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, 5973970055SRussell King SFP_S_WAIT_LOS, 6073970055SRussell King SFP_S_LINK_UP, 6173970055SRussell King SFP_S_TX_FAULT, 6273970055SRussell King SFP_S_REINIT, 6373970055SRussell King SFP_S_TX_DISABLE, 6473970055SRussell King }; 6573970055SRussell King 664005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 674005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 684005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 694005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 704005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 714005a7cbSAndrew Lunn [SFP_MOD_ERROR] = "error", 724005a7cbSAndrew Lunn }; 734005a7cbSAndrew Lunn 744005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 754005a7cbSAndrew Lunn { 764005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 774005a7cbSAndrew Lunn return "Unknown module state"; 784005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 794005a7cbSAndrew Lunn } 804005a7cbSAndrew Lunn 814005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 824005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 834005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 844005a7cbSAndrew Lunn }; 854005a7cbSAndrew Lunn 864005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 874005a7cbSAndrew Lunn { 884005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 894005a7cbSAndrew Lunn return "Unknown device state"; 904005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 914005a7cbSAndrew Lunn } 924005a7cbSAndrew Lunn 934005a7cbSAndrew Lunn static const char * const event_strings[] = { 944005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 954005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 964005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 974005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 984005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 994005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1004005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1014005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1024005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1034005a7cbSAndrew Lunn }; 1044005a7cbSAndrew Lunn 1054005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1064005a7cbSAndrew Lunn { 1074005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1084005a7cbSAndrew Lunn return "Unknown event"; 1094005a7cbSAndrew Lunn return event_strings[event]; 1104005a7cbSAndrew Lunn } 1114005a7cbSAndrew Lunn 1124005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1134005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 114eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1154005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 1164005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1174005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1184005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1194005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 1204005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_disable", 1214005a7cbSAndrew Lunn }; 1224005a7cbSAndrew Lunn 1234005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1244005a7cbSAndrew Lunn { 1254005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1264005a7cbSAndrew Lunn return "Unknown state"; 1274005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1284005a7cbSAndrew Lunn } 1294005a7cbSAndrew Lunn 13073970055SRussell King static const char *gpio_of_names[] = { 13125ee0793SBaruch Siach "mod-def0", 13273970055SRussell King "los", 13373970055SRussell King "tx-fault", 13473970055SRussell King "tx-disable", 13525ee0793SBaruch Siach "rate-select0", 13673970055SRussell King }; 13773970055SRussell King 13873970055SRussell King static const enum gpiod_flags gpio_flags[] = { 13973970055SRussell King GPIOD_IN, 14073970055SRussell King GPIOD_IN, 14173970055SRussell King GPIOD_IN, 14273970055SRussell King GPIOD_ASIS, 14373970055SRussell King GPIOD_ASIS, 14473970055SRussell King }; 14573970055SRussell King 146eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 14773970055SRussell King #define T_INIT_JIFFIES msecs_to_jiffies(300) 14873970055SRussell King #define T_RESET_US 10 14973970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 15073970055SRussell King 15173970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 15273970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 15373970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 15473970055SRussell King * 155d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 156d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 15773970055SRussell King */ 158d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 1593bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 16073970055SRussell King #define T_PROBE_RETRY msecs_to_jiffies(100) 16173970055SRussell King 162516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 16373970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 16473970055SRussell King */ 16573970055SRussell King #define SFP_PHY_ADDR 22 16673970055SRussell King 167259c8618SRussell King struct sff_data { 168259c8618SRussell King unsigned int gpios; 169259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 170259c8618SRussell King }; 171259c8618SRussell King 17273970055SRussell King struct sfp { 17373970055SRussell King struct device *dev; 17473970055SRussell King struct i2c_adapter *i2c; 17573970055SRussell King struct mii_bus *i2c_mii; 17673970055SRussell King struct sfp_bus *sfp_bus; 17773970055SRussell King struct phy_device *mod_phy; 178259c8618SRussell King const struct sff_data *type; 1793bb35261SJon Nettleton u32 max_power_mW; 18073970055SRussell King 18173970055SRussell King unsigned int (*get_state)(struct sfp *); 18273970055SRussell King void (*set_state)(struct sfp *, unsigned int); 18373970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 1843bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 18573970055SRussell King 18673970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 187257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 18873970055SRussell King 189b5bfc21aSRussell King bool attached; 1902158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 19173970055SRussell King unsigned int state; 19273970055SRussell King struct delayed_work poll; 19373970055SRussell King struct delayed_work timeout; 1942158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 19573970055SRussell King unsigned char sm_mod_state; 19673970055SRussell King unsigned char sm_dev_state; 19773970055SRussell King unsigned short sm_state; 19873970055SRussell King unsigned int sm_retries; 19973970055SRussell King 20073970055SRussell King struct sfp_eeprom_id id; 201ed32abb1SRussell King unsigned int module_power_mW; 202ed32abb1SRussell King 2031323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2041323061aSAndrew Lunn struct sfp_diag diag; 2051323061aSAndrew Lunn struct device *hwmon_dev; 2061323061aSAndrew Lunn char *hwmon_name; 2071323061aSAndrew Lunn #endif 2081323061aSAndrew Lunn 20973970055SRussell King }; 21073970055SRussell King 211259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 212259c8618SRussell King { 213259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFF && 214259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 215259c8618SRussell King } 216259c8618SRussell King 217259c8618SRussell King static const struct sff_data sff_data = { 218259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 219259c8618SRussell King .module_supported = sff_module_supported, 220259c8618SRussell King }; 221259c8618SRussell King 222259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 223259c8618SRussell King { 224259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFP && 225259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 226259c8618SRussell King } 227259c8618SRussell King 228259c8618SRussell King static const struct sff_data sfp_data = { 229259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 230259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 231259c8618SRussell King .module_supported = sfp_module_supported, 232259c8618SRussell King }; 233259c8618SRussell King 234259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 235259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 236259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 237259c8618SRussell King { }, 238259c8618SRussell King }; 239259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 240259c8618SRussell King 24173970055SRussell King static unsigned long poll_jiffies; 24273970055SRussell King 24373970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 24473970055SRussell King { 24573970055SRussell King unsigned int i, state, v; 24673970055SRussell King 24773970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 24873970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 24973970055SRussell King continue; 25073970055SRussell King 25173970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 25273970055SRussell King if (v) 25373970055SRussell King state |= BIT(i); 25473970055SRussell King } 25573970055SRussell King 25673970055SRussell King return state; 25773970055SRussell King } 25873970055SRussell King 259259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 260259c8618SRussell King { 261259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 262259c8618SRussell King } 263259c8618SRussell King 26473970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 26573970055SRussell King { 26673970055SRussell King if (state & SFP_F_PRESENT) { 26773970055SRussell King /* If the module is present, drive the signals */ 26873970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 26973970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 27073970055SRussell King state & SFP_F_TX_DISABLE); 27173970055SRussell King if (state & SFP_F_RATE_SELECT) 27273970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 27373970055SRussell King state & SFP_F_RATE_SELECT); 27473970055SRussell King } else { 27573970055SRussell King /* Otherwise, let them float to the pull-ups */ 27673970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 27773970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 27873970055SRussell King if (state & SFP_F_RATE_SELECT) 27973970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 28073970055SRussell King } 28173970055SRussell King } 28273970055SRussell King 2833bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 2843bb35261SJon Nettleton size_t len) 28573970055SRussell King { 28673970055SRussell King struct i2c_msg msgs[2]; 2873bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 28828e74a7cSRussell King size_t this_len; 28973970055SRussell King int ret; 29073970055SRussell King 29173970055SRussell King msgs[0].addr = bus_addr; 29273970055SRussell King msgs[0].flags = 0; 29373970055SRussell King msgs[0].len = 1; 29473970055SRussell King msgs[0].buf = &dev_addr; 29573970055SRussell King msgs[1].addr = bus_addr; 29673970055SRussell King msgs[1].flags = I2C_M_RD; 29773970055SRussell King msgs[1].len = len; 29873970055SRussell King msgs[1].buf = buf; 29973970055SRussell King 30028e74a7cSRussell King while (len) { 30128e74a7cSRussell King this_len = len; 30228e74a7cSRussell King if (this_len > 16) 30328e74a7cSRussell King this_len = 16; 30428e74a7cSRussell King 30528e74a7cSRussell King msgs[1].len = this_len; 30628e74a7cSRussell King 3073bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 30873970055SRussell King if (ret < 0) 30973970055SRussell King return ret; 31073970055SRussell King 31128e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 31228e74a7cSRussell King break; 31328e74a7cSRussell King 31428e74a7cSRussell King msgs[1].buf += this_len; 31528e74a7cSRussell King dev_addr += this_len; 31628e74a7cSRussell King len -= this_len; 31728e74a7cSRussell King } 31828e74a7cSRussell King 31928e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 32073970055SRussell King } 32173970055SRussell King 3223bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 32373970055SRussell King size_t len) 32473970055SRussell King { 3253bb35261SJon Nettleton struct i2c_msg msgs[1]; 3263bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3273bb35261SJon Nettleton int ret; 3283bb35261SJon Nettleton 3293bb35261SJon Nettleton msgs[0].addr = bus_addr; 3303bb35261SJon Nettleton msgs[0].flags = 0; 3313bb35261SJon Nettleton msgs[0].len = 1 + len; 3323bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3333bb35261SJon Nettleton if (!msgs[0].buf) 3343bb35261SJon Nettleton return -ENOMEM; 3353bb35261SJon Nettleton 3363bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3373bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3383bb35261SJon Nettleton 3393bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3403bb35261SJon Nettleton 3413bb35261SJon Nettleton kfree(msgs[0].buf); 3423bb35261SJon Nettleton 3433bb35261SJon Nettleton if (ret < 0) 3443bb35261SJon Nettleton return ret; 3453bb35261SJon Nettleton 3463bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 34773970055SRussell King } 34873970055SRussell King 34973970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 35073970055SRussell King { 35173970055SRussell King struct mii_bus *i2c_mii; 35273970055SRussell King int ret; 35373970055SRussell King 35473970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 35573970055SRussell King return -EINVAL; 35673970055SRussell King 35773970055SRussell King sfp->i2c = i2c; 35873970055SRussell King sfp->read = sfp_i2c_read; 3593bb35261SJon Nettleton sfp->write = sfp_i2c_write; 36073970055SRussell King 36173970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 36273970055SRussell King if (IS_ERR(i2c_mii)) 36373970055SRussell King return PTR_ERR(i2c_mii); 36473970055SRussell King 36573970055SRussell King i2c_mii->name = "SFP I2C Bus"; 36673970055SRussell King i2c_mii->phy_mask = ~0; 36773970055SRussell King 36873970055SRussell King ret = mdiobus_register(i2c_mii); 36973970055SRussell King if (ret < 0) { 37073970055SRussell King mdiobus_free(i2c_mii); 37173970055SRussell King return ret; 37273970055SRussell King } 37373970055SRussell King 37473970055SRussell King sfp->i2c_mii = i2c_mii; 37573970055SRussell King 37673970055SRussell King return 0; 37773970055SRussell King } 37873970055SRussell King 37973970055SRussell King /* Interface */ 38073970055SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 38173970055SRussell King { 38273970055SRussell King return sfp->get_state(sfp); 38373970055SRussell King } 38473970055SRussell King 38573970055SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 38673970055SRussell King { 38773970055SRussell King sfp->set_state(sfp, state); 38873970055SRussell King } 38973970055SRussell King 39073970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 39173970055SRussell King { 39273970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 39373970055SRussell King } 39473970055SRussell King 3953bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 3963bb35261SJon Nettleton { 3973bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 3983bb35261SJon Nettleton } 3993bb35261SJon Nettleton 40073970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 40173970055SRussell King { 40273970055SRussell King u8 *p, check; 40373970055SRussell King 40473970055SRussell King for (p = buf, check = 0; len; p++, len--) 40573970055SRussell King check += *p; 40673970055SRussell King 40773970055SRussell King return check; 40873970055SRussell King } 40973970055SRussell King 4101323061aSAndrew Lunn /* hwmon */ 4111323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 4121323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 4131323061aSAndrew Lunn enum hwmon_sensor_types type, 4141323061aSAndrew Lunn u32 attr, int channel) 4151323061aSAndrew Lunn { 4161323061aSAndrew Lunn const struct sfp *sfp = data; 4171323061aSAndrew Lunn 4181323061aSAndrew Lunn switch (type) { 4191323061aSAndrew Lunn case hwmon_temp: 4201323061aSAndrew Lunn switch (attr) { 4211323061aSAndrew Lunn case hwmon_temp_min_alarm: 4221323061aSAndrew Lunn case hwmon_temp_max_alarm: 4231323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 4241323061aSAndrew Lunn case hwmon_temp_crit_alarm: 4251323061aSAndrew Lunn case hwmon_temp_min: 4261323061aSAndrew Lunn case hwmon_temp_max: 4271323061aSAndrew Lunn case hwmon_temp_lcrit: 4281323061aSAndrew Lunn case hwmon_temp_crit: 429a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 430a33710bdSAndrew Lunn return 0; 431a33710bdSAndrew Lunn /* fall through */ 432a33710bdSAndrew Lunn case hwmon_temp_input: 433c1236979SAndrew Lunn case hwmon_temp_label: 4341323061aSAndrew Lunn return 0444; 4351323061aSAndrew Lunn default: 4361323061aSAndrew Lunn return 0; 4371323061aSAndrew Lunn } 4381323061aSAndrew Lunn case hwmon_in: 4391323061aSAndrew Lunn switch (attr) { 4401323061aSAndrew Lunn case hwmon_in_min_alarm: 4411323061aSAndrew Lunn case hwmon_in_max_alarm: 4421323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 4431323061aSAndrew Lunn case hwmon_in_crit_alarm: 4441323061aSAndrew Lunn case hwmon_in_min: 4451323061aSAndrew Lunn case hwmon_in_max: 4461323061aSAndrew Lunn case hwmon_in_lcrit: 4471323061aSAndrew Lunn case hwmon_in_crit: 448a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 449a33710bdSAndrew Lunn return 0; 450a33710bdSAndrew Lunn /* fall through */ 451a33710bdSAndrew Lunn case hwmon_in_input: 452c1236979SAndrew Lunn case hwmon_in_label: 4531323061aSAndrew Lunn return 0444; 4541323061aSAndrew Lunn default: 4551323061aSAndrew Lunn return 0; 4561323061aSAndrew Lunn } 4571323061aSAndrew Lunn case hwmon_curr: 4581323061aSAndrew Lunn switch (attr) { 4591323061aSAndrew Lunn case hwmon_curr_min_alarm: 4601323061aSAndrew Lunn case hwmon_curr_max_alarm: 4611323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 4621323061aSAndrew Lunn case hwmon_curr_crit_alarm: 4631323061aSAndrew Lunn case hwmon_curr_min: 4641323061aSAndrew Lunn case hwmon_curr_max: 4651323061aSAndrew Lunn case hwmon_curr_lcrit: 4661323061aSAndrew Lunn case hwmon_curr_crit: 467a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 468a33710bdSAndrew Lunn return 0; 469a33710bdSAndrew Lunn /* fall through */ 470a33710bdSAndrew Lunn case hwmon_curr_input: 471c1236979SAndrew Lunn case hwmon_curr_label: 4721323061aSAndrew Lunn return 0444; 4731323061aSAndrew Lunn default: 4741323061aSAndrew Lunn return 0; 4751323061aSAndrew Lunn } 4761323061aSAndrew Lunn case hwmon_power: 4771323061aSAndrew Lunn /* External calibration of receive power requires 4781323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 4791323061aSAndrew Lunn * is not easy, so just skip it. If the module does 4801323061aSAndrew Lunn * not require external calibration, we can however 4811323061aSAndrew Lunn * show receiver power, since FP is then not needed. 4821323061aSAndrew Lunn */ 4831323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 4841323061aSAndrew Lunn channel == 1) 4851323061aSAndrew Lunn return 0; 4861323061aSAndrew Lunn switch (attr) { 4871323061aSAndrew Lunn case hwmon_power_min_alarm: 4881323061aSAndrew Lunn case hwmon_power_max_alarm: 4891323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 4901323061aSAndrew Lunn case hwmon_power_crit_alarm: 4911323061aSAndrew Lunn case hwmon_power_min: 4921323061aSAndrew Lunn case hwmon_power_max: 4931323061aSAndrew Lunn case hwmon_power_lcrit: 4941323061aSAndrew Lunn case hwmon_power_crit: 495a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 496a33710bdSAndrew Lunn return 0; 497a33710bdSAndrew Lunn /* fall through */ 498a33710bdSAndrew Lunn case hwmon_power_input: 499c1236979SAndrew Lunn case hwmon_power_label: 5001323061aSAndrew Lunn return 0444; 5011323061aSAndrew Lunn default: 5021323061aSAndrew Lunn return 0; 5031323061aSAndrew Lunn } 5041323061aSAndrew Lunn default: 5051323061aSAndrew Lunn return 0; 5061323061aSAndrew Lunn } 5071323061aSAndrew Lunn } 5081323061aSAndrew Lunn 5091323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 5101323061aSAndrew Lunn { 5111323061aSAndrew Lunn __be16 val; 5121323061aSAndrew Lunn int err; 5131323061aSAndrew Lunn 5141323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 5151323061aSAndrew Lunn if (err < 0) 5161323061aSAndrew Lunn return err; 5171323061aSAndrew Lunn 5181323061aSAndrew Lunn *value = be16_to_cpu(val); 5191323061aSAndrew Lunn 5201323061aSAndrew Lunn return 0; 5211323061aSAndrew Lunn } 5221323061aSAndrew Lunn 5231323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 5241323061aSAndrew Lunn { 5250cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5261323061aSAndrew Lunn } 5271323061aSAndrew Lunn 5281323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 5291323061aSAndrew Lunn long *value) 5301323061aSAndrew Lunn { 5311323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 5321323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 5331323061aSAndrew Lunn } 5341323061aSAndrew Lunn 5351323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 5361323061aSAndrew Lunn { 5371323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 5381323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 5391323061aSAndrew Lunn 5401323061aSAndrew Lunn if (*value >= 0x8000) 5411323061aSAndrew Lunn *value -= 0x10000; 5421323061aSAndrew Lunn 5431323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 5441323061aSAndrew Lunn } 5451323061aSAndrew Lunn 5461323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 5471323061aSAndrew Lunn { 5481323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 5491323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 5501323061aSAndrew Lunn 5511323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5521323061aSAndrew Lunn } 5531323061aSAndrew Lunn 5541323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 5551323061aSAndrew Lunn { 5561323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 5571323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 5581323061aSAndrew Lunn 5591323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 5601323061aSAndrew Lunn } 5611323061aSAndrew Lunn 5621323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 5631323061aSAndrew Lunn { 5641323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 5651323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 5661323061aSAndrew Lunn 5671323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5681323061aSAndrew Lunn } 5691323061aSAndrew Lunn 5701323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 5711323061aSAndrew Lunn { 5721323061aSAndrew Lunn int err; 5731323061aSAndrew Lunn 5741323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5751323061aSAndrew Lunn if (err < 0) 5761323061aSAndrew Lunn return err; 5771323061aSAndrew Lunn 5781323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 5791323061aSAndrew Lunn 5801323061aSAndrew Lunn return 0; 5811323061aSAndrew Lunn } 5821323061aSAndrew Lunn 5831323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 5841323061aSAndrew Lunn { 5851323061aSAndrew Lunn int err; 5861323061aSAndrew Lunn 5871323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5881323061aSAndrew Lunn if (err < 0) 5891323061aSAndrew Lunn return err; 5901323061aSAndrew Lunn 5911323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 5921323061aSAndrew Lunn 5931323061aSAndrew Lunn return 0; 5941323061aSAndrew Lunn } 5951323061aSAndrew Lunn 5961323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 5971323061aSAndrew Lunn { 5981323061aSAndrew Lunn int err; 5991323061aSAndrew Lunn 6001323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6011323061aSAndrew Lunn if (err < 0) 6021323061aSAndrew Lunn return err; 6031323061aSAndrew Lunn 6041323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 6051323061aSAndrew Lunn 6061323061aSAndrew Lunn return 0; 6071323061aSAndrew Lunn } 6081323061aSAndrew Lunn 6091323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 6101323061aSAndrew Lunn { 6111323061aSAndrew Lunn int err; 6121323061aSAndrew Lunn 6131323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6141323061aSAndrew Lunn if (err < 0) 6151323061aSAndrew Lunn return err; 6161323061aSAndrew Lunn 6171323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 6181323061aSAndrew Lunn 6191323061aSAndrew Lunn return 0; 6201323061aSAndrew Lunn } 6211323061aSAndrew Lunn 6221323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 6231323061aSAndrew Lunn { 6241323061aSAndrew Lunn int err; 6251323061aSAndrew Lunn 6261323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6271323061aSAndrew Lunn if (err < 0) 6281323061aSAndrew Lunn return err; 6291323061aSAndrew Lunn 6301323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 6311323061aSAndrew Lunn 6321323061aSAndrew Lunn return 0; 6331323061aSAndrew Lunn } 6341323061aSAndrew Lunn 6351323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 6361323061aSAndrew Lunn { 6371323061aSAndrew Lunn u8 status; 6381323061aSAndrew Lunn int err; 6391323061aSAndrew Lunn 6401323061aSAndrew Lunn switch (attr) { 6411323061aSAndrew Lunn case hwmon_temp_input: 6421323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 6431323061aSAndrew Lunn 6441323061aSAndrew Lunn case hwmon_temp_lcrit: 6451323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 6461323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6471323061aSAndrew Lunn return 0; 6481323061aSAndrew Lunn 6491323061aSAndrew Lunn case hwmon_temp_min: 6501323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 6511323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6521323061aSAndrew Lunn return 0; 6531323061aSAndrew Lunn case hwmon_temp_max: 6541323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 6551323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6561323061aSAndrew Lunn return 0; 6571323061aSAndrew Lunn 6581323061aSAndrew Lunn case hwmon_temp_crit: 6591323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 6601323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6611323061aSAndrew Lunn return 0; 6621323061aSAndrew Lunn 6631323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 6641323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6651323061aSAndrew Lunn if (err < 0) 6661323061aSAndrew Lunn return err; 6671323061aSAndrew Lunn 6681323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 6691323061aSAndrew Lunn return 0; 6701323061aSAndrew Lunn 6711323061aSAndrew Lunn case hwmon_temp_min_alarm: 6721323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6731323061aSAndrew Lunn if (err < 0) 6741323061aSAndrew Lunn return err; 6751323061aSAndrew Lunn 6761323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 6771323061aSAndrew Lunn return 0; 6781323061aSAndrew Lunn 6791323061aSAndrew Lunn case hwmon_temp_max_alarm: 6801323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6811323061aSAndrew Lunn if (err < 0) 6821323061aSAndrew Lunn return err; 6831323061aSAndrew Lunn 6841323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 6851323061aSAndrew Lunn return 0; 6861323061aSAndrew Lunn 6871323061aSAndrew Lunn case hwmon_temp_crit_alarm: 6881323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6891323061aSAndrew Lunn if (err < 0) 6901323061aSAndrew Lunn return err; 6911323061aSAndrew Lunn 6921323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 6931323061aSAndrew Lunn return 0; 6941323061aSAndrew Lunn default: 6951323061aSAndrew Lunn return -EOPNOTSUPP; 6961323061aSAndrew Lunn } 6971323061aSAndrew Lunn 6981323061aSAndrew Lunn return -EOPNOTSUPP; 6991323061aSAndrew Lunn } 7001323061aSAndrew Lunn 7011323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 7021323061aSAndrew Lunn { 7031323061aSAndrew Lunn u8 status; 7041323061aSAndrew Lunn int err; 7051323061aSAndrew Lunn 7061323061aSAndrew Lunn switch (attr) { 7071323061aSAndrew Lunn case hwmon_in_input: 7081323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 7091323061aSAndrew Lunn 7101323061aSAndrew Lunn case hwmon_in_lcrit: 7111323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 7121323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7131323061aSAndrew Lunn return 0; 7141323061aSAndrew Lunn 7151323061aSAndrew Lunn case hwmon_in_min: 7161323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 7171323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7181323061aSAndrew Lunn return 0; 7191323061aSAndrew Lunn 7201323061aSAndrew Lunn case hwmon_in_max: 7211323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 7221323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7231323061aSAndrew Lunn return 0; 7241323061aSAndrew Lunn 7251323061aSAndrew Lunn case hwmon_in_crit: 7261323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 7271323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7281323061aSAndrew Lunn return 0; 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7311323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7321323061aSAndrew Lunn if (err < 0) 7331323061aSAndrew Lunn return err; 7341323061aSAndrew Lunn 7351323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 7361323061aSAndrew Lunn return 0; 7371323061aSAndrew Lunn 7381323061aSAndrew Lunn case hwmon_in_min_alarm: 7391323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7401323061aSAndrew Lunn if (err < 0) 7411323061aSAndrew Lunn return err; 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 7441323061aSAndrew Lunn return 0; 7451323061aSAndrew Lunn 7461323061aSAndrew Lunn case hwmon_in_max_alarm: 7471323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7481323061aSAndrew Lunn if (err < 0) 7491323061aSAndrew Lunn return err; 7501323061aSAndrew Lunn 7511323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 7521323061aSAndrew Lunn return 0; 7531323061aSAndrew Lunn 7541323061aSAndrew Lunn case hwmon_in_crit_alarm: 7551323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7561323061aSAndrew Lunn if (err < 0) 7571323061aSAndrew Lunn return err; 7581323061aSAndrew Lunn 7591323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 7601323061aSAndrew Lunn return 0; 7611323061aSAndrew Lunn default: 7621323061aSAndrew Lunn return -EOPNOTSUPP; 7631323061aSAndrew Lunn } 7641323061aSAndrew Lunn 7651323061aSAndrew Lunn return -EOPNOTSUPP; 7661323061aSAndrew Lunn } 7671323061aSAndrew Lunn 7681323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 7691323061aSAndrew Lunn { 7701323061aSAndrew Lunn u8 status; 7711323061aSAndrew Lunn int err; 7721323061aSAndrew Lunn 7731323061aSAndrew Lunn switch (attr) { 7741323061aSAndrew Lunn case hwmon_curr_input: 7751323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 7761323061aSAndrew Lunn 7771323061aSAndrew Lunn case hwmon_curr_lcrit: 7781323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 7791323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7801323061aSAndrew Lunn return 0; 7811323061aSAndrew Lunn 7821323061aSAndrew Lunn case hwmon_curr_min: 7831323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 7841323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7851323061aSAndrew Lunn return 0; 7861323061aSAndrew Lunn 7871323061aSAndrew Lunn case hwmon_curr_max: 7881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 7891323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7901323061aSAndrew Lunn return 0; 7911323061aSAndrew Lunn 7921323061aSAndrew Lunn case hwmon_curr_crit: 7931323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 7941323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7951323061aSAndrew Lunn return 0; 7961323061aSAndrew Lunn 7971323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 7981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7991323061aSAndrew Lunn if (err < 0) 8001323061aSAndrew Lunn return err; 8011323061aSAndrew Lunn 8021323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 8031323061aSAndrew Lunn return 0; 8041323061aSAndrew Lunn 8051323061aSAndrew Lunn case hwmon_curr_min_alarm: 8061323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8071323061aSAndrew Lunn if (err < 0) 8081323061aSAndrew Lunn return err; 8091323061aSAndrew Lunn 8101323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 8111323061aSAndrew Lunn return 0; 8121323061aSAndrew Lunn 8131323061aSAndrew Lunn case hwmon_curr_max_alarm: 8141323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8151323061aSAndrew Lunn if (err < 0) 8161323061aSAndrew Lunn return err; 8171323061aSAndrew Lunn 8181323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 8191323061aSAndrew Lunn return 0; 8201323061aSAndrew Lunn 8211323061aSAndrew Lunn case hwmon_curr_crit_alarm: 8221323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8231323061aSAndrew Lunn if (err < 0) 8241323061aSAndrew Lunn return err; 8251323061aSAndrew Lunn 8261323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 8271323061aSAndrew Lunn return 0; 8281323061aSAndrew Lunn default: 8291323061aSAndrew Lunn return -EOPNOTSUPP; 8301323061aSAndrew Lunn } 8311323061aSAndrew Lunn 8321323061aSAndrew Lunn return -EOPNOTSUPP; 8331323061aSAndrew Lunn } 8341323061aSAndrew Lunn 8351323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 8361323061aSAndrew Lunn { 8371323061aSAndrew Lunn u8 status; 8381323061aSAndrew Lunn int err; 8391323061aSAndrew Lunn 8401323061aSAndrew Lunn switch (attr) { 8411323061aSAndrew Lunn case hwmon_power_input: 8421323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 8431323061aSAndrew Lunn 8441323061aSAndrew Lunn case hwmon_power_lcrit: 8451323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 8461323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8471323061aSAndrew Lunn return 0; 8481323061aSAndrew Lunn 8491323061aSAndrew Lunn case hwmon_power_min: 8501323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 8511323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8521323061aSAndrew Lunn return 0; 8531323061aSAndrew Lunn 8541323061aSAndrew Lunn case hwmon_power_max: 8551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 8561323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8571323061aSAndrew Lunn return 0; 8581323061aSAndrew Lunn 8591323061aSAndrew Lunn case hwmon_power_crit: 8601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 8611323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8621323061aSAndrew Lunn return 0; 8631323061aSAndrew Lunn 8641323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 8651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8661323061aSAndrew Lunn if (err < 0) 8671323061aSAndrew Lunn return err; 8681323061aSAndrew Lunn 8691323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 8701323061aSAndrew Lunn return 0; 8711323061aSAndrew Lunn 8721323061aSAndrew Lunn case hwmon_power_min_alarm: 8731323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8741323061aSAndrew Lunn if (err < 0) 8751323061aSAndrew Lunn return err; 8761323061aSAndrew Lunn 8771323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 8781323061aSAndrew Lunn return 0; 8791323061aSAndrew Lunn 8801323061aSAndrew Lunn case hwmon_power_max_alarm: 8811323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8821323061aSAndrew Lunn if (err < 0) 8831323061aSAndrew Lunn return err; 8841323061aSAndrew Lunn 8851323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 8861323061aSAndrew Lunn return 0; 8871323061aSAndrew Lunn 8881323061aSAndrew Lunn case hwmon_power_crit_alarm: 8891323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8901323061aSAndrew Lunn if (err < 0) 8911323061aSAndrew Lunn return err; 8921323061aSAndrew Lunn 8931323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 8941323061aSAndrew Lunn return 0; 8951323061aSAndrew Lunn default: 8961323061aSAndrew Lunn return -EOPNOTSUPP; 8971323061aSAndrew Lunn } 8981323061aSAndrew Lunn 8991323061aSAndrew Lunn return -EOPNOTSUPP; 9001323061aSAndrew Lunn } 9011323061aSAndrew Lunn 9021323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 9031323061aSAndrew Lunn { 9041323061aSAndrew Lunn u8 status; 9051323061aSAndrew Lunn int err; 9061323061aSAndrew Lunn 9071323061aSAndrew Lunn switch (attr) { 9081323061aSAndrew Lunn case hwmon_power_input: 9091323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 9101323061aSAndrew Lunn 9111323061aSAndrew Lunn case hwmon_power_lcrit: 9121323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 9131323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9141323061aSAndrew Lunn return 0; 9151323061aSAndrew Lunn 9161323061aSAndrew Lunn case hwmon_power_min: 9171323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 9181323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9191323061aSAndrew Lunn return 0; 9201323061aSAndrew Lunn 9211323061aSAndrew Lunn case hwmon_power_max: 9221323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 9231323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9241323061aSAndrew Lunn return 0; 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn case hwmon_power_crit: 9271323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 9281323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9291323061aSAndrew Lunn return 0; 9301323061aSAndrew Lunn 9311323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9331323061aSAndrew Lunn if (err < 0) 9341323061aSAndrew Lunn return err; 9351323061aSAndrew Lunn 9361323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 9371323061aSAndrew Lunn return 0; 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn case hwmon_power_min_alarm: 9401323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9411323061aSAndrew Lunn if (err < 0) 9421323061aSAndrew Lunn return err; 9431323061aSAndrew Lunn 9441323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 9451323061aSAndrew Lunn return 0; 9461323061aSAndrew Lunn 9471323061aSAndrew Lunn case hwmon_power_max_alarm: 9481323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9491323061aSAndrew Lunn if (err < 0) 9501323061aSAndrew Lunn return err; 9511323061aSAndrew Lunn 9521323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 9531323061aSAndrew Lunn return 0; 9541323061aSAndrew Lunn 9551323061aSAndrew Lunn case hwmon_power_crit_alarm: 9561323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9571323061aSAndrew Lunn if (err < 0) 9581323061aSAndrew Lunn return err; 9591323061aSAndrew Lunn 9601323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 9611323061aSAndrew Lunn return 0; 9621323061aSAndrew Lunn default: 9631323061aSAndrew Lunn return -EOPNOTSUPP; 9641323061aSAndrew Lunn } 9651323061aSAndrew Lunn 9661323061aSAndrew Lunn return -EOPNOTSUPP; 9671323061aSAndrew Lunn } 9681323061aSAndrew Lunn 9691323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 9701323061aSAndrew Lunn u32 attr, int channel, long *value) 9711323061aSAndrew Lunn { 9721323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 9731323061aSAndrew Lunn 9741323061aSAndrew Lunn switch (type) { 9751323061aSAndrew Lunn case hwmon_temp: 9761323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 9771323061aSAndrew Lunn case hwmon_in: 9781323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 9791323061aSAndrew Lunn case hwmon_curr: 9801323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 9811323061aSAndrew Lunn case hwmon_power: 9821323061aSAndrew Lunn switch (channel) { 9831323061aSAndrew Lunn case 0: 9841323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 9851323061aSAndrew Lunn case 1: 9861323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 9871323061aSAndrew Lunn default: 9881323061aSAndrew Lunn return -EOPNOTSUPP; 9891323061aSAndrew Lunn } 9901323061aSAndrew Lunn default: 9911323061aSAndrew Lunn return -EOPNOTSUPP; 9921323061aSAndrew Lunn } 9931323061aSAndrew Lunn } 9941323061aSAndrew Lunn 995c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 996c1236979SAndrew Lunn "TX_power", 997c1236979SAndrew Lunn "RX_power", 998c1236979SAndrew Lunn }; 999c1236979SAndrew Lunn 1000c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1001c1236979SAndrew Lunn enum hwmon_sensor_types type, 1002c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1003c1236979SAndrew Lunn { 1004c1236979SAndrew Lunn switch (type) { 1005c1236979SAndrew Lunn case hwmon_curr: 1006c1236979SAndrew Lunn switch (attr) { 1007c1236979SAndrew Lunn case hwmon_curr_label: 1008c1236979SAndrew Lunn *str = "bias"; 1009c1236979SAndrew Lunn return 0; 1010c1236979SAndrew Lunn default: 1011c1236979SAndrew Lunn return -EOPNOTSUPP; 1012c1236979SAndrew Lunn } 1013c1236979SAndrew Lunn break; 1014c1236979SAndrew Lunn case hwmon_temp: 1015c1236979SAndrew Lunn switch (attr) { 1016c1236979SAndrew Lunn case hwmon_temp_label: 1017c1236979SAndrew Lunn *str = "temperature"; 1018c1236979SAndrew Lunn return 0; 1019c1236979SAndrew Lunn default: 1020c1236979SAndrew Lunn return -EOPNOTSUPP; 1021c1236979SAndrew Lunn } 1022c1236979SAndrew Lunn break; 1023c1236979SAndrew Lunn case hwmon_in: 1024c1236979SAndrew Lunn switch (attr) { 1025c1236979SAndrew Lunn case hwmon_in_label: 1026c1236979SAndrew Lunn *str = "VCC"; 1027c1236979SAndrew Lunn return 0; 1028c1236979SAndrew Lunn default: 1029c1236979SAndrew Lunn return -EOPNOTSUPP; 1030c1236979SAndrew Lunn } 1031c1236979SAndrew Lunn break; 1032c1236979SAndrew Lunn case hwmon_power: 1033c1236979SAndrew Lunn switch (attr) { 1034c1236979SAndrew Lunn case hwmon_power_label: 1035c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1036c1236979SAndrew Lunn return 0; 1037c1236979SAndrew Lunn default: 1038c1236979SAndrew Lunn return -EOPNOTSUPP; 1039c1236979SAndrew Lunn } 1040c1236979SAndrew Lunn break; 1041c1236979SAndrew Lunn default: 1042c1236979SAndrew Lunn return -EOPNOTSUPP; 1043c1236979SAndrew Lunn } 1044c1236979SAndrew Lunn 1045c1236979SAndrew Lunn return -EOPNOTSUPP; 1046c1236979SAndrew Lunn } 1047c1236979SAndrew Lunn 10481323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 10491323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 10501323061aSAndrew Lunn .read = sfp_hwmon_read, 1051c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 10521323061aSAndrew Lunn }; 10531323061aSAndrew Lunn 10541323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 10551323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 10561323061aSAndrew Lunn 0, 10571323061aSAndrew Lunn }; 10581323061aSAndrew Lunn 10591323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 10601323061aSAndrew Lunn .type = hwmon_chip, 10611323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 10621323061aSAndrew Lunn }; 10631323061aSAndrew Lunn 10641323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 10651323061aSAndrew Lunn HWMON_T_INPUT | 10661323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 10671323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 10681323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1069c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1070c1236979SAndrew Lunn HWMON_T_LABEL, 10711323061aSAndrew Lunn 0, 10721323061aSAndrew Lunn }; 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 10751323061aSAndrew Lunn .type = hwmon_temp, 10761323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 10771323061aSAndrew Lunn }; 10781323061aSAndrew Lunn 10791323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 10801323061aSAndrew Lunn HWMON_I_INPUT | 10811323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 10821323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 10831323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1084c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1085c1236979SAndrew Lunn HWMON_I_LABEL, 10861323061aSAndrew Lunn 0, 10871323061aSAndrew Lunn }; 10881323061aSAndrew Lunn 10891323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 10901323061aSAndrew Lunn .type = hwmon_in, 10911323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 10921323061aSAndrew Lunn }; 10931323061aSAndrew Lunn 10941323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 10951323061aSAndrew Lunn HWMON_C_INPUT | 10961323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 10971323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 10981323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1099c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1100c1236979SAndrew Lunn HWMON_C_LABEL, 11011323061aSAndrew Lunn 0, 11021323061aSAndrew Lunn }; 11031323061aSAndrew Lunn 11041323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 11051323061aSAndrew Lunn .type = hwmon_curr, 11061323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 11071323061aSAndrew Lunn }; 11081323061aSAndrew Lunn 11091323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 11101323061aSAndrew Lunn /* Transmit power */ 11111323061aSAndrew Lunn HWMON_P_INPUT | 11121323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 11131323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 11141323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1115c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1116c1236979SAndrew Lunn HWMON_P_LABEL, 11171323061aSAndrew Lunn /* Receive power */ 11181323061aSAndrew Lunn HWMON_P_INPUT | 11191323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 11201323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 11211323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1122c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1123c1236979SAndrew Lunn HWMON_P_LABEL, 11241323061aSAndrew Lunn 0, 11251323061aSAndrew Lunn }; 11261323061aSAndrew Lunn 11271323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 11281323061aSAndrew Lunn .type = hwmon_power, 11291323061aSAndrew Lunn .config = sfp_hwmon_power_config, 11301323061aSAndrew Lunn }; 11311323061aSAndrew Lunn 11321323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 11331323061aSAndrew Lunn &sfp_hwmon_chip, 11341323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 11351323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 11361323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 11371323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 11381323061aSAndrew Lunn NULL, 11391323061aSAndrew Lunn }; 11401323061aSAndrew Lunn 11411323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 11421323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 11431323061aSAndrew Lunn .info = sfp_hwmon_info, 11441323061aSAndrew Lunn }; 11451323061aSAndrew Lunn 11461323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 11471323061aSAndrew Lunn { 11481323061aSAndrew Lunn int err, i; 11491323061aSAndrew Lunn 11501323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 11511323061aSAndrew Lunn return 0; 11521323061aSAndrew Lunn 11531323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 11541323061aSAndrew Lunn return 0; 11551323061aSAndrew Lunn 11561323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 11571323061aSAndrew Lunn /* This driver in general does not support address 11581323061aSAndrew Lunn * change. 11591323061aSAndrew Lunn */ 11601323061aSAndrew Lunn return 0; 11611323061aSAndrew Lunn 11621323061aSAndrew Lunn err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 11631323061aSAndrew Lunn if (err < 0) 11641323061aSAndrew Lunn return err; 11651323061aSAndrew Lunn 11661323061aSAndrew Lunn sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 11671323061aSAndrew Lunn if (!sfp->hwmon_name) 11681323061aSAndrew Lunn return -ENODEV; 11691323061aSAndrew Lunn 11701323061aSAndrew Lunn for (i = 0; sfp->hwmon_name[i]; i++) 11711323061aSAndrew Lunn if (hwmon_is_bad_char(sfp->hwmon_name[i])) 11721323061aSAndrew Lunn sfp->hwmon_name[i] = '_'; 11731323061aSAndrew Lunn 11741323061aSAndrew Lunn sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 11751323061aSAndrew Lunn sfp->hwmon_name, sfp, 11761323061aSAndrew Lunn &sfp_hwmon_chip_info, 11771323061aSAndrew Lunn NULL); 11781323061aSAndrew Lunn 11791323061aSAndrew Lunn return PTR_ERR_OR_ZERO(sfp->hwmon_dev); 11801323061aSAndrew Lunn } 11811323061aSAndrew Lunn 11821323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 11831323061aSAndrew Lunn { 11843e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 11851323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 11863e322474SAndrew Lunn sfp->hwmon_dev = NULL; 11871323061aSAndrew Lunn kfree(sfp->hwmon_name); 11881323061aSAndrew Lunn } 11893e322474SAndrew Lunn } 11901323061aSAndrew Lunn #else 11911323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 11921323061aSAndrew Lunn { 11931323061aSAndrew Lunn return 0; 11941323061aSAndrew Lunn } 11951323061aSAndrew Lunn 11961323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 11971323061aSAndrew Lunn { 11981323061aSAndrew Lunn } 11991323061aSAndrew Lunn #endif 12001323061aSAndrew Lunn 120173970055SRussell King /* Helpers */ 120273970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 120373970055SRussell King { 120473970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 120573970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 120673970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 120773970055SRussell King sfp_set_state(sfp, sfp->state); 120873970055SRussell King } 120973970055SRussell King 121073970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 121173970055SRussell King { 121273970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 121373970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 121473970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 121573970055SRussell King sfp_set_state(sfp, sfp->state); 121673970055SRussell King } 121773970055SRussell King 121873970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 121973970055SRussell King { 122073970055SRussell King unsigned int state = sfp->state; 122173970055SRussell King 122273970055SRussell King if (state & SFP_F_TX_DISABLE) 122373970055SRussell King return; 122473970055SRussell King 122573970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 122673970055SRussell King 122773970055SRussell King udelay(T_RESET_US); 122873970055SRussell King 122973970055SRussell King sfp_set_state(sfp, state); 123073970055SRussell King } 123173970055SRussell King 123273970055SRussell King /* SFP state machine */ 123373970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 123473970055SRussell King { 123573970055SRussell King if (timeout) 123673970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 123773970055SRussell King timeout); 123873970055SRussell King else 123973970055SRussell King cancel_delayed_work(&sfp->timeout); 124073970055SRussell King } 124173970055SRussell King 124273970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 124373970055SRussell King unsigned int timeout) 124473970055SRussell King { 124573970055SRussell King sfp->sm_state = state; 124673970055SRussell King sfp_sm_set_timer(sfp, timeout); 124773970055SRussell King } 124873970055SRussell King 12490936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1250516b29edSFlorian Fainelli unsigned int timeout) 125173970055SRussell King { 125273970055SRussell King sfp->sm_mod_state = state; 125373970055SRussell King sfp_sm_set_timer(sfp, timeout); 125473970055SRussell King } 125573970055SRussell King 125673970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 125773970055SRussell King { 125873970055SRussell King phy_stop(sfp->mod_phy); 125973970055SRussell King sfp_remove_phy(sfp->sfp_bus); 126073970055SRussell King phy_device_remove(sfp->mod_phy); 126173970055SRussell King phy_device_free(sfp->mod_phy); 126273970055SRussell King sfp->mod_phy = NULL; 126373970055SRussell King } 126473970055SRussell King 126573970055SRussell King static void sfp_sm_probe_phy(struct sfp *sfp) 126673970055SRussell King { 126773970055SRussell King struct phy_device *phy; 126873970055SRussell King int err; 126973970055SRussell King 127073970055SRussell King phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); 127120b56ed9SRussell King if (phy == ERR_PTR(-ENODEV)) { 127220b56ed9SRussell King dev_info(sfp->dev, "no PHY detected\n"); 127373970055SRussell King return; 127473970055SRussell King } 127520b56ed9SRussell King if (IS_ERR(phy)) { 127620b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 127773970055SRussell King return; 127873970055SRussell King } 127973970055SRussell King 128073970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 128173970055SRussell King if (err) { 128273970055SRussell King phy_device_remove(phy); 128373970055SRussell King phy_device_free(phy); 128473970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 128573970055SRussell King return; 128673970055SRussell King } 128773970055SRussell King 128873970055SRussell King sfp->mod_phy = phy; 128973970055SRussell King phy_start(phy); 129073970055SRussell King } 129173970055SRussell King 129273970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 129373970055SRussell King { 129473970055SRussell King sfp_link_up(sfp->sfp_bus); 129573970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 129673970055SRussell King } 129773970055SRussell King 129873970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 129973970055SRussell King { 130073970055SRussell King sfp_link_down(sfp->sfp_bus); 130173970055SRussell King } 130273970055SRussell King 130373970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 130473970055SRussell King { 130573970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 130673970055SRussell King 1307710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1308710dfbb0SRussell King * are set, we assume that no LOS signal is available. 130973970055SRussell King */ 1310acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 131173970055SRussell King los ^= SFP_F_LOS; 1312710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1313710dfbb0SRussell King los = 0; 131473970055SRussell King 131573970055SRussell King if (los) 131673970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 131773970055SRussell King else 131873970055SRussell King sfp_sm_link_up(sfp); 131973970055SRussell King } 132073970055SRussell King 1321710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1322710dfbb0SRussell King { 1323710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1324710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1325710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1326710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1327710dfbb0SRussell King } 1328710dfbb0SRussell King 1329710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1330710dfbb0SRussell King { 1331710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1332710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1333710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1334710dfbb0SRussell King event == SFP_E_LOS_LOW); 1335710dfbb0SRussell King } 1336710dfbb0SRussell King 133773970055SRussell King static void sfp_sm_fault(struct sfp *sfp, bool warn) 133873970055SRussell King { 133973970055SRussell King if (sfp->sm_retries && !--sfp->sm_retries) { 1340516b29edSFlorian Fainelli dev_err(sfp->dev, 1341516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 134273970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 134373970055SRussell King } else { 134473970055SRussell King if (warn) 134573970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 134673970055SRussell King 134773970055SRussell King sfp_sm_next(sfp, SFP_S_TX_FAULT, T_FAULT_RECOVER); 134873970055SRussell King } 134973970055SRussell King } 135073970055SRussell King 135173970055SRussell King static void sfp_sm_mod_init(struct sfp *sfp) 135273970055SRussell King { 135373970055SRussell King sfp_module_tx_enable(sfp); 1354181f29daSRussell King } 135573970055SRussell King 1356181f29daSRussell King static void sfp_sm_probe_for_phy(struct sfp *sfp) 1357181f29daSRussell King { 135873970055SRussell King /* Setting the serdes link mode is guesswork: there's no 135973970055SRussell King * field in the EEPROM which indicates what mode should 136073970055SRussell King * be used. 136173970055SRussell King * 136273970055SRussell King * If it's a gigabit-only fiber module, it probably does 136373970055SRussell King * not have a PHY, so switch to 802.3z negotiation mode. 136473970055SRussell King * Otherwise, switch to SGMII mode (which is required to 136573970055SRussell King * support non-gigabit speeds) and probe for a PHY. 136673970055SRussell King */ 136773970055SRussell King if (sfp->id.base.e1000_base_t || 136873970055SRussell King sfp->id.base.e100_base_lx || 136973970055SRussell King sfp->id.base.e100_base_fx) 137073970055SRussell King sfp_sm_probe_phy(sfp); 137173970055SRussell King } 137273970055SRussell King 1373ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 13743bb35261SJon Nettleton { 1375ed32abb1SRussell King u32 power_mW = 1000; 13763bb35261SJon Nettleton 13773bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1378ed32abb1SRussell King power_mW = 1500; 13793bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1380ed32abb1SRussell King power_mW = 2000; 13813bb35261SJon Nettleton 1382ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 13837cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 13847cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 13857cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 13867cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 13877cfa9c92SRussell King /* The module appears not to implement bus address 13887cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 13897cfa9c92SRussell King * indicated mode. 13907cfa9c92SRussell King */ 13913bb35261SJon Nettleton dev_err(sfp->dev, 13923bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1393ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 13943bb35261SJon Nettleton return -EINVAL; 13957cfa9c92SRussell King } else { 13963bb35261SJon Nettleton dev_warn(sfp->dev, 13973bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1398ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 13993bb35261SJon Nettleton return 0; 14003bb35261SJon Nettleton } 14017cfa9c92SRussell King } 14027cfa9c92SRussell King 14037cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 14047cfa9c92SRussell King * an address change sequence, warn the user that the module may 14057cfa9c92SRussell King * not be functional. 14067cfa9c92SRussell King */ 14077cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 14087cfa9c92SRussell King dev_warn(sfp->dev, 14097cfa9c92SRussell King "Address Change Sequence not supported but module requies %u.%uW, module may not be functional\n", 14107cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 14117cfa9c92SRussell King return 0; 14127cfa9c92SRussell King } 14133bb35261SJon Nettleton 1414ed32abb1SRussell King sfp->module_power_mW = power_mW; 1415ed32abb1SRussell King 1416ed32abb1SRussell King return 0; 1417ed32abb1SRussell King } 1418ed32abb1SRussell King 1419ed32abb1SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp) 1420ed32abb1SRussell King { 1421ed32abb1SRussell King u8 val; 1422ed32abb1SRussell King int err; 1423ed32abb1SRussell King 1424ed32abb1SRussell King if (sfp->module_power_mW <= 1000) 14253bb35261SJon Nettleton return 0; 14263bb35261SJon Nettleton 14273bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 14283bb35261SJon Nettleton if (err != sizeof(val)) { 14293bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 14303bb35261SJon Nettleton err = -EAGAIN; 14313bb35261SJon Nettleton goto err; 14323bb35261SJon Nettleton } 14333bb35261SJon Nettleton 14343bb35261SJon Nettleton val |= BIT(0); 14353bb35261SJon Nettleton 14363bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 14373bb35261SJon Nettleton if (err != sizeof(val)) { 14383bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 14393bb35261SJon Nettleton err = -EAGAIN; 14403bb35261SJon Nettleton goto err; 14413bb35261SJon Nettleton } 14423bb35261SJon Nettleton 14433bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1444ed32abb1SRussell King sfp->module_power_mW / 1000, 1445ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 14463bb35261SJon Nettleton return T_HPOWER_LEVEL; 14473bb35261SJon Nettleton 14483bb35261SJon Nettleton err: 14493bb35261SJon Nettleton return err; 14503bb35261SJon Nettleton } 14513bb35261SJon Nettleton 145273970055SRussell King static int sfp_sm_mod_probe(struct sfp *sfp) 145373970055SRussell King { 145473970055SRussell King /* SFP module inserted - read I2C data */ 145573970055SRussell King struct sfp_eeprom_id id; 1456981f1f80SRussell King bool cotsworks; 145773970055SRussell King u8 check; 14583bb35261SJon Nettleton int ret; 145973970055SRussell King 14603bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 14613bb35261SJon Nettleton if (ret < 0) { 14623bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 146373970055SRussell King return -EAGAIN; 146473970055SRussell King } 146573970055SRussell King 14663bb35261SJon Nettleton if (ret != sizeof(id)) { 14673bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 146873970055SRussell King return -EAGAIN; 146973970055SRussell King } 147073970055SRussell King 1471981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1472981f1f80SRussell King * do the final programming with the final module part number, 1473981f1f80SRussell King * serial number and date code. 1474981f1f80SRussell King */ 1475981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1476981f1f80SRussell King 147773970055SRussell King /* Validate the checksum over the base structure */ 147873970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 147973970055SRussell King if (check != id.base.cc_base) { 1480981f1f80SRussell King if (cotsworks) { 1481981f1f80SRussell King dev_warn(sfp->dev, 1482981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1483981f1f80SRussell King check, id.base.cc_base); 1484981f1f80SRussell King } else { 148573970055SRussell King dev_err(sfp->dev, 1486981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1487981f1f80SRussell King check, id.base.cc_base); 148873970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1489981f1f80SRussell King 16, 1, &id, sizeof(id), true); 149073970055SRussell King return -EINVAL; 149173970055SRussell King } 1492981f1f80SRussell King } 149373970055SRussell King 149473970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 149573970055SRussell King if (check != id.ext.cc_ext) { 1496981f1f80SRussell King if (cotsworks) { 1497981f1f80SRussell King dev_warn(sfp->dev, 1498981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1499981f1f80SRussell King check, id.ext.cc_ext); 1500981f1f80SRussell King } else { 150173970055SRussell King dev_err(sfp->dev, 1502981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1503981f1f80SRussell King check, id.ext.cc_ext); 1504981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1505981f1f80SRussell King 16, 1, &id, sizeof(id), true); 150673970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 150773970055SRussell King } 1508981f1f80SRussell King } 150973970055SRussell King 151073970055SRussell King sfp->id = id; 151173970055SRussell King 1512a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1513a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1514a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1515a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1516a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1517a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 151873970055SRussell King 1519259c8618SRussell King /* Check whether we support this module */ 1520259c8618SRussell King if (!sfp->type->module_supported(&sfp->id)) { 1521259c8618SRussell King dev_err(sfp->dev, 1522259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 152373970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 152473970055SRussell King return -EINVAL; 152573970055SRussell King } 152673970055SRussell King 1527ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1528ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1529ec7681bdSRussell King dev_warn(sfp->dev, 1530ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1531ec7681bdSRussell King 1532ed32abb1SRussell King /* Parse the module power requirement */ 1533ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1534ed32abb1SRussell King if (ret < 0) 1535ed32abb1SRussell King return ret; 1536ed32abb1SRussell King 15371323061aSAndrew Lunn ret = sfp_hwmon_insert(sfp); 15381323061aSAndrew Lunn if (ret < 0) 15391323061aSAndrew Lunn return ret; 15401323061aSAndrew Lunn 15413bb35261SJon Nettleton ret = sfp_module_insert(sfp->sfp_bus, &sfp->id); 15423bb35261SJon Nettleton if (ret < 0) 15433bb35261SJon Nettleton return ret; 15443bb35261SJon Nettleton 15453bb35261SJon Nettleton return sfp_sm_mod_hpower(sfp); 154673970055SRussell King } 154773970055SRussell King 154873970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 154973970055SRussell King { 155073970055SRussell King sfp_module_remove(sfp->sfp_bus); 155173970055SRussell King 15521323061aSAndrew Lunn sfp_hwmon_remove(sfp); 15531323061aSAndrew Lunn 155473970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1555ed32abb1SRussell King sfp->module_power_mW = 0; 155673970055SRussell King 155773970055SRussell King dev_info(sfp->dev, "module removed\n"); 155873970055SRussell King } 155973970055SRussell King 1560e85d81a1SRussell King /* This state machine tracks the netdev up/down state */ 1561e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 156273970055SRussell King { 1563e85d81a1SRussell King switch (sfp->sm_dev_state) { 1564e85d81a1SRussell King default: 1565e85d81a1SRussell King if (event == SFP_E_DEV_UP) 1566e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1567e85d81a1SRussell King break; 156873970055SRussell King 1569e85d81a1SRussell King case SFP_DEV_UP: 15701539e0d3SRussell King if (event == SFP_E_DEV_DOWN) 1571e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1572e85d81a1SRussell King break; 1573e85d81a1SRussell King } 1574e85d81a1SRussell King } 157573970055SRussell King 1576d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1577d900954fSRussell King * the on-board EEPROM, and sets up the power level. 157873970055SRussell King */ 1579e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1580e85d81a1SRussell King { 1581d2e816c0SRussell King /* Handle remove event globally, it resets this state machine */ 1582d2e816c0SRussell King if (event == SFP_E_REMOVE) { 1583d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1584d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1585d2e816c0SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1586d2e816c0SRussell King return; 1587d2e816c0SRussell King } 1588d2e816c0SRussell King 158973970055SRussell King switch (sfp->sm_mod_state) { 159073970055SRussell King default: 15918e210b6bSRussell King if (event == SFP_E_INSERT && sfp->attached) 1592d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 159373970055SRussell King break; 159473970055SRussell King 159573970055SRussell King case SFP_MOD_PROBE: 1596d2e816c0SRussell King if (event == SFP_E_TIMEOUT) { 15973bb35261SJon Nettleton int val = sfp_sm_mod_probe(sfp); 159873970055SRussell King 15993bb35261SJon Nettleton if (val == 0) 16000936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 16013bb35261SJon Nettleton else if (val > 0) 16020936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, val); 16033bb35261SJon Nettleton else if (val != -EAGAIN) 16040936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 16053bb35261SJon Nettleton else 16063bb35261SJon Nettleton sfp_sm_set_timer(sfp, T_PROBE_RETRY); 160773970055SRussell King } 160873970055SRussell King break; 160973970055SRussell King 16103bb35261SJon Nettleton case SFP_MOD_HPOWER: 16113bb35261SJon Nettleton if (event == SFP_E_TIMEOUT) { 16120936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 16133bb35261SJon Nettleton break; 16143bb35261SJon Nettleton } 16153bb35261SJon Nettleton /* fallthrough */ 161673970055SRussell King case SFP_MOD_PRESENT: 161773970055SRussell King case SFP_MOD_ERROR: 161873970055SRussell King break; 161973970055SRussell King } 162073970055SRussell King } 162173970055SRussell King 1622e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 1623e85d81a1SRussell King { 1624eefa6f1fSRussell King unsigned long timeout; 1625eefa6f1fSRussell King 162673970055SRussell King /* Some events are global */ 162773970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 162873970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 162973970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 163073970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 163173970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 163273970055SRussell King sfp_sm_link_down(sfp); 163373970055SRussell King if (sfp->mod_phy) 163473970055SRussell King sfp_sm_phy_detach(sfp); 16351539e0d3SRussell King sfp_module_tx_disable(sfp); 163673970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 163773970055SRussell King return; 163873970055SRussell King } 163973970055SRussell King 164073970055SRussell King /* The main state machine */ 164173970055SRussell King switch (sfp->sm_state) { 164273970055SRussell King case SFP_S_DOWN: 1643eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 1644eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 1645eefa6f1fSRussell King break; 1646eefa6f1fSRussell King 164773970055SRussell King sfp_sm_mod_init(sfp); 1648eefa6f1fSRussell King 1649eefa6f1fSRussell King /* Initialise the fault clearance retries */ 1650eefa6f1fSRussell King sfp->sm_retries = 5; 1651eefa6f1fSRussell King 1652eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 1653eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 1654eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 1655eefa6f1fSRussell King */ 1656eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 1657eefa6f1fSRussell King break; 1658eefa6f1fSRussell King 1659eefa6f1fSRussell King case SFP_S_WAIT: 1660eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 1661eefa6f1fSRussell King break; 1662eefa6f1fSRussell King 1663181f29daSRussell King sfp_sm_probe_for_phy(sfp); 1664181f29daSRussell 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: 168673970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) 168773970055SRussell King sfp_sm_fault(sfp, true); 168873970055SRussell King else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) 1689eefa6f1fSRussell King init_done: sfp_sm_link_check_los(sfp); 169073970055SRussell King break; 169173970055SRussell King 169273970055SRussell King case SFP_S_WAIT_LOS: 169373970055SRussell King if (event == SFP_E_TX_FAULT) 169473970055SRussell King sfp_sm_fault(sfp, true); 1695710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 169673970055SRussell King sfp_sm_link_up(sfp); 169773970055SRussell King break; 169873970055SRussell King 169973970055SRussell King case SFP_S_LINK_UP: 170073970055SRussell King if (event == SFP_E_TX_FAULT) { 170173970055SRussell King sfp_sm_link_down(sfp); 170273970055SRussell King sfp_sm_fault(sfp, true); 1703710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 170473970055SRussell King sfp_sm_link_down(sfp); 170573970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 170673970055SRussell King } 170773970055SRussell King break; 170873970055SRussell King 170973970055SRussell King case SFP_S_TX_FAULT: 171073970055SRussell King if (event == SFP_E_TIMEOUT) { 171173970055SRussell King sfp_module_tx_fault_reset(sfp); 171273970055SRussell King sfp_sm_next(sfp, SFP_S_REINIT, T_INIT_JIFFIES); 171373970055SRussell King } 171473970055SRussell King break; 171573970055SRussell King 171673970055SRussell King case SFP_S_REINIT: 171773970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 171873970055SRussell King sfp_sm_fault(sfp, false); 171973970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 172073970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 172173970055SRussell King sfp_sm_link_check_los(sfp); 172273970055SRussell King } 172373970055SRussell King break; 172473970055SRussell King 172573970055SRussell King case SFP_S_TX_DISABLE: 172673970055SRussell King break; 172773970055SRussell King } 1728e85d81a1SRussell King } 1729e85d81a1SRussell King 1730e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 1731e85d81a1SRussell King { 1732e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 1733e85d81a1SRussell King 1734e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 1735e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 1736e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 1737e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 1738e85d81a1SRussell King event_to_str(event)); 1739e85d81a1SRussell King 1740e85d81a1SRussell King sfp_sm_module(sfp, event); 1741e85d81a1SRussell King sfp_sm_device(sfp, event); 1742e85d81a1SRussell King sfp_sm_main(sfp, event); 174373970055SRussell King 17444005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 17454005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 17464005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 17474005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 174873970055SRussell King 174973970055SRussell King mutex_unlock(&sfp->sm_mutex); 175073970055SRussell King } 175173970055SRussell King 1752b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 1753b5bfc21aSRussell King { 1754b5bfc21aSRussell King sfp->attached = true; 1755b5bfc21aSRussell King if (sfp->state & SFP_F_PRESENT) 1756b5bfc21aSRussell King sfp_sm_event(sfp, SFP_E_INSERT); 1757b5bfc21aSRussell King } 1758b5bfc21aSRussell King 1759b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 1760b5bfc21aSRussell King { 1761b5bfc21aSRussell King sfp->attached = false; 1762b5bfc21aSRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 1763b5bfc21aSRussell King } 1764b5bfc21aSRussell King 176573970055SRussell King static void sfp_start(struct sfp *sfp) 176673970055SRussell King { 176773970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 176873970055SRussell King } 176973970055SRussell King 177073970055SRussell King static void sfp_stop(struct sfp *sfp) 177173970055SRussell King { 177273970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 177373970055SRussell King } 177473970055SRussell King 177573970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 177673970055SRussell King { 177773970055SRussell King /* locking... and check module is present */ 177873970055SRussell King 1779ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 1780ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 178173970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 178273970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 178373970055SRussell King } else { 178473970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 178573970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 178673970055SRussell King } 178773970055SRussell King return 0; 178873970055SRussell King } 178973970055SRussell King 179073970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 179173970055SRussell King u8 *data) 179273970055SRussell King { 179373970055SRussell King unsigned int first, last, len; 179473970055SRussell King int ret; 179573970055SRussell King 179673970055SRussell King if (ee->len == 0) 179773970055SRussell King return -EINVAL; 179873970055SRussell King 179973970055SRussell King first = ee->offset; 180073970055SRussell King last = ee->offset + ee->len; 180173970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 180273970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 180373970055SRussell King len -= first; 180473970055SRussell King 18052794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 180673970055SRussell King if (ret < 0) 180773970055SRussell King return ret; 180873970055SRussell King 180973970055SRussell King first += len; 181073970055SRussell King data += len; 181173970055SRussell King } 18122794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 181373970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 181473970055SRussell King len -= first; 181573970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 181673970055SRussell King 18172794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 181873970055SRussell King if (ret < 0) 181973970055SRussell King return ret; 182073970055SRussell King } 182173970055SRussell King return 0; 182273970055SRussell King } 182373970055SRussell King 182473970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 1825b5bfc21aSRussell King .attach = sfp_attach, 1826b5bfc21aSRussell King .detach = sfp_detach, 182773970055SRussell King .start = sfp_start, 182873970055SRussell King .stop = sfp_stop, 182973970055SRussell King .module_info = sfp_module_info, 183073970055SRussell King .module_eeprom = sfp_module_eeprom, 183173970055SRussell King }; 183273970055SRussell King 183373970055SRussell King static void sfp_timeout(struct work_struct *work) 183473970055SRussell King { 183573970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 183673970055SRussell King 183773970055SRussell King rtnl_lock(); 183873970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 183973970055SRussell King rtnl_unlock(); 184073970055SRussell King } 184173970055SRussell King 184273970055SRussell King static void sfp_check_state(struct sfp *sfp) 184373970055SRussell King { 184473970055SRussell King unsigned int state, i, changed; 184573970055SRussell King 18462158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 184773970055SRussell King state = sfp_get_state(sfp); 184873970055SRussell King changed = state ^ sfp->state; 184973970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 185073970055SRussell King 185173970055SRussell King for (i = 0; i < GPIO_MAX; i++) 185273970055SRussell King if (changed & BIT(i)) 185373970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 185473970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 185573970055SRussell King 185673970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 185773970055SRussell King sfp->state = state; 185873970055SRussell King 185973970055SRussell King rtnl_lock(); 186073970055SRussell King if (changed & SFP_F_PRESENT) 186173970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 186273970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 186373970055SRussell King 186473970055SRussell King if (changed & SFP_F_TX_FAULT) 186573970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 186673970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 186773970055SRussell King 186873970055SRussell King if (changed & SFP_F_LOS) 186973970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 187073970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 187173970055SRussell King rtnl_unlock(); 18722158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 187373970055SRussell King } 187473970055SRussell King 187573970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 187673970055SRussell King { 187773970055SRussell King struct sfp *sfp = data; 187873970055SRussell King 187973970055SRussell King sfp_check_state(sfp); 188073970055SRussell King 188173970055SRussell King return IRQ_HANDLED; 188273970055SRussell King } 188373970055SRussell King 188473970055SRussell King static void sfp_poll(struct work_struct *work) 188573970055SRussell King { 188673970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 188773970055SRussell King 188873970055SRussell King sfp_check_state(sfp); 188973970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 189073970055SRussell King } 189173970055SRussell King 189273970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 189373970055SRussell King { 189473970055SRussell King struct sfp *sfp; 189573970055SRussell King 189673970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 189773970055SRussell King if (!sfp) 189873970055SRussell King return ERR_PTR(-ENOMEM); 189973970055SRussell King 190073970055SRussell King sfp->dev = dev; 190173970055SRussell King 190273970055SRussell King mutex_init(&sfp->sm_mutex); 19032158e856SRobert Hancock mutex_init(&sfp->st_mutex); 190473970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 190573970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 190673970055SRussell King 190773970055SRussell King return sfp; 190873970055SRussell King } 190973970055SRussell King 191073970055SRussell King static void sfp_cleanup(void *data) 191173970055SRussell King { 191273970055SRussell King struct sfp *sfp = data; 191373970055SRussell King 191473970055SRussell King cancel_delayed_work_sync(&sfp->poll); 191573970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 191673970055SRussell King if (sfp->i2c_mii) { 191773970055SRussell King mdiobus_unregister(sfp->i2c_mii); 191873970055SRussell King mdiobus_free(sfp->i2c_mii); 191973970055SRussell King } 192073970055SRussell King if (sfp->i2c) 192173970055SRussell King i2c_put_adapter(sfp->i2c); 192273970055SRussell King kfree(sfp); 192373970055SRussell King } 192473970055SRussell King 192573970055SRussell King static int sfp_probe(struct platform_device *pdev) 192673970055SRussell King { 1927259c8618SRussell King const struct sff_data *sff; 19287ce236faSRuslan Babayev struct i2c_adapter *i2c; 192973970055SRussell King struct sfp *sfp; 193073970055SRussell King bool poll = false; 1931257c2559SRobert Hancock int err, i; 193273970055SRussell King 193373970055SRussell King sfp = sfp_alloc(&pdev->dev); 193473970055SRussell King if (IS_ERR(sfp)) 193573970055SRussell King return PTR_ERR(sfp); 193673970055SRussell King 193773970055SRussell King platform_set_drvdata(pdev, sfp); 193873970055SRussell King 193973970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 194073970055SRussell King if (err < 0) 194173970055SRussell King return err; 194273970055SRussell King 1943259c8618SRussell King sff = sfp->type = &sfp_data; 1944259c8618SRussell King 194573970055SRussell King if (pdev->dev.of_node) { 194673970055SRussell King struct device_node *node = pdev->dev.of_node; 1947259c8618SRussell King const struct of_device_id *id; 194873970055SRussell King struct device_node *np; 194973970055SRussell King 1950259c8618SRussell King id = of_match_node(sfp_of_match, node); 1951259c8618SRussell King if (WARN_ON(!id)) 1952259c8618SRussell King return -EINVAL; 1953259c8618SRussell King 1954259c8618SRussell King sff = sfp->type = id->data; 1955259c8618SRussell King 195673970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 195766ede1f9SAntoine Tenart if (!np) { 195866ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 195966ede1f9SAntoine Tenart return -ENODEV; 196066ede1f9SAntoine Tenart } 196173970055SRussell King 196273970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 196373970055SRussell King of_node_put(np); 19647ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 19657ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 19667ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 19677ce236faSRuslan Babayev struct fwnode_reference_args args; 19687ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 19697ce236faSRuslan Babayev int ret; 19707ce236faSRuslan Babayev 19717ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 19721086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 19737ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 19747ce236faSRuslan Babayev return -ENODEV; 19757ce236faSRuslan Babayev } 19767ce236faSRuslan Babayev 19777ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 19787ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 19797ce236faSRuslan Babayev } else { 19807ce236faSRuslan Babayev return -EINVAL; 19817ce236faSRuslan Babayev } 19827ce236faSRuslan Babayev 198373970055SRussell King if (!i2c) 198473970055SRussell King return -EPROBE_DEFER; 198573970055SRussell King 198673970055SRussell King err = sfp_i2c_configure(sfp, i2c); 198773970055SRussell King if (err < 0) { 198873970055SRussell King i2c_put_adapter(i2c); 198973970055SRussell King return err; 199073970055SRussell King } 199173970055SRussell King 1992259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 1993259c8618SRussell King if (sff->gpios & BIT(i)) { 199473970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 199573970055SRussell King gpio_of_names[i], gpio_flags[i]); 199673970055SRussell King if (IS_ERR(sfp->gpio[i])) 199773970055SRussell King return PTR_ERR(sfp->gpio[i]); 199873970055SRussell King } 199973970055SRussell King 200073970055SRussell King sfp->get_state = sfp_gpio_get_state; 200173970055SRussell King sfp->set_state = sfp_gpio_set_state; 2002259c8618SRussell King 2003259c8618SRussell King /* Modules that have no detect signal are always present */ 2004259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2005259c8618SRussell King sfp->get_state = sff_gpio_get_state; 200673970055SRussell King 20073bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 20083bb35261SJon Nettleton &sfp->max_power_mW); 20093bb35261SJon Nettleton if (!sfp->max_power_mW) 20103bb35261SJon Nettleton sfp->max_power_mW = 1000; 20113bb35261SJon Nettleton 20123bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 20133bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 20143bb35261SJon Nettleton 201573970055SRussell King /* Get the initial state, and always signal TX disable, 201673970055SRussell King * since the network interface will not be up. 201773970055SRussell King */ 201873970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 201973970055SRussell King 202073970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 202173970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 202273970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 202373970055SRussell King sfp_set_state(sfp, sfp->state); 202473970055SRussell King sfp_module_tx_disable(sfp); 202573970055SRussell King 202673970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 202773970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 202873970055SRussell King continue; 202973970055SRussell King 2030257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 2031257c2559SRobert Hancock if (!sfp->gpio_irq[i]) { 203273970055SRussell King poll = true; 203373970055SRussell King continue; 203473970055SRussell King } 203573970055SRussell King 2036257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2037257c2559SRobert Hancock NULL, sfp_irq, 203873970055SRussell King IRQF_ONESHOT | 203973970055SRussell King IRQF_TRIGGER_RISING | 204073970055SRussell King IRQF_TRIGGER_FALLING, 204173970055SRussell King dev_name(sfp->dev), sfp); 2042257c2559SRobert Hancock if (err) { 2043257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 204473970055SRussell King poll = true; 204573970055SRussell King } 2046257c2559SRobert Hancock } 204773970055SRussell King 204873970055SRussell King if (poll) 204973970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 205073970055SRussell King 2051a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2052a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2053a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2054a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2055a1f5d1f0SAntoine Tenart */ 2056a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2057a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2058a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2059a1f5d1f0SAntoine Tenart 2060b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2061b5bfc21aSRussell King if (!sfp->sfp_bus) 2062b5bfc21aSRussell King return -ENOMEM; 2063b5bfc21aSRussell King 206473970055SRussell King return 0; 206573970055SRussell King } 206673970055SRussell King 206773970055SRussell King static int sfp_remove(struct platform_device *pdev) 206873970055SRussell King { 206973970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 207073970055SRussell King 207173970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 207273970055SRussell King 207373970055SRussell King return 0; 207473970055SRussell King } 207573970055SRussell King 2076257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2077257c2559SRobert Hancock { 2078257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2079257c2559SRobert Hancock int i; 2080257c2559SRobert Hancock 2081257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2082257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2083257c2559SRobert Hancock continue; 2084257c2559SRobert Hancock 2085257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2086257c2559SRobert Hancock } 2087257c2559SRobert Hancock 2088257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2089257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2090257c2559SRobert Hancock } 2091257c2559SRobert Hancock 209273970055SRussell King static struct platform_driver sfp_driver = { 209373970055SRussell King .probe = sfp_probe, 209473970055SRussell King .remove = sfp_remove, 2095257c2559SRobert Hancock .shutdown = sfp_shutdown, 209673970055SRussell King .driver = { 209773970055SRussell King .name = "sfp", 209873970055SRussell King .of_match_table = sfp_of_match, 209973970055SRussell King }, 210073970055SRussell King }; 210173970055SRussell King 210273970055SRussell King static int sfp_init(void) 210373970055SRussell King { 210473970055SRussell King poll_jiffies = msecs_to_jiffies(100); 210573970055SRussell King 210673970055SRussell King return platform_driver_register(&sfp_driver); 210773970055SRussell King } 210873970055SRussell King module_init(sfp_init); 210973970055SRussell King 211073970055SRussell King static void sfp_exit(void) 211173970055SRussell King { 211273970055SRussell King platform_driver_unregister(&sfp_driver); 211373970055SRussell King } 211473970055SRussell King module_exit(sfp_exit); 211573970055SRussell King 211673970055SRussell King MODULE_ALIAS("platform:sfp"); 211773970055SRussell King MODULE_AUTHOR("Russell King"); 211873970055SRussell King MODULE_LICENSE("GPL v2"); 2119