell King } 144873970055SRussell King 1449ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1450ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1451ec7681bdSRussell King dev_warn(sfp->dev, 1452ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1453ec7681bdSRussell King 14541323061aSAndrew Lunn ret = sfp_hwmon_insert(sfp); 14551323061aSAndrew Lunn if (ret < 0) 14561323061aSAndrew Lunn return ret; 14571323061aSAndrew Lunn 14583bb35261SJon Nettleton ret = sfp_module_insert(sfp->sfp_bus, &sfp->id); 14593bb35261SJon Nettleton if (ret < 0) 14603bb35261SJon Nettleton return ret; 14613bb35261SJon Nettleton 14623bb35261SJon Nettleton return sfp_sm_mod_hpower(sfp); 146373970055SRussell King } 146473970055SRussell King 146573970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 146673970055SRussell King { 146773970055SRussell King sfp_module_remove(sfp->sfp_bus); 146873970055SRussell King 14691323061aSAndrew Lunn sfp_hwmon_remove(sfp); 14701323061aSAndrew Lunn 147173970055SRussell King if (sfp->mod_phy) 147273970055SRussell King sfp_sm_phy_detach(sfp); 147373970055SRussell King 147473970055SRussell King sfp_module_tx_disable(sfp); 147573970055SRussell King 147673970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 147773970055SRussell King 147873970055SRussell King dev_info(sfp->dev, "module removed\n"); 147973970055SRussell King } 148073970055SRussell King 148173970055SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 148273970055SRussell King { 148373970055SRussell King mutex_lock(&sfp->sm_mutex); 148473970055SRussell King 14854005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 14864005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 14874005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 14884005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state), 14894005a7cbSAndrew Lunn event_to_str(event)); 149073970055SRussell King 149173970055SRussell King /* This state machine tracks the insert/remove state of 149273970055SRussell King * the module, and handles probing the on-board EEPROM. 149373970055SRussell King */ 149473970055SRussell King switch (sfp->sm_mod_state) { 149573970055SRussell King default: 1496b5bfc21aSRussell King if (event == SFP_E_INSERT && sfp->attached) { 149773970055SRussell King sfp_module_tx_disable(sfp); 149873970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_PROBE, T_PROBE_INIT); 149973970055SRussell King } 150073970055SRussell King break; 150173970055SRussell King 150273970055SRussell King case SFP_MOD_PROBE: 150373970055SRussell King if (event == SFP_E_REMOVE) { 150473970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_EMPTY, 0); 150573970055SRussell King } else if (event == SFP_E_TIMEOUT) { 15063bb35261SJon Nettleton int val = sfp_sm_mod_probe(sfp); 150773970055SRussell King 15083bb35261SJon Nettleton if (val == 0) 150973970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_PRESENT, 0); 15103bb35261SJon Nettleton else if (val > 0) 15113bb35261SJon Nettleton sfp_sm_ins_next(sfp, SFP_MOD_HPOWER, val); 15123bb35261SJon Nettleton else if (val != -EAGAIN) 151373970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_ERROR, 0); 15143bb35261SJon Nettleton else 15153bb35261SJon Nettleton sfp_sm_set_timer(sfp, T_PROBE_RETRY); 151673970055SRussell King } 151773970055SRussell King break; 151873970055SRussell King 15193bb35261SJon Nettleton case SFP_MOD_HPOWER: 15203bb35261SJon Nettleton if (event == SFP_E_TIMEOUT) { 15213bb35261SJon Nettleton sfp_sm_ins_next(sfp, SFP_MOD_PRESENT, 0); 15223bb35261SJon Nettleton break; 15233bb35261SJon Nettleton } 15243bb35261SJon Nettleton /* fallthrough */ 152573970055SRussell King case SFP_MOD_PRESENT: 152673970055SRussell King case SFP_MOD_ERROR: 152773970055SRussell King if (event == SFP_E_REMOVE) { 152873970055SRussell King sfp_sm_mod_remove(sfp); 152973970055SRussell King sfp_sm_ins_next(sfp, SFP_MOD_EMPTY, 0); 153073970055SRussell King } 153173970055SRussell King break; 153273970055SRussell King } 153373970055SRussell King 153473970055SRussell King /* This state machine tracks the netdev up/down state */ 153573970055SRussell King switch (sfp->sm_dev_state) { 153673970055SRussell King default: 153773970055SRussell King if (event == SFP_E_DEV_UP) 153873970055SRussell King sfp->sm_dev_state = SFP_DEV_UP; 153973970055SRussell King break; 154073970055SRussell King 154173970055SRussell King case SFP_DEV_UP: 154273970055SRussell King if (event == SFP_E_DEV_DOWN) { 154373970055SRussell King /* If the module has a PHY, avoid raising TX disable 154473970055SRussell King * as this resets the PHY. Otherwise, raise it to 154573970055SRussell King * turn the laser off. 154673970055SRussell King */ 154773970055SRussell King if (!sfp->mod_phy) 154873970055SRussell King sfp_module_tx_disable(sfp); 154973970055SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 155073970055SRussell King } 155173970055SRussell King break; 155273970055SRussell King } 155373970055SRussell King 155473970055SRussell King /* Some events are global */ 155573970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 155673970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 155773970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 155873970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 155973970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 156073970055SRussell King sfp_sm_link_down(sfp); 156173970055SRussell King if (sfp->mod_phy) 156273970055SRussell King sfp_sm_phy_detach(sfp); 156373970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 156473970055SRussell King mutex_unlock(&sfp->sm_mutex); 156573970055SRussell King return; 156673970055SRussell King } 156773970055SRussell King 156873970055SRussell King /* The main state machine */ 156973970055SRussell King switch (sfp->sm_state) { 157073970055SRussell King case SFP_S_DOWN: 157173970055SRussell King if (sfp->sm_mod_state == SFP_MOD_PRESENT && 157273970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 157373970055SRussell King sfp_sm_mod_init(sfp); 157473970055SRussell King break; 157573970055SRussell King 157673970055SRussell King case SFP_S_INIT: 157773970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) 157873970055SRussell King sfp_sm_fault(sfp, true); 157973970055SRussell King else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) 158073970055SRussell King sfp_sm_link_check_los(sfp); 158173970055SRussell King break; 158273970055SRussell King 158373970055SRussell King case SFP_S_WAIT_LOS: 158473970055SRussell King if (event == SFP_E_TX_FAULT) 158573970055SRussell King sfp_sm_fault(sfp, true); 1586710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 158773970055SRussell King sfp_sm_link_up(sfp); 158873970055SRussell King break; 158973970055SRussell King 159073970055SRussell King case SFP_S_LINK_UP: 159173970055SRussell King if (event == SFP_E_TX_FAULT) { 159273970055SRussell King sfp_sm_link_down(sfp); 159373970055SRussell King sfp_sm_fault(sfp, true); 1594710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 159573970055SRussell King sfp_sm_link_down(sfp); 159673970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 159773970055SRussell King } 159873970055SRussell King break; 159973970055SRussell King 160073970055SRussell King case SFP_S_TX_FAULT: 160173970055SRussell King if (event == SFP_E_TIMEOUT) { 160273970055SRussell King sfp_module_tx_fault_reset(sfp); 160373970055SRussell King sfp_sm_next(sfp, SFP_S_REINIT, T_INIT_JIFFIES); 160473970055SRussell King } 160573970055SRussell King break; 160673970055SRussell King 160773970055SRussell King case SFP_S_REINIT: 160873970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 160973970055SRussell King sfp_sm_fault(sfp, false); 161073970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 161173970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 161273970055SRussell King sfp_sm_link_check_los(sfp); 161373970055SRussell King } 161473970055SRussell King break; 161573970055SRussell King 161673970055SRussell King case SFP_S_TX_DISABLE: 161773970055SRussell King break; 161873970055SRussell King } 161973970055SRussell King 16204005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 16214005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 16224005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 16234005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 162473970055SRussell King 162573970055SRussell King mutex_unlock(&sfp->sm_mutex); 162673970055SRussell King } 162773970055SRussell King 1628b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 1629b5bfc21aSRussell King { 1630b5bfc21aSRussell King sfp->attached = true; 1631b5bfc21aSRussell King if (sfp->state & SFP_F_PRESENT) 1632b5bfc21aSRussell King sfp_sm_event(sfp, SFP_E_INSERT); 1633b5bfc21aSRussell King } 1634b5bfc21aSRussell King 1635b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 1636b5bfc21aSRussell King { 1637b5bfc21aSRussell King sfp->attached = false; 1638b5bfc21aSRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 1639b5bfc21aSRussell King } 1640b5bfc21aSRussell King 164173970055SRussell King static void sfp_start(struct sfp *sfp) 164273970055SRussell King { 164373970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 164473970055SRussell King } 164573970055SRussell King 164673970055SRussell King static void sfp_stop(struct sfp *sfp) 164773970055SRussell King { 164873970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 164973970055SRussell King } 165073970055SRussell King 165173970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 165273970055SRussell King { 165373970055SRussell King /* locking... and check module is present */ 165473970055SRussell King 1655ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 1656ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 165773970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 165873970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 165973970055SRussell King } else { 166073970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 166173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 166273970055SRussell King } 166373970055SRussell King return 0; 166473970055SRussell King } 166573970055SRussell King 166673970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 166773970055SRussell King u8 *data) 166873970055SRussell King { 166973970055SRussell King unsigned int first, last, len; 167073970055SRussell King int ret; 167173970055SRussell King 167273970055SRussell King if (ee->len == 0) 167373970055SRussell King return -EINVAL; 167473970055SRussell King 167573970055SRussell King first = ee->offset; 167673970055SRussell King last = ee->offset + ee->len; 167773970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 167873970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 167973970055SRussell King len -= first; 168073970055SRussell King 16812794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 168273970055SRussell King if (ret < 0) 168373970055SRussell King return ret; 168473970055SRussell King 168573970055SRussell King first += len; 168673970055SRussell King data += len; 168773970055SRussell King } 16882794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 168973970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 169073970055SRussell King len -= first; 169173970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 169273970055SRussell King 16932794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 169473970055SRussell King if (ret < 0) 169573970055SRussell King return ret; 169673970055SRussell King } 169773970055SRussell King return 0; 169873970055SRussell King } 169973970055SRussell King 170073970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 1701b5bfc21aSRussell King .attach = sfp_attach, 1702b5bfc21aSRussell King .detach = sfp_detach, 170373970055SRussell King .start = sfp_start, 170473970055SRussell King .stop = sfp_stop, 170573970055SRussell King .module_info = sfp_module_info, 170673970055SRussell King .module_eeprom = sfp_module_eeprom, 170773970055SRussell King }; 170873970055SRussell King 170973970055SRussell King static void sfp_timeout(struct work_struct *work) 171073970055SRussell King { 171173970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 171273970055SRussell King 171373970055SRussell King rtnl_lock(); 171473970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 171573970055SRussell King rtnl_unlock(); 171673970055SRussell King } 171773970055SRussell King 171873970055SRussell King static void sfp_check_state(struct sfp *sfp) 171973970055SRussell King { 172073970055SRussell King unsigned int state, i, changed; 172173970055SRussell King 172273970055SRussell King state = sfp_get_state(sfp); 172373970055SRussell King changed = state ^ sfp->state; 172473970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 172573970055SRussell King 172673970055SRussell King for (i = 0; i < GPIO_MAX; i++) 172773970055SRussell King if (changed & BIT(i)) 172873970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 172973970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 173073970055SRussell King 173173970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 173273970055SRussell King sfp->state = state; 173373970055SRussell King 173473970055SRussell King rtnl_lock(); 173573970055SRussell King if (changed & SFP_F_PRESENT) 173673970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 173773970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 173873970055SRussell King 173973970055SRussell King if (changed & SFP_F_TX_FAULT) 174073970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 174173970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 174273970055SRussell King 174373970055SRussell King if (changed & SFP_F_LOS) 174473970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 174573970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 174673970055SRussell King rtnl_unlock(); 174773970055SRussell King } 174873970055SRussell King 174973970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 175073970055SRussell King { 175173970055SRussell King struct sfp *sfp = data; 175273970055SRussell King 175373970055SRussell King sfp_check_state(sfp); 175473970055SRussell King 175573970055SRussell King return IRQ_HANDLED; 175673970055SRussell King } 175773970055SRussell King 175873970055SRussell King static void sfp_poll(struct work_struct *work) 175973970055SRussell King { 176073970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 176173970055SRussell King 176273970055SRussell King sfp_check_state(sfp); 176373970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 176473970055SRussell King } 176573970055SRussell King 176673970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 176773970055SRussell King { 176873970055SRussell King struct sfp *sfp; 176973970055SRussell King 177073970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 177173970055SRussell King if (!sfp) 177273970055SRussell King return ERR_PTR(-ENOMEM); 177373970055SRussell King 177473970055SRussell King sfp->dev = dev; 177573970055SRussell King 177673970055SRussell King mutex_init(&sfp->sm_mutex); 177773970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 177873970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 177973970055SRussell King 178073970055SRussell King return sfp; 178173970055SRussell King } 178273970055SRussell King 178373970055SRussell King static void sfp_cleanup(void *data) 178473970055SRussell King { 178573970055SRussell King struct sfp *sfp = data; 178673970055SRussell King 178773970055SRussell King cancel_delayed_work_sync(&sfp->poll); 178873970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 178973970055SRussell King if (sfp->i2c_mii) { 179073970055SRussell King mdiobus_unregister(sfp->i2c_mii); 179173970055SRussell King mdiobus_free(sfp->i2c_mii); 179273970055SRussell King } 179373970055SRussell King if (sfp->i2c) 179473970055SRussell King i2c_put_adapter(sfp->i2c); 179573970055SRussell King kfree(sfp); 179673970055SRussell King } 179773970055SRussell King 179873970055SRussell King static int sfp_probe(struct platform_device *pdev) 179973970055SRussell King { 1800259c8618SRussell King const struct sff_data *sff; 180173970055SRussell King struct sfp *sfp; 180273970055SRussell King bool poll = false; 180373970055SRussell King int irq, err, i; 180473970055SRussell King 180573970055SRussell King sfp = sfp_alloc(&pdev->dev); 180673970055SRussell King if (IS_ERR(sfp)) 180773970055SRussell King return PTR_ERR(sfp); 180873970055SRussell King 180973970055SRussell King platform_set_drvdata(pdev, sfp); 181073970055SRussell King 181173970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 181273970055SRussell King if (err < 0) 181373970055SRussell King return err; 181473970055SRussell King 1815259c8618SRussell King sff = sfp->type = &sfp_data; 1816259c8618SRussell King 181773970055SRussell King if (pdev->dev.of_node) { 181873970055SRussell King struct device_node *node = pdev->dev.of_node; 1819259c8618SRussell King const struct of_device_id *id; 182066ede1f9SAntoine Tenart struct i2c_adapter *i2c; 182173970055SRussell King struct device_node *np; 182273970055SRussell King 1823259c8618SRussell King id = of_match_node(sfp_of_match, node); 1824259c8618SRussell King if (WARN_ON(!id)) 1825259c8618SRussell King return -EINVAL; 1826259c8618SRussell King 1827259c8618SRussell King sff = sfp->type = id->data; 1828259c8618SRussell King 182973970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 183066ede1f9SAntoine Tenart if (!np) { 183166ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 183266ede1f9SAntoine Tenart return -ENODEV; 183366ede1f9SAntoine Tenart } 183473970055SRussell King 183573970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 183673970055SRussell King of_node_put(np); 183773970055SRussell King if (!i2c) 183873970055SRussell King return -EPROBE_DEFER; 183973970055SRussell King 184073970055SRussell King err = sfp_i2c_configure(sfp, i2c); 184173970055SRussell King if (err < 0) { 184273970055SRussell King i2c_put_adapter(i2c); 184373970055SRussell King return err; 184473970055SRussell King } 184573970055SRussell King } 184673970055SRussell King 1847259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 1848259c8618SRussell King if (sff->gpios & BIT(i)) { 184973970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 185073970055SRussell King gpio_of_names[i], gpio_flags[i]); 185173970055SRussell King if (IS_ERR(sfp->gpio[i])) 185273970055SRussell King return PTR_ERR(sfp->gpio[i]); 185373970055SRussell King } 185473970055SRussell King 185573970055SRussell King sfp->get_state = sfp_gpio_get_state; 185673970055SRussell King sfp->set_state = sfp_gpio_set_state; 1857259c8618SRussell King 1858259c8618SRussell King /* Modules that have no detect signal are always present */ 1859259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 1860259c8618SRussell King sfp->get_state = sff_gpio_get_state; 186173970055SRussell King 18623bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 18633bb35261SJon Nettleton &sfp->max_power_mW); 18643bb35261SJon Nettleton if (!sfp->max_power_mW) 18653bb35261SJon Nettleton sfp->max_power_mW = 1000; 18663bb35261SJon Nettleton 18673bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 18683bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 18693bb35261SJon Nettleton 187073970055SRussell King /* Get the initial state, and always signal TX disable, 187173970055SRussell King * since the network interface will not be up. 187273970055SRussell King */ 187373970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 187473970055SRussell King 187573970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 187673970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 187773970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 187873970055SRussell King sfp_set_state(sfp, sfp->state); 187973970055SRussell King sfp_module_tx_disable(sfp); 188073970055SRussell King 188173970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 188273970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 188373970055SRussell King continue; 188473970055SRussell King 188573970055SRussell King irq = gpiod_to_irq(sfp->gpio[i]); 188673970055SRussell King if (!irq) { 188773970055SRussell King poll = true; 188873970055SRussell King continue; 188973970055SRussell King } 189073970055SRussell King 189173970055SRussell King err = devm_request_threaded_irq(sfp->dev, irq, NULL, sfp_irq, 189273970055SRussell King IRQF_ONESHOT | 189373970055SRussell King IRQF_TRIGGER_RISING | 189473970055SRussell King IRQF_TRIGGER_FALLING, 189573970055SRussell King dev_name(sfp->dev), sfp); 189673970055SRussell King if (err) 189773970055SRussell King poll = true; 189873970055SRussell King } 189973970055SRussell King 190073970055SRussell King if (poll) 190173970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 190273970055SRussell King 1903a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 1904a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 1905a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 1906a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 1907a1f5d1f0SAntoine Tenart */ 1908a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 1909a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 1910a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 1911a1f5d1f0SAntoine Tenart 1912b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 1913b5bfc21aSRussell King if (!sfp->sfp_bus) 1914b5bfc21aSRussell King return -ENOMEM; 1915b5bfc21aSRussell King 191673970055SRussell King return 0; 191773970055SRussell King } 191873970055SRussell King 191973970055SRussell King static int sfp_remove(struct platform_device *pdev) 192073970055SRussell King { 192173970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 192273970055SRussell King 192373970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 192473970055SRussell King 192573970055SRussell King return 0; 192673970055SRussell King } 192773970055SRussell King 192873970055SRussell King static struct platform_driver sfp_driver = { 192973970055SRussell King .probe = sfp_probe, 193073970055SRussell King .remove = sfp_remove, 193173970055SRussell King .driver = { 193273970055SRussell King .name = "sfp", 193373970055SRussell King .of_match_table = sfp_of_match, 193473970055SRussell King }, 193573970055SRussell King }; 193673970055SRussell King 193773970055SRussell King static int sfp_init(void) 193873970055SRussell King { 193973970055SRussell King poll_jiffies = msecs_to_jiffies(100); 194073970055SRussell King 194173970055SRussell King return platform_driver_register(&sfp_driver); 194273970055SRussell King } 194373970055SRussell King module_init(sfp_init); 194473970055SRussell King 194573970055SRussell King static void sfp_exit(void) 194673970055SRussell King { 194773970055SRussell King platform_driver_unregister(&sfp_driver); 194873970055SRussell King } 194973970055SRussell King module_exit(sfp_exit); 195073970055SRussell King 195173970055SRussell King MODULE_ALIAS("platform:sfp"); 195273970055SRussell King MODULE_AUTHOR("Russell King"); 195373970055SRussell King MODULE_LICENSE("GPL v2"); 1954