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, 57eefa6f1fSRussell King SFP_S_WAIT, 5873970055SRussell King SFP_S_INIT, 59d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6073970055SRussell King SFP_S_WAIT_LOS, 6173970055SRussell King SFP_S_LINK_UP, 6273970055SRussell King SFP_S_TX_FAULT, 6373970055SRussell King SFP_S_REINIT, 6473970055SRussell King SFP_S_TX_DISABLE, 6573970055SRussell King }; 6673970055SRussell King 674005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 684005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 694005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 704005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 714005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 724005a7cbSAndrew Lunn [SFP_MOD_ERROR] = "error", 734005a7cbSAndrew Lunn }; 744005a7cbSAndrew Lunn 754005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 764005a7cbSAndrew Lunn { 774005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 784005a7cbSAndrew Lunn return "Unknown module state"; 794005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 804005a7cbSAndrew Lunn } 814005a7cbSAndrew Lunn 824005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 834005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 844005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 854005a7cbSAndrew Lunn }; 864005a7cbSAndrew Lunn 874005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 884005a7cbSAndrew Lunn { 894005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 904005a7cbSAndrew Lunn return "Unknown device state"; 914005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 924005a7cbSAndrew Lunn } 934005a7cbSAndrew Lunn 944005a7cbSAndrew Lunn static const char * const event_strings[] = { 954005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 964005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 974005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 984005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 994005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1004005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1014005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1024005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1034005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1044005a7cbSAndrew Lunn }; 1054005a7cbSAndrew Lunn 1064005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1074005a7cbSAndrew Lunn { 1084005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1094005a7cbSAndrew Lunn return "Unknown event"; 1104005a7cbSAndrew Lunn return event_strings[event]; 1114005a7cbSAndrew Lunn } 1124005a7cbSAndrew Lunn 1134005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1144005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 115eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1164005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 117d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1184005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1194005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1204005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1214005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 1224005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_disable", 1234005a7cbSAndrew Lunn }; 1244005a7cbSAndrew Lunn 1254005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1264005a7cbSAndrew Lunn { 1274005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1284005a7cbSAndrew Lunn return "Unknown state"; 1294005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1304005a7cbSAndrew Lunn } 1314005a7cbSAndrew Lunn 13273970055SRussell King static const char *gpio_of_names[] = { 13325ee0793SBaruch Siach "mod-def0", 13473970055SRussell King "los", 13573970055SRussell King "tx-fault", 13673970055SRussell King "tx-disable", 13725ee0793SBaruch Siach "rate-select0", 13873970055SRussell King }; 13973970055SRussell King 14073970055SRussell King static const enum gpiod_flags gpio_flags[] = { 14173970055SRussell King GPIOD_IN, 14273970055SRussell King GPIOD_IN, 14373970055SRussell King GPIOD_IN, 14473970055SRussell King GPIOD_ASIS, 14573970055SRussell King GPIOD_ASIS, 14673970055SRussell King }; 14773970055SRussell King 148eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 14973970055SRussell King #define T_INIT_JIFFIES msecs_to_jiffies(300) 15073970055SRussell King #define T_RESET_US 10 15173970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 15273970055SRussell King 15373970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 15473970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 15573970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 15673970055SRussell King * 157d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 158d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 15973970055SRussell King */ 160d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 1613bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 16273970055SRussell King #define T_PROBE_RETRY msecs_to_jiffies(100) 16373970055SRussell King 164516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 16573970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 16673970055SRussell King */ 16773970055SRussell King #define SFP_PHY_ADDR 22 16873970055SRussell King 169259c8618SRussell King struct sff_data { 170259c8618SRussell King unsigned int gpios; 171259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 172259c8618SRussell King }; 173259c8618SRussell King 17473970055SRussell King struct sfp { 17573970055SRussell King struct device *dev; 17673970055SRussell King struct i2c_adapter *i2c; 17773970055SRussell King struct mii_bus *i2c_mii; 17873970055SRussell King struct sfp_bus *sfp_bus; 17973970055SRussell King struct phy_device *mod_phy; 180259c8618SRussell King const struct sff_data *type; 1813bb35261SJon Nettleton u32 max_power_mW; 18273970055SRussell King 18373970055SRussell King unsigned int (*get_state)(struct sfp *); 18473970055SRussell King void (*set_state)(struct sfp *, unsigned int); 18573970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 1863bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 18773970055SRussell King 18873970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 189257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 19073970055SRussell King 191b5bfc21aSRussell King bool attached; 1922158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 19373970055SRussell King unsigned int state; 19473970055SRussell King struct delayed_work poll; 19573970055SRussell King struct delayed_work timeout; 1962158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 19773970055SRussell King unsigned char sm_mod_state; 19873970055SRussell King unsigned char sm_dev_state; 19973970055SRussell King unsigned short sm_state; 20073970055SRussell King unsigned int sm_retries; 20173970055SRussell King 20273970055SRussell King struct sfp_eeprom_id id; 203ed32abb1SRussell King unsigned int module_power_mW; 204ed32abb1SRussell King 2051323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2061323061aSAndrew Lunn struct sfp_diag diag; 2071323061aSAndrew Lunn struct device *hwmon_dev; 2081323061aSAndrew Lunn char *hwmon_name; 2091323061aSAndrew Lunn #endif 2101323061aSAndrew Lunn 21173970055SRussell King }; 21273970055SRussell King 213259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 214259c8618SRussell King { 215259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFF && 216259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 217259c8618SRussell King } 218259c8618SRussell King 219259c8618SRussell King static const struct sff_data sff_data = { 220259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 221259c8618SRussell King .module_supported = sff_module_supported, 222259c8618SRussell King }; 223259c8618SRussell King 224259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 225259c8618SRussell King { 226259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFP && 227259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 228259c8618SRussell King } 229259c8618SRussell King 230259c8618SRussell King static const struct sff_data sfp_data = { 231259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 232259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 233259c8618SRussell King .module_supported = sfp_module_supported, 234259c8618SRussell King }; 235259c8618SRussell King 236259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 237259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 238259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 239259c8618SRussell King { }, 240259c8618SRussell King }; 241259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 242259c8618SRussell King 24373970055SRussell King static unsigned long poll_jiffies; 24473970055SRussell King 24573970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 24673970055SRussell King { 24773970055SRussell King unsigned int i, state, v; 24873970055SRussell King 24973970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 25073970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 25173970055SRussell King continue; 25273970055SRussell King 25373970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 25473970055SRussell King if (v) 25573970055SRussell King state |= BIT(i); 25673970055SRussell King } 25773970055SRussell King 25873970055SRussell King return state; 25973970055SRussell King } 26073970055SRussell King 261259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 262259c8618SRussell King { 263259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 264259c8618SRussell King } 265259c8618SRussell King 26673970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 26773970055SRussell King { 26873970055SRussell King if (state & SFP_F_PRESENT) { 26973970055SRussell King /* If the module is present, drive the signals */ 27073970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 27173970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 27273970055SRussell King state & SFP_F_TX_DISABLE); 27373970055SRussell King if (state & SFP_F_RATE_SELECT) 27473970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 27573970055SRussell King state & SFP_F_RATE_SELECT); 27673970055SRussell King } else { 27773970055SRussell King /* Otherwise, let them float to the pull-ups */ 27873970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 27973970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 28073970055SRussell King if (state & SFP_F_RATE_SELECT) 28173970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 28273970055SRussell King } 28373970055SRussell King } 28473970055SRussell King 2853bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 2863bb35261SJon Nettleton size_t len) 28773970055SRussell King { 28873970055SRussell King struct i2c_msg msgs[2]; 2893bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 29028e74a7cSRussell King size_t this_len; 29173970055SRussell King int ret; 29273970055SRussell King 29373970055SRussell King msgs[0].addr = bus_addr; 29473970055SRussell King msgs[0].flags = 0; 29573970055SRussell King msgs[0].len = 1; 29673970055SRussell King msgs[0].buf = &dev_addr; 29773970055SRussell King msgs[1].addr = bus_addr; 29873970055SRussell King msgs[1].flags = I2C_M_RD; 29973970055SRussell King msgs[1].len = len; 30073970055SRussell King msgs[1].buf = buf; 30173970055SRussell King 30228e74a7cSRussell King while (len) { 30328e74a7cSRussell King this_len = len; 30428e74a7cSRussell King if (this_len > 16) 30528e74a7cSRussell King this_len = 16; 30628e74a7cSRussell King 30728e74a7cSRussell King msgs[1].len = this_len; 30828e74a7cSRussell King 3093bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 31073970055SRussell King if (ret < 0) 31173970055SRussell King return ret; 31273970055SRussell King 31328e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 31428e74a7cSRussell King break; 31528e74a7cSRussell King 31628e74a7cSRussell King msgs[1].buf += this_len; 31728e74a7cSRussell King dev_addr += this_len; 31828e74a7cSRussell King len -= this_len; 31928e74a7cSRussell King } 32028e74a7cSRussell King 32128e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 32273970055SRussell King } 32373970055SRussell King 3243bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 32573970055SRussell King size_t len) 32673970055SRussell King { 3273bb35261SJon Nettleton struct i2c_msg msgs[1]; 3283bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3293bb35261SJon Nettleton int ret; 3303bb35261SJon Nettleton 3313bb35261SJon Nettleton msgs[0].addr = bus_addr; 3323bb35261SJon Nettleton msgs[0].flags = 0; 3333bb35261SJon Nettleton msgs[0].len = 1 + len; 3343bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3353bb35261SJon Nettleton if (!msgs[0].buf) 3363bb35261SJon Nettleton return -ENOMEM; 3373bb35261SJon Nettleton 3383bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3393bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3403bb35261SJon Nettleton 3413bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3423bb35261SJon Nettleton 3433bb35261SJon Nettleton kfree(msgs[0].buf); 3443bb35261SJon Nettleton 3453bb35261SJon Nettleton if (ret < 0) 3463bb35261SJon Nettleton return ret; 3473bb35261SJon Nettleton 3483bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 34973970055SRussell King } 35073970055SRussell King 35173970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 35273970055SRussell King { 35373970055SRussell King struct mii_bus *i2c_mii; 35473970055SRussell King int ret; 35573970055SRussell King 35673970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 35773970055SRussell King return -EINVAL; 35873970055SRussell King 35973970055SRussell King sfp->i2c = i2c; 36073970055SRussell King sfp->read = sfp_i2c_read; 3613bb35261SJon Nettleton sfp->write = sfp_i2c_write; 36273970055SRussell King 36373970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 36473970055SRussell King if (IS_ERR(i2c_mii)) 36573970055SRussell King return PTR_ERR(i2c_mii); 36673970055SRussell King 36773970055SRussell King i2c_mii->name = "SFP I2C Bus"; 36873970055SRussell King i2c_mii->phy_mask = ~0; 36973970055SRussell King 37073970055SRussell King ret = mdiobus_register(i2c_mii); 37173970055SRussell King if (ret < 0) { 37273970055SRussell King mdiobus_free(i2c_mii); 37373970055SRussell King return ret; 37473970055SRussell King } 37573970055SRussell King 37673970055SRussell King sfp->i2c_mii = i2c_mii; 37773970055SRussell King 37873970055SRussell King return 0; 37973970055SRussell King } 38073970055SRussell King 38173970055SRussell King /* Interface */ 38273970055SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 38373970055SRussell King { 38473970055SRussell King return sfp->get_state(sfp); 38573970055SRussell King } 38673970055SRussell King 38773970055SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 38873970055SRussell King { 38973970055SRussell King sfp->set_state(sfp, state); 39073970055SRussell King } 39173970055SRussell King 39273970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 39373970055SRussell King { 39473970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 39573970055SRussell King } 39673970055SRussell King 3973bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 3983bb35261SJon Nettleton { 3993bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4003bb35261SJon Nettleton } 4013bb35261SJon Nettleton 40273970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 40373970055SRussell King { 40473970055SRussell King u8 *p, check; 40573970055SRussell King 40673970055SRussell King for (p = buf, check = 0; len; p++, len--) 40773970055SRussell King check += *p; 40873970055SRussell King 40973970055SRussell King return check; 41073970055SRussell King } 41173970055SRussell King 4121323061aSAndrew Lunn /* hwmon */ 4131323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 4141323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 4151323061aSAndrew Lunn enum hwmon_sensor_types type, 4161323061aSAndrew Lunn u32 attr, int channel) 4171323061aSAndrew Lunn { 4181323061aSAndrew Lunn const struct sfp *sfp = data; 4191323061aSAndrew Lunn 4201323061aSAndrew Lunn switch (type) { 4211323061aSAndrew Lunn case hwmon_temp: 4221323061aSAndrew Lunn switch (attr) { 4231323061aSAndrew Lunn case hwmon_temp_min_alarm: 4241323061aSAndrew Lunn case hwmon_temp_max_alarm: 4251323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 4261323061aSAndrew Lunn case hwmon_temp_crit_alarm: 4271323061aSAndrew Lunn case hwmon_temp_min: 4281323061aSAndrew Lunn case hwmon_temp_max: 4291323061aSAndrew Lunn case hwmon_temp_lcrit: 4301323061aSAndrew Lunn case hwmon_temp_crit: 431a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 432a33710bdSAndrew Lunn return 0; 433a33710bdSAndrew Lunn /* fall through */ 434a33710bdSAndrew Lunn case hwmon_temp_input: 435c1236979SAndrew Lunn case hwmon_temp_label: 4361323061aSAndrew Lunn return 0444; 4371323061aSAndrew Lunn default: 4381323061aSAndrew Lunn return 0; 4391323061aSAndrew Lunn } 4401323061aSAndrew Lunn case hwmon_in: 4411323061aSAndrew Lunn switch (attr) { 4421323061aSAndrew Lunn case hwmon_in_min_alarm: 4431323061aSAndrew Lunn case hwmon_in_max_alarm: 4441323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 4451323061aSAndrew Lunn case hwmon_in_crit_alarm: 4461323061aSAndrew Lunn case hwmon_in_min: 4471323061aSAndrew Lunn case hwmon_in_max: 4481323061aSAndrew Lunn case hwmon_in_lcrit: 4491323061aSAndrew Lunn case hwmon_in_crit: 450a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 451a33710bdSAndrew Lunn return 0; 452a33710bdSAndrew Lunn /* fall through */ 453a33710bdSAndrew Lunn case hwmon_in_input: 454c1236979SAndrew Lunn case hwmon_in_label: 4551323061aSAndrew Lunn return 0444; 4561323061aSAndrew Lunn default: 4571323061aSAndrew Lunn return 0; 4581323061aSAndrew Lunn } 4591323061aSAndrew Lunn case hwmon_curr: 4601323061aSAndrew Lunn switch (attr) { 4611323061aSAndrew Lunn case hwmon_curr_min_alarm: 4621323061aSAndrew Lunn case hwmon_curr_max_alarm: 4631323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 4641323061aSAndrew Lunn case hwmon_curr_crit_alarm: 4651323061aSAndrew Lunn case hwmon_curr_min: 4661323061aSAndrew Lunn case hwmon_curr_max: 4671323061aSAndrew Lunn case hwmon_curr_lcrit: 4681323061aSAndrew Lunn case hwmon_curr_crit: 469a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 470a33710bdSAndrew Lunn return 0; 471a33710bdSAndrew Lunn /* fall through */ 472a33710bdSAndrew Lunn case hwmon_curr_input: 473c1236979SAndrew Lunn case hwmon_curr_label: 4741323061aSAndrew Lunn return 0444; 4751323061aSAndrew Lunn default: 4761323061aSAndrew Lunn return 0; 4771323061aSAndrew Lunn } 4781323061aSAndrew Lunn case hwmon_power: 4791323061aSAndrew Lunn /* External calibration of receive power requires 4801323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 4811323061aSAndrew Lunn * is not easy, so just skip it. If the module does 4821323061aSAndrew Lunn * not require external calibration, we can however 4831323061aSAndrew Lunn * show receiver power, since FP is then not needed. 4841323061aSAndrew Lunn */ 4851323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 4861323061aSAndrew Lunn channel == 1) 4871323061aSAndrew Lunn return 0; 4881323061aSAndrew Lunn switch (attr) { 4891323061aSAndrew Lunn case hwmon_power_min_alarm: 4901323061aSAndrew Lunn case hwmon_power_max_alarm: 4911323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 4921323061aSAndrew Lunn case hwmon_power_crit_alarm: 4931323061aSAndrew Lunn case hwmon_power_min: 4941323061aSAndrew Lunn case hwmon_power_max: 4951323061aSAndrew Lunn case hwmon_power_lcrit: 4961323061aSAndrew Lunn case hwmon_power_crit: 497a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 498a33710bdSAndrew Lunn return 0; 499a33710bdSAndrew Lunn /* fall through */ 500a33710bdSAndrew Lunn case hwmon_power_input: 501c1236979SAndrew Lunn case hwmon_power_label: 5021323061aSAndrew Lunn return 0444; 5031323061aSAndrew Lunn default: 5041323061aSAndrew Lunn return 0; 5051323061aSAndrew Lunn } 5061323061aSAndrew Lunn default: 5071323061aSAndrew Lunn return 0; 5081323061aSAndrew Lunn } 5091323061aSAndrew Lunn } 5101323061aSAndrew Lunn 5111323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 5121323061aSAndrew Lunn { 5131323061aSAndrew Lunn __be16 val; 5141323061aSAndrew Lunn int err; 5151323061aSAndrew Lunn 5161323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 5171323061aSAndrew Lunn if (err < 0) 5181323061aSAndrew Lunn return err; 5191323061aSAndrew Lunn 5201323061aSAndrew Lunn *value = be16_to_cpu(val); 5211323061aSAndrew Lunn 5221323061aSAndrew Lunn return 0; 5231323061aSAndrew Lunn } 5241323061aSAndrew Lunn 5251323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 5261323061aSAndrew Lunn { 5270cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5281323061aSAndrew Lunn } 5291323061aSAndrew Lunn 5301323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 5311323061aSAndrew Lunn long *value) 5321323061aSAndrew Lunn { 5331323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 5341323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 5351323061aSAndrew Lunn } 5361323061aSAndrew Lunn 5371323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 5381323061aSAndrew Lunn { 5391323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 5401323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 5411323061aSAndrew Lunn 5421323061aSAndrew Lunn if (*value >= 0x8000) 5431323061aSAndrew Lunn *value -= 0x10000; 5441323061aSAndrew Lunn 5451323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 5461323061aSAndrew Lunn } 5471323061aSAndrew Lunn 5481323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 5491323061aSAndrew Lunn { 5501323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 5511323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 5521323061aSAndrew Lunn 5531323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5541323061aSAndrew Lunn } 5551323061aSAndrew Lunn 5561323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 5571323061aSAndrew Lunn { 5581323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 5591323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 5601323061aSAndrew Lunn 5611323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 5621323061aSAndrew Lunn } 5631323061aSAndrew Lunn 5641323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 5651323061aSAndrew Lunn { 5661323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 5671323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 5681323061aSAndrew Lunn 5691323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5701323061aSAndrew Lunn } 5711323061aSAndrew Lunn 5721323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 5731323061aSAndrew Lunn { 5741323061aSAndrew Lunn int err; 5751323061aSAndrew Lunn 5761323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5771323061aSAndrew Lunn if (err < 0) 5781323061aSAndrew Lunn return err; 5791323061aSAndrew Lunn 5801323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 5811323061aSAndrew Lunn 5821323061aSAndrew Lunn return 0; 5831323061aSAndrew Lunn } 5841323061aSAndrew Lunn 5851323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 5861323061aSAndrew Lunn { 5871323061aSAndrew Lunn int err; 5881323061aSAndrew Lunn 5891323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5901323061aSAndrew Lunn if (err < 0) 5911323061aSAndrew Lunn return err; 5921323061aSAndrew Lunn 5931323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 5941323061aSAndrew Lunn 5951323061aSAndrew Lunn return 0; 5961323061aSAndrew Lunn } 5971323061aSAndrew Lunn 5981323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 5991323061aSAndrew Lunn { 6001323061aSAndrew Lunn int err; 6011323061aSAndrew Lunn 6021323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6031323061aSAndrew Lunn if (err < 0) 6041323061aSAndrew Lunn return err; 6051323061aSAndrew Lunn 6061323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 6071323061aSAndrew Lunn 6081323061aSAndrew Lunn return 0; 6091323061aSAndrew Lunn } 6101323061aSAndrew Lunn 6111323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 6121323061aSAndrew Lunn { 6131323061aSAndrew Lunn int err; 6141323061aSAndrew Lunn 6151323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6161323061aSAndrew Lunn if (err < 0) 6171323061aSAndrew Lunn return err; 6181323061aSAndrew Lunn 6191323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 6201323061aSAndrew Lunn 6211323061aSAndrew Lunn return 0; 6221323061aSAndrew Lunn } 6231323061aSAndrew Lunn 6241323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 6251323061aSAndrew Lunn { 6261323061aSAndrew Lunn int err; 6271323061aSAndrew Lunn 6281323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6291323061aSAndrew Lunn if (err < 0) 6301323061aSAndrew Lunn return err; 6311323061aSAndrew Lunn 6321323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 6331323061aSAndrew Lunn 6341323061aSAndrew Lunn return 0; 6351323061aSAndrew Lunn } 6361323061aSAndrew Lunn 6371323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 6381323061aSAndrew Lunn { 6391323061aSAndrew Lunn u8 status; 6401323061aSAndrew Lunn int err; 6411323061aSAndrew Lunn 6421323061aSAndrew Lunn switch (attr) { 6431323061aSAndrew Lunn case hwmon_temp_input: 6441323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 6451323061aSAndrew Lunn 6461323061aSAndrew Lunn case hwmon_temp_lcrit: 6471323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 6481323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6491323061aSAndrew Lunn return 0; 6501323061aSAndrew Lunn 6511323061aSAndrew Lunn case hwmon_temp_min: 6521323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 6531323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6541323061aSAndrew Lunn return 0; 6551323061aSAndrew Lunn case hwmon_temp_max: 6561323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 6571323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6581323061aSAndrew Lunn return 0; 6591323061aSAndrew Lunn 6601323061aSAndrew Lunn case hwmon_temp_crit: 6611323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 6621323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6631323061aSAndrew Lunn return 0; 6641323061aSAndrew Lunn 6651323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 6661323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6671323061aSAndrew Lunn if (err < 0) 6681323061aSAndrew Lunn return err; 6691323061aSAndrew Lunn 6701323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 6711323061aSAndrew Lunn return 0; 6721323061aSAndrew Lunn 6731323061aSAndrew Lunn case hwmon_temp_min_alarm: 6741323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6751323061aSAndrew Lunn if (err < 0) 6761323061aSAndrew Lunn return err; 6771323061aSAndrew Lunn 6781323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 6791323061aSAndrew Lunn return 0; 6801323061aSAndrew Lunn 6811323061aSAndrew Lunn case hwmon_temp_max_alarm: 6821323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6831323061aSAndrew Lunn if (err < 0) 6841323061aSAndrew Lunn return err; 6851323061aSAndrew Lunn 6861323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 6871323061aSAndrew Lunn return 0; 6881323061aSAndrew Lunn 6891323061aSAndrew Lunn case hwmon_temp_crit_alarm: 6901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6911323061aSAndrew Lunn if (err < 0) 6921323061aSAndrew Lunn return err; 6931323061aSAndrew Lunn 6941323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 6951323061aSAndrew Lunn return 0; 6961323061aSAndrew Lunn default: 6971323061aSAndrew Lunn return -EOPNOTSUPP; 6981323061aSAndrew Lunn } 6991323061aSAndrew Lunn 7001323061aSAndrew Lunn return -EOPNOTSUPP; 7011323061aSAndrew Lunn } 7021323061aSAndrew Lunn 7031323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 7041323061aSAndrew Lunn { 7051323061aSAndrew Lunn u8 status; 7061323061aSAndrew Lunn int err; 7071323061aSAndrew Lunn 7081323061aSAndrew Lunn switch (attr) { 7091323061aSAndrew Lunn case hwmon_in_input: 7101323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 7111323061aSAndrew Lunn 7121323061aSAndrew Lunn case hwmon_in_lcrit: 7131323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 7141323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7151323061aSAndrew Lunn return 0; 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn case hwmon_in_min: 7181323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 7191323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7201323061aSAndrew Lunn return 0; 7211323061aSAndrew Lunn 7221323061aSAndrew Lunn case hwmon_in_max: 7231323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 7241323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7251323061aSAndrew Lunn return 0; 7261323061aSAndrew Lunn 7271323061aSAndrew Lunn case hwmon_in_crit: 7281323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 7291323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7301323061aSAndrew Lunn return 0; 7311323061aSAndrew Lunn 7321323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7331323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7341323061aSAndrew Lunn if (err < 0) 7351323061aSAndrew Lunn return err; 7361323061aSAndrew Lunn 7371323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 7381323061aSAndrew Lunn return 0; 7391323061aSAndrew Lunn 7401323061aSAndrew Lunn case hwmon_in_min_alarm: 7411323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7421323061aSAndrew Lunn if (err < 0) 7431323061aSAndrew Lunn return err; 7441323061aSAndrew Lunn 7451323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 7461323061aSAndrew Lunn return 0; 7471323061aSAndrew Lunn 7481323061aSAndrew Lunn case hwmon_in_max_alarm: 7491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7501323061aSAndrew Lunn if (err < 0) 7511323061aSAndrew Lunn return err; 7521323061aSAndrew Lunn 7531323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 7541323061aSAndrew Lunn return 0; 7551323061aSAndrew Lunn 7561323061aSAndrew Lunn case hwmon_in_crit_alarm: 7571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7581323061aSAndrew Lunn if (err < 0) 7591323061aSAndrew Lunn return err; 7601323061aSAndrew Lunn 7611323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 7621323061aSAndrew Lunn return 0; 7631323061aSAndrew Lunn default: 7641323061aSAndrew Lunn return -EOPNOTSUPP; 7651323061aSAndrew Lunn } 7661323061aSAndrew Lunn 7671323061aSAndrew Lunn return -EOPNOTSUPP; 7681323061aSAndrew Lunn } 7691323061aSAndrew Lunn 7701323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 7711323061aSAndrew Lunn { 7721323061aSAndrew Lunn u8 status; 7731323061aSAndrew Lunn int err; 7741323061aSAndrew Lunn 7751323061aSAndrew Lunn switch (attr) { 7761323061aSAndrew Lunn case hwmon_curr_input: 7771323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn case hwmon_curr_lcrit: 7801323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 7811323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7821323061aSAndrew Lunn return 0; 7831323061aSAndrew Lunn 7841323061aSAndrew Lunn case hwmon_curr_min: 7851323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 7861323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7871323061aSAndrew Lunn return 0; 7881323061aSAndrew Lunn 7891323061aSAndrew Lunn case hwmon_curr_max: 7901323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 7911323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7921323061aSAndrew Lunn return 0; 7931323061aSAndrew Lunn 7941323061aSAndrew Lunn case hwmon_curr_crit: 7951323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 7961323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7971323061aSAndrew Lunn return 0; 7981323061aSAndrew Lunn 7991323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 8001323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8011323061aSAndrew Lunn if (err < 0) 8021323061aSAndrew Lunn return err; 8031323061aSAndrew Lunn 8041323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 8051323061aSAndrew Lunn return 0; 8061323061aSAndrew Lunn 8071323061aSAndrew Lunn case hwmon_curr_min_alarm: 8081323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8091323061aSAndrew Lunn if (err < 0) 8101323061aSAndrew Lunn return err; 8111323061aSAndrew Lunn 8121323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 8131323061aSAndrew Lunn return 0; 8141323061aSAndrew Lunn 8151323061aSAndrew Lunn case hwmon_curr_max_alarm: 8161323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8171323061aSAndrew Lunn if (err < 0) 8181323061aSAndrew Lunn return err; 8191323061aSAndrew Lunn 8201323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 8211323061aSAndrew Lunn return 0; 8221323061aSAndrew Lunn 8231323061aSAndrew Lunn case hwmon_curr_crit_alarm: 8241323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8251323061aSAndrew Lunn if (err < 0) 8261323061aSAndrew Lunn return err; 8271323061aSAndrew Lunn 8281323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 8291323061aSAndrew Lunn return 0; 8301323061aSAndrew Lunn default: 8311323061aSAndrew Lunn return -EOPNOTSUPP; 8321323061aSAndrew Lunn } 8331323061aSAndrew Lunn 8341323061aSAndrew Lunn return -EOPNOTSUPP; 8351323061aSAndrew Lunn } 8361323061aSAndrew Lunn 8371323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 8381323061aSAndrew Lunn { 8391323061aSAndrew Lunn u8 status; 8401323061aSAndrew Lunn int err; 8411323061aSAndrew Lunn 8421323061aSAndrew Lunn switch (attr) { 8431323061aSAndrew Lunn case hwmon_power_input: 8441323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 8451323061aSAndrew Lunn 8461323061aSAndrew Lunn case hwmon_power_lcrit: 8471323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 8481323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8491323061aSAndrew Lunn return 0; 8501323061aSAndrew Lunn 8511323061aSAndrew Lunn case hwmon_power_min: 8521323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 8531323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8541323061aSAndrew Lunn return 0; 8551323061aSAndrew Lunn 8561323061aSAndrew Lunn case hwmon_power_max: 8571323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 8581323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8591323061aSAndrew Lunn return 0; 8601323061aSAndrew Lunn 8611323061aSAndrew Lunn case hwmon_power_crit: 8621323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 8631323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8641323061aSAndrew Lunn return 0; 8651323061aSAndrew Lunn 8661323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 8671323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8681323061aSAndrew Lunn if (err < 0) 8691323061aSAndrew Lunn return err; 8701323061aSAndrew Lunn 8711323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 8721323061aSAndrew Lunn return 0; 8731323061aSAndrew Lunn 8741323061aSAndrew Lunn case hwmon_power_min_alarm: 8751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8761323061aSAndrew Lunn if (err < 0) 8771323061aSAndrew Lunn return err; 8781323061aSAndrew Lunn 8791323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 8801323061aSAndrew Lunn return 0; 8811323061aSAndrew Lunn 8821323061aSAndrew Lunn case hwmon_power_max_alarm: 8831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8841323061aSAndrew Lunn if (err < 0) 8851323061aSAndrew Lunn return err; 8861323061aSAndrew Lunn 8871323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 8881323061aSAndrew Lunn return 0; 8891323061aSAndrew Lunn 8901323061aSAndrew Lunn case hwmon_power_crit_alarm: 8911323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8921323061aSAndrew Lunn if (err < 0) 8931323061aSAndrew Lunn return err; 8941323061aSAndrew Lunn 8951323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 8961323061aSAndrew Lunn return 0; 8971323061aSAndrew Lunn default: 8981323061aSAndrew Lunn return -EOPNOTSUPP; 8991323061aSAndrew Lunn } 9001323061aSAndrew Lunn 9011323061aSAndrew Lunn return -EOPNOTSUPP; 9021323061aSAndrew Lunn } 9031323061aSAndrew Lunn 9041323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 9051323061aSAndrew Lunn { 9061323061aSAndrew Lunn u8 status; 9071323061aSAndrew Lunn int err; 9081323061aSAndrew Lunn 9091323061aSAndrew Lunn switch (attr) { 9101323061aSAndrew Lunn case hwmon_power_input: 9111323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn case hwmon_power_lcrit: 9141323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 9151323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9161323061aSAndrew Lunn return 0; 9171323061aSAndrew Lunn 9181323061aSAndrew Lunn case hwmon_power_min: 9191323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 9201323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9211323061aSAndrew Lunn return 0; 9221323061aSAndrew Lunn 9231323061aSAndrew Lunn case hwmon_power_max: 9241323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 9251323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9261323061aSAndrew Lunn return 0; 9271323061aSAndrew Lunn 9281323061aSAndrew Lunn case hwmon_power_crit: 9291323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 9301323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9311323061aSAndrew Lunn return 0; 9321323061aSAndrew Lunn 9331323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9341323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9351323061aSAndrew Lunn if (err < 0) 9361323061aSAndrew Lunn return err; 9371323061aSAndrew Lunn 9381323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 9391323061aSAndrew Lunn return 0; 9401323061aSAndrew Lunn 9411323061aSAndrew Lunn case hwmon_power_min_alarm: 9421323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9431323061aSAndrew Lunn if (err < 0) 9441323061aSAndrew Lunn return err; 9451323061aSAndrew Lunn 9461323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 9471323061aSAndrew Lunn return 0; 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn case hwmon_power_max_alarm: 9501323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9511323061aSAndrew Lunn if (err < 0) 9521323061aSAndrew Lunn return err; 9531323061aSAndrew Lunn 9541323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 9551323061aSAndrew Lunn return 0; 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn case hwmon_power_crit_alarm: 9581323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9591323061aSAndrew Lunn if (err < 0) 9601323061aSAndrew Lunn return err; 9611323061aSAndrew Lunn 9621323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 9631323061aSAndrew Lunn return 0; 9641323061aSAndrew Lunn default: 9651323061aSAndrew Lunn return -EOPNOTSUPP; 9661323061aSAndrew Lunn } 9671323061aSAndrew Lunn 9681323061aSAndrew Lunn return -EOPNOTSUPP; 9691323061aSAndrew Lunn } 9701323061aSAndrew Lunn 9711323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 9721323061aSAndrew Lunn u32 attr, int channel, long *value) 9731323061aSAndrew Lunn { 9741323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 9751323061aSAndrew Lunn 9761323061aSAndrew Lunn switch (type) { 9771323061aSAndrew Lunn case hwmon_temp: 9781323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 9791323061aSAndrew Lunn case hwmon_in: 9801323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 9811323061aSAndrew Lunn case hwmon_curr: 9821323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 9831323061aSAndrew Lunn case hwmon_power: 9841323061aSAndrew Lunn switch (channel) { 9851323061aSAndrew Lunn case 0: 9861323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 9871323061aSAndrew Lunn case 1: 9881323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 9891323061aSAndrew Lunn default: 9901323061aSAndrew Lunn return -EOPNOTSUPP; 9911323061aSAndrew Lunn } 9921323061aSAndrew Lunn default: 9931323061aSAndrew Lunn return -EOPNOTSUPP; 9941323061aSAndrew Lunn } 9951323061aSAndrew Lunn } 9961323061aSAndrew Lunn 997c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 998c1236979SAndrew Lunn "TX_power", 999c1236979SAndrew Lunn "RX_power", 1000c1236979SAndrew Lunn }; 1001c1236979SAndrew Lunn 1002c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1003c1236979SAndrew Lunn enum hwmon_sensor_types type, 1004c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1005c1236979SAndrew Lunn { 1006c1236979SAndrew Lunn switch (type) { 1007c1236979SAndrew Lunn case hwmon_curr: 1008c1236979SAndrew Lunn switch (attr) { 1009c1236979SAndrew Lunn case hwmon_curr_label: 1010c1236979SAndrew Lunn *str = "bias"; 1011c1236979SAndrew Lunn return 0; 1012c1236979SAndrew Lunn default: 1013c1236979SAndrew Lunn return -EOPNOTSUPP; 1014c1236979SAndrew Lunn } 1015c1236979SAndrew Lunn break; 1016c1236979SAndrew Lunn case hwmon_temp: 1017c1236979SAndrew Lunn switch (attr) { 1018c1236979SAndrew Lunn case hwmon_temp_label: 1019c1236979SAndrew Lunn *str = "temperature"; 1020c1236979SAndrew Lunn return 0; 1021c1236979SAndrew Lunn default: 1022c1236979SAndrew Lunn return -EOPNOTSUPP; 1023c1236979SAndrew Lunn } 1024c1236979SAndrew Lunn break; 1025c1236979SAndrew Lunn case hwmon_in: 1026c1236979SAndrew Lunn switch (attr) { 1027c1236979SAndrew Lunn case hwmon_in_label: 1028c1236979SAndrew Lunn *str = "VCC"; 1029c1236979SAndrew Lunn return 0; 1030c1236979SAndrew Lunn default: 1031c1236979SAndrew Lunn return -EOPNOTSUPP; 1032c1236979SAndrew Lunn } 1033c1236979SAndrew Lunn break; 1034c1236979SAndrew Lunn case hwmon_power: 1035c1236979SAndrew Lunn switch (attr) { 1036c1236979SAndrew Lunn case hwmon_power_label: 1037c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1038c1236979SAndrew Lunn return 0; 1039c1236979SAndrew Lunn default: 1040c1236979SAndrew Lunn return -EOPNOTSUPP; 1041c1236979SAndrew Lunn } 1042c1236979SAndrew Lunn break; 1043c1236979SAndrew Lunn default: 1044c1236979SAndrew Lunn return -EOPNOTSUPP; 1045c1236979SAndrew Lunn } 1046c1236979SAndrew Lunn 1047c1236979SAndrew Lunn return -EOPNOTSUPP; 1048c1236979SAndrew Lunn } 1049c1236979SAndrew Lunn 10501323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 10511323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 10521323061aSAndrew Lunn .read = sfp_hwmon_read, 1053c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 10541323061aSAndrew Lunn }; 10551323061aSAndrew Lunn 10561323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 10571323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 10581323061aSAndrew Lunn 0, 10591323061aSAndrew Lunn }; 10601323061aSAndrew Lunn 10611323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 10621323061aSAndrew Lunn .type = hwmon_chip, 10631323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 10641323061aSAndrew Lunn }; 10651323061aSAndrew Lunn 10661323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 10671323061aSAndrew Lunn HWMON_T_INPUT | 10681323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 10691323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 10701323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1071c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1072c1236979SAndrew Lunn HWMON_T_LABEL, 10731323061aSAndrew Lunn 0, 10741323061aSAndrew Lunn }; 10751323061aSAndrew Lunn 10761323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 10771323061aSAndrew Lunn .type = hwmon_temp, 10781323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 10791323061aSAndrew Lunn }; 10801323061aSAndrew Lunn 10811323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 10821323061aSAndrew Lunn HWMON_I_INPUT | 10831323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 10841323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 10851323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1086c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1087c1236979SAndrew Lunn HWMON_I_LABEL, 10881323061aSAndrew Lunn 0, 10891323061aSAndrew Lunn }; 10901323061aSAndrew Lunn 10911323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 10921323061aSAndrew Lunn .type = hwmon_in, 10931323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 10941323061aSAndrew Lunn }; 10951323061aSAndrew Lunn 10961323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 10971323061aSAndrew Lunn HWMON_C_INPUT | 10981323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 10991323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 11001323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1101c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1102c1236979SAndrew Lunn HWMON_C_LABEL, 11031323061aSAndrew Lunn 0, 11041323061aSAndrew Lunn }; 11051323061aSAndrew Lunn 11061323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 11071323061aSAndrew Lunn .type = hwmon_curr, 11081323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 11091323061aSAndrew Lunn }; 11101323061aSAndrew Lunn 11111323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 11121323061aSAndrew Lunn /* Transmit power */ 11131323061aSAndrew Lunn HWMON_P_INPUT | 11141323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 11151323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 11161323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1117c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1118c1236979SAndrew Lunn HWMON_P_LABEL, 11191323061aSAndrew Lunn /* Receive power */ 11201323061aSAndrew Lunn HWMON_P_INPUT | 11211323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 11221323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 11231323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1124c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1125c1236979SAndrew Lunn HWMON_P_LABEL, 11261323061aSAndrew Lunn 0, 11271323061aSAndrew Lunn }; 11281323061aSAndrew Lunn 11291323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 11301323061aSAndrew Lunn .type = hwmon_power, 11311323061aSAndrew Lunn .config = sfp_hwmon_power_config, 11321323061aSAndrew Lunn }; 11331323061aSAndrew Lunn 11341323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 11351323061aSAndrew Lunn &sfp_hwmon_chip, 11361323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 11371323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 11381323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 11391323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 11401323061aSAndrew Lunn NULL, 11411323061aSAndrew Lunn }; 11421323061aSAndrew Lunn 11431323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 11441323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 11451323061aSAndrew Lunn .info = sfp_hwmon_info, 11461323061aSAndrew Lunn }; 11471323061aSAndrew Lunn 11481323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 11491323061aSAndrew Lunn { 11501323061aSAndrew Lunn int err, i; 11511323061aSAndrew Lunn 11521323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 11531323061aSAndrew Lunn return 0; 11541323061aSAndrew Lunn 11551323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 11561323061aSAndrew Lunn return 0; 11571323061aSAndrew Lunn 11581323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 11591323061aSAndrew Lunn /* This driver in general does not support address 11601323061aSAndrew Lunn * change. 11611323061aSAndrew Lunn */ 11621323061aSAndrew Lunn return 0; 11631323061aSAndrew Lunn 11641323061aSAndrew Lunn err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 11651323061aSAndrew Lunn if (err < 0) 11661323061aSAndrew Lunn return err; 11671323061aSAndrew Lunn 11681323061aSAndrew Lunn sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 11691323061aSAndrew Lunn if (!sfp->hwmon_name) 11701323061aSAndrew Lunn return -ENODEV; 11711323061aSAndrew Lunn 11721323061aSAndrew Lunn for (i = 0; sfp->hwmon_name[i]; i++) 11731323061aSAndrew Lunn if (hwmon_is_bad_char(sfp->hwmon_name[i])) 11741323061aSAndrew Lunn sfp->hwmon_name[i] = '_'; 11751323061aSAndrew Lunn 11761323061aSAndrew Lunn sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 11771323061aSAndrew Lunn sfp->hwmon_name, sfp, 11781323061aSAndrew Lunn &sfp_hwmon_chip_info, 11791323061aSAndrew Lunn NULL); 11801323061aSAndrew Lunn 11811323061aSAndrew Lunn return PTR_ERR_OR_ZERO(sfp->hwmon_dev); 11821323061aSAndrew Lunn } 11831323061aSAndrew Lunn 11841323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 11851323061aSAndrew Lunn { 11863e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 11871323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 11883e322474SAndrew Lunn sfp->hwmon_dev = NULL; 11891323061aSAndrew Lunn kfree(sfp->hwmon_name); 11901323061aSAndrew Lunn } 11913e322474SAndrew Lunn } 11921323061aSAndrew Lunn #else 11931323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 11941323061aSAndrew Lunn { 11951323061aSAndrew Lunn return 0; 11961323061aSAndrew Lunn } 11971323061aSAndrew Lunn 11981323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 11991323061aSAndrew Lunn { 12001323061aSAndrew Lunn } 12011323061aSAndrew Lunn #endif 12021323061aSAndrew Lunn 120373970055SRussell King /* Helpers */ 120473970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 120573970055SRussell King { 120673970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 120773970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 120873970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 120973970055SRussell King sfp_set_state(sfp, sfp->state); 121073970055SRussell King } 121173970055SRussell King 121273970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 121373970055SRussell King { 121473970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 121573970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 121673970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 121773970055SRussell King sfp_set_state(sfp, sfp->state); 121873970055SRussell King } 121973970055SRussell King 122073970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 122173970055SRussell King { 122273970055SRussell King unsigned int state = sfp->state; 122373970055SRussell King 122473970055SRussell King if (state & SFP_F_TX_DISABLE) 122573970055SRussell King return; 122673970055SRussell King 122773970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 122873970055SRussell King 122973970055SRussell King udelay(T_RESET_US); 123073970055SRussell King 123173970055SRussell King sfp_set_state(sfp, state); 123273970055SRussell King } 123373970055SRussell King 123473970055SRussell King /* SFP state machine */ 123573970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 123673970055SRussell King { 123773970055SRussell King if (timeout) 123873970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 123973970055SRussell King timeout); 124073970055SRussell King else 124173970055SRussell King cancel_delayed_work(&sfp->timeout); 124273970055SRussell King } 124373970055SRussell King 124473970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 124573970055SRussell King unsigned int timeout) 124673970055SRussell King { 124773970055SRussell King sfp->sm_state = state; 124873970055SRussell King sfp_sm_set_timer(sfp, timeout); 124973970055SRussell King } 125073970055SRussell King 12510936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1252516b29edSFlorian Fainelli unsigned int timeout) 125373970055SRussell King { 125473970055SRussell King sfp->sm_mod_state = state; 125573970055SRussell King sfp_sm_set_timer(sfp, timeout); 125673970055SRussell King } 125773970055SRussell King 125873970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 125973970055SRussell King { 126073970055SRussell King phy_stop(sfp->mod_phy); 126173970055SRussell King sfp_remove_phy(sfp->sfp_bus); 126273970055SRussell King phy_device_remove(sfp->mod_phy); 126373970055SRussell King phy_device_free(sfp->mod_phy); 126473970055SRussell King sfp->mod_phy = NULL; 126573970055SRussell King } 126673970055SRussell King 126773970055SRussell King static void sfp_sm_probe_phy(struct sfp *sfp) 126873970055SRussell King { 126973970055SRussell King struct phy_device *phy; 127073970055SRussell King int err; 127173970055SRussell King 127273970055SRussell King phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); 127320b56ed9SRussell King if (phy == ERR_PTR(-ENODEV)) { 127420b56ed9SRussell King dev_info(sfp->dev, "no PHY detected\n"); 127573970055SRussell King return; 127673970055SRussell King } 127720b56ed9SRussell King if (IS_ERR(phy)) { 127820b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 127973970055SRussell King return; 128073970055SRussell King } 128173970055SRussell King 128273970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 128373970055SRussell King if (err) { 128473970055SRussell King phy_device_remove(phy); 128573970055SRussell King phy_device_free(phy); 128673970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 128773970055SRussell King return; 128873970055SRussell King } 128973970055SRussell King 129073970055SRussell King sfp->mod_phy = phy; 129173970055SRussell King phy_start(phy); 129273970055SRussell King } 129373970055SRussell King 129473970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 129573970055SRussell King { 129673970055SRussell King sfp_link_up(sfp->sfp_bus); 129773970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 129873970055SRussell King } 129973970055SRussell King 130073970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 130173970055SRussell King { 130273970055SRussell King sfp_link_down(sfp->sfp_bus); 130373970055SRussell King } 130473970055SRussell King 130573970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 130673970055SRussell King { 130773970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 130873970055SRussell King 1309710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1310710dfbb0SRussell King * are set, we assume that no LOS signal is available. 131173970055SRussell King */ 1312acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 131373970055SRussell King los ^= SFP_F_LOS; 1314710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1315710dfbb0SRussell King los = 0; 131673970055SRussell King 131773970055SRussell King if (los) 131873970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 131973970055SRussell King else 132073970055SRussell King sfp_sm_link_up(sfp); 132173970055SRussell King } 132273970055SRussell King 1323710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1324710dfbb0SRussell King { 1325710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1326710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1327710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1328710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1329710dfbb0SRussell King } 1330710dfbb0SRussell King 1331710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1332710dfbb0SRussell King { 1333710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1334710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1335710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1336710dfbb0SRussell King event == SFP_E_LOS_LOW); 1337710dfbb0SRussell King } 1338710dfbb0SRussell King 133963ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 134073970055SRussell King { 134173970055SRussell King if (sfp->sm_retries && !--sfp->sm_retries) { 1342516b29edSFlorian Fainelli dev_err(sfp->dev, 1343516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 134473970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 134573970055SRussell King } else { 134673970055SRussell King if (warn) 134773970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 134873970055SRussell King 134963ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 135073970055SRussell King } 135173970055SRussell King } 135273970055SRussell King 135373970055SRussell King static void sfp_sm_mod_init(struct sfp *sfp) 135473970055SRussell King { 135573970055SRussell King sfp_module_tx_enable(sfp); 1356181f29daSRussell King } 135773970055SRussell King 1358181f29daSRussell King static void sfp_sm_probe_for_phy(struct sfp *sfp) 1359181f29daSRussell King { 136073970055SRussell King /* Setting the serdes link mode is guesswork: there's no 136173970055SRussell King * field in the EEPROM which indicates what mode should 136273970055SRussell King * be used. 136373970055SRussell King * 136473970055SRussell King * If it's a gigabit-only fiber module, it probably does 136573970055SRussell King * not have a PHY, so switch to 802.3z negotiation mode. 136673970055SRussell King * Otherwise, switch to SGMII mode (which is required to 136773970055SRussell King * support non-gigabit speeds) and probe for a PHY. 136873970055SRussell King */ 136973970055SRussell King if (sfp->id.base.e1000_base_t || 137073970055SRussell King sfp->id.base.e100_base_lx || 137173970055SRussell King sfp->id.base.e100_base_fx) 137273970055SRussell King sfp_sm_probe_phy(sfp); 137373970055SRussell King } 137473970055SRussell King 1375ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 13763bb35261SJon Nettleton { 1377ed32abb1SRussell King u32 power_mW = 1000; 13783bb35261SJon Nettleton 13793bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1380ed32abb1SRussell King power_mW = 1500; 13813bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1382ed32abb1SRussell King power_mW = 2000; 13833bb35261SJon Nettleton 1384ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 13857cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 13867cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 13877cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 13887cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 13897cfa9c92SRussell King /* The module appears not to implement bus address 13907cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 13917cfa9c92SRussell King * indicated mode. 13927cfa9c92SRussell King */ 13933bb35261SJon Nettleton dev_err(sfp->dev, 13943bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1395ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 13963bb35261SJon Nettleton return -EINVAL; 13977cfa9c92SRussell King } else { 13983bb35261SJon Nettleton dev_warn(sfp->dev, 13993bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1400ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 14013bb35261SJon Nettleton return 0; 14023bb35261SJon Nettleton } 14037cfa9c92SRussell King } 14047cfa9c92SRussell King 14057cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 14067cfa9c92SRussell King * an address change sequence, warn the user that the module may 14077cfa9c92SRussell King * not be functional. 14087cfa9c92SRussell King */ 14097cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 14107cfa9c92SRussell King dev_warn(sfp->dev, 14117cfa9c92SRussell King "Address Change Sequence not supported but module requies %u.%uW, module may not be functional\n", 14127cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 14137cfa9c92SRussell King return 0; 14147cfa9c92SRussell King } 14153bb35261SJon Nettleton 1416ed32abb1SRussell King sfp->module_power_mW = power_mW; 1417ed32abb1SRussell King 1418ed32abb1SRussell King return 0; 1419ed32abb1SRussell King } 1420ed32abb1SRussell King 1421ed32abb1SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp) 1422ed32abb1SRussell King { 1423ed32abb1SRussell King u8 val; 1424ed32abb1SRussell King int err; 1425ed32abb1SRussell King 1426ed32abb1SRussell King if (sfp->module_power_mW <= 1000) 14273bb35261SJon Nettleton return 0; 14283bb35261SJon Nettleton 14293bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 14303bb35261SJon Nettleton if (err != sizeof(val)) { 14313bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 14323bb35261SJon Nettleton err = -EAGAIN; 14333bb35261SJon Nettleton goto err; 14343bb35261SJon Nettleton } 14353bb35261SJon Nettleton 14363bb35261SJon Nettleton val |= BIT(0); 14373bb35261SJon Nettleton 14383bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 14393bb35261SJon Nettleton if (err != sizeof(val)) { 14403bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 14413bb35261SJon Nettleton err = -EAGAIN; 14423bb35261SJon Nettleton goto err; 14433bb35261SJon Nettleton } 14443bb35261SJon Nettleton 14453bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1446ed32abb1SRussell King sfp->module_power_mW / 1000, 1447ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 14483bb35261SJon Nettleton return T_HPOWER_LEVEL; 14493bb35261SJon Nettleton 14503bb35261SJon Nettleton err: 14513bb35261SJon Nettleton return err; 14523bb35261SJon Nettleton } 14533bb35261SJon Nettleton 145473970055SRussell King static int sfp_sm_mod_probe(struct sfp *sfp) 145573970055SRussell King { 145673970055SRussell King /* SFP module inserted - read I2C data */ 145773970055SRussell King struct sfp_eeprom_id id; 1458981f1f80SRussell King bool cotsworks; 145973970055SRussell King u8 check; 14603bb35261SJon Nettleton int ret; 146173970055SRussell King 14623bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 14633bb35261SJon Nettleton if (ret < 0) { 14643bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 146573970055SRussell King return -EAGAIN; 146673970055SRussell King } 146773970055SRussell King 14683bb35261SJon Nettleton if (ret != sizeof(id)) { 14693bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 147073970055SRussell King return -EAGAIN; 147173970055SRussell King } 147273970055SRussell King 1473981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1474981f1f80SRussell King * do the final programming with the final module part number, 1475981f1f80SRussell King * serial number and date code. 1476981f1f80SRussell King */ 1477981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1478981f1f80SRussell King 147973970055SRussell King /* Validate the checksum over the base structure */ 148073970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 148173970055SRussell King if (check != id.base.cc_base) { 1482981f1f80SRussell King if (cotsworks) { 1483981f1f80SRussell King dev_warn(sfp->dev, 1484981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1485981f1f80SRussell King check, id.base.cc_base); 1486981f1f80SRussell King } else { 148773970055SRussell King dev_err(sfp->dev, 1488981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1489981f1f80SRussell King check, id.base.cc_base); 149073970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1491981f1f80SRussell King 16, 1, &id, sizeof(id), true); 149273970055SRussell King return -EINVAL; 149373970055SRussell King } 1494981f1f80SRussell King } 149573970055SRussell King 149673970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 149773970055SRussell King if (check != id.ext.cc_ext) { 1498981f1f80SRussell King if (cotsworks) { 1499981f1f80SRussell King dev_warn(sfp->dev, 1500981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1501981f1f80SRussell King check, id.ext.cc_ext); 1502981f1f80SRussell King } else { 150373970055SRussell King dev_err(sfp->dev, 1504981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1505981f1f80SRussell King check, id.ext.cc_ext); 1506981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1507981f1f80SRussell King 16, 1, &id, sizeof(id), true); 150873970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 150973970055SRussell King } 1510981f1f80SRussell King } 151173970055SRussell King 151273970055SRussell King sfp->id = id; 151373970055SRussell King 1514a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1515a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1516a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1517a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1518a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1519a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 152073970055SRussell King 1521259c8618SRussell King /* Check whether we support this module */ 1522259c8618SRussell King if (!sfp->type->module_supported(&sfp->id)) { 1523259c8618SRussell King dev_err(sfp->dev, 1524259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 152573970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 152673970055SRussell King return -EINVAL; 152773970055SRussell King } 152873970055SRussell King 1529ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1530ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1531ec7681bdSRussell King dev_warn(sfp->dev, 1532ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1533ec7681bdSRussell King 1534ed32abb1SRussell King /* Parse the module power requirement */ 1535ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1536ed32abb1SRussell King if (ret < 0) 1537ed32abb1SRussell King return ret; 1538ed32abb1SRussell King 15391323061aSAndrew Lunn ret = sfp_hwmon_insert(sfp); 15401323061aSAndrew Lunn if (ret < 0) 15411323061aSAndrew Lunn return ret; 15421323061aSAndrew Lunn 15433bb35261SJon Nettleton ret = sfp_module_insert(sfp->sfp_bus, &sfp->id); 15443bb35261SJon Nettleton if (ret < 0) 15453bb35261SJon Nettleton return ret; 15463bb35261SJon Nettleton 15473bb35261SJon Nettleton return sfp_sm_mod_hpower(sfp); 154873970055SRussell King } 154973970055SRussell King 155073970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 155173970055SRussell King { 155273970055SRussell King sfp_module_remove(sfp->sfp_bus); 155373970055SRussell King 15541323061aSAndrew Lunn sfp_hwmon_remove(sfp); 15551323061aSAndrew Lunn 155673970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1557ed32abb1SRussell King sfp->module_power_mW = 0; 155873970055SRussell King 155973970055SRussell King dev_info(sfp->dev, "module removed\n"); 156073970055SRussell King } 156173970055SRussell King 1562e85d81a1SRussell King /* This state machine tracks the netdev up/down state */ 1563e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 156473970055SRussell King { 1565e85d81a1SRussell King switch (sfp->sm_dev_state) { 1566e85d81a1SRussell King default: 1567e85d81a1SRussell King if (event == SFP_E_DEV_UP) 1568e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1569e85d81a1SRussell King break; 157073970055SRussell King 1571e85d81a1SRussell King case SFP_DEV_UP: 15721539e0d3SRussell King if (event == SFP_E_DEV_DOWN) 1573e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1574e85d81a1SRussell King break; 1575e85d81a1SRussell King } 1576e85d81a1SRussell King } 157773970055SRussell King 1578d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1579d900954fSRussell King * the on-board EEPROM, and sets up the power level. 158073970055SRussell King */ 1581e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1582e85d81a1SRussell King { 1583d2e816c0SRussell King /* Handle remove event globally, it resets this state machine */ 1584d2e816c0SRussell King if (event == SFP_E_REMOVE) { 1585d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1586d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1587d2e816c0SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1588d2e816c0SRussell King return; 1589d2e816c0SRussell King } 1590d2e816c0SRussell King 159173970055SRussell King switch (sfp->sm_mod_state) { 159273970055SRussell King default: 15938e210b6bSRussell King if (event == SFP_E_INSERT && sfp->attached) 1594d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 159573970055SRussell King break; 159673970055SRussell King 159773970055SRussell King case SFP_MOD_PROBE: 1598d2e816c0SRussell King if (event == SFP_E_TIMEOUT) { 15993bb35261SJon Nettleton int val = sfp_sm_mod_probe(sfp); 160073970055SRussell King 16013bb35261SJon Nettleton if (val == 0) 16020936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 16033bb35261SJon Nettleton else if (val > 0) 16040936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, val); 16053bb35261SJon Nettleton else if (val != -EAGAIN) 16060936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 16073bb35261SJon Nettleton else 16083bb35261SJon Nettleton sfp_sm_set_timer(sfp, T_PROBE_RETRY); 160973970055SRussell King } 161073970055SRussell King break; 161173970055SRussell King 16123bb35261SJon Nettleton case SFP_MOD_HPOWER: 16133bb35261SJon Nettleton if (event == SFP_E_TIMEOUT) { 16140936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 16153bb35261SJon Nettleton break; 16163bb35261SJon Nettleton } 16173bb35261SJon Nettleton /* fallthrough */ 161873970055SRussell King case SFP_MOD_PRESENT: 161973970055SRussell King case SFP_MOD_ERROR: 162073970055SRussell King break; 162173970055SRussell King } 162273970055SRussell King } 162373970055SRussell King 1624e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 1625e85d81a1SRussell King { 1626eefa6f1fSRussell King unsigned long timeout; 1627eefa6f1fSRussell King 162873970055SRussell King /* Some events are global */ 162973970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 163073970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 163173970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 163273970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 163373970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 163473970055SRussell King sfp_sm_link_down(sfp); 163573970055SRussell King if (sfp->mod_phy) 163673970055SRussell King sfp_sm_phy_detach(sfp); 16371539e0d3SRussell King sfp_module_tx_disable(sfp); 163873970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 163973970055SRussell King return; 164073970055SRussell King } 164173970055SRussell King 164273970055SRussell King /* The main state machine */ 164373970055SRussell King switch (sfp->sm_state) { 164473970055SRussell King case SFP_S_DOWN: 1645eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 1646eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 1647eefa6f1fSRussell King break; 1648eefa6f1fSRussell King 164973970055SRussell King sfp_sm_mod_init(sfp); 1650eefa6f1fSRussell King 1651eefa6f1fSRussell King /* Initialise the fault clearance retries */ 1652eefa6f1fSRussell King sfp->sm_retries = 5; 1653eefa6f1fSRussell King 1654eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 1655eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 1656eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 1657eefa6f1fSRussell King */ 1658eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 1659eefa6f1fSRussell King break; 1660eefa6f1fSRussell King 1661eefa6f1fSRussell King case SFP_S_WAIT: 1662eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 1663eefa6f1fSRussell King break; 1664eefa6f1fSRussell King 1665eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 1666181f29daSRussell King /* Wait t_init before indicating that the link is up, 1667181f29daSRussell King * provided the current state indicates no TX_FAULT. If 1668181f29daSRussell King * TX_FAULT clears before this time, that's fine too. 1669181f29daSRussell King */ 1670eefa6f1fSRussell King timeout = T_INIT_JIFFIES; 1671eefa6f1fSRussell King if (timeout > T_WAIT) 1672eefa6f1fSRussell King timeout -= T_WAIT; 1673eefa6f1fSRussell King else 1674eefa6f1fSRussell King timeout = 1; 1675eefa6f1fSRussell King 1676eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 1677eefa6f1fSRussell King } else { 1678eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 1679eefa6f1fSRussell King * finished initialising. 1680eefa6f1fSRussell King */ 1681eefa6f1fSRussell King goto init_done; 1682181f29daSRussell King } 168373970055SRussell King break; 168473970055SRussell King 168573970055SRussell King case SFP_S_INIT: 1686d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 1687d23751a0SRussell King /* TX_FAULT is still asserted after t_init, so assume 1688d23751a0SRussell King * there is a fault. 1689d23751a0SRussell King */ 1690d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 1691d23751a0SRussell King sfp->sm_retries == 5); 1692d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 1693d23751a0SRussell King init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT 1694d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 1695d23751a0SRussell King */ 1696d23751a0SRussell King sfp_sm_probe_for_phy(sfp); 1697d23751a0SRussell King sfp_sm_link_check_los(sfp); 1698d23751a0SRussell King 1699d23751a0SRussell King /* Reset the fault retry count */ 1700d23751a0SRussell King sfp->sm_retries = 5; 1701d23751a0SRussell King } 1702d23751a0SRussell King break; 1703d23751a0SRussell King 1704d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 1705d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 1706d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 1707d23751a0SRussell King sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); 1708d23751a0SRussell King } 170973970055SRussell King break; 171073970055SRussell King 171173970055SRussell King case SFP_S_WAIT_LOS: 171273970055SRussell King if (event == SFP_E_TX_FAULT) 171363ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1714710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 171573970055SRussell King sfp_sm_link_up(sfp); 171673970055SRussell King break; 171773970055SRussell King 171873970055SRussell King case SFP_S_LINK_UP: 171973970055SRussell King if (event == SFP_E_TX_FAULT) { 172073970055SRussell King sfp_sm_link_down(sfp); 172163ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1722710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 172373970055SRussell King sfp_sm_link_down(sfp); 172473970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 172573970055SRussell King } 172673970055SRussell King break; 172773970055SRussell King 172873970055SRussell King case SFP_S_TX_FAULT: 172973970055SRussell King if (event == SFP_E_TIMEOUT) { 173073970055SRussell King sfp_module_tx_fault_reset(sfp); 173173970055SRussell King sfp_sm_next(sfp, SFP_S_REINIT, T_INIT_JIFFIES); 173273970055SRussell King } 173373970055SRussell King break; 173473970055SRussell King 173573970055SRussell King case SFP_S_REINIT: 173673970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 173763ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 173873970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 173973970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 174073970055SRussell King sfp_sm_link_check_los(sfp); 174173970055SRussell King } 174273970055SRussell King break; 174373970055SRussell King 174473970055SRussell King case SFP_S_TX_DISABLE: 174573970055SRussell King break; 174673970055SRussell King } 1747e85d81a1SRussell King } 1748e85d81a1SRussell King 1749e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 1750e85d81a1SRussell King { 1751e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 1752e85d81a1SRussell King 1753e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 1754e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 1755e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 1756e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 1757e85d81a1SRussell King event_to_str(event)); 1758e85d81a1SRussell King 1759e85d81a1SRussell King sfp_sm_module(sfp, event); 1760e85d81a1SRussell King sfp_sm_device(sfp, event); 1761e85d81a1SRussell King sfp_sm_main(sfp, event); 176273970055SRussell King 17634005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 17644005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 17654005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 17664005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 176773970055SRussell King 176873970055SRussell King mutex_unlock(&sfp->sm_mutex); 176973970055SRussell King } 177073970055SRussell King 1771b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 1772b5bfc21aSRussell King { 1773b5bfc21aSRussell King sfp->attached = true; 1774b5bfc21aSRussell King if (sfp->state & SFP_F_PRESENT) 1775b5bfc21aSRussell King sfp_sm_event(sfp, SFP_E_INSERT); 1776b5bfc21aSRussell King } 1777b5bfc21aSRussell King 1778b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 1779b5bfc21aSRussell King { 1780b5bfc21aSRussell King sfp->attached = false; 1781b5bfc21aSRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 1782b5bfc21aSRussell King } 1783b5bfc21aSRussell King 178473970055SRussell King static void sfp_start(struct sfp *sfp) 178573970055SRussell King { 178673970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 178773970055SRussell King } 178873970055SRussell King 178973970055SRussell King static void sfp_stop(struct sfp *sfp) 179073970055SRussell King { 179173970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 179273970055SRussell King } 179373970055SRussell King 179473970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 179573970055SRussell King { 179673970055SRussell King /* locking... and check module is present */ 179773970055SRussell King 1798ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 1799ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 180073970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 180173970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 180273970055SRussell King } else { 180373970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 180473970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 180573970055SRussell King } 180673970055SRussell King return 0; 180773970055SRussell King } 180873970055SRussell King 180973970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 181073970055SRussell King u8 *data) 181173970055SRussell King { 181273970055SRussell King unsigned int first, last, len; 181373970055SRussell King int ret; 181473970055SRussell King 181573970055SRussell King if (ee->len == 0) 181673970055SRussell King return -EINVAL; 181773970055SRussell King 181873970055SRussell King first = ee->offset; 181973970055SRussell King last = ee->offset + ee->len; 182073970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 182173970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 182273970055SRussell King len -= first; 182373970055SRussell King 18242794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 182573970055SRussell King if (ret < 0) 182673970055SRussell King return ret; 182773970055SRussell King 182873970055SRussell King first += len; 182973970055SRussell King data += len; 183073970055SRussell King } 18312794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 183273970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 183373970055SRussell King len -= first; 183473970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 183573970055SRussell King 18362794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 183773970055SRussell King if (ret < 0) 183873970055SRussell King return ret; 183973970055SRussell King } 184073970055SRussell King return 0; 184173970055SRussell King } 184273970055SRussell King 184373970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 1844b5bfc21aSRussell King .attach = sfp_attach, 1845b5bfc21aSRussell King .detach = sfp_detach, 184673970055SRussell King .start = sfp_start, 184773970055SRussell King .stop = sfp_stop, 184873970055SRussell King .module_info = sfp_module_info, 184973970055SRussell King .module_eeprom = sfp_module_eeprom, 185073970055SRussell King }; 185173970055SRussell King 185273970055SRussell King static void sfp_timeout(struct work_struct *work) 185373970055SRussell King { 185473970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 185573970055SRussell King 185673970055SRussell King rtnl_lock(); 185773970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 185873970055SRussell King rtnl_unlock(); 185973970055SRussell King } 186073970055SRussell King 186173970055SRussell King static void sfp_check_state(struct sfp *sfp) 186273970055SRussell King { 186373970055SRussell King unsigned int state, i, changed; 186473970055SRussell King 18652158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 186673970055SRussell King state = sfp_get_state(sfp); 186773970055SRussell King changed = state ^ sfp->state; 186873970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 186973970055SRussell King 187073970055SRussell King for (i = 0; i < GPIO_MAX; i++) 187173970055SRussell King if (changed & BIT(i)) 187273970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 187373970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 187473970055SRussell King 187573970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 187673970055SRussell King sfp->state = state; 187773970055SRussell King 187873970055SRussell King rtnl_lock(); 187973970055SRussell King if (changed & SFP_F_PRESENT) 188073970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 188173970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 188273970055SRussell King 188373970055SRussell King if (changed & SFP_F_TX_FAULT) 188473970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 188573970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 188673970055SRussell King 188773970055SRussell King if (changed & SFP_F_LOS) 188873970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 188973970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 189073970055SRussell King rtnl_unlock(); 18912158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 189273970055SRussell King } 189373970055SRussell King 189473970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 189573970055SRussell King { 189673970055SRussell King struct sfp *sfp = data; 189773970055SRussell King 189873970055SRussell King sfp_check_state(sfp); 189973970055SRussell King 190073970055SRussell King return IRQ_HANDLED; 190173970055SRussell King } 190273970055SRussell King 190373970055SRussell King static void sfp_poll(struct work_struct *work) 190473970055SRussell King { 190573970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 190673970055SRussell King 190773970055SRussell King sfp_check_state(sfp); 190873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 190973970055SRussell King } 191073970055SRussell King 191173970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 191273970055SRussell King { 191373970055SRussell King struct sfp *sfp; 191473970055SRussell King 191573970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 191673970055SRussell King if (!sfp) 191773970055SRussell King return ERR_PTR(-ENOMEM); 191873970055SRussell King 191973970055SRussell King sfp->dev = dev; 192073970055SRussell King 192173970055SRussell King mutex_init(&sfp->sm_mutex); 19222158e856SRobert Hancock mutex_init(&sfp->st_mutex); 192373970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 192473970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 192573970055SRussell King 192673970055SRussell King return sfp; 192773970055SRussell King } 192873970055SRussell King 192973970055SRussell King static void sfp_cleanup(void *data) 193073970055SRussell King { 193173970055SRussell King struct sfp *sfp = data; 193273970055SRussell King 193373970055SRussell King cancel_delayed_work_sync(&sfp->poll); 193473970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 193573970055SRussell King if (sfp->i2c_mii) { 193673970055SRussell King mdiobus_unregister(sfp->i2c_mii); 193773970055SRussell King mdiobus_free(sfp->i2c_mii); 193873970055SRussell King } 193973970055SRussell King if (sfp->i2c) 194073970055SRussell King i2c_put_adapter(sfp->i2c); 194173970055SRussell King kfree(sfp); 194273970055SRussell King } 194373970055SRussell King 194473970055SRussell King static int sfp_probe(struct platform_device *pdev) 194573970055SRussell King { 1946259c8618SRussell King const struct sff_data *sff; 19477ce236faSRuslan Babayev struct i2c_adapter *i2c; 194873970055SRussell King struct sfp *sfp; 194973970055SRussell King bool poll = false; 1950257c2559SRobert Hancock int err, i; 195173970055SRussell King 195273970055SRussell King sfp = sfp_alloc(&pdev->dev); 195373970055SRussell King if (IS_ERR(sfp)) 195473970055SRussell King return PTR_ERR(sfp); 195573970055SRussell King 195673970055SRussell King platform_set_drvdata(pdev, sfp); 195773970055SRussell King 195873970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 195973970055SRussell King if (err < 0) 196073970055SRussell King return err; 196173970055SRussell King 1962259c8618SRussell King sff = sfp->type = &sfp_data; 1963259c8618SRussell King 196473970055SRussell King if (pdev->dev.of_node) { 196573970055SRussell King struct device_node *node = pdev->dev.of_node; 1966259c8618SRussell King const struct of_device_id *id; 196773970055SRussell King struct device_node *np; 196873970055SRussell King 1969259c8618SRussell King id = of_match_node(sfp_of_match, node); 1970259c8618SRussell King if (WARN_ON(!id)) 1971259c8618SRussell King return -EINVAL; 1972259c8618SRussell King 1973259c8618SRussell King sff = sfp->type = id->data; 1974259c8618SRussell King 197573970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 197666ede1f9SAntoine Tenart if (!np) { 197766ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 197866ede1f9SAntoine Tenart return -ENODEV; 197966ede1f9SAntoine Tenart } 198073970055SRussell King 198173970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 198273970055SRussell King of_node_put(np); 19837ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 19847ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 19857ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 19867ce236faSRuslan Babayev struct fwnode_reference_args args; 19877ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 19887ce236faSRuslan Babayev int ret; 19897ce236faSRuslan Babayev 19907ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 19911086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 19927ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 19937ce236faSRuslan Babayev return -ENODEV; 19947ce236faSRuslan Babayev } 19957ce236faSRuslan Babayev 19967ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 19977ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 19987ce236faSRuslan Babayev } else { 19997ce236faSRuslan Babayev return -EINVAL; 20007ce236faSRuslan Babayev } 20017ce236faSRuslan Babayev 200273970055SRussell King if (!i2c) 200373970055SRussell King return -EPROBE_DEFER; 200473970055SRussell King 200573970055SRussell King err = sfp_i2c_configure(sfp, i2c); 200673970055SRussell King if (err < 0) { 200773970055SRussell King i2c_put_adapter(i2c); 200873970055SRussell King return err; 200973970055SRussell King } 201073970055SRussell King 2011259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2012259c8618SRussell King if (sff->gpios & BIT(i)) { 201373970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 201473970055SRussell King gpio_of_names[i], gpio_flags[i]); 201573970055SRussell King if (IS_ERR(sfp->gpio[i])) 201673970055SRussell King return PTR_ERR(sfp->gpio[i]); 201773970055SRussell King } 201873970055SRussell King 201973970055SRussell King sfp->get_state = sfp_gpio_get_state; 202073970055SRussell King sfp->set_state = sfp_gpio_set_state; 2021259c8618SRussell King 2022259c8618SRussell King /* Modules that have no detect signal are always present */ 2023259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2024259c8618SRussell King sfp->get_state = sff_gpio_get_state; 202573970055SRussell King 20263bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 20273bb35261SJon Nettleton &sfp->max_power_mW); 20283bb35261SJon Nettleton if (!sfp->max_power_mW) 20293bb35261SJon Nettleton sfp->max_power_mW = 1000; 20303bb35261SJon Nettleton 20313bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 20323bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 20333bb35261SJon Nettleton 203473970055SRussell King /* Get the initial state, and always signal TX disable, 203573970055SRussell King * since the network interface will not be up. 203673970055SRussell King */ 203773970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 203873970055SRussell King 203973970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 204073970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 204173970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 204273970055SRussell King sfp_set_state(sfp, sfp->state); 204373970055SRussell King sfp_module_tx_disable(sfp); 204473970055SRussell King 204573970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 204673970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 204773970055SRussell King continue; 204873970055SRussell King 2049257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 2050257c2559SRobert Hancock if (!sfp->gpio_irq[i]) { 205173970055SRussell King poll = true; 205273970055SRussell King continue; 205373970055SRussell King } 205473970055SRussell King 2055257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2056257c2559SRobert Hancock NULL, sfp_irq, 205773970055SRussell King IRQF_ONESHOT | 205873970055SRussell King IRQF_TRIGGER_RISING | 205973970055SRussell King IRQF_TRIGGER_FALLING, 206073970055SRussell King dev_name(sfp->dev), sfp); 2061257c2559SRobert Hancock if (err) { 2062257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 206373970055SRussell King poll = true; 206473970055SRussell King } 2065257c2559SRobert Hancock } 206673970055SRussell King 206773970055SRussell King if (poll) 206873970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 206973970055SRussell King 2070a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2071a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2072a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2073a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2074a1f5d1f0SAntoine Tenart */ 2075a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2076a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2077a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2078a1f5d1f0SAntoine Tenart 2079b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2080b5bfc21aSRussell King if (!sfp->sfp_bus) 2081b5bfc21aSRussell King return -ENOMEM; 2082b5bfc21aSRussell King 208373970055SRussell King return 0; 208473970055SRussell King } 208573970055SRussell King 208673970055SRussell King static int sfp_remove(struct platform_device *pdev) 208773970055SRussell King { 208873970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 208973970055SRussell King 209073970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 209173970055SRussell King 209273970055SRussell King return 0; 209373970055SRussell King } 209473970055SRussell King 2095257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2096257c2559SRobert Hancock { 2097257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2098257c2559SRobert Hancock int i; 2099257c2559SRobert Hancock 2100257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2101257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2102257c2559SRobert Hancock continue; 2103257c2559SRobert Hancock 2104257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2105257c2559SRobert Hancock } 2106257c2559SRobert Hancock 2107257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2108257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2109257c2559SRobert Hancock } 2110257c2559SRobert Hancock 211173970055SRussell King static struct platform_driver sfp_driver = { 211273970055SRussell King .probe = sfp_probe, 211373970055SRussell King .remove = sfp_remove, 2114257c2559SRobert Hancock .shutdown = sfp_shutdown, 211573970055SRussell King .driver = { 211673970055SRussell King .name = "sfp", 211773970055SRussell King .of_match_table = sfp_of_match, 211873970055SRussell King }, 211973970055SRussell King }; 212073970055SRussell King 212173970055SRussell King static int sfp_init(void) 212273970055SRussell King { 212373970055SRussell King poll_jiffies = msecs_to_jiffies(100); 212473970055SRussell King 212573970055SRussell King return platform_driver_register(&sfp_driver); 212673970055SRussell King } 212773970055SRussell King module_init(sfp_init); 212873970055SRussell King 212973970055SRussell King static void sfp_exit(void) 213073970055SRussell King { 213173970055SRussell King platform_driver_unregister(&sfp_driver); 213273970055SRussell King } 213373970055SRussell King module_exit(sfp_exit); 213473970055SRussell King 213573970055SRussell King MODULE_ALIAS("platform:sfp"); 213673970055SRussell King MODULE_AUTHOR("Russell King"); 213773970055SRussell King MODULE_LICENSE("GPL v2"); 2138